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A new failure mechanism for deep cavity and upper bound solution of supporting pressure 被引量:4

A new failure mechanism for deep cavity and upper bound solution of supporting pressure
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摘要 The investigation of supporting pressure is of great significance to the design of underground structures.Based on the kinematical approach of limit analysis,an improved failure mechanism is proposed,and the supporting pressure is investigated for deep buried cavity.Three failure mechanisms are first introduced according to the existing failure mechanisms of geotechnical structures of limit analysis.A comparison with respect to the optimal failure mechanisms and the upper bound solutions provided among these three mechanisms are then conducted in an attempt to obtain the improved failure mechanism.The results provided by the improved failure mechanism are in good agreement with those by the existing method,the numerical solution and field monitoring,which demonstrates that the proposed failure mechanism is effective for the upper bound analysis of supporting pressure. The investigation of supporting pressure is of great significance to the design of underground structures.Based on the kinematical approach of limit analysis,an improved failure mechanism is proposed,and the supporting pressure is investigated for deep buried cavity.Three failure mechanisms are first introduced according to the existing failure mechanisms of geotechnical structures of limit analysis.A comparison with respect to the optimal failure mechanisms and the upper bound solutions provided among these three mechanisms are then conducted in an attempt to obtain the improved failure mechanism.The results provided by the improved failure mechanism are in good agreement with those by the existing method,the numerical solution and field monitoring,which demonstrates that the proposed failure mechanism is effective for the upper bound analysis of supporting pressure.
出处 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第9期2082-2091,共10页 中南大学学报(英文版)
基金 Project(51674115)supported by the National Natural Science Foundation of China Project(51434006)supported by the Key Program of the National Natural Science Foundation of China Project(2015JJ4024)supported by the Natural Science Foundation of Hunan Province,China
关键词 deep cavity failure mechanism limit analysis upper bound solution 失效机理 支承压力 上限解 破坏机制 支撑压力 极限分析 地下结构 岩土结构
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