Box girder closure opening vibration relieving control device and method

Abstract

The invention relates to a box girder closure opening vibration relieving control device and method, and the device comprises an outrigger which is used for being connected with a box girder top plate, and one end of the outrigger in the length direction extends to the position above a box girder closure opening relieving face to form a tensioning end; the counter-force supporting beam is arranged above the tensioning end of the cantilever beam; the force transmission supporting rod sequentially penetrates through the counter-force supporting beam and the cantilever beam tensioning end in the vertical direction and is used for being connected with a box beam top plate; the fixed end of the first hydraulic jack is arranged at the tensioning end of the cantilever beam, and the piston end of the first hydraulic jack continuously abuts against the counter-force supporting beam in the vertical direction; the fixed end of the second hydraulic jack is used for being connected with the box girder closure opening releasing face, and the piston end of the second hydraulic jack continuously abuts against the outrigger in the vertical direction. The problem that in the prior art, when a closure opening is removed, a continuous beam notch is prone to breakage, and then construction safety accidents are caused can be solved.

Description

Technical Field

[0001] This application relates to the field of bridge manufacturing, and in particular to a device and method for relieving vibration at the closure joint of a box girder. Background Technology

[0002] When closure is performed on a continuous box girder, forced closure is usually required due to the height difference at the closure joint. After the bridge construction is completed, the forcibly closed continuous girder must be dismantled.

[0003] When the closure joint is released, there is a risk of sudden breakage between the closure joint surface of the box girder and the top plate of the box girder at the closure joint. The impact force generated by the breakage will seriously affect the structural safety, cause construction safety accidents, and result in loss of life and property. Summary of the Invention

[0004] This application provides a vibration control device and method for releasing the closure joint of a box girder, in order to solve the problem in the related art that when releasing the closure joint, the closure surface of the box girder and the top plate of the box girder are prone to breakage, which may lead to construction safety accidents.

[0005] Firstly, a vibration control device for the closing joint of a box girder is provided, comprising: The cantilever beam is used to connect with the top plate of the box girder, and one end of its length extends above the release surface of the box girder's closing joint to form a tension end; A reaction support beam is disposed above the tensioning end of the cantilever beam; The force transmission support rod passes through the reaction support beam and the tensioning end of the cantilever beam in sequence along the vertical direction, and is used to connect with the top plate of the box girder; The first hydraulic jack has its fixed end located on the tensioning end of the cantilever beam, and its piston end can extend toward the reaction support beam until it abuts against the reaction support beam. In addition, a second hydraulic jack, the fixed end of which is used to connect with the disengagement surface of the box girder closing opening, and the piston end of which can extend toward the cantilever beam until it presses against the cantilever beam.

[0006] In conjunction with the first aspect, in one embodiment, a vibration control device for the box girder closure joint further includes: Anchor bolts are provided on the force transmission support rod, and bolt holes for connection with the anchor bolts are provided on both the reaction support beam and the cantilever beam. And, adjusting the nut, which is connected to the anchor bolt.

[0007] In conjunction with the first aspect, in one embodiment, a vibration control device for the box girder closure joint further includes: The first anchoring beam is used to connect with the uncoupling surface of the box girder and through which the force transmission support rod passes.

[0008] In conjunction with the first aspect, in one embodiment, a vibration control device for the closing joint of a box girder further includes: An anchoring assembly is provided at one end of the cantilever beam away from the tensioning end along its length, and at least one such anchoring assembly is provided. The anchoring assembly is used to connect to the top plate of the box girder.

[0009] In conjunction with the first aspect, in one embodiment, the anchoring assembly includes: An anchoring pier is located between the cantilever beam and the top plate of the box girder, with its two ends in the height direction connected to the cantilever beam and the top plate of the box girder, respectively.

[0010] In conjunction with the first aspect, in one embodiment, the anchoring assembly further includes: An anchoring tie rod, which passes through the cantilever beam and the anchoring support in a vertical direction, and is used to penetrate the top slab of the box girder.

