Pushing telescopic self-locking device and method for reducing formation loss caused by shield tail clearance

Abstract

The invention discloses a push shot telescopic self-locking device and a push shot telescopic self-locking method for reducing stratum loss caused by a gap of a shield tail. The push shot telescopic self-locking device comprises a concealed box body; an automatic isolation device is arranged at one side of the concealed box body; a push shot device is arranged at the other side of the concealed box body; the concealed box body is provided with an opening for enabling a telescopic self-locking device to enter; the push shot device can reciprocate in the concealed box body, push the telescopic self-locking device to move in the concealed box body and push the telescopic self-locking device out of the concealed box body so as to complete the one-time push action of the push shot device. By synchronously pushing and shooting a telescopic self-locking reinforcement frame in the propelling process of a shield tunneling machine, the push shot telescopic self-locking device takes the effects of filling the gap of the shield tail and temporarily supporting a duct piece and the stratum to avoid generating large stratum deformation, so that stratum loss caused by the gap of the shield tail is fundamentally reduced, synchronous supporting is really implemented when the gap of the shield tail is generated and surface deformation can be controlled better. Moreover, the push shot telescopic self-locking device disclosed by the invention has a simple structure, has high reliability, is convenient to operate and is economic and effective.

Description

technical field [0001] The invention relates to a thrusting telescopic self-locking device for reducing formation loss caused by shield tail clearance. Background technique [0002] Shield method construction is a widely used construction technology method in the construction of urban rail transit underground sections. However, due to the requirements of segment installation and construction technology, there is a gap of about 14cm between the segment and the shield shell, that is, the shield tail gap. The gap between the tail of the shield causes a large formation loss, which leads to increased formation deformation and threatens the safety of surrounding pipelines and buildings. There are currently two main treatment measures: one is synchronous grouting, and the other is pre-reinforcement of the formation. However, the synchronous grouting slurry Diffusion and solidification take time, and the filling rate is generally not ideal, which cannot restrain the formation deform...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a push-and-telescopic self-locking device that reduces formation loss caused by shield tail gaps, which can solve the problem of large formation deformation due to formation loss caused by shield tail gap question

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