High-strength anti-skid replaceable partial cable-stayed bridge split-filament pipe cable saddle

Abstract

This invention discloses a high-strength, anti-slip, replaceable partial cable-stayed bridge saddle with a split-tube, comprising a split-tube, a bushing, and an anti-slip system. The split-tube consists of an arc-shaped tube body and two anchor plates. Multiple perforations extending axially are regularly spaced within the arc-shaped tube body. The two anchor plates are located at opposite ends of the arc-shaped tube body and are integrally connected to it. The entire split-tube is integrally cast from high-strength material, exhibiting high rigidity and strong resistance to deformation. A bushing is inserted into each perforation, with the perforation and bushing in contact via threaded surfaces. Each bushing contains a pre-drilled hole through which the steel strand can pass. Two sets of anti-slip systems are provided, each bolted to one of the two anchor plates. The anti-slip system, the split-tube, and the steel strand form a sealed space. By filling with an expansion material to clamp and fix the steel strand extending into the anti-slip system, adhesive force and circumferential pressure are generated on the steel strand, improving the anti-slip effect. Installation and replacement are also convenient.

Description

Technical Field

[0001] This invention relates to the field of cable saddle technology for partially cable-stayed bridges, specifically to a high-strength, anti-slip, replaceable split-wire cable saddle for partially cable-stayed bridges. Background Technology

[0002] Currently, the most commonly used cable saddle for cable-stayed bridge tower ends, both domestically and internationally, is the arc-shaped saddle with a continuous, multi-wire tube structure. The entire arc-shaped saddle is integrally formed with the concrete of the tower. The cable strands pass through the multi-wire tube, and anti-slip anchoring devices are installed at the anchor plates at both ends of the tower to resist the unbalanced cable forces generated by the cables on both sides of the tower. Existing multi-wire tube cable saddles mainly have the following problems: 1. Each branch tube is welded from very thin steel pipes, which can easily cause problems such as extrusion deformation and welding perforation during transportation, hoisting and welding, making it difficult to thread the steel strands during installation; in addition, the tension of the cable steel strands will generate a large radial force in the arc area. Due to the insufficient rigidity of the branch tube itself, the entire branch tube will be severely deformed by mutual extrusion, resulting in uneven stress and difficulty in later replacement. 2. Due to severe deformation of the wire splitting tube, the steel strands are squeezed against each other, resulting in uneven stress on the steel strands and making it easier to damage the protective layer of the steel strands, thus affecting durability. 3. The friction between the wire splitting tube hole and the steel strand is small, making it difficult to meet the anti-slip requirements of the steel strand; 4. Currently, the anti-slip anchoring devices at both ends of the arc-shaped cable saddle have complex structures, and their installation and disassembly are quite complicated, or even impossible, which is very unfavorable for the later replacement of steel strands. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide a high-strength, anti-slip, replaceable partial cable saddle for cable-stayed bridges, which can improve the anti-slip effect of the entire cable and facilitate installation and replacement construction.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-strength, anti-slip, replaceable partially cable-stayed bridge saddle with split-wire tubes, comprising: The splitting tube consists of an arc-shaped tube body and two anchor plates. The arc-shaped tube body has multiple perforations that extend along its axial direction. The two anchor plates are located at both ends of the arc-shaped tube body and are connected to it as a whole. A sleeve is inserted into each of the through holes, and each sleeve has a pre-drilled hole through which the steel strand can pass; and The anti-slip system consists of two sets, each set of which is connected to the two anchor plates by bolts. The anti-slip system, the wire-splitting tube, and the steel strand form a closed space, and the anti-slip system can clamp and fix the steel strand extending into the anti-slip system.

[0005] The two ends of the arc-shaped tube form two closed spaces.

[0006] Furthermore, the arc-shaped tube and the anchor plate are integrally cast from high-strength materials.

[0007] The two ends of the arc-shaped tube form two closed spaces.

[0008] Furthermore, each of the perforations has threads on its inner wall, and the gasket has threads on its outer wall.

[0009] The two ends of the arc-shaped tube form two closed spaces.

[0010] Furthermore, the gasket is made of an elastic material.

[0011] The two ends of the arc-shaped tube form two closed spaces.

[0012] Furthermore, the anti-slip system consists of two symmetrical anti-slip devices connected by bolts; the anti-slip device includes a connecting plate, an annular cylinder, and an end cap; the connecting plate is connected to the anchor plate by bolts; both the connecting plate and the end cap have through holes corresponding to the wire-splitting tube; the annular cylinder has injection holes and vent holes, so that when the steel strand passes through the anti-slip system and the anchor plate, two closed spaces can be formed at both ends of the arc-shaped tube.

