Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Back-analyses of flow parameters of PVD improved soft Bangkok clay with and without vacuum preloading from settlement data and numerical simulations
Abstract Prefabricated vertical drains (PVDs) with embankment preloading (conventional PVDs) and with embankment combined with vacuum preloading (Vacuum-PVDs) are examined using the field data obtained from the site of the Suvarnabhumi Airport, Thailand. The flow parameters were back-analyzed by comparison of measured and predicted or simulated data. The flow parameters were illustrated in terms of the horizontal coefficient of consolidation (C h) and the ratio between the horizontal hydraulic conductivity in undisturbed zone (k h) and the horizontal hydraulic conductivity in smear zone (k s) or (k h/k s). Numerical simulations using one-dimensional FEM PVDCON software with equivalent vertical permeability, k ev, to determine the appropriate C h and k h/k s of PVDs with conventional embankment preloading and with embankment combined with vacuum preloading schemes were made. Furthermore, numerical simulations using axisymmetric FEM by ABAQUS software, incorporating horizontal (k h) and vertical (k v) permeabilities, to determine the appropriate k h/k s based on back-calculated C h of conventional PVD and Vacuum-PVD schemes were also done. The Vacuum-PVD scheme indicated faster rate of settlement than conventional PVD scheme by about 1.7–1.8 times with slight reduction of the k h/k s ratios. For conventional PVD, it was demonstrated that the increase in k h/k s ratios reduced the simulated rate of settlement.
Back-analyses of flow parameters of PVD improved soft Bangkok clay with and without vacuum preloading from settlement data and numerical simulations
Abstract Prefabricated vertical drains (PVDs) with embankment preloading (conventional PVDs) and with embankment combined with vacuum preloading (Vacuum-PVDs) are examined using the field data obtained from the site of the Suvarnabhumi Airport, Thailand. The flow parameters were back-analyzed by comparison of measured and predicted or simulated data. The flow parameters were illustrated in terms of the horizontal coefficient of consolidation (C h) and the ratio between the horizontal hydraulic conductivity in undisturbed zone (k h) and the horizontal hydraulic conductivity in smear zone (k s) or (k h/k s). Numerical simulations using one-dimensional FEM PVDCON software with equivalent vertical permeability, k ev, to determine the appropriate C h and k h/k s of PVDs with conventional embankment preloading and with embankment combined with vacuum preloading schemes were made. Furthermore, numerical simulations using axisymmetric FEM by ABAQUS software, incorporating horizontal (k h) and vertical (k v) permeabilities, to determine the appropriate k h/k s based on back-calculated C h of conventional PVD and Vacuum-PVD schemes were also done. The Vacuum-PVD scheme indicated faster rate of settlement than conventional PVD scheme by about 1.7–1.8 times with slight reduction of the k h/k s ratios. For conventional PVD, it was demonstrated that the increase in k h/k s ratios reduced the simulated rate of settlement.
Back-analyses of flow parameters of PVD improved soft Bangkok clay with and without vacuum preloading from settlement data and numerical simulations
Voottipruex, P. (Autor:in) / Bergado, D.T. (Autor:in) / Lam, L.G. (Autor:in) / Hino, T. (Autor:in)
Geotextiles and Geomembranes ; 42 ; 457-467
22.07.2014
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Engineering properties of soft Bangkok clay improved using PVD with surcharge and vacuum preloading
| British Library Conference Proceedings | 1998
PVD Improvement of Soft Bangkok Clay with Combined Vacuum and Reduced Sand Embankment Preloading
| British Library Online Contents | 1998