新疆阜康抽水蓄能电站工程上水库渗流三维有限元分析

为分析各水位工况下阜康抽水蓄能电站上水库坝体及坝基渗流场，获得坝体和坝基的位势分布、库区渗透流量等要素，根据工程坝址区地质、地形条件，建立渗流三维有限元模型并进行计算。计算结果表明，由于全库盆混凝土面板防渗方案库盆四周均布置了混凝土面板，库周和库底混凝土面板底下分别设有透水性较强的无砂混凝土垫层和碎石垫层用以排水，库区地下水位低于库盆防渗面板及其底下垫层。因此，无砂混凝土垫层和碎石垫层及其库底回填区和上部岩体均处于非饱和状态，不会直接作用在防渗结构上，因此库周及库底混凝土面板的抗浮安全性可以得到保证，本方案技术上是合理的。

Three-dimensional Finite Element Analysis on Seepage of Upper Reservoir in Fukang Pumped Storage Power Station Project in Xinjiang

In order to analyze the seepage field of the upper reservoir dam body and dam foundation of Fukang Pumped Storage Power Station under various water level conditions, and obtain the potential distribution of the dam body and dam foundation, the seepage flow in the reservoir area and the other elements, and based on the geological and topographic conditions of the project dam site, a three-dimensional finite element model of seepage is established to calculate. The calculation results show that due to the concrete panel seepage prevention scheme for the entire reservoir basin, the concrete panels are arranged around the reservoir basin, and the sand free concrete cushions and gravel cushions with strong water permeability are set under the concrete panels around the reservoir basin and at the bottom of the reservoir for drainage. The groundwater level in the reservoir area is lower than that of the impermeable panel and the cushion beneath the reservoir basin. Therefore, the sand free concrete cushion and gravel cushion as well as the backfill area at the bottom of the reservoir and the upper rock mass are in an unsaturated state, which will not directly act on the impervious structure. Therefore, the anti-floating safety of the concrete panels around the reservoir and at the bottom of the reservoir can be guaranteed. This scheme is technically reasonable.