渗透性地层盾构同步注浆地面渗漏风险预控  

Ground Leakage Risk Pre-Control of Shield Synchronous Grouting in Permeable Stratum

作　　者：刘坤涛 LIU Kun-tao(Shanghai Tunnel Engineering Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]上海隧道工程有限公司,上海200032

出　　处：《中国市政工程》2022年第3期120-125,130,145,146,共9页China Municipal Engineering

摘　　要：针对砂性富水地层浅覆土盾构隧道施工同步注浆渗透扩散距离及地面渗漏浆风险预测和防控方面存在的问题和不足,基于虚拟微元流体柱状结构和等效流管浆液渗流特性模型,建立同步注浆浆液渗透扩散模型及渗透距离解析解。研究砂性富水地层盾构同步注浆浆液渗透扩散特性及其随注浆压力、地下水位等参数的变化特性。提出适用于隧道埋深变化的极限注浆压力预测控制方法,并将理论和方法成功应用于杭州盾构隧道工程施工中,预控注浆风险。研究成果对浅覆土渗透性富水地层盾构同步注浆状态预测和风险防控具有借鉴意义。Aiming at the problems&deficiencies in the prediction&prevention of the seepage&diffusion distance of synchronous grouting and the risk of ground leakage slurry in the construction of shallow soil shield tunnel in sandy water rich stratum,based on the virtual micro element fluid column structure&the equivalent flow pipe slurry seepage characteristic model,the seepage&diffusion model of synchronous grouting slurry and the analytical solution of seepage distance are established.The permeability&diffusion characteristics of synchronous grouting slurry for shield in sandy water rich stratum and its variation with grouting pressure,groundwater level and other parameters are studied.The prediction&control method of limit grouting pressure applicable to the variation of tunnel depth is proposed,and the theory&method are successfully applied to the construction of Hangzhou shield tunnel to pre-control the grouting risk.The research results can be used for reference in the prediction of synchronous grouting state and risk prevention&control of shield in shallow soil permeable&water rich stratum.

关 键 词：砂性富水地层 盾构同步注浆 地面渗漏 风险预控 工程应用 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]