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1  ,     2    .     ·         .      ,        [1].               .        ,        .               [2].      , ,       .      30mm       .     (  )  (,  )   .                 [3].                  .                   30mm         . Abstract Groundwater drawdown was pointed out as one of the causes of induced settlement on high speed railways, especially concrete track. In this study, the effect of groundwater variation on settlement was evaluated through a comparison of field measurements with numerical analysis results. A trial and error method, i.e., repeated numerical analyses by changing material properties, was used to calibrate the model. The model was applied to investigate the effect of groundwater drawdown, thickness of soft layer, and embankment height on residual settlement after concrete track completion. A soft layer thicker than 4m would result in more than 30mm of settlement; a detailed analysis of groundwater behavior thus should be conducted from the design stage to construction.

Investigation of Settlement of Concrete Track on High-Speed Railway Due to Groundwater Variation