Geomechanics and Engineering

  • 제10권2호
  • /
  • Pages.225-245
  • /
  • 2016
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A novel modeling of settlement of foundations in permafrost regions

  • Wang, Songhe (Institute of Geotechnical Engineering, Xi'an University of Technology) ;
  • Qi, Jilin (College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture) ;
  • Yu, Fan (State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences) ;
  • Liu, Fengyin (Institute of Geotechnical Engineering, Xi'an University of Technology)
  • 투고 : 2015.04.29
  • 심사 : 2015.12.10
  • 발행 : 2016.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

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