›› 2012, Vol. 33 ›› Issue (2): 343-348.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Uplift behaviors of bored piles subjected to high critical cyclic loading level

ZHANG Zhong-miao1, XIE Zhi-zhuan1, ZHAO Yu-bo1, LI Hui-ming2   

  1. 1. MOE Key Laboratory of Soft Soils and Geoenvironmrnt Engineering, Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; 2. Earthquake Engineering Research Center, Guangzhou University, Guangzhou 510405, China
  • Received:2010-05-19 Online:2012-02-10 Published:2012-02-14

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Abstract: In order to study the behaviors of uplift pile subject to cyclic load, cyclic loading tests are carried out on two uplift piles at Xiaoshan, Hangzhou. Stress gauges and steel pipes are pre-buried in the test pile to measure the changes of pile shaft stress and the pull-out amount of both pile tip and pile head. Through the analysis of the pile shaft stress and the pull-out amount, the influence of cyclic load on bearing capacity and pull-out amount are studied. Comprehensive analysis of the pull-out amount, pile shaft force and pile side friction, it is drawn a conclusion that the uplift pile damaged after two or three cycles when uplift pile subjects to cyclic load, and the critical cyclic load level is close to 1.

Key words: uplift pile, cyclic loading, pile side friction, pile shaft stress

CLC Number: 

  • TU 473
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