Infiltration and stability of shallow landslide under intensive rainfall conditions

被引：0
|
作者：
Wang J. [1 ]
Leng X. [1 ]
Ruan H. [1 ]
Liu S. [1 ]
Cui Z. [1 ]
机构：
[1] State Key Laboratory of Geomechanics and Geotechanical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2016年 / 46卷
关键词：
Intensive rainfall; Object choice; Shallow landslide; Slope infiltration; Stability evaluation;
D O I：
10.3969/j.issn.1001-0505.2016.S1.027
中图分类号：
学科分类号：
摘要：
The influence of rainfall infiltration on the slope stability was improved based on a rainfall infiltration model. On the basis of Mein-Larson infiltration model, the concept of slope surface water strength and infiltration capacity was proposed. Stability evaluation models considering weakening of strength parameters by water were used for uniform slopes under rainfall conditions. The model was established by combining slope rainfall infiltration model with the infinite slope limit equilibrium method. The rainfall infiltration and the stability for a typical slope were investigated. The results show that the slope surface water strength and infiltration capacity decrease, when the slope angle increases. The calculated stability results demonstrate that the solid particles and water mixture have the same result with the soil skeleton under the condition of rainfall. The rainfall intensity is an important parameter to control the stability of landslide. The migration rate of wetting front and the attenuation of infiltration capacity velocity show a rising trend with the increase of rainfall intensity. The rainfall causes wetting front moving deeply and results in the slope safety factor decreasing. Once the safety coefficient of the slope reaches a critical state, the slope failure occurs. © 2016, Editorial Department of Journal of Southeast University. All right reserved.
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页码：153 / 158
页数：5
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