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To investigate the impact of changes in end-bearing conditions, resulting from shield tunneling, on the bearing capacity of an upper cement-soil pile composite foundation, this study is conducted based on a specific section of the Zhengzhou Metro Line 5 where shield machines cut through cement-soil piles. According to the principle of similarity, a reduced-scale model test of a single cement-soil pile within a composite foundation was designed for laboratory testing. Based on this, a corresponding finite element analysis model was established. By comparing the results from the reduced-scale model test and numerical simulations, the variation patterns of side resistance and end-bearing resistance of the cement-soil pile composite foundation were analyzed as the pile characteristics changed. Studies indicate after the lower part of the cement-soil pile composite foundation undergoes shield tunneling while maintaining a constant vertical load above, there is primarily a redistribution of stress within individual piles, characterized by a transformation between side resistance and end-bearing resistance to balance the upper load. Simultaneously, the neutral point of the side resistance of the cement-soil pile composite foundation moves downward, and its position relative to the pile length is less than that observed in the case where only the pile length is shortened. The change in the length of the cut pile significantly influences the development of side and end-bearing resistances; the contribution of side resistance decreases with an increase in the cut length, whereas the extent to which end-bearing resistance is mobilized slightly increases as the cut length grows.

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为探讨盾构穿切水泥土桩复合地基对地基承载性能的影响,基于郑州地铁5号线某区间盾构切削水泥土桩复合地基工程,依据相似原理设计开展了室内水泥土桩复合地基缩尺模型试验,并以此为基础建立相应的有限元分析模型。通过缩尺模型试验和数值模拟结果,分析水泥土桩复合地基桩体变化时水泥土桩复合地基中桩侧阻力和桩端阻力的变化规律。研究表明:水泥土桩复合地基在上部竖向荷载保持不变情况下经历盾构下部穿切施工后主要在单桩内产生应力重分配,同时水泥土桩复合地基桩侧阻力中性点向下移动;盾构下部穿切桩体长度的变化会对桩侧阻力和桩端阻力发挥程度存在较大影响,桩侧阻力贡献度会随切桩长度的增加有所下降,桩端阻力发挥程度会随着持力层的改善稍有增加。

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郭院成(1965—),男,河南辉县人,博士,教授,主要从事复合地基、基坑支护等领域的教学与科研工作。E-mail:

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郭院成(1965—),男,河南辉县人,博士,教授,主要从事复合地基、基坑支护等领域的教学与科研工作。E-mail:

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郭院成(1965—),男,河南辉县人,博士,教授,主要从事复合地基、基坑支护等领域的教学与科研工作。E-mail:

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盾构切桩后水泥土桩复合地基试验与模拟分析
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郭院成 , 刘煜 , 陶伟
地下空间与工程学报 | 理论与试验研究 2026,22(2): 611-621
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地下空间与工程学报 | 理论与试验研究 2026, 22(2): 611-621
盾构切桩后水泥土桩复合地基试验与模拟分析
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郭院成 , 刘煜, 陶伟
作者信息
  • 郑州大学 土木工程学院,郑州 450001
  • 郭院成(1965—),男,河南辉县人,博士,教授,主要从事复合地基、基坑支护等领域的教学与科研工作。E-mail:

Test and Simulation Analysis of Cement Soil Pile Composite Foundation after Shield Tunneling Pile Cutting
Yuancheng Guo , Yu Liu, Wei Tao
Affiliations
  • School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
出版时间: 2026-04-20 doi: 10.20174/j.JUSE.2026.02.23
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为探讨盾构穿切水泥土桩复合地基对地基承载性能的影响,基于郑州地铁5号线某区间盾构切削水泥土桩复合地基工程,依据相似原理设计开展了室内水泥土桩复合地基缩尺模型试验,并以此为基础建立相应的有限元分析模型。通过缩尺模型试验和数值模拟结果,分析水泥土桩复合地基桩体变化时水泥土桩复合地基中桩侧阻力和桩端阻力的变化规律。研究表明:水泥土桩复合地基在上部竖向荷载保持不变情况下经历盾构下部穿切施工后主要在单桩内产生应力重分配,同时水泥土桩复合地基桩侧阻力中性点向下移动;盾构下部穿切桩体长度的变化会对桩侧阻力和桩端阻力发挥程度存在较大影响,桩侧阻力贡献度会随切桩长度的增加有所下降,桩端阻力发挥程度会随着持力层的改善稍有增加。

水泥土桩复合地基  /  盾构切桩  /  工作性状  /  模型试验  /  数值分析

To investigate the impact of changes in end-bearing conditions, resulting from shield tunneling, on the bearing capacity of an upper cement-soil pile composite foundation, this study is conducted based on a specific section of the Zhengzhou Metro Line 5 where shield machines cut through cement-soil piles. According to the principle of similarity, a reduced-scale model test of a single cement-soil pile within a composite foundation was designed for laboratory testing. Based on this, a corresponding finite element analysis model was established. By comparing the results from the reduced-scale model test and numerical simulations, the variation patterns of side resistance and end-bearing resistance of the cement-soil pile composite foundation were analyzed as the pile characteristics changed. Studies indicate after the lower part of the cement-soil pile composite foundation undergoes shield tunneling while maintaining a constant vertical load above, there is primarily a redistribution of stress within individual piles, characterized by a transformation between side resistance and end-bearing resistance to balance the upper load. Simultaneously, the neutral point of the side resistance of the cement-soil pile composite foundation moves downward, and its position relative to the pile length is less than that observed in the case where only the pile length is shortened. The change in the length of the cut pile significantly influences the development of side and end-bearing resistances; the contribution of side resistance decreases with an increase in the cut length, whereas the extent to which end-bearing resistance is mobilized slightly increases as the cut length grows.

cement-soil pile composite foundation  /  shield tunneling cutting  /  performance characteristics  /  model experiment  /  numerical analysis
郭院成, 刘煜, 陶伟. 盾构切桩后水泥土桩复合地基试验与模拟分析. 地下空间与工程学报, 2026 , 22 (2) : 611 -621 . DOI: 10.20174/j.JUSE.2026.02.23
Yuancheng Guo, Yu Liu, Wei Tao. Test and Simulation Analysis of Cement Soil Pile Composite Foundation after Shield Tunneling Pile Cutting[J]. Chinese Journal of Underground Space and Engineering, 2026 , 22 (2) : 611 -621 . DOI: 10.20174/j.JUSE.2026.02.23
  • 河南省重点研发专项(231111322100)
  • 河南省自然科学基金面上项目(222300420555)
2026年第22卷第2期
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doi: 10.20174/j.JUSE.2026.02.23
  • 接收时间:2025-05-21
  • 首发时间:2026-06-17
  • 出版时间:2026-04-20
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  • 收稿日期:2025-05-21
基金
河南省重点研发专项(231111322100)
河南省自然科学基金面上项目(222300420555)
作者信息
    郑州大学 土木工程学院,郑州 450001
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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