Rigid connection construction and contraction technology of shear beam for splicing prestressed concrete box girders

Abstract

The invention discloses a rigid connection construction of a shear beam for splicing prestressed concrete box girders. The rigid connection construction comprises shear beams (1), small longitudinal beams (2), a new bridge box girder (3), an old bridge box girder (4), wet joints (5), shear bolt pins (6) and anchor bolts (7). The rigid connection construction has the advantages of reasonable structure, definite stress, convenient construction, and small traffic impact; besides, the rigid connection construction is economic and safe, is high in fatigue resistance and durability, also has the effect of structure reinforcement, and can enable the prestressed concrete box girders of a new bridge and an old bridge to form a good whole. The invention further provides a construction technology of the rigid connection construction of a shear beam for splicing prestressed concrete box girders.

Description

technical field [0001] The invention relates to the technical field of design and construction of bridge widening reconstruction, in particular to a rigid connection structure and construction technology of prestressed concrete box girder widening shear beams. Background technique [0002] With the development of the economy, the contradiction between the increasing traffic volume and the insufficient capacity of existing roads has become increasingly prominent. Road widening has become an effective way to relieve traffic pressure. The widening and reconstruction of existing roads can effectively increase traffic capacity. The widening of bridges is a difficult point in road widening. The widening connection of old and new bridges is different from that of newly built bridges. There are many special issues that need to be considered. At present, the commonly used widening forms of the upper structure of concrete box girder bridges are mainly hinged, rigid and unconnected. . ...

AI Technical Summary

Problems solved by technology

This kind of structure is easy to produce deflection difference at the connection between the new and old bridge structures under load, which will cause shear deformation, and the appearance of the road is not good, which will affect the safe use of the bridge structure and driving safety.

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