A semi-assembled steel box girder bridge deck pavement structure and a construction method thereof

Abstract

The application provides a semi-assembly steel box girder bridge deck pavement structure and a construction method thereof, the pavement structure comprises, from bottom to top, a rust prevention layer, a waterproof bonding layer, a high-performance structure layer, a bonding layer, a embedded crushed stone layer and an abrasion layer arranged on a steel box girder bridge deck, wherein the steel box girder and the rust prevention layer, the waterproof bonding layer and the high-performance structure layer form a prefabricated part; the semi-assembly pavement structure has the following advantages: (1) performance advantage: high quality stability and easy maintenance; (2) construction advantage: high speed, high degree of mechanization and small demand for land; (3) environmental protection advantage: few quality defects, low waste rate and low construction temperature; (4) application advantage: strong anti-interference and adaptability to various construction environments; and the application has wide application and promotion prospect in the areas with fragile ecology and large bridge construction demand such as Qinghai-Tibet and Xinjiang and the cities requiring rapid construction of viaducts to disperse traffic.

Description

Technical Field

[0001] The invention relates to a semi-assembled steel box girder bridge deck pavement structure and a construction method thereof, belonging to the technical field of road engineering. Background Art

[0002] Steel bridge deck pavement, as a protective structure for the steel bridge deck and a bridge structure providing traffic flow, is typically installed on-site. Numerous complex factors, including environmental, climatic, and human factors, can make it difficult to guarantee the quality and timeframe of the pavement. This, coupled with the short construction period and high waste disposal requirements during construction, present numerous challenges for bridge deck pavement construction.

[0003] Currently, the development of prefabricated asphalt pavement for steel bridge decks is slow, with few application cases. The reasons are as follows: 1) Due to the orthogonal nature of steel bridge decks and heavy traffic loads, epoxy asphalt mixtures, with their excellent deformation tolerance and service performance, have become the preferred material for the lower layer of steel bridge deck pavement structures. However, as a thermosetting material, epoxy asphalt mixtures require curing to maintain optimal performance, resulting in a long construction period. 2) Developing prefabricated construction technology for steel bridge deck pavements can effectively mitigate the impact of harsh environmental factors on steel bridge deck construction. Standardized production in the factory, while ensuring high quality and efficiency of the pavement layer, can effectively reduce the asphalt mixture waste rate, minimize the impact of waste on the environment, and significantly shorten the on-site construction period of bridge deck pavement. During the on-site construction phase, the heating, mixing, and paving operations of hot-mix asphalt mixtures generate high temperatures, large amounts of heat and exhaust gases, and high carbon emissions, making them less environmentally friendly. Using warm-mix asphalt mixtures can effectively reduce carbon and exhaust emissions while maintaining the service performance of the asphalt pavement layer. Mash asphalt (SMA) is typically used as the top layer in steel bridge deck pavement, but it can suffer from rutting, aging, and other defects during actual use. 3) The thickness of asphalt pavement on steel bridge decks is generally less than 10 cm. If a prefabricated asphalt mixture pavement structure is constructed alone, its bending and flexural strength is weak, and it is prone to deformation and cracking during transportation and lifting.

[0004] If the double-layer pavement structure is completely laid on the steel bridge deck at the factory stage and then hoisted and spliced ​​on-site to achieve complete assembly, the serviceability of the spliced ​​areas will be reduced, making them susceptible to water erosion and serious damage such as steel bridge deck corrosion. 4) Currently, most asphalt mixtures used in bridge deck pavement require rolling to provide adequate serviceability. Bridge prefabricated components during the factory prefabrication stage are difficult to adapt to the operation of large-scale rolling machinery. Summary of the Invention

[0005] The application aims to provide a semi-assembled steel box girder bridge deck pavement structure and a construction method thereof, the semi-assembled steel box girder bridge deck pavement structure is a double-layer pavement structure, the lower layer pavement is prefabricated together with the steel box girder body to form a prefabricated piece of "steel box girder body + asphalt pavement", which can meet the service performance of the steel bridge deck pavement and adapt to the prefabrication conditions in the factory. The construction method realizes the standardized production of the steel bridge deck main structure in the factory, reduces the on-site construction process of the steel bridge deck pavement, shortens the construction period, reduces the influence of the construction environment on the pavement quality, effectively reduces the emission of waste and waste gas, reduces the influence of the construction on the surrounding environment, is suitable for the areas with fragile ecological environment and large bridge construction demand and the cities requiring rapid construction of viaducts to disperse traffic flow, and has wide application prospect.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the application is as follows:

[0007] In the semi-assembled steel box girder bridge deck pavement structure, the following points need to be considered:

[0008] (a) The research and development purpose of the semi-assembled steel box girder bridge deck pavement structure is to reduce the on-site construction period on the premise of ensuring that the steel bridge deck pavement structure has excellent service performance, so the performance and deformation coordination ability with the steel bridge deck of the structural layer need to be considered comprehensively to prevent cracks and other adverse diseases in the transportation process and hoisting process, and the wearing layer needs to use asphalt mixture with short maintenance time as much as possible to ensure the construction speed and reduce the construction period.

[0009] (b) Considering the integrity and interlayer adhesion of the pavement structure, and considering the different performance requirements of the structural layer and the wearing layer of the double-layer pavement structure on the asphalt mixture, different asphalt mixtures are used in the structural layer and the wearing layer to ensure that the entire pavement structure has excellent low-temperature crack resistance, high-temperature rutting resistance, fatigue resistance, freeze-thaw cycle resistance and the like.

[0010] (c) The wearing layer is a structure directly contacting with vehicles and also a protective layer directly contacting with the natural environment, and needs to meet the durability and driving safety and comfort of the pavement structure, and for the areas with severe environment, the wearing layer also needs to have sufficient freeze-thaw cycle resistance and ultraviolet aging resistance and the like.

[0011] (d) The design of the semi-assembled steel box girder bridge deck pavement structure should consider the construction feasibility and convenience, try to use mature construction machinery and construction methods, reduce the training of construction personnel, and use existing technologies and facilities as much as possible in the factory prefabrication stage to reduce or avoid large-scale modification of the factory, and promote the use and promotion of the semi-assembled steel box girder bridge deck pavement.

