A vault protection support applied to small-section tunnel face excavation

CN224300907UActive Publication Date: 2026-05-29CHINA GEZHOUBA GRP THREE GORGES CONSTR ENG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA GEZHOUBA GRP THREE GORGES CONSTR ENG CO LTD
Filing Date
2025-06-17
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In the construction of hydraulic tunnels, the limited space of small-section tunnels makes it difficult to ensure the safety of construction workers, the inconvenience of operating machinery and equipment, and the difficulty of transporting tunnel muck, resulting in slow construction progress, long preparation time, and difficulty in ensuring safety.

Method used

Design an arch protection support for the excavation of small-section tunnel faces, including a support body, vertical columns, support rods and a walking system. The support rods are flipped and locked by a flipping device and locking pins. Combined with self-propelled wheels, it is easy to move, ensuring operation safety and shortening the process time.

Benefits of technology

This technology enables continuous blasting operations while ensuring the safety of construction personnel, shortening construction time, accelerating construction progress, improving work efficiency, simplifying operation procedures, and enhancing connection strength and protective effects.

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    Figure CN224300907U_ABST
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Abstract

The utility model provides a kind of be applied to small section tunnel face excavation vault protection support, including support main part, the bottom end fixed mounting of support main part has vertical column, the bottom end of vertical column is connected with support bar piece by overturning device, the bottom end fixed mounting of support bar piece has the walking system for moving entire protection support, walking system is supported on the basis of tunnel.This support can be used for small section tunnel face excavation, ensure the safety of operating personnel, and then realize continuous operation, shorten the construction time of each process, speed up construction progress;In addition, the device is simple in structure, easy to operate, can be realized under the premise of ensuring the safety of operating personnel, continuous operation is carried out, so as to help the substantial improvement of on-site construction progress.
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