Prefabricated steel pipe-steel web-prestressed concrete composite box girder and construction technology
A steel plate concrete and prefabricated concrete slab technology, applied in bridges, bridge materials, bridge construction, etc., can solve the problems of heavy installation weight of single-piece box girder, complicated prefabrication construction, and high construction cost, achieve superior compressive performance, improve resistance to The effect of shearing ability and improving crack resistance
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Embodiment 1
[0052] In this embodiment, the prefabricated steel pipe-steel web-prestressed concrete composite box girder is I-shaped, the steel pipe 2 is a round steel pipe, and the connecting piece is a stud 10 .
[0053] Such as Figure 1 to Figure 12 As shown, the prefabricated steel pipe-steel web-prestressed concrete composite box girder is an I-type composite box girder, comprising a steel pipe 2 filled with concrete, the top of the steel pipe 2 is provided with a prefabricated concrete slab 1, and the steel pipe 2 is filled with concrete. 2 A number of shear connectors 8 welded at the top correspond to a number of reserved holes 13 on the precast concrete slab 1 and are fixed by high-strength bonding mortar 9. The bottom end of the steel pipe 2 is welded to one end of the steel web 3, and the steel web 3 The other end is welded to the lower flange steel plate 4, and the connecting piece is evenly welded on the wide surface of the steel web 3 and the lower flange steel plate 4, and t...
Embodiment 2
[0060] The difference between this embodiment and embodiment 1 is that the steel pipe 2 adopts a square steel pipe, such as Figure 13 to Figure 15 shown.
Embodiment 3
[0062] The difference between this embodiment and Embodiment 1 is that the connector is a steel strip 1001 with holes, such as Figure 16 and Figure 17 shown.
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