Combined anchor box for negative-angle vertical rotation of bridge arch rib

Abstract

The utility model discloses a combined type anchor box for negative angle vertical rotation of a bridge arch rib, which comprises a longitudinal beam box, at least two first web plates and first flange plates, the first web plates are arranged in parallel, and the top surfaces and the bottom surfaces of the two first web plates are respectively connected through the first flange plates; the transverse beam box is connected to the top faces of the at least two longitudinal beam boxes and comprises at least two second webs, second flange plates and a stress lug plate combination, the second webs are arranged in parallel, the top faces and the bottom faces of the two second webs are connected through the second flange plates respectively, the stress lug plate combination comprises at least two lug plates arranged at intervals, and the stress lug plate combination is arranged between the two lug plates. The lug plates penetrate through the second web plate in a crossed mode in the width direction and are connected with the second web plate at the crossed position. The combined anchor box is arranged at the top of the tower, so that the strength and the rigidity of the tower are improved, and the probability that the tower is damaged, deviated or inclined in the arch rib rotating process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a combined anchor box for negative angle vertical rotation of bridge arch ribs. Background Technology

[0002] Steel-concrete composite arch bridges are a type of steel-concrete composite structure. Concrete is filled inside steel tubes, and the radial constraint of the steel tubes restricts the expansion of the concrete under compression, placing it in a triaxial compression state, thus significantly improving its compressive strength. Because the steel tubes serve as a rigid load-bearing skeleton, welding during construction is relatively simple, the lifting weight is light, and the bridges have aesthetically pleasing designs, making them widely used in modern bridge construction. The steel tube arch rib structure in arch bridges can be constructed using various methods, including full-span scaffolding, scaffold-free lifting, low-position assembly and overall lifting, and rotation construction. The rotation construction method involves dividing the arch ring or the entire superstructure into two half-spans (which can be of different lengths). These half-arches are prefabricated and assembled on both banks of the river using the terrain or simple supports. Then, a power device is used to rotate the half-arches to the bridge axis position or design elevation to form the full arch. The rotation construction method has advantages such as requiring less large equipment, less construction materials, and less interference with traffic below the bridge, thus its application in bridge construction is increasing.

[0003] Currently, the vertical rotation construction of steel pipe arch bridges mostly adopts the horizontal splicing and upward lifting method. During assembly, a horizontal splicing support is first erected at a low position along the direction of the arch rib extension. After the support is erected, a tower is used to fix the tensioning jacks or winches. The arch ribs are then rotated from bottom to top to the bridge axis position or design elevation to form an arch by using the tensioning jacks or winches. When using tension jacks to secure towers, anchor boxes are typically required. Currently, most tower anchor boxes adopt a longitudinal bridge-oriented structure. For example, utility model patent CN208669524U discloses a self-balancing control system for arch bridge towers. In this system, jacks connect the arch ring and anchor cables via ties and anchor cables. The anchor cables are located at the rear of the tower to anchor it, while the ties are used for vertical rotation of the arch ribs. The anchor boxes used to secure the jacks connecting the ties and anchor cables are positioned longitudinally, located at the front and rear of the tower. Alternatively, the cables at the top of the tower often use a single-cable structure, where a saddle is installed at the top of the tower for multiple cable strands to support sliding. However, during vertical rotation, the inconsistent angles between the ties and anchor cables can generate significant horizontal forces, leading to uneven stress on the tower and potentially causing displacement or tilting. Therefore, it is necessary to design an anchor box that can increase the strength and stiffness of the tower, reducing the probability of damage, displacement, or tilting. Utility Model Content

[0004] This utility model discloses a combined anchor box for vertical rotation of bridge arch ribs at negative angles, which increases the strength and rigidity of the tower and reduces the probability of damage, displacement or tilting of the tower during the rotation of the arch rib.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A combined anchor box for negative angle vertical rotation of bridge arch ribs includes:

[0007] The longitudinal beam box has at least two parts, including a first web and a first flange. At least two first webs are arranged in parallel. The top and bottom surfaces of the two first webs are connected by the first flanges, and the first flanges extend beyond the outer surfaces of the two first webs in the width direction.

