A device for transmitting force under a cable saddle of a ground anchor type suspension bridge and a construction method thereof

Abstract

The application provides a ground anchor type suspension bridge rotating cable cable saddle under saddle force transmission device and a construction method. The force transmission device comprises an arc-shaped saddle body, an arc-shaped sliding pair, arc-shaped stop blocks and a jacking limiting group. The arc-shaped saddle body is fixedly connected with the saddle head of the rotating cable saddle. The arc-shaped sliding pair comprises an upper bearing plate, a sliding plate and a lower bearing plate which are arranged in close contact. The upper bearing plate and the sliding plate are both arc-shaped plates. The surface of the lower bearing plate facing the sliding plate is an arc surface. The upper bearing plate is fixedly connected with the arc-shaped saddle body, and the lower bearing plate is anchored on an anchor. The arc-shaped stop blocks are provided in two, which are fixedly arranged on the two side end portions of the upper bearing plate along the longitudinal direction and abut against the two sides of the arc-shaped saddle body. The jacking limiting groups are provided in two, which are arranged on the upper and lower end portions of the lower bearing plate and movably abut against the upper and lower end faces of the upper bearing plate. The force transmission device can ensure the longitudinal flexible movement of the rotating cable saddle during the installation of the main cable, and also reduces the damage to each component of the arc-shaped sliding pair, prolonging the service life of the sliding pair.

Description

Technical Field

[0001] This invention belongs to the technical field of ground-anchored suspension bridges, specifically relating to a force transmission device under the saddle of a ground-anchored suspension bridge slewing cable and its construction method. Background Technology

[0002] As the main load-bearing component of a ground-anchored suspension bridge, two main cables are typically arranged along the bridge's longitudinal direction, anchored to the saddle at the top of the tower and the anchorages at both ends, respectively. In this configuration, the saddle slides on one side, limiting its range of motion, and the anchorages are under unidirectional stress. Under varying temperature, wind, and traffic loads, the cables cannot adapt flexibly, compromising bridge stability. This also increases construction difficulty in areas where anchorage placement is challenging. Based on these issues, the Second Highway Survey and Design Institute of China Communications Construction Company (CCCC) proposed a rotating anchored main cable ground-anchored suspension bridge and its construction method. This design incorporates anchorage main cable saddles and rotating saddles to accommodate the main cable's rotation and withstand its horizontal centripetal pressure. The anchorage main cable saddles utilize a horizontal saddle groove structure to accommodate the main cable's lateral centripetal force. The overall structure is horizontally placed, reducing anchorage size and facilitating the anchorage's stress distribution and material performance, thus enhancing the ground-anchored suspension bridge's adaptability to terrain.

[0003] The turning of the slewing cable at the anchorage is controlled by one main cable saddle and two slewing cable saddles. The main cable saddle is fixed, while the slewing cable saddles can slide longitudinally. Steel gratings need to be arranged on both sides of the anchor block groove under the slewing cable saddles, and the two sides of the gratings need to be at 90°. Errors are inevitable during the construction process, which increases the construction difficulty. The slewing cable saddles need to transfer the load change of the main cable to the main cable saddle through longitudinal displacement. However, due to the influence of the frequency of load change, the cable tension difference will cause the slewing cable saddles to produce frequent reciprocating longitudinal displacement. The traditional PTFE plate sliding pair has a weak bearing capacity for the main cable and faces the risk of damage after long-term use, which reduces its service life.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a force transmission device and construction method for the under-saddle of the slewing cable saddle of a ground-anchored suspension bridge, so as to solve the problems of construction error and low service life of sliding pair of the slewing cable saddle grid of the current ground-anchored suspension bridge.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A force transmission device under the saddle of a ground-anchored suspension bridge's slewing cable is applied to the saddle system of the slewing cable in the ground-anchored suspension bridge. The saddle system includes an anchor and a saddle. The force transmission device includes:

[0008] An arc-shaped saddle body is fixedly connected to the saddle head of the cable saddle.

[0009] An arc-shaped sliding pair includes an upper support plate, a sliding plate, and a lower support plate that are fitted together. The upper support plate and the sliding plate are both arc-shaped plates. The surface of the lower support plate facing the sliding plate is an arc surface. The upper support plate is fixedly connected to the arc-shaped saddle body, and the lower support plate is anchored to the anchor.

[0010] Two arc-shaped stops are provided, and the two arc-shaped stops are fixed longitudinally to the two ends of the upper support plate and abut against the two sides of the arc-shaped saddle body;

[0011] Two push-limiting groups are provided, which are located at the upper and lower ends of the lower bearing plate and can movably abut against the upper and lower end faces of the upper bearing plate to adjust the angle of the arc-shaped saddle.

