Abstract
The practicality of two-layered geotechnical filter for erosion protection in coastal facilities was investigated. Fist, the performance of geotechnical filters with a narrow grain size distribution was experimentally investigated and verified in view of the existing standard. Secondly, the mechanical stability of two-layered geotechnical filter was examined against earthquakes and traffic loads. Thirdly, the process of the internal erosion, cavity formation and collapse of reclaimed sand was observed by physical modelling tests and the effectiveness of the proposed geotechnical filter as the preventive measures was confirmed.
