CN111549666A - Fire-resistant stay cable and manufacturing method thereof - Google Patents
Fire-resistant stay cable and manufacturing method thereof Download PDFInfo
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- CN111549666A CN111549666A CN202010495508.9A CN202010495508A CN111549666A CN 111549666 A CN111549666 A CN 111549666A CN 202010495508 A CN202010495508 A CN 202010495508A CN 111549666 A CN111549666 A CN 111549666A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 230000009970 fire resistant effect Effects 0.000 title claims description 25
- 239000004744 fabric Substances 0.000 claims abstract description 38
- 239000004698 Polyethylene Substances 0.000 claims abstract description 33
- 229920000573 polyethylene Polymers 0.000 claims abstract description 33
- 238000009413 insulation Methods 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 239000012943 hotmelt Substances 0.000 claims abstract description 15
- 238000004321 preservation Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- -1 polyethylene Polymers 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 11
- 229920002748 Basalt fiber Polymers 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 6
- 239000004642 Polyimide Substances 0.000 claims description 4
- 229920004933 Terylene® Polymers 0.000 claims description 4
- 229920006231 aramid fiber Polymers 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004677 Nylon Substances 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 239000003870 refractory metal Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 33
- 230000000694 effects Effects 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000003063 flame retardant Substances 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000004114 Ammonium polyphosphate Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 1
- 229920001276 ammonium polyphosphate Polymers 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/40—Plastics
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ropes Or Cables (AREA)
Abstract
The invention discloses a fireproof-based stay cable structure and a manufacturing method thereof, wherein the fireproof-based stay cable structure comprises the following structures: the combined structure of the steel wire bundle, the wrapping belt, the high-polyethylene sheath, the fireproof heat-preservation and heat-insulation layer, the waterproof coating coated on the outer surface of the fireproof heat-preservation and heat-insulation layer, and the hot-melt wrapping belt, the fiber cloth and the high-polyethylene sheath is adopted; namely, the inner layer is a steel wire bundle plus wrapping bands plus (high-polyethylene sheath), the middle layer is a fireproof heat-preservation heat-insulation layer plus (waterproof coating), and the outer layer is a hot-melt wrapping band plus (fiber cloth high-polyethylene sheath). The invention achieves the purposes of water resistance, weather resistance, flame retardance, fire resistance and heat insulation through the cable structure.
Description
Technical Field
The invention relates to the technical field of bridge stay cables, in particular to a fire-resistant stay cable and a manufacturing method thereof.
Background
In recent years, bridge fire accidents frequently occur, and economic loss and social influence caused by part of fire accidents are huge. To the cable-stay bridge that main atress structure is the cable, it is influenced very seriously by the conflagration, and the cable reduces the inefficacy in conflagration high temperature environment intensity, probably leads to the structural damage of whole cable-stay bridge, consequently, develops a high temperature resistant suspension cable and has important realistic meaning.
At present, high-polyethylene is mostly used for protecting the steel bundles of the stay cables in the market, and the polyethylene has good water-tight and weather-resistant effects, but is easy to ignite in a fire high-temperature environment, so that the influence degree and range of the stay cables on the fire are more serious. And the polyethylene protective layer is easily damaged by machinery in the construction process, thereby reducing the water-tight and weather-resistant effects of the polyethylene protective layer. Chinese patent 201920138763.0 discloses a flame-retardant bridge stay cable, which is made by adhering a fire-resistant cloth on the surface of the original high polyethylene protective layer by adhesive glue, thereby achieving the purpose of fire prevention. The method is complex in construction and is more suitable for high-temperature resistant upgrading and transformation of the existing stay cable. Chinese patent application 201811612472.7 discloses a flame retardant cable which develops a completely different protection system from the original high polyethylene protection, including: the outer fireproof rubber layer and the inner fireproof rubber layer are heat insulation layers formed by raw materials such as water-based resin, ammonium polyphosphate, vermiculite, expanded graphite, perlite and water, construction and installation after the manufacturing are not convenient due to the fact that the heat insulation layers are formed by the heat insulation layers, the heat insulation layers are easily damaged by machinery in the construction process, the heat insulation effect is affected, and damage to steel wire bundles can be caused.
Disclosure of Invention
In order to solve the problems, the invention provides a fire-resistant stay cable and a manufacturing method thereof, which are characterized in that functional layers such as fire prevention, heat preservation, heat insulation and the like are compounded into polyethylene in the production process of the stay cable on the basis of not changing the water-tight and weather-resistant performances of the existing stay cable polyethylene protection system, so that a novel fire-resistant stay cable is formed.
