摘要
在水电站地下洞室群的施工及长期运行中,地下渗流排水孔会因渗流结晶等各种因素导致堵塞失效。基于排水孔模拟的隐式复合单元法,提出非稳定渗流情况下排水措施的模拟方法,结合非稳定渗流的抛物型变分不等式提法,研究随排水措施逐渐失效过程中地下渗流场随时间变化的规律。采用简化算例分析计算表明:排水措施逐渐失效过程中,地下水随时间呈现前期抬升速度快、后期抬升速度慢的规律,厂房洞壁渗流量随着排水孔的失效迅速增大,需尽量避免排水设施失效。
In the construction and long-term operation of the underground caverns in a hydropower station,underground drainage holes may be blocked due to various factors such as seepage crystallization.Based on the implicit composite element method for drainage hole simulation,an analysis scheme for drainage measures considering unsteady seepage is proposed.Combined with the parabolic variational inequality formulation of unsteady seepage,the temporal variation of the underground seepage field with the gradual failure of drainage measures is studied.The results of a simplified example show that with the gradual failure of drainage measures,the groundwater rises rapidly in the early stage and slowly in the later stage.The seepage flow through the powerhouse wall increases rapidly with the failure of drainage holes.Thus,in the actual operation of the project,the failure of drainage measures should be avoided as far as possible.
作者
王子捷
肖明
WANG Zijie;XIAO Ming(State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering (Wuhan University), Ministry of Education, Wuhan 430072, China)
出处
《水电与新能源》
2021年第4期38-42,共5页
Hydropower and New Energy
基金
国家自然科学基金资助项目(52079097)。
关键词
地下工程
非稳定渗流
排水措施
堵塞失效
复合单元法
underground project
unsteady seepage
drainage measure
blockage failure
composite element method
