›› 2012, Vol. 33 ›› Issue (5): 1485-1490.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on calculation model for stability evaluation of rainfall-induced shallow landslides

LI Ning1, 2, XU Jian-cong1, 2, QIN Ya-zhou1, 2   

  1. 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2011-09-15 Online:2012-05-10 Published:2012-05-14

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Abstract: Landslides are common geological hazard problems in China; many facts indicate that the rainfall is the main and common environmental factor controlling the instability of slope and triggering shallow landslides. In order to do better research on rainfall-induced shallow landslides, Mein-Larson model is developed based on VG model and modified Green-Ampt infiltration model; then combined with infinite slope stability model, a simplified calculation model is proposed for analyzing rainfall-induced shallow landslides. Compared with the simplified calculation model proposed before, the effect of slope and the characteristics of unsaturated soil are taken into account in this model; it can be used for analyzing rainfall-induced shallow landslides under two different rainfall patterns; and it has a wider range of applications. Compared with the results of FEM, conclusions can be drawn as follows: the results of the calculation model agree with that of FEM; and the safety factor is somewhat safe; so it can be used for analyzing rainfall-induced shallow landslides; the calculation model has simple formula, higher computational efficiency.

Key words: rainfall, infiltration model, infinite slope, unsaturated soils, shallow landslide

CLC Number: 

  • TU 434
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