CN114808680B - Open rib steel bridge deck pavement structure and preparation method thereof - Google Patents
Open rib steel bridge deck pavement structure and preparation method thereof Download PDFInfo
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- CN114808680B CN114808680B CN202210431924.1A CN202210431924A CN114808680B CN 114808680 B CN114808680 B CN 114808680B CN 202210431924 A CN202210431924 A CN 202210431924A CN 114808680 B CN114808680 B CN 114808680B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of steel bridge deck pavement, in particular to an open rib steel bridge deck pavement structure and a preparation method thereof, wherein the open rib steel bridge deck pavement structure comprises a hogging moment position pavement structure and a positive bending moment position pavement structure, the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped crossing manner, and the positive bending moment position pavement structure is arranged between two hogging moment position pavement structures which are arranged in parallel; the hogging moment position paving structure is respectively an epoxy ESMA upper layer, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer and an R-S independent super waterproof bonding layer from top to bottom; the invention enhances the high-temperature heavy-load bearing capacity and the crack resistance and fatigue resistance of the open rib bridge deck and prolongs the paving service life through reasonable paving design and structural design.
Description
Technical Field
The invention relates to the technical field of steel bridge deck pavement, in particular to an open rib steel bridge deck pavement structure and a preparation method thereof.
Background
In recent years, domestic in-service steel bridge decks face severe situations including increasing traffic volume, gradually heavier vehicles and continuously prolonged service time, which causes the increase of stress amplitude and cycle times of orthotropic plates, so that the problems of bridge deck pavement and easy fatigue damage of orthotropic plates are caused, and the orthotropic steel bridge decks with open ribs are generated. According to the research of the prior literature and the preliminary finite element simulation analysis, the open rib orthotropic plate can effectively relieve the problem of weld stress damage of the traditional closed rib steel bridge deck, and prolong the paving life.
In the existing steel bridge deck pavement process, effective connection between the steel bridge deck and the steel bridge deck is realized by welding shear rivets on the steel bridge deck, however, when the rivets are welded, the steel bridge deck can be damaged to a certain extent to form a large potential safety hazard, and the setting of the pegs can also cause large influence on later maintenance.
In order to break through the bottleneck of the existing open rib steel bridge deck pavement technology, the inventor designs an open rib steel bridge deck pavement structure and a preparation method thereof based on the rich practical experience and professional knowledge of the design and manufacture of the product for many years and by matching with the application of mechanics, and designs an open rib steel bridge deck pavement structure, prolongs the service life of a pavement steel bridge deck and delays the fatigue of the steel bridge deck.
Disclosure of Invention
The invention aims at providing a steel bridge deck pavement structure suitable for an open rib bridge deck based on the concept of integrated design of the bridge deck, so that the steel bridge deck pavement structure has high-temperature heavy-load bearing capacity and anti-cracking and anti-fatigue performance pavement bearing capacity, the pavement material performance improvement and construction technology is researched, the pavement service life is prolonged, the fatigue of a steel bridge deck is delayed, and references are provided for the open rib bridge deck pavement.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides an open rib steel bridge deck pavement structure, which comprises a hogging moment position pavement structure and a positive bending moment position pavement structure, wherein the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped cross manner, and the positive bending moment position pavement structure is arranged between two hogging moment position pavement structures which are arranged in parallel; according to load response analysis, the orthotropic steel bridge deck plate has a negative bending moment at the position above the open rib under the action of the load of the vehicle, a positive bending moment at the position above the two open ribs, and the positions of the positive and negative bending moments are stressed differently under the repeated action of the vehicle, so that the requirements on the paving structure are different. Specifically, the pavement material of the upper layer at the position of the hogging moment needs to be considered to have stronger bending and pulling resistance, the pavement material of the lower layer needs to have higher follow-up performance on the steel plate, and the pavement material of the lower layer needs to have stronger bending and pulling resistance at the position of the positive bending moment, and meanwhile, the problem of the anti-skid performance of the upper layer of the pavement structure needs to be considered.
The hogging moment position pavement structure is composed of an epoxy ESMA upper layer, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer and an R-S independent super waterproof bonding layer from top to bottom. Because the open rib produces the hogging moment, in order to keep lower floor and steel sheet deformation unanimity, set up LPGA light high performance pouring type asphalt concrete in the lower floor of the hogging moment position pavement structure of bridge floor, guarantee good steel sheet deformation follow-up nature, the upper strata adopts epoxy ESMA, effectively resists the tired that the repetitive effect brought, and possesses sufficient antiskid ability.
The positive bending moment position paving structure is respectively an epoxy ESMA upper layer, ERB resin bonding oil, an HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer and an R-S independent super waterproof bonding layer from top to bottom. The HRAC ultra-high toughness fast-curing epoxy resin concrete layer is arranged on the lower layer of the pavement structure at the position of the positive bending moment of the bridge deck, has high modulus, better crack resistance toughness, fatigue resistance and high-temperature heavy load bearing capacity, can bear repeated bending and pulling actions under the positive bending moment, and adopts the epoxy ESMA functional pavement layer on the upper layer to ensure the skid resistance of the pavement surface.
The negative bending moment position pavement structure is an open rib bridge deck, and the positive bending moment position pavement structure is arranged between two open rib bridge decks in parallel; the hogging moment position pavement structure and the positive bending moment position pavement structure are arranged on the steel bridge deck in a crossing mode, meanwhile, the upper surface layer is paved by using the same epoxy ESMA, separation of the hogging moment position pavement structure and the positive bending moment position pavement structure is avoided, the bonding strength between the hogging moment position pavement structure and the positive bending moment position pavement structure is guaranteed, cooperation of the hogging moment position pavement structure and the positive bending moment position pavement structure is achieved, pavement stress effect can be effectively improved, and pavement disease is reduced.
Preferably, the total pavement thickness of the hogging moment position pavement structure is 6 cm-8 cm, wherein the layer thickness of the lower layer of the LPGA light high-performance pouring type asphalt concrete is 3 cm-4 cm, the layer thickness of the upper layer of the epoxy ESMA is 3 cm-4 cm, ERB resin bonding oil is used for bonding the upper layer of the epoxy ESMA and the lower layer of the LPGA light high-performance pouring type asphalt concrete, the bonding performance of the upper layer and the lower layer is enhanced, and the R-S independent super waterproof bonding layer is used for bonding the lower layer of the LPGA light high-performance pouring type asphalt concrete and the orthotropic steel bridge deck, so that the waterproof and rust prevention of the opening rib orthotropic steel bridge deck is effectively ensured, the pavement is kept to have extremely strong deformation follow performance on the steel bridge deck, and the fatigue resistance of the upper layer of the pavement is excellent.
Preferably, the total pavement thickness of the positive bending moment position pavement structure is 6 cm-8 cm, wherein the layer thickness of the lower layer of the HRAC ultra-high toughness fast-curing epoxy resin concrete is 3 cm-4 cm, the layer thickness of the upper layer of the epoxy ESMA is 3 cm-4 cm, ERB resin bonding oil is used for bonding the upper layer of the epoxy ESMA and the lower layer of the HRAC ultra-high toughness fast-curing epoxy resin concrete, and the R-S independent super waterproof bonding layer is used for bonding the lower layer of the HRAC ultra-high toughness fast-curing epoxy resin concrete and the orthotropic steel bridge deck. The waterproof and antirust performance of the steel bridge deck plate with orthotropic opening ribs is effectively guaranteed, interlayer bonding performance and deformation cooperativity are improved, and the fatigue resistance of the paved lower surface layer is excellent.
Preferably, the lower layer of the LPGA light high-performance cast asphalt concrete comprises the following components in parts by weight: 7-10 parts of cementing material, 60-73 parts of aggregate, 1-10 parts of light coarse aggregate, 20-30 parts of mineral powder, 1-3 parts of high-strength composite fiber and 0.3-1 part of additive; the cementing material consists of common modified asphalt and natural asphalt according to the mass ratio of 3:1-4:1. The high-strength composite fiber is uniformly dispersed in the mixture, so that the strength, the modulus, the high-temperature stability and other performances of the high-strength composite fiber can be improved, the high-strength composite fiber comprises carbon fibers with the length of 12mm and steel fibers with the length of 10mm, wherein the mass ratio of the carbon fibers to the steel fibers is 1:1 to 2.5; the additive is a surfactant; the surfactant warm mixing agent can improve the internal structure of asphalt, has the effects of reducing viscosity and toughening, and can ensure the deformation follow-up property of a steel bridge deck with good laying structure and reduce stress damage by the proportion when being bonded together by cementing materials to play a role.
