[go: up one dir, main page]

CN114370028B - Laying method of geomembrane on gravel soil substrate - Google Patents

Laying method of geomembrane on gravel soil substrate Download PDF

Info

Publication number
CN114370028B
CN114370028B CN202111371638.2A CN202111371638A CN114370028B CN 114370028 B CN114370028 B CN 114370028B CN 202111371638 A CN202111371638 A CN 202111371638A CN 114370028 B CN114370028 B CN 114370028B
Authority
CN
China
Prior art keywords
paving
geomembrane
adopting
layer
laying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111371638.2A
Other languages
Chinese (zh)
Other versions
CN114370028A (en
Inventor
吴琦
沈正茂
廖志彬
党仕全
王舜
丁国权
袁俊平
曹雪山
邱豪磊
胡有方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yinchuan China Railway Water Group Co ltd
Hohai University HHU
Original Assignee
Yinchuan China Railway Water Group Co ltd
Hohai University HHU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yinchuan China Railway Water Group Co ltd, Hohai University HHU filed Critical Yinchuan China Railway Water Group Co ltd
Priority to CN202111371638.2A priority Critical patent/CN114370028B/en
Publication of CN114370028A publication Critical patent/CN114370028A/en
Application granted granted Critical
Publication of CN114370028B publication Critical patent/CN114370028B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
    • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
    • D06M13/325—Amines
    • D06M13/328—Amines the amino group being bound to an acyclic or cycloaliphatic carbon atom
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • D06M15/248—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing chlorine
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention discloses a laying method of a geomembrane on a gravel soil substrate, and relates to the field of hydraulic engineering. The application is laid base surface, lower cushion layer, lower protective layer, multilayer composite geomembrane, upper protective layer, upper cushion layer and inoxidizing coating from bottom to top in proper order, carries out the laying of geomembrane on the gravel soil basement. Wherein, the non-woven fabric is fully soaked in the modified polyethylene, methoxy and hydroxyl on the modified polyethylene react with hydroxyl and carboxyl on the non-woven fabric, and the non-woven fabric is firmly attached to the inside and the surface of the non-woven fabric, thus obtaining the composite geomembrane; and then coating the composite geomembrane with modified silica gel, wherein the formylic acid groups in the modified silica gel react with hydroxyl groups on the surface of the composite geomembrane to generate covalent bond crosslinking, the formylic acid groups are firmly attached to the surface of the composite geomembrane, carbonic acid generated in the coating process in the heat curing process is decomposed into carbon dioxide gas, and a porous structure is formed on the surface of the composite geomembrane, so that the multilayer composite geomembrane with excellent tensile strength, ageing resistance and stability is obtained.

