›› 2011, Vol. 32 ›› Issue (6): 1637-1642.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Behavior of anisotropic mica sand under fixed principal stress axes drained shear test

YU Yi-lin1, ZHANG Jian-min1, TONG Zhao-xia2, ZHANG Ga1   

  1. 1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 2. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
  • Received:2009-10-12 Online:2011-06-10 Published:2011-06-21

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Abstract: Nanjing mica sand is anisotropic because of its contents of flake grains. A series of drained tests for principal stress axes was fixed at 10°, 30°, 60°, 80° were conducted with an automated hollow cylinder apparatus in Hong Kong University of Science and Technology, in order to study the inherent anisotropic characters of mica sand. During the tests, the coefficient of intermediate principal stress was fixed at 0.1, 0.5 and 1.0, and the beginning density of sand was same. When the orientation angle of major principal stress changes from 0° to 90°, the shear strength of mica sands at first tends to reduce, reaches its minimum value at the orientation angle of 60°, and then increases gradually. The coefficient of intermediate principal stress has a great impact on the shear strength and deformation of anisotropic sands

Key words: principal stress direction angle, anisotropy, coefficient of intermediate principal stress, mica sand

CLC Number: 

  • TU 443
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