SEISMIC MODELING OF EMBANKMENTS ON SATURATED SOIL DEPOSITS

Following an earthquake it is important that the transport networks are operable for the use of relief convoys. Following the Northridge earthquake several of the key road networks in the Los Angeles area have become unusable. Kobe earthquake presented a similar problem to the transport networks. Embankments constitute a key element in highways and other transport networks. It is therefore important to ensure the safety of embankments subjected to seismic loading. This paper presents the results of the centrifuge tests carried out as a preliminary investigation into the behaviour of granular embankments founded on loose saturated sand subjected to earthquake loading. It was observed that the embankment settled by considerable amounts during the earthquakes. The post test investigation revealed that gravel had sunk into the sand foundation and there was some lateral spread of the embankment.