Modelling installation of helical anchors in clay

C. Todeshkejoei; J. P. Hambleton; S. A. Stanier; C. Gaudin

Modelling installation of helical anchors in clay

C. Todeshkejoei, J. P. Hambleton, S. A. Stanier, C. Gaudin

Civil and Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

Helical anchors, which are mostly used to resist uplift, are deep foundations installed by rotation into the ground. Despite the central role of the installation process, especially with respect to the effect of soil disturbance, relatively little is known about the forces and deformations occurring during installation. An exception is the field verification technique known as torque-capacity correlation, which attempts to relate installation torque directly to uplift capacity. However, there are open questions regarding this approach, since not all significant parameters, such as installation vertical force and helix pitch, are taken into consideration. This could be one of the main reasons behind the wide range of torque-correlation factors reported in the literature. This study presents a three-dimensional numerical analysis of the installation process for helical anchors in clay. The results are synthesised into convenient yield envelopes that predict the relationship between installation torque and normal force as functions of helix pitch, roughness, and thickness. The application of the findings to torque-capacity correlation is also discussed.

Original language	English (US)
Title of host publication	Computer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014
Publisher	Taylor and Francis - Balkema
Pages	917-922
Number of pages	6
ISBN (Print)	9781138001480
State	Published - Jan 1 2015
Event	14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014 - Kyoto, Japan Duration: Sep 22 2014 → Sep 25 2014

Publication series

Name	Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014

Other

Other	14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014
Country	Japan
City	Kyoto
Period	9/22/14 → 9/25/14

ASJC Scopus subject areas

Computer Science Applications
Geochemistry and Petrology

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Todeshkejoei, C., Hambleton, J. P., Stanier, S. A., & Gaudin, C. (2015). Modelling installation of helical anchors in clay. In Computer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014 (pp. 917-922). (Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014). Taylor and Francis - Balkema.

Todeshkejoei, C. ; Hambleton, J. P. ; Stanier, S. A. ; Gaudin, C. / Modelling installation of helical anchors in clay. Computer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014. Taylor and Francis - Balkema, 2015. pp. 917-922 (Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014).

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title = "Modelling installation of helical anchors in clay",

abstract = "Helical anchors, which are mostly used to resist uplift, are deep foundations installed by rotation into the ground. Despite the central role of the installation process, especially with respect to the effect of soil disturbance, relatively little is known about the forces and deformations occurring during installation. An exception is the field verification technique known as torque-capacity correlation, which attempts to relate installation torque directly to uplift capacity. However, there are open questions regarding this approach, since not all significant parameters, such as installation vertical force and helix pitch, are taken into consideration. This could be one of the main reasons behind the wide range of torque-correlation factors reported in the literature. This study presents a three-dimensional numerical analysis of the installation process for helical anchors in clay. The results are synthesised into convenient yield envelopes that predict the relationship between installation torque and normal force as functions of helix pitch, roughness, and thickness. The application of the findings to torque-capacity correlation is also discussed.",

author = "C. Todeshkejoei and Hambleton, {J. P.} and Stanier, {S. A.} and C. Gaudin",

year = "2015",

month = jan,

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series = "Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014",

publisher = "Taylor and Francis - Balkema",

pages = "917--922",

booktitle = "Computer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014",

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Todeshkejoei, C, Hambleton, JP, Stanier, SA & Gaudin, C 2015, Modelling installation of helical anchors in clay. in Computer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014. Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014, Taylor and Francis - Balkema, pp. 917-922, 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014, Kyoto, Japan, 9/22/14.

Modelling installation of helical anchors in clay. / Todeshkejoei, C.; Hambleton, J. P.; Stanier, S. A.; Gaudin, C.

Computer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014. Taylor and Francis - Balkema, 2015. p. 917-922 (Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Modelling installation of helical anchors in clay

AU - Todeshkejoei, C.

AU - Hambleton, J. P.

AU - Stanier, S. A.

AU - Gaudin, C.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Helical anchors, which are mostly used to resist uplift, are deep foundations installed by rotation into the ground. Despite the central role of the installation process, especially with respect to the effect of soil disturbance, relatively little is known about the forces and deformations occurring during installation. An exception is the field verification technique known as torque-capacity correlation, which attempts to relate installation torque directly to uplift capacity. However, there are open questions regarding this approach, since not all significant parameters, such as installation vertical force and helix pitch, are taken into consideration. This could be one of the main reasons behind the wide range of torque-correlation factors reported in the literature. This study presents a three-dimensional numerical analysis of the installation process for helical anchors in clay. The results are synthesised into convenient yield envelopes that predict the relationship between installation torque and normal force as functions of helix pitch, roughness, and thickness. The application of the findings to torque-capacity correlation is also discussed.

AB - Helical anchors, which are mostly used to resist uplift, are deep foundations installed by rotation into the ground. Despite the central role of the installation process, especially with respect to the effect of soil disturbance, relatively little is known about the forces and deformations occurring during installation. An exception is the field verification technique known as torque-capacity correlation, which attempts to relate installation torque directly to uplift capacity. However, there are open questions regarding this approach, since not all significant parameters, such as installation vertical force and helix pitch, are taken into consideration. This could be one of the main reasons behind the wide range of torque-correlation factors reported in the literature. This study presents a three-dimensional numerical analysis of the installation process for helical anchors in clay. The results are synthesised into convenient yield envelopes that predict the relationship between installation torque and normal force as functions of helix pitch, roughness, and thickness. The application of the findings to torque-capacity correlation is also discussed.

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M3 - Conference contribution

AN - SCOPUS:84907363193

SN - 9781138001480

T3 - Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014

SP - 917

EP - 922

BT - Computer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014

PB - Taylor and Francis - Balkema

T2 - 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014

Y2 - 22 September 2014 through 25 September 2014

ER -

Todeshkejoei C, Hambleton JP, Stanier SA, Gaudin C. Modelling installation of helical anchors in clay. In Computer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014. Taylor and Francis - Balkema. 2015. p. 917-922. (Computer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014).