Abstract: For dam built on the deep overburden layer, stress field and seepage field affect each other during the process of filling and impoundment. Stress-seepage coupling should be considered in the FEM in order to obtain exact solution. Taking a core wall dam built on deep overburden as an example, combined with the theory of stress-seepage coupling, the finite element model is established. Through calculation and analysis, the obtained regularity of the deformation and stress of dam and the obtained regularity of the porosity and the osmotic coefficient of overburden layer are worthy of reference.

Key words: overburden layer, core wall dam, seepage field, stress field, analysis

摘要： 在覆盖层上建坝，渗流场与应力场在建坝和蓄水过程中相互影响，为准确分析应力变形，有限元计算中需要考虑其耦合作用。运用渗流场与应力场耦合理论，以某覆盖层上心墙坝为例，建立有限元模型，通过计算分析，得出坝体的变形和应力规律以及覆盖层孔隙率与渗透系数的变化规律，为工程建设与运行提供参考性意见。

关键词: 覆盖层, 心墙坝, 渗流场, 应力场, 分析