Residual Settlement Caused by Groundwater Drawdown on High-Speed Railway

초록

Groundwater drawdown is a significant factor for consolidation settlement, but it has been ignored in design stage of soft ground improvement. Slab tracks which are more suitable on high-speed and high-intensity traffic lines were constructed on soft soils along the west coast of Korea where additional settlement by ground water drawdown is expected. In this paper, the change of groundwater level from -0.5 to -4.5 m were considered to evaluate the settlements in a high-speed railway constructed on soft ground. Analysis result showed that the ground water drawdown causes significant settlement for the maintenance of high-speed railway.