Method for dismounting second-lined reinforced concrete in tunnel

Abstract

The invention discloses a method for dismounting second-lined reinforced concrete in tunnel, which comprises following steps: (1) reinforcing the to-be-dismounted second-lined reinforced concrete in tunnel; (2) cutting the second-lined reinforced concrete by using hydraulic wall saws; and (3) dismounting the second-lined reinforced concrete by using a breaking hammer. The second-lined reinforced concrete is dismounted by using the hydraulic wall saws cooperating with the breaking hammer. The hydraulic wall saws can be quickly mounted, and have simple operation, low maintenance cost and high cutting efficiency. The original second-lined reinforced concrete is cut into separated unit blocks, and the cut second-lined reinforced concrete is removed by the breaking hammer in a hopping segmented manner, so that the disturbance happened in the surrounding rocks and a supporting construction is effectively reduced, the risk of collapse is avoided, and the safety is quite high; and the construction joints formed by cutting are regular and smooth and has no need to be modified.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a method for removing reinforced concrete for the second lining of a tunnel. Background technique [0002] Tunnels located in weak surrounding rocks or areas of high ground stress may suffer from secondary lining cracking, block falling, and cracking due to the passage time of the tunnel, geological conditions of the surrounding rock, survey design, and construction management. In order to ensure the safe operation of the tunnel, it is often necessary to remove the original reinforced concrete secondary lining, and solve the tunnel secondary lining disease by reinforcing the primary support and the secondary lining structure or strengthening the secondary lining structure alone. [0003] The traditional demolition methods of reinforced concrete for secondary lining mainly include controlled blasting, static blasting and direct mechanical chisel removal. Blasting vibr...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a method for dismantling the reinforced concrete of the second lining of the tunnel, which effectively solves the disturbance and safety problems caused by blasting and mechanical direct chiseling of the reinforced concrete of the second li

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