Simulation analysis on temperature rise during arch dam construction period

During the construction of a high arch dam, the concrete will have a certain temperature rise after being cooled by the external environment and the concrete’s own hydration. As a high arch dam concrete temperature control stage, the temperature change generated outside the control, the impact on the actual project needs to be analyzed in conjunction with the specific project. This article focuses on the temperature rise phenomenon of an arch dam under construction in China, and analyzes the impact of the temperature rise phenomenon during the current arch dam construction period on the arch dam through monitoring data research and finite element simulation. The results show:(1)The arch dam has obvious temperature rise during the temperature control stage, which mainly occurs when the temperature rises after the cooling temperature is lower than the target temperature of the stage and after the large flow of water is stopped in the temperature control stage, and there is a short-term rise The phenomenon of 3 °C;(2)According to the inversion results of the monitoring of the arch dam, there is a certain safety margin for the concrete stress level of the corresponding parts before and after the temperature rise phenomenon;(3)The temperature rise phenomenon can be controlled at the temperature. During the control period, the tensile stress level of the concrete is prevented from further increasing when the concrete strength is low.

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