A sealing structure and sealing method for main cable clamp ring seam of suspension bridge

Abstract

The present invention discloses a sealing structure for the annular seam of a main cable clamp of a suspension bridge, comprising a cable clamp and an extension portion arranged on one side of the cable clamp, a wave-shaped protrusion being arranged on the outer surface of the extension portion, the connection between the extension portion and the main cable being connected by a sealing structure being arranged, the sealing structure comprising a wire wrapping layer, the wire wrapping layer being arranged on the main cable at the annular seam, a first protective layer being arranged on the outer surface of the wire wrapping layer, a circle of sealant connecting layer being arranged at the connection between the first protective layer and the end face of the extension portion, a layer of heat shrinkable tape being arranged on the outer surface of the extension portion, a sealant filling layer being arranged on the outer surface of the heat shrinkable tape, and a second protective layer being arranged on the outer surface of the sealant filling layer. Compared with the prior art, the present application can increase the friction force on the protective layer, and increase a smooth transition between the cable clamp and the main cable, thereby making the stress section of the sealing structure relatively long, and avoiding tearing caused by local stress.

Description

Technical Field

[0001] The present application relates to the technical field of cable protection for suspension bridges, and in particular to a sealing structure and a sealing method for a main cable clamp ring seam of a suspension bridge. Background Art

[0002] A suspension bridge is a bridge that uses cables suspended from pylons and anchored on both banks (or both ends of the bridge) as the main load-bearing components of the upper structure. The main cable is the most important load-bearing structure of the suspension bridge, and bears the weight of the bridge and various impacts such as wind, rain, and vehicles. The bearing capacity of the main cable is transmitted through the cable clamp installed on the main cable. The cable clamp is a structure with upper and lower half cable clamps. When installing the cable clamp, the upper and lower half cable clamps are tightly clamped on the main cable by bolts.

[0003] The slings of the suspension bridge cables are connected to the main cables through cable clamps, and an annular gap is formed between the two ends of the cable clamps and the main cables. Waterproof sealant is usually injected into the annular gap. Due to loose bolts, vibration of the main cable, deformation of the main cable, insufficient friction, tension of the slings, etc., partial slippage often occurs between the cable clamp and the main cable, which will cause a large tearing of the sealing and protective material of the cable clamp annular gap, causing damage and cracking to the sealing and protective structure, forming a gap. Water and moisture will enter the main cable through the gap, affecting the service life of the main cable. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of this application is to provide a suspension bridge main cable clamp annular seam sealing structure and sealing method to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the technical solution provided by the present invention is: a main cable clamp annular seam sealing structure for a suspension bridge, comprising a cable clamp sleeved on the main cable and an extension portion arranged on one side of the cable clamp, a wave-shaped protrusion fixedly provided on the outer surface of the extension portion, and the connection between the extension portion and the main cable is connected by a surrounding sealing structure, the sealing structure comprises a wire winding layer, a first protective layer, a sealant connecting layer, a heat shrinkable tape, a sealant filling layer and a second protective layer, the wire winding layer is wound around the main cable at the annular seam, and the wire winding layer is in contact with the end face of the extension portion located at the annular seam, the outer surface of the wire winding layer is coated with a first protective layer, a circle of sealant connecting layer is provided at the connection between the first protective layer and the end face of the extension portion, a layer of heat shrinkable tape is continuously surrounded on the outer surfaces of the extension portion, the sealant connecting layer and the first protective layer, a sealant filling layer is provided on the outer surface of the heat shrinkable tape, and a second protective layer is coated on the outer surface of the sealant filling layer.

[0006] Preferably, the wire wrapping layer is formed by a layer of steel wire tightly spirally wound on the outer surface of the main cable, and the steel wire is a round galvanized steel wire with a diameter of 6 mm.

[0007] Preferably, the components of the first protective layer are, from inside to outside, phosphating primer, epoxy primer, high-strength glass fiber cloth and vulcanized rubber sealant.

[0008] Preferably, the thicknesses of the components of the first protective layer from inside to outside are 10 μm, 80 μm, 3 mm and 3 mm respectively.

