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《Rock and Soil Mechanics》 2012-09
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Experimental study of relationship between water content and strength or deformation of slip soil

HUANG Bin1,2,3,FU Xu-dong1,TAN Fan2,3,WU Zhong-ming2,3(1.School of Civil and Architectural Engineering,Wuhan University,Wuhan 430072,China; 2.Geotechnical Division,Yangtze River Scientific Research Institute,Wuhan 430010,China;3.Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Yangtze River Scientific Research Institute,Wuhan 430010,China)  
In order to study the influence of water content on the strength and deformation of slip soil,select a large scale landslide's slip soil is selected to conduct consolidated-drained triaxial shear test with different initial saturations.Study the volume strain of unsaturated soils is studied by adopting a new gas and water converting device.The results show that the water content has great influences on the strength of slip soil;the higher the initial saturation is,the lower the strength value is.Strength parameter c with saturation is the ladder-like drop relationship;and linear relation could be established between strength parameters ? and initial saturation.The higher water content is,the smaller the soil sample's volume deformation is;and the parameters of Duncan-Chang model such as K,Kb,and G are affected largely by water content;and then the linear formula could be established between the initial saturation and these parameters of Duncan-Chang model.But other parameters of Duncan-Chang model such as n,m,F,Rf,and D,which are little affected by water content,have little difference value under different initial saturations,so the averages are made as the model parameters under different saturations.
【Fund】: 长江科学院中央级公益性科研院所基金(No.CKSF2013035);; 水利部公益性行业科研专项(No.201201039)资助
【CateGory Index】: TU411
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