Description

Laying method of geomembrane on gravel soil substrate
Technical Field
The invention relates to the field of hydraulic engineering, in particular to a method for paving a geomembrane on a gravel soil substrate.
Background
In the construction of plain reservoirs, a horizontal barrier solution for the entire reservoir bottom is typically required when the reservoir area lacks an effective thickness of impermeable strata. The impermeable reservoir adopting the geomembrane reservoir disc has a huge reservoir disc area, such as a reservoir of new city in Zibo, shandong province, which is paved with about 1.0km2 of plastic; the expansion and reconstruction engineering of the Xixia reservoir has an area of 2.09km2; the length of the Shandong Texas great Tun reservoir is about 3km, the width is about 2km, and the reservoir water storage area is about 6km2, so that the selection of a proper geomembrane seepage prevention structure and a proper laying method are very important.
In view of the importance of geomembranes in warehouse-disc seepage-proofing structures, the Polyethylene (PE) geomembrane seepage-proofing engineering technical Specification (SL/T231-98) 2.3.1 prescribes that the geomembrane seepage-proofing engineering structure should be determined according to engineering specific requirements, and the engineering structural design should comprise the following three contents: the lower support layer is designed, the geomembrane impermeable layer is designed, and the upper protective layer is designed. However, the sorting property of the corner gravels in the reservoir area is poor, the grain size is generally 20-50mm, the maximum grain size is 130mm, the grain size is more than 2mm, the total weight is 60-80%, the components are sandstone, limestone and the like, and coarse and fine sand is filled. According to the technical specification of Polyethylene (PE) geomembrane impermeable engineering (SL/T231-98) appendix A, the support layer shall comprise an upper bedding layer and a lower transition layer, the transition layer adopts crushed stone with the grain size of 5-15cm, the bedding layer is paved on the transition layer, and the grain size is determined according to the geomembrane thickness: the bedding layer is made of gravels with the grain diameter smaller than 1cm or pebbles with the grain diameter smaller than 2cm when the film thickness is about 1 mm; gravel with the grain size smaller than 0.5cm is used for the cushion layer with the film thickness of about 0.6cm, and if a composite geomembrane with a PE geomembrane sandwiched between double layers of non-woven fabrics is used, the grain size of the cushion layer material can be thickened, and the gravel or broken stone with the grain size smaller than 4cm is used. The fine sand layer distributed on site is light yellow, gray, in a slightly dense-dense state, saturated and contains a small amount of gravel of 5-6cm.
In conclusion, the stratum of the reservoir area mainly distributes the gravel soil, contains a large amount of gravel with the particle size of 2-13cm, has poor sorting property, and the on-site fine sand material also has small part of gravel with the particle size of 2-6cm, so that serious engineering problems are brought to the geomembrane seepage prevention scheme.
Disclosure of Invention
The invention aims to provide a method for paving a geomembrane on a gravel soil substrate, which aims to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
a method for paving a geomembrane on a gravel soil substrate comprises the steps of paving a base surface, a lower cushion layer, a lower protective layer, a multi-layer composite geomembrane, an upper protective layer, an upper cushion layer and a protective layer sequentially from bottom to top.
Further, the method for paving the geomembrane on the gravel soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 100-120 m, the width of 6-6.5 m and the depth of 3-3.5 m, adopting a 22t road roller to flatten the field, compacting the flattened gravel civil basal plane, and ensuring the relative density to be 0.75-0.8; digging exhaust blind ditches at 0.8-1 m of four edges in the earthwork by adopting a small digging machine, arranging transverse blind ditches at intervals of 15-20 m in the range of longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 600-720 m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 600-720 m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a screen with the screen mesh diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, compacting and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Paving and connecting a lower protective layer, a multi-layer composite geomembrane and an upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 610-730 m 2 The side line is 50-60 cm beyond the laying side line of the multi-layer composite geomembrane on the cloth, hot air welding at 250 ℃ is adopted for geotextile connection, the lap joint width is 10cm, and the laying and connection of the lower protective layer are completed; laying again 600-720 m 2 The multi-layer composite geomembrane is welded by double-seam heat at 350 ℃ and has a lap joint width of 10cm, so that the laying and connection of the multi-layer composite geomembrane are completed; then the protective layer is spread for 300g/m 2 Geotextile 610-730 m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 40-45 cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.5-0.8 m, leveling the soil covering cushion layer by using a land leveler, and finishing paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader to pave for 0.6-0.8 m; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.95-1 m, and flattening by adopting a 22t road roller after sprinkling water to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditches in the step (1) are long-side blind ditches which are 0.8-1 m away from the inside of the broad sides and the long sides of the earthwork and have the length of 98-118 m; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the preparation method of the multilayer composite geomembrane in the step (3) comprises the following steps:
a. adding polyvinyl chloride alcohol into deionized water with the mass 1-2 times of that of the polyvinyl chloride alcohol, stirring for 30min at 90-95 ℃ at 800r/min, adding sodium trimethylsiloxy pyruvate with the mass 0.25-0.5 times of that of the polyvinyl chloride alcohol, continuously stirring for 5h, adding 1, 2-epoxy-3-amino butanol with the mass 0.25-0.5 times of that of the polyvinyl chloride alcohol, and continuously stirring for 3h at 80 ℃ to prepare modified polyethylene film liquid;
b. Adding hydroxyl-terminated polychlorosiloxane into anhydrous toluene with the mass of 12.5-13 times of that of the hydroxyl-terminated polychlorosiloxane, stirring at 800r/min, refluxing for 1h in an oil bath at 110 ℃, adding epoxy trimethoxysilane with the mass of 1.5-2 times of that of the hydroxyl-terminated polychlorosiloxane, continuously refluxing for 1h, placing into a vacuum rotary evaporator, heating to 110 ℃, taking out when toluene with the mass of 5 times of that of nano silicon dioxide sol is obtained by vacuum rotary evaporation at 160r/min, and adding potassium diformate with the mass of 3-3.2 times of that of the hydroxyl-terminated polychlorosiloxane under the ice bath condition at 4 ℃ for mixing to obtain modified silica gel;
c. immersing non-woven fabrics in modified polyethylene film liquid with the mass of 3.8-4.2 times of that of the non-woven fabrics at the temperature of 75-85 ℃ under the vacuum condition of 10Pa, immersing for 24 hours, soaking, taking out, cooling to room temperature, and airing to obtain a composite geomembrane with the thickness of 0.64-0.72 mm;
d. stirring and mixing the modified silica gel and tetraethoxysilane with the mass of 0.02-0.03 times of that of the modified silica gel for 5min at normal temperature and 300r/min to obtain a modified silica gel mixed solution; then defoaming the modified silica gel mixed solution under 10Pa vacuum for 5min to obtain a defoamed modified silica gel mixed solution; immersing the composite geomembrane into a modified silica gel mixed solution with the mass of 2.5-3 times of that of the composite geomembrane, immersing for 24 hours, taking out, and curing for 16 hours at 60 ℃ to obtain the multilayer composite geomembrane with the surface layer thickness of 0.8-1.2 mm.
Further, the non-woven fabric in the step c is a 0.56mm thick alginate fiber non-woven fabric.
Compared with the prior art, the invention has the following beneficial effects:
when the geotechnical film on the gravel soil substrate is paved, the non-woven fabric is fully soaked in the modified polyethylene to obtain the composite geotechnical film, the composite geotechnical film is wrapped and thermally cured by the modified silica gel to obtain a multi-layer composite geotechnical film, and then the multi-layer composite geotechnical film, the upper protective layer and the protective layer are paved from bottom to top according to the base surface, the lower cushion layer, the lower protective layer and the multi-layer composite geotechnical film; the modified polyethylene is prepared by mixing sodium trimethylsiloxypyruvic acid, 1, 2-epoxy-3-aminobutyl alcohol and polyvinyl alcohol; the modified silica gel is prepared by mixing modified polychlorosiloxane with potassium diformate; the modified polychlorosiloxane is prepared by mixing hydroxyl-terminated polychlorosiloxane and epoxy trimethoxy silane.
