2021
DOI: 10.5194/gi-10-203-2021
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Observation of the rock slope thermal regime, coupled with crackmeter stability monitoring: initial results from three different sites in Czechia (central Europe)

Abstract: Abstract. This paper describes a newly designed, experimental, and affordable rock slope monitoring system. This system is being used to monitor three rock slopes in Czechia for a period of up to 2 years. The instrumented rock slopes have different lithology (sandstone, limestone, and granite), aspect, and structural and mechanical properties. Induction crackmeters monitor the dynamic of joints, which separate unstable rock blocks from the rock face. This setup works with a repeatability of measurements of 0.0… Show more

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Cited by 12 publications
(11 citation statements)
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“…Our findings align with previous work which indicates that minimum rock surface temperatures are similar to the minimum ambient temperature, whereas the maximum daily temperature peak is often about 10°C higher than the maximum ambient temperature across climates (Hall and André, 2001;McKay et al, 2009;Eppes et al, 2016). The temperature changes we observed in fractures are similar to those that have been measured at depths of ∼50 cm in the rock subsurface, which experiences less variability than the rock surface due to thermal diffusivity (Gunzburger and Merrien-Soukatchoff, 2011;Racek et al, 2021;Breytenbach, 2022).…”
Section: Temporal Scalessupporting
confidence: 91%
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“…Our findings align with previous work which indicates that minimum rock surface temperatures are similar to the minimum ambient temperature, whereas the maximum daily temperature peak is often about 10°C higher than the maximum ambient temperature across climates (Hall and André, 2001;McKay et al, 2009;Eppes et al, 2016). The temperature changes we observed in fractures are similar to those that have been measured at depths of ∼50 cm in the rock subsurface, which experiences less variability than the rock surface due to thermal diffusivity (Gunzburger and Merrien-Soukatchoff, 2011;Racek et al, 2021;Breytenbach, 2022).…”
Section: Temporal Scalessupporting
confidence: 91%
“…A more energetic thermal regime with frequent temperature changes may enhance weathering by raising the probability of rapid temperature changes and amplifying expansioncontraction cycles which drive thermal fatigue (McAllister et al, 2017). These results support the findings of Racek et al (2021) who measured rock slopes in Czechia and determined that crack movements were greatest during the spring and autumn, during which they recorded the largest oscillation in rock surface temperature. Similarly, Gómez-Heras et al ( 2006) investigated thermomechanical weathering in granite and determined that the spring and autumn seasons experience the highest frequency of large, rapid temperature changes which result in weathering.…”
Section: Seasonality Of Thermomechanical Processessupporting
confidence: 79%
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“…Figure 2 b,c show the rock wall where the monitoring system, which was proven functional at other sites [ 45 ], was established. On the rock mass was installed a series of eleven strain gauges (with different configurations explained and presented in Table 2 and Table 3 ), for the purpose of monitoring the possible plastic strain over the microfracture in a short period of two months.…”
Section: Methodsmentioning
confidence: 99%
“…The data were collected from the Požáry test site through an IoT network database and then analyzed. This system allows continuous monitoring of meteorological changes (together with the solar radiation balance), and an in-depth temperature profile up to 3 m [ 45 ]. Surface and joint dynamics were monitored using a set of electrical resistivity strain gauges (for current testing) and conventional induction crack meters.…”
Section: Methodsmentioning
confidence: 99%