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Research on stability of the fissured slope with swell-shrink under rainfall conditions

Ni Jun;Jin Zaibao;Mei Ling;Yan Zhonglei;School of Architecture and Civil Engineering,Jiangsu University of Science and Technology;Zhenjiang City Land Resources Bureau;  
Taking a fissured slope with swell-shrink as an example,and based on the theory of unsaturated soil mechanics,this paper uses finite-element method to calculate and analyze the safety factor of slope stability under rain infiltration and studies location of fissures,depth of fissures and intensity of rainfall effect on stability of the fissured slope with swell-shrink. The results show that the stability is lowest when the fissures is located on the slope face,the stability is lower when the fissures is located at the slop top,and the stability is safe when the fissure is located at the slope toe. Throughout the process of rainfall,the safety factor of slope stability decreases with the increase of fissures depth; the slope stability drops significantly with the increase of rainfall,but as the rain continues,the stability finally became saturated.
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