Suspension bridge main cable anchoring system protection structure and construction method

Abstract

The invention relates to a suspension bridge main cable anchoring system protection structure and a construction method.The suspension bridge main cable anchoring system protection structure comprises a rear anchor beam and a plurality of anchor rods, the anchor rods are in butt joint with the rear anchor beam, a splice plate is arranged at the joint of each anchor rod and the rear anchor beam, and the splice plates are provided with a plurality of corrosion-resistant rivets along the axes of the anchor rods; the anchor rod and the rear anchor beam are fixed through a plurality of corrosion-resistant rivets, the splice plates are coated with sealant, a shell sleeve is fixedly arranged outside the sealant, and the shell sleeve is coated with a foaming material. The splicing plate is arranged at the joint of the anchor rod and the rear anchor beam, and the multiple corrosion-resistant rivets are installed on the splicing plate along the axis of the anchor rod, so that the anchor rod and the rear anchor beam are fixed, the fracture risk of rivet connection is reduced, and the problems that in the connection mode of a profile steel anchoring system in the related technology, although high-strength bolt connection is high in connection efficiency and good in performance, the connection efficiency is low are solved. However, high-strength bolts of part of bridges can be fractured and fall off.

Description

Technical Field

[0001] The present application relates to the technical field of bridge structures, and particularly relates to a protection structure and construction method for the main cable anchorage system of a suspension bridge. Background Art

[0002] With the development of cross-sea long-bridge technology, the main cable anchorage system of a suspension bridge needs to adapt to a harsh corrosion environment. The main cable anchorage system of a suspension bridge is buried in the anchor body concrete and cannot be replaced later, so the connection reliability requirement is relatively high. At the same time, some structures of the main cable anchorage system of a suspension bridge are below the groundwater level, and the durability requirement is relatively high.

[0003] In related technologies, the common connection methods of the steel section anchorage system mainly include high-strength bolt connection, precision bolt connection and weld connection. Although the high-strength bolt connection has high connection efficiency and good performance, high-strength bolts may break and fall off in some bridges. The precision bolt connection has high requirements for the manufacturing precision of bolt holes, the manufacturing process is complex, there is a gap between the hole wall and the bolt, and the anti-vibration and corrosion resistance are general. For the weld connection, it is difficult to control the potential difference between the welding area and the base metal, and galvanic corrosion is likely to occur.

[0004] Therefore, it is necessary to design a new protection structure for the main cable anchorage system of a suspension bridge to overcome the above problems. Summary of the Invention

[0005] The present application provides a protection structure and construction method for the main cable anchorage system of a suspension bridge, which can solve the technical problems that in the connection methods of the steel section anchorage system in related technologies, although the high-strength bolt connection has high connection efficiency and good performance, high-strength bolts may break and fall off in some bridges, the precision bolt connection has high requirements for the manufacturing precision of bolt holes, the manufacturing process is complex, there is a gap between the hole wall and the bolt, and the anti-vibration and corrosion resistance are general, and for the weld connection, it is difficult to control the potential difference between the welding area and the base metal, and galvanic corrosion is likely to occur.

[0006] In a first aspect, an embodiment of the present application provides a protection structure for the main cable anchorage system of a suspension bridge, which includes: a rear anchor beam and a plurality of anchor rods. The plurality of anchor rods are butt-jointed with the rear anchor beam. A splicing plate is arranged at the connection of each anchor rod and the rear anchor beam. A plurality of corrosion-resistant rivets are installed along the axis of the anchor rod on the splicing plate. The anchor rod and the rear anchor beam are fixed by the plurality of corrosion-resistant rivets. A sealant is coated on the outside of the splicing plate, and a shell sleeve is fixedly arranged outside the sealant. A foaming material is wrapped outside the shell sleeve.

