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Soft Ground Improvement—Theoretical, Experimental, Numerical and Field Studies

  • Buddhima IndraratnaEmail author
  • Pankaj Baral
  • Cholachat Rujikiatkamjorn
  • Thanh Trung Nguyen
Chapter
Part of the Developments in Geotechnical Engineering book series (DGE)

Abstract

Much of the world’s essential infrastructure is built along congested coastal belts that are composed of weak, highly compressible and low permeable soils to significant depths. Soft alluvial and marine clay has very low bearing capacity and excessive settlement, properties which pose design and maintenance implications for tall structures, large commercial buildings, as well as port and transport infrastructure; these properties often hamper the development of transportation infrastructure including embankments. These very soft deposits must, therefore, be stabilised before constructing any infrastructure in order to prevent unacceptable differential settlement. Several ground improvement techniques to improve soft ground have been applied by different researches, of which Prefabricated Vertical Drains (PVDs) combined with surcharge and vacuum preloading is an efficient, cost-effective and popular technique to accelerate consolidation. This paper presents an overview of the theoretical, experimental and numerical developments of soft ground improvement via PVDs including natural fibre drains combined with surcharge and vacuum preloading, with applications to selected case studies.

Keywords

Soft soil PVDs Field studies Ground improvement 

Notes

Acknowledgements

The author would like to thank more than a dozen PhD students and research fellows who contributed to the field of soft ground improvement directly and indirectly during their time at UOW. The assistance from laboratory technicians Alan Grant, Cameron Neilson and Ritchie McLean during the laboratory and field work is also appreciated. The authors acknowledge the Australian Research Council (ARC) and Industry partners for providing support through the ARC Industrial Transformation Training Centre for Advanced Technologies in Rail Track Infrastructure (ITTC-Rail). The author would also like to acknowledge Australian Research Council (ARC) for providing funding to the research via several linkage projects in the field of soft ground improvement over the last two decades. Most of the contents produced in this paper are reproduced with kind permission from the Australian Geomechanics Journal (e.g. Author’s 2009 EH Davis Lecture), Journal of Geotechnical & Geoenvironmental Engineering ASCE, International Journal of Geomechanics, ASCE, Proceedings of the Institution of Civil Engineers – Ground Improvement, ASTM Geotechnical Testing Journal, Géotechnique and Canadian Geotechnical Journal among others.