[0011] In conjunction with the first aspect, in one embodiment, the anchoring assembly includes: The second anchoring beam is used to connect to the top plate of the box girder and through which the anchoring tie rod passes.

[0012] In conjunction with the first aspect, in one embodiment, the force transmission support rod is made of a rigid material.

[0013] Secondly, a method for relieving vibration control at the closure joint of a box girder is provided, which includes the following steps: Install the aforementioned box girder closure vibration control device onto the box girder; Release the box girder closure joint. Based on the vertical displacement direction of the box girder closure joint release surface, return the piston end of the first hydraulic jack or the second hydraulic jack to buffer the displacement of the box girder closure joint release surface.

[0014] In conjunction with the second aspect, in one implementation, if the release surface of the box girder closing joint is displaced upward in the vertical direction, the piston end of the second hydraulic jack is returned to oil. If the closing surface of the box girder displaces downward in the vertical direction, the piston end of the first hydraulic jack will return oil.

[0015] The beneficial effects of the technical solution provided in this application include: installing a cantilever beam above the box girder, with one end of the cantilever beam extending above the release surface of the box girder's closure joint to form a tension end; fixing a reaction support beam above the tension end of the cantilever beam via a force transmission support rod, and simultaneously connecting the force transmission support rod to the top plate of the box girder; installing a first hydraulic jack between the reaction support beam and the tension end of the cantilever beam, and having the piston end of the first hydraulic jack abut against the reaction support beam; and setting a second hydraulic jack at the release surface between the tension end of the cantilever beam and the box girder's closure joint, and having the piston end of the second hydraulic jack abut against the bottom surface of the cantilever beam. After releasing the box girder top plate closure joint, return the first hydraulic jack to its preset stroke and observe the contact between the second hydraulic jack and the bottom surface of the cantilever beam. If the piston end of the second hydraulic jack separates from the bottom surface of the cantilever beam, the closure joint release surface of the box girder will displace downwards relative to the box girder top plate. At this time, the closure joint release surface of the box girder will drive the reaction support beam to move towards the cantilever beam through the force transmission support rod. Then, return the first hydraulic jack in stages, so that the hydraulic pressure of the first hydraulic jack can buffer the displacement of the closure joint release surface of the box girder. If the first hydraulic jack releases the second hydraulic jack to its preset stroke, observe the contact between the second hydraulic jack and the bottom surface of the cantilever beam. As the piston end of the second hydraulic jack remains pressed against the bottom surface of the cantilever beam, the release surface of the box girder closure joint moves upward relative to the top plate of the box girder. At this time, the release surface of the box girder closure joint moves the reaction support beam away from the cantilever beam through the force transmission support rod. Then, the second hydraulic jack returns oil in stages, so that the hydraulic pressure of the second hydraulic jack buffers the displacement of the release surface of the box girder closure joint, allowing the release surface of the box girder closure joint to move slowly, reducing the possibility that the release surface of the box girder closure joint will move too fast after the closure joint is released and thus break.

[0016] This application provides a vibration control device for the box girder closure joint. Because it can buffer the displacement of the closure joint release surface when the box girder top plate contacts the closure joint, it solves the problem in related technologies where the closure joint release surface of the box girder is prone to breakage with the box girder top plate when the closure joint is released, which can lead to construction safety accidents. 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 A schematic diagram of the structure of a box girder closure joint vibration control device provided in this application embodiment when the box girder closure joint release surface is displaced upward when it is located at the box girder closure joint. Figure 2A schematic diagram of the structure of a box girder closure joint vibration control device provided in this application when the box girder closure joint release surface is displaced downward when the device is located at the box girder closure joint. In the diagram: 1. Cantilever beam; 11. Anchor support; 12. Anchor tie rod; 13. Second anchor pad beam; 2. Reaction support beam; 3. Force transmission support rod; 31. Anchor bolt; 311. Adjusting nut; 32. First anchor pad beam; 4. First hydraulic jack; 5. Second hydraulic jack; 6. Box girder top plate; 61. Box girder closure surface. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] This application provides a vibration control device for the closure joint of a box girder, which can solve the problem in related technologies where the cut of the continuous beam is prone to breakage when the closure joint is closed, thus causing construction safety accidents.

