Temporary pier device for large-span and super-wide double-cable-plane cable-stayed bridge

Abstract

The application provides a large-span and super-wide double-cable-plane cable-stayed bridge temporary pier device, which comprises at least two anchoring platforms, the top end of the anchoring platform is provided with a distribution beam, the distribution beam is used for connecting a steel main beam, a horizontal joint support is connected between the anchoring platforms to form a temporary load-bearing platform, the temporary load-bearing platform is provided with a tension anchor platform on both sides, and a cable is further arranged, the two ends of the cable are connected with the temporary load-bearing platform and the tension anchor platform respectively, and the problems of main beam vibration, horizontal deflection and torsional instability caused by horizontal crosswind are solved.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering, and in particular to a temporary pier device for a long-span, ultra-wide double-cable-stayed bridge. Background Technology

[0002] With the continuous development of bridge design and the increasing demand for transportation, large-span, ultra-wide double-cable-stayed bridges are being built more and more frequently. During the construction of such bridges, cantilever construction is often employed. During the cantilever construction phase, the effects of crosswinds often lead to vibration, horizontal deflection, and torsional instability of the main girder, resulting in significant lateral horizontal forces. To ensure the overall stability of the cable-stayed bridge structure, a temporary pier device to resist these lateral horizontal forces must be installed during the construction of the main girder and stay cables. However, the temporary piers used in such large-span, ultra-wide double-cable-stayed bridges are often structurally complex and costly. Therefore, a device that is easy to construct, structurally simple, and economical is needed to resist these lateral horizontal forces. Summary of the Invention

[0003] This invention provides a temporary pier device for a long-span, ultra-wide double-cable-stayed bridge, which solves the problems of main beam vibration, horizontal deflection, and torsional instability caused by horizontal crosswinds.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a temporary pier device for a long-span, ultra-wide double-cable-stayed bridge, comprising at least two anchoring platforms, a distribution beam at the top of the anchoring platform for connecting the main steel beam, and horizontal bracing between the anchoring platforms to form a temporary load-bearing platform. Anchoring platforms are provided on both sides of the temporary load-bearing platform, and tension cables are also provided, with the two ends of the tension cables connected to the temporary load-bearing platform and the anchoring platform respectively.

[0005] In the preferred embodiment, both the anchoring platform and the tie-anchor platform include multiple vertically arranged steel pipe piles, each steel pipe pile having a pile cap at its top, and the distribution beam being connected to the pile cap.

[0006] In addition to being connected by horizontal bracing, steel pipe piles are also reinforced by diagonal bracing.

[0007] In the preferred embodiment, a reaction seat is provided on the distribution beam at the top of the anchoring platform, and a jack is provided on the reaction seat. One end of the cable is connected to the jack.

[0008] In the preferred embodiment, there are multiple cables, a slide rail device is provided on the anchoring platform, and a translational crossbar is also provided. The translational crossbar is slidably connected to the slide rail device, and a force-bearing crossbar is provided on the translational crossbar. One end of each cable is connected to the force-bearing crossbar, and the force-bearing crossbar moves away from the anchoring platform to tighten the cables.

[0009] In the preferred embodiment, the anchoring platform has multiple fixed pulley assemblies on the side near the anchoring platform. The anchoring platform has a load-bearing crossarm with a central pivot shaft that is rotatably connected to the translational crossarm. The load-bearing crossarm has multiple cable fixing rods. One end of the cable is anchored to the anchoring platform, and the other end of the cable passes through the fixed pulley assemblies in a symmetrical arrangement and is connected to the cable fixing rods. At least two displacement sensors are provided on the side of the load-bearing crossarm away from the anchoring platform. The displacement sensors are aligned with one side of the load-bearing crossarm. A hydraulic cylinder and a fixed support are provided on each end of the anchoring platform near the load-bearing crossarm. One end of the hydraulic cylinder is hinged to the fixed support, and the other end of the hydraulic cylinder is hinged to the load-bearing crossarm.

[0010] In the preferred embodiment, an angle encoder is fitted onto the outer side of the rotating shaft.