[0012] In an optional embodiment of the present invention, the arc-shaped stop includes an arc-shaped right-angle plate and a plurality of trapezoidal plates, wherein the plurality of trapezoidal plates are uniformly arranged along the arc length direction on the concave side of the arc-shaped right-angle plate.

[0013] In an optional embodiment of the present invention, the pushing limit group includes:

[0014] Lower support plate stop, the lower support plate stop is fixed at the upper and lower ends of the lower support plate;

[0015] Multiple jacks, the cylinder bodies of the multiple jacks are fixed at intervals on the lower support plate block, and the output shafts of the multiple jacks can all movably abut against the upper support plate.

[0016] In an optional embodiment of the present invention, the skateboard is a modified ultra-high molecular weight polyethylene skateboard;

[0017] The arc-shaped sliding pair also includes two arc-shaped stainless steel mirror panels, which are respectively embedded in the surfaces of the upper support plate and the lower support plate, and are attached to the opposite sides of the modified ultra-high molecular weight polyethylene sliding plate. Lubricating oil is filled between the arc-shaped stainless steel panels and the modified ultra-high molecular weight polyethylene sliding plate.

[0018] In an optional embodiment of the present invention, the force transmission device further includes a rebound spring, one end of which is fixedly connected to the anchor and the other end of which elastically abuts against the lower support plate.

[0019] In an optional embodiment of the present invention, the rebound hammer includes:

[0020] A fixed shell, which is a shell open at one end, is fixed to the anchor, and has movable columns on it;

[0021] The movable shell is a shell with one open end. The closed end of the movable shell abuts against the lower support plate. The open end of the movable shell passes through the opening of the fixed shell and can move relative to the fixed shell along the axis of the movable column. A trapezoidal block is provided on the inner side of the opening of the movable shell. The surface of the trapezoidal block facing the movable column is an inclined surface.

[0022] An elastic element, one end of which is connected to the movable column, and the other end of which elastically abuts against the movable shell;

[0023] A stilling raft, which is movably fitted onto the outside of the movable column, wherein the surface of the stilling raft facing the trapezoidal block is an inclined surface;

[0024] The trapezoidal block moves along the axial direction of the movable column with the movable shell, which can drive the energy dissipation raft to move radially along the movable column.

[0025] In an optional embodiment of the present invention, limiting blocks are provided on both sides of the energy dissipation raft along the length direction of the movable column. The limiting blocks are fixedly connected to the inner wall of the movable shell to restrict the movement of the energy dissipation raft along the axial direction of the movable column.

[0026] A guide post is also fitted on the outside of the movable column, and the guide post is fixedly connected to the inner wall of the fixed shell.

[0027] In an optional embodiment of the present invention, two rebound springs are provided, and the two rebound springs are arranged near the two side edges of the lower support plate.

[0028] In an optional embodiment of the present invention, the anchor is provided with a groove and a guide groove communicating with the groove, the top surface of the lower support plate facing away from the slide plate is a right-angled plane, the lower support plate is fixed in the groove, and the rebound device is fixed in the guide groove; a top cover is provided on the top of the groove and the guide groove.

[0029] The present invention also provides a construction method for the force transmission device under the saddle of the slewing cable of the ground-anchored suspension bridge as described above, the construction method comprising the following steps:

[0030] Step 1: The anchor is designed with a guide groove based on the rebound hammer design, and the rebound hammer is installed in the guide groove;

[0031] Step 2: Install the lower bearing plate in the groove of the anchor. First, install the push-limiting assembly at the upper and lower ends of the lower bearing plate respectively. Then, install the stainless steel mirror panel and the sliding plate in sequence, and inject lubricating oil.

[0032] Step 3: Install the upper support plate, and then push the jack of the jacking limit assembly to fix the upper support plate.

[0033] Step 4: Install the saddle head, connecting rod and arc-shaped saddle body of the cable saddle. Install arc-shaped stops on both sides of the upper bearing plate along the longitudinal direction to restrict the arc-shaped saddle body from sliding longitudinally.

[0034] Step 5: Insert the main cable into the saddle head groove of the cable saddle, and adjust the angle of the arc-shaped saddle body with the jack. After the position of the main cable is determined, stop the oil supply to the jack.