[0007] Among them, multiple bolt connectors are provided on one side of the rear anchor beam. The bolt connectors and the ends of the bolts are both set to be I-shaped. The bolt connectors are docked with the bolts. The plate surfaces of the bolt connectors and the bolts are clamped between two splicing plates. Multiple corrosion-resistant rivets pass through the splicing plates, the bolts and the bolt connectors, and fix the splicing plates, the bolts and the bolt connectors, so that there is no gap between the bolts and the rear anchor beam in the plate thickness direction. The strength of multiple corrosion-resistant rivets is relatively lower than that of high-strength bolts, so that the shearing force of multiple corrosion-resistant rivets along the axis of the bolts is reduced. At the same time, the axial stress of multiple corrosion-resistant rivets is relatively low, reducing the fracture risk of rivet connection. The shell sleeve is covered on the outside of the sealant and fixed by bolts. The shell sleeve can be made of stainless steel material to prevent mechanical damage to the connection between the bolt and the rear anchor beam, and enhance the sealing performance and durability of the connection between the bolt and the rear anchor beam. The foaming material covers the connection between the bolt and the bolt connector, providing double protection for the connection between the bolt and the rear anchor beam.

[0008] Combined with the first aspect, in an embodiment, the corrosion-resistant rivets are made of steel. The mass percentage of Ni in the steel is set to 1.3% - 1.5%, the mass percentage of Mo is set to 0.1% - 0.4%, and the mass percentage of Cu is set to 0.3% - 0.6%.

[0009] Among them, the corrosion-resistant rivets can adopt Q345qDNHY-I steel. The mass percentage of Ni in the steel can be set to 1.3% - 1.5%, the mass percentage of Mo can be set to 0.1% - 0.4%, and the mass percentage of Cu can be set to 0.3% - 0.6%. Preferably, the mass percentage of Ni in the steel is set to 1.4%, the mass percentage of Mo is set to 0.25%, and the mass percentage of Cu is set to 0.45%, which can ensure the durability of the corrosion-resistant rivets while improving their cost performance. The weather resistance alloy index of the steel is greater than or equal to 1.29. The corrosion-resistant rivets have high durability and can be used underwater for a long time.

[0010] Combined with the first aspect, in an embodiment, the corrosion-resistant rivets include a rivet cap and a rivet post connected to each other. The rivet post is set to be conical. The diameter d of the end of the rivet post connected to the rivet cap is greater than the diameter d1 of the end of the rivet post away from the rivet cap.

[0011] Among them, the rivet post can be set to a conical shape, so that it can better fill the hole and be in a sealed state during the riveting process, improving the durability of the corrosion-resistant rivet. The difference between the diameter d of one end of the rivet post connected to the rivet cap and the diameter d1 of the other end of the rivet post far from the rivet cap can be set to 0.6 - 1.2 mm. Preferably, the difference between the diameter d of one end of the rivet post connected to the rivet cap and the diameter d1 of the other end of the rivet post far from the rivet cap is set to 0.9 mm, making it easy for the corrosion-resistant rivet to pass through the holes of the splicing plate, the anchor rod, and the rear anchor beam, and at the same time having a high filling rate and clamping force to ensure the connection sealing of the corrosion-resistant rivet.

[0012] Combined with the first aspect, in an embodiment, the sealant located on the splicing plate is in clearance fit with the foaming material arranged at intervals along the axis of the anchor rod, and the clearance between the sealant and the foaming material is set to be greater than or equal to 50 mm.

[0013] Among them, the sealant located on the splicing plate is in clearance fit with the foaming material arranged at intervals along the axis of the anchor rod, and the clearance between the sealant and the foaming material is set to be greater than or equal to 50 mm, ensuring that the connection between the anchor rod and the rear anchor beam can freely expand and contract along the axis of the anchor rod to match the longitudinal expansion and contraction displacement of the anchor rod, and the maximum free expansion and contraction amount can reach 50 mm.

[0014] Combined with the first aspect, in an embodiment, the elongation rate of the sealant is greater than or equal to the ratio of the maximum elongation of the anchor rod to the thickness of the sealant.

[0015] Among them, the elongation rate of the sealant is greater than or equal to the ratio of the maximum elongation of the anchor rod to the thickness of the sealant, enabling the deformation coordination between the sealant and the anchor rod, ensuring that the sealant can still effectively cover the anchor rod after the anchor rod is stretched, avoiding the tensile failure of the sealant during operation, and improving the durability of the anchor rod.

[0016] Combined with the first aspect, in an embodiment, the thickness of the sealant is set to 3 - 5 mm.

[0017] Among them, the thickness of the sealant located on the splicing plate is greater than the thickness of the sealant located on the periphery of the splicing plate. The thickness of the sealant located on the periphery of the splicing plate, that is, the standard area, can be set to 3 - 5 mm, ensuring the sealing performance of the connection between the anchor rod and the rear anchor beam.

