Method and system for evaluating abrasion loss of shield cutter in composite stratum

The shield cutter wear assessment system, which features real-time monitoring and strategy switching, solves the problems of real-time and accuracy assessment of wear in composite strata. It enables flexible adaptation and efficient assessment of different strata, thereby improving construction safety and efficiency.

CN121542640AInactive Publication Date: 2026-02-17CHINA RAILWAY NO 3 GRP CO LTD +2
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Patent Information

Application Number
CN202511775631.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-28
Publication Date
2026-02-17
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing methods for assessing the wear of tunnel boring machine cutters lack real-time capability in complex geological formations, making it difficult to accurately distinguish the causes of uniform wear, impact wear, and abnormal wear. This results in low assessment accuracy, insufficient adaptability, and a tendency to underestimate or overestimate the wear amount, affecting construction safety and efficiency.

Method used

The data acquisition module is used to monitor the torque, geological information and vibration signals of the tunnel boring machine in real time. Combined with the geological parameter fluctuation coefficient, the wear assessment strategy is switched through the strategy determination module. The wear mode is identified by using the deformation synergy index and the proportion of impact components. A self-optimization mechanism is established to dynamically adjust the assessment strategy to adapt to the complex strata.

Benefits of technology

It enables accurate assessment of the wear of shield tunneling cutters in composite strata, improving assessment accuracy and adaptability, reducing misjudgments and resource waste, and ensuring construction safety and efficiency.

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Abstract

The invention relates to the technical field of shield cutter abrasion loss evaluation, in particular to a composite stratum shield cutter abrasion loss evaluation method and system, and the method comprises the steps: determining an abrasion loss evaluation strategy of a cutterhead based on a geological parameter fluctuation coefficient; under the condition that the uniform wear evaluation strategy is determined to be started, the reference wear amount of the cutterhead is determined based on the deformation synergy index, and an impact wear evaluation strategy is started; under the condition of determining to start the impact wear evaluation strategy, determining an impact risk level based on the strength ratio, and determining whether the cutter head has a fracture risk based on the fluctuation amplitude and the impact risk level so as to start an abnormal wear evaluation strategy; under the condition that it is determined that the abnormal wear evaluation strategy is started, a preset variable coefficient is optimized based on the evaluation reliability of the cutterhead wear extent; the system comprises a data acquisition module, a strategy determination module, a uniform wear evaluation module, an impact wear evaluation module and an abnormal wear evaluation module. According to the method, the evaluation precision of the cutter abrasion loss of the shield tunneling machine is improved.
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