The paper deals with the mechanical behaviour of an unsaturated air-fall volcanic (pyroclastic) soil, originated by the explosive eruptions of theVesuvius volcano in southern Italy. Some experimental laboratory tests are described with special reference to theWater Retention Curve (WRC) and the Critical State Line (CSL); and, a series ofwetting-collapse suction-controlled oedometric tests are illustrated. Then, a Generalized Plasticity constitutive model is calibrated referring both theWRCand CSL, and is used to simulate the experimental results of the wetting-collapse tests. The numerical results match the experimental evidences reasonably well, because the constitutive model properly simulates the suction-related bonding effect among the solid grains.

Experimental investigation and constitutive modelling for an unsaturated pyroclastic soil.

CUOMO, SABATINO;MOSCARIELLO, MARIAGIOVANNA;FORESTA, Vito;
2015

Abstract

The paper deals with the mechanical behaviour of an unsaturated air-fall volcanic (pyroclastic) soil, originated by the explosive eruptions of theVesuvius volcano in southern Italy. Some experimental laboratory tests are described with special reference to theWater Retention Curve (WRC) and the Critical State Line (CSL); and, a series ofwetting-collapse suction-controlled oedometric tests are illustrated. Then, a Generalized Plasticity constitutive model is calibrated referring both theWRCand CSL, and is used to simulate the experimental results of the wetting-collapse tests. The numerical results match the experimental evidences reasonably well, because the constitutive model properly simulates the suction-related bonding effect among the solid grains.
978-1-138-02886-9
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4650763
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