›› 2013, Vol. 34 ›› Issue (3): 696-702.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of anisotropic equivalent elastic parameters of jointed rock mass

DI Sheng-jie1, 2，XU Wei-ya3，SHAN Zhi-gang1   

  1. 1. HydroChina Huadong Engineering Corporation, Hangzhou 310014, China; 2. Seaside and City Geotechnical Engineering Research Center, Zhejiang University, Hangzhou 310058, China; 3. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
  • Received:2012-05-11 Online:2013-03-11 Published:2013-03-20

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Abstract: Analytical formulas of anisotropic equivalent elastic parameters are established by using mechanical method of complex material. An example is made to show the feasibility and efficiency of the analytical formulas. Meanwhile, the coordinate transformation and jointed factor of regular jointed rock mass are considered. The rules of equivalent elastic parameters of regular jointed rock mass are studied. Variation rules of equivalent elastic parameters under different jointed factors are analyzed. Combining with the properties of columnar jointed rock mass in Baihetan dam site, the anisotropic characteristics and values of elastic parameters are analyzed. The results show that the jointed rock mass can degenerate into isotropic medium when the stiffness is equal; and the calculated values by using the method in the paper are well in accord with the test results in the dam site. The cylinder deflection has more effect on the equivalent elastic parameters. The results also show that after deflection, the horizontal elastic modulus and vertical modulus are reduced by 54% and 17% respectively. According to the curves, the higher the angle of cylinder, the greater reduction the elastic modulus would have. This change rule of equivalent elastic parameters revealed obvious anisotropic property of columnar jointed rock mass.

Key words: jointed rock mass, constitutive relation, anisotropy, equivalent elastic parameters

CLC Number: 

  • TU 452
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