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A platform for research: civil engineering, architecture and urbanism
Construction method for mid-span closure section of large-span cable-stayed bridge
The invention discloses a construction method for a mid-span closure section of a large-span cable-stayed bridge, which comprises the following steps of: 1, embedding an embedded part at the end part of the last section of cantilever pouring section of large and small mileages before concrete pouring of the last section of box girder cantilever section of the large and small mileages before mid-span closure; secondly, a mid-span closure section formwork is installed; 3, a pushing device is installed, the pushing device comprises pushing jacks with the same number as the pushing support embedded parts, and each pushing jack is provided with a pushing rod piece; fourthly, jacking force is applied; 5, locking the stiff skeleton; 6, the following steps are conducted in sequence: mounting of a bottom die, positioning of a prestressed pipeline in a bottom plate, mounting of an inner die, binding of top plate reinforcing steel bars of a midspan closure section and positioning of the prestressed pipeline in a top plate; and 7, the temporary closure beam prestressed steel beam is tensioned firstly, and then water in the counterweight water bag is discharged in the process of pouring the concrete of the mid-span closure section. The method has the characteristics of simplicity in operation and small external influence.
本发明公开了一种用于大跨径斜拉桥中跨合龙段的施工方法，包括：流程一，在中跨合拢前大、小里程最后一节箱梁悬臂段的混凝土浇筑前，在大、小里程最后一节悬臂浇筑段的端部埋设预埋件；流程二，安装中跨合龙段模板；流程三，安装顶推装置，顶推装置包括与顶推支架预埋件数量相同的顶推千斤顶，每个顶推千斤顶上均安装顶推杆件；流程四，施加顶推力；流程五，劲性骨架锁定；流程六，依次进行以下步骤：底模安装、底板内的预应力管道定位、安装内模、绑扎中跨合龙段的顶板钢筋、顶板内的预应力管道定位；流程七，先张拉临时合龙束预应力钢束，再在浇筑中跨合龙段的混凝土的过程中同时排放配重水袋内的水。本发明具有操作简单，受外界影响小的特点。
Construction method for mid-span closure section of large-span cable-stayed bridge
The invention discloses a construction method for a mid-span closure section of a large-span cable-stayed bridge, which comprises the following steps of: 1, embedding an embedded part at the end part of the last section of cantilever pouring section of large and small mileages before concrete pouring of the last section of box girder cantilever section of the large and small mileages before mid-span closure; secondly, a mid-span closure section formwork is installed; 3, a pushing device is installed, the pushing device comprises pushing jacks with the same number as the pushing support embedded parts, and each pushing jack is provided with a pushing rod piece; fourthly, jacking force is applied; 5, locking the stiff skeleton; 6, the following steps are conducted in sequence: mounting of a bottom die, positioning of a prestressed pipeline in a bottom plate, mounting of an inner die, binding of top plate reinforcing steel bars of a midspan closure section and positioning of the prestressed pipeline in a top plate; and 7, the temporary closure beam prestressed steel beam is tensioned firstly, and then water in the counterweight water bag is discharged in the process of pouring the concrete of the mid-span closure section. The method has the characteristics of simplicity in operation and small external influence.
本发明公开了一种用于大跨径斜拉桥中跨合龙段的施工方法，包括：流程一，在中跨合拢前大、小里程最后一节箱梁悬臂段的混凝土浇筑前，在大、小里程最后一节悬臂浇筑段的端部埋设预埋件；流程二，安装中跨合龙段模板；流程三，安装顶推装置，顶推装置包括与顶推支架预埋件数量相同的顶推千斤顶，每个顶推千斤顶上均安装顶推杆件；流程四，施加顶推力；流程五，劲性骨架锁定；流程六，依次进行以下步骤：底模安装、底板内的预应力管道定位、安装内模、绑扎中跨合龙段的顶板钢筋、顶板内的预应力管道定位；流程七，先张拉临时合龙束预应力钢束，再在浇筑中跨合龙段的混凝土的过程中同时排放配重水袋内的水。本发明具有操作简单，受外界影响小的特点。
Construction method for mid-span closure section of large-span cable-stayed bridge
一种用于大跨径斜拉桥中跨合龙段的施工方法
YUAN WEIMING (author) / LI YANG (author) / CHEN SHAOCHUAN (author) / LI YIFAN (author) / LIN XIAO (author) / HUANG JIANYANG (author) / WU ZHAOFENG (author) / HAN YU (author)
2023-04-14
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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