CN113107018B - Method for treating leakage water of underground structure crack - Google Patents
Method for treating leakage water of underground structure crack Download PDFInfo
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- CN113107018B CN113107018B CN202110557212.XA CN202110557212A CN113107018B CN 113107018 B CN113107018 B CN 113107018B CN 202110557212 A CN202110557212 A CN 202110557212A CN 113107018 B CN113107018 B CN 113107018B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 239000004568 cement Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims description 42
- 239000003822 epoxy resin Substances 0.000 claims description 17
- 229920000647 polyepoxide Polymers 0.000 claims description 17
- 239000004927 clay Substances 0.000 claims description 14
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 12
- 239000011440 grout Substances 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 239000011398 Portland cement Substances 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 229920006351 engineering plastic Polymers 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 2
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- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6806—Waterstops
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a method for treating leakage water of a crack of an underground structure, which comprises the following steps: A. determining the position of a structural crack; B. cleaning and grooving: cleaning sundries at the structural crack, and forming a groove along the structural crack; C. installing a framework pipe: mounting the framework pipe in the groove; D. installing a grouting device: mounting a grouting device at the dense intersection of the structural cracks; E. sealing seams: sealing the surface of the structural crack by adopting a quick-setting cement-based material; F. grouting: pressing grouting liquid into the structural crack through a grouting device by using a pressure pump; G. and (5) dismantling and post-processing the grouting device. The construction method can effectively block water when concrete structure cracks leak water in the underground structure, and realizes technical breakthrough from the surface to the inside of water outlet cracks and from the construction method to materials.
Description
Technical Field
The invention relates to the technical field of underground structure construction. In particular to a method for treating the water leakage of the cracks of the underground structure.
Background
The construction position of an underground structure is usually below the earth surface, the concrete structure of the underground structure is often influenced by underground water due to the effects of surface water seepage and underground water-bearing layers, and quality defects such as cracks, pores, cavities and the like are inevitable in concrete construction, so that the problem of concrete structure crack seepage water is often caused in the underground structure, and the safe use of the underground structure is seriously influenced. For the problem of water leakage of the structural cracks of the underground structures, the traditional water plugging methods comprise two methods: firstly, grooving on the surface of a structural crack, and scraping and sealing with structural adhesive, the method has the defects that the structural adhesive has low bonding strength at a water-containing repair interface, and is very easy to lose efficacy under the action of bearing the pressure of underground water for a long time; secondly, the position of the structural crack is punched and injected with polyurethane, and the method has the defects that the polyurethane is expanded when reacting with water, the polymer strength is low, the injection distance along the structural crack is short, and the durability is poor.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to provide a method for treating water leakage from a crack of an underground structure, so as to solve the problems of low bonding strength between a crack repairing interface of the structure and concrete, short injection distance along the crack of the structure, poor durability, etc.
In order to solve the technical problems, the invention provides the following technical scheme:
a method for treating water leakage of a crack of an underground structure comprises the following steps:
A. determining the position of the structural crack: checking the water leakage position of the underground structure, determining the position of a structural crack and marking the position, wherein the position comprises the position of a water outlet structural crack and the position of the structural crack associated with the water outlet structural crack;
B. cleaning and grooving: cleaning sundries at the structural crack, and forming a groove along the structural crack;
C. installing a framework pipe: mounting the framework pipe in the groove;
D. installing a grouting device: mounting a grouting device at the dense intersection of the structural cracks;
E. sealing the seam: sealing the surface of the structural crack by adopting a quick-setting cement-based material;
F. grouting: pressing grouting liquid into the structural crack through a grouting device by using a pressure pump;
G. dismantling and post-processing the grouting device: and after grouting is completed, removing the grouting device, repairing and flattening the installation position of the grouting device by using a quick-setting cement-based material, and polishing and flattening the sealing layer on the surface of the structural crack after curing for 24 hours.
