摘要
为满足叶巴滩水电站2025年底首台机组投产发电的建设目标,大坝混凝土浇筑及接缝灌浆等工期较紧张,坝体需采取冬季不停歇施工、采用4.5 m层厚浇筑方案。结合工程实际和计算分析,提出冬季连续施工和大坝浇筑4.5 m层厚方案采用的温控措施并投入运用,研究确定了大坝快速上升带来的三大高差控制指标等高寒高海拨地区大坝混凝土温度控制的关键技术问题。自拱坝坝体2022年冬季混凝土浇筑以来,采取的各项坝体温度控制措施总体效果良好,2025年10月水库初期蓄水前检查未发现坝体混凝土裂缝等质量缺陷。
To meet the construction target of commissioning the first unit of Yebatan Hydropower Station by the end of 2025,the construction period of concrete placement and joint grouting of the arch dam is notably constrained.Consequently,the dam needs to implement continuous winter construction and utilize a 4.5-meter-thick concrete placement layer scheme.Based on actual project conditions and calculation analysis,the temperature control measures for winter continuous construction and the 4.5-meter-thick layer dam concrete placement are proposed.Key technical issues related to concrete temperature control in high-cold and high-altitude areas are investigated and determined,including the three primary elevation difference control indicators resulting from the rapid rise of the dam.Since the start of concrete placement for the arch dam in the winter of 2022,various temperature control measures taken for the dam body concrete placement have generally achieved a good effect.No quality defects such as concrete cracks in dam body are found during the inspection before the initial impoundment of the reservoir in October 2025.
作者
冯海波
康雄
喻葭临
夏勇
FENG Haibo;KANG Xiong;YU Jialin;XIA Yong(China Renewable Energy Engineering Institute,Beijing 100120,China;Huadian Jinsha River Upstream Hydropower Development Co.,Ltd.,Chengdu 610015,Sichuan,China)
出处
《水力发电》
2026年第4期69-72,121,共5页
Water Power
关键词
混凝土
温度控制
高寒高海拔
坝体高差
悬臂高度
叶巴滩水电站
concrete
temperature control
high-cold and high-altitude
dam body elevation differences
cantilever height
Yebatan Hydropower Station