[0035] Beneficial effects:

[0036] The force transmission device under the saddle of the cable-swivel saddle for ground-anchored suspension bridges of the present invention includes an arc-shaped saddle body, an arc-shaped sliding pair, arc-shaped stops, and a jacking limit assembly. The arc-shaped saddle body is fixedly connected to the saddle head of the cable-swivel saddle. The arc-shaped sliding pair includes an upper bearing plate, a sliding plate, and a lower bearing plate that are fitted together. Both the upper bearing plate and the sliding plate are arc-shaped plates, and the surface of the lower bearing plate facing the sliding plate is arc-shaped. The upper bearing plate is fixedly connected to the arc-shaped saddle body and anchored to the anchorage. Two arc-shaped stops are provided, which are fixed longitudinally at both ends of the upper bearing plate and abut against both sides of the arc-shaped saddle body. Two jacking limit assemblies are provided, which are located at the upper and lower ends of the lower bearing plate and movably abut against the upper and lower end faces of the upper bearing plate. The force transmission device of the present invention can ensure the flexible longitudinal movement of the cable-swivel saddle during the installation of the main cable, while also reducing damage to the components of the arc-shaped sliding pair and extending the service life of the sliding pair. Furthermore, the use of an arc-shaped sliding pair with a large contact area ensures smooth longitudinal displacement of the cable saddle without the need for additional grids. Attached Figure Description

[0037] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0038] Figure 1 This is a top view schematic diagram of the cable saddle system of the ground-anchored suspension bridge slewing cable of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the ground-anchored suspension bridge slewing cable under-saddle force transmission device of the present invention.

[0040] Figure 3 for Figure 2 Cross-sectional view of a rebound hammer;

[0041] Figure 4 for Figure 2 A schematic diagram of a sliding joint;

[0042] Figure 5 for Figure 2 Schematic diagram of the arc-shaped stop block;

[0043] Figure 6 for Figure 2 Schematic diagram of the center push limit assembly;

[0044] Figure 7 for Figure 6 A schematic diagram of the central jack from another perspective.

[0045] The diagram shows the following markings: 10-Anchor; 11-Main cable saddle; 12-Spinning cable saddle; 13-Groove; 14-Guide groove; 20-Saddle head; 21-Arc-shaped saddle body; 22-Connecting rod; 30-Rebound spring; 31-Spring; 320-Moving column; 321-Guide column; 33-Moving shell; 330-Trapezoidal block; 331-Limiting block; 34-Energy dissipation raft; 35-Fixed shell; 40-Arc-shaped sliding pair; 41-Upper bearing plate; 410-Arc-shaped stop block; 4100-Arc-shaped right-angle plate; 4101-Trapezoidal plate; 42-Lower bearing plate; 420-Push limiting assembly; 421-Jack; 4210-Cylinder body; 4211-Oil inlet; 4212-Output shaft; 422-Lower bearing plate stop block; 43-Stainless steel mirror panel; 44-Modified ultra-high molecular weight polyethylene sliding plate. Detailed Implementation

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0047] The present invention will now be described in detail with reference to embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.

[0048] To address the problems of construction errors and low service life of sliding pairs in ground-anchored suspension bridges' slewing cable saddle grids, this invention provides a force transmission device under the saddle of a ground-anchored suspension bridge's slewing cable saddle.

[0049] like Figure 1 As shown, the cable saddle system of the ground-anchored suspension bridge includes an anchor 10, a main cable saddle 11, and a slewing cable saddle 12. The main cable saddle 11 is fixed on the anchor 10 and is located on the upper part of the central axis of the anchor 10. There are two slewing cable saddles 12, located on both sides of the central axis of the anchor 10. The main cable saddle 11 and the two slewing cable saddles 12 are arranged in a triangle. Each slewing cable saddle 12 is equipped with a force transmission device under its saddle.

[0050] It should be noted that the upper end of the saddle head 20 of the cable saddle 12 is provided with a saddle groove for installing the main cable, and multiple connecting rods 22 are provided on the outer side above the saddle groove, which play a role in enhancing the overall structural strength of the saddle head 20 of the cable saddle 12.

[0051] like Figures 2 to 4 As shown, the force transmission device includes an arc-shaped saddle 21, an arc-shaped sliding pair 40, an arc-shaped stop 410, and a push-limiting group 420. The arc-shaped saddle 21 is fixedly connected to the saddle head 20 of the cable saddle 12. The arc-shaped sliding pair 40 includes an upper support plate 41, a sliding plate, and a lower support plate 42 that are fitted together. Both the upper support plate 41 and the sliding plate are arc-shaped plates. The surface of the lower support plate 42 facing the sliding plate is an arc surface. The upper support plate 41 is fixedly connected to the arc-shaped saddle 21, and the lower support plate 42 is anchored to the anchor 10. Two arc-shaped stops 410 are provided. The two arc-shaped stops 410 are fixed longitudinally at both ends of the upper support plate 41 and abut against both sides of the arc-shaped saddle 21. Two push-limiting groups 420 are provided. The two push-limiting groups 420 are provided at the upper and lower ends of the lower support plate 42 and can movably abut against the upper and lower end faces of the upper support plate 41.

