CN216615495U - Fireproof, anticorrosive, sealed and wrapped composite structure for main cable of suspension bridge - Google Patents
Fireproof, anticorrosive, sealed and wrapped composite structure for main cable of suspension bridge Download PDFInfo
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- CN216615495U CN216615495U CN202123279523.9U CN202123279523U CN216615495U CN 216615495 U CN216615495 U CN 216615495U CN 202123279523 U CN202123279523 U CN 202123279523U CN 216615495 U CN216615495 U CN 216615495U
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Abstract
The utility model discloses a fireproof, anticorrosive, sealed and wrapped composite structure for a main cable of a suspension bridge, which comprises steel wires of the main cable of the suspension bridge, and is characterized in that: the surface of the main cable steel wire of the suspension bridge is sequentially wrapped with an MS double-component sealing adhesive layer, a wire wrapping layer, an MS single-component sealing adhesive layer, a fireproof wrapping composite layer, an MS flame-retardant sealing adhesive layer and a coating layer from inside to outside; the fireproof wrapping composite layer consists of an aerogel felt wrapping layer and a plurality of fireproof steel hoops; the fire-resistant steel hoop is used for binding and fixing the aerogel felt wrapping layer. The whole structure of the utility model is simple in design, and the sealing and shielding are excellent; the fireproof steel hoop is adopted to ensure that the aerogel felt wrapping layer is reliable in wrapping and cannot be dispersed or fall off when meeting fire, so that the fireproof reliability of the whole structure is ensured; all the structural materials are clean and environment-friendly, the whole system is simple and quick in construction, the protection is lasting, and good economic and social benefits are achieved.
Description
Technical Field
The utility model relates to a fireproof and anticorrosive sealing wrapping structure for a steel structure, and belongs to the technical field of bridge engineering construction.
Background
The main cable is a permanent component which cannot be replaced in a suspension bridge structure, the dead weight of a main beam and the live load of a bridge deck are transmitted to the main tower and the anchorage, the safety and the service life of the whole bridge are determined, and the main cable anticorrosion and fireproof technology is always widely regarded by the inside and the outside of the industry.
The coating sealing anticorrosion system adopted by JT/T694-2007 anticorrosion coating technical conditions of suspension bridge main cable systems, the bridge cable anticorrosion wrapping belt technology formulated by rubber miscellaneous goods of rubber and rubber product standardization technical committee in China, GB/T32120 Steel structure oxidative polymerization type coating corrosion control technology, and the like, the adopted putty material, chlorosulfonated polyethylene (CSM) wrapping belt and other materials, PCT wrapping material and the like, the anti-corrosion performance is good, but the fire-proof performance is general, if a bridge fire disaster is caused by a serious traffic accident, particularly, when the bridge is on fire and the temperature of the steel wire of the cable reaches above 400 ℃, the bearing capacity of the main cable is sharply reduced due to the reduction of the elastic modulus change of the steel wire at high temperature, the full bridge is collapsed seriously, serious group death and group injury serious safety accidents are caused, and the traffic capacity of the whole bridge is remarkably reduced and the service life of the whole bridge is greatly shortened at light weight.
CN2018210572299 provides an aerogel applied to corrosion prevention and heat insulation of a main cable of a suspension bridge, wherein an aerogel layer, a winding steel wire layer, a primer layer, an intermediate paint layer and a finish paint layer are sequentially arranged on an outer ring of a main cable section between any two adjacent cable clamps of the main cable outwards, so that the influence of a temperature effect on the safety coefficient of the main cable is reduced, the service life of the main cable is prolonged, but the aerogel is designed on the surface of the steel wire of the main cable of the suspension bridge and then wrapped by the winding steel wire of the main cable, and firstly, the aerogel is extruded and deformed by the winding steel wire and even damaged; secondly, the aerogel is wound on the surface of the steel wire of the hexagonal suspension bridge main cable by a winding wire and is difficult to ensure to form a complete and compact layered protection structure, and the fireproof and even anticorrosive performance of the aerogel can not be ensured.
