CN111085414A - Protection method of bolt for bridge and anti-corrosion bolt assembly - Google Patents
Protection method of bolt for bridge and anti-corrosion bolt assembly Download PDFInfo
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- CN111085414A CN111085414A CN201911388828.8A CN201911388828A CN111085414A CN 111085414 A CN111085414 A CN 111085414A CN 201911388828 A CN201911388828 A CN 201911388828A CN 111085414 A CN111085414 A CN 111085414A
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- bolt
- protective cover
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2451/00—Type of carrier, type of coating (Multilayers)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2506/00—Halogenated polymers
- B05D2506/10—Fluorinated polymers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a method for protecting a bolt for a bridge, which comprises the following steps of firstly, fixedly connecting a bolt connecting piece to a base material to be fixed; then sequentially brushing primer, intermediate paint and finish paint on the exposed outer surface of the bolt connecting piece; and finally, filling the sealant into the protective cover, and buckling the protective cover on the bolt connecting piece. According to the method, the primer, the intermediate paint and the finish paint are sequentially coated on the exposed outer surface of the bolt connecting piece, and then the protective cover is buckled on the bolt connecting piece, so that the effects of simplicity in construction, good durability and good corrosion resistance are achieved. The invention also discloses an anti-corrosion bolt assembly which comprises the bolt connecting piece, a painting layer, a sealing glue layer and a protective cover, wherein the primer, the intermediate paint and the finish paint are sequentially painted on the exposed outer surface of the bolt connecting piece, the protective cover filled with the sealant is buckled on the bolt connecting piece, and the painting, the sealing glue and the protective cover are adopted to carry out triple protection on the bolt, so that the effects of simple construction, good durability and good anti-corrosion performance are realized.
Description
Technical Field
The invention relates to the field of on-site protection of bridge sites, in particular to a method for protecting a bolt for a bridge and an anti-corrosion bolt assembly.
Background
The bolt is a commonly used connecting piece, especially the bridge structure has adopted a large amount of bolts, such as high strength bolt, guardrail rag bolt, bridge beam support bolt, etc. for anti-skidding friction surface, the bridge is in the harsh atmospheric corrosion condition such as rivers, lakes and seas, etc., especially the bolt position (including bolt, nut, packing ring, etc.) because there are a large amount of gaps, it is easy to retain corrosive medium such as water, salinity, pollutant, etc., water and air including corrosive medium enter the gap and corrode the bolt, have corroded the gap, its corrosion rate is obviously higher than other components. The serious corrosion of the bolt can lead to the strength reduction of the connecting member, can influence the service life of the bridge structure and has great potential safety hazard. The bolts are difficult to replace in the designed service life of the bridge and the replacement cost is high, so that the bolts of the bridge need to be protected.
In the manufacturing process of the bolt, the surfaces of the bolt and the nut are subjected to special anticorrosion treatment in a factory, and a simple protection structure is provided, such as a phosphating film prefabricated bolt in a factory; bolts with hot dip galvanizing in factories are adopted; bolts using a factory dacromet process; bolts using a factory zincing process, and the like. However, due to tolerance fit of bolts, the thickness of the anticorrosive coating of the protective structure subjected to the factory anticorrosive process is generally not more than 10 μm, and the thin anticorrosive prefabricated coating does not have good durability in a high-corrosion environment.
The existing bridge bolt protection technology is as follows:
(1) coating technology of primer, intermediate paint and finish paint
The existing bridge site general protection technology of bridge bolts adopts a coating method, which comprises the following steps: and (3) mechanically or manually polishing the exposed bolt joint part, wherein the treatment grade is St3 grade, brushing (1-2 times) epoxy primer, and coating intermediate paint and finish paint (colored paint) according to a paint matching system of the adjacent part of the bolt.
At present, bridges are protected by the protection method at home and abroad, according to the current situation of domestic investigation, land bridges and northern bridges in dry climate have certain protection effect, but for bridges in high humidity, high salinity and low latitude areas, bolts have serious corrosion problem after being coated for 3 years.