[0008] A crossbeam box, connected to the top surface of at least two longitudinal beam boxes, includes a combination of a second web plate, a second flange plate, and a load-bearing lug plate. At least two second web plates are arranged in parallel. The top and bottom surfaces of the two second web plates are connected by the second flange plate, and the second flange plate extends beyond the outer surfaces of the two second web plates in the width direction. The load-bearing lug plate combination includes at least two lug plates arranged at intervals. The lug plates cross through the second web plate in the width direction and are connected to the second web plate at the intersection. The portions in front of and behind the second web plate are provided with corresponding ear holes.

[0009] Preferably, the longitudinal beam box further includes a first reinforcing plate, which is in the shape of a right-angled trapezoid, with the right-angled side having the same height as the first web plate, the top edge being attached to or connected to the first flange plate located above, the bottom edge being attached to or connected to the first flange plate located below, and extending beyond the first flange plate.

[0010] Preferably, the longitudinal beam box further includes a first stiffening plate, which is spaced apart between the first web plates.

[0011] Preferably, the crossbeam box further includes a second reinforcing plate, which is in the shape of a right-angled trapezoid, with the right-angled side at the same height as the second web plate, the top edge attached to or connected to the upper second flange plate, the bottom edge attached to or connected to the lower second flange plate, and extends beyond the second flange plate.

[0012] Preferably, the crossbeam box further includes a second stiffening plate, which is spaced apart between the second web plates.

[0013] Preferably, the second web plate is completely broken at the position where it intersects with the ear plate, and the top and bottom surfaces of the ear plate are flush with the top and bottom surfaces of the second web plate, respectively.

[0014] Preferably, the portion of the first reinforcing plate extending beyond the first flange plate located below it has its bottom surface flush with the bottom surface of the first flange plate.

[0015] Preferably, the portion of the second reinforcing plate extending beyond the second flange plate located below it has its bottom surface flush with the bottom surface of the second flange plate.

[0016] Preferably, the portion of the ear plate extending beyond the second abdominal plate is provided with an ear hole, and an annular ear plate reinforcing plate is provided around the ear hole, the ear plate reinforcing plate being fixedly connected to the ear plate.

[0017] Preferably, the second reinforcing plate is arranged at intervals on the outside of the force-bearing lug assembly.

[0018] The above-mentioned combined anchor box has ear holes in the front and rear parts of the second web plate. The ear holes are used to connect with the jacks of the tensioning cables and the anchoring ends of the fixing cables. It can be installed on the top of the tower for the rotation construction of the arch rib.

[0019] This utility model has the following advantages:

[0020] (1) The arrangement of longitudinal and transverse beams can increase the strength and rigidity of the top of the tower, so that the force of the cable is evenly transmitted to the tower and then to the foundation, which helps to improve the safety of the arch rib rotation construction.

[0021] (2) This embodiment uses a continuous load-bearing ear plate, which can reduce the problem of tearing of the cable connection structure caused by uneven horizontal force due to uneven horizontal force in the combined anchor box.

[0022] (3) This utility model further adopts a variety of reinforcing structures such as reinforcing plates, stiffening plates, and ear plates, which can further reduce the problem of tearing of the cable connection structure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main perspective structure of the crossbeam box.

[0024] Figure 2 yes Figure 1 A top-down perspective structural diagram.

[0025] Figure 3 yes Figure 2 A schematic diagram of the AA section structure.

[0026] Figure 4 yes Figure 2 A schematic diagram of the BB cross-section structure.

[0027] Figure 5 This is a structural diagram of the ear plate and the ear plate reinforcement plate.

[0028] Figure 6 This is a front perspective structural diagram of the longitudinal beam box.

[0029] Figure 7yes Figure 6 A top-down perspective structural diagram.

