浅埋暗挖大断面隧道下穿高速公路的施工技术  

Construction Technology of Shallow Buried and Concealed Large Section Tunnel Under Expressway

作　　者：崔广振 CUI Guangzhen(The Third Engineering Co.,Ltd.of the China Railway 18th Bureau Group,Zhuozhou,Hebei 072750,China)

机构地区：[1]中铁十八局集团第三工程有限公司,河北涿州072750

出　　处：《建筑施工》2022年第1期118-120,共3页Building Construction

摘　　要：长春地铁1号线出入段线暗挖区间下穿绕城高速,隧道跨度大、埋深浅,施工难度大,地层变形控制要求高,为此,研究了浅埋隧道施工中采用的大管幕超前支护、双侧壁导坑法开挖和地层变形监测方案,重点研究了现场隧道开挖引起的地层变形特征。研究发现:隧道开挖引起掘进方向近侧高速公路路面沉降最大,其最大沉降值为37 mm;随着隧道开挖,大断面暗挖隧道引起了高速公路路面的局部隆起现象,隆起的最大值为7 mm。研究成果可为类似工程提供参考和借鉴。The underground excavation section of the entrance and exit section of Changchun Metro Line 1 underpasses the ring expressway.The tunnel has large span,shallow buried depth,great construction difficulty and high requirements for stratum deformation control.Therefore,the schemes of large pipe curtain advanced support,double side-wall heading excavation and stratum deformation monitoring adopted in the construction of shallow buried tunnel are studied,with emphasis on the characteristics of stratum deformation caused by on-site tunnel excavation.It is found that the maximum settlement of expressway pavement near the excavation direction caused by tunnel excavation is 37 mm.With the tunnel excavation,the large cross-section concealed tunnel causes the local uplift of expressway pavement,and the maximum uplift is 7 mm.The research results can provide reference for similar projects.

关 键 词：浅埋隧道 高速公路 近接下穿 管幕超前支护 

分 类 号：TU99[建筑科学—市政工程]