A cable-beam anchoring assembly for a steel truss cable-stayed bridge

Abstract

The embodiment of the present invention discloses a steel truss cable-stayed bridge cable-beam anchoring assembly, including an anchor force transmission vertical plate, a steel anchor cylinder, a steel anchor pipe, a pressure pad and a sealing anchor pad. An anchor force transmission vertical plate is respectively arranged above the main truss top plate and located at the positions of the node plates on both sides of the main truss. The steel anchor cylinder is arranged in the middle of the two anchor force transmission vertical plates, and the steel anchor cylinder is connected to the anchor force transmission vertical plate through the pressure plate. The steel anchor pipe is arranged in the steel anchor cylinder, the pressure pad is fixedly connected and sealed to the bottom end of the steel anchor cylinder, the sealing anchor pad is fixedly connected and sealed to the top end of the steel anchor cylinder, and the top end of the steel anchor pipe passes through the sealing anchor pad upward. The present invention utilizes a double anchor plate-anchor cylinder combined anchor assembly to connect the main beam and the cable. The assembly has a simple structural form, a clear force transmission path, and clear manufacturing and processing processes of the components. Under the premise of meeting the load-bearing requirements, the eccentricity problem caused by welding deformation can be appropriately reduced to ensure the quality of the weld, while achieving easy inspection, measurement and maintenance of the anchor assembly.

Description

Technical Field

[0001] The embodiment of the present invention relates to the technical field of steel truss cable-stayed bridges, and in particular to a cable-beam anchoring assembly for steel truss cable-stayed bridges. Background Art

[0002] With the development of dual-use cable-stayed bridges for highway and railway, the large-tonnage cable loads put forward higher requirements for the anchor connection between the cable and the steel beam. The anchor connection between the cable and the steel main beam directly transmits the cable force response of the cable. The local structural space is limited and the connection form is complex. The design should try to ensure an efficient stress transfer path to avoid prominent stress concentration positions. Common cable-beam anchorage types for large-span steel box girder cable-stayed bridges include anchor box connection, single anchor plate connection, ear plate connection, and anchor pipe connection. The main beams of large-span dual-use cable-stayed bridges and railway bridges often adopt steel truss beams. In order to utilize the main truss node plate, the cable-beam anchorage structure is mostly set at the node of the main beam. By improving and upgrading the common cable-beam anchorage types of large-span steel box girder cable-stayed bridges, they can be mainly divided into two categories: main truss internal type and main truss external type. The internal type mainly adopts anchor box connection, and the external type mainly adopts double anchor plate-anchor box connection.

[0003] The built-in type mainly adopts anchor box connection, which can be divided into chord built-in anchor box and node plate built-in anchor box according to the different connection positions between the anchor box and the steel beam. The anchor point of the chord built-in anchor box is located inside the chord, the structural operation space is narrow, the manufacturing and installation difficulty coefficient is high, and the problem becomes more obvious as the angle between the cable and the upper chord increases. The node plate built-in anchor box anchors the inclined cable in the node plate, and the force transmission steel plate is directly welded to the node plate. The cable force is transmitted through the weld between the anchor box and the node plate. In this structure, the operating space for cable installation and maintenance is not restricted, but the node structure is complex, the anchor pipe runs through the chord, and the cross-section weakening effect is inevitable.

[0004] The external type mainly adopts the double anchor plate-anchor box connection. The anchoring structure anchors the inclined cable above the top plate of the main truss upper chord node. The force transmission vertical plate is welded to the node plate position of the upper chord top plate, or is formed by the node plates on both sides of the upper chord node extending upward. The cable force is transmitted through the welds of the anchor box and the force transmission vertical plate between the two-side force transmission vertical plates. This type of connection has a simple structure, a clear force path, and a relatively convenient manufacturing, installation and maintenance process. However, there are certain difficulties in the early welding control of the anchor box welds, anchor box stiffening plates and their internal welds, as well as the later inspection and maintenance.

[0005] The above-mentioned cable-beam anchoring structure has certain deficiencies in structural manufacturing and maintenance, and a new cable-beam anchoring structure type needs to be designed. Summary of the invention

[0006] To this end, an embodiment of the present invention provides a steel truss cable-stayed bridge cable-beam anchoring assembly to solve the above-mentioned deficiencies in the structure manufacturing and maintenance of the cable-beam anchoring structure in the prior art.

