| 浅埋砂卵石土层隧道掌子面主动稳定性上限分析 |
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| 引用本文： | 葸振东,孙鹤明,张书香,刘生,张波.浅埋砂卵石土层隧道掌子面主动稳定性上限分析[J].路基工程,2020,0(5):172-176. |
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| 作者姓名： | 葸振东 孙鹤明 张书香 刘生 张波 |
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| 作者单位： | 中交一公局集团有限公司,北京100024 |
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| 摘 要： | 依托成都地铁17号线明光站—九江北站盾构法施工区间，通过极限分析上限法及PLAXIS有限元分析方法探究影响浅埋盾构隧道掌子面的影响因素，分析内摩擦角、隧道埋深、隧道断面直径及土体容重对掌子面主动稳定性的影响。研究表明:掌子面支护力随隧道埋深C、隧道断面直径D及土体容重γ的增大而增大，而随内摩擦角φ的增大而非线性减小，且内摩擦角对支护力的影响最为显著。
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| 关 键 词： | 隧道掌子面 盾构施工 主动破坏 极限分析上限法 有限元分析 卵石土层 |
| 收稿时间： | 2020-05-26 |
Upper Limit Analysis of the Active Stability of Tunnel Face in Shallow-buried Sand and Cobble Soil Layer |
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| Abstract: | Based on the shield method construction section of Mingguang station to Jiujiang North Station of Chengdu Metro Line 17, through the upper limit analysis method and PLAXIS finite element analysis method, the influence factors of shallow-buried shield tunnel face are explored, and the influence of internal friction angle, tunnel buried depth, tunnel section diameter and soil bulk density on the active stability of the face is analyzed. The results show that the supporting force of face increases with the increase of buried depth C, tunnel section diameter D and soil bulk density γ, but decreases nonlinearly with the increase of internal friction angle, and the influence of internal friction angle on supporting force is the most significant. |
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