Cable-stayed bridge steel anchor beam pull plate sliding support device and longitudinal displacement adjusting method

Abstract

This invention provides a sliding support device for the tie plate of a cable-stayed bridge steel anchor beam and a method for adjusting longitudinal displacement. A motor meshes with an external gear set to drive the external gear set to rotate. The external gear set meshes with an intermediate gear to drive the intermediate gear to rotate. The intermediate gear meshes with an internal gear set to drive the internal gear set to rotate. The internal gear set meshes with a rack to drive the tie plate to slide longitudinally on the bracket and to be limited laterally. The method includes active tension adjustment and passive tension adjustment. The device of this invention can actively or passively release the longitudinal displacement of the tie plate and simultaneously constrain the deformation of the tie plate in other directions, thus fully utilizing the tensile strength of the tie plate and providing a stable connection between the tie plate and the bracket. The device of this invention is a novel connection device between the tie plate and the bracket, capable of adapting to changes in the cable force on both sides during construction, ensuring that the cable force on both sides remains balanced throughout the construction process.

Description

Technical Field

[0001] This invention belongs to the field of road and bridge construction technology, and relates to steel anchor beams for cable-stayed bridges, specifically to a sliding support device for the tie plate of a steel anchor beam for a cable-stayed bridge and a method for adjusting longitudinal displacement. Background Technology

[0002] Cable-stayed bridges have achieved great success among various bridge types due to their unique and beautiful shape and powerful spanning capacity. The cables on both sides of the bridge tower are anchored to the inner wall of the tower via steel anchor beams and steel anchor boxes, and bear the horizontal component of the force exerted by the cables on the tower. Among these, steel anchor beams are widely used due to their superior load-bearing performance and suitability for specific applications. The tension plates of the steel anchor beams are the main devices for bearing the horizontal tensile forces on both sides, possessing strong tensile strength. They are generally anchored to the lower brackets with bolts, and the force is transferred to the inner wall of the tower through the brackets.

[0003] Current engineering trends necessitate fully utilizing the performance of each component. Traditional steel anchor beam devices are outdated, with some components failing to achieve their full potential, thus wasting their performance. Therefore, continuous optimization of their stress distribution and structure is required. The main drawbacks of traditional steel anchor beams are as follows:

[0004] First, since the tie plate is anchored to the bracket with bolts, the tensile force of the tie plate to both sides of the tower is restricted, so the tie plate cannot make full use of its superior tensile performance.

[0005] Secondly, since the cable tie plate and the bracket are anchored together by bolts, the horizontal component of the cable force is mainly transmitted to the inner wall of the tower through the bracket, which is not conducive to the stress distribution of the tower.

[0006] Third, the anchoring of bolts restricts the deformation of the pull plate in all directions, which is not conducive to the pull plate being stretched and deformed to both sides.

[0007] Fourth, during construction, the cable tension is constantly changing, and the steel anchor beam cannot adapt to these changes, thus failing to balance the cable tension on both sides of the tower. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a sliding support device for the tie plate of the steel anchor beam of a cable-stayed bridge and a longitudinal displacement adjustment method, so as to solve the technical problem that the tensile strength of the tie plate in the existing technology is difficult to fully utilize.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] A sliding support device for a steel anchor beam of a cable-stayed bridge includes a bracket with a tie plate installed on it. The tie plate can move longitudinally on the bracket. The bracket includes a support plate with a row of longitudinally arranged internal gear mounting holes on both sides of the support plate. A frame mounting hole is provided between two adjacent internal gear mounting holes. The multiple frame mounting holes on each side of the longitudinal direction are respectively installed with the transverse inner end of the same frame.

[0011] The pull plate includes a pull plate body, and toothed racks are respectively provided on both longitudinal sides of the pull plate body.

[0012] The frame includes a frame body, with frame connectors corresponding to frame mounting holes at the inner horizontal end of the frame body. The frame connectors are detachably installed in the frame mounting holes, and the frame connectors are also detachably installed from the frame body. A motor base is provided at the top of the frame body, and a pair of external gear set support seats with the same vertical central axis are provided at the outer horizontal end of the frame body. An intermediate gear rotating seat is provided in the middle horizontal direction of the frame body.

[0013] The motor is mounted on the motor base. The external gear set is rotatably mounted on the support of the pair of external gear sets with the same vertical central axis. The intermediate gear is mounted on the intermediate gear rotating seat. The intermediate gear can rotate around the vertical central axis of the intermediate gear rotating seat. Each internal gear mounting hole is equipped with a rotatable internal gear set.