References

  1. 1.
    Indraratna, B., Balasubramaniam, A.S., Balachandran, S.: Performance of test embankment constructed to failure on soft marine clay. J. Geotech. Eng. ASCE 118(1), 12–33 (1992)CrossRefGoogle Scholar
  2. 2.
    Indraratna, B., Rujikiatkamjorn, C., Adams, M., Ewers, B.: Class A prediction of the behaviour of soft estuarine soil foundation stabilised by short vertical drains beneath a rail track. J. Geotech. Geoenviron. Eng. ASCE 136(5), 686–696 (2010)CrossRefGoogle Scholar
  3. 3.
    Johnson, S.J.: Precompression for improving foundation soils. J. Soil Mech. Foundat. Div. ASCE 1, 111–114 (1970)Google Scholar
  4. 4.
    Carrillo, N.: Simple two and three dimensional case in the theory of consolidation of soils. Stud. Appl. Math. 21(1–4), 1–5 (1942)Google Scholar
  5. 5.
    Barron, R.A.: Consolidation of fine-grained soils by drain wells. Trans. ASCE 113, 718–754 (1948)Google Scholar
  6. 6.
    Akagi, T.: Consolidation caused by mandrel-driven sand drains. In: Proceedings of the 6th Asian Regional Conference on Soil Mechanics and Foundation Engineering, Singapore, Southeast Asian Geotechnical Society, Bangkok, vol. 1, pp. 125–128 (1979)Google Scholar
  7. 7.
    Hansbo, S.: Consolidation of clay by band-shaped pre-fabricated drains. Ground Eng. 12(5), 16–25 (1979)Google Scholar
  8. 8.
    Hansbo, S.: Consolidation of fine-grained soils by prefabricated drains and lime column installation. In: Proceedings of 10th International Conference on Soil Mechanics and Foundation Engineering, Stockholm, A.A. Balkema, Rotterdam, The Netherlands, vol. 3, pp. 677–682 (1981)Google Scholar
  9. 9.
    Hansbo, S.: Aspects of vertical drain design: Darcian or non-Darcian flow. Géotechnique 47(5), 983–992 (1997)CrossRefGoogle Scholar
  10. 10.
    Onoue, A.: Consolidation by vertical drains taking well resistance and smear into consideration. Soils Found. 28(4), 165–174 (1988)CrossRefGoogle Scholar
  11. 11.
    Zeng, G.X., Xie, K.H.: New development of the vertical drain theories. In: Proceedings of 12th ICSMFE. Rio de Janeiro, pp. 1435–1438 (1989)Google Scholar
  12. 12.
    Indraratna, B., Redana, I.W.: Laboratory determination of smear zone due to vertical drain installation. J. Geotech. Eng. ASCE 125(1), 96–99 (1998)Google Scholar
  13. 13.
    Indraratna, B., Redana, I.W.: Numerical modeling of vertical drains with smear and well resistance installed in soft clay. Can. Geotech. J. 37, 132–145 (2000)CrossRefGoogle Scholar
  14. 14.
    Mohamedelhassan, E., Shang, J.Q.: Vacuum and surcharge combined one-dimensional consolidation of clay soils. Can. Geotech. J. 39, 1126–1138 (2002)CrossRefGoogle Scholar
  15. 15.
    Indraratna, B., Bamunawita, C., Khabbaz, H.: Numerical modeling of vacuum preloading and field applications. Can. Geotech. J. 41, 1098–1110 (2004)CrossRefGoogle Scholar
  16. 16.
    Bo, M.W., Chu, J., Low, B.K., Cho, V.: Soil improvement; prefabricated vertical drain techniques. Thomson Learning, Singapore (2003)Google Scholar
  17. 17.
    Indraratna, B., Rujikiatkamjorn, C., Sathananthan, I.: Analytical and numerical solutions for a single vertical drain including the effects of vacuum preloading. Can. Geotech. J. 42, 994–1014 (2005)CrossRefGoogle Scholar
  18. 18.
    Walker, R., Indraratna, B.: Vertical drain consolidation with overlapping smear zones. Geotechnique 57(5), 463–467 (2007)CrossRefGoogle Scholar
  19. 19.
    Indraratna, B., Zhong, R., Fox, P., Rujikiatkamjorn, C.: Large-strain vacuum-assisted consolidation with non-darcian radial flow incorporating varying permeability and compressibility. J. Geotech. Geoenviron. Eng. 04016088.  https://doi.org/10.1061/(asce)gt.1943-5606.0001599 (2016)CrossRefGoogle Scholar
  20. 20.
    Hansbo, S.: Consolidation equation valid for both darcian and non-darcian flow. Geotechnique 51, 51–54 (2001)CrossRefGoogle Scholar
  21. 21.
    Yin, J.H., Graham, J.: Viscous-elastic-plastic modelling of one-dimensional time-dependent behaviour. Can. Geotech. J. 26(2), 199–209 (1989)CrossRefGoogle Scholar
  22. 22.
    Indraratna, B., Baral, P., Rujikiatkamjorn, C., Perera, D.: Class A and C predictions for Ballina trial embankment with vertical drains using standard test data from industry and large diameter specimens. Comput. Geotech. 93, 232–246 (2018)CrossRefGoogle Scholar
  23. 23.
    Lambe, T.W.: Predictions in soil engineering. Geotechnique 23, 149–202 (1973)CrossRefGoogle Scholar
  24. 24.
    Kianfar, K., Indraratna, B., Rujikiatkamjorn, C.: Radial consolidation model incorporating the effects of vacuum preloading and non-darcian flow 63, 1060–1073 (2013)Google Scholar
  25. 25.