[0052] Specifically, the saddle head 20 and the arc-shaped saddle body 21 of the cable saddle 12 are both made of low-alloy steel, and the saddle head 20 and the arc-shaped saddle body 21 are fixed together by fusion welding. The curvature of the surfaces of the upper bearing plate 41, the sliding plate, and the lower bearing plate 42 facing the sliding plate is the same as the curvature of the arc-shaped saddle body 21. After installation, the surfaces of the arc-shaped saddle body 21, the upper bearing plate 41, the sliding plate, and the lower bearing plate 42 facing the sliding plate fit together, with a large contact area, which can ensure the smooth longitudinal displacement of the cable saddle 12 without the need for additional grids. The longitudinal direction is the length direction of the main cable, which is also the length direction of the saddle groove of the saddle head 20 of the cable saddle 12. The upper bearing plate 41 is fixedly connected to the arc-shaped saddle body 21 by bolts, and the lower bearing plate 42 is anchored to the anchor 10 by bolts. The arc-shaped stop 410 has the same arc as the upper bearing plate 41. After installation, the arc-shaped stop 410 can fit against the upper bearing plate 41 and is fixed to the surface of the upper bearing plate 41 facing the arc-shaped saddle 21 by bolts. The two arc-shaped stop blocks 410 are located on opposite sides of the arc-shaped saddle 21 and abut against the arc-shaped saddle 21, which can limit the longitudinal movement of the arc-shaped saddle 21, thus ensuring the overall stability of the arc-shaped saddle 21. The jacking limit assembly 420 is fixed to the upper and lower ends of the lower bearing plate 42 by bolts and is located on the upper and lower sides of the upper bearing plate 41. When the main cable is installed in the saddle groove of the saddle head 20, the upper and lower positions of the upper bearing plate 41 can be adjusted by moving the jacking limit assembly 420, thereby adjusting the angle of the arc-shaped saddle 21 and the saddle head 20, realizing the adjustment of the direction of the resultant force from the empty cable state to the bridged state, so as to ensure that the direction of the resultant force of the main cable meets the design requirements. In this way, the jacking limit assembly 420 can replace the ground anchor bolt at the outlet of the traditional anchor 10, allowing the arc-shaped saddle 21 to adapt to changes in the direction of the main cable, thus avoiding the influence of manufacturing errors and meeting the stress requirements. Once the position of the main cable is determined, the jacking limit assembly 420 stops moving. At this time, the jacking limit assembly 420 can serve as a permanent structure to restrict the vertical movement of the upper bearing plate 41, ensuring that the saddle and the main cable remain fixed in position.

[0053] Understandably, the present invention provides a force transmission device under the saddle of the rotating cable saddle 12 of the ground-anchored suspension bridge, which can ensure that the rotating cable saddle 12 can move flexibly in the longitudinal direction during the installation of the main cable, while also reducing damage to the various components of the arc-shaped sliding pair 40 and extending the service life of the sliding pair.

[0054] like Figure 4 As shown in the specific embodiment of the present invention, the arc-shaped stop 410 includes an arc-shaped right-angle plate 4100 and a plurality of trapezoidal plates 4101. The plurality of trapezoidal plates 4101 are evenly arranged along the arc length direction on the concave side of the arc-shaped right-angle plate 4100. The trapezoidal plates 4101 are right-angled trapezoidal plates 4101, with two adjacent right-angled sides fixed to the concave side walls of the arc-shaped right-angle plate 4100. The trapezoidal plates 4101 are evenly distributed, thus the arc-shaped stop has good structural stability, thereby more effectively limiting the arc-shaped saddle 21 and ensuring the overall stability of the arc-shaped saddle 21.

[0055] like Figure 6 and Figure 7 As shown in the specific embodiment of the present invention, the push-limiting assembly 420 includes a lower support plate block 422 and a plurality of jacks 421. The lower support plate block 422 is fixed at the upper and lower ends of the lower support plate 42. The cylinder bodies 4210 of the plurality of jacks 421 are fixed at intervals on the lower support plate block 422, and the output shafts 4212 of the plurality of jacks 421 can all movably abut against the upper support plate 41.

[0056] Specifically, the lower support plate stop 422 is elongated and composed of alternating horizontal and vertical plates. The lower support plate stop 422 is fixed to the upper and lower ends of the lower support plate 42 with bolts. The bottom of the cylinder body 4210 of the jack 421 is fixed to the side wall of the lower support plate 42 facing the upper support plate 41 with bolts. The output shaft 4212 of the jack 421 extends towards the upper support plate 41. The cylinder body 4210 of the jack 421 is provided with an oil inlet hole 4211. Optionally, multiple jacks 421 are provided, and the multiple jacks 421 are evenly distributed along the length direction of the lower support plate stop 422. Preferably, three jacks 421 are provided.