Firstly, adding sodium trimethylsiloxypropionate and 1, 2-epoxy-3-amino butanol into polyvinyl chloride alcohol, mixing, wherein one end of sodium trimethylsiloxypyruvate is firmly grafted on the polyvinyl chloride alcohol through ionic bond fracture, and epoxy groups in the 1, 2-epoxy-3-amino butanol are subjected to ring opening under the nucleophilic action of hydroxyl groups on the polyvinyl chloride alcohol, and grafted on a polyvinyl chloride alcohol molecular chain to obtain modified polyethylene; wherein, the sodium trimethylsiloxypyruvic acid is subjected to demethoxy and reacts with the hydroxyl on the non-woven fabric to firmly graft on the non-woven fabric, and the modified polyethylene and the non-woven fabric fiber are tightly crosslinked together, so that the tensile strength of the composite geomembrane is increased; the hydroxyl in the 1, 2-epoxy-3-aminobutanol and the carboxyl on the non-woven fabric are firmly grafted to the non-woven fabric through esterification reaction, further modified polyethylene and non-woven fabric fibers are connected together, and the 1, 2-epoxy-3-aminobutanol and carbonyl on sodium trimethylsiloxy pyruvate react to form stable diamine bridge bonds, so that the modified polyethylene is crosslinked among the non-woven fabric fibers to form a compact reticular crosslinked structure to reduce gaps on the non-woven fabric, the modified polyethylene molecular chains and the non-woven fabric fibers are also grafted together through covalent bonds, and a compact waterproof film is formed inside and on the surface of the non-woven fabric, so that the ageing resistance of the composite geomembrane is improved.
Secondly, mixing hydroxyl-terminated polychlorosiloxane and epoxy trimethoxy silane, and grafting the hydroxyl-terminated polychlorosiloxane and the epoxy trimethoxy silane together through the dehydrogenation of hydroxyl in the hydroxyl-terminated polychlorosiloxane and the demethoxy reaction of the epoxy trimethoxy silane to prepare modified polychlorosiloxane; mixing modified polychlorosiloxane with potassium diformate, dechlorinating the modified polychlorosiloxane and grafting the dicarboxylic acid together to form a covalent bond under the action of potassium ions in the potassium diformate, so as to obtain modified silica gel, wrapping the composite geomembrane by using the modified silica gel, and thermally curing the composite geomembrane, wherein the formylic acid groups in the modified silica gel react with hydroxyl groups on the surface of the composite geomembrane to generate covalent bond crosslinking, so that the modified silica gel is firmly attached to the surface of the composite geomembrane, and the multilayer composite geomembrane is obtained; the epoxy groups in the modified silica gel are subjected to ring opening under the nucleophilic action of the amino groups on the surface of the composite geomembrane to form covalent bond crosslinking, so that the modified silica gel is further firmly attached to the surface of the composite geomembrane; and when the modified silica gel is heated during impregnation to solidify, carbonic acid generated by the reaction of the formylic acid group and the hydroxyl group in the impregnation system is heated to decompose into carbon dioxide gas, so that the surface of the multilayer composite geomembrane forms a porous structure, and after the multilayer composite geomembrane is subjected to external force during vibration, stress is dispersed in the multilayer composite geomembrane through the porous structure, so that the stability of the multilayer composite geomembrane during vibration is improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
For a clearer description of the method provided by the invention, the following examples are used for describing in detail the methods for testing the indexes of the geomembrane on the breccia substrate laid by the methods for laying the geomembrane on the breccia substrate in the following examples:
stability: the stability of geomembranes on a gravel substrate laid by the methods for laying geomembranes on a gravel substrate of examples and comparative examples was determined by measuring the damping coefficient according to the GB/T18258 standard method.
Tensile strength: the tensile strength of geomembranes on the gravel substrates laid by the methods for laying geomembranes on the gravel substrates of examples and comparative examples was measured according to the GB/T1040 and GB/T10654 standard methods.
Aging resistance: the tensile strength of the geomembrane on the gravel soil substrate laid by the laying method of the geomembrane on the gravel soil substrate of the examples and the comparative examples before and after aging is measured according to the GB/T14522 standard method to measure the aging resistance.
Example 1
The method for paving the geomembrane on the cobble soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 100m, the width of 6m and the depth of 3m, adopting a 22t road roller to flatten the field, compacting and flattening a gravel civil basal plane, and ensuring the relative density to be 0.75; digging exhaust blind ditches at 0.8m of four edges in the earthwork by adopting a small digging machine, arranging transverse blind ditches at intervals of 15m in the range of the longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 600m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 600m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a sieve with the sieve pore diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, paving the thickness of the screened fine sand by adopting the thickness of 10cm, tamping and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Paving and connecting a lower protective layer, a multi-layer composite geomembrane and an upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 610m 2 The side line is 50cm beyond the laying side line of the multi-layer composite geomembrane on the cloth, hot air welding at 250 ℃ is adopted for geotextile connection, the lap joint width is 10cm, and the laying and connection of the lower protective layer are completed; laying again 600m 2 The multi-layer composite geomembrane is welded by double-seam heat at 350 ℃ and has a lap joint width of 10cm, so that the laying and connection of the multi-layer composite geomembrane are completed; then the protective layer is spread for 300g/m 2 Geotextile 610m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 40cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.5m, and leveling the soil covering cushion layer by using a land leveler to finish paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.95m, and flattening by adopting a 22t road roller after sprinkling water, so as to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditches in the step (1) are long-side blind ditches which are 0.8m away from the inside of the wide sides and the long sides of the earthwork and have the length of 98 m; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the preparation method of the multilayer composite geomembrane in the step (3) comprises the following steps:
a. adding polyvinyl chloride alcohol into deionized water with the mass 1 time of the polyvinyl chloride alcohol, stirring for 30min at 90 ℃ at 800r/min, adding sodium trimethylsiloxypyruvic acid with the mass 0.25 time of the polyvinyl chloride alcohol, continuously stirring for 5h, adding 1, 2-epoxy-3-aminobutanol with the mass 0.25 time of the polyvinyl chloride alcohol, and continuously stirring for 3h at 80 ℃ to prepare modified polyethylene film liquid;
b. adding hydroxyl-terminated polychlorosiloxane into anhydrous toluene with the mass of 12.5 times of that of the hydroxyl-terminated polychlorosiloxane, stirring at 800r/min, refluxing for 1h at 110 ℃ in an oil bath, adding epoxy trimethoxysilane with the mass of 1.5 times of that of the hydroxyl-terminated polychlorosiloxane, continuously refluxing for 1h, placing into a vacuum rotary evaporator, heating to 110 ℃, taking out when toluene with the mass of 160r/min being 5 times of that of nano silicon dioxide sol by vacuum rotary evaporation, and adding potassium diformate with the mass of 3 times of that of the hydroxyl-terminated polychlorosiloxane under the ice bath condition at 4 ℃ for mixing to obtain modified silica gel;
c. immersing non-woven fabrics in modified polyethylene film liquid with the mass 3.8 times of that of the non-woven fabrics at the temperature of 75 ℃ under the vacuum condition of 10Pa, immersing for 24 hours, soaking, taking out, cooling to room temperature, and airing to obtain a composite geomembrane with the thickness of 0.64 mm;
d. Stirring and mixing the modified silica gel and ethyl orthosilicate with the mass of 0.02 times of that of the modified silica gel for 5min at normal temperature and 300r/min to obtain a modified silica gel mixed solution; then defoaming the modified silica gel mixed solution under 10Pa vacuum for 5min to obtain a defoamed modified silica gel mixed solution; immersing the composite geomembrane into a modified silica gel mixed solution with the mass of 2.5 times that of the composite geomembrane, immersing for 24 hours, taking out, and curing for 16 hours at 60 ℃ to obtain the multilayer composite geomembrane with the surface layer thickness of 0.8 mm.
Further, the non-woven fabric in the step c is a 0.56mm thick alginate fiber non-woven fabric.
Example 2
The method for paving the geomembrane on the cobble soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 110m, the width of 6.25m and the depth of 6.25m, adopting a 22t road roller to flatten the field, compacting the flattened gravel civil basal plane, and ensuring the relative density to be 0.775; digging exhaust blind ditches at 0.9m of four edges in the earthwork by adopting a small digging machine, arranging transverse blind ditches at intervals of 17.5m in the range of the longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 660m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 660m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening site fine sand excavated materials by adopting a sieve with the sieve pore diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, compacting and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull wire to finish paving a lower cushion layer;
