Geomechanics and Engineering

  • 제6권5호
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  • Pages.419-436
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  • 2014
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Improvement of soft clay at a site in the Mekong Delta by vacuum preloading

  • Quang, N.D. (Geotechnical & Earth Resources Engineering, Asian Institute of Technology) ;
  • Giao, P.H. (Geotechnical & Earth Resources Engineering, Asian Institute of Technology)
  • 투고 : 2012.07.23
  • 심사 : 2013.11.28
  • 발행 : 2014.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

Soil improvement by preloading with PVD in combination with vacuum is helpful when a considerable load is required to meet the desired rate of settlement in a relative short time. To facilitate the vacuum propagation, vertical drains are usually employed in conjunction. This ground improvement method is more and more applied in the Mekong delta of Vietnam to meet the needs of fast infrastructure development. This paper reports on a pilot test that was carried out to investigate the effect of ground improvement by vacuum and PVD on the rate of consolidation at the site of Saigon International Terminals Vietnam (SITV) in Ba Ria-Vung Tau Province, Viet Nam. Three main aspects of the test will be presented, and namely, instrumentation and field monitoring program, calculation of consolidation settlement and back-analysis of soil properties to see the difference before and after ground improvement.

키워드

참고문헌

  1. Aboshi, H. and Monden, H. (1963), "Determination of the horizontal coefficient of consolidation of an lluvial clay", Proceedings of the 4th Australian-New Zealand Conference, SMFE, pp. 159-164.
  2. Asaoka, A. (1978), "Observational procedure of settlement prediction", Soil. Found., 18(4), 87-101. https://doi.org/10.3208/sandf1972.18.4_87
  3. Barron, R.A. (1948), "Consolidation of fined-grained soils by drain wells", Transactions of American Society for Civil Engineers, 113(2346), 718-724.
  4. Baligh, M.M. and Levadoux, J.M. (1986), "Consolidation after undrained piezocone penetration. II: Interpretation", J. Geotech. Eng., ASCE, 112(7), 727-745. https://doi.org/10.1061/(ASCE)0733-9410(1986)112:7(727)
  5. Bergado, D.T., Chai, J.C., Miura, N. and Balasubramaniam, A.S. (1998), "PVD improvement of soft Bangkok clay with combined vacuum and reduced sand embankment preloading", J. Geotech. Eng., Southeast Asian Geotech. Soc., 29(1), 95-122.
  6. Bergado, D.T., Balasubramaniam, A.S., Fannin, R.J. and Holtz, R.D. (2002), "Prefabricated vertical drains in soft Bangkok clay: A case study of the new Bangkok International Airport project", Can. Geotech. J., 18(39), 304-315.
  7. Carrilo, N. (1942), "Simple two and three-dimensional cases in the theory of consolidation of soils", J. Math. Phys., 21, 1-5. https://doi.org/10.1002/sapm19422111
  8. Crawford, C.B., Fannin, R.J., deBoer, L.J. and Kern, C.B. (1992), "Experiences with prefabricated vertical (wick) drains at Vernon", Can. Geotech. J., 29(1), 67-79. https://doi.org/10.1139/t92-008
  9. Cao, L.F., Chang, M.F., Teh, C.I. and Na, Y.M. (2001), "Back-calculation of the consolidation parameters from field measurements at a reclamation site", Can. Geotech. J., 38(4), 755-769. https://doi.org/10.1139/t01-013
  10. Chai, J.C. and Miura, N. (1999), "Investigation of factors affecting vertical drain behavior", J. Geotech. Geoenviron. Eng., ASCE, 125(3), 216-226. https://doi.org/10.1061/(ASCE)1090-0241(1999)125:3(216)
  11. Chu, J., Yan, W. and Yang, H. (2000), "Soil improvement by the vacuum preloading method for an oil storage station", Geotechnique, 50(6), 625-632. https://doi.org/10.1680/geot.2000.50.6.625
