A semi-rigid connecting structure suitable for assembly type beam bridge widening

Abstract

The utility model discloses a half rigid connecting structure suitable for assembly type beam bridge splicing width, include: prefabricated steel structure connecting piece, the upper edge and the side edge of the splicing surface new bridge beam board and the upper edge and the side edge of old bridge beam board are provided with first angle steel and second angle steel respectively, prefabricated steel structure connecting piece is placed in the joint between new bridge beam board and old bridge beam board, and the both sides end face is through the anchoring spare first angle steel and second angle steel and new bridge beam board, old bridge beam board anchoring connection are arranged, and deck pavement layer, it includes the concrete layer, waterproof layer and pitch layer that are laid in the prefabricated steel structure connecting piece top in proper order, the utility model discloses prefabricated steel structure connecting piece is through anchoring connection angle steel on the opposite side of new and old bridge beam board splicing, and utilizes angle steel design and is fixed at the upper edge and the side edge of new bridge beam board and old bridge beam board, increases the anchoring place and the distance between steel strand bellows, reduces the risk of damaging steel strand bellows while reducing the work of detecting bellows position.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a semi-rigid connection structure suitable for widening prefabricated beam bridges. Background Technology

[0002] With the continuous development of transportation, improving the traffic capacity of existing bridges has become increasingly crucial. Cross-section widening, as an important means to achieve this goal, focuses on widening and upgrading bridges—effectively connecting old and new bridges through the application of various technologies at bridge joints, thereby achieving the effect of bridge widening.

[0003] Chinese patent CN202420168301.4 discloses a bridge widening connection structure. This technical solution involves laying rubber pads on the beam slab, with galvanized steel plates inserted through the rubber pads and reinforced with rebar for fixation. However, since this solution involves reinforcing the outer side of the side slab of an old bridge, the location of the prestressed steel strands in the old bridge needs to be accurately determined during the rebar installation process, which presents certain difficulties in detection and the risk of damaging the corrugated steel strand pipes. Utility Model Content

[0004] In order to achieve the connection of prefabricated beam bridge widening while avoiding damage to the steel strand corrugated pipe and reducing construction difficulty, this utility model provides a semi-rigid connection structure suitable for prefabricated beam bridge widening.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A semi-rigid connection structure suitable for widening prefabricated beam bridges includes: a prefabricated steel structure connector, wherein the upper edge and side edge of the new bridge slab and the upper edge and side edge of the old bridge slab on the splicing surface are respectively provided with a first angle steel and a second angle steel, the prefabricated steel structure connector is placed in the joint between the new bridge slab and the old bridge slab, and its two end faces are respectively anchored to the new bridge slab and the old bridge slab through the first angle steel and the second angle steel, and its upper surface is evenly provided with a number of shear studs; The bridge deck pavement includes a concrete layer, a waterproof layer, and an asphalt layer laid sequentially above the precast steel structure connectors; the bridge deck pavement completely covers the horizontal portions of the first and second angle steels and several shear studs.

[0006] As an improvement, the first angle steel is pre-embedded on the upper edge and side edge of the new bridge deck and is partially exposed. The first angle steel has a first connection hole adapted to the anchor at least on its vertical part.

[0007] As an improvement, the second angle steel is anchored to the upper and side edges of the old bridge deck.

[0008] As an improvement, the upper and side edges of the old bridge deck are ground smooth and then the second angle steel is pasted on, and anchored to the old bridge deck with anchors.

[0009] As an improvement, the horizontal and vertical portions of the second angle steel are anchored to the upper and side edges of the old bridge deck, respectively.

[0010] As an improvement, the prefabricated steel structure connector includes an I-beam plate, with a connecting plate provided on each of the two end faces of the I-beam plate. The connecting plate has a second connecting hole, which is positioned corresponding to the first connecting hole on the vertical part of the first angle steel or the second angle steel.

[0011] As an improvement, the I-beam plate and the connecting plate are connected by welding.

