Reinforced hollow slab beam

Abstract

The utility model discloses a reinforced hollow slab beam which comprises two hollow slab beam bodies which are connected side by side in a hinge joint mode, and the hinge joint of the two hollow slab beam bodies is filled with a first concrete material layer. U-steel is transversely arranged on the tops of the two hollow slab beam bodies across the hinge joint, the bottom of the U-steel is anchored to the tops of the hollow slab beam bodies through first chemical anchor bolts, and a plurality of connecting steel bars penetrate through wing plates of the U-steel; a second concrete layer is paved on the top of the hollow slab beam body, and the channel steel is located in the second concrete layer; the hollow slab girder further comprises a U-shaped steel plate, extending faces parallel to the bottom face are arranged on the outer sides of the edges of wing plates of the U-shaped steel plate respectively, and the two extending faces are pasted to the bottoms of the two hollow slab girder bodies in a hinge joint crossing mode. And a plurality of gate-type steel bars are implanted in a cavity formed by the U-shaped steel plate and the hollow slab beam body at equal intervals across hinge joints. According to the reinforced hollow slab beam, transverse connection of the reinforced hollow slab beam is reinforced, bending moment and vertical shearing force can be transmitted between the slabs, and stress is more reasonable.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge reinforcement structures and relates to a reinforced hollow plate beam. Background Art

[0002] The engineering community's recognition of the defects of prefabricated hollow slabs is a gradual process. In the early days, more attention was paid to the bearing capacity of hollow slab structures, and more research was focused on reinforcement technology to improve the bearing capacity of single slabs. Prefabricated hollow slab bridges currently account for a high proportion, but there are also many defects. It is not realistic to replace all of them, so it is very meaningful to develop effective reinforcement technology. The traditional hollow slab beam reinforcement structure is limited to the reinforcement of a single beam. The utility model proposes a new reinforcement structure based on the traditional steel-concrete composite beam and steel plate-concrete composite reinforcement. After reinforcement, the transverse connection of the prefabricated hollow slab beam is strengthened, and the transverse stress condition is effectively improved. The plates can transmit both bending moment and vertical shear force, and the stress is more reasonable. Utility Model Content

[0003] The utility model aims to provide a reinforced hollow slab beam, so that the lateral connection of the reinforced hollow slab beam is strengthened, the plates can transmit both bending moment and vertical shear force, and the force is more reasonable.

[0004] The technical scheme adopted by the utility model is that the reinforced hollow slab beam comprises two hollow slab beam bodies connected by a side-by-side hinged seam, the hinged seam of the two hollow slab beam bodies is filled with a first concrete layer; a channel steel is transversely arranged across the hinged seam at the top of the two hollow slab beam bodies, the bottom of the channel steel is anchored to the top of the hollow slab beam body by a first chemical anchor bolt, and a plurality of connecting steel bars are arranged through the wing plate of the channel steel; a second concrete layer is paved on the top of the hollow slab beam body, and the channel steel is located in the second concrete layer; it also comprises a U-shaped steel plate, and the outer sides of the wing plate edges of the U-shaped steel plate are respectively provided with extension surfaces parallel to the bottom surface, and the two extension surfaces are pasted to the bottom of the two hollow slab beam bodies across the hinged seam; a plurality of gate-type steel bars are implanted at equal intervals across the hinged seam in the cavity formed by the U-shaped steel plate and the hollow slab beam body.

[0005] The utility model is also characterized in that:

[0006] The cavity formed by the U-shaped steel plate and the hollow slab beam body is filled with a grouting material layer.

[0007] A plurality of prestressed corrugated pipes are tied with steel wires in the cavity formed by the portal steel bars and the hollow slab beam body, and a plurality of steel strands are tensioned in the prestressed corrugated pipes.

[0008] An adhesive layer is arranged between the bottom of the channel steel and the top of the hollow slab beam body.

[0009] It also includes a second chemical anchor bolt, which penetrates the extension surface and is fixedly connected to the bottom of the hollow slab beam body.

[0010] A number of stiffening ribs are welded to both sides of the lower end face of the U-shaped steel plate, and each stiffening rib is perpendicular to the extension surface and the side face of the lower end face of the U-shaped steel plate.

[0011] A number of welding pins are arranged on the bottom surface of the upper end surface of the U-shaped steel plate.

[0012] An asphalt mixture layer is laid on the second concrete layer.

[0013] The beneficial effects of the utility model are:

[0014] 1. In the reinforced structure of this application, portal steel bars are implanted at equal intervals across the hinge joints in adjacent hollow slab beams, further ensuring the stability of the transverse connection between adjacent hollow slab beams.

