地铁暗挖站台近距离下穿运营线路施工技术  

Construction Technology of Underground Platform Undercrossing the Line in Operation at Short Distance

作　　者：何勇华 HE Yonghua(China Railway No.2 Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二局集团有限公司,成都610031

出　　处：《路基工程》2022年第3期188-193,共6页Subgrade Engineering

摘　　要：以珠江三角洲地区某城市地铁11号线暗挖站台隧道近距离下穿地铁运营5号线为例,通过加强超前地质预报,采取超前大管棚、超前小导管对围岩地层进行预注浆加固,主隧道与斜通道CRD法、横通道CD法施工,上半断面悬臂掘进机施工、下半断面控制爆破等相结合的方法,各洞室初支及时封闭成环,顺利穿越了既有地铁5号线,保证了隧道施工安全和地铁运营安全。Taking the underground platform tunnel of Metro Line 11 which undercrosses the Metro Line 5 at a short distance in a city in the Pearl River Delta as an example,through strengthening the advance geological prediction,adopting the advance large pipe shed and advance small conduit to carry out pre-grouting reinforcement for the surrounding rock stratum,the construction of main tunnel and channel CRD method,cross channel CD method,the construction of cantilever TBM in the upper half section and controlled blasting in the lower half section,and the initial support of each cavern was closed into a ring in time,which successfully crossed the existing Metro Line 5,ensuring the safety of tunnel construction and metro operation.

关 键 词：地铁站台隧道 暗挖法 近距离下穿 既有地铁运营线 悬臂掘进机施工 预注浆加固 

分 类 号：U459.3[建筑科学—桥梁与隧道工程]