A spliced steel arch support device for a chamber and a construction method

The modular design of the spliced ​​steel arch support device enables height and angle adjustment and enhanced stability, solving the shortcomings of traditional steel arches in terms of transportation, installation and adaptability, and improving the construction efficiency and safety of underground engineering.

CN122359083APending Publication Date: 2026-07-10CHINA THREE GORGES UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA THREE GORGES UNIV
Filing Date
2026-04-20
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Traditional steel arch frames are difficult to transport and install in underground engineering, have poor adaptability to height and cross-section, and insufficient support stability, making it difficult to meet the construction needs of complex geological conditions and special cross-section caverns.

Method used

The system employs a modular steel arch support device, which includes a support adjustment mechanism, a side support mechanism, a lateral connection mechanism, and a top arch mechanism. Through modular design, it achieves height adjustment, angle adjustment, and enhanced stability. Each component can be quickly disassembled and reused.

Benefits of technology

It improves the convenience of transportation and installation, adapts to different cavern cross-sectional dimensions, enhances resistance to lateral displacement and overturning, reduces construction costs and safety risks, and meets the construction needs under complex geological conditions.

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Abstract

This invention relates to a modular steel arch support device and construction method for underground caverns, belonging to the technical field of underground engineering support equipment. It aims to solve the problems of inconvenient transportation and installation, poor adaptability to height and cross-section, and insufficient support stability of traditional steel arch supports. The device consists of a support adjustment mechanism, a side support mechanism, a lateral connection mechanism, and a top arch mechanism. The support adjustment mechanism allows for flexible overall height adjustment; the side support mechanism tightly abuts against the cavern sidewall, enhancing lateral stability; the lateral connection mechanism accurately completes multi-unit splicing and positioning; and the top arch mechanism can flexibly adapt to various complex cavern cross-sectional shapes. During construction, the device is first disassembled and transported to the site, then spliced ​​and installed using bolts, eliminating the need for large hoisting equipment and on-site welding. This invention offers advantages such as convenient assembly and disassembly, strong adaptability, and stable support, meeting the high-efficiency support requirements of large-span, complex-section underground caverns, significantly improving construction efficiency, and ensuring overall structural safety.
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Citation Information

Patent Citations

  • Surrounding rock steel arch support construction method

    CN119122570A

  • Spliced steel arch frame

    CN209724364U