[0012] As an improvement, the connecting plate has the following external dimensions: it completely covers the end face of the I-beam plate in both the horizontal and vertical directions, and it fits tightly against the first angle steel or the second angle steel.

[0013] As an improvement, the connecting plate has the same external dimensions as the vertical portion of the first or second angle steel, and at least its upper end is higher than the upper surface of the I-beam plate.

[0014] As an improvement, the thickness of the first angle steel and the second angle steel is 10-14mm, and the pre-embedded depth of the first angle steel is not less than 5mm; the thickness of the connecting plate (12) is 8-10mm.

[0015] Compared with the prior art, this utility model has the following advantages: (1) This utility model uses prefabricated steel structure connectors to anchor angle steel on the opposite side of the splicing of the new bridge deck and the old bridge deck, and uses angle steel design to fix it at the upper edge and side edge of the new bridge deck and the old bridge deck, increasing the distance between the anchor point and the steel strand corrugated pipe, which can reduce the work of detecting the position of the corrugated pipe, reduce the construction difficulty, and reduce the risk of damaging the steel strand corrugated pipe. (2) After grinding the upper and side edges of the old bridge deck to smooth, the second angle steel is pasted and anchored to the old bridge deck with anchors. For the new bridge deck, the first angle steel is pre-embedded on its upper and side edges and partially exposed during the prefabrication process. Different methods are used to securely fix the angle steel on the old and new bridge decks, thereby improving the efficiency of on-site construction. (3) This utility model adopts a prefabricated steel structure connector with welded connecting plates at both ends of an I-beam. The two ends are connected to the new bridge deck and the old bridge deck by passing through the first angle steel and the second angle steel through anchors. After the surface is laid with steel bars, concrete pavement is poured to completely cover the horizontal part of the first angle steel and the second angle steel as well as several shear nails. The prefabricated steel structure connector and reinforced concrete form a semi-rigid structure, so that the widened old bridge has sufficient rigidity and strong adaptability to differential deformation. The additional stress at the joint is reduced and the structural durability is improved.

[0016] In summary, this utility model uses prefabricated steel structure connections, which are easy to assemble and have a shorter curing period compared to concrete structures, reducing bridge construction time and facilitating the rapid commissioning of bridges. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the anchorage of the connecting plate of this utility model; Figure 3 This is a schematic diagram showing the positions of the first and second connecting holes of this utility model; Explanation of reference numerals in the attached figures: 1. Precast steel structure connectors; 11. I-beams; 12. Connecting plates; 121. Second connecting hole; 2. New bridge deck; 21. First angle steel; 211. First connecting hole; 3. Old bridge deck; 31. Second angle steel; 4. Anchors; 5. Shear studs; 6. Bridge deck pavement layer; 61. Concrete layer; 62. Waterproof layer; 63. Asphalt layer; Detailed Implementation 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used 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, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Example 1 like Figure 1 As shown, this utility model provides a semi-rigid connection structure suitable for widening prefabricated beam bridges, comprising: The precast steel structure connector 1 has a first angle steel 21 and a second angle steel 31 respectively installed on the upper and side edges of the new bridge deck 2 and the upper and side edges of the old bridge deck 3 on the splicing surface. The precast steel structure connector 1 is placed in the joint between the new bridge deck 2 and the old bridge deck 3. Its two end faces are anchored to the new bridge deck 2 and the old bridge deck 3 respectively through the first angle steel 21 and the second angle steel 31 inserted through anchors 4. A number of shear studs 5 are evenly distributed on its upper surface; and The bridge deck pavement layer 6 includes a concrete layer 61, a waterproof layer 62, and an asphalt layer 63 laid sequentially above the precast steel structure connector 1; the bridge deck pavement layer 6 completely covers the horizontal portions of the first angle steel 21 and the second angle steel 31 and a number of shear studs 5.

