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Three-dimensional numerical analyses of pervious concrete column for soft soil improvement


Affiliations
1 Applied Mechanics Department, Government Engineering College, Dahod 389 151, India
2 Civil Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, India
3 Civil Engineering Department, GIDC Degree Engineering College, Navsari 396 406, India
 

Stone column (SC) or granular column is widely used as a soil improvement method for flexible foundations such as oil storage tanks, embankments and rigid foun­dations. The confining pressure exerted by the surrounding soil allows the SC to develop its bearing capacity. The soft soil surrounding a SC may not provide sufficient lateral confinement. So, the design bearing carrying capacity may not be achieved. In such soils, a pervious concrete column (PCC) may be applied which deals with reinforcement as well as drainage. PCC can be constructed up to the full depth of soft soil or on the upper portion of a stone column up to which bulging is predominant. This study presents a parametric analysis of the performance of SCs, PCCs and composite columns (CCs) using three-dimensional numerical analyses. The parameters consider are: PCC diameter, PCC length in CCs surrounding soft clay cohesion, and full PCC length. Furthermore, the load transfer mechanism of pervious concrete is compared to that of a SC. In comparison to ordinary SCs, the findings of this study show that pervious concrete columns have a substantially better load carrying capacity and experience less lateral displacement. Furthermore, in a CC, the length of pervious concrete up to four times the column diameter may be sufficient to enhance the load carrying capacity of an ordinary SC.

Keywords

Finite element analyses, land carrying capacity, pervious concrete column, soil improvement, stone column.
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  • Three-dimensional numerical analyses of pervious concrete column for soft soil improvement

Abstract Views: 323  |  PDF Views: 137

Authors

Y. K. Tandel
Applied Mechanics Department, Government Engineering College, Dahod 389 151, India
J. B. Baruah
Civil Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, India
S. Budde
Civil Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, India
S. Kumar
Civil Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, India
C. H. Solanki
Civil Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, India
B. G. Patel
Civil Engineering Department, GIDC Degree Engineering College, Navsari 396 406, India

Abstract


Stone column (SC) or granular column is widely used as a soil improvement method for flexible foundations such as oil storage tanks, embankments and rigid foun­dations. The confining pressure exerted by the surrounding soil allows the SC to develop its bearing capacity. The soft soil surrounding a SC may not provide sufficient lateral confinement. So, the design bearing carrying capacity may not be achieved. In such soils, a pervious concrete column (PCC) may be applied which deals with reinforcement as well as drainage. PCC can be constructed up to the full depth of soft soil or on the upper portion of a stone column up to which bulging is predominant. This study presents a parametric analysis of the performance of SCs, PCCs and composite columns (CCs) using three-dimensional numerical analyses. The parameters consider are: PCC diameter, PCC length in CCs surrounding soft clay cohesion, and full PCC length. Furthermore, the load transfer mechanism of pervious concrete is compared to that of a SC. In comparison to ordinary SCs, the findings of this study show that pervious concrete columns have a substantially better load carrying capacity and experience less lateral displacement. Furthermore, in a CC, the length of pervious concrete up to four times the column diameter may be sufficient to enhance the load carrying capacity of an ordinary SC.

Keywords


Finite element analyses, land carrying capacity, pervious concrete column, soil improvement, stone column.

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DOI: https://doi.org/10.18520/cs%2Fv122%2Fi9%2F1044-1050