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Volume 46 Issue S2
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ZHANG Kunbiao, WANG Yimin, CHEN Yekai, QIU Shen, YI Hao, ZENG Zhaoyu. Mechanism of reinforcement of squeezed branch piles for deep soft foundation based on load bearing capacities[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S2): 97-102. DOI: 10.11779/CJGE2024S20009
Citation: ZHANG Kunbiao, WANG Yimin, CHEN Yekai, QIU Shen, YI Hao, ZENG Zhaoyu. Mechanism of reinforcement of squeezed branch piles for deep soft foundation based on load bearing capacities[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S2): 97-102. DOI: 10.11779/CJGE2024S20009
shu

Mechanism of reinforcement of squeezed branch piles for deep soft foundation based on load bearing capacities

  • 1.

    School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China

  • 2.

    Guangdong Communication Planning & Design Institute Group Company, Guangzhou 510440, China

  • 3.

    Guangdong Transportation Construction Engineering Quality Inspection Center, Guangzhou 510420, China

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  • Received Date: June 20, 2024
    Graphical Abstract
    • Abstract
  • To address the layout of squeezed branch (SB) piles in deep soft soil, a 3D numerical model is established based on the single pile static load tests on the SB pile application project in Shantou soft soil area. The load sharing characteristics and the branch-soil interaction mechanism are investigated during the settlement development. The results show that the load sharing ratio at the pile tip of the SB piles that do not penetrate through deep soft foundation is 19.6%, significantly lower than that of straight piles. The group efficiency ηg of the SB piles is correlated to the number of piles N and pile spacing Sp, with an optimal spacing of 8d recommended for the SB piles in deep soft soil regions. The tip of branch, particularly the lower branch, can transfer a considerable load to the surrounding soil under the ultimate settlement conditions. The inter-branch spacing Sb affects the load bearing of piles by altering the properties of soil stratum of branches.
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