改进型双侧壁导坑法在复杂城区环境下超浅埋暗挖地铁车站的应用研究  

Research on the Application of Improved Double-sidewall Diversion Method in Ultra-shallow Underground Excavation of Subway Station under Complex Urban Environment

作　　者：王祥 WANG Xiang(Guiyang Urban Rail Transit Group Co.,Ltd.,Guiyang 550081,China)

机构地区：[1]贵阳市公共交通投资运营集团有限公司,贵阳550081

出　　处：《价值工程》2022年第24期116-120,共5页Value Engineering

摘　　要：山地城市复杂环境条件下,超浅埋暗挖地铁车站施工面临着对周边环境影响和自身施工安全的双重风险,贵阳轨道交通3号线一期工程黔灵山公园站采用暗挖工法施工中,通过改进双侧壁导坑法的工序,大为降低受力体系转换风险,有限元数值模拟也表明其对控制开挖引起的拱顶及地面沉降效果显著。施工现场监测数据显示,改进型的双侧壁导坑法应用于浅埋大跨度暗挖车站中,对控制沉降变形,降低工程风险,保障路面行车及管线安全等方面作用明显,实践应用取得了较好效果,可供类似工程参考借鉴。Under the complex environment of mountain city,the construction of ultra-shallow buried underground excavation subway station is faced with the double risks of environmental impact and self-construction safety.In the construction of Qianlingshan Park Station in the first phase of the Guiyang Urban Rail Transit Line 3,the risk of force system transformation is greatly reduced by improving the working procedure of the double-sidewall pilot pit method.The finite element numerical simulation also shows that it has remarkable effect on the settlement of vault and ground caused by controlled excavation.The monitoring data of construction site show that the improved double-side-wall pilot pit method applied in shallow-buried and large-span underground excavation station has obvious effect on controlling settlement deformation,reducing engineering risk,ensuring road traffic safety and pipeline safety,etc.Good results have been achieved in practice,which can be used for reference for similar projects.

关 键 词：地铁车站 改进型双侧壁导坑法 数值模拟 工程监测 

分 类 号：U231.3[交通运输工程—道路与铁道工程]