Degradation of soft subgrade soil from slow, large, cyclic heavy haul road loads: a review

Research output: Contribution to journalArticle

Standard

Degradation of soft subgrade soil from slow, large, cyclic heavy haul road loads: a review. / Krechowiecki-Shaw, Christopher; Jefferson, Ian; Royal, Alexander; Ghataora, Gurmel; Alobaidi, Imad .

In: Canadian Geotechnical Journal, 25.05.2016.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Bibtex

@article{98994e513e97414690df259153a49b14,
title = "Degradation of soft subgrade soil from slow, large, cyclic heavy haul road loads: a review",
abstract = "Extraction of resources in remote locations can require temporary haul roads to transport extremely large, slow-moving, indivisible loads (e.g. plant, oil/gas production modules, reactors, weighing in excess of 1000 tonnes) without interruptions. Poor subgrade soils may experience larger cyclic strains and greater cyclic degradation under these conditions than under conventional roads, yet the short engineering life precludes many foundation strengthening options due to cost. As there is little research into this unique situation, this paper synthesises research from a broad range of applications to discuss implications on expected soil response. Reference is made to critical state theory and Discrete Element Method (DEM) modelling to develop fundamental concepts considering particle-scale interactions. Cyclic failure is proposed to be a kinematically unstable process, triggered by shear banding on the Hvorslev Surface, tensile liquefaction or fabric-governed meta-stable liquefaction; the latter is particularly influenced by stress history and anisotropy. This paper finds pore water pressure accumulation under load and dissipation between loads are key to cyclic degradation and furthermore to be dependent upon load duration, principal stress rotation and repetition frequency. For meta-stable, liquefiable soils in particular, inclination of principal stresses is at least as important in assessing failure risk as magnitude of stresses.",
author = "Christopher Krechowiecki-Shaw and Ian Jefferson and Alexander Royal and Gurmel Ghataora and Imad Alobaidi",
year = "2016",
month = "5",
day = "25",
doi = "10.1139/cgj-2015-0234",
language = "English",
journal = "Canadian Geotechnical Journal",
issn = "0008-3674",
publisher = "NRC Research Press",

}

RIS

TY - JOUR

T1 - Degradation of soft subgrade soil from slow, large, cyclic heavy haul road loads: a review

AU - Krechowiecki-Shaw, Christopher

AU - Jefferson, Ian

AU - Royal, Alexander

AU - Ghataora, Gurmel

AU - Alobaidi, Imad

PY - 2016/5/25

Y1 - 2016/5/25

N2 - Extraction of resources in remote locations can require temporary haul roads to transport extremely large, slow-moving, indivisible loads (e.g. plant, oil/gas production modules, reactors, weighing in excess of 1000 tonnes) without interruptions. Poor subgrade soils may experience larger cyclic strains and greater cyclic degradation under these conditions than under conventional roads, yet the short engineering life precludes many foundation strengthening options due to cost. As there is little research into this unique situation, this paper synthesises research from a broad range of applications to discuss implications on expected soil response. Reference is made to critical state theory and Discrete Element Method (DEM) modelling to develop fundamental concepts considering particle-scale interactions. Cyclic failure is proposed to be a kinematically unstable process, triggered by shear banding on the Hvorslev Surface, tensile liquefaction or fabric-governed meta-stable liquefaction; the latter is particularly influenced by stress history and anisotropy. This paper finds pore water pressure accumulation under load and dissipation between loads are key to cyclic degradation and furthermore to be dependent upon load duration, principal stress rotation and repetition frequency. For meta-stable, liquefiable soils in particular, inclination of principal stresses is at least as important in assessing failure risk as magnitude of stresses.

AB - Extraction of resources in remote locations can require temporary haul roads to transport extremely large, slow-moving, indivisible loads (e.g. plant, oil/gas production modules, reactors, weighing in excess of 1000 tonnes) without interruptions. Poor subgrade soils may experience larger cyclic strains and greater cyclic degradation under these conditions than under conventional roads, yet the short engineering life precludes many foundation strengthening options due to cost. As there is little research into this unique situation, this paper synthesises research from a broad range of applications to discuss implications on expected soil response. Reference is made to critical state theory and Discrete Element Method (DEM) modelling to develop fundamental concepts considering particle-scale interactions. Cyclic failure is proposed to be a kinematically unstable process, triggered by shear banding on the Hvorslev Surface, tensile liquefaction or fabric-governed meta-stable liquefaction; the latter is particularly influenced by stress history and anisotropy. This paper finds pore water pressure accumulation under load and dissipation between loads are key to cyclic degradation and furthermore to be dependent upon load duration, principal stress rotation and repetition frequency. For meta-stable, liquefiable soils in particular, inclination of principal stresses is at least as important in assessing failure risk as magnitude of stresses.

U2 - 10.1139/cgj-2015-0234

DO - 10.1139/cgj-2015-0234

M3 - Article

JO - Canadian Geotechnical Journal

JF - Canadian Geotechnical Journal

SN - 0008-3674

ER -