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近年来,伴随着极端气候的不断出现,强降雨引发的地质灾害逐渐增多。大气降雨的入渗一方面改变了岩土体的物理力学性质,另一方面,随着降雨的进一步进行和包气带内土中所含水分进一步下渗,大气降雨将补给在相对隔水的滑带处形成的潜水面。论文从渗流基本原理出发,采用稳定渗流情况下的潜水面作为非稳定渗流的初始值,推导出降雨入渗下潜水面的解析解,然后对近似解析解的误差做定量分析,阐述近似解析解在滑坡等地质灾害的潜水位求解过程中的适用性,可用于指导受大气降雨补给潜水面的滑坡浸润线的求解,便于分析大气降雨产生的直接影响。
In recent years, with the continuous emergence of extreme weather, geological disasters caused by heavy rainfall are gradually increasing. Atmospheric rainfall infiltration on the one hand changed the physical and mechanical properties of rock and soil, on the other hand, with the further advance of the rainfall and infiltration of soil moisture in the soil to further infiltration, atmospheric rainfall will be recharged in the relative water Slip surface formed at the diving surface. Based on the basic principle of seepage flow, the submerged surface under steady seepage condition is taken as the initial value of unsteady seepage flow, and the analytical solution of submerged surface under rainfall infiltration is deduced. Then the error of approximate analytical solution is quantitatively analyzed, and the approximate analytical solution The applicability of solving landslide and other geological disasters during the diving process can be used to guide the solution of the landslide saturation line replenished by atmospheric rainfall to facilitate the analysis of the direct effects of atmospheric rainfall.