›› 2012, Vol. 33 ›› Issue (10): 2947-2952.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Model testing study of vertical bearing behaviors for large diameter pile with variable cross-section (I)

FANG Tao1, 2, LIU Xin-rong1, 3, GENG Da-xin2, LUO Zhao2, JI Xiao-tuan2, ZHENG Ming-xin2   

  1. 1. College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. College of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China; 3. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, China
  • Received:2011-05-19 Online:2012-10-10 Published:2012-10-19

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Abstract: Large diameter pile with variable cross-sections is applied to the region of bride engineering and foundation treatment. It is necessary to study the vertical bearing behaviors and working mechanism. The relation between vertical bearing capacity and settlement & distribution of the axial forces and skin friction along pile and failure mode of the pile are discussed based on laboratory test. According to the test, it is concluded that it is clear that the vertical bearing behaviors of the pile is affected by the ratio of variable diameters b value; the b is more smaller, the vertical bearing capacity is more smaller. It is proved that how to choose the b is controlled by the lateral bearing behaviors. The squeezing effect is not clear to improve the vertical bearing capacity unless the top displacement of the pile reaches a certain value.

Key words: Large diameter pile with variable cross-section, model test, vertical bearing behaviors

CLC Number: 

  • TU 473.1
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