[0011] Displacement sensors are relatively easy to debug and can simultaneously measure the distance between the load-bearing crossarm and the anchoring platform. However, due to outdoor conditions and the non-contact nature of the sensor with the load-bearing crossarm, the detection effect is easily affected by interference. For example, if a laser sensor is used, the emitting surface is easily contaminated by dust and water stains, which weakens the light intensity and causes detection failure. Therefore, installing an angle encoder at the shaft and using a sealing cover can detect the rotation angle of the load-bearing crossarm in the same way and is less prone to failure, making it a backup solution.

[0012] In the preferred embodiment, the load-bearing crossarm is provided with multiple sleeve rods, each sleeve rod has a telescopic sliding rod at both ends, and a top sleeve is provided at the end of the sliding rod. A U-shaped frame is provided on the anchoring platform, and the U-shaped frame has an inclined block. The top sleeve abuts against the inclined block. A cavity is provided between the two sliding rods inside the sleeve rod, and the cavity is used to communicate with the hydraulic system.

[0013] In the preferred embodiment, the slide rod and the top sleeve are respectively provided with flange structures, and the top sleeve and the slide rod are slidably connected with a plurality of second disc springs between them.

[0014] In the preferred embodiment, the translation crossbar is provided with an arc-shaped groove, through which the sleeve rod passes.

[0015] In the preferred embodiment, the cable fixing rod is slidably connected to the force-bearing cross arm, and a locking nut is provided at one end of the cable fixing rod. Multiple first disc springs are provided between the locking nut and the force-bearing cross arm.

[0016] The beneficial effects of this invention are as follows: During the maximum double cantilever construction stage, setting up temporary piers to resist lateral horizontal forces can effectively offset the adverse effects of horizontal crosswinds on the main beam; the cable force can be adjusted in real time according to changes in environmental wind force, resulting in higher safety compared to traditional clamping plate limiting methods; using cables to connect the anchoring platform and the anchoring platform, replacing the steel pipe pile reinforcement method, saves a significant amount of material and reduces costs; the load-bearing crossarm simulates the displacement state of the steel main beam and the temporary bearing platform, and the posture of the steel main beam and the temporary bearing platform can be changed by adjusting the load-bearing crossarm; monitoring of the load-bearing crossarm can be completed on the anchoring platform, avoiding long-distance monitoring of the steel main beam and improving monitoring reliability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the bridge layout and temporary pier locations of the present invention.

[0019] Figure 2 This is a schematic diagram of the temporary pier of the present invention.

[0020] Figure 3 This is a side view of the temporary pier of the present invention.

[0021] Figure 4 This is a schematic diagram of the ear seat connection system of the present invention.

[0022] Figure 5 This is a schematic diagram of the thrust seat of the present invention.

[0023] Figure 6 This is a schematic diagram of the bridge layout and temporary pier locations of the present invention.

[0024] Figure 7 This is a schematic diagram of the bridge layout and temporary pier locations of the present invention.

[0025] Figure 8 This is a schematic diagram of the bridge layout and temporary pier locations of the present invention.

[0026] Figure 9 This is a schematic diagram of the bridge layout and temporary pier locations of the present invention.

[0027] Figure 10 This is a schematic diagram of the bridge layout and temporary pier locations of the present invention.

[0028] In the diagram: 1. Load-bearing crossarm; 101. Rotating shaft; 102. Angle encoder; 103. Displacement sensor; 104. Hydraulic cylinder; 105. Fixed support; 106. Translational crossarm; 107. Slide rail device; 108. Sliding block device; 109. Arc-shaped groove; 110. Piston; 111. U-shaped frame; 112. Inclined block; 113. Top sleeve; 114. Slide rod; 115. Cavity; 116. Second disc spring; 117. Anchoring platform; 2. Inclined support; 3. Steel pipe pile; 4. Horizontal bracing support; 5. Pile cap; 6. 7. Distribution beam; 8. Ear seat connection system; 9. Steel main beam; 10. Cable; 10. Fixed pulley assembly; 1001. Cable fixing rod; 1002. First disc spring; 1003. Locking nut; 1004. Jack; 11. Anchoring platform; 12. Anchor head; 13. Reactor seat; 14. Thrust seat; 15. Ear seat connection system stiffening plate; 16. Pin; 17. Tie plate; 18. Steel main beam ear plate; 19. Anchoring platform ear plate; 20. Steel main beam stiffening plate; 21. Main beam baffle; 22. Rubber pad; 23. Thrust seat stiffening plate; 24. Detailed Implementation

