›› 2009, Vol. 30 ›› Issue (S1): 24-28.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

In-situ test and numerical simulation of the umbrella-shaped uplift anchor

XU Min, SONG Lin-hui, ZHOU Feng, MEI Guo-xiong, ZAI Jin-min   

  1. College of Civil Engineering, Nanjing University of Technology, Nanjing 210009, China
  • Received:2009-03-20 Online:2009-08-10 Published:2011-03-16

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Abstract:

The umbrella-shaped uplift anchor is an innovative anchor device. Based on the in-situ test, the uplift resistance behavior of the umbrella-shaped uplift anchor has been carried out. Compared with uplift piles at the same site, the capacity of the umbrella-shaped uplift anchors can be obviously improved, while the Q-S curve is under the normal state condition. Because the test conditions are not adequate enough to obtain the ultimate bearing capacity of the umbrella-shaped uplift anchor, the in-situ test of the umbrella-shaped uplift anchor and uplift piles have been numerically simulated with the ABAQUS finite element software, so that the Q-S curve of the umbrella-shaped uplift anchor at the limit state can be obtained. The simulation is divided into two stages. The first stage is adjusting the parameters to make it consistent with the test Q-S curve under the normal state condition. And the second stage is increasing the load to get the Q-S curve of the umbrella-shaped uplift anchor at the limit state. The result shows that the umbrella-shaped uplift anchor can fully mobilize its expanding soil participating in uplift. The Q-S curve further indicates that the uplift resistance behavior of the umbrella-shaped anchor has great potentiality and prominent superiority.

Key words: umbrella-shaped uplift anchor, bearing behavior, uplift pile, numerical simulation

CLC Number: 

  • TU473
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