A test device and method for cutting a mud cake by a shield cutter under pressure

By designing a shield cutterhead cutting mud cake test device with a pressurization mechanism and a rotation lifting mechanism, the problem of the inability to realistically simulate mud cake evolution in existing technologies has been solved, achieving higher construction efficiency and data accuracy.

CN122448671APending Publication Date: 2026-07-24CHINA RAILWAY 16TH BUREAU GRP CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY 16TH BUREAU GRP CO LTD
Filing Date
2026-04-21
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The existing shield cutterhead mud cake test device cannot realistically simulate the evolution process of mud cake under the coupled effects of pressure, shear and opening ratio, resulting in low construction efficiency.

Method used

An experimental device was designed, comprising a pressurizing mechanism, a cutter head mechanism, and a rotary lifting mechanism. The device applies simulated oncoming pressure from bottom to top through a rubber airbag and a piston plate. Combined with detachable blades to adjust the opening ratio and a servo motor to drive the cutter head to rotate, the device dynamically simulates the formation process of mud cake.

Benefits of technology

It achieves a realistic simulation of the mud cake formation process, improves the dynamic testing capability of experimental data, and enhances construction efficiency and data consistency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to a kind of test device and method of cutting mud cake under pressure of shield cutter, belong to engineering test testing field.The test device and method of cutting mud cake under pressure of shield cutter, comprising: test cylinder assembly, the test cylinder assembly includes support frame and inside experimental component, the support frame includes stainless steel base, steel support rod and support table;The present device is simulated by the rubber air bag of pressure mechanism and piston plate from bottom to top The head-on pressure is applied, so that the stress direction of cutter mechanism approaches the actual working condition of shield excavation face, solve the problem that the one-way loading direction of prior art top does not conform;Meanwhile, the detachable blade of cutter mechanism and pointed bolt realize the continuous adjustable opening rate, and with the electric cylinder and servo motor of rotary lifting mechanism cooperate and drive cutter mechanism to carry out rotary cutting dynamic simulation, complete the evolution of mud cake under the action of pressure direction, opening rate change and shear coupling.
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Citation Information

Patent Citations

  • A test device and test method for shield cutterhead mud cake considering high temperature and high pressure

    CN115184177B