| 考虑降雨特征的浅层边坡稳定性分析 |
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| 引用本文： | 韩金明,肖明.考虑降雨特征的浅层边坡稳定性分析[J].中国农村水利水电,2011(5). |
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| 作者姓名： | 韩金明 肖明 |
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| 作者单位： | 武汉大学,水资源与水电工程科学国家重点实验室,武汉,430072;武汉大学水工岩石力学教育部重点实验室,武汉,430072 |
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| 基金项目： | 国家自然科学基金重大研究计划项目(90715042); 国家杰出青年科学基金资助项目(50725931); “十一五”国家科技支撑计划项目(2008BAB29B01) |
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| 摘 要： | 由降雨诱发的残积土滑坡在亚热带和热带地区非常普遍,产生此类滑坡的主要原因是雨水入渗使斜坡内非饱和区材料抗剪强参数和基质吸力降低导致了土体抗剪强度的减小.基于Mein-Larson模型,用一种近似的显式方法模拟入渗过程,得出了实际入渗率和湿润锋深度随时间变化规律,在此基础上,采用考虑基质吸力的极限平衡方法进行了边坡稳定性分析.计算结果表明实际入渗率在积水之前为降雨强度,之后逐渐减小;湿润锋深度随时间成近似线性变化;边坡安全系数随降雨的入渗而显著下降.
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| 关 键 词： | 降雨入渗 湿润锋 Mein-Larson模型 边坡稳定 |
An Analysis of Stability of Shallow Slopes Considering Rainfall Characteristics |
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| HAN Jin-ming
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XIAO Ming.An Analysis of Stability of Shallow Slopes Considering Rainfall Characteristics[J].China Rural Water and Hydropower,2011(5). |
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| Authors: | HAN Jin-ming XIAO Ming |
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| Institution: | HAN Jin-ming1,2,XIAO Ming1,2(1.State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China,2.Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering,Ministry of Education,China) |
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| Abstract: | The rainfall-induced landslide in residual soil is very common in tropical and subtropical regions.This type of landslide is mainly due to the reduction of anti-shear parameters and matric suction in the unsaturated area of slope caused by rainfall infiltration,thus lowering the anti-shear capacity of soil.Based on Mein-Larson model,an explicit method is presented to approximately simulate the process of infiltration.Variation laws of infiltration rate and depth of the wetting front with time are obtained.O... |
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| Keywords: | rainfall infiltration wetting front Mein-Larson model slope stability |
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