紧水滩拱坝坝肩稳定分析与处理的几个问题

紧水滩工程是我国首批建成的百米以上双曲薄拱坝，对坝岩岩体要求较高。分析中采用了三维有限元和刚体平衡法以及坚岩包络线法等。坝肩岩体断裂发育，研究中采用了滑型的组合分析与相应的稳定计算，对坝肩稳定进行了不确定因素的敏感性分析。坝肩岩体处理中确定以保护与强为主的原则，施工简单可靠，效果较明显。

Several problems on abutment stability analysis and treatment of the Jinshuitan arch dam

The Jinshuitan double curvature thin arch is the first of its kind built up in China with a height of over 100m.Such kind of dam needs high quality of dam foundation. For dam analysis the three dimensional finite element method and the rigid equilibrium method as well as the hard rock envelope methed were used.Cracks and fissures are developed in the rock of the dam abutment.In design the abutment stability was examined by sensitivity analysis with undefined factors. In treating the abutment rock a main principle of protection plus strengthening was adopted. Under this principle the construction was easier and dependable,and the effect was obvious.