[0014] The motor meshes with the external gear set to drive the external gear set to rotate, the external gear set meshes with the intermediate gear to drive the intermediate gear to rotate, the intermediate gear meshes with the internal gear set to drive the internal gear set to rotate, and the internal gear set meshes with the rack to drive the pull plate to slide longitudinally on the bracket and to be limited laterally.

[0015] The present invention also has the following technical features:

[0016] Specifically, the external gear set includes an upper external gear shaft and a lower external gear shaft that are detachably coaxially connected. An external bevel gear is provided at the top of the upper external gear shaft, and the external bevel gear meshes with a drive bevel gear provided on the motor shaft. The external bevel gear is driven by the motor. A lower external gear is coaxially fixedly provided in the middle of the lower external gear shaft, and the lower external gear meshes with the intermediate gear for drive. The upper external gear shaft below the external bevel gear is rotatably mounted in the external gear set support, and the lower external gear shaft below the lower external gear is also rotatably mounted in the external gear set support.

[0017] Specifically, the internal gear set includes an internal gear shaft, an upper internal gear fixedly mounted on the upper part of the internal gear shaft, the upper internal gear meshing with the rack to drive the pull plate to move longitudinally; a lower internal gear is detachably mounted on the lower part of the internal gear shaft, the lower internal gear meshing with the intermediate gear and being driven; the internal gear shaft between the upper internal gear and the lower internal gear is rotatably mounted in the internal gear mounting hole.

[0018] Specifically, the main frame is composed of multiple rods that are fixedly connected together.

[0019] Specifically, the frame connector includes a detachable upper connecting plate and a lower connecting plate. The upper connecting plate is divided into an integrally formed frame connecting part, a hole connecting part, and a lower plate connecting part from top to bottom. The thickness of the frame connecting part is greater than the thickness of the hole connecting part. The hole connecting part is fitted into the frame mounting hole. The lower plate connecting part is installed in the upper connecting cavity opened at the top of the lower connecting plate and connected by a first bolt.

[0020] The upper connecting plate and the lower connecting plate are respectively provided with rod mounting holes along the horizontal direction. The rod mounting holes are installed with horizontally arranged rods on the frame. The horizontally arranged rods are connected to the frame connecting parts by a second bolt.

[0021] Preferably, one external gear set meshes with two intermediate gears, and each intermediate gear meshes with two internal gear sets.

[0022] Preferably, the bottom of the support plate is provided with a corbel web plate, and the corbel web plate is provided with a corbel stiffening plate.

[0023] This invention also protects a method for adjusting the longitudinal displacement of the tie plate of the steel anchor beam of a cable-stayed bridge, which uses the sliding support device for the tie plate of the steel anchor beam of a cable-stayed bridge as described above.

[0024] Preferably, the method includes active stretch adjustment and passive stretch adjustment.

[0025] Compared with the prior art, the present invention has the following technical effects:

[0026] (I) The device of the present invention can actively or passively release the longitudinal displacement of the pull plate and at the same time constrain the deformation of the pull plate in other directions, so that the tensile strength of the pull plate can be fully utilized, and at the same time play a stable connection role between the pull plate and the bracket.

[0027] (II) The device of the present invention is a new connection device between the pull plate and the bracket, which can adapt to the changes in the cable force on both sides during the construction process and ensure that the cable force on both sides is always balanced during the construction process.

[0028] (III) In the device of the present invention, the pull plate and the bracket are connected together by an internal gear. The uppermost gear of the internal gear has a larger diameter than the gear that contacts it, which can limit the vertical displacement of the pull plate and limit the horizontal displacement of the pull plate.

[0029] (IV) The device of the present invention can not only limit the vertical and lateral displacement of the pull plate, but also release the longitudinal displacement of the pull plate, so that the tension is mainly borne by the pull plate, and the tensile strength of the pull plate is fully utilized.

[0030] (V) The longitudinal displacement adjustment method of the present invention can concentrate the tension on the tension plate, thereby avoiding excessive tension on the inner wall of the tower and improving its stress performance.

[0031] (VI) In the longitudinal displacement adjustment method of the present invention, the cable force of the cable is constantly changing during the construction process. The present invention can drive the tension plate to stretch by rotating the rotating rod during the construction process, and achieve the purpose of balancing the cable force on both sides of the cable.