[0030] Figure 8 yes Figure 6 A schematic diagram of the left-side view structure.

[0031] Figure 9 This is a schematic diagram of the combined anchor box of this utility model applied in the negative angle vertical rotation of the arch rib.

[0032] Figure 10 yes Figure 9 A magnified structural diagram of section C.

[0033] Second flange plate 1, second web plate 2, ear plate 3, ear plate reinforcing plate 4, second reinforcing plate 5, second stiffening plate 6, ear hole 7, first flange plate 8, first web plate 9, first stiffening plate 10, first reinforcing plate 11, tension jack 12, lowering cable 13, tower 14, anchor cable 15, anchor cable anchoring end 16, arch rib segment 17, rear anchor device 18, wind cable 20. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0035] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify 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. Therefore, they should not be construed as limitations on this utility model.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] A combined anchor box for negative angle vertical rotation of bridge arch ribs includes a longitudinal beam box and a transverse beam box, wherein:

[0038] At least two longitudinal box girders are provided, which are installed along the longitudinal direction of the bridge, in conjunction with... Figures 6-8 As shown, each longitudinal beam box includes a first web plate 9 and a first flange plate 8. At least two first web plates 9 are arranged in parallel, and their top and bottom surfaces are connected by the first flange plate 8. The first flange plate 8 extends beyond the outer surfaces of the two first web plates 9 in the width direction. A transverse beam box is connected to the top surface of at least two longitudinal beam boxes, as shown... Figures 1-5 As shown, the assembly includes a second web plate 2, a second flange plate 1, and a load-bearing lug plate assembly. At least two second web plates 2 are arranged in parallel, with their top and bottom surfaces connected by the second flange plates 1. The second flange plates 1 extend beyond the outer surfaces of the two second web plates 2 in the width direction. The load-bearing lug plate assembly includes at least two spaced lug plates 3. The lug plates 3 cross through the second web plates 2 in the width direction and connect to the second web plates 2 at the intersection. Lug holes 7 are correspondingly provided in the portions in front of and behind the second web plates 2. The connection between the crossbeam box and the longitudinal beam box is achieved by connecting the second flange plate 1 (located below the crossbeam box) and the first flange plate 8 (located above the longitudinal beam box). In this embodiment, the crossbeam box is arranged along the transverse direction of the bridge. Ear holes 7 are provided on the ear plates 3 of the crossbeam box in front of and behind the second web plate 2. The ear holes 7 in the front and rear are respectively connected to the jacks of the tension cables or the anchoring ends of the fixed cables in front of and behind the second web plate 2, so that the front and rear cables apply force on the same ear plate 3. This can reduce the problem of cable connection structure tearing caused by uneven horizontal force in the combined anchor box. In addition, the entire combined anchor box reinforcement structure with the longitudinal beam box fixing the crossbeam box can reduce the probability of deformation. This allows the load of the jacks to be transferred to the tower more evenly, reducing the probability of the tower shifting or tilting during the rotation of the arch rib.

[0039] Preferably, to further enhance the strength and rigidity of the longitudinal beam box, the longitudinal beam box also includes a first reinforcing plate 11. The first reinforcing plate 11 is generally in the shape of a right-angled trapezoid, with the right-angled side at the same height as the first web plate 9. The top edge is attached to or connected to the upper first flange plate 8, and the bottom edge is attached to or connected to the lower first flange plate 8, extending beyond the first flange plate 8. The provision of the first reinforcing plate 11 increases vertical support and improves the stability of the connection between the first flange plate 8 and the first web plate 9, thereby enhancing the strength and rigidity of the longitudinal beam box to a certain extent. More preferably, the portion of the first reinforcing plate 11 extending beyond the lower first flange plate 8 has a bottom surface flush with the bottom surface of the first flange plate 8. That is, the portion of the first reinforcing plate 11 near the first web plate 9 has an upward-facing groove to accommodate the lower first flange plate 8. This arrangement allows for better connection of the first reinforcing plate 11 to the tower. In this embodiment, the top surface of the first reinforcing plate 11 is the same width as the portion of the first flange plate 8 that extends out of the first web plate 9. Depending on the actual situation, the top surface of the first reinforcing plate 11 can also extend beyond the first flange plate 8. If it extends beyond the first flange plate 8, a downward groove is also provided to accommodate the first flange plate 8 located above it.

