Abstract
The Klett research site was developed in conjunction with the new E6 developments south of Trondheim, Norway. The site comprises non-sensitive clay to about 6 m to 8 m and quick clay with significant silt lenses below this down to at least 30 m. The materials encountered are typical of the marine clays found in Scandinavia and North America. Classical geophysical and geotechnical techniques such as total soundings, rotary pressure soundings and ERT proved very useful in characterising the quick clay. The material is particularly susceptible to sample disturbance effects and the work showed that it is important to test any samples as soon as possible after sampling. CPTU data proved particularly useful for the determination of some soil properties as well as general soil classification. Several full-scale experiments have been performed at the site. Pile capacity tests showed that significant ageing effects occurred. Lime-cement column tests, as well as laboratory trials, allowed considerable savings to be made in the amount of binder required for foundations and slope improvement. A full-scale embankment test provided very useful data for the calibration of soil constitutive models.
Highlights
Deposits of marine clay which have been leached of their salt content, and have high sensitivity, are found over large areas of Norway, Sweden and Canada
The near initial verticality of the initial part of the stress path plots confirm that the samples have retained much of their structure
Karlsrud et al [63] derived a series of bearing capacity factors for Norwegian clays by comparing research standard CPTU tests with consolidated undrained compression tests (CAUC) triaxial tests on Sherbrooke block samples
Summary
Deposits of marine clay which have been leached of their salt content, and have high sensitivity, are found over large areas of Norway, Sweden and Canada. These deposits pose many difficulties for engineers working in such areas. The objective of this paper is to address this issue by presenting a detailed characterisation of the soils at Klett based on the results of routine and advanced laboratory and in situ testing in addition to three full-scale field tests. Several previous papers have detailed the characterisation of quick clays in the Trondheim area for example on the Buvika site [1], the Dragvoll/NTNU campus site [2], Tiller [3], Esp landslide site [4], the Dragvoll salt well test area [5] and the Tiller/Flotten NTGS research site [6]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
