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Volume 34 Issue 8
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Abstract
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WANG Hui, CHEN Wei-zhong. Sensitivity analysis of mechanical parameters to deformation of surrounding rock in Galongla tunnel[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1548-1553.
Citation: WANG Hui, CHEN Wei-zhong. Sensitivity analysis of mechanical parameters to deformation of surrounding rock in Galongla tunnel[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1548-1553.
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Sensitivity analysis of mechanical parameters to deformation of surrounding rock in Galongla tunnel

  • (1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Department of Resources and Civil Engineering, Shandong University of Scinence and Technology, Tai'an 271019, China)

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  • Received Date: October 23, 2011
  • Published Date: August 19, 2012
    Graphical Abstract
    • Abstract
  • Taking Galongla tunnel as an example, a finite element model of variable parameters is established according to the geological conditions. On the basis of deformation monitoring data, back analysis is performed for the mechanical parameters including elastic modulus, Poisson's ratio, cohesion, internal friction angle and lateral pressure coefficient in order to get the real values of surrounding rock. Then the proposed sensitivity analysis method is employed to study the sensitivity of the mechanical parameters of surrounding rock to deformation. The results show that, for vault settlement, the elastic modulus is more sensitive than the other parameters. For the surrounding convergence which is opposite to the vault settlement, the Poisson's ratio, cohesion and internal friction angle are more sensitive than the elastic modulus. The results of this study have a certain reference value for the stability analysis of Galongla tunnel.
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    • References (13)
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