车站风道施工对既有桥基变形的影响规律  

Influence of metro airway tunneling on existing pile foundation near subway station

作　　者：毛巨省[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《煤田地质与勘探》2010年第5期38-41,共4页Coal Geology & Exploration

基　　金：教育部科学技术研究重点项目(207119)

摘　　要：以复杂建筑物环境下北京国贸地铁车站风道暗挖施工工程为背景,研究风道施工对既有立交桥梁变形的影响规律,提出可行的施工变形监测方案。研究结果表明,导洞开挖支护施工阶段、风道加固扣拱施工阶段、北风道开挖支护施工阶段是车站风道开挖关键的三大施工阶段。加固扣拱施工阶段对既有桥基的变形影响较大,在此阶段采取加固措施,处理好节点转换问题。在洞桩法施工风道过程中,应采用信息化施工技术,加强桥基、地表和地下风道洞周的变形监测工作,保证风道安全施工。This paper,making Beijing Guo Mao metro station airway construction of shallow tunnel by excavation in complex building environment as engineering background,studies regulations of influence of airway tunneling on existing bridge deformation.Construction deformation feasible monitoring plan is put forward,and its purpose is to provide support for Beijing similar metro station airway tunneling security.The results show that headings tunneling,airway reinforcing and arch,north airway tunnel excavating and supporting are three main construction phases in station airway tunneling process.The deformation influence in phase of airway reinforcing and arch is more serious than that of the other two phases.Thus,it is necessary to take reinforcing measures and deal with point transformation in this phase.In the process of airway tunneling construction with Drift-Pile-Arch（Drift-PBA）,it should take informationized construction technique and strengthen monitoring of deformation of bridge pile foundation and ground surrounding underground airway to ensure safe airway tunneling.

关 键 词：车站风道 监测 洞桩法施工 既有桥梁 沉降规律 

分 类 号：P642[天文地球—工程地质学] TU4[天文地球—地质矿产勘探]