Uplift performance of transmission tower foundations embedded in clay
Uplift performance of transmission tower foundations embedded in clay
The contribution to the uplift stiffness and capacity provided by the clay beneath the base of shallow footings typical in configuration to those employed to support high voltage electricity transmission towers is examined. Pore pressures developed at the base of appropriately scaled footings founded on clay were measured over a wide range of uplift rates in a geotechnical centrifuge. These measurements, coupled with data from tests on identical footings founded on sand, are used to provide insights into the influence of uplift rate on the failure mechanism and footing capacity. Data from a series of undrained triaxial extension tests, conducted over a range of strain rates, are presented and these data combined with finite element back-analyses of the centrifuge uplift tests are used to provide designers with a means of assessing the capacity and load–displacement response of footings on clay subjected to high rates of uplift in service.
shallow foundations, suction, centrifuge model, clays, electric transmission structures, towers
531-540
Rattley, M.J.
f9bd9c87-c5e2-4b9f-b914-131c13df1d97
Richards, D.J.
a58ea81e-443d-4dab-8d97-55d76a43d57e
Lehane, B.M.
f85e29c3-2fd0-47f4-8f3a-b462966b5575
April 2008
Rattley, M.J.
f9bd9c87-c5e2-4b9f-b914-131c13df1d97
Richards, D.J.
a58ea81e-443d-4dab-8d97-55d76a43d57e
Lehane, B.M.
f85e29c3-2fd0-47f4-8f3a-b462966b5575
Rattley, M.J., Richards, D.J. and Lehane, B.M.
(2008)
Uplift performance of transmission tower foundations embedded in clay.
Journal of Geotechnical and Geoenvironmental Engineering, 134 (4), .
(doi:10.1061/(ASCE)1090-0241(2008)134:4(531)).
Abstract
The contribution to the uplift stiffness and capacity provided by the clay beneath the base of shallow footings typical in configuration to those employed to support high voltage electricity transmission towers is examined. Pore pressures developed at the base of appropriately scaled footings founded on clay were measured over a wide range of uplift rates in a geotechnical centrifuge. These measurements, coupled with data from tests on identical footings founded on sand, are used to provide insights into the influence of uplift rate on the failure mechanism and footing capacity. Data from a series of undrained triaxial extension tests, conducted over a range of strain rates, are presented and these data combined with finite element back-analyses of the centrifuge uplift tests are used to provide designers with a means of assessing the capacity and load–displacement response of footings on clay subjected to high rates of uplift in service.
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Published date: April 2008
Keywords:
shallow foundations, suction, centrifuge model, clays, electric transmission structures, towers
Organisations:
Civil Engineering & the Environment
Identifiers
Local EPrints ID: 53358
URI: http://eprints.soton.ac.uk/id/eprint/53358
ISSN: 1090-0241
PURE UUID: a842e792-3448-4e39-90f6-35c798486a08
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Date deposited: 22 Jul 2008
Last modified: 15 Mar 2024 10:41
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Contributors
Author:
M.J. Rattley
Author:
B.M. Lehane
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