We report on the results of geological, geotechnical and geophysical surveys for the characterization of a landslide, occurred in the Asti Reliefs (NW Italy) during the first ten days of March 2011, just after an exceptional meteoric event. The investigated landslide is located in San Damiano d'Asti (15 km E of Asti) and involved a hilly side, gently sloping. The hazard situation in this area regards a landslide that involved the back of a building. This landslide was caused by excavations made in the time at the toe of the slope with the aim to extend the narrow flat spaces. The contribution given by Electrical Resistivity Tomography (ERT) was essential, in the first phase of the investigation, to recognize deep and localized water seepage, otherwise undetectable. The identification of saturated clays into the slope allowed us to design the correct re-profiling of the scarps and make digging operations in safety. The use of these methods of investigation has a significant economic savings in the choice of interventions for slope stabilization.

Electrical Resistivity Tomography in Support of Geological Surveys of Landslides Involving Clay Slopes in Asti Reliefs

BARBERO, DIEGO;FORNO, Maria Gabriella;
2015

Abstract

We report on the results of geological, geotechnical and geophysical surveys for the characterization of a landslide, occurred in the Asti Reliefs (NW Italy) during the first ten days of March 2011, just after an exceptional meteoric event. The investigated landslide is located in San Damiano d'Asti (15 km E of Asti) and involved a hilly side, gently sloping. The hazard situation in this area regards a landslide that involved the back of a building. This landslide was caused by excavations made in the time at the toe of the slope with the aim to extend the narrow flat spaces. The contribution given by Electrical Resistivity Tomography (ERT) was essential, in the first phase of the investigation, to recognize deep and localized water seepage, otherwise undetectable. The identification of saturated clays into the slope allowed us to design the correct re-profiling of the scarps and make digging operations in safety. The use of these methods of investigation has a significant economic savings in the choice of interventions for slope stabilization.
21th European Meeting of Environmental and Engineering Geophysics – Near Surface Geoscience Conference
Turin
6-10 September 2015
Proceeding of the 21th European Meeting of Environmental and Engineering Geophysics – Near Surface Geoscience Conference
EAGE
Mo 21P2 01
1
5
978-94-6282-155-2
Electrical Resistivity Tomography, Geotechnical laboratory tests, Landslides, Asti Reliefs
Barbero, Diego; Forno, Maria; Naldi, Mario; Tissoni, Alberto.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1559296
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