摘要
城市隧道多需下穿市政道路且多采用暗挖法施工,因而原有岩土体平衡状态常遭到破坏,导致市政道路出现地表沉降。暗挖法施工时,隧道的地层变形是人们关注的重点,若施工时对其控制不当,往往会导致上部结构稳定性受到破坏,对工程项目的安全性造成影响。本文从地层和路基的相互作用关系作为切入角度,从时空效应方面对暗挖隧道的开挖和地层变形之间的关系进行了分析,并以某项目为研究对象,通过有限元分析软件,采用软件建模的方式对比了两种施工顺序时的隧道应力变化,以此优化隧道施工顺序,提高施工项目的安全性。
At present,most urban tunnels need to pass through municipal roads,and most of them are constructed by underground excavation method,so the original rock and soil equilibrium state is often destroyed,resulting in the surface settlement of municipal roads.The stratum deformation of tunnel is the focus of attention in the construction of underground excavation method.If it is not properly controlled during construction,the stability of the superstructure will be destroyed,which will affect the safety of the project.It is analyzed the relationship between excavation and formation deformation from the perspective of the interaction between strata and roadbed,and the relationship between excavation and formation deformation from the perspective of time and space effect.Taking a certain project as the research object,finite element analysis software is used to compare the changes of tunnel stress in two construction sequences by means of software modeling,so as to optimize the tunnel construction sequence and improve the safety of construction projects.
出处
《辽宁省交通高等专科学校学报》
2024年第1期38-41,共4页
Journal of Liaoning Provincial College of Communications
关键词
暗挖地铁隧道
下穿市政道路
地层变形
施工方案
digging underground subway tunnel
underpass municipal roads
formation deformation
construction scheme