[0021] During the construction of the box girder, the box girder has a closure joint. The two sides of the closure joint are the box girder release surface and the two sides of the box girder top plate 6. After the box girder construction is completed, the closure joint needs to be released, that is, the box girder release surface needs to be separated from the box girder top plate 6. For ease of understanding, this application embodiment is described with a box girder closure joint release vibration control device already installed at the box girder closure joint, referring to... Figure 1 and Figure 2 This application provides a box girder closure joint vibration control device, which includes a cantilever beam 1, a reaction support beam 2, a force transmission support rod 3, a first hydraulic jack 4, and a second hydraulic jack 5. The cantilever beam 1 is connected to the top plate 6 of the box girder, and one end of the cantilever beam 1 extends to the top of the box girder closure joint release surface 61 to form a tension end. The reaction support beam 2 is located above the tension end of the cantilever beam 1. The force transmission support rod 3 passes through the reaction support beam 2 and the tension end of the cantilever beam 1 in a vertical direction and is connected to the top plate 6 of the box girder. The first hydraulic jack 4 is set on the tension end of the cantilever beam 1, and its piston end can extend toward the reaction support beam 2 until it abuts against the reaction support beam 2. The second hydraulic jack 5 is set on the box girder closure joint release surface 61, and its piston end can extend toward the cantilever beam 1 until it abuts against the cantilever beam 1.

[0022] Before dismantling the box girder closure joint, the aforementioned box girder closure joint vibration control device is installed at the box girder closure joint. The fixed end of the first hydraulic jack 4 is fixed to the tensioning end of the cantilever beam 1 with bolts, and its piston end is pressed against the ground of the reaction support beam 2. The fixed end of the second hydraulic jack 5 is fixed to the box girder closure joint release surface 61 with bolts, and its piston end is pressed against the bottom surface of the cantilever beam 1. When releasing the box girder closure joint, the piston end of the first hydraulic jack 4 is allowed to return oil to its preset stroke. At this time, the contact between the piston end of the second hydraulic jack 5 and the bottom surface of the cantilever beam 1 is observed. If the piston end of the second hydraulic jack 5 continues to contact the bottom surface of the cantilever beam 1, it indicates that the box girder closure joint release surface 61 is gradually displaced upwards relative to the top plate 6 of the box girder. This displacement is then driven by the force transmission support rod 3 to move the reaction support beam 2 away from the cantilever beam 1. The piston end of the second hydraulic jack 5 is then gradually returned oil until the oil pressure drops to zero at a uniform rate. During this gradual return process, the hydraulic pressure of the second hydraulic jack 5's own hydraulic return oil can buffer the upward displacement of the box girder closure joint release surface 61 relative to the cantilever beam 1, causing the box girder closure joint release surface 61 to gradually separate from the top plate 6 of the box girder, thus lowering the box girder... The possibility of sudden separation and violent movement of the closing joint release surface 61 is addressed. If the piston end of the first hydraulic jack 4 is allowed to return oil to its preset stroke, and the piston end of the second hydraulic jack 5 is observed to separate from the bottom surface of the cantilever beam 1, it indicates that the closing joint release surface 61 of the box girder is gradually displaced downward relative to the top plate 6 of the box girder. At this time, the piston end of the first hydraulic jack 4 is returned oil in stages until its oil pressure is zero. During the gradual return of oil by the piston end of the first hydraulic jack 4, the hydraulic pressure of its own hydraulic return oil can cause the closing joint release surface 61 of the box girder to move gradually towards the cantilever beam 1 through the force transmission support rod 3, thereby achieving displacement buffering of the closing joint release surface 61 of the box girder. This solves the problem in related technologies where the continuous beam cut is prone to breakage when the closing joint is released, which may lead to construction safety accidents.

