Suspension bridge with three main cables and double tower columns

Abstract

The invention provides a suspension bridge with three main cables and double tower columns. The suspension bridge is characterized by comprising a main girder, the tower columns, bridge tower transverse beams, the edge side main cables, the middle main cable and anchorage; the main girder is of an integral type structure or a split type structure; the tower columns are arranged on two sides of themain girder in pairs, are positioned on upstream sides and downstream sides, are solidified with the earth and are used for bearing the edge side main cables and the main girder; the bridge tower transverse beams include an upper bridge tower transverse beam, a middle bridge tower transverse beam and a lower bridge tower transverse beam and are solidified between the tower columns arranged in pairs; the edge side main cables are mounted on the tops of the tower columns via edge side cable saddles and are connected with the tops of two sides of the main girder by edge side suspension cables; the middle main cable is mounted on the top of the middle of the upper bridge tower transverse beam via a middle cable saddle and is connected with the top of the middle of the main girder by a middlesuspension cable; the edge side main cables and the middle main cable are solidified with the earth via the anchorage. The suspension bridge with the three main cables and the double tower columns hasthe advantages that the sizes of the main girder and cable towers can be effectively diminished, the engineering cost can be lowered, and the stress performance of the main girder can be greatly enhanced.

Description

technical field [0001] The present disclosure relates to the technical field of bridge engineering, in particular to a suspension bridge with three main cables and two tower columns. Background technique [0002] The suspension bridge is a flexible cable bridge structure whose main load-bearing component is tensioned by the main cable. The self-weight of the main girder, the dead load of the second phase, and the live load of the vehicle are all transmitted to the main cable through the sling, and finally the main cable transmits all the loads from the main tower and anchorage to the foundation. Traditional suspension bridges generally adopt a double main cable and double tower column structure, such as the Humen Bridge with a main span of 888m, the Jiangyin Bridge with a main span of 1385m, and the Xihoumen Bridge with a main span of 1650m. At present, the suspension bridge usually bears the vehicle load of 4 lanes or 6 lanes, and adopts a streamlined steel box girder stru...

AI Technical Summary

Problems solved by technology

However, the double-layer steel truss girder suspension bridge adds vertical bars and diagonal web bars between the two decks, and the materials increase more, the coating area is larger, and the maintenance cost is higher

If the main girder is changed to a split steel box girder, and the structure of three main cables and three tower columns is adopted, it is necessary to increase the beam between the split steel box girders, the middle tower column and the foundation of the middle tower column, and the cost will be greatly increased.

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