[0057] After the push-limiting assembly 420 is installed, the jack 421 does not work. After the upper bearing plate 41 is installed, oil is supplied to the cylinder 4210 through the oil inlet 4211. The jack 421 works, and the output shaft 4212 pushes a certain distance to fix the upper bearing plate 41 to prevent it from sliding up and down. When the main cable enters the saddle groove of the saddle head 20 of the cable saddle 12, the upper bearing plate 41 is adjusted by the operation of the jack 421, thereby adjusting the angle of the arc-shaped saddle body 21 and the saddle head 20 to ensure that the resultant force direction of the main cable meets the design requirements. After the position of the main cable is determined, the jack 421 stops supplying oil, that is, stops working.

[0058] In a specific embodiment of the present invention, the slide plate is a modified ultra-high molecular weight polyethylene slide plate 44 (UHMWPE). Modified ultra-high molecular weight polyethylene slide plate 44 possesses excellent wear resistance, self-lubricating properties, low-temperature resistance, impact resistance, and strong hydrophobicity, exhibiting strong pressure resistance to the main cable and a long service life. It should be noted that modified ultra-high molecular weight polyethylene slide plate 44 is an existing material and can be directly purchased.

[0059] like Figure 2 and Figure 4 As shown, in some embodiments of the present invention, the arc-shaped sliding pair 40 further includes two arc-shaped stainless steel mirror panels 43. The two arc-shaped stainless steel mirror panels 43 are respectively embedded in the surfaces of the upper support plate 41 and the lower support plate 42, and are attached to the opposite sides of the modified ultra-high molecular weight polyethylene sliding plate 44. Lubricating oil is filled between the arc-shaped stainless steel mirror panels 43 and the modified ultra-high molecular weight polyethylene sliding plate 44. This arrangement can further reduce the friction during the longitudinal movement of the cable saddle 12.

[0060] like Figures 1 to 3 As shown, the force transmission device also includes a rebound spring 30, one end of which is fixedly connected to the anchor 10, and the other end is elastically abutting against the lower bearing plate 42. The rebound spring 30 can buffer part of the pressure of the slewing saddle 12 on the anchor body, and can balance the unbalanced impact pressure of the main cable on the arc-shaped saddle body 21 of the slewing saddle 12.

[0061] In a specific embodiment of the present invention, the rebound device 30 includes a fixed shell 35, a movable shell 33, an elastic element, and a stress-relieving raft 34. The fixed shell 35 is a shell with one open end, fixed to the anchor 10, and has a movable column 320. The movable shell 33 is also a shell with one open end, with its closed end abutting against the lower support plate 42. The open end of the movable shell 33 passes through the opening of the fixed shell 35 and can move relative to the fixed shell 35 along the axial direction of the movable column 320. A trapezoidal block 330 is provided on the inner side of the opening of the movable shell 33, and the surface of the trapezoidal block 330 facing the movable column 320 is an inclined surface; one end of the elastic element is connected to the movable column 320, and the other end is elastically connected to the movable shell 33; the energy dissipation raft 34 is movably sleeved on the outside of the movable column 320, and the surface of the energy dissipation raft 34 facing the trapezoidal block 330 is an inclined surface; the trapezoidal block 330 moves axially along the movable column 320 with the movable shell 33, which can drive the energy dissipation raft 34 to move radially along the movable column 320.

