The role of infiltration processes in steep slope stability of pyroclastic granular soils: laboratory and numerical investigation |
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| Authors: | Emilia Damiano Lucio Olivares |
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| Institution: | 1.Department of Civil Engineering, CIRIAM,Seconda Università di Napoli,Aversa,Italy |
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| Abstract: | Rainfall-induced landslides on steep slopes are a common feature in much of Italy’s mountain areas covered by shallow-pyroclastic
deposits. Generally, these deposits are unsaturated and have a slope angle higher than 40°–50°; hence their stability is due
to the positive effect of matric suction on soil shear strength. During rainfall, rainwater infiltration causes a decrease
in suction, which in turn causes changes in soil mechanical and hydraulic properties, leading towards an instability process.
However, the response of pyroclastic soil slopes to rainwater infiltration is not fully understood. The aim of this study
is to link slope instability to the infiltration process on the basis of advanced geotechnical characterization, in situ monitoring
and numerical analysis calibrated through a back-analysis of well-instrumented flume tests. |
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