A rotating-adapted sling anchoring configuration and a method for determining parameters thereof

Abstract

The present application relates to the technical field of bridge engineering, and in particular to a kind of sling anchoring structure adapting rotation and parameter determination method thereof, the parameter determination method includes the following steps: obtaining the maximum construction angle of sling at the end of main girder in each construction stage;The design parameters of sling anchoring structure are preset, and based on the design parameters, the design maximum angle of space restriction of anchor cup is obtained;If the maximum construction angle is greater than the design maximum angle, then the design parameters of sling anchoring structure are adjusted again until the maximum construction angle is less than or equal to the design maximum angle.The present application can solve the problem that the same specification is used in the prior art pressure type anchoring structure, whether it meets the engineering needs cannot be determined, when the adapted sling rotation does not meet the requirements, a large concentrated stress will be generated, affecting the safety of the structure.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, specifically to a rotation-adaptive cable anchorage structure and a method for determining its parameters. Background Technology

[0002] During the girder hoisting process of suspension bridges or cable-stayed bridges, the elevation of the erected girder segment is usually higher than the design position because the second phase of dead load construction has not been carried out. At this time, the angle between the suspenders and the main girder is inconsistent with that when the bridge is completed, that is, the suspenders rotate relative to the main girder.

[0003] When a pin-type connection is used between the sling and the main beam, the connection structure can accommodate the rotation of the sling. However, when a bearing-type anchor is used between the sling and the main beam, the amount of sling rotation that the connection structure can accommodate is usually very small.

[0004] Currently, there is no known calculation method for the cable rotation angle that can be accommodated by the pressure-bearing anchorage structure, nor is there a known calculation method for the rotation angle of the cable beam end anchorage position during construction. The anchorage structures all use the same specifications, and it is impossible to determine whether they meet the project requirements. When the accommodated cable rotation amount does not meet the requirements, it will generate large concentrated stress, affecting structural safety. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a rotation-adaptive sling anchorage structure and a method for determining its parameters. This addresses the problem that existing pressure-bearing anchorage structures, using the same specifications, cannot guarantee whether they meet engineering requirements. Furthermore, when the appropriate sling rotation amount is insufficient, significant concentrated stress can occur, affecting structural safety.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] On one hand, the present invention provides a method for designing the structural parameters of a sling anchorage structure that adapts to rotation, comprising the following steps:

[0008] Obtain the maximum rotation angle of the suspenders at the end of the main beam during each construction stage;

[0009] The design parameters of the sling anchorage structure are preset, and based on the design parameters, the maximum design rotation angle of the anchor cup under space constraints is obtained;

[0010] If the maximum rotation angle during construction is greater than the maximum rotation angle under design, the design parameters of the sling anchorage structure shall be readjusted until the maximum rotation angle during construction is less than or equal to the maximum rotation angle under design.

[0011] In some alternative solutions, obtaining the maximum rotation angle of the suspenders at the main beam end during each construction stage includes:

[0012] A finite element model of the cable-stayed beam was established to obtain the displacement of the cable ends at each construction stage;

[0013] According to the formula

[0014]

[0015] The maximum rotation angle Δθ during construction is determined by the following formula: x1 is the lateral coordinate of the cable beam end node in the cable-beam finite element model; y1 is the vertical coordinate of the cable beam end node in the cable-beam finite element model; x2 is the lateral coordinate of the cable cable end node in the cable-beam finite element model; y2 is the vertical coordinate of the cable cable end node in the cable-beam finite element model; Δx1 is the lateral displacement value of the cable beam end node in the cable-beam finite element model at the current construction stage; Δy1 is the vertical displacement value of the cable beam end node in the cable-beam finite element model at the current construction stage; Δx2 is the lateral displacement value of the cable cable end node in the cable-beam finite element model at the current construction stage; Δy2 is the vertical displacement value of the cable cable end node in the cable-beam finite element model at the current construction stage; and θ0 is the vertical rotation angle of the cable beam end node at the current construction stage.

