All-welded box girder combination section constructing method

A construction method and all-welding technology, applied in construction, bridge construction, erection/assembly of bridges, etc., can solve the problems of not being able to meet the construction period of Hutong Railway, increasing the risk of construction process, and large span of main span, etc. The effect of maintenance workload, shortened installation period and improved durability

Active Publication Date: 2014-09-03
CHINA MAJOR BRIDGE ENERGINEERING +1
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Problems solved by technology

The main span of the bridge is super long, the main girder is super long, and the conventional installation technology is adopted. On the one hand, it cannot meet the needs of the construction period of the Shanghai-Tongtong Railway; on the other hand, it also greatly increases the risk of the construction process.

Method used

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  • All-welded box girder combination section constructing method
  • All-welded box girder combination section constructing method
  • All-welded box girder combination section constructing method

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Embodiment Construction

[0018] refer to figure 1 , figure 2 , the concrete construction steps of the present invention are as follows:

[0019] 1) According to the sequence of installation, the main girder is divided according to the length between two sections as a new type of box-truss composite section,

[0020] 2) Fabrication of new box truss composite segments:

[0021] ①Make plate unit: make the plate unit of each unit unit that composes the box truss composite segment, the plate unit includes the main truss lower chord, the main truss upper chord, the upper bridge deck, the lower bridge deck steel box, the main truss vertical bar, and the oblique bar And the horizontal connecting plate unit;

[0022] ② Welding of combined segment unit elements: welding the lower chord 1 of the main truss and the steel box 2 of the lower deck, welding the upper chord 6 of the main truss and the deck 7 of the upper deck, welding the transverse connecting system 3 and the vertical bar 4 of the main truss, and...

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Abstract

The invention relates to an all-welded box girder combination section constructing method. The method comprises the specific steps that a girder is divided by making the distance length of two sections serve as one novel box girder combination section, plate units of sectional unit parts are manufactured, a girder lower chord is welded to a lower bridge surface steel box, a girder upper chord is welded to an upper bridge surface panel, a transverse bracing system is welded to a girder vertical rod, the girder vertical rod and an inclined rod are welded to the girder lower chord and the girder upper chord, and the novel box girder combination sections are formed; trial splicing is performed on adjacent novel box girder combination sections on a preset trial assembly platform, and anticorrosion coating is performed on the outer surface. All-welded box girder combinations are welded in place according to a construction order on a bridging construction site. According to the method, the girder is designed into the all-welded box girder combination sections, few hanging units are used, durability of the girder is improved, maintaining workloads during the later period are reduced, site construction is simplified, work efficiency is improved, and an installation period is shortened; the appearance is beautiful, and durability is good. The method has been successfully applied to the Shanghai-to-Nantong railway Yangtze river highway-railway dual-purpose great bridge engineering.

Description

technical field [0001] The invention relates to a construction method of an all-welded box truss composite segment. Background technique [0002] For existing steel truss cable-stayed bridges, the main truss construction methods mainly include loose assembly, truss erection, and single-section overall erection. These construction methods use a large number of high-strength bolts to connect the site, and the main truss and the bridge deck also use a large number of welds to connect on site. With the increase of the span, the number of main truss members and bridge deck units increases dramatically, and the workload of on-site splicing is huge. [0003] The Yangtze River Bridge on the Shanghai-Nongtong Railway is located in the coastal area, and severe weather conditions occur from time to time. The Shanghai-Tongjiang Yangtze River Bridge is a major node project on the Shanghai-Tongtong Railway Project. The main bridge is a super-long-span cable-stayed bridge for both highwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 高宗余张敏徐伟肖海珠张燕飞彭振华郑清刚徐力张建强罗扣何东升苑仁安侯健刘厚军
Owner CHINA MAJOR BRIDGE ENERGINEERING
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