›› 2013, Vol. 34 ›› Issue (11): 3180-3186.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of shear strength characteristics of simulation rock structural planes based on multi-size direct shear tests

HUANG Man1，DU Shi-gui1，LUO Zhan-you2，NI Xiao-hui1, 3   

  1. 1. Department of Civil Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China; 2. Geotechnical Engineering Institute, Zhejiang University of Science and Technology, Hangzhou 310023, China; 3. Administrative Committee of Jiaxing Export Processing Zone in Zhejiang Province, Jiaxing, Zhejiang 314000, China
  • Received:2013-07-10 Online:2013-11-09 Published:2013-11-11

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Abstract: It has important value of theory and practical significance to understand the mechanical characteristics of rock structural planes by taking direct shear tests for shear strength of simulation rock structural planes with different sizes (especially large sizes). Based on MSJ-DST, the direct shear tests of simulation rock structural planes in sizes 20 cm×20 cm, 40 cm×40 cm, 60 cm×60 cm, 80 cm×80 cm and 100 cm×100 cm are taken under the normal stresses from 200 kPa to 1 000 kPa. Then, the characteristics of shear strength of rock structural planes with different sizes are studied. The results indicate that the stresses and deformation characteristics of simulation rock structural planes under different normal stresses are similar; and the peak shear displacements are generally fluctuated in the vicinity of a certain value. Under the same normal stress, the peak shear strength values of simulation rock structural planes with different sizes are fluctuated in the vicinity of a certain value; and the residual shear strength values rise slightly as the size increases. Under five grade normal stresses, the variations of peak shear strength and residual shear strength with different sizes are approximately same; and the ratio of residual shear strength value and peak shear strength value increases and tends to be stable as normal stress increases.

Key words: different sizes, simulation rock structural plane, direct shear test, shear strength

CLC Number: 

  • TU 458
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