[0007] In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

[0008] According to an embodiment of the present invention, there is provided a cable-beam anchoring assembly for a steel truss cable-stayed bridge, comprising an anchor force transmission vertical plate, a steel anchor barrel, a steel anchor pipe, a pressure-bearing pad and an anchor sealing pad. The anchor force transmission vertical plate is welded to the steel truss as a whole, and an anchor force transmission vertical plate is respectively arranged above the main truss top plate and at the positions of the node plates on both sides of the main truss. The steel anchor barrel is arranged in the middle of the two anchor force transmission vertical plates, and the steel anchor barrel is connected to the anchor force transmission vertical plate through the pressure-bearing plate. The steel anchor pipe is arranged in the steel anchor barrel and is used for the inclined cable to pass through the anchoring assembly. The pressure-bearing pad is fixedly connected and sealed to the bottom end of the steel anchor barrel, and the anchor sealing pad is fixedly connected and sealed to the top end of the steel anchor barrel, and the top end of the steel anchor pipe passes through the anchor sealing pad upward.

[0009] Furthermore, the anchor force transmission vertical plate is vertically arranged so that the two anchor force transmission vertical plates are arranged in parallel, and the pressure plate is arranged perpendicular to the anchor force transmission vertical plate so that one side of the pressure plate is welded to the middle of the plate surface of the anchor force transmission vertical plate, and the other side of the pressure plate is welded to the outer wall of the steel anchor tube.

[0010] Furthermore, a pressure-bearing stiffening plate is fixedly connected to the plate surface of the pressure-bearing plate, the pressure-bearing stiffening plate is arranged perpendicular to the pressure-bearing plate, and one end of the pressure-bearing stiffening plate is welded to the pressure pad, and the other end is welded to the anchor pad, wherein the length of the pressure-bearing plate is consistent with the length of the steel anchor tube.

[0011] Furthermore, the upper plate surface and the lower plate surface of the pressure-bearing plate are respectively fixedly connected with pressure-bearing stiffening plates.

[0012] Furthermore, the end portion where the pressure-bearing plate is connected to the anchor force transmission vertical plate is an arc-shaped transition structure on the pressure-bearing pad side.

[0013] Furthermore, an anchor barrel stiffening plate is welded to the outer wall of the steel anchor barrel, one end of the anchor barrel stiffening plate is welded to the pressure-bearing pad, and the other end is welded to the anchor sealing pad.

[0014] Furthermore, a plurality of anchor barrel stiffening plates are provided, and the plurality of anchor barrel stiffening plates are equidistantly distributed along the circumferential direction of the steel anchor barrel.

[0015] Furthermore, the plate surfaces of the pressure-bearing pad and the anchor-sealing pad are both arranged perpendicular to the steel anchor tube, and the sizes of the pressure-bearing pad and the anchor-sealing pad are consistent.

[0016] The embodiments of the present invention have the following advantages: by setting a double anchor plate-anchor cylinder combined cable-beam anchoring assembly, it is composed of a force transmission part and an anchoring part. The force transmission part is a pair of anchor force transmission vertical plates welded as one with the steel beam, and the anchoring part is a steel anchor cylinder connected to the anchor force transmission vertical plates through a pressure plate. The inclined cable passes through the steel anchor tube inside the steel anchor cylinder and is anchored on the pressure pad. The load is transmitted with the help of the anchor force transmission vertical plates. Therefore, under the premise of meeting the bearing force, it has a simple structural form and a clear force transmission path, the manufacturing and processing technology is clear and the control method is fixed, the weld quality and structural state are easy to control and detect, which provides convenient conditions for the detection, maintenance and repair of the cable-beam anchoring assembly, and has wide practicality for cable-stayed bridges with railway loads and light rail loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0019] Figure 1 A schematic diagram of the overall structure of a cable-beam anchoring assembly for a steel truss cable-stayed bridge provided by an embodiment of the present invention;

[0020] Figure 2 for Figure 1 AA view in the figure;

[0021] Figure 3 for Figure 1 BB view in the figure.

