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Equivalent diameter of a prefabricated vertical drain
Geotextiles and Geomembranes, 2009The aim of this study is to evaluate numerically the equivalent diameter of a prefabricated vertical drain (PVD) using an equal flow rate approach. This approach requires that the equivalent circular well to be able to yield similar discharge as a PVD well when subjected to similar pressure-controlled pumping condition.
Abuel-Naga, Hossam, Bouazza, Abdelmalek
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Installation Stress in Prefabricated Vertical Drains
Journal of Geotechnical and Geoenvironmental Engineering, 2003Prefabricated vertical drains (PVDs) normally consist of a core and a filter (sleeve) made with polymeric materials. Modern installation rigs are capable of installing them at considerable speed in soft soil deposits. This note reports the tension developed in a PVD filter sleeve during the installation process, which was monitored with strain gauges ...
Karunaratne, G.P. +6 more
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Recent Advances in Prefabricated Vertical Drains
Ports 2013, 2013Modern port development on the US East Coast and Gulf Coast many times takes place on soft and compressible sites. As such, ground improvement is employed to meet project design criteria. Due to the relative economy of implementing surcharge combined with prefabricated vertical drains, the use of prefabricated vertical drains is growing.
A. D. Goldberg, M. A. Palmatier
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Draining Collars and Lenses in Liquid-Lined Vertical Tubes
Journal of Colloid and Interface Science, 2000The speed at which an annular liquid collar drains under gravity g in a vertical tube of radius a, when the tube has an otherwise thin viscous liquid lining on its interior, is determined by a balance between the collar's weight and viscous shear stresses confined to narrow regions in the neighborhood of the collar's effective contact lines.
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The efficiency of partially penetrating vertical drains
Géotechnique, 1985The Paper deals with the problem of consolidation of a clay layer in which vertical partially penetrating drains have been installed. The influence of well resistance is considered in the analysis, which is performed by means of the finite element method. The drainage pattern for each drain is assumed to be axisymmetric. Diagrams of the average degree
K. Runesson, S. Hansbo, N. E. Wiberg
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The Design of the Vertical Sand Drain
Journal of Science Technology and Engineering Mien Tay Construction UniversityA vertical sand drain is designed to allow fluids to drain from clay or silty soil by drilling a hole and filling it with sand or gravel. Sand drains are required for building in places where drainage is limited due to extremely fine soils, such as clay or silt.
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Equal Strain Consolidation by Vertical Drains
Journal of Geotechnical and Geoenvironmental Engineering, 2004This paper shows the development of a series of closed-form solutions of equal strain consolidation in the presence of a vertical drain with smear and well resistance. Using an approach that considers the effects of both the radial and vertical drainage in a fully coupled fashion, solutions are obtained for the excess pore pressure and the degree of ...
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Comparison of Performance of Various Vertical Drains
2018India has a vast extend of coastal area and has got large deposits of soft marine clays extending to a depth of 15–60 m. Construction on marine clays is a big challenge because of its high compressibility, low shear strength and excessive settlement. Ground Improvement techniques such as sand drain, gravel drains, PVD, stone columns etc.
Fifi Jacob +4 more
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