果多水电站大坝碾压混凝土温控防裂措施

Temperature Control and Crack Prevention Measures of RCC Dam of Guoduo Hydropower Station

西藏果多水电站地处高海拔、寒冷地区。结合坝址区年、日温差较大的水文气象特点和施工条件,介绍了大坝碾压混凝土的温控标准和采用的具体温控防裂措施。实践结果表明,要预防或减少裂缝的发生,需采取"控温+保温"相结合的综合温控措施。通过监测资料的统计分析,大坝碾压混凝土温控工作基本取得了预期成效,施工至今未发现危害性的温度裂缝。

Guoduo Hydropower Station is located in the high-altitude and cold area. Combined with the largetemperaturedifference hydrological and meteorological characteristics and construction conditions in the dam-sitearea, temperature control standard and crack prevention measures of Dam RCC are introduced in this paper. Thepractical result shows that comprehensive temperature control measures, i.e. temperature control ＋ heat insulation,are necessary to prevent or reduce cracks. Judging from the statistical analysis of monitoring data, temperaturecontrol works of RCC Dam have achieved expected results, and hazardous temperature cracks have not beenfound since construction.