[0009] Preferably, the components of the second protective layer are, from inside to outside, a vulcanized rubber sealant and a flexible fluorocarbon topcoat, wherein the flexible fluorocarbon topcoat is applied to the first protective layer and the second protective layer.

[0010] Preferably, the thicknesses of the components of the second protective layer from inside to outside are 3 mm and 80 μm respectively.

[0011] A sealing method for a main cable clamp ring seam sealing structure of a suspension bridge, specifically comprising the following steps:

[0012] S1. Take the annular seam of the extension part of one end of the cable clamp as the starting point, and spirally wrap the round galvanized steel wire with a diameter of 6 mm tightly around the outer surface of the main cable along the length direction of the main cable to form a wire wrapping layer;

[0013] S2, cleaning the dirt on the surface of the wire winding layer in step S1 and drying it, then coating the outer surface of the wire winding layer with a 10 μm thick phosphating primer, and after standing, coating it with an 80 μm thick epoxy primer, and then wrapping and covering it with high-strength glass fiber cloth, and then coating the surface of the high-strength glass fiber cloth with a 3 mm thick vulcanized rubber sealant and shaping it until the surface is uniform and smooth, thereby forming a first protective layer on the outer surface of the wire winding layer;

[0014] S3, applying sealant around the contact position between the first protective layer and the end surface of the cable clamp extension to form a sealant connection layer, and shaping the sealant at the connection between the two so that the end surface of the cable clamp extension is smoothly connected to the first protective layer;

[0015] S4, wrapping a 3 mm thick heat shrink tape around the cable clip extension portion, the sealant connection layer and the outer surface of the first protective layer, and heating the tape;

[0016] S5, coating the outer surface of the heat shrinkable tape heated in step S4 with sealant to form a sealant filling layer, and shaping the surface to be uniform and smooth, and smoothly connecting and covering the heat shrinkable tape and the first protective layer;

[0017] S6, coating the outer surface of the sealant filling layer in step S5 with a 3 mm thick vulcanized rubber sealant and shaping it to a uniform and smooth surface, then coating the outer surface of the coated vulcanized rubber sealant with a 80 μm thick flexible fluorocarbon topcoat to form a second protective layer, and also coating the outer surface of the first protective layer extending beyond the second protective layer with a 80 μm thick flexible fluorocarbon topcoat;

[0018] S7. Repeat the above steps S1, S2, S3, S4, S5, and S6 to seal the annular seam of the extended portion of the other end of the cable clamp to complete the sealing of the annular seam of the main cable clamp of the suspension bridge.

[0019] A suspension bridge main cable clamp ring seam sealing structure of the present application is achieved by respectively setting an extension portion at both ends of the original cable clamp, and setting a wavy line protrusion on the outer surface of the extension portion to increase the friction force on the entire sealing protective layer, and in conjunction with the sealing structure set at the cable clamp ring seam, a smooth transition is added between the cable clamp and the main cable, thereby making the stress-bearing section of the sealing structure relatively long, thereby avoiding tearing caused by local stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a main cable clamp ring seam sealing structure of a suspension bridge in Example 1.

[0021] Figure 2 It is a cross-sectional view at BB of a main cable clamp ring seam sealing structure of a suspension bridge in Example 1.

[0022] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of part A in the middle.

[0023] Figure 4 It is a cross-sectional view at CC of a main cable clamp ring seam sealing structure of a suspension bridge in Example 1.

[0024] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of section D in the middle.

[0025] Figure 6 It is a structural schematic diagram of a main cable clamp ring seam sealing structure of a suspension bridge in Example 2.

[0026] Figure numerals: 1. Cable clamp; 2. Extension part; 3. Wave-shaped protrusion; 4. Main cable; 5. Wire wrapping layer; 6. First protective layer; 7. Sealant connecting layer; 8. Heat shrinkable tape; 9. Sealant filling layer; 10. Second protective layer; 11. Phosphate primer; 12. Epoxy primer; 13. High-strength glass fiber cloth; 14. Vulcanized rubber sealant; 15. Flexible fluorocarbon topcoat. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the embodiments, and the proportional dimensions in the drawings are only for highlighting the various components of the present application and are not actual proportional dimensions.

