지질공학 (The Journal of Engineering Geology)

  • 제26권4호
  • /
  • Pages.497-503
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  • 2016
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  • 1226-5268(pISSN)
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  • 2287-7169(eISSN)
대한지질공학회 (The Korean Society of Engineering Geology)
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CGVM 공법을 이용한 지반개량 효과 검증

Assessment of Ground Improvement Achieved using the Cement Grouting by Vibration Method

  • Kim, Jong-Tae (River Experiment Center, Korea Institute of Civil Engineering and Building Technology) ;
  • Choi, Young-Jun (Samsoo Development Co.) ;
  • Jeong, Gyo-Cheol (Dept. of Earth and Environmental Sciences, Andong National University)
  • 투고 : 2016.11.28
  • 심사 : 2016.12.16
  • 발행 : 2016.12.30
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초록

가진발생장치를 이용한 시멘트 주입공법(CGVM)은 국내에서 개발된 건설 신기술로써 가진된 주입재가 대상지반으로 주입되어 지반보강 효율을 증대시키는 기술이다. 따라서 본 연구에서는 CGVM 공법의 현장적용 및 시공효과를 검증하는 것이 목적으로써 2개의 연구지역을 선정한 후 시공 전 후에 대해 표준관입시험과 현장투수시험 및 지구물리탐사 결과를 비교하였다. 표준관입시험을 통한 시공 전 후 비교 결과 N 값이 33.57~60.90% 증가된 것으로 나타났으며 현장투수시험의 경우 시공 후 투수계수가 감소된 것으로 보아 차수효과 및 저수지 제체의 안정성 증대 등을 기대할 수 있을 것으로 판단된다. 또한 전기비저항탐사 결과 시공 전에 비해 누수로 인한 저비저항대가 관찰되지 않아 그라우팅 효과가 매우 뛰어난 것으로 나타났다.

The cement grouting by vibration method (CGVM), a new construction technology developed in Korea, aims to efficiently reinforce a target ground area by injecting vibrated grout into it. The present study applies the CGVM to test sites and verifies its effect. Standard penetration tests (SPTs), field permeability tests, and geophysical surveys were conducted in two study areas, and the results were compared between before and after CGVM application. The SPT conducted before and after the CGVM application showed that the N value was increased by 33.57% point to 60.90% point. The field permeability test showed that the permeability coefficient decreased. These results indicate that CGVM may increase imperviousness and improve reservoir system stability. In addition, a resistivity survey found no low-resistivity zone, unlike before the CGVM application, thereby indicating the excellent grouting effect of the CGVM.

키워드

참고문헌

  1. Aggelis, D. G., Polyzos, D., and Philippidis, T. P., 2005, Wave dispersion and attenuation in fresh mortar: theoretical predictions vs. experimental results, Journal of the Mechanics and Physics of Solids, 53(4), 857-883. https://doi.org/10.1016/j.jmps.2004.11.005
  2. Choi, Y. J., Kim, J. T., and Jeong, G. C., 2016, Analysis on the effect of CGVM, Proceedings of KSEG 2016 Spring Conference, 79-80 (in Korean).
  3. El Tani, M., 2012, Grouting Rock Fractures with Cement Grout, Journal of Rock Mechanics and Rock Engineering, 45(4), 547-561. https://doi.org/10.1007/s00603-012-0235-0
  4. Han, S. H., Yea, G. G., and Kim, H. Y., 2014, Improvement Effects of Cement Grouting using Vibration Method through a Field Test, Journal of the Korean Geoenvironmental Society, 15(5), 23-29 (in Korean with English abstract). https://doi.org/10.14481/JKGES.2014.15.5.23
  5. Hong, S. H. and Lee, B. J., 1982, Explanatory text of the geological map of DunJeon sheet, Korea Institute of Energy and Resources, 2-10 (in Korean).
  6. Kim, K. W. and Park, Y. C., 1964, Explanatory text of the geological map of ChongDo sheet, Geological Survey of Korea, 4-12 (in Korean).
  7. Korean Geo-Environmental Society, 2013, Cement grouting by vibration method, Geoenvironmental Engineering, 14(4), 79-85 (in Korean with English abstract).
  8. Lee, M. S., Kim, J. S., Lee, S. D., Choi, Y. J., Yang, J. M., and Lee, I. M., 2010, Effect of vibratory injection on grout permeation characteristics, Journal of Korean Geotechnical Society, 26(7), 37-47 (in Korean with English abstract).
  9. Samsoo Development Co., Sambu Construction Co., and Dong Myeong Engineering Co., 2012, New excellent technology 2nd examination presentation materials : cement grouting by vibration method, 45p (in Korean).
  10. Seo, M. B., Kwon, S. H., and Lee, B. J., 2015, Improvement of Grouting by Short-period Vibration Energy, Journal of the Korean Geoenvironmental Society, 16(7), 35-42 (in Korean with English abstract). https://doi.org/10.14481/jkges.2015.16.7.35
  11. Shiotani, T., Momoki, S., Chai, H., and Aggelis, D. G., 2009, Elastic wave validation of large concrete structures repaired by means of cement grouting, Construction and Building Materials, 23(7), 2647-2652. https://doi.org/10.1016/j.conbuildmat.2009.01.005
  12. Stille, B., Stille, H., Gustafson, G., and Kobayashi, S., 2009, Experience with the real time grouting control method, Geomech Tunnelling, 2(5), 447-459. https://doi.org/10.1002/geot.200900036
  13. Yea, G. G., Kim, G. S., Choi, Y. J., and Yang, J. M., 2010, A study on improvement of Infiltration Grouting using cement grouting by vibration method, Proceedings of Korean Geo- Environmental Society, 39-47 (in Korean).
  14. Yu, J., 2014, Evaluation of permeating effect for dynamic grouting by model test and artificial neural network, Ph.D. Thesis, Incheon National University, 101p (in Korean).
  15. Zebovitz, S., Krizek, R. J., and Atmatzidis, D. K., 1989, Injection of fine sands with very fine cement grout, Journal of Geotech. Engrg., 115(12), 1717-1733. https://doi.org/10.1061/(ASCE)0733-9410(1989)115:12(1717)