流木塊の橋脚への堆積に関する研究

抄録

The characteristics of the accumulation of a lump of floating logs on bridge pier are investigated by laboratory experiment. The results show that floating logs can be very dangerous for bridge when many floating logs make a lump even if the ratio of span to log length is little. If the floating log is long and the flow rate is calm, the area of a lump of floating logs causes the area of accumulation of a lump of floating logs on bridge pier without the influence of the condition of each floating logs. But the shorter the floating logs become and the larger the flow rate becomes, the smaller the area of accumulation of a lump of floating logs on bridge pier becomes.