Experimental Study on Optimal Layout of Grid Desilting Gallery  

作　　者：张耀哲 王敬昌 苌志超 张毅 

机构地区：[1]College of Water Resources and Architectural Engineering,Northwest Agricultural and Forestry University

出　　处：《Transactions of Tianjin University》2009年第2期130-134,共5页天津大学学报（英文版）

基　　金：Supported by National Key Technology R&D Program during the11th Five-Year Plan Period of China (No.2006BAD11B03)

摘　　要：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 desiring 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.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.

关 键 词：grid desilting gallery desilting bottom intake grid orifice grid spacing 

分 类 号：TV143[水利工程—水力学及河流动力学]