An inter-disciplinary and multi-scale approach to assess the spatial variability of ground motion for seismic microzonation: the case study of Cavezzo municipality in Northern Italy

Lai, Carlo G.; Poggi, Valerio; Famà, A.; Zuccolo, Elisa; Bozzoni, Francesca; Meisina, Claudia; Bonì, Roberta; Martelli, Luca; Massa, Marco; Mascandola, Claudia; Petronio, Lorenzo; Affatato, Alessandro; Baradello, Luca; Castaldini, Doriano; Cosentini, Renato Maria

doi:10.1016/j.enggeo.2020.105722

Cited by 24 publications

(11 citation statements)

References 24 publications

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“…For the geotechnical characterization of the site, data from previous field campaigns were collected, and new investigations were performed [34]. Overall, the data consist of borehole logs, mechanic, electric, seismic cone penetration tests (CPTm CPTu, and SCPTu), and laboratory tests, such as grain size distribution curves and Atterberg limits.…”

Section: Geotechnical Investigationsmentioning

confidence: 99%

3D Engineering Geological Modeling to Investigate a Liquefaction Site: An Example in Alluvial Holocene Sediments in the Po Plain, Italy

et al. 2022

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Liquefaction-induced surface manifestations are the result of a complex geological–geotechnical phenomenon, driven by several controlling factors. We propose a multidisciplinary methodological approach, involving engineering geologists, geomorphologists, sedimentologists, and geotechnical engineers, to build a 3D engineering geological model for liquefaction assessment studies. The study area is Cavezzo (Po Plain, Italy), which is a municipality hit by superficial liquefaction manifestations during the Emilia seismic crisis of May–June 2012. The site is characterized by a Holocene alluvial sequence of the floodplain, fluvial channel, and crevasse splay deposits prone to liquefaction. The integration of different geotechnical investigations, such as boreholes, CPTm, CPTu, and laboratory tests, allowed us to recognize potentially liquefiable lithological units, crucial for hazard assessment studies. The resulting 3D engineering geological model reveals a strict correlation of co-seismic surface manifestations with buried silty sands and sandy silts within the shallow 10 m in fluvial channel setting, which is capped and laterally confined by clayey and silty deposits.

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Section: Geotechnical Investigationsmentioning

confidence: 99%

3D Engineering Geological Modeling to Investigate a Liquefaction Site: An Example in Alluvial Holocene Sediments in the Po Plain, Italy

et al. 2022

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“…This led to the definition of different realizations of 1D seismo-stratigraphic profiles at each of the 3052 nodes of a grid with a 0.001 degrees spatial resolution (about 100 meters) covering the Cavezzo territory. The use of such approximation appears justified by the rather smooth lateral variation of the geophysical properties expected across the study area, as highlighted in Lai et al (2020). Overall, 11 seismo-stratigraphic models were defined at each of the 3052 nodes.…”

Section: Building a Geotechnical-seismo-stratigraphic Model Of The Subsoil Of Cavezzomentioning

confidence: 99%

“…Overall, 11 seismo-stratigraphic models were defined at each of the 3052 nodes. The interested reader can refer to Lai et al (2020) for more details.…”

Section: Building a Geotechnical-seismo-stratigraphic Model Of The Subsoil Of Cavezzomentioning

confidence: 99%

Technical guidelines for the assessment of earthquake induced liquefaction hazard at urban scale