Preferably, the aggregate, the light coarse aggregate and the mineral powder form a mixture, the cementing material accounts for 9% of the mixture, and the cementing material consists of common modified asphalt and natural asphalt according to a mass ratio of 3:1-4:1. The modified asphalt is SBS modified asphalt and the like, and the natural asphalt is one or more of lake asphalt or rock asphalt; the aggregate is basalt aggregate, and the mineral powder is limestone mineral powder. The light coarse aggregate is one or a mixture of a plurality of porous tuff, fly ash ceramsite or shale ceramsite; the apparent density of the light coarse aggregate is 65% -70% lower than that of the common aggregate, and after uniform stirring, the light coarse aggregate floats on the surface due to the density difference of different aggregate types, and the common aggregate is distributed at the bottom position and is unevenly distributed in the paving thickness direction. The top surface light coarse aggregate can strengthen the friction force between the upper layer and the lower layer, strengthen the bonding effect, and fully exert the deformation follow-up property on the steel plate by the bottom surface common aggregate and mineral powder.
Preferably, basalt crushed stone is spread on the lower layer of the laid LPGA light high-performance pouring asphalt concrete, the particle size of the crushed stone is 13 mm-16 mm, and the spreading amount is 8-10 kg/m 2 The method comprises the steps of carrying out a first treatment on the surface of the Preliminary rolling is carried out when the broken stone is not sinking under the action of self weight, so that the coordination deformation capacity of the upper layer and the lower layer is enhanced.
Preferably, the HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer comprises the following components in parts by weight: 70-80 parts of glycidyl ether epoxy resin, 10-15 parts of maleic anhydride curing agent, 2-10 parts of triglycidyl propyl ether diluent and 3-10 parts of acrylate rubber adhesive. The resin curing is to make the thermosetting resin generate irreversible change process through chemical reactions such as condensation, ring closure, addition or catalysis, and the glycidyl ether epoxy resin prepared by the reaction of the polyhydric phenol or the polyhydric alcohol and the epichlorohydrin can realize quick curing under the action of the maleic anhydride curing agent and crosslink to generate a reticular structure, and has higher modulus. The effect of the trioxypropylene propyl ether diluent is to reduce the viscosity of the adhesive, so that the adhesive has good penetrating power, thereby prolonging the service life of the adhesive and facilitating construction; the acrylate rubber adhesive has the function of enabling materials with different interfaces, such as aggregate, to interact together through contact.
Preferably, the HRAC ultra-high toughness fast-setting epoxy resin concrete lower layer further comprises mineral aggregate, wherein the mineral aggregate is prepared by grading aggregate and mineral powder, and the proportion of the mineral aggregate is 1# (9.5-13.2 mm): 2# (4.75-9.5 mm): 3# (2.36-4.75 mm): 4# (0.6-2.36 mm): 5# (0 to 0.6 mm): mineral powder=23:22:23:15:10:7, whetstone ratio 7.5%. Mineral aggregate plays a role in skeleton support in HRAC; by adopting the proportion, the materials can be quickly solidified at normal temperature, and the traffic jam caused by closed construction is relieved. Meanwhile, the HRAC ultrahigh-toughness quick-fixing epoxy resin concrete lower layer belongs to resin materials, has higher modulus and strength at high temperature compared with asphalt materials, can bear the repeated bending and pulling action of the lower layer under positive bending moment, and has crack resistance toughness, fatigue resistance and high-temperature heavy load bearing capacity.
Preferably, the R-S independent super waterproof bonding layer comprises three layers, namely an RBchip resin bonding layer, a basalt crushed stone layer and an RM bonding layer from bottom to top. Through the compound use of RBchip resin glued layer, basalt gravel layer and RM adhesive layer, improve the lower floor with bond strength between the orthotropic steel bridge deck, the function of preventing infiltration is not impaired simultaneously, plays the effect of effectively protecting steel bridge deck.
Preferably, the RBchip resin bonding layer comprises the following components in parts by weight: 65-75 parts of bisphenol A epoxy resin, 14-22 parts of maleic anhydride curing agent, 6-7 parts of butyl glycidyl ether reactive diluent and 5-6 parts of quartz water-based powder reinforcing agent, wherein the rapid curing of the bisphenol A epoxy resin is realized under the action of the maleic anhydride curing agent, and the viscosity of the RBchip resin bonding layer is reduced by using the butyl glycidyl ether reactive diluent, so that the RBchip resin bonding layer has good impregnating capacity. The quartz water-based powder reinforcing agent is tightly combined with bisphenol A epoxy resin, so that the mechanical property of the quartz water-based powder reinforcing agent is improved; the dosage of the basalt crushed stone layer is 0.4 to the whole0.5kg/m 2 The RM adhesive layer comprises the following components in parts by weight: 70-80 parts of glycidyl ether epoxy resin, 10-15 parts of maleic anhydride curing agent, 2-10 parts of triglycidyl propyl ether diluent and 3-10 parts of acrylate rubber adhesive, wherein the components of the RM adhesive layer are similar to those of HRAC ultra-high toughness fast-curing epoxy resin concrete in formula, and the RM adhesive layer does not contain aggregate. The propylene oxide propyl ether diluent reduces the viscosity of the acrylate rubber adhesive, so that the acrylate rubber adhesive has good impregnating capacity, thereby prolonging the service life of the acrylate rubber adhesive and facilitating construction.
Preferably, the ERB resin bonding oil adopts a normal temperature epoxy adhesive, the breaking elongation of the normal temperature epoxy adhesive is more than or equal to 100 percent, the breaking strength is more than or equal to 1.2MPa, and the coating weight is 0.4-0.6 kg/m 2 . The coating amount can be more uniform in this range, and the adhesive force is the strongest.
Preferably, the epoxy ESMA upper layer comprises the following components in parts by weight: 6-8 parts of cementing material, 80-85 parts of basalt aggregate and 7-14 parts of polyethylene terephthalate additive; the cementing material consists of composite epoxy resin and rubber modified asphalt with the mass ratio of 1:1-1.4. The epoxy ESMA upper layer mixture has more coarse aggregates, mineral powder and asphalt, less fine aggregates and high requirements on material quality. Different from the conventional SMA pavement, the anti-skid composite pavement has the advantages of effectively resisting fatigue caused by repeated actions, having enough anti-skid capability and ensuring the anti-skid performance of the pavement surface.
Preferably, the composite epoxy resin comprises the following components in parts by weight: 60-70 parts of glycidyl ether epoxy resin, 15-25 parts of maleic anhydride curing agent, 5-10 parts of triglycidyl propyl ether diluent and 5-10 parts of acrylate rubber adhesive. The glycidyl ether epoxy resin can be rapidly cured under the action of the maleic anhydride curing agent, is crosslinked to form a net structure, and has higher modulus. The propylene oxide propyl ether diluent reduces the viscosity of the acrylate rubber adhesive, so that the acrylate rubber adhesive has good impregnating capacity. The composite epoxy resin is used as cementing material to prepare the epoxy ESMA upper layer, so that the cementing material is filled in the skeleton gaps of the gap grading coarse aggregate to form a compact asphalt mixture, and the pavement has the advantages of skid resistance, wear resistance, compactness, durability and the like.