[0012] A semi-assembled steel box girder bridge deck pavement structure, comprising: a steel bridge deck 2, a pre-laid anti-rust layer 3, a pre-laid waterproof bonding layer 4, a pre-laid high-performance structural layer 5, a bonding layer 6, an embedded crushed stone layer 7, and a wearing layer 8, arranged sequentially on a U-rib and a substructure 1 from bottom to top;

[0013] The pre-laid anti-rust layer 3 and the pre-laid high-performance structural layer 5 are bonded by a pre-laid waterproof bonding layer 4; the pre-laid high-performance structural layer 5 and the wear layer 8 are bonded by a bonding layer 6; the embedded crushed stone layer 7 is embedded between the bonding layer 6 and the wear layer 8;

[0014] The U-rib and the lower structure 1, and the steel bridge deck 2 constitute a steel box girder body, and the U-rib and the lower structure 1, the steel bridge deck 2, the pre-laid anti-rust layer 3, the pre-laid waterproof bonding layer 4, and the pre-laid high-performance structural layer 5 constitute a "steel box girder body + asphalt pavement" prefabricated component;

[0015] The pre-paved high-performance structural layer 5 is paved with epoxy asphalt mixture EA-10;

[0016] The wearing layer 8 is paved with warm-mix SBS modified mastic asphalt crushed stone mixture SMA-13.

[0017] Preferably, the epoxy asphalt mixture EA-10 is prepared by mixing epoxy asphalt, basalt aggregate and mineral powder in a mass ratio of 6.4~6.8:91~93:6~9; wherein the epoxy asphalt is prepared by configuring base asphalt, bisphenol A epoxy resin and methyl hexahydrophthalic anhydride curing agent in a mass ratio of 18~21:10:9~11; the nominal maximum particle size of the basalt aggregate is 9.5 mm; and the thickness of the pre-laid high-performance structural layer 5 is 30~40 mm.

[0018] Preferably, the warm mix SBS modified asphalt mastic macadam mixture SMA-13 ​​is composed of SBS modified asphalt, warm mix agent, basalt aggregate, mineral powder, and lignin fiber in a mass ratio of 6.3~6.5:0.2~0.35:90~93:7~10:0.3~0.4; the thickness of the wearing layer 8 is 30~45 mm.

[0019] Preferably, the pre-laid anti-rust layer 3 is sprayed with water-based epoxy resin zinc-rich paint for anti-corrosion, which reduces the pollution of traditional amine zinc-rich anti-corrosion paint to the environment and is environmentally friendly; the water-based epoxy resin zinc-rich paint is prepared by mixing modified water-based epoxy resin, modified polyamine curing agent, and zinc powder in a mass ratio of 6:2~3:15~17; the modified water-based epoxy resin is prepared by mixing water-based epoxy resin, deionized water, dispersant, defoaming agent, and substrate wetting agent in a mass ratio of 18:5~6:0.2:0.5:0.8~1.0; the thickness of the pre-laid anti-rust layer 3 is 60~80µm.

[0020] Preferably, the pre-laid waterproof bonding layer 4 is sprayed with epoxy resin bonding material, and the epoxy resin bonding material is made of epoxy resin and epoxy resin toughening curing agent in a mass ratio of 4:0.9~1.1; the amount of epoxy resin bonding material is 0.60~0.95kg / m 2 .

[0021] Preferably, the bonding layer 6 is sprayed with epoxy asphalt bonding material, which is composed of epoxy resin, epoxy resin toughening curing agent, and matrix asphalt in a mass ratio of 4:0.9~1.1:4.9~5.1; the amount of epoxy asphalt bonding material is 0.55~0.8kg / m 2 The spraying and laying of the bonding layer must be carried out 3 days after the epoxy asphalt mixture is poured and compacted at the joints of the pre-laid high-performance structural layer.

[0022] Preferably, the embedded crushed stone layer 7 is laid with premixed asphalt basalt crushed stone. The premixed asphalt basalt crushed stone is composed of basalt crushed stone and epoxy asphalt binder. After being coated with the epoxy asphalt binder, the basalt crushed stone can form a good whole with the bonding layer to prevent the intrusion of moisture. The epoxy asphalt binder is composed of epoxy resin, epoxy resin toughening curing agent, and matrix asphalt in a mass ratio of 4:0.9~1.1:4.9~5.1. The particle size of the basalt crushed stone is 2.36~4.75mm. The amount of premixed asphalt basalt crushed stone is 1.2~1.4kg / m 2 .

[0023] A construction method for a semi-assembled steel box girder bridge deck pavement structure includes two stages and nine steps:

[0024] Factory stage:

[0025] Step 1. First weld the U-rib and the U-rib part of the lower structure 1 to the steel bridge deck 2, and then correct the size of the steel bridge deck 2 by stretching or other methods; there are several U-ribs in the U-rib and the lower structure 1, and their main role in the steel box girder bridge is to support the steel bridge deck, improve the rigidity of the steel bridge deck, improve the stress state of the entire steel bridge deck, and prevent the steel bridge deck from producing huge deformation under the action of load. There is only one steel bridge deck 2 in each prefabricated part, and welding is performed first to reduce the deformation caused by the temperature stress generated during the later welding process of the steel bridge deck 2, the U-rib and the lower structure 1; then clean the surface of the steel bridge deck 2 Attachments and debris, since the paving and rolling of the pre-paved high-performance structural layer 5 requires firm support to prevent the steel bridge deck 2 from undergoing large deformation under load and to improve the paving quality, multiple steel bridge decks 2 need to be arranged and fixed for support. Multiple continuous paving can be adopted to improve construction efficiency and shorten the factory construction period. The top can be shielded by a tiled steel roof to reduce the impact of environmental factors such as rain and wind, ensuring construction quality and time limit requirements; then an automatic dust-free sandblasting machine is used for overall sandblasting and rust removal, with the sandblasting and rust removal operation belt overlapping by 5 to 8 cm. Finally, a portable grinder is used to manually grind the edges and corners and pits of the steel bridge deck 2;

[0026] Step 2: First, check the rust removal status of the steel bridge deck 2 to determine whether the surface treatment quality meets the requirements. Then, cover the welding parts of the steel bridge deck 2 during the later on-site construction to prevent the spraying from affecting the welding quality in step 6. Then, within 2 to 5 hours after the sandblasting and rust removal work in step 1, perform anti-corrosion spraying of the pre-laid anti-rust layer 3. After the anti-corrosion spraying is completed, test the tensile strength of the pre-laid anti-rust layer 3 every 30 to 50 minutes. The next process can only be carried out after the tensile strength reaches 7.5 MPa or above.

