拟建地铁线路穿越既有地铁车站施工控制要点研究

Study on Control Points for Construction of Subway Line Crossing Existing Subway Stations

随着地铁线路的发展,拟建地铁线路下穿既有地铁车站的情况不可避免。利用矿山法下穿施工时,随着地层变形的传递,会导致既有车站结构的变形。因此,如何保证既有车站的安全和正常使用,是施工过程中的重难点问题。为此,以福州地铁4号线城门站下穿1号线既有车站的工程项目为背景,采用三维数值模拟,分析拟建线路施工对既有地铁车站结构的影响和施工技术要点。

With the development of subway lines,it is inevitable that new subway lines will cross existing subway stations.During the construction of the subway line using the mine tunnel method,the deformation of the ground will be transmitted and may cause deformation of the existing station structure.Therefore,ensuring the safety and normal use of existing subway stations is a critical issue during the construction process.In this study,taking the construction project of the underpass of the Chengmen Station of Fuzhou Metro Line 4 under the existing Line 1 as the background,a threedimensional numerical simulation was used to analyze the impact of the construction of the new line on the existing subway station structure and the key construction techniques.