Main cable splay saddle for self-anchorage suspension bridge

Abstract

The invention discloses a main cable splay saddle for a self-anchorage suspension bridge. The main cable splay saddle comprises a lower saddle body, an upper saddle cover, a clamping cover and a base plate. A plurality of partition plates are arranged in guide slot ways in a rear saddle body of the lower saddle body and used for separating main cable strands in different columns. The upper saddle cover and the rear saddle body form a cable strand dispersing section, and the main cable strands are vertically arranged. The upper saddle cover and a middle saddle body form a cavity section. The shape that the main cable is in circular transition in a clamping section and the cable strands in the cable strand dispersing section are vertically arranged is ensured. The clamping cover and a front saddle body form the clamping section, and clamping force and anti-slid frictional resistance are provided. The base plate is fixed to the lower portion of the lower saddle body and used for fixing the whole main cable strand dispersing structure. The main cable strand dispersing structure has the advantages of both the splay saddle and a splay sleeve. A single space cable strand can be dispersed at different angles in the transverse and vertical directions, and the cable strands on the same column in the main cable can be anchored on a stiffening beam anchorage face in the same row, so that the vertical size of the anchorage face is reduced, anchorage is achieved by means of bridge transverse width so that the height of the stiffening beam can be reduced, main cable strands in the cable saddle can be easily and conveniently constructed, the installation precision of the cable strands can be controlled, and the main cable splay saddle can be applicable to the large-span anchorage type suspension bridge and has high economic benefits.

Description

technical field [0001] The invention relates to a main cable scatter saddle for a self-anchored suspension bridge. Background technique [0002] At present, the main cable scatter structure of the self-anchored suspension bridge mainly includes scatter saddle and scatter sleeve. ;The scatter saddle is similar to the main cable saddle. A groove and a partition are set in the saddle to divide the main cable strands into symmetrical rows. The columns are scattered; in order to adapt to the longitudinal displacement of the main cable during construction and operation, the saddle bottom of the loose cable saddle is provided with a slide plate or a hinge shaft support. The scatter noose is set on the theoretical scatter point and is shaped like a trumpet. The main cable strand enters the scatter noose from the small end of the trumpet shape, and directly connects to the anchor surface after radiating from the large end. The direction of the center of the main cable in the loose ...

AI Technical Summary

Problems solved by technology

However, the vertical component force generated by the main cable due to the corner will act on the stiffening beam at the base of the scatter saddle, causing additional bending moment to it, which is not good for the stiffening beam; after the main cable turns, the stiffening beam is required to provide a larger anchorage surface, which needs to be added High girder, poor economic benefit

If the loose cable sleeve structure is adopted, the center of the main cable remains unchanged, and the radial size and shape of the main cable are constrained only by the loose cable sleeve, which has no effect on the stress on the stiffening beam; but when the main cable strands are scattered, the cable force supports the top loose cable sleeve upward. Sliding, it is necessary to set the clamping section to provide clamping force and anti-sliding friction resistance; the main cable strands do not have grooves and partitions in the loose cable sleeve, and the shape of the strands is difficult to locate accurately, so the cable length cannot be accurately calculated; The loose cable sleeve is evenly stressed, and the main cable strands must be evenly spread vertically and horizontally, otherwise the strands will be staggered and squeezed, so the anchoring surface can only be made into a circle, and the shape of the anchoring surface cannot be changed. When there are many main cable strands of the suspension bridge, the anchorage surface needs to be made very large, and the economic benefit is low

[0004] For small-span self-anchored suspension bridges, the scale of the main cable is small, and both loose-cable saddles and loose-cable sleeves are applicable, but for long-span self-anchored suspension bridges, the shortcomings of both are magnified, and the applicability and economy are both reduced

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