Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical simulation and sensitivity analyses of full-scale test embankment with reinforced lightweight geomaterials on soft Bangkok clay
A full-scale test embankment was constructed on soft Bangkok clay using rubber tire chip-sand mixture as a lightweight geomaterial reinforced with geogrid under working stress conditions. The facing of the embankment was made of segmental concrete blocks with rock filled gabion boxes. This paper attempts to simulate the behavior of the full-scale test embankment using PLAXIS finite element 2D program by means of undrained analysis in the construction stage and thereafter consolidation analysis was performed during the service stage. The settlement predictions of the soft clay foundation mostly depended on the assumed thickness of the weathered crust and the OCR values of the soft clay layer. The FEM computed geogrid movements were smaller than the observed field data due to the use of lightweight tire chips-sand backfill. The sensitivity analyses of settlements, excess pore water pressures, lateral wall movements, geogrid movements and tensions in geogrid were performed by varying the weathered crust thickness, the OCR values of soft clay, the permeability values of the soft clay and the interface coefficient of the geogrid. The settlements and the excess pore water pressures changed significantly when the OCR and the permeability values of soft clay were varied. The interface coefficient of the geogrid reinforcements affected the lateral wall movements, geogrid movements and tensions in the geogrids. The results of analyses show that the FEM analysis using 2D plane strain conditions provided satisfactory predictions for the field performance.
Numerical simulation and sensitivity analyses of full-scale test embankment with reinforced lightweight geomaterials on soft Bangkok clay
A full-scale test embankment was constructed on soft Bangkok clay using rubber tire chip-sand mixture as a lightweight geomaterial reinforced with geogrid under working stress conditions. The facing of the embankment was made of segmental concrete blocks with rock filled gabion boxes. This paper attempts to simulate the behavior of the full-scale test embankment using PLAXIS finite element 2D program by means of undrained analysis in the construction stage and thereafter consolidation analysis was performed during the service stage. The settlement predictions of the soft clay foundation mostly depended on the assumed thickness of the weathered crust and the OCR values of the soft clay layer. The FEM computed geogrid movements were smaller than the observed field data due to the use of lightweight tire chips-sand backfill. The sensitivity analyses of settlements, excess pore water pressures, lateral wall movements, geogrid movements and tensions in geogrid were performed by varying the weathered crust thickness, the OCR values of soft clay, the permeability values of the soft clay and the interface coefficient of the geogrid. The settlements and the excess pore water pressures changed significantly when the OCR and the permeability values of soft clay were varied. The interface coefficient of the geogrid reinforcements affected the lateral wall movements, geogrid movements and tensions in the geogrids. The results of analyses show that the FEM analysis using 2D plane strain conditions provided satisfactory predictions for the field performance.
Numerical simulation and sensitivity analyses of full-scale test embankment with reinforced lightweight geomaterials on soft Bangkok clay
Numerische Simulation und Empfindlichkeitsanalyse eines mit leichtem Geomaterial verstärkten Versuchs-Böschungsbauwerks mit realen Abmessungen auf weichem Lehm in Bangkok
Tanchaisawat, T. (Autor:in) / Bergado, D.T. (Autor:in) / Vootttipruex, P. (Autor:in)
Geotextiles and Geomembranes ; 26 ; 498-511
2008
14 Seiten, 23 Bilder, 10 Tabellen, 52 Quellen
Aufsatz (Zeitschrift)
Englisch
Full scale test embankment on soft Bangkok clay with Tenax geogrid reinforcement
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Performance of Full Scale Embankment on Soft Bangkok Clay with Geogrid Reinforcement
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