[0015] 2. In the reinforced structure of the present application, the arrangement of connecting steel bars penetrating the channel steel wing plate enhances the tensile strength of the second concrete layer, prevents cracking and damage to the second concrete layer, and increases the bearing capacity and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross section of the reinforced hollow slab beam of the utility model;

[0017] Figure 2 It is a schematic diagram of the U-shaped steel plate structure in the reinforced hollow slab beam of the utility model;

[0018] Figure 3 It is a schematic diagram of the channel steel structure in the reinforced hollow slab beam of the utility model;

[0019] Figure 4 It is a schematic diagram of prestressed corrugated tubes and steel strands in the reinforced hollow slab beam of the utility model.

[0020] In the figure, 1. U-shaped steel plate, 101. extension surface, 102. stiffening rib, 103. welding nail, 2. channel steel, 201. first chemical anchor bolt, 202. connecting steel bar, 3. prestressed corrugated pipe, 4. hollow slab beam body, 5. first concrete layer, 6. second concrete layer, 7. asphalt mixture layer, 8. portal steel bar, 9. grouting material layer, 10. second chemical anchor bolt, 11. steel strand. DETAILED DESCRIPTION

[0021] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0022] The utility model reinforced hollow slab beam, such as Figure 1As shown, it includes two hollow slab beam bodies 4 connected by a hinged seam side by side, and the hinged seams of the two hollow slab beam bodies 4 are filled with a first concrete layer 5; a channel steel 2 is transversely arranged across the hinged seam at the top of the two hollow slab beam bodies 4, and the bottom of the channel steel 2 is adhered by an adhesive layer and anchored to the top of the hollow slab beam body 4 by a first chemical anchor bolt 201, and a plurality of connecting steel bars 202 are arranged through the wing plate of the channel steel 2, as shown in FIG. Figure 2 As shown; the top of the hollow slab beam body 4 is paved with a second concrete layer 6, the channel steel 2 is located in the second concrete layer 6, and the second concrete layer 6 is paved with an asphalt mixture layer 7; it also includes a U-shaped steel plate 1, and the outer sides of the wing edges of the U-shaped steel plate 1 are respectively provided with extension surfaces 101 parallel to the bottom surface, as shown Figure 3 As shown, two extension surfaces 101 are pasted to the bottom of two hollow slab beam bodies 4 across the hinged joint and anchored by second chemical anchor bolts 10; a plurality of gate-type steel bars 8 are implanted at equal intervals across the hinged joint in the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4; a plurality of prestressed corrugated pipes 3 are tied with steel wires in the cavity formed by the gate-type steel bars 8 and the hollow slab beam body 4, as shown in FIG. Figure 4 As shown, multiple steel strands 11 are tensioned in the prestressed corrugated pipe 3, and the arrangement of the steel strands 11 increases the longitudinal stress; the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4 is filled with a grouting material layer 9, and the filling of the grouting material layer 9 makes the U-shaped steel plate 1 and the hollow slab beam body 4 become one, thereby enhancing the transverse reinforcement; Figure 3 As shown, a number of stiffening ribs 102 are welded on both sides of the lower end face of the U-shaped steel plate 1. The stiffening ribs 102 are perpendicular to the extension surface 101 and the side faces of the lower end face of the U-shaped steel plate 1. The stiffening ribs are arranged to prevent the U-shaped steel plate 1 from being deformed after being filled with the grouting material layer 9, thereby affecting the lateral reinforcement. A number of welding nails 103 are arranged on the bottom surface of the upper end face of the U-shaped steel plate 1. The arrangement of the welding nails 103 increases the contact area with the grouting material layer 9, thereby preventing the grouting material layer 9 from being separated from the U-shaped steel plate 1.

[0023] Working principle of this utility model:

[0024] The utility model adheres and anchors the U-shaped steel plates 1 at the bottom of the two hollow slab beam bodies 4, implants the gate-type steel bars 8 at equal intervals across the hinged joint, adheres and anchors the channel steels 2 at the top of the hollow slab beam bodies 4, sets the second concrete layer 6 and the asphalt mixture layer 7, and fills the first concrete layer 5 in the hinged joint, all of which are for strengthening the lateral connection between the hollow slab beam bodies 4.

[0025] Reinforcement between the hollow slab beam bodies 4:

[0026] The hinged joint between the two hollow slab beam bodies 4 is filled with a first concrete layer 5 .

