Study on numerical simulation of seepage control and drainage scheme for underground power-house of pumped storage power station
The underground powerhouse of pumped storage power station is deeply buried,and is affect-ed by many factors such as drainage gallery,water filling of tunnel,complex geological conditions and natural groundwater,so the complex seepage field is often formed.Based on the FEFLOW software,a three-dimensional steady state model of seepage including water transmission tunnel,underground pow-erhouse,drainage gallery,surrounding rock and fault is established.According to the simulation results,the initial seepage control and drainage scheme is optimized,eliminating unnecessary drainage galleries in the middle horizontal section and lifting drainage galleries in the lower horizontal section to discharge seepage water in the form of natural flow.The total seepage flow of drainage galleries and cavern group in the powerhouse area is 8 048.16 m3/d,which provides a greater flexibility for the selection of drainage pumps for underground powerhouse.
pumped storage power stationunderground powerhousethree-dimensional seepage fieldseepage control and drainage scheme
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