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Movable formwork construction method

1. Overview

  • Large movable formwork construction is a method which involves combining steel girders and formwork and mechanizing the movement of the steel girders and formwork assembly/disassembly to construct one span after another.

  • The general cross-sectional shapes of main girders constructed using movable formwork include hollow slab bridges, slab girder bridges and box-girder bridges, and the shape of the main girder cross-section is primarily determined by the span it will be used for. This method is commonly used for continuous girder bridges; however, it is also used for rigid frame bridges and multi-span simple girder bridges used in railway bridges.

View of large movable formwork construction (Kyotanabe Viaduct)


1. Form setting


2. Rebar assembled


3. Concrete pouring


4. Tension application


5. Form release


6. Moving



2. Key Features

  • Because the space under the body of the bridge during construction can be secured, this allows construction to be carried out without having to be concerned about the conditions under the girder.

  • Since the construction area is covered, construction can be carried out without concern for wind, rain or other weather conditions, making process management easier.

  • Because the same operations are repeated, workers quickly become proficient, while mechanization helps to save labor and to speed up construction.



3. Our Construction

  • Shin-Meishin Expressway Kyotanabe Viaduct (PC superstructure work) construction

  • Kyushu Shinkansen No. 2 Underpass Bv Outer 3Cp frame construction

  • No. 2 Meishin Expressway Karishuku Viaduct


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