水利水电技术（中英文）2024，Vol.55Issue(4)：71-80,10.DOI:10.13928/j.cnki.wrahe.2024.04.007
高海拔地区高拱坝首仓混凝土温度反演分析与温控措施优化
Inversion analysis and optimization of temperature control measures for the concrete first placement layer of high arch dams in high altitude regions
摘要
Abstract
[Objective]The pouring of concrete in the first layer of each dam section often uses a large amount of three graded con-crete,which has a high insulation temperature rise.At the same time,this area is greatly constrained by the foundation,and in the event of temperature control measures failure,the temperature peak is prone to exceed the design allowable value,resultsing in sig-nificant stress.To ensure the safety of the dam,it is necessary to adopt reasonable secondary cooling measures to control the tem-perature stress of the dam.[Methods]This paper analyzes the reasons for the excessive temperature and stress formation of the con-crete in the first layer of the dam in high cold and high altitude areas,and analyzes the maximum stress and safety factor of the dam after the temperature exceeds the standard.On this basis,optimization analysis is conducted on the second phase cooling.Taking the Yebatan Project as an example,the measures include setting up the first and second simultaneous-cooling areas for simultaneous cooling,temporarily controlling the temperature of the 16-1 warehouse to 12.50 ℃,keeping the temperature of the first layer 2.00 ℃ higher than the other layers in the first and second simultaneous-cooling areas,and setting the target temperature for the second phase cooling of the first layer concrete to 11.00 ℃(the upper limit value specified in the design).[Results]According to the calculation result,reasonable temperature control measures can increase the safety factor of the dam body from 1.25(in the most unfavorable situation)to 1.63.[Conclusion]This measure can effectively avoid cracks in the concrete of the first warehouse of the dam,and can also provide temperature control measures for similar situations in similar projects.关键词
混凝土坝/混凝土温度超标/温度控制/温控措施优化/变形/混凝土Key words
concrete dam/concrete excessive temperature/temperature control/optimization of temperature control measures/deformation/concrete分类
水利科学引用本文复制引用
夏勇,刘毅,齐问坛,张磊,李建武,盛志刚,刘露,刘伟,朱振泱..高海拔地区高拱坝首仓混凝土温度反演分析与温控措施优化[J].水利水电技术（中英文）,2024,55(4):71-80,10.基金项目
国家重点研发计划项目(2018YFC0406703) （2018YFC0406703）
中国地震局教师科研基金(20110104) （20110104）
