Fabricated quick-release bridge expansion device

Abstract

The utility model relates to an assembly type quick-release bridge expansion device, which comprises an edge beam, a steel bottom plate and a steel side plate, the steel bottom plate and the steel side plate are respectively arranged on the bottom wall and the side wall of a notch of a bridge expansion joint, a connecting groove is arranged on the edge beam, and the connecting groove is arranged on the steel bottom plate and connected with the steel side plate. The bridge expansion device has the advantages that the time for replacing the bridge expansion device can be shortened, the maintenance time of newly poured concrete in the later period is prolonged, the anchoring performance of the bridge expansion device is improved, the possibility of concrete cracking or deformation is reduced, and the maintenance and repair cost of the bridge expansion device is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, in particular to the technical aspect of expansion joints, and specifically relates to an assembled quick-disassembly bridge expansion device. Background Art

[0002] To accommodate structural deformation, expansion gaps, often reserved between the bridge decks at the ends of the bridge superstructure, or between the bridge decks and abutments, are called expansion joints. To ensure smooth vehicle passage through expansion joints and accommodate structural deformation, various devices installed across these joints are collectively referred to as bridge expansion devices. Currently, expansion joints typically have slots in which expansion devices are installed. Repeated impact from vehicle loads can cause concrete cracking within the slots, leading to anchor failure, or cumulative fatigue damage to the expansion device's steel components, ultimately rendering the bridge expansion device inoperable and requiring replacement.

[0003] Current replacement methods, such as a repair method for a bridge expansion joint disclosed in patent document CN106906740A, include laying out and positioning the damaged repair area of the bridge expansion joint to determine the area to be repaired; using a cutting machine to cut the area to be repaired; using a jackhammer to chisel away the surface concrete of the expansion joint anchoring area until the anchor of the steel bar protective layer is exposed; providing an anchoring enlargement area outside the expansion joint anchoring area, using a jackhammer to chisel away the concrete in the anchoring enlargement area to the base surface of the main beam structure; then installing steel bars and planting steel bars in the anchoring enlargement area; pouring epoxy resin concrete into the expansion joint anchoring area and the anchoring enlargement area; and maintaining.

[0004] However, in actual construction, the traffic control time allowed for replacing the expansion joint is usually very short, especially on roads with heavy traffic, where the allowed traffic control time is even shorter, resulting in a very tight time for replacing the expansion joint. In the process of dismantling the old expansion joint, in order to protect the bridge structure, it is usually prohibited to use large mechanical equipment to chisel out the concrete in the expansion joint groove, and only manual chiseling is allowed. However, due to the high strength of the concrete in the expansion joint anchoring area and the large number of steel bars set in the concrete, the expansion joint removal process will take a lot of time. Under the condition of a certain traffic control time, the subsequent concrete pouring and curing time will inevitably be compressed. Although expensive fast-hardening concrete is now used for repairing expansion joints, the strength of the concrete can meet the design requirements after curing for 3 hours after pouring, but in fact the elastic modulus of the concrete has not yet met the expected requirements, that is, its ability to resist deformation due to external forces has not yet met the use requirements, resulting in the concrete being easily deformed or cracked, which will directly affect the service life of the bridge expansion joint. Utility Model Content

[0005] In order to improve the problem that the time required to dismantle the telescopic device is too long, resulting in a short curing time for pouring new concrete, the utility model provides an assembled quick-disassembly bridge telescopic device. The specific technical solution is as follows:

[0006] An assembled quick-detachable bridge expansion device includes side beams, and also includes a steel bottom plate and steel side plates respectively arranged on the bottom wall and side walls of the bridge expansion joint slot. The side beams are provided with connecting grooves, which are arranged on the steel bottom plate and connected to the steel side plates.

