A device and method for dismantling steel strand cable stays

Abstract

This invention discloses a device and method for dismantling a steel strand cable-stayed bridge, relating to the field of bridge construction technology. The device includes a platform and a hydraulic tensioning assembly for releasing the steel strand. One end of the hydraulic tensioning assembly is provided with a rotating component rotatably connected to the platform. A first jack is provided between the hydraulic tensioning assembly and the platform to allow the hydraulic tensioning assembly to rotate around the rotating component. The hydraulic tensioning assembly includes a first anchor and a second anchor for anchoring the steel strand, and a hydraulic telescopic component disposed between the first and second anchors to release internal stress in the steel strand between the first and second anchors. This embodiment integrates all components for dismantling the cable-stayed bridge steel strand onto the platform, resulting in a compact and space-saving structure. Simultaneously, it allows for tensioning and cutting operations at the beam end, further improving the safety during the dismantling process.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a device and method for removing steel strand cable stays. Background Technology

[0002] Steel strand stay cables are high-strength prestressed components commonly used in cable-stayed bridges and other large bridge structures. They are composed of multiple high-strength steel wires twisted together, possessing excellent tensile strength and durability, capable of withstanding the enormous loads of bridges. The replacement and maintenance of steel strand stay cables are crucial for ensuring the long-term safe operation of bridges. Because stay cables are subjected to dynamic loads and environmental erosion over long periods, they may experience fatigue, corrosion, or damage, thus requiring regular inspection, maintenance, and replacement when necessary. Looking at the historical development of cable-stayed bridges in my country, most steel strand stay cables have been in service for a considerable time and have entered their replacement cycle.

[0003] There are two main methods for releasing tension on steel strand stay cables: tower-end operation and beam-end tensioning and cutting. The former is limited by operating space and the safety of working at heights, leading the industry to gradually abandon its use. In recent years, more and more practitioners have adopted the beam-end tensioning and cutting method, but most methods remain inefficient. Therefore, considering the current state of construction in the industry, researching an efficient and safe method for releasing tension on beam-end stay cables is of great significance. Summary of the Invention

[0004] This application provides a device and method for dismantling steel strand stay cables, which can solve the technical problem of low safety in the tensioning construction of steel strand stay cables in the prior art.

[0005] In a first aspect, embodiments of this application provide a steel strand cable dismantling device, comprising: a platform; a hydraulic tensioning assembly for releasing the steel strand, one end of the hydraulic tensioning assembly being provided with a rotating component rotatably connected to the platform, and a first jack being provided between the hydraulic tensioning assembly and the platform for realizing the rotation of the hydraulic tensioning assembly around the rotating component; wherein, the hydraulic tensioning assembly includes a first anchor and a second anchor for anchoring the steel strand, and a hydraulic telescopic assembly disposed between the first anchor and the second anchor to realize the release of internal stress in the steel strand between the first anchor and the second anchor.

[0006] In conjunction with the first aspect, in one embodiment, the system further includes: a second jack and a third jack located on the platform, the hydraulic tensioning assembly being disposed between the second jack and the third jack; a first hook and a second hook for separating the strand to be tensioned from the strand bundle, the first hook being disposed at the end of the second jack away from the platform, and the second hook being disposed at the end of the third jack away from the platform.

[0007] In conjunction with the first aspect, in one embodiment, the end of the first hook connected to the steel strand, the hydraulic unwinding assembly, and the end of the second hook connected to the steel strand are arranged sequentially along the inclined direction of the steel strand.

[0008] In conjunction with the first aspect, in one embodiment, the hydraulic telescopic assembly includes: a piston rod, one end of which is fixedly connected to the first anchor; a hydraulic cylinder sleeved outside the piston rod, the end of which is fixedly connected to the second anchor; and a hydraulic side plate fixedly connected to the hydraulic cylinder; wherein the rotating component includes a rotating shaft and a rotating plate, the rotating plate being disposed on the side of the hydraulic side plate facing the platform, and the rotating plate having a through hole for the rotating shaft to pass through.

[0009] In conjunction with the first aspect, in one embodiment, it further includes: a first support fixedly connected to the platform, wherein the end of the first support away from the platform has a rotation hole for the rotating shaft to pass through; and a second support fixedly connected to the platform, wherein the end of the second support away from the platform is fixedly connected to the first jack.

