Temperature and Rate Effects on the Residual Shear Strength of Clays: A State of the Art

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10488844" target="_blank" >RIV/00216208:11310/24:10488844 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.18485/resylab.2024.6.ch37" target="_blank" >https://doi.org/10.18485/resylab.2024.6.ch37</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.18485/resylab.2024.6.ch37" target="_blank" >10.18485/resylab.2024.6.ch37</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature and Rate Effects on the Residual Shear Strength of Clays: A State of the Art

Popis výsledku v původním jazyce

The temperature within a landslide&apos;s shear zone can undergo changes due to internal processes such as frictional heating and chemical reactions - the magnitude of which can be particularly relevant during fast runout phases in large landslides. Alterations in boundary conditions, including heat transfer from the bedrock or ground surface, but also groundwater flows and changes in vegetation cover can contribute to these temperature variations, over timeframes especially relevant to shallow, slow-moving landslides. The hydro-mechanical properties of soils, particularly those rich in clay minerals, exhibit dependency on temperature. Studies indicate that the residual shear strength, a crucial parameter in reactivated landslides, can vary significantly within typical temperature ranges in landslide shear zones in temperate climates. The literature also highlights the influence of the rate of shearing on the shear strength parameters of soils, including the residual shear strength, with the soil&apos;s mineral composition controlling rate strengthening and weakening behaviours in slow to rapid landslides. This contribution summarises the state of knowledge and presents recent findings from ring-shear experiments which indicate the coupled nature of temperature- and rate-dependence of the residual shear strength, which may play a substantial role especially in shallow clay landslides. This influence is particularly noteworthy in the context of climate change, emphasizing the need for explicit consideration in modeling efforts.

Název v anglickém jazyce

Temperature and Rate Effects on the Residual Shear Strength of Clays: A State of the Art

Popis výsledku anglicky

The temperature within a landslide&apos;s shear zone can undergo changes due to internal processes such as frictional heating and chemical reactions - the magnitude of which can be particularly relevant during fast runout phases in large landslides. Alterations in boundary conditions, including heat transfer from the bedrock or ground surface, but also groundwater flows and changes in vegetation cover can contribute to these temperature variations, over timeframes especially relevant to shallow, slow-moving landslides. The hydro-mechanical properties of soils, particularly those rich in clay minerals, exhibit dependency on temperature. Studies indicate that the residual shear strength, a crucial parameter in reactivated landslides, can vary significantly within typical temperature ranges in landslide shear zones in temperate climates. The literature also highlights the influence of the rate of shearing on the shear strength parameters of soils, including the residual shear strength, with the soil&apos;s mineral composition controlling rate strengthening and weakening behaviours in slow to rapid landslides. This contribution summarises the state of knowledge and presents recent findings from ring-shear experiments which indicate the coupled nature of temperature- and rate-dependence of the residual shear strength, which may play a substantial role especially in shallow clay landslides. This influence is particularly noteworthy in the context of climate change, emphasizing the need for explicit consideration in modeling efforts.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA24-12316S" target="_blank" >GA24-12316S: Sesuvy v měnícím se klimatu: vliv teploty na náchylnost a nebezpečí v mírném klimatu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 6th Regional Symposium on Landslides in the Adriatic-Balkan Region

ISBN

978-86-7352-402-3

ISSN

—

e-ISSN

—

Počet stran výsledku

5

Strana od-do

247-251

Název nakladatele

University of Belgrade, Faculty of Mining and Geology

Místo vydání

Beograd

Místo konání akce

Belgrade, Serbia

Datum konání akce

15. 4. 2024

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—