A high-strength connecting device for a steel-concrete composite bridge deck

Abstract

The utility model discloses a kind of high-strength connecting devices for steel-concrete composite bridge deck, including steel box girder main body and the concrete layer being poured above the steel box girder main body, the steel box girder main body is connected with concrete layer between being provided with for reinforcing bearing seat;The beneficial effects of the utility model are: through the annular wing plate of shear sleeve, grouting through-hole, with the large-area contact of wing plate and concrete and the filling of through-hole by concrete, realize the multiple-path transmission of shear force, greatly improve the shear bearing capacity, anchor plate, reinforcing rib plate, reinforcing rib net and inverted conical taper groove synergistically enhance tensile property, effectively solve the problem that traditional bolt pullout is poor and concrete is easy to crack, force transmission is more efficient, structural stability is significantly improved, shear sleeve wing plate is welded to form a whole, assembly is accurately positioned through limiting ring groove and clamping groove, wing plate circular arc transition structure avoids stress concentration, improves the integrity and durability of connection, prolongs bridge life.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, specifically a high-strength connection device for steel-concrete composite bridge decks. Background Technology

[0002] Steel-concrete composite bridge decks combine the high strength and toughness of steel with the high stiffness and durability of concrete, and are widely used in long-span bridge projects. The connection performance between the steel deck and the concrete deck directly affects the overall stress performance and service life of the composite bridge deck. Traditional steel-concrete composite box girder joints often use studs for connection, with a steel cage laid on top of the steel box girder and the concrete bridge deck poured to form a whole. This connection method cannot effectively resist the shear force generated by external loads, and the cohesion of the joint is poor. The studs have poor pull-out resistance, resulting in poor overall performance of the steel-concrete composite box girder. Furthermore, the concrete at the joint between the studs and the concrete is prone to cracking, which is detrimental to the durability of the bridge structure. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a high-strength connection device for steel-concrete composite bridge decks. Through the annular wing plate and grouting through-holes of the shear sleeve, and by utilizing the large-area contact between the wing plate and concrete, as well as the filling of the through-holes by the concrete, multi-path transmission of shear force is achieved, significantly improving shear bearing capacity. Anchor plates, reinforcing plates, reinforcing mesh, and inverted conical grooves synergistically enhance tensile performance, effectively solving the problems of pull-out differential and easy cracking of concrete associated with traditional studs. This makes force transmission more efficient, significantly improving structural stability. The shear sleeve wing plates are welded together to form a whole, and the components are precisely positioned via limiting annular grooves and slots. The circular arc transition structure of the wing plates avoids stress concentration, improving the overall integrity and durability of the connection, extending the bridge's lifespan, and solving the aforementioned problems.

[0004] (II) Technical Solution To achieve the above objectives, this utility model is implemented through the following technical solution: a high-strength connection device for steel-concrete composite bridge deck, comprising a steel box girder body and a concrete layer poured on top of the steel box girder body; A support seat for reinforcement connection is provided between the main body of the steel box girder and the concrete layer. The support seat is a rectangular steel plate structure. The lower surface of the support seat is welded and fixed to the upper surface of the steel panel of the main body of the steel box girder. The upper surface of the support seat is provided with a limiting ring groove. The surface of the receiving seat is provided with a plurality of shear sleeves, which are arranged in a matrix and are evenly distributed on the surface of the receiving seat. The shear sleeves are detachably inserted into the limiting ring grooves provided on the surface of the receiving seat. Each of the shear sleeves is provided with a reinforcing anchor bolt, and one end of the reinforcing anchor bolt that penetrates the shear sleeve is welded to the surface of the bearing seat.

[0005] Preferably, a conical groove for accommodating concrete is provided at the contact point between the receiving seat and the reinforcing anchor bolt, and the conical groove has an inverted conical structure.

[0006] Preferably, the surface of the shear sleeve is evenly distributed with multiple wing plates in a ring shape, and the surface of the receiving seat is provided with a groove that matches the wing plates, and the groove communicates with the limiting ring groove.

