Catwalk structure

Abstract

The catwalk structure comprises a catwalk, one end of the catwalk is anchored on a beam surface, the other end of the catwalk is anchored on a tower top, the catwalk comprises a catwalk bearing cable, the catwalk bearing cable is a steel core steel wire rope, and the two ends of the catwalk bearing cable are connected with anchoring parts through bearing pear-shaped rings and chucks; the adjusting device is formed by connecting a catwalk bearing cable head with an anchor beam through a connecting seat and an adjusting pull rod and connecting the anchor beam with a tower top lifting lug through a pull rod; the catwalk surface layer comprises a square steel tube arranged on the catwalk bearing cable, a roller bracket connected with the square steel tube in a binding manner, a nylon pulley arranged on the roller bracket, and a U-shaped clamp for buckling and connecting the surface layer cross beam with the catwalk bearing cable; the utility model has the beneficial effects that common profile steel materials are utilized, other tools or materials are not required to be added, the operation is simple, convenient and fast, and the construction cost is low; manpower can be saved, the construction progress is accelerated, and cost is saved; through repeated use in practical engineering, the requirements of strength and safety can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of temporary engineering used in municipal and highway bridge engineering, and specifically relates to a catwalk structure. Background Art

[0002] The construction of cable bridges is often encountered in municipal and highway bridge projects. In the construction of cable bridges, it is necessary to construct the auxiliary engineering catwalk of the cable before the cable construction, otherwise the cable and the hanger cannot be constructed. The different structural forms of the catwalk determine the success or failure of the project construction; the existing catwalk structure has the problems of cumbersome operation and high construction cost. Utility Model Content

[0003] The utility model aims to provide a catwalk structure, design a flexible pavement structure, which can be suspended in the air and can be constructed by a dragging method, and the construction is convenient, safe and economical.

[0004] To achieve the above object, the utility model provides the following technical solution: a catwalk structure, comprising a catwalk with one end anchored on a beam surface and the other end anchored on a tower top, the catwalk comprising

[0005] Catwalk load-bearing rope, the catwalk load-bearing rope is a steel core wire rope, and both ends are connected to the anchoring piece by a load-bearing pear-shaped ring and a clamp;

[0006] An adjusting device, which is composed of a catwalk load-bearing rope head connected to an anchor beam through a connecting seat and an adjusting pull rod, and the anchor beam is connected to a tower top lifting lug through a pull rod;

[0007] The catwalk surface layer includes a square steel pipe placed on the catwalk load-bearing cable, a roller bracket tied and connected to the square steel pipe, a nylon pulley arranged on the roller bracket, and a U-shaped card buckling the surface layer crossbeam and the catwalk load-bearing cable;

[0008] The wind-resistant and vibration-controlling cable is made of steel wire rope, the upper end of which is buckled on the square steel pipe, and the lower end is tightened and bolted to the pre-embedded anchor point on the beam surface through a hand winch.

[0009] Preferably, the load-bearing pear-shaped ring and the clamp are shaped structural parts.

[0010] Preferably, a plurality of the roller brackets are provided, and the distance between two adjacent roller brackets is 6.0 m.

[0011] Preferably, two wind-resistant vibration-control cables are arranged, respectively at the 1 / 3 and 2 / 3 positions of the span.

[0012] Preferably, the catwalk load-bearing rope is a 8-36φ steel core wire rope; the rope head of the catwalk load-bearing rope is connected to the anchor beam through a connecting seat and a φ42 adjusting rod.

[0013] Preferably, it also includes a railing, which includes a steel railing connected to a square steel tube, a plurality of handrail cables arranged on the steel railing, and a large square mesh steel wire railing net located outside the handrail cable.

[0014] Preferably, it also includes a splicing plate connecting the steel railing and the square steel pipe, and the splicing plate is provided with bolt holes.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] It uses common steel materials, does not require other tools or materials, is easy and quick to operate, and has low construction costs;

[0017] It can save labor, speed up construction progress and save costs; it has been used many times in actual projects and has been proven to meet the requirements of strength and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A cross-sectional view of a catwalk of the utility model;

[0019] Figure 2 A plan view of the catwalk of the utility model;

[0020] In the figure: 1. Main cable; 2. Catwalk load-bearing rope; 3. Square steel pipe; 4. Nylon pulley; 5. U-shaped card; 6. Bolt; 7. Steel railing; 8. Handrail rope; 9. Large square eye steel wire railing net; 10. Roller bracket; 12. Splicing plate; 13. Large square eye steel wire mesh; 14. Small square eye steel wire mesh. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] 1) Load-bearing cable installation

