KR20070025606A - Civil construction including cable-side saddles and saddles thereon - Google Patents

Abstract

A deviation saddle for a cable consisting of n number of individual strands (8), each of which has n ducts arranged to receive the strands (8) of the cable, at least some of which are curved. 12, 14 are provided for convenience birds. The various ducts are formed in several successive barrels 11, 13, each barrel having two opposing major surfaces, n through holes 12, 14 passing through the major surfaces. Are formed, the major surfaces of two successive barrels are in contact with each other, and the through holes 12, 14 of the several barrels are formed so that each through hole of one barrel corresponds to the corresponding barrel of the adjacent barrel to form the duct. Arranged to exit into the through hole, the curved duct is obtained by changing the direction between successive holes of the several barrels.

Description

CABLE DEVIATION SADDLE AND CIVIL ENGINEERING STRUCTURE INCLUDING SUCH A DEVIATION SADDLE}

1 is a schematic diagram of a suspension bridge that may employ convenience birds according to the present invention.

2 is a cross-sectional view of one of the pedestals of the suspension bridge of FIG.

3 is a perspective view of a convenience saddle connected to the pedestal of FIG.

4 is a cross-sectional view along the axis of the saddle of FIG. 3.

5-7 are detailed views showing several alternative embodiments of the holes of the barrel belonging to the saddle of FIG. 4.

** Description of symbols for the main parts of the drawing **

1: suspension bridge

2: deck

3: vertical hanger

4: suspension cable

5: vertical piers

6: pedestal

7: convenience birds

8: strand

9: exterior

10: support ring

11: first metal barrel

12: through hole

13: plastic barrel

14: through hole

The present invention relates to cable deviation saddles and civil structures comprising such bias saddles.

More specifically, the present invention is a convenience saddle for a cable consisting of a number of individual strands of n, comprising n ducts, at least some of which are curved and each duct being a strand of cable. Concerning birds that are intended to accommodate them.

French Laid-Open Patent Publication FR-A-2 511 721 discloses such convenience birds, in which the curved ducts are formed by cement grout injected into a sheath containing all individual tubes. It is formed by individual tubes on which the position is fixed.

These known convenience birds work very satisfactorily in the most common case, especially where the same deviation is produced in all the individual strands forming the cable.

However, the positioning accuracy of the various individual tubes intended to receive the strands of the cable has been found to be insufficient in some cases, especially where it is required that the strands of the cable diverge from one another from the biasing birds.

The object of the present invention is in particular to solve this difficulty.

For this purpose, according to the present invention, a biasing bird of this type is characterized in that the various ducts are formed in several successive barrels, each barrel having two opposing main surfaces, N through holes are formed through, and the major surfaces of two consecutive barrels are in contact with each other, and the through holes of the several barrels correspond to the adjacent barrels so that each through hole of one barrel forms the duct. And the curved duct is obtained by changing the direction between successive holes of the several barrels.

According to this configuration, in a simple and inexpensive manner, it is possible to completely control the shape of the various individual ducts that receive the cable strands.

Specific embodiments of the convenience saddle according to the present invention may employ one or several of the following technical configurations.

The change in direction between two successive through holes belonging to the same duct is less than 4 degrees.

At least the through hole of the curved duct is formed in a trumpet shape at least at one of its ends.

At least part of the barrel is made of plastic and arranged in a metal tube.

The convenience saddle extends parallel to the direction of the duct between the two ends, one of the ends comprising a metal barrel, the metal barrel having an exposed front face and a rear face opposite the at least one plastic barrel; do.

Also subject to the invention is a civil construction comprising at least one suspended component supported by at least one cable, the cable consisting of n number of individual strands, the at least one bias defined above Penetrating through the birds, at least a portion of the strand is a civil structure, characterized in that the direction is changed.

Specific embodiments of the civil engineering structure according to the present invention may employ one or several of the following technical configurations.

A convenience bird is securely connected to said one fixed component such that there is no possibility of slipping with respect to one fixed component.

Civil structures form suspension bridges, in which cables are fixed to two abutments and supported by deck hangers.

A suspension bridge comprising two piece of birds fixed to two pedestals with a cable passing through each piece of said bird.

Each strand of the cable consists of a steel core surrounded by a plastic sheath.

The sheath of each strand of the cable is integrally formed with the corresponding core such that there is no possibility of relative slippage between the sheath and the core.

Other features and advantages of the present invention will be apparent from the following description of one embodiment provided as a non-limiting example with reference to the accompanying drawings.

Like reference numerals in the drawings indicate the same or similar components.

1 shows a suspension bridge 1 whose deck 2 is connected to two parallel suspension cables 4 by means of a vertical hanger 3, each suspension cable being two Passing over the vertical piers 5, the ends of which are fixed to two pedestals 6.

As shown in FIG. 2, each leg rest includes convenience saddles 7, which are secured to the pedestal 6 and are provided with a plurality of strands 8 constituting the suspension cable 4. It can be unfolded before being fixed to the pedestal 6, and no sliding function is required.

As shown in FIGS. 3 and 4, the convenience saddle 7 may comprise an outer steel sheath 9 at the end, the front face of which is a plastic sheath enclosing a plurality of individual strands 8 of the suspension cable. 4a is provided.

The tubular sheath 9 is firmly fixed to the pedestal 6 via the support ring 10, so that no slip occurs between the support ring and the pedestal.

