高碾压混凝土重力坝施工度汛缺口坝段温控防裂措施研究

Study on temperature control and anti-cracking measure on dam section of flood-discharge gap during construction of high RCC gravity dam

以某碾压混凝土重力坝施工为例,采用有限元仿真的计算方法,就其度汛缺口过流坝段的温控防裂措施进行了详细分析。研究表明:缺口坝段过流前,采用仓面通河水流水养护并加上混凝土过流前中期冷却至一定温度是减小温差的有效措施,可在一定程度上防止裂缝的产生。这为今后碾压混凝土重力坝工程的建设提供一定的参考。

By taking the construction of a RCC gravity dam as the study case, a detailed analysis is made on the temperature control and anti-cracking measure for its dam section of the flood discharge gap. The study shows that curing the concrete placing face directly with the river water before the flood discharge and cooling the concrete to a certain temperature at the mid-term be- fore the discharge is an effective measure to decrease the relevant temperature difference; which can prevent the concrete cracking to a certain extent, and then provides a certain reference for the construction of RCC gravity dam in the days to come.