›› 2011, Vol. 32 ›› Issue (2): 380-386.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study for shear strength characteristics of sandstone under water-rock interaction effects

LI Peng 1, 2, LIU Jian2, LI Guo-he1, ZHU Jie-bing3, LIU Shang-ge2   

  1. 1. Third Railway Survey and Design Institute Group Corporation, Tianjin 300142, China; 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2009-09-21 Online:2011-02-10 Published:2011-02-16

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Abstract:

Shear strength tests of sandstone under different hydrochemical environments were carried out. The effect of hydrochemical action on sandstone structure was analyzed from the viewpoint of meso-mechanism; and the mechanism of hydrochemical damage of sandstone was discussed. On this basis, the effect of hydrochemical action on shear strength of sandstone was analyzed; and a variable was introduced to quantitatively express the hydrochemical damage evolution of shear strength parameters. Moreover, the evolution of hydrochemical damage degree of Chongqing sandstone under certain environment was simulated by chemical kinetics method. Based on the simulation, the shear strength parameters can be predicted. The study results can be used as a valuable reference to quantitatively evaluate the hydrochemical corrosion of rock; so as to offer an effective method to estimate the safety and stability of rock engineering under water-rock interaction effects.

Key words: sandstone, hydrochemical action, shear strength, cohesion strength, internal friction angle, chemical kinetics

CLC Number: 

  • TU 452
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