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Sensors 2018, 18(7), 2221; https://doi.org/10.3390/s18072221

Thermal Response of Jointed Rock Masses Inferred from Infrared Thermographic Surveying (Acuto Test-Site, Italy)

1
Earth Sciences Department of “Sapienza”, University of Rome and CERI—Research Centre for Geological Risks, P.le Aldo Moro n.5, I-00185 Rome, Italy
2
NHAZCA S.r.L., Spin-off Company of “Sapienza” University of Rome, Via Vittorio Bachelet n.12, I-00185 Rome, Italy
*
Authors to whom correspondence should be addressed.
Received: 12 June 2018 / Revised: 2 July 2018 / Accepted: 2 July 2018 / Published: 10 July 2018
(This article belongs to the Special Issue Advances in Infrared Imaging: Sensing, Exploitation and Applications)
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Abstract

The Mediterranean region is affected by considerable daily and seasonal temperature variations due to intense solar radiation. In mid-seasons, thermal excursions can exceed tens of degrees thus influencing the long-term behaviour of jointed rock masses acting as a preparatory factor for rock slope instabilities. In order to evaluate the thermal response of a densely jointed rock-block, monitoring has been in operation since 2016 by direct and remote sensing techniques in an abandoned quarry in Acuto (central Italy). Monthly InfraRed Thermographic (IRT) surveys were carried out on its exposed faces and along sections of interest across monitored main joints. The results highlight the daily and seasonal cyclical behaviour, constraining amplitudes and rates of heating and cooling phases. The temperature time-series revealed the effect of sun radiation and exposure on thermal response of the rock-block, which mainly depends on the seasonal conditions. The influence of opened joints in the heat propagation is revealed by the differential heating experienced across it, which was verified under 1D and 2D analysis. IRT has proved to be a valid monitoring technique in supporting traditional approaches, for the definition of the surficial temperature distribution on rock masses or stone building materials. View Full-Text
Keywords: IR-thermography; rock masses; slope stability; thermal behaviour; thermomechanics IR-thermography; rock masses; slope stability; thermal behaviour; thermomechanics
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Fiorucci, M.; Marmoni, G.M.; Martino, S.; Mazzanti, P. Thermal Response of Jointed Rock Masses Inferred from Infrared Thermographic Surveying (Acuto Test-Site, Italy). Sensors 2018, 18, 2221.

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