严寒地区混凝土拱坝浇筑期间温控措施及监测方法

Temperature control measures and monitoring methods during concrete arch dam pouring in cold region

混凝土拱坝坝体较单薄,对外界气温和水温变化比较敏感,尤其是严寒地区气温年差较悬殊,温度应力对拱坝安全的影响使得大坝温度控制成为关键。为研究严寒地区混凝土拱坝浇筑期间温度控制及温控效果,本文介绍了山口水电站混凝土拱坝温度控制措施和温度监测布置情况,并结合温度监测数据对温控效果进行了分析。结果表明:该拱坝温度控制措施较为合理,温度监测数据变化规律总体符合设计及规范要求,拱坝整体温控效果较好。

The concrete arch dam is thin and sensitive to external temperature and water temperature changes,especially in cold regions with large annual temperature difference.The influence of temperature stress on the safety of the arch dam makes the temperature control of the dam become the key.The temperature control measures and temperature monitoring layout of the concrete arch dam in Shankou Hydropower Station are introduced in the paper,and the temperature control effect is analyzed based on temperature monitoring data in order to study the temperature control and temperature control effect of concrete arch dam during pouring period in the cold regions.The results show that the temperature control measures of the arch dam are reasonable,and the change law of temperature monitoring data generally conforms to the design and specification requirements.The overall temperature control effect of the arch dam is excellent.