1,721,009 research outputs found
A simplified model for the evaluation of the degree of saturation in slope stability analysis of shallow soils
No full textIt is well known that the degree of saturation of a soil is time-varying in consequence of atmospheric conditions. Experimental data of matric suction at a site in Pilastro, Parma, Emilia Romagna Region, Northern Italy, have been used to compare against a simplified model, which is able to directly correlate the degree of saturation of a clayey-silt soil with rainfall events. The paper deals with the in-situ measurements of matric suction, the procedure to obtain the degree of saturation on the basis of assumed soil-water retention curves and comparison against the simplified model. This model, in turn, has been introduced in a simplified physically based stability method, recently set up by the authors to describe the most important factors influencing the rainfall-triggered mechanism of shallow landslides. © 2008 Taylor & Francis Group, London
Experimental Analyses on Cellular Polymers for Geotechnical Applications
No full textCellular polymers represent an important category within the area of the polymeric materials. Although these materials are experiencing a growing importance from both an industrial and an economic point of view, there is not such a big and detailed corresponding scientific literature. Except for the researches directly supported by the manufacturing companies, mainly interested, there are only few scientific and engineering studies about this argument. This article is aimed to the geotechnical characterisation of the rigid polyurethane foam and the extruded polystyrene foam and their physical-mechanical properties. The mechanical behaviour is investigated through oedometric and triaxial tests, performed in either PUR and XPS samples at different densities. As a result, the influence of the density on the relationship stress-strain for the materials is obtained. Practical methods and procedures about how to adapt the geotechnical tests on such materials, different from the soil, are also illustrated. At the end of the analyses, a first attempt of interpretation is given, so that an analytical model for the geotechnical description of cellular polymers can be developed. (C) 2016 Published by Elsevier Ltd
La Rocca Sanvitale di Fontanellato: analisi dell'influenza del modello di sottosuolo sulle condizioni tensionali e deformative.
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