JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2016, Vol. 46 ›› Issue (5): 88-94.doi: 10.6040/j.issn.1672-3961.0.2016.153

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Influence of squeezed branch pile bearing capacity on different numbers and positions of enlarged parts

LI Lianxiang1,2, LI Xianjun1,2   

  1. 1. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. Engineering Research Center of Foundation Pit and Deep Foundation, Shandong University, Jinan 250061, Shandong, China
  • Received:2016-05-10 Online:2016-10-20 Published:2016-05-10

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Abstract: The squeezed branch pile behavior and its internal working mechanism had been deeply investigated by simulating the field test and designing34 comparison models. According to vertical comparison on piles with the same number of enlarged parts, conclusions had been made that skin friction played a main role in the former stage but enlarged part resistance played later. A deeper enlarged part position could lead to a higher later-stage bearing capacity and a slower settlement curve. While lateral comparison on piles with different enlarged part number showed bearing capacity improving efficiency rule and enlarged part resistance efficiency rule: too many enlarged parts could reduce the bearing capacity improving efficiency and affect the performance of the enlarged parts. To achieve the best in economy, the suggested optimal number of enlarged parts was 2-3, which could provide reference for engineering.

Key words: enlarged part number, enlarged part resistance, ABAQUS, net growth rate of bearing capacity, enlarged part, enlarged part position

CLC Number: 

  • TU473
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