A study on the enlargement of 2-lane road tunnel under construction

시공중인 2차로 도로터널의 확장 방안에 대한 연구

  • 최해준 ((주)청석엔지니어링 지반공학부) ;
  • 김대규 (상명대학교 건설시스템공학과)
  • Received : 2010.12.10
  • Accepted : 2011.01.18
  • Published : 2011.01.31


Recently interest in enlargement of existing tunnel located in downtown or mountain area have been considerably increased along with requirements and discussion on the road-widening. Therefore, it is necessary to study the construction method and stability of tunnel to enlarge the existing tunnel in design. In this study, the design concept on the alignment, excavation method, reinforcement to enlarge the existing tunnel is described on the basis of the enlargement of 2-lane road tunnel under construction. This paper suggests a proper design method for the enlargement of an existing tunnel in useful practice.


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