Repairing and rebuilding method for central isolation strip of bridge

Abstract

The invention discloses a repairing and rebuilding method for a central isolation strip of a bridge. The repairing and rebuilding method for the central isolation strip of the bridge comprises the following steps that face bricks, anti-glare panels, crash bearers, and original filling concrete of the original central isolation strip of the bridge are removed to the top surfaces of main beams; crash bearers are mounted on both sides, and drain pipes are mounted inside the crash bearers; first planks are arranged on the upper portions of reserved cracks of two bridge bodies, a first layer of lightweight concrete is poured, and then bidirectional transversal slopes are formed, and the foot positions of the slopes are aligned with the lower edges of drain holes formed in the drain pipes of the crash bearers; a first layer of SBS waterproof rolls is laid on the first layer of the lightweight concrete; second planks are arranged on the first layer of SBS waterproof rolls; then a second layer of the lightweight concrete is poured; the second layer of lightweight concrete is wrapped with a second layer of SBS waterproof rolls; blind drains are formed in the both sides of the second layer of lightweight concrete, and the blind drains are formed by wrapping large-particle-size gravel with geotechnical cloth; and undercover mortar and pathway bricks are laid. According to the repairing and rebuilding method, the central isolation strip rebuilt through the method is free of water accumulation and water seepage, and the durability of the bridge is improved.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a method for repairing and reconstructing the central isolation zone of a bridge. Background technique [0002] In the existing structure of the central isolation belt of the bridge, the reserved joints of the two bridge girders are embedded with benzene boards, the waterproof layer is neoprene latex asphalt, filled with foam concrete, and finally paved with pavement bricks. The benzene board itself is built into the gap only by its own compression. With the deformation and displacement of the two bridges up and down, and the aging of the material of the benzene board itself, the gap cannot be effectively filled. The foam concrete itself has a large porosity and a high water permeability, and there is no reserved joint between the two bridges, which will lead to cracking under the action of live load, which will lead to water seepage in the reserved joint of the current beam body...

AI Technical Summary

Problems solved by technology

The benzene board itself is built into the gap only by its own compression. With the deformation and displacement of the two bridges up and down, and the aging of the benzene board itself, the gap cannot be effectively filled.

The foam concrete itself has a large porosity and a high water permeability, and there is no reserved joint in the middle of the two bridges, which will lead to cracking under the action of live load, which will lead to water seepage in the reserved joint of the current beam body

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