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Geotechnical and Geological Engineering

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01-08-2014 | Original paper

Finite Element Analyses and Experimental Investigation of Helical Micropiles

Authors: Konstantina Papadopoulou, Harris Saroglou, Vasileios Papadopoulos

Published in: Geotechnical and Geological Engineering | Issue 4/2014

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Abstract

Within the framework of a research program on the behaviour of a specific type of screw micropile with helical plates of 220 mm diameter, the response in axial and horizontal loadings by the finite element method and full scale in situ tests were investigated. For the axial compressive or tensile loads, the simulation of the helical plates was carried out under axisymmetric conditions as shell foundations. The cases of purely cohesive or cohesionless soils with linear elastic–perfectly plastic behaviour were studied. The influence of shear strength parameters and the number of helical plates on the characteristic-ultimate resistance were also analyzed. For the horizontal loads 3D F.E. programs were applied for the analyses of the micropiles either as short or long ones. The in situ tests, which are presented in this article, were performed in two areas with representative subsoil conditions. The respective predictions from the F.E. method were based on results of geotechnical investigations and compared with the results of the in situ tests. A good approximation was ascertained, especially for uplift and horizontal loads and the differences were commented.

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Title: Finite Element Analyses and Experimental Investigation of Helical Micropiles
Authors: Konstantina Papadopoulou
Harris Saroglou
Vasileios Papadopoulos
Publication date: 01-08-2014
Publisher: Springer International Publishing
Published in: Geotechnical and Geological Engineering / Issue 4/2014
Print ISSN: 0960-3182
Electronic ISSN: 1573-1529
DOI: https://doi.org/10.1007/s10706-014-9771-6

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