杨映,景霞娟,朱振泱

• 1:中国华电集团有限公司战略规划部
• 2:浙江省水利水电技术咨询中心
• 3:中国水利水电科学研究院水电可持续发展研究中心

摘要(Abstract)：

高寒地区由于年平均温度较低等原因,强约束区域混凝土温度峰值过高时容易开裂,因此高寒地区混凝土坝强约束区在低温季节或在高温季节浇筑需采取严格的浇筑温度控制措施以控制浇筑温度峰值。一些情况下混凝土浇筑过程中可能出现温度峰值没有得到较好控制的情况,这些坝体或坝块在运行期间的温控防裂问题需要深入研究。为此,以西部高寒地区某大型水电工程为例,采用有限元分析和监测数据进行坝体温度场重构和应力场分析,并对温度应力规律进行总结和分析,研究混凝土坝强约束区在浇筑温度难以得到控制情况下的温控防裂措施。结果表明,在浇筑温度明显超标的情况下,浇筑初期和越冬季节采取严格的保温措施和在蓄水前采取有效的裂缝修复措施,可以有效地防止运行期温度裂缝的产生和扩展。通过采用以上温控措施后,该坝顺利通过了蓄水验收并成功蓄水,没有出现温度裂缝的发生和进一步扩展和渗漏情况。研究成果可为高寒地区混凝土温控防裂提供指导。

关键词(KeyWords)： 高寒地区;混凝土;温度峰值;开裂;温控措施

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2018YFC0406703);; 国家自然科学基金资助项目(51779277);; 中国水科院科研专项(SS0145B712017,SS0145B612017,SS0145B392016);; 流域水循环模拟与调控国家重点实验室资助项目(SKL2020ZY10,SS0112B102016)

作者(Author): 杨映,景霞娟,朱振泱

DOI: 10.13928/j.cnki.wrahe.2021.08.003

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