Numerical analysis of an embankment built on soft soil reinforced with deep mixing columns: Parametric study

The behaviour of an embankment built on normally consolidated soft soil reinforced with deep mixing columns is studied using a coupled soil–water formulation. The numerical predictions are analysed in terms of settlements, increments in vertical effective stresses and excess pore pressures. Firstly,...

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Bibliographic Details
Published in:Computers and geotechnics 2011-06, Vol.38 (4), p.566-576
Main Authors: Venda Oliveira, Paulo J., Pinheiro, João L.P., Correia, António A.S.
Format: Article
Language:English
Subjects:
Computer simulation
Consolidation
Deep mixing columns
Embankment on soft clay
Embankments
Mathematical models
Modified Cam Clay model
Numerical analysis
Numerical prediction
Parametric study
Porosity
Settlements
Soil (material)
Soil improvement
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Summary:The behaviour of an embankment built on normally consolidated soft soil reinforced with deep mixing columns is studied using a coupled soil–water formulation. The numerical predictions are analysed in terms of settlements, increments in vertical effective stresses and excess pore pressures. Firstly, the effectiveness of the use of deep mixing columns is studied. Afterwards, a parametric analysis is performed to study the influence on the soil-columns system of the replacement ratio (columns’ spacing), the deformability of the embankment and columns, and the coefficient of vertical permeability of the columns.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2011.03.005