摘要
以重庆快速路三纵线红石路隧道与轨道五号线地下车站平行布置,下穿地表既有建筑物为工程背景,采用有限元软件模拟分析隧道施工过程周边围岩及邻近结构的位移、应力等特性,研究表明隧道受上部建筑附加荷载的影响,拱顶围岩应力应变改变较大,应加强初期支护控制围岩变形;浅埋大跨隧道下穿既有构筑物应相对于既有建筑物对称布置,隧道左右洞交错掘进施工更有利于控制上方建筑物的倾斜。
The Hongshi Road tunnel of the Chongqing third vertical line expressway that underground the exsiting buidings and near the station of Track Line 5 is taken as the engineering background,the existing structures characteristics is analyzed such as the displacement and the stress of the surrounding rock and neighbouring structures by finite element software during tunnel construction.The results show that the surrounding rock above the arch roof is affected by additional load of the superstructure,whose stress and strain are changed greatly,and the initial support shoud be strengthened to control the deformation of surrounding rock;the shallow buried large-span tunnel underpassed the existing structure should be symmetrically arranged relative to the existing buildings.;the staggered excavation of left and right tunnels is more conducive to controlling the inclination of the buildings above.
作者
胡文亮
HU Wenliang(Chongqing Architectural Design Institute Co.,Ltd.,Chongqing 400015)
出处
《公路交通技术》
2021年第2期84-88,共5页
Technology of Highway and Transport
关键词
地下车站
浅埋隧道
有限元
受力特性
underground station
shallow buried tunnel
finite element
force characteristics
