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In situ strength characterisation of peat and organic soil using full-flow penetrometers
Date Issued
2011-07
Date Available
2013-02-26T14:56:28Z
Abstract
Full-flow penetrometers have been shown to overcome problems experienced with the cone penetrometer when measuring resistance in very soft peat and organic soil, and give a much more uniform measure of resistance than the cone in fibrous peat. However, at present there is no guidance on the interpretation of strength parameters in these soils using the T-bar and ball. This paper examines the results of tests using these devices at two research sites in the Netherlands in conjunction with high-quality Sherbrooke sampling for laboratory testing. In fibrous peat, the T-bar and ball provided a more uniform measure of resistance with a lower degree of scatter than the cone. The in situ testing results have been compared with the laboratory tests to assess the range of resistance factors relating penetration resistance to the undrained shear strength (su) and have been shown to occupy a lower range of values than the cone penetrometer. However, penetration tests in these soils are likely to be influenced by partial drainage effects and this should be considered during testing and the subsequent interpretation of results. Recommendations are made for the use of full-flow penetrometers to obtain strength parameters in these soils.
Type of Material
Journal Article
Publisher
NRC Research Press
Journal
Canadian Geotechnical Journal
Volume
48
Issue
7
Start Page
1085
End Page
1099
Copyright (Published Version)
2011, NRC Research Press
Language
English
Status of Item
Peer reviewed
ISSN
0008-3674
1208-6010
This item is made available under a Creative Commons License
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