[0027] Step 3: Use a spreading vehicle to spread the epoxy resin adhesive for the pre-laid waterproof bonding layer 4. The number of spreading times is 1 to 3 times. The total amount of spreading should meet the design requirements. The places where the water is leaking or insufficiently sprinkled should be corrected manually in time, and the places where the water is over-sprayed should be handled in time. The surface of the epoxy resin adhesive needs to be tested for bonding strength to ensure the construction quality of the pre-laid waterproof bonding layer 4.

[0028] Step 4: First, perform paving operations on the pre-laid high-performance structural layer 5, and then perform rolling operations on the pre-laid high-performance structural layer 5; wherein, the rolling operations are divided into three stages: first, perform initial compaction using a rubber-wheel roller, with 3 to 5 rolling passes and a minimum operating temperature of 155°C; then perform secondary compaction using a steel-wheel roller, with 4 to 5 rolling passes and a minimum operating temperature of 120°C; and finally perform final compaction using a rubber-wheel roller, with 4 to 5 rolling passes and a minimum operating temperature of 95°C. Remove uncompacted mixture and discard unpaved mixture; after curing for 3 days, remove excess epoxy asphalt mixture at the reserved welding positions of the steel bridge deck 2, and cover the exposed steel positions on the upper surface of the steel bridge deck 2 to prevent rusting;

[0029] Step 5: After the pre-laid high-performance structural layer 5 epoxy asphalt mixture is naturally cured for 7 to 9 days, pay attention to the cleanliness of the surface of the pre-laid high-performance structural layer 5 during the curing period. After the curing is completed, the U-ribs and the lower structure 1 are welded to the steel bridge deck 2 to form the "steel box girder body + asphalt pavement" prefabricated component. During the entire welding process, pay attention to heat dissipation and protection of the pre-laid high-performance structural layer 5;

[0030] On-site stage:

[0031] Step 6: First, transport the "steel box girder body + asphalt pavement" prefabricated parts to the site, hoist and splice the "steel box girder body + asphalt pavement" prefabricated parts, and complete the welding of the steel box girder body into the bridge; then clean the surface debris of the pre-laid high-performance structural layer 5, and manually polish and remove rust from the welding parts of the steel bridge deck 2; then, pre-lay the anti-rust layer 3, pre-laid waterproof bonding layer 4, and pre-laid high-performance structural layer 5 on both sides of the "steel box girder body + asphalt pavement" prefabricated parts, and perform anti-corrosion spraying, epoxy resin bonding material laying, and epoxy asphalt mixture pouring in sequence at the joints; finally, use heavy ballasting or roller rolling to roll the epoxy asphalt mixture at the joints;

[0032] Step 7: Use a spreader to spread the epoxy asphalt binder for the bonding layer 6. The number of spreads is 1 to 3 times, and the total amount of spread should meet the design requirements. Manually apply to corners and pits. Any missed or insufficiently spread areas should be manually corrected in a timely manner, and any areas of excessive spraying should be handled promptly. The surface of the epoxy asphalt binder needs to be tested for bond strength to ensure the construction quality of the bonding layer 6.

[0033] Step 8: First, the basalt gravel is coated with epoxy asphalt binder to obtain premixed asphalt basalt gravel, and then a gravel spreader is used to lay the embedded gravel layer 7;

[0034] Step 9, first, the paving work of the wearing layer 8 is carried out; then, the rolling work of the wearing layer 8 is carried out; the rolling work is divided into three stages: first, the initial pressure is carried out, the steel wheel roller is adopted, the rolling number is 4-5 times, the minimum operation temperature is 135℃, then the re-pressing is carried out, the steel wheel roller is adopted, the rolling number is 3-4 times, the minimum operation temperature is 100℃, finally, the final pressure is carried out, the steel wheel roller is adopted, the rolling number is 4-5 times, the minimum operation temperature is 75℃, the paving work needs to pay attention to the weather condition in time, the construction progress is arranged, if it suddenly rains, the construction needs to be stopped immediately, and the mixture which is not compacted and formed is removed.

[0035] Preferably, in step 2, in the anticorrosion spraying process, each paint film overlaps the previous paint film by 1 / 4-1 / 3 area, and defects such as sagging, missing spraying, dry spraying and cracking are avoided as much as possible, and timely treatment is carried out after the defects occur;

[0036] In step 4, the paving work is carried out by using a small asphalt concrete paver, and the paving speed is 1.0-1.5 m / min;

[0037] In step 9, the paving work is carried out by using an asphalt concrete paver for double-machine continuous paving, and the paving speed is 1.0-1.5 m / min.

[0038] Preferably, the preparation method of the epoxy resin adhesive of the pre-paved waterproof adhesive layer 4 is as follows: first, the epoxy resin and the epoxy resin toughening type curing agent are respectively circulated and heated to 55-65℃ and 50-60℃, then the epoxy resin and the epoxy resin toughening type curing agent are mixed according to the mass ratio, and stirred for 4-5 min to mix uniformly;

[0039] The preparation method of the epoxy asphalt adhesive of the adhesive layer 6 is as follows: first, the base asphalt is heated to 155-165℃, the epoxy resin and the epoxy resin toughening type curing agent are respectively circulated and heated to 55-65℃ and 50-60℃, then the base asphalt and the epoxy resin toughening type curing agent are mixed according to the mass ratio, stirred for 3-4 min, then the epoxy resin is added according to the mass ratio, and stirred for 4-5 min to mix uniformly;

[0040] The preparation method of the epoxy asphalt mixture EA-10 of the pre-paved high-performance structural layer 5 is as follows: first, the bisphenol A type epoxy resin and the methylhexahydrophthalic anhydride curing agent are respectively circulated and heated to 60-70℃ and 50-60℃, the base asphalt is heated to 150-160℃, and the aggregate is heated to 170-190℃; then the base asphalt and the methylhexahydrophthalic anhydride curing agent are mixed according to the mass ratio and stirred for 40-45 s; then the bisphenol A type epoxy resin is added according to the mass ratio, and stirred for 40-45 s to prepare the epoxy asphalt; then the epoxy asphalt is added to the prepared basalt aggregate and stirred for 40-45 s; finally, the mineral powder is added according to the mass ratio and stirred for 40-45 s;

[0041] The preparation method of the warm-mix SBS modified asphalt mastic macadam mixture SMA-13 ​​for the wearing layer 8 is as follows: first, the SBS modified asphalt is heated to 160° C. to 170° C., and the basalt aggregate is heated to 180° C. to 190° C.; then, a warm-mix agent is added to the SBS modified asphalt according to a mass ratio; then, after the temperature of the SBS modified asphalt and warm-mix agent mixture drops to 160° C., it is mixed with the basalt aggregate according to a mass ratio and mixed for 40 to 45 seconds; finally, mineral powder and lignin fiber are added according to a mass ratio and mixed for 40 to 45 seconds.

