›› 2011, Vol. 32 ›› Issue (6): 1607-1612.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of scale effect of deformation modulus for fractured rock mass —— part Ⅱ: Analytical method

YANG Jian-ping1, CHEN Wei-zhong1, 2, DAI Yong-hao1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China
  • Received:2010-07-23 Online:2011-06-10 Published:2011-06-21

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Abstract: An analytical method for estimating cracked rock mass equivalent deformation modulus is presented, by considering deformation of rock block and cracks separately. Verification of the method for determining the equivalent rock mass deformation modulus is conducted against closed-form solutions for regular cracked rock mass, leading to very good agreements. Furthermore, equivalent deformation modulus of the randomly cracked rock mass in Jinping hydropower station are studied. Results gained by the analytical method show that representative eleementory volume(REV) of the studied rock masses is 8 m, which is the same as the results achieved by finite element method. Study results show that the developed analytical method can be used in estimating the REV properties of fractured rock mass, which is of great important in parameters determination for fractured rock mass.

Key words: fractured rock mass, deformation modulus, scale effect, analytical method

CLC Number: 

  • TU 457
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