Active slow-moving landslides in clayey soils exhibit continuous movements generally controlled, both in the accelerating and decelerating phases, by the pore water pressure regime that, in turn, is strictly correlated to the net rainfall regime. The paper stresses the importance of a reliable groundwater model to predict these types of movements. To this aim a procedure is proposed to define the transient groundwater regime in the slope on the basis of recorded rainfall and monitoring data; the model is then used to derive the time-dependent shear strength along the main slip surfaces. The displacements at selected points along the slip surface are computed using a phenomenological (i.e. empirical) relationship between the local factor of safety and the displacement rate at those points. The procedure is employed for the analysis of a well-documented case history: the Porta Cassia landslide (central Italy).

Groundwater Modeling for the Analysis of Active Slow-Moving Landslides

CASCINI, Leonardo;CALVELLO, Michele;
2010-01-01

Abstract

Active slow-moving landslides in clayey soils exhibit continuous movements generally controlled, both in the accelerating and decelerating phases, by the pore water pressure regime that, in turn, is strictly correlated to the net rainfall regime. The paper stresses the importance of a reliable groundwater model to predict these types of movements. To this aim a procedure is proposed to define the transient groundwater regime in the slope on the basis of recorded rainfall and monitoring data; the model is then used to derive the time-dependent shear strength along the main slip surfaces. The displacements at selected points along the slip surface are computed using a phenomenological (i.e. empirical) relationship between the local factor of safety and the displacement rate at those points. The procedure is employed for the analysis of a well-documented case history: the Porta Cassia landslide (central Italy).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/3002321
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