69 research outputs found
Rock falls impacting railway tracks. Detection analysis through an artificial intelligence camera prototype
During the last few years, several approaches have been proposed to improve early warning systems for managing geological risk
due to landslides, where important infrastructures (such as railways, highways, pipelines, and aqueducts) are exposed elements.
In this regard, an Artificial intelligence Camera Prototype (AiCP) for real-time monitoring has been integrated in a multisensor
monitoring system devoted to rock fall detection. An abandoned limestone quarry was chosen at Acuto (central Italy) as test-site
for verifying the reliability of the integratedmonitoring system. A portion of jointed rockmass, with dimensions suitable for optical
monitoring, was instrumented by extensometers. One meter of railway track was used as a target for fallen blocks and a weather
station was installed nearby. Main goals of the test were (i) evaluating the reliability of the AiCP and (ii) detecting rock blocks that
reach the railway track by the AiCP. At this aim, several experiments were carried out by throwing rock blocks over the railway
track. During these experiments, the AiCP detected the blocks and automatically transmitted an alarm signal
Approaches of data analysis from multi‐parametric monitoring systems for landslide risk management
In the last decades, several approaches were proposed accounting for early warning
systems to manage in real time the risks due to fast slope failures where important
elements, such as structures, infrastructures and cultural heritage are exposed. The
challenge of these approaches is to forecast the slope evolution, thus providing alert
levels suitable for managing infrastructures in order to mitigate the landslide risk and
reduce the “response” time for interventions.
Three different strategies can be defined in this regard: an Observation‐Based
Approach (OBA), a Statistic‐Based Approach (SBA) and a Semi‐Empirical Approach
(SEA). These approaches are focused on searching relations among destabilizing
factors and induced strain effects on rock mass.
At this aim, some experiments are being performed at different scales in the
framework of consulting activities and research projects managed by the Research
Centre for the Geological Risk (CERI) of the University of Rome “Sapienza”. These
experiments are testing different kind of sensors including extensometers, strain
gauges, rock‐thermometers, interferometers, optical cams connected to Artificial
Intelligence (AI) systems, for detecting changes in rock properties and detecting stressstrain
changes, as well as pluviometers, anemometers, hygrometers, air‐thermometers,
micro‐ or nano‐ accelerometers and piezometers for detecting possible trigger of
deformational events.
The results of this Ph.D. thesis demonstrate that the data analysis methods allowed
the identification of destabilizing actions responsible for strain effects on rock mass at
different dimensional scale and over several time‐window, from short‐ to long‐ period
time scale. Furthermore, the three approaches were to be suitable to recognize
precursor signals of rock mass deformation and demonstrated the possibility to
provide an early warning
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