New material fireproof system for bridge steel cable

Abstract

The invention discloses a novel material fireproof system for a bridge steel cable. A fireproof layer is wound and wrapped on the outer side of an inhaul cable; the sealing layer is bonded and fixed on the outer side of the fireproof layer; the fastening isolation layer is made of a fluororubber material and is tightly wrapped on the outer side of the sealing layer; the protection layer is of a hard sleeve-shaped structure and is fixedly arranged on the outer side of the fastening isolation layer in a sleeving mode. On the basis of the structure of the fireproof layer and the sealing layer, the fastening sealing layer made of fluororubber and the protective layer of a hard sleeve-shaped structure are additionally arranged, through use of new materials, on the basis of improving stability, the fireproof, protective and isolation effects are further improved, and the high-standard bridge fireproof requirement is met.

Description

technical field [0001] The invention relates to the technical field of bridge fire prevention, and more specifically relates to a new material fire prevention system for bridge steel cables. Background technique [0002] In order to improve the fireproof performance of cable-stayed bridge steel cables, in the prior art, the surface of the steel cables is first wrapped with a fireproof layer, and basalt fiber strips with a thickness of 3-5 mm are used to spirally wind the surface of the steel cables, and then the winding The outer layer of the formed fireproof layer is bonded to the sealing layer, and the sealing layer is directly wrapped on site by the basalt mesh cloth through the processing technology of four glues and three cloths. [0003] In order to ensure the stability of the sealing structure, it is also necessary to wrap the protective layer outside the fireproof layer. However, the general protective layer is only to protect against impact, and its fireproof perfor...

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Problems solved by technology

[0003] In order to ensure the stability of the sealing structure, it is also necessary to wrap the protective layer outside the fireproof layer. However, the general protective layer is only to protect against impact, and its fireproof performance is poor, or even has no fireproof effect. It plays the role of isolation, and the helical structure of basalt fiber strips has poor stability. Although the stability can be improved to a certain extent under the action of basalt mesh cloth, due to the long-term cold and heat effect, When the bonding surface of basalt fiber strips and basalt grid cloth corrodes, it will easily lead to a decrease in stability

In addition, the sealing layer plays a key role in guaranteeing the effect of the fireproof layer. If the sealing layer falls off or is damaged by external force, the fireproof layer will fail.

[0004] Conventional materials and structures have been difficult to meet the fire prevention requirements of existing cable-stayed bridges. A fire on a bridge will not only cause harm to the passage of people or vehicles, but also affect the repair of the bridge and the replacement of related components, causing significant social impact and Economic losses

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