The method for treating the water leakage of the underground structure crack comprises the following steps: when the groove is formed, the structural crack is used as a central line, the groove with the groove width of 20-40 mm is formed by riding the structural crack, the groove depth of the groove is the same as the groove width, and the cross section of the groove is rectangular.
The method for treating the water leakage of the underground structure crack comprises the following steps: firstly, removing the powder ash in the groove by using a brush and clear water, and continuously putting the framework pipe from one end to the other end along the groove; the outer diameter of the framework pipe is 2-3 mm smaller than the groove width; the skeleton pipe is a through long skeleton pipe with a hollow tubular structure, and two or more pipe wall holes are formed in the pipe wall of the skeleton pipe; the tube wall hole is communicated with the hollow tubular structure of the framework tube; the grouting liquid can be injected into the grooves through the pipe wall holes on the framework pipes when flowing along the framework pipes, so that the gaps between the grooves and the framework pipes are filled with the grouting liquid; the framework pipe is made of metal or engineering plastic; the skeleton tube can be braided by a wire harness or directly punched on the tube wall by a hollow tube. The framework pipe can play a role in guiding grouting liquid to perform grouting along the crack of the groove structure, and also provides a certain supporting force for subsequent sealing treatment, so that the compactness of the sealing layer is improved, and the compressive strength of the repaired crack of the structure is enhanced.
The method for treating the water leakage of the underground structure crack comprises the following steps: taking the central position of the cross points of the plurality of structural cracks as the position of a grout outlet hole on the grouting device, and drilling a drill hole at the central position vertical to the bottom surface of the groove by using an impact drill, wherein the diameter of the drill hole is 4-8mm longer than the width of the groove, and the depth of the drill hole is 30-60 mm; the drilling hole is used for installing the tubular grouting device, and the pipe wall of the tubular grouting device has certain thickness, so that the diameter of the drilling hole is 4-8mm longer than the width of the groove in order to ensure that the effective overflowing area of the slurry is matched with the overflowing of a grouting channel; then cleaning the dust in the drill hole, inserting the grouting device into the drill hole, and adjusting the installation position of the grouting device to enable a grout outlet on the grouting device to be positioned at the center position of the framework pipe; and finally, anchoring by using a quick-setting cement-based material. The slurry outlet hole on the grouting device is adjusted to be positioned at the center of the framework pipe, so that grouting liquid can be smoothly injected into the framework pipe and flows along the framework pipe to achieve the purpose of grouting.
In the step D, the grouting device comprises a grouting pipe, a three-way pipe, a grouting stop valve and a water drainage stop valve; the first end of the grouting pipe is connected with a first through pipe of the three-way pipe in a pipe joint manner; the second pipe of the three-way pipe is connected with the grouting stop valve in a pipe joint mode, the third pipe of the three-way pipe is connected with the water drainage stop valve in a pipe joint mode, and the grouting stop valve is connected with a slurry outlet pipeline of the pressure pump during grouting; the slurry outlet holes are formed in the pipe wall of the second end of the grouting pipe, the number of the slurry outlet holes is two or more, and the two or more slurry outlet holes are distributed at equal intervals along the circumferential direction of the pipe wall of the second end of the grouting pipe;
the grouting pipe is a hollow hard pipe made of metal or plastic. The grouting device can realize simultaneous plugging of a plurality of associated structural cracks, and effectively improves the construction efficiency of water leakage treatment of the structural cracks.
The method for treating the water leakage of the underground structure crack comprises the following steps: the quick-setting cement-based material consists of a part A1 and a part B1; the part A1 consists of 70-75 parts by weight of P.O52.5-grade ordinary portland cement and 25-30 parts by weight of water;
the part B1 comprises 60-72 parts by weight of silica fume, 20-32 parts by weight of water, 6-10 parts by weight of aluminum sulfate, 0.1-0.2 part by weight of sodium chloride and 0.01-0.02 part by weight of triethanolamine;
the mass ratio of the part A1 to the part B1 is 1-1.5: 1.
