Field Observation of Wave induced Seabed Behavior for the estimation of geomaterial properties and the effect of permeable column method

摘要

The response of seabed to sea wave loading was observed in New Ishikari Gulf Port, Hokkaido, Japan. We developed the observation rod, which is equipped with pore water pressure cells and earth pressure cells. Two observation rods were installed vertically near a sand groin located east side of the port; one of the two observation rods was surrounded by permeable columns installed vertically. The fluctuating pore water pressure and horizontal total earth pressure in the seabed were thus monitored at different levels of depth. The purpose of the field observation is to examine; (1) a method for estimating the response parameters of seabed to sea wave loading, (2) the effect of permeable column method for stabilizing seabed. The method of the observation is described and the observation results are analyzed to discuss the response behavior of the seabed.