›› 2009, Vol. 30 ›› Issue (S2): 1-8.

• Fundamental Theroy and Experimental Research •     Next Articles

Analysis of settlements of constructions in permafrost regions

QI Ji-lin, ZHANG Jian-ming, YAO Xiao-liang, HU Wei, FANG Li-li   

  1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2009-08-17 Online:2009-08-10 Published:2011-06-21

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Abstract:

Settlement of a construction in permafrost regions results from several simultaneous processes, each with a different mechanism. The first is thaw settlement due to the degradation of the permafrost underneath. The second is creep, including creep of warm frozen layers and creep of unfrozen soil in the active layer in warm seasons. Third, because freeze-thaw cycling in the active layer can change soil properties; extra settlement would also take place in the first years. These three processes are interactive, which makes any single attempt of calculation very difficult. Based on field investigations and practice of construction and maintenance of Qinghai-Tibet railway and highway, these three processes were analyzed previously.

Key words: permafrost, thaw settlement, freeze-thaw, creep

CLC Number: 

  • TU 443
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