[0016] In some alternative solutions, according to the formula The maximum design rotation angle θ1 of the anchor cup is determined by the space constraint of the spherical washer. d2 is the inner diameter of the spherical washer, d3 is the outer diameter of the anchor cup, and h1 is the distance between the center of the ball of the contact surface between the spherical nut and the spherical washer and the anchor plate.

[0017] In some alternative designs, the maximum design rotation angle of the anchor cup, which is limited by space, is the smaller of the maximum design rotation angle of the anchor cup limited by the space of the spherical washer and the maximum design rotation angle of the anchor cup limited by the space of the bearing plate.

[0018] In some alternative solutions, according to the formula Determine the maximum design rotation angle θ2 of the anchor cup due to the space constraint of the bearing plate, where d4 is the net distance between the two bearing plates and h2 is the distance from the end of the anchor cup extending out of the anchor plate to the side of the anchor plate near the spherical washer.

[0019] On the other hand, the present invention provides a rotation-adaptive sling anchorage structure, designed using the rotation-adaptive sling anchorage structure parameter design method described in any of the above claims, including:

[0020] An anchor plate, which is used to fix it to the anchor box, is provided with a first through hole;

[0021] A spherical washer is disposed on one side of the anchor plate and fixed relative to the anchor plate. The spherical washer has a second through hole corresponding to the first through hole and a concave spherical surface on the side away from the anchor plate.

[0022] A spherical nut having a convex spherical surface that matches the concave spherical surface, and a connecting hole in the middle of the spherical nut;

[0023] An anchor cup, which passes through the connecting hole and the first through hole and is connected to the ball nut, is used to connect the sling.

[0024] In some alternative embodiments, the rotatable sling anchorage structure further includes two bearing plates connected to the anchor plate and located on the opposite side of the spherical washer, with the first through hole located between the two bearing plates.

[0025] In some alternative configurations, the rotatable sling anchorage also includes a limiting stop surrounding the outside of the spherical washer and connected to the anchor plate.

[0026] In some alternative designs, the first through hole is frustum-shaped, with its smaller diameter end near the spherical washer and having the same diameter as the second through hole.

[0027] In some alternative designs, the inclined surface of the first through hole is at a 45° angle to the axis.

[0028] Compared with existing technologies, the advantages of this invention are as follows: It obtains the maximum rotation angle of the suspender cable at the main beam end during each construction stage; and based on the preset design parameters of the suspender cable anchorage structure, it obtains the maximum design rotation angle of the anchor cup due to spatial constraints. Then, it determines the relationship between the maximum construction rotation angle and the maximum design rotation angle. If the maximum construction rotation angle is greater than the maximum design rotation angle, the anchor cup will be restricted from further rotation and will be held against the spherical washer, resulting in significant concentrated stress and potentially causing safety hazards. Therefore, it is necessary to readjust the design parameters of the suspender cable anchorage structure until the maximum construction rotation angle is less than or equal to the maximum design rotation angle, so that the anchor cup is not spatially restricted by the spherical washer, thus avoiding concentrated stress against the spherical washer and improving construction safety. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the rotating sling anchorage structure in an embodiment of the present invention;

[0031] Figure 2 As described in the embodiments of the present invention Figure 1 A schematic diagram of section 1-1;

[0032] Figure 3 This is a front view schematic diagram of the anchor plate in an embodiment of the present invention;

[0033] Figure 4 This is a top view of the anchor plate in an embodiment of the present invention.

[0034] In the diagram: 1. Anchor plate; 11. First through hole; 2. Anchor box; 3. Spherical washer; 31. Second through hole; 4. Spherical nut; 5. Anchor cup; 6. Limiting block; 7. Lifting cable; 8. Pressure plate. Detailed Implementation

[0035] 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.

[0036] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figure 1 and Figure 2 As shown, on one hand, the present invention provides a method for designing the structural parameters of a sling anchorage structure that adapts to rotation, comprising the following steps:

[0038] S1: Obtain the maximum rotation angle of sling 7 at the end of the main beam during each construction stage.

[0039] The maximum rotation angle during construction is calculated based on the stress conditions of the actual working conditions, or it can be obtained through simulation using a finite element model of the cable-stayed beam.

