地铁车站暗挖隧道穿越既有线的施工技术研究

Technical Study of a Bored Tunnel Passing Under an Existing Subway Station

广州地铁6号线海珠广场站共有3条隧道穿越地铁2号线车站及区间隧道,两者之间的垂直距离非常小,施工难度极大。文章结合海珠广场站暗挖隧道与既有2号线的位置关系和工程水文地质条件,提出总体施工原则及总体施工方案;详细介绍了左线站台隧道下穿既有2号线和西端左、右线区间隧道下穿既有2号线的施工技术和监测技术。暗挖隧道施工安全顺利穿越了既有2号线,保证了周边建筑物的安全及地铁2号线的正常运营。

Three tunnels of the Guangzhou Metro Line 6 will pass under the Guangzhou Metro Line 2 and the running tunnel at the Haizhu Square Station, which makes construction extremely difficult due to the small verti- cal distance between these structures. In this paper, the overall construction principle and scheme is presented in light of the spatial relationship of the bored tunnels of the Zhuhai Square Station and the existing Guangzhou Metro Line 2 and the engineering hydrogeological conditions. The detailed construction and monitoring techniques for the platform tunnel of the left bore and the running tunnels of both the left and right bores passing under the existing Line 2 are described. Ultimately, the bored tunnels passed through the existing Guangzhou Metro Line 2 safely and smoothly, ensuring the safety of surrounding buildings and normal operation of the Guangzhou Metro Line 2.