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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。
Unsaturated rainfall infiltration is one of the main causes of instability slips. Based on the saturated-unsaturated rainfall infiltration theory, a saturated-unsaturated rainfall infiltration model is established in this paper, and its numerical calculation model is further established, and the corresponding numerical simulation technology is developed. Based on the previous work, the finite element program of saturated-unsaturated rainfall infiltration has been established and perfected. A typical slope of Jiaocheng earth site in Jiaohe, Xinjiang is selected to analyze the distribution characteristics of seepage field in a more complete rainfall infiltration process. The results show that the established saturated-unsaturated rainfall infiltration model is well described The distribution of seepage field inside the slope during the rainfall provides support for the further analysis of the slope stability under the conditions of unsaturated rainfall infiltration.