杨房沟水电站拱坝体形多目标优化设计

在充分认识杨房沟坝址地形、地质条件和工程特点,吸收前阶段研究成果和历次审查咨询会议意见的基础上,在总承包合同相关条款的约束下,采用多种计算分析手段和方法,对杨房沟拱坝建基面及体形开展了多目标优化设计研究工作。在优化设计工作中,从安全性、稳定性、经济性等三方面进行了定量和定性综合分析评价。分析结果表明:优化方案能充分利用坝基岩体条件,减小拱坝所承受的水推力,充分发挥混凝土优良的抗压性能,减小主要工况高拉应力值及其分布范围,进一步提高了拱坝-基础整体安全度、坝肩抗滑稳定性和抗震安全性,达到安全、经济、施工和运行方便的目的。相关优化方法与成果可为后续高拱坝体形多目标优化设计提供借鉴。

Multi-purpose optimization design for arch dam shape of Yangfanggou Hydropower Station

On the basis of fully understanding the characteristics of landform and geological condition at the dam site of Yangfanggou Hydropower Station and considering the previous study achievements and the suggestions at consultation sessions, under the constraining of engineer-procure-construct terms, the multi-purpose study and optimization design for the foundation plane and dam shape was conducted by multiple analysis and calculation means. In the optimization, quantitative and qualitative comprehensive evaluation was conducted in terms of safety, stability and economy. The results indicated that the optimization scheme can fully utilize the rock mass condition of the dam foundation, reduce water thrust on the dam, give full play to the compressive performance of concrete, reduce high tension stress and its distribution scope and furtherly improve the overall safety of the arch dam and foundation, abutment anti-sliding stability and seismic?stability, realizing the purposes of safe, economic and convenient construction and operation.