| On the southwest mountain city, urbanization and land conflicts have become increasingly prominent, while the high embankment has become one of the most effective ways to solve the construction.The rainfall infiltration has a significant effect on the slope seepage field distribution,so rainfall infiltration is the main reason to hill-fill slope instability. In this paper, combined with a fill slope in Yudong Chongqing,characteristics of seepage,deformation and stability of the slope under the condition of rainfall are analyzed and studied by using the finite element software,through the method of simplifing the region into two dimensions,based on the theory of saturated unsaturated seepage and method of slope stability analysis. Reliable conclusions are gotted after the safety factor of the slope after rain is analied with the regression analysis,combined with the rainfall infiltration depth and the the saturated area under bottom of the slope, and prediction and evaluation of settlement is got combined with the measured data. The main contents is as followed:①First, using the SEEP/W finite element software to analysis high-fill slope rainfall infiltration process and the change of seepage field,including:the development process of the transient saturated zone;the change of the pore water pressure and volumetric water content;the discussion under different rainfall types.②Under the theory of unsaturated soil slope stability,the deformation and stability of embankment slope is analyzed combination the pore water pressure of the rainfall process. At the same time, compare the stability factors of sensitivity, which provides reference for similar engineering design and construction of high embankment.③Using regression equation to forecast the settlement of slope,and it’s based on the measured settlement data of the fill slope. At the same time, set up the safety coefficient of regression equation according to the depth of rainfall infiltration and the bottom of the slope. |
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