Effect of particle crushing- and thermally induced pressurization on rockslide mobility

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10476858" target="_blank" >RIV/00216208:11310/23:10476858 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~F2dmazVm7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~F2dmazVm7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10346-023-02053-3" target="_blank" >10.1007/s10346-023-02053-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of particle crushing- and thermally induced pressurization on rockslide mobility

Popis výsledku v původním jazyce

Large rockslides often exhibit long runout, suggesting a low mobilized shear resistance within their shear zone. Various weakening mechanisms are proposed to explain the hypermobility of rockslides. To describe a specific event, a single mechanism is usually invoked, which is thought to dominate the entire runout. Herein, with reference to largely coherent landslides with a water-saturated shear zone, we explore how the combined action of particle crushing and thermal pressurization might cause hypermobility by promoting pore-water pressure buildup. We develop a simple model based on mass and energy conservation for a block sliding on an inclined plane that we solve numerically. Parameter study is also applied to the model. The results indicated that these two mechanisms could have comparable magnitude, and their synergy might promote longer runout. We suggest that particle crushing could control the initial rapid acceleration, but its contribution may gradually fade as an ultimate particle size distribution is attained and thermally induced pressurization may become dominant. Particle crushing may lower the permeability and compressibility of the shear-zone material, enhancing the subsequent pressurization and runout.

Název v anglickém jazyce

Effect of particle crushing- and thermally induced pressurization on rockslide mobility

Popis výsledku anglicky

Large rockslides often exhibit long runout, suggesting a low mobilized shear resistance within their shear zone. Various weakening mechanisms are proposed to explain the hypermobility of rockslides. To describe a specific event, a single mechanism is usually invoked, which is thought to dominate the entire runout. Herein, with reference to largely coherent landslides with a water-saturated shear zone, we explore how the combined action of particle crushing and thermal pressurization might cause hypermobility by promoting pore-water pressure buildup. We develop a simple model based on mass and energy conservation for a block sliding on an inclined plane that we solve numerically. Parameter study is also applied to the model. The results indicated that these two mechanisms could have comparable magnitude, and their synergy might promote longer runout. We suggest that particle crushing could control the initial rapid acceleration, but its contribution may gradually fade as an ultimate particle size distribution is attained and thermally induced pressurization may become dominant. Particle crushing may lower the permeability and compressibility of the shear-zone material, enhancing the subsequent pressurization and runout.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Landslides

ISSN

1612-510X

e-ISSN

1612-5118

Svazek periodika

20

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

12

Strana od-do

1535-1546

Kód UT WoS článku

000951307100001

EID výsledku v databázi Scopus

2-s2.0-85150616344