土工基础

土工基础 ›› 2026, Vol. 40 ›› Issue (2): 378-382.

• 测试技术 • 上一篇    下一篇

强风化泥岩桩基承载力折减系数试验研究

陈涛1，陶文俊1，崔晓1，丁亚2，李梁缘2，蔡成喜2，曹威3   

  1. （1.江苏华美建设投资集团有限公司，江苏徐州 221000；2.徐州长城基础工程有限公司，江苏徐州 221000；3.中国矿业大学，江苏徐州 221000）
  • 收稿日期:2025-07-15 修回日期:2025-07-25 出版日期:2026-04-30 发布日期:2026-04-23
  • 作者简介:陈涛（1980-），男，高级工程师，研究方向为地基基础。

Experimental Study on Axial Capacity Reduction Factor of Pile in Strongly Weathered Mudstone

CHEN Tao1, TAO Wenjun1, CUI Xiao1, DING Ya2, LI Liangyuan2, CAI Chengxi2, CAO Wei3   

  1. (1.Jiangsu Huamei Construction Investment Group Co. Ltd., Xuzhou 221000;
    2.Xuzhou Great Wall Foundation Engineering Co. Ltd., Xuzhou 221000;
    3.University of Mining and Technology, Xuzhou 221000)
  • Received:2025-07-15 Revised:2025-07-25 Online:2026-04-30 Published:2026-04-23

摘要： 为分析泥岩桩基承载力折减系数的相关理论和实践应用，进而得到准确的强风化泥岩桩基承载力，以徐州鼓楼区北站东地块桩基工程为实际背景，通过室内试验的方法，制备了泥岩重塑样进行泥岩力学特性试验，研究了泥岩重塑样在不同试验条件下承载力的折减系数。研究结果表明，泥岩重塑样单轴抗压强度折减系数的合理取值范围在0.75~0.85之间。三轴压缩强度折减系数的合理取值范围是0.4~0.6之间。侧限静压强度折减系数的合理取值范围是0.7~0.9之间。鉴于桩基工程中实际承载力存在不准确的问题，对泥岩预制桩的承载力公式进行了修正，旨在引起专业技术人员对桩基承载力可能不准确问题的关注。

关键词: 泥岩重塑样, 室内试验, 桩基承载力, 折减系数

Abstract: This study explores and analyzes the relevant theories and practical applications of the reduction factor for the axial capacity of pile in mudstone. The range of the reduction factor and the accurate axial capacity of piles in strongly weathered mudstone formation are investigated. This paper presents pile project case history of the east block of North Railway Station in Gulou District, Xuzhou City. The mudstone properties are tested through remolded mudstone samples, and the reduction coefficient of the axial capacity of piles in mudstone reshaping samples under different test conditions is also investigated. The results show that the reasonable value range of the uniaxial compressive strength reduction coefficient of mudstone reshaped samples is between 0.75 and 0.85. The reasonable value range of the triaxial compression strength reduction coefficient is between 0.4 and 0.6. The reasonable range of the reduction coefficient of lateral static pressure strength is between 0.7 and 0.9. The large variation of axial capacity of precast prestressed reinforced concrete pile in mudstone in the practice is also modified based on the investigation results.

Key words: Remolded Mudstone Samples, Laboratory Tests, Axial Capacity of Pile, Reduction Factor

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