The second main object of the invention is to provide a preparation method of an open rib steel bridge deck pavement structure, which comprises the following operation steps:
s1: sand blasting and rust removing are carried out on the steel bridge deck, the cleanliness is more than Sa2.5-Sa3.0, the roughness is 60-100 mu m, and the double-component polyamine cured epoxy zinc-rich anti-corrosion primer is sprayed; the sand blasting rust removal treatment is carried out on the upper surface of the steel bridge deck, and the sand blasting rust removal treatment has the effects of improving the cleanliness of the steel bridge deck, reducing bonding failure caused by the existence of pollutants, increasing the roughness of the metal surface and improving the bonding strength between the steel bridge deck and the metal surface. The epoxy zinc-rich primer is a high-performance paint, has tough paint film, wear resistance, good adhesive force, rust resistance and strong corrosion resistance, and can be used as a material of the corrosion-resistant bonding layer to protect the bottom steel bridge deck to the greatest extent, so that the epoxy zinc-rich primer can adapt to various strong corrosion environments. In addition, the epoxy zinc-rich primer has the advantages of good heat resistance, excellent static conductivity and the like compared with other primers;
s2: cleaning the surface of the epoxy zinc-rich anti-corrosion primer, and coating an R-S independent super waterproof bonding layer on the surface of the epoxy zinc-rich anti-corrosion primer, and synchronously spreading broken stone with the dosage of 0.4-0.5 kg/m 2 Placing a construction mold after preserving the health for 1.5 days at normal temperature; the R-S independent super waterproof bonding material paved on the steel bridge deck has waterproof performance, can prevent accumulated water on the road surface from contacting the steel bridge deck, reduces the corrosion probability of the steel bridge deck, and ensures that part of solidified broken stone particles is exposed to form a rough surface by synchronously spreading broken stone, thereby effectively enhancing the interlayer physical occlusion connection capability and further increasing the effective bonding performance of an interlayer interface of the structure;
s3: arranging templates to distinguish two paving structures of the hogging moment position paving structure and the positive bending moment position paving structure, wherein a template system consists of a plurality of templates with the heights consistent with the lower layers of the paving structures, the width of the template system is the paving width, the length of the template system is the length of one-time paving, the height of the templates is adjusted according to the thickness of the lower layers of the paving, and the width and the height of the templates are properly adjusted according to the site construction capability; the adoption of the template can ensure that the performances of the LPGA light high-performance cast asphalt concrete and the HRAC ultra-high toughness fast-curing epoxy resin concrete meet the quality requirements, and the surface flatness is easy to control;
s4: preparing LPGA light high-performance pouring asphalt concrete, adding aggregate, mineral powder, light coarse aggregate and high-strength composite fiber in the LPGA light high-performance pouring asphalt concrete into a high-temperature mixing pot at about 260 ℃ according to a certain sequence, dry-mixing for 50s, adding an additive into a cementing material, uniformly mixing, adding into a mixing pot, mixing for 1h at about 260 ℃, obtaining the LPGA light high-performance pouring asphalt mixture after mixing, transporting to the site, paving at a pavement structure mark at a negative bending moment position of a template system, controlling pavement thickness by using a designed template system, and guaranteeing paving surface flatness; the pouring of the LPGA light high-performance pouring asphalt concrete should be continuously performed and completed, so that the skinning of the exposed surface or the formation of cold joints are avoided;
S5: wrapping broken stone with polymer composite modified asphalt, wherein the asphalt consumption is 0.3-0.6%, the particle size of premixed asphalt broken stone is 13-16 mm, and the broken stone cooled after premixed is kept in a dispersed state; spreading a certain amount of broken stone on the LPGA light high-performance pouring asphalt concrete, carrying out preliminary rolling when the broken stone is not sinking under the self-weight effect, and removing the template system after maintenance is finished;
s6: preparing HRAC ultra-high toughness fast-curing epoxy resin concrete, adopting a mixing station to dry mix aggregate and mineral powder in the HRAC ultra-high toughness fast-curing epoxy resin concrete for 30s, and after adding the resin mixture, carrying out wet mixing for 90s. After the high-toughness HRAC cold-mixed epoxy resin concrete is transported to the site, paving the high-toughness HRAC cold-mixed epoxy resin concrete at gaps among the hogging moment position paving structures, controlling the paving thickness by utilizing the height of the paved hogging moment position paving structures, finishing kneading for 6-8 times within 25min by adopting a rubber-tire road roller for compaction, and then curing for 1.5-2 days at normal temperature;
s7: in LPGA light high-performance casting asphalt concrete and HRAC ultra-high toughness fast-settingERB resin adhesive oil is coated on the upper surface of the epoxy resin concrete, and the coating weight is 0.4-0.6 kg/m 2 ；
S8: preparing an epoxy ESMA upper layer, heating basalt aggregate to 210 ℃ by adopting a mixing station, carrying out dry mixing for 10s, adding a polyethylene terephthalate additive and a cementing material, and heating to 170 ℃ and carrying out wet mixing for 55s. And paving the mixed mixture on the surface of the paving lower layer by adopting asphalt paving equipment. And adopting static pressure of the double-steel-wheel road roller for 1 time to finish initial compaction, adopting a vibratory road roller for 2-3 times to finish back compaction, and finally adopting the static pressure of the double-steel-wheel road roller for 1-2 times to ensure the road surface to be smooth.
Through the technical scheme, the invention has the beneficial effects that:
(1) The invention provides a pavement structure of an LPGA light high-performance pouring type asphalt concrete lower layer and an epoxy ESMA functional upper layer at a position pavement structure (an opening rib) bearing a hogging moment by analyzing the stress characteristics of an opening rib bridge deck system. The pavement structure of the HRAC ultra-high toughness cold-mix epoxy concrete lower layer and the epoxy ESMA functional upper layer is arranged at the position of the pavement structure (between two opening ribs) bearing the positive bending moment. Meanwhile, the R-S independent super waterproof bonding layer paved at one step on the bottom layer can transfer the weak interface between layers from the surface of the steel bridge deck to the paving layer and the waterproof layer, so that the functions of water seepage prevention and effective protection of the steel bridge deck are achieved. Each layer of division of labor is clear, and two structures realize the cooperation, can effectively improve the effect of the atress of mating formation, provide one kind and be applicable to open rib steel bridge deck system long-life scheme of mating formation.
(2) The LPGA light high-performance pouring asphalt concrete surface layer is utilized to enhance interlayer shearing resistance by utilizing density difference among aggregates in the position paving structure bearing the hogging moment, the deformation tracking effect is fully exerted, and the weight reduction effect can be achieved under the condition of keeping the same bearing capacity. And the bridge deck pavement rigidity is improved through the epoxy ESMA upper layer, bending and pulling under the repeated action of load are born, and the fatigue resistance of the pavement structure is improved.
(3) The HRAC ultra-high toughness fast-curing epoxy resin concrete which is more matched with the rigidity of the steel bridge deck plate is utilized in the pavement structure at the position bearing the positive bending moment, so that the relative deformation existing between different structures is reduced, the repeated bending and pulling action of the lower layer under the action of the positive bending moment can be borne, the pavement structure has good fatigue resistance, and the high-temperature stability of the HRAC ultra-high toughness fast-curing epoxy resin concrete is utilized, so that the high-temperature heavy load bearing capacity of the pavement structure is ensured. And then the skid resistance of the paving surface is ensured through the epoxy ESMA upper layer.
(4) The invention uses R-S independent super waterproof bonding layer to coat the surface of the epoxy zinc-rich anti-corrosion primer, and is used for bonding the paving lower surface layer and the orthotropic steel bridge deck into a whole. Besides the function of adhesion, the waterproof effect can be achieved, through the composite use of the RBchip resin adhesive layer, the basalt crushed stone layer and the RM adhesive layer, the adhesion strength between the paved lower layer and the orthotropic steel bridge deck is improved, the shearing resistance between the paved lower layer and the orthotropic steel bridge deck with the opening ribs is improved, and the interlayer weak interface can be transferred from the surface of the steel bridge deck to the paved layer and the waterproof layer under the high-temperature adverse working condition, so that the waterproof layer is not damaged, the function of preventing water seepage is not damaged, and the function of effectively protecting the steel bridge deck is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic structural view of an open rib steel bridge deck pavement structure in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a paving cross section of an open rib steel bridge deck paving structure in an embodiment of the invention;
FIG. 3 is an enlarged view of a portion of the invention at A in FIG. 2;
FIG. 4 is a schematic view of an open rib steel bridge deck construction form in an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for preparing an open rib steel bridge surface in an embodiment of the invention.
Reference numerals: 01. a steel bridge deck; 02. an opening rib; 03. a hogging moment position paving structure; 04. a positive bending moment position paving structure; 05. paving a template; 11. an epoxy ESMA upper layer; 12. ERB resin bonding oil; 13. LPGA light high-performance casting asphalt concrete; 14. R-S independent super waterproof bonding layer; 15. HRAC ultra-high toughness fast-setting epoxy resin concrete lower layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In a specific embodiment of the present invention, the sources of each commercially available material are as follows:
SBS modified asphalt: new Material Co Ltd in Jiangsu Zhongyi passage way
Lake asphalt: new Material Co Ltd in Jiangsu Zhongyi passage way
Rock asphalt: new Material Co Ltd in Jiangsu Zhongyi passage way
Basalt aggregate: jiangsu Mao Di group Co., ltd
Limestone mineral powder: tongzhou district Xingdong Ling building material manager
Carbon fiber: science and technology Co.Ltd
Steel fiber: science and technology Co.Ltd
Sodium stearyl sulfate: science and technology Co.Ltd
Porous tuff: jiangsu Mao Di group Co., ltd
Fly ash ceramsite: jiangsu Mao Di group Co., ltd
Shale ceramsite: jiangsu Mao Di group Co., ltd
Glycidyl ether epoxy resin: science and technology Co.Ltd
Maleic anhydride curing agent: science and technology Co.Ltd
Propylene oxide propyl ether diluent: science and technology Co.Ltd
Acrylate rubber adhesive: science and technology Co.Ltd
Bisphenol a epoxy resin: science and technology Co.Ltd
Maleic anhydride curing agent: science and technology Co.Ltd
Butyl glycidyl ether reactive diluent: science and technology Co.Ltd
Quartz aqueous powder reinforcing agent: science and technology Co.Ltd
Normal temperature epoxy adhesive: science and technology Co.Ltd
Polyethylene terephthalate additives: science and technology division of the middle road department.
