Research on temperature control and crack prevention measures in strong confinement area of overflow dam section of gravity dam poured in high temperature season

The strong constraint area of the overflow dam section of gravity dam has a long dimension along the river. There are many material partitions in this part, and the material properties are not the same. Sometimes, it has to be arranged to pour this part in the high temperature season, and the pouring temperature is high, leading to the difficulty of temperature control and crack prevention. In order to solve the above problems, taking Raochuan gravity dam in Dongyang City as an example, using the three-dimensional finite element calculation program of the temperature field and stress field of concrete with the equivalent cooling simulation algorithm, the concrete in the strong confinement zone of the overflow dam section of the gravity dam was simulated from the construction period to the operation period, and the possible cracks in the area were analyzed and predicted. The results show that the stress of concrete in high temperature environment can be effectively controlled and the crack prevention requirements can be met by adopting the corresponding measures of pouring block optimization and water pipe cooling for each pouring layer in the strong confinement area.