Safety Effect Evaluation of Existing Metro Tunnel by Deep Urban Tunnelling

Sang-Min Han; Dong-Hyuk Lee; Sung-Ho Lee

doi:10.7843/kgs.2021.37.9.37

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2021 Vol.37, Issue 9 Preview Page

Safety Effect Evaluation of Existing Metro Tunnel by Deep Urban Tunnelling 대심도 도심지 터널시공에 의한 기존 지하철 터널 안전영향 평가

30 September 2021. pp. 37-50

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Abstract

Recently, due to the expansion of urban infrastructure using underground spaces in urban areas, many adjacent constructions and excavations have been made carried out between existing facilities, and complaints related to the stability of existing facilities due to close construction have become significant issues. In this study, it was closely reviewed for the existing metro tunnel structure in the new Dongbuk urban metro railway to determine the behavioral characteristics of tunnel structure according to adjacent tunnel construction. Also, it was analysed the evaluation of the safety zone and excavation method for metro tunnel structure. And after a detailed damage assessment, track irregularities and structural calculation by using a numerical analysis, stability of the metro tunnel structure according to nearby tunnel excavation was evaluated to be secured for safety. This study is expected to be applied as practical reference to review the evaluation of safety effects of existing tunnel structure and buildings according to adjacent construction in complex deep urban tunnelling.

Keywords

Adjacent construction

Deep urban tunnelling

Metro tunnel

Safety evaluation

Stability analysis

최근 도심지구간에서 지하공간을 활용한 도시 기반시설 구축으로 인하여 시설물 상호 간의 인접한 근접 시공이 많이 이루어지고 있으며, 근접시공으로 인한 기존 시설물의 안정성과 관련된 민원이 상당한 이슈가 되고 있다. 본 연구에서는 대심도 도심지 구간에 신설되는 도시철도 터널의 근접시공으로 인한 기존 지하철의 터널구조물의 거동특성을 파악하기 위해 동북도시철도 터널이 계획된 노선 상부의 지하철 6호선 터널구조물을 대상으로 연구를 수행하였다. 기존 지하철 터널구조물의 안전영역 평가 및 굴착방법에 대한 개략적인 검토와 수치해석을 통한 상세검토를 수행하였으며, 건물 손상도 평가, 궤도틀림 및 구조물 안정성 검토결과 근접시공에 따른 지하철 터널 구조물 및 주변 건물의 안정성은 확보되는 것으로 평가되었다. 본 연구는 대심도 도심지 터널 건설에 따른 기존 터널 구조물 및 주변 건물의 안정성에 미치는 영향을 평가할 수 있는 실용적인 참고 자료뿐만 아니라 터널 지하안전영향평가에 대한 실무 적용사례로 활용될 수 있을 것으로 사료된다.

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Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 37
No :9
Pages :37-50
Received Date : 2021-09-01
Revised Date : 2021-09-17
Accepted Date : 2021-09-17
DOI :https://doi.org/10.7843/kgs.2021.37.9.37

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

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