[0042] Compared with the prior art, the advantages of the present invention are:

[0043] The steel box girder bridge, with its unique production and assembly process of steel box girder segments, combined with the characteristics of the steel box girder bridge construction process, makes semi-assembly possible. After the steel box girder top plate and U-rib are welded, the steel bridge deck can be firmly fixed and supported without large-scale factory construction, allowing the operation of large-scale rolling machinery to proceed. After the lower paving is completed, the steel box girder body is welded as a whole. In the factory stage, the steel box girder body and the lower paving are prefabricated into a whole, hoisted and spliced ​​on site, and then the upper paving is laid.

[0044] (1) Currently, the construction of steel bridge deck pavement is mainly based on on-site construction, which has a long construction period, is greatly affected by environmental factors, and has high labor costs. At the same time, there are certain safety risks in exposed operations, and the emission of waste and exhaust gas affects the surrounding environment. The uneven labor level and changes in environmental factors can easily lead to a decline in the construction quality of steel bridge deck pavement, resulting in construction defects and a high abandonment rate. This is particularly evident in areas with harsh environmental factors. At the same time, there is a lack of sufficient on-site construction time, and the effective construction period is short.

[0045] In the present invention, the asphalt pavement structure layer is constructed through standardized factory construction to construct a "steel box girder + asphalt pavement" prefabricated component, which can avoid interference from environmental factors and ensure construction quality. The asphalt mixture waste rate is much lower than on-site construction, and the construction period can be greatly shortened. The time required for on-site construction is reduced, and the green, low-carbon, high-efficiency and high-quality steel bridge deck pavement is achieved, promoting the assembly construction of steel bridge deck pavement.

[0046] (2) In this construction method, the sandblasting and rust removal of steel plates, anti-corrosion paint spraying, adhesive spreading, and transportation and paving of EA and SMA mixtures all have mature construction processes, are highly operational, are easy to train construction personnel, require little factory modification, and are easy to promote;

[0047] (3) The lower pavement of the semi-assembled steel box girder bridge deck pavement structure adopts epoxy asphalt mixture, which has good deformation coordination ability with the steel box girder bridge deck. The epoxy asphalt is spread in the factory, which can effectively reduce the emission of waste gas and carbon dioxide during on-site construction. At the same time, it reduces the on-site construction time of the steel bridge deck pavement. It is suitable for areas with weak ecology, short construction period but a large demand for bridge construction.

[0048] The use of SBS modified asphalt in the upper pavement also improves the steel bridge deck's freeze-thaw and aging resistance, enhancing its long-term service performance. The use of warm-mix SBS modified asphalt reduces on-site exhaust and carbon dioxide emissions, contributing to environmental protection. Semi-fabricated steel bridge deck pavement, with its environmentally friendly nature, short construction cycles, and excellent service performance, holds great promise for widespread application in areas with harsh environments, fragile ecosystems, and short construction cycles, as well as in large cities where rapid bridge construction is required to disperse traffic. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the semi-assembled steel box girder bridge deck pavement structure;

[0050] Figure 2 This is a schematic diagram of multiple continuous laying of steel bridge decks.

[0051] In the figure: 1-U rib and substructure, 2-steel bridge deck, 3-pre-laid anti-rust layer, 4-pre-laid waterproof bonding layer, 5-pre-laid high-performance structural layer, 6-bonding layer, 7-embedded crushed stone layer, 8-wearing layer. DETAILED DESCRIPTION

[0052] The following is a more detailed description of the semi-assembled steel box girder bridge deck pavement structure and its construction method, with reference to schematic diagrams. These schematic diagrams illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as generally known to those skilled in the art and is not intended to limit the present invention. Example

[0053] like Figure 1 As shown, the semi-assembled steel box girder bridge deck pavement structure designed in the present invention includes a pre-laid anti-rust layer 3, a pre-laid waterproof bonding layer 4, a pre-laid high-performance structural layer 5, a bonding layer 6, an embedded crushed stone layer 7 and a wear layer 8 arranged on the steel box girder body from bottom to top.

[0054] Among them, U-ribs and substructure, steel bridge deck constitute the steel box girder body, and U-ribs and substructure, steel bridge deck, pre-laid anti-rust layer, pre-laid waterproof bonding layer, and pre-laid high-performance structural layer constitute the "steel box girder body + asphalt pavement" prefabricated parts in the factory stage.

[0055] The pre-laid anti-rust layer and the pre-laid high-performance structural layer are bonded through the pre-laid waterproof bonding layer, and the pre-laid high-performance structural layer and the wearing layer are bonded through the bonding layer; the embedded extruded gravel layer (7) is embedded between the bonding layer and the wearing layer.

[0056] The pre-laid anti-rust layer 3 is sprayed with a water-based epoxy zinc-rich paint for corrosion protection, which is prepared by mixing and reacting modified water-based epoxy resin, modified polyamine curing agent and zinc powder in a mass ratio of 3:1:8, and the modified water-based epoxy resin is prepared by mixing and reacting water-based epoxy resin, deionized water, dispersant, defoaming agent and substrate wetting agent in a mass ratio of 18:5.2:0.2:0.5:0.9; the thickness of the pre-laid anti-rust layer is 70µm; the technical requirements of the water-based epoxy zinc-rich paint are shown in Table 1.

[0057] Table 1 Technical requirements of water-based epoxy zinc-rich paint

[0058]

[0059] The pre-laid waterproof bonding layer 4 is sprayed with an epoxy resin bonding material, which is prepared by mixing bisphenol A type epoxy resin and epoxy resin toughening curing agent in a mass ratio of 4:1, and the epoxy resin toughening curing agent is prepared by reacting liquid polysulfide rubber, ethylenediamine and 1,2-dichloroethane as main materials; the dosage of the epoxy resin bonding material is 0.8kg / m 2 ; the technical requirements of the bisphenol A type epoxy resin are shown in Table 2.

[0060] Table 2 Technical requirements of bisphenol A type epoxy resin

[0061]

[0062] The preparation method of the epoxy resin bonding material used in the pre-laid waterproof bonding layer 4 is as follows: first, heat the bisphenol A type epoxy resin and the epoxy resin toughening curing agent to 60℃ in a cycle, then mix the bisphenol A type epoxy resin and the epoxy resin toughening curing agent in a mass ratio of 4:1, stir for 4min, and mix uniformly; the technical requirements of the prepared epoxy resin bonding material are shown in Table 3.

