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Effective Friction Angle Of Deltaic Soils In The Vistula Marshlands

Abstract

This article presents the results of laboratory tests on soft, normally consolidated soils from the Vistula Marshlands. Samples of high-plasticity organic soils (muds) taken from 3.2–4.0 m and 9.5–10.0 m depth, as well as peat deposit at 14.0 m, are analysed. Presented case study confirms the applicability of the Norwegian Institute of Technology (NTH) method based on Cone Penetration Tests (CPTU) and allows for a conservative estimation of effective friction angle for muds. The plastification angle equal to 14.5° for organic silt, applied in the modified NTH method, fits well the triaxial test (TX) results. Moreover, the dilative-contractive behaviour according to the CPTU soil classification based on the Robertson’s proposal from 2016 corresponds well with volumetric changes observed in the consolidated drained triaxial compression tests. The internal friction angles of the Vistula Marshlands’ muds and peats are lower in comparison with the database of similar soft soils.

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Accepted or Published Version
DOI:
Digital Object Identifier (open in new tab) 10.2478/sgem-2019-0016
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Creative Commons: CC-BY-NC-ND open in new tab

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
Studia Geotechnica et Mechanica no. 41, pages 143 - 150,
ISSN: 0137-6365
Language:
English
Publication year:
2019
Bibliographic description:
Międlarz K., Konkol J., Bałachowski L.: Effective Friction Angle Of Deltaic Soils In The Vistula Marshlands// Studia Geotechnica et Mechanica -Vol. 41,iss. 3 (2019), s.143-150
DOI:
Digital Object Identifier (open in new tab) 10.2478/sgem-2019-0016
Sources of funding:
Verified by:
Gdańsk University of Technology

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