CN202110492575X discloses a method for manufacturing a fireproof coating structure of a main bridge cable, a main bridge cable and a main bridge cable, wherein the fireproof coating structure of the main bridge cable is applied to the surface of a cable, a primer layer, a sealing layer, an aerogel fireproof composite layer and a silicon inorganic material composite coating are sequentially arranged from inside to outside, so as to solve the problems of poor fireproof performance and no icing prevention of the cable in the prior art, the main problems are that the aerogel fireproof composite layer is bonded with an aerogel felt by adopting a high-temperature silicone sealant in the construction process, and the outer surface of the aerogel fireproof composite layer is only wrapped by an aluminum foil tape, so that once a fire occurs, no matter the silicon inorganic material composite coating formed by an acrylic polyurethane coating on the surface and a silicon inorganic material coating, or the aluminum foil tape on the surface layer in the aerogel fireproof composite layer, the silicon inorganic material composite coating and the silicon inorganic material coating are difficult to resist the high temperature of thousands of the fire, when the coating structure is burnt by a big fire and is impacted by an air current, the aerogel felt can directly bear flame impact or on-site high-temperature flame flow impact, and the aerogel felt is easy to fall off to cause the aerogel fireproof composite layer to lose the fireproof effect.
In addition, the technical design adopts multi-pass paint coating, so that the process is complicated, the anti-corrosion effect cannot be increased, and the serious hidden danger of environmental pollution is brought to a construction site.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a fireproof, anti-corrosion, sealing, and wrapping composite structure for a main cable of a suspension bridge, which solves the hidden danger that a aerogel fireproof composite layer may fall off in a fire scene in a fireproof coating structure for the main cable, solves the serious hidden danger of environmental pollution in the fireproof coating structure for the main cable, and simplifies the fireproof coating structure for the main cable while ensuring the fireproof, anti-corrosion, reliability and durability of the whole fireproof, anti-corrosion, sealing, and wrapping composite structure for the main cable of the suspension bridge.
The utility model solves the problems of the prior art by adopting the specific scheme as follows: a fireproof and anticorrosive sealing and wrapping composite structure for a main cable of a suspension bridge comprises a steel wire of the main cable of the suspension bridge, wherein an MS double-component sealing adhesive layer, a wire wrapping layer, an MS single-component sealing adhesive layer, a fireproof wrapping composite layer, an MS flame-retardant sealing adhesive layer and a coating layer are sequentially wrapped on the surface of the steel wire of the main cable of the suspension bridge from inside to outside;
the fireproof wrapping composite layer consists of an aerogel felt wrapping layer and a plurality of fireproof steel hoops; the refractory steel hoop is used for binding and fixing the aerogel felt wrapping layer.
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the thickness of the MS double-component sealant layer is 2mm-10 mm.
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the thickness of the MS single-component sealant layer is 2 mm-5 mm.
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the thickness of the aerogel felt wrapping layer is 2mm-10mm
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the refractory steel hoop is in a band shape or a net shape, and the thickness of the refractory steel hoop is 0.1mm-2 mm.
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the distance between two adjacent refractory steel hoops is 300-500 mm.
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the thickness of the MS flame-retardant sealant layer is 2 mm-5 mm.
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the coating layer is a weather-resistant finish paint coating layer, and the thickness of the coating layer is 0.05 mm-0.1 mm.
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the coating layer is a fireproof coating layer, and the thickness of the coating layer is 0.5 mm-2 mm.
The preferable scheme of the fireproof, anticorrosive, sealed and wrapped composite structure of the main cable of the suspension bridge is as follows: the surface of the fireproof coating is provided with a finish coating, and the thickness of the finish coating is 0.05 mm-0.1 mm.
The MS two-component sealant has the thickness of 2-10 mm, has the advantages of long construction period of 2-4h, low modulus, high elongation and good adhesion, is used for filling joints, rounding and sealing protection of the surface of the main cable steel wire before wire winding, does not influence the wire winding operation, is gradually vulcanized to form a sealing protection layer with strong adhesive force and excellent elasticity after wire winding, and further improves the leakage prevention capability of an outer protection system to compressed dry air in the main cable.
