Composite prefabricated dense rib superposed beam plate

Abstract

The utility model relates to a composite prefabricated dense rib superposed beam plate. The concrete beam comprises a steel reinforcement framework and a cement base body, the cement base body is divided into a first beam body, a second beam body and a plate body connected between the upper portions of the two beam bodies, and an inclined downward bending part is formed at the connecting position of the plate body and the two beam bodies; the steel bar framework is divided into a first beam cage, a second beam cage, a distribution bar net and a downward bending steel bar set. A plurality of third stress ribs distributed at equal intervals are further arranged at the bottom of the distribution rib net, third structural ribs are connected between the third stress ribs and the distribution rib net, and reinforcing ribs wrapping the third stress ribs are arranged at the bottom of the plate body. The dense ribs have similar functions with truss ribs on an existing beam plate, have better mechanical strengthening effect and improve bending and cracking resistance effects. And no shielding object is formed on the upper surface of the plate body, so that free wiring of the pipeline is facilitated.

Description

Technical Field

[0001] This utility model relates to a precast cement component, and more particularly to a composite precast dense ribbed composite beam slab. Background Technology

[0002] Precast concrete components are widely used in building construction, elevated highways, bridges, and other engineering projects. Compared to cast-in-place construction, the stable quality of precast concrete components is a major advantage. Because precast concrete components are produced in standardized factories with strict quality control systems, each component meets design requirements, thus guaranteeing the overall quality of the construction project. Secondly, high construction efficiency is another significant advantage of precast concrete components. Using precast concrete components can greatly shorten the construction cycle, as most components are manufactured in the factory and then transported directly to the site for assembly, reducing on-site work time and labor costs.

[0003] Precast components are widely used in existing building construction, with precast beams and slabs being one example. Precast beams and slabs replace cast-in-place floor slabs. They can be assembled with precast beams and load-bearing columns, and the upper part of the precast beams and slabs requires cast-in-place concrete after installation. Common precast beams and slabs consist of a cement matrix and a steel reinforcement frame. Truss reinforcement is installed on the upper part of the steel reinforcement frame, partially exposed on the precast beam and slab, and will be covered after the concrete pouring process. The truss reinforcement mainly plays a role in mechanical strengthening during the construction phase, improving bending and crack resistance, dispersing stress during hoisting, and increasing the load-bearing capacity of the beam and slab to some extent. Before the cast-in-place concrete is poured on top of these precast beams and slabs, pipe installation is required. However, the truss reinforcement can affect pipe distribution and hinder free routing. The truss reinforcement is constructed by welding three main steel bars and two corrugated steel bars, forming a triangular cage-like structure. (See attached diagram for details.) Figure 7 This leads to higher steel consumption, which in turn increases production costs. Summary of the Invention

[0004] This utility model provides a composite precast densely ribbed composite beam-slab, which solves the problem in the prior art that setting truss reinforcement on the beam-slab leads to increased steel consumption and hinders pipeline distribution.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a composite precast densely ribbed composite beam-slab, comprising a steel reinforcement cage and a cement matrix, wherein the cement matrix is ​​divided into a first beam, a second beam, and a slab connecting the upper parts of the two beams, and the connection between the slab and the two beams forms an inclined downward bend; the steel reinforcement cage is divided into a first beam cage located inside the first beam, a second beam cage located inside the second beam, a distribution reinforcement mesh located inside the slab, and a downward bend reinforcement group located inside the downward bend, wherein the upper end of the downward bend reinforcement group... Connected to the distributed reinforcement mesh, the lower end of the downward-bent reinforcement group is connected to the two beam cages. The first beam cage is composed of a first main reinforcement, a first stirrup, a first structural reinforcement, and a first hoop at the bottom. The second beam cage is composed of a second main reinforcement, a second stirrup, a second structural reinforcement, and a second hoop at the bottom. The bottom of the distributed reinforcement mesh is also provided with several equally spaced third main reinforcements. The third main reinforcements are connected to the distributed reinforcement mesh with third structural reinforcements. The two ends of the third main reinforcements are connected to the two beam bodies. The bottom of the slab is provided with dense ribs that wrap around the third main reinforcements.

