关键词: 混凝土温控, 温控防裂, 质量管理, 锦屏一级水电站

Abstract: The 305m high concrete double curvature arch dam of Jinping I Hydropower Station is the highest one in the world. The key to quality control of dam construction is temperature control and crack prevention. Due to the inherent deficiency of the raw material, the complex dam structure, the small number of monoliths with large bottom width, and the dry and windy weather in winter, the temperature control management is highly challenging, which is compounded by the fact that temperature control requirements for super high arch dam are more strict than the current specifications and the temperature control is interfered by concrete construction at the dam site. To address the challenges, a temperature control management organization was established, a temperature control management system was formulated, a complete temperature control evaluation system was built, and an automatic temperature control system was developed and applied, realizing professional, accurate and intelligent management for temperature control. The application shows that the main parameters' qualification rate are above 95% and no temperature-induced cracks are found in the dam, which facilitates the efficient construction of the high quality super high arch dam.

Key words: concrete temperature control, temperature control and crack prevention, quality management, Jinping I Hydropower Station