[0010] In conjunction with the first aspect, in one embodiment, it further includes: a guide rod, one end of which is fixedly connected to the first anchor, and the other end of which passes through a guide hole opened in the second anchor.

[0011] In conjunction with the first aspect, in one embodiment, it further includes: a platform telescopic assembly, one end of which is slidably connected to the side of the platform away from the hydraulic release assembly; and a moving assembly, the inner sidewall of which is provided with a slide rail for the platform telescopic assembly to slide, and the outer sidewall of which is provided with a pulley for the platform to move.

[0012] In conjunction with the first aspect, in one embodiment, the first anchor has a first anchoring hole, and the first anchor further includes a first clamping piece clamped on both sides of the first anchoring hole, with a first locking hole formed between the first clamping piece and the first anchoring hole for the steel strand to pass through; the second anchor has a second anchoring hole, and the second anchor further includes a second clamping piece clamped on both sides of the second anchoring hole, with a second locking hole formed between the second clamping piece and the second anchoring hole for the steel strand to pass through; wherein the first locking hole and the second locking hole are aligned.

[0013] Secondly, this application provides a method for dismantling a steel strand cable-stayed bridge, based on the steel strand cable-stayed bridge dismantling device described in any of the above embodiments, comprising: lifting the steel strand to be released and separating it from the steel strand bundle; adjusting the first jack so that the hydraulic release assembly is parallel to the steel strand to be released; anchoring the steel strand to be released between the first anchor and the second anchor; tightening the hydraulic release assembly to release the internal stress of the steel strand to be released; and cutting the steel strand to be released after the internal stress has been released.

[0014] In conjunction with the second aspect, in one embodiment, after cutting the steel strand to be released after releasing internal stress, the method further includes: restoring the hydraulic telescopic assembly to the extended state to release the internal stress of the segment connecting the tower end and the beam end of the steel strand bundle containing the steel strand to be released.

[0015] The beneficial effects of the technical solutions provided in this application include:

[0016] In this embodiment, all components for dismantling the stay cable strands are integrated onto a platform, resulting in a compact and space-saving structure. Simultaneously, tensioning and cutting operations are performed at the beam ends. Compared to traditional stay cable strand dismantling, which requires construction at the tower end, this avoids the difficulties of operation in confined space, the dangers of high-altitude work, reduces the number of construction workers and labor intensity, and further improves the safety of the stay cable strand dismantling process. In this embodiment, once the initial position and angle are adjusted when working on the same stay cable, repeated adjustments are unnecessary. When working on different stay cables in the same sector, only the angle of the hydraulic tensioning component needs to be adjusted using the first jack, thereby greatly improving construction efficiency and reducing construction costs. In this embodiment, the hydraulic telescopic component, the first anchor, and the second anchor are set as an integrated structure. Compared to existing separate structures, the hydraulic tensioning component structure disclosed in this embodiment is simpler, resulting in a lower failure rate and lower maintenance costs in case of failure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the steel strand cable removal device provided in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the hydraulic unwinding assembly provided in the embodiments of this application;

[0020] Figure 3 A flowchart illustrating the method for dismantling a steel strand cable-stayed bridge as provided in this application embodiment.

[0021] In the diagram: 1. Platform; 2. Hydraulic tensioning assembly; 21. First anchor; 22. Second anchor; 23. Hydraulic telescopic assembly; 231. Piston rod; 232. Hydraulic cylinder; 233. Hydraulic side plate; 24. Rotating plate; 25. Guide rod; 3. First jack; 4. Second jack; 5. Third jack; 6. First hook; 7. Second hook; 8. Steel strand; 9. First support; 10. Second support; 11. Platform telescopic assembly; 111. Telescopic component; 112. Telescopic rod; 12. Moving assembly; 121. Slide rail; 122. Pulley; 13. First clamp; 14. Second clamp. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0023] This application provides a device and method for dismantling steel strand stay cables, which can solve the technical problem of low safety in the tensioning construction of steel strand stay cables in the prior art.

[0024] Figure 1 This is a schematic diagram of the structure of the steel strand cable removal device provided in the embodiments of this application. Figure 2 This is a schematic diagram of the structure of the hydraulic tensioning assembly provided in an embodiment of this application.

