The depth of water delivery and power generation system of pumped storage power station is large,which is affected by many factors such as natural groundwater,complex geological conditions,drainage galleries and water fill-ing in tunnels.Based on the Wangqing pumped storage power Station,a three-dimensional seepage steady state model in-cluding water delivery tunnel,underground powerhouse,drainage gallery,surrounding rock and fault is established based on FEFLOW.The distribution characteristics of seepage field along the longitudinal section of the water delivery and power generation system are analyzed,and the seepage flow of each part is predicted.According to the simulation re-sults,the initial scheme is optimized.The modified scheme eliminated the unnecessary drainage gallery in the middle hor-izontal section,and raised the drainage gallery in the lower horizontal section to discharge seepage water in the mode of self-flow.The total seepage flow of the drainage gallery and the cavern group in the workshop area was 8 048.16 m3/d,providing a greater degree of enrichment for the selection of drainage pumps in the underground powerhouse.The modi-fied scheme can achieve better anti-seepage and drainage effect,and has guiding significance for the optimization of seep-age control measures in similar projects.
关键词
抽水蓄能电站/输水发电系统/三维渗流场/渗透流量/FEFLOW
Key words
pumped storage power station/water delivery and power generation system/three-dimensional seepage field/seepage flow/FEFLOW
维普
万方数据