[0021] Preferably, the first angle steel 21 is embedded in the upper edge and side edge of the new bridge deck 2 and is partially exposed. The first angle steel 21 has a first connecting hole 211 adapted to the anchor 4 on at least its vertical part. Preferably, the first angle steel 21 and the new bridge deck 2 are integrally cast and precast.

[0022] Preferably, the second angle steel 31 has first connecting holes 211 adapted to the anchor 4 on its horizontal and vertical portions. After the upper and side edges of the old bridge deck 3 are ground flat, the second angle steel 31 is pasted on, so that the second angle steel 31 is more tightly attached to the upper and side edges of the old bridge deck 3, avoiding the problem of hollowing and uneven force during pasting due to gaps, thereby ensuring the strength and stability of the connection between the two. After pasting, the horizontal and vertical portions are anchored to the upper and side edges of the old bridge deck 3 respectively with the anchor 4 to improve the anchoring position, control the height of the transversely connected steel, increase the distance between the anchoring point and the steel strand corrugated pipe, and prevent damage to the steel strand corrugated pipe.

[0023] Preferably, the prefabricated steel structure connector 1 includes an I-beam plate 11. The I-shaped cross-section concentrates the material in the upper and lower flanges and the middle web, which not only ensures a large moment of inertia and section modulus, but also effectively distributes the load, thus giving full play to the strength of rigid materials compared with ordinary steel. A connecting plate 12 is provided on each of the two end faces of the I-beam plate 11. The I-beam plate 11 and the connecting plate 12 are connected by welding to enhance the overall rigidity. A second connecting hole 121 is provided on the connecting plate 12, which is corresponding to the position of the first connecting hole 211 provided on the vertical part of the first angle steel 21 or the second angle steel 31 to ensure the connection accuracy. More specifically, the anchor 4 passes through the second connecting hole 121 and the first connecting hole 211 in sequence to fix the I-beam plate 11 to the new bridge deck 2 and the old bridge deck 3 respectively.

[0024] Preferably, the external dimensions of the connecting plate 12 are such that it completely covers the end face of the I-beam plate 11 in both the horizontal and vertical directions, and is closely fitted with the first angle steel 21 or the second angle steel 31 to improve the anchoring connection strength and reliability.

[0025] It is worth noting that the external dimensions of the connecting plate 12 are the same as the vertical part of the first angle steel 21 or the second angle steel 31, and at least its upper end is higher than the upper end face of the I-beam plate 11. When pouring concrete, it can further stabilize the connection between the precast steel structure connector 1 and the first angle steel 21 and the second angle steel 31.

[0026] Preferably, the thickness of the first angle steel 21 and the second angle steel 31 is 10-14mm, and the pre-embedded depth of the first angle steel 21 is not less than 5mm; the thickness of the connecting plate 12 is 8-10mm.

[0027] Preferably, a number of semi-rigid connection structures are arranged longitudinally at intervals within the joint between the new bridge deck 2 and the old bridge deck 3, with a preferred interval of 50cm.

[0028] Example 2 like Figure 1As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows: In this embodiment, the upper surface of the prefabricated steel structure connector 1 is provided with a number of evenly distributed shear studs 5. The shear studs 5 are fixed to the upper surface of the I-beam plate 11 by welding and then embedded in the concrete layer 61 to form a semi-rigid connection structure. This structure can effectively transfer the shear force at the interface of the two materials, prevent relative slippage, and ensure that the connector and the concrete layer 61 share the load, giving full play to the mechanical properties of rigid materials and concrete materials.

[0029] It is worth noting that the bridge deck pavement layer 6 includes a concrete layer 61, a waterproof layer 62, and an asphalt layer 63 laid sequentially on the connector, realizing the functions of the concrete layer 61 bearing load, the waterproof layer 62 providing protection, and the asphalt layer 63 protecting the surface, thus providing comprehensive protection for the bridge deck pavement layer 6.

