交河故城土遗址边坡降雨非饱和入渗分析  

The analysis of rainfall unsaturated seepage in a slope

作　　者：王建新[1] 王恩志[1] 王思敬[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《工程勘察》2010年第5期23-25,44,共4页Geotechnical Investigation & Surveying

基　　金：科技部支撑计划课题(2006BAK30B02)

摘　　要：降雨非饱和入渗是诱发边坡失稳滑动的主要原因之一。本文基于饱和-非饱和降雨入渗理论,建立饱和-非饱和降雨入渗模型,并进一步建立了其数值计算模型,发展了相应的数值模拟技术。在前人工作的基础上,编制完善了饱和-非饱和降雨入渗有限元计算程序。选取新疆交河故城土遗址一典型边坡,详细分析了一个较为完整降雨入渗过程中边坡内部渗流场的分布特征;结果表明:所建立的饱和-非饱和降雨入渗模型较好的描述了降雨过程中边坡内部的渗流场分布,为进一步分析边坡在降雨非饱和入渗条件下的稳定性提供了支持。Rainfall unsaturated seepage is a main factor to lead the slope disaster.Bsed on the saturated- unsaturated rainfall infiltration theory,the finite element method of rainfall infiltration is presented in this paper,as well as,some new numerical technologies are developed.It is applied to the calculation of a full rinfall infiltration process,and the results well describe the distribution of seepage field in a Jiaohe slope.The results show that the rainfall saturated-unsaturated seepage model can finely describe the distribution of seepage in the slope,which provides the important basis for the further analysis.

关 键 词：降雨入渗 非饱和渗流 有限元计算 工程应用 

分 类 号：P641.2[天文地球—地质矿产勘探] TU441.33[天文地球—地质学]