The thickness of the MS single-component sealant layer is 2 mm-5mm, the MS single-component sealant in the prior art is successfully applied to main cable sealing protection engineering for more than ten years, and the adhesion and the sealing performance are reliably verified.
The thickness of the aerogel felt wrapping layer is 2mm-10mm, the existing aerogel felt is generally products with common thicknesses of 1mm, 2mm, 3mm and the like, and at least 2 layers of aerogel felts are wrapped to ensure the fireproof performance. 30-50% of aerogel felts are overlapped when wrapped, so that the fact that no penetrating joint reaching the surface of the main cable exists in the aerogel felt wrapping layer is guaranteed, or the fact that the wrapping is staggered when the 2 nd layer of aerogel felts are wrapped and the joint of the first layer of aerogel felts is completely wrapped is guaranteed, the fact that the whole aerogel felt wrapping layer is continuous, tight and free of flash seams and leaking seams is achieved, and the fireproof effect is guaranteed.
The fire-resistant steel hoop is in a strip shape or a net shape, is made of the existing fire-resistant steel plate according to the prior art, and has the thickness of 0.1mm-2 mm. After the aerogel felt wrapping layer starts to wrap from the main cable clamp, a fire-resistant steel hoop is used for tightening and hooping the aerogel felt wrapping layer at the starting position at the position close to the cable clamp, then the aerogel felt wrapping layer is wrapped according to the fire-proof design requirement, a new fire-resistant steel hoop is arranged at the position 300mm-500mm away from the last fire-resistant steel hoop, the wrapped aerogel felt wrapping layer is tightened and hooped, the operation is continuously carried out in such a way until the aerogel felt wrapping layer is wrapped to the next cable clamp and is closed, a fire-resistant steel hoop is arranged after the closing, the wrapped aerogel felt wrapping layer is tightened and hooped, and the wrapping operation of the main cable aerogel felt wrapping layer between 2 cable clamps on the main cable of the suspension bridge is completed. The fire-resistant steel has good fire resistance, and the aerogel felt twines the covering and tightens up behind the hoop through fire-resistant steel hoop and cramps, can effectively resist the burning and the flame stream impact of scene of a fire, guarantees that the aerogel felt twines the covering complete, effectively resists the conflagration, and the performance fire prevention effect guarantees the safety of scene of a fire main push-towing rope.
The MS flame-retardant sealant has the thickness of 2 mm-5mm, has good bonding, stretch-proofing and sealing protection performances of the MS sealant, has the flame retardance reaching FV-0 level and can effectively prevent flame from burning and spreading along the surface of a main cable.
The coating layer is a weather-resistant finish paint coating layer, and the thickness of the coating layer is 0.05 mm-0.1 mm. The coating layer is formed by adopting weather-resistant finish paint in the prior art, such as polyurethane finish paint, fluorocarbon finish paint, polysiloxane finish paint, silicon resin finish paint and nano-modified or graphene modified finish paint. The coating layer can provide weather-proof and ageing-resistant protection effects for the MS flame-retardant sealing adhesive layer and the whole suspension bridge main cable fireproof, anticorrosive, sealing and wrapping composite structure while improving the decoration performance and bridge appearance of the main cable, and further improves the fireproof, anticorrosive performance and durability of the whole suspension bridge main cable fireproof, anticorrosive, sealing and wrapping composite structure.
The coating can also be a fireproof coating, such as an outdoor ultrathin fireproof coating, an outdoor finishing fireproof coating and the like, and the thickness of the coating can be 0.5-2 mm in view of the fact that the fireproof and anticorrosion sealing and wrapping composite structure of the main cable of the whole suspension bridge does not depend on the coating to realize fireproof protection. In order to improve the durability of the fireproof paint coating, the surface of the fireproof paint coating can be coated with a finish paint coating for protection, wherein the thickness of the finish paint coating is 0.05 mm-0.1 mm.
