Thermo-hydro-mechanical dynamics of a rock slope: Integrated field and numerical analysis at the Pozáry test site in the Czech Republic.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F25%3A00638650" target="_blank" >RIV/67985891:_____/25:00638650 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jrmge.2024.09.052" target="_blank" >https://doi.org/10.1016/j.jrmge.2024.09.052</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jrmge.2024.09.052" target="_blank" >10.1016/j.jrmge.2024.09.052</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermo-hydro-mechanical dynamics of a rock slope: Integrated field and numerical analysis at the Pozáry test site in the Czech Republic.

Popis výsledku v původním jazyce

Understanding strain and fracture evolution in rock masses under climate change is crucial for slopenstability. This study presents a fully coupled thermo-hydro-mechanical (THM) simulation of a rock slopenat the Po z ary test site in the Czech Republic, integrating field tests and laboratory analyses. The simu-nlations used the exactly measured slope geometry and incorporated a pre-existing upper slope fracture.nKey constitutive models for fluid and vapor flow, heat conduction, and porosity-dependent permeabilitynwere coupled with a viscoplastic damage model to capture the THM behavior of the rock slope. Labo-nratory tests on three rock samples (A, B, and C) with varying elastic moduli and porosities informed thenmaterial properties for three corresponding models. Simulation results showed greater thermal changesnin the upper sections of the slope due to increased exposure to thermal effects. Model A, with the highestnelastic modulus, exhibited lower initial strain changes, while Model C showed significant early strainnvariations. After 30 d, Model A experienced a sudden strain decrease due to thermal contraction-inducedndamage. The critical fractured zone (CFZ) analysis revealed that rock contraction under cooling led to annincrease in pore water pressure, exacerbating the damage. Model B highlighted the impact of geometricalnasymmetry on the propagation of the damaged zone. Over time, the thermal effects increased plasticndeformation in Model A, while Model C remained elastic and exhibited no damage. These findings havensignificant implications for assessing rock slope stability, particularly in predicting failure zones due tonpermeability reduction and pore water pressure generation.

Název v anglickém jazyce

Thermo-hydro-mechanical dynamics of a rock slope: Integrated field and numerical analysis at the Pozáry test site in the Czech Republic.

Popis výsledku anglicky

Understanding strain and fracture evolution in rock masses under climate change is crucial for slopenstability. This study presents a fully coupled thermo-hydro-mechanical (THM) simulation of a rock slopenat the Po z ary test site in the Czech Republic, integrating field tests and laboratory analyses. The simu-nlations used the exactly measured slope geometry and incorporated a pre-existing upper slope fracture.nKey constitutive models for fluid and vapor flow, heat conduction, and porosity-dependent permeabilitynwere coupled with a viscoplastic damage model to capture the THM behavior of the rock slope. Labo-nratory tests on three rock samples (A, B, and C) with varying elastic moduli and porosities informed thenmaterial properties for three corresponding models. Simulation results showed greater thermal changesnin the upper sections of the slope due to increased exposure to thermal effects. Model A, with the highestnelastic modulus, exhibited lower initial strain changes, while Model C showed significant early strainnvariations. After 30 d, Model A experienced a sudden strain decrease due to thermal contraction-inducedndamage. The critical fractured zone (CFZ) analysis revealed that rock contraction under cooling led to annincrease in pore water pressure, exacerbating the damage. Model B highlighted the impact of geometricalnasymmetry on the propagation of the damaged zone. Over time, the thermal effects increased plasticndeformation in Model A, while Model C remained elastic and exhibited no damage. These findings havensignificant implications for assessing rock slope stability, particularly in predicting failure zones due tonpermeability reduction and pore water pressure generation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/SS02030023" target="_blank" >SS02030023: Horninové prostředí a suroviny</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Rock Mechanics and Geotechnical Engineering

ISSN

1674-7755

e-ISSN

2589-0417

Svazek periodika

17

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

17

Strana od-do

4745-4761

Kód UT WoS článku

001553587900004

EID výsledku v databázi Scopus

2-s2.0-105010294578