Split bridge expansion joint for easy replacement

Abstract

The utility model belongs to bridge expansion joint technical field, specifically disclose a split type bridge expansion joint convenient to replace, including two main girders, the main girder anchor bar of preburiing in main girer, the anchorage steel sheet, anchor bar and slot construction steel bar of setting at the slot, the side beam of being fixed as an organic whole with anchorage steel sheet, form expansion joint between two side beams, and the bridge deck pavement layer is paved at the slot, wherein: the main girder preburiing has multiple anchor bar connecting steel sheets, and the anchor bar connecting steel sheet is located just below the slot, the anchor bar is L shape, and one end of the anchor bar is fixed as an organic whole with side beam, and the other end of the anchor bar is fixed as an organic whole with anchor bar connecting steel sheet, and the top plate surface of anchor bar connecting steel sheet is fixed as an organic whole with the bottom plate surface of anchorage steel sheet, the height of slot is consistent with the height of bridge deck pavement layer, the utility model discloses because the structure, has shortened the replacement construction time and has reduced the replacement cost.

Description

Technical Field

[0001] This utility model belongs to the field of bridge expansion joint technology, specifically relating to a split-type bridge expansion joint that is easy to replace, shortens replacement construction time, and reduces replacement costs. Background Technology

[0002] Bridge expansion joints are a key component of the bridge superstructure. Their main function is to accommodate deformation caused by temperature changes, loads, and concrete shrinkage and creep, ensuring structural safety and driving comfort. Most existing expansion joints are one-piece structures; see appendix. Figure 1 It includes two main beams (1), main beam anchor bars (2) pre-embedded in the main beams (1), anchoring steel plates (3), anchor bars (4) and slot construction steel bars (11) set at the slot (7), side beams (5) fixed together with the anchoring steel plates (3), expansion joints are formed between the two side beams (5), bridge deck pavement layer (10) is laid at the slot (7), rubber waterstops (9) are set between the two side beams (5), the top of the beam anchor bars (2) is located in the slot (7), and the anchor bars (4) are U-shaped. The slot depth of this type of structure is generally 20cm. When replacing, the entire slot needs to be chiseled out, which is labor-intensive, costly, and may damage the main beam structure. In addition, when replacing, rebar installation is required, which is complex and technically demanding. Repeated replacements are not conducive to the safety of the main beam structure. The anchor ring distribution area of ​​the conventional expansion joint slot is not comprehensive. Some areas are plain concrete, which is easily crushed by heavy vehicles, affecting driving safety. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a split-type bridge expansion joint that is easy to replace, shortens the replacement construction time, and reduces the replacement cost.

[0004] The technical solution of this utility model is as follows: a replaceable split-type bridge expansion joint includes two main beams, main beam anchor bars pre-embedded in the main beams, anchoring steel plates, anchor bars and slot structural steel bars set at the slot, and side beams fixed as one piece with the anchoring steel plates. An expansion joint is formed between the two side beams, and a bridge deck pavement layer is laid at the slot; wherein: multiple anchor bar connecting steel plates are pre-embedded in the main beams, and the anchor bar connecting steel plates are located directly below the slot. The anchor bar is L-shaped, with one end fixed to the side beam and the other end fixed to the anchor bar connecting steel plate. The top surface of the anchor bar connecting steel plate is fixed to the bottom surface of the anchoring steel plate. The height of the slot is the same as the height of the bridge deck pavement layer.

[0005] To ensure the stability of the anchor bar connection, in the above scheme, the other end of the anchor bar passes through the anchor bar connecting steel plate and is welded to it or bolted to it.

[0006] To ensure the stability of the connection between the anchor bar connecting steel plates, the above scheme further includes: the bottom plate surface of the anchor bar connecting steel plate is welded to the main beam anchor bar as a whole or bolted to it as a whole.

[0007] To prevent debris from falling into the expansion joint and affecting its usability, the above solution further includes: a rubber waterstop installation groove is provided on the outer wall of the side beam, and rubber waterstops are installed in the rubber waterstop installation grooves of both side beams.

[0008] Due to its structure, this invention shortens the replacement construction time and reduces replacement costs. Specifically, every two anchor bars share a single anchor bar connecting steel plate, and multiple anchor bar connecting steel plates are distributed on the main beams on both sides of the expansion joint. Local damage only requires local replacement, eliminating the need for complete removal of the entire groove, thus shortening the replacement construction time and reducing replacement costs. Attached Figure Description

[0009] A brief explanation of the contents of each figure in the instruction manual and the markings in the figures is provided: Figure 1 This is a structural schematic diagram of an existing bridge expansion joint; Figure 2 This is a structural schematic diagram of an embodiment of the welding of anchor bars and anchor bar connecting steel plates according to this utility model; Figure 3 This is a structural schematic diagram of an embodiment of the anchor bar and anchor bar connecting steel plate bolt connection of this utility model; Figure 4 This is a schematic diagram of the structure of the present invention when viewed from above without the paved bridge deck layer.

