摘要
Abstract
To further improve the accuracy of groundwater exploitation-induced ground deformation simula⁃tion, based on the Biot’s consolidation theory and combined with the nonlinear rheological theory of soil, a three-dimensional full coupling mathematic model was set up,in which the constitutive relation in Biot’s consolidation theory was extended to viscoelastic plasticity,the porosity,permeability coefficient and parame⁃ters of soil deformation dynamic relations with the effective stress were considered,and the Galerkin finite element method was taken to solve the model. On that basis,the groundwater seepage field,ground subsid⁃ence and ground fissures development trend was simulated and forecasted in Cangzhou City, Hebei Prov⁃ince. The results show that when the cone of groundwater depression and land subsidence occurred due to over pumping,the horizontal displacement totally directing to cone of groundwater depression of soil will be caused, and the large value of horizontal displacement is concentrated at the edge of cone of groundwater depression,where is the ground fissure high incidence area.关键词
比奥固结/黏弹塑性/地下水/地面沉降/地裂缝Key words
Biot’s consolidation/viscoelastic plasticity/groundwater/land subsidence/ground fissure分类
天文与地球科学