[0062] Specifically, the fixed shell 35 is a square shell, including a base plate and four side plates surrounding one surface of the base plate. The base plate and the four side plates form a shell with one open end. The size of the base plate is larger than the size enclosed by the four side plates, which facilitates the base plate being fixed to the anchor 10 with bolts. The opening of the fixed shell 35 faces the lower support plate 42. The movable shell 33 is a square shell with one open end facing the opening of the fixed shell 35. The outer dimensions of the movable shell 33 are adapted to the inner dimensions of the fixed shell 35. The open end of the movable shell 33 can be movably inserted into the opening of the fixed shell 35. The movable shell 33 and the fixed shell 35 together form a closed cavity. The movable column 320 is movably located in this closed cavity, and the length direction of the movable column 320 is the same as the moving direction of the movable shell 33. One end of the movable column 320 penetrates through the fixed shell 35 and is exposed. That is, the base plate of the fixed shell 35 has a through hole for the movable column 320 to pass through. The elastic element is a spring 31, located within the closed cavity. One end of the spring 31 is connected to the end of the movable column 320 located within the cavity, and the other end of the spring 31 is connected to the bottom of the movable shell 33 (i.e., the inner wall of the closed end). The trapezoidal block 330 is a right-angled trapezoidal block 330, with its right-angled sidewall opposite to the inclined sidewall connected to the sidewall of the movable shell 33, so that the inclined sidewall (inclined surface) of the trapezoidal block 330 faces the movable column 320. The energy dissipation raft 34 is an irregular block shape, with a through hole for the movable column 320 to pass through. The size of the through hole is larger than the size of the movable column 320, so that the energy dissipation raft 34 can move radially along the movable column 320; and the outer surface of the energy dissipation raft 34 (i.e., the surface facing the trapezoidal block 330) is an inclined surface, with an inclination angle the same as that of the corresponding trapezoidal block 330. With this structural configuration, the pressure exerted by the main cable on the cable saddle 12 during the erection and use phases is transmitted to the movable shell 33. The movable shell 33 is pressed down (i.e., moved away from the lower support plate 42 along the axial direction of the movable column 320). At this time, the spring 31 is pressed down with the movable shell 33, the movable column 320 moves up, and the trapezoidal block 330 can drive the energy dissipation raft 34 to move left and right (i.e., along the radial direction of the movable column 320) as the movable shell 330 moves. That is, the energy dissipation raft 34 can move left and right (i.e., along the radial direction of the movable column 320) through the up and down (i.e., along the axial direction of the movable column 320) movement of the trapezoidal block 330 and the movable column 320. Through relative movement, a part of the pressure can be relieved, which can buffer part of the pressure of the cable saddle 12 on the anchor 10 and balance the unbalanced impact pressure of the main cable on the arc-shaped saddle body 21 of the cable saddle 12.

[0063] It should be noted that there are two trapezoidal blocks 330. The two trapezoidal blocks 330 are located on opposite sides of the movable column 320 and fixed on opposite side walls of the movable shell 33. The two sides of the energy dissipation raft 34 facing the two trapezoidal blocks 330 are inclined surfaces. With this arrangement, the energy dissipation raft 34 can be moved left and right (i.e., radially along the movable column 320) by moving the trapezoidal blocks 330 and the movable column 320 up and down (i.e., along the axial direction of the movable column 320).

[0064] To ensure the smooth progress of the above-mentioned movement process, and to effectively buffer part of the pressure of the sway saddle 12 on the anchor body, and to effectively balance the unbalanced impact pressure of the main cable on the arc-shaped saddle body 21 of the sway saddle 12, in some embodiments of the present invention, limiting blocks 331 are provided on both sides of the energy dissipation raft 34 along the length direction of the movable column 320. The limiting blocks 331 are fixedly connected to the inner wall of the movable shell 33 to restrict the movement of the energy dissipation raft 34 along the axial direction of the movable column 320, thereby ensuring that the energy dissipation raft 34 can only move left and right (that is, along the radial direction of the movable column 320).

[0065] Furthermore, a guide post is fitted onto the outer side of the movable column 320, and the guide post is fixedly connected to the inner wall of the fixed shell 35. The guide post has a through hole along its axial direction for the guide post to pass through. The size of the through hole is slightly larger than the size of the movable column 320 to ensure that the movable column 320 can smoothly pass through the through hole axially. The guide post plays a guiding and limiting role in the movement of the movable column 320, preventing the movable column 320 from deviating during movement.

[0066] In an optional embodiment of the present invention, two rebounders 30 are provided, and the two rebounders 30 are arranged close to the two side edges of the lower bearing plate 42. This arrangement can more effectively buffer part of the pressure of the slewing saddle 12 on the anchor body, and more effectively balance the unbalanced impact pressure of the main cable on the arc-shaped saddle body 21 of the slewing saddle 12.

[0067] See again Figure 1 The anchor 10 is provided with a groove 13 and a guide groove 14 connecting the groove 13. The top surface of the lower support plate 42 facing away from the slide plate is a right-angled plane, that is, the top surface of the lower support plate 42 is adapted to the groove 13 to become a plane perpendicular to each other at 90°. The lower support plate 42 is fixed in the groove 13 by bolts. The rebound spring 30 is fixed in the guide groove 14. Specifically, the fixing shell 35 of the rebound spring 30 is fixed in the guide groove 14 by bolts. Furthermore, the top of the groove 13 and the guide groove 14 are provided with a top cover.

[0068] The force transmission device of the present invention is located in the groove 13 and guide groove 14 of the anchor 10. After construction is completed, a top cover is added to facilitate later maintenance and extend its service life.

[0069] It should be noted that the radius of the arc-shaped saddle body 21 can be determined according to the dimensions of the saddle head 20 and the groove 13 of the anchor 10.

