›› 2009, Vol. 30 ›› Issue (7): 1967-1973.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Equivalent mechanical model of joined rockmass reinforced by shotcrete lining and its application

FU Cheng-hua1, ZHOU Hong-bo2, CHEN Sheng-hong2   

  1. 1. School of Energy and Environment, Xihua University, Chengdu 610039, China; 2. Ertan Hydropower Development Company, Ltd., Chengdu 610021, China; 3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
  • Received:2008-11-03 Online:2009-07-10 Published:2011-03-10

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Abstract:

A rheological model of equivalent simulation has been presented by considering the lining’s action of controlling shear and crack on joints and fractures; and on this base, the constitutive equation of jointed rock mass reinforced by shotcrete lining has been deduced; so the equivalent mechanical model of jointed rock mass reinforced by shotcrete lining has been established. When a structure is analyzed by using this mechanical model, joints or shotcrete linings need not to be discreted grids, and are equivalently simulated. If the number and direction of joints or the thickness of shotcrete lining are changed in the analysis of structures, the finite element mesh will keep unchanged. In this way, the pre-treatment workload is reduced and the analysis of the large scale rock structures becomes relatively convenient. Finally, this mechanical model has been verified by examples－not only effective in the simulation of the mechanism of shotcrete lining similar to discrete model, and convenient and practical for the complicated structures similar to equivalent simulation; it will be of good practical application.

Key words: shotcrete lining, jointed rockmass, equivalent simulation, rheological model, constitutive equation

CLC Number: 

  • TU443
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