[0013] Furthermore, the enclosed space is filled with an expanding material. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of a high-strength, anti-slip, replaceable partial cable-stayed bridge saddle with split wire tube, provided in an embodiment of the present invention. Figure 2 for Figure 1 The diagram shows a cross-sectional view of the wire branch tube in a high-strength, anti-slip, replaceable partial cable-stayed bridge saddle. Figure 3 for Figure 1 The diagram shows a cross-sectional view of a high-strength, anti-slip, replaceable partial cable-stayed bridge cable saddle with a split-wire tube. Figure 4 for Figure 1 The diagram shows a high-strength, anti-skid, replaceable, partially wire-slip anti-skid system in a cable-stayed bridge. Figure label: 1. Wire splitting tube; 11. Arc-shaped tube body; 12. Anchor plate; 13. Perforation; 2. Gasket; 21. Reserved hole; 3. Steel strand; 4. Anti-slip system; 41. Connecting plate; 42. Annular cylinder; 43. Bolt hole; 44. End cap; 45. Injection hole; 46. Vent hole. Detailed Implementation

[0016] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0017] Please see Figures 1 to 4 The present invention provides a high-strength, anti-slip, replaceable partial cable-stayed bridge saddle with a split wire tube, including a split wire tube 1, a pad sleeve 2, and an anti-slip system 4.

[0018] Specifically, the wire-splitting tube 1 consists of an arc-shaped tube body 11, anchor plates 12, and perforations 13; there are two anchor plates 12, which are located at both ends of the arc-shaped tube body 11 and are connected to it as a whole; multiple perforations 13 extending along its axial direction are regularly opened inside the arc-shaped tube body 11; each perforation 13 has threads on its inner wall.

[0019] As a preferred embodiment, the wire-splitting tube 1 is manufactured by integral casting using a mold, and the casting material is selected from high-strength materials (including but not limited to cast iron), which is easy to process.

[0020] It should be noted that since the wire splitting tube 1 is integrally cast using high-strength materials, the strength and rigidity of the entire wire splitting tube 1 can be improved, which can avoid problems such as deformation and melting during transportation, hoisting and welding. In addition, it can also resist the radial force generated by the tensioning of the steel strands 3 in the arc area, and prevent the entire wire splitting tube 1 from being squeezed together and severely deformed.

[0021] A sleeve 2 is inserted into each perforation 13. A reserved hole 21 is provided in the sleeve 2, through which the steel strand 3 can pass. The outer wall of the sleeve 2 is threaded.

[0022] In a preferred embodiment, the gasket 2 can be made of an elastic material and manufactured by integral injection molding. The elastic material includes, but is not limited to, mild steel and rubber. During assembly, the gasket 2 can be screwed into the through hole 13 simply by rotating it. The contact between the two through the threaded surfaces can greatly increase the frictional resistance and achieve an anti-slip effect.

[0023] It should be noted that the shape and size of the sleeve 2 should be set according to the shape and size of the through hole 13 of the wire splitting tube 1. During processing, it should be ensured that the outer wall of the sleeve 2 can fit well with the through hole 13 of the wire splitting tube 1, and the reserved hole 21 of the sleeve 2 should be designed to have a large enough contact surface with the outer wall of the steel strand 3.

[0024] In this embodiment, there are two sets of anti-slip systems 4, each set consisting of two symmetrical anti-slip devices connected by bolts 43. Specifically, the anti-slip device includes a connecting plate 41, an annular cylinder 42, and an end cap 44. The connecting plate 41 is connected to the anchor plate 12 by bolts 43. The connecting plate 41 and the end cap 44 have through holes 13 corresponding to the wire-splitting tube 1. The annular cylinder 42 has an injection hole 45 and an exhaust hole 46. After the steel strand 3 passes through the anti-slip system 4 and the anchor plate 12, two closed spaces are formed on the outer sides of both ends of the anchor plate 12. The closed spaces are filled with expansion material, and the anti-slip system 4 can clamp and fix the steel strand 3 that extends into the anti-slip system 4.

[0025] As a preferred embodiment, the anti-slip system 4 can also be manufactured by integral casting using a mold, and the casting material can be a high-strength material (including but not limited to cast iron).

[0026] It should be noted that expansive concrete can be filled into the closed space formed by the anti-slip system 4. The expansive concrete will generate both bonding force and circumferential pressure on the steel strands 3, and the interaction between the two will generate greater anti-slip force. Of course, other expansive materials can also be filled into the closed space.