[0029] Example 1: like Figure 1-10 In this invention, a temporary pier device for a long-span, ultra-wide double-cable-stayed bridge includes at least two anchoring platforms 2. The top of the anchoring platform 2 is provided with a distribution beam 7, which is used to connect the main steel beam 9. The anchoring platforms 2 are connected by horizontal bracing 5 to form a temporary load-bearing platform. Anchoring platforms 12 are provided on both sides of the temporary load-bearing platform, and a cable 10 is also provided. The two ends of the cable 10 are respectively connected to the temporary load-bearing platform and the anchoring platform 12.

[0030] The upper end of the anchoring platform 2 is provided with a lug connection system 8. The lower end of the lug connection system 8 is connected to the distribution beam 7, and the upper end of the lug connection system 8 abuts against the lower edge of the steel main beam 9.

[0031] In the preferred embodiment, there are multiple cables 10. The anchoring platform 12 is equipped with a slide rail device 107 and a translational crossbar 106. The translational crossbar 106 is slidably connected to the slide rail device 107. The translational crossbar 106 is equipped with a force-bearing crossbar 1. One end of each cable 10 is connected to the force-bearing crossbar 1. The force-bearing crossbar 1 moves away from the anchoring platform 2 to tighten the cable 10.

[0032] Installing a flat plate on the distribution beam 7 facilitates the installation of other mechanisms such as the load-bearing cross arm 1, and also makes it easier to disassemble the mechanisms in a unified manner.

[0033] The length direction of the slide rail device 107 is the line connecting the anchoring platform 12 and the anchoring platform 2. The lower end of the translational crossbeam 106 is provided with a slider device 108, which is engaged with the slide rail device 107 and slides.

[0034] The load-bearing cross arm 1 has a certain length and can connect multiple cables 10 at the same time. When the load-bearing cross arm 1 moves, each cable 10 is tightened synchronously, making the operation simpler.

[0035] Since there is a certain distance between the anchoring platform 12 and the anchoring platform 2, the monitoring of changes in the anchoring platform 2 is mainly done through a laser displacement sensor. However, due to the large amount of fog on the water surface and the long distance, the laser intensity may be interfered with, resulting in low detection accuracy. Therefore, non-contact real-time monitoring is not reliable.

[0036] In a preferred embodiment, the anchoring platform 2 is provided with multiple fixed pulley assemblies 1001 on the side near the anchoring platform 12. The anchoring platform 12 is provided with a force-bearing cross arm 1, and a rotating shaft 101 is provided in the center of the force-bearing cross arm 1. The rotating shaft 101 is rotatably connected to the translation cross arm 106. Multiple cable fixing rods 1002 are provided on the force-bearing cross arm 1. One end of the cable 10 is anchored on the anchoring platform 12, and the other end of the cable 10 passes around the fixed pulley assembly 1001 in a cross-symmetrical arrangement and is connected to the cable fixing rod 1002. At least two displacement sensors 103 are provided on the side of the force-bearing cross arm 1 away from the anchoring platform 2. The displacement sensors 103 are aligned with one side of the force-bearing cross arm 1. A hydraulic cylinder 104 and a fixed support 105 are provided on the anchoring platform 12 near both ends of the force-bearing cross arm 1. One end of the hydraulic cylinder 104 is hinged to the fixed support 105, and the other end of the hydraulic cylinder 104 is hinged to the force-bearing cross arm 1.