(3) Paving and connecting a lower protective layer, a multi-layer composite geomembrane and an upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 670m 2 The side line exceeds 55cm of the laying side line of the multi-layer composite geomembrane on the cloth, hot air welding at 250 ℃ is adopted for geotextile connection, the lap joint width is 10cm, and the laying and connection of the lower protective layer are completed; re-paved with 660m 2 The multi-layer composite geomembrane is welded by double-seam heat at 350 ℃ and has a lap joint width of 10cm, so that the laying and connection of the multi-layer composite geomembrane are completed; then the protective layer is spread for 300g/m 2 Geotextile 670m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 42.5cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.65m, and leveling the soil covering cushion layer by using a land leveler to finish paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.975m, and flattening by adopting a 22t road roller after sprinkling water to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditches in the step (1) are long-side blind ditches which are 0.9m away from the inside of the wide sides and the long sides of the earthwork and are 108m long; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the preparation method of the multilayer composite geomembrane in the step (3) comprises the following steps:
a. adding polyvinyl chloride alcohol into deionized water with the mass of 1.5 times of that of the polyvinyl chloride alcohol, stirring for 30min at 92.5 ℃ and 800r/min, adding sodium trimethylsiloxypyruvic acid with the mass of 0.375 times of that of the polyvinyl chloride alcohol, continuously stirring for 5h, adding 1, 2-epoxy-3-aminobutanol with the mass of 0.375 times of that of the polyvinyl chloride alcohol, and continuously stirring for 3h at 80 ℃ to prepare modified polyethylene film liquid;
b. Adding hydroxyl-terminated polychlorosiloxane into anhydrous toluene with the mass of 12.75 times of that of the hydroxyl-terminated polychlorosiloxane, stirring at 800r/min, refluxing for 1h at 110 ℃ in an oil bath, adding epoxy trimethoxysilane with the mass of 1.75 times of that of the hydroxyl-terminated polychlorosiloxane, continuously refluxing for 1h, placing into a vacuum rotary evaporator, heating to 110 ℃, taking out when toluene with the mass of 5 times of that of nano silicon dioxide sol is obtained by 160r/min vacuum rotary evaporation, and adding potassium diformate with the mass of 3.1 times of that of the hydroxyl-terminated polychlorosiloxane under the ice bath condition at 4 ℃ for mixing to obtain modified silica gel;
c. immersing the non-woven fabric into a modified polyethylene film liquid with the mass 4 times of that of the non-woven fabric at 80 ℃ under the vacuum condition of 10Pa, immersing for 24 hours, soaking, taking out, cooling to room temperature, and airing to obtain a composite geomembrane with the thickness of 0.68 mm;
d. stirring and mixing the modified silica gel and ethyl orthosilicate with the mass of 0.025 times of that of the modified silica gel for 5min at normal temperature and 300r/min to obtain a modified silica gel mixed solution; then defoaming the modified silica gel mixed solution under 10Pa vacuum for 5min to obtain a defoamed modified silica gel mixed solution; immersing the composite geomembrane into a modified silica gel mixed solution with the mass of 2.75 times of that of the composite geomembrane, immersing for 24 hours, taking out, and curing for 16 hours at 60 ℃ to obtain the multilayer composite geomembrane with the surface layer thickness of 1 mm.
Further, the non-woven fabric in the step c is a 0.56mm thick alginate fiber non-woven fabric.
Example 3
The method for paving the geomembrane on the cobble soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 120m, the width of 6.5m and the depth of 3.5m, adopting a 22t road roller to flatten the field, compacting and flattening the gravel civil basal plane, and ensuring the relative density to be 0.8; digging exhaust blind ditches at 1m of four edges in the earthwork by adopting a small excavator, arranging transverse blind ditches at intervals of 20m in the range of the longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 720m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 720m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a sieve with the sieve pore diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, compacting and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Paving and connecting a lower protective layer, a multi-layer composite geomembrane and an upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 730m 2 The edge line exceeds the laying edge line 60c of the multi-layer composite geomembrane on the clothm, hot air welding at 250 ℃ is adopted for geotextile connection, the lap joint width is 10cm, and the laying and connection of the lower protective layer are completed; paving 720m again 2 The multi-layer composite geomembrane is welded by double-seam heat at 350 ℃ and has a lap joint width of 10cm, so that the laying and connection of the multi-layer composite geomembrane are completed; then the protective layer is spread for 300g/m 2 Geotextile 730m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 45cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.8m, and leveling the soil covering cushion layer by using a land leveler to finish paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 1m, and flattening by adopting a 22t road roller after sprinkling water, so as to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditch in the step (1) is a long-side blind ditch which is 1m away from the inside of the wide side and the long side of the earthwork and is 118m long; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the preparation method of the multilayer composite geomembrane in the step (3) comprises the following steps:
a. adding polyvinyl chloride alcohol into deionized water with the mass 2 times of that of the polyvinyl chloride alcohol, stirring for 30min at 95 ℃ at 800r/min, adding sodium trimethylsiloxypyruvic acid with the mass 0.5 times of that of the polyvinyl chloride alcohol, continuously stirring for 5h, adding 1, 2-epoxy-3-amino butanol with the mass 0.5 times of that of the polyvinyl chloride alcohol, and continuously stirring for 3h at 80 ℃ to prepare modified polyethylene film liquid;
b. adding hydroxyl-terminated polychlorosiloxane into anhydrous toluene with 13 times of the weight of the hydroxyl-terminated polychlorosiloxane, stirring at 800r/min, refluxing at 110 ℃ for 1h in an oil bath, adding epoxy trimethoxy silane with 2 times of the weight of the hydroxyl-terminated polychlorosiloxane, continuously refluxing for 1h, placing into a vacuum rotary evaporator, heating to 110 ℃, taking out when toluene with 160r/min is rotationally evaporated in vacuum and the weight of toluene is 5 times of the weight of nano silica sol, and adding potassium diformate with 3.2 times of the weight of the hydroxyl-terminated polychlorosiloxane under the ice bath condition at 4 ℃ for mixing to obtain modified silica gel;
c. Immersing non-woven fabrics in modified polyethylene film liquid with the mass 4.2 times of that of the non-woven fabrics at 85 ℃ under the vacuum condition of 10Pa, immersing for 24 hours, soaking, taking out, cooling to room temperature, and airing to obtain a composite geomembrane with the thickness of 0.72 mm;
d. stirring and mixing the modified silica gel and ethyl orthosilicate with the mass of 0.03 times of that of the modified silica gel for 5min at normal temperature and 300r/min to obtain a modified silica gel mixed solution; then defoaming the modified silica gel mixed solution under 10Pa vacuum for 5min to obtain a defoamed modified silica gel mixed solution; immersing the composite geomembrane into a 3-time modified silica gel mixed solution, immersing for 24 hours, and curing for 16 hours at 60 ℃ to obtain the multilayer composite geomembrane with the surface layer thickness of 1.2 mm.
Further, the non-woven fabric in the step c is a 0.56mm thick alginate fiber non-woven fabric.
Comparative example 1
The method for paving the geomembrane on the cobble soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 100m, the width of 6m and the depth of 3m, adopting a 22t road roller to flatten the field, compacting and flattening a gravel civil basal plane, and ensuring the relative density to be 0.75; digging exhaust blind ditches at 0.8m of four edges in the earthwork by adopting a small digging machine, arranging transverse blind ditches at intervals of 15m in the range of the longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 600m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 600m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a sieve with the sieve pore diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, paving the thickness of the screened fine sand by adopting the thickness of 10cm, tamping and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Paving and connecting a lower protective layer, a composite geomembrane and an upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 610m 2 The edge line exceeds the laying edge line of the composite geomembrane on the cloth by 50cm, the geotextile is connected by adopting hot air welding at 250 ℃ and the lap joint width is 10cm, so that the laying and the connection of the lower protective layer are completed; laying again 600m 2 The composite geomembrane is welded by double-seam heat sealing at 350 ℃ and has a lap joint width of 10cm, so that the laying and connection of the composite geomembrane are completed; then the protective layer is spread for 300g/m 2 Geotextile 610m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 40cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.5m, and leveling the soil covering cushion layer by using a land leveler to finish paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.95m, and flattening by adopting a 22t road roller after sprinkling water, so as to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditches in the step (1) are long-side blind ditches which are 0.8m away from the inside of the wide sides and the long sides of the earthwork and have the length of 98 m; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the preparation method of the composite geomembrane in the step (3) comprises the following steps:
