Durable system of cable beam anchoring steel anchor pipe structure and construction method thereof

Abstract

The invention relates to a durability system of a cable-beam anchoring steel anchor pipe structure and a construction method of the durability system. The durability system is structurally characterized in that rubber for sealing is poured above a damper arranged in a stay cable in a cable guide pipe of the cable-beam anchoring steel anchor pipe structure, and the inner surface and the outer surface of a steel anchor pipe and the inner surface and the outer surface of the cable guide pipe are each evenly coated with a hot-dip galvanizing coating; a drainage groove is formed in the lowest point of the end, connected with the anchor bearing plate, of the steel anchor pipe; a drain hole is formed in the lowest position of the waterproof cover, and the requirement for timely draining accumulated water above the rubber for pouring and sealing is met. Seeped water at the contact position of the waterproof cover and the inhaul cable is effectively prevented from flowing into the cable guide pipe through pouring sealing rubber. The inner and outer surfaces of the steel anchor pipe and the cable guide pipe are uniformly plated with a layer of hot-dip galvanizing coating, so that the anti-corrosion effect is good, the anti-corrosion life of the interior of the pipe can meet the design requirement, and coating maintenance is not needed in the use period; the drainage groove is formed in the lowest point of the end, connected with the anchor bearing plate, of the steel anchor pipe, condensate water in the steel anchor pipe and the cable guide pipe can be drained in time, and the probability of corrosion is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a durability system of a cable-beam anchored steel anchor pipe structure and a construction method thereof. Background Art

[0002] As a new type of cable-beam anchor steel pipe structure, the cable-beam anchor steel pipe structure has a narrow interior due to its special structure. This makes it impossible to design its durability according to the traditional "active protection" design concept of spraying an anti-corrosion coating inside the anchor pipe and then performing regular maintenance. Therefore, it is urgent to propose a targeted durability system and corresponding construction method suitable for this type of anchor structure. Summary of the Invention

[0003] The purpose of the present invention is to overcome the problem that the internal space of the steel anchor pipe in the cable-beam anchor steel anchor pipe structure is small and it is impossible to spray anti-corrosion regularly to improve its durability. The present invention provides a durability system for the cable-beam anchor steel anchor pipe structure and its construction method. The present invention solves the durability problem of this new cable-beam anchor steel anchor pipe structure through the design concept of "prevention first, combining prevention and drainage".

[0004] To achieve the purpose of the present invention, the present invention is completed by the following technical solutions: A durability system of a cable-beam anchor steel anchor pipe structure, the cable-beam anchor steel anchor pipe structure consists of a steel anchor pipe, a cable guide tube, a force transmission web, a supporting stiffening rib, an anchor plate, a built-in damper of the inclined cable, and a waterproof cover. The steel anchor pipe is welded to one side of the force transmission web, and the other side of the force transmission web is welded to the outer web of the steel main beam. Multiple supporting stiffening ribs are vertically welded on the outer web of the steel main beam, and the supporting stiffening ribs are welded to the force transmission web and the steel anchor pipe. The anchor plate is vertically welded to the steel anchor pipe on one side of the anchor end of the inclined cable, and the other end of the steel anchor pipe is connected to the cable guide tube. A built-in damper of the inclined cable is arranged on the inner side of the end of the cable guide tube, and a waterproof cover is arranged on the outside of the cable guide tube, and the waterproof cover fits tightly with the outside of the inclined cable; it is characterized in that: sealing rubber is poured above the built-in damper of the inclined cable in the cable guide tube of the cable-beam anchor steel anchor pipe structure, and a drainage hole is opened at the lowest point of the waterproof cover. The purpose of the injection sealing rubber is to prevent water from seeping between the contact surface of the waterproof cover and the inclined cable from flowing into the cable conduit, and the drain hole meets the need to discharge the accumulated water above the injection sealing rubber.

[0005] Furthermore, the rubber is a high elastic modulus rubber, which can adapt to the vibration deformation of the inclined cable while ensuring that the colloid and the inclined cable always maintain close contact and are water-proof.

[0006] Furthermore, a hot-dip galvanizing layer is evenly plated on the inner and outer surfaces of the steel anchor pipe and cable conduit. The hot-dip galvanizing layer has high reliability and excellent corrosion resistance, which can ensure that the interior of the steel anchor pipe and cable conduit does not have durability problems during its service life.

