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| 降雨条件下非饱和土坡稳定性数值模拟 | |
| 引用本文： | 张晓莹,张 琦,狄军贞.降雨条件下非饱和土坡稳定性数值模拟[J].水资源与水工程学报,2012,23(2):83-85,89. |
| 作者姓名： | 张晓莹 张 琦 狄军贞 |
| 作者单位： | 1. 辽宁工程技术大学理学院,辽宁阜新,123000 2. 河南正商置业有限公司,河南郑州,450052 3. 辽宁工程技术大学建筑工程学院,辽宁阜新,123000 |
| 基金项目： | 辽宁省博士科研启动基金项目(20101046)资助 |
| 摘 要： | 为了研究非饱和土坡在降雨入渗条件下的稳定性,运用饱和—非饱和渗流有限元法模拟降雨条件下饱和—非饱和土坡暂态渗流场的变化情况,分析了降雨强度、降雨持时以及土壤饱和渗透系数等参数对非饱和土坡稳定性的影响。分析结果表明:土坡的安全系数随降雨强度的增大而增大,随饱和渗透系数的增大而减小。由于降雨的进行,雨水入渗量逐渐增加,基质吸力逐渐丧失,孔隙水压力逐渐增大,因而土坡的安全系数随降雨持时的增加而减小。 |
| 关 键 词： | 降雨 土坡稳定性 渗流 安全系数 |
| 收稿时间： | 2011/9/20 0:00:00 |
| 修稿时间： | 2011/11/14 0:00:00 |
Stability simulation of unsaturated land slope under rainfall condition |
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| ZHANG Xiaoying,ZHANG Qi and DI Junzhen.Stability simulation of unsaturated land slope under rainfall condition[J].Journal of water resources and water engineering,2012,23(2):83-85,89. | |
| Authors: | ZHANG Xiaoying ZHANG Qi and DI Junzhen |
| Affiliation: | 1b(1a.College of Science,1b.College of Architecture Engineering,Liaoning Technical University,Fuxin 123000,China; 2.Henan’s Business Properties Limited,Zhengzhou 450052,China) |
| Abstract: | In order to study the stability of unsaturated land slope under rainfall infiltration condition,using the finite element method of the saturated-unsaturated seepage,the paper simulated the saturated-unsaturated transient seepage field under the condition of rainfall,and analyzed the influence of rainfall intensity,rainfall duration and saturated permeability coefficient on the stability of the unsaturated land slope.The results indicate that the slope safety coefficient is increased with the increase of rainfall intensity,and decreased with the increase of saturated coefficient.Because it is raining,rainfall infiltration quantity was increasing,matrix suction was losing gradually,pore water pressure is increasing gradually,thus land slope safety coefficient is decreased with the increase of raining time. |
| Keywords: | rainfall land slope stability seepage safety coefficient |
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