[0063] Table 3 Technical requirements of epoxy resin bonding material

[0064]

[0065] The pre-paved high-performance structural layer 5 is paved with epoxy asphalt mixture EA-10, which is made of epoxy asphalt, basalt aggregate, and limestone powder in a mass ratio of 6.6:92:8. The epoxy asphalt is made of 70# matrix asphalt, bisphenol A epoxy resin, and methyl hexahydrophthalic anhydride curing agent in a mass ratio of 2:1:1. The basalt aggregate is divided into basalt coarse aggregate and basalt fine aggregate. The aggregate is dense, wear-resistant, and has a uniform shape. It is cubic, without needle-like flakes, and has good adhesion with epoxy asphalt. The maximum nominal particle size of basalt aggregate is 9.5 mm; the thickness of the pre-laid high-performance structural layer 5 is 35 mm; the technical requirements of bisphenol A epoxy resin, 70# matrix asphalt, basalt coarse aggregate, basalt fine aggregate and limestone mineral powder are shown in Table 4, Table 5, Table 6, Table 7 and Table 8 respectively, the technical requirements of epoxy asphalt are shown in Table 9, and the technical requirements of EA-10 grading are shown in Table 10.

[0066] Table 4 Technical requirements for bisphenol A epoxy resin

[0067]

[0068] Table 5 Technical requirements for 70# base asphalt

[0069]

[0070] Table 6 Technical requirements for basalt coarse aggregate

[0071]

[0072] Table 7 Technical requirements for basalt fine aggregate

[0073]

[0074] Table 8 Technical requirements for limestone powder

[0075]

[0076] Table 9 Technical requirements for epoxy asphalt

[0077]

[0078] Table 10 EA-10 gradation technical requirements

[0079]

[0080] The preparation method of the epoxy asphalt mixture EA-10 used in the above-mentioned pre-paved high-performance structural layer 5 is as follows: first, bisphenol A epoxy resin and methyl hexahydrophthalic anhydride curing agent are cyclically heated to 60°C, 70# base asphalt is heated to 150°C, and basalt aggregate is heated to 180°C. Then, the 70# base asphalt and methyl hexahydrophthalic anhydride curing agent are mixed according to the mass ratio and stirred for 40 seconds. Subsequently, bisphenol A epoxy resin is added in the required mass ratio and stirred for 40 seconds to obtain epoxy asphalt. Then, the epoxy asphalt is added to the prepared basalt aggregate and stirred for 45 seconds. Finally, limestone slag is added and stirred for 45 seconds to obtain the epoxy asphalt mixture required for the pre-paved high-performance structural layer 5.

[0081] The EA-10 grading scheme in this scheme is shown in Table 11.

[0082] Table 11 Epoxy Asphalt Mixture EA-10 Grading

[0083]

[0084] The bonding layer 6 is sprayed with epoxy asphalt adhesive, which is composed of bisphenol A epoxy resin, epoxy resin toughening curing agent and 70# matrix asphalt in a mass ratio of 4:1:5; the amount of epoxy asphalt adhesive is 0.7kg / m 2 The technical requirements for bisphenol A epoxy resin and 70# matrix asphalt are shown in Table 12 and Table 13.

[0085] Table 12 Technical requirements for bisphenol A epoxy resin

[0086]

[0087] Table 13 Technical requirements for 70# matrix asphalt

[0088]

[0089] The preparation method of the epoxy asphalt binder used in the above-mentioned bonding layer 6 is as follows: first, heat the 70# base asphalt to 155°C, circulate and heat the bisphenol A epoxy resin and the epoxy resin toughening curing agent to 60°C, then mix the 70# base asphalt and the epoxy resin toughening curing agent according to the mass ratio, stir for 3 minutes, then add the bisphenol A epoxy resin according to the mass ratio, stir for 4 minutes, and mix evenly; the technical requirements of the prepared epoxy asphalt binder are shown in Table 14.

[0090] Table 14 Technical requirements for epoxy asphalt binder

[0091]

[0092] The embedded crushed stone layer 7 is laid with premixed asphalt basalt crushed stone. The premixed asphalt basalt crushed stone is composed of basalt crushed stone and epoxy asphalt binder. After being coated with the epoxy asphalt binder, the basalt crushed stone can form a good whole with the bonding layer. The epoxy asphalt binder is composed of bisphenol A epoxy resin, epoxy resin toughening curing agent, and 70# matrix asphalt in a mass ratio of 4:1:5. The particle size of the basalt crushed stone is 2.36mm. The amount of premixed asphalt basalt crushed stone in the bonding layer 6 is 1.3kg / m 2 .

[0093] The wearing layer 8 is paved with warm mix SBS modified asphalt mastic macadam mixture SMA-13, which is composed of IC grade SBS modified asphalt, LKW-II warm mix agent, basalt aggregate, limestone powder, and lignin fiber in a mass ratio of 6.4:0.5:92:8:0.3, wherein the basalt aggregate is divided into basalt coarse aggregate and basalt fine aggregate; the thickness of the wearing layer (8) is 40 mm; the requirements of IC grade SBS modified asphalt, basalt coarse aggregate, basalt fine aggregate, and limestone powder are shown in Table 15, Table 16, Table 17, and Table 18 respectively, and the grading technical requirements of IC grade SMA-13 ​​are shown in Table 19.

[0094] Table 15 Technical requirements for IC grade SBS modified asphalt

[0095]

[0096] Table 16 Technical requirements for basalt coarse aggregate

[0097]

[0098] Table 17 Technical requirements for basalt fine aggregate

[0099]

[0100] Table 18 Technical requirements for limestone powder

[0101]

[0102] Table 19 SMA-13 ​​gradation technical requirements

[0103]

[0104] The preparation method of the warm-mix SBS modified asphalt mastic crushed stone mixture SMA-13 ​​used in the above-mentioned wearing layer 8 is as follows: first, the IC grade SBS modified asphalt is heated to 165°C, and the basalt aggregate is heated to 180°C, and then the warm-mix agent is added to the IC grade SBS modified asphalt according to the mass ratio. Then, after the temperature of the IC grade SBS modified asphalt and warm-mix agent mixture drops to 160°C, it is mixed with the basalt aggregate according to the mass ratio and mixed for 40 seconds. Finally, limestone slag and lignin fiber are added according to the mass ratio and mixed for 40 seconds. The grading scheme of SMA-13 ​​in this scheme is shown in Table 20.

