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.
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