Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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A Study on Settlement Characteristics of Earthwork Subgrade with Lowering the Groundwater in High-speed Railway

지하수위 저하에 따른 고속철도 토공노반 침하특성에 관한 연구

  • Kim, Young-Ha (Seoul National Univ. of Science & Technology, Graduate School of Railway) ;
  • Eum, Ki-Young (Advanced Infrastructure Research Team, Korea Railroad Research Institute) ;
  • Han, Sang-Jae (Expert Group Earth And Environment Co., Ltd.) ;
  • Park, Yong-Gul (Seoul National Univ. of Science & Technology, Graduate School of Railway) ;
  • Jung, Jae-Hyun (Expert Group Earth And Environment Co., Ltd.)
  • 김영하 (서울과학기술대학교 철도전문대학원) ;
  • 엄기영 (한국철도기술연구원 고속철도인프라연구단) ;
  • 한상재 ((주)지구환경전문가그룹) ;
  • 박용걸 (서울과학기술대학교 철도전문대학원) ;
  • 정재현 ((주)지구환경전문가그룹)
  • Received : 2015.03.12
  • Accepted : 2015.04.27
  • Published : 2015.05.31
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Abstract

Unlike the primary consolidation settlement, the settlement of ground water lowering is not considered separately because of relatively small residual settlement. But the allowed residual settlement (30 mm) of the concrete track in the high-speed railway may be exceeded due to unexpected excessive ground water lowering. This study analyzed the effect of the settlement according to the ground water level change using finite element analysis of stress-pore pressure coupling model, and compared the analysis results with the measured data. As a result, the range of elasticity modulus satisfying the allowable settlement was proposed, and it is suggested that settlement due to ground water level changes should be reflected in the design.

지하수위 하강에 따른 침하량은 1차 압밀 침하량에 비해 비교적 작기 때문에 잔류침하량 산정시 별도로 고려하지 않는다. 그러나 고속철도 콘크리트 궤도에서의 허용잔류침하량은 30mm로 작기 때문에 예기치 못한 과도한 지하수위 하강으로 인하여 허용잔류침하량을 초과할 수 있다. 본 연구에서는 응력-간극수압 유한요소 해석을 통하여 지하수위 변동에 따른 침하 영향을 분석하여 해석결과와 실측자료를 비교하였다. 그 결과 허용잔류침하량을 만족하기 위한 탄성계수 범위를 제시 하였으며 설계 시 지하수위 저하 영향이 반영되는 것이 타당하다고 판단된다.

Keywords

References

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