Abstract
Piles are generally adopted as the foundation in groups; pile group efficiency reduces with an increase in the number of piles in a pile group. For regular pile groups, pile group efficiency will be lesser than 90%. This paper attempts to increase the lateral resistance of the pile group by adopting innovative finned piles. Small-scale model experiments were performed on regular and finned pile groups embedded in c–\(\phi\) soil. The numerical studies were performed with the Finite Element Approach. The paper investigates and presents the effects of various factors, such as the effect of fins for the pile group, the number of piles (n), pile spacings (S) in the pile group, and behavior under eccentric loading. Studies were performed over pile groups with 4 and 5 piles spaced at 4\(D_\textrm{p}\) and 6\(D_\textrm{p}\), forming P\(_4\)S\(_4\), P\(_5\)S\(_4\), P\(_4\)S\(_6\), and P\(_5\)S\(_6\). The finned pile groups were observed to resist greater lateral loads than regular pile groups, increasing the pile group efficiency, ranging up to 185%. For finned pile groups, the effect of pile-spacing (S) dominates over the number of piles (n). The cost-benefit analysis of finned pile groups was performed compared to regular pile groups. In addition, regression analyses were performed to develop a correlation to calculate the lateral resistance of the finned pile groups from various fin parameters.
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Acknowledgements
The authors would like to acknowledge the funding received from the IMPRINT-2 program of DST/SERB with MHRD for the Project titled “Impounding of River floodwaters along Dakshina Kannada Coast: A sustainable strategy for water resource development” (IMP/2018/001298).
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Bariker, P., Kolathayar, S. Model tests and numerical modelling on lateral resistance of novel finned-pile groups. Innov. Infrastruct. Solut. 8, 224 (2023). https://doi.org/10.1007/s41062-023-01187-6
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DOI: https://doi.org/10.1007/s41062-023-01187-6