›› 2010, Vol. 31 ›› Issue (11): 3599-3603.

• Numerical Analysis • Previous Articles     Next Articles

Stability analysis of tunnel supporting structure under complex condition

JIA Jian-qing 1, 2，WANG Hong-tu 2, 3，LI Jing1，ZHANG Xian1，HU Guo-zhong2   

  1. 1. School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, China; 2. Key Lab for the Exploitation of Southwestern Resources & the Environmental Hazard Control Engineering of Education Ministry, Chongqing University, Chongqing 400044, China; 3.State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, Chongqing University, Chongqing 400030, China
  • Received:2009-04-08 Online:2010-11-10 Published:2010-11-24

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Abstract:

Taking Fangdoushan tunnel for example, the 3D finite element model is built; and the stability of tunnel supporting structure is simulated and analyzed. The horizontal stresses, vertical stresses and displacement, anchor bar axial forces and the failure fields of the section which distance to the hole is about 10 m are analyzed; and the characteristic points of the section on the supporting structure is studied too. The results show that the stresses and displacements increase when the distance between the section and heading face are less than 30 m; after that, the stresses and displacements is convergent; and the increments are small. All of these show that the supporting structure is stable. The numerical simulation results of primary support stress and axial force of anchor bar are compared with the monitored results, from which it can be known that they are consistent basically.

Key words: tunnel, supporting structure, stability

CLC Number: 

  • U 457
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