白莲崖水库碾压混凝土拱坝设计优化总结

摘要

The RCC dam of Baiiianya Reservoir is the first double-curvature arch dam in Anhui Province with a height more than one hundred meters. The dam has a maximum ratio of thickness to length at present in China as it locates at a wider valley. The asymmetry of two river banks and the specific operation mode put forward a higher requirement on dam shape design. In the design of dam, the tensile stress of dam are controlled by optimizing the radius of curvature and the symmetry of arch dam, and selecting reasonable thermal control measures and joints of dam through temperature simulation calculation. According to the analysis of prototype observation, the design optimization of arch dam achieves desired effect and meets the requirements on safety.%白莲崖水库大坝为安徽省第一座百米级碾压混凝土双曲拱坝.因坝址处河谷较宽,坝顶轴线弧线较长,是目前国内弧高比最大的碾压混凝土拱坝.其两岸山体地形不对称,且受工程调度运用方式特殊性的影响,对拱坝体形设计提出了较高的要求.在拱坝体形设计中,通过对拱坝拱圈的曲率半径和拱坝对称性的优化调整,通过温度仿真计算合理确定坝体分缝及温度控制措施,使坝体应力更加趋于合理.根据原型观测成果分析,拱坝优化设计达到了预期的效果,满足安全运行的要求.