    Perera, D., Indraratna, B., Leroueil, S., Rujikiatkamjorn, C., Kelly, R.: An analytical model for vacuum consolidation incorporating soil disturbance caused by mandrel-driven drains. Can. Geotech. J. (2016)Google Scholar
  26. 26.
    Lee, S.L., Ramaswamy, S.D., Aziz, M.A., Das Gupta, N.C., Karunaratne, G.P.: Fibredrain for consolidation of soft soils. In: Proceedings of the post- vienna conference on geotextiles, Singapore, vol. 2, pp. 238–258 (1987)Google Scholar
  27. 27.
    Jang, Y.S., Kim, Y.W., Park, J.Y.: Consolidation efficiency of natural and plastic geosynthetic band drains. Geosynt. Int. 8(4), 283 (2001)CrossRefGoogle Scholar
  28. 28.
    Asha, B.S., Mandal, J.N.: Absorption and discharge capacity tests on natural prefabricated vertical drains. Geosynth. Int. 19, 263–271 (2012)CrossRefGoogle Scholar
  29. 29.
    Nguyen, T.T., Indraratna, B., Carter, J.: Laboratory investigation into biodegradation of jute drains with implications for field behaviour. J. Geotech. Geoenviron. Eng. 144(6), 0401802-1:15CrossRefGoogle Scholar
  30. 30.
    Indraratna, B., Nguyen, T.T., Carter, J., Rujikiatkamjorn, C.: Influence of biodegradable natural fibre drains on the radial consolidation of soft soil. Comput. Geotech. 78, 171–180 (2016)CrossRefGoogle Scholar
  31. 31.
    Bergado, D.T., Asakami, H., Alfaro, M.C., Balasubramaniam, A.S.: Smear effects of vertical drains on soft bangkok clay. J. Geotech. Eng. ASCE 117, 1509–1530 (1991)Google Scholar
  32. 32.
    Onoue, A., Ting, N.H., Germaine, J.T., Whitman, R.V.: Permeability of disturbed zone around vertical drains. Proc, pp. 879–890. ASCE Geotech. Enggr. Congress, Colorado (1991)Google Scholar
  33. 33.
    Almeida, M.S.S., Ferreira, C.A.M.: Field in situ and laboratory consolidation parameters of a very soft clay, predictive soil mechanics. In: Proceedings of the Worth Memorial Symposium, London. Thomas Telford, pp. 73–93 (1993)Google Scholar
  34. 34.
    Chai, J.C., Miura, N.: Investigation of factors affecting vertical drain behavior. J. Geotech. Geoenviron. Eng. 125, 216–226 (1999)CrossRefGoogle Scholar
  35. 35.
    Hird, C.C., Moseley, V.J.: Model study of seepage in smear zones around vertical drains in layered soil. Geotechnique 50, 89–97 (2000)CrossRefGoogle Scholar
  36. 36.
    Sharma, J.S., Xiao, D.: Characteristics of a smear zone around vertical drains by large-scale laboratory tests. Can. Geotech. J. 37, 1265–1271 (2000)CrossRefGoogle Scholar
  37. 37.
    Indraratna, B., Perera, D., Rujikiatkamjorn, C., Kelly, R.: Soil disturbance analysis due to vertical drain installation. Proc. Institut. Civil Eng. Geotech. Eng. 168, 236–246 (2015)CrossRefGoogle Scholar
  38. 38.
    Baral, P., Rujikiatkamjorn, C., Indraratna, B., Kelly, R.: Radial consolidation characteristics of soft undisturbed clay based on large specimens. J. Rock Mech. Geotech. Eng.  https://doi.org/10.1016/j.jrmge.2018.06.002 (2018)CrossRefGoogle Scholar
  39. 39.
    Sathananthan, I., Indraratna, B.: Laboratory evaluation of smear zone and correlation between permeability and moisture content. J. Geotech. Geoenviron. Eng. 132, 942–945 (2006)CrossRefGoogle Scholar
  40. 40.
    Indraratna, B., Attya, A., Rujikiatkamjorn, C.: Experimental investigation on effectiveness of a vertical drain under cyclic loads. J. Geotech. Geoenviron. Eng. ASCE 135(6), 835–839 (2009)CrossRefGoogle Scholar
  41. 41.
    Hird, C.C., Pyrah, I.C., Russell, D., Cinicioglu, F.: Modelling the effect of vertical drains in two-dimensional finite element analyses of embankments on soft ground. Can. Geotech. J. 32, 795–807 (1995)CrossRefGoogle Scholar
  42. 42.
    Gabr, M.A., Szabo, D.J.: Prefabricated vertical drains zone of influence under vacuum in clayey soil. In Conference on In Situ Remediation of the Geoenvironment, ASCE, pp 449–460 (1997)Google Scholar
  43. 43.
    Hird, C.C., Pyrah, I.C., Russel, D.: Finite element modeling of vertical drains beneath embankments on soft ground. Geotechnique 42(3), 499–511 (1992)CrossRefGoogle Scholar
  44. 44.
    Indraratna, B.: 2009 EH Davis Memorial Lecture: Recent advances in the application of vertical drains and vacuum preloading in soft soil stabilization. Australian Geomech. J. AGS 45(2), 1–43 (2010)Google Scholar
  45. 45.
    Indraratna, B., Rujikiatkamjorn, C., Kelly, R., Buys, H.: Soft soil foundation improved by vacuum and surcharge loading. Proc. ICE Ground Improv 165, 87–96 (2012)CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Centre for Geomechanics and Railway Engineering (GRE), University of WollongongWollongongAustralia

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