[0032] (VII) The longitudinal displacement adjustment method of the present invention uses an electric device, which saves manpower and makes the construction more reliable. The electric device is easy to replace, has a simple cost, and has good economic performance. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the sliding support device for the steel anchor beam of a cable-stayed bridge.

[0034] Figure 2 This is a schematic diagram of the structure of a cow's leg.

[0035] Figure 3 This is a schematic diagram of the pull plate structure.

[0036] Figure 4 This is a schematic diagram of the framework.

[0037] Figure 5 This is a schematic diagram of the motor structure.

[0038] Figure 6 This is a schematic diagram of the external gear set.

[0039] Figure 7 This is a schematic diagram of the intermediate gear.

[0040] Figure 8 This is a schematic diagram of the internal gear set.

[0041] Figure 9 This is a structural schematic diagram of the frame connector.

[0042] The meanings of the labels in the diagram are as follows: 1-bracket, 2-tension plate, 3-frame, 4-frame connector, 5-motor, 6-external gear set, 7-intermediate gear, 8-internal gear set, 9-drive bevel gear, 10-bearing, 11-nut, 12-superstructure of steel anchor beam of cable-stayed bridge, 13-bolt.

[0043] 101-Support plate, 102-Internal gear mounting hole, 103-Frame mounting hole, 104-Corner web plate, 105-Corner stiffening plate.

[0044] 201-Pulley body, 202-Rack.

[0045] 301-Frame main body, 302-Motor base, 303-External gear set support, 304-Intermediate gear rotating base, 305-Ring member.

[0046] 401 - Upper connecting plate, 402 - Lower connecting plate, 403 - Rod mounting hole, 404 - Second bolt.

[0047] 40101-Frame connection part, 40102-Hole connection part, 40103-Lower plate connection part.

[0048] 40201 - Upper connecting cavity, 40202 - First bolt.

[0049] 601 - Upper external gear shaft, 602 - Lower external gear shaft, 603 - External bevel gear, 604 - Lower external gear.

[0050] 801 - Internal gear shaft, 802 - Upper internal gear, 803 - Lower internal gear.

[0051] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0052] It should be noted that, unless otherwise specified, all components in this invention are components known in the prior art.

[0053] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0054] Example 1:

[0055] This embodiment provides a sliding support device for the tie plate of the steel anchor beam in a cable-stayed bridge, such as... Figure 1 As shown, it includes a bracket 1, on which a pull plate 2 is installed, and the pull plate 2 can move longitudinally on the bracket 1; as Figure 2As shown, the bracket 1 includes a support plate 101. A row of longitudinally arranged internal gear mounting holes 102 are respectively provided on the support plate 101 near the longitudinal sides. A frame mounting hole 103 is provided between two adjacent internal gear mounting holes 102. The multiple frame mounting holes 103 on each longitudinal side are respectively installed with the transverse inner end of the same frame 3.

[0056] like Figure 3 As shown, the pull plate 2 includes a pull plate body 201, and racks 202 are respectively provided on both longitudinal sides of the pull plate body 201.

[0057] like Figure 4 As shown, the frame 3 includes a frame body 301. The inner horizontal end of the frame body 301 is provided with a frame connector 4 corresponding to the frame mounting holes 103. The frame connector 4 is detachably installed in the frame mounting holes 103, and the frame connector 4 is also detachably installed with respect to the frame body 301. The top of the frame body 301 is provided with a motor base 302. The outer horizontal end of the frame body 301 is provided with a pair of external gear set support seats 303 with the same vertical central axis. The middle horizontal part of the frame body 301 is provided with an intermediate gear rotating seat 304.

[0058] like Figure 1 As shown, a motor 5 is mounted on a motor base 302, an external gear set 6 is rotatably mounted on a pair of external gear set support seats 303 with the same vertical central axis, an intermediate gear 7 is fitted on an intermediate gear rotating seat 304, the intermediate gear 7 can rotate around the vertical central axis of the intermediate gear rotating seat 304, and an internal gear set 8 that can rotate is mounted on each internal gear mounting hole 102.

[0059] like Figure 1 and Figure 5 As shown, motor 5 meshes with external gear set 6 to drive external gear set 6 to rotate, external gear set 6 meshes with intermediate gear 7 to drive intermediate gear 7 to rotate, intermediate gear 7 meshes with internal gear set 8 to drive internal gear set 8 to rotate, and internal gear set 8 meshes with rack 202 to drive pull plate 2 to slide longitudinally on bracket 1 and be limited laterally.

