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Volume 44 Issue S1
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GAO Deng-hui, ZHAO Kuan-yao, JIN Song-li, XING Yi-chuan, CHU Wen-shu, FAN Ji-fei, ZHU Qiong. Method for calculating negative skin friction of pile foundation in large- thickness self-weight collapsible loess sits[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S1): 231-235. DOI: 10.11779/CJGE2022S1041
Citation: GAO Deng-hui, ZHAO Kuan-yao, JIN Song-li, XING Yi-chuan, CHU Wen-shu, FAN Ji-fei, ZHU Qiong. Method for calculating negative skin friction of pile foundation in large- thickness self-weight collapsible loess sits[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S1): 231-235. DOI: 10.11779/CJGE2022S1041
shu

Method for calculating negative skin friction of pile foundation in large- thickness self-weight collapsible loess sits

  • 1.

    College of Architecture and Civil Engineering, Huanghuai University, Zhumadian 463000, China

  • 2.

    School of Civil Engineering, North China University of Technology, Beijing 100144, China

  • 3.

    China Institute of Water Resources and Hydropower Research, Beijing 100048, China

  • 4.

    School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China

  • 5.

    China Construction Third Engineering Bureau Group Co., (Shanghai), Shanghai 200129, China

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  • Received Date: September 27, 2022
  • Available Online: February 06, 2023
    Graphical Abstract
    • Abstract
  • Aiming at the problem of calculating the negative friction resistance of pile foundations in large-thickness self-weight collapsible loess sites. First, according to the similarity between the stratified settlement and the vertical displacement solution of Boussinesq. A method is proposed to calculate the soil settlement at any depth around the pile from the total self-weight collapse of the foundation. Secondly, the nonlinearity of the soil and the settlement law of the soil along the radial direction of the pile are considered, and a pile-soil load transfer function that can consider both the nonlinearity and the ultimate shear strength of the soil is proposed, which can calculate the negative skin friction, position of neutral point and settlement of pile top. The calculated results are compared with the measured ones of the field immersion tests on pile foundation, which shows the effectiveness of the proposed method. The research results can provide a new method for the design of pile foundations in collapsible loess sites and also references for the calculation of the bearing capacity of pile foundations in other sites.
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    • References (12)
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