A New Approach to Solution for Partially Penetrated Prefabricated Vertical Drains
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Partially penetrated prefabricated vertical drains (PVDs) have been analyzed by many methods, including analytical methods, semi-analytical methods and finite element methods (FEM). The recent methods have considered the drain’s end as a permeable region while most of the current construction techniques use an anchor plate element at the end of a PVD, which prevents water flowing from the beneath untreated soil. This paper takes this practical situation into account and derives a semi-analytical solution for partially penetrated vertical drains. The results are also verified by FEM method using ABAQUS software. As a result, the excess pore pressure with depth obtained by the proposed solution is mechanically reasonable as compared with previous solutions and FEM. In addition, a subroutine of visual basic for application in Microsoft Excel is developed to easily obtain eigenvalues.
KeywordsConsolidation Prefabricated vertical drain (PVD) Analytical solution Partial penetration Soft soil
Financial support for this study was provided from the Ho Chi Minh City Open University.
- 4.Indraratna B, Aljorany A, Rujikiatkamjorn C (2008) Analytical and numerical modeling of consolidation by vertical drain beneath a circular embankment. J Geotech Eng 8:199–206. https://doi.org/10.1061/(ASCE)1532-3641(2008)8:3(199) Google Scholar
- 5.Chai JC, Shen SL, Miura N, Bergado DT (2001) Simple method of modeling PVD improved subsoil. J Geotech Eng 127(11):965–972. https://doi.org/10.1061/(ASCE)1090-0241(2001)127:11(965) CrossRefGoogle Scholar
- 6.Voottipruex P, Bergado DT, Lam LG, Hino T (2014) Back-analyses of flow parameters of PVD improved soft Bangkok clay with and without vacuum preloading from settlement data and numerical simulations. Geotext Geomembr 42(5):457–467. https://doi.org/10.1016/j.geotexmem.2014.07.004 CrossRefGoogle Scholar
- 8.Indraratna B, Rujikiatkamjorn C (2008) Effects of partially penetrating prefabricated vertical drains and loading patterns on vacuum consolidation. In: Proceedings of GeoCongress 2008: Geosustainability and Geohazard Mitigation, New Orleans, La., 9–12 March 2008. GSP 178. Edited by K.R. Reddy, M.V. Khire, and A.N. Alshawabkeh. American Society of Civil Engineers, Reston, pp 596–603Google Scholar
- 10.Tang XW, Onitsuka K (1998) Consolidation of ground with partially penetrated vertical drains. Geotech Eng J 29(2):209–231Google Scholar
- 12.Zeng GX, Xie KH (1989) New development of the vertical drain theories. In: Proceedings of the 12th International conference on Soil Mechanics and Foundation Engineering (ICSMFE), Rio de Janeiro, Brazil, 13–18 August 1989. Balkema, Rotterdam, The Netherlands, vol 2, pp 1435–1438Google Scholar