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Volume 44 Issue S1
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XIN Gong-feng, ZHOU Hai-zuo, ZHANG Wen-liang, ZHENG Gang, YANG Xin-yu, YU Xiao-xuan, XU Shi-qian. Influences of column cap on progressive failure and stability characteristics of column-supported embankments[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S1): 63-67. DOI: 10.11779/CJGE2022S1012
Citation: XIN Gong-feng, ZHOU Hai-zuo, ZHANG Wen-liang, ZHENG Gang, YANG Xin-yu, YU Xiao-xuan, XU Shi-qian. Influences of column cap on progressive failure and stability characteristics of column-supported embankments[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S1): 63-67. DOI: 10.11779/CJGE2022S1012
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Influences of column cap on progressive failure and stability characteristics of column-supported embankments

  • 1.

    Shandong Key Laboratory of Highway Technology and Safety Assessment, Jinan 250098, China

  • 2.

    Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education, Tianjin 300072, China

  • 3.

    Shandong Hi-speed Group Innovation Research Institute, Jinan 250098, China

  • 4.

    School of Civil Engineering, Tianjin University, Tianjin 300072, China

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  • Received Date: September 27, 2022
  • Available Online: February 06, 2023
    Graphical Abstract
    • Abstract
  • The design of cap in rigid columns, which has been widely used in engineering practice, can avoid the stress concentration at the column top and enhance the performance of composite foundation. However, the effects of the cap on the stability and progressive failure of rigid column-supported embankment is relatively lacking. A finite difference numerical model is established to simulate the behavior of rigid columns with cap. The influences of the cap on the stress and failure mode of the columns under embankment loads are analyzed, and those of different cap sizes on the stability of embankment are compared. The results show that the tensile stress and the bending moment decrease significantly when cap is used, and the critical failure mode is bending failure. Compared with that of the case without cap, the continuous failure of the case with cap is more obvious. An increase in the cap size can effectively reduce the loads on the columns and improve the stability of the embankment, but there is a risk of cap damage. Therefore, it is necessary to estimate the bearing capacity of the cap in the design.
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    • References (10)
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