[0023] a. First, lift the upper anchor beam of the anchor end directly with a tower crane and connect it to the tower top lifting ear, then transport the load-bearing cable to the beam surface and manually unfold it, and directly install the upper anchor end with a tower crane. The load-bearing cable steel rope is connected to the anchor beam through a φ42mm adjustment rod. At this time, the φ42mm adjustment rod should be in the maximum adjustment range;

[0024] b. Anchor at the end beam and use the hand chain hoist to pull back and pin the load-bearing cable to the anchor point at the beam end;

[0025] 2) Adjustment of catwalk load-bearing cables

[0026] The adjustment should be made on-site according to the empty cable elevation to ensure that the catwalk line shape is basically consistent with the main cable empty line shape;

[0027] The vertical adjustment of the load-bearing cable is divided into relative elevation adjustment and absolute elevation adjustment. The relative elevation adjustment is carried out through φ42mm bolts to make the tension of the load-bearing cable consistent. Then, the absolute elevation of the catwalk is adjusted by adjusting the anchor rod connecting the anchor beam and the tower top lug, so that the catwalk line shape meets the verticality requirements specified in the design.

[0028] 3) Catwalk surface laying

[0029] The catwalk surface layer adopts the pull-up laying method. According to the structural requirements, two layers of nets are rolled up on the platform and spread to an appropriate length. Various materials that make up the catwalk surface layer, such as anti-skid wooden strips, coarse and fine surface nets, angle steel, etc., are tied according to the designed position. The crossbeam at the beginning is connected with the catwalk load-bearing rope with a U-shaped clip. The U-shaped clip nut is not tightened to facilitate dragging. The two steel ropes lowered from the top of the tower are firmly connected to the crossbeam in a "human" shape. Then a small-tonnage winch is used on the tower to pull the surface layer to the top. Drag upward, drag the middle beam surface to assist and gradually relax; repeat this process of dragging and paving one section at a time, during the dragging process, the U-shaped clip will connect the surface beam with the catwalk load-bearing rope buckle, and the U-shaped clip nut will not be tightened to facilitate dragging; when one roll is laid, the beginning of the second roll is pulled out by manpower, and connected with the end of the previous roll with No. 8 iron wire, and 2 to 3 wire rope clips are added to strengthen the connection, and then dragged according to the above method, and repeated until it is in place;

[0030] Install the prefabricated railing columns from both ends of the surface layer to the middle, add U-shaped clips to fill the crossbeams and tighten all the nuts. After all the railings on one side are installed, fix the handrail rope to the railing and install the railing side net.

[0031] Example 1

[0032] Figure 1 The cross-sectional view of the catwalk of the utility model; one end of the catwalk is anchored on the beam surface, and the other end is anchored on the tower top. Adjustment devices are provided on both sides of the tower top to facilitate the vertical adjustment during construction; the line shape of the catwalk surface is parallel to the unloaded line shape of the main cable 1, and the catwalk surface is 1.4m away from the center of the main cable 1; the catwalk is provided with temporary wind-resistant vibration-control cables consolidated with the beam surface to enhance the stability of the catwalk; the diameter of the main cable 1 is determined by the design on the drawing.

[0033] The catwalk is composed of a catwalk load-bearing cable 2, a handrail cable 8, a catwalk surface layer, wind-resistant and vibration-control cables, an anchoring system, an adjusting device, etc.;

[0034] The catwalk load-bearing cable 2 is a 8-φ36 steel core wire rope, and the two ends are connected to the anchors with load-bearing pear-shaped rings and clamps. The load-bearing pear-shaped rings and clamps are standardized products that can be purchased on the market; the catwalk load-bearing cable 2 rope ends are connected to the anchor beam through a connecting seat and a φ42 adjustment rod, and the anchor beam is connected to the tower top ear through the rod to form a composite adjustment device; the lower anchor adopts a direct pin connection structure arrangement, and the anchor seat is welded to the top surface of the steel box beam or embedded in the concrete surface; the catwalk surface layer includes 50×50×5×3800 square steel pipes 3, U-shaped clamps 5, large and small square meshes, and 40×50×950 for pressing mesh Square wooden strips, nylon pulley 4 and roller bracket 10, etc.; nylon pulley 4 and roller bracket 10 are standardized products and can be purchased on the market. The roller bracket 10 is set every 6.0m and is tied and connected with 50×50×5×3800 square steel pipe 3; the railing includes 6×19+IWSφ16 handrail cable 8, L50×5×1100 equilateral angle steel railing 7, φ4.0×50×100 large square eye steel wire railing net 9, 150×150×8 splicing plate 12, and the steel railing 7 and the square steel pipe 3 are connected by ф22mm bolts 6 through the splicing plate 12.

