超浅埋暗挖地铁车站出入口下穿燃气管线群施工控制技术

Construction Control Technology of Exit and Entrance of Ultra-shallow Buried ExcavationSubway Station Passing under Gas Pipeline Group

本文通过对成都地铁17号一期工程温泉大道车站附属B2出入口施工,因交通导改条件限制,无法采用明挖施工工艺,而采用暗挖方式,在超浅埋富水砂卵石地层下穿市政燃气管线群的成功工程实例,介绍本工程在施工过程中通过采取大管棚支护应用、管线悬吊保护措施应用、超浅埋暗挖平拱顶施工控制等措施,有效控制了沉降变形,确保了工程施工和地下管线的安全,为后续类似工程提供借鉴经验。

The construction of B2 entrance and exit affiliated to Hot Spring Avenue Station of Chengdu Metro No.17 Phase I Project is unable to adopt open excavation construction technology due to the limitation of traffic guidance and transformation conditions.The successful engineering example of underground excavation method undercrossing municipal gas pipeline group in ultra-shallow water-rich sandy cobble stratum is introduced.In the construction process of this project,the settlement deformation is effectively controlled by the application of large pipe-shed support,the application of pipeline suspension protection measures,and the construction control of ultra-shallow buried and flat arch.The safety of construction and underground pipelines is ensured,which provides reference for subsequent similar projects.