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| 非饱和渗流作用下云阳西城滑坡稳定性分析 | |
| 引用本文： | 宋文平,邹文翰,伏维松.非饱和渗流作用下云阳西城滑坡稳定性分析[J].防灾科技学院学报,2010,12(4). |
| 作者姓名： | 宋文平 邹文翰 伏维松 |
| 作者单位： | 1. 成都理工大学环工学院,四川,成都,610059 2. 西南铁路房屋建筑公司,四川,成都,610081 3. 四川兴达彩钢结构建设工程有限公司,四川,成都,610041 |
| 基金项目： | 三峡库区三期地质灾害防治监测预警工程 |
| 摘 要： | 基于非饱和土理论采用有限元法模拟了云阳西城滑坡在雨水入渗和库水位下降过程中暂态渗流场的变化,然后将计算得到的暂态孔隙水压力分布用于滑坡稳定性的极限平衡分析。同时,采用延伸的摩尔—库伦破坏准则以便考虑基质吸力对抗剪强度的贡献,计算了暴雨工况和库水位下降工况下的稳定性系数。研究结果表明:降雨引起的暂态渗流场对滑坡稳定性有明显的影响;考虑基质吸力对抗剪强度的贡献,会明显提高滑坡稳定性;由于该滑坡渗透系数较大,库水位下降引起的暂态渗流场对该滑坡稳定性系数的影响不如降雨引起暂态渗流场的明显;该滑坡主要受暴雨影响。 |
| 关 键 词： | 滑坡 非饱和土渗流 稳定性 有限元分析 基质吸力 |
Unsaturated Seepage and Stability Analysis on Yunyangxicheng Landslide |
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| Song Wenping,Zou Wenhan,Fu Weisong.Unsaturated Seepage and Stability Analysis on Yunyangxicheng Landslide[J].Journal of Institute of Disaster-prevention Science and Technology,2010,12(4). | |
| Authors: | Song Wenping Zou Wenhan Fu Weisong |
| Institution: | Song Wenping1,Zou Wenhan2,Fu Weisong3(1.Department of Civil and Environment Engineering,Chengdu University of Technology,Chengdu 610059,2.Southwest Railway Company of Housing Construction,Chengdu 610081,3.Sichuan Xingda Color-steel Structure Construction Co.,Ltd 610041) |
| Abstract: | In the case of Yunyangxicheng landslide,limited equilibrium method is applied to modeling the transient seepage field induced by rainfall and reservoir water level drawdown,based on the theory of unsaturated soil.Then the transient pore water pressure gained is included in the limited equilibrium analysis on stability.The factor of stability under rainfall and reservoir water level drawdown is figured out in terms of the modified Mohr-Coulomb failure criteria,which takes the contribution of matric suction t... |
| Keywords: | landslide transient seepage in unsaturated soil slope stability finite elements analysis matric suction |
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