[0060] As one specific solution in this embodiment, such as Figure 6As shown, the external gear set 6 includes an upper external gear shaft 601 and a lower external gear shaft 602 that are detachably coaxially connected. An external bevel gear 603 is provided at the top of the upper external gear shaft 601. The external bevel gear 603 meshes with a drive bevel gear 9 provided on the rotating shaft of the motor 5, and the external bevel gear 603 is driven by the motor 5. A lower external gear 604 is coaxially fixedly provided in the middle of the lower external gear shaft 602. The lower external gear 604 meshes with and drives the intermediate gear 7. The upper external gear shaft 601 below the external bevel gear 603 is rotatably installed in the external gear set support 303, and the lower external gear shaft 602 below the lower external gear 604 is also rotatably installed in the external gear set support 303.

[0061] In this embodiment, the upper external gear shaft 601 and the lower external gear shaft 602 are detachably connected by a third bolt 13.

[0062] In this embodiment, the upper external gear shaft 601 and the external gear set support 303 are rotatably mounted via bearing 10. The lower external gear shaft 602 and the external gear set support 3 are also rotatably mounted via bearing 10. Suitable commonly used bearings can be selected as needed for bearing 10.

[0063] In this embodiment, as Figure 7 As shown, the intermediate gear rotating seat 304 and the intermediate gear 7 are also rotatably mounted via the bearing 10. The intermediate gear rotating seat 304 serves as the inner ring of the bearing, and the intermediate gear 7 serves as the outer ring of the bearing. The bearing 10 can be selected from suitable commonly used bearings as needed.

[0064] As one specific solution in this embodiment, such as Figure 8 As shown, the internal gear set 8 includes an internal gear shaft 801. An upper internal gear 802 is fixedly mounted on the upper part of the internal gear shaft 801. The upper internal gear 802 meshes with the rack 202 to drive the pull plate 2 to move longitudinally. A lower internal gear 803 is detachably mounted on the lower part of the internal gear shaft 801. The lower internal gear 803 meshes with the intermediate gear 7 and is driven. The internal gear shaft 801 between the upper internal gear 802 and the lower internal gear 803 is rotatably mounted in the internal gear mounting hole 102.

[0065] In this embodiment, the lower internal gear 803 is detachably installed by a nut 11 installed at the bottom end of the internal gear shaft 801.

[0066] In this embodiment, an internal gear shaft 801 is installed in each internal gear mounting hole 102.

[0067] In this embodiment, the internal gear shaft 801 is detachably mounted between the bearing 10 and the internal gear mounting hole 102. The bearing 10 can be any commonly used bearing selected as needed.

[0068] In this embodiment, the upper structure 12 of the steel anchor beam of the cable-stayed bridge is installed on the tie plate 2.

[0069] As a preferred embodiment of this invention, such as Figure 4 As shown, the main frame 301 is composed of multiple rods 305 that are fixedly connected together.

[0070] As one specific solution in this embodiment, such as Figure 9 As shown, the frame connector 4 includes a detachable upper connecting plate 401 and a lower connecting plate 402. The upper connecting plate 401 is divided into an integrally formed frame connecting part 40101, a hole connecting part 40102 and a lower plate connecting part 40103 from top to bottom. The thickness of the frame connecting part 40101 is greater than the thickness of the hole connecting part 40102. The hole connecting part 40102 is fitted into the frame mounting hole 103. The lower plate connecting part 40103 is installed in the upper connecting cavity 40201 opened at the top of the lower connecting plate 402 and connected by the first bolt 40202.

[0071] The frame connecting part 40101 of the upper connecting plate 401 and the lower connecting plate 402 are respectively provided with rod mounting holes 403 along the horizontal direction. The rod mounting holes 403 are provided with rods 305 arranged horizontally on the frame 3. The horizontally arranged rods 305 are connected to the frame connecting part 4 by the second bolts 404.

[0072] As a preferred embodiment of this invention, such as Figure 1 As shown, an external gear set 6 meshes with two intermediate gears 7, and each intermediate gear 7 meshes with two internal gear sets 8.

[0073] As a preferred embodiment of this invention, such as Figure 2 As shown, a cow leg web plate 104 is provided at the bottom of the support plate 101, and a cow leg stiffening plate 105 is provided on the cow leg web plate 104.

