ESTIMATION OF PRESSURE ACTING ON THE GROUND BEHIND THE HIGH RUBBLE MOUND SEAWALL AND MEASURES TO REDUCE PRESSURE

Abstract

 In the seawall with high rubble mounds, the surface of rubble was covered with asphalt mat and measures were taken to remove landfill sand from foundation rubble. Three years after the completion of the landfill, the road behind the revetment swelled, and from the results of the field survey, it was assumed that wave pressure was the cause. As a countermeasure, in order to provide an opening for depressurization of on the apron of the seawall, on-site observations were conducted to investigate the relationship between waves and pore water pressure, and a numerical model for the interaction between waves, ground and structures was used. The required width of the opening was studied by numerical calculation.