[0007] Preferably, the two adjacent flanges on the two shear sleeves are fixed together by welding.

[0008] Preferably, the top ends of several of the reinforcing anchor bolts are welded to the same anchor plate, and the surface of the anchor plate is welded with reinforcing ribs, and the several reinforcing ribs are evenly distributed and welded to the inner side of the corners of the anchor plate.

[0009] Preferably, the surface of the anchor plate is fitted with a reinforcing mesh.

[0010] Preferably, the surface of the shear sleeve is provided with a plurality of grouting through holes evenly distributed in a ring shape.

[0011] Preferably, the contact portion between the wing plate and the shear sleeve is provided with an arc transition structure, and the thickness of the wing plate flange gradually increases from its end toward the axis of the shear sleeve.

[0012] (III) Beneficial Effects This invention provides a high-strength connection device for steel-concrete composite bridge decks. It offers the following advantages: the annular wing plate of the shear sleeve and the grouting through-holes significantly enhance shear bearing capacity; the large-area contact between the wing plate and concrete, and the filling of the grouting through-holes by the concrete, allow shear force to be transmitted through multiple paths; simultaneously, the anchor plate, reinforcing plate, reinforcing mesh, and inverted conical groove work synergistically to significantly enhance tensile performance. This effectively solves the problems of pull-out differential and easy cracking of concrete associated with traditional studs, making the force transmission of the steel-concrete composite bridge deck more efficient when bearing external loads, and greatly improving the overall structural stability. In this device, the shear sleeve flanges are welded to form an integral structure, and the components are precisely positioned by limiting ring grooves and slots, ensuring the integrity of the connection. The tight bonding between the shear sleeve and the concrete, as well as the arc transition structure of the flanges, avoid stress concentration, effectively preventing concrete cracking and component fatigue damage, greatly improving the durability of the connection device, and thus extending the overall service life of the bridge. The device's support base, shear sleeve, and anchoring structure are easy to assemble. Each component is precisely positioned and works together to bear the load. The gradually varying thickness of the flange during shear resistance and the stress-dispersing effect of the reinforcing mesh during tension resistance make the load distribution more uniform and reduce the risk of localized damage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure between the concrete layer and the main body of the steel box girder in this utility model; Figure 3 This is a schematic diagram of the structure of the middle wing plate, shear sleeve, and grouting through hole of this utility model; Figure 4 This is a schematic diagram of the structure of the anchor plate, reinforcing mesh, and reinforcing plate in this utility model; Figure 5 This is a schematic diagram of the structure of the bearing seat, wing plate and shear sleeve in this utility model; Figure 6 In this utility model Figure 2 Enlarged structural diagram at point A in the diagram Explanation of reference numerals in the attached drawings: 1. Main body of steel box girder; 2. Concrete layer; 3. Support seat; 4. Limiting ring groove; 5. Reinforcing anchor bolt; 6. Conical groove; 7. Slot; 8. Shear sleeve; 9. Wing plate; 10. Grouting through hole; 12. Anchor plate; 13. Reinforcing rib plate; 14. Reinforcing mesh. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-6 This utility model provides a technical solution for a high-strength connection device for steel-concrete composite bridge deck: a high-strength connection device for steel-concrete composite bridge deck includes a steel box girder body 1 and a concrete layer 2 poured on top of the steel box girder body 1; A support seat 3 for reinforcement connection is provided between the main body 1 of the steel box girder and the concrete layer 2. The support seat 3 is a rectangular steel plate structure. The lower surface of the support seat 3 is welded and fixed to the upper surface of the steel plate of the main body 1 of the steel box girder. The upper surface of the support seat 3 is provided with a limiting ring groove 4. The surface of the receiving seat 3 is provided with a plurality of shear sleeves 8, which are arranged in a matrix and are evenly distributed on the surface of the receiving seat 3. The shear sleeves 8 are detachably inserted into the limiting ring grooves 4 provided on the surface of the receiving seat 3. Each of the multiple shear sleeves 8 is equipped with a reinforcing anchor bolt 5, and one end of the reinforcing anchor bolt 5 that penetrates the shear sleeve 8 is welded to the surface of the bearing seat 3.

