流砂によるコンクリート製水路の摩耗に与える土砂粒径の影響に関する実験的研究

抄録

It is described the influence of the particle size on the erosion of the concrete flume under the flow with sediment load. The particle distribution in the depth and the ratio of the particle colliding on the bottom in the flow with deferent four particle size d=0.71mm, 1.03mm, 1.71mm, 3.00mm were measured in the experiments. It is shown the deferent ratio of the particle collisions on the flume bottom concerning with the small or large tractive force to the particles. If the tractive force becomes to be small, the ratio of the collision becomes to increase. A conclusion is that if the deferent particle sizes are in the condition of the suspended load, the concrete flume bottom is eroded as same type, that is, the same coefficient of the equation predicted erosion of the concrete bottom.