Main cable pylon structure of suspension bridge

Abstract

The invention discloses a main cable pylon structure of a suspension bridge. The main cable pylon structure comprising a cable saddle and a plurality of cable strands. The plurality of cable strands are supported by the cable saddle; the cable saddle comprises a cable saddle bottom plate and a cable strand fixing plate, wherein the cable strand fixing plate is fixed on the cable saddle bottom plate; the cable strands comprise a plurality of steel wires and a plurality of forming bushings, wherein the steel wires are arranged in parallel, and the forming bushings surround the steel wires; the top surface of the cable strand fixing plate is provided with a plurality of cable saddle slots which are arranged in parallel; the side walls of the cable saddle slots are provided with a plurality of pairs of first positioning slots which are aligned to each other, wherein the number of pairs and the size of the first positioning slots are match with those of the forming bushings on the cable strands; and the first positioning slots are used for limiting the cable strands and preventing the main cable strands from moving relatively. Due to the adoption of the positioning slots, the movement of the cable strands is greatly prevented, the anti-sliding capacity of a middle cable pylon and the cable strands is improved, and the structural rigidity of a suspension bridge with multiple cable pylons is enhanced. The main cable pylon structure of the suspension bridge is particularly suitable for a large-span suspension bridge with multiple cable pylons and has high national economic benefit.

Description

technical field [0001] The invention belongs to the technical field of civil engineering construction, and in particular relates to a main cable pylon structure of a suspension bridge suitable for the mid-pylon cable strands of a long-span multi-tower suspension bridge without slippage. Background technique [0002] To build a bridge at the mouth of a wide bay along the coast or on a strait between an outlying island and the land, if it is necessary to have multi-directional navigation routes on the bridge or the basic engineering in the water is difficult and expensive, the structural scheme of multi-tower and multi-span suspension bridge is adopted, which not only It is technically reasonable and economically economical, and can reduce the density of bridge piers and the adverse impact on the ecological environment of water areas. Compared with the double-tower single-span suspension bridge with one span in the middle, the multi-span suspension bridge can greatly reduce th...

AI Technical Summary

Problems solved by technology

Since the constraint on the top of the middle tower is much weaker than that of the side towers, when a basic variable load is applied to one main span and the other main span is not loaded, if the stiffness of the middle tower is small, although the force difference of the main cables is small, the load The deflection of the span stiffening beam will be greatly increased; if the stiffness of the middle tower is large, the deflection of the loaded span stiffening beam will not be large, but the force difference of the main cable is large, and the unbalanced horizontal force generated may cause the main cable to slide in the saddle , resulting in a greater deformation of the stiffened beam

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