[0018] Combined with the first aspect, in an embodiment, the sealant is set to a polysulfide rubber material, and the foaming material is set to a polyethylene material.

[0019] Among them, the polysulfide rubber material has the characteristics of strong bonding ability, large elasticity, high strength, aging resistance and corrosion resistance, meeting the telescopic requirements of the bolt. The polyethylene material has the characteristics of waterproof and corrosion resistance, playing a preliminary protection role for the bolt and the rear anchor beam.

[0020] In a second aspect, an embodiment of the present application provides a construction method for a protection structure of a main cable anchorage system of a suspension bridge, which includes the following steps:

[0021] The first step: Dock a plurality of bolts with the rear anchor beam, and set splicing plates at the connection of each bolt and the rear anchor beam. Then, pass a plurality of corrosion-resistant rivets through the splicing plates, bolts and rear anchor beam, and knock the tails of the plurality of corrosion-resistant rivets protruding from the splicing plates. Among them, the plurality of corrosion-resistant rivets are distributed at intervals along the axis of the bolt.

[0022] Among them, adjust the positions of the rear anchor beam and the plurality of bolts to dock the bolt joints of the plurality of bolts with the rear anchor beam, and set the splicing plates at the connection of each bolt and the bolt joint. The plate surfaces of the bolt joints and the bolts are clamped between the two splicing plates. Then, pass a plurality of corrosion-resistant rivets from the inside out through the splicing plates, bolts and bolt joints for the hammering construction of the plurality of corrosion-resistant rivets. After heating the plurality of corrosion-resistant rivets, knock the plurality of corrosion-resistant rivets to make the tails of the corrosion-resistant rivets protrude from the splicing plates, so that the tails of the corrosion-resistant rivets are in a semi-spherical shape to fix the bolts and the rear anchor beam. After the corrosion-resistant rivets are extruded, the corrosion-resistant rivets fit with the bolt holes of the splicing plates, making the corrosion-resistant rivets in a sealed environment and improving the durability of the corrosion-resistant rivets. In other embodiments, the plurality of corrosion-resistant rivets can pass through the splicing plates, bolts and bolt joints from the outside in.

[0023] The second step: Coat sealant on the splicing plates, fixedly install a shell sleeve outside the sealant, and finally coat foaming material outside the shell sleeve.

[0024] Among them, coat the sealant on the splicing plates. The thickness of the sealant in the standard area is set to 3-5 mm, and the thickness of the sealant covering the rivet cap above the splicing plates is set to 3-5 mm. The sealant evenly covers the splicing plates and the plurality of corrosion-resistant rivets. Then, cover the shell sleeve outside the sealant. The shell sleeve is fixed by bolts. Finally, cover the foaming material outside the shell sleeve. The sealant on the splicing plates and the foaming material arranged at intervals along the axis of the bolt are in clearance fit, and the clearance between the sealant and the foaming material is set to be greater than or equal to 50 mm.

[0025] Combined with the second aspect, in an implementation manner, before coating the sealant on the splicing plates, it further includes: coating an anti-corrosion coating on the splicing plates.

[0026] After fixing multiple of the anchor rods and the rear anchor beam, an anti-corrosion paint is coated on the splicing plate to improve the durability of the splicing plate and prevent the splicing plate from corroding and rusting during underwater use.

[0027] In combination with the second aspect, in one embodiment, after covering the shell sleeve with foaming material, it further includes: pouring concrete outside the foaming material.

[0028] After covering the shell sleeve with the foaming material, the concrete is poured at the joints of multiple of the anchor rods and the rear anchor beam, so that multiple of the anchor rods and the rear anchor beam are buried in the concrete.

