Engineering characterisation of Norwegian glaciomarine silt

Files in This Item:
File Description SizeFormat 
OsSiltFinal.pdf508.65 kBAdobe PDFDownload
Title: Engineering characterisation of Norwegian glaciomarine silt
Authors: Long, Michael (Michael M.)
Gudjonsson, Gisli
Donohue, Shane
Hagberg, Knut
Permanent link: http://hdl.handle.net/10197/3099
Date: 9-Feb-2010
Abstract: Guidance is provided for geotechnical engineers designing civil engineering works in silty soils based on a detailed characterisation of a glaciomarine silt from Os in western Norway. It was found that these soils are susceptible to disturbance by good quality fixed piston tube sampling and care needs to be taken when using laboratory derived design parameters, particularly for consolidation and shear strength properties. A technique for assessing sample disturbance using shear wave velocity and suction measurements proved promising. Conventional techniques for determining soil strength from triaxial tests in silt are inappropriate due to the dilational nature of the material and more reliable and logical strength estimates can be made from a limiting strain criterion. Field vane data should be used with caution as measured strength, particularly remoulded values, may be high and it seems more reliable parameters can be derived from CPTU tests. One dimensional consolidation and creep of these silts can be modelled successfully by the well-known Janbu formulation. The behaviour of the Os silts does not fit easily into classical soil mechanics and published frameworks for soft soils. It seems the material is of “transitional” type and this work adds to the database of such soils which includes other natural silts and gap graded soils. For future work it is recommended that larger sample tubes (say 75 mm) with a very sharp cutting edge should be used in parallel with in situ CPTU testing.
Funding Details: Not applicable
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2009 Elsevier B.V.
Keywords: Silt;Compressibility;Shear strength;Sampling;CPTU tests
Subject LCSH: Silt--Norway
Soil consolidation test
Shear strength of soils
Soils--Testing
DOI: 10.1016/j.enggeo.2009.11.002
Language: en
Status of Item: Peer reviewed
Appears in Collections:Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

Show full item record

SCOPUSTM   
Citations 50

5
Last Week
0
Last month
checked on Jun 22, 2018

Page view(s) 20

144
checked on May 25, 2018

Download(s) 5

1,273
checked on May 25, 2018

Google ScholarTM

Check

Altmetric


This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.