混凝土大坝加高施工关键技术研究

以国内外混凝土坝加高工程施工实践为基础，系统总结混凝土重力坝后帮整体式加高施工中的四项关键技术，即混凝土原材料及配合比、新老混凝土结合、原有结构体的控制拆除与转移、施工期资源的时间与空间调配。针对其中的每一项关键技术，分析了其施工技术难点与特点、施工技术要求，并总结了其技术措施和解决策略，以期为同类型工程建设提供参考与借鉴。

Research on key construction technologies of concrete dam heightening project

Based on construction practice of worldwide concrete dam heightening project, four key construction technologies of concrete gravity dam heightening project by the integral heightening mode on the existing dam by the down stream side and on the dam crest are systematically summarized. Namely, concrete raw materials and mix proportion, jointing between new concrete and existing concrete, controlled demolition and transportation of old structures, and construction resources temporal and spatial allocation during construction period. For each key construction technology, the construction technical difficulties, features and requirements are analyzed, and the technical measures and solving strategies are summarized. They are hoped to provide construction references for same type projects in the future.