A shield tail brush replacement telescopic steel ring, sealing structure and replacement method for a shield machine

Abstract

The invention provides a shield machine shield tail brush replacing telescopic steel ring, a sealing structure and a replacing method. The sealing structure comprises a machine body, the telescopic steel ring, a jack and pipe pieces arranged in the tail of the machine body. Sealing brushes are further arranged between the pipe pieces and the inner wall of the tail, the jack is arranged in the tailand connected with the pipe pieces in an extension mode, and the telescopic steel ring is arranged between the jack and the pipe pieces. One end of the telescopic steel ring is fixedly connected withthe jack, and the other end of the telescopic steel ring extends towards the pipe pieces. By adopting the scheme, the sealing structure and the inner side of the shield tail can make close contact toensure tightness of the sealing structure, the structure is simple, and practicability is high; and by adopting the shield tail brush replacing method, the slurry leaking condition occurring during shield tail brush replacing can be timely treated, further expansion of the slurry leaking condition is prevented, and the replacing time is reduced.

Description

technical field [0001] The invention belongs to the technical field of maintenance of shield tunneling equipment, and in particular relates to a shield tail brush replacement telescopic steel ring, a sealing structure and a replacement method of a shield tunneling machine. Background technique [0002] In the existing shield machine, when the segment is moved forward or the shield tail brush is replaced, the external water pressure may cause water leakage and sand leakage at the shield tail, which makes it impossible to replace the shield tail brush; and because the replacement time is relatively long, during the replacement process If there is water and sand leakage during the forward movement of the segment, the segment should be restored immediately, and the shield tail should be supplemented by grouting before moving forward to replace the shield tail brush. However, for the shield tail brush During the replacement period, it will not be easy to deal with the leakage of ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a shield machine sealing structure aiming at solving the difficult problem of sealing the tail of the existing shield machine in view of the deficiencies in the above-mentioned technologies

Images