Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings

S. N. Ullah; M. S. Hossain; Y. Hu; A. Fourie

doi:10.1007/978-981-13-7603-0_97

Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings

S. N. Ullah, M. S. Hossain, Y. Hu, A. Fourie

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

5 Citations (Scopus)

Abstract

3D finite element simulations are conducted to better understand the soil-structure interaction of rectangular foundations resting on a sand embankment over soft mine tailings. To account for large strains, an updated Lagrangian formulation is used in which the stiffness matrix is updated with the non-linear change of the soil geometry. The sand is modelled using a modified Mohr-Coulomb (MMC) soil model where the friction and dilation angles are varied with deviatoric plastic strains. It is shown that failure over a moderate slope angle of 22° and normalised sand embankment height (H/B) of 0.26 (H is the embankment height and B is the footing width) involves a deep seated circular slip plane, involving the sand and clay layers, where the foundation was close to the crest of the embankment. The failure pattern turns gradually to typical punch-through with an inclined sand shear plane as the distance of the footing edge exceeds 1.13B from the crest. The results of this study agree well with those from model centrifuge experiments, and can be utilised in developing better analytical models and equipment capable of live monitoring of slope deformation.

Original language	English
Title of host publication	ACMSM25
Subtitle of host publication	Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials
Editors	Chien Ming Wang, Johnny C.M. Ho, Sritawat Kitipornchai
Place of Publication	Germany
Publisher	Springer Heidelberg
Pages	1027-1036
Number of pages	10
ISBN (Electronic)	9789811376030
ISBN (Print)	9789811376023
DOIs	https://doi.org/10.1007/978-981-13-7603-0_97
Publication status	Published - 4 Sep 2020
Event	25th Australasian Conference on Mechanics of Structures and Materials - Brisbane, Australia Duration: 4 Dec 2018 → 7 Dec 2018 Conference number: ACMSM25

Publication series

Name	Lecture Notes in Civil Engineering
Volume	37
ISSN (Print)	2366-2557
ISSN (Electronic)	2366-2565

Conference

Conference	25th Australasian Conference on Mechanics of Structures and Materials
Country/Territory	Australia
City	Brisbane
Period	4/12/18 → 7/12/18

Access to Document

10.1007/978-981-13-7603-0_97

Cite this

Ullah, S. N., Hossain, M. S., Hu, Y., & Fourie, A. (2020). Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings. In C. M. Wang, J. C. M. Ho, & S. Kitipornchai (Eds.), ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials (pp. 1027-1036). (Lecture Notes in Civil Engineering; Vol. 37). Springer Heidelberg. https://doi.org/10.1007/978-981-13-7603-0_97

Ullah, S. N. ; Hossain, M. S. ; Hu, Y. et al. / Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings. ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials. editor / Chien Ming Wang ; Johnny C.M. Ho ; Sritawat Kitipornchai. Germany : Springer Heidelberg, 2020. pp. 1027-1036 (Lecture Notes in Civil Engineering).

@inproceedings{c31b722279394e38acd052bd97870b05,

title = "Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings",

abstract = "3D finite element simulations are conducted to better understand the soil-structure interaction of rectangular foundations resting on a sand embankment over soft mine tailings. To account for large strains, an updated Lagrangian formulation is used in which the stiffness matrix is updated with the non-linear change of the soil geometry. The sand is modelled using a modified Mohr-Coulomb (MMC) soil model where the friction and dilation angles are varied with deviatoric plastic strains. It is shown that failure over a moderate slope angle of 22° and normalised sand embankment height (H/B) of 0.26 (H is the embankment height and B is the footing width) involves a deep seated circular slip plane, involving the sand and clay layers, where the foundation was close to the crest of the embankment. The failure pattern turns gradually to typical punch-through with an inclined sand shear plane as the distance of the footing edge exceeds 1.13B from the crest. The results of this study agree well with those from model centrifuge experiments, and can be utilised in developing better analytical models and equipment capable of live monitoring of slope deformation.",

keywords = "Finite element, Foundations, Mine tailings, Punch-through, Sand over clay, Slope stability, Soil-structure interaction",

author = "Ullah, {S. N.} and Hossain, {M. S.} and Y. Hu and A. Fourie",

year = "2020",

month = sep,

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doi = "10.1007/978-981-13-7603-0_97",

