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Bearing Capacity of Stone Column Reinforced Foundation Subjected to Inclined Loadings

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International Journal of Geosynthetics and Ground Engineering Aims and scope Submit manuscript

Abstract

This paper presents a numerical study of the effect of concentric inclined loading on the undrained bearing capacity of stone column group. The stone columns are arranged in a group of four columns with toe sitting on a hard stratum. A rigid square footing is placed on top of the stone columns. The soft soils and the stone columns are modelled as linear-elastic perfectly plastic material with non-associated flow rule. In this study, the area replacement ratio varies from 0.2 to 0.5 and the load inclination angle varies from 0° to 45°. The numerical results are first compared with the limit analysis for both non-reinforced foundation and a stone column reinforced foundation under vertical load. Subsequently, an analysis is carried out for cases with inclined load. Based on the results, a prediction equation is developed to estimate the modified bearing capacity factor for stone columns with inclined loads. The effect of embedment depth on bearing capacity is also investigated. The failure mechanism for stone column group is identified and found to extend deeper and larger compared to non-reinforced foundation. The inclined load has caused the failure surface to be altered and tilted.

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The data sets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Authors and Affiliations

  1. School of Civil Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Cawangan Pulau Pinang, Kampus Permatang Pauh, 13500, Permatang Pauh, Pulau Pinang, Malaysia

    Kok Shien Ng, Juliana Idrus & Yee Ming Chew

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  1. Kok Shien Ng
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  2. Juliana Idrus
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  3. Yee Ming Chew
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Contributions

KSN designed the numerical model and the computational framework, while JI analysed the data. YMC verified the numerical results using analytical methods. All authors discussed the results and contributed to the final manuscript.

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Correspondence to Kok Shien Ng.

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Ng, K.S., Idrus, J. & Chew, Y.M. Bearing Capacity of Stone Column Reinforced Foundation Subjected to Inclined Loadings. Int. J. of Geosynth. and Ground Eng. 7, 62 (2021). https://doi.org/10.1007/s40891-021-00307-5

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