摘要
依托杭州至绍兴城际铁路^(#)4地下联络通道工程,针对长距离、双向冻结开挖的复杂工况,系统分析了高富水软土地层联络通道施工面临的技术难点、风险,以及高富水软土地层冻结法关键技术。通过双冻结站协同制冷、双向开挖、动态监测调控等综合措施,有效解决了高富水软土地层长距离联络通道施工冻结壁均匀性控制及近接建筑物沉降控制难题。监测结果显示:地表最大沉降仅28.6 mm,隧道收敛值2.1 mm。工期较计划缩短23%。
Based on the^(#)4 underground connecting passage project of the Hangzhou—Shaoxing Intercity Railway,this study systematically analyzed the technical challenges,risks,and key freezing techniques for constructing connecting passages in high-water-content soft soil layers under complex conditions involving long-distance and bidirectional freezing excavation.Through integrated measures such as dual freezing stations for coordinated refrigeration,bidirectional excavation,and dynamic monitoring and control,the project effectively addressed the challenges of ensuring uniform freezing wall formation and controlling settlement in adjacent structures during long-distance connecting passage construction in high-water-content soft soil layers.After monitoring,the results show:the maximum surface settlement is only 28.6 mm,and the tunnel convergence is 2.1 mm.The construction schedule is shortened by 23%compared to the original plan.
作者
李志宏
LI Zhihong(China Railway No.2 Engineering Group Co.,Ltd.,Chengdu 610032,China)
出处
《路基工程》
2025年第6期216-220,共5页
Subgrade Engineering
关键词
软土地层
高富水
近接建筑物
联络通道
双向开挖
盐水温控
动态监测
沉降控制
soft soil layer
high-water-content
adjacent structures
connecting passage
bidirectional excavation
brine temperature control
dynamic monitoring
settlement control