[0023] In this embodiment, both the first hydraulic jack 4 and the second hydraulic jack 5 are hydraulic jacks with a self-locking function. This ensures that after the first hydraulic jack 4 is installed on the tensioning end of the cantilever beam 1 and its piston end abuts against the bottom surface of the reaction support beam 2, the self-locking function keeps the piston end of the first hydraulic jack 4 continuously in contact with the bottom surface of the reaction support beam 2. Similarly, after the second hydraulic jack 5 is installed on the closing surface 61 of the box girder and its piston end abuts against the bottom surface of the cantilever beam 1, the self-locking function keeps the piston end of the second hydraulic jack 5 continuously in contact with the bottom surface of the reaction cantilever beam 1.

[0024] More specifically, in one embodiment of this application, to facilitate the connection between the force transmission support rod 3 and the cantilever beam 1 and the reaction support beam 2, an anchor bolt 31 is provided at one end of the force transmission support rod 3 protruding from the reaction support beam 2, and an anchor bolt 31 is also provided at the other end of the force transmission support rod 3 protruding from the top surface of the cantilever beam 1. An adjusting nut 311 is connected to each anchor bolt 31 to lock the connection between the force transmission support rod 3 and the cantilever beam 1 and the reaction support beam 2. When releasing the box girder at the closing joint, loosening the adjusting nut 311 located on the top surface of the cantilever beam 1 allows the force transmission support rod 3 to move vertically relative to the cantilever beam 1 along with the displacement of the closing joint release surface 61 of the lower box girder. This achieves support and fixation of the reaction support beam 2 without affecting the synchronous displacement of the force transmission support rod 3 with the closing joint release surface 61 of the box girder. In one embodiment of this application, multiple force transmission support rods 3 are provided, and each force transmission support rod 3 is provided with an anchor bolt 31 and an adjusting nut 311 at one end that extends from the top surface of the cantilever beam 1 and the top surface of the reaction support beam 2.

[0025] To ensure a more stable connection between the force-transmitting support rod 3 and the box girder closure surface 61, a first anchoring beam 32 is fixed to the box girder closure surface 61 by anchor bolts. This provides an anchoring position for the force-transmitting support rod 3 on the box girder closure surface 61, allowing for a detachable connection between the force-transmitting support rod 3 and the box girder closure surface 61. In other embodiments, welding or concrete pouring can also be used to achieve the connection and fixation between the force-transmitting support rod 3 and the box girder closure surface 61. The specific connection method can be flexibly changed according to the actual working conditions.

[0026] Furthermore, to further enhance the stability of the force transmission support rod 3, it is specifically made of a rigid material. In this embodiment, the force transmission support rod 3 specifically uses precision-rolled threaded steel to improve its own strength and reduce the possibility of breakage during stress. Moreover, based on the diverse needs of actual engineering applications, the material selection for the force transmission support rod 3 can be expanded to include high-strength alloy steel, stainless steel, and carbon fiber composite materials, among other high-performance options, to achieve more comprehensive performance optimization. High-strength alloy steel, with its superior comprehensive mechanical properties, exhibits excellent tensile strength and good toughness, effectively resisting deformation and fatigue damage under dynamic loads, ensuring the long-term structural reliability of the force transmission support rod 3 in complex stress environments. Stainless steel provides excellent corrosion resistance, making it particularly suitable for humid or high-humidity environments, significantly enhancing the environmental adaptability and service life of the force transmission support rod 3 and reducing strength loss due to corrosion. Carbon fiber composite materials combine the outstanding advantages of lightweight and high specific strength, significantly reducing the self-weight of the force transmission support rod 3 while maintaining excellent impact resistance and fatigue resistance. This optimizes the overall force transmission efficiency while ensuring the strength of the force transmission support rod 3, further improving its reliability and durability. Through the flexible selection of these materials, the force transmission support rod 3 can achieve a more balanced stability improvement under different working conditions, fully meeting the high standards required for diverse engineering applications.

