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Applicability of piezocone and dilatometer to characterize the soils of the Venice Lagoon

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Abstract

The effectiveness of two geotechnical investigation tools—the piezocone and the dilatometer—to characterize the soils forming the shallowest deposits of the upper quaternary basin of the Venice lagoon soil is examined in this study. For this purpose, the results of a comprehensive site and laboratory investigation carried out recently over a small lagoon area—the Malamocco Test Site—are used to evaluate the applicability of the most widely used charts or correlative equations to characterize soil profile and estimate the main geotechnical properties of these soils, when applied to the interpretation of CPTU and DMT results. The particular interest of this site—apart from its unquestionable historical relevance—is the presence, apparently without any regular pattern in depth and site, of a predominantly silty fraction combined with clay and/or sand, thus forming an erratic interbedding of various types of sediments. This case represents therefore the opposite condition of that which has been normally utilized in the past to calibrate the two devices, namely the presence of particularly homogeneous natural deposits or artificially sedimented homogeneous layers of sand or clay. The Malamocco Test Site may therefore be considered as test benchmark for the applicability of the two devices to characterize highly heterogeneous silty deposits.

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Authors and Affiliations

  1. Dipartimento di Ingegneria Idraulica, Marittima e Geotecnica, Università di Padova, Via Ognissanti, 39, 35129, Padova, Italy

    Giuseppe Ricceri, Paolo Simonini & Simonetta Cola

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  1. Giuseppe Ricceri
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  2. Paolo Simonini
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  3. Simonetta Cola
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Ricceri, G., Simonini, P. & Cola, S. Applicability of piezocone and dilatometer to characterize the soils of the Venice Lagoon. Geotechnical and Geological Engineering 20, 89–121 (2002). https://doi.org/10.1023/A:1015043911091

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