[0016] By setting the support seat 3 as the connection carrier between the main body 1 of the steel box girder and the concrete layer 2, the lower surface of the support seat 3 is welded and fixed to the main body 1 of the steel box girder, ensuring the basic stability of the connection. The limiting ring groove 4 radially positions the shear sleeves 8 that are evenly distributed in a matrix, ensuring the accurate installation position of the shear sleeves 8. The reinforcing anchor bolt 5 penetrates the shear sleeve 8 and is welded to the support seat 3, forming a force transmission path from the main body 1 of the steel box girder to the concrete layer 2. When the steel-concrete composite bridge deck is subjected to load, the force can be effectively transmitted through these components, improving the overall connection strength and laying the structural foundation for the subsequent realization of shear and tensile performance.

[0017] Furthermore, a conical groove 6 for accommodating concrete is provided at the contact point between the receiving seat 3 and the reinforcing anchor bolt 5. The conical groove 6 has an inverted conical structure.

[0018] The inverted conical groove 6 opened at the contact point between the receiving seat 3 and the reinforcing anchor 5 can accommodate concrete during concrete pouring. The inverted conical structure utilizes the bond force of concrete to enhance the tensile connection performance between the reinforcing anchor 5, the receiving seat 3, and the concrete layer 2, effectively preventing the reinforcing anchor 5 from relatively separating from the receiving seat 3 or the concrete layer 2 when under tension, thereby improving the tensile bearing capacity of the connection device.

[0019] Furthermore, the surface of the shear sleeve 8 is evenly distributed with multiple wing plates 9 in a ring shape, and the surface of the receiving seat 3 is provided with a slot 7 that matches the wing plate 9. The slot 7 is connected to the limiting ring groove 4.

[0020] The annularly distributed flanges 9 on the surface of the shear sleeve 8 increase the contact area with the concrete layer 2. When shear force is generated between the steel and concrete structures, the flanges 9 can provide greater shear resistance. The grooves 7 on the surface of the receiving seat 3 that are adapted to the flanges 9 are connected to the limiting ring grooves 4, which not only restrict the circumferential rotation of the shear sleeve 8, but also further position it, ensuring the structural stability of the shear sleeve 8 when subjected to shear force, so that the shear performance can be stably exerted.

[0021] Furthermore, the two wing plates 9 on the two shear sleeves 8 that are close to each other are fixed together by welding.

[0022] The flanges 9 on the two shear sleeves 8 are fixed together by welding, so that the multiple shear sleeves 8 form a whole structure that works together to bear the load. When subjected to shear load, the multiple shear sleeves 8 can resist the shear force together, avoiding damage to a single shear sleeve 8 due to excessive force, and improving the overall shear bearing capacity and structural stability of the shear sleeves 8.

[0023] Furthermore, the top of several reinforcing anchor bolts 5 is welded with the same anchor plate 12, and the surface of the anchor plate 12 is welded with reinforcing ribs 13. Several reinforcing ribs 13 are evenly distributed and welded to the inner side of the corner of the anchor plate 12.

[0024] The same anchor plate 12 welded to the top of several reinforcing anchor bolts 5, and the reinforcing ribs 13 welded evenly on the inner side of the corner of the anchor plate 12, greatly increase the contact area and connection firmness with the concrete layer 2, and further improve the stability after connection.

[0025] Furthermore, a reinforcing mesh 14 is installed on the surface of the anchor plate 12.

[0026] The reinforcing mesh 14 installed on the surface of the anchor plate 12 further increases the contact area with the concrete layer 2 and the overall structural integrity. The reinforcing mesh 14 can disperse stress, so that the tensile force is transmitted to the concrete layer 2 more evenly, which improves the connection strength between the anchor plate 12 and the concrete layer 2 and enhances the tensile stability and durability of the connection device.

