摘要
抽水蓄能电站输水发电系统埋深较大,受排水廊道、隧洞充水、复杂地质条件、天然地下水等多种因素影响,常形成复杂渗流场。依托汪清抽水蓄能电站工程,基于FEFLOW建立包含输水隧洞、地下厂房、排水廊道、围岩、断层的三维渗流稳态模型,分析了沿输水发电系统纵剖面的渗流场分布特征,并对各部位的渗流量进行预测。根据模拟结果对初始方案进行优化,修改方案取消了不必要的中平段排水廊道,并抬升下平段排水廊道使其以自流方式排出渗水,厂房区排水廊道和洞室群渗流量合计8048.16 m^(3)/d,为地下厂房排水泵选型提供了较大富裕度。修改方案取得较好的防渗排水效果,对类似工程的渗控措施优化具有指导意义。
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 filling in tunnels.Based on the Wangqing pumped storage power Station,a three-dimensional seepage steady state model including 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 results,the initial scheme is optimized.The modified scheme eliminated the unnecessary drainage gallery in the middle horizontal 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 8048.16 m^(3)/d,providing a greater degree of enrichment for the selection of drainage pumps in the underground powerhouse.The modified scheme can achieve better anti-seepage and drainage effect,and has guiding significance for the optimization of seepage control measures in similar projects.
作者
杨海滔
刘丹
卢斌
张志崇
YANG Hai-tao;LIU Dan;LU Bin;ZHANG Zhi-chong(China Water Northeastern Investigation,Design&Research Co.,Ltd.,Changchun 130021,China;Research Center on Cold Region Engineering Technology,Ministry of Water Resources,Changchun 130061,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)
出处
《水电能源科学》
北大核心
2024年第6期129-133,共5页
Water Resources and Power
基金
国家重点研发计划(2018YFC0407303)。
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
pumped storage power station
water delivery and power generation system
three-dimensional seepage field
seepage flow
FEFLOW
