Reinforced rigid-framed arch bridge

Abstract

The invention relates to a reinforced rigid-framed arch bridge. A girder with a box-shaped section is formed on arch parts by pouring, and connectors are anchored to the arch parts and connected with steel bars of the girder with the box-shaped section. The girder with the box-shaped section is integrated with the arch parts and the connectors in concrete pouring. Compared with an original arch ring size increasing type reinforcement technique, the reinforced rigid-framed arch bridge has the advantages of convenience in construction, saving of manufacturing cost, short construction period and excellent reinforcement effects. To be more specific, the original technique requires support setup under the bridge and aloft work and is high in difficulty and risk and difficult in hole drilling and steel bar embedding for arch structures; the new technique avoids expensive supports and safety maintenance cost; support setup and maintenance time is saved; the original arch ring size increasing type reinforcement technique improves bearing capacity by the aid of added concrete parts which can be hardly combined with old concrete due to inevitable factors such as contraction, and integration of added arch supports with abutment parts is difficult, so that the new reinforcement technique which improves bearing capacity by the aid of the added girder is more effective in reinforcement.

Description

technical field [0001] The invention relates to a bridge, in particular to a structural reinforcement of a rigid frame arch bridge. Background technique [0002] Rigid frame arch bridge is a type of bridge structure widely built in my country from the early 1970s to the early 1990s. For this kind of bridge, a number of prefabricated arch pieces are placed on the piers first, and then the horizontal connection system is constructed, and finally the bridge is constructed. surface to form an overall structure. Since the amount of steel used in the arch piece is less, material is saved, and the hoisting weight is not large during construction, it is suitable for the technical level of my country's steel shortage and limited hoisting capacity at that time. However, this kind of rigid frame arch bridge is constructed by prefabricating arch pieces, beams, slightly curved plates and other components, and then adopting the assembly method of integrating parts into a whole. limited. ...

AI Technical Summary

Problems solved by technology

[0003] For arch bridges with rigid frame arch bridges, the main stress-bearing structure is the arch, which is a component mainly subject to compression. The reinforcement measures are generally to increase the cross-section of the arch ring to improve the bearing capacity, but This reinforcement measure needs to set up supports in the water, which is difficult and expensive to construct. In addition, it is difficult for the newly added arch ring section to bear the same force as the old concrete section. The construction is complicated and the reinforcement effect is often difficult to guarantee.

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