[0029] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0030] By providing a splicing plate at the joint of the anchor rod and the rear anchor beam and installing a plurality of corrosion-resistant rivets along the axis of the anchor rod on the splicing plate to fix the anchor rod and the rear anchor beam, the risk of rivet connection fracture is reduced, solving the technical problem in the connection method of the I-beam anchoring system in the related technology that although the high-strength bolt connection has high connection efficiency and good performance, there are cases where high-strength bolts break and fall off in some bridges, the precision bolt connection has high requirements for the manufacturing precision of bolt holes, the manufacturing process is complex, there is a gap between the hole wall and the bolt, and the anti-vibration and corrosion-resistant performance is average, and the weld connection is difficult to control the potential difference between the welding area and the base metal, and galvanic corrosion is likely to occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a front elevation view of a protection structure for a main cable anchoring system of a suspension bridge provided by an embodiment of the present application;

[0033] Figure 2 It is a cross-sectional view of a protection structure for a main cable anchoring system of a suspension bridge provided by an embodiment of the present application;

[0034] Figure 3 It is a schematic diagram of a corrosion-resistant rivet provided by an embodiment of the present application;

[0035] Figure 4 It is a schematic diagram of the structure of the rear anchor beam and multiple anchor rods provided by an embodiment of the present application;

[0036] Figure 5Schematic diagram of the rear anchor beam provided by the embodiment of the present application.

[0037] In the figure: 1. Rear anchor beam; 11. Anchor bolt joint; 2. Anchor bolt; 3. Splice plate; 4. Corrosion-resistant rivet; 41. Rivet cap; 42. Rivet post; 5. Sealant; 6. Shell sleeve; 7. Foaming material; 8. Concrete. Specific implementation manners

[0038] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0039] The embodiment of the present application provides a protection structure and construction method for the main cable anchoring system of a suspension bridge, which can solve the technical problems in the connection method of the steel section anchoring system. Although the high-strength bolt connection has high connection efficiency and good performance, in some bridges, the high-strength bolts may experience delayed fracture and detachment. The precision bolt connection has high requirements for the manufacturing precision of bolt holes, complex manufacturing processes, gaps between the hole walls and the bolts, and general anti-vibration and corrosion-resistant properties. For the weld connection, it is difficult to control the potential difference between the welding area and the base metal, and galvanic corrosion is likely to occur.

[0040] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown in

[0041] In this embodiment, a plurality of anchor bolt joints 11 are provided on one side of the rear anchor beam 1. The ends of the anchor bolt joints 11 and the anchor bolts 2 are both configured as I-shaped. The anchor bolt joints 11 are docked with the anchor bolts 2. The plate surfaces of the anchor bolt joints 11 and the anchor bolts 2 are clamped between two splicing plates 3. A plurality of corrosion-resistant rivets 4 pass through the splicing plates 3, the anchor bolts 2, and the anchor bolt joints 11, and fix the splicing plates 3, the anchor bolts 2, and the anchor bolt joints 11, so that the anchor bolts 2 and the rear anchor beam 1 are fixed in the plate thickness direction. The strength of the plurality of corrosion-resistant rivets 4 is relatively lower than that of high-strength bolts, so that the shear force of the plurality of corrosion-resistant rivets 4 along the axis of the anchor bolts 2 is reduced. At the same time, the axial stress of the plurality of corrosion-resistant rivets 4 is relatively low, reducing the fracture risk of the rivet connection. The shell sleeve 6 is wrapped outside the sealant 5 and fixed by bolts. The shell sleeve 6 can be made of stainless steel material to prevent mechanical damage to the connection between the anchor bolts 2 and the rear anchor beam 1, and enhance the sealing performance and durability of the connection between the anchor bolts 2 and the rear anchor beam 1. The foaming material 7 wraps the connection between the anchor bolts 2 and the anchor bolt joints 11, providing double protection for the connection between the anchor bolts 2 and the rear anchor beam 1.

[0042] In this embodiment, by providing the splicing plates 3 at the connection between the anchor bolts 2 and the rear anchor beam 1 and installing a plurality of corrosion-resistant rivets 4 along the axis of the anchor bolts 2 on the splicing plates 3, the anchor bolts 2 and the rear anchor beam 1 are fixed. The strength of the plurality of corrosion-resistant rivets 4 is relatively lower than that of high-strength bolts, so that the shear force of the plurality of corrosion-resistant rivets 4 along the axis of the anchor bolts 2 is reduced. At the same time, the axial stress of the plurality of corrosion-resistant rivets 4 is relatively low, reducing the fracture risk of the rivet connection, solving the technical problems in the connection method of the I-beam anchoring system in the related technology that although the high-strength bolt connection has high connection efficiency and good performance, there are cases where high-strength bolts break and fall off in some bridges, the precision bolt connection has high requirements for the manufacturing precision of bolt holes, the manufacturing process is complex, there are gaps between the hole walls and the bolts, and the anti-vibration and corrosion-resistant performances are average, and the weld connection is difficult to control the potential difference between the welding area and the base metal, and is prone to galvanic corrosion.

