透水性一様斜面上に設置した袋型被覆材に作用する波力と耐波安定性に関する研究

抄録

Stability of an Filter Unit (FU) on sloping breakwater has been investigated in relation with wave forces acting on it. Laboratory experiments have been conducted to measure the stability and pore pressures. Numerical simulation also computes the pore pressure of sloping breakwater. It is found that the uplift force due to difference of pore pressures on upper and lower surfaces of an FU acts on the FU installed near the shoreline and it affects stability significantly. Numerical analysis is confirmed to reproduce well the features of pore pressure in the FU layer as well as velocity field above the sloping breakwater. It is also revealed that the Hudson coefficient of FU is larger than that of armor rubble, which indicates that an FU is suitable in practical use as far as stability is concerned.