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.
NHAZCA S.r.L., Spin-off Company of "Sapienza" University of Rome, Via Vittorio Bachelet n.12, I-00185 Rome, Italy.
Sensors (Basel). 2018 Jul 10;18(7):2221. doi: 10.3390/s18072221.
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 amplitude 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.
地中海地区由于强烈的太阳辐射，每天和季节性的温度变化都很大。在季节中期，热冲击可能会超过数十度，从而影响作为岩石边坡不稳定的预备因素的节理岩体的长期行为。为了评估密集节理岩块的热响应，自 2016 年以来，在意大利中部的阿库托（Acuto）一个废弃采石场，通过直接和遥感技术进行了监测。对其暴露面以及沿监测主要节理的感兴趣的部分进行了每月的红外热成像（IRT）测量。结果突出了每日和季节性循环行为，限制了加热和冷却阶段的幅度和速率。温度时间序列显示了太阳辐射和暴露对岩块热响应的影响，这主要取决于季节性条件。开放节理对热传播的影响通过其经历的不同加热来揭示，在一维和二维分析中得到了验证。IRT 已被证明是一种有效的监测技术，可以支持传统方法，用于确定岩体或石材建筑材料的表面温度分布。
