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A novel modeling of settlement of foundations in permafrost regions
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  • Journal title : Geomechanics and Engineering
  • Volume 10, Issue 2,  2016, pp.225-245
  • Publisher : Techno-Press
  • DOI : 10.12989/gae.2016.10.2.225
 Title & Authors
A novel modeling of settlement of foundations in permafrost regions
Wang, Songhe; Qi, Jilin; Yu, Fan; Liu, Fengyin;
Settlement of foundations in permafrost regions primarily results from three physical and mechanical processes such as thaw consolidation of permafrost layer, creep of warm frozen soils and the additional deformation of seasonal active layer induced by freeze-thaw cycling. This paper firstly establishes theoretical models for the three sources of settlement including a statistical damage model for soils which experience cyclic freeze-thaw, a large strain thaw consolidation theory incorporating a modified Richards` equation and a Drucker-Prager yield criterion, as well as a simple rheological element based creep model for frozen soils. A novel numerical method was proposed for live computation of thaw consolidation, creep and freeze-thaw cycling in corresponding domains which vary with heat budget in frozen ground. It was then numerically implemented in the FISH language on the FLAC platform and verified by freeze-thaw tests on sandy clay. Results indicate that the calculated results agree well with the measured data. Finally a model test carried out on a half embankment in laboratory was modeled.
settlement;frozen ground;freeze-thaw;thaw consolidation;creep;
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Strength behaviors and meso-structural characters of loess after freeze-thaw, Cold Regions Science and Technology, 2018, 148, 104  crossref(new windwow)
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