Article(id=1273953256284869518, tenantId=1146029695717560320, journalId=1272209045839646724, issueId=1273953231114887613, articleNumber=null, orderNo=null, doi=10.20174/j.JUSE.2026.02.08, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1747584000000, receivedDateStr=2025-05-19, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1781663725205, onlineDateStr=2026-06-17, pubDate=1776614400000, pubDateStr=2026-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1781663725205, onlineIssueDateStr=2026-06-17, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1781663725205, creator=13701087609, updateTime=1781663725205, updator=13701087609, issue=Issue{id=1273953231114887613, tenantId=1146029695717560320, journalId=1272209045839646724, year='2026', volume='22', issue='2', pageStart='377', pageEnd='752', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1781663719203, creator=13701087609, updateTime=1781663760928, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1273953406235467954, tenantId=1146029695717560320, journalId=1272209045839646724, issueId=1273953231114887613, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1273953406235467955, tenantId=1146029695717560320, journalId=1272209045839646724, issueId=1273953231114887613, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=459, endPage=470, ext={EN=ArticleExt(id=1273953258071643024, articleId=1273953256284869518, tenantId=1146029695717560320, journalId=1272209045839646724, language=EN, title=Upper Bound Analysis of Passive Instability on the Excavation Face of Shallow-Buried Shield Tunnels with Longitudinal Slope, columnId=null, journalTitle=Chinese Journal of Underground Space and Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=

Due to its insufficient cover thickness, the excavation face of shallow-shield tunnels is susceptible to passive instability. Tunnel longitudinal slope lead to sudden changes in cover thickness, making the passive failure mechanism of tunnel faces more complicated. There is an urgent need to explore analytical methods for excavation face stability in shallow-buried longitudinal slope shield tunnels. Based on upper bound analysis, a two-dimensional rotation-translation mechanism is proposed that simultaneously considers tunnel longitudinal slope and local instability at the excavation face. The mechanism is comprised of two rigid translation blocks and one rigid rotation block. The ultimate support pressure and failure mode of passive instability at the excavation face are obtained. Finally, the effects of longitudinal slope δ and partial failure ratio η on ultimate support pressure and failure mode of tunnel faces are analyzed, and the reasonableness of proposed models is verified by combining with engineering cases. The results indicate that: Partial failure range of excavation faces gradually increases with the increase of longitudinal inclination angle δ. As the cover depth ratio C/D increases, partial failure of the excavation face evolves into global failure. The rotation angle θ of the rigid rotating block decreases with the increase of the longitudinal inclination δ, and the longitudinal inclination δ has a significant effect on the rotation angle θ.

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浅埋盾构隧道的覆土厚度不足导致开挖面极易被动失稳,而隧道纵坡的存在又导致覆土厚度突变,进一步加剧了开挖面被动失稳的风险,为此亟需探索浅埋纵坡盾构隧道开挖面稳定性的分析方法。基于极限分析上限法,提出了一种同时考虑隧道纵坡和开挖面局部失稳的二维旋转-平动机构,该机构由2个刚性平动块和1个刚性旋转块组成,并获得了开挖面被动失稳的极限支护压力和破坏模式。最后分析了纵坡δ和破坏比η对开挖面极限支护压力和破坏模式的影响,并结合工程实例验证了所提破坏机构的合理性。结果表明:随着纵坡δ的增加,开挖面的局部失稳范围逐渐增加;而随着埋深比C/D的增加,由开挖面的局部失稳向整体失稳演化;刚性旋转块的转角θ随着纵坡δ的增大而减小,且纵坡δ对转角θ的影响最显著。

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潘燕秋(1989—),女,河南周口人,硕士,讲师,主要从事地下结构方向的研究工作。E-mail:

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潘燕秋(1989—),女,河南周口人,硕士,讲师,主要从事地下结构方向的研究工作。E-mail:

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潘燕秋(1989—),女,河南周口人,硕士,讲师,主要从事地下结构方向的研究工作。E-mail:

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浅埋纵坡盾构隧道开挖面被动失稳的上限法分析
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潘燕秋 1 , 刘宗辉 2 , 魏魏 2
地下空间与工程学报 | 理论与试验研究 2026,22(2): 459-470
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地下空间与工程学报 | 理论与试验研究 2026, 22(2): 459-470
浅埋纵坡盾构隧道开挖面被动失稳的上限法分析
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潘燕秋1 , 刘宗辉2, 魏魏2
作者信息
  • 1.郑州工业应用技术学院 建筑工程学院,郑州 451100
  • 2.中建七局安装工程有限公司,郑州 450000
  • 潘燕秋(1989—),女,河南周口人,硕士,讲师,主要从事地下结构方向的研究工作。E-mail:

