›› 2013, Vol. 34 ›› Issue (12): 3520-3526.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of shear properties of weathered schist residual soil

LIU Sheng-li1, 2, CHEN Shan-xiong3, LIU Wei3, YU Fei3, LUO Hong-ming3, ZHAO Wen-guang2   

  1. 1. Guangzhou Military Architectural Design Institute, Guangzhou 510075, China; 2. Hubei Key Laboratory of Control Structure, College of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2012-08-15 Online:2013-12-10 Published:2013-12-19

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Abstract: To study the shear property of weathered schist residual soil, in-situ direct shear tests was carried out at a slope project in northwest mountain area of Hubei province; and the structural composition, fracture characteristics, relationship of stone ratio and waviness and so on were analyzed. The results show that: The stress and strain curves show strain hardening features, and no obvious peak. The lonely stone and cluster stones are rolling and gnawing fracture in shear surface. There is an approximate linear relationship between waviness of shear surface and stone ratio; and the value of waviness increases with the increase of stone ratio. The climbing effect may cause shear dilation and increase of shear stress and normal stress. With increase of normal stress, the failure mechanism in shear surface turns sliding into gnawing fracture; and the ratio of shear-normal stress is in decrease. The results can be referenced for deformation and stability analysis of slope projects.

Key words: weathered schist, residual soil, direct shear tests, structural characteristics, stone ratio, waviness, ratio of shear-normal stress

CLC Number: 

  • TU 459+.2
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