[0027] Furthermore, the surface of the shear sleeve 8 is provided with multiple grouting through holes 10 evenly distributed in a ring shape.

[0028] Multiple grouting through holes 10 are evenly distributed in a ring on the surface of the shear sleeve 8, allowing concrete to fill into the interior and periphery of the shear sleeve 8. This enhances the bond between the shear sleeve 8 and the concrete layer 2. Under shear loads, the concrete and the shear sleeve 8 can work together to resist shear forces, improving the shear bearing capacity of the shear sleeve 8 and also enhancing the durability of the connection between the shear sleeve 8 and the concrete layer 2.

[0029] Furthermore, the contact portion between the wing plate 9 and the shear sleeve 8 is provided with an arc transition structure, and the thickness of the flange of the wing plate 9 gradually increases from its end toward the axis of the shear sleeve 8.

[0030] The rounded transition structure at the contact point between the flange 9 and the shear sleeve 8 avoids stress concentration, preventing cracks or damage at the connection point due to stress concentration. The design of the flange thickness of the flange 9 gradually increasing from its end towards the axis of the shear sleeve 8 optimizes the stress performance while ensuring shear strength, allowing the force to be transmitted more evenly when the flange 9 is subjected to shear force, thus improving the shear durability and structural stability of the flange 9.

[0031] The working principle of this utility model is as follows: The support seat 3 is a rectangular steel plate structure, and its lower surface is welded and fixed to the upper surface of the steel panel of the main body of the steel box girder 1. As the basic load-bearing component of the entire connection device, it transmits the connection force of the steel and concrete structure to the main body of the steel box girder 1. The limiting ring groove 4 provided on its upper surface is used to radially position the shear sleeve 8 to be installed later, so as to ensure the accuracy of the installation position of the shear sleeve 8. The shear sleeve 8 is detachably inserted into the limiting ring groove 4 on the surface of the receiving seat 3. At the same time, the surface of the receiving seat 3 is provided with a slot 7 that is adapted to the wing plate 9 on the surface of the shear sleeve 8. The slot 7 is connected to the limiting ring groove 4. After the wing plate 9 is inserted into the slot 7, it can restrict the circumferential rotation of the shear sleeve 8, realize the multi-directional positioning of the shear sleeve 8 on the receiving seat 3, and the two wing plates 9 on the two shear sleeves 8 that are close to each other are fixed by welding, which further enhances the overall connection between the shear sleeves 8, so that multiple shear sleeves 8 form a whole structure that cooperates in bearing the force. The surface of the shear sleeve 8 is evenly distributed with multiple flanges 9 in a ring. The flanges 9 are in close contact with the concrete layer 2. When a relative shear tendency occurs between the main body 1 of the steel box girder and the concrete layer 2, the flanges 9 can provide greater shear resistance. At the same time, the contact part between the flanges 9 and the shear sleeve 8 is provided with an arc transition structure. The thickness of the flanges 9 gradually increases from their ends towards the axis of the shear sleeve 8. This structural design can avoid stress concentration and optimize the stress performance while ensuring shear strength. In addition, multiple grouting through holes 10 are evenly distributed in a ring on the surface of the shear sleeve 8, which allows concrete to fill into the interior and periphery of the shear sleeve 8, enhances the adhesion between the shear sleeve 8 and the concrete layer 2, and further improves the shear resistance. The top of several reinforcing anchor bolts 5 is welded with the same anchor plate 12. The surface of the anchor plate 12 is welded with reinforcing ribs 13. Several reinforcing ribs 13 are evenly distributed and welded to the inner side of the corner of the anchor plate 12. At the same time, the surface of the anchor plate 12 is also equipped with reinforcing mesh 14, which can greatly increase the contact area and connection firmness with the concrete layer 2. When the connection device is subjected to pull-out force, the anchor plate 12, reinforcing ribs 13 and reinforcing mesh 14 can effectively resist the pull-out force through the bonding and mechanical interlocking with the concrete, preventing the connection device from coming out of the concrete layer 2. In addition, the inverted conical groove 6 opened at the contact point between the bearing seat 3 and the reinforcing anchor bolt 5 can be filled with concrete during concrete pouring. The inverted conical shape of the groove 6 further enhances the tensile connection performance between the reinforcing anchor bolt 5, the bearing seat 3 and the concrete layer 2. When the steel-concrete composite bridge deck is under load, the shear force between the main body 1 of the steel box girder and the concrete layer 2 is transmitted and resisted through the bonding between the shear sleeve 8's flange 9, the grouting through hole 10 and the concrete, and the welded structure of the bearing seat 3. The tensile force is borne by the synergistic action of the reinforced anchor bolts 5, the anchor plate 12, the reinforcing rib plate 13 and the reinforcing mesh 14. The positioning structure between each component (such as the limiting ring groove 4 and the slot 7) ensures the structural stability under stress and prevents relative displacement between components, so that the entire connection device forms an efficient load-bearing whole and realizes a high-strength and stable connection between the steel-concrete composite bridge decks.

