摘要
针对敏感地层中盾构切桩下穿施工易引起既有隧道变形开裂问题,提出了局部隔墙+桩基加固保护隧道后盾构直接切桩通过的施工方案。采用规范法验证了方案的可行性,并建立三维桩-土-隧道有限元模型分析了不同施工工况下隧道结构的应力和变形响应。根据土压-泥水双模盾构设备特点及地层特性提出了针对性的施工控制要点,最终将隧道最大变形控制在5.9mm、稳定变形控制在4.5mm。
To address the issue of deformation and cracking in existing road box culverts and tunnels caused by shield tunneling through piles in sensitive strata,a construction scheme of the shield directly cutting through the piles involving partial partition walls and pile foundation reinforcement for tunnel protection was proposed.The feasibility of this scheme was verified by the standard method,and a three-dimensional pile-soil-tunnel finite element model was established to analyze the stress and deformation responses of the tunnel structure under different construction conditions.Based on the characteristics of the earth pressure-balance slurry shield machine and the properties of the strata,targeted construction control points were proposed.Ultimately,the maximum tunnel deformation was controlled at 5.9mm,and the stable deformation was controlled at 4.5mm.
作者
康安帅
余俊
刘翼豪
沈侃
KANG Anshuai;YU Jun;LIU Yihao;SHEN Kan(China Communications(Guangzhou)Construction Co.,Ltd.,Guangzhou,Guangdong 511458,China;CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan,Hubei 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei 430040,China)
出处
《施工技术(中英文)》
2026年第2期111-118,共8页
Construction Technology
基金
中交第二航务工程局有限公司立项课题(JSKF-20220331-001)。
关键词
桩
隧道
盾构
敏感地层
切削
变形
数值模拟
piles
tunnels
shields
sensitive strata
cutting
deformation
simulation
