The Study of Subgrade Operating Conditions at Bridge Abutment Approach

There is an ongoing problem of interaction between bridges and rail tracks. Interaction zones suffer early failure because of sudden stiffness change. There are some ways to equalize uneven stiffness – geogrid and geopier reinforcement, cement treatment, using of concrete boxes filled with crushed stone, using ballast glue / bond and so on. The presented study is devoted to oscillation distribution in subgrade at bridge abutment approach. Occurring oscillation was described with vibratory displacement amplitudes. Test sites had versatile stiffness structures – geogrid reinforcement and concrete boxes filled with crushed stone.

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