The invention provides the following technical scheme:
a manufacturing method of a fire-resistant stay cable structure comprises the following steps:
s1, steel wire bundle fastening and forming:
after the steel wire bundles with the designed specification and quantity are drawn, discharged and fastened according to requirements, a wrapping machine is used for tightly wrapping the steel wire bundles with a wrapping belt according to a certain angle and overlapping width;
s2, wrapping a fireproof heat-insulating layer:
winding the fireproof heat-insulating layer by using a wrapping machine;
s3, wrapping, hot melting and wrapping belt:
wrapping the hot-melting wrapping belt on the surface of the fire-resistant heat-preservation heat-insulation layer by using a wrapping machine;
and S4, performing anti-wind-rain-vibration surface treatment on the stayed-cable structure.
Preferably, a polyethylene sheath with designed thickness is formed on the surface of the formed steel wire bundle by hot melting and extrusion.
Preferably, the fire-resistant heat-insulation layer is a composite heat-insulation laminated layer formed by alternately laminating a plurality of base cloths and needled felts.
Preferably, the base cloth is formed by blending one or more than two of high silica cloth, basalt fiber cloth, glass fiber cloth, terylene, nylon, polyimide and aramid fiber; the needled felt is formed by blending one or more than two of basalt fiber felt, high silica felt, glass fiber felt, terylene, polyimide and aramid fiber.
Preferably, in step S2, a refractory metal clip is used to fix the refractory heat insulating layer.
Preferably, in step S3, the material is wrapped on the surface of the refractory heat-preservation and heat-insulation layer at an angle of 15 to 50 degrees and is fastened and formed.
Preferably, after the step S3 of wrapping the hot-melt wrapping tape, the outer layer fiber cloth polyethylene sheath is formed, and the specific steps are as follows: fully attaching fiber cloth with design requirements on the inner layer of an extrusion machine, injecting a hot-melt polyethylene material into a test die, starting the extrusion machine to extrude the fiber cloth onto the surface of the hot-melt polyethylene, and simultaneously extruding the polyethylene material onto the surface of a wrapping belt; preferably, the fiber cloth is high silica cloth, basalt fiber cloth, glass fiber cloth or carbon fiber cloth.
Preferably, the fire-resistant heat-insulating layer is externally coated with a waterproof coating.
The invention also provides the fire-resistant stayed cable structure prepared by the method.
Compared with the prior art, the invention has the following advantages:
(1) the invention takes fiber and polyethylene as main materials, and realizes the improvement of waterproof, flame retardant, heat insulation and weather resistance of the bridge cable by adopting a combined structure of 'steel wire bundle + wrapping belt + (polyethylene sheath) + fireproof heat-preservation and insulation layer (the waterproof coating is coated on the outer side surface) + hot-melt wrapping belt + (fiber cloth polyethylene sheath)', thereby prolonging the service life of the bridge cable and ensuring the use safety.
(2) The stay cable structure of the invention has simple production process, only needs the production steps of adding the fireproof heat-preservation and heat-insulation layer and the wrapping belt in the original stay cable production step, and is suitable for large-scale production in factories.
(3) The functions of all layers of the stay cable are clear, so that the polyethylene sheath can be isolated from a fire source on one hand, and the polyethylene sheath is prevented from being not ignited in a medium and small fire environment; on the other hand, the built-in flexible heat insulation layer can ensure that the steel wire bundle cannot lose efficacy due to high temperature in a large fire environment.
(4) The stay cable can be suitable for different fire risk scenes by canceling the heat insulation layer or adjusting the thickness and the position of the heat insulation layer, and has wide application range.
Drawings
FIG. 1 is a schematic structural view of a composite thermal insulation laminate of example 1 of the present invention;
FIG. 2 is a graph of the inside and outside temperature profiles of the fire-retardant property of example 1 of the present invention;
FIG. 3 is a schematic structural view of a composite thermal insulation laminate of example 2 of the present invention;
FIG. 4 is a graph of the inside and outside temperature profiles of the fire performance of example 2 of the present invention;
FIG. 5 is a graph of the internal and external temperature profiles of the fire protection performance of example 3 of the present invention.
In the figure: 1-base cloth and 2-needled felt.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
A manufacturing method of a fire-resistant stayed cable structure comprises the following steps: the combined structure of the steel wire bundle, the wrapping belt, the basalt fireproof heat-preservation heat-insulation layer (the waterproof coating is coated on the outer side surface) and the hot-melt wrapping belt comprises the following steps:
s1, fastening and forming the steel wire bundle. After the steel wire bundles with the designed specifications and the number are drawn, discharged and fastened according to requirements, the steel wire bundles are wound and wrapped by a wrapping machine according to a certain angle and overlapping width and are fastened and formed.