[0025] Reference Figure 1 and Figure 2 This application provides a steel strand cable dismantling device, comprising: a platform 1; a hydraulic tensioning assembly 2 for tensioning the steel strand 8, one end of the hydraulic tensioning assembly 2 being provided with a rotating component rotatably connected to the platform 1, and a first jack 3 for realizing the rotation of the hydraulic tensioning assembly 2 around the rotating component being provided between the hydraulic tensioning assembly 2 and the platform 1; wherein, the hydraulic tensioning assembly 2 includes a first anchor 21 and a second anchor 22 for anchoring the steel strand 8, and a hydraulic telescopic assembly 23 disposed between the first anchor 21 and the second anchor 22 to realize the release of internal stress in the steel strand 8 between the first anchor 21 and the second anchor 22.

[0026] Specifically, the steel strand cable removal device provided in this embodiment is installed at the beam end. The hydraulic telescopic component 23 is initially in the extended state. After the steel strand 8 to be released is anchored by the first anchor 21 and the second anchor 22, the hydraulic telescopic component 23 gradually begins to retract. At this time, the distance between the first anchor 21 and the second anchor 22 becomes closer and closer as the hydraulic telescopic component 23 extends and retracts. Therefore, the steel strand 8 anchored between the first anchor 21 and the second anchor 22 gradually changes from a tensioned state to a relaxed state, and the internal stress of the steel strand 8 is slowly released to zero. At this time, a cutting tool is used to cut the steel strand 8 located between the first anchor 21 and the second anchor 22.

[0027] After the steel strand 8 is cut, the hydraulic telescopic assembly 23 gradually returns to its extended state. At this time, the internal stress in the segment connecting the tower end and the beam end of the bundle of steel strand 8 is released, and the tensioning operation of the bundle of steel strand 8 is completed. The cutting tool can be an angle grinder, hydraulic shears, or other tools, and there is no limitation here.

[0028] In this embodiment, all components for dismantling the cable-stayed steel strands are integrated on platform 1, resulting in a compact structure that saves space. Simultaneously, tensioning and cutting operations are performed at the beam ends. Compared to traditional cable-stayed steel strand dismantling, which requires construction at the tower end, this avoids the difficulties of operation due to limited space, the dangers of working at heights, reduces the number of construction workers and labor intensity, and further improves the safety of the cable-stayed steel strand dismantling process.

[0029] This application embodiment also includes: a second jack 4 and a third jack 5 located on the platform 1, a hydraulic tensioning assembly 2 disposed between the second jack 4 and the third jack 5; a first hook 6 and a second hook 7 for separating the steel strand 8 to be tensioned from the steel strand bundle, the first hook 6 being disposed at the end of the second jack 4 away from the platform 1, and the second hook 7 being disposed at the end of the third jack 5 away from the platform 1.

[0030] Specifically, the first jack 3, the second jack 4, and the third jack 5 are all manual jacks. The first claw 6 and the second claw 7 are connected to the top of the second jack 4 and the third jack 5 respectively by pins. The steel strand 8 hooked by the first claw 6 and the second claw 7 is separated from the other steel strands 8 by hand cranking the lever. The top surface of the hydraulic tensioning assembly 2 is made parallel to the steel strand 8 by manually adjusting the first jack 3.

[0031] In this embodiment, the end of the first hook 6 connected to the steel strand 8, the hydraulic release assembly 2, and the end of the second hook 7 connected to the steel strand 8 are arranged sequentially along the inclined direction of the steel strand 8.

[0032] Specifically, the height of the second jack 4 is greater than the height of the third jack 5, which allows the cable-stayed strand removal device provided in this embodiment to adapt to different inclinations of the cable-stayed strands. Meanwhile, the first jack 3, the second jack 4, and the third jack 5 are all manual jacks. Manual jacks typically have a simple structure and no complex electronic or mechanical components, resulting in a low failure rate and greater reliability. When working on the same cable-stayed strand, after adjusting the initial position and angle using the second jack 4 and the third jack 5, no further adjustments are needed. When working on different cables within the same sector, only the angle of the hydraulic tensioning component 2 needs to be adjusted using the first jack 3. This significantly improves construction efficiency and reduces construction costs.

[0033] In this embodiment, the hydraulic telescopic assembly 23 includes: a piston rod 231, one end of which is fixedly connected to a first anchor 21; a hydraulic cylinder 232 sleeved outside the piston rod 231, one end of which is fixedly connected to a second anchor 22; and a hydraulic side plate 233 fixedly connected to the hydraulic cylinder 232; wherein the rotating component includes a rotating shaft and a rotating plate 24, the rotating plate 24 being disposed on the side of the hydraulic side plate 233 facing the platform 1, and the rotating plate 24 having a through hole for the rotating shaft to pass through.

