A shield tunneling through a mine method tunnel section auxiliary device

By using steel arches and pre-settlement devices in shield tunneling, the load on the shield body is distributed, and the tunnel structure is monitored and reinforced. This solves the problem of tunnel wall instability in mining tunnel sections and enables the shield body to pass safely and be permanently reinforced.

CN122359079APending Publication Date: 2026-07-10CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY 18TH BUREAU GRP CO LTD
Filing Date
2026-04-22
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In shield tunneling, the tunnel wall structure of the mining method tunnel section is not stable enough, which leads to instability and damage of the shield body when it passes through. Existing technology lacks effective auxiliary devices to improve safety.

Method used

The system employs steel arch frames and pre-settlement devices, including reinforcing pipes, plugs, and displacement sensors. Through support devices and channel steel guidance, the system disperses the shield load, monitors and reinforces the tunnel structure, prevents instability, and forms permanent reinforcement.

Benefits of technology

It improves the safety and stability of the shield tunneling through the mining tunnel section, avoids tunnel structure instability, ensures the shield body passes smoothly and leaves permanent reinforcement.

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Abstract

This invention discloses an auxiliary device for shield tunneling through mining tunnel sections, comprising several steel arch frames fixed within the tunnel section by anchor bolts. Each steel arch frame is equipped with a support device, and a channel steel is installed on the upper side of the support device. Multiple steel arch frames and support devices are arranged to distribute the load, with the spacing calculated based on the weight of the shield body. The bottom of each steel arch frame consists of several segments, with pre-settlement devices installed between adjacent segments. The advantage of this invention is that the segments subside to varying degrees in localized areas. Based on the subsidence, the inner arc support surface of the steel arch frame is reinforced and repaired. Subsequently, the shield body is guided through by the support device and channel steel, preventing tunnel structural instability and improving the safety of shield passage.
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