Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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Evaluation on Behavior Characteristics of a Pocketable Expansion Material for Ground Cavity Based on Wheel Tracking Test Results

휠트래킹 시험을 통한 포켓형 지반공동 긴급복구 팽창재료의 거동특성 평가

  • Park, Jeong-Jun (Incheon Disaster Prevention Research Center, Incheon National University) ;
  • Kim, Ju-Ho (UCI Tech Co. Ltd.) ;
  • Kim, Ki-Sung (UCI Tech Co. Ltd.) ;
  • Kim, Dongwook (Department of Civil and Environmental Engineering, Incheon National University) ;
  • Hong, Gigwon (Institute of Technology Research and Development, Korea Engineering & Construction)
  • Received : 2018.02.22
  • Accepted : 2018.03.08
  • Published : 2018.03.30
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Abstract

This paper described a results of dynamic stability by using wheel tracking test and unconfined compression test, in order to evaluate behavior characteristics on the developed pocketable expansion material for emergency restoration of ground cavity. The wheel tracking test result showed that the settlement increment ratio of the recovered ground by the expansion material was decreased compared to the sandy ground in high load condition. That is, it was confirmed that the expansion material was able to restrain the settlement due to the material stiffness, and the same results were obtained for the dynamic stability evaluation results. From the results of unconfined compression test, the pocketable expansion material was found to be able to fully support load on the restored cavity.

본 연구에서는 지반 내 공동에 대하여 긴급복구가 필요한 경우를 대상으로 개발된 포켓형 팽창재료의 거동특성을 분석하고자, 휠트래킹 시험을 통한 동적안정도 및 일축압축강도시험을 이용한 강도특성을 평가하였다. 휠트래킹 시험 결과, 높은 하중조건에서 포켓형 팽창재료로 복구된 지반은 모래지반에 비하여 침하량 증가율이 감소하였다. 즉, 포켓형 팽창재료는 재료의 강성으로 침하억제효과를 나타내는 것으로 확인되었으며, 이는 동적안정도 평가결과에서도 동일하게 나타났다. 휠트래킹 시험 전 후의 일축압축강도시험 결과로부터 공동 긴급복구용 포켓형 팽창재료는 복구된 지반 상부의 하중지지역할이 충분히 가능한 것으로 평가되었다.

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References

  1. ASTM (1985). Classification of soils for engineering purposes, D2487, West Conshohocken, PA.
  2. Bae, Y. S., Kim, K. T., and Lee, S. Y. (2017), "The Road Subsidence Status and Safety Improvement Plans", Journal of the Korea Academia-Industrial cooperation Society, Vol.18, No.1, pp.545-552. https://doi.org/10.5762/KAIS.2017.18.1.545
  3. Jeong, S. y., Karoui, T., Jeong, Y. H., and Kim, D. S. (2017), Experimental Study on Ground Subsidence and Underground Cavity Expansion under Various Conditions", Journal of engineering geology, Vol.27 No.2, pp.143-152. https://doi.org/10.9720/KSEG.2017.2.143
  4. Jung, C. G., (2017), Development of Prevention of Ground Collapse using Recharge Well Technology, Ph.D Thesis, University of Incheon, pp.25-27.
  5. Kim, S. L., Kim, T. H., Shin, D. C., and Kwon, H. H., (2009), "A Study on the Development of Rapidly Hardening Grouting Method for the Effective Filling in the Underground Cavity", Journal of Korean Society for Rock Mechanics, Vol.19, No.6, pp.534-544.
  6. Korea institute of geoscience and mineral resources (2014), Research on causes and policy suggestions by sinkhole type, Research report, pp.18-39.
  7. KS F 2374 (2017), Standard test method for wheel tracking of asphalt mixtures.
  8. KS F 4911 (2017), Waterproofing sheets of synthetic polymer.
  9. Lim, Y. J., Cho, H. J., and Jung, Y. N. (2015), "Analysis of Soil Stiffness Variation in Case of Cavity Generation in Underground below Subway Track using Light Weight Deflectometer", Journal of Korean Society of Hazard Mitigation, Vol.15, No.6, pp.87-99. https://doi.org/10.9798/KOSHAM.2015.15.6.87
  10. Lee, Y. S., Chung, H. I., and Park, S. K. (2008), "Characteristic of Strength for Temperature and Chemical Materials of Expansion Material," Proceedings of Korean Geo-Environmental Society, pp.333-336.
  11. Lee, Y. S., Park, S. G., Kim, K. S., Shin, E. C., and Oh, Y. I. (2007), "Characteristic of Chemical Resistance for mixed material as High Density Expansion Materials," Proceedings of Korean Environmental Engineers, pp. 418-418.
  12. Seoul City (2016), Road Collapse Management Comprehensive Countermeasures reporter briefing, Seoul City(in Korean).
  13. Shin, E. C. and Park, C. S. (2017), "An Experimental Study on Recharge Well Technology for Prevention of Ground Collapse", Journal of the Korean Geo-Environmental Society, Vol.18, No.5, pp.35-43.
  14. The Seoul Institue, (2016), The Road Subsidence Conditions and Safety Improvement Plans in Seoul, pp.6-19.
  15. Thiansky, A. B. (1999), Sinkholes, West-Central Florida, U.S. Geological Survey, Tempa, Florida, pp.121-140.
  16. You, S. K., Kim, J. B., Han, J. G., Hong, G. G., Yun, J. M. and Lee, K. I. (2017), "A Study on Simulation of Cavity and Relaxation Zone Using Finite Element Method," Journal of Korean Geosynthetics Society, Vol.16, No.4, pp.67-74. https://doi.org/10.12814/JKGSS.2017.16.4.067