一、前言不限于原子能发电站、长跨桥和水坝等大体积混凝土,凡是壁厚在0.5 m以上受约束大的混凝土建筑物,都容易产生水化热所引起的温度裂缝.大体积混凝土早期内部温升,不可能提高后期强度,且往往不能保证达到所规定的质量.因此在大体积混凝土施工时,都采取各种温控措施,其中对混凝土的预冷是一种最有效的措施. First, the preamble is not limited to large-volume concrete such as nuclear power plants, long-span bridges and dams, any temperature cracks caused by hydration heat are easily generated in concrete structures with a wall thickness greater than 0.5 m and large confinement. Internal temperature rise, it is impossible to improve the late strength, and often can not guarantee to achieve the required quality.Therefore, in the mass concrete construction, have taken all kinds of temperature control measures, of which the concrete precooling is one of the most effective measures.