[0027] The specific installation method for the aforementioned high-strength, anti-slip, replaceable cable-stayed bridge wire-sleeve saddles is as follows: The entire threaded tube 1 is precisely positioned, hoisted, and fixed. By rotating the inner wall thread of the perforation 13 and the outer wall thread of the washer 2, the washer 2 is screwed into the perforation 13. The anchor plate 12 and the anti-slip system 4 are connected by bolts 43; Two symmetrical anti-slip devices are connected using bolt 43; The steel strand 3 passes through the anti-slip system 4, the anchor plate 12, the arc-shaped tube 11, the anchor plate 12 and the anti-slip system 4 at the other end in sequence to anchor and tension the steel strand 3, forming two closed spaces. Injecting expansion material (including but not limited to expansion concrete) into the sealed space using injection holes 45 and vent holes 46 to ensure full injection; The disassembly method for the above-mentioned high-strength, anti-slip, replaceable cable-stayed bridge saddle with wire branch pipe 1 is as follows: Loosen the bolts and remove the anti-slip system at both ends 4; Remove the expanding material; Replace the steel strand 3.

[0028] The use of the aforementioned high-strength, anti-slip, replaceable partial cable-stayed bridge saddle with split-wire tube has the following advantages: 1. High rigidity and not easily deformed: The arc-shaped tube 11 and anchor plate 12 are integrally cast from high-strength materials, which has high rigidity and can avoid problems such as deformation and melting through the arc-shaped tube 11 during transportation, hoisting and welding. In addition, it can also resist the radial force generated by the tension of the steel strand 3 in the arc area, and avoid the entire arc-shaped tube 11 from being squeezed against each other and causing serious deformation. 2. Convenient construction and good protection of steel strand 3: The surfaces of the perforation 13 and the pad 2 are made of rotating threads. The pad 2 can be screwed into the perforation 13 by rotating the threads, which is convenient for construction. In addition, due to the high rigidity of the arc-shaped tube 11, it is not easy to deform. The steel strand 3 is subjected to more uniform force in the pad 2, which better protects the steel strand 3 from damage. 3. Good dual anti-slip effect: The threads on the surfaces of the perforation 13 and the pad 2 increase the frictional resistance between them, which can achieve a better anti-slip effect; in addition, by filling the closed space formed by the anti-slip system 4 with expansion material, the expansion material will generate both adhesive force and circumferential pressure on the steel strand 3, and the two interact to generate greater anti-slip force. 4. Easy to disassemble and replace: Due to the high rigidity of the arc-shaped tube 11 and its resistance to deformation, the steel strands 3 are not squeezed together, which provides very convenient construction conditions for replacing the steel strands 3 one by one; in addition, the anti-slip system 4 is connected by bolts and is very easy to disassemble. After chiseling off the expansion material, the steel strands 3 can be replaced one by one.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A high-strength, anti-slip, replaceable partially cable-stayed bridge cable saddle with split wire tube, characterized in that, include: The splitting tube consists of an arc-shaped tube body and two anchor plates. The arc-shaped tube body has multiple perforations that extend along its axial direction. The two anchor plates are located at both ends of the arc-shaped tube body and are connected to it as a whole. A sleeve is inserted into each of the through holes, and each sleeve has a pre-drilled hole through which the steel strand can pass; and The anti-slip system has two sets, and the two sets of anti-slip systems are respectively connected to the two anchor plates by bolts. The anti-slip system, the wire tube and the steel strand form a closed space, and the anti-slip system can clamp and fix the steel strand extending into the anti-slip system. The arc-shaped tube and the anchor plate are integrally cast from high-strength materials. Each of the perforations has threads on its inner wall, and the gasket has threads on its outer wall. The anti-slip system consists of two symmetrical anti-slip devices connected by bolts; the anti-slip device includes a connecting plate, an annular cylinder, and an end cap; the connecting plate is connected to the anchor plate by bolts; both the connecting plate and the end cap have through holes corresponding to the wire-splitting tube; the annular cylinder has injection holes and vent holes, and when the steel strand passes through the anti-slip system and the anchor plate, two closed spaces can be formed at both ends of the arc-shaped tube.

2. The high-strength, anti-slip, replaceable partial cable-stayed bridge cable saddle according to claim 1, characterized in that, The gasket is made of an elastic material.

3. The high-strength, anti-slip, replaceable partial cable-stayed bridge saddle with split wire tube as described in claim 1, characterized in that, The enclosed space is filled with an expanding material.

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