a. adding polyvinyl chloride alcohol into deionized water with the mass 1 time of the polyvinyl chloride alcohol, stirring for 30min at 90 ℃ at 800r/min, adding sodium trimethylsiloxypyruvic acid with the mass 0.25 time of the polyvinyl chloride alcohol, continuously stirring for 5h, adding 1, 2-epoxy-3-aminobutanol with the mass 0.25 time of the polyvinyl chloride alcohol, and continuously stirring for 3h at 80 ℃ to prepare modified polyethylene film liquid;
b. Immersing non-woven fabrics in modified polyethylene film liquid with the mass 3.8 times of that of the non-woven fabrics at the temperature of 75 ℃ under the vacuum condition of 10Pa, immersing for 24 hours, soaking, taking out, cooling to room temperature, and airing to obtain a composite geomembrane with the thickness of 0.64 mm;
further, the non-woven fabric in the step b is a 0.56mm thick alginate fiber non-woven fabric.
Comparative example 2
The method for paving the geomembrane on the cobble soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 100m, the width of 6m and the depth of 3m, adopting a 22t road roller to flatten the field, compacting and flattening a gravel civil basal plane, and ensuring the relative density to be 0.75; digging exhaust blind ditches at 0.8m of four edges in the earthwork by adopting a small digging machine, arranging transverse blind ditches at intervals of 15m in the range of the longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 600m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 600m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a sieve with the sieve pore diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, paving the thickness of the screened fine sand by adopting the thickness of 10cm, tamping and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Paving and connecting a lower protective layer, a multi-layer composite geomembrane and an upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 610m 2 The side line is 50cm beyond the laying side line of the multi-layer composite geomembrane on the cloth, hot air welding at 250 ℃ is adopted for geotextile connection, the lap joint width is 10cm, and the laying and connection of the lower protective layer are completed; laying again 600m 2 A multi-layer composite geomembrane,adopting double-seam heat seal welding at 350 ℃ to lap the width of 10cm, and finishing the laying and connection of the multi-layer composite geomembrane; then the protective layer is spread for 300g/m 2 Geotextile 610m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 40cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.5m, and leveling the soil covering cushion layer by using a land leveler to finish paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.95m, and flattening by adopting a 22t road roller after sprinkling water, so as to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditches in the step (1) are long-side blind ditches which are 0.8m away from the inside of the wide sides and the long sides of the earthwork and have the length of 98 m; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the preparation method of the multilayer composite geomembrane in the step (3) comprises the following steps:
a. adding polyvinyl chloride alcohol into deionized water with the mass 1 time of that of the polyvinyl chloride alcohol, stirring for 30min at 90 ℃ at 800r/min, adding sodium trimethylsiloxypyruvic acid with the mass 0.25 time of that of the polyvinyl chloride alcohol, and continuously stirring for 5h to prepare modified polyethylene film liquid;
b. adding hydroxyl-terminated polychlorosiloxane into anhydrous toluene with the mass of 12.5 times of that of the hydroxyl-terminated polychlorosiloxane, stirring at 800r/min, refluxing for 1h at 110 ℃ in an oil bath, adding epoxy trimethoxysilane with the mass of 1.5 times of that of the hydroxyl-terminated polychlorosiloxane, continuously refluxing for 1h, placing into a vacuum rotary evaporator, heating to 110 ℃, taking out when toluene with the mass of 160r/min being 5 times of that of nano silicon dioxide sol by vacuum rotary evaporation, and adding potassium diformate with the mass of 3 times of that of the hydroxyl-terminated polychlorosiloxane under the ice bath condition at 4 ℃ for mixing to obtain modified silica gel;
c. Immersing non-woven fabrics in modified polyethylene film liquid with the mass 3.8 times of that of the non-woven fabrics at the temperature of 75 ℃ under the vacuum condition of 10Pa, immersing for 24 hours, soaking, taking out, cooling to room temperature, and airing to obtain a composite geomembrane with the thickness of 0.64 mm;
d. stirring and mixing the modified silica gel and ethyl orthosilicate with the mass of 0.02 times of that of the modified silica gel for 5min at normal temperature and 300r/min to obtain a modified silica gel mixed solution; then defoaming the modified silica gel mixed solution under 10Pa vacuum for 5min to obtain a defoamed modified silica gel mixed solution; immersing the composite geomembrane into a modified silica gel mixed solution with the mass of 2.5 times that of the composite geomembrane, immersing for 24 hours, taking out, and curing for 16 hours at 60 ℃ to obtain the multilayer composite geomembrane with the surface layer thickness of 0.8 mm.
Further, the non-woven fabric in the step c is a 0.56mm thick alginate fiber non-woven fabric.
Comparative example 3
The method for paving the geomembrane on the cobble soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 100m, the width of 6m and the depth of 3m, adopting a 22t road roller to flatten the field, compacting and flattening a gravel civil basal plane, and ensuring the relative density to be 0.75; digging exhaust blind ditches at 0.8m of four edges in the earthwork by adopting a small digging machine, arranging transverse blind ditches at intervals of 15m in the range of the longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 600m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 600m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a sieve with the sieve pore diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, paving the thickness of the screened fine sand by adopting the thickness of 10cm, tamping and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Lower protective layerLaying and connecting the multi-layer composite geomembrane and the upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 610m 2 The side line is 50cm beyond the laying side line of the multi-layer composite geomembrane on the cloth, hot air welding at 250 ℃ is adopted for geotextile connection, the lap joint width is 10cm, and the laying and connection of the lower protective layer are completed; laying again 600m 2 The multi-layer composite geomembrane is welded by double-seam heat at 350 ℃ and has a lap joint width of 10cm, so that the laying and connection of the multi-layer composite geomembrane are completed; then the protective layer is spread for 300g/m 2 Geotextile 610m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 40cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.5m, and leveling the soil covering cushion layer by using a land leveler to finish paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.95m, and flattening by adopting a 22t road roller after sprinkling water, so as to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditches in the step (1) are long-side blind ditches which are 0.8m away from the inside of the wide sides and the long sides of the earthwork and have the length of 98 m; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the preparation method of the multilayer composite geomembrane in the step (3) comprises the following steps:
a. adding polyvinyl chloride alcohol into deionized water with the mass 1 time of that of the polyvinyl chloride alcohol, stirring for 30min at 90 ℃ at 800r/min, adding 1, 2-epoxy-3-amino butanol with the mass 0.25 time of that of the polyvinyl chloride alcohol, and continuously stirring for 3h at 80 ℃ to obtain modified polyethylene membrane liquid;
b. adding hydroxyl-terminated polychlorosiloxane into anhydrous toluene with the mass of 12.5 times of that of the hydroxyl-terminated polychlorosiloxane, stirring at 800r/min, refluxing for 1h at 110 ℃ in an oil bath, adding epoxy trimethoxysilane with the mass of 1.5 times of that of the hydroxyl-terminated polychlorosiloxane, continuously refluxing for 1h, placing into a vacuum rotary evaporator, heating to 110 ℃, taking out when toluene with the mass of 160r/min being 5 times of that of nano silicon dioxide sol by vacuum rotary evaporation, and adding potassium diformate with the mass of 3 times of that of the hydroxyl-terminated polychlorosiloxane under the ice bath condition at 4 ℃ for mixing to obtain modified silica gel;
c. Immersing non-woven fabrics in modified polyethylene film liquid with the mass 3.8 times of that of the non-woven fabrics at the temperature of 75 ℃ under the vacuum condition of 10Pa, immersing for 24 hours, soaking, taking out, cooling to room temperature, and airing to obtain a composite geomembrane with the thickness of 0.64 mm;