[0037] Taking four cables 10 as an example, four fixed pulley assemblies 1001 need to be arranged side by side on the side of the anchoring platform 2 near the anchoring platform 12. One end of the first cable 10 is anchored to the leftmost end of the anchoring platform 12, and the fixed pulley assembly 1001 is connected to the rightmost fixed pulley assembly 1001 on the force-bearing cross arm 1 after passing over the leftmost fixed pulley assembly 1001. One end of the second cable 10 is connected to the upper left end of the anchoring platform 12, and the other end passes over the fixed pulley assembly 1001 at the next leftmost end. The pulley assembly 1001 is connected to the cable fixing rod 1002 at the second right end. One end of the third cable 10 is anchored to the upper right end of the anchoring platform 12, and the other end passes over the fixed pulley assembly 1001 at the second right end to connect to the cable fixing rod 1002 at the second left end. One end of the third cable 10 is anchored to the rightmost end of the anchoring platform 12, and the other end passes over the fixed pulley assembly 1001 at the rightmost end to connect to the cable fixing rod 1002 at the leftmost end. That is, the connection points of the fixed pulley assembly 1001 and the two ends of the cable 10 are symmetrically arranged about the axis of rotation of the cable 10. Initially, the side reference planes of the force-bearing cross arm 1 and the anchoring platform 2 are adjusted to be parallel. When the anchoring platform 2 is rotated counterclockwise, the force-bearing cross arm 1 will rotate clockwise, presenting an approximately symmetrical state. By monitoring the state of the force-bearing cross arm 1, the approximate torsion of the anchoring platform 2 can be calculated in reverse.

[0038] A displacement sensor 103 is arranged near each end of the cross arm 1 on the anchoring platform 12. Laser displacement sensors can be used. The sensors are oriented towards the cross arm 1 and the anchoring platform 2. When the cross arm 1 is not installed, the displacement sensor 103 detects the distance to the side of the anchoring platform 2 and adjusts the sensor support so that the distances of the two sensors to the reference plane on the side of the anchoring platform 2 are equal.

[0039] After the load-bearing crossarm 1 is installed, the reference surface on the side of the load-bearing crossarm 1 blocks the laser displacement sensor. At this time, the distance from the reference surface of the load-bearing crossarm 1 is detected, making the distances from the two sensors to the load-bearing crossarm 1 equal. At this time, the reference surface of the load-bearing crossarm 1 and the anchoring platform 2 are parallel.

[0040] When the anchoring platform 2 undergoes a moving-away displacement, it pulls the translational crossbar 106 and the force-bearing crossbar 1 on the anchoring platform 12 on this side, and the distance values ​​detected by the displacement sensors 103 at both ends increase simultaneously.

[0041] When the anchoring platform 2 moves closer to the target, it pulls the translational crossbar 106 and the load-bearing crossbar 1 on the opposite anchoring platform 12. At the same time, the distance values ​​detected by the displacement sensors 103 at both ends of the load-bearing crossbar 1 on the opposite anchoring platform 12 increase.

[0042] When the anchoring platform 2 undergoes torsional displacement, the distance values ​​detected by the displacement sensors 103 at both ends increase and decrease, allowing the calculation of the change in the force-bearing cross arm 1 relative to the initial angle.

[0043] Based on the monitored changes in distance and angle, the control system can direct the hydraulic cylinders 104 at both ends to push out or retract a certain distance, thereby tightening the cable 10 at the displacement end and pulling back the anchoring platform 2.

[0044] In the preferred embodiment, an angle encoder 102 is fitted around the outside of the rotating shaft 101.

[0045] The displacement sensor 103 is relatively easy to debug and can simultaneously measure the distance between the load-bearing cross arm 1 and the anchoring platform 2. However, due to outdoor conditions and the fact that it is non-contact with the load-bearing cross arm 1, the detection effect is easily affected by interference. For example, if the displacement sensor 103 uses a laser sensor, the emitting surface is easily contaminated by dust and water stains, which weakens the light intensity and causes detection failure. Therefore, an angle encoder 102 is installed at the rotating shaft 101 and shielded with a sealing cover. This can detect the rotation angle of the load-bearing cross arm 1 in the same way and is less prone to failure, so it can be used as a backup solution.