[0034] Specifically, the piston rod 231 is initially extended from the hydraulic cylinder 232. After the first anchor 21 and the second anchor 22 anchor the steel strand 8 to be released, the piston rod 231 gradually retracts into the hydraulic cylinder 232 under the action of the hydraulic cylinder 232. At this time, the distance between the first anchor 21 and the second anchor 22 gets closer and closer as the piston rod 231 retracts. The hydraulic side plate 233 can not only support the first jack 3 to adjust the angle of the hydraulic release assembly 2, but also support the hydraulic release assembly 2 to rotate around the platform 1.

[0035] In this embodiment, the hydraulic telescopic component 23, the first anchor 21, and the second anchor 22 are set as an integrated structure. Compared with the existing separate structure, the hydraulic tensioning component 2 disclosed in this embodiment has a simpler structure, resulting in a lower failure rate and lower maintenance costs when a failure occurs.

[0036] In this embodiment, it further includes: a first support 9 fixedly connected to the platform 1, the first support 9 having a rotating hole at the end away from the platform 1 for the rotating shaft to pass through; and a second support 10 fixedly connected to the platform 1, the second support 10 being fixedly connected at the end away from the platform 1 to the first jack 3.

[0037] Specifically, the first support 9 is a hinged support, and the rotating shaft is a pin. The pin passes through the rotating hole and the through hole so that the hydraulic tensioning assembly 2 can rotate around the first support 9, thereby adjusting the angle of the hydraulic tensioning assembly 2.

[0038] In this embodiment of the application, it also includes: a guide rod 25, one end of which is fixedly connected to the first anchor 21, and the other end of which passes through the guide hole opened in the second anchor 22.

[0039] Specifically, both the first anchor 21 and the second anchor 22 are square plate-shaped structures. Four guide rods 25 are provided at the four corners of the first anchor 21, and four guide holes are opened at the corresponding positions of the second anchor 22. When the piston rod 231 extends and retracts, the guide rods 25 can improve the stability of the hydraulic tensioning assembly 2 during tensioning construction, and the hydraulic tensioning assembly 2 has a certain load-bearing capacity.

[0040] In this embodiment of the application, it further includes: a platform telescopic component 11, one end of which is slidably connected to the side of the platform 1 away from the hydraulic release component 2; and a moving component 12, the inner side wall of which is provided with a slide rail 121 for the platform telescopic component 11 to slide, and the outer side wall of which is provided with a pulley 122 for the platform 1 to move.

[0041] Specifically, the platform telescopic assembly 11 includes a telescopic component 111 and telescopic rods 112. The telescopic component 111 is a hydraulic cylinder, and the telescopic rods 112 include multiple pairs. Under the action of the hydraulic cylinder, the multiple pairs of telescopic rods 112 will move crosswise in the slide rail 121. When the telescopic rods 112 extend, the height of the platform 1 increases; when the telescopic rods 112 retract, the height of the platform 1 decreases. Thus, the height of the hydraulic tensioning assembly 2 on the platform 1 can be flexibly adjusted to accommodate cable strands of different heights or inclinations.

[0042] The pulley 122 allows the steel strand cable removal device provided in this embodiment to move easily on the beam surface, enabling operation at any position on the beam surface. Compared to traditional steel strand removal, which requires construction at the tower end, this avoids difficulties in operation due to limited space, the dangers of working at height, and reduces the number of construction workers and labor intensity. Simultaneously, the moving component 12 also includes a handle, allowing construction workers to easily move the entire steel strand cable removal device.

[0043] In this embodiment, the first anchor 21 has a first anchoring hole and further includes a first clamping piece 13 clamped on both sides of the first anchoring hole, and a first locking hole for the steel strand 8 to pass through is formed between the first clamping piece 13 and the first anchoring hole; the second anchor 22 has a second anchoring hole and further includes a second clamping piece 14 clamped on both sides of the second anchoring hole, and a second locking hole for the steel strand 8 to pass through is formed between the second clamping piece 14 and the second anchoring hole; wherein the first locking hole and the second locking hole are aligned.

