Incremental launching construction method for large-span steel box girder spanning constructed road
A technology of jacking construction and steel box girders, which is applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc. It can solve the problems of less construction materials, less vertical support, and inability to meet the requirements of jacking, and achieve convenient construction and demolition. Easy installation, safe and reliable construction process
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[0073] Such as figure 1 Shown is a long-span steel box girder jacking construction method that crosses an existing road. The steel box girder 1 to be pushed is a steel box girder that spans an existing road 2. The steel box girder 1 to be pushed passes through five permanent The buttresses are supported by multiple steel box girder segments spliced from the rear to the front; for example figure 2 As shown, the five permanent piers are respectively the first piers 3, the second piers 4, the third piers 5, and the fourth piers 6 along the length direction of the pushed steel box girder 1 from the rear to the front. and the fifth pier 7, the five permanent piers are double column piers without cap; the first pier 3 and the second pier 4 are located on the left side of the existing road 2, and the fourth pier 6 and the fifth pier 7 are located on the right side of the existing road 2, and the third pier 5 is located in the middle of the existing road 2; It consists of two cyl...
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