›› 2011, Vol. 32 ›› Issue (2): 503-509.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of characteristics of compression capacity and negative skin friction for belled wedge pile

KONG Gang-qiang 1, 2, YANG Qing2, NIAN Ting-kai2, HU Qing-chun3   

  1. 1. Key Laboratory of Education Ministry for Geomechanics and Embankment Engineering, Hohai University; Nanjing 210098, China; 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 3. Architecture & City Planning College, Hunan City University, Yiyang, Hunan 413000, China
  • Received:2009-09-21 Online:2011-02-10 Published:2011-02-16

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Abstract:

Based on conventional belled pile and wedge pile, a new type pile, belled wedge pile, which can improve pile shaft friction, tip resistance and reduce the influence of negative skin friction is developed. The stress mechanism and construction method of belled wedge pile is briefly introduced. Based on FLAC3D, The results are verified by engineering examples analysis; the mechanical properties on compression capacity and negative skin friction of belled wedge pile is preliminary studied. Conventional belled pile, wedge pile and equal section pile which are in the same concrete volume are comparatively analyzed. The mechanical properties of belled wedge pile which influenced by modulus ratio of pile end soil and pile surrounding soil, wedge angles, the diameter of enlarged pile head and the modulus of pile are discussed. It is shown that, when in the same surface load grade, the downdrag of belled wedge pile is minimum; the dragload of belled wedge pile is between the values of conventional belled pile and wedge pile.

Key words: pile foundation, compression, negative skin friction, belled wedge pile, numerical simulation

CLC Number: 

  • TU 375.4
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