Numerical analysis of an experimental pipe buried in swelling soil |
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Authors: | Pathmanathan Rajeev Jayantha Kodikara |
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Institution: | Department of Civil Engineering, Faculty of Engineering, Building 60, Clayton Campus, Monash University, VIC 3800, Australia |
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Abstract: | This paper investigates the pipe–soil interaction for pipes buried in expansive soil when subjected to swelling soil movement due to increase in moisture content. A laboratory experiment has been undertaken on a plastic pipe in a large-scale pipe box. A three dimensional numerical model is developed to analyse the pipe response, using FLAC3D computer program. The pipe is assumed to behave as a linearly elastic material, while the soil is modelled as a nonlinear material with Mohr–Coulomb failure criterion. The water flow and soil/pipe deformations are decoupled, where water flow is calculated using simplified capillary rise theory on the basis of measurements made. A reasonably good agreement between the experimental results and model predictions is reported. |
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Keywords: | Soil swelling Pipe&ndash soil interaction Numerical analysis Expansive soil Moisture content |
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