Bridge expansion joint connection anchor structure

Abstract

The present invention provides a bridge expansion joint connection anchoring structure, comprising a beam body, a beam body end cap and an expansion joint device, wherein the beam body and the beam body end cap are both provided with embedded anchor bars, the expansion joint device is provided on the beam body end cap, the expansion joint device comprises special-shaped steel and expansion joint annular bars, concrete is poured on the beam body and the beam body end cap, the expansion joint annular bars are located within the concrete, and the bridge expansion joint connection anchoring structure further comprises: connecting steel bars, steel mesh and at least two embedded steel plates, the two embedded steel plates are respectively provided on the beam body and the beam body end cap, the bottom surface of the embedded steel plates is connected to the embedded anchor bars; the connecting steel bars are arranged across the two embedded steel plates, the lower part of the connecting steel bars is respectively connected to the two embedded steel plates, the upper part of the connecting steel bars is connected to the expansion joint annular bars, the steel mesh is provided in the concrete, and the steel mesh is respectively connected to the connecting steel bars and the expansion joint annular bars. The present invention has the advantages of large fault tolerance and convenient welding and anchoring operation.

Description

Technical Field

[0001] The invention relates to the field of bridge expansion joint devices, and in particular to a bridge expansion joint connection anchoring structure. Background Art

[0002] In highway engineering, the connection and anchoring method between the bridge expansion joint device and the beam body is generally as follows: pre-embed anchor bars in the beam body, the pre-embedded anchor bars protrude from the beam surface, and when installing the expansion joint device, the annular bars of the expansion joint device are welded and anchored with the pre-embedded anchor bars. After installation, concrete is poured on the beam surface and one side of the expansion joint device. In the actual construction process, due to the following reasons, it is difficult for the annular bars to correspond to the pre-embedded anchor bars one by one, which has a great impact on the anchoring operation and quality. Reason 1. When the precast beam is produced, the beam body and the end cap need to be poured twice. Due to construction errors, the pre-embedded anchor bars are easy to deviate; Reason 2. The beam surface of the interchange area widens, and the wet joint width changes accordingly, and the pre-embedded anchor bars cannot be accurately set. In addition, after the precast beam is erected, during the construction of the pavement layer, construction vehicles need to pass frequently. The pre-embedded anchor bars protruding from the beam surface are very easy to be damaged and bent and deformed, and cannot remain the same. The performance of the steel bars that have been bent and then straightened will be reduced, affecting the structural performance of the highway. Summary of the invention

[0003] The purpose of the present invention is to provide a bridge expansion joint connection anchoring structure which has a large fault tolerance and is convenient for welding and anchoring.

[0004] In order to achieve the above-mentioned purpose, the bridge expansion joint connection anchoring structure provided by the present invention includes a beam body, a beam body end cap and an expansion joint device, the beam body and the beam body end cap are both provided with embedded anchor bars, the expansion joint device is arranged on the beam body end cap, the expansion joint device includes special-shaped steel and expansion joint annular bars, concrete is poured on the beam body and the beam body end cap, the expansion joint annular bars are located within the concrete, and the bridge expansion joint connection anchoring structure also includes: connecting steel bars, steel mesh and at least two embedded steel plates, the two embedded steel plates are respectively arranged in the beam body and the beam body end cap, and the bottom surface of the embedded steel plate is connected to the embedded anchor bars; the connecting steel bar is spanned on the two embedded steel plates, the lower part of the connecting steel bar is respectively connected to the two embedded steel plates, on the horizontal projection plane, the projection of the connecting steel bar falls on the embedded steel plate, the upper part of the connecting steel bar is connected to the expansion joint annular bars, and the steel mesh is respectively connected to the connecting steel bar and the expansion joint annular bars.