[0040] Preferably, the longitudinal beam box further includes a first stiffening plate 10, which is spaced between the first web plates 9. The top and bottom surfaces of the first stiffening plate 10 are connected to the inner walls of the upper and lower first flange plates 8, respectively. By providing the first stiffening plate 10, the vertical support for the first flange plate 8 is increased, which better improves the stability of the connection between the first flange plate 8 and the first web plate 9, and also enhances the strength and rigidity of the longitudinal beam box to a certain extent. Figure 7 As shown, the position of the first stiffening plate 10 can correspond to the position of the first reinforcing plate 11, that is, to the outer wall and inner wall of the first web plate 9. Of course, according to actual requirements, the number of first stiffening plates 10 relative to the first reinforcing plate 11 can be more.

[0041] Preferably, the crossbeam box further includes a second reinforcing plate 5. The second reinforcing plate 5 is generally in the shape of a right-angled trapezoid, with the right-angled side at the same height as the second web plate 2. The top edge is attached to or connected to the upper second flange plate 1, and the bottom edge is attached to or connected to the lower second flange plate 1, extending beyond the second flange plate 1. More preferably, the portion of the second reinforcing plate 5 extending beyond the lower second flange plate 1 has its bottom surface flush with the bottom surface of the second flange plate 1. The arrangement of the second reinforcing plate 5 is similar to that of the first reinforcing plate 11, and will not be described in detail here. However, the crossbeam box and the vertical beam box are set according to actual construction requirements, and their dimensions are different. Similarly, the dimensions and spacing of the second reinforcing plate 5 and the first reinforcing plate 11 are also set according to actual construction requirements, and their dimensions and spacing are also different.

[0042] Preferably, the crossbeam box further includes a second stiffening plate 6, which is spaced between the second web plates 2. The arrangement of the second stiffening plate 6 is the same as that of the first stiffening plate 10, and will not be described in detail here. However, the crossbeam box and the vertical beam box are set according to the actual construction requirements and have different dimensions. Similarly, the dimensions and spacing of the second stiffening plate 6 and the first stiffening plate 10 are also set according to the actual construction requirements and are different.

[0043] Preferably, combined with Figure 3 As shown, the second web plate 2 is completely disconnected at the intersection with the lug plate 3, and the top and bottom surfaces of the lug plate 3 are flush with the top and bottom surfaces of the second web plate 2, respectively. The lug plate 3 can be connected to the second flange plate 1, ensuring that both the second flange plate 1 and the second web plate 2 can provide good support for the lug plate 3. The number of ear plates 3 is set according to the number of jacks for tensioning cables and the number of anchor ends for fixing cables. Each jack and anchor end of the fixing cable is connected to two ear plates 3 by a pin, that is, connected to a force-bearing ear plate combination. If there are jacks in different directions, the number of ear holes 7 can be determined according to the number of jacks. As shown in the figure of this embodiment, there are two force-bearing ear plate combinations. Each force-bearing ear plate combination has four ear holes 7 at the front and two ear holes 7 at the rear. The anchor box can fix four jacks at the front and two anchor ends of the fixing cables at the rear. It is not limited to each force-bearing ear plate combination only fixing one jack at the front and one anchor end of the fixing cable at the rear.

[0044] Preferably, combined with Figure 5 As shown, the portion of the ear plate 3 extending beyond the second web plate 2 is provided with an ear hole 7. A circular ear plate reinforcing plate 4 is provided around the ear hole 7, and the ear plate reinforcing plate 4 is fixedly connected to the ear plate 3. The ear plate reinforcing plate 4 can reinforce the position of the ear plate 3 connecting pin to prevent the ear hole 7 from being damaged.