(2) Protection technology of primer, antirust grease and PVC protective cover
In the new construction of the Hangzhou bay bridge, a primer, antirust butter and PVC protective cover protection technology is adopted, and the method comprises the following steps: and (3) mechanically or manually polishing the exposed bolt joint part, wherein the treatment grade is St3 grade, brushing epoxy primer, smearing rust-proof butter on the exposed bolt part, and covering a PVC protective cover for protection.
After 5 years of working condition examination, the protective effect of the technology is poor due to the fact that the PVC cap is aged and becomes brittle and the antirust butter runs off under the sun exposure caused by external factors such as corrosive environment, severe weather and the like.
(3) Primer, intermediate paint, polysulfide sealant and fluorocarbon finish protection technology
The method comprises the following steps that maintenance protection is carried out on guardrail foundation bolts again in 2013 of the Zhejiang golden pool bridge and 2015 of the Hangzhou Bay bridge, and the method comprises the following steps: and (3) mechanically or manually polishing the exposed bolted part, wherein the treatment grade is St3 grade, brushing (1-2) epoxy zinc-rich primer of 80 mu m, brushing 2 epoxy micaceous iron intermediate paint of 120 mu m, smearing polysulfide sealant of 500 mu m, and finally coating 2 fluorocarbon finish paint of 80 mu m. The method has good operation effect at present.
But the defects that the construction of the polysulfide sealant is difficult, the construction period is long, the whole protection system is completely constructed, and the appearance effect is general.
Therefore, a bolt protection method and an anticorrosive bolt assembly which are simple in construction process, improve durability and ensure safety and reliability of a bridge connection structure are urgently needed in the market.
Disclosure of Invention
The invention aims to provide a protection method of a bolt for a bridge and an anti-corrosion bolt assembly, which are used for solving the problems in the prior art and can realize simple construction, good durability and good anti-corrosion performance.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a protection method of a bolt for a bridge, which comprises the following steps:
firstly, fixedly connecting a bolt connecting piece to a base material to be fixed, and polishing the exposed outer surface of the bolt connecting piece and the surface of the base material around the bolt connecting piece;
secondly, sequentially brushing primer, intermediate paint and finish paint on the exposed outer surface of the bolt connecting piece;
filling sealant in the protective cover, buckling the protective cover filled with the sealant on the bolt connecting piece, and enabling the sealant to be filled between the protective cover and the exposed outer surface of the bolt connecting piece.
Preferably, the sanding treatment is rated at St2 or St3 as specified in GB/T8923.
The invention also provides an anti-corrosion bolt assembly which comprises a bolt connecting piece, a painted layer, a sealing glue layer and a protective cover, wherein the bolt connecting piece comprises a bolt, a nut and a gasket, the bolt is used for being inserted into the surface of a base material to be fixed, the bolt sequentially penetrates through the nut, the gasket and the base material and is in threaded connection with the nut, the painted layer comprises a primer layer, a middle paint layer and a finish paint layer which are sequentially painted on the exposed outer surface of the bolt connecting piece, the protective cover is used for buckling the outer side of the exposed outer surface of the bolt connecting piece and can seal the bolt connecting piece in the protective cover, the sealing glue layer is filled between the exposed outer surface of the bolt connecting piece and the protective cover, and the diameter of the protective cover is larger than that of the gasket.
Preferably, the number of the primer layers is 1-2, the film thickness of the primer layers is 60-80 μm, and the primer layers are epoxy primers or epoxy zinc-rich primers.
Preferably, the number of the intermediate paint layers is 1-2, the film thickness of the intermediate paint layers is 100-120 μm, and the intermediate paint layers are epoxy intermediate paints or epoxy micaceous iron intermediate paints.
Preferably, the surface paint layer is 1-2, the film thickness of the surface paint layer is 60-80 μm, and the surface paint layer is fluorocarbon finish paint.
Preferably, the sealant layer is a two-component crosslinking sealant or a polysulfide sealant.
