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《Chinese Journal of Underground Space and Engineering》 2005-06
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Back Analysis from Instability and Strength Degradation in Roadbed and Cutting of Underground Karst Cavity

LI Jian~1,DENG Jin-yu~1,YUAN Zhen~2,HUANG Xiao-yan~2,LI Yong-bin~2,WANG Yu-biao~2(1.Hunan Province Freeway Management Office,Changsha 410001 P.R.China;2.Changsha University of Science and Technology,Changsha 410076 P.R.China)  
According to the problem of failure and instability in roadbed and cutting engineering of underground karst cavity,on the basis of inhomogeneous elastic damage model,this thesis propose the FEM back-analysis from instability-strength degradation,to describe inhomogeneity of material suppose that the material parameter obeys statistical distribution.Analyzing the instance in roadbed and cutting engineering of underground karst hole through strength degradation,it reproduces the breaking and steady losing process of the roadbed and cutting the intensity parameter during losing steadily is gained,it has certain directive significance to the roadbed and cutting engineering.
【Fund】: 湖南省教育厅科学基金重点项目(01A019);; 湖南省交通科技项目(2002-17);; 湖南省自然科学基金项目(01JJY2041)资助
【CateGory Index】: U416.1
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