Geotechnical characterization of a landslide in a Blue Clay slope |
| |
Authors: | Caterina Di Maio Roberto Vassallo |
| |
Institution: | (1) Dipartimento di Strutture, Geotecnica, Geologia Applicata (DiSGG), Universit? degli Studi della Basilicata, Contrada Macchia Romana, 85100 Potenza, Italy |
| |
Abstract: | This paper describes the results of an experimental, as well as theoretical, analysis of a landslide in a clay slope at the
margin of a small town of Southern Italy, whose reactivation of 1998 caused severe damages to some structures. To protect
the upslope urban area, an anchored diaphragm wall and a drainage system were constructed in 2001. In the meantime, in order
to understand the processes which caused the reactivation, a Department of the Basilicata Administrative Region provided financial
support to a geotechnical investigation. Laboratory tests on undisturbed and reconstituted specimens, in situ pore pressure
and deep displacement measurements were carried out. Both experimental and theoretical in situ water content (and porosity)
profiles were determined. Theoretical analyses of pore pressure distribution and stability analyses were carried out. The
influence of the drainage system on the slope safety factor was evaluated. Experimental and theoretical data suggest that
a first time process occurred in the lower part of the landslide system. The upper part moved on pre-existing surfaces on
which an average shear strength close to the residual strength was available. Noticeable water content increase was found
around some of these surfaces. Erosion at the toe of the landslide was the probable cause of reactivation. The analysis of
the drain system effectiveness suggests that drainage has not significantly influenced pore pressures on the considered slip
surfaces yet, mainly because of the very low permeability of the clay. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|