摘要
引水防沙是我国低水头河床式电站经常遇到的问题,对于含沙量较高的嘉陵江上游,上石盘电航工程电站进水口的排沙问题较为突出。为控制悬移质泥沙在电站的前池内淤积,减少过机泥沙,开展了电站排沙廊道水工模型试验,对其泄流能力、流速分布及排沙效果等进行研究和分析。研究结果表明,廊道泄流能力主要受上下游水位差控制,通过试验建立的泄流能力计算公式与试验实测结果基本吻合;廊道排沙受进口近底流速影响较大,泄流量越大,拉沙量也相对越大,但最大拉沙率不超过45%。
Sediment problem in Shangshipan hydroelectric - navigation project intake is more prominent. To control suspended sediment deposition in forebay of hydropower and reduce overmachine sediment, the hydraulic model tests of desihing gallery has been carried out to study discharge capacity, velocity distribution and sediment flushing effects . The experimental results can provide a reference for the engineering design and operation management.
出处
《浙江水利科技》
2014年第4期13-17,共5页
Zhejiang Hydrotechnics
关键词
河床式电站
排沙廊道
模型试验
嘉陵江
上石盘
power station in river channel
desilting gallery
model test
Jialing River
Shangshipan