[0070] The present invention also provides a construction method for the force transmission device under the saddle of the rotating cable saddle 12 of the ground-anchored suspension bridge as described above, the construction method comprising the following steps:

[0071] Step 1: The anchor 10 is designed with a guide groove 14 based on the rebound hammer 30, and the rebound hammer 30 is installed in the guide groove 14. The specific operation is as follows: The anchor 10 is designed with the dimensions of the guide groove 14 based on the dimensions of the rebound hammer 30, and the space required for placing the rebound hammer 30 is reserved. The connection position between the fixing shell 35 and the anchor 10 is marked. During installation, the rebound hammer 30 is first hoisted to the reserved position of the guide groove 14 of the anchor 10, and then the fixing shell 35 is connected to the concrete bolt of the anchor 10 in the guide groove 14 according to the pre-marked position. This completes the installation operation of the rebound hammer 30.

[0072] Step two: Install the lower support plate 42 into the groove 13 of the anchor 10. First, install the push-limiting assembly 420 at both the upper and lower ends of the lower support plate 42. Then, install the stainless steel mirror panel 43 and the sliding plate in sequence, and inject lubricating oil. The specific operation is as follows: The lower support plate 42 is connected to the concrete in the groove 13 of the anchor 10 by threads. The lower support plate stop 422 of the push-limiting assembly 420 is fixed to the upper and lower ends of the lower support plate 42 by bolts. The bottom of the jack 421 is bolted to the side wall of the lower support plate stop 422. At this time, the jack 421 is not working. The stainless steel mirror panel 43 is inlaid into the opposite surfaces of the upper support plate 41 and the lower support plate 42. Then, the modified ultra-high molecular weight polyethylene sliding plate 44 is installed, and lubricating oil is injected between the mating plate surfaces.

[0073] Step 3: Install the upper bearing plate 41, and then push the jack 421 of the push-limit assembly 420 to fix the upper bearing plate 41. Specifically, oil is supplied to the cylinder 4210 through the oil inlet 4211 of the jack 421. When the jack 421 works, the output shaft 4212 pushes a certain distance to fix the upper bearing plate 41 and prevent the upper bearing plate 41 from sliding up and down.

[0074] Step four: Install the saddle head 20, connecting rod 22 and arc-shaped saddle body 21 of the cable saddle 12. Install arc-shaped stops 410 on both sides of the upper bearing plate 41 along the longitudinal direction. The arc-shaped stops 410 are threadedly connected to the upper bearing plate 41 to restrict the arc-shaped saddle body 21 from sliding along the longitudinal direction.

[0075] Step 5: Insert the main cable into the saddle groove of the saddle head 20 of the cable saddle 12, and adjust the angle of the arc-shaped saddle body 21 by jack 421 to ensure that the resultant force direction of the main cable meets the design requirements. After the position of the main cable is determined, jack 421 stops supplying oil. After that, jack 421, as a permanent structure, together with the lower bearing plate stop 422, restricts the up and down movement of the upper bearing plate 41.

[0076] After the saddle-under force transmission device of the present invention is completed, during the erection process and use stage, the pressure on the main cable saddle 12 is transmitted to the lower bearing plate 42, and then a portion of the force is buffered by the rebound spring 30, which balances the longitudinal unbalanced pressure applied by the main cable.

[0077] It should be noted that during construction, the force transmission devices can all be prefabricated in the factory and then transported to the construction site for on-site installation. This helps ensure the quality of each component and speeds up the construction progress. Specifically, the push-limiting assemblies 420 on both sides of the lower bearing plate 42 can replace ground anchors to ensure the main cable remains horizontal, reducing construction costs and avoiding the impact of manufacturing errors.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A force transmission device under the saddle of a ground-anchored suspension bridge's slewing cable, applied to the saddle system of the slewing cable of a ground-anchored suspension bridge, the saddle system comprising an anchor and a saddle, characterized in that, The force transmission device includes: An arc-shaped saddle body is fixedly connected to the saddle head of the cable saddle. An arc-shaped sliding pair includes an upper support plate, a sliding plate, and a lower support plate that are fitted together. The upper support plate and the sliding plate are both arc-shaped plates. The surface of the lower support plate facing the sliding plate is an arc surface. The upper support plate is fixedly connected to the arc-shaped saddle body, and the lower support plate is anchored to the anchor. Two arc-shaped stops are provided, and the two arc-shaped stops are fixed longitudinally to the two ends of the upper support plate and abut against the two sides of the arc-shaped saddle body; Two push-limiting groups are provided, which are located at the upper and lower ends of the lower bearing plate and can movably abut against the upper and lower end faces of the upper bearing plate to adjust the angle of the arc-shaped saddle.

