特大断面地铁暗挖车站斜井转正洞施工关键技术

Key Technologies for the Construction of Transition from Inclined Shaft to Main Tunnel in Subway Underground Excavation Stations

近年来,各大城市正大规模开展地铁建设,为了减小地下交通施工对地面交通的干扰,地铁车站的建设方式逐渐由明挖向暗挖转变。然而,暗挖地铁车站的断面较大,且位于地下,多采用竖井或斜井进入车站,如何安全、快速完成斜井转正洞进入车站主体施工,是施工控制的重点、难点。该文以某地铁暗挖车站为例,就斜井转正洞的传统施工方法进行了阐述,并对传统施工方法存在的缺点进行了分析,在此基础上提出新的施工方法,并对相关施工技术进行了总结。

In recent years,major cities are carrying out large-scale subway construction.To reduce the interference of underground traffic construction on ground traffic,the construction method of subway stations has gradually shifted from open-cut excavation to underground excavation.However,due to the large cross-section of underground subway stations and their location underground,vertical shafts or inclined shafts are often used to access the stations.The key and difficult point of construction control lies in how to safely and quickly complete the transition from inclined shafts to the main tunnel for the main construction of the station.Taking a subway underground excavation station as an example,this article elaborates on the traditional construction method of the transition from inclined shafts to the main tunnel,analyzes the shortcomings of the traditional construction method,proposes a new construction method based on this,and summarizes relevant construction technologies.