Assembled type steel plate bridge floor continuous structure and construction method

Abstract

The invention discloses an assembled type steel plate bridge floor continuous structure and a construction method. The continuous structure is located in a joint position of adjacent span girders of abridge and comprises an end I and an end II which are arranged on the two adjacent girders correspondingly and are opposite, a joint exists between the end I and the end II, and continuous steel plates are assembled to cover the joint and be fixed to the upper surfaces of the end I and the end II. After the girders are installed in position, the bridge floor continuous steel plates are installedin the bridge deck slab break joint of the adjacent span girders, an asphalt pavement layer is additionally laid, the structure maintains a stress system of a simply supported beam, no break joint exists in a bridge floor of the adjacent span girders, and vehicles travel smoothly. The bridge floor continuous steel plates have high capability of resisting axial tension and compression, the bendingmoment and the shearing force action, the fatal defect that a traditional concrete bridge floor continuous structure cracks when pulled is overcome, connection construction is quick, a full-assembledtype construction idea is achieved, the quality is easy to guarantee, the surface of a steel structure is coated with a bridge floor waterproof layer, the quality is guaranteed, and durability and reliability are good.

Description

technical field [0001] The invention belongs to the field of bridge engineering, in particular to an assembled steel plate bridge deck continuous structure. Background technique [0002] In the prior art, more than 80% of the total mileage of highway bridges are prefabricated girder bridges with porous standard spans. In this structural system, there will be joints between the main girders of adjacent spans at the top of the piers. The more commonly used processing methods are as follows: [0003] 1. Set up expansion joints: expansion joints are set between adjacent main girders. This structure maintains the stress system of simply supported beams, and the stress condition is good; but the cost of expansion joints is high, which affects the comfort of driving. It is easy to be damaged under the action of long-term rolling vibration, and it will affect the traffic when replacing the expansion joint structure, so it is only installed in limited necessary positions. [0004] ...

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Problems solved by technology

[0004] 2. Continuous structure: The construction method of this structure is to install the main girders of each span to form a simply supported girder bridge, and then pour joint concrete at the joints of adjacent main girders and apply negative bending moment prestressed beams to form a continuous girder bridge; This structure is conducive to comfortable driving; however, the on-site construction with continuous structure is cumbersome, the construction period is long, and the quality is not easy to guarantee, which is contrary to the bridge prefabricated construction concept

[0005] 3. Continuous bridge deck: After the main girders are in place, the joints between the main girders of adjacent spans are partially connected by bridge deck paved steel bars and cast-in-place concrete to form a continuous bridge deck structure, which not only maintains the force system of simply supported beams but also realizes The bridge deck between the main girders of adjacent spans is seamlessly connected, and the traffic is smooth; but in the later stage, the disease is common, the service life is not long, and the maintenance affects the traffic, so the structure tends to be eliminated

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