A new failure mechanism for deep cavity and upper bound solution 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...

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Bibliographic Details
Published in:Journal of Central South University 2017-09, Vol.24 (9), p.2082-2091
Main Authors: Zhang, Dao-bing, Liu, Zhi-zhen, Zhang, Jia-hua
Format: Article
Language:English
Subjects:
Engineering
Failure analysis
Failure mechanisms
Fatigue failure
Geotechnical engineering
Limit analysis
Metallic Materials
Underground structures
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Summary: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.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-017-3617-3