Example 1
The open rib steel bridge deck pavement structure comprises a hogging moment position pavement structure and a positive bending moment position pavement structure, wherein the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped crossing manner, and the positive bending moment position pavement structure is arranged between the two hogging moment position pavement structures which are arranged in parallel;
the hogging moment position pavement structure comprises an epoxy ESMA upper layer with the thickness of 3cm, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer with the thickness of 4cm and an R-S independent super waterproof bonding layer from top to bottom;
The positive bending moment position pavement structure comprises an epoxy ESMA upper layer with the thickness of 3cm, ERB resin bonding oil, an HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer with the thickness of 4cm and an R-S independent super waterproof bonding layer from top to bottom.
Preferably, the LPGA lightweight high-performance cast asphalt concrete includes: 8 parts of cementing material, 60 parts of aggregate, 6 parts of light coarse aggregate, 22 parts of mineral powder, 2 parts of high-strength composite fiber and 0.5 part of additive. The cementing material consists of SBS modified asphalt and rock asphalt according to a mass ratio of 3:1, wherein aggregate is formed by crushing basalt, light coarse aggregate is shale ceramsite, and mineral powder is limestone mineral powderThe method comprises the steps of carrying out a first treatment on the surface of the The high-strength composite fiber comprises carbon fiber with the length of 12mm and steel fiber with the length of 10mm, wherein the mass ratio of the carbon fiber to the steel fiber is 1:1.5; the additive is sodium octadecyl sulfate. LPGA light high-performance casting asphalt concrete layer spreading basalt macadam with 10kg/m spreading amount 2 。
Preferably, the resin mixture in the HRAC ultra-high toughness fast-curing epoxy resin concrete comprises the following components in parts by weight: 75 parts of glycidyl ether epoxy resin, 12 parts of maleic anhydride curing agent, 8 parts of trioxypropane propyl ether diluent and 7 parts of acrylate rubber adhesive. Mineral aggregate proportion is 1# (9.5-13.2 mm): 2# (4.75-9.5 mm): 3# (2.36-4.75 mm): 4# (0.6-2.36 mm): 5# (0 to 0.6 mm): mineral powder=23:22:23:15:10:7, whetstone ratio 7.5%.
Preferably, the R-S independent super waterproof bonding layer comprises three layers, namely an RBchip resin bonding layer, a basalt crushed stone layer and an RM bonding layer from bottom to top.
Preferably, the RBchip resin bonding layer comprises the following components in parts by weight: 70 parts of bisphenol A epoxy resin, 18 parts of maleic anhydride curing agent, 6 parts of butyl glycidyl ether reactive diluent and 6 parts of quartz water-based powder reinforcing agent, wherein the spreading amount of basalt crushed stone layer is 0.4kg/m 2 . The RM adhesive layer comprises the following components in parts by weight: 72 parts of glycidyl ether epoxy resin, 11 parts of maleic anhydride curing agent, 5 parts of triglycidyl propyl ether diluent and 5 parts of acrylate rubber adhesive.
Preferably, the ERB resin bonding oil adopts a normal temperature epoxy adhesive, the fracture elongation of the normal temperature epoxy adhesive is more than or equal to 100 percent, the fracture strength is more than or equal to 1.2MPa, and the coating weight is 0.5kg/m 2 。
Preferably, the epoxy ESMA upper layer comprises the following components in parts by weight: 6 parts of cementing material, 84 parts of basalt aggregate and 10 parts of polyethylene terephthalate additive; the cementing material is prepared from composite epoxy resin and rubber modified asphalt according to a ratio of 1:1.2, wherein the composite epoxy resin comprises the following components in parts by weight: 65 parts of glycidyl ether epoxy resin, 20 parts of maleic anhydride curing agent, 8 parts of trioxypropane propyl ether diluent and 7 parts of acrylate rubber adhesive. The basalt aggregate comprises coarse and fine aggregates, wherein the aggregate proportion is 1# (5-10 mm): 2# (3-5 mm): 3# (1-3 mm): 4# (0.075-1 mm) =56:8:27:9.
As shown in fig. 5, the method for preparing the open rib steel bridge deck pavement structure in the embodiment of the invention comprises the following operation steps:
s1: sand blasting and rust removing are carried out on the steel bridge deck, the cleanliness reaches more than Sa2.5, the roughness reaches 80 mu m, and a double-component polyamine cured epoxy zinc-rich anti-corrosion primer is sprayed;
s2: cleaning the surface of the epoxy zinc-rich anti-corrosion primer, and coating an R-S independent super waterproof bonding layer on the surface of the epoxy zinc-rich anti-corrosion primer, and synchronously spreading broken stone with the dosage of 0.4kg/m 2 Placing a construction mold on the surface of the epoxy zinc-rich anti-corrosion primer after curing for 1.5 days at normal temperature;
s3: as shown in fig. 4, the construction mold layout template is used for distinguishing two pavement structures, namely a hogging moment position pavement structure and a positive bending moment position pavement structure;
s4: preparing LPGA light high-performance pouring asphalt concrete, paving the asphalt concrete at a negative bending moment position pavement structure mark of a template system after the asphalt concrete is transported to the site, controlling the pavement thickness to be 4cm by using the designed template system in a manual pavement mode, and ensuring the pavement surface to be smooth;
s5: the broken stone is wrapped by SBS modified asphalt, the using amount of the SBS modified asphalt is 0.5%, the particle size of the premixed asphalt broken stone is 16mm, and the broken stone cooled after premixed is kept in a dispersed state; spreading a certain amount of broken stone on the LPGA light high-performance pouring asphalt concrete layer in a manual mode, carrying out manual preliminary rolling when the broken stone is not sinking under the action of self weight, and removing a template system after maintenance is finished;
S6: preparing HRAC ultra-high toughness fast-curing epoxy resin concrete, paving the HRAC ultra-high toughness cold-mix epoxy resin concrete at a gap between hogging moment position paving structures in a manual mode, and controlling paving thickness to be 4cm by using the height of the paved hogging moment position paving structures. Kneading for 8 times by adopting a 26t rubber-tired roller within 25min for compaction, and then curing for 2 days at normal temperature;
s7: coating ERB resin bonding oil on the lower layer of the LPGA light high-performance pouring asphalt concrete and the upper surface of the lower layer of the HRAC ultra-high toughness fast-curing epoxy resin concrete; the coating weight was 0.5kg/m 2 ；
S8: preparing an epoxy ESMA upper layer, transporting to the site, paving the epoxy ESMA upper layer on a lower layer coated with ERB resin bonding oil, adopting a double-steel-wheel road roller static pressure for 1 time to finish initial compaction, adopting a vibratory road roller to roll for 3 times to finish re-compaction, and finally adopting the double-steel-wheel road roller static pressure for 2 times to ensure that the road surface is smooth, and preserving the health for 7 days to open traffic after compaction.
Example 2
The open rib steel bridge deck pavement structure comprises a hogging moment position pavement structure and a positive bending moment position pavement structure, wherein the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped crossing manner, and the positive bending moment position pavement structure is arranged between the two hogging moment position pavement structures which are arranged in parallel;
The hogging moment position pavement structure comprises an epoxy ESMA upper layer with the thickness of 3cm, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer with the thickness of 3cm and an R-S independent super waterproof bonding layer from top to bottom;
the positive bending moment position pavement structure comprises an epoxy ESMA upper layer with the thickness of 3cm, ERB resin bonding oil, an HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer with the thickness of 3cm and an R-S independent super waterproof bonding layer from top to bottom.
Preferably, the LPGA lightweight high-performance cast asphalt concrete includes: 9 parts of cementing material, 73 parts of aggregate, 10 parts of light coarse aggregate, 27 parts of mineral powder, 2 parts of high-strength composite fiber and 0.4 part of additive. The cementing material consists of SBS modified asphalt and rock asphalt according to a mass ratio of 4:1, wherein aggregate is formed by crushing basalt, light coarse aggregate is shale ceramsite, and mineral powder is limestone mineral powder; the high-strength composite fiber comprises carbon fiber with the length of 12mm and steel fiber with the length of 10mmThe mass ratio of dimension is 1:2.5; the additive is sodium octadecyl sulfate. LPGA light high-performance pouring asphalt concrete layer spreading basalt macadam with spreading amount of 8kg/m 2 。
Preferably, the resin mixture in the HRAC ultra-high toughness fast-curing epoxy resin concrete comprises the following components in parts by weight: 70 parts of glycidyl ether epoxy resin, 10 parts of maleic anhydride curing agent, 5 parts of trioxypropane propyl ether diluent and 10 parts of acrylate rubber adhesive. Mineral aggregate proportion is 1# (9.5-13.2 mm): 2# (4.75-9.5 mm): 3# (2.36-4.75 mm): 4# (0.6-2.36 mm): 5# (0 to 0.6 mm): mineral powder=23:22:23:15:10:7, whetstone ratio 7.5%.