[0044] Specifically, the diameters of the first locking hole and the second locking hole are smaller than the cross-sectional diameter of the steel strand 8 to achieve clamping and anchoring of the steel strand 8. By adjusting the first jack 3 or the platform telescopic assembly 11, the steel strand 8 to be released falls into the first anchoring hole and the second anchoring hole, and then the first clamping piece 13 and the second clamping piece 14 are inserted to achieve clamping and anchoring of the steel strand 8 to be released.

[0045] This application embodiment integrates all components for dismantling the stay cable strands onto a platform, resulting in a compact and space-saving structure. Simultaneously, it facilitates tensioning and cutting operations at the beam ends. Compared to traditional stay cable strand dismantling, which requires construction at the tower end, this avoids the difficulties of operation in confined spaces, the dangers of high-altitude work, reduces the number of construction workers and labor intensity, and further improves the safety of the stay cable strand dismantling process. Furthermore, this application embodiment eliminates the need for repeated adjustments after adjusting the initial position and angle when working on the same stay cable. When working on different stay cables within the same sector, only the angle of the hydraulic tensioning component needs to be adjusted using the first jack, thereby significantly improving construction efficiency and reducing construction costs. This application embodiment sets the hydraulic telescopic component, the first anchor, and the second anchor as an integrated structure. Compared to existing separate structures, the hydraulic tensioning component structure disclosed in this application embodiment is simpler, resulting in a lower failure rate and lower maintenance costs in case of failure.

[0046] Secondly, embodiments of this application provide a method for dismantling a steel strand stay cable, based on the steel strand stay cable dismantling device described in any of the above embodiments. Figure 3 A flowchart illustrating the method for dismantling a steel strand cable-stayed bridge as provided in this application embodiment. See also... Figure 3 It includes the following steps:

[0047] In step S1, the steel strand to be released is lifted and separated from the steel strand bundle. The first jack 3 is adjusted so that the hydraulic tensioning assembly 2 is parallel to the steel strand to be released.

[0048] Specifically, step S1 includes:

[0049] In step S101, the hydraulic tensioning assembly 2 is positioned between the second jack 4 and the third jack 5 on the platform 1. The first hook 6 and the second hook 7 are connected to the top ends of the second jack 4 and the third jack 5 respectively via pins. The steel strands hooked by the first hook 6 and the second hook 7 are separated from the remaining steel strands by a hand crank lever.

[0050] In step S102, the hydraulic tensioning assembly 2 is installed. The hydraulic tensioning assembly 2 rotates around the platform 1 via a rotating component to adjust the angle of the hydraulic tensioning assembly 2.

[0051] In step S103, the first jack 3, which is fixedly connected to the hydraulic tensioning assembly 2, is actuated so that the hydraulic tensioning assembly 2 is parallel to the steel strand to be tensioned.

[0052] In step S2, the steel strand to be released is anchored between the first anchor 21 and the second anchor 22, the hydraulic release assembly 2 is tightened to release the internal stress of the steel strand to be released, and the steel strand to be released after the internal stress is released is cut.

[0053] Specifically, step S2 includes:

[0054] In step S201, the steel strand to be released is anchored between the first anchor 21 and the second anchor 22 of the hydraulic release assembly 2.

[0055] In step S202, the hydraulic tensioning assembly 2 is tightened to release the internal stress of the steel strand located between the first anchor 21 and the second anchor 22.

[0056] In step S203, the steel strands are cut after the internal stress has been released.

[0057] After cutting the steel strand to be released after the internal stress has been released, the process also includes:

[0058] In step S204, the hydraulic telescopic component 23 is restored to its extended state, releasing the internal stress in the segments connecting the tower end and the beam end of the steel strand bundle containing the strand to be released. At this point, the release operation of the steel strand bundle is complete.

[0059] Repeat steps S1-S2 above to complete the tensioning of the remaining steel strands to be tensioned.

[0060] In conjunction with the second aspect, in the embodiments of this application, before lifting the strand to be released, the method further includes: stripping the outer sheath of the stay cable near the anchoring end of the beam to expose the strand bundle containing the strand to be released.

[0061] Specifically, the PE sheath of the cable to be constructed is cut off to expose the steel strand bundle inside.

[0062] For related components and their implementations not mentioned in this embodiment, please refer to the above embodiments, and they will not be repeated here.

