A study on the seismic reinforcement method considering about failure forms of railway embankment on earthquake

Abstract

The seismic failure of the railway embankment is divided into 5 modes according to the embankment height and subsoil properties. In this study, the appropriate seismic reinforcement methods of embankments are proposed against failure modes Type-C; the circular slip of embankment and Type-D; the spread of the toes of embankment through centrifugal model tests and finite deformation analysis. The new findings are as follow; 1) The Nailing method against Type-C decreases the settlement of embankment since the reinforced bars prevent the circular slip of embankment, while the method against Type-D is hard to decrease the settlement. 2) For Type-C, the appropriate formation of the bars in the embankment, such as number, position and length is examined to be one-sixth of the common axial force, which can be applied to the new Nailing method.