The Journal of Engineering Geology (지질공학)

The Korean Society of Engineering Geology (대한지질공학회)
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Tunnel Instrumentation on the Lattice Girder using Load Cells

로드셀을 이용한 격자지보 계측

  • Received : 2012.09.09
  • Accepted : 2012.09.20
  • Published : 2012.09.28
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Abstract

The use of lattice girder is increased rapidly as a substitute for H-steel ribs at the tunnel sites in Korea. Ground loads acting on the tunnel are supported by shotcrete and lattice girders. To assess the safety of the tunnel, it is essential to obtain field measurements for the lattice girders; however, lattice girder measurements have rarely been performed at tunnel sites, and the method of measurement is not well established. In the present study we suggest a load cell method for the instrumentation of tunnels with lattice girders. Actual measurements of ground loads acting on lattice girders are presented for a specific tunnel under construction.

국내 터널현장에서는 기존 H형 강지보를 대체하는 격자지보의 사용이 급격히 증가되고 있다. 터널에 작용하는 지반하중은 숏크리트와 격자지보에 의하여 지지된다. 따라서 터널의 안정성을 평가하기 위해서는 격자지보에 대한 계측이 필수적이다. 그러나 현재까지 국내에서는 격자지보에 대한 계측이 거의 수행되지 않았으며 적절한 계측 방법도 확립 되지 못한 상태이다. 본 연구에서는 격자지보용 로드셀을 이용한 신뢰성 있는 격자지보 계측 방법을 제안하였다. 또한 시공 중인 터널현장에서 격자지보 계측을 수행하여 격자지보에 작용하는 지반하중을 제시하였다.

Keywords

References

  1. Baumann, T. and Betzle, M., 1984, Investigation of the performance of lattice girders in tunnelling, Rock Mechanics and Rock Engineering, 17(2), 67-81. https://doi.org/10.1007/BF01042710
  2. Baumeister, A. E. and Ertel, J., 1985, Lattice girder construction and dimensioning, Tunnel, 2, May 95-106.
  3. Betzle, M., 1987, Lattice girders giving arches a dig in the ribs, Tunnels & Tunnelling, 19(11), 53-54.
  4. Braun, W. M., 1983, Lattice girders offer economy and performance for tunnel support, Tunnels and Tunnelling, 15(5), 19-22.
  5. KICT (Korea Institute of Construction Technology), 1996, Application of lattice girders in tunnelling, Chunwon Industries, 281p (in Korean).
  6. Kim, H. J., Jin, S. H., and Park, S. H., 2008, Field measurements for the lattice girder and the shotcrete lining, The Journal of Engineering Geology, The Korean Society of Engineering Geology, 18(1), 93- 102 (in Korean).
  7. Kim, H. J., Park, S. H., and Bae, G. J., 2010, Suggestion for the improvement of the field measurements on the shotcrete lining, Tunnelling Technology, Korean Tunnelling Association, 12(2), 177-192 (in Korean).
  8. Kim, H. J., Park, S. H., and Lee, G. S., 2009, Suggested method for the tunnel instrumentation on the lattice girder from the results of the laboratory test using load cells, The Journal of Engineering Geology, The Korean Society of Engineering Geology, 19(3), 269- 275 (in Korean).
  9. MCT (Ministry of Construction Transportation), 1996, Standard specification for tunnel, Korean Tunnelling Association, 154p (in Korean).
  10. Moon H. D., 1999, Evaluation on the applicability of a lattice girder for a support system in tunnelling, Tunnel and Underground, Journal of Korean Society for Rock Mechanics, 9, 204-213 (in Korean).
  11. Moon H. D., Baek, Y. S., and Bae, G. J., 1997, An experimental study on the characteristics of a composite structure of lattice girder and shotcrete, Journal of the Korean Geotechnical Society, 13(2), 155-167 (in Korean).
  12. Moon H. D., Lee, S. W., and Bae, G. J., 1996, Evaluation of an applicability of lattice girders for the tunnel support, Tunnel and Underground, Journal of Korean Society for Rock Mechanics, 6(2), 122-130 (in Korean).
  13. U. S. Army Corps of Engineers, 1997, Engineering and design tunnels and shafts in rock, Manual No. 1110- 2-2901, 206p.
  14. Ward, W. H., 1978, Ground supports for tunnels in weak rocks, Geotechnique, Vol. 28, No. 2, pp. 133-171.
  15. Yoo, C. S., Kim, Y. J., Bae, G. J., and Moon, H. D., 1997, An experimental study on load bearing capacity of lattice girder as a steel support in tunnelling, Journal of the Korean Geotechnical Society, 13(4), 163-175 (in Korean).

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