软土地区深基坑开挖对邻近轨道交通区间隧道的影响分析

Analysis of Impact of Deep Excavation in Soft Soil Areas on Adjacent Rail Transit Tunnels

在软土地区,轨道交通区间隧道作为城市地下交通的大动脉,其安全极为重要。如何有效预测和控制区间隧道在外界施工扰动下的结构变形,已成为工程研究领域的重难点之一。结合某深基坑开挖的工程案例,详述了该项目的特点和难点以及相对应的技术措施,分析了施工过程中邻近轨道交通区间隧道的变形规律,揭示了近距离深基坑开挖施工对区间隧道的作用机理。研究结果表明,基坑开挖施工对邻近轨道交通区间隧道的变形有显著影响,其影响程度与基坑开挖深度和两者水平距离具有一定关系。研究成果对今后类似工程具有一定的指导意义。

In soft soil areas,the safety of rail transit tunnels as the main arteries of urban underground transportation is very important.How to effectively predict and control the structural deformation of rail transit tunnels under external construction disturbances has become one of the key challenges in the field of engineering research.The characteristics and difficulties of a deep excavation project are introduced in detail,along with corresponding technical measures.The deformation patterns of the adjacent rail transit tunnel during the deep excavation process are analyzed,revealing the effect mechanism of close-distance deep excavation on the rail transit tunnel.The results indicate that the excavation significantly impacts the deformation of the adjacent rail transit tunnel,with the extent of influence related to the depth of the excavation and the horizontal distance between them.The findings will guide similar projects in the future.