[0105] Table 20 SMA-13 ​​asphalt mixture gradation composition

[0106]

[0107] The specific steps of the construction method of the semi-assembled steel box girder bridge deck pavement structure involved are as follows:

[0108] Factory stage:

[0109] (a) A construction platform is set up in advance in the factory. The construction platform is embedded in the bottom to facilitate construction machinery and workers to work on the bridge deck. A simple tile steel roof is erected on the top to provide shelter, reduce the impact of environmental factors such as rain and wind, and improve construction efficiency. First, the steel bridge deck 2, i.e. the top plate of the steel box girder, is welded to the U-rib. The size of the steel bridge deck 2 is corrected by tensioning and other methods. Then, it is transported to the construction platform pre-set up in the factory. The steel bridge deck and the bottom of the U-rib structure are supported and fixed by jacks + steel columns, and the space is filled with sand. The four-piece continuous laying method is adopted to improve construction efficiency, shorten the construction period, and ensure the construction quality and schedule requirements. Figure 2 As shown; after that, the surface of the steel bridge deck 2 is cleaned, and then an automatic dust-free sandblasting machine is used to perform overall sandblasting and rust removal operations. The sandblasting and rust removal operation belt overlaps 5 cm, and finally a handheld grinder is used to manually grind the corners and pits of the steel bridge deck 2.

[0110] (b) First, check the rust removal status of the steel bridge deck 2 surface to determine whether the surface treatment quality meets the requirements. Then, cover the welding parts of the steel bridge deck 2 with a film during the later on-site construction to prevent the spraying from affecting the welding quality. Then, within 3 hours after the sandblasting and rust removal operation, perform the anti-corrosion spraying of the pre-laid anti-rust layer 3. Try to avoid defects such as sagging, spray leakage, dry spraying, and cracking. Once defects occur, deal with them in a timely manner. Each paint film overlaps the previous paint film by 1 / 3 of the area. After the anti-corrosion spraying is completed, test the tensile strength of the anti-rust layer 3 every 30 minutes. After the tensile strength reaches 7.5MPa, proceed to the next process.

[0111] (c) Use a spray truck to spread the epoxy resin adhesive twice, with a single spreading amount of 0.4 kg / m2 , leaked or insufficiently sprinkled areas should be corrected manually in time, and areas where the amount of spraying is excessive should be handled in time; the surface of the epoxy resin adhesive needs to be tested for bonding strength to ensure the construction quality of the pre-laid waterproof bonding layer 4; after spreading, cure for 14 hours;

[0112] (d) First, the pre-paved high-performance structural layer 5 is paved using a small asphalt concrete paver at a paving speed of 1.0 m / min. Then, the pre-paved high-performance structural layer 5 is rolled. The rolling operation is divided into three stages: first, initial compaction is performed using a rubber-wheel roller, with three rolling passes and a minimum operating temperature of 155°C; then, secondary compaction is performed using a steel-wheel roller, with four rolling passes and a minimum operating temperature of 120°C; and finally, final compaction is performed using a rubber-wheel roller, with four rolling passes and a minimum operating temperature of 95°C. Uncompacted mixture is removed and unpaved mixture is discarded. After curing for three days, excess epoxy asphalt mixture at the reserved welding positions of the steel bridge deck 2 is removed, and exposed steel portions on the upper surface of the steel bridge deck 2 are covered to prevent rust.

[0113] (e) The pre-paved high-performance structural layer 5 epoxy asphalt mixture is naturally cured for 7 days. During the curing period, the surface of the pre-paved high-performance structural layer 5 is kept clean. After the curing period, the steel box girder is welded as a whole. The U-ribs and substructure 1 are combined with the steel bridge deck 2 to form a "steel box girder + asphalt pavement" prefabricated component. During the overall welding process, attention should be paid to heat dissipation and protection of the pre-paved high-performance structural layer 5;

[0114] (f) First, the "steel box girder body + asphalt pavement" prefabricated components are transported to the site for hoisting, splicing and welding. Then, debris on the surface of the pre-laid high-performance structural layer 5 is cleaned, and the welded parts of the steel bridge deck 2 are manually polished and rust-removed. Be sure to remove surface steel chips at all times. Then, anti-corrosion spraying, epoxy resin adhesive laying and epoxy asphalt mixture pouring are carried out in sequence at the joints of the pre-laid anti-rust layer 3, the pre-laid waterproof bonding layer 4 and the pre-laid high-performance structural layer 5. The newly sprayed anti-rust layer must overlap the original anti-rust layer by 3 cm. Finally, the epoxy asphalt mixture at the joints is rolled by heavy ballasting or roller rolling. Since the epoxy asphalt mixture used in the pre-laid high-performance structural layer 5 has been cured for a long time before on-site construction, its performance has increased and it has obtained sufficient strength. Rolling the newly laid epoxy asphalt mixture with a roller will not cause overpressure on the original epoxy asphalt mixture.

[0115] (g) Use a spreader to spread the epoxy asphalt binder for bonding layer 6. The number of spreads is 2 times, and the amount of each spread is 0.35 kg / m 2 ; Manually brush the edges, corners and pits. Any missed or insufficient spraying should be corrected manually in time. Any excessive spraying should be handled promptly. Take protective measures after spraying to avoid pollution. Curing should be carried out for 8 hours after spraying.

[0116] (h) firstly coating the basalt crushed stone with an epoxy asphalt binder to produce a premixed asphalt basalt crushed stone, wherein the overall temperature of the premixed asphalt basalt crushed stone is maintained at 130° C., and then laying the embedded crushed stone layer 7 using a crushed stone spreader;

[0117] (i) First, the wearing layer 8 is paved using a double-machine asphalt paver with a longitudinal spacing of 15 m and a paving speed of 1.5 m / min. Then, the wearing layer 8 is rolled in three stages: first, initial compaction using a steel wheel roller with four rolling passes at a minimum operating temperature of 135°C; then, secondary compaction using a steel wheel roller with three rolling passes at a minimum operating temperature of 100°C; and finally, final compaction using a steel wheel roller with four rolling passes at a minimum operating temperature of 75°C. During the paving operation, attention should be paid to weather conditions and the construction schedule should be arranged. In case of sudden rain, construction should be stopped immediately and any uncompacted mixture should be removed. Thus, the entire construction process of the semi-assembled steel box girder bridge deck pavement structure is completed.

