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高温高湿环境给核电站核岛筏基混凝土整浇和养护带来诸多困难,尤其是易导致混凝土中心温度过高,内外温差过大,不利于裂缝控制。以某核电站核岛筏基在高温高湿环境下的混凝土浇筑的温度应变监控数据为基础,结合三维有限元数值仿真模型的理论分析结果,对养护期间的混凝土裂缝控制进行深入分析。经有效温度应变监控养护的该筏基混凝土拆模后未出现明显裂缝。此方法为其他核电站筏基混凝土浇筑裂缝控制提供了重要参考依据。
The high temperature and high humidity environment brings many difficulties to the nuclear pouring and curing of the nuclear island raft concrete in nuclear power plant. In particular, it is easy to cause the temperature of concrete center to be too high and the temperature difference between inside and outside is too large, which is unfavorable to crack control. Based on the temperature and strain monitoring data of concrete pouring of a nuclear power plant nuclear island raft in high temperature and high humidity environment and in combination with the theoretical analysis results of three-dimensional finite element numerical simulation model, the concrete crack control during curing is analyzed in depth. The rammed concrete, which has been cured by effective temperature and strain monitoring, did not show obvious cracks after it was disassembled. This method provides an important reference for the control of pouring cracks of raft concrete in other nuclear power stations.