[0030] To facilitate a better understanding of the features of this plan, the construction method, sequence, and procedure are as follows: (1) First, according to the design location, remove the concrete surface of the widened part of the old bridge slab 3, remove the accumulated water and scum, grind the upper edge and side edge of the old bridge slab 3 flat, attach the second angle steel 31 to the upper edge and side edge of the old bridge slab 3, and anchor it to the upper edge and side edge of the old bridge slab 3 with anchor 4. (2) The prefabricated steel structure connector 1 is fixedly connected to the first angle steel 21 and the second angle steel 31 on the new bridge deck 2 and the old bridge deck 3 respectively using anchors 4; (4) Several semi-rigid connection structures are arranged longitudinally at intervals in the joint between the new bridge deck 2 and the old bridge deck 3, with a preferred interval of 50cm. (5) Finally, concrete layer 61, waterproof layer 62 and asphalt layer 63 are poured on the bridge deck in sequence, and cured after pouring.

[0031] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A semi-rigid connection structure suitable for widening prefabricated beam bridges, characterized in that, include: The precast steel structure connector has a first angle steel and a second angle steel respectively installed on the upper and side edges of the new bridge deck and the upper and side edges of the old bridge deck on the splicing surface. The precast steel structure connector is placed in the joint between the new and old bridge decks. Its two end faces are anchored to the new and old bridge decks respectively through the first and second angle steels. A number of shear studs are evenly distributed on its upper surface. The bridge deck pavement layer includes a concrete layer, a waterproof layer, and an asphalt layer laid sequentially on top of the precast steel structure connectors; the bridge deck pavement layer completely covers the horizontal portions of the first angle steel and the second angle steel, as well as several shear studs.

2. The semi-rigid connection structure for widening prefabricated beam bridges according to claim 1, characterized in that, The first angle steel is embedded in the upper edge and side edge of the new bridge deck and is partially exposed. The first angle steel has a first connection hole adapted to the anchor at least on its vertical part.

3. A semi-rigid connection structure suitable for widening prefabricated beam bridges according to claim 1, characterized in that, The second angle steel is anchored to the upper and side edges of the old bridge deck.

4. A semi-rigid connection structure suitable for widening prefabricated beam bridges according to claim 3, characterized in that, After the upper and side edges of the old bridge deck are ground smooth, the second angle steel is pasted on and anchored to the old bridge deck with anchors.

5. A semi-rigid connection structure suitable for widening prefabricated beam bridges according to claim 4, characterized in that, The horizontal and vertical portions of the second angle steel are respectively anchored to the upper and side edges of the old bridge deck.

6. A semi-rigid connection structure suitable for widening prefabricated beam bridges according to claim 1, characterized in that, The prefabricated steel structure connector includes an I-beam plate, with a connecting plate on each of the two end faces of the I-beam plate. The connecting plate has a second connecting hole, which is positioned corresponding to the first connecting hole on the vertical part of the first angle steel or the second angle steel.

7. A semi-rigid connection structure suitable for widening prefabricated beam bridges according to claim 6, characterized in that, The I-beam plate and the connecting plate are connected by welding.

8. A semi-rigid connection structure suitable for widening prefabricated beam bridges according to claim 6, characterized in that, The connecting plate has the following dimensions: it completely covers the end face of the I-beam plate in both the horizontal and vertical directions, and it fits tightly against the first angle steel or the second angle steel.

9. A semi-rigid connection structure suitable for widening prefabricated beam bridges according to claim 8, characterized in that, The connecting plate has the same external dimensions as the vertical portion of the first or second angle steel, and at least its upper end is higher than the upper surface of the I-beam plate.

10. A semi-rigid connection structure suitable for widening prefabricated beam bridges according to claim 6, characterized in that, The thickness of the first angle steel and the second angle steel is 10-14mm, and the pre-embedded depth of the first angle steel is not less than 5mm; the thickness of the connecting plate is 8-10mm.

Images