[0040] In this example, the finite element model of the cable-stayed beam is used for simulation. Step S1 specifically includes:

[0041] A finite element model of the cable-stayed beam was established to obtain the displacement of the 7-end cable at each construction stage; according to the formula...

[0042]

[0043] The maximum rotation angle Δθ during construction is determined by the following formula: x1 is the lateral coordinate of the cable beam end node in the cable-beam finite element model; y1 is the vertical coordinate of the cable beam end node in the cable-beam finite element model; x2 is the lateral coordinate of the cable cable end node in the cable-beam finite element model; y2 is the vertical coordinate of the cable cable end node in the cable-beam finite element model; Δx1 is the lateral displacement value of the cable beam end node in the cable-beam finite element model at the current construction stage; Δy1 is the vertical displacement value of the cable beam end node in the cable-beam finite element model at the current construction stage; Δx2 is the lateral displacement value of the cable cable end node in the cable-beam finite element model at the current construction stage; Δy2 is the vertical displacement value of the cable cable end node in the cable-beam finite element model at the current construction stage; and θ0 is the vertical rotation angle of the cable beam end node at the current construction stage.

[0044] S2: Preset the design parameters of the sling anchorage structure, and based on the design parameters, obtain the maximum design rotation angle of the anchor cup 5 under space constraints.

[0045] In this example, the sling anchoring structure adapted to rotation includes: anchor plate 1, spherical washer 3, spherical nut 4, and anchor cup 5.

[0046] Anchor plate 1 is used to fix itself to anchor box 2. Anchor plate 1 has a first through hole 11. Spherical washer 3 is located on one side of anchor plate 1 and fixed relative to anchor plate 1. Spherical washer 3 has a second through hole 31 corresponding to the first through hole 11 and a concave spherical surface on the side away from anchor plate 1. Spherical nut 4 has a convex spherical surface that matches the concave spherical surface and a connecting hole in the middle of spherical nut 4. Anchor cup 5 passes through the connecting hole and the first through hole 11 and is connected to spherical nut 4 for connecting sling 7.

[0047] In this design, the spherical washer 3 is fixedly positioned relative to the anchor plate 1. After the sling 7 is connected to the anchor cup 5, the anchor cup 5 passes through the connecting hole and the first through hole 11 and is connected to the spherical nut 4. The sling 7 pulls the anchor cup 5 under force, causing the spherical nut 4 to press against the spherical washer 3, thereby pressing the spherical washer 3 against the anchor plate 1. In addition, the anchor cup 5 will rotate relative to the spherical washer 3 with the spherical nut 4, so the anchor cup 5 will be spatially restricted by the spherical washer 3.

[0048] Therefore, in this example, according to the formula The maximum rotation angle θ1 of the anchor cup 5 is determined by the space constraint of the spherical washer 3. d2 is the inner diameter of the spherical washer 3, d3 is the outer diameter of the anchor cup 5, and h1 is the distance between the center of the contact surface between the spherical nut 4 and the spherical washer 3 and the anchor plate 1.

[0049] To improve the load-bearing capacity of the anchor plate 1, the rotation-adaptive sling anchoring structure further includes two bearing plates 8. The bearing plates 8 are connected to the anchor plate 1 and located on the opposite side of the spherical washer 3. The first through hole 11 is located between the two bearing plates 8. The bearing plates 8 abut against the anchor plate 1 and are used to connect to the anchor box 2, providing support for the anchor plate 1 to improve its load-bearing capacity.

[0050] At this time, after the anchor cup 5 passes through the first through hole 11 set on the anchor plate 1, it is located between the two pressure plates 8. The anchor cup 5 is also restricted by the space of the two pressure plates 8.

[0051] Therefore, the maximum design rotation angle of anchor cup 5 due to space constraints is the smaller of the maximum design rotation angle of anchor cup 5 due to space constraints of spherical washer 3 and the maximum design rotation angle of anchor cup 5 due to space constraints of bearing plate 8.