[0007] Furthermore, a drainage trough is provided at the lowest point where the steel anchor pipe is connected to the anchor plate. Since the interior of the steel anchor pipe and the cable guide tube is connected to the outside world, the drainage trough is provided at the lowest point where the steel anchor pipe and the anchor plate are connected to meet the need for timely discharge of condensed water inside the steel anchor pipe and the cable guide tube.

[0008] Furthermore, the drain trough is a semi-cylindrical drain trough with a diameter of 8 mm, which meets the demand for timely discharge of condensed water inside the steel anchor pipe and cable guide tube.

[0009] Furthermore, the connection between the steel anchor pipe and the cable guide tube ensures that the inner diameters of the two are aligned and welded, so that condensed water inside the steel anchor pipe and the cable guide tube can pass smoothly at the connection position, and the connection position will not have durability problems due to the accumulation of condensed water.

[0010] Furthermore, the exterior of the cable-beam anchor steel anchor pipe structure is sprayed with an anti-corrosion coating, and is re-coated regularly according to a maintenance plan.

[0011] A durability system construction method for a cable-beam anchored steel anchor pipe structure is characterized by the following steps: Step 1: Hot-dip galvanizing is performed on the steel anchor pipe and cable guide in the factory, and a layer of hot-dip galvanizing is evenly plated on the inner and outer surfaces of the steel anchor pipe and cable guide; Step 2: Further welding and connecting the steel anchor pipe, cable guide, force transmission web, supporting stiffener, anchor plate and steel main beam in the factory, and ensure that the inner diameters of the steel anchor pipe and cable guide are aligned at the connection point, and then spray the external anti-corrosion coating; Step 3: Open a semi-cylindrical drain groove with a diameter of 8mm at the lowest point of the connection between the steel anchor pipe and the anchor plate; Step 4: Hoist the cable-beam anchor steel anchor pipe structure and steel main beam at the construction site; Step 5: Install the stay cable and built-in damper, and inject high elastic modulus rubber for sealing above the built-in damper inside the cable guide; Step 6: Install the waterproof cover on the top of the inclined cable and open a drain hole at the lowest point of the waterproof cover.

[0012] The present invention has the following advantages: 1. The high elastic modulus rubber for sealing is poured above the built-in damper of the cable in the cable conduit, which can effectively prevent water from seeping into the cable conduit at the contact point between the waterproof cover and the cable. At the same time, the high elastic modulus of the high elastic modulus rubber for sealing can adapt to the vibration deformation of the cable, ensuring that the colloid and the cable always maintain close contact and no water seepage.

[0013] 2. A drain hole is opened at the lowest point of the waterproof cover to allow the accumulated water above the high elastic modulus rubber used for injection sealing to be discharged in time.

[0014] 3. The inner and outer surfaces of the steel anchor pipe and cable guide are evenly coated with a layer of hot-dip galvanized coating, which has a good anti-corrosion effect and can ensure that the anti-corrosion life of the inside of the pipe meets the design requirements. No painting and maintenance is required during the service period.

[0015] 4. The inner diameters of the steel anchor pipe and the cable guide tube are aligned at the connection position, so that the condensed water inside the steel anchor pipe and the cable guide tube can pass smoothly at the connection position, avoiding corrosion problems caused by the accumulation of condensed water.

[0016] 5. A drainage trough is opened at the lowest point of the connection between the steel anchor pipe and the anchor plate to discharge the condensed water inside the steel anchor pipe and cable guide tube in time, reducing the probability of corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below based on specific embodiments of the present invention and in conjunction with the accompanying drawings, wherein Figure 1 This is a vertical layout diagram of the anti-corrosion system of the cable-beam anchor steel anchor pipe structure of the present invention.

[0018] Figure 2 for Figure 1 CC cross-sectional view.

[0019] Figure 3 for Figure 2 DD cross-sectional view.

[0020] Figure 4 for Figure 3 A large-scale drawing of point A.

[0021] Figure 5 for Figure 3 A large-scale drawing of point B.

