
由中国中铁上海工程局承建的贵阳轨道交通3号线桃花寨站~花溪南站区间,于4月27日顺利下穿西南环线杨柳塘铁路隧道。
盾构下穿前,项目部积极与贵阳市域铁路公司沟通协调,完成了下穿前所需的各项审批手续,组织编制了安全专项施工方案;下穿期间,项目部积极优化掘进参数、合理配置施工资源、强化工序无缝衔接,并应用应力在线监测系统,对隧道安全实施全过程监控,顺利完成了西南环线杨柳塘铁路隧道下穿工作,实现了铁路隧道“零沉降、零变形”。
据悉,贵阳轨道交通3号线一期工程桃~花盾构区间位于贵阳市花溪区,该区间与铁路隧道垂直相交,垂直净距9.9米,穿越段主要地层为中风化白云岩、泥质白云岩,施工难度大,铁路隧道沉降控制要求高,本次盾构的顺利下穿为后续桃花区间贯通奠定了坚实的基础。
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