空石積み護岸の積み石の引き抜き耐力の評価と設計手法

抄録

Dry masonry revetments had been used long time as traditional Japanese river revetments. However, there is little knowledge about their strength and design method currently, it is difficult to select the method in case of revetment construction. From the landscape design and ecological view, there is still a lot of demand for dry masonry revetment. For installation of dry masonry revetment, it is necessary to conduct scientific verification of the destruction behavior and strength of the method. We examined by the pulling out experiment the strength when the stacking stones of the dry masonry revetments leaving by fluid force. And we obtained the following result.

・In the case of there were two steps of masonry on top, the pull-out resistance required about five times the weight of the stone. This was about three times as strong as without stone interlocking.

・The pull-out force required the larger force when pulled 45 degrees to the flow axis direction than when pulled at 90 degrees.