[0043] Further, as shown in Figure 1 In some embodiments, the corrosion-resistant rivets 4 are made of steel, and the mass percentage of Ni in the steel is set to 1.3% - 1.5%, the mass percentage of Mo is set to 0.1% - 0.4%, and the mass percentage of Cu is set to 0.3% - 0.6%.

[0044] In this embodiment, the corrosion-resistant rivet 4 can be made of Q345qDNHY-I steel. The mass percentage of Ni in the steel can be set to 1.3% - 1.5%, the mass percentage of Mo can be set to 0.1% - 0.4%, and the mass percentage of Cu can be set to 0.3% - 0.6%. Preferably, the mass percentage of Ni in the steel is set to 1.4%, the mass percentage of Mo is set to 0.25%, and the mass percentage of Cu is set to 0.45%. While ensuring the durability of the corrosion-resistant rivet 4, its cost performance is improved. The weathering alloy index of the steel is greater than or equal to 1.29. The corrosion-resistant rivet 4 has high durability and can be used underwater for a long time.

[0045] Further, referring to Figures 1-3 As shown, in some embodiments, the corrosion-resistant rivet 4 includes a rivet head 41 and a rivet post 42 that are connected to each other. The rivet post 42 is set to be conical. The diameter d of the end of the rivet post 42 connected to the rivet head 41 is greater than the diameter d1 of the end of the rivet post 42 away from the rivet head 41.

[0046] In this embodiment, the rivet post 42 can be set to be conical so that it can better fill the hole and be in a sealed state during the riveting process, improving the durability of the corrosion-resistant rivet 4. The difference between the diameter d of the end of the rivet post 42 connected to the rivet head 41 and the diameter d1 of the end of the rivet post 42 away from the rivet head 41 can be set to 0.6 - 1.2 mm. Preferably, the difference between the diameter d of the end of the rivet post 42 connected to the rivet head 41 and the diameter d1 of the end of the rivet post 42 away from the rivet head 41 is set to 0.9 mm, making the corrosion-resistant rivet 4 easy to pass through the holes in the splicing plate 3, the anchor rod 2, and the rear anchor beam 1, and at the same time having a high filling rate and clamping force to ensure the connection sealing of the corrosion-resistant rivet 4.

[0047] Further, referring to Figure 1 As shown, in some embodiments, the sealant 5 located on the splicing plate 3 is in clearance fit with the foaming material 7 arranged at intervals along the axis of the anchor rod 2. The clearance between the sealant 5 and the foaming material 7 is set to be greater than or equal to 50 mm.

[0048] In this embodiment, the sealant 5 located on the splicing plate 3 is in clearance fit with the foaming material 7 arranged at intervals along the axis of the anchor rod 2. The clearance between the sealant 5 and the foaming material 7 is set to be greater than or equal to 50 mm, ensuring that the connection between the anchor rod 2 and the rear anchor beam 1 can freely expand and contract along the axis direction of the anchor rod 2 to match the longitudinal expansion and contraction displacement of the anchor rod 2, and the maximum free expansion and contraction amount can reach 50 mm.

[0049] Further, referring to Figure 1As shown, in some embodiments, the elongation of the sealant 5 is greater than or equal to the ratio of the maximum elongation of the anchor rod 2 to the thickness of the sealant 5 .

[0050] In this embodiment, the elongation of the sealant 5 is greater than or equal to the ratio of the maximum elongation of the anchor rod 2 to the thickness of the sealant 5, so that the deformation of the sealant 5 and the anchor rod 2 are coordinated, ensuring that the sealant 5 can still effectively cover the anchor rod 2 after the anchor rod 2 is stretched, avoiding tensile damage of the sealant 5 during operation, and improving the durability of the anchor rod 2.

[0051] Further, see Figure 1 As shown, in some embodiments, the thickness of the sealant 5 is set to 3-5 mm.