And S2, winding and wrapping the basalt fiber fireproof heat-preservation heat-insulation layer. And tightly winding the basalt fire-resistant heat-insulation layer on the surface of the inner-layer winding belt by using a winding machine, and fixing the fire-resistant heat-insulation layer by using a high-temperature-resistant metal hoop. The basalt fire-resistant heat-insulating layer is formed by alternately overlapping basalt fiber base cloth and needled felt, as shown in figure 1.
S3, directly winding the hot-melt winding belt on the surface of the fire-resistant heat-insulating layer at an angle of 30 degrees by using a winding machine, and fastening and forming; the outer surface is coated with a waterproof coating.
And S4, treating the wind, rain and vibration resisting surface of the stay cable. And after the hot melting extrusion of the outer sheath is finished, immediately performing the wind, rain and vibration resisting surface treatment on the stay cable, and finishing the manufacture of the stay cable. The measures adopted at present mainly comprise mechanical measures (a damper), structural measures (an auxiliary cable) and pneumatic measures (a spiral line wound on the surface of the cable, a pressed pit and the like). The principle of mechanical measures is to achieve the aim of controlling vibration by increasing the damping of the structure; the structural measures, such as the principle of arranging the auxiliary cable, are to achieve the purpose of inhibiting vibration by reducing the effective length of the cable and improving the natural frequency of the cable; the aerodynamic measures are to control the vibrations by hindering the formation of waterlines, changing the extent of the wind speed and effects that occur from the reynolds number effect.
Research shows that the steel strand has no obvious structural change and no great attenuation of mechanical performance indexes when heated to below 400 ℃; crystallization and phase transformation occur successively at a temperature of above 400 ℃, the strength and hardness are greatly attenuated, and the plasticity is obviously increased. In FIG. 2, the average temperature inside the test piece is less than 400 ℃, and the vehicle causes a fire for about 30-120 minutes. Therefore, the structure for the test basically meets the fireproof and heat-insulating requirements of the bridge cable; enough time is left for fire rescue, and the fire rescue requirements of the bridge are met.
Fig. 2 is a graph of the internal and external temperature of the fire-proof performance of the fire-proof stay cable structure. As can be seen from the graph showing that the flame temperature of the burn test continued for 30 min, the temperature of the flame increased to about 900 ℃ within 300s, while the temperature of the inner side of the test piece increased slowly and stabilized substantially below 8090 ℃ after 1200 s. The material meets the requirements of fire prevention and heat insulation.
Example 2
A manufacturing method of a fire-resistant stayed cable structure comprises the following steps: the steel wire bundle, the wrapping belt, the polyethylene sheath, the fireproof heat-insulating layer (the waterproof coating is coated on the outer side surface), the hot-melt wrapping belt and the preparation process are basically the same as those in the embodiment 1, and the difference is that: the base cloth of the fire-resistant heat-insulating layer is made of high silica cloth, and the needled felt is made of high silica needled felt, as shown in figure 3.
As shown in FIG. 4, this burning test continued for 30 min, the flame temperature increased to about 900 ℃ in 300s, while the temperature rise rate of the inside of the test piece was slow and stabilized to 150 ℃ or less after 1200 s. The material meets the requirements of fire prevention and heat insulation.
Example 3
A manufacturing method of a fire-resistant stayed cable structure comprises the following steps: the steel wire bundle + wrapping belt + polyethylene sheath + fire-resistant heat-insulating layer (the outer surface is coated with a waterproof coating layer) + hot-melt wrapping belt + fiber cloth polyethylene sheath, and the preparation process is basically the same as that of the embodiment 2, and the difference is that: fully pasting fiber cloth with design requirements on the inner layer of an extrusion machine, injecting a hot-melt polyethylene material into a test die, starting the extrusion machine to extrude the fiber cloth to the surface of the hot-melt polyethylene, and simultaneously extruding the polyethylene material to the surface of a wrapping belt, wherein the fiber cloth is basalt fiber cloth.