[0005] It can be seen from the above scheme that by respectively arranging embedded steel plates on the beam body and the beam body end cap, it is only necessary to ensure that the embedded steel plates are flush with the top surfaces of the corresponding beam body or the beam body end cap, and the arrangement of the embedded steel plates will not be affected by the secondary pouring; the embedded anchor bars are connected to the connecting steel bars through the embedded steel plates. Since the embedded steel plates themselves have a preset width and length, the area in which the embedded anchor bars and the connecting steel bars can be connected to the embedded steel plates becomes larger. Even if the embedded anchor bars or the connecting steel bars have position deviations in the transverse and longitudinal directions, they can be fixedly connected to the embedded steel plates, which is convenient for welding and anchoring operations and is not affected by construction errors, which is beneficial to improving the quality of welding and anchoring and ensuring the structural strength of the bridge; by arranging the steel mesh, the connection between the connecting steel bars and the expansion joint annular bars is made more firmly, which is beneficial to the structural strength of the expansion joint accessories of the bridge.

[0006] A further solution is that the top surface of the embedded steel plate is flush with the top surface of the beam body and the top surface of the beam body end cap.

[0007] It can be seen from the above scheme that by setting the embedded steel plate flush with the beam surface, it is convenient for construction vehicles to pass through and can protect the embedded anchor bars and embedded steel plates from bending and deformation.

[0008] A further solution is that the connecting steel bar includes a lower connecting part, a middle connecting part and an upper connecting part, the lower connecting part and the upper connecting part are connected to two ends of the middle connecting part, and the lower connecting part is welded to the embedded steel plate.

[0009] A further solution is that the expansion joint annular reinforcement includes an upper annular segment, a middle annular segment and a lower annular segment, the upper annular segment and the lower annular segment are connected at both ends of the middle annular segment, the upper annular segment is connected to the upper connecting portion, the lower annular segment is located between the upper connecting portion and the lower connecting portion, and the lower annular segment is connected to the steel mesh.

[0010] It can be seen from the above scheme that the embedded steel plate and the expansion joint annular reinforcement are connected by connecting steel bars. During the construction process, the height of the connecting steel bars can be pre-customized according to the actual height of the on-site expansion joint device to ensure the accurate installation position of the expansion joint device.

[0011] A further solution is that at least one first longitudinal steel bar is provided on one side of the expansion joint device, the first longitudinal steel bar extends along the extension direction of the expansion joint device, and the first longitudinal steel bar is fixedly connected to the upper connecting portion and the upper annular segment respectively.

[0012] A further solution is that the steel mesh includes a plurality of first transverse steel bars and a plurality of second longitudinal steel bars, the first transverse steel bars and the second longitudinal steel bars are arranged in a crisscross manner, and the steel mesh is respectively connected to the lower annular segment and the middle connecting portion.

[0013] A further solution is that the number of expansion joint annular ribs is set to multiple, and the multiple expansion joint annular ribs are arranged along the extension direction of the special-shaped steel, and the embedded steel plates and connecting steel bars are arranged corresponding to the expansion joint annular ribs above and below.

[0014] A further solution is that the first transverse steel bars of the steel mesh are arranged corresponding to the expansion joint annular bars, and in the extension direction of the special-shaped steel, the connecting steel bars and the first transverse steel bars are arranged on both sides of the expansion joint annular bars.

[0015] A further solution is that, on the horizontal projection plane, the projection of the expansion joint annular reinforcement and the projection of the first transverse reinforcement both fall on the embedded steel plate.

[0016] It can be seen from the above scheme that the embedded steel plate is determined according to the spacing of the expansion joint annular reinforcement. The width of the embedded steel plate is large and has a large tolerance for deviation. Even if there is a deviation between the position of the expansion joint annular reinforcement and the embedded anchor reinforcement, it can be welded and anchored by the embedded steel plate, which brings convenience to on-site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0018] Figure 2 2 is a top view of an embodiment of the present invention.

[0019] Figure 3 2 is a structural diagram of connecting steel bars in an embodiment of the present invention.

[0020] Figure 4 is a structural diagram of an expansion joint device in an embodiment of the present invention.

