A kind of arch reinforcement method suitable for small tunnel clearance

Abstract

The invention relates to an arch reinforcement method suitable for the clearance of small tunnels, which comprises the following steps: 1) laying waterproof boards, and laying circular drainage pipes, vertical water collection pipes and waterproof boards for sections with water leakage ; 2) On-site pouring of the arch foot side wall baffles on both sides of the tunnel arch foot; 3) Installing prefabricated steel plate concrete curved plates on the arch foot side wall baffles, after being locked by support bolts, assembled and erected and sealed; 4) Pour mortar and anchor at the arch foot of the tunnel, and grout behind the lining of the prefabricated steel plate concrete curved slab; 5) Lay the whole ring of prefabricated resin waterproof board to complete the arch reinforcement. Compared with the prior art, the present invention does not need to destroy the road surface, has the advantages of fast assembly speed, simple construction process, short construction time, can be resumed to traffic after construction is completed, and greatly reduces the impact of reinforcement construction on tunnel operation.

Description

technical field [0001] The invention relates to the field of tunnel arch reinforcement, in particular to an arch reinforcement method suitable for the clearance of small tunnels. Background technique [0002] The existing reinforcement technology schemes are aimed at operating tunnels with cracks, deformations, insufficient thickness and other defects or defects, and the clearance is small, adopting the method of "reducing the road surface elevation, increasing the clearance section, and applying superimposed or composite arches". Technical means, the basic steps are as follows: [0003] (1) According to the degree of tunnel disease or defect, design the arch casing that meets the structural bearing capacity of the tunnel; [0004] (2) According to the designed arch size, reduce the road surface elevation (under-excavation tunnel pavement and inverted arch); [0005] (3) Re-construct the inverted arch, chiseling the original lining surface, implanting steel bars, erecting ...

AI Technical Summary

Problems solved by technology

[0007] The main disadvantage of the existing construction method is that the construction process is complicated, the construction period is long, and the tunnel needs to be closed to prohibit vehicles from passing. It takes a long time to maintain the concrete arch, resulting in a long construction period and long-term impact on traffic

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