水利水电技术2017，Vol.48Issue(12)：45-49,5.DOI:10.13928/j.cnki.wrahe.2017.12.008
水闸混凝土结构关键部位温控防裂研究
Study on temperature control and crack prevention for key positions on concrete structure of sluice
摘要
Abstract
As the structure of the bottom slab of sluice belongs to thin plate structure with a thinner thickness,while the internal temperature of its concrete presents a cyclic change along with the annual temperature without a constant value,certain difficulty is brought to making the control standard for its maximum temperature.By taking a sluice as the study case,the temperature control standard for the maximum temperature of sluice structure and both the major points of the crack prevention and the anti-crack ing measures for its key positions are emphatically analyzed herein with the method of finite element simulative analysis.Through the relevant calculation,it is known that the maximum temperature standard for the concrete of the sluice is appropriated to be controlled with the temperature of 32 ℃.During the lower temperature season,the tensile stress therein can be lowered by 19％ through the timely insulation,while the temperature difference between the upper and the lower layers can be controlled by 15 ℃ with the safety factor of 1.65.The result shows that the maximum temperature control standard for the sluice structure is appropriate to be determined in accordance with that the basic temperature difference plus the lowest value of the next year temperature of each concrete placing layer for the bottom slab of the sluice.The timely insulation must be made after the concrete placement in the lower temperature season,furthermore,the control of the temperature difference between the upper and lower concrete layers of both the pier and bottom slab is one of the major points of the crack prevention of the pier structure,thus must be strictly controlled.关键词
水闸结构/温控标准/最高温度/基础温差/上下层温差Key words
sluice structure/temperature control standard/the highest temperature/basic temperature difference/temperature difference between upper and lower layers分类
建筑与水利引用本文复制引用
李松辉,李玥,孙祥鹏..水闸混凝土结构关键部位温控防裂研究[J].水利水电技术,2017,48(12):45-49,5.基金项目
国家重点研发计划资助(2016YFB0201003) （2016YFB0201003）
国家自然科学基金项目(51579252) （51579252）
水利部技术示范专项(SF-201701) （SF-201701）
中国水科院科研人才专项(SS0145B932017) （SS0145B932017）
