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《Journal of University of Science and Technology Beijing》 2011-09
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Analytic solutions for surrounding rock mass deformation of circular tunnels subjected to axisymmetric loads

CUI Fang1,2),GAO Yong-tao2),WU Shun-chuan2)1) School of Civil Engineering,Henan Polytechnic University,Henan 454000,China2) School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China  
According to the gradual deformation principle of surrounding rock mass under the in-situ three-dimensional stress condition after tunnel excavation,the deformation characteristics of the rock mass was analyzed and the rock mass was zoned rationally.It is assumed that the rock mass is governed by the twin shear stress three-parameter criterion in the unified strength theory.The analytical solutions of some factors were deduced under axisymmetric loads,including the stress field,strain field,support force and plastic radius in the plastic zone.The case analysis result shows that this selected strength theory matches to the actual strength characteristics of the rock mass due to taking the effect of intermediate principal stress into account.
【Fund】: 国家高技术研究发展计划资助项目(SQ2008AA11Z1469936)
【CateGory Index】: U451.2
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