Novel ramp bridge structure and construction method thereof

Abstract

The invention provides a novel ramp bridge structure and a construction method thereof and belongs to civil construction engineering structures. The novel ramp bridge structure is mainly composed of a steel box beam with an asymmetric curve section, a pylon, stay cables, single-column piers, an integrated bridge abutment, disc type anchoring devices, bolt pins, double-lug plates, threaded sleeves and a single lug plate. The novel ramp bridge structure and the construction method of the novel ramp bridge structure have the advantages that the curve beam is of a steel box beam structure and has good torsional property, and the self-weight of the structure is reduced; the section of a beam body is in an asymmetric form, load of the upper structure is borne by the piers and the stay cables jointly, and tumbling damage of the upper structure is avoided while the number of the single-column piers is not increased; the inclined pylon without backstays are utilized to balance horizontal branch force of the stay cables to reduce the internal bending moment of the pylon; the integrated bridge abutment is adopted to provide reliable torsional support for the curve beam and improve the durability and the driving comfort degree of a ramp bridge. The novel ramp bridge structure is suitable for design of most expressway ramp bridges, reliable in structural stress and elegant in modeling and has a certain uniqueness and advantage.

Description

technical field [0001] The invention is a novel highway ramp bridge form and belongs to the field of civil engineering bridges. Background technique [0002] A ramp bridge is a short section of ancillary bridges that provide vehicular access to and from a major arterial line (expressway, elevated road, arterial road, etc.). In expressways, in order to avoid the interference of vehicles turning from ramps to straight vehicles, ring roads are usually used to connect to other highways. Therefore just need to arrange a curved girder bridge between expressway and other roads. [0003] The superstructure of traditional curved ramp bridges generally adopts concrete continuous box girders. The bridge presents obvious characteristics of curved bridges, and the coupling effect of bending and torsion under load is obvious. The bending of the beam body will increase the torsional effect, and the torsion will increase the bending effect. These concrete box girders often have defects su...

AI Technical Summary

Problems solved by technology

It can be seen that overturning damage is a hidden danger to the safety of bridges with single-pillar piers

[0005] To sum up, the existing curved single-pillar pier ramp bridge has many diseases, the reasons are complicated, it is easy to overturn, and there are problems in durability and safety.

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