[0035] During local structural treatment, in order to improve the wind resistance and stability of the catwalk, two wind-resistant vibration-control cables are set at 1 / 3 and 2 / 3 of the span; the wind-resistant vibration-control cables are made of φ16mm steel wire ropes, the upper ends of which are buckled on the square steel pipes 3 of the catwalk, and the lower ends are tightened and bolted to the pre-buried anchor points on the beam surface through hand winches.

[0036] Example 2

[0037] Figure 2 The plan view of the catwalk of the utility model; one end of the catwalk is anchored on the beam surface, and the other end is anchored on the tower top. Adjustment devices are provided on both sides of the tower top to facilitate the vertical adjustment during construction, so that the line shape of the catwalk surface is parallel to the unloaded line shape of the main cable, and the catwalk surface is 1.4m away from the center of the main cable; temporary wind-resistant vibration-control cables are provided on the catwalk to be consolidated with the beam surface to enhance the stability of the catwalk.

[0038] The catwalk is composed of a catwalk load-bearing cable 2, a handrail cable 8, a catwalk surface layer, wind-resistant and vibration-control cables, an anchoring system, an adjusting device, etc.;

[0039] The catwalk load-bearing cable 2 is a 8-φ36 steel core wire rope, and the two ends are connected to the anchors on the beam surface by load-bearing pear-shaped rings and clamps; the load-bearing cable rope head is connected to the anchor beam through a connecting seat and a φ42 adjustment rod, and the anchor beam is connected to the tower top ear through the rod to form a composite adjustment device; the lower anchor adopts a direct pin connection structure arrangement, and the anchor seat is welded to the top surface of the steel box beam or embedded in the concrete surface;

[0040] The catwalk surface layer is composed of overlapping coarse and fine meshes; the coarse mesh is made of φ4.0×50×100 large square mesh steel wire mesh 13, with three layers staggered and overlapped; the fine mesh is made of φ1.2×16×16 small square mesh steel wire mesh 14.

[0041] Although the embodiments of the present invention have been shown and described, as detailed above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A catwalk structure, characterized in that: The catwalk includes a catwalk with one end anchored on the beam surface and the other end anchored on the tower top. A catwalk load-bearing rope (2), wherein the catwalk load-bearing rope (2) is a steel core wire rope, and both ends are connected to the anchoring piece by a load-bearing pear-shaped ring and a clamp; An adjusting device, the adjusting device is composed of a catwalk load-bearing rope (2) whose rope head is connected to an anchor beam through a connecting seat and an adjusting pull rod, and the anchor beam is connected to a tower top lifting lug through a pull rod; A catwalk surface layer, the catwalk surface layer comprising a square steel pipe (3) placed on a catwalk load-bearing cable (2), a roller bracket (10) tied and connected to the square steel pipe (3), a nylon pulley (4) arranged on the roller bracket (10), and a U-shaped clip (5) for buckling a surface layer crossbeam with the catwalk load-bearing cable (2); The wind-resistant vibration-control cable adopts a steel wire rope, the upper end of which is buckled on the square steel pipe (3), and the lower end is tightened and bolted on the pre-buried anchor point on the beam surface through a hand chain hoist.

2. A catwalk structure according to claim 1, characterized in that: The load-bearing pear-shaped ring and the clamp are shaped structural parts.

3. A catwalk structure according to claim 1, characterized in that: A plurality of roller brackets (10) are provided, and the distance between two adjacent roller brackets (10) is 6.0 m.

4. A catwalk structure according to claim 1, characterized in that: The anti-wind vibration control cables are arranged in two sets, respectively at the 1 / 3 and 2 / 3 positions of the span.

5. A catwalk structure according to claim 1, characterized in that: The catwalk load-bearing rope (2) is an 8-φ36 steel core wire rope; the rope head of the catwalk load-bearing rope (2) is connected to the anchor beam through a connecting seat and a φ42 adjusting pull rod.

6. A catwalk structure according to claim 1, characterized in that: It also comprises a railing, which comprises a steel railing (7) connected to a square steel pipe (3), a plurality of handrail cables (8) arranged on the steel railing (7), and a large square mesh steel wire railing net (9) located outside the handrail cables (8).

7. A catwalk structure according to claim 6, characterized in that: It also includes a splicing plate (12) for connecting the steel railing (7) and the square steel pipe (3), and bolt holes are provided on the splicing plate (12).

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