Preferably, the material of the protective cover is ASA plastic or PVDF plastic.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a method for protecting a bolt for a bridge, which comprises the following steps of firstly, fixedly connecting a bolt connecting piece to a base material to be fixed; then, sequentially brushing primer, intermediate paint and finish paint on the exposed outer surface of the bolt connecting piece; and finally, filling the sealant in the protective cover, buckling the protective cover filled with the sealant on the bolt connecting piece, and filling the sealant between the protective cover and the exposed outer surface of the bolt connecting piece. According to the method, the primer, the intermediate paint and the finish paint are sequentially coated on the exposed outer surface of the bolt connecting piece, then the protective cover filled with the sealant is buckled on the bolt connecting piece, and the painting, the sealant and the protective cover are adopted to carry out triple protection on the bolt, so that the effects of simplicity in construction, good durability and good corrosion resistance are achieved. The invention also discloses an anti-corrosion bolt assembly which comprises the bolt connecting piece, a painting layer, a sealing glue layer and a protective cover, wherein the primer, the intermediate paint and the finish paint are sequentially painted on the exposed outer surface of the bolt connecting piece, the protective cover filled with the sealant is buckled on the bolt connecting piece, and the painting, the sealing glue and the protective cover are adopted to carry out triple protection on the bolt, so that the effects of simple construction, good durability and good anti-corrosion performance are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a corrosion resistant bolt assembly according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
in the figure: 1-base material, 2-gasket, 3-nut, 4-bolt, 5-priming paint layer, 6-intermediate paint layer, 7-finish paint layer, 8-sealant layer and 9-protective cover.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a protection method of a bolt for a bridge and an anti-corrosion bolt assembly, and aims to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
The embodiment provides a method for protecting a bolt for a bridge, which comprises the following steps as shown in fig. 1:
firstly, fixedly connecting a bolt connecting piece to a base material 1 to be fixed, and polishing the exposed outer surface of the bolt connecting piece and the surface of the base material around the bolt connecting piece;
secondly, sequentially brushing primer, intermediate paint and finish paint on the exposed outer surface of the bolt connecting piece;
and thirdly, filling the sealant in the protective cover 9, buckling the protective cover 9 filled with the sealant on the bolt connecting piece, and filling the sealant between the protective cover 9 and the exposed outer surface of the bolt connecting piece.
The invention provides a method for protecting a bolt for a bridge, which comprises the following steps of firstly, fixedly connecting a bolt connecting piece to a base material to be fixed, and polishing the exposed outer surface of the bolt connecting piece and the surface of the base material around the bolt connecting piece by adopting a manual or power tool; painting on the exposed outer surface of the bolt connecting piece, painting a primer firstly, forming a primer layer 5 after the primer is dried completely, painting an intermediate paint, forming an intermediate paint layer 6 after the intermediate paint is dried completely, painting a finish paint, forming a finish paint layer 7 after the finish paint is dried completely, filling the sealant in the protective cover 9, buckling the protective cover 9 filled with the sealant on the bolt connecting piece, filling the sealant between the protective cover 9 and the exposed outer surface of the bolt connecting piece to form a sealing glue layer 8, and wiping off the redundant extruded sealant after buckling. The bolt connecting piece is protected in a triple mode through paint coating, sealing glue and a protective cover 9, and the effects of simplicity in construction, good durability and good corrosion resistance are achieved.
In the present embodiment, in order to clean up impurities at the bolt joint and burrs on the surface of the base material 1 and improve the durability of the bolt, the grade of the grinding treatment is St2 grade or St3 grade specified in GB/T8923, and is preferably St3 grade.
Example two
The embodiment provides an anticorrosive bolt assembly, including bolted connection spare, the coating layer, sealing glue layer and protective cover 9, bolted connection spare includes bolt 4, nut 3 and gasket 2, bolt 4 is used for inserting 1 surface of the substrate that needs to be fixed, bolt 4 passes nut 3 in proper order, gasket 2 and substrate 1, and with 3 threaded connection of nut, the coating layer includes the priming paint layer of applying paint with a brush on bolted connection spare's the exposed surface in proper order, middle lacquer layer and finish paint layer, protective cover 9 is used for detaining the outside at bolted connection spare's exposed surface, and can seal up bolted connection spare inside protective cover 9, 8 packing of sealing glue layer are between bolted connection spare's exposed surface and protective cover 9, the diameter of protective cover 9 is greater than the diameter of gasket 2.
