Table of Contents
ISRN Civil Engineering
Volume 2011 (2011), Article ID 378579, 11 pages
http://dx.doi.org/10.5402/2011/378579
Research Article

Site Monitoring and Numerical Modelling of a Trial Embankment's Behaviour on Venice Lagoon Soils

1Geotechnics and Structure Department, NET Engineering S.p.A., 35043 Monselice, Italy
2Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
3IMAGE Department, University of Padova, 35129 Padova, Italy
4Wesi Geotecnica Srl, 54100 Massa, Italy

Received 24 May 2011; Accepted 21 June 2011

Academic Editors: Y. Lai and M. T. Tumay

Copyright © 2011 Valentina Berengo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Mineralogical and mechanical characterization of Venice lagoon soils is required for design and construction of movable floodgates that aim to safeguard the city of Venice against recurrent floods. An instrumented circular test embankment was constructed in the lagoon area, enabling accurate measurement of relevant ground displacements. In situ stress-strain-time measurements were carried out in order to investigate the viscous behaviour of Venice lagoon soils during and after embankment loading. Site monitoring was kept up also during embankment removal so that information on soil behaviour in unloading is available, too. This paper illustrates key results from embankment monitoring and also focuses on modelling of creep behaviour. A recently developed anisotropic constitutive model was calibrated for Venice lagoon soils and is used in back analysis of the embankment construction and removal process. The constitutive parameters of the model were calibrated from in situ and laboratory tests.