Novel old-arch-bridge reinforcing structure

Abstract

The invention belongs to the field of bridge reinforcing, and particularly relates to a novel old-arch-bridge reinforcing structure and a construction method thereof. The novel old-arch-bridge reinforcing structure comprises a bridge body 1, an epoxy mortar filling layer 4 is arranged below the bridge body 1, and a transverse stiffening steel frame is arranged on the epoxy mortar filling layer 4.Arc ribs are connected by using prefabricated box-type splicing steel plates 8, and prestress is applied between the arc ribs by using prestressed reinforcements 9. Then concrete is poured at arch feet, the arch rib and steel plate connecting ends and tensioning anchoring anchorage devices to form an integral structure. Finally, H-shaped steel 7, the box type splicing steel plates 8 and weld joints 5 are subjected to painting and other anti-septic treatment. The transverse stiffening steel frame structure comprises an anchor screw rod 2, an anchor bolt 3, a stiffening rib 6 and the H-shaped steel 7. The structure technology of the novel old-arch-bridge reinforcing structure can reinforce arch bridges, construction is simple and convenient, the cost of reinforcement is low, dead weight enhancement is less, and the reinforcement effect is good; and the novel old-arch-bridge reinforcing structure is a relatively economical and safe method to reinforce the arch bridges based on structuralforce analysis.

Description

technical field [0001] The invention relates to a reinforced old arch bridge structure, which belongs to the field of bridge reinforcement. Background technique [0002] With the development of society, the service life of arch bridges increases, and the traffic volume and vehicle load increase rapidly, resulting in varying degrees of cracking and disease in the main structure of arch bridges, followed by a gradual decrease in its bearing capacity. If the old bridges are completely demolished and rebuilt, this It requires a lot of manpower and material resources, which the government cannot bear, and it will have a great impact on the transformation of traffic, so it is particularly important to reinforce the old bridge. In the existing technology, the reinforcement methods of the arch bridge mainly contain the following types: [0003] 1. The method of reducing the weight of arched buildings: This method adopts methods such as light arched fillers, longitudinal perforation...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the anchor-spraying technology to strengthen the arch bridge is that the sprayed concrete needs to be borne by the original structure before solidification, which affects the bearing capacity of the structure; and the arch bridge has the disadvantage of low strength in the later stage, which is not conducive to the permanent use of the bridge.

[0006] 4. Other methods of strengthening old arch bridges, such as shortening the span, arching (lining method), arch-beam combination, etc., have varying degrees of deficiencies, and the construction period is long

Traditional reinforcement structures and reinforcement methods can no longer meet the requirements of low-cost, high-quality, and high-efficiency engineering projects. There is an urgent need for a convenient and fast construction, low cost, and high-quality reinforcement structure method

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