In the specific application process, firstly, the bolt connecting piece is installed on the surface of a substrate 1 needing to be fixed, then the exposed outer surface of the bolt connecting piece is sequentially coated with a primer layer 5, an intermediate paint layer 6 and a finish paint layer 7, as shown in fig. 2, then a protective cover 9 filled with sealant is buckled on the bolt connecting piece, so that the sealant is filled between the exposed outer surface of the bolt connecting piece and the protective cover to form a sealing glue layer 8, and the bolt is protected in a triple mode through the paint, the sealing glue layer 8 and the protective cover 9, so that the effects of simplicity in construction, good durability and good corrosion resistance are achieved.
In the embodiment, in order to improve the anti-rust performance of the bolt joint, the number of the primer layers 5 is 1-2, the film thickness of the primer layers 5 is 60-80 μm, and the primer layers 5 are epoxy primers or epoxy zinc-rich primers, preferably epoxy zinc-rich primers.
In the embodiment, in order to improve the corrosion resistance of the bolt joint and the adhesion of the intermediate paint, the number of the intermediate paint layers 6 is 1-2, the thickness of the intermediate paint layers 6 is 100-120 μm, and the intermediate paint layer 6 is an epoxy intermediate paint or an epoxy micaceous iron intermediate paint, preferably an epoxy micaceous iron intermediate paint.
In the embodiment, in order to improve the heat insulation and temperature reduction performance of the bolt joint, the finish paint layer 7 is 1-2, the film thickness of the finish paint layer 7 is 60-80 μm, and the finish paint layer 7 is fluorocarbon finish paint.
In the present embodiment, in order to improve the sealing performance of the bolt joint, the sealant layer 8 is a two-component cross-linking type sealant or a polysulfide sealant, preferably a polysulfide sealant.
In this embodiment, in order to improve the corrosion resistance of the bolted joint, the protective cover 9 is made of ASA plastic or PVDF plastic, and the ASA plastic protective cover is used for the bolted joint without direct sunlight, so that the weather resistance and wear resistance of the bolted joint are improved, and the PVDF plastic protective cover is used for the bolted joint with direct sunlight, so that not only are the wear resistance and impact resistance of the bolted joint improved, but also the fading resistance and ultraviolet resistance in an extremely severe and harsh environment are improved.
It should be noted that the protection method for the bolt for the bridge and the anti-corrosion bolt assembly are not limited to the field of bridges, and can be applied to other fields applying bolt connection.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (8)
1. A protection method of a bolt for a bridge is characterized by comprising the following steps: the method comprises the following steps:
firstly, fixedly connecting a bolt connecting piece to a base material to be fixed, and polishing the exposed outer surface of the bolt connecting piece and the surface of the base material around the bolt connecting piece;
secondly, sequentially brushing primer, intermediate paint and finish paint on the exposed outer surface of the bolt connecting piece;
filling sealant in the protective cover, buckling the protective cover filled with the sealant on the bolt connecting piece, and enabling the sealant to be filled between the protective cover and the exposed outer surface of the bolt connecting piece.
2. The method for protecting a bolt for a bridge according to claim 1, wherein: the grade of the sanding treatment is St2 grade or St3 grade specified in GB/T8923.
3. An anticorrosive bolt subassembly which characterized in that: including bolted connection spare, painted layer, sealing glue layer and protective cover, bolted connection spare includes bolt, nut and gasket, the bolt is used for inserting needs fixed substrate surface, the bolt passes in proper order the nut the gasket with the substrate, and with nut threaded connection, painted layer includes priming paint layer, intermediate coat layer and finish coat layer of applying paint with a brush on bolted connection spare's the exposed surface in proper order, the protective cover detains bolted connection spare's the outside of exposed surface, and can with bolted connection spare is sealed inside the protective cover, sealing glue layer is full of bolted connection spare's exposed surface with between the protective cover, the diameter of protective cover is greater than the diameter of gasket.