[0028] When this application is implemented,

[0029] Embodiment 1:

[0030] Combined with Figure 1 ~Attached Figure 5 A suspension bridge main cable clamp annular seam sealing structure, comprising a cable clamp 1 sleeved on a main cable 4 and an extension 2 arranged on one side of the cable clamp 1, a wave-shaped protrusion 3 is fixedly provided on the outer surface of the extension 2, and the connection between the extension 2 and the main cable 4 is connected by a surrounding sealing structure, the sealing structure comprises a wire wrapping layer 5, a first protective layer 6, a sealant connecting layer 7, a heat shrinkable tape 8, a sealant filling layer 9 and a second protective layer 10, the wire wrapping layer 5 is wound around the main cable 4 at the annular seam, and the wire wrapping layer 5 is in contact with the end face of the extension 2 located at the annular seam, the outer surface of the wire wrapping layer 5 is coated with a first protective layer 6, the first protective A circle of sealing adhesive connecting layer 7 is provided at the connection between layer 6 and the end face of the extension part 2, a layer of heat shrinkable tape 8 is continuously arranged around the outer surface of the extension part 2, the sealing adhesive connecting layer 7 and the first protective layer 6, a sealing adhesive filling layer 9 is arranged on the outer surface of the heat shrinkable tape 8, and a second protective layer 10 is coated on the outer surface of the sealing adhesive filling layer 9. In this design, an extension part 2 is respectively arranged at both ends of the original cable clamp 1, and a wavy line protrusion is arranged on the outer surface of the extension part 2 to increase the friction force of the entire sealing protective layer, and the wire winding layer 5 is arranged in contact with the end of the extension part 2 of the cable clamp 1, so that it plays a certain limiting role on the cable clamp 1.

[0031] A sealing method for a main cable clamp ring seam sealing structure of a suspension bridge, specifically comprising the following steps:

[0032] S1, a round galvanized steel wire with a diameter of 6 mm is spirally and tightly wound around the outer surface of the main cable 4 along the length direction of the main cable 4, starting from the annular seam of the extension part 2 of one end of the cable clamp 1, to form a wire wrapping layer 5;

[0033] S2, clean the dirt on the surface of the wire winding layer 5 in step S1 and dry it, then use a spray gun to first apply a 10μm thick phosphating primer 11 on the outer surface of the wire winding layer 5, wait for about 2 hours, and then apply an 80μm thick epoxy primer 12 thereon without waiting, and then wrap it with a 3mm thick high-strength glass fiber cloth 13 to cover it, and then apply a 3mm thick vulcanized rubber sealant 14 on the surface of the high-strength glass fiber cloth 13 and shape it to a uniform and smooth surface for the convenience of subsequent operations, thereby forming a first protective layer 6 on the outer surface of the wire winding layer 5, wherein the phosphating primer 11 has the function of anti-corrosion and enhancing the adhesion of the coating, can improve the corrosion resistance and insulation of the sealing structure, and enhance the adhesion of the coating to the metal surface, and the epoxy primer 12 has extremely strong adhesion and adhesion as well as good toughness and chemical resistance, and has good adhesion and adhesion to metals, glass, etc.;

[0034] S3, applying sealant around the contact position between the first protective layer 6 and the end surface of the extension part 2 of the cable clamp 1 to form a sealant connection layer 7, and shaping the sealant at the connection between the two, so that the end surface of the extension part 2 of the cable clamp 1 and the first protective layer 6 can be smoothly connected, and the extension part 2 of the cable clamp 1 and the first protective layer 6 can be filled and sealed. In addition, the setting of the sealant connection layer 7 makes the winding of the heat shrinkable tape 8 more tight without leaving gaps, which is convenient for the operation of subsequent processes;

[0035] S4, wrapping a 3 mm thick heat shrink tape 8 around the outer surfaces of the extension portion 2 of the cable clip 1, the sealant connecting layer 7 and the first protective layer 6, and then heating the heat shrink tape 8 with a hot air gun to make it adhere to the extension portion 2 of the cable clip 1, the sealant connecting layer 7 and the outer surfaces of the first protective layer 6 to form a tight structure;

