An Extension to Barcelona Basic Model Predicting the Behavior of Unsaturated Soils

Slope failures along highways can highly affect the stability of road structure. In this respect, the analysis of the wetting process in unsaturated media is of great importance to slopes and pavements. In this study, the Barcelona basic model (BBM) was implemented in finite difference-based program...

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Bibliographic Details
Published in:Transportation infrastructure geotechnology 2022-04, Vol.9 (2), p.133-154
Main Authors: Sadeghabadi, Alireza, Noorzad, Ali, Zad, Amirali
Format: Article
Language:English
Subjects:
Building Materials
Consolidation
Engineering
Fine-grained soils
Finite difference method
Foundations
Geoengineering
Geomechanics
Geotechnical Engineering & Applied Earth Sciences
Geotechnology
Highway construction
Highways
Hydraulics
Infrastructure
Pavements
Roads & highways
Shear strength
Soil
Soil compaction
Soil improvement
Soil investigations
Soil mixing
Soil stability
Soil stresses
Soils
Stability analysis
Structural stability
Technical Paper
Unsaturated soils
Wetting
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Summary:Slope failures along highways can highly affect the stability of road structure. In this respect, the analysis of the wetting process in unsaturated media is of great importance to slopes and pavements. In this study, the Barcelona basic model (BBM) was implemented in finite difference-based program to investigate the geomechanical behavior of fine-grained unsaturated soils subjected to wetting. This numerical modeling has been verified against some data in the literature. The application of the model was investigated for the response of a compacted fill slope involving suction-induced problems. The study also considered the effect of the over-consolidation ratio (OCR) in unsaturated soils, especially stress paths, as a modification to BBM. The simulations also include using BBM and modified BBM in FLAC to evaluate the response of deep soil mixing (DSM) improvement method in subsurface areas of the pavements in unsaturated media. Finally, modified BBM codes in the finite-difference program were presented for dealing with problems associated with soil slope and the DSM method to improve the foundation of pavements. Also, over-consolidation ratio has been added to BBM to optimize its application in suction various processes. Overall, it has been found that the modified BBM leads to more occurred results.
ISSN:2196-7202
2196-7210
DOI:10.1007/s40515-021-00159-6