摘要
以武汉市某基坑邻近运营轨道交通2号线区间隧道施工为背景,基于Midas GTS NX软件研究了基坑施工对隧道结构的影响。结果表明:基坑施工会对区间隧道临近基坑侧土体产生一定的扰动,进而对区间隧道结构产生一定的不利影响,隧道最大竖向位移为上浮2.43 mm,最大水平位移为2.52 mm,均在运营隧道规范变形允许范围。
Based on the tunnel construction of a foundation pit adjacent to the operating rail transit line 2 in Wuhan city,the influence of foundation pit construction on tunnel structure was studied based on Midas GTS NX software.The results show that the excavation of the foundation pit will cause certain disturbance to the soil near the foundation pit of the interval tunnel,which will have a certain adverse effect on the structure of the interval tunnel.The maximum vertical displacement of the tunnel is 2.43 mm,and the maximum horizontal displacement is 2.52 mm,both of which are within the allowable range of the deformation of the operating tunnel.
作者
张存
ZHANG Cun(China Railway Siyuan Survey and Design Group Co.,Ltd.,Hubei Wuhan 430063 China)
关键词
基坑开挖
运营地铁隧道
数值计算
扰动
foundation pit excavation
operation of subway tunnels
numerical calculation
disturbance