[0118] Example 2

[0119] The semi-assembled steel box girder bridge deck pavement structure used in Example 2 is the same as that in Example 1, except that the gradation of the warm-mix SBS modified mastic asphalt crushed stone mixture SMA-13 ​​of the wearing layer 8 is different from that in Example 1 and the thickness of the wearing layer 8 is 35 mm.

[0120] The gradation scheme of the warm-mix SBS modified mastic asphalt crushed stone mixture SMA-13 ​​of the wearing layer 8 is shown in Table 21.

[0121] Table 21 SMA-13 ​​asphalt mixture gradation composition in Example 2

[0122]

[0123] The performance test results of the semi-assembled steel box girder bridge deck pavement structure of Implementation Example 1 and Implementation Example 2 are shown in Table 22:

[0124] Table 22 Performance test of semi-assembled steel box girder bridge deck pavement structure

[0125]

[0126] Note: The comparative example is a commonly used steel bridge deck pavement structure, with the lower layer being epoxy asphalt mixture EA-10 and the upper layer being ordinary mastic asphalt crushed stone mixture SMA-13.

[0127] As can be seen from Table 22, the performance of the semi-assembled steel box girder bridge deck pavement structure of the present invention can meet the technical requirements of steel bridge deck pavement. Compared with traditional steel bridge deck pavement structures that are mainly constructed on site, the present invention has the following advantages:

[0128] (1) Performance advantages: high quality stability, easy maintenance, excellent service performance, good deformation coordination, and long service life;

[0129] (2) Construction advantages: fast construction speed, high degree of mechanization, small land demand, and low demand for organizational and coordination skills;

[0130] (3) Environmental advantages: fewer quality defects, low scrap rate, low on-site construction temperature, and less waste gas and carbon dioxide emissions;

[0131] (4) Application advantages: strong anti-interference ability, adaptable to various construction environments, etc.

[0132] At the same time, damage to the pavement structure is limited to the wear layer, requiring only periodic milling and overlay repairs. Over its long service life, no major reconstruction of the pavement structure is required, reducing maintenance costs and aligning with energy conservation and environmental protection. This invention has broad application prospects in ecologically fragile areas with a large demand for bridge construction, as well as in cities that require rapid construction of viaducts to disperse traffic.

[0133] The applicant declares that the above-mentioned specific implementation cases are only preferred embodiments of the present invention, used to illustrate the structural details and construction methods of the present invention, but the present invention is not limited to the above-mentioned structures and construction methods. For those skilled in the art, any modifications and embellishments made to the present invention that do not require creative work and do not depart from the principles of the present invention are within the scope of protection and disclosure of the present invention. The above description is only used to help understand the method and core concept of the present invention. Therefore, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A construction method for a semi-assembled steel box girder bridge deck pavement structure, characterized in that: It consists of two phases and nine steps: Factory stage: Step 1: First, weld the U-rib and the U-rib portion of the lower structure (1) to the steel bridge deck (2), and then perform dimensional correction on the steel bridge deck (2); Afterwards, the surface of the steel bridge deck (2) is cleaned of attachments and debris, multiple steel bridge decks (2) are fixed and supported, followed by overall sandblasting to remove rust, and finally, the edges, corners and concave areas of the steel bridge deck (2) are manually polished; Step 2: Cover the welding parts of the steel bridge deck (2) during the later on-site construction to prevent the spraying from affecting the welding quality in step 6; then, perform the anti-corrosion spraying of the pre-laid anti-rust layer (3) within 2 to 5 hours after the sandblasting and rust removal operation in step 1; Step 3: using a spreading vehicle to spread the epoxy resin adhesive of the pre-laid waterproof bonding layer (4); Step 4: first, perform a paving operation of the pre-laid high-performance structural layer (5), and then perform a rolling operation of the pre-laid high-performance structural layer (5); wherein the rolling operation is divided into three stages: first, perform an initial rolling operation, using a rubber-wheel roller, rolling 3 to 5 times, and the minimum operating temperature is 155°C; then perform a secondary rolling operation, using a steel-wheel roller, rolling 4 to 5 times, and the minimum operating temperature is 120°C; and finally, perform a final rolling operation, using a rubber-wheel roller, rolling 4 to 5 times, and the minimum operating temperature is 95°C; after curing for 3 days, remove the epoxy asphalt mixture at the reserved welding position of the steel bridge deck; Step 5: After the high-performance structural layer (5) epoxy asphalt mixture is naturally cured for 7 to 9 days, the U-rib and the lower structure (1) are welded to the steel bridge deck (2) to form a "steel box girder body + asphalt pavement" prefabricated part; On-site stage: Step 6: First, transport the "steel box girder body + asphalt pavement" prefabricated parts to the site, carry out the hoisting and splicing of the "steel box girder body + asphalt pavement", and complete the welding of the steel box girder body into the bridge; then clean the surface debris of the pre-laid high-performance structural layer (5), and manually polish and remove rust from the welding parts of the steel bridge deck (2); then, carry out anti-corrosion spraying, epoxy resin adhesive laying, and epoxy asphalt mixture pouring at the joints of the pre-laid anti-rust layer (3), the pre-laid waterproof bonding layer (4), and the pre-laid high-performance structural layer (5); finally, use heavy ballasting or roller rolling to roll the epoxy asphalt mixture at the joints; Step 7: using a spreading vehicle to spread the epoxy asphalt binder of the bonding layer (6); Step 8: First, the basalt gravel is coated with epoxy asphalt binder to obtain premixed asphalt basalt gravel, and then a gravel spreader is used to lay the embedded gravel layer (7); Step 9, first perform the paving operation of the wearing layer (8); then perform the rolling operation of the wearing layer (8); the rolling operation is divided into three stages: first, perform the initial rolling, using a steel wheel roller, the rolling number is 4 to 5 times, the minimum operating temperature is 135°C, then perform the secondary rolling, using a steel wheel roller, the rolling number is 3 to 4 times, the minimum operating temperature is 100°C, and finally perform the final rolling, using a steel wheel roller, the rolling number is 4 to 5 times, the minimum operating temperature is 75°C.

2. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 1, characterized in that: The semi-assembled steel box girder bridge deck pavement structure comprises: a steel bridge deck (2), a pre-laid anti-rust layer (3), a pre-laid waterproof bonding layer (4), a pre-laid high-performance structural layer (5), a bonding layer (6), an embedded crushed stone layer (7) and a wear layer (8) are sequentially arranged on the U-rib and the lower structure (1) from bottom to top; The pre-laid anti-rust layer (3) and the pre-laid high-performance structural layer (5) are bonded via a pre-laid waterproof bonding layer (4); the pre-laid high-performance structural layer (5) and the wear layer (8) are bonded via a bonding layer (6); and the embedded crushed stone layer (7) is embedded between the bonding layer (6) and the wear layer (8); The U-rib and the lower structure (1), and the steel bridge deck (2) constitute a steel box girder body, and the U-rib and the lower structure (1), the steel bridge deck (2), the pre-laid anti-rust layer (3), the pre-laid waterproof bonding layer (4), and the pre-laid high-performance structural layer (5) constitute a "steel box girder body + asphalt pavement" prefabricated component; The pre-paved high-performance structural layer (5) is paved using epoxy asphalt mixture EA-10; The wearing layer (8) is paved with a warm-mix SBS modified mastic asphalt crushed stone mixture SMA-13.

3. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 2, characterized in that: The epoxy asphalt mixture EA-10 is prepared by mixing epoxy asphalt, basalt aggregate and mineral powder in a mass ratio of 6.4-6.8:91-93:6-9; wherein the epoxy asphalt is prepared by mixing base asphalt, bisphenol A epoxy resin and methyl hexahydrophthalic anhydride curing agent in a mass ratio of 18-21:10:9-11; and the thickness of the pre-laid high-performance structural layer (5) is 30-40 mm.

4. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 2, characterized in that: The warm mix SBS modified asphalt mastic macadam mixture SMA-13 ​​is prepared by mixing SBS modified asphalt, warm mix agent, basalt aggregate, mineral powder and lignin fiber in a mass ratio of 6.3-6.5:0.2-0.35:90-93:7-10:0.3-0.4; the thickness of the wearing layer (8) is 30-45 mm.

5. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 2, characterized in that: The pre-applied anti-rust layer (3) is sprayed with water-based epoxy resin zinc-rich paint for corrosion protection. The water-based epoxy resin zinc-rich paint is prepared by reacting a modified water-based epoxy resin, a modified polyamine curing agent, and zinc powder in a mass ratio of 6:2 to 3:15 to 17; the modified water-based epoxy resin is prepared by reacting a water-based epoxy resin, deionized water, a dispersant, a defoaming agent, and a substrate wetting agent in a mass ratio of 18:5 to 6:0.2:0.5:0.8 to 1.0; the thickness of the pre-applied anti-rust layer (3) is 60 to 80 μm.

6. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 2, characterized in that: The pre-laid waterproof bonding layer (4) is sprayed and laid using epoxy resin bonding material, wherein the epoxy resin bonding material is prepared by mixing epoxy resin and epoxy resin toughening curing agent in a mass ratio of 4:0.9-1.1; the amount of epoxy resin bonding material used is 0.60-0.95 kg / m 2 .

7. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 2, characterized in that: The bonding layer (6) is sprayed with epoxy asphalt bonding material, which is composed of epoxy resin, epoxy resin toughening curing agent, and matrix asphalt in a mass ratio of 4:0.9-1.1:4.9-5.1; the amount of epoxy asphalt bonding material is 0.55-0.8 kg / m 2 .

8. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 2, characterized in that: The embedded crushed stone layer (7) is laid using premixed asphalt basalt crushed stone. The premixed asphalt basalt crushed stone is composed of basalt crushed stone and epoxy asphalt binder. The epoxy asphalt binder is composed of epoxy resin, epoxy resin toughening curing agent, and matrix asphalt in a mass ratio of 4:0.9-1.1:4.9-5.

1. The particle size of the basalt crushed stone is 2.36-4.75 mm. The amount of premixed asphalt basalt crushed stone is 1.2-1.4 kg / m 2 .

9. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 1, characterized in that: In step 2, during the anti-corrosion spraying process, each coat of paint overlaps the previous coat by 1 / 4 to 1 / 3 of the area; In step 4, a small asphalt concrete paver is used for paving at a speed of 1.0 to 1.5 m / min; In step 9, the paving operation uses two asphalt concrete pavers for continuous paving at a speed of 1.0 to 1.5 m / min.

10. The construction method of the semi-assembled steel box girder bridge deck pavement structure according to claim 2, characterized in that: The preparation method of the epoxy resin adhesive of the pre-laid waterproof adhesive layer (4) is as follows: first, the epoxy resin and the epoxy resin toughening curing agent are cyclically heated to 55°C to 65°C and 50°C to 60°C respectively, then the epoxy resin and the epoxy resin toughening curing agent are mixed according to the mass ratio, stirred for 4 to 5 minutes, and mixed evenly; The preparation method of the epoxy asphalt binder of the bonding layer (6) is as follows: first, heating the matrix asphalt to 155-165°C, cyclically heating the epoxy resin and the epoxy resin toughening curing agent to 55-65°C and 50-60°C respectively, then mixing the matrix asphalt and the epoxy resin toughening curing agent according to the mass ratio, stirring for 3-4 minutes, then adding the epoxy resin according to the mass ratio, stirring for 4-5 minutes, and mixing evenly; The preparation method of the epoxy asphalt mixture EA-10 for the pre-laid high-performance structural layer (5) is as follows: first, bisphenol A epoxy resin and methyl hexahydrophthalic anhydride curing agent are cyclically heated to 60-70° C. and 50-60° C. respectively, the base asphalt is heated to 150-160° C., and the aggregate is heated to 170-190° C.; then, the base asphalt and the methyl hexahydrophthalic anhydride curing agent are mixed according to a mass ratio and stirred for 40-45 seconds; then, bisphenol A epoxy resin is added according to a mass ratio and stirred for 40-45 seconds to obtain epoxy asphalt; then, the epoxy asphalt is added to the prepared basalt aggregate and stirred for 40-45 seconds, and finally, mineral powder is added according to a mass ratio and stirred for 40-45 seconds; The preparation method of the warm-mix SBS modified asphalt mastic crushed stone mixture SMA-13 ​​for the wearing layer (8) is as follows: first, the SBS modified asphalt is heated to 160°C to 170°C, and the basalt aggregate is heated to 180°C to 190°C; then, the warm-mix agent is added to the SBS modified asphalt according to a mass ratio; then, after the temperature of the SBS modified asphalt and warm-mix agent mixture drops to 160°C, it is mixed with the basalt aggregate according to a mass ratio and stirred for 40 to 45 seconds; finally, mineral powder and lignin fiber are added according to a mass ratio and stirred for 40 to 45 seconds.

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