[0052] In this embodiment, the thickness of the sealant 5 located on the splicing plate 3 is greater than the thickness of the sealant 5 located at the periphery of the splicing plate 3. The thickness of the sealant 5 located at the periphery of the splicing plate 3, i.e., the standard area, can be set to 3 to 5 mm to ensure the sealing of the connection between the anchor rod 2 and the rear anchor beam 1.

[0053] Further, see Figure 1 As shown, in some embodiments, the sealant 5 is configured as a polysulfide rubber material, and the foaming material 7 is configured as a polyethylene material.

[0054] In this embodiment, the polysulfide rubber material has the characteristics of strong bonding ability, high elasticity, high strength, aging resistance and corrosion resistance, which meets the expansion and contraction requirements of the anchor rod 2. The polyethylene material has the characteristics of waterproof and corrosion resistance, which plays a preliminary protective role for the anchor rod 2 and the rear anchor beam 1.

[0055] See also Figure 1 , Figure 4 and Figure 5 As shown, the embodiment of the present application provides a construction method for a protection structure of a main cable anchoring system of a suspension bridge, which comprises the following steps:

[0056] The first step: dock multiple anchor rods 2 with the rear anchor beam 1, and set a splicing plate 3 at the connection between each anchor rod 2 and the rear anchor beam 1, then pass multiple corrosion-resistant rivets 4 through the splicing plate 3, the anchor rod 2 and the rear anchor beam 1, and knock multiple corrosion-resistant rivets 4 out of the tail end of the splicing plate 3, wherein the multiple corrosion-resistant rivets 4 are distributed at intervals along the axis of the anchor rod 2.

[0057] In this embodiment, the positions of the rear anchor beam 1 and the plurality of anchor rods 2 are adjusted so that the plurality of anchor rods 2 are docked with the anchor rod joints 11 of the rear anchor beam 1, and the splicing plates 3 are arranged at the joints of each anchor rod 2 and the anchor rod joints 11. The plate surfaces of the anchor rod joints 11 and the anchor rods 2 are clamped between the two splicing plates 3. Then, a plurality of corrosion-resistant rivets 4 are passed through the splicing plates 3, the anchor rods 2, and the anchor rod joints 11 from the inside to the outside, so as to facilitate the hammering construction of the plurality of corrosion-resistant rivets 4. After heating the plurality of corrosion-resistant rivets 4, the tail ends of the plurality of corrosion-resistant rivets 4 extending out of the splicing plates 3 are knocked, so that the tail ends of the corrosion-resistant rivets 4 are in a semi-spherical shape to fix the anchor rods 2 and the rear anchor beam 1. After the corrosion-resistant rivets 4 are extruded, the corrosion-resistant rivets 4 are fitted with the bolt holes of the splicing plates 3, so that the corrosion-resistant rivets 4 are in a sealed environment, improving the durability of the corrosion-resistant rivets 4. In other embodiments, the plurality of corrosion-resistant rivets 4 can be passed through the splicing plates 3, the anchor rods 2, and the anchor rod joints 11 from the outside to the inside.

[0058] Step 2: Coat a sealant 5 on the splicing plates 3, fixedly install a shell sleeve 6 outside the sealant 5, and finally coat a foaming material 7 outside the shell sleeve 6.

[0059] In this embodiment, the sealant 5 is coated on the splicing plates 3. The thickness of the sealant 5 in the standard area is set to 3 - 5 mm, and the thickness of the sealant 5 covering the rivet caps 41 above the splicing plates 3 is set to 3 - 5 mm. The sealant 5 evenly covers the splicing plates 3 and the plurality of corrosion-resistant rivets 4. Then, the shell sleeve 6 is covered outside the sealant 5, and the shell sleeve 6 is fixed by bolts. Finally, the foaming material 7 is covered outside the shell sleeve 6. The sealant 5 located on the splicing plates 3 is in clearance fit with the foaming material 7 arranged at intervals along the axis of the anchor rod 2, and the gap between the sealant 5 and the foaming material 7 is set to be greater than or equal to 50 mm.

[0060] Further, referring to Figure 1 As shown, in some embodiments, before coating the sealant 5 on the splicing plates 3, it further includes: coating an anti-corrosion coating on the splicing plates 3.

[0061] In this embodiment, after the plurality of anchor rods 2 and the rear anchor beam 1 are fixed, anti-corrosion paint is coated on the splicing plates 3 to improve the durability of the splicing plates 3 and prevent the splicing plates 3 from corroding and rusting during underwater use.