[0052] According to the formula Determine the maximum design rotation angle θ2 of the anchor cup 5 under the spatial constraint of the bearing plate 8, where d4 is the net distance between the two bearing plates 8, and h2 is the distance from the end of the anchor cup 5 extending out of the anchor pad 1 to the side of the anchor pad 1 near the spherical washer 3.

[0053] In this example, the maximum design rotation angle θ2 of the anchor cup 5 under the spatial constraint of the bearing plate 8 was obtained. It was compared with the maximum design rotation angle θ1 of the anchor cup 5 under the spatial constraint of the spherical washer 3, and the smaller value of the two was taken as the maximum design rotation angle.

[0054] S3: If the maximum construction angle is greater than the maximum design angle, the design parameters of the sling anchorage structure shall be readjusted until the maximum construction angle is less than or equal to the maximum design angle.

[0055] In the design, if the maximum rotation angle during construction exceeds the maximum rotation angle under design, the anchor cup 5 will be restricted from further rotation and will be pressed against the bearing plate 8 or the spherical washer 3. This will generate significant concentrated stress and may pose a safety hazard. Therefore, it is necessary to readjust the design parameters of the sling anchoring structure until the maximum rotation angle during construction is less than or equal to the maximum rotation angle under design. This will prevent the anchor cup 5 from pressing against the bearing plate 8 or the spherical washer 3 due to rotation.

[0056] like Figure 1 and Figure 2 As shown, on the other hand, the present invention also provides a rotation-adaptive sling anchorage structure, the design parameters of which are designed using the rotation-adaptive sling anchorage structure parameter design method described in any of the above claims, including: anchor plate 1, spherical washer 3, spherical nut 4 and anchor cup 5.

[0057] Anchor plate 1 is used to fix it on anchor box 2. Anchor plate 1 is provided with a first through hole 11. Spherical washer 3 is provided on one side of anchor plate 1 and fixed relative to anchor plate 1. Spherical washer 3 is provided with a second through hole 31 corresponding to the first through hole 11, and a concave spherical surface is provided on the side away from anchor plate 1. Spherical nut 4 is provided with a convex spherical surface that matches the concave spherical surface. A connecting hole is provided in the middle of spherical nut 4. Anchor cup 5 passes through the connecting hole and the first through hole 11 and is connected to spherical nut 4 for connecting sling 7.

[0058] In this design, the spherical washer 3 and the anchor plate 1 are fixedly positioned relative to each other. After the sling 7 is connected to the anchor cup 5, the anchor cup 5 passes through the connecting hole and the first through hole 11 and is connected to the spherical nut 4. When the sling 7 is pulled, the anchor cup 5 will rotate relative to the spherical washer 3, causing the spherical nut 4 to rotate. Therefore, the anchor cup 5 will be spatially restricted by the spherical washer 3. By designing the parameters of this rotation-adaptive sling anchoring structure using the above parameter design method, when the sling 7 is pulled and the anchor cup 5 rotates relative to the spherical washer 3, the anchor cup 5 will not be spatially restricted by the spherical washer 3, i.e., it will not resist the spherical washer 3 and generate concentrated stress, thereby improving construction safety.

[0059] In this example, the inner wall of the connecting hole of the ball nut 4 is provided with an internal thread, and the outer wall of the anchor cup 5 is provided with an external thread. The anchor cup 5 and the ball nut 4 are connected through the internal thread provided on the inner wall of the connecting hole and the external thread provided on the outer wall of the anchor cup 5.

[0060] In some alternative embodiments, the sling anchoring structure further includes two pressure plates 8 connected to the anchor plate 1 and located on the opposite side of the spherical washer 3, with a first through hole 11 located between the two pressure plates 8.

[0061] In this embodiment, after the anchor cup 5 passes through the first through hole 11 provided on the anchor plate 1, it is located between the two bearing plates 8, and the anchor cup 5 is also constrained by the space of the two bearing plates 8. Therefore, the maximum design rotation angle of the anchor cup 5 due to space constraint is the smaller value between the maximum design rotation angle of the anchor cup 5 constrained by the space of the spherical washer 3 and the maximum design rotation angle of the anchor cup 5 constrained by the space of the bearing plate 8.

