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《Chinese Journal of Underground Space and Engineering》 2008-03
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Mechanism Analysis on Dual Reduction Factors about the Progressive Failure of Slope

TANG Fen~(1,2) ZHENG Ying-ren~1 (1.Department of Military Construction Engineering,Logistic Engineering University,Chongqing 400041,China;2.Chongqing Communications University,Chongqing 400042,China)  
Slope destruction is a progressive process.Because of the change of water content and strain accumu- lation,different decay rate of the shear strength parameters c and(?) the shear bands were formed.As the shear bands expanded,at last overall instability was happened in the slope.Stability or instability of slope is the result of joint effect of shear strength parameters c and(?).When the slope slides,the cohesive force c reacts first,then gradually the internal friction angle(?) follows.So the safety margin is different forc and(?).The strength attenuating characteris- tic of the soil and mechanism of c and(?) are analyzed in this paper.According to the different decay rate ofc and(?). a mode with the reduction factor of cohesive c bigger than internal friction angle(?) was put forward.The mode put for- ward in this paper,is for discussion and gradually to form a common knowledge.
【CateGory Index】: TU43
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