Experimental study on optimal layout of grid desilting gallery

Yaozhe Zhang; Jingchang Wang; Zhichao Chang; Yi Zhang

doi:10.1007/s12209-009-0023-4

Transactions of Tianjin University ›› 2009, Vol. 15 ›› Issue (2) : 130 -134. DOI: 10.1007/s12209-009-0023-4

Article

Experimental study on optimal layout of grid desilting gallery

Author information +

History +

PDF

Abstract

Based on the desilting research of one scheduling project in the southwest of China, the method of setting grid desilting gallery before the desilting tunnel is put forward to expand the scope of the scouring funnel before the dam and solve the problem of sediment deposition at the power station water intake. The experimental results show that, in the design of a grid desilting gallery, the width of the grid gallery should not be smaller than that of the desilting bottom intake, the size of the grid orifice should be in the range of 1.5,m–2.0,m along the flow direction, and the grid spacing should be 3–5 times the size of the grid orifice. The discharging ability of the desilting bottom intake will decrease after the grid desilting gallery is added. The average of the decrease rates is about 5%–10%. The scouring funnel draws in the longitudinal direction before the dam obviously after the construction of the grid desilting gallery.

Keywords

grid desilting gallery / desilting bottom intake / grid orifice / grid spacing

Cite this article

Download citation ▾

Yaozhe Zhang, Jingchang Wang, Zhichao Chang, Yi Zhang. Experimental study on optimal layout of grid desilting gallery. Transactions of Tianjin University, 2009, 15(2): 130-134 DOI:10.1007/s12209-009-0023-4

登录浏览全文

4963

注册一个新账户忘记密码

References

Publishing order | Descend order by publishing year | Descend order by cited within

[1]	Pan Q. Sediment Research of Hydro-Project on Yangtze River[M]. 2003, Beijing: China Water Conservance and Hydropower Press.

[2]	Du G. Sediment Research and Practice of Hydro-Project[M]. 2008, Beijing: China Water Conservance and Hydropower Press.

[3]	Liang Z., Xu Y., Luo F., et al. Water Diversion Sediment Prevention and Fluvial Process[M]. 2000, Beijing: China Building Materials Press.

[4]	Institute of Plan and Design of Water Conservancy and Hydropower, Ministry of Water Resources. Compilation of Sediment Problem of Hydropower Station[R]. 1982(in Chinese).

[5]	Northwest Hydro-Tech Science Research Institute, Ministry of Water Resources. Sediment Problems in Design and Manage of Medium and Small Reservoirs[M]. 1983, Beijing: Science Press.

[6]	Dai X., Li Y., Chen S. Type of desilting bottom intake for hydropower station[J]. Water Resources and Hydropower Engineering, 2005, 36(10): 20-23.

[7]	Experimental Center of Northwest Hydro-Tech Science Research Institute, Ministry of Water Resources. Water Diversion and Sediment Prevention Experiments of Sai Zhu Hydropower Station[R]. 2005(in Chinese).