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An Analysis of Safety Zone Appropriateness of Urban Railway Box Structures by Adjacent Excavation Using Machine Learning Technique

머신러닝 기법을 적용한 인접굴착에 따른 도시철도 박스구조물의 안전영역 적정성 분석

  • 최정열 (동양대학교 건설공학과) ;
  • 이재승 (서울교통공사 토목사업소) ;
  • 정지승 (동양대학교 건설공학과)
  • Received : 2023.03.29
  • Accepted : 2023.05.28
  • Published : 2023.05.31

Abstract

This study analyzed the relationship between major parameters and numerical analysis results according to various excavations conducted around the urban railway, application of machine learning techniques and verified the scope of influence of the adjacent excavation on the existing urban railway box structure and the appropriateness of the safety area. This study targeted the actual negotiated adjacent excavation works and box structures around the urban railway, and the analysis was conducted on the most representative two-line box structures. The analysis confirmed that the difference in depth of urban railway, excavation depth of adjacent excavation, and depth of underground water level are important parameters, and the difference in excavation depth of adjacent excavation is the parameter that affects the behavior of underground box structures and is an important requirement for setting safety areas. In particular, the deeper the depth of the adjacent excavation work, the greater the effect on the deflection of the underground box structure, and the horizontal separation distance, one of the important requirements for determining the management grade of the existing adjacent excavation work, is relatively small.

본 연구는 인접굴착에 따른 기존 도시철도 박스구조물의 안전영역에 관한 연구로서 도시철도 주변에서 시행되는 각종 굴착공사에 따라 도시철도 박스구조물의 거동에 영향을 미치는 주요 매개변수와 수치해석 결과의 상관관계를 분석하였으며, 머신러닝 기법 적용을 통하여 인접굴착공사가 기존 도시철도 박스구조물에 미치는 영향 범위 및 안전영역의 적정성을 검증하였다. 본 연구는 도시철도 주변의 실제 협의된 인접굴착공사 및 박스구조물을 연구대상으로 하였으며, 그 중 가장 대표적인 본선 2련박스 구조물을 대상으로 분석을 수행하였다. 매개변수 분석 및 머신러닝 해석결과, 도시철도 깊이, 인접굴착공사 굴착깊이 및 지하수위 각각의 상호간의 깊이 차이가 중요한 매개변수인 것으로 확인되었으며, 그 중에서도 도시철도 깊이와 인접굴착공사의 굴착깊이 차이가 지하 박스구조물 거동에 가장 큰 영향을 미치는 매개변수이며, 안전영역 설정의 중요한 요건인 것으로 분석되었다. 특히, 인접굴착공사 깊이가 도시철도 깊이보다 더 깊게 굴착될수록 지하 박스구조물의 처짐에 미치는 영향은 더욱 큰 것으로 확인되었으며, 기존의 인접굴착공사 관리등급 결정 시 중요 요건 중 하나인 수평이격거리는 수직이격거리, 즉 굴착깊이에 비해 상대적으로 영향이 작은 것으로 분석되었다.

Keywords

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