In addition, the tubular sheath 9 comprises several side-by-side cylindrical barrels, each having n, generally hundreds of holes, equal to the number of individual strands 8 of the suspension cable. Each hole of the barrel receives one strand 8.

In the embodiment shown in Figures 3 and 4, these barrels are four in number,

And n straight holes 12 mounted near the front end of the tubular sheath 9 and parallel to the direction X of the suspension cable 4 towards the front of the convenience saddle, the front face of which is exposed. The first metal barrel 11,

Three plastic barrels 13 which are mounted continuously opposite to the rear face of the first barrel.

Each of these plastic barrels 13 can be made, for example, of high density polyethylene and comprises n straight holes, which appear on both sides of each barrel and are interconnected from one barrel 13 to another. Corresponding and arranged to communicate with the apertures 12 of the first barrel 11 (benefit the barrels 11, 13 can be indexed in an angular direction inside the sheath 9 to provide this result). ).

In this embodiment, the holes 14 arranged in the upper half of the barrel 13 are all parallel to the above-mentioned direction X so that these holes 14 form a straight duct with the corresponding holes 12 and strand (8) passes through this duct without bias, and the holes 14 disposed in the lower half of each barrel 13 are not parallel to the direction X and form a non-zero angle with this direction and this angle is one. Strand 8 is biased downwards from its barrel toward the other barrel.

In the embodiment described,

The lower opening 14 of the barrel 13 located closest to the barrel 11 makes an angle of 1 degree with the direction X,

The lower hole 14 of the barrel 13 then makes an angle of 2 degrees with said direction X, thereby further biasing the strand 8 downwards,

The lower opening 14 of the last barrel 13 faces downwards, thereby making an angle of 3 degrees with the direction X, giving the strand a total of 3 degrees downward bias.

More generally, the angle of bias from one hole 14 to the next in the same curved duct is preferably less than 4 degrees and advantageously less than 2 degrees.

The strand 8 used within the scope of the invention is advantageously made of a steel core surrounded by a plastic sheath, preferably surrounded by a sheath which is formed integrally with the steel core and does not slip against it.

As an example, the strand 8 may use the same strand as described in the document of EP-A-0 855 471.

The use of sheathed strands and the fact that the individual guides allow the strands to receive relatively low pressure on the biasing saddle can allow each strand 8 to slide in the duct formed by the corresponding holes 12, 14. Means. Thus, unlike the conventional saddle, the sliding bearing is no longer needed between the support plate 10 and the pedestal 6.

The holes 14 forming the curved duct are advantageously formed in a trumpet shape at one or both ends thereof, for example the trumpet shape of the hole 14 is a round fillet 14a (FIG. 5). And FIG. 6) or cut out edges (FIG. 7).

According to the present invention, even if it is required that the strands of the cable diverge with respect to each other from the biasing birds, the position of the various individual tubes which are adapted to receive the strands of the cable can be sufficiently accurately positioned. That is, according to the present invention, in a simple and inexpensive manner, it is possible to completely control the shape of the various individual ducts that receive the cable strands.

Claims (11)

A deviation saddle for a cable consisting of n number of individual strands (8), each of which has n ducts arranged to receive the strands (8) of the cable, at least some of which are curved. 12, 14, comprising: The various ducts are formed in several successive barrels 11, 13, each barrel having two opposing major surfaces, n through holes 12, 14 passing through the major surfaces. Are formed, the major surfaces of two successive barrels are in contact with each other, and the through holes 12, 14 of the several barrels are formed so that each through hole of one barrel corresponds to the corresponding barrel of the adjacent barrel to form the duct. And a curved duct arranged to exit through the through hole, wherein the curved duct is obtained by changing the direction between successive holes of the several barrels. 2. The saddle according to claim 1, wherein the change in direction between two successive through holes (12, 14) belonging to the same duct is less than 4 degrees. The convenience saddle according to claim 1 or 2, wherein at least the through-hole of the curved duct is formed in a trumpet shape at least at one of its ends. Comfort saddle according to any one of the preceding claims, characterized in that at least part of the barrel (13) is made of plastic and arranged in a metal tube (9). 5. The biasing saddle according to claim 4, wherein the biasing saddle extends parallel between the two ends in the direction of the ducts 12, 14, one of the ends comprising a metal barrel 11, the metal barrel being exposed front side. And at least one plastic barrel (13) having a rear face oppositely installed. Civil structure comprising at least one hanging component (2) supported by at least one cable (4), The cable consists of n number of individual strands 8 and passes through at least one biasing saddle 7 according to any one of the preceding claims, Civil construction, characterized in that at least part of the strand (8) is changed in direction. Civil construction according to claim 6, characterized in that the biasing saddle (7) is firmly connected to the one fixed component (6) such that there is no possibility of sliding with respect to one fixed component (6). 8. The cable (4) according to claim 6 or 7, characterized in that the cable (4) is fixed to two abutments (6) and supports the deck (2) by a hanger (3). Civil construction. 10. Civil construction according to claim 8, characterized in that it comprises two convenience saddles (7) fixed to two pedestals (6), wherein the cable (4) passes through each of the comfort saddles. 10. Civil construction according to any one of the claims 6-9, characterized in that each strand (8) of the cable consists of a steel core surrounded by a plastic sheath. The civil construction of claim 10 wherein the sheath of each strand of the cable is integrally formed with a corresponding core such that there is no possibility of relative slippage between the sheath and the core.

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