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Construction method for folding steel box girder overcrossing existing steel girder
The invention discloses a construction method of a closure section steel box girder overcrossing an existing bridge. A pedestal and a vertical jack are installed on the top face of the cantilever endof a side span steel box girder crossing the two sides of the existing bridge, a lifting lug and a counter-force seat are welded to the top faces of the two sides of the closure section steel box girder, and the closure section steel box girder is hoisted to the pedestal through hoisting equipment till the vertical jack abuts against a hanging bracket; a longitudinal jack is installed by using thecounter-force seat welded on the closure section steel box girder in advance to prop against the pedestal; the vertical jack on one side of the side span steel box girder jacks the hanging bracket toadjust the vertical displacement of the closure section steel box girder, the longitudinal jack jacks the pedestal to adjust the longitudinal displacement, and the closure section steel box girder isadjusted till adjustment is completed; and the closure section steel box girder and the adjacent section side span steel box girder are welded to complete system conversion, and finally the verticaljack, the longitudinal jack, the hanging bracket, the counter-force seat and the pedestal are disassembled. The construction method has the following advantages: a construction assistive device is simple in structure and high in positioning precision, and the construction progress is effectively accelerated.
本发明公开了一种上跨既有桥梁的合拢段钢箱梁的施工方法，它是在跨既有桥梁两侧的边跨钢箱梁悬臂端的顶面安装垫座和竖向千斤顶，在合拢段钢箱梁两侧的顶面焊接吊耳和反力座，利用吊装设备将合拢段钢箱梁吊装至垫座处，直至竖向千斤顶顶住吊架；利用提前在合拢段钢箱梁上焊接的反力座，安装纵向千斤顶，顶住垫座；通过边跨钢箱梁一侧的竖向千斤顶顶升吊架调整合拢段钢箱梁的竖向位移，纵向千斤顶顶推垫座调整纵向位移，对合拢段钢箱梁进行调节，直至调整完毕。对合拢段钢箱梁与相邻段的边跨钢箱梁进行焊接，完成体系转换，最后拆除竖向千斤顶、纵向千斤顶、吊架、反力座、垫座。本发明的优点是：施工辅助器具结构简单，定位精度高，有效加快施工进度。
Construction method for folding steel box girder overcrossing existing steel girder
The invention discloses a construction method of a closure section steel box girder overcrossing an existing bridge. A pedestal and a vertical jack are installed on the top face of the cantilever endof a side span steel box girder crossing the two sides of the existing bridge, a lifting lug and a counter-force seat are welded to the top faces of the two sides of the closure section steel box girder, and the closure section steel box girder is hoisted to the pedestal through hoisting equipment till the vertical jack abuts against a hanging bracket; a longitudinal jack is installed by using thecounter-force seat welded on the closure section steel box girder in advance to prop against the pedestal; the vertical jack on one side of the side span steel box girder jacks the hanging bracket toadjust the vertical displacement of the closure section steel box girder, the longitudinal jack jacks the pedestal to adjust the longitudinal displacement, and the closure section steel box girder isadjusted till adjustment is completed; and the closure section steel box girder and the adjacent section side span steel box girder are welded to complete system conversion, and finally the verticaljack, the longitudinal jack, the hanging bracket, the counter-force seat and the pedestal are disassembled. The construction method has the following advantages: a construction assistive device is simple in structure and high in positioning precision, and the construction progress is effectively accelerated.
本发明公开了一种上跨既有桥梁的合拢段钢箱梁的施工方法，它是在跨既有桥梁两侧的边跨钢箱梁悬臂端的顶面安装垫座和竖向千斤顶，在合拢段钢箱梁两侧的顶面焊接吊耳和反力座，利用吊装设备将合拢段钢箱梁吊装至垫座处，直至竖向千斤顶顶住吊架；利用提前在合拢段钢箱梁上焊接的反力座，安装纵向千斤顶，顶住垫座；通过边跨钢箱梁一侧的竖向千斤顶顶升吊架调整合拢段钢箱梁的竖向位移，纵向千斤顶顶推垫座调整纵向位移，对合拢段钢箱梁进行调节，直至调整完毕。对合拢段钢箱梁与相邻段的边跨钢箱梁进行焊接，完成体系转换，最后拆除竖向千斤顶、纵向千斤顶、吊架、反力座、垫座。本发明的优点是：施工辅助器具结构简单，定位精度高，有效加快施工进度。
Construction method for folding steel box girder overcrossing existing steel girder
一种上跨既有钢梁的钢箱梁合拢的施工方法
LI JIANG (author) / WANG XIAOMIN (author) / SUN FENGXIANG (author) / YE SHAOQI (author) / LYU XINYANG (author) / LI LEI (author) / LIU JING (author)
2020-07-24
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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