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山东大学学报 (工学版) ›› 2025, Vol. 55 ›› Issue (5): 120-129.doi: 10.6040/j.issn.1672-3961.0.2024.135

• 土木工程 • 上一篇    

基坑全回收HLC组合钢桩工作机理

李连祥1,2,3,邱叶凡1,2*,韩一鸣1,2,张菊连4,李庆中5,车秀熙1,2   

  1. 1.山东大学基坑与深基础工程技术研究中心, 山东 济南 250061;2.山东大学土建与水利学院, 山东 济南 250061;3.山东高速岩土工程有限公司, 山东 济南 250102;4.上海宏信设备工程有限公司, 上海 201806;5.瑞马丸建(安徽)工程支护科技有限公司, 安徽 马鞍山 243003
  • 发布日期:2025-10-17
  • 作者简介:李连祥(1966— ),男,河北唐山人,教授,博士生导师,博士,主要研究方向为基坑工程理论与技术. E-mail:jk_doctor@163.com. *通信作者简介:邱叶凡(2000— ),女,山东潍坊人,硕士研究生,主要研究方向为基坑全回收围护结构. E-mail:2430276544@qq.com
  • 基金资助:
    国家自然科学基金资助项目(51508310);山东省优秀中青年科学家科研基金资助项目(BS2013SF024);济南市科技计划资助项目(201201145)

The working mechanism of HLC composite steel pile with full recovery in foundation pit

LI Lianxiang1,2,3, QIU Yefan1,2*, HAN Yiming1,2, ZHANG Julian4, LI Qingzhong5, CHE Xiuxi1,2   

  1. LI Lianxiang1, 2, 3, QIU Yefan1, 2*, HAN Yiming1, 2, ZHANG Julian4, LI Qingzhong5, CHE Xiuxi1, 2(1. Shandong University Foundation Pit and Deep Foundation Engineering Technology Research Center, Jinan 250061, Shandong, China;
    2. College of Civil Engineering and Water Conservancy, Shandong University, Jinan 250061, Shandong, China;
    3.Shandong Hi-Speed Geotechnical Engineering Co., Ltd., Jinan 250102, Shandong, China;
    4. Shanghai Hongxin Equipment Engineering Co., Ltd., Shanghai 201806, China;
    5. Ruima Wanjian(Anhui)Construction Protecting Technology Co., Ltd., Maanshan 243003, Anhui, China
  • Published:2025-10-17

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摘要： 为优化H型钢-拉森钢板桩连接(H-pile and Larsen sheet pile connected,HLC)组合钢桩在基坑支护中的应用,解决现有设计中H型钢和钢板桩土压力分担不明确的问题,本研究采用理论分析、现场实测和数值模拟相结合的方法,推导了HLC组合钢桩在理想状态和实际状态下惯性矩的计算公式,提出截面刚度折减系数与协同系数的计算方法,分析HLC钢桩刚度折减系数沿深度的变化规律,从而表征整体结构的工作性能。结果表明,各个支护桩的土压力分担比不符合理论刚度分配规律,单独钢板桩的土压力分担比可达10%,实际支护刚度应考虑各支护单元间的相互作用。该研究可为悬臂式HLC基坑支护结构设计提供理论参考。

关键词: HLC钢桩, 钢板桩, 截面应力, 刚度折减, 协同系数

Abstract: To optimize the application of HLC composite steel piles in foundation pit support and solve the problem of unclear soil pressure sharing between H-shaped steel and steel sheet piles in the existing design, this study adopted a combined method of theoretical analysis, on-site measurement, and numerical simulation. The calculation formulas for the moment of inertia of HLC composite steel piles in ideal and actual states were derived. The calculation methods for the section stiffness reduction coefficient and the synergy coefficient were proposed. The variation law of the stiffness reduction coefficient of HLC composite steel piles along the depth was analyzed to characterize the working performance of the overall structure. The results showed that the earth pressure sharing ratio of each supporting pile did not conform to the theoretical stiffness distribution law, with that of a single steel sheet pile reaching up to 10%. The actual supporting stiffness should take into account the interaction between the supporting units. This study could provide a theoretical reference for the design of cantilever HLC foundation pit support structures.

Key words: HLC steel pile, steel sheet pile, section stress, stiffness reduction, cooperativity coefficient

中图分类号: 

  • TU392.1
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