›› 2007, Vol. 28 ›› Issue (S1): 393-397.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Numerical simulation on deformation and failure of surrounding rock in high in-situ stress and its verification in physical model

ZHAO Yu1,2, LI Xiao-hong2, GU Yi-lei2, CHEN Lu-wang3, LI Dan4, CHEN Hao4   

  1. 1.College of Civil Engineering, Chongqing University, Chongqing 400030, China; 2. Key Lab. for the Exploitation of Southwest Resources & the Environmental Disaster Control Engineering Ministry of Education, Chongqing 400030, China; 3. School of Resources and Environment, Hefei University of Technology, Hefei 230009, China; 4.Key laboratory of Rock and Soil Mechanics, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China
  • Received:2007-05-31 Online:2007-10-25 Published:2014-03-28

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Abstract: Structure and support failures of tunnels are common problems for deep tunnels in high in-situ stress rock masses and they have more requirement on support designing. Based on the alteration of surrounding pressure and the strength of engineering rock mass, the mechanism of deformation and failure of surrounding rocks of the tunnel constructed in high in-situ stress rock masses is studied. According to rock character of a certain tunnel of Chongqing, the Mohr-Coulomb criterion with tension cut-off strain- softening model is adopted, a three-dimensional nonlinear simulation for it has been carried out. The distribution of plastic zones, tensile stress zones ,displacements and the progressive failure of the surrounding rock is analyzed , the failure law of the surrounding rock in high in-situ stress. For application in site ,the physical model results is used and the results agree with the numerical model.

Key words: high in-situ stress, surrounding rock, strain-softening, physical model

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