Surface displacements of two landslides evaluated by GPS and inclinometer systems: a case study in Southern Apennines, Italy |
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| Authors: | Stefano Calcaterra Claudio Cesi Caterina Di Maio Piera Gambino Katia Merli Margherita Vallario Roberto Vassallo |
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| Institution: | (1) Servizio Geologico d’ Italia, Dipartimento Difesa del Suolo, Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA), Via Curtatone, 3, 00185 Rome, Italy;(2) Dipartimento di Strutture, Geotecnica, Geologia applicata, Universit? della Basilicata, Viale dell’Ateneo Lucano, 10, 85100 Potenza, Italy; |
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| Abstract: | This paper reports experimental data on surface and deep displacements evaluated by means of GPS stations and inclinometers
in two rototranslational deep landslides in a clayey slope of the Italian Southern Apennines. The displacements of the landslides
cause continuous damage to buildings and infrastructures. To study these phenomena and control their effects, the local public
administration provided financial support for a geotechnical investigation that started in 2004. Laboratory tests, in situ
pore pressure and inclinometer measurements were carried out. In July 2006, systems of fixed-in-place inclinometer probes
with continuous data acquisition were installed in two of the eleven guide casings, in correspondence to the slip surfaces
detected by previous periodical measurements. In the meanwhile, a GPS network was installed, consisting in six permanent stations
and ten non-permanent ones. Among the latter, five were installed on the top of five inclinometer casings. The experimental
results show that, in the case under study, the surface displacements evaluated by means of the GPS stations are consistent
with the surface displacements evaluated by means of the inclinometer measurements. This implies mutual data validation, availability
of considerable amount of continuous data, as well as monitoring continuity when, for some reason, one of the instruments
goes out of use. |
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