[0006] This utility model consists of a first beam, a second beam, and a slab. The two sides of the slab are integrated with the two beams via downward bends, achieving beam-slab integration and improving the overall structural strength and stability during construction. This utility model enhances connection strength by embedding downward-bent reinforcing bars within the downward bends. The downward-bent reinforcing bars (also called bent-up bars) in these bars serve two purposes: their bent-up sections can withstand the principal tensile stress generated by the bending moment; the horizontal sections after bending primarily act as anchorage. Furthermore, this utility model further strengthens the overall stability and bending strength of the slab by setting several dense ribs at the bottom of the slab. The ends of these ribs connect to the downward bends and the two beams. The dense ribs in this utility model function similarly to the truss reinforcement in existing beams and slabs, but offer better mechanical strengthening and improved bending and crack resistance. Additionally, because they are located below the slab, the upper surface of the slab is not obstructed, facilitating free routing of pipes. Furthermore, the third reinforcing bar inside the dense rib is located below the distribution reinforcement mesh. During the production process, the third reinforcing bar can be positioned without much fixing. Therefore, compared with the previous solution, this utility model can reduce the amount of steel bars used in the production process.

[0007] Furthermore, both ends of the first and second reinforcing bars extend into the interior of the beam and are bent upwards at 90° at the ends. When the two closely ribbed composite beam slabs are joined, cement pouring is required at the joint. The exposed portions at both ends of the two reinforcing bars are pre-designed structural connection bars. These exposed bars are integrated with other components through subsequent concrete pouring or welding processes, ensuring effective load transfer and preventing structural misalignment. After the reinforcing bars on the two closely ribbed composite beam slabs are connected and fixed, they serve as tie bars. These bars connect and fix adjacent components, making the floor slab a whole, thereby increasing the structural integrity and seismic resistance, and enhancing seismic resistance.

[0008] Furthermore, the upper ends of the first and second stirrups are partially exposed. After installation, the upper side of this invention still needs to be poured with cement. The partial exposure of the upper ends of the first and second stirrups can improve the connection strength.

[0009] Furthermore, the upper surface of the first beam is provided with a first shear groove distributed along its length, and the upper surface of the second beam is provided with a second shear groove distributed along its length. The two shear grooves can increase the contact area between the cast-in-place cement and this invention, thereby improving the quality of the bonding surface.

[0010] Therefore, this utility model has the following characteristics compared with the prior art: 1. This utility model prefabricates beams and slabs in one piece through integrated casting, and improves the overall connection strength and stability through the internal steel reinforcement skeleton design, reduces the subsequent construction process, and helps to improve the construction efficiency of bridges and elevated projects and improve the reliability of quality; 2. The dense ribs on this utility model play a similar role to the truss reinforcement on existing beams and slabs, and have a better mechanical strengthening effect, improving the bending and crack resistance; 3. No obstructions are formed on the upper surface of the slab, which facilitates the free routing of pipelines. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Appendix Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0013] Appendix Figure 3 This is a partial structural diagram of the steel reinforcement cage;

[0014] Appendix Figure 4 It is attached Figure 3 The front view;

[0015] Appendix Figure 5 It is attached Figure 3 Enlarged view of part A;

[0016] Appendix Figure 6 These are various specific schemes for the third structural reinforcement;

[0017] Appendix Figure 7 This is a schematic diagram of the structure of Example 2. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[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", "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 are not intended to indicate or imply that the device or element 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.

[0020] Example 1: See Figure 1 , Figure 3 and Figure 4 A composite precast ribbed composite beam-slab includes a steel reinforcement cage 10 and a cement matrix 20. The cement matrix is ​​divided into a first beam 11, a second beam 12, and a slab 13 connecting the upper parts of the two beams. The upper surfaces of the first beam, the second beam, and the slab are all rough surfaces to increase the bonding effect of the concrete surfaces poured in two separate pours. The connection between the slab and the two beams forms an inclined downward bend 14. The steel reinforcement cage is divided into a first beam cage 30 located inside the first beam, a second beam cage 40 located inside the second beam, a distribution reinforcement mesh 50 located inside the slab, and a downward bend located inside the downward bend. The reinforcing bar group 60 consists of a downward-bent reinforcing bar group 61 and a continuous reinforcing bar 62. The upper end of the downward-bent reinforcing bar group is connected to the distribution reinforcement mesh, and the lower end of the downward-bent reinforcing bar group is connected to the two beam cages. The first beam cage is composed of a first main reinforcing bar 31, a first stirrup 32, a first structural reinforcing bar 33, and a first stirrup 34 located at the bottom. The second beam cage is composed of a second main reinforcing bar 41, a second stirrup 42, a second structural reinforcing bar 43, and a second stirrup 44 located at the bottom. At the bottom of the distribution reinforcement mesh, there are also several equally spaced third main reinforcing bars 51. The third main reinforcing bars are connected to the distribution reinforcement mesh by third structural reinforcing bars 52 (see...). Figure 5 The two ends of the third reinforcing bar are connected to the two beams, and the bottom of the slab is provided with dense ribs 15 that wrap around the third reinforcing bar (see...). Figure 2 ).

