›› 2014, Vol. 35 ›› Issue (4): 1131-1140.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of bearing behavior of a single pile considering progressive failure of pile-soil system

LIN Chun-jin1，ZHANG Qian-qing1, 2, 3，LIANG Fa-yun2，ZHANG Qian1，LIU Hong-liang1   

  1. 1. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
  • Received:2013-07-24 Online:2014-04-10 Published:2014-04-18

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Abstract: In light of that the progressive deformation of pile-soil system is not taken into account in the determination of bearing behavior of pile at present, field test and theoretical analysis are used to analyze the bearing mechanism of single pile considering progressive failure of pile-soil system. Firstly, the skin friction degradation and end resistance softening are analyzed using field test results; and then the softening models of skin friction and end resistance are proposed. Furthermore, determinations of the parameters related to the softening model of skin friction and end resistance are presented, and the reliability of the proposed models is demonstrated. As to the bearing behavior of a single pile considering progressive failure of pile-soil system, a highly effective iterative computer program is developed using the proposed softening model. Comparisons of the load-settlement response demonstrate that the proposed method is generally in good agreement with the field-observed behavior, and can assess the failure characteristic of skin friction and end resistance. For practical purposes, different load transfer functions of skin friction and end resistance can be selected in the proposed iterative computer program to capture a single pile response at different loading levels.

Key words: single pile loaded to failure, progressive failure, bearing behavior, softening model of skin friction, softening model of end resistance

CLC Number: 

  • TU 473.1
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