理论与试验研究

同步同心钢管—水泥土复合桩轴向承载计算

  • 叶俊能 ,
  • 王忠瑾 ,
  • 史世雍 ,
  • 毛红辉 ,
  • 王乾浩
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  • 1.宁波市轨道交通集团有限公司,浙江 宁波 315010 ;
    2.浙大宁波理工学院,浙江 宁波 315100;
    3.宁波宁大地基处理技术有限公司,浙江 宁波 315211;
    4.浙江鸿晨建设有限公司,浙江 宁波 315032
叶俊能(1975—),男,福建三明人,博士,正高级工程师,主要从事基坑工程、隧道工程及地铁保护等研究。E-mail:yjn75@139.com
王忠瑾(1986—),男,山东菏泽人,博士,教授,主要从事桩基工程、能源地下结构的教学与科研。E-mail:zhongjin_wang@zju.edu.cn

收稿日期: 2025-11-11

  网络出版日期: 2026-09-07

基金资助

宁波市公益类科技计划(2024S079);国家自然科学基金(52478365)

Axial Bearing Calculation of Synchronous Concentric Steel Pipe-Cement Soil Composite Piles

  • Ye Junneng ,
  • Wang Zhongjin ,
  • Shi Shiyong ,
  • Mao Honghui ,
  • Wang Qianhao
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  • 1. Ningbo Rail Transit Group Co., Ltd., Ningbo, Zhejiang 315010, P.R. China;
    2. NingboTech University, Ningbo, Zhejiang 315100, P. R. China;
    3. Ningbo Ningda Foundation Treatment Technology Co., Ltd., Ningbo, Zhejiang 315211, P. R. China;
    4. Zhejiang Hongchen Construction Co., Ltd., Ningbo, Zhejiang 315032, P. R. China

Received date: 2025-11-11

  Online published: 2026-09-07

摘要

同步同心施工钢管—水泥土复合桩,由钢管桩、水泥土内芯水泥土外芯组成,其轴向承载性能与三者及周围土体的相互作用密切相关,其承载和变形机制十分复杂。基于现场开挖试验,将水泥土内芯与钢管桩按面积简化为等效模量实心桩,采用弹性—破坏模型模拟钢管桩与水泥土桩界面相互作用,将水泥土与周围土体的变形视为剪切变形,桩端阻力与沉降关系采用双折线模型,综合考虑钢管桩、水泥土内外芯及周围土体的变形特性,推导了该新型复合桩的轴向承载力与变形计算公式,并给出了相关参数的取值方法。通过工程实例进行对比分析,验证了方法的可行性。

本文引用格式

叶俊能 , 王忠瑾 , 史世雍 , 毛红辉 , 王乾浩 . 同步同心钢管—水泥土复合桩轴向承载计算[J]. 地下空间与工程学报, 2026 , 22(4) : 1163 -1169 . DOI: 10.20174/j.JUSE.2026.04.05

Abstract

The synchronous concentric construction of steel pipe-cement soil composite pile consists of steel pipe pile, inner cement-soil, and outer cement-soil. Its axial bearing behavior is closely related to the interactions between the three components and the surrounding soils, and its bearing and deformation mechanisms are very complex. Based on site excavation tests, the inner cement-soil and steel pipe pile were simplified into equivalent modulus solid piles by area. An elastic failure model was used to simulate the interaction between the steel pipe pile and the outer cement soil interface. The deformation of the outer cement soil and surrounding soil was considered as shear deformation, and the relationship between the pile end resistance and settlement was analyzed using a bilinear model. Taking into account the deformation characteristics of the steel pipe pile, cement-soil, and surrounding soil, the axial bearing capacity and deformation calculation formula of this new composite pile were derived, and the methods for determining the values of relevant parameters were provided. The feasibility of the above proposed method was verified through comparative analysis of engineering examples.

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