The Impact Analysis Of Rainfall On Slope Seepage Field And Stability

Large-scale infrastructure construction in China will involve a lot of slope, Rainfall is a major cause of instability and failure of slope. Therefore, the influence of rainfallseepage slope internal changes, rainfall led to failure on the slope is very necessary. Ba-sed on the Ren Hua to Bo Luo highway slope K396+320 as the engineering background, the saturated unsaturated seepage theory, the characteristics of seepage field numeri-cal analysis, the numerical analysis of slope stability, Exploration of rainfall on the slope seepage and stability of slope and the impact of technical measures to improve the stability of the measures. The specific studies are as follows:(1)Research status of slope seepage field and slope stability. According to the literature research, many scholars have carried on the theoretical research in the slope seepage field and the stability under the rainfall effect, some use ANSYS, Geo-studio and so on the finite element software to carry on the simulation analysis. However, few schol-ars use Geo-studio software in the slope to join the drainage holes, anchor for simula-tion analysis, I will study in this area.(2)The saturated unsaturated seepage theory and summarized the basis. Based on Darcy’s law and the law of conservation of energy, summarizes the saturated unsaturated seepa-ge differential equation and transient saturated unsaturated differential equations with boundary conditions, the finite element model for numerical simulation of foundation.(3)The use of numerical simulation analysis on the variation characteristics of slope see page under rainfall condition. In this paper, the SEEP/W module by using two dimensi-onal finite element software Geo-studio, the volume of water on the slope under rainfall condition, the rate of change of pore water pressure during the process of a comprehensive calculation, and the effects of different rainfall intensity, rainfall duration, there is no different, different position a drain. hole leakage holes on change law of slope seepage field.(4)The results and the unsaturated shear strength theory combined with the finite elemen-t calculation of seepage. First of all, The seepage field data into the SLOPE/W module SEEP/W module calculated by 2D finite element software Geo-studio geotech-nical finite element software, combined with the limit equilibrium method to study dynamicstability of slope during rainfall change.Secondly, Study on stability of slope with diffe-rent position of influence of drain holes on the slope, and the horizontal comparison of the stability of the slope va-riation in different position of the drainage holes.Finally,Research on influence of different position of slope stability of slope with anchor bolt,and the change law of slope stability in different position of the horizontal comparison.