Upper Bound Analysis of Passive Instability on the Excavation Face of Shallow-Buried Shield Tunnels with Longitudinal Slope
Yanqiu Pan1 , Zonghui Liu2, Wei Wei2
Affiliations
  • 1.School of Architectural Engineering, Zhengzhou University of Industrial Technology, Zhengzhou 451100, P. R. China
  • 2.China Construction Seventh Bureau Installation Engineering Co., Ltd., Zhengzhou 450000, P. R. China
出版时间: 2026-04-20 doi: 10.20174/j.JUSE.2026.02.08
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浅埋盾构隧道的覆土厚度不足导致开挖面极易被动失稳,而隧道纵坡的存在又导致覆土厚度突变,进一步加剧了开挖面被动失稳的风险,为此亟需探索浅埋纵坡盾构隧道开挖面稳定性的分析方法。基于极限分析上限法,提出了一种同时考虑隧道纵坡和开挖面局部失稳的二维旋转-平动机构,该机构由2个刚性平动块和1个刚性旋转块组成,并获得了开挖面被动失稳的极限支护压力和破坏模式。最后分析了纵坡δ和破坏比η对开挖面极限支护压力和破坏模式的影响,并结合工程实例验证了所提破坏机构的合理性。结果表明:随着纵坡δ的增加,开挖面的局部失稳范围逐渐增加;而随着埋深比C/D的增加,由开挖面的局部失稳向整体失稳演化;刚性旋转块的转角θ随着纵坡δ的增大而减小,且纵坡δ对转角θ的影响最显著。

浅埋隧道  /  盾构开挖面  /  隧道纵坡  /  局部失稳  /  被动稳定性  /  上限法分析

Due to its insufficient cover thickness, the excavation face of shallow-shield tunnels is susceptible to passive instability. Tunnel longitudinal slope lead to sudden changes in cover thickness, making the passive failure mechanism of tunnel faces more complicated. There is an urgent need to explore analytical methods for excavation face stability in shallow-buried longitudinal slope shield tunnels. Based on upper bound analysis, a two-dimensional rotation-translation mechanism is proposed that simultaneously considers tunnel longitudinal slope and local instability at the excavation face. The mechanism is comprised of two rigid translation blocks and one rigid rotation block. The ultimate support pressure and failure mode of passive instability at the excavation face are obtained. Finally, the effects of longitudinal slope δ and partial failure ratio η on ultimate support pressure and failure mode of tunnel faces are analyzed, and the reasonableness of proposed models is verified by combining with engineering cases. The results indicate that: Partial failure range of excavation faces gradually increases with the increase of longitudinal inclination angle δ. As the cover depth ratio C/D increases, partial failure of the excavation face evolves into global failure. The rotation angle θ of the rigid rotating block decreases with the increase of the longitudinal inclination δ, and the longitudinal inclination δ has a significant effect on the rotation angle θ.

shallow-buried tunnel  /  shield excavation face  /  tunnel longitudinal slope  /  partial failure  /  passive stability  /  upper bound analysis
潘燕秋, 刘宗辉, 魏魏. 浅埋纵坡盾构隧道开挖面被动失稳的上限法分析. 地下空间与工程学报, 2026 , 22 (2) : 459 -470 . DOI: 10.20174/j.JUSE.2026.02.08
Yanqiu Pan, Zonghui Liu, Wei Wei. Upper Bound Analysis of Passive Instability on the Excavation Face of Shallow-Buried Shield Tunnels with Longitudinal Slope[J]. Chinese Journal of Underground Space and Engineering, 2026 , 22 (2) : 459 -470 . DOI: 10.20174/j.JUSE.2026.02.08
  • 陕西省自然科学基础研究计划(2022JQ-375)
  • 中建七局科技研发课题(CSCEC7b-2023-G-005)
  • 中建七局科技研发课题(CSCEC7b-2023-G-006)
2026年第22卷第2期
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doi: 10.20174/j.JUSE.2026.02.08
  • 接收时间:2025-05-19
  • 首发时间:2026-06-17
  • 出版时间:2026-04-20
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  • 收稿日期:2025-05-19
基金
陕西省自然科学基础研究计划(2022JQ-375)
中建七局科技研发课题(CSCEC7b-2023-G-005)
中建七局科技研发课题(CSCEC7b-2023-G-006)
作者信息
    1.郑州工业应用技术学院 建筑工程学院,郑州 451100
    2.中建七局安装工程有限公司,郑州 450000
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2种不同金属材料的力学参数

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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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