逆フィルターを用いた洗掘防止工に関する研究

抄録

The bed protection works around hydraulic structures such as weirs and bridge piers are usually collapse due to sinking into the sand caused by the sand removal around them especially during flood flow. Collapse of the protection works decrease the stability of important hydraulic structures, and they could be the factors of abrupt destruction of the hydraulic structures. Therefore, it is a very important hydraulic engineering problem to propose the protection works which is highly resistant against scouring. In this paper, effectiveness of the protection works against scouring using riprap reverse filter was investigated experimentally. Experimental results show that the riprap reverse filter have a great effect to protect the sand bed from scouring. And it is also clarified that the multilayered reverse filter has an effect to reduce the total thickness of the filter layer.