[0045] Preferably, the second reinforcing plate 5 is arranged at intervals on the outside of the load-bearing lug assembly. The crossbeam box is generally located near the end or connected to the longitudinal beam box at the end. The second reinforcing plate 5 is positioned near the end of the crossbeam box relative to the load-bearing lug assembly, which can better reinforce the load-bearing position and make the load of the crossbeam box more evenly transferred to the longitudinal beam box.

[0046] This embodiment provides one application of a combined anchor box for the negative-angle vertical rotation of bridge arch ribs. It can be used in various types of structures where the arch rib is the main load-bearing structure. The installation of the arch rib employs a rotation construction method. This method involves dividing the arch ring or the entire superstructure into two half-spans (which can be of different lengths). These half-arches are prefabricated and assembled on both banks of the river using terrain or simple supports. Then, a power device is used to rotate the half-arches to the bridge axis position or design elevation to form the arch. Currently, the rotation construction of steel pipe arch rib bridges often uses a method that requires erecting a horizontal assembly and vertical lifting rotation during assembly. This involves first erecting a horizontal assembly support at a low position along the direction of the arch rib extension, and then rotating the arch rib from bottom to top to the bridge axis position or design elevation to form the arch. This embodiment applies this method to a new vertical assembly negative-angle rotation construction method, where the arch rib is rotated from top to bottom to the bridge axis position or design elevation to form the arch. Figure 8 and Figure 9 As shown, a tower 14 is installed behind the arch abutment, and a rear anchoring device 18 is installed behind the tower 14. A wind-staying cable fixing foundation 19 is installed in front of the tower 14. The top of the tower 14 is connected to the rear anchoring device 18 via an anchoring cable 15. One end of the anchoring cable 15 is connected to the rear anchoring jack at the top of the rear anchoring device 18, and the other end is connected to the top of the tower 14 via the anchoring cable anchoring end. A rotatable structure is installed at the lower end of the arch rib segment 17 closest to the arch abutment and connected to the arch abutment. The lower end of the arch rib segment 17 is fixed first and then assembled vertically upwards. In the rotation direction of the arch rib segment 17... The lowering cable 12 is installed at the rear of the arch rib segment 14. The lowering cable 12 is connected to the tower 14 via a tension jack 12 located at the top of the tower 14 and is pre-tightened. A wind-guiding cable 20 is installed at the lower front of the arch rib segment in the direction of rotation. The wind-guiding cable 20 is connected to the wind-guiding cable fixing foundation 19 via a front anchoring jack at the top of the wind-guiding cable fixing foundation 19 and is pre-tightened. After the arch rib segment is vertically assembled to the design height, the fixing at the lower end of the arch rib segment 17 is released, allowing the arch rib to rotate downwards to the design elevation under the coordinated action of the lowering cable 12 and the wind-guiding cable 20, using the rotatable structure as the rotation axis. During the above-mentioned arch rib rotation process, the tower 14 bears a large load from the vertical rotation and lowering of the arch rib segment 17. Especially at the moment when the fixing at the lower end of the arch rib segment 17 is released, the tower 14 will bear a large instantaneous force, which places high demands on the rigidity and strength of the tower 14. The combined anchor box of this embodiment is installed on the top of the tower. The crossbeam box is mainly used to connect the lowering cable 12 and the anchoring cable 15, ensuring the force transmission between them, and transmitting the vertical force during vertical rotation to the longitudinal beam box, which then transmits it to the tower 14 and the foundation. Figure 9As shown, a combined anchor box is installed on each of the two sides of the top of the tower 14. In this embodiment, two upward tensioning jacks 12 and two downward tensioning jacks 12 can be fixed to the front of each combined anchor box through the ear plate 3. The four tensioning jacks 12 are respectively suspended by the lowering cable 13 to the arch ring on the same side. The rear of each combined anchor box can be connected to two anchoring ends 16 of the anchoring cable through the ear plate 3. The anchoring cable 15 can be quickly connected to the tower 14 through the quick connection of the ear plate 3 and the anchoring ends 16 of the anchoring cable. In this embodiment, a combined anchor box consisting of longitudinal and transverse beam boxes is installed on top of the tower 14. The transverse beam box is positioned transversely along the bridge direction, and the anchor cable 15 and the lowering cable 13 are connected to the same long ear plate 3. This reduces the problem of tearing of the cable connection structure due to uneven horizontal force caused by the combined anchor box. Simultaneously, the top structure of the tower 14 is reinforced. Under high stress, the reinforced transverse and longitudinal beam boxes can also effectively reduce the probability of tower 14 deformation, allowing the load from the jacks to be distributed more evenly to the tower 14, reducing the probability of the tower 14 shifting or tilting during the arch rib rotation. It should also be noted that the combined anchor box of this embodiment can be applied to the construction of bridge arch ribs with negative angle vertical rotation, as well as the commonly used positive angle rotation construction of bridge arch ribs. Of course, it can also be applied to various situations involving jack connections, depending on the circumstances.

