城市高架桥现浇箱梁涉地铁施工技术

Construction Technology of Cast-in-situ Box Girder for Urban Viaduct Involving Metro

为满足人民对城市规模和服务水平日益增长的需求,中国作为基建大国,城市建设水平和规模不断提高,城市基础建设日益完善。在城市交通建设中,城市公路跨越地铁隧道的情况越来越多,在施工过程中对既有地铁线路的运营具有较大影响。针对城市公路桥梁上部结构,支架现浇箱梁跨越地铁隧道特别保护区,为满足“地铁隧道上方新增荷载不大于20 kPa”的施工技术进行研究。

In order to meet the people's demand for the growth of city size and service level,the urban construction level and scale are continuously improved,and the urban infrastructure is perfected day by day in China as an infrastructure powerhouse.In the urban traffic construction,there are more and more situations of urban highways crossing metro tunnel,which has a great effect on the operation of the existing metro during the construction.Aiming at the superstructure of urban highway bridge,the bracket cast-in-situ box girder crosses the special protected area of metro tunnel.The construction technology is studied in order to meet that the newly added load above metro tunnel is larger than 20 kPa.