The weather-resistant finish paint can be preferably a water-based finish paint, when the water-based finish paint is adopted, the surface of the water-based finish paint coating is additionally coated with a layer of silicon resin paint, and the thickness of the silicon resin paint coating is 0.01mm-0.08 mm.
The utility model has the beneficial effects that:
the whole structure system of the utility model has simple coating structure and excellent sealing and shielding; the refractory steel hoop is designed to ensure that the aerogel felt wrapping layer is reliable in wrapping and cannot be dispersed or fall off when meeting fire, so that the fire prevention reliability of the whole structure is ensured; all the structural materials are clean and environment-friendly, the whole system is simple and quick in construction, the protection is lasting, and good economic and social benefits are achieved. After the structure sample preparation, the detection of an authority agency is carried out, the temperature of the structure does not exceed 300 ℃ in a 1200 ℃ fire scene after 3 hours, the shape of the whole fireproof and anticorrosion sealing and wrapping composite structure is kept complete, and a good fireproof protection effect is obtained.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an aqueous weatherable topcoat coating and a silicone paint coating;
FIG. 3 is a schematic view of the construction of the fire retardant coating and topcoat coatings;
in the figure: the steel wire comprises a 1-suspension bridge main cable steel wire, a 2-MS double-component sealing glue layer, a 3-filament winding layer, a 4-MS single-component sealing glue layer, a 5-fireproof wrapping composite layer, a 6-MS flame-retardant sealing glue layer, a 7-coating, a 7.1-water-based weather-resistant finish coating, a 7.2-silicone resin coating, a 7.3-fireproof coating, a 7.4-finish coating and an 8-fire-resistant steel hoop.
Detailed Description
The scheme and the effect of the utility model are further clarified by the following embodiments and the attached drawings:
example 1
As shown in fig. 1, a suspension bridge main cable fireproof, anticorrosive, sealing and wrapping composite structure comprises a suspension bridge main cable steel wire 1, wherein the surface of the suspension bridge main cable steel wire 1 is sequentially wrapped with an MS two-component sealant layer 2, a wire wrapping layer 3, an MS one-component sealant layer 4, a fireproof wrapping composite layer 5, an MS flame-retardant sealant layer 6 and a coating layer 7 from inside to outside; wherein the fireproof wrapping composite layer 5 is composed of an aerogel felt wrapping layer and a fireproof steel hoop 8, namely after the aerogel wrapping layer is wrapped, the outer surface of the aerogel wrapping composite layer is bound and fixed to be formed by the fireproof steel hoop 8 made of fireproof steel.
The thickness of the MS two-component sealant layer is 2mm-8mm, the MS two-component sealant in the prior art is adopted to be mixed on site, the mixture is blade-coated on the surface of the suspension bridge main cable steel wire 1, gaps on the surface of the suspension bridge main cable steel wire 1 are filled, the MS two-component sealant layer 2 is formed after the mixture is basically rounded, and then a wire winding machine is adopted to wind the suspension bridge main cable steel wire 1 forming the MS two-component sealant layer 2 to form a wire winding layer 3; coating MS single-component sealant on the filament winding layer 3 by adopting the prior art, and strickling and rounding to form an MS single-component sealant layer 4, wherein the thickness is controlled to be 2-5 mm; then, the aerogel felt is wrapped on the surface of the MS single-component sealing glue layer 4 to form an aerogel felt wrapping layer, a fireproof wrapping composite layer 5 is formed by binding and fixing the wrapped aerogel felt by using a fireproof steel hoop 8 in the wrapping process, the aerogel felt wrapping layer is guaranteed to be wrapped for at least 2 times according to design requirements and the thickness of the adopted aerogel felt, no penetrating joint reaching the surface of the main cable exists in the aerogel felt wrapping layer, the thickness of the fireproof wrapping composite layer 5 can be 2mm-6mm, and the fireproof steel hoop can be in a belt shape or a net shape and is 0.1mm-0.5mm in thickness. After the aerogel felt wrapping layer is wrapped from the main cable clamp, a fire-resistant steel hoop is used for tightening and hooping the aerogel felt wrapping layer at the starting position at the position close to the cable clamp, then the aerogel felt wrapping layer is wrapped according to the fire-proof design requirement, a new fire-resistant steel hoop is arranged at the position 500mm away from the last fire-resistant steel hoop, the wrapped aerogel felt wrapping layer is tightened and hooped, the operation is continuously carried out in such a way until the aerogel felt wrapping layer is wrapped to the tail of the next cable clamp, a fire-resistant steel hoop is arranged after the tail is closed, the wrapped aerogel felt wrapping layer is tightened and hooped, and the wrapping operation of the main cable aerogel felt wrapping layer among 2 cable clamps on the main cable of the suspension bridge is completed.