[0022] In the figure: 1. Anchor force transmission vertical plate; 2. Steel anchor cylinder; 3. Steel anchor pipe; 4. Pressure-bearing pad; 5. Sealing anchor pad; 6. Anchor cylinder stiffening plate; 7. Pressure-bearing plate; 8. Pressure-bearing stiffening plate. DETAILED DESCRIPTION

[0023] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example

[0025] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a cable-beam anchoring assembly for a steel truss cable-stayed bridge, comprising an anchor force transmission vertical plate 1, a steel anchor barrel 2, a steel anchor pipe 3, a pressure pad 4 and an anchor sealing pad 5. The anchor force transmission vertical plate 1 is welded to the steel truss as a whole, and an anchor force transmission vertical plate 1 is respectively arranged above the main truss top plate and located at the position of the node plates on both sides of the main truss. The steel anchor barrel 2 has good overall stiffness performance due to its cylindrical structure, and can be directly used for the anchoring and cable force transmission of the inclined cable. It is arranged in the middle of the two anchor force transmission vertical plates 1, and the steel anchor barrel 2 is connected to the anchor force transmission vertical plate 1 through a pressure plate 7. Among them, the length of the pressure plate 7 is consistent with the length of the steel anchor barrel 2, and it is connected to the anchor force transmission vertical plate 1 through the pressure plate 7, which reduces the number of plate processing, avoids the number of additional welds, and can effectively reduce the eccentricity problem caused by welding deformation.

[0026] The steel anchor pipe 3 is arranged in the steel anchor barrel 2, and is provided for the inclined cable to pass through and be anchored. The pressure-bearing pad 4 is fixedly connected and sealed to the bottom end of the steel anchor barrel 2, so that the anchoring end of the steel anchor barrel 2 passes through the pressure-bearing pad 4, which is used to anchor the inclined cable anchor barrel and diffuse and transfer the compressive stress. The size of the pressure-bearing pad 4 can be adjusted according to the type of inclined cable anchor and the stress distribution. The sealing anchor pad 5 is fixedly connected and sealed to the top of the steel anchor barrel 2, and the top of the steel anchor pipe 3 passes through the sealing anchor pad 5 upwards. The sealing anchor pad 5 on the top of the steel anchor barrel 2 is used to seal and fix the steel anchor barrel 2 to ensure the anti-corrosion state inside the steel anchor barrel 2. Among them, the plate surfaces of the pressure-bearing pad 4 and the sealing anchor pad 5 are both arranged vertically to the steel anchor barrel 2, and the outer width and height dimensions of the sealing anchor pad 5 are consistent with those of the pressure-bearing pad 4.

[0027] As mentioned above, combined Figure 3 As shown, the anchor force transmission vertical plate 1 is vertically arranged, so that the two anchor force transmission vertical plates 1 are arranged in parallel. The pressure plate 7 is arranged perpendicular to the anchor force transmission vertical plate 1, so that one side of the pressure plate 7 is welded to the middle of the plate surface of the anchor force transmission vertical plate 1, and the other side of the pressure plate 7 is welded to the outer wall of the steel anchor cylinder 2. Among them, the end of the pressure plate 7 connected to the anchor force transmission vertical plate 1 is an arc-shaped transition structure on the side of the pressure pad 4.

[0028] Furthermore, a pressure-bearing stiffening plate 8 is fixedly connected to the plate surface of the pressure-bearing plate 7. The pressure-bearing stiffening plate 8 is arranged perpendicular to the pressure-bearing plate 7, and one end of the pressure-bearing stiffening plate 8 is welded to the pressure-bearing pad 4, and the other end is welded to the sealing anchor pad 5. The pressure-bearing stiffening plate 8 can effectively reduce the local excessive compressive stress and avoid stress concentration. The pressure-bearing stiffening plates 8 are fixedly connected to the upper plate surface and the lower plate surface of the pressure-bearing plate 7, respectively.

[0029] Furthermore, an anchor cylinder stiffening plate 6 is welded on the outer wall of the steel anchor cylinder 2. One end of the anchor cylinder stiffening plate 6 is welded to the pressure bearing pad 4, and the other end is welded to the sealing anchor pad 5. The arrangement of the anchor cylinder stiffening plate 6 is used to strengthen the rigidity of the steel anchor cylinder 2. Among them, the anchor cylinder stiffening plate 6 is provided with a plurality of Figure 2 or Figure 3 6a~6k shown, and a plurality of anchor barrel stiffening plates 6 are equidistantly distributed along the circumferential direction of the steel anchor barrel 2, and their number can be adjusted accordingly according to the cable force requirements.