Lai

Bozzoni

Conca

et al. 2020

Bull Earthquake Eng

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Microzonation for earthquake-induced liquefaction hazard is the subdivision of a territory at a municipal or submunicipal scale in areas characterized by the same probability of liquefaction manifestation for the occurrence of an earthquake of specified intensity.The liquefaction hazard at a site depends on the severity of expected ground shaking as well as on the susceptibility to liquefaction of that site. This in turn depends on geological, geomorphological, hydrogeological and geotechnical predisposing factors. Thus, liquefaction hazard implies the existence of territories characterized by a moderate to high level of intensity of expected ground shaking. Microzonation charts for ground shaking and liquefaction hazard play a key role for the mitigation of seismic risk of an urban centre as they provide a valuable tool for the implementation of prevention strategies and land use planning. The LIQUEFACT project fully addressed the problem of microzoning a territory for earthquake-induced liquefaction hazard in a specific work package. Four municipal testing areas were selected across Europe as peculiar case studies where to construct microzonation charts for earthquake-induced liquefaction hazard. They are located in Emilia-Romagna region (Italy), Lisbon metropolitan area (Portugal), Brežice territory (Slovenia) and Marmara region (Turkey). Their location was identified based on the following criteria: severity of expected seismic hazard, availability of geological and geotechnical data, presence of liquefiable soil deposits, documented cases of liquefaction manifestations occurred in historical earthquakes, representativeness of different geological settings, density of population in selected areas (exposure). This paper illustrates the general procedure developed in LIQUEFACT for the assessment of earthquake-induced liquefaction hazard at urban scale and presents the main achievements of the microzonation studies carried out at the four previously mentioned European testbeds. Since the microzonation studies have been carried out using a shared framework and methodology, this paper has the ambition to serve as technical guidelines for updating the standards and the operational criteria currently used in different countries worldwide to construct seismic microzonation maps of liquefaction hazard. Keywords Liquefaction • Earthquake • Microzonation • Guidelines • LIQUEFACT projectsite-specific geotechnical investigations with pre-existing geological and geotechnical data from public and private sources.Existing information on quaternary deposits and man-made landfills, geomorphological maps, trench pits, boreholes and piezometric monitoring data, shall be stored and analysed in a georeferenced (GIS) environment to identify homogeneous lithostratigraphic units susceptible to liquefaction. These data shall be complemented with field and laboratory geotechnical and geophysical information from pre-existing investigation campaigns. This will eventually allow to plan and implement the complementary experimental investi...

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“…The evaluation of potential liquefaction is a twostep process that involves: (a) the evaluation of liquefaction susceptibility of the soil at a specific location; (b) the evaluation of liquefaction probability for a given level of amplitude and duration of ground shaking [6].…”

Section: Protocol For Liquefaction Hazard Analysismentioning

confidence: 99%

“…Liquefaction demand expresses the liquefactioninduced ground deformation beneath an asset (individual building/CI asset, portfolio of buildings/distributed infrastructure assets, etc.). In the LRG software, the sub-protocol for liquefaction demand analysis is implemented by incorporating methodologies and the required parameters that allow the computation of ground deformation in terms of intensity measure such as Sa(T1), LSN, as well as in terms of modes of permanent ground displacement [6].…”

Section: Protocol For Liquefaction Hazard Analysismentioning

confidence: 99%

The LRG Software for liquefaction mitigation planning and decision support

Meslem

Iversen

Lang

et al. 2019

IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management

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LIQUEFACT Reference Guide (LRG) software is one of the main products of the LIQUEFACT, a multidisciplinary project funded under the European Commission's Horizon 2020 framework program. The software, which incorporates both data and methodologies collected and elaborated in the project's various work packages, has been developed for liquefaction mitigation planning and decision support, able to estimate and predict the likely consequences of Earthquake-Induced Liquefaction Disaster (EILD) to the most vulnerable region of Europe. In contrast to other seismic risk assessment software tools, the LRG software is targeting a wider range of user groups with different levels of technical background (urban planners, facility managers, structural and geotechnical engineers, or seismic risk modelers) as well as requirements. In doing so, the LRG software toolbox shall allow users assessing the liquefaction-related risk as well as assisting them in liquefaction mitigation planning.

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An inter-disciplinary and multi-scale approach to assess the spatial variability of ground motion for seismic microzonation: the case study of Cavezzo municipality in Northern Italy

Cited by 24 publications

References 24 publications

3D Engineering Geological Modeling to Investigate a Liquefaction Site: An Example in Alluvial Holocene Sediments in the Po Plain, Italy

3D Engineering Geological Modeling to Investigate a Liquefaction Site: An Example in Alluvial Holocene Sediments in the Po Plain, Italy

Technical guidelines for the assessment of earthquake induced liquefaction hazard at urban scale

The LRG Software for liquefaction mitigation planning and decision support

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