Tunnel lining construction method

Abstract

The invention relates to a tunnel lining construction method which comprises the following steps that after primary support construction is completed, a waterproof plate fixed with a sleeve valve pipe in advance is laid on the surface of a primary support, and one end of the sleeve valve pipe extends into a groove reserved during primary support construction; a lining formwork is erected, and a secondary lining is poured; after secondary lining construction is completed, grouting is conducted on the secondary lining and the primary support through the sleeve valve pipe till the grouting amount is larger than a set value and the sleeve valve pipe has the grout overflowing phenomenon, construction is convenient by means of the method, damage to the waterproof plate is avoided, and the anti-seepage and water plugging capacity of the lining is guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel lining construction method. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] As the urban mainstream rail transit, the subway project continues to expand, which puts forward new requirements for the safety of subway construction. In the process of tunnel construction, affected by factors such as construction technology, operation level and construction management level, coupled with differences in geological conditions along the subway crossing, some tunnel supports have holes in the back, a large amount of water seepage, etc., and some tunnels even have The thickness of the second lining is seriously insufficient and other problems. [0004] The grouting method has always been an effective method for filling cavities and preventin...

AI Technical Summary

Problems solved by technology

The inventor found that although this method has played a certain role in filling the cavity behind the second lining, after the grouting pipe is buried, the internal condensation effect of the concrete cannot be fully guaranteed, and there are few external protective measures for the grouting pipe. Once a small amount of incompletely condensed concrete flows into or seals the grouting pipe, it will cause blockage, the survival rate of the grouting pipe is low, the grouting effect is poor, and it is difficult to meet the engineering requirements

The inventor also found that during the process of drilling and subsequent installation of grouting pipes, the drilling equipment is likely to cause damage to the waterproof board and affect the waterproof performance of the tunnel. In addition, the drilling process is required, which increases the labor intensity and construction cost. period, and caused some pollution to the construction environment

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