FUNDAMENTAL OPEN CHANNEL TEST FOR RAILWAY BACK-FILL OF ABUTMENT OF EROSION PROCESS DUE TO FLOOD

Abstract

 Owing to the recent flood scale expansion due to climate change, erosion and washout of road and railway bridge abutment back embankments are occurring frequently. A wing walls and a small retaining wall are constructed on the embankment slope of the back embankment of the railway bridge. However, the disaster mechanism is not clarified. In this study, we conducted a basic study on displacement/collapse behaviour from an open channel test on a model embankment that reproduced a wing wall and small earth retaining wall. As a result, the depression of the embankment slope occurred at the boundary between the wing walls and the small retaining wall. The collapse of the top of the embankment progressed and the wing wall and a small retaining wall washout from this depression.