中文摘要：

提出高拱坝基础承载力对建基面的要求,讨论坝肩与河床基础大垫座及周边缝的工作机制、大垫座及周边缝设置的非线性分析特点以及其与高坝整体稳定的关系。指出大垫座设置对基础刚度的对称性、大坝整体稳定性有显著提高的效应。结合高拱坝（英古里、李家峡拱坝和锦屏I级拱坝）实例,详细讨论高拱坝在基础设置垫座后的安全度及坝踵、坝址应力分布优化情况。拱坝所提出的问题对我国目前的高拱坝建设具有指导意义。

英文摘要：

The detailed discussion on operation mechanism of concrete socket and peripheral joint with dam foundation and relationship between concrete socket and overall stability factors are carried out. The analytical results show that the symmetry of foundation and overall stability of dam increase evidently after employing large concrete socket and other reinforcing measures. By employing finite element analysis, the nonlinear effects for these dams are also given. A research on the effect of concrete socket and peripheral joint for Enguli Arch Dam, Lijiaxia Arch Dam and Jinping I Arch Dam is carried out, taking account of the change of overall stability factor, dam stress distribution and dam deformation etc.. The large sockets for high dams from the analysis are also beneficial to the design and construction of high arch dam projects.