开采地下水地面沉降三维数值模拟分析

Analysis on land subsidence induced by exploitation groundwater with three-dimensional numerical simulation

根据汉口新业大厦水文地质与工程地质条件,建立开采地下水非稳定流定解问题三维数学模型,利用现有承压含水层非稳定流定解问题数值方案求解,重点讨论了源汇项的具体数学表达式。又简介根据达西定律和水均衡原理,建立了三维有限差分数值方程及其解法。根据土的有效应力原理和压密原理推导出了抽水沉降非线性压密方程,并研制了相应的三维有限元和有限差分计算程序。最后,对该环境岩土工程问题进行了分析和评价,计算结果与实测结果符合较好。

Three-dimensional mathematic model, which is about unsteady flow of groundwater exploitation, is built according to the conditions of hydrogeology and engineering geology of Xin Ye mansion in Hankou, the existed numerical equation of three-dimensional unsteady flow of confined aquifer is used to solve it, concrete numerical formulae of source-sink are emphatically discussed.It is briefly introduced that three-dimensional finite difference numerical equation is built according to Darcy s law and water equili...