›› 2011, Vol. 32 ›› Issue (S1): 719-0724.

• Numerical Analysis • Previous Articles     Next Articles

Numerical simulation and model test study of mechanismof bolt in deep tunnel

CHEN Hao1, REN Wei-zhong1, LI Dan2, XIA Bin-wei3   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. College of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;3. Key Lab. for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering of Education Ministry, Chongqing University, Chongqing 400030, China
  • Received:2010-12-16 Online:2011-05-15 Published:2011-05-16

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Abstract: According to rock character of a certain soft rock tunnel of Chongqing, the model material is made from epoxy resin, polyamide, silicom rubber, firming agent of silicon rubber, quartz grit, powdery barite and gasoline. The physical model test of the unreinforced tunnel and bolt-reinforced tunnel are made in the true triaxial model test machine. By using strain measure technology, the strains of key parts of the surrounding rock and the bolt are measured; according to these data, the variability of the stress of surrounding rock and the variability of the axial force of the bolt are analyzed. The numerical simulation are made with the same boundary condition as the model test; according to these data, the plastic zone, stress field and the deformation of the surrounding rock are studied; the variation of the axial force of the bolt is studied. We compare the variation of stress of the surrounding rock and the variation of the axial force of the bolt of the model test with the numerical simulation and draw the conclusion that the two processes coincide with each other.

Key words: deep tunnel, physical model test, numerical simulation, bolt, true triaxial model test machine

CLC Number: 

  • TU 470
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