Numerical Simulation Study on Vertical Bearing Characteristics of Static Drilling Grounding Pile in Frozen Soil Area
Based on the structural characteristics of static drilling grounding pile,the three-dimen-sional finite element model was established by ABAQUS to conduct numerical simulation research on the pile bearing characteristics of static drilling grounding pile in frozen soil area.The load transfer mecha-nism of pile foundation under the vertical load was analyzed,and the influence of frozen soil tempera-ture,cement soil thickness and cement soil cohesion on the vertical bearing characteristics were dis-cussed.The results show that the cement shell is the key to the bearing capacity of pile foundation,and the vertical stress change is complicated;The vertical stress at the bottom of the cement soil expansion head increases about 43%over the top;The stress at the lower surface increases by 27.5%over the up-per part.There are certain differences in the bearing characteristics of pile foundations under normal and negative temperature conditions of frozen soil around piles;The thickness of cement soil around pile should be between 100 mm to 0.5 times the pile diameter of precast core pile;The cohesive force of about 300 MPa is most favorable to the bearing capacity of pile foundation.
frozen soil areastatic drill rooted pilepile bearing characteristicspile permafrost tem-peraturethickness of cement soil around the pilecement soil cohesive force
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