Fireproof outer layer isolation system for bridge stay cable

Abstract

The invention discloses a fireproof outer layer isolation system for a bridge stay cable. The fireproof outer layer isolation system comprises a stay cable and an HDPE protective sleeve wrapping the outer side of the stay cable. The fireproof layer comprises two layers of basalt fiber cloth strips which are spirally wound on the outer side of the HDPE protective sleeve, and the winding directions of the two layers of basalt fiber cloth strips are opposite; an inner fastening and sealing layer comprises a plurality of sections of inner sealing sleeves which are arranged on the outer side of the fireproof layer in a sleeving manner; each inner sealing sleeve comprises two inner semicircular pipes, and a plurality of layers of basalt gridding cloth are bonded on the inner walls of the inner semicircular pipes and are bonded and fixed with the basalt fiber cloth strips; an outer protective sealing layer comprises a plurality of sections of outer sealing sleeves arranged on the outer side of the inner fastening and sealing layer in a sleeving manner; the outer sealing sleeve comprises two outer semicircular pipes, and a plurality of layers of basalt gridding cloth are adhered to the inner walls of the outer semicircular pipes; and the outer semicircular pipes are connected to the outer sides of the inner semicircular pipes. A prefabricated assembly mode can be achieved, the construction efficiency is improved, the sealing effect after assembly meets the requirement, and meanwhile, the anti-collision and anti-damage capacity of an isolation system can be improved.

Description

Technical field [0001] The present invention relates to a cable fire prevention and cable - stayed bridge technology, and more particularly, it relates to fire the outer isolation system for a stay cable bridge. Background technique [0002] my country from the 1990s began the construction of large-scale structure of the cable hanging bridges, construction of the run for nearly 30 years, the bridge, the incidence of accidents and disasters runtime also will increase, to society caused immeasurable loss. With the development of economic and social development, an increase in bridge traffic, vehicle transport inflammable and explosive materials on the bridge have continued to increase, resulting in a vehicle fire burning more and more events, fire prevention for bridge gradually attention. For cable system bridge, cable bridge as the main load-bearing components, once damaged in the fire, will cause traffic congestion, causing huge economic losses, at the same time pose a great thr...

AI Technical Summary

Problems solved by technology

For cable system bridges, the cables are the main load-bearing components of the bridge. Once damaged in a fire, the traffic will be blocked, causing huge economic losses, and at the same time pose a great threat to the safety of the bridge.

At present, some cable system bridges have encountered different degrees of fire during operation, causing certain losses

[0003] In the prior art, great attention has been paid to the setting of the fireproof layer of the outer layer of the cable, but the existing fireproof layer is all on-site construction, its construction efficiency is low, and the construction period is long. Prolonged repair time

Moreover, due to poor construction consistency caused by human construction, structural defects due to human construction cannot be avoided

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