关键词: 老坝加高, 面板堆石坝, 防渗墙, 结构分析, 趾板

Abstract: Concrete face rockfill dam is adopted for thickening and heightening the existing clay core dam in the Zhushou reservoir dam heightening project. The heighten height is 38.4 m, total height after heightening is 98.1 m, which is the largest scale among the similar projects at home and abroad. This paper briefly introduces the type selection of impervious structure, dam structure design and connection between new and old dam body in the dam heightening project. Using the parameters got from field in-situ test, the stress and strain status of the dam under construction condition, running condition and earthquake condition are studied. Study result shows that the dam structure, especially the impervious structure's stress and strain is in the bearing range of materials, and the requirement of dam safety is met. Due to the dam filling construction, the settlement difference of toe slab in riverbed section is large. Therefore, four schemes are planned. By comparison, the optimal plan suitable for the project is carried out.

Key words: dam heightening, concrete face rockfill dam, cutoff wall, structural analysis, toe slab