明挖隧道与地铁交叉段盾构隧道抗浮加固技术  

The Anti-floating Reinforcement Technology for Shield Tunnels at the Intersection with Open-cut Tunnels and Subway

作　　者：吕晓坤 LüXiaokun

机构地区：[1]浙江交工集团股份有限公司

出　　处：《城市建筑》2024年第17期223-225,共3页Urbanism and Architecture

基　　金：浙江省自然科学基金项目(LQ20E080022)。

摘　　要：城市轨道交通常常面临着新建线路穿越既有线的情况,新建隧道的施工将会对既有地铁的安全运营产生不利的影响,如何确保既有地铁隧道的安全是施工控制的关键。文章采用基坑分坑间隔开挖、预留土体,在基坑底部设置支架承载水袋压重,利用扁壳体结构进行土体压重等方法,形成了盾构隧道复合式抗浮体系,实现了对既有地铁盾构隧道上浮的有效控制,确保了施工安全,可为类似工程提供参考和借鉴。The urban rail transportation frequently encounters scenarios where new lines pass through the existing ones.The construction of new tunnels can adversely affect the safe operation of the existing subway.Safeguarding the safety of the existing subway tunnels is a critical concern in construction management.To address this issue,a range of techniques have been implemented,including excavating separate sections of the foundation pit with intervals,leaving a reservation of soil,installing supports at the pit bottom to bear the weight of water bags,and utilizing flat shell structures for soil compaction.These methods have collectively established a comprehensive anti-floating system for the shield tunnels,which not only effectively mitigates the risk of uplift in the existing subway’s shielded tunnels,but also ensures the construction safety.It provides a reference for similar engineering projects.

关 键 词：交叉段 明挖隧道 盾构隧道 抗浮加固 

分 类 号：TU745[建筑科学—建筑技术科学] U231.3[交通运输工程—道路与铁道工程]