Coating MS flame-retardant sealant in the prior art on the finished fireproof wrapping composite layer 5 in a scraping way, and forming an MS flame-retardant sealant layer 6 after the MS flame-retardant sealant layer is flattened and rounded, wherein the thickness of the MS flame-retardant sealant layer is 2-5 mm; and then coating the surface of the MS flame-retardant sealant layer 6 to form a coating 7 by coating fluorocarbon finish, wherein the thickness of the coating 7 is 0.05-0.1 mm, and the fluorocarbon finish can be coated for 1-2 times.
And after the coating 7 is coated, forming the fireproof, anticorrosive, sealing and wrapping composite structure of the main cable of the suspension bridge. The MS flame-retardant sealing adhesive layer and the whole suspension bridge main cable fireproof, anticorrosive, sealing and wrapping composite structure can be protected from weather and aging, and the fireproof, anticorrosive and wrapping composite structure of the whole suspension bridge main cable fireproof, anticorrosive and wrapping composite structure is further improved in fireproof, anticorrosive and durability.
Example 2
As shown in fig. 1 and 2, a suspension bridge main cable fireproof, anti-corrosion, sealing and wrapping composite structure comprises a suspension bridge main cable steel wire 1, wherein an MS two-component sealing adhesive layer 2, a wire wrapping layer 3, an MS one-component sealing adhesive layer 4, a fireproof wrapping composite layer 5, an MS flame-retardant sealing adhesive layer 6 and a coating layer 7 are sequentially wrapped on the surface of the suspension bridge main cable steel wire 1 from inside to outside; wherein the fireproof wrapping composite layer 5 is composed of an aerogel felt wrapping layer and a fireproof steel hoop 8, namely after the aerogel wrapping layer is wrapped, the outer surface of the aerogel wrapping composite layer is bound and fixed to be formed by the fireproof steel hoop 8 made of fireproof steel.
The coating layer 7 consists of a water-based weather-resistant finish coat layer 7.1 and a silicon resin coating layer 7.2, namely a layer of water-based polyurethane finish coat is coated on the surface of the MS flame-retardant sealant layer 6 to form the water-based weather-resistant finish coat layer 7.1, and the thickness is 0.04 mm-0.06 mm; then coating a silicone resin coating on the water-based weather-resistant finish coat 7.1 to form a silicone resin coating 7.2 with the thickness of 0.01 mm-0.04 mm; the total thickness of the coating layer 7 is controlled to be 0.05 mm-0.1 mm.
Example 3
As shown in fig. 1, a suspension bridge main cable fireproof, anticorrosive, sealing and wrapping composite structure comprises a suspension bridge main cable steel wire 1, wherein the surface of the suspension bridge main cable steel wire 1 is sequentially wrapped with an MS two-component sealant layer 2, a wire wrapping layer 3, an MS one-component sealant layer 4, a fireproof wrapping composite layer 5, an MS flame-retardant sealant layer 6 and a coating layer 7 from inside to outside; wherein the fireproof wrapping composite layer 5 is composed of an aerogel felt wrapping layer and a fireproof steel hoop 8, namely after the aerogel wrapping layer is wrapped, the outer surface of the aerogel wrapping composite layer is bound and fixed to be formed by the fireproof steel hoop 8 made of fireproof steel.
