长江科学院院报2024，Vol.41Issue(12)：109-116,132,9.DOI:10.11988/ckyyb.20231373
抽水蓄能电站输水系统渗控效应及排水措施敏感性分析
Sensitivity Analysis of Seepage Control Effect and Drainage Measures in the Water Conveyance System of Pumped Storage Power Stations
摘要
Abstract
The water conveyance and power generation system of pumped storage power stations is generally buried deeply,and the three-dimensional seepage field distribution of the plant's chamber group is complex due to external seepage in the water diversion system.Drainage measures are crucial in controlling the seepage field of water trans-mission and power generation system.Using the three-dimensional seepage field finite element method,we construc-ted a numerical calculation model of Zhangye pumped storage power station's water delivery and power generation system,integrating the water conveyance system,underground plant system,and seepage prevention and drainage systems.Based on the distribution law of seepage field within the power generation system,we analyzed the impact of the drainage system beneath the pressure pipeline and the plant's drainage system on the seepage field.Results indicate that under normal operating conditions,most of the underground plant is above the wetting line,and seep-age flow is maintained within a reasonable range under the designed seepage control plan.Seepage overflows occur near the bottom of the plant chamber group,the pipeline exhibits characteristics of internal water seepage,and the seepage flow of the tailwater system is relatively large.The lower drainage gallery of the pressure pipe significantly influences the seepage field of the pressure pipe and the upstream side of the plant.A smaller drainage hole spacing results in a lower wetting line and larger seepage flow in the corresponding area,with a drainage hole spacing of 3 m proving more reasonable.The drainage system in the plant area significantly affects the seepage field of the under-ground plant.As the drainage hole spacing increases,the drainage effect diminishes,the flow into the collection well decreases,the wetting line rises slightly,and a drainage hole spacing of 3 m is deemed more reasonable.关键词
抽水蓄能电站/输水发电系统/地下厂房/输水系统/排水系统/渗流分析Key words
pumped storage power station/water transmission and power generation system/underground power-house/water conveyance system/drainage system/seepage analysis分类
建筑与水利引用本文复制引用
李锋,杨雨,温立峰,李炎隆..抽水蓄能电站输水系统渗控效应及排水措施敏感性分析[J].长江科学院院报,2024,41(12):109-116,132,9.基金项目
国家自然科学基金重点项目(52039008) （52039008）
国家自然科学基金杰出青年科学基金项目(52125904) （52125904）
