DESIGN METHOD OF RIP RAP SCOUR PROTECTION WORKS FOR PIER IN FAST TIDAL CURRENT

Abstract

Riprap scour protection has been commonly used for piers. But the method of the design is rather empirical. In order to establish the practical and reasonable methods of design, the mechanism of the seepage flow in the scour protection should be carefully examined. The seepage flow is measured both in a hydraulic model test and in a field measurement at Akashi Strait Bridge. A design method of grain size of the inner and surface layer rubble mounds, thickness of rubble mound layer and construction area is proposed.