Geomechanics and Engineering

  • 제18권1호
  • /
  • Pages.59-69
  • /
  • 2019
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Groutability enhancement by oscillatory grout injection: Verification by field tests

  • Kim, Byung-Kyu (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Lee, In-Mo (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Kim, Tae-Hwan (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Jung, Jee-Hee (School of Civil, Environmental and Architectural Engineering, Korea University)
  • 투고 : 2019.01.15
  • 심사 : 2019.04.23
  • 발행 : 2019.05.20
⟨ 이전 논문 다음 논문 ⟩

초록

Grout injection is mainly used for permeability reduction and/or improvement of the ground by injecting grout material into pores, cracks, and joints in the ground. The oscillatory grout injection method was developed to enhance the grout penetration. In order to verify the level of enhancement of the grout, field grout injection tests, both static and oscillatory tests, were performed at three job sites. The enhancement in the permeability reduction and ground improvement effect was verified by performing a core boring, borehole image processing analysis, phenolphthalein test, scanning electron microscopy analysis, variable heat test, Lugeon test, standard penetration test, and an elastic wave test. The oscillatory grout injection increased the joint filling rate by 80% more and decreased the permeability coefficient by 33-68%, more compared to the static grout injection method. The constrained modulus of the jointed rock mass was increased by 50% more with oscillatory grout injection compared to the static grout injection, indicating that the oscillatory injection was more effective in enhancing the stiffness of the rock mass.

키워드

참고문헌

  1. ASTM (American Society for Testing and Materials) (2018), Standard Test Method for Determining Transmissivity and Storativity of Low Permeability Rocks by in situ Measurements using Pressure Pulse Technique, ASTM D4631-18, ASTM International, West Conshohocken, Pennsylvania, U.S.A.
  2. Batchelor, G.F. (1967), An Introduction to Fluid Dynamics, Cambridge University Press, Cambridge, U.K.
  3. Byle, M.J. and Borden, R.H. (1995), "Verification of geotechnical grouting", Geotechnical Special Publication, No.57, ASCE Committee on Grouting, 1-77.
  4. Chang, M., Mao, T.W. and Huang, R.C. (2016), "A study on the improvements of geotechnical properties of in-situ soils by grouting", Geomech. Eng., 10(4), 527-546. https://doi.org/10.12989/gae.2016.10.4.527.
  5. Choi, M.S., Kim, Y.S. and Kim, Y.U. (2016), "Effect of ultrasound on the formation of a lubrication layer in concrete pumping", J. Adv. Concr. Technol., 14(3), 95-101. https://doi.org/10.3151/jact.14.95.
  6. Date, K., Wakita, S., Yamamoto, T., Nakashima, Y., Hoshino, Y., Aoki, K. and Mito, Y. (2003), "Development of dynamic grouting technique for the ground improvement", Proceedings of the ITA World Tunnelling Congress 2003: (RE)Claiming the Underground Space, Amsterdam, The Netherlands.
  7. Fattah, M.Y., Al-Saidi, A.A. and Jaber, M.M. (2015), "Improvement of bearing capacity of footing on soft clay grouted with lime-silica fume mix", Geomech. Eng., 8(1), 113-132. https://doi.org/10.12989/gae.2015.8.1.113.
  8. Goodman, R.E. (1976), Methods of Geological Engineering in Discontinuous Rocks, West Publishing, New York, U.S.A.
  9. Kim, B.K., Lee, I.M, Chung, H.Y., and Ryu, Y.M. (2018b), "Groutability enhancement effect of oscillatory grout injection: Theoretical assessment", Geomech. Eng., under review.
  10. Kim, B.K., Park, J.J., Kwon, Y.S., Jung, K.B. and Lee, I.M. (2018a), "Groutability enhancement by oscillatory injection in cement-based permeation grouting", Geotech. Test. J. https://doi.org/10.1520/GTJ20170036. ISSN 0149-6115.
  11. Kim, J.S., Lee, I.M., Jang, J.H. and Choi, H.S. (2009), "Groutability of cement-based grout with consideration of viscosity and filtration phenomenon", Int. J. Numer. Anal. Meth. Geomech., 33(16), 1771-1797. https://doi.org/10.1002/nag.785.
  12. Mohammed, H.M., Pusch, R. and Knutsson, S. (2015), "Study of cement-grout penetration into fractures under static and oscillatory conditions", Tunn. Undergr. Sp. Technol., 45, 10-19. https://doi.org/10.1016/j.tust.2014.08.003.
  13. Poinot, T., Benyahia, K., Govin, A., Jeanmaire, T., and Grosseau, P. (2013), "Use of ultrasonic degradation to study the molecular weight influence of polymetric admixtures for mortars", Constr. Build. Mater., 47, 1046-1052. https://doi.org/10.1016/j.conbuildmat.2013.06.007.
  14. Shin, E.C., Shin, H.S., and Ryu, B.H. (2012), "Effect of vibration on infiltration grouting using cylindricality device", Proceedings of the Korean Geo-Environmental Society Conference, Seoul, Korea.
  15. Shin, J.H., Moon, J.H., Song, Y.K., and Kim, Y.U. (2015), "Ultrasonically enhanced physical properties of cement grout", KSCE J. Civ. Eng., 19(6), 1693-1696. https://doi.org/10.1007/s12205-015-1267-2.
  16. Zheng, G., Zhang, X., Diao, Y. and Lei, H. (2016), "Experimental study on the performance of compensation grouting in structured soil", Geomech. Eng., 10(3), 335-355. https://doi.org/10.12989/gae.2016.10.3.335.