The method for treating the water leakage of the underground structure crack comprises the following steps: the grouting device is used as a central point, a water drainage stop valve on the grouting device is opened, the surfaces of the grooves are cleaned, then the A1 part and the B1 part of the quick-setting cement-based material are uniformly mixed and smeared on the upper surface of the grooves, pressure is applied to ensure the compactness of a sealing layer, and the surfaces of the grooves are sealed from the farthest end of a structural crack to the central point during sealing. When the crack with water is closed, accumulated water pressure is easy to form, so that the surface cannot be closed; and the grouting device is arranged at the central point and can be used for draining water and reducing pressure, so that the sealing treatment of the groove surface from the farthest end of the structural crack to the central point is easier to operate.
The method for treating the water leakage of the underground structure crack comprises the following steps: after the joint sealing is finished, closing the water drainage stop valve, connecting a slurry outlet pipeline of the pressure pump with a grouting device installed at the intersection of the structural crack, opening the grouting stop valve, pressing clean water in, and checking the tightness and the grouting property of a grouting channel; when the water yield of the injected structural crack is more than or equal to 15L/min in the original state, injecting water plugging by clay cement paste; when the water yield of the injected structure crack is less than 15L/min in the original state, injecting water plugging by using epoxy resin slurry; the final pressure value of the grouting is 1.5 times of the hydrostatic pressure value of the construction position.
The method for treating the water leakage of the underground structure crack comprises the following steps: the clay cement paste consists of 80-90 parts by weight of clay paste, 8.5-15 parts by weight of P.O42.5 grade ordinary portland cement and 1.5-5 parts by weight of water glass. The clay cement paste has excellent permeability, can effectively plug the fracture water of the underground surrounding rock, and can be used for plugging the fracture water of the underground surrounding rock.
The method for treating the water leakage of the underground structure crack comprises the following steps: the epoxy resin slurry consists of an A2 part and a B2 part, wherein the A2 part consists of 85-88 parts by weight of epoxy resin and 12-15 parts by weight of dibutyl phthalate; the part B2 consists of 15-40 parts by weight of T-31 curing agent, 57-84.9 parts by weight of dibutyl phthalate and 0.1-3 parts by weight of DMP-30; the DMP-30 is 2, 4, 6-tris (dimethylaminomethyl) phenol; the mass ratio of the part A2 to the part B2 is 1-2: 1. The epoxy resin slurry has high bonding strength with concrete and high compressive strength of a slurry consolidation body, can effectively resist underground water pressure, and can be used for water plugging of structural cracks.
The technical scheme of the invention achieves the following beneficial technical effects:
(1) according to the invention, rectangular grooves are formed in concrete structure cracks of an underground structure, a through long framework pipe is placed in each groove, the surfaces of the structure cracks are sealed, grouting devices are placed at the intersections of a plurality of structure cracks, and then clay cement slurry or epoxy resin slurry is pressed into the structure cracks by a grouting pump to seal water leakage. The clay cement slurry has excellent permeability and can effectively block the fracture water of the underground surrounding rock; the epoxy resin grout has high bonding strength with concrete, and the grout concreted body has high compressive strength and can effectively resist the underground water pressure. The construction method can simultaneously plug a plurality of water leakage structure cracks, improves the construction efficiency, and simultaneously realizes the synchronous plugging of the surrounding rock water passing channel and the concrete structure cracks.
