The temperature in the eastern coastal areas of China is high in summer,and roller compacted concrete dam projects in such areas often have high temperature intervals during the construction period.Aiming at the current cases of setting high-temperature breaks relying mainly on experiences and lacking relevant quantitative analysis,this article carried out FEM analysis on Huokou Reservoir project to analyze the impact of high-temperature breaks on temperature and stress during the construction period of the roller compacted concrete dam.The results indicate that continuous construction in high temperature period will cause large temperature difference at dam foundation as well as inside and outside of the dam body,and give rise to cracking risks.Compared to continuous construction,setting high-temperature breaks can significantly reduce cracking risks on the surface and interior of the roller compacted concrete dam.However,the concrete poured after resumption of work still needs to be cooled down by water cooling measures to avoid cracking.The results can provide reference for high-temperature breaks in construction period of roller compacted concrete dams.
关键词
碾压混凝土/高温间歇/温控防裂/岸坡坝段/温度应力/霍口水库工程
Key words
roller compacted concrete/high-temperature break/temperature control and crack prevention/bank slope dam section/temperature stress/Huokou Reservoir project
维普
万方数据