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

Influence of structure on the behavior of a saturated clayey loess

Xu, L; Coop, MR; (2016) Influence of structure on the behavior of a saturated clayey loess. Canadian Geotechnical Journal , 53 (6) pp. 1026-1037. 10.1139/cgj-2015-0200. Green open access

[img]
Preview
Text
Coop_Clayeyloess_text%2Btables%2Bfigures_revised.pdf

Download (3MB) | Preview

Abstract

An intensive experimental investigation by means of triaxial and oedometer tests was performed on a clayey loess that was retrieved from two depths at a location on the southern Chinese Loess Plateau. Intact and reconstituted samples were used to identify the effects of the natural structure on soil behavior in saturated conditions. The behavior in compression was clearly affected by structure with the intact samples reaching well-defined gross yield points outside the intrinsic compression line of the reconstituted soil, after which the compression paths converged towards the intrinsic compression lines, behavior which is consistent with destructuration. However, very high stresses were required to give complete convergence. Similarly the triaxial tests that were carried out at lower stress levels also did not give convergence of the critical states so that different critical state lines could be defined for the intact and reconstituted soils. This was consistent with qualitative observations from scanning electron micrographs that natural elements of fabric and possibly bonding persisted even after triaxial shearing. The effects of structure at the two depths on the compression and shearing behavior were slightly larger for the shallower samples. Despite the very different genesis of the soils, it was found that similar frameworks could be applied to those used for sedimentary clays and that the degree of structure was equivalent to a clay of medium sensitivity.

Type: Article
Title: Influence of structure on the behavior of a saturated clayey loess
Open access status: An open access version is available from UCL Discovery
DOI: 10.1139/cgj-2015-0200
Publisher version: http://dx.doi.org/10.1139/cgj-2015-0200
Language: English
Keywords: Science & Technology, Technology, Physical Sciences, Engineering, Geological, Geosciences, Multidisciplinary, Engineering, Geology, compressibility, shear strength, fabric, structure of soils, laboratory tests, transitional behavior, triaxial tests, natural loess, compression, China, soils, mechanics, deposits, Lanzhou
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/1513567
Downloads since deposit
180Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item