Preferably, the R-S independent super waterproof bonding layer comprises three layers, namely an RBchip resin bonding layer, a basalt crushed stone layer and an RM bonding layer from bottom to top.
Preferably, the RBchip resin bonding layer comprises the following components in parts by weight: 70 parts of bisphenol A epoxy resin, 18 parts of maleic anhydride curing agent, 6 parts of butyl glycidyl ether reactive diluent and 6 parts of quartz water-based powder reinforcing agent, wherein the spreading amount of basalt crushed stone layer is 0.5kg/m 2 . The RM adhesive layer comprises the following components in parts by weight: 72 parts of glycidyl ether epoxy resin, 11 parts of maleic anhydride curing agent, 5 parts of triglycidyl propyl ether diluent and 5 parts of acrylate rubber adhesive.
Preferably, the ERB resin bonding oil adopts a normal temperature epoxy adhesive, the fracture elongation of the normal temperature epoxy adhesive is more than or equal to 100 percent, the fracture strength is more than or equal to 1.2MPa, and the coating weight is 0.5kg/m 2 。
Preferably, the epoxy ESMA upper layer comprises the following components in parts by weight: 8 parts of cementing material, 80 parts of basalt aggregate and 12 parts of polyethylene terephthalate additive; the cementing material is prepared from composite epoxy resin and rubber modified asphalt according to a ratio of 1:1.4, wherein the composite epoxy resin comprises the following components in parts by weight: 60 parts of glycidyl ether epoxy resin, 25 parts of maleic anhydride curing agent, 5 parts of trioxypropane propyl ether diluent and 10 parts of acrylate rubber adhesive. The basalt aggregate comprises coarse and fine aggregates, wherein the aggregate proportion is 1# (5-10 mm): 2# (3-5 mm): 3# (1-3 mm): 4# (0.075-1 mm) =56:8:27:9.
As shown in fig. 5, the method for preparing the open rib steel bridge deck pavement structure in the embodiment of the invention comprises the following operation steps:
s1: sand blasting and rust removing are carried out on the steel bridge deck, the cleanliness reaches more than Sa2.5, the roughness reaches 100 mu m, and a double-component polyamine cured epoxy zinc-rich anti-corrosion primer is sprayed;
S2: cleaning the surface of the epoxy zinc-rich anti-corrosion primer, and coating an R-S independent super waterproof bonding layer on the surface of the epoxy zinc-rich anti-corrosion primer, and synchronously spreading broken stone with the dosage of 0.5kg/m 2 Placing a construction mold on the surface of the epoxy zinc-rich anti-corrosion primer after curing for 1.5 days at normal temperature;
s3: as shown in fig. 4, the construction mold layout template is used for distinguishing two pavement structures, namely a hogging moment position pavement structure and a positive bending moment position pavement structure;
s4: preparing LPGA light high-performance pouring asphalt concrete, paving the asphalt concrete at a negative bending moment position paving structure mark of a template system after the asphalt concrete is transported to the site, controlling the paving thickness to be 3cm by using the designed template system in a manual paving mode, and ensuring the paving surface to be smooth;
s5: the broken stone is wrapped by SBS modified asphalt, the using amount of the SBS modified asphalt is 0.4%, the particle size of the premixed asphalt broken stone is 15mm, and the broken stone cooled after premixed is kept in a dispersed state; spreading a certain amount of broken stone on the LPGA light high-performance pouring asphalt concrete layer in a manual mode, carrying out manual preliminary rolling when the broken stone is not sinking under the action of self weight, and removing a template system after maintenance is finished;
S6: preparing HRAC ultra-high toughness fast-curing epoxy resin concrete, paving the HRAC ultra-high toughness cold-mix epoxy resin concrete at a gap between hogging moment position paving structures in a manual mode, and controlling paving thickness to be 3cm by using the height of the paved hogging moment position paving structures. Kneading for 6 times by adopting a 30t rubber-tired roller within 25min for compaction, and then curing for 2 days at normal temperature;
s7: coating ERB resin bonding oil on the lower layer of the LPGA light high-performance pouring asphalt concrete and the upper surface of the lower layer of the HRAC ultra-high toughness fast-curing epoxy resin concrete; the coating weight was 0.5kg/m 2 ；
S8: preparing an epoxy ESMA upper layer, transporting to the site, paving the epoxy ESMA upper layer on a lower layer coated with ERB resin bonding oil, adopting a double-steel-wheel road roller static pressure for 1 time to finish initial compaction, adopting a vibratory road roller to roll for 3 times to finish re-compaction, and finally adopting the double-steel-wheel road roller static pressure for 2 times to ensure that the road surface is smooth, and preserving the health for 7 days to open traffic after compaction.
Example 3
The open rib steel bridge deck pavement structure comprises a hogging moment position pavement structure and a positive bending moment position pavement structure, wherein the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped crossing manner, and the positive bending moment position pavement structure is arranged between the two hogging moment position pavement structures which are arranged in parallel;
The hogging moment position paving structure is respectively an epoxy ESMA upper layer with the thickness of 3.2cm, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer with the thickness of 3.8cm and an R-S independent super waterproof bonding layer from top to bottom;
the positive bending moment position paving structure is composed of an epoxy ESMA upper layer with the thickness of 3.2cm, ERB resin bonding oil, an HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer with the thickness of 3.8cm and an R-S independent super waterproof bonding layer from top to bottom.
Preferably, the LPGA lightweight high-performance cast asphalt concrete includes: 9 parts of cementing material, 70 parts of aggregate, 8 parts of light coarse aggregate, 22 parts of mineral powder, 1 part of high-strength composite fiber and 0.3 part of additive. The cementing material consists of SBS modified asphalt and rock asphalt according to the mass ratio of 3.5:1, wherein the aggregate is formed by crushing basalt, the light coarse aggregate is shale ceramsite, and the mineral powder is limestone mineral powder; the high-strength composite fiber comprises carbon fiber with the length of 12mm and steel fiber with the length of 10mm, wherein the mass ratio of the carbon fiber to the steel fiber is 1:2; the additive is sodium octadecyl sulfate. LPGA light high-performance pouring type asphaltSpreading basalt crushed stone on green concrete layer with spreading amount of 9kg/m 2 。
Preferably, the resin mixture in the HRAC ultra-high toughness fast-curing epoxy resin concrete comprises the following components in parts by weight: 70 parts of glycidyl ether epoxy resin, 15 parts of maleic anhydride curing agent, 6 parts of trioxypropane propyl ether diluent and 9 parts of acrylate rubber adhesive. Mineral aggregate proportion is 1# (9.5-13.2 mm): 2# (4.75-9.5 mm): 3# (2.36-4.75 mm): 4# (0.6-2.36 mm): 5# (0 to 0.6 mm): mineral powder=23:22:23:15:10:7, whetstone ratio 7.5%.
Preferably, the R-S independent super waterproof bonding layer comprises three layers, namely an RBchip resin bonding layer, a basalt crushed stone layer and an RM bonding layer from bottom to top.
Preferably, the RBchip resin bonding layer comprises the following components in parts by weight: 70 parts of bisphenol A epoxy resin, 18 parts of maleic anhydride curing agent, 6 parts of butyl glycidyl ether reactive diluent and 6 parts of quartz water-based powder reinforcing agent, wherein the spreading amount of basalt crushed stone layer is 0.5kg/m 2 . The RM adhesive layer comprises the following components in parts by weight: 70 parts of glycidyl ether epoxy resin, 10 parts of maleic anhydride curing agent, 8 parts of triglycidyl propyl ether diluent and 8 parts of acrylate rubber adhesive.
Preferably, the ERB resin bonding oil adopts a normal temperature epoxy adhesive, the fracture elongation of the normal temperature epoxy adhesive is more than or equal to 100 percent, the fracture strength is more than or equal to 1.2MPa, and the coating weight is 0.5kg/m 2 。
Preferably, the epoxy ESMA upper layer comprises the following components in parts by weight: 7 parts of cementing material, 83 parts of basalt aggregate and 10 parts of polyethylene terephthalate additive; the cementing material is prepared from composite epoxy resin and rubber modified asphalt according to a ratio of 1:1.4, wherein the composite epoxy resin comprises the following components in parts by weight: 70 parts of glycidyl ether epoxy resin, 15 parts of maleic anhydride curing agent, 6 parts of trioxypropane propyl ether diluent and 9 parts of acrylate rubber adhesive. The basalt aggregate comprises coarse and fine aggregates, wherein the aggregate proportion is 1# (5-10 mm): 2# (3-5 mm): 3# (1-3 mm): 4# (0.075-1 mm) =56:8:27:9.
