Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Influence of the joint stiffness on the segment design

이음부 강성계수가 세그먼트 설계에 미치는 영향

  • Choi, Woo-Yong (Konkuk University, Dept. of Civil and Environmental System Engineering) ;
  • Park, Jong-Deok (Konkuk University, Dept. of Civil and Environmental System Engineering) ;
  • Lee, Seok-Won (Konkuk University, Dept. of Civil and Environmental System Engineering)
  • 최우용 (건국대학교, 사회환경시스템공학과) ;
  • 박종덕 (건국대학교, 사회환경시스템공학과) ;
  • 이석원 (건국대학교, 사회환경시스템공학과)
  • Received : 2014.01.06
  • Accepted : 2014.01.23
  • Published : 2014.01.29
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Abstract

The lining of shield TBM tunnel is composed of segments, therefore segment joints are induced by connecting each segment. Segment joint is considered as joint stiffness in the design of TBM tunnel. Depending on the choice among the different stiffness equations, the joint stiffness values determined can be varied largely. Therefore, the influence of joint stiffness value on the design of segment lining should be verified. In this study, the joint stiffness values were determined firstly by using various equations and total change boundary was justified. Within the change boundary determined, the member forces were calculated by changing the joint stiffness through the numerical analysis and consequently the stability of segment lining was investigated by applying nominal strength. The results showed that the segment joint stiffness did not affect the design of segment lining largely.

쉴드 TBM 터널의 라이닝은 세그먼트로 구성되므로, 각각의 세그먼트가 서로 연결되면서 세그먼트 이음부를 발생시킨다. 세그먼트 이음부는 쉴드 TBM 설계에 있어 강성계수로 적용되어지는데, 세그먼트 이음부 강성계수는 그 결정 방법에 따라 결과 값이 현저한 차이를 보인다. 따라서 서로 다른 강성계수를 설계에 적용하였을 경우 그 결과가 어떻게 다른지에 대한 검토가 필요하다. 본 연구에서는 세그먼트 이음부 강성계수를 이론식을 통해 결정한 후 일정한 범위를 선정하였다. 그 범위 내에서 강성계수를 변화해가며 터널 단면 수치해석을 실시하여 세그먼트 라이닝 부재력을 도출하였고, 이에 강도설계법을 적용하여 세그먼트 라이닝 안정성 검토를 실시하였다. 그 결과 세그먼트 이음부 강성계수는 세그먼트 라이닝 설계에 큰 영향을 미치지 않는 것으로 나타났다.

Keywords

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Cited by

  1. A study on the member forces of segmental linings considering key segments vol.17, pp.3, 2015, https://doi.org/10.9711/KTAJ.2015.17.3.363