2015 Volume 21 Pages 83-88
Currently, sediment removal method using suction pipe is researched as an effective method for discharge of accumulated sediment in dam reservoir. Vertical multi-holes double-pipes system is one of the method and has been researched for practical application in dam site. This paper shows the laboratory tests of the system and the verification of the result of the tests. Firstly, the laboratory tests by small model and nearly full-scale prototype system was carried out to check the suction ability. Secondly, the hydraulics model was constructed with results of the tests. Finally, the estimation method of discharging sediment concentration with the flow and the loss of pressure in the pipe has been developed.
