Large-section rectangular pipe-jacking tunnel leaning device

By using a rigid rear-rear structure in the pipe hoisting tunnel project, the problems of insufficient pinch force and structural instability are solved, and efficient and economical pinch force transmission and stability of the construction process are achieved.

CN119712956APending Publication Date: 2025-03-28SHANGHAI MUNICIPAL ENG DESIGN INST (GRP) CO LTD
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Patent Information

Application Number
CN202411953163.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing pipe hoist tunnel projects have insufficient pinch force under long distances and/or large section rectangular pipe hoisting, high risk of instability in the steel rear system, low reliability and poor economicality in soil reinforcement, and setting up relay rooms will lead to complicated processes, low efficiency and increased cost.

Method used

A large-section rectangular top pipe tunnel rear-rest device is adopted to uniformly transmit the large top force to the tunnel structure and continuous wall through the rigid back-rest structure in the working well. The top force reaction force is provided by the lateral friction resistance and passive soil pressure between the tunnel structure and the continuous wall and the rock and soil body.

Benefits of technology

The rear-reach force is significantly improved, meeting the demand for large-section rectangular pipe tunnels for large-section, ensuring uniform and stable transmission of top force, reducing the risk of structural instability, and improving construction efficiency and economy.

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Abstract

The invention relates to the field of tunnel engineering, in particular to a large-section rectangular pipe jacking tunnel leaning device. The backing device is composed of a rigid backing structure in a working well, a tunnel structure and a continuous wall body, wherein the rigid backing structure, the tunnel structure and the continuous wall body are arranged behind a rectangular jacking pipe in advance, and large jacking force can be provided for a large-section rectangular jacking pipe tunnel. The rigid backrest structure in the working well can adopt a reinforced concrete structure form with higher rigidity; the tunnel structure can adopt an open cut section structure and an enclosure wall body form thereof; the continuous wall body is arranged on the lower portion of a bottom plate of the tunnel structure and can adopt an underground continuous wall form. Compared with a traditional leaning scheme for reinforcing a soil body behind a working well, the large-section rectangular pipe jacking tunnel leaning device can remarkably improve leaning jacking force, has the advantages of being safe, reliable, economical and applicable, is particularly suitable for long-distance and / or large-section rectangular pipe jacking tunnel engineering with the large requirement for jacking force, and has a wide application prospect. And the method has high engineering application value.
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