  12. Chu, J. and Yan, S.W. (2005), "Estimation of degree of consolidation for vacuum preloading projects", Int. J. Geomech., ASCE, 5(2), 158-165. https://doi.org/10.1061/(ASCE)1532-3641(2005)5:2(158)
  13. Chai, J.C., Carter, J.P. and Hayashi, S. (2006), "Vacuum consolidation and its combination with embankment loading" Can. Geotech. J., 43(10), 985-996. https://doi.org/10.1139/t06-056
  14. Chai, J.-C., Hong, Z.-S. and Shen, S.-L. (2010), "Vacuum-drain consolidation induced pressure distribution and ground deformation", Geotext. Geomembr., 28(6), 525-535. https://doi.org/10.1016/j.geotexmem.2010.01.003
  15. Giao, P.H., Dung, N.T. and Long, P.V. (2008), "An integrated geotechnical-geophysical investigation of soft clay at a coastal site in the Mekong Delta for oil and gas infrastructure development", Can. Geotech. J., 11(45), 1525-1537.
  16. Hansbo, S. (1979), "Consolidation of clay by band shaped prefabricated drains", Ground Eng., 12(5), 16-25.
  17. Hansbo, S. (1981), "Consolidation of fine-grained soils by prefabricated drains", Proceedings of the 10th International Conference Soil Mechanic and Foundation Engineering, Stockholm, Volume 3, pp. 677-682.
  18. Holtz, R.D., Jamiolkowski, M., Lancellotta, R. and Pedroni, S. (1991), "Prefabricated vertical drains: design and performance", CIRIA ground engineering report: Ground improvement, Butterworth-Heinemann Ltd., UK.
  19. Hansbo, S. (1997), "Aspects of vertical drain design: Darcian or non-Darcian flow", Geotechnique, 47(5), 983-992. https://doi.org/10.1680/geot.1997.47.5.983
  20. Kjellman, W. (1948), "Accelerating consolidation of fine grain soils by means of cardboard wicks", Proceedings of the 2nd ICSMFE, Volume 2, pp. 302-305.
  21. Ladd, C.C. (1991), "Stability evaluation during staged construction", J. Geotech. Eng. Div., ASCE, 117(4), 540-615. https://doi.org/10.1061/(ASCE)0733-9410(1991)117:4(540)
  22. Magnan, J.P. and Deroy, J.M. (1980), "Analyses graphic des courbes de consolidation oedometrique", Bull. Liason Lab. Ponts et Chausees, Paris, France, 9, 53-56.
  23. Mikasa, M. (1965), "The consolidation of soft clay", Civil Engineering in Japan, Japan Society of Civil Engineers, Tokyo, pp. 21-26.
  24. Shang, J.Q., Tang, M. and Miao, Z. (1998), "Vacuum preloading consolidation of reclaimed land: A case study", Can. Geotech. J., 35(5), 740-749. https://doi.org/10.1139/t98-039
  25. Seah, T.H. (2006), "Design and construction of ground improvement works at Suvarnabhumi Airport", J. Geotech. Eng., The Southeast Asian Geotech. Soc., 171-188.
  26. Sridharan, A. and Rao, A.S. (1981), "Rectangular hyperbola fitting method for one dimensional consolidation", Geotech. Test. J., 4(4), 161-168. https://doi.org/10.1520/GTJ10785J
  27. Stamatopoulos, A.C. and Kotzias, P.C. (1985), Soil Improvement by Preloading, John Wiley & Sons, New York, pp. 155-167.
  28. Tan, S.A. and Chew, S.H. (1996), "Comparison of the hyperbolic and Asaoka observation method of monitoring consolidation with vertical drains", Soil. Found., 36(3), 31-43. https://doi.org/10.3208/sandf.36.3_31
  29. Tang, M. and Shang, J.Q. (2000), "Vacuum preloading consolidation of Yaoqiang Airport runway", Geotechnique, 50(6), 613-623. https://doi.org/10.1680/geot.2000.50.6.613

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  6. Analysis of the Effectiveness of the Step Vacuum Preloading Method: A Case Study on High Clay Content Dredger Fill in Tianjin, China vol.8, pp.1, 2014, https://doi.org/10.3390/jmse8010038
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  9. Clogging effect of prefabricated horizontal drains in dredged soil by air booster vacuum consolidation vol.49, pp.6, 2021, https://doi.org/10.1016/j.geotexmem.2021.07.002