A Study on the Estimation of the Behaviors by Compression Method of Rock Pillar between Close Parallel Tunnels

Jae-Kyoung Kim; Song Lee

doi:10.7843/kgs.2013.29.12.87

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2013 Vol.29, Issue 12 Preview Page Next Page

A Study on the Estimation of the Behaviors by Compression Method of Rock Pillar between Close Parallel Tunnels 근접 병설터널에서 필라 압축방법에 따른 필라부 강도특성 변화에 관한 연구

31 December 2013. pp. 87-94

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Abstract

In recent years, tunnel construction is being increased in order to resolve traffic congestion around urban area, however there are a lot of difficulties due to restrictions such as interference with existing alignment, adjacent structures and cost increase of land acquisition as well as public complaints for negative environmental impacts near the expected tunnel construction site. Therefore, applications of close parallel tunnel have been increasing greatly. But close parallel tunnels cannot guarantee the stability compared with normal parallel tunnel which has enough distance between tunnels. So various methods to strengthen the pillar have been introduced recently, however there is few methods which consider the pillar behaviour in the state of compression. In this paper, the reinforcement methods which reflect the behavior of pillar were reviewed with comparision and analysis by numerical method.

Keywords

Parallel tunnel

Stability

Rock pillar

Strength/Stress ratio

Factor of safety

근래 들어 도심지 주변의 교통난 해소를 위한 터널 건설이 증가하고 있으나 기존 노선과의 선형, 주변 구조물과의 간섭, 용지 매입의 제한 및 매입비 증가 등과 같은 제한적인 요인과 터널예정 부지 주변의 민원 및 환경훼손 최소화 등과 같은 환경적인 요인으로 인해 터널 계획시 많은 어려움을 겪고 있다. 이를 해소하고자 터널간의 거리를 좁게 하는 근접병설터널의 사례가 증가하고 있으나 이러한 근접병설터널의 경우 터널간 거리를 충분히 확보하고 있는 일반적인 터널에 비해 안정성 측면에서 불리한 점이 많은데, 특히 좁은 필라부의 강도를 증가시키기 위한 다양한 방법을 적용하고 있으나 필라부의 적정한 거동특성을 반영한 필라부 보강공법은 많지 않은 실정이다. 본 논문에서는 필라부의 적정한 거동특성을 반영한 보강공법을 비교, 분석하고 이를 수치해석을 통해 검증하였다.

References

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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 : 29
No :12
Pages :87-94
Received Date : 2013-10-10
Revised Date : 2013-11-19
Accepted Date : 2013-12-04
DOI :https://doi.org/10.7843/kgs.2013.29.12.87

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

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