Novel shield launching and receiving tunnel portal pressure-regulating self-sealing structure

Abstract

The invention belongs to the technical field of shield construction, and particularly relates to a novel shield launching and receiving tunnel portal pressure-regulating self-sealing structure. The problems that in the prior art, a sealing structure is not thorough in sealing, and water and slurry are prone to leaking when the pressure of the water and the slurry is large are solved. According tothe technical scheme, the novel shield launching and receiving tunnel portal pressure-regulating self-sealing structure comprises an embedded annular plate and a fixed annular plate, the section of the embedded annular plate is in an L shape, one side of the embedded annular plate is perpendicular to the axis of a shield tunneling machine, the other side of the embedded annular plate is parallel to a shell of the shield tunneling machine, and a steel edge wrapping type rubber cord fabric is arranged on the side, perpendicular to the axis of the shield tunneling machine, of the embedded annularplate; and the steel edge wrapping type rubber cord fabric is located between the embedded annular plate and the fixed annular plate and is fixed through a fastening bolt, the fixed annular plate isconnected with a folding turning plate, and a compression type self-sealing structure is arranged at the inner side of the embedded annular plate. According to the novel shield launching and receivingtunnel portal pressure-regulating self-sealing structure, a double-layer self-sealing structure and a middle resistance type compression spring are adopted for sealing, so that the problem that a tunnel portal rubber cord fabric is difficult to seal can be effectively solved, and the novel shield launching and receiving tunnel portal pressure-regulating self-sealing structure is suitable for sealing a shield launching and receiving tunnel portal.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and in particular relates to a novel shield tunnel starting and receiving portal pressure-regulating self-sealing structure. Background technique [0002] With the rapid development of modern society and the large-scale promotion of urbanization, the traffic pressure in central cities is increasing, and people's demand for urban subways is increasing. Shield tunnel construction is widely used because of its advantages of high degree of mechanization, fast construction speed, and little impact on ground buildings. In shield tunnel construction, the starting and receiving of shield tunnels is one of the most important steps. In the initial stage, there may be safety accidents such as water gushing, sand gushing, permeable subsidence, etc., especially in the geological conditions of rich water and soft soil. Major accidents such as flooding and burial continue to occur. In order to ensure ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the sealing structure in the prior art is not completely sealed and is prone to water and slurry leakage when the pressure of water and slurry is high, the present invention provides a new type of self-sealing structure for shield starting and receiving portal pressure regulation, and its purpose is to: Enhanced sealing effect prevents mud from gushing out and eliminates quality and safety hazards

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