Assembly-type beam body and construction method thereof

Abstract

The invention discloses an assembly-type beam body. The assembly-type beam body comprises multiple precast box beam bodies and pre-stressed reinforcing bars connected with the multiple precast box beam bodies. The precast box beam bodies are provided with transverse pre-stressed ducts. The pre-stressed reinforcing bars pass through the transverse pre-stressed ducts of the precast box beam bodies and two ends of each transverse pre-stressed duct are fixed through anchor plates. Non-contract concrete is poured between each pre-stressed reinforcing bar and each transverse pre-stressed duct. When the multiple precast box beam bodies are connected, the pre-stressed reinforcing bars pass through the transverse pre-stressed ducts and the anchor plates are installed. After the pre-stressed reinforcing bars are tensioned, grouting operation is performed. The assembly-type beam body has the following beneficial effects: transverse connection among the beam bodies is enhanced; and stress of hinge joints is reduced.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to an assembled beam body and a construction method thereof. Background technique [0002] Prefabricated prestressed concrete girder bridges are widely used in bridge engineering because of their advantages such as fast construction speed, short construction period, and easy standardization. Whether at home or abroad, prefabricated prestressed concrete girder bridges account for a large proportion of small and medium-span bridges. However, with the wide application of this type of bridge, some problems have arisen in the process of use, especially in the aspect of the lateral connection of the beam body. Because many bridge designers in our country have insufficient understanding of the lateral force of prefabricated beams, there are many problems in the lateral connection of prefabricated bridges. With the increase of traffic volume and the impact of overloaded vehicles...

AI Technical Summary

Problems solved by technology

The stress on the single plate will increase the load lateral distribution coefficient of the beam, seriously weaken the integrity of the bridge, and it is likely to put the upper structure of the entire bridge in an extremely unfavorable stress state, and will also reduce the durability of the bridge

In order to solve the connection problem in the traditional connection method, there are still many designs that try to increase the hinge joint or add structural reinforcement in the hinge joint to increase the reliability of the hinge joint and prevent its damage, but this does not change the fact that the hinge joint is the main transverse transmission. The nature of force components

If factors such as shrinkage and creep of concrete and the bonding of new and old concrete are considered, it is difficult for these methods to ensure that such complex hinge joints will not be damaged

If things go on like this, the damage of the transverse connection will seriously affect the service life of the bridge

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