Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Numerical Analysis of Track Irregularity in Excavation Adjacent to Railway Trackbed

수치해석을 통한 철도노반 인접 굴착 시 궤도틀림 분석

  • Seokjun Lee (Dept. of Railway Construction and Safety Engineering, Dongyang University) ;
  • Dongwook Oh (Department of Railway Construction and Safety Engineering, Dongyang University) ;
  • Seongmin Jang (Dept. of Construction Engineering, Dongyang University) ;
  • Batchimeg, Banzragchgarav (Dept. of Railway Construction and Safety Engineering, Dongyang University) ;
  • Hyuksang, Jung (Dept. of Railway Construction and Safety Engineering, Dongyang University)
  • Received : 2023.11.08
  • Accepted : 2023.11.24
  • Published : 2023.12.01
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Abstract

In this paper, a track irregularity according to adjacent deep excavation of railway was analyzed using three-dimensional numerical analysis. The construction for excavation adjacent to the railway track is likely to have a negative impact on train operations. Despite mandatory assessments of the stability and impact on adjacent structures during construction, reports continue to indicate ongoing settlement and track irregularity resulting from construction. Changes in the groundwater level and stress state of the ground due to excavation are pointed out as causes for settlement and track irregularity in structures adjacent to the excavation. In this study, therefore, numerical analysis was conducted taking into account factors that induce track irregularity during adjacent excavation work as variables. The KRL-2012 standard train load was applied to simulate operating trains. As a results, The position of the train load, the distance from the excavation point, had a significant impact on track irregularity, and there was a significant occurrence of track misalignment when the train load was applied. The impact of the groundwater level was not significant.

본 논문에서는 3차원 수치해석을 통해 철도 노반에 인접한 굴착공사 시 궤도의 틀림을 분석하였다. 철도 노반에 인접한 굴착 공사는 열차 주행에 영향을 미칠 가능성이 높아 공사 시 인접 구조물의 안정성 및 영향성 검토를 필수로 수행하고 있지만, 그럼에도 불구하고 공사에 따른 침하 및 궤도틀림이 지속적으로 보고되고 있다. 굴착공사로 인한 지하수위, 지반의 응력 상태 변화 등은 인접 굴착 공사에 따른 구조물의 침하와 궤도틀림의 원인으로 지적되고 있다. 따라서, 본 연구에서는 인접 굴착 공사 시 궤도 틀림을 유발하는 인자를 변수로 고려하여 수치해석을 수행하였으며 운행 열차를 모사하기 위해 KRL-2012 표준 열차하중을 적용하였다. 분석 결과, 열차하중의 위치, 굴착지점과의 거리가 궤도틀림에 큰 영향을 미치는 것으로 나타났으며, 열차 하중이 작용할 때 궤도 틀림이 크게 발생하는 것으로 나타났다. 지하수위의 영향은 크지 않은 것으로 나타났다.

Keywords

Acknowledgement

This research was by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (RS-2022-00144026).

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