Volumetric behaviour of saturated sands under poor drainage conditions

Lourenco, Sergio, Wang, Gonghui, Sassa, Kyoji and Fukuoka, Hiroshi 2006. Volumetric behaviour of saturated sands under poor drainage conditions. Journal of Geophysical Research - Earth Surface 111 (F3) , F03004. 10.1029/2005JF000324

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Abstract

Permeability variations have been identified as a key factor in controlling slope failure locations in rainfall-induced landslides. In this research, failure behavior in limited drainage conditions was investigated. Tests were performed on saturated sands by means of a modified triaxial system that could mimic the effect of low-permeability barriers present in the field. The tests were conducted by increasing the pore water pressure at different rates to study the effects of the speed of pore water pressure rise on soil failure. The results revealed a dependence of soil volume changes on the rate of pore water pressure increase. In general, the results showed that volume change of granular soils, which are under shear and confined laterally by low-permeability materials, depends on the initial porosity and the pore water pressure rate. These results are particularly valid during the early stages of soil deformation that precede wholesale slope failure.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Subjects:	Q Science > QE Geology
Uncontrolled Keywords:	Landslides; sands; triaxial tests
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/2169-9011/ (accessed 28/08/2014)
Publisher:	AGU
ISSN:	0148-0227
Date of First Compliant Deposit:	30 March 2016
Last Modified:	23 May 2023 22:53
URI:	https://orca.cardiff.ac.uk/id/eprint/19419

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