Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Investigation of Settlement of Concrete Track on High-Speed Railway Due to Groundwater Variation

지하수위 변동에 따른 고속철도 콘크리트궤도의 침하 영향 검토

  • Received : 2016.11.15
  • Accepted : 2017.03.31
  • Published : 2017.04.30
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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.

고속철도 콘크리트궤도의 일부 토공구간 침하 원인으로 지하수위 저하가 보고되었다. 이에 본 연구에서는 현장 계측 값과 수치해석을 통하여 지하수위 저하에 따른 침하 영향을 분석하였다. 시행착오법을 이용한 역해석을 통해 구성된 수치해석 모델을 이용하여 지하수위 저하, 연약층의 두께, 성토고에 따른 잔류침하거동을 검토하였다. 4m이상의 연약층이 존재할 경우, 지하수위 저하에 의한 원지반침하량은 30mm이상으로 예상되어 설계 및 시공단계에서 지하수위 거동에 의한 침하도 설계시 고려되어야 할 것으로 보인다.

Keywords

References

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  1. Stability assessment of roadbed affected by ground subsidence adjacent to urban railways vol.18, pp.8, 2018, https://doi.org/10.5194/nhess-18-2261-2018