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Simulation of liquefaction and consequences of interbedded soil deposits using CPT data
Published in Michael A. Hicks, Federico Pisanò, Joek Peuchen, Cone Penetration Testing 2018, 2018
In a thin interbedded soil layer profile, the change of soil type from one soil layer to another (e.g., from a sand to a clay) is called a transition zone. In liquefaction analysis, CPT data within the thin transition zone can result in misinterpretation of soil type, which may, in turn, suggest that the soil in the transition zone has the potential to liquefy, resulting in conservative additional calculated post-earthquake deformations (Robertson, 2011). The transition zone can be automatically detected and removed with computer-based CPT analysis software using following criteria: () Transitionzone=|(Ic)j−(Ic)i||Zj−Zi|>(ΔIcΔT)cri
A Geotechnical Analysis to Assess the Effect of Slow-Moving Landslides on Historic Masonry Churches
Published in International Journal of Architectural Heritage, 2023
Chiara Ferrero, Riccardo Berardi, Chiara Calderini, Ludovica Cambiaggi, Rita Vecchiattini
The church and the village of Cassingheno are located on a medium-low inclined slope (about 15°-20°), which is likely to be the accumulation zone of a relict deep slide. Some boreholes performed in past investigations (Geoportale Regione Liguria 2020) allowed the stratigraphical sequence of the soil to be identified. The soil consists of a thick layer (10–15 m) of very heterogeneous blanket (sand with clasts, clayey silts) separated from the bedrock (shales, hereafter named bedrock D) by a transition zone (1–3 m) of weathered rock (hereafter named transition C). The ground water table, which shows oscillations according to the seasonality, is situated inside the blanket (Cambiaggi et al. 2021), as indicated by piezometric readings.