2. The ground-anchored suspension bridge slewing cable saddle-mounted force transmission device as described in claim 1, characterized in that, The arc-shaped stop includes an arc-shaped right-angle plate and multiple trapezoidal plates, with the multiple trapezoidal plates evenly arranged along the arc length direction on the concave side of the arc-shaped right-angle plate.

3. The ground-anchored suspension bridge slewing cable saddle-mounted force transmission device as described in claim 1, characterized in that, The push-limiting group includes: Lower support plate stop, the lower support plate stop is fixed at the upper and lower ends of the lower support plate; Multiple jacks, the cylinder bodies of the multiple jacks are fixed at intervals on the lower support plate block, and the output shafts of the multiple jacks can all movably abut against the upper support plate.

4. The ground-anchored suspension bridge slewing cable saddle-mounted force transmission device as described in claim 1, characterized in that, The skateboard is a modified ultra-high molecular weight polyethylene skateboard; The arc-shaped sliding pair also includes two arc-shaped stainless steel mirror panels, which are respectively embedded in the surfaces of the upper support plate and the lower support plate, and are attached to the opposite sides of the modified ultra-high molecular weight polyethylene sliding plate. Lubricating oil is filled between the arc-shaped stainless steel mirror panels and the modified ultra-high molecular weight polyethylene sliding plate.

5. The ground-anchored suspension bridge slewing cable saddle-mounted force transmission device as described in claim 4, characterized in that, The force transmission device also includes a rebound spring, one end of which is fixedly connected to the anchor, and the other end of which elastically abuts against the lower support plate.

6. The ground-anchored suspension bridge slewing cable saddle-mounted force transmission device as described in claim 5, characterized in that, The rebound spring includes: A fixed shell, which is a shell open at one end, is fixed to the anchor, and has movable columns on it; The movable shell is a shell with one open end. The closed end of the movable shell abuts against the lower support plate. The open end of the movable shell passes through the opening of the fixed shell and can move relative to the fixed shell along the axis of the movable column. A trapezoidal block is provided on the inner side of the opening of the movable shell. The surface of the trapezoidal block facing the movable column is an inclined surface. An elastic element, one end of which is connected to the movable column, and the other end of which elastically abuts against the movable shell; A stilling raft, which is movably fitted onto the outside of the movable column, wherein the surface of the stilling raft facing the trapezoidal block is an inclined surface; The trapezoidal block moves along the axial direction of the movable column with the movable shell, which can drive the energy dissipation raft to move radially along the movable column.

7. The ground-anchored suspension bridge slewing cable saddle-mounted force transmission device as described in claim 6, characterized in that, Limiting blocks are provided on both sides of the energy dissipation raft along the length of the movable column. The limiting blocks are fixedly connected to the inner wall of the movable shell to restrict the movement of the energy dissipation raft along the axial direction of the movable column. A guide post is also fitted on the outside of the movable column, and the guide post is fixedly connected to the inner wall of the fixed shell.

8. The ground-anchored suspension bridge slewing cable saddle-mounted force transmission device as described in claim 5, characterized in that, Two rebound springs are provided, and the two rebound springs are located near the two side edges of the lower support plate.

9. The ground-anchored suspension bridge slewing cable saddle-mounted force transmission device as described in claim 8, characterized in that, The anchor is provided with a groove and a guide groove connecting the groove. The top surface of the lower support plate facing away from the slide plate is a plane perpendicular to each other at 90°. The lower support plate is fixed in the groove, and the rebound spring is fixed in the guide groove. The top of the groove and the guide groove are provided with a top cover.

10. A construction method for the force transmission device under the saddle of the rotating cable of a ground-anchored suspension bridge as described in claim 9, characterized in that, The construction method includes the following steps: Step 1: The anchor is designed with a guide groove based on the rebound hammer design, and the rebound hammer is installed in the guide groove; Step 2: Install the lower bearing plate in the groove of the anchor. First, install the push-limiting assembly at the upper and lower ends of the lower bearing plate respectively. Then, install the stainless steel mirror panel and the sliding plate in sequence, and inject lubricating oil. Step 3: Install the upper support plate, and then push the jack of the jacking limit assembly to fix the upper support plate. Step 4: Install the saddle head, connecting rod and arc-shaped saddle body of the cable saddle. Install arc-shaped stops on both sides of the upper bearing plate along the longitudinal direction to restrict the arc-shaped saddle body from sliding longitudinally. Step 5: Insert the main cable into the saddle head groove of the cable saddle, and adjust the angle of the arc-shaped saddle body with the jack. After the position of the main cable is determined, stop the oil supply to the jack.

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