太平湾大坝过渡区及左岸挡水坝段水平变形差分析

Analysis of the Difference between Horizontal Deformation in the Transition Zone and the Left Bank Dam Section of Taipingwan Dam

针对低温季节太平湾大坝过渡区及左岸挡水坝段出现的变形差问题,以实测位移量为基础,结合坝体结构布置和运行环境等展开研究,初步认为随着挡水坝高度向左岸降低,静水压力逐渐减弱和坝体温度梯度分布发生改变是坝体产生相异变形的两个主要影响因素,但目前坝体尚处于弹性变形范围。该研究成果不仅对指导大坝安全运行具有积极意义,还可为今后进一步深入研究提供思路和技术借鉴。

Aiming at the problem of deformation difference between the transition zone and left bank darn section of Taipingwan dam in low temperature season, we studied the causes based on the measured displacement and operating en- vironment. The preliminary analysis shows that with the dam height decreasing to the left bank, the two main factors af- fecting dam deformation are the gradual decrease of hydrostatic pressure and the change of temperature gradient distribu- tion. But the dam deformation is still in elastic range. The study results not only have positive significance for guiding the dam safety operation, but also provide ideas and technical reference for further research in the future.