[0074] The installation steps of the sliding support device for the steel anchor beam tie plate of the cable-stayed bridge of the present invention are as follows:

[0075] Step 1, install internal gear set 8:

[0076] The internal gear shaft 801 of each internal gear set 8 is installed into the internal gear mounting hole 102 through the bearing 10, so that the upper internal gear 802 meshes with the rack 202. The lower internal gear 803 is fitted on the internal gear shaft 801 below the internal gear mounting hole 102. The lower internal gear 803 is vertically limited and locked by the threaded connection between the nut 11 and the bottom of the internal gear shaft 801.

[0077] Step 2, Install frame 3:

[0078] Insert the hole connection part 40102 of the upper connecting plate 401 of the frame connector 4 into the frame mounting hole 103, and connect the upper connecting plate 401 and the lower connecting plate 402 with the first bolt 40202; insert the transverse rod 305 of the frame body 301 into the rod mounting hole 403 and connect and lock it with the second bolt 404.

[0079] Step 3: Install intermediate gear 7:

[0080] The intermediate gear 7 is installed into the intermediate gear rotating seat 304, so that the intermediate gear 7 meshes with the lower internal gear 803 for driving.

[0081] Step 4: Install external gear set 6.

[0082] The upper external gear shaft 601 and the lower external gear shaft 602 are respectively installed into a pair of coaxially arranged external gear set support seats 303. Then, the upper external gear shaft 601 and the lower external gear shaft 602 are connected and locked by the third bolt 13, so that the lower external gear 604 meshes with the intermediate gear 7 for driving.

[0083] Step 5, Install motor 5:

[0084] The motor 5 is fixedly mounted on the motor base 302, so that the drive bevel gear 9 meshes with the outer bevel gear 603 for driving.

[0085] Example 2:

[0086] This embodiment provides a method for adjusting the longitudinal displacement of the steel anchor beam tie plate of a cable-stayed bridge. This method uses the sliding support device for the steel anchor beam tie plate of a cable-stayed bridge given in Embodiment 1.

[0087] The longitudinal displacement adjustment method includes active tension adjustment and passive tension adjustment.

[0088] The steps of active tension adjustment are as follows: turn on motor 5 so that drive bevel gear 9 rotates at an adjustable speed and direction; drive bevel gear 9 drives external gear set 6 to rotate, lower external gear 604 of external gear set 6 drives intermediate gear 7 to rotate, intermediate gear 7 drives lower internal gear 803 of internal gear set 8 to rotate, lower internal gear 803 drives upper internal gear 802 to rotate, upper internal gear 802 drives pull plate 2 to perform longitudinal tension sliding or compression sliding on bracket 1 through meshing with rack 202, pull plate 2 slides to a predetermined position to achieve cable force balance on both sides.

[0089] The passive tension adjustment steps are as follows: Remove the frame 3 so that the lower internal gear 803 of the internal gear set 8 is separated from the middle gear 7, and the internal gear set 8 can rotate freely. Under the tension of the cable, the upper internal gear 802 of the internal gear set 8 only restricts the lateral displacement of the pull plate 2, and the pull plate 2 can achieve free sliding in the longitudinal direction, that is, to achieve passive tension adjustment.

Claims

1. A sliding support device for a steel anchor beam of a cable-stayed bridge, comprising a bracket (1), a tie plate (2) mounted on the bracket (1), the tie plate (2) being capable of longitudinal movement on the bracket (1), characterized in that, The bracket (1) includes a support plate (101). A row of longitudinally arranged internal gear mounting holes (102) are respectively provided on the support plate (101) near the longitudinal sides. A frame mounting hole (103) is provided between two adjacent internal gear mounting holes (102). The multiple frame mounting holes (103) on each longitudinal side are respectively installed on the transverse inner end of the same frame (3). The pull plate (2) includes a pull plate body (201), and toothed racks (202) are respectively provided on both longitudinal sides of the pull plate body (201). The frame (3) includes a frame body (301), and a frame connector (4) corresponding to the frame mounting holes (103) is provided at the inner horizontal end of the frame body (301). The frame connector (4) is detachably installed in the frame mounting holes (103), and the frame connector (4) is also detachably installed with the frame body (301). A motor base (302) is provided at the top of the frame body (301), and a pair of external gear set support seats (303) with the same vertical central axis are provided at the outer horizontal end of the frame body (301). An intermediate gear rotating seat (304) is provided in the middle horizontal direction of the frame body (301). A motor (5) is mounted on the motor mount (302). An external gear set (6) is rotatably mounted on a pair of external gear set support seats (303) with the same vertical central axis. An intermediate gear (7) is fitted on the intermediate gear rotating seat (304). The intermediate gear (7) can rotate around the vertical central axis of the intermediate gear rotating seat (304). A rotatable internal gear set (8) is mounted on each internal gear mounting hole (102). The motor (5) meshes with the external gear set (6) to drive the external gear set (6) to rotate. The external gear set (6) meshes with the intermediate gear (7) to drive the intermediate gear (7) to rotate. The intermediate gear (7) meshes with the internal gear set (8) to drive the internal gear set (8) to rotate. The internal gear set (8) meshes with the rack (202) to drive the pull plate (2) to slide longitudinally on the cow leg (1) and to be limited laterally.