d. stirring and mixing the modified silica gel and ethyl orthosilicate with the mass of 0.02 times of that of the modified silica gel for 5min at normal temperature and 300r/min to obtain a modified silica gel mixed solution; then defoaming the modified silica gel mixed solution under 10Pa vacuum for 5min to obtain a defoamed modified silica gel mixed solution; immersing the composite geomembrane into a modified silica gel mixed solution with the mass of 2.5 times that of the composite geomembrane, immersing for 24 hours, taking out, and curing for 16 hours at 60 ℃ to obtain the multilayer composite geomembrane with the surface layer thickness of 0.8 mm.
Further, the non-woven fabric in the step c is a 0.56mm thick alginate fiber non-woven fabric.
Comparative example 4
The method for paving the geomembrane on the cobble soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 100m, the width of 6m and the depth of 3m, adopting a 22t road roller to flatten the field, compacting and flattening a gravel civil basal plane, and ensuring the relative density to be 0.75; digging exhaust blind ditches at 0.8m of four edges in the earthwork by adopting a small digging machine, arranging transverse blind ditches at intervals of 15m in the range of the longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 600m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 600m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a sieve with the sieve pore diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, paving the thickness of the screened fine sand by adopting the thickness of 10cm, tamping and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Laying and connecting a lower protective layer, a plurality of layers of geomembranes and an upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 610m 2 The edge line exceeds the laying edge line of the multi-layer geomembrane on the cloth by 50cm, the connection of the geotextile adopts hot air welding at 250 ℃ and the lap joint width is 10cm, and the laying and the connection of the lower protective layer are completed; laying again 600m 2 The multi-layer geomembrane is welded by double-seam heat at 350 ℃ and has a lap joint width of 10cm, so that the multi-layer geomembrane is paved and connected; then the protective layer is spread for 300g/m 2 Geotextile 610m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 40cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.5m, and leveling the soil covering cushion layer by using a land leveler to finish paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.95m, and flattening by adopting a 22t road roller after sprinkling water, so as to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditches in the step (1) are long-side blind ditches which are 0.8m away from the inside of the wide sides and the long sides of the earthwork and have the length of 98 m; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the preparation method of the multilayer geomembrane in the step (3) comprises the following steps:
a. adding hydroxyl-terminated polychlorosiloxane into anhydrous toluene with the mass of 12.5 times of that of the hydroxyl-terminated polychlorosiloxane, stirring at 800r/min, refluxing for 1h at 110 ℃ in an oil bath, adding epoxy trimethoxysilane with the mass of 1.5 times of that of the hydroxyl-terminated polychlorosiloxane, continuously refluxing for 1h, placing into a vacuum rotary evaporator, heating to 110 ℃, taking out when toluene with the mass of 160r/min being 5 times of that of nano silicon dioxide sol by vacuum rotary evaporation, and adding potassium diformate with the mass of 3 times of that of the hydroxyl-terminated polychlorosiloxane under the ice bath condition at 4 ℃ for mixing to obtain modified silica gel;
b. Stirring and mixing the modified silica gel and ethyl orthosilicate with the mass of 0.02 times of that of the modified silica gel for 5min at normal temperature and 300r/min to obtain a modified silica gel mixed solution; then defoaming the modified silica gel mixed solution under 10Pa vacuum for 5min to obtain a defoamed modified silica gel mixed solution; immersing the composite geomembrane into a modified silica gel mixed solution with the mass of 2.5 times of that of the geomembrane, immersing for 24 hours, taking out, and curing for 16 hours at 60 ℃ to obtain the multilayer geomembrane with the surface layer thickness of 0.8 mm.
Further, the geomembrane in the step b is a polyethylene geomembrane, and the membrane thickness is 0.6mm.
Comparative example 5
The method for paving the geomembrane on the cobble soil substrate mainly comprises the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 100m, the width of 6m and the depth of 3m, adopting a 22t road roller to flatten the field, compacting and flattening a gravel civil basal plane, and ensuring the relative density to be 0.75; digging exhaust blind ditches at 0.8m of four edges in the earthwork by adopting a small digging machine, arranging transverse blind ditches at intervals of 15m in the range of the longitudinal blind ditches, and paving 300g/m on the surfaces of the blind ditches 2 Geotextile 600m 2 Filling egg stone and exhaust pipe, and paving 300g/m 2 Geotextile 600m 2 Leveling the field by using a land leveler to finish the paving of the building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a sieve with the sieve pore diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, paving the thickness of the screened fine sand by adopting the thickness of 10cm, tamping and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Laying and connecting a lower protective layer, a geomembrane and an upper protective layer: laying down a lower protective layer 300g/m 2 Geotextile 610m 2 The edge line exceeds the laid edge line of the geomembrane on the cloth by 50cm, hot air welding at 250 ℃ is adopted for geotextile connection, the lap joint width is 10cm, and the laying and connection of the lower protective layer are completed; laying again 600m 2 The geomembrane is welded by double-slit heat sealing at 350 ℃ and has a lap joint width of 10cm, so that the laying and connection of the geomembrane are completed; then the protective layer is spread for 300g/m 2 Geotextile 610m 2 Hot air welding connection is carried out at the temperature of 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the upper protective layer are completed;
(4) Paving an upper cushion layer; paving and leveling fine sand by adopting a loader matched with a digging machine, wherein the fine sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand paving process, and the thickness of the fine sand paving layer is 40cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.5m, and leveling the soil covering cushion layer by using a land leveler to finish paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.95m, and flattening by adopting a 22t road roller after sprinkling water, so as to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
Further, the longitudinal exhaust blind ditches in the step (1) are long-side blind ditches which are 0.8m away from the inside of the wide sides and the long sides of the earthwork and have the length of 98 m; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
Further, in the step (3), the upper and lower protective layers are 300g/m 2 Filament geotextile.
Further, the geomembrane in the step (3) is a polyethylene geomembrane with the thickness of 0.6 mm.
Effect example
Table 1 below shows the results of performance analysis of geomembranes on a breccia substrate laid using the methods of laying geomembranes on a breccia substrate of examples 1 to 3 of the present invention and comparative examples 1 to 5.
TABLE 1
From comparison of experimental data of example 1, example 2 and example 3, it can be found that the tensile property, stability and aging resistance of the multilayer composite geomembrane are not greatly changed; from comparison of experimental data of example 1 and comparative example 1, it was found that, in the case where the outer layer of the composite geomembrane is not wrapped with the porous silica gel layer, the external force applied to the composite geomembrane during vibration cannot be uniformly dispersed through the internal porous structure, so that the stability of the composite geomembrane is deteriorated; from comparison of experimental data of example 1 and comparative example 2, it can be found that the composite geomembrane has reduced molecular chains covalently crosslinked between non-woven fabrics and polyethylene molecular chains without modification of 1, 2-epoxy-3-aminobutanol, and cannot form diamine bridge bonds to form a stable network structure between substances, and the tensile property of the geomembrane is reduced; from comparison of experimental data of example 1 and comparative example 3, it can be found that the molecular chains of covalent cross-linking between non-woven fabrics and polyethylene molecular chains are reduced without modification of sodium trimethylsiloxypyruvic acid, diamine bridge bonds cannot be formed to form a stable network structure between substances, and the tensile property of the geomembrane is reduced; from comparison of experimental data of example 1 and comparative example 4, it was found that when the geomembrane was not immersed in the modified polyethylene film liquid but was a conventional polyethylene film, the tensile properties and aging resistance of the geomembrane were significantly deteriorated when the mesh structure formed by covalent bonding crosslinking between the nonwoven fabric and the modified polyethylene film liquid was absent. From the experimental data comparison of the example 1 and the comparative example 5 in the table, it is found that the stability, the tensile strength and the ageing resistance of the geomembrane can be effectively improved by completely soaking the non-woven fabric in the modified polyethylene and then wrapping the composite geomembrane with the modified silica gel to obtain the multilayer composite geomembrane.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (3)

