Continuous structure and construction method of assembled steel plate bridge deck

Abstract

The invention discloses a continuous structure and construction method of an assembled steel plate bridge deck. The continuous structure is located at the joint of main girders of adjacent spans of the bridge, and includes opposite ends I and II of two adjacent main girders respectively. , there is a joint between the end part I and the end part II, and the upper surface of the end part I and the end part II is covered with a continuous steel plate; The continuous steel plate of the bridge deck is installed between the broken joints of the main girders of the adjacent spans, and then the asphalt pavement is laid. The continuous steel plate of the bridge deck has a strong ability to resist axial tension and compression, bending moment, and shear force, which overcomes the Achilles heel of the traditional continuous structure of concrete bridge deck cracking under tension, and the connection construction is rapid. The prefabricated construction concept is easy to guarantee the quality. Under the quality assurance of the steel structure surface coating and bridge deck waterproof layer, it has good durability and reliability.

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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