[0062] In some alternative embodiments, the sling anchoring structure further includes a limiting block 6, which surrounds the outside of the spherical washer 3 and is connected to the anchor plate 1.

[0063] In this embodiment, by surrounding the spherical washer 3 with a limiting block 6, the position of the spherical washer 3 relative to the anchor plate 1 is fixed. This prevents the spherical washer 3 from sliding relative to the anchor plate 1 when the sling 7 pulls the anchor cup 5, causing the spherical nut 4 to rotate relative to the spherical washer 3. This would prevent the anchor cup 5 from being located at the center of the first through hole 11, thus causing concentrated stress against the side wall of the first through hole 11. Of course, in other embodiments, the position of the spherical washer 3 relative to the anchor plate 1 can also be fixed in other ways, for example, by directly fixing the spherical washer 3 to the anchor plate 1.

[0064] like Figure 3 and Figure 4 As shown, in some optional embodiments, the first through hole 11 is frustum-shaped, and the small diameter end of the first through hole 11 is close to the side of the spherical washer 3 and has the same diameter as the second through hole 31.

[0065] In some alternative embodiments, the inclined surface of the first through hole 11 is at a 45° angle to the axis.

[0066] In this embodiment, by designing the first through hole 11 as a frustum shape, when the anchor cup 5 drives the spherical nut 4 to rotate relative to the spherical washer 3, the anchor cup 5 passes through the first through hole 11 and abuts against the inner wall of the first through hole 11 during rotation. At this time, since the smaller diameter end of the first through hole 11 is close to the side of the spherical washer 3 and has the same diameter as the second through hole 31, it is only necessary to consider whether the anchor cup 5 is restricted by the second through hole 31 on the spherical washer 3. In this example, the first through hole 11 is frustum shaped, and the side wall of the frustum-shaped first through hole 11, i.e., the inclined surface, is designed to be at 45° with its own axis, which can better prevent the anchor cup 5 from abutting against the side wall of the first through hole 11 when rotating relative to the spherical washer 3.

[0067] In summary, by obtaining the maximum rotation angle of the suspender 7 at the main beam end during each construction stage, and by pre-setting the design parameters of the suspender anchorage structure, the maximum design rotation angle of the anchor cup 5 under spatial constraints is obtained based on the design parameters. Then, the relationship between the maximum construction rotation angle and the maximum design rotation angle is determined. If the maximum construction rotation angle is greater than the maximum design rotation angle, the anchor cup 5 will be restricted from further rotation and will be held against the bearing plate 8 or the spherical washer 3. This will generate a large concentrated stress, which may cause safety hazards. Therefore, it is necessary to readjust the design parameters of the suspender anchorage structure until the maximum construction rotation angle is less than or equal to the maximum design rotation angle, so that the anchor cup 5 is not spatially restricted by the spherical washer 3 or the bearing plate 8, thus avoiding concentrated stress on the spherical washer 3 and improving construction safety.

[0068] 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.

[0069] 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.

[0070] 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 method for designing the structural parameters of a sling anchorage structure that adapts to rotation, characterized in that, The sling anchoring structure includes: An anchor plate (1) is used to fix it on the anchor box (2), and the anchor plate (1) is provided with a first through hole (11). A spherical washer (3) is provided on one side of the anchor plate (1) and fixed relative to the anchor plate (1). The spherical washer (3) is provided with a second through hole (31) corresponding to the first through hole (11) and a concave spherical surface is provided on the side away from the anchor plate (1). A spherical nut (4) is provided with a convex spherical surface that matches the concave spherical surface, and a connecting hole is provided in the middle of the spherical nut (4); An anchor cup (5) passes through the connecting hole and the first through hole (11) and is connected to the ball nut (4) for connecting the sling (7); Includes the following steps: Obtain the maximum rotation angle of the sling (7) at the end of the main beam during each construction stage, including: Establish a finite element model of the cable beam and obtain the displacement of the end of the cable (7) in each construction stage; According to the formula Determine the maximum turning angle during construction. In the formula, x1 is the lateral coordinate of the cable beam end node in the cable beam finite element model; y1 is the vertical coordinate of the cable beam end node in the cable beam finite element model; x2 is the lateral coordinate of the cable cable end node in the cable beam finite element model; y2 is the vertical coordinate of the cable cable end node in the cable beam finite element model; Δx1 is the lateral displacement value of the cable beam end node in the cable beam finite element model at the current construction stage; Δy1 is the vertical displacement value of the cable beam end node in the cable beam finite element model at the current construction stage; Δx2 is the lateral displacement value of the cable cable end node in the cable beam finite element model at the current construction stage; Δy2 is the vertical displacement value of the cable cable end node in the cable beam finite element model at the current construction stage. This refers to the vertical rotation angle of the cable-stayed beam end node during the current construction phase. The design parameters of the sling anchorage structure are preset, and based on the design parameters, the maximum design rotation angle of the anchor cup (5) under space constraints is obtained; If the maximum rotation angle during construction is greater than the maximum rotation angle under design, the design parameters of the sling anchorage structure shall be readjusted until the maximum rotation angle during construction is less than or equal to the maximum rotation angle under design.

