Connecting method of prefabricated box girder and transition layer and prefabricated box girder structure

Abstract

The invention relates to a method for connecting a prefabricated box girder and a transition layer. The method comprises the following steps: (1) binding box girder main body steel bars; (2) after binding of the box girder main body reinforcing steel bars is completed, arranging a plurality of hook reinforcing steel bars at the tops of the box girder main body reinforcing steel bars, and the tops of the hook reinforcing steel bars penetrate through the box girder top plate and extend into the transition layer; and (3) installing a formwork, pouring concrete, and after pouring is completed and initial setting is conducted, roughening the mortar building surface so as to increase the friction force between the mortar building surface and the transition layer. According to the method, galling treatment is conducted on the surface of the box girder top plate, meanwhile, the hook steel bars are arranged at the tops of the box girder body steel bars, the tops of the hook steel bars penetrate through the box girder top plate and penetrate into the transition layer, the friction force between the box girder top plate and the transition layer is increased, the shear strength of the transition layer is enhanced, and the requirement that heavy-duty vehicles run on the surface layer of the transition layer can be met. The use durability of the pavement structure layer is improved. In addition, the invention further provides a prefabricated box girder structure.

Description

technical field [0001] The invention relates to the field of bridge engineering construction, in particular to a connection method between a prefabricated box girder and a transition layer and a prefabricated box girder structure. Background technique [0002] Prefabricated box girder is the most common structural form in bridge construction. It is widely designed and applied due to its controllable prefabricated quality and high installation efficiency. Generally, there are transitional layers and pavement structures on the top of the prefabricated box girder: [0003] Among them, in order to make a good connection between the top surface of the prefabricated box girder and the transition layer, the general method is to roughen the top surface of the box girder. Although this greatly improves the friction between the two, it does not affect the braking effect of heavy loads. Lowering the shear stress will easily cause cracks between the two, so it is necessary to optimize t...

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Problems solved by technology

[0003] Among them, in order to make a good connection between the top surface of the prefabricated box girder and the transition layer, the general method is to roughen the top surface of the box girder. Although this greatly improves the friction between the two, it does not affect the braking effect of heavy loads. Lowering the shear stress will easily cause cracks between the two, so it is necessary to optimize the connection method between the prefabricated box girder and the transition layer

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