[0007] When the expansion joint device needs to be replaced, the connecting groove is disassembled from the steel bottom plate and the steel side plate respectively, the expansion device and the groove can be separated, and then the new expansion device is installed on the steel bottom plate and the steel side plate. This can shorten the removal time of the expansion device in the early stage of replacement, increase the maintenance time of the newly poured concrete in the later stage, improve the ability of the concrete in the expansion joint groove to resist external force deformation, and reduce the possibility of concrete cracking.

[0008] In a specific possible implementation scheme, a plurality of anchor plates are provided on the side beams, and anchor pieces connected to the anchor plates are provided in the connection grooves; the anchor pieces are specifically steel bars or steel plates.

[0009] Anchors corresponding to the anchor plates are installed in the connecting grooves to facilitate connection of the side beams to the connecting grooves, which is beneficial to improving the structural strength of the telescopic device.

[0010] In a specific possible implementation scheme, the steel side plates and the steel bottom plates are both provided with a plurality of connecting sleeves, the connecting sleeves are arranged in the bridge components, and the connecting grooves are provided with bolts threadedly connected to the connecting sleeves.

[0011] When installing a new telescopic device, the connecting sleeve is embedded in the interior of the bridge component, thereby fixing the steel side plate and the steel bottom plate in the groove, and the connecting groove is placed on the steel bottom plate, with its side wall fitting with the steel side plate, and connected to the connecting sleeve with bolts, so that the connecting groove can be connected to the steel side plate and the steel bottom plate, thereby realizing the installation of the telescopic device.

[0012] In a specific possible implementation scheme, the connecting groove includes a connecting plate and two side plates, the connecting plate is connected to the two side plates, the two side plates and the connecting plate form a through groove for concrete filling, one of the side plates is connected to the side beam, the other side plate is connected to the steel side plate, and the connecting plate is connected to the steel bottom plate.

[0013] In one specific embodiment, a cover plate is provided between the side plate and the side beam near the steel side plate. The cover plate is positioned above and below the connecting plate. Because vehicles traveling on the telescopic device can impact the side plate, which can easily cause deformation, the cover plate is used to connect the side beam and the side plate to minimize deformation caused by impact.

[0014] In one specific embodiment, the cover plate is provided with a marking portion for marking the position of the connecting sleeve. Using the marking portion to mark the position of the connecting sleeve facilitates targeted cleaning of the concrete at the connecting sleeve when removing the telescopic device, thereby improving the efficiency of replacing the telescopic device.

[0015] In a specific possible implementation manner, the upper surface of the cover plate is provided with anti-slip grooves; or the cover plate is provided with a plurality of through holes.

[0016] By providing anti-slip grooves or multiple through holes on the cover plate, the friction of the vehicle walking on the telescopic device can be increased to prevent the vehicle from slipping; in addition, when pouring concrete, air is discharged through the through holes to facilitate concrete pouring, making the concrete pouring in the expansion joint groove more compact.

[0017] In a specific embodiment, the through hole is located above the connecting sleeve.

[0018] The position of the connecting sleeve is marked by the through hole. On the one hand, it is easy to find the position of the connecting sleeve. On the other hand, the concrete can be easily chiseled out through the through hole, so that the telescopic device can be quickly replaced.

[0019] The beneficial technical effects of the utility model are as follows: by directly separating the bottom plate and side plates in the connecting groove and the expansion joint slot, and then installing a new expansion device, the efficiency of replacement can be improved, the curing time of the newly poured concrete in the later stage is increased, and the strength and elastic modulus of the concrete in the slot are improved; by adding a steel bottom plate and steel side plates to the bottom wall and side wall of the bridge expansion joint slot, the rigidity of the expansion joint slot is improved, and at the same time, the components associated with the bridge expansion joint slot are protected, avoiding damage to the bridge deck or abutment back wall caused by repeated chiseling of the slot concrete when replacing the expansion device, thereby enhancing the anchoring performance of the expansion device and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of an assembled quick-detachable bridge expansion device according to Example 1 of the present utility model.

[0021] Figure 2 It is a cross-sectional view of an assembled quick-disassembly bridge expansion device according to Example 2 of the present utility model.