[0046] In a preferred embodiment, the load-bearing crossarm 1 is provided with multiple sleeve rods 115, and each sleeve rod 115 has a telescopic sliding rod 114 at both ends. The sliding rod 114 has a top sleeve 113 at its end. The anchoring platform 12 is provided with a U-shaped frame 111, and the U-shaped frame 111 has an inclined block 112. The top sleeve 113 abuts against the inclined block 112. A cavity 116 is provided between the two sliding rods 114 inside the sleeve rod 115. The cavity 116 is used to communicate with the hydraulic system.

[0047] The slide rod 114 is equipped with a piston 110, which fits against the inner wall of the cavity 116 to provide a sliding seal.

[0048] The lateral component of the force of the inclined block 112 against the top sleeve 113 is directed away from the anchoring platform 2, and the sleeve rod 115 has a hydraulic hole on its side wall that communicates with the interior of the cavity 116.

[0049] When adjusting the position of the load-bearing cross arm 1, the top sleeve 113 can slide on the inclined block 112 because the cavity 116 is not completely filled with liquid or the liquid pressure is low. After the hydraulic cylinder 104 adjusts the angle and position of the load-bearing cross arm 1, hydraulic oil is introduced into the cavity 116 and the valve is closed to seal the cavity 116. The top sleeve 113 presses against the inclined block 112 and cannot retract, forming a limiting structure and sharing the force that the anchoring platform 2 should have applied to the hydraulic cylinder 104. Even if the hydraulic cylinder 104 fails to depressurize, the anchoring platform 2 can still be safely held by the limiting engagement.

[0050] In a preferred embodiment, the slide rod 114 and the top sleeve 113 are respectively provided with flange structures, the top sleeve 113 and the slide rod 114 are slidably sleeved together and a plurality of second disc springs 117 are provided between them.

[0051] In the preferred embodiment, the translational crossbar 106 is provided with an arc-shaped waist groove 109, and the sleeve rod 115 passes through the arc-shaped waist groove 109.

[0052] A reinforcing plate is installed on the side of the translation crossbar 106 at the arc-shaped waist groove 109.

[0053] In the preferred embodiment, the cable fixing rod 1002 is slidably connected to the force-bearing cross arm 1, and a locking nut 1004 is provided at one end of the cable fixing rod 1002. A plurality of first disc springs 1003 are provided between the locking nut 1004 and the force-bearing cross arm 1.

[0054] The disc spring allows the top sleeve 113 and the cable fixing rod 1002 to have a certain range of elastic movement, reducing impact and increasing fault tolerance.

[0055] Example 2: A temporary pier device for resisting lateral horizontal forces during the construction of a long-span, ultra-wide double-cable-stayed bridge includes two anchoring platforms 2 and two tension anchoring platforms 12; horizontal bracing 5 and inclined bracing 3 connect the two anchoring platforms 2 into a whole; jacks 11 apply prestress to the cables 10 through reaction seats 14 to connect the tension anchoring platforms 12 and the anchoring platforms 2 into a complete system.

[0056] The four steel pipe piles 4 are connected by multiple horizontal bracing 5 and diagonal bracing 3. The top of the steel pipe piles is welded with pile caps 6, and the distribution beams 7 are welded above the pile caps 6. Each anchoring platform 2 is equipped with two sets of ear-seat connection systems 8, a thrust seat 15, and a cable anchor head used in conjunction with the anchoring platform 12.

[0057] A lug plate needs to be welded to both the main steel beam 9 and the anchoring platform 2. A lug plate 16 needs to be installed at the weld joint of the main steel beam lug plate 19 to reinforce the structure and prevent damage to the main steel beam 9 during construction. The main steel beam lug plate 19 and the anchoring platform lug plate 20 also need to be used in conjunction with a tie plate 18 and a pin 17.

[0058] At least four steel pipe piles 4 are driven on the outside of the anchoring platform 2, and pile caps 6 are welded to the top of the steel pipe piles. A distribution beam is welded above the pile caps 6. The reaction seat 14 and the cable anchor head on the anchoring platform 2 are connected by applying prestress to the cable 10 through the jack 11.

