A pipe jacking machine and its relay room

Abstract

The invention discloses a pipe jacking machine and a relay room thereof. The relay room includes a front shell and a rear shell, and the front shell and the rear shell are both provided with radially telescopic abutment shoes. When the abutment shoe is stretched out, the abutment shoe is inserted into the segment, and the front shell and the rear shell are respectively fixedly connected with the segment, so that the front shell and the rear shell can push the segment and push the main body conveniently. Realize the push function; when the abutment shoe is retracted, the abutment shoe is separated from the segment, and the front shell and the rear shell are respectively out of contact with the segment, providing conditions for pulling out the pusher body from the segment and avoiding push The main body hinders the pulling out of the main engine composed of the inner shell and its accessories, ensuring that the main engine is returned without damage; the pulling out of the pushing main body provides the possibility of recovering the pushing main body, avoids waste of resources, and is conducive to reducing construction costs.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a pipe jacking machine and a relay room thereof. Background technique [0002] Pipe jacking construction is an underground pipeline construction method developed after shield construction. With the help of the jacking force generated by the external propulsion device or relay room of the pipe jacking machine, the friction between the segment and the surrounding stratum can be overcome. The segments are pushed into the excavated tunnel section by section, and are widely used in the construction of expressways, intercity pipe corridors and mountain tunnels. Due to the limitation of the construction site, the pipe jacking construction has the problem that the receiving well cannot be set up or the setting cost of the receiving well is too high, which makes the pipe jacking machine with the retractable function widely used. [0003] The pipe jacking machine with retracta...

AI Technical Summary

Problems solved by technology

The traditional relay room cooperates with the pipe joint through the socket structure, and the pipe diameter of the segment is set according to the excavated tunnel. In actual construction, the inner diameter of the relay room is usually inconsistent with the inner diameter of the segment. When it is larger or smaller than the pipe diameter of the segment, there is a radial step surface between the relay and the adjacent segment, and the radial step surface can easily hinder the smooth retraction of the inner shell, and in severe cases, it may prevent the inner shell from returning completely. retreat

In addition, because the outer diameter of the relay room is consistent with the outer diameter of the pipe joint, the existing relay room usually stays directly in the tunnel and cannot be retracted with the inner shell, resulting in waste of resources and affecting construction costs

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