考虑硬壳层作用的软土地基加固方式分析

Analysis of the action and reinforcement mode of hard crust layer on soft ground

某市市政道路工程多次发生区域滑坡事故,分析结果认为是工程西侧的不平衡堆载导致桩基发生了侧向位移。再加上该地区淤泥质软土层较深,承载能力较差,从而导致了严重的滑坡事故。为了研究硬壳层在软土地基中的作用和不同加固方式的影响,通过有限差分软件FLAC 3D进行数值模拟分析。结果表明:硬壳层可有效减少土体的位移;在降雨入渗的影响下,硬壳层作用会大幅降低;在软土层中嵌入竹节桩,可有效减少土体的位移。

Regional landslide accidents occurred several times in a city municipal road project,and the analysis results concluded that the unbalanced stockpile load on the west side of the project led to the lateral displacement of the pile foundation.This,coupled with the soft deeper soil layer of silty clay in the area and the poor bearing capacity,led to the serious landslide accidents.In order to research the role of crust layer in soft ground foundation and the effect of different reinforcement methods,numerical simulation analysis was carried out by finite difference software FLAC 3D.The results show that:the crust layer can effectively reduce the displacement of the soil;under the influence of rainfall infiltration,the role of the crust layer will be significantly reduced;embedded in the soft soil layer,nodular pile can effectively reduce the displacement of the soil.