detailed introduction
Precast Box Girder Formwork is a kind of beam structure commonly used in bridge engineering. It is hollow inside and has flange on both sides of the upper part. The shape is similar to a box, so it is named. Prefabricated box girder is a flexural member prefabricated by pretension or post-tension method and then transported to the construction site for installation.
The precast box girder is made of concrete and has a box section, which is suitable for bridge design of various spans. It is made of high-strength concrete material, with excellent compressive and load-bearing capacity, suitable for long-span Bridges. The box section makes the precast box girder have higher stiffness, which can effectively control the deformation and deflection of the bridge and improve the stability of the bridge.
The construction process of precast box girder mainly includes the steps of design scheme determination, material preparation, mold making, steel bar processing, concrete mixing and mold pouring. The manufacturing process can be precisely controlled, reducing the variables in the construction process, and the construction site does not need complicated formwork construction and concrete pouring, reducing the difficulty of construction. Therefore, precast box girder has the advantages of simple construction, reducing construction difficulty and shortening construction period.
According to the different materials, precast box beams are mainly divided into prestressed reinforced concrete box beams and steel box beams. Among them, steel box girder, also known as steel box girder, is a common structural form of long-span Bridges, with excellent bearing capacity and stability.
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