[0022] Explanation of the accompanying drawings: 1. Steel bottom plate; 2. Steel side plate; 3. Connecting sleeve; 4. Center beam; 5. Side beam; 6. Connecting groove; 7. Side plate; 8. Connecting plate; 9. Through groove; 10. Bolt; 11. Anchor plate; 12. Anchor; 13. Cover plate; 15. Through hole. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-2The utility model is described in further detail.

[0024] Example 1

[0025] Reference Figure 1 A prefabricated quick-disassembly bridge expansion joint device includes a steel base plate 1 and steel side plates 2, which are respectively arranged on the bottom wall and side walls of the bridge expansion joint slot. The steel side plates 2 and the steel base plate 1 are each provided with a plurality of connecting sleeves 3, and the connecting sleeves 3 are arranged within the bridge component. Specifically, the connecting sleeves 3 and the steel side plates 2 and steel base plate 1 connected to the connecting sleeves 3 can all be pre-buried within the bridge expansion joint slot; alternatively, when repairing or replacing the expansion joint device, the anchoring steel bars at the original slot can be removed, and then holes can be drilled in the slot to embed the connecting sleeves 3, and then rebar embedding glue can be poured in, so that the connecting sleeves 3, steel base plate 1, and steel side plates 2 can be installed within the bridge expansion joint slot.

[0026] It also includes at least one center beam 4 and two side beams 5. In this embodiment, there is one center beam 4, which is located between the two side beams 5. The side beams 5 and the center beam 4 are connected by waterproof rubber. In other embodiments, the telescopic device may not be provided with a center beam. A connecting groove 6 is provided on the side beam 5. The connecting groove 6 is provided on the steel bottom plate 1 and connected to the steel side plate 2.

[0027] Specifically, the connection groove 6 includes a connection plate 8 and two side plates 7. The connection plate 8 is connected to the two side plates 7. In this embodiment, the two side plates 7 and the connection plate 8 are integrally formed and U-shaped. In other embodiments, the side plates 7 and the connection plates 8 can also be directly welded to each other. The two side plates 7 and the connection plates 8 form a through groove 9 for filling with concrete.

[0028] One of the side plates 7 is connected to the side beam 5, the other side plate 7 is connected to the steel side plate 2, and the connecting plate 8 is connected to the steel bottom plate 1. In this embodiment, the side plates 7 and the connecting plate 8 are both provided with bolts 10 that penetrate into the connecting sleeve 3 and are threadedly connected to the connecting sleeve 3.

[0029] In other embodiments, the side plates 7 and the steel side plates 2 , and the connecting plates 8 and the steel bottom plate 1 may also be connected by welding.

[0030] A plurality of anchor plates 11 are provided on the side beam 5, and an anchor piece 12 connected to the anchor plate 11 is provided in the connecting groove 6. In this embodiment, the anchor piece 12 is provided on the connecting plate 8, and in other embodiments, the anchor piece 12 is provided on the side plate 7.

[0031] In this embodiment, the anchoring piece is an anchoring steel bar. In other embodiments, the anchoring piece 12 is specifically an anchoring plate.

[0032] The anchoring piece 12 and the connecting plate 8 or the side plate 7 may be connected by welding, riveting or bolting.

[0033] A cover plate 13 is provided between the side plate 7 and the side beam 5 near the steel side plate 2. Cover plate 13 is arranged along the length of the side beam 5 and is positioned vertically opposite the connecting plate 8. In this embodiment, cover plate 13 is welded to both the side beam 5 and the side plate 7; in other embodiments, cover plate 13 is bolted to both the side beam 5 and the side plate 7. When installing the telescopic device, concrete is first poured into the through groove, and then cover plate 13 is installed. To prevent slipping, the upper surface of cover plate 13 is also provided with anti-slip grooves.

[0034] The cover plate 13 is further provided with a marking portion, which is used to mark the position of the connecting sleeve. In this embodiment, the marking portion is specifically a bump provided on the cover plate 13 .