(2) According to the invention, the grooves are formed along the structural cracks, so that the grouting liquid permeates to the structural cracks through the grooves, and the purpose of water plugging is achieved; meanwhile, the grooves are formed, so that more grouting materials can be injected into the surfaces of the structural cracks, and the cracks are plugged more compactly; according to the invention, the common framework pipe is placed in the groove, the pipe wall of the framework pipe is provided with a plurality of pipe wall holes, the grouting liquid is injected into the groove through the pipe wall holes on the framework pipe when flowing along the framework pipe, so that the gap between the groove and the framework pipe is filled with the grouting liquid, the framework pipe not only plays a role of guiding the grouting liquid to perform grouting along the groove structure crack, but also provides a certain supporting force for subsequent joint sealing treatment, and therefore, the improvement of the compactness of a sealing layer is facilitated, and the compressive strength of the repaired structure crack is enhanced. When the grouting device is installed, the grout outlet on the grouting device is adjusted to be positioned at the center of the framework pipe, so that grouting liquid can be smoothly injected into the framework pipe and flows along the framework pipe to achieve the purpose of grouting.
(3) The invention also discloses a grouting device which can realize simultaneous plugging of a plurality of associated cracks and effectively improve the construction efficiency. The clay cement slurry provided by the invention has the advantage of excellent permeability, can effectively block the fracture water of underground surrounding rock, is suitable for being used when the water yield of the injected structure fracture is more than or equal to 15L/min in the original state, has high bonding strength between the epoxy resin slurry and concrete, has high compressive strength of a slurry consolidation body, can effectively resist the underground water pressure, and is suitable for being used when the water yield of the injected structure fracture is less than 15L/min in the original state.
(4) The construction method for treating the water leakage of the underground structure crack can effectively block water when the underground structure has the condition of water leakage of the concrete structure crack, and realizes technical breakthrough from the surface to the inside of the water outlet crack and from the construction method to the material, has good water blocking effect and strong repair durability, achieves the aim of safe use of the building, and has wide application prospect in the field of the construction of treating the water leakage of the underground structure.
Drawings
FIG. 1 is a floor plan of a grouting apparatus according to the present invention;
FIG. 2 is a sectional view of the construction of the present invention for grouting water in cracks of an underground structure;
FIG. 3 is a schematic view of the grouting apparatus according to the present invention;
FIG. 4 is a cross-sectional view taken at A of FIG. 3 in accordance with the present invention.
The reference numbers in the figures denote: 1-structural cracks; 2-grouting equipment; 3-quick setting cement-based materials; 41-grouting stop valve; 42-a water discharge stop valve; 5-a three-way pipe; 6-grouting pipe; 7-slurry outlet; 8-a groove; 9-framework tube; 10-a concrete structure; 11-underground surrounding rock.
Detailed Description
FIG. 1 is a plan view of a grouting apparatus according to the present invention; FIG. 2 is a sectional view of the construction of the present invention for grouting water in the cracks of the underground structure; fig. 3 is a schematic structural diagram of the grouting device in the invention. The processing method of the present invention will be described below with reference to FIGS. 1 to 3.
A method for treating water leakage of a crack of an underground structure comprises the following steps:
A. determining the position of the structural crack: checking the water leakage position of the underground structure, determining the positions of the structural cracks, including the positions of the water outlet structural cracks and the structural cracks associated (communicated) with the water outlet structural cracks, and marking by using a marker pen;
B. cleaning and grooving: cleaning sundries at the structural crack, and forming a groove along the structural crack;
C. installing a framework pipe: mounting the framework pipe in the groove;
D. installing a grouting device: mounting a grouting device at the dense intersection of the structural cracks;
E. sealing the seam: sealing the surface of the structural crack by adopting a quick-setting cement-based material;
F. grouting: pressing grouting liquid into the structural crack through a grouting device by using a pressure pump;
G. dismantling and post-treating the grouting device: and after grouting is finished, removing the grouting device, repairing and flattening the installation position of the grouting device by using a quick-setting cement-based material, and after curing for 24 hours, polishing and flattening the sealing layer on the surface of the structural crack by using an electric polisher.
In step B: an electric diamond chip grooving machine is used, the structural crack 1 is taken as a central line, a groove 8 with the groove width and the groove depth of 40mm is formed by riding the structural crack 1, and the cross section of the groove 8 is rectangular (see fig. 2).