[0059] The reaction seat 14 and the cable anchor head are processed and welded to the anchoring platform 12 and the anchoring platform 2 using H-beams, and are used with the help of jacks 11 and anchorages.

[0060] Cable 10 is composed of 6-Ø15.2 steel strands with a tensile strength of 1860 MPa.

[0061] The thrust seat 15 includes a steel main beam stiffening plate 21, a main beam baffle 22, a rubber pad 23, and a thrust seat stiffening plate 24. After the thrust seat 15 is assembled, it is temporarily placed on the distribution beam 7. After the main beam baffle 22 and the rubber pad 23 are installed in place, the thrust seat 15 is moved into place and welded and fixed.

[0062] Before the cantilevered steel main beam is installed to the temporary pier device resisting lateral horizontal forces, the anchoring platform and tie-anchor platform must be constructed. Two sets of lug connection systems are symmetrically installed on each anchoring platform. The lug connection systems on the steel main beam must be welded in advance. After the two stay cables are completed, the pins are passed through the tie plates and lug plates to connect the steel main beam to the anchoring platform. Prestress is applied to the stay cables based on calculations according to the actual site conditions. The lateral horizontal force generated by the crosswind acting on the steel main beam and stay cables is transmitted to the temporary pier device resisting lateral horizontal forces, composed of the anchoring platform, tie-anchor platform, and stay cables, through the lug connection system and thrust bearings.

[0063] The specific steps for constructing the temporary pier device are as follows: Step 1: According to the design requirements, temporary piers to resist lateral horizontal forces are installed at the corresponding locations of the long-span, ultra-wide double-cable-stayed bridge. Before the main beam cantilever is installed to the location of the temporary piers to resist lateral horizontal forces, the area of ​​steel pipe pile 4 is accurately measured. A floating crane with a vibratory hammer is used to drive the steel pipe piles 4 of the anchoring platform 2 and the anchoring platform 12 to the design elevation. The inclined supports 3 and the horizontal bracing 5 are used to form a stable structure. The distribution beam 7 is connected to the steel pipe pile 4 through the pile cap 6 at the top of the steel pipe pile 4. At the same time, the steel main beam ear plate 19 of the ear-seat connection system 8, the anchoring platform ear plate 20, the tie plate 18, the pin 17, the anchor head 13, the cable 10, the reaction seat 14, the jack 11, and the thrust seat 15 of the anchoring system need to be processed or procured simultaneously in the back-end.

[0064] Step 2: Transport the lug connecting system 8 above the anchoring platform 2 and the reaction seat 14 of the anchoring platform 12 to the site and weld and install them as required; assemble the thrust seat 15 and place it on the anchoring platform 2.

[0065] Step 3: For the steel main beam 9 at the temporary pier device to resist lateral horizontal force, the stiffening plate 16 of the lug connection system 8 and the stiffening plate 21 of the thrust seat 15 at the steel main beam 9 need to be welded in place in advance during the factory processing stage.

[0066] Step 4: Install the steel main beam 9 at the temporary pier device to resist lateral horizontal forces, weld the ear plates at the steel beam, and install the thrust seat rubber pad 23.

[0067] Step 5: After the thrust seat 15 is assembled, it is temporarily placed on the distribution beam 7. After the main beam baffle 22 and rubber pad 23 are installed in place, the thrust seat 15 is moved laterally into place and welded and fixed.

[0068] Step 6: After the ear plate of the ear seat connection system 8 is installed in place, drill the tie plate 18 to match it with the steel main beam ear plate 19 and the anchoring platform ear plate 20, insert the pin 17 into the steel main beam ear plate 19, the anchoring platform ear plate 20 and the tie plate 18 and lock them with pins.

[0069] Step 7: Fix the cable 10 to the anchor head 13 and insert it into the reaction seat 14. Apply prestress to the theoretical value with the jack 11 to form a stable device that resists horizontal forces.

[0070] Step 8: After the main steel beam 9 is closed, remove the temporary piers that resist the lateral horizontal force to bring the main beam structure to the design state.

