CN212925778U - Bonding and fixing pre-shaping main cable unit strand - Google Patents

Abstract

The utility model provides a fixed shaping main push-towing rope unit strand in advance bonds, its characterized in that: the cross-sectional shape of the saddle section of the main cable unit strand formed by the steel wires is rectangular, annular bonding sections are arranged at intervals of the saddle section, the outer wall of each annular bonding section is coated with a layer of adhesive, the gaps of the outer layer of the steel wires of the annular bonding sections are filled with the adhesive, and the strand is wound and wrapped with a binding belt outside the saddle section. The utility model discloses creatively adopted the normal atmospheric temperature curing adhesive hoop to paint at the outer steel wire of strand, the outer steel wire of strand and adhesive become the hoop that keeps strand rectangular shape after the solidification and force the restraint, and this method has both fixed strand rectangular shape, does not increase strand rectangle overall dimension again, can wholly directly insert the saddle when the strand goes into the saddle, has improved the efficiency that the strand goes into the saddle by a wide margin for the engineering construction progress.

Description

Bonding and fixing pre-shaping main cable unit strand

Technical Field

The utility model relates to a cable field for suspension bridge specifically is shaping main push-towing rope unit strand in advance.

Background

The main cable of the suspension bridge is manufactured, erected and installed by adopting a PPWS (prefabricated parallel steel wire bundle strand) method, namely, each cable strand is formed into a bundle with a cross section being a regular hexagon by a plurality of high-strength steel wires in a factory, and then the bundle is transported to a project site of the suspension bridge for erection and installation. The load of the suspension bridge is transmitted to the bridge tower through the main cable and the cable saddle, so that the cross section shape of the cable strand is attached to the shape of the cable saddle groove in order to increase the contact area between the main cable and the cable saddle, and the cross section shape of the cable strand in the cable saddle groove part needs to be shaped into a rectangle by a regular hexagon.

The process that the unit strand integer is the rectangle and merges into the saddle is "integer income saddle", and there are two kinds of modes in the saddle is gone into to the integer at present: one mode is to implement the cable strand shaping operation on the project site, the operation is relatively difficult due to limited site conditions and high-altitude operation, the steel wire and the coating thereof are easily damaged by repeatedly knocking and adjusting the steel wire in the shaping process, and the anti-corrosion performance and the service life of the unit cable strand are influenced; the second way is to perform pre-shaping during the strand production, i.e. to shape the cross-sectional shape of the strand from regular hexagon to rectangle in advance in the factory according to the position of the cable saddle in the length of the strand. The process of cable coiling, anchor making and the like is carried out after the cable strand is shaped, if the cable strand at the rectangular section is bound by only a wrapping belt, the steel wire of the cable strand is easy to misplace and jump, and therefore the rectangular shape of the cable strand can be kept only by adopting a forced constraint fixing measure. A fixing method for forcibly restraining a clamp hoop or a positioning hoop is proposed in 91-wire preformed suspension bridge main cable strand (authorized bulletin number: CN 208309382U), suspension bridge main cable preformed unit cable strand (authorized bulletin number: CN 203923907U) and the like, the clamp hoop or the positioning hoop is formed by punching steel plates with the thickness of 2-4 mm, and a set of the clamp hoop or the positioning hoop is composed of two halves and is clamped on the outer side of a rectangular cable strand to fix the shape of the cable strand. But when the installation was erect to the strand, because the clearance is narrow and small between saddle groove and the rectangle strand, the unable whole direct access saddle of strand, need to get into the saddle groove with clamp hoop or location hoop back strand, and the strand is difficult to keep the rectangle again after removing clamp hoop or location hoop, still need carry out the strand shape adjustment once more and maintain, has seriously reduced the efficiency that the strand went into the saddle, has also restricted the using widely of pre-reforming type main push-towing rope unit strand.

Disclosure of Invention

The utility model provides a fixed shaping main push-towing rope unit strand in advance bonds, its purpose is to solve prior art's shortcoming, provides a simple structure, convenient to use, improves the unit strand preforming fixed knot who goes into saddle efficiency of strand and constructs.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a fixed pre-shaping main push-towing rope unit strand that bonds which characterized in that:

the cross-sectional shape of the saddle section of the main cable unit strand formed by the steel wires is rectangular, annular bonding sections are arranged at intervals of the saddle section, the outer wall of each annular bonding section is coated with a layer of adhesive, the gaps of the outer layer of the steel wires of the annular bonding sections are filled with the adhesive, and the strand is wound and wrapped with a binding belt outside the saddle section.

The length of the annular bonding section is 60mm, and the interval between adjacent annular bonding sections is 1.5 m.

On the annular adhesive segment, the steel wires can slide in the length direction of the strand in addition to the outer steel wires bonded with the adhesive.

