CAJ | 학술논문

为进一步提高地下水开采诱发地面变形模拟的准确性,以比奥固结理论为基础,结合土体非线性流变理论,将比奥固结理论中的本构关系推广到黏弹塑性,并考虑孔隙度、渗透系数、土体的变形参数随有效应力的动态变化关系,建立了地下水开采与地面沉降三维全耦合数学模型,并应用伽辽金有限单元法对模型进行求解,模拟了河北省沧州市地下水开采引起的地下水渗流场、地面沉降、地裂缝发生发展趋势.结果表明:抽水引起地下水位降落漏斗和地面沉降的同时,将导致土体发生总体指向地下水位降落漏斗中心的水平位移,水平位移较大的地区集中分布在地面沉降漏斗的边缘,是地裂缝的高发区.
위진일보제고지하수개채유발지면변형모의적준학성,이비오고결이론위기출,결합토체비선성류변이론,장비오고결이론중적본구관계추엄도점탄소성,병고필공극도、삼투계수、토체적변형삼수수유효응력적동태변화관계,건립료지하수개채여지면침강삼유전우합수학모형,병응용가료금유한단원법대모형진행구해,모의료하북성창주시지하수개채인기적지하수삼류장、지면침강、지렬봉발생발전추세.결과표명:추수인기지하수위강락루두화지면침강적동시,장도치토체발생총체지향지하수위강락루두중심적수평위이,수평위이교대적지구집중분포재지면침강루두적변연,시지렬봉적고발구.
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.