地铁暗挖隧道穿越南水北调管廊施工技术

Undercutting Construction Technology of Subway Tunnel across South-to-North Water Diversion Pipe Gallery

地铁14号线郭庄子站～大井站竖井区间暗挖隧道下穿南水北调管廊,隧道施工中如何确保南水北调管廊的运营安全,确保地铁隧道施工以及后期地铁运营的安全,是施工中的重点和难题。结合隧道穿越南水北调管廊施工实例,介绍了深孔注浆加固和台阶法环向预留核心土开挖施工取得的成功经验,供同类工程参考。

Subway Line 14 Guozhuangzi Station to Dajing station interval shafts interval excavation tunneling under pipe gallery of the South-to-North water diversion. Therefore, how to ensure the operational safety of the North Water Pipe Gallery in tunnel construction and the safety of the subway tunnel construction as well as the late subway operation is the focus and one of the problems in construction. Combined with the South-to-North tube gallery construction, the paper describes the successful experience like the grouting reinforcement of deep hole and step method to set aside core soil to provide con- struction reference for similar projects.