[0030] The embodiment of the present invention arranges a double anchor plate-anchor barrel combined cable-beam anchoring assembly, which consists of a force transmission part and an anchoring part. The force transmission part is a pair of anchor force transmission vertical plates 1 welded as one body with the steel beam, and the anchoring part is a steel anchor barrel 2 connected to the anchor force transmission vertical plate 1 through a pressure-bearing plate 7. The inclined cable passes through the steel anchor pipe 3 inside the steel anchor barrel 2 and is anchored on the pressure-bearing pad 4. The load is transmitted by means of the anchor force transmission vertical plate 1, so that the main beam and the cable are connected by the double anchor plate-anchor barrel combined anchoring assembly. The assembly has a simple structural form, a clear force transmission path, and clear manufacturing and processing technology of the component. Under the premise of meeting the load-bearing force, the eccentricity problem caused by welding deformation can be appropriately reduced. At the same time, the weld quality and structural state are easy to control and detect, which is convenient for the detection, maintenance and repair of the anchor assembly during the operation period of the bridge. It has wide practicality for cable-stayed bridges with railway loads and light rail loads.

[0031] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A cable-beam anchoring assembly for a steel truss cable-stayed bridge, characterized in that: The anchor assembly of the steel truss cable-stayed bridge comprises an anchor force transmission vertical plate, a steel anchor barrel, a steel anchor pipe, a pressure pad and a sealing anchor pad, the anchor force transmission vertical plate is welded to the steel truss beam as a whole, and an anchor force transmission vertical plate is respectively arranged above the main truss top plate and at the position of the node plates on both sides of the main truss, the steel anchor barrel is arranged in the middle of the two anchor force transmission vertical plates, and the steel anchor barrel is connected to the anchor force transmission vertical plate through the pressure bearing plate, the steel anchor pipe is arranged in the steel anchor barrel, and the inclined cable passes through the anchor assembly, the pressure bearing pad is fixedly connected and sealed at the bottom end of the steel anchor barrel, the sealing anchor pad is fixedly connected and sealed at the top end of the steel anchor barrel, and the top end of the steel anchor pipe passes through the sealing anchor pad upward, a pressure bearing stiffening plate is fixedly connected to the plate surface of the pressure bearing plate, the pressure bearing stiffening plate is arranged perpendicular to the pressure bearing plate, and one end of the pressure bearing stiffening plate is welded to the pressure bearing pad, and the other end is welded to the sealing anchor pad, wherein the length of the pressure bearing plate is consistent with the length of the steel anchor barrel; The anchor force transmission vertical plate is vertically arranged, so that the two anchor force transmission vertical plates are arranged in parallel, and the pressure plate is arranged perpendicular to the anchor force transmission vertical plate, so that one side of the pressure plate is welded to the middle of the plate surface of the anchor force transmission vertical plate, and the other side of the pressure plate is welded to the outer wall of the steel anchor cylinder; The upper plate surface and the lower plate surface of the pressure plate are respectively fixed with pressure-bearing stiffening plates; the outer wall of the steel anchor cylinder is welded with an anchor cylinder stiffening plate, one end of the anchor cylinder stiffening plate is welded to the pressure pad, and the other end is welded to the anchor sealing pad.

2. A steel truss cable-stayed bridge cable-beam anchoring assembly according to claim 1, characterized in that: The end portion where the pressure-bearing plate is connected to the anchor force-transmitting vertical plate is an arc-shaped transition structure on the pressure-bearing pad side.

3. The steel truss cable-stayed bridge cable-beam anchoring assembly according to claim 1, characterized in that: The anchor barrel stiffening plates are provided in a plurality and are distributed equidistantly along the circumferential direction of the steel anchor barrel.

4. The steel truss cable-stayed bridge cable-beam anchoring assembly according to claim 1, characterized in that: The plate surfaces of the pressure-bearing pad and the anchor-sealing pad are both arranged perpendicularly to the steel anchor tube, and the sizes of the pressure-bearing pad and the anchor-sealing pad are consistent.

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