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note = "25th Australasian Conference on Mechanics of Structures and Materials ; Conference date: 04-12-2018 Through 07-12-2018",

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Ullah, SN, Hossain, MS , Hu, Y & Fourie, A 2020, Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings. in CM Wang, JCM Ho & S Kitipornchai (eds), ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials. Lecture Notes in Civil Engineering, vol. 37, Springer Heidelberg, Germany, pp. 1027-1036, 25th Australasian Conference on Mechanics of Structures and Materials, Brisbane, Queensland, Australia, 4/12/18. https://doi.org/10.1007/978-981-13-7603-0_97

Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings. / Ullah, S. N.; Hossain, M. S.; Hu, Y. et al.

ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials. ed. / Chien Ming Wang; Johnny C.M. Ho; Sritawat Kitipornchai. Germany : Springer Heidelberg, 2020. p. 1027-1036 (Lecture Notes in Civil Engineering; Vol. 37).

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

TY - GEN

T1 - Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings

AU - Ullah, S. N.

AU - Hossain, M. S.

AU - Hu, Y.

AU - Fourie, A.

N1 - Conference code: ACMSM25

PY - 2020/9/4

Y1 - 2020/9/4

N2 - 3D finite element simulations are conducted to better understand the soil-structure interaction of rectangular foundations resting on a sand embankment over soft mine tailings. To account for large strains, an updated Lagrangian formulation is used in which the stiffness matrix is updated with the non-linear change of the soil geometry. The sand is modelled using a modified Mohr-Coulomb (MMC) soil model where the friction and dilation angles are varied with deviatoric plastic strains. It is shown that failure over a moderate slope angle of 22° and normalised sand embankment height (H/B) of 0.26 (H is the embankment height and B is the footing width) involves a deep seated circular slip plane, involving the sand and clay layers, where the foundation was close to the crest of the embankment. The failure pattern turns gradually to typical punch-through with an inclined sand shear plane as the distance of the footing edge exceeds 1.13B from the crest. The results of this study agree well with those from model centrifuge experiments, and can be utilised in developing better analytical models and equipment capable of live monitoring of slope deformation.

AB - 3D finite element simulations are conducted to better understand the soil-structure interaction of rectangular foundations resting on a sand embankment over soft mine tailings. To account for large strains, an updated Lagrangian formulation is used in which the stiffness matrix is updated with the non-linear change of the soil geometry. The sand is modelled using a modified Mohr-Coulomb (MMC) soil model where the friction and dilation angles are varied with deviatoric plastic strains. It is shown that failure over a moderate slope angle of 22° and normalised sand embankment height (H/B) of 0.26 (H is the embankment height and B is the footing width) involves a deep seated circular slip plane, involving the sand and clay layers, where the foundation was close to the crest of the embankment. The failure pattern turns gradually to typical punch-through with an inclined sand shear plane as the distance of the footing edge exceeds 1.13B from the crest. The results of this study agree well with those from model centrifuge experiments, and can be utilised in developing better analytical models and equipment capable of live monitoring of slope deformation.

KW - Finite element

KW - Foundations

KW - Mine tailings

KW - Punch-through

KW - Sand over clay

KW - Slope stability

KW - Soil-structure interaction

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M3 - Conference paper

AN - SCOPUS:85072089868

SN - 9789811376023

T3 - Lecture Notes in Civil Engineering

SP - 1027

EP - 1036

BT - ACMSM25

A2 - Wang, Chien Ming

A2 - Ho, Johnny C.M.

A2 - Kitipornchai, Sritawat

PB - Springer Heidelberg

CY - Germany

T2 - 25th Australasian Conference on Mechanics of Structures and Materials

Y2 - 4 December 2018 through 7 December 2018

ER -

Ullah SN, Hossain MS , Hu Y , Fourie A. Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings. In Wang CM, Ho JCM, Kitipornchai S, editors, ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials. Germany: Springer Heidelberg. 2020. p. 1027-1036. (Lecture Notes in Civil Engineering). https://doi.org/10.1007/978-981-13-7603-0_97

Numerical Modelling of Rectangular Footing on a Sand Embankment over Mine Tailings

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