4. A corrosion resistant bolt assembly as defined in claim 3 wherein: the number of the primer layers is 1-2, the film thickness of the primer layers is 60-80 mu m, and the primer layers are epoxy primers or epoxy zinc-rich primers.
5. A corrosion resistant bolt assembly as defined in claim 3 wherein: the number of the intermediate paint layers is 1-2, the film thickness of the intermediate paint layers is 100-120 mu m, and the intermediate paint layers are epoxy intermediate paints or epoxy micaceous iron intermediate paints.
6. A corrosion resistant bolt assembly as defined in claim 3 wherein: the surface paint layer is 1-2 times, the film thickness of the surface paint layer is 60-80 mu m, and the surface paint layer is fluorocarbon finish paint.
7. A corrosion resistant bolt assembly as defined in claim 3 wherein: the sealing adhesive layer is a two-component crosslinking type sealing adhesive or polysulfide sealing adhesive.
8. A corrosion resistant bolt assembly as defined in claim 3 wherein: the protective cover is made of ASA plastic or PVDF plastic.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388828.8A CN111085414A (en) | 2019-12-30 | 2019-12-30 | Protection method of bolt for bridge and anti-corrosion bolt assembly |
| CN202011216853.0A CN112122084A (en) | 2019-12-30 | 2020-11-04 | Protection method of bolt for bridge and anti-corrosion bolt assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388828.8A CN111085414A (en) | 2019-12-30 | 2019-12-30 | Protection method of bolt for bridge and anti-corrosion bolt assembly |
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| Publication Number | Publication Date |
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| CN111085414A true CN111085414A (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911388828.8A Pending CN111085414A (en) | 2019-12-30 | 2019-12-30 | Protection method of bolt for bridge and anti-corrosion bolt assembly |
| CN202011216853.0A Pending CN112122084A (en) | 2019-12-30 | 2020-11-04 | Protection method of bolt for bridge and anti-corrosion bolt assembly |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202011216853.0A Pending CN112122084A (en) | 2019-12-30 | 2020-11-04 | Protection method of bolt for bridge and anti-corrosion bolt assembly |
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| CN (2) | CN111085414A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893874A (en) * | 2020-07-31 | 2020-11-06 | 广西交科集团有限公司 | Anticorrosion method for lower structure connecting part of pile-column integrated prefabricated bridge |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2672356Y (en) * | 2003-12-25 | 2005-01-19 | 吴怀之 | Fastened protective cover |
| CN104294761A (en) * | 2014-04-09 | 2015-01-21 | 郑州中原应用技术研究开发有限公司 | Protection method of main cable anchoring system of suspension bridge, protection sealant of main cable anchoring system of suspension bridge and preparation method of protection sealant |
| CN105521933A (en) * | 2016-01-20 | 2016-04-27 | 惠宏工程技术（北京）有限公司 | Processing method for anti-corrosive fluorocarbon coating of anchor bolt |
| CN205488774U (en) * | 2016-04-14 | 2016-08-17 | 杭州科宏仪器仪表有限公司 | Solder joint prevent condensation structure |
| CN208874255U (en) * | 2018-08-16 | 2019-05-17 | 深圳供电局有限公司 | High-voltage cable intermediate head protective shell with double-layer shell |
| CN110408251A (en) * | 2019-09-06 | 2019-11-05 | 中国铁路设计集团有限公司 | A kind of railway steel bridge alkene-zinc-base fluorine carbon super-durable anticorrosion coat system |
| CN214390965U (en) * | 2019-12-30 | 2021-10-15 | 中航百慕新材料技术工程股份有限公司 | Anti-corrosion bolt assembly for bridge |
-
2019
- 2019-12-30 CN CN201911388828.8A patent/CN111085414A/en active Pending
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2020
- 2020-11-04 CN CN202011216853.0A patent/CN112122084A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893874A (en) * | 2020-07-31 | 2020-11-06 | 广西交科集团有限公司 | Anticorrosion method for lower structure connecting part of pile-column integrated prefabricated bridge |
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| CN112122084A (en) | 2020-12-25 |
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