Luciano Picarelli, Emilia Damiano, Aldo Minardo, Lucio Olivares, Luigi Zeni
Landsliding is the macroscopic effect of the slope failure; however, it is only the final stage of an often long-lasting process of soil deformation. In many cases, slope movement remains extremely slow and undetected for a very long time; in other cases, failure is abrupt, preceded by only small deformations and followed by fast and destructive movements. The detection and interpretation of pre-failure deformations and the precise definition of the unstable area are of paramount importance for risk mitigation. To this aim, optical fibres can represent a new and efficient tool.
TC4 International Workshop on Metrology for Geotechnics 2016
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· 2016
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Josep A. Gili, Jose Moya, Jordi Corominas, Michele Crosetto, Oriol Monserrat, Guido Luzi
In this contribution we present the work carried out for monitoring the displacements of Vallcebre landslide (Eastern Pyrenees, Spain) between 1987 and 2012. The landslide, which extends over an area of 0,8 km2 and involves more than 20 million cubic meters, has experienced displacements as large as 1 m per year in some points. It has been periodically monitored since 1987, using a wide range of surface and in-hole techniques, successively: triangulation with theodolite, Terrestrial Photogrammetry, Electronic Distance Measurement, GPS, inclinometers, wire extensometers, piezometers, DInSAR...
TC4 International Workshop on Metrology for Geotechnics 2016
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· 2016
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Michele Calvello, Gaetano Pecoraro, Luca Piciullo
The paper focuses on the evaluation of the technical performance of the landslide warning system operating, at regional scale, in the Campania region. The test area of the case study is one of the eight warning zones adopted by the regional civil protection agency to warn citizens for both extreme rainfall conditions and rainfall-related landslides and floods. The simulations performed herein compare two different warning strategies, which are based on measures of cumulated rainfall over different lengths of time, using rainfall data and landslide occurrences referring to the four-year time...
TC4 International Workshop on Metrology for Geotechnics 2016
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· 2016
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Dario Peduto, Giovanni Pisciotta, Gianfranco Nicodemo, Livia Arena, Settimio Ferlisi, Giovanni Gullà, Luigi Borrelli, Gianfranco Fornaro, Diego Reale
Slow-moving landslides yearly induce huge economic loss worldwide in terms of damage to structures/infrastructures and interruption of human activities as well. Within the landslide risk management framework, the vulnerability analysis is a key step entailing procedures mostly based on the identification of the exposed elements, the damage classification and the definition of an intensity criterion. The present paper introduces a two-scale procedure for the analysis of building vulnerability to slowmoving landslides. The intensity parameter (i.e. absolute or differential settlement) derives...
TC4 International Workshop on Metrology for Geotechnics 2016
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· 2016
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Fabio Matano, Mauro Caccavale, Giuseppe Esposito, Giuseppe Maria Grimaldi, Aldo Minardo, Germana Scepi, Giovanni Zeni, Luigi Zeni, T. Caputo, R. Somma, C. Troise, G. De Natale, M. Sacchi
The paper reports the implementation of an integrated system aimed at the real -time monitoring of a series of physical parameters controlling the rock slope stability. The system has been installed on the Coroglio tuff cliff, located in the highly urbanized coastal area of Naples (Italy) at the border of the active volcanic caldera of Campi Flegrei. Preliminary results obtained during the first year of data acquisition and monitoring activi ty (December 2014 – January 2016) are also discussed on the basis of statistical models.
TC4 International Workshop on Metrology for Geotechnics 2016
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· 2016
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Olga Mavrouli, Marcel Hürlimann, Claudia Abancó, Jose Moya, Ramon Copons, Roger Ruiz-Carulla
The paper presents the experience of two instrumented sites in the Pyrenees where debris flows and rock falls occur frequently. The first one is the debris-flow monitoring system in the Rebaixader catchment, Central Pyrenees, Spain, installed since summer 2009. It consists of sensors registering meteorological and infiltration data as well as geophones, radar, ultrasonic sensors and a video camera focusing on the detection and dynamics of the flows. 24 torrential flows (debris flows and debris floods) and also 5 block falls have been detected. The second site is a recently installed rockfall...
TC4 International Workshop on Metrology for Geotechnics 2016
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Luigi Ferrigno, Giuseppe Modoni, Giovanni Betta, Paolo Croce, Erminio Salvatore
Metal-tensioned systems like bar or strand anchors may lose efficiency and eventually reach failure due to corrosion caused by aggressive ground condi tions or stray currents. Early recognition tests capable of highlighting the loss of performance would enable to undertake remediation before these effects become catastrophic. The paper analyses the efficiency of different non-invasive techniques adopted to assess the continui ty and the geometric shrinkage of metal bars. A review of the literature is initially made to illustrate potentials and defects of the different solutions providing a...
TC4 International Workshop on Metrology for Geotechnics 2016
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Claudia Meisina, Roberto Valentino, Marco Bittelli, Massimiliano Bordoni, Silvia Chersich, Maria Giuseppina Persichillo
Long-term field monitoring of slopes prone to shallow landslides can be a fundamental tool for the identification of failure conditions. The aim of this work was the development of a field monitoring system able to integrate different meteorological and hydrological tools, in order to enhance both frequency and quality of measurements. The equipment was installed on a slope susceptible to shallow landslides in north-eastern Oltrepò Pavese (Northern Italy). Some expedients were established to improve the interpretation of field data. This allowed for checking the accuracy of the data and...
TC4 International Workshop on Metrology for Geotechnics 2016
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Aldo Madaschi, Alessandro Gajo, Marco Molinari, Daniele Zonta
This work provides a detailed description of the full-scale experimental tests performed on the dynamic behavior of a shallow foundation under intermediate strains. A wind tower supported by the foundation was submitted to a snap-off test inducing free oscillations of non-negligible amplitude in the whole system. The motion induced was measured with a digital camera, seismometers and accelerometers attached to the surrounding ground surface and to the wind tower. An innovative interpretation technique based on optimizing a few meaningful parameters obtained from the recorded time histories...
TC4 International Workshop on Metrology for Geotechnics 2016
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Massimina Castiglia, Filippo Santucci de Magistris
Synthetic ground motion parameters are usually adopted for the characterization of seismic signals, because of their effectiveness in synthesize the main information about amplitude, frequency and duration of earthquakes. The influence of focal mechanism on ground motion parameters and the differences or similarities for areas characterized by different prevalent faults will be discussed in this paper. The main aim of the study is to clarify the possibility of utilization of spectrum compatible accelerograms independently by their fault typology, to derive a set of design accelerograms for...
TC4 International Workshop on Metrology for Geotechnics 2016
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· 2016
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