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Utilizzo della prova al blu di metilene nella determinazione di alcuni parametri geotecnici di terreni argillosi
No full textRelationship between the residual shear strength and the methylene blue value in weathered clay soils
No full textA new correlation is proposed between the residual shear strength and the methylene blue value (‘value of blue’; VB) for
weathered clay soils on argillaceous bedrock and on alluvial soils in the Oltrepo Pavese area (Northern Italy), which can be
considered as geologically representative of a large part of the Italian Apennines. Shallow landslides occur periodically in these
soils as a result of high-intensity rainfall events. A number of soils were tested. Trench pits were used for sampling and for the soil
profile description (lithology, structure, grade of weathering, thickness). Field surveys were integrated with some standard
geotechnical laboratory tests. The methylene blue dye adsorption (VB) was determined in accordance with the French AFNOR
standards. The residual strength friction angle was measured with direct shear tests; the procedure employed for the measure
involved inserting the soil at the liquid limit in the direct shear ring, applying consolidation in stages and then shearing (Kanji
method). The applicability of some existing correlations between the residual friction angle and index properties were tested.
The correlations are characterized by a large amount of scatter in the data and tend to overestimate the residual friction angle.
The VB test is easy and rapid to perform and appears to be a good indicator of the residual strength friction angle for the tested soils
Relationship between the residual shear strength and the methylene blue value in weathered clay soils
No full textEngineering geological units for the assessment of shallow landslide susceptibility in weathered clayey soils.
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Thematic maps to investigate the causes of building damage: the case study of Oltrepo Pavese (Northern Italy).
No full textEffetti del fenomeno di ritiro-rigonfiamento del terreno su fabbricati con fondazioni superficiali: esempi nell'Oltrepo Pavese
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Studio del fenomeno di ritiro-rigonfiamento dei terreni argillosi a supporto degli strumenti urbanistici
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