Mechanical behavior of silty soils of the Venice lagoon as a function of their grading characteristics
- 1 August 2002
- journal article
- Published by Canadian Science Publishing in Canadian Geotechnical Journal
- Vol. 39 (4), 879-893
- https://doi.org/10.1139/t02-037
Abstract
The main feature of the shallowest quaternary basin of the well-renowned historic city of Venice, Italy and its surrounding lagoon, is the presence, apparently without any regular trend in depth and site, of a predominant silt fraction. This is always combined with clay and (or) sand, forming a chaotic and erratic interbedding of different sediments whose mineralogy is however variable in a relatively narrow range due to a unique geological origin and a common depositional environment. After a brief description of the basic soil indexes of the Venice lagoon soil, the present study, based on a comprehensive geotechnical laboratory investigation, describes the range of variation of the most relevant time-independent geotechnical properties. Moreover, a new grain size index, combining the geometrical characteristics of the particle distribution, is introduced. It is shown that the soil response at large and very small strains can be related to this grain size index, which appears to be able to include the influence of the soil grading on the description of the overall mechanical behavior.Key words: silt, mechanical behavior, Venice soil, grain-size index, laboratory investigation, critical state parameters.Keywords
This publication has 21 references indexed in Scilit:
- Implications for critical state theory from isotropic compression of sandGéotechnique, 2000
- Nor-Sand: a simle critical state model for sandGéotechnique, 1993
- The critical state of sandsGéotechnique, 1991
- Work as a criterion for determining in situ and yield stresses in claysCanadian Geotechnical Journal, 1987
- Discussion: The strength and dilatancy of sandsGéotechnique, 1987
- Lessons From Oedometer Tests on High Quality SamplesJournal of Geotechnical Engineering, 1986
- The strength and dilatancy of sandsGéotechnique, 1986
- A state parameter for sandsGéotechnique, 1985
- Undrained Deformation and Liquefaction of Sand Under Cyclic StressesSoils and Foundations, 1975
- Shear Modulus and Damping in Soils: Design Equations and CurvesJournal of the Soil Mechanics and Foundations Division, 1972