[0027] In one embodiment of this application, the cantilever beam 1 is connected to the top plate 6 of the box girder via an anchoring assembly. Specifically, the anchoring assembly is located at the end of the cantilever beam 1 furthest from the tension end along its length, allowing the cantilever beam 1 to be fixed above the box girder. More specifically, the anchoring assembly includes an anchor support 11 and an anchor tie rod 12. The anchor support 11 is located between the cantilever beam 1 and the top plate 6 of the box girder, and its two ends in the height direction are welded to the cantilever beam 1 and the top plate 6 of the box girder, respectively, or connected by concrete pouring, to support the cantilever beam 1 vertically.

[0028] Furthermore, to facilitate the removal of the cantilever beam 1 after bridge construction is completed, the anchoring assembly also includes an anchoring rod 12. The anchoring rod 12 passes through the cantilever beam 1 and the anchoring support 11 in a vertical direction and then into the top plate 6 of the box girder. In this embodiment, the two ends of the anchoring support 11 in the height direction abut against the bottom surface of the cantilever beam 1 and the top plate 6 of the box girder, respectively. The anchoring rod 12 extends out from the top surface of the cantilever beam 1, and a fixed anchor bolt is anchored at the connection point where the anchoring rod 12 extends out from the cantilever beam 1, so as to temporarily anchor the cantilever beam 1, the anchoring support 11, and the top plate 6 of the box girder into one unit through the anchoring rod 12.

[0029] In addition, to facilitate the anchoring connection between the anchoring tie rod 12 and the top plate 6 of the box girder, the anchoring assembly also includes a second anchoring pad beam 13, which is fixed to the top plate 6 of the box girder by several anchor bolts, so as to provide an anchoring position for the anchoring tie rod 12 on the top plate 6 of the box girder, making the connection between the anchoring tie rod 12 and the top plate 6 of the box girder more stable.

[0030] Based on the box girder closure joint vibration control device provided in this application, this application also proposes a box girder closure joint vibration control method, which includes the following steps: S1: Install the above-mentioned box girder closure vibration control device onto the box girder.

[0031] S2: Release the box girder closure joint. Based on the vertical displacement direction of the box girder closure joint release surface 61, return the piston end of the first hydraulic jack 4 or the second hydraulic jack 5 to buffer the displacement of the box girder closure joint release surface 61.

[0032] Specifically, when releasing the box girder closure joint, the piston end of the first hydraulic jack 4 is allowed to return oil to a preset stroke. At this time, the contact between the piston end of the second hydraulic jack 5 and the bottom surface of the cantilever beam 1 is observed, thereby determining the vertical displacement direction of the box girder closure joint release surface 61.

[0033] S201: If the box girder closing surface 61 is displaced upward in the vertical direction, then the piston end of the second hydraulic jack 5 will return oil.

[0034] If the piston end of the first hydraulic jack 4 returns oil to its preset stroke, and the piston end of the second hydraulic jack 5 continues to abut against the bottom surface of the cantilever beam 1, it indicates that the box girder closing joint release surface 61 is gradually displaced upwards in the vertical direction relative to the box girder top plate 6. At this time, the piston end of the second hydraulic jack 5 returns oil in stages until the oil pressure drops to zero at a uniform speed. During the gradual return of oil, the hydraulic pressure of the piston end of the second hydraulic jack 5 can buffer the upward displacement of the box girder closing joint release surface 61 relative to the cantilever beam 1, so that the box girder closing joint release surface 61 gradually separates from the box girder top plate 6, reducing the possibility of sudden separation and violent movement of the box girder closing joint release surface 61.

[0035] S202: If the box girder closing surface 61 is displaced downward in the vertical direction, then the piston end of the first hydraulic jack 4 will return oil.