[0036] S5, coating the outer surface of the heat shrinkable tape 8 heated in step S4 with sealant to form a sealant filling layer 9, and shaping the surface to be uniform and smooth, and smoothly connecting and covering the heat shrinkable tape 8 and the first protective layer 6, so as to facilitate the operation of subsequent processes;

[0037] S6, on the outer surface of the sealant filling layer 9 in step S5, a 3 mm thick vulcanized rubber sealant 14 is coated around and shaped to a uniform and smooth surface, and then a 80 μm thick flexible fluorocarbon topcoat 15 is coated on the outer surface of the coated vulcanized rubber sealant 14 to form a second protective layer 10, and an 80 μm thick flexible fluorocarbon topcoat 15 is also coated on the outer surface of the first protective layer 6 extending beyond the second protective layer 10, wherein the vulcanized rubber sealant 14 is often used in engineering projects such as suspension bridge cables and road bridge concrete expansion joints, and has excellent adhesion and outdoor weather resistance, and has excellent bonding properties to most metals such as steel, zinc, copper, and paint coatings, concrete, etc. The flexible fluorocarbon topcoat 15 has excellent weather resistance, corrosion resistance, solvent resistance, chemical resistance, and self-cleaning properties, and can well protect the overall coating, and has good tolerance to salt spray corrosion environments, chemical atmospheric environments, urban pollution environments, acid rain environments, etc., and can effectively protect the base coating and steel structures from corrosion;

[0038] S7. Repeat the above steps S1, S2, S3, S4, S5, and S6 to seal the annular seam of the extension portion 2 at the other end of the cable clamp 1, thereby completing the sealing of the annular seam of the main cable clamp of the suspension bridge.

[0039] Embodiment 2:

[0040] Combined with Figure 6 , for the sealing protection structure of the thrust-type cable clamp connection, similar to the above-mentioned sealing structure, extensions 2 are respectively provided at the ends of the left and right parts of the thrust-type cable clamp, and wave-shaped protrusions 3 are provided on the extensions 2. After the thrust-type cable clamp is installed on the main cable 4, a 3mm thick heat shrink tape 8 is first wrapped around the outer surface of the extension 2, and then the heat shrink tape 8 is heated by a hot air gun to make it adhere to the outer surface of the extension 2 at the ends of the left and right parts of the thrust-type cable clamp to form a tight structure, and then a sealant filling layer 9 is circumferentially coated on the outer surface of the heat shrink tape 8 that has been heated and shaped to have a uniform and smooth surface, and then a 3mm thick vulcanized rubber sealant 14 is circumferentially coated on the outer surface of the sealant filling layer 9 and shaped to have a uniform and smooth surface, and then a 80μm thick flexible fluorocarbon topcoat 15 is coated on the outer surface, thus completing the sealing protection of the thrust-type cable clamp connection.

[0041] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application are described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, without departing from the spirit and scope defined by the claims of the present application.

Claims

1. A main cable clamp annular seam sealing structure for a suspension bridge, comprising a cable clamp (1) sleeved on a main cable (4) and an extension (2) arranged on one side of the cable clamp (1), characterized in that: The outer surface of the extension part (2) is fixedly provided with a wave-shaped protrusion (3), and the connection between the extension part (2) and the main cable (4) is connected by a surrounding sealing structure, wherein the sealing structure comprises a wire wrapping layer (5), a first protective layer (6), a sealing adhesive connecting layer (7), a heat shrinkable tape (8), a sealing adhesive filling layer (9) and a second protective layer (10), wherein the wire wrapping layer (5) is wound around the main cable (4) at the annular seam, and the wire wrapping layer (5) is in contact with the end surface of the extension part (2) at the annular seam. The outer surface of the wire wrapping layer (5) is coated with a first protective layer (6), a circle of sealing glue connecting layer (7) is provided at the connection between the first protective layer (6) and the end surface of the extension part (2), a layer of heat shrinkable tape (8) is continuously provided around the outer surface of the extension part (2), the sealing glue connecting layer (7) and the first protective layer (6), a sealant filling layer (9) is provided on the outer surface of the heat shrinkable tape (8), and a second protective layer (10) is coated on the outer surface of the sealant filling layer (9).

