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针对工程降水会给周边环境带来风险的问题,忽略降水工程的群井效应,基于裘布依假设求出基坑降水后地下水位的降落漏斗曲线方程.考虑到降水产生的附加应力在水平方向存在分量,采用分层总和法分别计算水位降落曲线上下疏干土与饱和土的地面沉降量,叠加后得到最终坑周地表的沉降量.结合数值计算及工程实例监测数据进行对比分析,表明改进算法比规范算法更接近实际,能够较准确地预测计算不同降深下由工程降水引发的周边不同距离的地表沉降量.
Aiming at the problem that the project precipitation will bring the risk to the surrounding environment, ignoring the well group effect of the precipitation project, the equation of the falling funnel of the groundwater table after the foundation pit precipitation is obtained based on the cloth hypothesis. Considering the existence of additional stress in the horizontal direction Component, the stratified sum method was used to calculate the ground subsidence of the upper and lower drainage soil and the saturated soil respectively, and the settlement of the surface of the final pit was obtained by the superposition method.Comparison between the numerical calculation and the project monitoring data shows that the improved algorithm Which is more realistic than the normalized algorithm and can accurately predict and calculate the ground settlement of different distances around different distances caused by engineering precipitation under different depths.