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Performance of Under-Reamed Piles Subjected to Harmonic Vibration Considering Geometric Variation

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Abstract

This study aims to investigate the performance of under-reamed piles under vertical harmonic vibration. A 3D finite element model has been developed and the effect of geometrical features of pile like aspect ratio, number of bulbs, and bulb spacings are being explored in this study. Under-reamed piles having a stem diameter of 0.2 m and bulb diameter of 0.5 m, under eccentric moments of 0.005 kg-m, 0.01 kg-m, and 0.02 kg-m were considered. Variations of geometries included length of the pile (4 m, 5 m, and 6 m), aspect ratios (20, 25, and 30), number of bulbs from 1 to 3, and bulb spacing (0.5 m, 0.75 m, and 1 m). The study concluded that an increase in length and bulb numbers highly influenced the performance of under-reamed piles by reducing amplitude to a better extent. However, an increase in spacing between bulbs exhibits negligible variations in resonant amplitude when subjected to dynamic loading.

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Authors and Affiliations

  1. Department of Civil Engineering, National Institute Technology, Warangal, 506004, India

    Deepthi Sudhi & Sanjit Biswas

  2. Hawkins cookers limited, Hoshiarpur, 146001, Punjab, India

    Subhabrata Dey

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  1. Deepthi Sudhi
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  2. Subhabrata Dey
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  3. Sanjit Biswas
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Correspondence to Deepthi Sudhi.

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Sudhi, D., Dey, S. & Biswas, S. Performance of Under-Reamed Piles Subjected to Harmonic Vibration Considering Geometric Variation. Transp. Infrastruct. Geotech. (2024). https://doi.org/10.1007/s40515-024-00402-w

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