[0010] In the diagram: 1. Main beam; 2. Main beam anchor bar; 3. Anchoring steel plate; 4. Anchor bar; 5. Side beam; 6. Anchor bar connecting steel plate; 7. Groove; 8. Rubber waterstop installation groove; 9. Rubber waterstop; 10. Bridge deck pavement layer; 11. Groove structural reinforcement. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings, providing a non-limiting embodiment. However, it should be understood that these descriptions are merely illustrative and not intended to limit the scope of the present invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0012] In the description of this utility model, it should be understood that the use of terms such as "center," "vertical," "horizontal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, is merely for the convenience of describing this utility model and simplifying the description, and does 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, it should not be construed as a limitation of this utility model. Furthermore, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0013] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0014] like Figures 2 to 4 As shown, a replaceable split-type bridge expansion joint includes two main beams 1, main beam anchor bars 2 pre-embedded in the main beams 1, anchoring steel plates 3, anchor bars 4 and slot structural steel bars 11 set at the slot 7, and side beams 5 fixed to the anchoring steel plates 3 as one piece. An expansion joint is formed between the two side beams 5, and a bridge deck pavement layer 10 is laid at the slot 7; wherein: multiple anchor bar connecting steel plates 6 are pre-embedded in the main beams 1, and the anchor bar connecting steel plates 6 are located directly below the slot 7; The anchor bar 4 is L-shaped. One end of the anchor bar 4 is fixed to the side beam 5 as a whole, and the other end of the anchor bar 4 is fixed to the anchor bar connecting steel plate 6 as a whole. The top surface of the anchor bar connecting steel plate 6 is fixed to the bottom surface of the anchoring steel plate 3 as a whole. The height of the slot 7 is consistent with the height of the bridge deck pavement layer 10. In specific implementation, the slot construction steel bars 11 are multiple and bundled together with the anchor bars 4. In this embodiment, every two anchor bars 4 share an anchor bar connecting steel plate 6, and the anchor bar connecting steel plates 6 are multiple and distributed on the main beams 1 on both sides of the expansion joint. They are small in size, making it easy for construction personnel to position and install them, and control the construction accuracy. The anchor bars 4, the side beams 5, and the anchor bar connecting steel plates 6 form a rigid skeleton, meeting the stress requirements of the expansion joint slot and improving the overall performance of the slot. The anchor bars 4 are L-shaped, requiring less material compared to existing anchor rings. The concrete base surface of the beam 1 is retained above each anchor bar connecting steel plate 6, which can ensure a good connection with the concrete of the bridge deck pavement layer 10 at the slot 7 of the upper expansion joint, while saving project investment.

[0015] To ensure the stability of the anchor bar 4 connection, in the above embodiment, preferably, the other end of the anchor bar 4 passes through the anchor bar connecting steel plate 6 and is welded to it or bolted to it.

[0016] To ensure the stability of the connection of the anchor bar connecting steel plate 6, in the above embodiment, preferably, the bottom plate surface of the anchor bar connecting steel plate 6 is welded to the main beam anchor bar 2 as a whole or bolted together.

[0017] To prevent debris from falling into the expansion joint and affecting its usability, in the above embodiment, preferably, a rubber waterstop installation groove 8 is provided on the outer side wall of the side beam 5, and a rubber waterstop 9 is provided in the rubber waterstop installation groove 8 of both side beams 5.

[0018] All components in the above embodiments are commercially available products.

[0019] The replacement process for the easily replaceable split-type bridge expansion joint described in the above embodiment is as follows: First, the damaged concrete at the groove 7 and the damaged area at the bridge deck pavement layer 10 are removed; then, the anchor bars 4 at the damaged location of the groove 7 are cut, and new anchor bars 4 are re-welded. These new anchor bars 4 are then welded to the anchor bar connecting steel plate 6 and the side beam 5; finally, the damaged areas at the groove 7 and the damaged areas at the bridge deck pavement layer 10 are recast to form the entire split-type bridge expansion joint, completing the replacement. The entire process only requires localized replacement, eliminating the need for complete groove removal, thus shortening the replacement construction time and reducing replacement costs.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A replaceable split-type bridge expansion joint, comprising two main beams (1), main beam anchor bars (2) pre-embedded in the main beams (1), anchoring steel plates (3), anchor bars (4), and slot structural steel bars (11) set at the slot (7), and side beams (5) fixed integrally with the anchoring steel plates (3), forming an expansion joint between the two side beams (5), and a bridge deck pavement layer (10) paved at the slot (7); characterized in that: The main beam (1) has multiple anchor bar connecting steel plates (6) pre-embedded in it, and the anchor bar connecting steel plates (6) are located directly below the groove (7); The anchor bar (4) is L-shaped. One end of the anchor bar (4) is fixed to the side beam (5) as a whole, and the other end of the anchor bar (4) is fixed to the anchor bar connecting steel plate (6) as a whole. The top surface of the anchor bar connecting steel plate (6) is fixed to the bottom surface of the anchoring steel plate (3) as a whole. The height of the slot (7) is the same as the height of the bridge deck pavement layer (10).

2. The easily replaceable split-type bridge expansion joint as described in claim 1, characterized in that: The other end of the anchor bar (4) passes through the anchor bar connecting steel plate (6) and is welded to it as a whole.

3. The easily replaceable split-type bridge expansion joint as described in claim 1 or 2, characterized in that: The bottom plate of the anchor bar connecting steel plate (6) is welded to the anchor bar of the main beam (2) or bolted together.

4. The easily replaceable split-type bridge expansion joint as described in claim 1, characterized in that: A rubber waterstop installation groove (8) is provided on the outer side wall of the side beam (5), and a rubber waterstop (9) is provided in the rubber waterstop installation groove (8) of the two side beams (5).

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