水下盾构隧道施工渗流影响及加固措施分析
Analysis of seepage influence and reinforcement measures during underwater shield tunnel construction
王锐1
作者信息
- 1. 中铁十八局集团市政工程有限公司,天津 300222
- 折叠
摘要
依托福州地铁区间盾构隧道下穿潘墩河工程,结合数值模拟探讨盾构隧道在有无渗流因素影响下的围岩变形和塑性区分布,并提出相应的加固措施,最终研究成果表明:未考虑渗流的盾构施工产生的最大变形为0.88 mm,考虑渗流后围岩变形增加23％,未考虑渗流的围岩塑性区范围相对较小,表明水下盾构隧道施工会对围岩位移产生较大影响;采用帷幕注浆加固后,围岩最大位移为0.65 mm,表明帷幕注浆能降低渗流影响,减小围岩位移.
Abstract
Relying on the Fuzhou Metro Interval Shield Tunnel Crossing Pandun River Project,numerical simulation was used to explore the surrounding rock deformation and plastic zone dis-tribution of the shield tunnel with or without the influence of seepage factors,and corresponding reinforcement measures were proposed.The final research results showed that:The maximum deformation caused by shield tunnel construction considering seepage is 0.88 mm.After consid-ering seepage,the deformation of the surrounding rock increases by 23％.The plastic zone of the surrounding rock without considering seepage is relatively small,indicating that the construction of underwater shield tunnel will cause displacement of the surrounding rock.Larger impact;after using curtain grouting for reinforcement,the maximum displacement of the surrounding rock is 0.65 mm,indicating that curtain grouting can reduce the influence of seepage and reduce the dis-placement of the surrounding rock.The research results can provide reference for similar engi-neering cases of underwater shield tunnels.
关键词
盾构隧道/渗流影响/数值模拟/加固措施Key words
shield tunnel/influence of seepage/numerical simulation/reinforcement measures引用本文复制引用
出版年
2024
NETL
NSTL
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