| 库水位下降和降雨影响下李家湾滑坡的稳定性计算 |
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| 引用本文： | 周丽,汪洋,杜娟.库水位下降和降雨影响下李家湾滑坡的稳定性计算[J].安全与环境工程,2010,17(3). |
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| 作者姓名： | 周丽 汪洋 杜娟 |
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| 作者单位： | 中国地质大学工程学院,武汉,430074 |
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| 摘 要： | 采用包辛涅斯克(Boussinesq)非稳定渗流微分方程,以巴东李家湾滑坡为例,求解库水位不同降速、不同降雨强度和降雨历时工况下地下水浸润线的位置,并采用传递系数法对各种工况下滑坡的稳定性进行计算,结果表明:在无降雨条件下,滑坡的稳定性随着库水位下降速度的增大逐渐变差;在有降雨条件下,随着降雨强度的增大、降雨持续时间的增长,滑坡的稳定性逐渐变差,尤其是遇到特大暴雨天气或降雨持续3 d以上,有可能发生整体失稳。
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| 关 键 词： | 库水位下降 降雨 浸润线 滑坡稳定性 李家湾滑坡 |
Calculation of Lijiawan Landslide Stability under the Drawdown and Rainfall Conditions |
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| ZHOU Li,WANG Yang,DU Juan.Calculation of Lijiawan Landslide Stability under the Drawdown and Rainfall Conditions[J].Safety and Environmental Engineering,2010,17(3). |
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| Authors: | ZHOU Li WANG Yang DU Juan |
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| Affiliation: | ZHOU Li,WANG Yang,DU Juan(Faculty of Engineering,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | To solve the phreatic line location of soil slope in the combined effects of drawdown and rainfall,based on the Boussinesq's differential equation of unsteady-seepage,this paper takes Lijiawan landslide for example to simulate the phreatic line location in the different conditions of drawdown velocity,rainfall intensity and rainfall duration.Then the paper discusses the landslide stability in every condition using transfer coefficient method.The results show that when it dose not rain,the stability of lands... |
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| Keywords: | drawdown rainfall phreatic line stability of slope Lijiawan landslide |
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