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对于采用柱状浇筑的混凝土坝,为了保证坝体的相对整体性,要求在纵缝灌浆前将坝体用人工冷却措施强迫降温到稳定温度。但是,根据我国龚咀、刘家峡和美国胡佛、方坦那等大坝的温度实际观测资料查明,施工期采用人工冷却措施的重力坝,初期坝体具有较低的温度,而在运行期逐年升高,趋近于稳定状态;对施工期没有采取人工冷却的坝体或部位,初
For the concrete dams using column pouring, in order to ensure the relative integrity of the dam, it is required that the dam be forced to cool down to a stable temperature by manual cooling before the longitudinal grouting. However, according to the actual observation data of the temperature of dams in Gongzui, Liujiaxia and Hoover, the United States, and that of the United States, the gravity dam with artificial cooling measures during the construction period is used. The initial dam has a lower temperature, and during the operation period Rising year by year, approaching a steady state; on the dam or part of the construction did not take artificial cooling, early