As shown in fig. 5, the method for preparing the open rib steel bridge deck pavement structure in the embodiment of the invention comprises the following operation steps:
s1: sand blasting and rust removing are carried out on the steel bridge deck, the cleanliness reaches more than Sa2.5, the roughness reaches 80 mu m, and a double-component polyamine cured epoxy zinc-rich anti-corrosion primer is sprayed;
S2: cleaning the surface of the epoxy zinc-rich anti-corrosion primer, and coating an R-S independent super waterproof bonding material on the surface of the epoxy zinc-rich anti-corrosion primer, and synchronously spreading broken stone with the dosage of 0.5kg/m 2 Placing a construction mold on the surface of the epoxy zinc-rich anti-corrosion primer after curing for 1.5 days at normal temperature;
s3: as shown in fig. 4, the arrangement of the templates distinguishes two pavement structures, namely, a hogging moment position pavement structure and a positive bending moment position pavement structure;
s4: preparing LPGA light high-performance pouring asphalt concrete, paving the asphalt concrete at a negative bending moment position paving structure mark of a template system after the asphalt concrete is transported to the site, and controlling the paving thickness to be 3.8cm by using the designed template system in a manual paving mode to ensure the paving surface to be smooth;
s5: the broken stone is wrapped by SBS modified asphalt, the using amount of the SBS modified asphalt is 0.4%, the particle size of the premixed asphalt broken stone is 15mm, and the broken stone cooled after premixed is kept in a dispersed state; spreading a certain amount of broken stone on the LPGA light high-performance pouring asphalt concrete layer in a manual mode, carrying out manual preliminary rolling when the broken stone is not sinking under the action of self weight, and removing a template system after maintenance is finished;
s6: preparing HRAC ultra-high toughness fast-curing epoxy resin concrete, paving the HRAC ultra-high toughness cold-mix epoxy resin concrete at a gap between hogging moment position paving structures in a manual mode, and controlling paving thickness to be 3.8cm by using the height of the paved hogging moment position paving structures. Kneading for 7 times for compaction by adopting a 26t rubber-tyred roller within 25min, and curing for 2 days at normal temperature;
S7: under LPGA light high-performance pouring asphalt concrete and HRAC ultra-high toughnessCoating ERB resin bonding oil on the upper surface of the lower layer of the quick-setting epoxy resin concrete; the coating weight was 0.5kg/m 2 ；
S8: preparing an epoxy ESMA upper layer, transporting to the site, paving the epoxy ESMA upper layer on a lower layer coated with ERB resin bonding oil, adopting a double-steel-wheel road roller static pressure for 1 time to finish initial compaction, adopting a vibratory road roller to roll for 3 times to finish re-compaction, and finally adopting the double-steel-wheel road roller static pressure for 2 times to ensure that the road surface is smooth, and preserving the health for 7 days to open traffic after compaction.
Example 4
The open rib steel bridge deck pavement structure comprises a hogging moment position pavement structure and a positive bending moment position pavement structure, wherein the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped crossing manner, and the positive bending moment position pavement structure is arranged between the two hogging moment position pavement structures which are arranged in parallel;
the hogging moment position paving structure is respectively an epoxy ESMA upper layer with the thickness of 3.5cm, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer with the thickness of 3.5cm and an R-S independent super waterproof bonding layer from top to bottom;
The positive bending moment position paving structure is composed of an epoxy ESMA upper layer with the thickness of 3.5cm, ERB resin bonding oil, an HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer with the thickness of 3.5cm and an R-S independent ultra-strong waterproof bonding layer from top to bottom.
Preferably, the LPGA lightweight high-performance cast asphalt concrete includes: 10 parts of cementing material, 71 parts of aggregate, 9 parts of light coarse aggregate, 30 parts of mineral powder, 3 parts of high-strength composite fiber and 1 part of additive. The cementing material consists of SBS modified asphalt and rock asphalt according to a mass ratio of 3:1, wherein aggregate is formed by crushing basalt, lightweight coarse aggregate is shale ceramsite, and mineral powder is limestone mineral powder; the high-strength composite fiber comprises carbon fiber with the length of 12mm and steel fiber with the length of 10mm, wherein the mass ratio of the carbon fiber to the steel fiber is 1:1.8; the additive is sodium octadecyl sulfate. LPGA light high-performance pouring asphalt concrete layer spreading basalt macadam with the spreading amount of 9kg/m 2 。
Preferably, the resin mixture in the HRAC ultra-high toughness fast-curing epoxy resin concrete comprises the following components in parts by weight: 75 parts of glycidyl ether epoxy resin, 15 parts of maleic anhydride curing agent, 8 parts of trioxypropane propyl ether diluent and 10 parts of acrylate rubber adhesive. Mineral aggregate proportion is 1# (9.5-13.2 mm): 2# (4.75-9.5 mm): 3# (2.36-4.75 mm): 4# (0.6-2.36 mm): 5# (0 to 0.6 mm): mineral powder=23:22:23:15:10:7, whetstone ratio 7.5%.
Preferably, the R-S independent super waterproof bonding layer comprises three layers, namely an RBchip resin bonding layer, a basalt crushed stone layer and an RM bonding layer from bottom to top.
Preferably, the RBchip resin bonding layer comprises the following components in parts by weight: 70 parts of bisphenol A epoxy resin, 18 parts of maleic anhydride curing agent, 6 parts of butyl glycidyl ether reactive diluent and 6 parts of quartz water-based powder reinforcing agent, wherein the spreading amount of basalt crushed stone layer is 0.5kg/m 2 . The RM adhesive layer comprises the following components in parts by weight: 75 parts of glycidyl ether epoxy resin, 15 parts of maleic anhydride curing agent, 5 parts of trioxypropane propyl ether diluent and 5 parts of acrylate rubber adhesive.
Preferably, the ERB resin bonding oil adopts a normal temperature epoxy adhesive, the fracture elongation of the normal temperature epoxy adhesive is more than or equal to 100 percent, the fracture strength is more than or equal to 1.2MPa, and the coating weight is 0.5kg/m 2 。
Preferably, the epoxy ESMA upper layer comprises the following components in parts by weight: 6 parts of cementing material, 80 parts of basalt aggregate and 14 parts of polyethylene terephthalate additive; the cementing material is prepared from composite epoxy resin and rubber modified asphalt according to a ratio of 1:1.3, wherein the composite epoxy resin comprises the following components in parts by weight: 65 parts of glycidyl ether epoxy resin, 25 parts of maleic anhydride curing agent, 5 parts of trioxypropane propyl ether diluent and 5 parts of acrylate rubber adhesive. The basalt aggregate comprises coarse and fine aggregates, wherein the aggregate proportion is 1# (5-10 mm): 2# (3-5 mm): 3# (1-3 mm): 4# (0.075-1 mm) =56:8:27:9.
As shown in fig. 5, the method for preparing the open rib steel bridge deck pavement structure in the embodiment of the invention comprises the following operation steps:
s1: sand blasting and rust removing are carried out on the steel bridge deck, the cleanliness reaches more than Sa2.5, the roughness reaches 80 mu m, and a double-component polyamine cured epoxy zinc-rich anti-corrosion primer is sprayed;
s2: cleaning the surface of the epoxy zinc-rich anti-corrosion primer, and coating an R-S independent super waterproof bonding material on the surface of the epoxy zinc-rich anti-corrosion primer, and synchronously spreading broken stone with the dosage of 0.5kg/m 2 Placing a construction mold on the surface of the epoxy zinc-rich anti-corrosion primer after curing for 1.5 days at normal temperature;
s3: as shown in fig. 4, the arrangement of the templates distinguishes two pavement structures, namely, a hogging moment position pavement structure and a positive bending moment position pavement structure;
s4: preparing LPGA light high-performance pouring asphalt concrete, paving the asphalt concrete at a negative bending moment position paving structure mark of a template system after the asphalt concrete is transported to the site, and controlling the paving thickness to be 3.5cm by using the designed template system in a manual paving mode to ensure the paving surface to be smooth;
s5: the broken stone is wrapped by SBS modified asphalt, the using amount of the SBS modified asphalt is 0.4%, the particle size of the premixed asphalt broken stone is 15mm, and the broken stone cooled after premixed is kept in a dispersed state; spreading a certain amount of broken stone on the LPGA light high-performance pouring asphalt concrete layer in a manual mode, carrying out manual preliminary rolling when the broken stone is not sinking under the action of self weight, and removing a template system after maintenance is finished;
S6: preparing HRAC ultra-high toughness fast-curing epoxy resin concrete, paving the HRAC ultra-high toughness cold-mix epoxy resin concrete at a gap between hogging moment position paving structures in a manual mode, and controlling paving thickness to be 3.5cm by using the height of the paved hogging moment position paving structures. Kneading for 8 times by adopting a 26t rubber-tired roller within 25min for compaction, and then curing for 2 days at normal temperature;
s7: coating ERB resin bonding oil on the lower layer of the LPGA light high-performance pouring asphalt concrete and the upper surface of the lower layer of the HRAC ultra-high toughness fast-curing epoxy resin concrete; the coating weight was 0.5kg/m 2 ；
S8: preparing an epoxy ESMA upper layer, transporting to the site, paving the epoxy ESMA upper layer on a lower layer coated with ERB resin bonding oil, adopting a double-steel-wheel road roller static pressure for 1 time to finish initial compaction, adopting a vibratory road roller to roll for 3 times to finish re-compaction, and finally adopting the double-steel-wheel road roller static pressure for 2 times to ensure that the road surface is smooth, and preserving the health for 7 days to open traffic after compaction.