1. The method for paving the geomembrane on the cobble soil substrate is characterized by mainly comprising the following preparation steps:
(1) Paving a building base surface: digging an earthwork with the length of 100-120 m, the width of 6-6.5 m and the depth of 3-3.5 m, adopting a 22t road roller to flatten the site, compacting the flattened gravel civil basal plane, and ensuring the relative density to be 0.75-0.8; digging exhaust blind ditches at four sides 0.8-1 m in the earthwork, arranging transverse blind ditches at intervals of 15-20 m in the range of the longitudinal blind ditches, paving 300g/m geotechnical cloth 600-720 m on the surfaces of the blind ditches, filling egg and stone materials and exhaust pipes, paving 300g/m geotechnical cloth 600-720 m, and leveling the ground by using a land leveler to finish paving a building base surface;
(2) Laying a lower cushion layer: screening the site fine sand excavated materials by adopting a screen with the screen hole diameter of 5mm, paving the screened fine sand by adopting a paver, scraping the screened fine sand by adopting a grader, compacting and rolling by adopting a 22t road roller after sprinkling water, and leveling by adopting a surface pull line to finish paving a lower cushion layer;
(3) Paving and connecting a lower protective layer, a multi-layer composite geomembrane and an upper protective layer: laying 300g/m of lower protective layer filament geotextile with 610-730 m, wherein the edge is 50-60 cm beyond the laying edge of the multi-layer composite geomembrane on the cloth, the geotextile is connected by adopting hot air welding at 250 ℃ and the lap joint width is 10cm, so that the laying and connection of the lower protective layer are completed; paving 600-720 m layers of composite geomembranes, and adopting double-slit heat seal welding at 350 ℃ to lap over 10cm in width to finish paving and connecting the layers of composite geomembranes; spreading a protective layer of 300g/m continuous filament geotextile 610-730 m, welding and connecting with hot air at 250 ℃ and overlapping with the width of 10cm to finish the spreading and connecting of the upper protective layer;
the preparation method of the multilayer composite geomembrane comprises the following steps:
a. adding polyvinyl chloride alcohol into deionized water with the mass 1-2 times of that of the polyvinyl chloride alcohol, stirring for 30min at 90-95 ℃ at 800r/min, adding sodium trimethylsiloxy pyruvate with the mass 0.25-0.5 times of that of the polyvinyl chloride alcohol, continuously stirring for 5h, adding 1, 2-epoxy-3-amino butanol with the mass 0.25-0.5 times of that of the polyvinyl chloride alcohol, and continuously stirring for 3h at 80 ℃ to obtain modified polyethylene film liquid;
b. Adding hydroxyl-terminated polychlorosiloxane into anhydrous toluene with the mass of 12.5-13 times of that of the hydroxyl-terminated polychlorosiloxane, stirring at 800r/min, refluxing for 1h in an oil bath at 110 ℃, adding epoxy trimethoxysilane with the mass of 1.5-2 times of that of the hydroxyl-terminated polychlorosiloxane, continuously refluxing for 1h, placing into a vacuum rotary evaporator, heating to 110 ℃, taking out when toluene with the mass of 5 times of that of nano silicon dioxide sol is obtained by vacuum rotary evaporation at 160r/min, and adding potassium diformate with the mass of 3-3.2 times of that of the hydroxyl-terminated polychlorosiloxane under the ice bath condition at 4 ℃ for mixing to obtain modified silica gel;
c. immersing non-woven fabrics with the mass of 0.56mm in modified polyethylene film liquid with the mass of 3.8-4.2 times of that of the non-woven fabrics at the temperature of 75-85 ℃ under the vacuum condition of 10Pa, immersing for 24 hours, immersing and fishing out, cooling to room temperature, and airing to obtain composite geomembranes with the thickness of 0.64-0.72 mm;
d. stirring and mixing the modified silica gel and ethyl orthosilicate with the mass of 0.02-0.03 times of that of the modified silica gel for 5min at normal temperature and 300r/min to obtain a modified silica gel mixed solution; then defoaming the modified silica gel mixed solution under 10Pa vacuum for 5min to obtain a defoamed modified silica gel mixed solution; immersing the composite geomembrane in a modified silica gel mixed solution with the mass of 2.5-3 times that of the composite geomembrane, immersing for 24 hours, taking out, and curing for 16 hours at 60 ℃ to obtain a multilayer composite geomembrane with the surface layer thickness of 0.8-1.2 mm;
(4) Paving an upper cushion layer; spreading and leveling fine sand by adopting a loader together with a digging machine, wherein the sand is paved from the initial paving side of the multilayer composite geomembrane in the fine sand spreading and filling process, and the thickness of the fine sand paving layer is 40-45 cm; paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering cushion layer is 0.5-0.8 m, leveling the soil covering cushion layer by using a land leveler, and finishing paving an upper cushion layer;
(5) And (3) laying a protective layer: paving the gravel soil from the initial paving side of the multilayer composite geomembrane, and paving and leveling the gravel soil by adopting a loader and a grader to pave for 0.6-0.8 m; and (3) paving a soil covering layer by adopting a crawler-type excavator, wherein the thickness of the soil covering layer is 0.95-1 m, and flattening by adopting a 22t road roller after sprinkling water to finish paving a protective layer and finish paving a geomembrane on a gravel soil substrate.
2. The method for laying a geomembrane on a gravel soil substrate according to claim 1, wherein the longitudinal blind ditch in the step (1) is a long-side blind ditch with a distance of 98-118 m from the inside of the wide side and the long side of the earth by 0.8-1 m; when the exhaust blind ditches are paved, after the exhaust pipes are paved in the blind ditches, filling and paving the blind ditches by using pebble materials; the model of the exhaust pipe is MY200.
3. A method of laying a geomembrane on a gravel substrate according to claim 1 wherein the nonwoven fabric in step c is a 0.56mm thick alginate fiber nonwoven fabric.
CN202111371638.2A 2021-11-18 2021-11-18 Laying method of geomembrane on gravel soil substrate Active CN114370028B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111371638.2A CN114370028B (en) 2021-11-18 2021-11-18 Laying method of geomembrane on gravel soil substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111371638.2A CN114370028B (en) 2021-11-18 2021-11-18 Laying method of geomembrane on gravel soil substrate

