›› 2006, Vol. 27 ›› Issue (S1): 1097-1102.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Effect of rainfall on stability of anisotropic soil slope

FAN You-wei 1，ZHANG Yu 2，JIN Xue-lian1，MA Yun-qiao3   

  1. 1. The Co. Ltd. of Nanjing Institute of Surveying, Mapping & Geotechnical Investigation, Nanjing 210005, China； 2. College of Civil Engineering, Southeast University , Nanjing 210096, China； 3. Nanjing Qinhuai River Construction and Development Co. Ltd., Nanjing 210010, China
  • Received:2006-06-25 Published:2006-12-15

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Abstract: This paper presents a procedure for calculating the safety factor for an unsaturated and anisotropic slope suffering from rainfall infiltration. The process of infiltration into a slope due to rainfall and its effect on soil slope behavior were examined using a one-dimensional finite element flow deformation coupled analysis program. The modified Mohr-Coulomb failure criterion was adopted for unsaturated soil strength considering variations in strength due to the presence of matric suction. A safety factor was calculated based on the smoothed stress field obtained from finite element analysis; and an optimization technique was used to search for a critical slip surface. Some numerical examples are analyzed. The results illustrate a typical process of infiltration into unsaturated soil slopes and the effect of hydraulic conductivity on slope stability during reinfall-induced infiltration. And the analytical data indicate that the existence of the cranny has a distinct effect on anisotropic slope stability. The effect of cranny should be considered in analyzing stability of slope infiltrating by rainfall.

Key words: slope stability, rainfall, infiltration, cranny

CLC Number: 

  • TU 441.33
  • 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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