排水管堵塞引发路基边坡曲面式沉陷模拟分析

以某高速公路斜坡地段红层填料路基因排水管堵塞引起路基边坡发生曲面式沉陷为背景,借助数值模拟软件分析不同因素变化对路基三维渗流场及破坏范围的影响,并提出此类路基病害的防治方法.研究结果表明:三维渗流场在平面投影图上呈"扇形"分布,在空间上呈现为靠近排水管处位置较高、远离排水管处位置较低,边坡呈曲面式沉陷破坏;管内水头越高...

Simulation Analysis of the Curved Surface Subsidence of Subgrade Side SlopeCaused by the Blockage of the Drainage Pipe

Based on the curved surface subsidence of the subgrade slope caused by the blockage of the drainage pipe of the red layer filler subgrade in the slope area of an expressway, the numerical simulation software is used to analyze the influence of different factors on the three-dimensional seepage field and three-dimensional damage range of subgrade, and the prevention methods for such subgrade diseases are proposed. The result shows that the three-dimensional seepage field is distributed in a "fan shape" on the plane projection map, and it appears to be higher near the drainage pipe and lower far away from the drainage pipe, and the slope shows the curved surface subsidence failure. The higher the water head in the pipeline and the closer the blockage is to the side slope of the subgrade, the larger the "fan" opening angle of the seepage field, the smaller the vertical damage range of the subgrade slope, and the more obvious the reduction of the safety factor of the subgrade. But its influence weight: the height of the water head in the pipe＞the position of the blockage. The pressure grouting method can effectively prevent such diseases.