Characterization of soil deformation due to blast-induced liquefaction by UAV-based photogrammetry and terrestrial laser scanning |
| |
Authors: | Arianna Pesci Sara Amoroso Luca Minarelli |
| |
Affiliation: | 1. Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italyhttps://orcid.org/0000-0003-1863-3132;2. Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma 1, L’Aquila, Italyhttps://orcid.org/0000-0001-5835-079X;3. Geotema srl, Spin-Off Università di Ferrara, Ferrara, FE, Italyhttps://orcid.org/0000-0003-3602-9975 |
| |
Abstract: | ABSTRACTSoil liquefaction due to an earthquake can lead to permanent soil deformation and reduction of load-bearing capacity that in turn could act on building stability. Since a quantitative evaluation of post-liquefaction settlements is often very difficult, field scale liquefaction tests, carried out under controlled conditions, such as blast tests, are used to perform a correct quantitative analysis of the liquefaction phenomena. Among the significant parameters related to a blast test, there are the geometric ones, i.e. the extension of the area affected by the blast-induced liquefaction and the corresponding vertical displacements. This article shows the results of a blast test carried out at a trial site located in Mirabello (Ferrara, Italy) from a remote-sensing perspective. Data provided by aerial Structure-from-Motion photogrammetry, supported by terrestrial laser scanning measurements, were used to evaluate the soil deformation that, in the specific case study, aided a geological/geotechnical interpretation of the blast test results. In general, the proposed method can be used to characterize areas affected by blast-induced liquefaction, including those cases where blasting is used as ground improvement technique aimed at mitigating the seismic hazard. |
| |
Keywords: | |
|
|