2. The method for designing rotation-adaptive cable anchorage structure parameters as described in claim 1, characterized in that, According to the formula Determine the maximum rotation angle of the anchor cup (5) under the spatial constraints of the spherical washer (3). d2 is the inner diameter of the spherical washer (3), d3 is the outer diameter of the anchor cup (5), and h1 is the distance between the center of the contact surface between the spherical nut (4) and the spherical washer (3) and the anchor plate (1).

3. The method for designing rotation-adaptive cable anchorage structure parameters as described in claim 2, characterized in that, The sling anchoring structure also includes two pressure plates (8), which are connected to the anchor plate (1) and located on the opposite side of the spherical washer (3). The first through hole (11) is located between the two pressure plates (8). The maximum design rotation angle of the anchor cup (5) under space constraints is the smaller of the maximum design rotation angle of the anchor cup (5) under space constraints of the spherical washer (3) and the maximum design rotation angle of the anchor cup (5) under space constraints of the bearing plate (8).

4. The method for designing rotation-adaptive cable anchorage structure parameters as described in claim 3, characterized in that, According to the formula Determine the maximum design rotation angle of the anchor cup (5) constrained by the space of the bearing plate (8). , where d4 is the net distance between the two bearing plates (8) and h2 is the distance from the end of the anchor cup (5) extending out of the anchor plate (1) to the side of the anchor plate (1) near the spherical washer (3).

5. A sling anchoring structure adaptable to rotation, characterized in that, The method for designing rotation-adaptive sling anchorage structure parameters as described in any one of claims 1-4 includes: An anchor plate (1) is used to fix it on the anchor box (2), and the anchor plate (1) is provided with a first through hole (11). A spherical washer (3) is provided on one side of the anchor plate (1) and fixed relative to the anchor plate (1). The spherical washer (3) is provided with a second through hole (31) corresponding to the first through hole (11) and a concave spherical surface is provided on the side away from the anchor plate (1). A spherical nut (4) is provided with a convex spherical surface that matches the concave spherical surface, and a connecting hole is provided in the middle of the spherical nut (4); An anchor cup (5) passes through the connecting hole and the first through hole (11) and is connected to the ball nut (4) for connecting the sling (7).

6. The rotation-adaptive sling anchorage structure as described in claim 5, characterized in that, It also includes two pressure plates (8), which are connected to the anchor plate (1) and located on the opposite side of the spherical washer (3), and the first through hole (11) is located between the two pressure plates (8).

7. The rotation-adaptive sling anchoring structure as described in claim 5, characterized in that, It also includes a limiting block (6), which surrounds the outside of the spherical washer (3) and is connected to the anchor plate (1).

8. The rotation-adaptive sling anchorage structure as described in claim 5, characterized in that, The first through hole (11) is frustum shaped. The small diameter end of the first through hole (11) is close to the spherical washer (3) and has the same diameter as the second through hole (31).

9. The rotation-adaptive sling anchorage structure as described in claim 8, characterized in that, The inclined surface of the first through hole (11) is at 45° to the axis.

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