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0022] See also Figures 1 to 4 The bridge expansion joint connection anchoring structure provided in this embodiment is arranged on both sides of the expansion joint 1, and the bridge expansion joint connection anchoring structure includes a beam body 2, a beam body end cap 3, an expansion joint device 4, connecting steel bars 5, a steel mesh 6 and at least two embedded steel plates. The beam body end cap 3 is located on one side of the beam body 2, and the expansion joint 1 is formed between two adjacent beam body end caps 3. The expansion joint device 4 is arranged on the beam body end cap 3. After the expansion joint device 4 is installed, concrete needs to be poured on the beam body 2 and the beam body end cap 3, so that the expansion joint annular ribs 42 of the connecting steel bars 5, the steel mesh 6 and the expansion joint device 4 are all embedded in the concrete.

[0023] The beam body 2 and the beam body end cap 3 are cast in two times with concrete. Before casting concrete, the beam body 2 is pre-set with a first embedded anchor bar 21 and a first embedded steel plate 22. The first embedded steel plate 22 is located above the first embedded anchor bar 21. The bottom of the first embedded steel plate 22 is welded and fixed to the first embedded anchor bar 21. The top surface of the first embedded anchor bar 21 is flush with the top surface of the beam body 2. Before casting concrete, the beam body end cap 3 is pre-set with a second embedded anchor bar 31 and a second embedded steel plate 32. The second embedded steel plate 32 is located above the second embedded anchor bar 31. The bottom of the second embedded steel plate 32 is welded and fixed to the second embedded anchor bar 31. The top surface of the second embedded anchor bar 31 is flush with the top surface of the beam body 2, which is convenient for construction vehicles to pass on the beam surface and can protect the embedded anchor bars from bending and deformation damage.

[0024] In this embodiment, anchor bars and steel plates are embedded in the beam body 2 and the beam body end cap 3 respectively. During pouring, it is only necessary to ensure that the first embedded anchor bar 21 and the first embedded steel plate 22 in the beam body 2 are fixedly connected, and the second embedded anchor bar 31 and the second embedded steel plate 32 in the beam body end cap 3 are fixedly connected. There is no need to connect the first embedded steel plate 22 and the second embedded steel plate 32, so that the first embedded steel plate 22 and the second embedded steel plate 32 will not be affected by the secondary pouring, which is convenient for construction operation.

[0025] Expansion joint devices 4 are respectively provided on both sides of the expansion joint 1 in the width direction, and the two expansion joint devices 4 are symmetrically arranged about the center line of the expansion joint 1. The expansion joint device 4 includes a special-shaped steel 41 and a plurality of expansion joint annular ribs 42. The special-shaped steel 41 is provided on one side of the expansion joint 1 along the extension direction of the expansion joint 1. The plurality of expansion joint annular ribs 42 are evenly arranged along the extension direction of the special-shaped steel 41 on the side of the special-shaped steel 41 facing away from the expansion joint 1. The expansion joint annular ribs 42 are welded and fixed to the special-shaped steel 41. On the horizontal projection plane, the projection of the expansion joint annular ribs 42 passes through the beam body end cap 3 and falls on the beam body 2, that is, the expansion joint annular ribs 42 extend from the upper side of the beam body end cap 3 to the upper side of the beam body 2.

[0026] The connecting steel bar 5 is arranged across the first embedded steel plate 22 and the second embedded steel plate 32, the lower part of the connecting steel bar 5 is fixedly connected to the first embedded steel plate 22 and the second embedded steel plate 32 respectively, and the upper part of the connecting steel bar 5 is connected to the expansion joint annular rib 42. Specifically, the cross section of the connecting steel bar 5 is set to be "U"-shaped, and the connecting steel bar 5 includes a lower connecting part 53, a middle connecting part 52 and an upper connecting part 51. The middle connecting part 52 is extended in the vertical direction and arranged above the beam body 2, and the lower connecting part 53 and the upper connecting part 51 are connected in parallel to the upper and lower ends of the middle connecting part 52. The bottom surface of the lower connecting part 53 is welded and fixed to the first embedded steel plate 22 and the second embedded steel plate 32 at the same time. The upper connecting part 51 is used to be fixedly connected to the expansion joint annular rib 42.