Example 5
The open rib steel bridge deck pavement structure comprises a hogging moment position pavement structure and a positive bending moment position pavement structure, wherein the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped crossing manner, and the positive bending moment position pavement structure is arranged between the two hogging moment position pavement structures which are arranged in parallel;
The hogging moment position pavement structure is composed of an epoxy ESMA upper layer with the thickness of 3.5cm, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer with the thickness of 3cm and an R-S independent super waterproof bonding layer from top to bottom;
the positive bending moment position pavement structure is composed of an epoxy ESMA upper layer with the thickness of 3.5cm, ERB resin bonding oil, an HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer with the thickness of 3cm and an R-S independent ultra-strong waterproof bonding layer from top to bottom.
Preferably, the LPGA lightweight high-performance cast asphalt concrete includes: 9 parts of cementing material, 68 parts of aggregate, 7 parts of light coarse aggregate, 25 parts of mineral powder, 1 part of high-strength composite fiber and 0.5 part of additive. The cementing material consists of SBS modified asphalt and rock asphalt according to a mass ratio of 3:1, wherein aggregate is formed by crushing basalt, lightweight coarse aggregate is shale ceramsite, and mineral powder is limestone mineral powder; the high-strength composite fiber comprises carbon fiber with the length of 12mm and steel fiber with the length of 10mm, wherein the mass ratio of the carbon fiber to the steel fiber is 1:1.8; the additive is sodium octadecyl sulfate. LPGA light high-performance pouring asphalt concrete layer spreading basalt macadam with the spreading amount of 9kg/m 2 。
Preferably, the resin mixture in the HRAC ultra-high toughness fast-curing epoxy resin concrete comprises the following components in parts by weight: 70 parts of glycidyl ether epoxy resin, 10 parts of maleic anhydride curing agent, 8 parts of triglycidyl propyl ether diluent and 10 parts of acrylate rubber adhesive. Mineral aggregate proportion is 1# (9.5-13.2 mm): 2# (4.75-9.5 mm): 3# (2.36-4.75 mm): 4# (0.6-2.36 mm): 5# (0 to 0.6 mm): mineral powder=23:22:23:15:10:7, whetstone ratio 7.5%.
Preferably, the R-S independent super waterproof bonding layer comprises three layers, namely an RBchip resin bonding layer, a basalt crushed stone layer and an RM bonding layer from bottom to top.
Preferably, the RBchip resin bonding layer comprises the following components in parts by weight: 70 parts of bisphenol A epoxy resin, 18 parts of maleic anhydride curing agent, 6 parts of butyl glycidyl ether reactive diluent and 6 parts of quartz water-based powder reinforcing agent, wherein the spreading amount of basalt crushed stone layer is 0.4kg/m 2 . The RM adhesive layer comprises the following components in parts by weight: 70 parts of glycidyl ether epoxy resin, 10 parts of maleic anhydride curing agent, 8 parts of triglycidyl propyl ether diluent and 10 parts of acrylate rubber adhesive.
Preferably, the ERB resin bonding oil adopts a normal temperature epoxy adhesive, the fracture elongation of the normal temperature epoxy adhesive is more than or equal to 100 percent, the fracture strength is more than or equal to 1.2MPa, and the coating weight is 0.5kg/m 2 。
Preferably, the epoxy ESMA upper layer comprises the following components in parts by weight: 7 parts of cementing material, 80 parts of basalt aggregate and 13 parts of polyethylene terephthalate additive; the cementing material is prepared from composite epoxy resin and rubber modified asphalt according to a ratio of 1:1.3, wherein the composite epoxy resin comprises the following components in parts by weight: 70 parts of glycidyl ether epoxy resin, 16 parts of maleic anhydride curing agent, 8 parts of trioxypropane propyl ether diluent and 6 parts of acrylate rubber adhesive. The basalt aggregate comprises coarse and fine aggregates, wherein the aggregate proportion is 1# (5-10 mm): 2# (3-5 mm): 3# (1-3 mm): 4# (0.075-1 mm) =56:8:27:9.
As shown in fig. 5, the method for preparing the open rib steel bridge deck pavement structure in the embodiment of the invention comprises the following operation steps:
s1: sand blasting and rust removing are carried out on the steel bridge deck, the cleanliness reaches more than Sa2.5, the roughness reaches 100 mu m, and a double-component polyamine cured epoxy zinc-rich anti-corrosion primer is sprayed;
S2: cleaning the surface of the epoxy zinc-rich anti-corrosion primer, and coating an R-S independent super waterproof bonding material on the surface of the epoxy zinc-rich anti-corrosion primer, and synchronously spreading broken stone with the dosage of 0.4kg/m 2 Placing a construction mold on the surface of the epoxy zinc-rich anti-corrosion primer after curing for 1.5 days at normal temperature;
s3: as shown in fig. 4, the arrangement of the templates distinguishes two pavement structures, namely, a hogging moment position pavement structure and a positive bending moment position pavement structure;
s4: preparing LPGA light high-performance pouring asphalt concrete, paving the asphalt concrete at a negative bending moment position paving structure mark of a template system after the asphalt concrete is transported to the site, controlling the paving thickness to be 3cm by using the designed template system in a manual paving mode, and ensuring the paving surface to be smooth;
s5: the broken stone is wrapped by SBS modified asphalt, the using amount of the SBS modified asphalt is 0.4%, the particle size of the premixed asphalt broken stone is 15mm, and the broken stone cooled after premixed is kept in a dispersed state; spreading a certain amount of broken stone on the LPGA light high-performance pouring asphalt concrete layer in a manual mode, carrying out manual preliminary rolling when the broken stone is not sinking under the action of self weight, and removing a template system after maintenance is finished;
s6: preparing HRAC ultra-high toughness fast-curing epoxy resin concrete, paving the HRAC ultra-high toughness cold-mix epoxy resin concrete at a gap between hogging moment position paving structures in a manual mode, and controlling paving thickness to be 3cm by using the height of the paved hogging moment position paving structures. Kneading for 6 times by adopting a 26t rubber-tired roller within 25min for compaction, and then curing for 2 days at normal temperature;
S7: coating ERB resin bonding oil on the lower layer of the LPGA light high-performance pouring asphalt concrete and the upper surface of the lower layer of the HRAC ultra-high toughness fast-curing epoxy resin concrete; the coating weight was 0.5kg/m 2 ；
S8: preparing an epoxy ESMA upper layer, transporting to the site, paving the epoxy ESMA upper layer on a lower layer coated with ERB resin bonding oil, adopting a double-steel-wheel road roller static pressure for 1 time to finish initial compaction, adopting a vibratory road roller to roll for 3 times to finish re-compaction, and finally adopting the double-steel-wheel road roller static pressure for 2 times to ensure that the road surface is smooth, and preserving the health for 7 days to open traffic after compaction.
Comparative example 1
The paving structure is respectively an epoxy ESMA upper layer with the thickness of 3cm, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer with the thickness of 4cm and an R-S independent super waterproof bonding layer from top to bottom;
preferably, the comparative example does not need to be cross-paved, the lower layer of the LPGA light high-performance pouring asphalt concrete is selected for full-face paving, and other paving structure layers and paving methods are the same as those of the embodiment 1 and are not repeated here.
Comparative example 2
The paving structure comprises an epoxy ESMA upper layer with the thickness of 3cm, ERB resin bonding oil, an HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer with the thickness of 4cm and an R-S independent super waterproof bonding layer from top to bottom.
Preferably, the comparative example does not need cross-laying, and the lower layer of the HRAC ultra-high toughness fast-setting epoxy resin concrete is selected for full-face laying, and other paving structure layers and paving methods are the same as those of the embodiment 1, and are not repeated here.
