A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Large-span deck type continuous steel truss cantilever erection construction method
The invention provides a large-span deck type continuous steel truss cantilever erection construction method which comprises the following steps: constructing a pier abutment at the lower part of a bridge, and erecting a steel bracket and an assembling platform at the inner side of a side pier; erecting steel trusses oppositely from the side piers at two ends to the midspan; erecting an auxiliarytemporary pier, and continuously erecting the steel truss girder to a secondary side pier by using the auxiliary temporary pier as a support; symmetrically arranging adjusting devices on two sides ofthe top end of the secondary side pier, and placing the steel truss girder on the adjusting devices; after continuously erecting steel trussed beams between two sections to the midspan opposite cantilevers, jacking the side span bridge through a jacking device on the secondary side pier, and arranging a sliding support between the side pier and a lower chord of the bridge; and building an ultrahigh temporary pier and using the ultrahigh temporary pier as a support, carrying out subsequent internode installation until the main pier, and finally closing the closure. The adjusting devices are arranged at the top ends of all the piers, so that the steel truss girder is jacked up and corrected to offset downwarping values generated in the process of erecting the steel girder cantilever, and accurate pier-loading and accurate closure of the steel truss girder are realized.
本发明提供一种大跨度上承式连续钢桁梁悬臂架设施工方法，包括：施工桥梁下部墩台，在边墩内侧搭设钢支架和拼装平台；从两端的边墩处开始向跨中相向架设钢桁梁；架设辅助临时墩，利用辅助临时墩作为支撑继续悬臂架设钢桁梁至次边墩；在次边墩的顶端两侧对称布置调整装置，将钢桁梁置于调整装置上；继续向跨中相向悬臂架设两个节间的钢桁梁后，通过次边墩上的顶升装置对边跨桥梁进行顶升，在位于边墩与桥梁下弦杆之间设置滑动支座；搭建超高临时墩并利用其作为支撑，进行后续节间的安装直至主墩，最后合龙。本发明在所有桥墩的顶端布置调整装置，实现对钢桁梁顶升和纠偏，以抵消钢梁悬臂架设过程中产生的下挠值，实现钢桁梁的准确上墩、精确合龙。
Large-span deck type continuous steel truss cantilever erection construction method
The invention provides a large-span deck type continuous steel truss cantilever erection construction method which comprises the following steps: constructing a pier abutment at the lower part of a bridge, and erecting a steel bracket and an assembling platform at the inner side of a side pier; erecting steel trusses oppositely from the side piers at two ends to the midspan; erecting an auxiliarytemporary pier, and continuously erecting the steel truss girder to a secondary side pier by using the auxiliary temporary pier as a support; symmetrically arranging adjusting devices on two sides ofthe top end of the secondary side pier, and placing the steel truss girder on the adjusting devices; after continuously erecting steel trussed beams between two sections to the midspan opposite cantilevers, jacking the side span bridge through a jacking device on the secondary side pier, and arranging a sliding support between the side pier and a lower chord of the bridge; and building an ultrahigh temporary pier and using the ultrahigh temporary pier as a support, carrying out subsequent internode installation until the main pier, and finally closing the closure. The adjusting devices are arranged at the top ends of all the piers, so that the steel truss girder is jacked up and corrected to offset downwarping values generated in the process of erecting the steel girder cantilever, and accurate pier-loading and accurate closure of the steel truss girder are realized.
本发明提供一种大跨度上承式连续钢桁梁悬臂架设施工方法，包括：施工桥梁下部墩台，在边墩内侧搭设钢支架和拼装平台；从两端的边墩处开始向跨中相向架设钢桁梁；架设辅助临时墩，利用辅助临时墩作为支撑继续悬臂架设钢桁梁至次边墩；在次边墩的顶端两侧对称布置调整装置，将钢桁梁置于调整装置上；继续向跨中相向悬臂架设两个节间的钢桁梁后，通过次边墩上的顶升装置对边跨桥梁进行顶升，在位于边墩与桥梁下弦杆之间设置滑动支座；搭建超高临时墩并利用其作为支撑，进行后续节间的安装直至主墩，最后合龙。本发明在所有桥墩的顶端布置调整装置，实现对钢桁梁顶升和纠偏，以抵消钢梁悬臂架设过程中产生的下挠值，实现钢桁梁的准确上墩、精确合龙。
Large-span deck type continuous steel truss cantilever erection construction method
一种大跨度上承式连续钢桁梁悬臂架设施工方法
WANG QINGHE (author) / ZHOU XINYA (author) / FANG JI (author) / CAO HAN (author) / DING SHIHONG (author) / WANG BINGYAN (author) / XIE LU (author) / JIANG ZHI (author) / ZHANG WEI (author) / DING HE (author)
2020-05-12
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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