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Creep of model piles in frozen soil

 

作者: V. R. Parameswaran,  

 

期刊: Canadian Geotechnical Journal  (NRC Available online 1979)
卷期: Volume 16, issue 1  

页码: 69-77

 

ISSN:0008-3674

 

年代: 1979

 

DOI:10.1139/t79-007

 

出版商: NRC Research Press

 

数据来源: NRC

 

摘要:

Preliminary results of laboratory studies on the behaviour of model piles of wood, concrete, and steel, having different surface finishes, embedded in artificially frozen sand and subject to constant loads, are reported in this paper. The displacement rate, was found to vary with the applied stressf, according to a steady state creep equation of the type, as found for other viscoelastic materials such as metals at high temperature. The value of the exponentnvaried between 6.7 and 9.1 for various types of piles.The results agreed favourably with field data obtained from pile pull-out tests carried out at Gillam and Thompson, Manitoba. The value ofnfrom Gillam and Thompson tests, 8.05 and 7.5, respectively, were within the range of the present experimental values. Comparison with pile pull-out tests carried out in ice, and theoretical predictions for ice showed that the value of the exponentnwas much larger for frozen soil than for ice. The bearing capacity at a particular displacement rate was also found to be almost an order of magnitude larger in frozen soil than in ice.

 

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