Residual sliding deformation analyses of geosynthetic-reinforced railway embankment due to large earthquakes

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This papers presents the appropriate seismic resistant design of geosynthetic-reinforced embankments against large earthquakes. The analyses method is based on a equation of rotational motion for soil block assumed by a circular failure plane. A series of parametric studies to determine the permanent displacements of reinforced embankments was conducted by varying the soil materials parameters, the height of embankments, the soil materials parameters, the layouts of reinforcement and design earthquakes in depicted in design standards of railway structures recently revised.As a result, the combined method of short and long geosynthetic-reinforcements is satisfied for required seismic performances. Short geosynthetic-reinforcements with low strength are spread near slope in each layer at vertical intervals of 0.3 meters. This existing method is used for layer compaction depicted in design standards. Longer geosynthetic-reinforcements with high strength are spread over in embankment at vertical intervals of 1.5 meters.
国際ジオシンセティックス学会日本支部の論文