[0027] Hollow slab beam body 4 top reinforcement:

[0028] First, the bridge deck pavement layer on the top of the hollow slab beam body 4 is chiseled off and holes are drilled at the anchor bolt positions. The dust in the holes is removed using an air compressor and the holes are cleaned using acetone. Structural adhesive is applied on the top of the hollow slab beam body 4 and across the hinge joint surface. The channel steel 2 is pasted and anchored using the first chemical anchor bolt 201. Weight is applied to make the channel steel 2 and the hollow slab beam body 4 tightly connected. After the strength is reached, the weight is removed and multiple connecting steel bars 202 are set through the wing plate of the channel steel 2. Then the second concrete layer 6 and the asphalt mixture layer 7 are paved in sequence.

[0029] Bottom reinforcement of hollow slab beam body 4:

[0030] The concrete surface at the corresponding position of the bottom of the hollow slab beam body 4 is polished to expose the hard coarse aggregate; a hole is drilled at the corresponding position of the bottom, and the dust in the hole is removed by an air compressor, and the hole is cleaned with acetone; first, a number of gate-type steel bars 8 are implanted every 20 cm across the hinge joint; the U-shaped steel plate 1 is made of steel plate rolled according to the requirements, and the extension surface 101 of the U-shaped steel plate 1 is polished as required, and after the polishing is completed, it is wiped with alcohol to ensure that the extension surface 101 is clean and tidy, and the prepared structural glue is evenly applied to the extension surface 1 01, and then accurately place and paste it, and use the second chemical anchor 10 to anchor it to the bottom of the hollow slab beam body 4; wait for the structural adhesive to solidify, use steel wire to tie a number of prestressed corrugated pipes 3 at the designed position in the cavity formed by the portal steel bar 8 and the hollow slab beam body 4, and after the positioning is completed, pour the stirred high-strength grouting material layer 9 into the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4 through the irrigation mouth at one end; wait for the grouting material layer 9 to be cured for 7 days, and after reaching the design strength, tension a plurality of steel strands 11 in the prestressed corrugated pipe 3.

[0031] Embodiment 1:

[0032] The reinforced hollow slab beam comprises two hollow slab beam bodies 4 connected by a hinged joint side by side, and the hinged joints of the two hollow slab beam bodies 4 are filled with a first concrete layer 5; a channel steel 2 is transversely arranged across the hinged joint at the top of the two hollow slab beam bodies 4, and the bottom of the channel steel 2 is anchored to the beam top of the hollow slab beam body 4 by a first chemical anchor bolt 201, and a plurality of connecting steel bars 202 are arranged through the wing plate of the channel steel 2; a second concrete layer 6 is paved on the top of the hollow slab beam body 4, the channel steel 2 is located in the second concrete layer 6, and asphalt is paved on the second concrete layer 6 Mixed material layer 7; also includes U-shaped steel plate 1, U-shaped steel plate 1 is made of Q345 steel rolled as required, and the outer sides of the wing plate edges of the U-shaped steel plate 1 are respectively provided with extension surfaces 101 parallel to the bottom surface, and the two extension surfaces 101 are pasted to the bottom of the two hollow slab beam bodies 4 across the hinge joint; a number of gate-type steel bars 8 are implanted in the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4 at equal intervals across the hinge joint, and the arrangement is arranged every 20 cm along the longitudinal direction; the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4 is filled with a grouting material layer 9.

[0033] Embodiment 2:

[0034] The reinforced hollow slab beam comprises two hollow slab beam bodies 4 connected by a hinged joint side by side, and the hinged joints of the two hollow slab beam bodies 4 are filled with a first concrete layer 5; a channel steel 2 is transversely arranged across the hinged joint at the top of the two hollow slab beam bodies 4, and the bottom of the channel steel 2 is anchored to the beam top of the hollow slab beam body 4 by a first chemical anchor bolt 201, and a plurality of connecting steel bars 202 are arranged through the wing plate of the channel steel 2; a second concrete layer 6 is paved on the top of the hollow slab beam body 4, the channel steel 2 is located in the second concrete layer 6, and asphalt is paved on the second concrete layer 6 Mixed material layer 7; also includes U-shaped steel plate 1, U-shaped steel plate 1 is made of Q345 steel rolled as required, and the outer sides of the wing plate edges of the U-shaped steel plate 1 are respectively provided with extension surfaces 101 parallel to the bottom surface, and the two extension surfaces 101 are pasted to the bottom of the two hollow slab beam bodies 4 across the hinge joint; a number of gate-type steel bars 8 are implanted in the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4 at equal intervals across the hinge joint, and the arrangement is arranged every 20 cm along the longitudinal direction; the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4 is filled with a grouting material layer 9.

[0035] A plurality of prestressed corrugated pipes 3 are tied with steel wires in the cavity formed by the portal steel bar 8 and the hollow slab beam body 4, and a plurality of steel strands 11 are tensioned in the prestressed corrugated pipes 3.

[0036] A plurality of stiffening ribs 102 are welded on both sides of the lower end surface of the U-shaped steel plate 1 .

