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Behaviour of a trial embankment on hydraulically placed pfa

Cousens, T.W. and Stewart, D.I. (2003) Behaviour of a trial embankment on hydraulically placed pfa. Engineering Geology, 70 (3-4). pp. 293-303. ISSN 0013-7952

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Abstract

The paper describes the performance of a 5.3-m trial embankment constructed on approximately 45 m of hydraulically placed pulverised fuel ash (pfa). It is planned to redevelop the 17-ha lagoon containing the pfa as a landfill. There is little variation in the particle size distribution of the uniformly graded silt sized pfa over the lagoon. However, the density of the pfa varies with depth with loose material underlying a denser surface layer, in a pattern that probably results from the water level in the lagoon during pfa deposition.

Settlement under the trial embankment was apparently largely complete by the end of the construction period (17 days), with approximately 300 mm of settlement under the crest of the embankment. The embankment settlement is significantly affected by compression of the loose layers within the deposit. Analysis of the problem using the conventional one-dimensional settlement method, and an mv profile determined by CPT calibrated against laboratory tests gave a reasonable prediction of the embankment crest settlement.

Item Type: Article
Copyright, Publisher and Additional Information: © 2003 Elsevier B.V. All rights reserved. This is an author produced version of a paper published in Engineering Geology.
Keywords: Case history; Embankments; Field instrumentation; Full-scale tests; Industrial wastes; Monitoring; Settlements; Silts
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds)
The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds) > Inst for Pathogen Control Engineering (Leeds)
Depositing User: Douglas I Stewart
Date Deposited: 21 Jun 2006
Last Modified: 21 Jul 2014 06:34
Published Version: http://dx.doi.org/10.1016/S0013-7952(03)00097-8
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/S0013-7952(03)00097-8
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/1330

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