Shallow-buried bias tunnel operation period surrounding rock and lining structure overall stability evaluation method

• Main Authors: GUO HONGYAN, CAO PENG, XIA-YANG YUYU, ZHONG ZULIANG, LIU XINRONG
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR

The invention relates to a shallow-buried bias tunnel operation period surrounding rock and lining structure overall stability evaluation method, and belongs to the technical field of tunnel monitoring. Aiming at the operation safety problem a tunnel, a shallow-buried bias tunnel operation period overall stability analysis and evaluation method based on numerical limit analysis is provided, and the method comprises the steps of: obtaining a surrounding rock mass damage judgment standard (limit strain value) through equivalent rock numerical test analysis; then obtaining a damage judgment standard (limit strain value) of the concrete material through literature research and theoretical analysis; and finally, establishing a tunnel simulation analysis model. Under the condition that lining force structural parameters are kept unchanged, the lining force is reduced, the strength parameters of the surrounding rock are continuously reduced, the stable state and instability failure mode of the surrounding rock are a