[0062] Further, referring to Figure 1 As shown, in some embodiments, after covering the foaming material 7 outside the shell sleeve 6, it further includes: pouring concrete 8 outside the foaming material 7.

[0063] In this embodiment, after the foaming material 7 is coated on the shell sleeve 6, the concrete 8 is poured at the joints of the plurality of anchor rods 2 and the rear anchor beam 1, so that the plurality of anchor rods 2 and the rear anchor beam 1 are embedded in the concrete 8.

[0064] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0065] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0066] The above description is only the specific implementation manners of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A protection structure for the main cable anchoring system of a suspension bridge, characterized in that: It includes: rear anchor beam (1); A plurality of anchor rods (2), wherein the plurality of anchor rods (2) are butt-jointed with the rear anchor beam (1), a splicing plate (3) is provided at the connection between each anchor rod (2) and the rear anchor beam (1), the splicing plate (3) is provided with a plurality of corrosion-resistant rivets (4) along the axis of the anchor rod (2), the anchor rod (2) and the rear anchor beam (1) are fixed by the plurality of corrosion-resistant rivets (4), the splicing plate (3) is coated with a sealant (5), a shell (6) is fixedly provided outside the sealant (5), and the shell (6) is coated with a foam material (7).

2. The protective structure for the main cable anchoring system of a suspension bridge according to claim 1, characterized in that: The corrosion-resistant rivet (4) is made of steel, in which the mass percentage of Ni is set to 1.3% to 1.5%, the mass percentage of Mo is set to 0.1% to 0.4%, and the mass percentage of Cu is set to 0.3% to 0.6%.

3. The protective structure for the main cable anchoring system of a suspension bridge according to claim 1, characterized in that: The corrosion-resistant rivet (4) comprises a rivet cap (41) and a rivet column (42) connected to each other, wherein the rivet column (42) is arranged in a conical shape, and a diameter d of an end of the rivet column (42) connected to the rivet cap (41) is larger than a diameter d1 of an end of the rivet column (42) away from the rivet cap (41).

4. The protective structure for the main cable anchoring system of a suspension bridge according to claim 1, characterized in that: The sealant (5) located on the splicing plate (3) is gap-matched with the foam material (7) arranged at intervals along the axis of the anchor rod (2), and the gap between the sealant (5) and the foam material (7) is set to be greater than or equal to 50 mm.

5. The protective structure for the main cable anchoring system of a suspension bridge according to claim 1, characterized in that: The elongation of the sealant (5) is greater than or equal to the ratio of the maximum elongation of the anchor rod (2) to the thickness of the sealant (5).

6. The protective structure for the main cable anchoring system of a suspension bridge according to claim 1, characterized in that: The thickness of the sealant (5) is set to 3-5 mm.

7. The protective structure for the main cable anchoring system of a suspension bridge according to claim 1, characterized in that: The sealant (5) is configured as a polysulfide rubber material, and the foaming material (7) is configured as a polyethylene material.

8. A construction method using the protective structure of the main cable anchoring system of a suspension bridge according to any one of claims 1 to 7, characterized in that: It includes the following steps: A plurality of anchor rods (2) are butt-jointed with a rear anchor beam (1), and a splicing plate (3) is provided at the connection between each anchor rod (2) and the rear anchor beam (1), and then a plurality of corrosion-resistant rivets (4) are passed through the splicing plate (3), the anchor rod (2) and the rear anchor beam (1), and the plurality of corrosion-resistant rivets (4) are hammered to extend out of the tail end of the splicing plate (3), wherein the plurality of corrosion-resistant rivets (4) are distributed at intervals along the axis of the anchor rod (2); A sealant (5) is coated on the outside of the splicing plate (3), and a shell (6) is fixedly arranged outside the sealant (5), and finally a foaming material (7) is coated on the outside of the shell (6).

9. The construction method according to claim 8, characterized in that: Before the sealant (5) is applied on the outside of the splicing plate (3), the method further comprises: An anti-corrosion coating is applied on the outside of the splicing plate (3).

10. The construction method according to claim 8, characterized in that: After the shell (6) is coated with the foaming material (7), the method further comprises: Concrete (8) is poured outside the foaming material (7).

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