TEMPERATURE ANALYSIS OF HIGH LATITUDES AND LOW ALTITUDE ISLAND PERMAFROST DURING THE CONSTRUCTION OF CFG PILE
DOI:
https://doi.org/10.14311/CEJ.2018.03.0024Keywords:
High latitudes and low altitude island permafrost, CFG pile composite foundation, Temperature monitoring, Finite element model, Height of subgradeAbstract
Cement fly ash gravel (CFG) pile composite foundation is an effective and economic
foundation treatment approach, which is significant to building a foundation, subgrade construction,
and so forth. The present paper aims to investigate the temperature behaviours of high latitudes
and low altitude island permafrost when the CFG pile was constructed, in which FEM and field
temperature monitoring of permafrost was utilized. The proposed findings demonstrate that the
temperature disturbance of permafrost is obvious when the CFG pile was constructed, and the
temperature variation of CFG pile and permafrost in FEM has a good agreement with the results of
field temperature monitoring. Additionally, the influence of different height subgrade on the
temperature field of CFG pile composite foundation was analyzed by FEM. The proposed findings
demonstrate that the height of subgrade affects the maximum temperature increase of permafrost
and the re-frozen time of permafrost after the construction of CFG pile composite foundation.
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