›› 2013, Vol. 34 ›› Issue (4): 1156-1162.

• Numerical Analysis • Previous Articles     Next Articles

Back analysis of coupled seepage-stress fields in anisotropic rocks

WU Chuang-zhou1, YANG Lin-de1, LIU Cheng-xue2, LI Peng3   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Shenzhen Metro Group Co., Ltd., Shenzhen, Guangdong 518000, China; 3. Institute of Applied Mechanics, Graz University of Technology, Graz, Austria
  • Received:2012-09-27 Online:2013-04-10 Published:2013-04-16

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Abstract: A new method for determining of parameters simultaneously in the coupled seepage-stress analysis in anisotropic rock is essential for large-scale cavern shape selection, stability analysis, and rock support system design. Based on the Levenberg-Marquit optimization method, a modified method has been put forward by employing a new step factor matrix , in order to calculate both of the parameters of rock mass modulus (E), the in situ stress (P) and the permeability coefficient (K) in the back analysis. Compared with traditional step factor in optimization algorithm, the new step factor matrix can change the step factors respectively according to the different sensitivities of parameters, with which a new algorithm is established on MATLAB platform. Two case studies show the method’s feasibility and validity in the coupled seepage-stress analysis in a anisotropic rock tunnel engineering; and the results demonstrate that the modified method with new step factor can improve convergence of iterative algorithm obviously which cannot be solved with traditional step factor.

Key words: anisotropic rock, coupled seepage-stress analysis, back analysis

CLC Number: 

  • TU 452
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