Physical Model Test of the Deformation of Beach Fill and Natural Beach for the Evaluation of Fill Material Quality

Abstract

Use of beach fill materials, which have higher stability than the original natural beach sands, is increasing in Japanese beach fill projects. We therefore need more sophisticated methodology to design the beach fill projects. We performed hydraulic physical model tests to examine yield of the beach fill and erosion of the natural beach by the difference of the physical properties of the fill material. It was understood that erosiveness of the natural beach could be lowered when the material with smaller grain size was used. There is relation between erosion of natural beach under fill material and permeability of fill material.