The coating layer 7 is formed by coating a fireproof paint, namely the outdoor ultrathin fireproof paint in the prior art is coated on the surface of the MS flame-retardant sealing glue layer 6, and the thickness of the coating layer 7 is 0.5 mm-2 mm.
Example 4
As shown in fig. 1 and 3, a suspension bridge main cable fireproof, anti-corrosion, sealing and wrapping composite structure comprises a suspension bridge main cable steel wire 1, wherein an MS two-component sealing adhesive layer 2, a wire wrapping layer 3, an MS one-component sealing adhesive layer 4, a fireproof wrapping composite layer 5, an MS flame-retardant sealing adhesive layer 6 and a coating layer 7 are sequentially wrapped on the surface of the suspension bridge main cable steel wire 1 from inside to outside; wherein the fireproof wrapping composite layer 5 is composed of an aerogel felt wrapping layer and a fireproof steel hoop 8, namely after the aerogel wrapping layer is wrapped, the outer surface of the aerogel wrapping composite layer is bound and fixed to be formed by the fireproof steel hoop 8 made of fireproof steel.
The coating layer 7 is formed by a fireproof coating layer 7.3 and a finish coat layer 7.4, namely, the outdoor ultrathin fireproof coating in the prior art is coated on the surface of the MS flame-retardant sealant layer 6 to form the fireproof coating layer 7.3 with the thickness of 0.3 mm-1.7 mm; then coating a silicon resin coating on the fireproof coating 7.3 to form a finish coating 7.4 with the thickness of 0.02 mm-0.05 mm; the total thickness of the coating layer 7 is controlled to be 0.32 mm-1.75 mm.
Claims (10)
1. The utility model provides a suspension bridge main push-towing rope fire prevention anticorrosion seals twines package composite construction, includes suspension bridge main push-towing rope steel wire, its characterized in that: the surface of the main cable steel wire of the suspension bridge is sequentially wrapped with an MS double-component sealing adhesive layer, a wire winding layer, an MS single-component sealing adhesive layer, a fireproof winding composite layer, an MS flame-retardant sealing adhesive layer and a coating layer from inside to outside;
the fireproof wrapping composite layer consists of an aerogel felt wrapping layer and a plurality of fireproof steel hoops; the refractory steel hoop is used for binding and fixing the aerogel felt wrapping layer.
2. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure according to claim 1, wherein: the thickness of the MS double-component sealant layer is 2mm-10 mm.
3. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure according to claim 1, wherein: the thickness of the MS single-component sealant layer is 2 mm-5 mm.
4. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure according to claim 1, wherein: the thickness of the aerogel felt wrapping layer is 2mm-10 mm.
5. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure according to claim 1, wherein: the refractory steel hoop is in a band shape or a net shape, and the thickness of the refractory steel hoop is 0.1mm-2 mm.
6. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure according to claim 5, wherein: the distance between two adjacent refractory steel hoops is 300-500 mm.
7. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure according to claim 1, wherein: the thickness of the MS flame-retardant sealant layer is 2 mm-5 mm.
8. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure according to claim 1, wherein: the coating layer is a weather-resistant finish paint coating layer, and the thickness of the coating layer is 0.05 mm-0.1 mm.
9. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure according to claim 1, wherein: the coating layer is a fireproof coating layer, and the thickness of the coating layer is 0.5 mm-2 mm.
10. The suspension bridge main cable fireproof anticorrosion sealing wrapping composite structure of claim 9, wherein: the surface of the fireproof coating is provided with a finish coating, and the thickness of the finish coating is 0.05 mm-0.1 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123279523.9U CN216615495U (en) | 2021-12-24 | 2021-12-24 | Fireproof, anticorrosive, sealed and wrapped composite structure for main cable of suspension bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123279523.9U CN216615495U (en) | 2021-12-24 | 2021-12-24 | Fireproof, anticorrosive, sealed and wrapped composite structure for main cable of suspension bridge |
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| CN202123279523.9U Active CN216615495U (en) | 2021-12-24 | 2021-12-24 | Fireproof, anticorrosive, sealed and wrapped composite structure for main cable of suspension bridge |
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