In step C: firstly, removing the powder ash in the groove 8 by using a brush and clear water, and continuously putting the framework pipe 9 from one end to the other end along the groove 8; the outer diameter of the framework tube 9 is 38 mm; the framework pipe 9 is a through long framework pipe 9 with a hollow tubular structure, and a plurality of pipe wall holes are formed in the pipe wall of the framework pipe 9; the pipe wall holes are communicated with the hollow tubular structures of the framework pipes 9, so that grouting liquid can be injected into the grooves through the pipe wall holes in the framework pipes when flowing along the framework pipes, and the gaps between the grooves and the framework pipes are filled with the grouting liquid; the framework pipe 9 is formed by directly punching a hole on the pipe wall of an engineering plastic hollow pipe; the framework pipe can play a role in guiding grouting liquid to perform grouting along the groove structure crack, and also provides a certain supporting force for subsequent crack sealing treatment, so that the compactness of the sealing layer is improved, and the compressive strength of the repaired structure crack is enhanced.
In step D: a drilling hole is drilled on the central position of the grouting device 2 perpendicular to the bottom surface of the groove 8 by using a percussion drill according to the position of a grouting hole (see figure 1) at the central position of the cross point of the plurality of structural cracks 1, the diameter of the drilling hole is 48mm, and the depth of the drilling hole is 60 mm; then cleaning the dust in the drill hole, inserting the grouting pipe 6 of the grouting device 2 into the drill hole, and adjusting the installation position of the grouting pipe 6 to enable the grout outlet 7 on the grouting pipe 6 to be positioned at the center position of the framework pipe 9; and finally, anchoring by using a quick-setting cement-based material 3. The slurry outlet hole on the grouting device is adjusted to be positioned at the center of the framework pipe, so that grouting liquid can be smoothly injected into the framework pipe and flows along the framework pipe to achieve the purpose of grouting.
As shown in fig. 3 and 4, the grouting device 2 comprises a grouting pipe 6, a three-way pipe 5, a grouting stop valve 41 and a drainage stop valve 42; the first end of the grouting pipe 6 is connected with a first through pipe of the three-way pipe 5; the second pipe of the three-way pipe 5 is connected with the grouting stop valve 41 in a pipe joint mode, the third pipe of the three-way pipe 5 is connected with the drainage stop valve 42 in a pipe joint mode, and the grouting stop valve 41 is connected with a slurry outlet pipeline of the pressure pump during grouting; the slurry outlet holes 7 are formed in the pipe wall of the second end of the grouting pipe 6, the number of the slurry outlet holes 7 is 8, and the 8 slurry outlet holes 7 are circumferentially distributed on the pipe wall of the second end of the grouting pipe 6 at equal intervals; the grouting pipe 6 is a hollow hard pipe made of metal. The grouting device can realize simultaneous plugging of a plurality of associated structural cracks, and effectively improves the construction efficiency of water leakage treatment of the structural cracks.
In step E: and (3) opening a grouting stop valve 42 on the grouting device 2 by taking the grouting device 2 as a central point, cleaning the surface of the groove 8, uniformly mixing the quick-setting cement-based material 3, wiping the mixture on the upper surface of the groove 8, applying pressure to ensure the compactness of a sealing layer, and carrying out surface sealing treatment from the farthest end of the structural crack 1 to the central point during joint sealing. The quick-setting cement-based material 3 consists of a part A1 and a part B1; part A1 consists of 70kg of P.O52.5 grade Portland cement and 30kg of water; part B1 comprises 60kg of silica fume, 32kg of water, 10kg of aluminum sulfate, 0.2kg of sodium chloride and 0.02kg of triethanolamine; the mass ratio of the part A1 to the part B1 is 1: 1.
