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Volume 34 Issue 2
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YAN Dong-xu, XU Wei-ya, WANG Wei, SHI Chong, SHI An-chi, WU Guan-ye. Research of size effect on equivalent elastic modulus of columnar jointed rock mass[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(2): 243-250.
Citation: YAN Dong-xu, XU Wei-ya, WANG Wei, SHI Chong, SHI An-chi, WU Guan-ye. Research of size effect on equivalent elastic modulus of columnar jointed rock mass[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(2): 243-250.
shu

Research of size effect on equivalent elastic modulus of columnar jointed rock mass

  • 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Research Institute of Geotechnical Engineering, Nanjing 210098, China; 3. East China Hydropower Investigation and Design Institute, Hangzhou 310014, China

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  • Received Date: December 26, 2010
  • Published Date: February 19, 2012
    Graphical Abstract
    • Abstract
  • Based on Baihetan Hydropower Project on Jinsha River, 3D discrete element models for columnar jointed rock mass are established considering the relevant methods of rock mechanics. Numerical simulations of triaxial compression tests on the columnar jointed rock mass are carried out. The impacts of diameter change on the equivalent elastic modulus of hexagonal columnar jointed rock mass as well as those of side length and joint stagger change on the equivalent elastic modulus of quadrangular columnar jointed rock mass are studied. In order to investigate the impacts of size change on the equivalent elastic modulus of random columnar jointed rock mass, a program for controlling columnar size is proposed using the average large diagonal size. Then the impacts of change of the average large diagonal size on the equivalent elastic modulus are studied. It is shown from the researches on size effect and comparison with the in-situ tests that changes in cylinder size have larger impacts on the equivalent elastic modulus perpendicular to cylinder than on that parallel to cylinder. Changes in stagger of quadrangular columnar jointed rock mass mainly have impacts on the equivalent elastic modulus parallel to stagger and have weak impacts on the equivalent elastic moduli in two other directions. The results can provide reference for the determination of mechanical parameters in engineering practice.
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    • References (26)
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