TBM shield and using method thereof

By introducing a chain plate mechanism and hydraulic motor into the TBM shield, the tensioning and tooth cutting functions are used to reduce the friction between the surrounding rock and the shield, the TBM card machine problem is solved, the construction efficiency and safety are improved, and the TBM is in poor condition. Stable operation under geological conditions.

CN119163427AActive Publication Date: 2024-12-20CHINA RAILWAY 18TH BUREAU GRP CO LTD
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Patent Information

Application Number
CN202411365292.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-29
Publication Date
2024-12-20
Estimated Expiration
2044-09-29

AI Technical Summary

Technical Problem

During TBM construction, when the convergence and deformation speed of the surrounding rock is too fast, the shield is easily stuck, resulting in a jamming accident. The existing excavation method has limited digging depth and is difficult to control the TBM posture, which affects construction efficiency and safety.

Method used

Design a TBM shield, including a cutter wheel, main drive, top shield, chain plate mechanism and hydraulic motor. Through the tensioning and tooth cutting function of the chain plate mechanism, the friction between the surrounding rock and the shield is reduced, ensuring the front and back of the TBM. Movement ability and avoid jamming by digging rock formations.

Benefits of technology

It effectively reduces the occurrence of TBM card machine accidents, improves construction efficiency and safety, and ensures that TBM can pass through the deformation section smoothly under large deformation and rock burst conditions.

✦ Generated by Eureka AI based on patent content.

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    Figure CN119163427A_ABST
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Abstract

The TBM shield comprises a cutter head (1), a main drive (2) is arranged at the rear end of the cutter head (1), a top shield (3) is arranged on the main drive (2), a top shield flange plate (4) is horizontally arranged on the top shield (3), and a chain plate mechanism is arranged on the top shield flange plate (4) and surrounds the top shield flange plate (4). The device has the advantages of being ingenious in structural design, reliable in use and low in cost, by means of the device, under the unfavorable geological conditions of large deformation, rock burst and the like, the friction force between surrounding rock and a shield can be reduced, a TBM has the front-back moving capacity, and the TBM blocking accident is reduced; meanwhile, the rock stratum can be excavated in an expanding mode through the cutting teeth, and it is guaranteed that the TBM smoothly passes through the deformation section.
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Citation Information

Patent Citations

  • Shield tube push bench with super-large rectangular cross section

    CN104088647A

  • Tunnel boring machine

    CN107620595A

  • Mud-water open double-mode tunnel boring machine

    CN109083651A

  • Full-section hard rock tunnel boring machine

    CN114508359A

  • Tunnel excavator and excavation method

    JP1997273391A