Research on risk and measure of temperature control and crack prevention for foundation cushion of dam

Abstract

In this paper, a three-dimensional finite element method was used to analyze the peak value of the foundation cushion of typical section of the Sanhekou dam, and the water cooling and pouring process were accordingly simulated. In order to meet the temperature control standards, three working conditions were analyzed. Results show that the use of refined water pipes and lower pouring temperature can make the maximum temperature of concrete lower than 30 ℃. However, refined water pipes will lead to greater tensile stress at the end of second cooling stage and the strategy of "small temperature difference, slow cooling rate" should be adopted to further reduce the risk of cracking during later age.