[0022] The reference numerals in the figures are as follows: 1 is rubber, 2 is hot-dip galvanizing, 3 is drain chute, 4 is cable-beam anchor steel anchor pipe structure, 4-1 is steel anchor pipe, 4-2 is cable guide tube, 4-3 is force transmission web, 4-4 is supporting stiffening rib, 4-5 is anchor pad, 4-6 is built-in damper, 4-7 is waterproof cover, 5 is steel main beam outer web, 6 is steel main beam top plate, 7 is steel main beam bottom plate, 8 is concrete bridge deck, 9 is inclined cable, and 10 is drain hole. DETAILED DESCRIPTION

[0023] like Figure 1-5 The figure shows a preferred embodiment of the anti-corrosion system for the cable-beam anchored steel anchor pipe structure of the present invention.

[0024] like Figure 1-5As shown, a durability system of a cable-beam anchor steel anchor pipe structure, the cable-beam anchor steel anchor pipe structure 4 is composed of a steel anchor pipe 4-1, a cable guide tube 4-2, a force transmission web 4-3, a supporting stiffening rib 4-4, an anchor plate 4-5, a built-in damper 4-6 of the inclined cable, and a waterproof cover 4-7. The steel anchor pipe 4-1 is welded to one side of the force transmission web 4-3, and the other side of the force transmission web 4-3 is welded to the outer web 5 of the steel main beam. Multiple supporting stiffening ribs 4-4 are vertically welded to the outer web 5 of the steel main beam, and the supporting stiffening ribs 4-4 are welded to the force transmission web 4-3 and the steel anchor pipe 4-1. The anchor plate 4-5 is vertically welded to the steel anchor pipe 4-1 on one side of the anchor end of the inclined cable 9, and the other side of the steel anchor pipe 4-1 is welded to the outer web 5 of the steel main beam. The end is connected to the cable guide tube 4-2, and a built-in damper 4-6 of the inclined cable is arranged on the inner side of the end of the cable guide tube 4-2, and a waterproof cover 4-7 is arranged on the outside of the cable guide tube 4-2, and the waterproof cover 4-7 is tightly fitted with the outside of the inclined cable 9; it is characterized in that: sealing rubber 1 is poured above the built-in damper of the inclined cable in the cable guide tube 4-2 of the cable-beam anchoring steel anchor pipe structure 4, and the poured sealing rubber is high elastic modulus rubber, which can adapt to the vibration deformation of the inclined cable while ensuring that the colloid and the inclined cable always remain in close contact and waterproof. This high elastic modulus rubber can be purchased directly; a drain hole 10 is opened at the lowest point of the waterproof cover 4-7 to meet the need for discharging accumulated water above the high elastic modulus rubber 1 poured for sealing.

[0025] Furthermore, a hot-dip galvanized layer 2 is evenly plated on the inner and outer surfaces of the steel anchor pipe 4-1 and the cable guide tube 4-2. The hot-dip galvanized layer has high reliability and excellent anti-corrosion effect, which can ensure that the steel anchor pipe and the cable guide tube will not have durability problems during their service life.

[0026] Furthermore, since the interior of the steel anchor pipe 4-1 and the cable guide tube 4-2 are connected to the outside world, a semi-cylindrical drainage trough 3 with a diameter of 8 mm is opened at the lowest point of the connection end of the steel anchor pipe 4-1 and the anchor pad 4-5 to meet the need for timely discharge of condensed water inside the steel anchor pipe 4-1 and the cable guide tube 4-2.

[0027] Furthermore, the connection between the steel anchor pipe 4-1 and the cable guide tube 4-2 ensures that the inner diameters of the two are aligned and welded, so that the condensed water inside the steel anchor pipe 4-1 and the cable guide tube 4-2 can pass smoothly at the connection position, and the connection position will not have durability problems due to the accumulation of condensed water.

[0028] Furthermore, the exterior of the cable-beam anchor steel anchor pipe structure is sprayed with an anti-corrosion coating, and is re-coated regularly according to a maintenance plan.

