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A study on the reduction of concrete lining re-bar according to the tunnel design factors

터널 설계인자 평가에 따른 콘크리트 라이닝 철근량 절감에 관한 연구

Si-On Kang1
,
Young-Duck Lim2
,
Jeong-Ho Shin3
,
Sang-Hwan Kim4*
강 시온1
,
임 영덕2
,
신 정호3
,
김 상환4*
1Graduate Student, Dept. of Civil Engineering, Hoseo University
2Vice President, Daehan Consultants Co., Ltd.
3President, Jungmin Engineering Co., Ltd.
4Professor, Dept. of Civil Engineering, Hoseo University
1호서대학교 대학원 토목공학과 석사과정
2(주)대한콘설탄트 부사장
3(주)정민이엔지 대표이사
4호서대학교 토목공학과 교수
*교신저자. *Corresponding Author. 
31 January 2018. pp. 197-209
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Abstract

This paper presents a study on the reduction of concrete lining re-bar according to the tunnel design factors. The design of the concrete lining increases the reinforcing re-bar according to the application of excessive load, and the economical efficiency is reduced. In order to improve the economical efficiency of tunnel construction, rational standards are required for the design factors of concrete lining. Therefore, this research analyzed the characteristics and problems of the design factors applied to the design of concrete lining. Also, the economical review of the concrete lining for design factor application was compared with the amount of reinforcing re-bar calculated from the section design using numerical analysis. The results show that the amount of re-bar is varied according to the design factors. That is, the required amount for re-bar in the tunnel concrete lining could be reduced in the design stage. The results of this study may be useful for economic design of concrete lining in the future.

Keywords
Tunnelling
Concrete lining
Relaxation load of ground
Coefficient of ground reaction
reinforcing rebar

본 논문은 터널 설계 시 설계 인자에 따른 콘크리트 라이닝 절근량 절감에 관한 연구 이다. 콘크리트 라이닝의 설계는 과다한 하중적용에 따라 철근보강이 증가하게 되며, 경제성이 줄어들게 된다. 터널 시공의 경제성을 향상시키기 위해서는 콘크리트 라이닝의 설계인자에 대해 합리적인 기준이 필요하다. 따라서 본 연구에서는 콘크리트 라이닝의 설계에 적용되는 설계 인자에 대하여 특징 및 문제점을 분석하였다. 또한 설계인자 적용에 대한 콘크리트 라이닝의 경제성 검토는 수치해석을 이용하여 단면설계를 통해 산정된 철근 보강량을 비교하였다. 분석 결과에 의하면 콘크리트 라이닝 설계 시 설계 인자의 적용에 따라 필요 철근량이 다르게 나타났다. 따라서 이 연구를 통하여 콘크리트라이닝의 철근량을 경감시킬 수 있는 것으로 나타났다. 이 연구 결과는 향후 콘크리트 라이닝의 경제적 설계를 위하여 유용하게 활용될 수 있을 것으로 판단된다.

키워드
터널
콘크리트 라이닝
지반이완하중
지반반력계수
철근보강
References
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 20
  • No :1
  • Pages :197-209
  • Received Date : 2017-12-13
  • Revised Date : 2018-01-03
  • Accepted Date : 2018-01-09
  • DOI :https://doi.org/10.9711/KTAJ.2018.20.1.197
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