2004 Volume 48 Pages 841-846
The bed protective work is installed to prevent structural damage due to bed scouring. However, bed scouring can also occur just downstream of the bed protective work and the last row elements suffers the largest hydrodynamic forces due to large water surface profile accompanied by a drop of water level. Therefore, we need to review the design method.
The purpose of this paper is to clarify the failure mechanism of bed protective works based on dynamical basis. First, we examined the failure mechanism of bed protective blocks due to drop in water level downstream of the blocks. Then, we measure the hydrodynamic forces acting on the last row elements in the threshold of block movement and consider the threshold of block movement through experiments.