[0036] If the piston end of the first hydraulic jack 4 returns oil to the preset stroke, and the piston end of the second hydraulic jack 5 separates from the bottom surface of the cantilever beam 1, it indicates that the box girder closing joint release surface 61 gradually moves downward relative to the top plate 6 of the box girder. At this time, the piston end of the first hydraulic jack 4 returns oil in stages until its oil pressure is zero. During the gradual return of oil, the hydraulic pressure of the piston end of the first hydraulic jack 4 can cause the box girder closing joint release surface 61 to move gradually towards the cantilever beam 1 through the force transmission support rod 3, thereby achieving displacement buffering of the box girder closing joint release surface 61.

[0037] 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.

[0038] 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.

[0039] 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 vibration control device for the closing joint of a box girder, characterized in that, It includes: A cantilever beam (1) is used to connect with the top plate (6) of the box girder, and one end of the cantilever beam extends to the top of the box girder closing face (61) to form a tension end; A reaction support beam (2) is provided above the tensioning end of the cantilever beam (1); The force transmission support rod (3) passes through the reaction support beam (2) and the tension end of the cantilever beam (1) in the vertical direction and is used to connect with the top plate (6) of the box girder; The first hydraulic jack (4) has its fixed end set on the tensioning end of the cantilever beam (1), and its piston end can extend toward the reaction support beam (2) until it abuts against the reaction support beam (2). In addition, a second hydraulic jack (5) has a fixed end for connecting with the box girder closing surface (61), and its piston end can extend toward the cantilever beam (1) until it presses against the cantilever beam (1).

2. The vibration control device for the closing joint of a box girder as described in claim 1, characterized in that, It also includes: Anchor bolts (31) are provided on the force transmission support rod (3), and bolt holes for connecting with the anchor bolts (31) are provided on the reaction support beam (2) and the cantilever beam (1); In addition, a setter nut (311) is connected to the anchor bolt (31).

3. The vibration control device for the closing joint of a box girder as described in claim 1, characterized in that, It also includes: The first anchoring beam (32) is used to connect with the box girder closing surface (61) and through which the force transmission support rod (3) passes.

4. The vibration control device for the closing joint of a box girder as described in claim 1, characterized in that, Also includes: An anchoring assembly is provided at one end of the cantilever beam (1) away from the tension end along its length, and at least one such anchoring assembly is provided for connection to the top plate (6) of the box girder.

5. The vibration control device for the closing joint of a box girder as described in claim 4, characterized in that, The anchoring assembly includes: An anchor support (11) is located between the cantilever beam (1) and the top plate of the box girder (6), and its two ends in the height direction are connected to the cantilever beam (1) and the top plate of the box girder (6) respectively.

6. The vibration control device for the closing joint of a box girder as described in claim 5, characterized in that, The anchoring assembly also includes: Anchoring tie rod (12) passes through the cantilever beam (1) and the anchoring support (11) in the vertical direction and is used to penetrate the top plate (6) of the box girder.

7. The vibration control device for the closing joint of a box girder as described in claim 4, characterized in that, The anchoring assembly includes: The second anchoring beam (13) is used to connect to the top plate (6) of the box girder and through which the anchoring tie rod (12) passes.

8. The vibration control device for the box girder closure joint as described in claim 1, characterized in that: The force transmission support rod (3) is made of rigid material.

9. A method for relieving vibration control at the closure joint of a box girder, characterized in that, It includes the following steps: Install the box girder closure vibration control device as described in any one of claims 1-8 onto the box girder; Release the box girder closure joint, and based on the vertical displacement direction of the box girder closure joint release surface (61), return the piston end of the first hydraulic jack (4) or the second hydraulic jack (5) to buffer the displacement of the box girder closure joint release surface (61).

10. The method for releasing vibration control at the closure joint of a box girder as described in claim 9, characterized in that: If the box girder closing surface (61) is displaced upward in the vertical direction, the piston end of the second hydraulic jack (5) will return oil. If the box girder closing surface (61) is displaced downward in the vertical direction, the piston end of the first hydraulic jack (4) will return oil.

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