摘要
在城市立交桥改造和扩能提升项目中,常常出现新建桥梁跨越既有桥梁现象,目前多采用型钢或贝雷架搭设门型支架跨越既有桥梁施工,但这些支架结构复杂,施工难度大,成本高。为此,以某城市立交桥改造项目为例,对新建桥梁上跨既有桥梁时采用的满堂式支撑架设计和施工进行了分析和探讨,可为以后同类情况的现浇箱梁支架设计提供参考和指导。
In the reconstruction and expansion of urban overpass projects,new bridges often have to span existing bridges.At present,the profile steel or Beret supporting frames are frequently adopted to erect portaltype supporting-frame for spanning existing bridge construction.However,these supporting-frames are complex in structure,difficult and costly for construction.To this end,taking one urban overpass reconstruction project as an example,the design and construction of full-hall supporting-frame used in the construction of new bridges spanning existing bridges are analyzed and discussed,which can provide reference and guidance for the supporting frame design of similar cast-in-place box girder in the future.
作者
郑鹏
陈华
陈添
刘海亮
唐达
ZHENG Peng;CHEN Hua;CHEN Tian;LIU Hailiang;TANG Da(China Construction Eighth Engineering Division Corp., Ltd. Southwest Branch, Chengdu, Sichuan 610041, China)
出处
《建筑施工》
2018年第11期1973-1975,共3页
Building Construction
关键词
城市立交桥建设
现浇箱梁
既有桥梁
满堂支撑架
受力验算
urban overpass construction
cast-in-place box girder
existing bridge
full-hall supporting-frame
stress check calculation
