Shaft Capacity of Open-Ended Piles in Clay

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Title: Shaft Capacity of Open-Ended Piles in Clay
Authors: Doherty, Paul
Gavin, Kenneth
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Date: Nov-2011
Online since: 2013-02-20T12:32:15Z
Abstract: This paper describes an experimental investigation designed to assess the impact of pile end condition on the capacity of piles installed in soft clay. A series of field tests are described in which instrumented open-ended and closed-ended model piles were jacked into soft clay. The radial stresses, pore pressures, and load distribution were recorded throughout installation, equalization, and load-testing. Although the total stress and pore pressure developed during installation were related to the degree of soil plugging, the radial effective stress that controls the shaft resistance was shown to be independent of the mode of penetration. The long-term shaft capacity of the open-ended pile was closely comparable to that developed by closed-ended piles, suggesting a limited influence of end condition on the fully equalized shaft resistance. In contrast to the shaft resistance, the base capacity was highly dependent on the degree of plugging.
Type of material: Journal Article
Publisher: ASCE
Journal: Journal of Geotechnical and Geoenvironmental Engineering
Volume: 137
Issue: 11
Start page: 1090
End page: 1102
Copyright (published version): 2011, American Society of Civil Engineers
Keywords: FoundationsPilesOpen-ended penetrationRadial stressesInstrumentation
DOI: 10.1061/(ASCE)GT.1943-5606.0000528
Language: en
Status of Item: Peer reviewed
Appears in Collections:Civil Engineering Research Collection

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