[0029] A durability system construction method for a cable-beam anchored steel anchor pipe structure is characterized by the following steps: Step 1: Hot-dip galvanizing is performed on the steel anchor pipe and cable guide in the factory, and a layer of hot-dip galvanizing is evenly plated on the inner and outer surfaces of the steel anchor pipe and cable guide; Step 2: Further welding and connecting the steel anchor pipe, cable guide, force transmission web, supporting stiffener, anchor plate and steel main beam in the factory, and ensure that the inner diameters of the steel anchor pipe and cable guide are aligned at the connection point, and then spray the external anti-corrosion coating; Step 3: Open a semi-cylindrical drain groove with a diameter of 8mm at the lowest point of the connection between the steel anchor pipe and the anchor plate; Step 4: Hoist the cable-beam anchor steel anchor pipe structure and steel main beam at the construction site; Step 5: Install the stay cable and built-in damper, and inject high elastic modulus rubber for sealing above the built-in damper inside the cable guide; Step 6: Install the waterproof cover on the top of the inclined cable and open a drain hole at the lowest point of the waterproof cover.

[0030] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Specific dimensions must be calculated and determined based on actual conditions. Those skilled in the art will readily appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A durability system for a cable-beam anchor steel anchor pipe structure, the cable-beam anchor steel anchor pipe structure comprising a steel anchor pipe, a cable guide tube, a force-transmitting web, supporting stiffening ribs, an anchor pad, a built-in damper for a stay cable, and a waterproof cover; the steel anchor pipe is welded to one side of the force-transmitting web, the other side of the force-transmitting web is welded to the outer web of the steel main beam, a plurality of supporting stiffening ribs are vertically welded to the outer web of the steel main beam, the supporting stiffening ribs are welded to the force-transmitting web and the steel anchor pipe, the anchor pad is vertically welded to the steel anchor pipe on one side of the anchor end of the stay cable, the other end of the steel anchor pipe is connected to the cable guide tube, a built-in damper for the stay cable is provided on the inner side of the end of the cable guide tube, a waterproof cover is provided on the outside of the cable guide tube, and the waterproof cover is tightly fitted to the outside of the stay cable; the characteristics are as follows: Sealing rubber is poured above the built-in damper of the inclined cable in the cable guide tube of the cable-beam anchoring steel anchor pipe structure, and a drainage hole is opened at the lowest point of the waterproof cover.

2. The durability system of the cable-beam anchor steel anchor pipe structure according to claim 1, characterized in that: The rubber is a high elastic modulus rubber.

3. The durability system of the cable-beam anchor steel anchor pipe structure according to claim 1, characterized in that: A hot-dip galvanized coating is evenly plated on the inner and outer surfaces of the steel anchor pipe and cable guide tube.

4. The durability system of the cable-beam anchor steel anchor pipe structure according to claim 1, characterized in that: A drainage trough is opened at the lowest point of one end where the steel anchor pipe is connected to the anchor plate.

5. The durability system of the cable-beam anchor steel anchor pipe structure according to claim 4, characterized in that: The drain trough is a semi-cylindrical drain trough with a diameter of 8 mm.

6. The durability system of the cable-beam anchor steel anchor pipe structure according to claim 1, characterized in that: The connection between the steel anchor pipe and the cable guide tube is ensured to be welded with their inner diameters aligned.

7. The durability system of the cable-beam anchor steel anchor pipe structure according to claim 1, characterized in that: An anti-corrosion coating is sprayed on the exterior of the cable-beam anchor steel anchor pipe structure.

8. A durability system construction method for a cable-beam anchored steel anchor pipe structure according to any one of claims 1 to 7, characterized in that Follow these steps: Step 1: Hot-dip galvanizing is performed on the steel anchor pipe and cable guide in the factory, and a layer of hot-dip galvanizing is evenly plated on the inner and outer surfaces of the steel anchor pipe and cable guide; Step 2: Further welding and connecting the steel anchor pipe, cable guide, force transmission web, supporting stiffener, anchor plate and steel main beam in the factory, and ensure that the inner diameters of the steel anchor pipe and cable guide are aligned at the connection point, and then spray the external anti-corrosion coating; Step 3: Open a semi-cylindrical drain groove with a diameter of 8mm at the lowest point of the connection between the steel anchor pipe and the anchor plate; Step 4: Hoist the cable-beam anchor steel anchor pipe structure and steel main beam at the construction site; Step 5: Install the stay cable and built-in damper, and inject high elastic modulus rubber for sealing above the built-in damper inside the cable guide; Step 6: Install the waterproof cover on the top of the inclined cable and open a drain hole at the lowest point of the waterproof cover.

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