[0063] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0064] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for dismantling a steel strand cable-stayed bridge, characterized in that, include: Platform (1); A hydraulic tensioning assembly (2) for tensioning the steel strand (8) is provided at one end of the hydraulic tensioning assembly (2) and is rotatably connected to the platform (1). A first jack (3) is provided between the hydraulic tensioning assembly (2) and the platform (1) to enable the hydraulic tensioning assembly (2) to rotate around the rotatable component. The second jack (4) and the third jack (5) are located on the platform (1), and the hydraulic tensioning assembly (2) is located between the second jack (4) and the third jack (5); A first hook (6) and a second hook (7) are used to separate the steel strand (8) to be released from the bundle of steel strand (8). The first hook (6) is located at the end of the second jack (4) away from the platform (1), and the second hook (7) is located at the end of the third jack (5) away from the platform (1). The moving component (12) has pulleys (122) on its outer side wall for the platform (1) to move. The hydraulic tensioning assembly (2) includes a first anchor (21) and a second anchor (22) for anchoring the steel strand (8), and a hydraulic telescopic assembly (23) disposed between the first anchor (21) and the second anchor (22) to release the internal stress of the steel strand (8) between the first anchor (21) and the second anchor (22).

2. The steel strand cable-stayed bridge dismantling device according to claim 1, characterized in that, The first hook (6) connected to the steel strand (8), the hydraulic tensioning assembly (2), and the second hook (7) connected to the steel strand (8) are arranged sequentially along the inclined direction of the steel strand (8).

3. The steel strand cable-stayed bridge dismantling device according to claim 1, characterized in that, The hydraulic telescopic assembly (23) includes: A piston rod (231), one end of which is fixedly connected to the first anchor (21); A hydraulic cylinder (232) is sleeved outside the piston rod (231), and one end of the hydraulic cylinder (232) away from the piston rod (231) is fixedly connected to the second anchor (22); A hydraulic side plate (233) is fixedly connected to the hydraulic cylinder (232); wherein the rotating component includes a rotating shaft and a rotating plate (24), the rotating plate (24) is disposed on the side of the hydraulic side plate (233) facing the platform (1), and the rotating plate (24) has a through hole for the rotating shaft to pass through.

4. The steel strand cable-stayed bridge dismantling device according to claim 3, characterized in that, Also includes: A first support (9) is fixedly connected to the platform (1), and a rotating hole is provided at the end of the first support (9) away from the platform (1) for the rotating shaft to pass through; A second support (10) is fixedly connected to the platform (1), and the end of the second support (10) away from the platform (1) is fixedly connected to the first jack (3).

5. The steel strand cable-stayed bridge dismantling device according to claim 1, characterized in that, Also includes: Guide rod (25), one end of which is fixedly connected to the first anchor (21), and the other end of which passes through the guide hole opened in the second anchor (22).

6. The steel strand cable-stayed bridge dismantling device according to claim 1, characterized in that, Also includes: Platform telescopic assembly (11), one end of which is slidably connected to the side of the platform (1) away from the hydraulic release assembly (2), and the inner wall of the moving assembly (12) is provided with a slide (121) for the platform telescopic assembly (11) to slide.

7. The steel strand cable-stayed bridge dismantling device according to claim 1, characterized in that, The first anchor (21) has a first anchor hole and also includes a first clamping piece (13) clamped on both sides of the first anchor hole. A first locking hole is formed between the first clamping piece (13) and the first anchor hole for the steel strand (8) to pass through. The second anchor (22) has a second anchor hole and also includes a second clamping piece (14) clamped on both sides of the second anchor hole. A second locking hole is formed between the second clamping piece (14) and the second anchor hole for the steel strand (8) to pass through. The first locking hole is aligned with the second locking hole.

8. A method for dismantling a steel strand cable-stayed bridge, based on the steel strand cable-stayed bridge dismantling device according to any one of claims 1-7, characterized in that, include: Pick up the strand to be released and separate it from the strand bundle. Adjust the first jack (3) so that the hydraulic release assembly (2) is parallel to the strand to be released. Anchor the steel strand to be released between the first anchor (21) and the second anchor (22), tighten the hydraulic release assembly (2) to release the internal stress of the steel strand to be released, and cut the steel strand to be released after the internal stress has been released.

9. The method for dismantling a steel strand cable-stayed bridge according to claim 8, characterized in that, After cutting the steel strand to be released after the internal stress has been released, the process also includes: The hydraulic telescopic assembly (23) is restored to the extended state, releasing the internal stress in the segment connecting the tower end and the beam end of the steel strand bundle containing the steel strand to be released.

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