The Journal of the Convergence on Culture Technology (문화기술의 융합)

The International Promotion Agency of Culture Technology (국제문화기술진흥원)
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A Study on Track Deformation Characteristics of Turnout System by Adjacent Excavation Work on Urban Transit

인접굴착공사에 따른 도시철도 분기기 궤도의 변형 특성에 관한 연구

  • 김해성 (서울교통공사 토목사업소) ;
  • 최정열 (동양대학교 건설공학과) ;
  • 정지승 (동양대학교 건설공학과)
  • Received : 2022.06.13
  • Accepted : 2022.08.18
  • Published : 2022.09.30
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Abstract

The structure of the turnout track is very complex, so it is a facility that is more difficult to maintain and requires detailed management than a general track type. The purpose of this study is to analyze the effect on the deformation of the turnout system of the ground section due to the excavation work adjacent to the serviced urban railways. In this study, based on finite element analysis for each stage of adjacent excavation, the track deformation for each major location of turnout system was analyzed in consideration of the layout of the turnout system installed on the ground section, and the safety and stability was confirmed by comparing it with the track irregularity regulation. As a result of the study, it was found that the major construction stage affecting the track deformation of the turnout system on the ground section was the final stage of excavation. In addition, although the vertical displacement which is a vertical irregularity occurred relatively large, it was analyzed that the horizontal deformation was dominant overall, because of the excavation site is located on the side of the turnout system. In addition, it was analyzed that the amount of displacement at each major location of the turnout system is different, and there is a possibility that there may be a twist irregularity due to the deviation of the track deformation for each location according to the distance from the excavation site. Therefore, it was analyzed that it is necessary to classify and manage the importance of the track deformation of the turnout system of actual operating line, including additional displacement due to adjacent excavation, based on the track irregularity that has occurred at each location where the major deformation characteristics occur.

분기기 궤도구조는 매우 복잡한 구조와 다양한 구성품으로 구성되어 일반 궤도보다 유지관리가 어렵고 보다 상세한 관리기준이 필요한 철도시설물이다. 본 연구의 목적은 공용중인 도시철도 선로와 인접한 굴착공사에 따른 지상부 분기기 궤도구조의 변형에 미치는 영향을 분석하는 것이다. 본 연구에서는 인접굴착 시공단계별 수치해석을 바탕으로 지상구간에 부설된 분기기 궤도선형을 고려한 주요위치별 궤도변형을 분석하였으며 이를 궤도틀림 기준과 비교하여 안전성을 확인하였다. 분석결과, 지상 분기기 궤도변형에 영향을 미치는 주요 시공단계는 굴착 최종 단계로 나타났으며, 면(고저)틀림인 연직변위가 상대적으로 크게 발생하였으나, 전체적으로는 수평방향의 변형이 지배적인 것으로 분석되었다. 이는 굴착 현장이 분기기 측면에 위치하는 측방굴착의 영향인 것으로 판단된다. 또한 분기기 주요위치별 변형량이 상이하고 굴착현장과의 이격거리에 따른 위치별 궤도변형의 편차가 발생하여 평면성틀림이 발생될 소지가 있을 것으로 분석되었다. 따라서 현재 발생된 궤도틀림을 바탕으로 인접굴착에 따른 추가적인 변위를 포함한 실 운행선 분기기 궤도구조의 궤도변형을 주요변형 특성이 발생되는 위치별로 중요도를 구분하여 별도의 관리가 필요한 것으로 분석되었다.

Keywords

References

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