2. The sliding support device for the steel anchor beam of a cable-stayed bridge as described in claim 1, characterized in that, The external gear set (6) includes an upper external gear shaft (601) and a lower external gear shaft (602) that are detachably coaxially connected. An external bevel gear (603) is provided at the top of the upper external gear shaft (601). The external bevel gear (603) meshes with a drive bevel gear (9) provided on the rotating shaft of the motor (5). The external bevel gear (603) is driven by the motor (5). A lower external gear (604) is coaxially fixed in the middle of the lower external gear shaft (602). The lower external gear (604) meshes with an intermediate gear (7) for driving. The upper external gear shaft (601) below the external bevel gear (603) is rotatably installed in the external gear set support (303). The lower external gear shaft (602) below the lower external gear (604) is also rotatably installed in the external gear set support (303).

3. The sliding support device for the steel anchor beam of a cable-stayed bridge as described in claim 1, characterized in that, The internal gear set (8) includes an internal gear shaft (801), an upper internal gear (802) is fixedly installed on the upper part of the internal gear shaft (801), the upper internal gear (802) meshes with the rack (202) to drive the pull plate (2) to move longitudinally; a lower internal gear (803) is detachably installed on the lower part of the internal gear shaft (801), the lower internal gear (803) meshes with the intermediate gear (7) and is driven; the internal gear shaft (801) between the upper internal gear (802) and the lower internal gear (803) is rotatably installed in the internal gear mounting hole (102).

4. The sliding support device for the steel anchor beam of a cable-stayed bridge as described in claim 1, characterized in that, The main frame (301) is composed of multiple rods (305) that are fixedly connected together.

5. The sliding support device for the steel anchor beam of a cable-stayed bridge as described in claim 4, characterized in that, The frame connector (4) includes a detachable upper connecting plate (401) and a lower connecting plate (402). The upper connecting plate (401) is divided into an integrally formed frame connecting part (40101), a hole connecting part (40102) and a lower plate connecting part (40103) from top to bottom. The thickness of the frame connecting part (40101) is greater than the thickness of the hole connecting part (40102). The hole connecting part (40102) is fitted into the frame mounting hole (103). The lower plate connecting part (40103) is installed in the upper connecting cavity (40201) opened at the top of the lower connecting plate (402) and connected by the first bolt (40202). The upper connecting plate (401) and the lower connecting plate (402) are respectively provided with rod mounting holes (403) along the horizontal direction. The rod mounting holes (403) are provided with rods (305) arranged horizontally on the frame (3). The horizontally arranged rods (305) are connected to the frame connecting member (4) by a second bolt (404).

6. The sliding support device for the steel anchor beam of a cable-stayed bridge as described in claim 1, characterized in that, An external gear set (6) meshes with two intermediate gears (7), and each intermediate gear (7) meshes with two internal gear sets (8).

7. The sliding support device for the steel anchor beam of a cable-stayed bridge as described in claim 1, characterized in that, The support plate (101) is provided with a cow leg belly plate (104) at the bottom, and a cow leg stiffening plate (105) is provided on the cow leg belly plate (104).

8. A method for adjusting the longitudinal displacement of the tie plate of a steel anchor beam in a cable-stayed bridge, characterized in that, The method employs the sliding support device for the steel anchor beam of a cable-stayed bridge as described in any one of claims 1 to 7.

9. The method for adjusting the longitudinal displacement of the steel anchor beam tie plate of a cable-stayed bridge as described in claim 8, characterized in that, This method includes active stretch adjustment and passive stretch adjustment.

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