›› 2012, Vol. 33 ›› Issue (6): 1719-1723.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of shear strength water sensitivity of intact schist from Guzhu expressway

LIU Jian，LI Jian-peng   

  1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2011-01-10 Online:2012-06-11 Published:2012-06-14

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Abstract: Shear tests along bedding plane on Guzhu expressway schist under natural state and water-saturated state have been carried out in order to analyze the shear strength characteristics of the water-sensitive schist located in northwest of Hubei province under the two states. The results show that：compared with the native state, the cohesion force of the schist under saturation state decreased by 36.7%; the internal frictional angle decreased by 4.6%; the residual cohesion force decreased by 66.7%; the residual internal frictional angle decreased by 11.3%; it is different from the brittle fracture under natural state that the schist shows obvious characteristic of ductility at failure under saturation state. Based on the experimental results，the water weakening mechanism of shear strength parameters of schist has been discussed; a safety factor of a slope located in Guzhu expressway has been computed with limit equilibrium method; and then the evaluation of the slope stability under storm or continuous rainfall conditions has been made.

Key words: water-sensitive schist, shear strength, safety factor

CLC Number: 

  • TU 459+.2
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