[0035] The implementation principle of the embodiment of the utility model patent is as follows: on a newly cast bridge, the connecting sleeve 3 is first embedded in the interior of the bridge component, that is, the steel side plate 2 and the steel bottom plate 1 are respectively installed on the side wall and bottom wall of the slot, and when installing the telescopic device, the connecting groove 6 is placed on the steel bottom plate 1, and at the same time fits the steel side plate 2, and the bolts 10 are inserted into the connecting sleeve 3 one by one and threadedly connected to the connecting sleeve 3, and formwork is installed at both ends of the connecting groove 6, and concrete is poured in the connecting groove 6. If the telescopic device does not have a welded cover plate 13 when it leaves the factory, the cover plate 13 is welded on site.

[0036] When the telescopic device needs to be repaired or replaced, the concrete below the marked part is chiseled off to expose the bolt 10. The bolt 10 is removed to separate the connecting groove 6 from the steel side plate 2 and the steel bottom plate 1. The old telescopic device is then lifted out of the groove and a new telescopic device is installed. The bolt 10 is screwed into the connecting sleeve 3 and concrete is poured to replace the telescopic device.

[0037] Example 2

[0038] The difference between this embodiment and embodiment 1 is that: Figure 2 The cover plate 13 is provided with a plurality of through holes 15, which are evenly distributed along the length direction of the cover plate 13, and the connecting sleeve 3 is located below the through holes 15; the cover plate 13 with through holes 15 can be pre-welded in the factory or welded on site.

[0039] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An assembled quick-disassembly bridge expansion device, comprising a side beam (5), characterized in that: It also includes a steel bottom plate (1) and a steel side plate (2) respectively arranged on the bottom wall and side wall of the bridge expansion joint slot, wherein the side beam (5) is provided with a connecting groove (6), and the connecting groove (6) is arranged on the steel bottom plate (1) and connected to the steel side plate (2); The steel side plates (2) and the steel bottom plate (1) are both provided with a plurality of connecting sleeves (3), the connecting sleeves (3) are arranged in the bridge, and the connecting grooves (6) are provided with bolts (10) threadedly connected to the connecting sleeves (3).

2. The assembled quick-disassembly bridge expansion device according to claim 1 is characterized in that: A plurality of anchor plates (11) are provided on the side beam (5), and an anchor piece (12) connected to the anchor plates (11) is provided in the connection groove (6).

3. The assembled quick-disassembly bridge expansion device according to claim 2 is characterized in that: The anchor (12) is a steel bar or a steel plate.

4. The assembled quick-disassembly bridge expansion device according to claim 1 is characterized in that: The connecting groove (6) includes a connecting plate (8) and two side plates (7), wherein the connecting plate (8) is connected to the two side plates (7), and the two side plates (7) and the connecting plate (8) form a through groove (9) for filling with concrete, wherein one of the side plates (7) is connected to the side beam (5), and the other side plate (7) is connected to the steel side plate (2), and the connecting plate (8) is connected to the steel bottom plate (1).

5. The assembled quick-disassembly bridge expansion device according to claim 4 is characterized in that: A cover plate (13) is provided between the side plate (7) and the side beam (5) close to the steel side plate (2), and the cover plate (13) and the connecting plate (8) are arranged opposite to each other in the upper and lower directions.

6. The assembled quick-disassembly bridge expansion device according to claim 5, characterized in that: The cover plate (13) is provided with a marking portion, and the marking portion is used to mark the position of the connecting sleeve.

7. The assembled quick-disassembly bridge expansion device according to claim 5, characterized in that: The upper surface of the cover plate (13) is provided with anti-slip grooves.

8. The assembled quick-disassembly bridge expansion device according to claim 5, characterized in that: The cover plate (13) is provided with a plurality of through holes (15).

9. The assembled quick-disassembly bridge expansion device according to claim 8, characterized in that: The through hole (15) is located above the connecting sleeve (3).

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