Investigating the Potential of Infrared Thermography to Inform on Physical and Mechanical Properties of Soils for Geotechnical Engineering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F22%3A00564750" target="_blank" >RIV/67985891:_____/22:00564750 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/22:10448874

Výsledek na webu

<a href="https://www.mdpi.com/2072-4292/14/16/4067" target="_blank" >https://www.mdpi.com/2072-4292/14/16/4067</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/rs14164067" target="_blank" >10.3390/rs14164067</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigating the Potential of Infrared Thermography to Inform on Physical and Mechanical Properties of Soils for Geotechnical Engineering

Popis výsledku v původním jazyce

Knowledge of physical and mechanical properties of geomaterials is fundamental toncharacterise their response to external forcings (mechanical, climatic) at various scales. This is true, forninstance, in slope stability assessments, civil engineering works, and agriculture. The direct evaluationnof these properties in situ can be difficult, especially in inaccessible or vast areas, and so can be thensampling and subsequent testing in the laboratory—where ensuring the representativeness of thenacquired data at the scale of analysis poses an additional challenge. Thus, empirical correlations withnmore readily determinable quantities remain a powerful and practical tool. Recently, several sensors,nable to inform on various geomaterial properties, have been developed. However, applications haventypically targeted rocks, while studies on uncemented geomaterials (soils, geotechnically speaking)nare lacking. Here, we propose a simple method to evaluate the porosity and critical state frictionnangle of soils via infrared thermography, consisting of periodic acquisitions of images in infrarednwavelengths. To demonstrate the method’s capability, we analysed the cooling behaviour of samplesnof bentonite, kaolin, and sand (for which an extensive characterisation exists in the literature), afterncompaction to different porosities and pre-heating in an oven. We interpreted the results by seekingnthe optimal time interval for which a cooling rate index (CRI) could be defined, which is best linkednwith the target property. We found that the CRI correlates very well with the critical state frictionnangle (R2 > 0.85) and that different materials show unique and strong (R2 = 0.86–0.99) relationshipsnbetween their porosity and the CRI, which also varies in a material-specific fashion according tonthe explored time interval. Although a systematic investigation on a wide range of natural soilsnis warranted, we argue that our method can be highly informative and could be used to calibratenremote sensing-based full-scale implementations in situ for various purposes.n

Název v anglickém jazyce

Investigating the Potential of Infrared Thermography to Inform on Physical and Mechanical Properties of Soils for Geotechnical Engineering

Popis výsledku anglicky

Knowledge of physical and mechanical properties of geomaterials is fundamental toncharacterise their response to external forcings (mechanical, climatic) at various scales. This is true, forninstance, in slope stability assessments, civil engineering works, and agriculture. The direct evaluationnof these properties in situ can be difficult, especially in inaccessible or vast areas, and so can be thensampling and subsequent testing in the laboratory—where ensuring the representativeness of thenacquired data at the scale of analysis poses an additional challenge. Thus, empirical correlations withnmore readily determinable quantities remain a powerful and practical tool. Recently, several sensors,nable to inform on various geomaterial properties, have been developed. However, applications haventypically targeted rocks, while studies on uncemented geomaterials (soils, geotechnically speaking)nare lacking. Here, we propose a simple method to evaluate the porosity and critical state frictionnangle of soils via infrared thermography, consisting of periodic acquisitions of images in infrarednwavelengths. To demonstrate the method’s capability, we analysed the cooling behaviour of samplesnof bentonite, kaolin, and sand (for which an extensive characterisation exists in the literature), afterncompaction to different porosities and pre-heating in an oven. We interpreted the results by seekingnthe optimal time interval for which a cooling rate index (CRI) could be defined, which is best linkednwith the target property. We found that the CRI correlates very well with the critical state frictionnangle (R2 > 0.85) and that different materials show unique and strong (R2 = 0.86–0.99) relationshipsnbetween their porosity and the CRI, which also varies in a material-specific fashion according tonthe explored time interval. Although a systematic investigation on a wide range of natural soilsnis warranted, we argue that our method can be highly informative and could be used to calibratenremote sensing-based full-scale implementations in situ for various purposes.n

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Remote Sensing

ISSN

2072-4292

e-ISSN

2072-4292

Svazek periodika

14

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

4067

Kód UT WoS článku

000845783500001

EID výsledku v databázi Scopus

2-s2.0-85137784071