Through prestress steel truss and concrete combined continuous steel structure bridge and construction method thereof

Abstract

The invention discloses a through prestress steel truss and concrete combined continuous steel structure bridge and a construction method of the bridge. Upper chord members and lower chord members of a steel truss beam are respectively in hollow structures, vertical prestress steel bundles are arranged inside the upper chord members of the steel truss beam for bearing the hogging moment, concrete is filled inside the lower chord members, concrete bottom plates are formed between the lower chord members in a cast-in-situ way, the concrete is filled in the upper chord members of the steel truss beam for bearing sagging moment, the lower chord members are fixedly connected for forming steel bridge panels, and the concrete bottom plates and the steel bridge panels form bridge surface bases. The concrete consumption is obviously reduced, because the bridge surface is positioned in a position corresponding to the lower chord rods, the steel structure bridge has higher universality and can be applicable to environment with confliction in height differences between the headway and the pavement at two ends of the bridge, the bridge surface height can be reduced and regulated according to environment requirements, the navigation under the bridge and the smooth butt joint between the bridge surface and the pavements at two ends can be ensured, great construction transformation on the pavements at two ends is avoided, and the construction cost is greatly saved.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a continuous rigid-frame bridge of a down-loaded prestressed steel truss-concrete composite and a construction method. Background technique [0002] The continuous rigid frame bridge is developed on the basis of T-shaped rigid frame and continuous girder bridge construction technologies. Both belong to the beam bridge system. Its structure is simple and it has good adaptability to V-shaped valleys. Bending member, the main girder body is continuous, and the girder pier is consolidated. It not only maintains the advantages of continuous girder without expansion joints and smooth driving, but also maintains the advantages of T-shaped rigid frame bridge without support and without conversion system, which is convenient for cantilever construction. Large bending and torsional rigidity can meet the force requirements of super long-span bridges. The overall performance of...

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Problems solved by technology

[0004] However, under the condition that the height of the bridge building is strictly limited, and at the same time it must meet the requirements of the navigation clearance under the bridge, the disclosed steel truss-concrete composite continuous rigid frame bridge is difficult to be suitable for the super long-span bridge structure under this condition the construction

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