The utility model discloses an useful part lies in:

in order to solve preforming main push-towing rope unit strand when going into the saddle, the unable whole direct access saddle of strand of area clamp hoop or location hoop, get rid of behind clamp hoop or the location hoop, still need carry out the problem of strand shape adjustment and maintenance once more, the utility model discloses creatively adopted the normal atmospheric temperature solidification bonding agent hoop to paint at the outer steel wire of strand, the outer steel wire of strand and bonding agent become the hoop compulsory restraint that keeps strand rectangular shape after the solidification, the method had both fixed strand rectangular shape, had not increased strand rectangle overall dimension again, can wholly directly access the saddle when the strand goes into the saddle, improved the efficiency that the strand went into the saddle by a wide margin for the engineering construction progress.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic cross-sectional view of a strand pre-reforming.

FIG. 2 is a schematic cross-sectional view of the cable strand pre-shaping of the present invention;

FIG. 3 is a schematic view of the belt clamp for pre-shaping the cable strand according to the present invention;

fig. 4 is a schematic view of the saddle section (not shown) of the cable strand of the present invention.

Detailed Description

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained according to the drawings without inventive labor.

As shown in FIG. 1, a strand 127 consisting of strand wires 1 is wrapped with a binding band 2 in a hexagonal cross-sectional shape.

As shown in fig. 2 and 3:

when the main cable unit strand is produced to the position of the saddle section 5 matched with the cable saddle, the traction of the strand is stopped. The cross section of the 127-wire cable strand is shaped into a rectangle from a regular hexagon, and the two sets of detachable fixtures 4 are adopted for temporary fixation at an interval of 60 mm.

Preparing normal temperature curing adhesive, wherein the curing agent consists of epoxy resin, polyamide and dibutyl ester.

Coating an adhesive 3 in the outer layer of the strand in the circumferential direction, only coating the outer layer of the steel wire 1 of the strand, wherein the outer layer of the steel wire 1 is a steel wire with a surface contacting with a space except the strand, and the other steel wires 1 except the outer layer of the steel wire 1 combined with the adhesive 3 can slide in the length direction of the strand; the smearing length a =60mm, the smearing thickness is based on filling the gap of the outer layer steel wire 1, only a thin layer is needed to be smeared on the outer wall of the strand, and the overall dimension of the strand is hardly increased. The steel wires 1 and the adhesive 3 of the outer layer of the strand form annular forced restraint.

The strand coated with the adhesive 3 is wrapped with a wrapping tape 2 to be fixed, and the number of the wrapping layers is 6 to 8. The binding band 2 is made of high-strength fiber polyester band.

The adhesive 3 is a normal temperature curing adhesive, is cured about 2-5 min after being coated, and then the temporary fixing clamp 4 is removed to form an annular bonding section 6 with the length a =60 mm.

And repeating the steps, and arranging one annular bonding section 6 at each b =1.5m of the saddle entering section 5 of the cable strand. Repeating 7 to 8 times according to the whole length of the saddle entering segment 5.

And after the saddle entering section 4 of the cable strand is shaped, the cable strand is continuously produced.

Thus, as shown in fig. 2 and 4, 127 wires are bonded and fixed to the preformed main cable unit strand, including the steel wires 1 of the strand, the ligature band 2 and the adhesive 3. The saddle entering section 5 of the main cable unit strand is about 16 meters long (other lengths can be provided, the length a of the annular bonding section 6 and the distance b between the adjacent annular bonding sections 6 are correspondingly adjusted), the cross section of the saddle entering section 5 of the main cable unit strand formed by the steel wires 1 is rectangular, 8 annular bonding sections 6 are provided, the length a =60mm of each annular bonding section 6, and the interval =1.5m between the adjacent annular bonding sections 6. The gaps of the steel wires 1 on the outer layer of the annular bonding section 6 are filled with bonding agents 3, and binding bands 2 are wrapped outside the strand steel wires with rectangular sections.

When the cable strand is erected and installed, the 127 wires are used for bonding and fixing the whole saddle entering section 5 of the preformed cable strand to directly enter the saddle.

The remarkable characteristics of 127 silk bonding fixed preforming main cable unit strand in this embodiment are: the normal temperature curing adhesive is annularly coated on the outer steel wire of the cable strand, the outer steel wire of the cable strand and the adhesive become a forced constraint for keeping the rectangular shape of the cable strand after curing, the coating thickness is accurate to fill and level the gap between the outer steel wires, the overall dimension of the cable strand is not increased, and the cable strand can be integrally and directly inserted into a saddle when being erected and installed, so that the engineering construction progress is accelerated.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. The utility model provides a fixed pre-shaping main push-towing rope unit strand that bonds which characterized in that:

the cross-sectional shape of the saddle section of the main cable unit strand formed by the steel wires is rectangular, annular bonding sections are arranged at intervals of the saddle section, the outer wall of each annular bonding section is coated with a layer of adhesive, the gaps of the outer layer of the steel wires of the annular bonding sections are filled with the adhesive, and the strand is wound and wrapped with a binding belt outside the saddle section.

2. The adhesively secured pre-profiled main cable element strand as set forth in claim 1, wherein:

the length of the annular bonding section is 60mm, and the interval between adjacent annular bonding sections is 1.5 m.

3. The adhesively secured pre-profiled main cable element strand as set forth in claim 1, wherein:

on the annular adhesive segment, the steel wires can slide in the length direction of the strand in addition to the outer steel wires bonded with the adhesive.

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