期刊
GEOTECHNIQUE
卷 67, 期 3, 页码 242-259出版社
ICE PUBLISHING
DOI: 10.1680/jgeot.15.P.236
关键词
anisotropy; clays; fabric/structure of soils; laboratory tests; stiffness; stress path
资金
- Engineering and Physical Science Research Council's (EPSRC's) [EP/E029957/1, EP/D506387/1]
- EPSRC [EP/E029957/1, EP/D506387/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/C528484/1, EP/D506387/1, EP/E029957/1] Funding Source: researchfish
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据