The bearing capacity of ice covers under static loads

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Journal titleCanadian Journal of Civil Engineering
Pages288293; # of pages: 6
Subjectbearing capacity; ice; static loads; strain; deflection; glace (gel); charge statique; deformation; fleche (flexion)
AbstractThere is a growing interest in the use of ice covers to support loads for extended periods of time. Current practice for determining safe ice thickness for over-ice operations is essentially empirical, being based on experience and limited prototype testing. In this paper, the implications of a design criterion for the static load problem, which limits the maximum vertical deflection to the freeboard, are considered. An expression relating strain and deflection is developed. Field results for a static loading case were analyzed and indicated that the time dependent deflected shape of the ice cover could be represented using elastic theory and a time dependent Young' s modulus. By combining the strain-deflection relationship with the deflection limit criterion it is shown that strains are small (i.e. less than 10[-3] and in the primary stage of creep) for most cases of practical interest. A method, based on a correlation of observed deflection rates and associated initial elastic stresses from reported cases of static loading of ice covers, is proposed both as a design approach and a framework for analysis of field data.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number15253
NPARC number20374339
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Record identifierb7f20cda-8d19-45c5-8a34-e8e143adf4b4
Record created2012-07-23
Record modified2016-05-09
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