›› 2009, Vol. 30 ›› Issue (2): 333-337.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on mechanism of uplift rock-socketed piles

HE Si-ming 1, 2, WU Yong 1, 2, LI Xin-po 1, 2   

  1. 1. Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu 610041, China; 2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
  • Received:2007-05-30 Online:2009-02-10 Published:2011-01-27

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Abstract:

The uplift rock-socketed piles have been widely used in modern civil engineering constructions. However, some mechanism of it such as the load transmission characteristic, the side resistance distribution and its influencing factors has not been studied clearly. The shear lag model is used to analyze the side resistance distribution law and the load-displacement characters of uplift rock-socketed piles. Based on theoretical analyses and checking calculation, it is shown that when the load is lower than the elastic limit, the distribution follows the exponential law; and the load-displacement curve assumes linear changes. On the contrary, when the load exceeds the elastic limit the side resistance distribution will be divided into two parts as decoupling section and coupling section respectively. The side resistance is even in the decoupling section, while it follows exponential law in coupling section. Meanwhile, the load-displacement presents a nonlinearity.

Key words: uplift pile, shear lag theory, load-displacement characters

CLC Number: 

  • TU 472
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