대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

  • 제42권4호
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  • Pages.509-517
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  • 2022
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  • 1015-6348(pISSN)
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  • 2799-9629(eISSN)
대한토목학회 (Korean Society of Civil Engeneers)
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신설 터널굴착이 지중 군말뚝 및 인접 터널의 거동에 미치는 영향 연구

Effect of New Tunnelling on the Behaviour of Grouped Pile and Adjacent Tunnel

  • 김수빈 (서울과학기술대학교 건설시스템공학과) ;
  • 오동욱 (동양대학교 철도건설안전공학과) ;
  • 조현준 (서울과학기술대학교 건설시스템공학과) ;
  • 이용주 (서울과학기술대학교 건설시스템공학과)
  • 투고 : 2021.12.07
  • 심사 : 2022.04.14
  • 발행 : 2022.08.01
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초록

도시의 대형화로 인해 도심지 지하공간은 점점 고밀화되어 가고 있으며, 지하공간 활용에 대한 수요 또한 급격히 증가하고 있다. 도심지에서는 상부뿐만 아니라 지중에도 통신, 교통 등을 위한 지중 구조물 또한 존재하고 있다. 이러한 도심지의 지중에 신설 구조물을 시공할 경우, 상부 및 지중에 존재하는 인접 구조물과의 상호거동에 대한 이해가 필수적이다. 따라서 본 연구에서는 기존 군말뚝 및 운영중 터널에 인접하여 터널이 신설될 경우 침하와 지중의 전단변형을 유한요소해석을 통해 분석한다. 운영 중 터널-말뚝 간의 이격거리, 말뚝 개수, 말뚝 중심간격 등이 변수로 고려되었으며, 수치해석을 통해 말뚝 및 인접 지반 침하를 비교한 결과, 말뚝의 중심간격보다 군말뚝-신설 터널 수직이격거리 및 운영중 터널-신설 터널 간의 수평이격거리가 침하에 더 큰 영향을 미치는 것으로 나타났다. 또한, 구조물 간의 이격거리 증가에 따라 신설 터널 굴착에 따른 전단변형률이 미치는 영향이 감소되는 것으로 나타났다.

The demand for underground infrastructures such as tunnels is expanding due to rapid urbanization. Tunnels in urban areas are usually constructed adjacent to structures supported by piles. Therefore, a proper understanding of pile-tunnel interaction due to tunnel excavation activities is vital. Thus, in this study, a numerical analysis is conducted to analyze pile settlements, ground surface settlements and shear deformations above an existing tunnel subject to the presence of an adjacent tunnelling, with vertical offsets, the number of piles and the pile spacing considered as variables in the analysis. The results show that the vertical offsets between the tunnel crown and the pile tip generatelarger settlement than the pile spacing. In addition, the vertical offset shows an inversely proportional relationship to the shear deformation due to new tunnelling.

키워드

과제정보

본 연구는 한국연구재단 과학기술분야기초사업 중 개인연구사업인 "이공분야기초연구사업(NRF-2021R1A2C2013162)"의 지원으로 이루어진 것으로, 이에 대한 깊은 감사드립니다. 본 논문은 2021 CONVENTION 논문을 수정·보완하여 작성되었습니다.

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