REVETMENT BLOCK STABILITY CONSIDERING EFFECTS OF LOCAL FLOW AND UPWARD FLOW

Abstract

 The drag force and lift force acting on a structure are generally evaluated by using the average flow velocity. It has been pointed out that a surface wave called a triangle-shape water surface wave is formed and the internal flow is locally changed under the supercritical flow, but its influence has not been evaluated. In this study, we evaluated the stability of blocks using different shape blocks under the supercritical flow. Also, the stability of blocks was examined using the equilibrium of force and moment considering local and upward flow. As a result, the model considering the local flow and upward flow was consistent with the experimental result. Therefore, it was clarified that the local flow and the upward flow greatly affect the stability of blocks.