A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of girder of steel box girder cable-stayed bridge
The invention provides a construction method of a main beam of a steel box beam cable-stayed bridge. The construction method comprises the steps that A, nth to third beam sections of a side span are sequentially positioned and welded section by section; then, positioning and welding a first side span beam section; positioning and welding a second beam section of the rearmost side span; b, temporary connection between the two beam sections at the bridge pier is removed, and the beam section away from the midspan is installed on a support of the bridge pier; c, a beam section S0 is constructed, then the beam section S0 is temporarily and fixedly connected to the cable bent tower, and the crane moves forwards till the crane front fulcrum is located on the steel beam S0; and D, the first beam section to the nth beam section of the midspan are constructed, and in the construction process of each beam section, the stay cables corresponding to the main span side and the side span side are tensioned synchronously. According to the method, the steel box girder is spliced through the single cantilever from the side span to the middle span, a single-side crane is adopted for construction, the side span walks to the middle span for construction, the balance weight trolleys are symmetrically arranged at the side span, the problems that construction condition limitation cannot be achieved, and the construction period is affected are solved, and meanwhile structural safety is guaranteed.
本发明提出了一种钢箱梁斜拉桥主梁的施工方法，包括步骤A、边跨第n～3号梁段先后逐段定位、焊接；之后，边跨第1号梁段定位、焊接；最后边跨第2号梁段定位、焊接；步骤B：拆除桥墩处两段梁段之间的临时连接，并将远离中跨的梁段安装于桥墩的支座上；步骤C、施工梁段S0，之后将其临时固结于索塔，吊机向前移动至吊机前支点位于钢梁S0；步骤D、中跨第1～n号梁段施工，每段梁段施工过程中，主跨侧及边跨侧对应的斜拉索同步张拉。本发明采用从边跨到中跨悬拼的单悬臂拼装钢箱梁的方法，施工采用单侧吊机，从边跨行走至中跨施工，在边跨部位对称设置了配重小车，解决了建设条件限制无法实现、影响工期的问题，同时保证了结构安全性。
Construction method of girder of steel box girder cable-stayed bridge
The invention provides a construction method of a main beam of a steel box beam cable-stayed bridge. The construction method comprises the steps that A, nth to third beam sections of a side span are sequentially positioned and welded section by section; then, positioning and welding a first side span beam section; positioning and welding a second beam section of the rearmost side span; b, temporary connection between the two beam sections at the bridge pier is removed, and the beam section away from the midspan is installed on a support of the bridge pier; c, a beam section S0 is constructed, then the beam section S0 is temporarily and fixedly connected to the cable bent tower, and the crane moves forwards till the crane front fulcrum is located on the steel beam S0; and D, the first beam section to the nth beam section of the midspan are constructed, and in the construction process of each beam section, the stay cables corresponding to the main span side and the side span side are tensioned synchronously. According to the method, the steel box girder is spliced through the single cantilever from the side span to the middle span, a single-side crane is adopted for construction, the side span walks to the middle span for construction, the balance weight trolleys are symmetrically arranged at the side span, the problems that construction condition limitation cannot be achieved, and the construction period is affected are solved, and meanwhile structural safety is guaranteed.
本发明提出了一种钢箱梁斜拉桥主梁的施工方法，包括步骤A、边跨第n～3号梁段先后逐段定位、焊接；之后，边跨第1号梁段定位、焊接；最后边跨第2号梁段定位、焊接；步骤B：拆除桥墩处两段梁段之间的临时连接，并将远离中跨的梁段安装于桥墩的支座上；步骤C、施工梁段S0，之后将其临时固结于索塔，吊机向前移动至吊机前支点位于钢梁S0；步骤D、中跨第1～n号梁段施工，每段梁段施工过程中，主跨侧及边跨侧对应的斜拉索同步张拉。本发明采用从边跨到中跨悬拼的单悬臂拼装钢箱梁的方法，施工采用单侧吊机，从边跨行走至中跨施工，在边跨部位对称设置了配重小车，解决了建设条件限制无法实现、影响工期的问题，同时保证了结构安全性。
Construction method of girder of steel box girder cable-stayed bridge
钢箱梁斜拉桥主梁的施工方法
LIAO CHENFENG (author) / HUANG DEGENG (author) / SHANG CONGJIN (author) / TAN HAIHUI (author) / LIU MENGLIN (author)
2023-08-11
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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