UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

The shear stiffness characteristics of four Eocene-to-Jurassic UK stiff clays

Brosse, A; Hosseini Kamal, R; Jardine, RJ; Coop, MR; (2017) The shear stiffness characteristics of four Eocene-to-Jurassic UK stiff clays. Géotechnique , 67 (3) pp. 242-259. 10.1680/jgeot.15.P.236. Green open access

[img]
Preview
Text
Coop_jgeot.15.p.236.pdf - Published version

Download (1MB) | Preview

Abstract

A large proportion of the southern UK is underlain by stiff clays. Improving their geotechnical characterisation is important for many current and future infrastructure projects. This paper presents an integrated study of the complex stiffness behaviour of four key medium-plasticity, highly overconsolidated strata: the Gault, Kimmeridge, Oxford and London clays. The latter were deposited between the Jurassic and the Eocene under broadly similar marine conditions. Coordinated programmes of advanced static and dynamic laboratory measurements have been undertaken on high-quality samples, concentrating on samples taken from similar depths at inland sites and including triaxial and hollow cylinder stress path experiments employing high-resolution local strain, multi-axial bender element and resonant column techniques. A new approach was employed to interpret the hollow cylinder experiments and the laboratory measurements are examined in combination with independent field shear wave data. The clays' stiffness characteristics are shown to be markedly anisotropic, pressure dependent and highly non-linear. Synthesis allows key conclusions to be drawn regarding: the relative reliability of alternative measurement approaches; the potential spread of stiffness behaviours between the clays; and whether the clays' varying geological ages and burial depths have any systematic influence on their stiffness characteristics. The results have important geotechnical engineering implications.

Type: Article
Title: The shear stiffness characteristics of four Eocene-to-Jurassic UK stiff clays
Open access status: An open access version is available from UCL Discovery
DOI: 10.1680/jgeot.15.P.236
Publisher version: http://dx.doi.org/10.1680/jgeot.15.P.236
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Anisotropy; clays; fabric/structure of soils; laboratory tests; stiffness; stress path
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1522101
Downloads since deposit
281Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item