In step F: after the sealing of the seam is finished, closing the grouting stop valve 42, connecting a slurry outlet pipeline of the pressure pump with a second through pipe of the three-way pipe 5 on the grouting device 2, opening the grouting stop valve 41, pressing clean water in, and checking the tightness and the grouting property of a grouting channel; when the water yield of the injected structure crack 1 in the original state is 18L/min, clay cement slurry is selected as grouting slurry for grouting and water plugging; the final pressure value of the grouting is 1.5 times of the hydrostatic pressure value of the construction position. The clay cement slurry is composed of 90kg of clay slurry, 15kg of P.O42.5 grade ordinary portland cement and 5kg of water glass. The clay cement slurry has excellent permeability and can effectively block 11 fissured water of the underground surrounding rock, so the clay cement slurry is adopted to block 11 fissured water of the underground surrounding rock in the embodiment.
In other embodiments, if the water yield of the injected structural crack 1 in the original state is less than 15L/min, epoxy resin slurry is used as the grouting slurry for grouting; the epoxy resin slurry consists of an A2 part and a B2 part, the A2 part consists of 85kg of epoxy resin and 15kg of dibutyl phthalate, the B2 part consists of 40kg of T-31 curing agent, 57kg of dibutyl phthalate and 3kg of DMP-30, and the mass ratio of the A2 part to the B2 part is 1: 1; wherein the epoxy resin is epoxy resin (E51). The epoxy resin slurry has high bonding strength with concrete, and the slurry consolidation body has high compressive strength and can effectively resist underground water pressure, so the epoxy resin slurry is adopted for water plugging of structural cracks.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (6)
1. A method for processing leakage water of a crack of an underground structure is characterized by comprising the following steps:
A. determining the position of the structural crack: checking the water leakage position of the underground structure, determining the position of the structure crack and marking the position of the structure crack, wherein the position comprises the water outlet structure crack and the position of the structure crack related to the water outlet structure crack;
B. cleaning and grooving: cleaning sundries at the structural crack, and forming a groove along the structural crack;
in step B: when the groove is formed, the structural crack is taken as a central line, a groove with the groove width of 20-40 mm is formed by riding the structural crack, the groove depth of the groove is the same as the groove width, and the cross section of the groove is rectangular;
C. installing a framework pipe: mounting the framework pipe in the groove;
in step C: firstly, removing the powder ash in the groove by using a brush and clear water, and continuously putting the framework pipe from one end to the other end along the groove; the outer diameter of the framework pipe is 2-3 mm smaller than the groove width; the framework pipe is a through long framework pipe with a hollow tubular structure, and two or more pipe wall holes are formed in the pipe wall of the framework pipe; the tube wall hole is communicated with the hollow tubular structure of the framework tube; the framework pipe is made of metal or engineering plastic; the framework pipe is processed by weaving a wire harness or is directly punched on the pipe wall of the framework pipe by a hollow pipe;
D. installing a grouting device: mounting a grouting device at the dense intersection of the structural cracks;
in step D: taking the central position of the cross points of the plurality of structural cracks as the position of a grout outlet hole on the grouting device, and drilling a drill hole at the central position vertical to the bottom surface of the groove by using an impact drill, wherein the diameter of the drill hole is 4-8mm longer than the width of the groove, and the depth of the drill hole is 30-60 mm; then cleaning the dust in the drill hole, inserting the grouting device into the drill hole, and adjusting the installation position of the grouting device to enable a grout outlet on the grouting device to be positioned at the center position of the framework pipe; finally, anchoring by using a quick-setting cement-based material;
the grouting device (2) comprises a grouting pipe (6), a three-way pipe (5), a grouting stop valve (41) and a drainage stop valve (42); the first end of the grouting pipe (6) is connected with a first through pipe of the three-way pipe (5) in a pipe joint manner; a second pipe of the three-way pipe (5) is connected with the grouting stop valve (41) in a pipe mode, a third pipe of the three-way pipe (5) is connected with the draining stop valve (42) in a pipe mode, and the grouting stop valve (41) is connected with a slurry outlet pipeline of the pressure pump during grouting; the slurry outlet holes (7) are formed in the pipe wall of the second end of the grouting pipe (6), two or more slurry outlet holes (7) are formed, and the two or more slurry outlet holes (7) are distributed at equal intervals along the circumferential direction of the pipe wall of the second end of the grouting pipe (6); the grouting pipe (6) is a hollow hard pipe made of metal or plastic;
E. sealing the seam: sealing the surface of the structural crack by adopting a quick-setting cement-based material;
F. grouting: pressing grouting liquid into the structural crack through a grouting device by using a pressure pump;
G. dismantling and post-treating the grouting device: and after grouting is finished, removing the grouting device, repairing and flattening the installation position of the grouting device by using a quick-setting cement-based material, and polishing and flattening the sealing layer on the surface of the structural crack after curing for 24 hours.