[0027] The cross section of the expansion joint annular rib 42 is "U" shaped. The expansion joint annular rib 42 includes an upper annular segment 421, a middle annular segment 422 and a lower annular segment 423. The upper annular segment 421 and the lower annular segment 423 are connected in parallel to the upper and lower ends of the middle annular segment 422. In the vertical direction, the upper annular segment 421 and the upper connecting portion 51 have equal heights, and the upper annular segment 421 and the upper connecting portion 51 are staggered along the extension direction of the expansion joint 1. In the vertical direction, the distance between the upper annular segment 421 and the lower annular segment 423 is smaller than the distance between the lower connecting portion 53 and the upper connecting portion 51, that is, the lower annular segment 423 is located between the upper connecting portion 51 and the lower connecting portion 53, and the middle annular segment 422 is located on the side of the middle connecting portion 52 facing the expansion joint 1.

[0028] Two first longitudinal steel bars 7 are provided on one side of the expansion joint device 4. The first longitudinal steel bars 7 extend along the extension direction of the expansion joint 1. The first longitudinal steel bars 7 are fixedly connected to the upper ring segment 421 and the upper connecting portion 51, respectively. The first longitudinal steel bars 7 can be located below the upper ring segment 421 and the upper connecting portion 51 at the same time, and the first longitudinal steel bars 7 can also be located above the upper ring segment 421 and the upper connecting portion 51 at the same time. The first longitudinal steel bars 7 are welded and fixed to the upper ring segment 421 and the upper connecting portion 51, respectively.

[0029] The steel mesh 6 is arranged in the middle of the connecting steel bar 5, and the steel mesh 6 is respectively connected to the lower annular segment 423 and the middle connecting portion 52. Specifically, the steel mesh 6 includes a plurality of first transverse steel bars 61 and a plurality of second longitudinal steel bars 62, the first transverse steel bars 61 extend along the width direction of the expansion joint 1, and the second longitudinal steel bars 62 extend along the extension direction of the expansion joint 1, and the first transverse steel bars 61 and the second longitudinal steel bars 62 are arranged in a crisscross pattern.

[0030] exist Figure 2 In the embodiment, the first embedded steel plate 22 and the second embedded steel plate 32 are respectively arranged corresponding to the expansion joint annular rib 42, and the first transverse steel bar 61 of the steel mesh 6 is arranged corresponding to the expansion joint annular rib 42. In the extension direction of the expansion joint 1, the connecting steel bar 5 and the first transverse steel bar 61 are arranged on both sides of the expansion joint annular rib 42. In this embodiment, the length and width of the two embedded steel plates are both 100 cm, so that the embedded steel plates have a large tolerance for deviation, that is, on the horizontal projection plane, the projection of the expansion joint annular rib 42, the projection of the connecting steel bar 5, and the projection of the first transverse steel bar 61 all fall on the two embedded steel plates at the same time. In the extension direction of the expansion joint 1 and its width direction, even if the position of the expansion joint annular rib 42 is offset, the expansion joint annular rib 42 can still be accurately fixed and connected with the two embedded steel plates through the connecting steel bar 5. The anchoring structure of this embodiment has a large tolerance, which is convenient for operation and construction, and can reduce the adverse effects caused by position errors during operation and construction, thereby improving anchoring efficiency and quality.

