Arch dam temperature control curve adjustment and its impact

With the improvement of intelligent temperature control technology, the “three phases and nine stages” temperature control curve used in the casting of extra-high arch dams also needs to be adjusted according to project requirements. In Baihetan Hydropower Station, the design is 120 days to reach the arch sealing temperature, but in the actual construction sometimes need to shorten or extend the length of time through the water, resulting in the arch dam concrete stress changes, so that the arch dam temperature control anti-cracking increased the difficulty. In this paper, we designed 90 days and 150 days to reach the arch sealing temperature through simulation calculation, and compared it with the standard working conditions. The results found that: shortening or extending the arch sealing temperature by 30 days brings less stress changes to the arch dam concrete, and the arch dam as a whole is in a safe range, and the temperature control curve can be reasonably adjusted according to the actual needs of the project.

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