[0071] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A temporary pier device for a long-span, ultra-wide double-cable-stayed bridge, characterized in that: It includes at least two anchoring platforms (2), with a distribution beam (7) at the top of the anchoring platform (2). The distribution beam (7) is used to connect the steel main beam (9). The anchoring platforms (2) are connected by a horizontal bracing (5) to form a temporary load-bearing platform. Anchoring platforms (12) are provided on both sides of the temporary load-bearing platform, and a cable (10) is also provided. The two ends of the cable (10) are connected to the temporary load-bearing platform and the anchoring platform (12) respectively. There are multiple cables (10). The anchoring platform (12) is equipped with a slide rail device (107) and a translational crossbar (106). The translational crossbar (106) is slidably connected to the slide rail device (107). The translational crossbar (106) is equipped with a force-bearing crossbar (1). One end of each cable (10) is connected to the force-bearing crossbar (1). The force-bearing crossbar (1) moves away from the anchoring platform (2) to tighten the cable (10). The anchoring platform (2) is provided with multiple fixed pulley assemblies (1001) on one side near the anchoring platform (12). The force-bearing cross arm (1) is provided with a rotating shaft (101) in the center. The rotating shaft (101) is rotatably connected to the translation cross arm (106). Multiple cable fixing rods (1002) are provided on the force-bearing cross arm (1). One end of the cable (10) is anchored to the anchoring platform (12). The other end of the cable (10) passes around the fixed pulley assembly (1001) and is arranged in a cross-symmetrical manner with the cable fixing rod (1002). 02) Connection: At least two displacement sensors (103) are provided on the side of the force-bearing cross arm (1) on the anchoring platform (12) away from the anchoring platform (2). The displacement sensors (103) are aligned with one side of the force-bearing cross arm (1). A hydraulic cylinder (104) and a fixed support (105) are provided on the anchoring platform (12) near both ends of the force-bearing cross arm (1). One end of the hydraulic cylinder (104) is hinged to the fixed support (105), and the other end of the hydraulic cylinder (104) is hinged to the force-bearing cross arm (1).

2. The temporary pier device for a long-span, ultra-wide double-cable-stayed bridge according to claim 1, characterized in that: Both the anchoring platform (2) and the anchoring platform (12) include multiple vertically arranged steel pipe piles (4), each steel pipe pile (4) has a pile cap (6) at the top, and the distribution beam (7) is connected to the pile cap (6).

3. The temporary pier device for a long-span, ultra-wide double-cable-stayed bridge according to claim 1, characterized in that: An angle encoder (102) is fitted on the outside of the rotating shaft (101).

4. The temporary pier device for a long-span, ultra-wide double-cable-stayed bridge according to claim 1, characterized in that: Multiple sleeves (115) are provided on the load-bearing cross arm (1). The sleeves (115) have telescopic sliding rods (114) at both ends. The sliding rods (114) have top sleeves (113) at their ends. The anchoring platform (12) has a U-shaped frame (111). The U-shaped frame (111) has inclined blocks (112). The top sleeves (113) abut against the inclined blocks (112). A cavity (116) is provided between the two sliding rods (114) inside the sleeve (115). The cavity (116) is used to connect with the hydraulic system.

5. The temporary pier device for a long-span, ultra-wide double-cable-stayed bridge according to claim 4, characterized in that: The slide rod (114) and the top sleeve (113) are respectively provided with flange structures. The top sleeve (113) and the slide rod (114) are slidably connected and multiple second disc springs (117) are provided between them.

6. The temporary pier device for a long-span, ultra-wide double-cable-stayed bridge according to claim 1, characterized in that: The translation crossbar (106) is provided with an arc-shaped waist groove (109), and the sleeve rod (115) passes through the arc-shaped waist groove (109).

7. The temporary pier device for a long-span, ultra-wide double-cable-stayed bridge according to claim 1, characterized in that: The cable fixing rod (1002) is slidably connected to the force-bearing cross arm (1). One end of the cable fixing rod (1002) is provided with a locking nut (1004). Multiple first disc springs (1003) are provided between the locking nut (1004) and the force-bearing cross arm (1).

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