As shown in FIG. 5, this burning test continued for 30 min, the flame temperature increased to about 900 ℃ in 300s, while the temperature rise rate of the inside of the test piece was slow and stabilized substantially below 120 ℃ after 1200 s. The material meets the requirements of fire prevention and heat insulation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A manufacturing method of a fire-resistant stay cable structure is characterized by comprising the following steps:
s1, steel wire bundle fastening and forming:
after the steel wire bundles with the designed specification and quantity are drawn, discharged and fastened according to requirements, a wrapping machine is used for tightly wrapping the steel wire bundles with a wrapping belt according to a certain angle and overlapping width;
s2, wrapping a fireproof heat-insulating layer:
winding the fireproof heat-insulating layer by using a wrapping machine;
s3, wrapping, hot melting and wrapping belt:
wrapping the hot-melting wrapping belt on the surface of the fire-resistant heat-preservation heat-insulation layer by using a wrapping machine;
and S4, performing anti-wind-rain-vibration surface treatment on the stayed-cable structure.
2. The method of claim 1, wherein the polyethylene sheath is formed by hot-melting and extrusion to a designed thickness on the surface of the shaped steel wire bundle.
3. The manufacturing method of claim 1, wherein the fire-resistant heat-insulating layer is a composite heat-insulating laminated layer formed by alternately laminating a plurality of base fabrics and needled felts.
4. The manufacturing method of claim 1, wherein the base cloth is blended by one or more than two of high silica cloth, basalt fiber cloth, glass fiber cloth, terylene, nylon, polyimide and aramid fiber; the needled felt is formed by blending one or more than two of basalt fiber felt, high silica felt, glass fiber felt, terylene, polyimide and aramid fiber.
5. The method of claim 1, wherein the refractory heat insulating layer is fixed by a refractory metal band in step S2.
6. The manufacturing method according to claim 1, wherein in step S3, the heat-insulating layer is wrapped at an angle of 15-50 ° and fastened to form.
7. The manufacturing method of any one of claims 1 to 6, wherein the step S3 of forming the outer layer fiber cloth polyethylene sheath after wrapping the hot-melt wrapping tape comprises the following specific steps: fully attaching fiber cloth with design requirements on the inner layer of an extrusion machine, injecting a hot-melt polyethylene material into a test die, starting the extrusion machine to extrude the fiber cloth onto the surface of the hot-melt polyethylene, and simultaneously extruding the polyethylene material onto the surface of a wrapping belt; preferably, the fiber cloth is high silica cloth, basalt fiber cloth, glass fiber cloth or carbon fiber cloth.
8. The manufacturing method of claim 1, wherein the fire-resistant heat-insulating layer is coated with a waterproof coating.
9. Fire-resistant stayed cable structure prepared according to the method of manufacture of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010495508.9A CN111549666A (en) | 2020-06-03 | 2020-06-03 | Fire-resistant stay cable and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010495508.9A CN111549666A (en) | 2020-06-03 | 2020-06-03 | Fire-resistant stay cable and manufacturing method thereof |
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| CN111549666A true CN111549666A (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010495508.9A Pending CN111549666A (en) | 2020-06-03 | 2020-06-03 | Fire-resistant stay cable and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878076A (en) * | 2021-01-11 | 2021-06-01 | 北京中地交科新材料技术研究有限公司 | Construction method of bridge cable fiber sealing protection system |
| CN113774792A (en) * | 2021-09-28 | 2021-12-10 | 江苏中矿大正表面工程技术有限公司 | New material fireproof system for bridge steel cable |
| WO2022199053A1 (en) * | 2021-03-26 | 2022-09-29 | 江苏法尔胜缆索有限公司 | Fire-resistant structure of durable super-large-span double-tower suspension bridge cable system |
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| CN1067491A (en) * | 1992-06-29 | 1992-12-30 | 刘堪金 | Refractory heat-insulating hose |
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| CN209722739U (en) * | 2018-12-29 | 2019-12-03 | 上海浦江缆索股份有限公司 | Drag-line cable body with fire resistant layer |
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| CN212611973U (en) * | 2020-06-03 | 2021-02-26 | 江苏天龙玄武岩连续纤维股份有限公司 | Fire-resistant stay cable |
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2020
- 2020-06-03 CN CN202010495508.9A patent/CN111549666A/en active Pending
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| Title |
|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878076A (en) * | 2021-01-11 | 2021-06-01 | 北京中地交科新材料技术研究有限公司 | Construction method of bridge cable fiber sealing protection system |
| WO2022199053A1 (en) * | 2021-03-26 | 2022-09-29 | 江苏法尔胜缆索有限公司 | Fire-resistant structure of durable super-large-span double-tower suspension bridge cable system |
| CN113774792A (en) * | 2021-09-28 | 2021-12-10 | 江苏中矿大正表面工程技术有限公司 | New material fireproof system for bridge steel cable |
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