土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (4): 658-663.

• 测试技术 • 上一篇    下一篇

桩-土界面力学特性试验系统的研制与应用测试

马秀如1,2，冯健雪1,2，萧 和1,2，罗 湛1,2，刘枭伟1,2   

  1. (1.贵州民族大学建筑工程学院，贵阳 550025；2.贵州省工程地质灾害防治工程研究中心，贵阳 550025）
  • 收稿日期:2023-07-07 修回日期:2023-08-24 出版日期:2025-08-31 发布日期:2025-08-27
  • 通讯作者: 冯健雪（1985-），男，博士，副教授，研究方向为岩土工程。
  • 作者简介:马秀如（1997-），女，硕士研究生，研究方向为岩土工程。
  • 基金资助:
    国家自然科学基金（No.52008124，52268054）；中国博士后科学基金资助项目（No.2020M683210）

Development and Application Testing of a System for Investigating the Mechanical Characteristics of Pile-Soil Interfaces

MA Xiuru1,2, FENG Jianxue1,2, XIAO He1,2, LUO Zhan1,2, LIU Xiaowei1,2   

  1. (1.School of Civil Engineering, Guizhou Minzu University, Guiyang 550025;
    2.Guizhou Engineering Research Center for Engineering Geological Disaster Prevention and Control, Guiyang 550025)
  • Received:2023-07-07 Revised:2023-08-24 Online:2025-08-31 Published:2025-08-27

摘要： 桩-土界面的力学特性是影响桩基安全施工和健康运营的关键问题，对其分析是揭示桩基变形和承载力机理的重要环节。鉴于此，研制了一种桩-土界面力学特性模型试验系统，采用PLC自动化控制技术控制竖向加载速率和位移，同时能考虑不同地基固结状态、含水率及复杂受荷情况。为了验证试验系统的可靠性和有效性，分析了不同含水率的红黏土桩基贯入过程中桩土界面的力学性状，并与数值模拟结果进行了对比验证。结果显示，土体的非饱和性显著提高了桩-土界面的土压力及单位桩侧摩阻力，试验结果与数值模拟结果吻合较好。本模型试验系统可为桩基工程实践中提供试验支持和理论参考。

关键词: 桩基础, 模型试验, 数值模拟, 静压桩, 桩土界面力学特性

Abstract: The mechanical properties of the pile-soil interface are a crucial issue that affects the safe construction and healthy operation of pile foundations. Analyzing these properties is an essential step to uncovering the deformation and bearing capacity mechanisms of the pile foundation. Therefore, this paper developed a pile-soil interface mechanical properties model test system, which uses PLC automation control technology to control the vertical loading rate and displacement. The system also considers different ground settlement states, moisture content, and complex loading conditions. To verify the reliability and effectiveness of the test system, the mechanical properties of the pile-soil interface during the penetration process of a red clay pile with different moisture contents were analyzed and compared with numerical simulation results. The results revealed that the unsaturation of the soil significantly increases the soil pressure and unit lateral friction of the pilesoil interface. The test results agreed well with the numerical simulation results. This model test system can provide experimental support and theoretical references for pile foundation engineering practices.

Key words: Pile Foundation, Model Testing, Numerical Simulation, Static Pressed Piles, PileSoil Interface Mechanical Properties

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