[0021] This embodiment mainly consists of a first beam, a second beam, and a slab. The two sides of the slab are integrated with the two beams via downward bends, achieving beam-slab integration and thus improving the overall structural strength and stability. This embodiment enhances connection strength by embedding downward-bent steel reinforcement groups within the downward bends. The downward-bent steel reinforcement groups serve two purposes: their bent-up sections can withstand the principal tensile stress generated by the bending moment; the horizontal sections after bending primarily act as anchorage. Furthermore, this invention also provides several closely spaced ribs at the bottom of the slab, with both ends connecting to the downward bends and the two beams, further strengthening the overall stability and bending strength of the slab.

[0022] See Figure 1 Both ends of the first and second reinforcing bars extend inwards from the beam structure and are bent upwards at 90° at the ends. When connecting two closely ribbed composite beam sections, cement pouring is required at the connection point. The exposed ends of the two reinforcing bars are pre-designed structural connection bars. These exposed bars are integrated with other components through subsequent concrete pouring or welding processes, ensuring effective load transfer and preventing structural misalignment. After the reinforcing bars on the two closely ribbed composite beam sections are connected and fixed, they serve as tie bars. These bars connect and fix adjacent components, improving the stability of infill walls, beams, columns, and other parts, while also enhancing seismic resistance.

[0023] See Figure 1 The upper ends of the first and second stirrups are partially exposed. The upper sides of the first and second beams also require cast-in-place guardrails; the exposed upper ends of the first and second stirrups improve the connection strength.

[0024] See Figure 1 The first keyway 16 and the second keyway 17 are respectively provided on the same side end face of the first beam and the second beam.

[0025] See Figure 1 The upper surface of the first beam is provided with a first shear groove 18 distributed along its length, and the upper surface of the second beam is provided with a second shear groove 19 distributed along its length.

[0026] The third structural reinforcement can take many forms and can be designed according to actual needs. This embodiment provides the following options: tie bars, S-shaped structural reinforcement, L-shaped structural reinforcement, and quadrilateral structural reinforcement, see figure. Figure 5 and Figure 6 .

[0027] Example 2: See Figure 7 This embodiment adds truss reinforcement 100 to the basis of embodiment 1 to deal with some situations where the results of embodiment 1 alone cannot meet the requirements or it is necessary to set truss reinforcement.

[0028] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A composite precast densely ribbed composite beam-slab, comprising a steel reinforcement cage and a cement matrix, characterized in that: The cement matrix is ​​divided into a first beam, a second beam, and a slab connecting the upper parts of the two beams. The connection between the slab and the two beams forms an inclined downward bend. The reinforcing steel cage is divided into a first beam cage located inside the first beam, a second beam cage located inside the second beam, a distribution reinforcement mesh located inside the slab, and a downward bend reinforcement group located inside the downward bend. The upper end of the downward bend reinforcement group is connected to the distribution reinforcement mesh, and the lower end of the downward bend reinforcement group is connected to the two beam cages. The first beam cage is composed of a first main reinforcing bar, a first vertical reinforcing bar, a first structural reinforcing bar, and a first stirrup located at the bottom. The second beam cage is composed of a second main reinforcing bar, a second vertical reinforcing bar, a second structural reinforcing bar, and a second stirrup located at the bottom. The bottom of the distribution reinforcement mesh is also provided with several equally spaced third main reinforcing bars. The third main reinforcing bars are connected to the distribution reinforcement mesh by third structural reinforcing bars. The two ends of the third main reinforcing bars are connected to the two beams. The bottom of the slab is provided with dense ribs that wrap around the third main reinforcing bars.

2. The composite precast densely ribbed composite beam-slab according to claim 1, characterized in that: Both ends of the first and second reinforcing bars extend into the interior of the beam and are bent upwards at 90° at the ends.

3. The composite precast densely ribbed composite beam-slab according to claim 1, characterized in that: The upper ends of the first stirrup and the second stirrup are partially exposed.

4. The composite precast densely ribbed composite beam-slab according to claim 1, characterized in that: The first beam and the second beam are respectively provided on the same side end face.

5. The composite precast densely ribbed composite beam-slab according to claim 4, characterized in that: The upper surface of the first beam is provided with a first shear groove distributed along its length, and the upper surface of the second beam is provided with a second shear groove distributed along its length.

6. The composite precast closely ribbed composite beam-slab according to claim 1, characterized in that: The third structural reinforcement can be one or more of the following: tie bar, S-shaped structural reinforcement, L-shaped structural reinforcement, and quadrilateral structural reinforcement.

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