边坡软式透水管在不同淤塞度下的排水效应数值模拟

Numerical Simulation of Slope Drainage Effect of Soft Permeable Pipe Under Different Fouling Factors

通过结合实际室内边坡试验成果,借助PLAXIS 3D有限元软件建立边坡三维渗流模型,对软式透水管在不同淤塞程度的工况下的排水效应及其对边坡渗流场的影响展开研究。研究结果表明:边坡位移量从坡体内部逐渐向坡面发展演化,在透水管上方的坡面处位移变形量最大;渗流量随着软式透水管累积透水面积的增长而逐渐增加,透水管出水口处的流量最大,随透水管淤塞程度的增加,透水管的导水能力逐渐降低,即边坡坡体与透水管的总渗流量逐渐减少;透水管在较小程度的淤塞情况下仍可发挥部分排水功能,边坡渗流场的地下水位与孔隙水压力值有效降低,不会使坡体产生较大变形量。

Combining the actual indoor slope test results, a three-dimensional seepage model of the slope is established by using PLAXIS 3 D finite element software. The drainage effect of the soft water pipe under different conditions of siltation and its influence on the seepage field of the slope are analyzed. The results show that: the displacement of the slope gradually evolves from the inside of the slope to the slope, and the displacement is the largest at the slope above the permeable pipe;the seepage flow increases with the permeable area of the soft permeable pipe as the growth increases, the flow rate at the outlet of the permeable pipe is the largest, and with the increase of the degree of clogging of the permeable pipe, the water conductivity of the permeable pipe is gradually reduced, which means the total seepage flow of the slope and the permeable pipe is gradually reduced;soft permeable pipe can still exert partial drainage function under a small degree of siltation, and the groundwater level and pore water pressure value of the slope seepage field are effectively reduced, and the slope body will not be greatly deformed.