DOI QR코드

DOI QR Code

Real-scale Accelerated Testing to Evaluate Long-term Performance for Bridge/Earthwork Transition Structure Reinforced by Geosynthetics and Cement Treated Materials

토목섬유와 시멘트처리채움재로 보강한 교량/토공 접속구조의 장기공용성 평가를 위한 실물가속시험

  • Lee, Il-Wha (High-Speed Railroad Systems Research Center, Korea Railroad Research Institute) ;
  • Choi, Won-Il (Construction Headquarters, Korea Rail Network Authority) ;
  • Cho, Kook-Hwan (Department of Railway Construction, Seoul National University of Science and Technology) ;
  • Lee, Kang-Myung (High-Speed Railroad Systems Research Center, Korea Railroad Research Institute) ;
  • Min, Kyung-Chan (High-Speed Railroad Systems Research Center, Korea Railroad Research Institute)
  • Received : 2014.02.07
  • Accepted : 2014.07.22
  • Published : 2014.08.31

Abstract

The transition zone between an earthwork and a bridge effect to the vehicle's running stability because support stiffness of the roadbed is suddenly changed. The design criteria for the transition structure on ballast track were not particular in the past. However with the introduction of concrete track is introduced, it requires there is a higher performance level required because of maintenance and running stability. In this present paper, a transition structure reinforced with geosynthetics is suggested to improve the performance of existing bridge-earthwork transition structures. The suggested transition structure, in which there is reinforcing of the approach block using high-tension geosynthetics, has a structure similar to that of earth reinforced abutments. The utilized backfill materials are cement treated soil and gravel. These materials are used to reduce water intrusion into the approach block and to increase the recycling of surplus earth materials. An experiment was performed under the same conditions in order to allow a comparison of this new structure with the existing transition structure. Evaluation items are elastic displacement, cumulative settlement, and earth pressure. As for the results of the real-scale accelerated testing, the suggested transition structure has excellent performance for the reduction of earth pressure and settlement. Above all, it has high resistance the variation of the water content.

References

  1. I.W. Lee, S.J. Lee, S.H. Lee, T.H. Kang (2010) Evaluation of deformation characteristics for bridge/earthwork transition reinforcement methods considering moving load, Journal of Korea Society for Railway, 13(3), pp. 298-303.
  2. K. Watanabe, M. Tateyama, T. Yonezawa, H. Aoki, et al. (2002) Shaking table tests on a new type bridge abutment with geogrid-reinforced cement treated backfill, Proc. of the 7th International Conference on Geosynthetics, Nice, Vol. 1, pp. 119-122.
  3. M.P. Burke (1987) Bridge approach pavements, integral bridges, and cycle-control joints, Transportation Research Record 1113, TRB, National Research Council, Washington D.C., pp. 54-65.
  4. F. Tatsuoka, M. Tateyama, J. Koseki (2012) GRS structures recently developed and constructed for railways and roads in Japan, Advances in Transportation Geotechnics II.
  5. F. Tatsuoka, et al. (2009) A new type of integral bridge comprising geosynthetic-reinforced soil walls, Geosynthetics International, 16(4), pp. 301-326. https://doi.org/10.1680/gein.2009.16.4.301
  6. Design standards and commentary of railway structures (2007) Ministry of Land, Infrastructure, Transport and Tourism Railway Bureau, Japan.
  7. Korea Rail Network Authority (2012) A study of reduction for trackbed stiffness on structure-earthwork transition zone, Research Report.
  8. Korea Rail Network Authority (2008) Design Guideline for Honam High-speed Line.
  9. S.J. Lee, I.W. Lee, J.W. Lee, J.S. Lee (2009) Long-term compression settlement of granular (rock/soil mixture) fill materials under concrete track, Journal of Korean Geotechnical Society, 25(8), pp. 95-106.
  10. S.J. Lee, I.W. Lee, E.S. Im, D.H. Shin, et al. (2008) Wettinginduced collapse in fill materials for concrete slab track of high speed railway, Journal of Korean Geotechnical Society, 24(4), pp. 79-88.
  11. J.Y. Wu (2004) The settlement behaviors of granular backfill materials for high speed rail embankment, Geotrans 2004, Los Angeles, pp. 1584-1591.

Cited by

  1. Assessement of Long Term Stability of Railway Bridge Abutment Using Geosynthetics Tube vol.15, pp.2, 2015, https://doi.org/10.9798/KOSHAM.2015.15.2.151