Field tests of deep power-installed screw anchors in permafrost

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TypeArticle
Journal titleCanadian Geotechnical Journal
ISSN0008-3674
Volume11
Issue3
Pages348358; # of pages: 11
SubjectPermafrost; Soils; anchors; screw piles; loads; creep; field tests; Sol; ancrage (organe); pieu visse; charge ( mecanique); fluage; essai en place
AbstractA test program was conducted in northern Manitoba to evaluate the creep behavior and load capacity of 8-, 10-, and 15-in. (20.3-, 25.4-, and 38.1-cm) diameter power- installed screw anchors embedded in permafrost (frozen, stratified silts and clays containing ice at about 31.5 degrees F (-0.3 degrees C)). The test results show that the anchors behavedunder uplift loads, in a manner that was essentially very similar to that exhibited by deep footings of the same size. No failure planes (slip surfaces) were observed around the plates but a deformed zone above the plates was clearly visible in the varved soil when the anchors were excavated after testing. A method of analysis which allows the test data to be used directly for design, based on secondary creep rates and allowable displacements, is described.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-RP-608
NRC number14012
2731
NPARC number20374867
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Record identifier2d08ead2-7fca-4b54-aa60-d14e7c723559
Record created2012-07-23
Record modified2016-05-09
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