The University of Southampton
University of Southampton Institutional Repository

The seasonal ratcheting of clay cut slopes in response to seasonal weather cycles

The seasonal ratcheting of clay cut slopes in response to seasonal weather cycles
The seasonal ratcheting of clay cut slopes in response to seasonal weather cycles
Many cut slopes in the UK are in the later stages of their operational life but continue to support road and rail transportation networks. Some of these slopes experienced delayed, deep-seated, first-time failures between 10 and 50 years after construction. However, some continue to seasonally deform and then fail at shallow depth due to the process of seasonal, downslope ratcheting. This paper reviews the evidence for seasonally-induced, downslope ratcheting movements in clay cut slopes, gathered from physical model tests, in-situ monitoring and numerical simulations. The evidence shows that seasonal ratcheting is an increasingly dominant mechanism of slope deformation and ultimate failure for some high-plasticity clay cut slopes as they are exposed to many seasonal weather cycles. The rate of downslope ratcheting depends on the slope age (i.e., number of seasonal weather cycles since construction), the slope geometry (i.e., slope height and angle) and the strain-softening behaviour of the slope material (e.g., as observed in stiff, high-plasticity clays). This rate, when measured, can be used to inform monitoring and management strategies for old, clay cut slopes (e.g., ageing railway and highway cuttings) by identifying the slopes that are prone to seasonally-induced, downslope ratcheting towards the end of their operational life.
Cut slopes, Slope stability, Strain softening, Downslope ratcheting
Briggs, Kevin
67a32b3d-d802-4c8e-a309-360a4a31074d
Trinidad Gonzalez, Yuderka
3eadcc49-30ce-4152-b34f-5cfa586f8a34
Morsy, Amr
4d4047f4-5c9e-4722-88e0-eaa3ba384100
Smith, Alister
3b634a05-8699-4205-a770-2c9b444e289b
El-Hamalawi, Ashraf
b289de62-636c-4651-8b82-62fc4e836742
Blake, Anthony
e0438bea-cfc4-4373-b100-8b9768ddc56f
Smethurst, Joel
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Helm, P.R.
1faf99e9-184c-4034-acc2-fad6114ea54e
Glendinning, Stephanie
c0be9556-3210-4794-a36b-a483258a4b45
Briggs, Kevin
67a32b3d-d802-4c8e-a309-360a4a31074d
Trinidad Gonzalez, Yuderka
3eadcc49-30ce-4152-b34f-5cfa586f8a34
Morsy, Amr
4d4047f4-5c9e-4722-88e0-eaa3ba384100
Smith, Alister
3b634a05-8699-4205-a770-2c9b444e289b
El-Hamalawi, Ashraf
b289de62-636c-4651-8b82-62fc4e836742
Blake, Anthony
e0438bea-cfc4-4373-b100-8b9768ddc56f
Smethurst, Joel
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Helm, P.R.
1faf99e9-184c-4034-acc2-fad6114ea54e
Glendinning, Stephanie
c0be9556-3210-4794-a36b-a483258a4b45

Briggs, Kevin, Trinidad Gonzalez, Yuderka, Morsy, Amr, Smith, Alister, El-Hamalawi, Ashraf, Blake, Anthony, Smethurst, Joel, Helm, P.R. and Glendinning, Stephanie (2023) The seasonal ratcheting of clay cut slopes in response to seasonal weather cycles. Geo-Resilience Conference 2023, , Cardiff, United Kingdom. 28 Mar - 28 Nov 2023. 7 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Many cut slopes in the UK are in the later stages of their operational life but continue to support road and rail transportation networks. Some of these slopes experienced delayed, deep-seated, first-time failures between 10 and 50 years after construction. However, some continue to seasonally deform and then fail at shallow depth due to the process of seasonal, downslope ratcheting. This paper reviews the evidence for seasonally-induced, downslope ratcheting movements in clay cut slopes, gathered from physical model tests, in-situ monitoring and numerical simulations. The evidence shows that seasonal ratcheting is an increasingly dominant mechanism of slope deformation and ultimate failure for some high-plasticity clay cut slopes as they are exposed to many seasonal weather cycles. The rate of downslope ratcheting depends on the slope age (i.e., number of seasonal weather cycles since construction), the slope geometry (i.e., slope height and angle) and the strain-softening behaviour of the slope material (e.g., as observed in stiff, high-plasticity clays). This rate, when measured, can be used to inform monitoring and management strategies for old, clay cut slopes (e.g., ageing railway and highway cuttings) by identifying the slopes that are prone to seasonally-induced, downslope ratcheting towards the end of their operational life.

Text
Briggs et al (2023) GeoResilience 2023 paper - Accepted Manuscript
Download (662kB)

More information

Published date: 28 March 2023
Venue - Dates: Geo-Resilience Conference 2023, , Cardiff, United Kingdom, 2023-03-28 - 2023-11-28
Keywords: Cut slopes, Slope stability, Strain softening, Downslope ratcheting

Identifiers

Local EPrints ID: 484021
URI: http://eprints.soton.ac.uk/id/eprint/484021
PURE UUID: 4532b211-5f2f-4bc8-9398-d915486b0c46

Catalogue record

Date deposited: 09 Nov 2023 17:32
Last modified: 10 May 2024 17:02

Export record

Contributors

Author: Kevin Briggs
Author: Yuderka Trinidad Gonzalez
Author: Amr Morsy
Author: Alister Smith
Author: Ashraf El-Hamalawi
Author: Anthony Blake
Author: Joel Smethurst
Author: P.R. Helm
Author: Stephanie Glendinning

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×