Monitoring and analysis of the bending behaviour of discrete piles used to stabilise a railway embankment
Monitoring and analysis of the bending behaviour of discrete piles used to stabilise a railway embankment
Discrete piles are used to stabilise infrastructure slopes, especially where there is insufficient additional land to allow construction of large toe berms or regrading of the slope. Compared with more conventional structures such as retaining walls, there are little field data on how discrete piles typically bend and displace under slope loading. This paper presents the results from monitoring a number of discrete piles used to stabilise a railway embankment at Hildenborough, Kent. Bending deflections deduced from strain gauges are compared with the displacements and rotations measured by inclinometer tubes cast into the piles. Four years after pile installation, the piles were bending downslope over their lower halves, with little bending measured in the upper sections. Regrading of the rockfill piling platform shortly after pile construction caused some of the pile loading, with further loading caused by the continued tendency for slope movement. Analysis of the piles using a simple elastic analysis gives bending moments and displacements close to those measured.
embankments, field instrumentation, ground movements, monitoring, piles, slopes
663-677
Smethurst, J.A.
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Powrie, W.
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
1 October 2007
Smethurst, J.A.
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Powrie, W.
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Smethurst, J.A. and Powrie, W.
(2007)
Monitoring and analysis of the bending behaviour of discrete piles used to stabilise a railway embankment.
Géotechnique, 57 (8), .
(doi:10.1680/geot.2007.57.8.663).
Abstract
Discrete piles are used to stabilise infrastructure slopes, especially where there is insufficient additional land to allow construction of large toe berms or regrading of the slope. Compared with more conventional structures such as retaining walls, there are little field data on how discrete piles typically bend and displace under slope loading. This paper presents the results from monitoring a number of discrete piles used to stabilise a railway embankment at Hildenborough, Kent. Bending deflections deduced from strain gauges are compared with the displacements and rotations measured by inclinometer tubes cast into the piles. Four years after pile installation, the piles were bending downslope over their lower halves, with little bending measured in the upper sections. Regrading of the rockfill piling platform shortly after pile construction caused some of the pile loading, with further loading caused by the continued tendency for slope movement. Analysis of the piles using a simple elastic analysis gives bending moments and displacements close to those measured.
Text
Smethurst & Powrie (2007) Hidenborough Geotechnique.pdf
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More information
Published date: 1 October 2007
Keywords:
embankments, field instrumentation, ground movements, monitoring, piles, slopes
Organisations:
Infrastructure Group, Civil Engineering & the Environment
Identifiers
Local EPrints ID: 52645
URI: http://eprints.soton.ac.uk/id/eprint/52645
ISSN: 0016-8505
PURE UUID: eff5107c-45a8-4afb-8c6e-7463bdda8509
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Date deposited: 11 Jul 2008
Last modified: 16 Mar 2024 02:47
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