2. A suspension bridge main cable clamp annular seam sealing structure according to claim 1, characterized in that: The wire wrapping layer (5) is formed by a layer of steel wire tightly spirally wound on the outer surface of the main cable (4), and the steel wire is a round galvanized steel wire with a diameter of 6 mm.

3. The main cable clamp ring seam sealing structure of a suspension bridge according to claim 1, characterized in that: The components of the first protective layer (6) are, from the inside to the outside, a phosphating primer (11), an epoxy primer (12), a high-strength glass fiber cloth (13) and a vulcanized rubber sealant (14).

4. A suspension bridge main cable clamp annular seam sealing structure according to claim 3, characterized in that: The thicknesses of the various components of the first protective layer (6) from the inside to the outside are 10 μm, 80 μm, 3 mm and 3 mm respectively.

5. The main cable clamp ring seam sealing structure of a suspension bridge according to claim 1, characterized in that: The thickness of the heat shrinkable tape (8) is 3 mm.

6. The main cable clamp ring seam sealing structure of a suspension bridge according to claim 1, characterized in that: The components of the second protective layer (10) are, from the inside to the outside, a vulcanized rubber sealant (14) and a flexible fluorocarbon topcoat (15), wherein the flexible fluorocarbon topcoat (15) is applied to the first protective layer (6) and the second protective layer (10).

7. A suspension bridge main cable clamp annular seam sealing structure according to claim 6, characterized in that: The thicknesses of the various components of the second protective layer (10) from the inside to the outside are 3 mm and 80 μm respectively.

8. A sealing method for a main cable clamp ring seam sealing structure of a suspension bridge, characterized in that: The specific steps include: S1. A round galvanized steel wire with a diameter of 6 mm is spirally and tightly wound around the outer surface of the main cable (4) along the length direction of the main cable (4) with the annular seam of the extension part (2) of one end of the cable clamp (1) as the starting point, to form a wire wrapping layer (5); S2, cleaning the dirt on the surface of the wire wrapping layer (5) in step S1 and drying it, then coating the outer surface of the wire wrapping layer (5) with a 10 μm thick phosphating primer (11), and after it is left to stand, coating the outer surface with an 80 μm thick epoxy primer (12), and then wrapping and covering it with a high-strength glass fiber cloth (13), and then coating the surface of the high-strength glass fiber cloth (13) with a 3 mm thick vulcanized rubber sealant (14) and shaping it until the surface is uniform and smooth, thereby forming a first protective layer (6) on the outer surface of the wire wrapping layer (5); S3, applying sealant around the contact position between the first protective layer (6) and the end face of the extension part (2) of the cable clamp (1) to form a sealant connection layer (7), and shaping the sealant at the connection between the two, so that the end face of the extension part (2) of the cable clamp (1) and the first protective layer (6) are smoothly connected; S4, wrapping a 3 mm thick heat shrink tape (8) around the extension portion (2) of the cable clamp (1), the sealant connection layer (7) and the outer surface of the first protective layer (6), and performing a heating treatment on the tape; S5, coating the outer surface of the heat shrinkable tape (8) heated in step S4 with sealant to form a sealant filling layer (9), and shaping the surface to be uniform and smooth, and smoothly connecting and covering the heat shrinkable tape (8) and the first protective layer (6); S6, coating the outer surface of the sealant filling layer (9) in step S5 with a 3 mm thick vulcanized rubber sealant (14) and shaping the surface to be uniform and smooth, then coating the outer surface of the coated vulcanized rubber sealant (14) with a 80 μm thick flexible fluorocarbon topcoat (15) to form a second protective layer (10), and also coating the outer surface of the first protective layer (6) extending beyond the second protective layer with a 80 μm thick flexible fluorocarbon topcoat (15); S7, repeat the above steps S1, S2, S3, S4, S5, S6 to seal the annular seam of the extension part (2) at the other end of the cable clamp (1), thus completing the sealing of the annular seam of the main cable clamp (1) of the suspension bridge.

Images