An evaluation of strain softening of glacial tills as a result of pore pressure dynamics.

Ruth Harley, Laura Carse, David Hughes, Kaine Lynch, S. Lee Barbour

Research output: Contribution to conferencePaper

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Abstract

Deep-seated progressive failures of cuttings in heavily overconsolidated clays have been observed in the field and are well documented, especially for London Clays (Potts, Kovacevic, & Vaughan, 1997; Smethurst, Powrie, & Clarke, 2006; Take, 2003), however, the process of softening and the development of a rupture surface in other clays, including the clay fraction of glacial tills, is still to be established. Recent decades have witnessed extreme weather conditions in Northern Ireland with dry summers and wet winters. The dynamics of this pore pressure variation can trigger strength reduction and progressive plastic straining, both of which will lead to slope failure. The aim of this research is to evaluate the effect of pore pressure variations on the deformation and long-term stability of large cuttings in glacial tills in Northern Ireland. This paper outlines the overall research program and presents initial laboratory findings (Carse, 2013).
Original languageEnglish
Publication statusPublished - 2013
EventGeoMontreal 2013, 66th Canadian Geotechnical Conference - Quebec, Montreal, Canada
Duration: 29 Sep 201303 Oct 2013

Conference

ConferenceGeoMontreal 2013, 66th Canadian Geotechnical Conference
CountryCanada
CityMontreal
Period29/09/201303/10/2013

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softening
pore pressure
clay
London Clay
slope failure
research program
rupture
plastic
winter
summer
evaluation
cutting (process)

Cite this

Harley, R., Carse, L., Hughes, D., Lynch, K., & Barbour, S. L. (2013). An evaluation of strain softening of glacial tills as a result of pore pressure dynamics.. Paper presented at GeoMontreal 2013, 66th Canadian Geotechnical Conference, Montreal, Canada.
Harley, Ruth ; Carse, Laura ; Hughes, David ; Lynch, Kaine ; Barbour, S. Lee. / An evaluation of strain softening of glacial tills as a result of pore pressure dynamics. Paper presented at GeoMontreal 2013, 66th Canadian Geotechnical Conference, Montreal, Canada.
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title = "An evaluation of strain softening of glacial tills as a result of pore pressure dynamics.",
abstract = "Deep-seated progressive failures of cuttings in heavily overconsolidated clays have been observed in the field and are well documented, especially for London Clays (Potts, Kovacevic, & Vaughan, 1997; Smethurst, Powrie, & Clarke, 2006; Take, 2003), however, the process of softening and the development of a rupture surface in other clays, including the clay fraction of glacial tills, is still to be established. Recent decades have witnessed extreme weather conditions in Northern Ireland with dry summers and wet winters. The dynamics of this pore pressure variation can trigger strength reduction and progressive plastic straining, both of which will lead to slope failure. The aim of this research is to evaluate the effect of pore pressure variations on the deformation and long-term stability of large cuttings in glacial tills in Northern Ireland. This paper outlines the overall research program and presents initial laboratory findings (Carse, 2013).",
author = "Ruth Harley and Laura Carse and David Hughes and Kaine Lynch and Barbour, {S. Lee}",
year = "2013",
language = "English",
note = "GeoMontreal 2013, 66th Canadian Geotechnical Conference ; Conference date: 29-09-2013 Through 03-10-2013",

}

Harley, R, Carse, L, Hughes, D, Lynch, K & Barbour, SL 2013, 'An evaluation of strain softening of glacial tills as a result of pore pressure dynamics.', Paper presented at GeoMontreal 2013, 66th Canadian Geotechnical Conference, Montreal, Canada, 29/09/2013 - 03/10/2013.

An evaluation of strain softening of glacial tills as a result of pore pressure dynamics. / Harley, Ruth; Carse, Laura; Hughes, David; Lynch, Kaine; Barbour, S. Lee.

2013. Paper presented at GeoMontreal 2013, 66th Canadian Geotechnical Conference, Montreal, Canada.

Research output: Contribution to conferencePaper

TY - CONF

T1 - An evaluation of strain softening of glacial tills as a result of pore pressure dynamics.

AU - Harley, Ruth

AU - Carse, Laura

AU - Hughes, David

AU - Lynch, Kaine

AU - Barbour, S. Lee

PY - 2013

Y1 - 2013

N2 - Deep-seated progressive failures of cuttings in heavily overconsolidated clays have been observed in the field and are well documented, especially for London Clays (Potts, Kovacevic, & Vaughan, 1997; Smethurst, Powrie, & Clarke, 2006; Take, 2003), however, the process of softening and the development of a rupture surface in other clays, including the clay fraction of glacial tills, is still to be established. Recent decades have witnessed extreme weather conditions in Northern Ireland with dry summers and wet winters. The dynamics of this pore pressure variation can trigger strength reduction and progressive plastic straining, both of which will lead to slope failure. The aim of this research is to evaluate the effect of pore pressure variations on the deformation and long-term stability of large cuttings in glacial tills in Northern Ireland. This paper outlines the overall research program and presents initial laboratory findings (Carse, 2013).

AB - Deep-seated progressive failures of cuttings in heavily overconsolidated clays have been observed in the field and are well documented, especially for London Clays (Potts, Kovacevic, & Vaughan, 1997; Smethurst, Powrie, & Clarke, 2006; Take, 2003), however, the process of softening and the development of a rupture surface in other clays, including the clay fraction of glacial tills, is still to be established. Recent decades have witnessed extreme weather conditions in Northern Ireland with dry summers and wet winters. The dynamics of this pore pressure variation can trigger strength reduction and progressive plastic straining, both of which will lead to slope failure. The aim of this research is to evaluate the effect of pore pressure variations on the deformation and long-term stability of large cuttings in glacial tills in Northern Ireland. This paper outlines the overall research program and presents initial laboratory findings (Carse, 2013).

M3 - Paper

ER -

Harley R, Carse L, Hughes D, Lynch K, Barbour SL. An evaluation of strain softening of glacial tills as a result of pore pressure dynamics.. 2013. Paper presented at GeoMontreal 2013, 66th Canadian Geotechnical Conference, Montreal, Canada.