CPR1000核电站筏基混凝土连续整体浇筑温度应变监控研究

MONITORING OF TEMPERATURE STRAIN DURING CONTINUOUS POURING CONCRETE OF RAFT FOUNDATION FOR CPR1000 NUCLEAR POWER PLANT

如何有效进行大体积混凝土浇筑裂缝控制,缩小甚至消除裂缝,一直是长期困扰核电建设者的难题,进行有效的温度应变监控是裂缝控制的重要环节。以某CPR1000核电站筏基大体积混凝土浇筑过程中的温度监控为例,应用Ansys软件建立了筏基混凝土整体浇筑的三维有限元数值仿真模型,并制订了行之有效的温度应变监控方案,养护期间依据监控数据及时调整养护措施。拆模后未出现明显裂缝。该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 effective monitoring of temperature strain is a key link to control cracks of pouring a mass concrete.Taking the pouring mass concrete of raft foundation for a CPR1000 nuclear power plant for example,software ANSYS is used to set up a 3-DFE model for pouring the concrete of its foundation.A scheme of monitoring the temperature strain is worked out,and the curing measures are adjusted timely according to the monitoring data during curing period.There are no obvious cracks on the concrete after stripping.Which provides an important basis for crack control of pouring concrete of raft foundations for other nuclear power plant.