关键词: 混凝土浇筑, 温控防裂, 特高拱坝, 锦屏一级水电站

Abstract: At present, Jinping I Hydropower Station dam is the highest concrete double-curvature arch dam in the world. The temperature difference between day and night at the dam site is large and the aggregate property of the concrete materials is not good, which led to higher requirements for concrete temperature control and crack prevention. In this paper, the most stringent temperature control standards are introduced, including concrete pouring temperature control, arch sealing temperature control, temperature gradient control and cooling rate control. Moreover, the layout of sand and gravel processing system, aggregate transport system, concrete production system and cable machine system are described. Relevant experience can be referred to similar projects.

Key words: concrete pouring, temperature control and crack prevention, super-high arch dam, Jinping I Hydropower Station