›› 2006, Vol. 27 ›› Issue (S1): 103-107.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Seepage and stability analysis of saturated-unsaturated soil slope under rainfall infiltration

LIU Jin-long1，LUAN Mao-tian1～3，WANG Ji-li1，YUAN Fan-fan1   

  1. 1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 3. Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2006-03-26 Published:2006-12-15

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Abstract: Based on the theory of unsaturated soil, seepage and stability of slope under rainfall infiltration are studied with finite element method. It is shown that the matric suction reduced by rainfall infiltration is the key factor which causes the slope stability decreased. Furthermore, the influence of different values of matric suction and different locations of cracks on slope stability is analyzed. Results show that the greater values of matric suction, the greater factor of safety (FOS) of slope at primary state of rainfall, while this effect will decreased with rainfall went on. It is convenient for rainfall infiltration with cracks, so the FOS decreased by cracks in general. The FOS controlled by downstream cracks of slope at primary state of rainfall, while the upstream cracks will become more important to FOS with continuous rainfall.

Key words: analysis of slope stability, unsaturated soil, rainfall infiltration, matric suction, crack, factor of safety

CLC Number: 

  • TU 452
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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