中文摘要：

对于建在深厚覆盖层上的高土石坝,地基防渗墙的应力和变形性状十分复杂。本文以规划设计中的某高心墙堆石坝工程为例,进行了二维有限元应力变形分析,重点探讨地基混凝土防渗墙应力与变形的特点。研究结果表明,对于深厚覆盖层上的高土石坝,坝体覆盖层通常发生较大的变形;覆盖层和防渗墙变形的不协调可导致两者之间发生复杂的相互作用;防渗墙受弯矩作用明显,覆盖层中的局部软弱土层,可使防渗墙体的局部发生较大的应力集中现象。

英文摘要：

For a high core rockfill dam that is built on a thick overburden layer, the stress and deformation distributions of its foundation cut-off walls are very complicated. As an example, a 2D finite element stress- deformation analysis is performed for a planned high core rockfill dam, and the stress-deformation characteristics of the foundation concrete cut-off walls are analyzed. In general, the deformation of the thick overburden layer is relatively large, much larger than that of the cut-off walls. This inconsistency in deformation often leads to complicated interaction between them. Furthermore, the cut-off walls are subjected to apparent bending moment, and the existence of local soft soils in the overburden layer can cause significant stress concentration in certain areas of the cut-off walls.