Geomechanics and Engineering

  • 제6권4호
  • /
  • Pages.377-389
  • /
  • 2014
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Vacuum distribution with depth in vertical drains and soil during preloading

  • Khan, Abdul Qudoos (National University of Sciences and Technology) ;
  • Mesri, G. (University of Illinois at Urbana-Champaign)
  • 투고 : 2012.09.25
  • 심사 : 2013.12.04
  • 발행 : 2014.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

The vacuum consolidation method which was proposed by Kjellman in 1952 has been studied extensively and used successfully since early 1980 throughout the world, especially in East and Southeast Asia. Despite the increased successful use, different opinions still exist, especially in connection to distribution of vacuum with depth and time in vertical drains and in soil during preloading of soft ground. Porewater pressure measurements from actual cases of field vacuum and vacuum-fill preloading as well as laboratory studies have been examined. It is concluded that (a) a vacuum magnitude equal to that in the drainage blanket remains constant with depth and time within the vertical drains, (b) as expected, vacuum does not develop at the same rate within the soil at different depths; however, under ideal conditions vacuum is expected to become constant with depth in soil after the end of primary consolidation, and (c) there exists a possibility of internal leakage in vacuum intensity at some sublayers of a soft clay and silt deposit. A case history of vacuum loading with sufficient subsurface information is analyzed using the ILLICON procedure.

키워드

참고문헌

  1. Bamunawita, C. (2004), "Soft clay foundation improvement via prefabricated vertical drains and vacuum preloading", Ph.D. Thesis, University of Wollongong, Australia.
  2. Berthier, D., Boyle, P., Ameratunga, J., Bok, C.D. and Vincent, P. (2009), "A successful trial of vacuum consolidation at the port of Brisbane", Coasts and Ports Conference: In a Dynamic Environment, Wellington, New Zealand, March, pp. 640-647.
  3. Chai, J.C., Carter, J.P. and Hayashi, S. (2005a), "Ground deformation induced by vacuum consolidation", J. Geotech. Geoenviron. Eng., ASCE, 1552-1561.
  4. Chai, J.C., Hayashi, S. and Carter, J.P. (2005b), "Characteristics of vacuum consolidation", Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering, International Society for Soil Mechanics and Geotechnical Engineering and the Japanese Geotechnical Society, Osaka, Japan, pp. 1167-1170.
  5. Chai, J.C., Matsunaga, K., Sakai, A. and Hayashi, S. (2009), "Comparison of vacuum consolidation with surcharge load induced consolidation of a two-layer system", Geotechnique, 59(7), 637-641. https://doi.org/10.1680/geot.8.T.020
  6. Chu, J. and Yan, S.W. (2005). "Estimation of degree of consolidation for vacuum preloading projects", Int. J. Geomech., ASCE, 158-165.
  7. Chu, J., Yan, S.W. and Zheng, Y.R. (2006), "Three soil improvement methods and their application to road construction", Ground Improv., 10(3), 103-112. https://doi.org/10.1680/grim.2006.10.3.103
  8. Indraratna, B., Bamunawita, C. and Khakbaz, H. (2004), "Numerical modeling of vacuum preloading and field applications", Can. Geotech. J., 41(5), 1098-1110. https://doi.org/10.1139/t04-054
  9. Indraratna, B., Sathananthan, I., Bamunawita, C. and Balasubramanium, A.S. (2005), "Theoretical and numerical perspectives of field observations for the design and performance evaluation of embankment constructed on soft marine clay", University of Wollongong, Australia.
  10. Kjellman, W. (1952), "Consolidation of clay soil by means of atmospheric pressure", Proceedings of the Conference on Soil Stabilization, MIT, Cambridge, MA, USA, June, pp. 258-263.
  11. Khan, A.Q. (2010), "Ground improvement using vacuum preloading together with prefabricated vertical drains", Ph.D. Thesis, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
  12. Mesri, G. and Khan, A.Q. (2010), "Interpretation of vacuum preloading using ILLICON methodology", International Conference on Geotechnical Engeeneering, Lahore, Pakistan, November, pp. 27-36.
  13. Mesri, G. and Khan, A.Q. (2011), "Increase in shear strength due to vacuum preloading", Proceedings of the 2011 Pan-Am CGS Geotech Conference, Toronto, Canada, January.
  14. Mesri, G. and Khan, A.Q. (2012), "Ground improvement using vacuum loading together with vertical drains", J. Geotech. Geoenviron. Eng., ASCE, 138(6), 1-10. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000546
  15. Rujikiatkamjorn, C. (2005), "Analytical and numerical modeling of soft clay foundation improvement via prefabricated vertical drains and vacuum preloading", Ph.D. Thesis, University of Wollongong, Australia.
  16. 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
  17. Yan, S.W. and Chu, J. (2003), "Soil improvement for a road using the vacuum preloading method", Ground Improv., 7(4), 165-172. https://doi.org/10.1680/grim.2003.7.4.165
  18. Yan, S.W. and Chu, J. (2005). "Soil improvement for a storage yard using the combined vacuum and fill preloading method", Can. Geotech. J., 42(4), 1094-1104. https://doi.org/10.1139/t05-042

피인용 문헌

  1. Laboratory investigation of axisymmetric single vacuum well point vol.23, pp.3, 2016, https://doi.org/10.1007/s11771-016-3120-2
  2. Experimental tests on effect of deformed prefabricated vertical drains in dredged soil on consolidation via vacuum preloading vol.222, 2017, https://doi.org/10.1016/j.enggeo.2017.03.020
  3. Effect of pressurization positions on the consolidation of dredged slurry in air-booster vacuum preloading method pp.1521-0618, 2019, https://doi.org/10.1080/1064119X.2018.1563252
  4. Consolidation Effect of Prefabricated Vertical Drains with Different Lengths for Soft Subsoil under Vacuum Preloading vol.2019, pp.None, 2019, https://doi.org/10.1155/2019/7428595
  5. Field instrumentation and settlement prediction of ground treated with straight-line vacuum preloading vol.19, pp.5, 2019, https://doi.org/10.12989/gae.2019.19.5.447
  6. Improving consolidation of dredged slurry by vacuum preloading using prefabricated vertical drains (PVDs) with varying filter pore sizes vol.57, pp.2, 2014, https://doi.org/10.1139/cgj-2018-0572
  7. Shallow ground treatment by a combined air booster and straight-line vacuum preloading method: A case study vol.24, pp.2, 2014, https://doi.org/10.12989/gae.2021.24.2.129
  8. Vacuum formation and negative pressure transmission under a self-starting drainage process vol.54, pp.1, 2014, https://doi.org/10.1144/qjegh2019-129
  9. Improved Vacuum Preloading Method Combined with Sand Sandwich Structure for Consolidation of Dredged Clay-Slurry Fill and Original Marine Soft Clay vol.21, pp.10, 2014, https://doi.org/10.1061/(asce)gm.1943-5622.0002123