Manufacturing and saddle-in system for preformed strands of main cables of a suspension bridge

Abstract

The invention relates to the technical field of suspension bridges, and discloses a suspension bridge main cable preformed strand manufacturing and saddle system, including preformed processing tools: steel wires are marked and assembled into hexagonal cross-section strands, wrapped on Cable ties and wrapping tapes are rolled up into a coil; cable strand shaping machine: shape the cross section of the cable strand into the saddle transition area into a quadrilateral; auxiliary spreader: lift the cable strand and move it to 30 to 40 cm above the saddle groove place. The preformed strand manufacturing and saddle system of the main cable of the suspension bridge limits the position and adjusts the angle of the strands before saddle, reduces the difficulty of saddle, avoids the opening of the saddle groove from scratching the strands, and adjusts the strands before saddle. Positioning adjustment reduces the stress of the steel wire, and at the same time, the extrusion force of the cable strands in the saddle groove is more reasonably dispersed, reducing the extrusion displacement of the steel wires in the cable strands, and greatly reducing the crossing of the steel wires after entering the saddle. Slide into the saddle groove in one step, and slightly open the saddle groove to further reduce the extrusion force on the strands.

Description

technical field [0001] The invention relates to the technical field of suspension bridges, in particular to a suspension bridge main cable preformed strand manufacturing and saddle system. Background technique [0002] The main cable of suspension bridges is usually erected using the PPWS method, that is, the steel wires are assembled into strands (preformed) with a regular hexagonal cross-section in the factory, and then multiple strands are aggregated into the main cable at the construction site. [0003] see figure 1 , since the main cable saddle of the suspension bridge and the side span loose cable saddle are used to fix the cable strands, the saddle groove partitions are installed vertically and parallel. In order to facilitate installation and bear a certain friction force, the cable strands are shaped at the cable saddle It has a rectangular cross-section and is placed in the saddle groove. Since a certain friction force needs to be maintained between the cable stra...

AI Technical Summary

Problems solved by technology

[0004] Because the cable saddle has a certain span, it is necessary to apply a certain pressure to put the cable strands into the saddle groove. If the cable strands are put into the saddle groove, there will be a slight arc, and there will be greater friction between the cable strands and the cable grooves. The steel wire will generate a certain amount of stress when it is pressed into the cable strand, and it is very easy to cause drumming, bending or breaking of the wire, which will affect the quality of the bridge.

[0005] Furthermore, the angle of the cable strands entering the groove may be inclined, which will change the shape of the cable strands. After entering the groove, it will take a lot of time to reorganize the shape of the plain strands. There are steel wire crossings inside the strands, which further affects the quality of the bridge. At the same time, since the carding is made of iron tools, it is easy to damage the galvanized layer of the steel wire and damage the quality of the steel wire.

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