Comparative example 3
The open rib steel bridge deck pavement structure comprises a hogging moment position pavement structure and a positive bending moment position pavement structure, wherein the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped crossing manner, and the positive bending moment position pavement structure is arranged between the two hogging moment position pavement structures which are arranged in parallel;
the hogging moment position pavement structure is composed of an epoxy ESMA upper layer with the thickness of 3cm, ERB resin bonding oil, an LPGA light high-performance pouring asphalt concrete lower layer with the thickness of 4cm and a waterproof bonding layer from top to bottom.
The positive bending moment position pavement structure comprises an epoxy ESMA upper layer with the thickness of 3cm, ERB resin bonding oil, an HRAC ultra-high toughness quick-fixing epoxy resin concrete lower layer with the thickness of 4cm and a waterproof bonding layer from top to bottom.
Preferably, the waterproof bonding layer is an RM bonding layer; the rest of the paving structure layer and the paving method are the same as those of the embodiment 1, and are not repeated here.
Performance verification
The various performance index parameters of the LPGA light high-performance cast asphalt concrete prepared in the above examples and comparative examples are shown in table 1 below.
TABLE 1
Various performance index parameters of the HRAC ultra-high toughness fast-setting epoxy concrete prepared in the above examples and comparative examples are shown in table 2 below.
TABLE 2
Various performance index parameters of the ESMA epoxy asphalt concrete prepared in the above examples and comparative examples are shown in Table 3 below.
TABLE 3 Table 3
The various performance index parameters of the R-S free standing ultra strong waterproof adhesive materials prepared in the above examples and comparative examples and the waterproof adhesive materials in the comparative examples are shown in table 4 below.
TABLE 4 Table 4
The various performance index parameters of the steel bridge deck pavement structures paved in the above examples and comparative examples and the comparative examples are shown in the following table 5.
TABLE 5
As can be seen from the above tables 1 to 5, the open rib steel bridge deck pavement structures of the embodiments 1 to 5 of the present invention have excellent technical indexes, can meet the use requirements of the steel bridge deck pavement layer, have high-temperature heavy-load bearing capacity and anti-cracking and fatigue-resistant performance pavement bearing capacity, prolong the pavement service life, and delay the fatigue of the steel bridge deck.
Compared with the embodiment 1, the comparative example 1 does not perform cross-laying, the lower layer of the LPGA light high-performance pouring asphalt concrete is selected for complete laying, and the data and the results show that the setting mode of the comparative example 1 is compared with the fine design mode in the embodiment 1, and the stress of the steel bridge surface is uneven under the action of vehicle load, so that the test data is obviously reduced.
Comparative example 2 compared with example 1, no cross-laying was performed, and the full-face laying of the lower layer of HRAC ultra-high toughness fast-setting epoxy resin concrete was selected, and as can be seen from the data and results, the full-face laying of the lower layer of HRAC ultra-high toughness fast-setting epoxy resin concrete has a negative effect on the load stress of the steel bridge deck, similar to comparative example 1.
Comparative example 3 the waterproof adhesive layer was an RM adhesive layer compared to example 1; compared with the three-layer arrangement of the RBchip resin bonding layer, the basalt stone layer and the RM adhesive layer in the embodiment 1, the waterproof bonding effect in the comparative example 3 is obviously reduced, and the testing performance of the corresponding other paving structure layers is also correspondingly affected, so that the paving structure of the embodiment plays a positive role in prolonging the paving service life.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (9)
1. The open rib steel bridge deck pavement structure is characterized by comprising a hogging moment position pavement structure and a positive bending moment position pavement structure, wherein the positive bending moment position pavement structure and the hogging moment position pavement structure are arranged in a strip-shaped crossing manner, and the positive bending moment position pavement structure is arranged between the two hogging moment position pavement structures which are arranged in parallel;
The hogging moment position paving structure is respectively an epoxy ESMA upper layer, ERB resin bonding oil, an LPGA light high-performance pouring type asphalt concrete lower layer and an R-S independent super waterproof bonding layer from top to bottom;
the positive bending moment position paving structure is respectively an epoxy ESMA upper layer, ERB resin bonding oil, an HRAC ultra-high toughness fast-curing epoxy resin concrete lower layer and an R-S independent super waterproof bonding layer from top to bottom;
the R-S independent super waterproof bonding layer comprises three layers, namely an RBchip resin bonding layer, a basalt crushed stone layer and an RM bonding layer from bottom to top.
2. The open rib steel bridge deck pavement structure of claim 1, wherein the total pavement thickness of the hogging moment position pavement structure is 6 cm-8 cm, the layer thickness of the epoxy ESMA upper layer is 3 cm-4 cm, and the layer thickness of the LPGA light high-performance pouring asphalt concrete lower layer is 3 cm-4 cm.
3. The open rib steel bridge deck pavement structure of claim 2, wherein the total pavement thickness of the positive bending moment position pavement structure is 6 cm-8 cm, the layer thickness of the epoxy ESMA upper layer is 3 cm-4 cm, and the layer thickness of the HRAC ultra-high toughness fast-setting epoxy resin concrete lower layer is 3 cm-4 cm.
4. The open-ribbed steel bridge deck pavement structure of claim 2, wherein said LPGA lightweight high performance cast asphalt concrete lower layer comprises the following components in parts by weight: 7-10 parts of cementing material, 60-73 parts of aggregate, 1-10 parts of light coarse aggregate, 20-30 parts of mineral powder, 1-3 parts of high-strength composite fiber and 0.3-1 part of additive;
the cementing material consists of common modified asphalt and natural asphalt according to the mass ratio of 3:1-4:1.
5. The open rib steel bridge deck pavement structure of claim 3, wherein the HRAC ultra-high toughness fast-setting epoxy resin concrete lower layer comprises the following components in parts by weight: 70-80 parts of glycidyl ether epoxy resin, 10-15 parts of maleic anhydride curing agent, 2-10 parts of triglycidyl propyl ether diluent and 3-10 parts of acrylate rubber adhesive.
6. The open-rib steel bridge deck pavement structure of claim 5, wherein the HRAC ultra-high toughness fast-setting epoxy resin concrete lower layer further comprises mineral aggregate with an oil-to-stone ratio of 7.5%.
7. The open-rib steel bridge deck pavement structure of claim 1, wherein the ERB resin bonding oil is a normal temperature epoxy adhesive.
8. The open rib steel bridge deck pavement structure of claim 1, wherein the epoxy ESMA upper layer comprises the following components in parts by weight: 6-8 parts of cementing material, 80-85 parts of aggregate and 7-14 parts of polyethylene terephthalate additive, wherein the cementing material consists of composite epoxy resin and rubber modified asphalt according to a mass ratio of 1:1-1.4; the composite epoxy resin comprises the following components in parts by weight: 60-70 parts of glycidyl ether epoxy resin, 15-25 parts of maleic anhydride curing agent, 5-10 parts of triglycidyl propyl ether diluent and 5-10 parts of acrylate rubber adhesive.
9. A method for preparing the open rib steel bridge deck pavement structure according to any one of claims 1 to 8, which is characterized by comprising the following operation steps:
s1: sand blasting and rust removing are carried out on the steel bridge deck, and a double-component polyamine cured epoxy zinc-rich anti-corrosion primer is sprayed;
s2: cleaning the surface of the epoxy zinc-rich anti-corrosion primer, coating an R-S independent super waterproof bonding layer on the surface of the epoxy zinc-rich anti-corrosion primer, and placing a construction mold on the surface of the epoxy zinc-rich anti-corrosion primer after normal temperature health maintenance;
s3: distinguishing and arranging the hogging moment position paving structure and the positive bending moment position paving structure by using a construction mold arrangement template;
S4: preparing LPGA light high-performance pouring asphalt concrete, and paving a pavement structure mark at a hogging moment position in the template after the asphalt concrete is transported to the site, controlling pavement thickness and ensuring the surface of pavement to be smooth;
s5: the method comprises the steps of wrapping broken stone with polymer composite modified asphalt, spreading a certain amount of broken stone into LPGA light high-performance pouring asphalt concrete, carrying out preliminary rolling when the broken stone is not sinking under the action of self weight, and removing a template system after maintenance is finished;
s6: preparing HRAC ultra-high toughness fast-curing epoxy resin concrete, paving gaps among the hogging moment position paving structures after transporting the concrete to the site, controlling paving thickness by utilizing the height of the paved hogging moment position paving structures, compacting and curing at normal temperature;
s7: coating ERB resin bonding oil on the upper surfaces of the LPGA light high-performance pouring asphalt concrete and the HRAC ultra-high toughness fast-curing epoxy resin concrete;
s8: preparing an epoxy ESMA upper layer, transporting to the site, paving the epoxy ESMA upper layer on a paving lower layer coated with ERB resin bonding oil, and curing at normal temperature after compacting.
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