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全面介绍了瑞士Les Toules拱坝的加固情况。该拱坝为高86m的双曲拱坝,拱坝体形较一般拱坝更为修长。自1964年大坝首次蓄水以来,通过连续监测和观测,发现了一些大坝在长期运行过程中的问题。2003年,负责瑞士大坝安全的瑞士联邦能源办公室(SFOE)出台了抗震相关规范的升级本,要求大坝的业主重新对结构的安全性进行评估。在这种情况下,启动了Les Toules拱坝的加固项目,开展了对老坝结构和运行性状的综合研究。经过对老坝的静力和动力分析,对各种加固方案进行比选,最终的解决方案为在下游处对坝肩进行一种独特的加固、将悬臂梁超负荷的荷载转移到加厚的拱上、在垂直缝上设置剪力键、局部地基处理和其他一些辅助的修复工程。
An overview of the reinforcement of the Les Toules arch dam in Switzerland. The arch dam is a hyperbolic arch dam of 86m in height, and the shape of the arch dam is more slender than that of an ordinary arch dam. Since the first impoundment of the dam in 1964, through continuous monitoring and observation, some problems in the long-term operation of the dam have been discovered. In 2003, the Swiss Federal Office of Energy (SFOE), responsible for the safety of the Swiss dam, introduced an upgraded version of the seismic-related code that required the dam’s owner to reassess the safety of the structure. In this case, the reinforcement project at the Les Toules arch dam was started and a comprehensive study of the structure and operating characteristics of the old dam was carried out. After the static and dynamic analysis of the old dam, a variety of reinforcement programs were selected, the ultimate solution for the downstream dam abutment a unique reinforcement, the cantilever overload load transfer to thickened Arch, set in the vertical slit shear key, partial foundation treatment and other auxiliary repair works.