[0031] In summary, it can be seen that the present invention arranges embedded steel plates on the beam body and the beam end respectively, and it only needs to ensure that the embedded steel plates are flush with the top surfaces of the corresponding beam body or the beam end, and the arrangement of the embedded steel plates is not affected by the secondary casting; the embedded anchor bars are connected to the connecting steel bars through the embedded steel plates, and since the embedded steel plates themselves have preset width and length, the area in which the embedded anchor bars and the connecting steel bars can be connected to the embedded steel plates is enlarged, and even if the embedded anchor bars or the connecting steel bars have position deviations in the horizontal and vertical directions, they can be fixedly connected to the embedded steel plates, which is convenient for welding and anchoring operations and is not affected by construction errors, which is beneficial to improving the quality of welding and anchoring and ensuring the structural strength of the bridge; by arranging the steel mesh, the connection between the connecting steel bars and the expansion joint annular bars is made more firmly, which is beneficial to the structural strength of the expansion joint accessories of the bridge.

[0032] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bridge expansion joint connection anchoring structure, comprising a beam body, a beam body end cap and an expansion joint device, wherein the beam body and the beam body end cap are both provided with embedded anchor bars, the expansion joint device is provided on the beam body end cap, the expansion joint device comprises special-shaped steel and expansion joint annular bars, concrete is poured on the beam body and the beam body end cap, and the expansion joint annular bars are located within the concrete, characterized in that: The bridge expansion joint connection anchoring structure further includes: connecting steel bars, steel mesh and at least two embedded steel plates, the two embedded steel plates are respectively arranged in the beam body and the beam body sealing end, and the bottom surface of the embedded steel plate is connected to the embedded anchor bar; The connecting steel bar is straddled on the two embedded steel plates, the lower part of the connecting steel bar is respectively connected to the two embedded steel plates, on the horizontal projection plane, the projection of the connecting steel bar falls on the embedded steel plate, the upper part of the connecting steel bar is connected to the expansion joint annular rib, and the steel mesh is respectively connected to the connecting steel bar and the expansion joint annular rib; The connecting steel bar comprises a lower connecting part, a middle connecting part and an upper connecting part, the lower connecting part and the upper connecting part are connected to two ends of the middle connecting part, and the lower connecting part is welded to the embedded steel plate; The expansion joint annular rib comprises an upper annular segment, a middle annular segment and a lower annular segment, the upper annular segment and the lower annular segment are connected to two ends of the middle annular segment, the upper annular segment is connected to the upper connecting portion, the lower annular segment is located between the upper connecting portion and the lower connecting portion, and the lower annular segment is connected to the steel mesh.

2. The bridge expansion joint connection anchoring structure according to claim 1, characterized in that: The top surface of the embedded steel plate is flush with the top surface of the beam body and the top surface of the beam body end cap.

3. The bridge expansion joint connection anchoring structure according to claim 1, characterized in that: At least one first longitudinal steel bar is arranged on one side of the expansion joint device, and the first longitudinal steel bar extends along the extension direction of the expansion joint device, and the first longitudinal steel bar is fixedly connected to the upper connecting portion and the upper annular segment respectively.

4. The bridge expansion joint connection anchoring structure according to claim 1, characterized in that: The steel mesh includes a plurality of first transverse steel bars and a plurality of second longitudinal steel bars, the first transverse steel bars and the second longitudinal steel bars are arranged in a crisscross manner, and the steel mesh is respectively connected to the lower annular segment and the middle connecting portion.

5. The bridge expansion joint connection anchoring structure according to any one of claims 1 to 4, characterized in that: The number of the expansion joint annular ribs is set to be multiple, and the multiple expansion joint annular ribs are arranged along the extension direction of the special-shaped steel, and the embedded steel plate and the connecting steel bar are both arranged corresponding to the expansion joint annular ribs up and down.

6. The bridge expansion joint connection anchoring structure according to claim 5, characterized in that: The first transverse steel bars of the steel mesh are arranged corresponding to the expansion joint annular bars, and in the extension direction of the special-shaped steel, the connecting steel bars and the first transverse steel bars are arranged on both sides of the expansion joint annular bars.

7. The bridge expansion joint connection anchoring structure according to claim 6, characterized in that: On the horizontal projection plane, the projection of the expansion joint annular reinforcement and the projection of the first transverse reinforcement both fall on the embedded steel plate.

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