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Mechanism of action of cracks water on rock landslide in rainfall

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Abstract

In worldwide, the most common triggering factor of rock landslides is extended and intense rainfall. However, different from the soil slope failure caused by softening action of infiltration rainwater, the mechanism of rock landslide in rainfall is not clear. From the view of fracture mechanics, the propagation of cracks on rock slope and the development of sliding surface were researched. Then based on hydraulics formulas and using Sweden arc method, the influence of crack water on stability of rock slope was quantitatively studied. Finally, an example was given to check the theoretical approach. The result shows that the development of sliding surface of rock slope is mainly caused by crack propagation under hydrostatic pressure when the stress intensity factor K I at crack tip is bigger than the toughness index of rock fractures K IC, and the failure of slope is the result of hydraulic action of crack water and the softening of materials on sliding surface when the depth of crack water is bigger than a minimum value h min.

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Authors and Affiliations

  1. Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu, 610041, China

    Yong Wu  (吴永), Si-ming He  (何思明) & Xin-po Li  (李新坡)

  2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China

    Yong Wu  (吴永), Si-ming He  (何思明) & Xin-po Li  (李新坡)

Authors
  1. Yong Wu  (吴永)
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  2. Si-ming He  (何思明)
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  3. Xin-po Li  (李新坡)
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Corresponding author

Correspondence to Yong Wu  (吴永).

Additional information

Foundation item: Project(2008CB425802) supported by the National Basic Research Program of China; Project(40872181) supported by the National Natural Science Foundation of China; Project(09R2200200) supported by the West Light Foundation of Chinese Academy of Sciences

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Wu, Y., He, Sm. & Li, Xp. Mechanism of action of cracks water on rock landslide in rainfall. J. Cent. South Univ. Technol. 17, 1383–1388 (2010). https://doi.org/10.1007/s11771-010-0646-6

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  • DOI: https://doi.org/10.1007/s11771-010-0646-6

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