2. A method for treating a crack of an underground structure as claimed in claim 1, wherein in the step E: the quick-setting cement-based material consists of a part A1 and a part B1; the part A1 consists of 70-75 parts by weight of P.O52.5-grade ordinary portland cement and 25-30 parts by weight of water;
the part B1 comprises 60-72 parts by weight of silica fume, 20-32 parts by weight of water, 6-10 parts by weight of aluminum sulfate, 0.1-0.2 part by weight of sodium chloride and 0.01-0.02 part by weight of triethanolamine;
the mass ratio of the part A1 to the part B1 is 1-1.5: 1.
3. A method for treating a crack leak in an underground structure according to claim 2, wherein in step E: the grouting device is used as a central point, a water drainage stop valve on the grouting device is opened, the surface of the groove is cleaned, then the A1 part and the B1 part of the quick-setting cement-based material are uniformly mixed and smeared on the upper surface of the groove, pressure is applied to ensure the compactness of a sealing layer, and the sealing treatment of the surface of the groove is carried out from the farthest end of a structural crack to the central point during sealing.
4. A method for treating a crack leak in an underground structure according to claim 1, wherein in step F: after the joint sealing is finished, closing the water drainage stop valve, connecting a slurry outlet pipeline of the pressure pump with a grouting device installed at the intersection of the structural crack, opening the grouting stop valve, pressing clean water in, and checking the tightness and the grouting property of a grouting channel; when the water yield of the injected structural crack is more than or equal to 15L/min in the original state, injecting water plugging by clay cement paste; when the water yield of the injected structure crack is less than 15L/min in the original state, injecting water plugging by using epoxy resin slurry; the final pressure value of the grouting is 1.5 times of the hydrostatic pressure value of the construction position.
5. A method for treating a crack leak in an underground structure according to claim 4, wherein in the step F: the clay cement paste consists of 80-90 parts by weight of clay paste, 8.5-15 parts by weight of P.O42.5 grade ordinary portland cement and 1.5-5 parts by weight of water glass.
6. A method for treating a crack leak in an underground structure according to claim 4, wherein in the step F: the epoxy resin slurry consists of an A2 part and a B2 part, wherein the A2 part consists of 85-88 parts by weight of epoxy resin and 12-15 parts by weight of dibutyl phthalate; the part B2 consists of 15-40 parts by weight of T-31 curing agent, 57-84.9 parts by weight of dibutyl phthalate and 0.1-3 parts by weight of DMP-30; the mass ratio of the part A2 to the part B2 is 1-2: 1.
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| CN113062207B (en) * | 2021-04-14 | 2022-03-11 | 浙江大学 | Novel repairing method for bridge pier cracks immersed under water |
| CN114458045B (en) * | 2022-03-09 | 2023-06-13 | 鞍山益安房屋修缮有限责任公司 | Grouting blocking method and curved grouting needle for hard ornament building window water leakage |
| CN115059057A (en) * | 2022-08-01 | 2022-09-16 | 中铁一局集团有限公司 | Comprehensive treatment construction method for tunnel interval track bed open joint defect |
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