摘要
鉴于新型抽水蓄能电站输水系统在空间布局与经济性方面具有独特的优势,开展了抽水蓄能电站引水竖井与调压井结合布置结构有限元分析。首先建立转弯管、调压室竖井及外覆岩体共存的整体模型,然后进行引水竖井与调压井结合布置有限元分析,揭示转弯段与连接管连接处应力、应变的分布规律,最后开展调压室衬砌体型优化设计,探讨混凝土喷层厚度与调压室大井衬砌底板位置对结构受力的影响。结果表明,引水竖井与调压井结合布置在转弯段内侧和转弯段与连接管连接的衬砌处出现局部应力集中现象,但结构总体安全;增加混凝土喷层厚度能有效改善引水竖井与调压井结合布置体型受力情况;调压室大井底板衬砌位于转弯段出口处的体型受力情况较其他体型良好。
The water transmission system of new-type pumped storage power station has unique advantages in terms of spatial layout and economy.Finite element analysis of combined arrangement of diversion shaft and surge shaft for pumped storage power station were studied.Firstly,the model incorporating the bend section,surge shaft,and overlying rock mass was established.Then,the finite element analysis of the combined arrangement of diversion shaft and surge shaft was carried out to reveal the stress-strain distribution patterns at the location where the turning section is connected to the connecting pipe.Finally,the optimized design of the surge shaft lining was conducted to explore the influence of the thickness of the concrete spray coating and the position of the bottom plate of the large well lining in the pressure regulating chamber on the structural stress.The results indicate that the localized stress concentrates on the inside of the turning section and on the lining of the turning section and the connecting pipe.But the structure is generally safe.It is effective to add concrete spray layers for improving the stress of the combined layout of diversion shaft and surge shaft.The body of the surge chamber's large well floor liner located at the outlet of the turnaround section is better stressed than the other body types.
作者
谢昌亚
朱龙飞
白齐健
黄敏
李祥勇
宋亚军
郭文成
XIE Chang-ya;ZHU Long-fei;BAI Qi-jian;HUANG Min;LI Xiang-yong;SONG Ya-jun;GUO Wen-cheng(Electric Power Research Institute of State Grid Jibei Electric Power Co.,Ltd.,Beijing 100045,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《水电能源科学》
北大核心
2025年第10期159-163,共5页
Water Resources and Power
基金
国网冀北电力有限公司电力科学研究院科技项目(KJC2024063)。
关键词
抽水蓄能电站
竖井
调压井
结合布置
有限元计算
应力应变
pumped storage power station
shaft
surge shaft
combined type
finite element calculation
stressstrain