[0047] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A combined anchor box for negative angle vertical rotation of bridge arch ribs, characterized in that... include: The longitudinal beam box has at least two parts, including a first web and a first flange. At least two first webs are arranged in parallel. The top and bottom surfaces of the two first webs are connected by the first flanges, and the first flanges extend beyond the outer surfaces of the two first webs in the width direction. A crossbeam box, connected to the top surface of at least two longitudinal beam boxes, includes a combination of a second web plate, a second flange plate, and a load-bearing lug plate. At least two second web plates are arranged in parallel. The top and bottom surfaces of the two second web plates are connected by the second flange plate, and the second flange plate extends beyond the outer surfaces of the two second web plates in the width direction. The load-bearing lug plate combination includes at least two lug plates arranged at intervals. The lug plates cross through the second web plate in the width direction and are connected to the second web plate at the intersection. The portions in front of and behind the second web plate are provided with corresponding ear holes.

2. The combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 1, characterized in that: The longitudinal beam box also includes a first reinforcing plate, which is in the shape of a right-angled trapezoid. The right-angled side is at the same height as the first web plate. The top edge is attached to or connected to the first flange plate located above, and the bottom edge is attached to or connected to the first flange plate located below, and extends beyond the first flange plate.

3. The combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 1 or 2, characterized in that: The longitudinal beam box also includes a first stiffening plate, which is spaced apart between the first web plates.

4. The combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 1, characterized in that: The crossbeam box also includes a second reinforcing plate, which is in the shape of a right-angled trapezoid. The right-angled side is at the same height as the second web plate. The top edge is attached to or connected to the second flange plate located above, and the bottom edge is attached to or connected to the second flange plate located below, and extends beyond the second flange plate.

5. The combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 1 or 4, characterized in that: The crossbeam box also includes a second stiffening plate, which is spaced between the second web plates.

6. The combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 1 or 4, characterized in that: The second web plate is completely broken at the position where it intersects with the ear plate, and the top and bottom surfaces of the ear plate are flush with the top and bottom surfaces of the second web plate, respectively.

7. A combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 2, characterized in that: The first reinforcing plate extends beyond the first flange plate located below it, and its bottom surface is flush with the bottom surface of the first flange plate.

8. A combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 4, characterized in that: The second reinforcing plate extends beyond the second flange plate located below it, and its bottom surface is flush with the bottom surface of the second flange plate.

9. A combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 1, characterized in that: The portion of the ear plate extending beyond the second abdominal plate is provided with an ear hole, and an annular ear plate reinforcing plate is provided around the ear hole, and the ear plate reinforcing plate is fixedly connected to the ear plate.

10. A combined anchor box for negative angle vertical rotation of bridge arch ribs according to claim 4, characterized in that: The second reinforcing plate is spaced apart on the outside of the load-bearing lug assembly.

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