Browse > Article
http://dx.doi.org/10.5394/KINPR.2009.33.2.119

Effect of PBD to improve soft marine sedimentary ground  

Jeong, Jin-Seob (Department of Civil, Environmental and Urban Engineering, Wonkwang University)
Hwang, Woong-Ki (Department of Civil and Environmental Engineering, Korea Maritime University)
Jeong, Choong-Gi (Samsung Engineering and Construction company, Busan New Port Phase 1 Project)
Kim, Tae-Hyung (Division of Civil and Environmental Engineering, Korea Maritime University)
Publication Information
Journal of Navigation and Port Research / v.33, no.2, 2009 , pp. 119-125 More about this Journal
Abstract
The effect of plastic board drains (PBDs)on ground improvement was checked out considering three crucial factors: ground settlement, undrained shear strength, and residual water head. First, the settlement analysis including initial settlement induced by reclamation of sand mat was conducted by back calculation analysis with measured data. Its result showed toot the PBDs used for this site worked well on improving soft ground. Secondly, the undrained shear strength was investigated by laboratory and in-situ tests including unconsolidated-undrained triaxial compression (UU) tests, unconfined compression tests, in-situ vane tests, and cone penetration tests. From the test results, they showed that the undrained shear strength of the improved ground by PBDs was significantly increased as well as the strength increasing ratio especially $10{\sim}15m$ below the ground surface on site. Thirdly, the residual water head measurement from the in situ dissipation test was found the same as the static water head, which indicated primary consolidation was completed and the effect of soil improvement with PBDs can be confirmed.
Keywords
Shear Strength; Settlement; Soft Marine Clay; Plastic Board Drain (PBD);
Citations & Related Records
연도 인용수 순위
  • Reference
1 Hansbo, S. (1981), "Consolidation by vertical drains", Geotechnique 31, No.5, pp. 45-66   DOI   ScienceOn
2 Kim, D.W., Lee, S.Y., Cho, K.S., Seo, M.H., and Kim, II. (2006), "Evaluation of discharge capacity of plastic board drain in simulated service situation", Polymer testing, Vol. 25, Issue 8, pp. 986-993   DOI   ScienceOn
3 Lee, H.J., Jung, J.B., Byun, G.J., and Yang, S.Y.(2006), "Improvement of plastic board drain method applied at the Pusan New Port Project site in Korea", The Proceedings of the 16th ISOPE conference, USA, Vol. II, PP. 376 - 383
4 Miura, N., Chai, J.C., and Toyota, K. (1998), "Investigation on some factors affecting discharge capacity of prefabricated vertical grain", Sixth International Conference on Geosynthetics, p. 845
5 Onoue, A. (1988b), "Consolidation by vertical drains taking well resistance and smear into consideration", Soils and Foundations, Vol. 28, No.4, pp. 165-174   DOI   ScienceOn
6 Hansbo, S. (1979), "Consolidation of clay by band-shaped prefabricated drains", Ground Engineering, Vol. 12, No.5, pp. 16-25
7 Basu, D. and Prezzi, M. (2007), "Effect of the smear and transition zones around prefabricated vertical drains installed in a triangular pattem on the rate of soil consolidation", Int. J. Geomech., Vol. 7, Issue 1, pp. 34-43   DOI   ScienceOn
8 Korean Geotechnical Society (2004). "Report of the evaluation of PBD improvement at Pusan New Port Project," pp 95-105
9 Korea Pusan New Port Company (1999), "Design Manual of the Pusan New Port Project," Part II, pp.137l
10 Barron, R.A. (1948), "Consolidation of fine-grained soils by drain wells", Trans. ASCE, Vol. 113, pp. 718-748
11 Korea Pusan New Port Company (1997), "Report of soil investigation at Pusan New Port Area"
12 Kiyama, M., Oshima, A., Kusakabe, F., and Harada, K (2000), "The new acceleratced consolidation method combining the dewatering and plastic-board-drain by floating system (PDF) methods", Proceedings of the Soft Ground Technology Conference sponsored by the United Engineering Foundation, the Geo-Institute of the American Society of Civil Engineers, May 28 - June 2, Noordwijkerhout, the Netherlands, pp. 246-258
13 Yoshikuni, H. and Nakanodo, H. (1974), "Consolidation of soils by vertical drain wells with finite permeability", Soils and Foundation, Vol. 14, No.2, pp. 35-46   DOI
14 Onoue, A. (1988a) , "Consolidation of multilayered anisotropic soils by vertical drains with well resistance", Soils and Foundations, Vol. 28, No.4, pp. 75-90   DOI
15 Holts, R.D., Jamiolkowski, M., LancelloLta, R. and Perroni, S. (1989), "Behavior of bent prefabricated vertical drains", Proceedings of the 12th ICSMFE, p. 13
16 Zeng, G. X. and Xie, K. H. (1989), "New development of the vertical drain theories", Proc. 12th International Conference on Soil Mechanics and Foundation Engineering Rio de Janeiro, Brazil, Vol. 2, pp. 1435-1438
17 Yoshikuni, H. and Nakanodo, H. (1981), "Consolidation of fine-grained soils by prefabricated drain", Proceedings of the 10th ICSMFE, Stockholm, Vol. 3, pp. 677-682
18 Chai, J,C. and Miura, N. (1999), "Investigation on some factors affecting vertical drain behavior, J. Geotech. Geoenviron. Eng. Vol 125, No.3, p. 216   DOI   ScienceOn