水利水电技术2017，Vol.48Issue(7)：123-128,6.DOI:10.13928/j.cnki.wrahe.2017.07.021
墩头超长实用堰泄洪安全分析及模型试验验证——以缅甸DAPEIN(Ⅰ)水电站工程为例
Safety analysis and model test verification on flood discharge of weir with super-long pier head——a case study of DAPEIN (I) Hydropower Station in Burma
江凌 1秦根泉2
作者信息
- 1. 江西省水利规划设计研究院,江西南昌330029
- 2. 江西省水工结构技术研究中心,江西南昌330029
- 折叠
摘要
Abstract
By taking DAPEIN (Ⅰ) Hydropower Station in Burma as a study case,the impact from the super-long extension of the gate pier head of the WES weir to the upstream direction on the safety of flood discharge is discussed herein.For the characteristics of the WES weir that the flow coefficient and surface hydrodynamic pressure are prone to be affected by the boundary factors,the layout on the weir crest and the shape of the pier head of the design section are optimized.In accordance with the calculation formula of the weir surface cavitation number and flow characteristics,the key locations to be calculated are deduced,so as to make a pertinent calculation on the cavitation number.Meanwhile,the discharge capacity and the surface hydrodynamic pressure of the overflow weir are tested by the physical model with the scale of 1 ∶ 60.The test result shows that the discharge capacity of the overflow weir from the model test is quite close to that from the design.Except the occurrence of a slight negative pressure of -1.2 kPa of the weir surface hydrodynamic pressure at the measuring point B4 of the operation condition 2,all the values of the weir surface time-average pressure are larger than 0.Thereby,the reasonability of the design is verified in both the aspects of the discharge capacity and the weir surface hydrodynamic pressure.The problem of the structure layout encountered in the project is a common problem in the projects of medium-low overflow dam,and then the solution idea mentioned herein can provide a reference for the similar projects in the days to come.关键词
DAPEIN(Ⅰ)水电站工程/WES实用堰/墩头长度/泄流能力/空化空蚀/物理模型试验/缅甸Key words
DAPEIN (Ⅰ) Hydropower Station/WES practical weir/pier head length/discharge capacity/cavitation and cavitation erosion/physical model test/Burma分类
水利科学引用本文复制引用
江凌,秦根泉..墩头超长实用堰泄洪安全分析及模型试验验证——以缅甸DAPEIN(Ⅰ)水电站工程为例[J].水利水电技术,2017,48(7):123-128,6.
