Effects of temperature, pore fluid composition and rate of shearing on the residual shear strength of soils

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10483564" target="_blank" >RIV/00216208:11310/24:10483564 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1201/9781003431749-242" target="_blank" >https://doi.org/10.1201/9781003431749-242</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1201/9781003431749-242" target="_blank" >10.1201/9781003431749-242</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of temperature, pore fluid composition and rate of shearing on the residual shear strength of soils

Popis výsledku v původním jazyce

The residual shear strength is a crucial parameter in the post-failure behaviour of landslides. Many studies have shown that this parameter depends on the rate of shearing according to the normal stress and soil composition. Some researchers have shown that the composition of the pore fluid, which in landslide shear zones is typically an aqueous solution containing various dissolved ions, also can affect the residual shear strength. Smectites, in particular, can exhibit dramatic strengthening upon exposure to a concentrated salt solution. Few researchers have begun to evaluate the residual shear strength while also controlling the temperature during testing. Results demonstrated both strengthening and weakening upon heating, depending on soil composition. Owing to the coupled nature of hydraulic, thermal, chemical, and mechanical processes in soil, coupled effects also are expected; however, these effects are largely unexplored. We performed ring-shear experiments on pure clays and natural soils to obtain some insight into these coupled effects. We observed, for instance, that the effect of temperature fades away as the rate of shearing increases or the clay fraction decreases. We also observed some relationship between the shear rate effect and pore fluid composition. Understanding coupled processes in soils remains challenging; however, experiments may help improve our understanding of field-scale events, such as landslide reactivation and runout upon complex changes in boundary conditions.

Název v anglickém jazyce

Effects of temperature, pore fluid composition and rate of shearing on the residual shear strength of soils

Popis výsledku anglicky

The residual shear strength is a crucial parameter in the post-failure behaviour of landslides. Many studies have shown that this parameter depends on the rate of shearing according to the normal stress and soil composition. Some researchers have shown that the composition of the pore fluid, which in landslide shear zones is typically an aqueous solution containing various dissolved ions, also can affect the residual shear strength. Smectites, in particular, can exhibit dramatic strengthening upon exposure to a concentrated salt solution. Few researchers have begun to evaluate the residual shear strength while also controlling the temperature during testing. Results demonstrated both strengthening and weakening upon heating, depending on soil composition. Owing to the coupled nature of hydraulic, thermal, chemical, and mechanical processes in soil, coupled effects also are expected; however, these effects are largely unexplored. We performed ring-shear experiments on pure clays and natural soils to obtain some insight into these coupled effects. We observed, for instance, that the effect of temperature fades away as the rate of shearing increases or the clay fraction decreases. We also observed some relationship between the shear rate effect and pore fluid composition. Understanding coupled processes in soils remains challenging; however, experiments may help improve our understanding of field-scale events, such as landslide reactivation and runout upon complex changes in boundary conditions.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/LL2316" target="_blank" >LL2316: Teplotně podmíněná nestabilita svahů při změně klimatu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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 XVIII ECSMGE 2024

ISBN

978-1-03-254816-6

ISSN

—

e-ISSN

—

Počet stran výsledku

5

Strana od-do

1325-1329

Název nakladatele

CRC Press

Místo vydání

Boca Raton, FL

Místo konání akce

Lisbon

Datum konání akce

26. 8. 2024

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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