Publications (2)

Publication Number Publication Date
CN114370028A CN114370028A (en) 2022-04-19
CN114370028B true CN114370028B (en) 2024-03-12

Family

ID=81138428

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111371638.2A Active CN114370028B (en) 2021-11-18 2021-11-18 Laying method of geomembrane on gravel soil substrate

Country Status (1)

Country Link
CN (1) CN114370028B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116694088A (en) * 2023-07-04 2023-09-05 湖南盛业土工材料制造有限公司 Anti-seepage geomembrane capable of preventing microbial corrosion

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581085A (en) * 2009-05-27 2009-11-18 中国水电顾问集团华东勘测设计研究院 Reservoir seepage-proofing geomembrane tiered structure and construction method thereof
RU89431U1 (en) * 2009-07-15 2009-12-10 Открытое акционерное общество "Адмиралтейские верфи" (ОАО "Адмиралтейские верфи") STRUCTURE FOR LOCALIZATION OF SOIL (OPTIONS)
CN103061225A (en) * 2011-10-21 2013-04-24 中铁二十一局集团有限公司 Rock salt railroad bed structure of section parallel to existing line and construction method of structure
CN203755230U (en) * 2014-03-04 2014-08-06 上海市园林设计院有限公司 Northwest region landscape lake center area water storage seepage-proofing structure
CN104107644A (en) * 2014-08-12 2014-10-22 娄尤来 Preparation method of silicone rubber composite film capable of permeating alcohol
CN111395409A (en) * 2020-05-07 2020-07-10 北京高能时代环境技术股份有限公司 Seepage-proofing structure for emergency site construction and construction method of seepage-proofing structure
CN213896585U (en) * 2020-08-13 2021-08-06 北京市政路桥股份有限公司 Fill roadbed structure suitable for water-rich low-lying permafrost region

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581085A (en) * 2009-05-27 2009-11-18 中国水电顾问集团华东勘测设计研究院 Reservoir seepage-proofing geomembrane tiered structure and construction method thereof
RU89431U1 (en) * 2009-07-15 2009-12-10 Открытое акционерное общество "Адмиралтейские верфи" (ОАО "Адмиралтейские верфи") STRUCTURE FOR LOCALIZATION OF SOIL (OPTIONS)
CN103061225A (en) * 2011-10-21 2013-04-24 中铁二十一局集团有限公司 Rock salt railroad bed structure of section parallel to existing line and construction method of structure
CN203755230U (en) * 2014-03-04 2014-08-06 上海市园林设计院有限公司 Northwest region landscape lake center area water storage seepage-proofing structure
CN104107644A (en) * 2014-08-12 2014-10-22 娄尤来 Preparation method of silicone rubber composite film capable of permeating alcohol
CN111395409A (en) * 2020-05-07 2020-07-10 北京高能时代环境技术股份有限公司 Seepage-proofing structure for emergency site construction and construction method of seepage-proofing structure
CN213896585U (en) * 2020-08-13 2021-08-06 北京市政路桥股份有限公司 Fill roadbed structure suitable for water-rich low-lying permafrost region

Also Published As

Publication number Publication date
CN114370028A (en) 2022-04-19

Similar Documents

Publication Publication Date Title
US6505996B1 (en) Drainage system with unitary void-maintaining geosynthetic structure and method for constructing system
CN207793788U (en) Permeable pavement rainwater infiltration structure
CN103696397B (en) A kind of anti-seepage processing method of artificial dam
CN110485228B (en) Hydrothermal closed type anti-frost-heaving slurry-turning high-strength highway subgrade structure and construction method
CN109881659A (en) A foundation reinforcement method of offshore wind power steel pipe pile foundation with anti-scour capability
CN206928164U (en) A kind of drainage type concrete road
CN103572785B (en) All-weather anti-seepage and air-tight landfill soil covering system, preparation method and application
CN106351239B (en) A kind of modified cement soil strengthens geogrids reinforced earth structure and its construction method
CN106836176B (en) The method reinforced sand soil using vacuum pumping technology and improve its engineering characteristic
CN114370028B (en) Laying method of geomembrane on gravel soil substrate
CN105887606B (en) Alpine meadow region heavy cut insulation infiltration combined type underdrain and its construction method
CN109024486A (en) A kind of Han Qu paddles the freeze proof protection against erosion safeguard structure of side slope and its construction method
AU2017321804B2 (en) Use of composite particles for protecting a lifeline structure against seismic wave damage
CN111441211A (en) A carbonaceous soft rock-geosynthetic composite roadbed structure
CN101725159B (en) Method for building impervious liner of refuse landfill by utilizing earthiness firming agent
CN107100047A (en) Suitable for the rock salt bittern road structure and construction method in playa area
CN204825539U (en) Control difference in temperature prevents roadbed structure of cold mountain area highway inhomogeneous deformation
CN114293512B (en) Composite geomembrane impermeable layer structure on dam slope and construction method
CN216615963U (en) Roof is planted to underground works
JP7090965B1 (en) Water-permeable pavement structure and its construction method
CN117325514A (en) A new type of waterproof blanket and preparation method
CN109853595A (en) Cut slope salivary flow ice safeguard structure and method
CN204059287U (en) A kind of earth and rockfill dam leakage preventing structure
CN209457036U (en) A reinforced landscape retaining wall
CN203393531U (en) Road and pavement structure thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant