摘要
基坑降水在基坑施工中起着重要作用,但降水会对周围环境造成不利影响,譬如引起地面沉降现象。以上海地区某现场抽水试验为例,应用有限元分析软件Abaqus,建立三维地面沉降模型,将土体应力应变与渗流进行耦合,进行有限元计算,分析了抽水过程中孔隙压力的变化以及沉降的分布。数值模拟结果表明,抽水引起的竖向位移明显大于水平位移,最大竖向位移并非发生于地表,各个土层压缩或拉伸的变形状态也不一样。
Dewatering engineering takes an important role in foundation pits construction, while it brings negative effects to the surrounding area, such as land subsidence. A single-well pumping test in Shanghai is taken as an example,FEM software Abaqus is used to simulate 3D dewatering case, and the interactions of stress-strain-seepage are coupled in the calculation. On the basis of the nu- merical results, the change of the pore pressure and the distribution of the subsidence are analyzed in the process of pumping. The numerical results illustrate that the vertical displacement caused by pumping is much larger than the horizontal displacement, the maximum displacement is not on the surface of the land, different layers are under different deformation states.
出处
《江西科学》
2012年第5期658-661,共4页
Jiangxi Science