[0032] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0033] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength connection device for steel-concrete composite bridge deck, comprising a steel box girder body (1) and a concrete layer (2) poured on the steel box girder body (1); Its features are: A support seat (3) for reinforcement connection is provided between the main body (1) of the steel box girder and the concrete layer (2). The support seat (3) is a rectangular steel plate structure. The lower surface of the support seat (3) is welded and fixed to the upper surface of the steel plate of the main body (1) of the steel box girder. The upper surface of the support seat (3) is provided with a limiting ring groove (4). The surface of the receiving seat (3) is provided with a plurality of shear sleeves (8), and the plurality of shear sleeves (8) are evenly distributed in a matrix on the surface of the receiving seat (3). The shear sleeves (8) are detachably inserted into the limiting ring grooves (4) provided on the surface of the receiving seat (3). Each of the shear sleeves (8) is provided with a reinforcing anchor bolt (5), and one end of the reinforcing anchor bolt (5) that penetrates the shear sleeve (8) is welded to the surface of the support seat (3).

2. The high-strength connection device for steel-concrete composite bridge decks according to claim 1, characterized in that: The receiving seat (3) has a conical groove (6) for accommodating concrete at the contact point with the reinforcing anchor bolt (5), and the conical groove (6) has an inverted conical structure.

3. A high-strength connection device for steel-concrete composite bridge decks according to claim 1, characterized in that: The surface of the shear sleeve (8) is evenly distributed with multiple wing plates (9) in a ring shape. The surface of the receiving seat (3) is provided with a slot (7) that matches the wing plate (9). The slot (7) is connected to the limiting ring groove (4).

4. A high-strength connection device for steel-concrete composite bridge decks according to claim 3, characterized in that: The two shear sleeves (8) are fixed together by welding.

5. A high-strength connection device for steel-concrete composite bridge decks according to claim 1, characterized in that: The top of several of the reinforcing anchor bolts (5) is welded with the same anchor plate (12), and the surface of the anchor plate (12) is welded with reinforcing ribs (13). Several reinforcing ribs (13) are evenly distributed and welded to the inside of the corner of the anchor plate (12).

6. A high-strength connection device for steel-concrete composite bridge decks according to claim 5, characterized in that: The surface of the anchor plate (12) is fitted with a reinforcing mesh (14).

7. A high-strength connection device for steel-concrete composite bridge decks according to claim 1, characterized in that: The surface of the shear sleeve (8) is provided with a plurality of grouting through holes (10) evenly distributed in a ring shape.

8. A high-strength connection device for steel-concrete composite bridge decks according to claim 4, characterized in that: The contact portion between the wing plate (9) and the shear sleeve (8) is provided with an arc transition structure, and the thickness of the flange of the wing plate (9) gradually increases from its end toward the axis of the shear sleeve (8).

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