富水砂卵石地层盾构近距离穿越建(构)筑物施工技术分析

Analysis of Construction Technology of Shield Passing Through Buildings at Short Distance in Water-Rich Sandy Pebble Stratum

城市轨道交通是现代大城市交通的发展方向,也是解决大城市病,建设绿色城市、智慧城市的有效途径。然而地铁建设多位于城市建成区,现场条件复杂,常受建筑、管线、场地制约,线路经常要穿越江河湖海,上跨下穿建(构)筑物等。盾构穿越既有建(构)筑物时,若缺乏有效的管理和措施,可能会引发基础沉降或变形,影响使用安全。论文结合具体工程案例,就盾构近距离穿越既有线施工技术进行了分析,望能为同类工程提供参考。

Urban rail transit is the development direction of transportation in modern big cities,and it is also an effective way to solve the problems in big cities and build green and smart cities.However,subway construction is mostly located in urban built-up areas,and the site conditions are complex,which is often restricted by buildings,pipelines and sites.Lines often cross rivers,lakes and seas,and cross buildings(structures)up and down.When shield passes through existing buildings,if there is no effective management and measures,it may cause foundation settlement or deformation,which will affect the use safety.Combined with specific engineering cases,this paper analyzes the construction technology of shield passing through existing lines at short distance,hoping to provide reference for similar projects.