›› 2010, Vol. 31 ›› Issue (2): 441-448.

• Geotechnical Engineering • Previous Articles     Next Articles

Calculation of ultimate bearing capacity of screw pile group by inclined pull-out test

ZHANG Ya-jun1, DONG Tian-wen2, HUANG Lian-zhuang3, LIANG Li1   

  1. 1. School of Resource and Civil Engineering, Northeastern University, Shenyang 110004, China; 2. Department of Road and Bridge Engineering, Liaoning Provincial College of Communications, Shenyang 110122, China; 3. Liaoning Electric Power Survey and Design Institute, Shenyang 110016, China
  • Received:2008-08-06 Online:2010-02-10 Published:2010-03-24

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Abstract:

The screw pile body and pitch of screw is chosen as the subject investigated of the pull-out screw pile foundation under inclined load; and the subgrade reaction by the pile-soil interactivity were put on surfaces of pile body and pitch of screw by the formal load; at the same time, the moving coordinates were introduced in the analysis. So the used problem of superposition theorem for large deformation material system, for instance soil-pile, could be transferred the small deformation & elastic mass for screw pile body and pitch of screw. The failure model of pull-out screw pile under inclined load was analyzed; and the calculation of ultimate load for a pile and pile group were given; and calculations of ultimate inclined load of screw pile group was 93.3% to the average determined value from field pull-out tests under inclined load. It is shown that the research technique, the failure model and the calculation formulas are consistent with the practical characteristics of the pull-out screw pile group under inclined load on the whole; and these research results can guide the designing and analysis of pull-out screw pile foundation under inclined load.

Key words: pile foundation, screw pile, inclined load, failure model, ultimate bearing capacity

CLC Number: 

  • TU 473
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