[0037] Embodiment 3:

[0038] The reinforced hollow slab beam comprises two hollow slab beam bodies 4 connected by a hinged joint side by side, and the hinged joints of the two hollow slab beam bodies 4 are filled with a first concrete layer 5; a channel steel 2 is transversely arranged across the hinged joint at the top of the two hollow slab beam bodies 4, and the bottom of the channel steel 2 is anchored to the beam top of the hollow slab beam body 4 by a first chemical anchor bolt 201, and a plurality of connecting steel bars 202 are arranged through the wing plate of the channel steel 2; a second concrete layer 6 is paved on the top of the hollow slab beam body 4, the channel steel 2 is located in the second concrete layer 6, and asphalt is paved on the second concrete layer 6 Mixed material layer 7; also includes U-shaped steel plate 1, U-shaped steel plate 1 is made of Q345 steel rolled as required, and the outer sides of the wing plate edges of the U-shaped steel plate 1 are respectively provided with extension surfaces 101 parallel to the bottom surface, and the two extension surfaces 101 are pasted to the bottom of the two hollow slab beam bodies 4 across the hinge joint; a number of gate-type steel bars 8 are implanted in the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4 at equal intervals across the hinge joint, and the arrangement is arranged every 20 cm along the longitudinal direction; the cavity formed by the U-shaped steel plate 1 and the hollow slab beam body 4 is filled with a grouting material layer 9.

[0039] A plurality of prestressed corrugated pipes 3 are tied with steel wires in the cavity formed by the portal steel bar 8 and the hollow slab beam body 4, and a plurality of steel strands 11 are tensioned in the prestressed corrugated pipes 3.

[0040] A plurality of stiffening ribs 102 are welded on both sides of the lower end surface of the U-shaped steel plate 1 .

[0041] A plurality of welding pins 103 are arranged on the bottom surface of the upper end surface of the U-shaped steel plate 1 .

Claims

1. Reinforced hollow slab beam, characterized in that: The invention comprises two hollow slab beam bodies (4) connected by a hinged joint side by side, wherein the hinged joints of the two hollow slab beam bodies (4) are filled with a first concrete layer (5); a channel steel (2) is transversely arranged across the hinged joint at the top of the two hollow slab beam bodies (4), the bottom of the channel steel (2) is anchored to the top of the hollow slab beam body (4) by a first chemical anchor bolt (201), and a plurality of connecting steel bars (202) are arranged through the wing plate of the channel steel (2); the top of the hollow slab beam body (4) is provided with a plurality of connecting steel bars (202); The second concrete layer (6) is paved on the bottom, and the channel steel (2) is located in the second concrete layer (6); it also includes a U-shaped steel plate (1), and the outer sides of the wing plate edges of the U-shaped steel plate (1) are respectively provided with extension surfaces (101) parallel to the bottom surface, and the two extension surfaces (101) are pasted to the bottom of the two hollow slab beam bodies (4) across the hinged joint; a plurality of gate-type steel bars (8) are implanted at equal intervals in the cavity formed by the U-shaped steel plate (1) and the hollow slab beam body (4) across the hinged joint.

2. The reinforced hollow slab beam according to claim 1, characterized in that: The cavity formed by the U-shaped steel plate (1) and the hollow slab beam body (4) is filled with a grouting material layer (9).

3. The reinforced hollow slab beam according to claim 2, characterized in that: A plurality of prestressed corrugated pipes (3) are tied with steel wires in the cavity formed by the gate-type steel bars (8) and the hollow slab beam body (4), and a plurality of steel strands (11) are tensioned in the prestressed corrugated pipes (3).

4. The reinforced hollow slab beam according to claim 1, characterized in that: An adhesive layer is provided between the bottom of the channel steel (2) and the top of the hollow slab beam body (4).

5. The reinforced hollow slab beam according to claim 1, characterized in that: It also comprises a second chemical anchor bolt (10), wherein the second chemical anchor bolt (10) passes through the extension surface (101) and is fixedly connected to the bottom of the hollow slab beam body (4).

6. The reinforced hollow slab beam according to claim 1, characterized in that: A plurality of stiffening ribs (102) are welded to the two side surfaces of the lower end surface of the U-shaped steel plate (1), and each stiffening rib (102) is perpendicular to the extension surface (101) and the side surface of the lower end surface of the U-shaped steel plate (1).

7. The reinforced hollow slab beam according to claim 1, characterized in that: A plurality of welding pins (103) are arranged on the bottom surface of the upper end surface of the U-shaped steel plate (1).

8. The reinforced hollow slab beam according to claim 1, characterized in that: An asphalt mixture layer (7) is laid on the second concrete layer (6).

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