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Experimental Evaluation of the Effects of Structural Parameters, Installation Methods and Soil Density on the Micropile Bearing Capacity

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Abstract

Recognition of the behaviour of micropiles under the influence of various parameters can help in the most efficient and optimal use of this improvement instrument. The present research conducted multiple static strain-control loading tests with a displacement rate of 10 mm/min and a laboratory program using a large-scale physical modelling device to evaluate various parameters such as the length, diameter, bond radius, and bond skin friction of micropiles in sandy soils with different relative densities. In addition, the load-bearing capacities of bored and driven micropiles were compared and the results demonstrated the effects of each parameter, as well as installation methods on the load-bearing capacity of the micropiles. The results show the significant role of the relative density parameter compared to other parameters in the values of the load-bearing capacity of the micropile. The results of the experiments further revealed that the diameter parameter has an average effect of about 12% more than the length parameter on load-bearing capacity values at different soil densities and the driven installation method can increase the load-bearing capacity up to a maximum of 84% compared to the bored method.

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The authors whose names are listed in the title page certify that they have NO affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations,knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

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  1. Faculty of Civil Engineering, Shahrood University of Technology, 3619995161, Shahrood, Iran

    Hossein Moradi Moghaddam, Mohsen Keramati, Amin Ramesh & Reza Naderi

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  1. Hossein Moradi Moghaddam
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  2. Mohsen Keramati
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  3. Amin Ramesh
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  4. Reza Naderi
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Correspondence to Mohsen Keramati.

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Moradi Moghaddam, H., Keramati, M., Ramesh, A. et al. Experimental Evaluation of the Effects of Structural Parameters, Installation Methods and Soil Density on the Micropile Bearing Capacity. Int J Civ Eng 19, 1313–1325 (2021). https://doi.org/10.1007/s40999-021-00629-5

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  • DOI: https://doi.org/10.1007/s40999-021-00629-5

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