Concrete ribbed composite slab

Abstract

The utility model discloses a kind of concrete rib superimposed boards, belong to superimposed board technical field;Including prefabricated bottom plate, the inside of the prefabricated bottom plate is provided with bottom plate reinforcement, the top of the prefabricated bottom plate is provided with longitudinal reinforcing rib and transverse reinforcing rib, the longitudinal reinforcing rib and transverse reinforcing rib are mutually crossed and set, the inside of the prefabricated bottom plate is provided with connecting piece, the connecting piece is through prefabricated bottom plate and cast-in-place concrete layer, and the end portion of connecting piece is bent and forms anchoring structure.The utility model is combined by prefabrication and cast-in-place, cooperates the reinforcement of connecting piece, avoids the situation that prefabricated layer and cast-in-place layer will not be offset, simultaneously the mortise and tenon groove can be docked, then through pouring reinforcement, and then make the integrity of prefabricated bottom plate after installation better, to make the installation effect of superimposed board better.

Description

Technical Field

[0001] This utility model relates to the field of composite slab technology, and in particular to a concrete ribbed composite slab. Background Technology

[0002] Ribbed concrete slabs are a type of composite floor slab structure that combines precast and cast-in-place processes. The longitudinal and transverse reinforcing ribs in the precast base slab form a grid-like support system, which significantly improves the resistance to bending, shear and deformation, and is especially suitable for large-span floor slabs.

[0003] However, the existing composite slab structure is relatively simple, which is simply reinforcing ribs combined with concrete for pouring. Such composite slabs are individual units, and the overall integrity after being stacked is poor, making them inconvenient to use. Therefore, we propose a concrete-ribbed composite slab to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies mentioned in the background section by proposing a concrete ribbed composite slab.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A reinforced concrete composite slab includes a precast base slab with reinforcing bars inside. The top of the precast base slab has longitudinal and transverse reinforcing ribs that are arranged intersecting each other. A connector is provided inside the precast base slab, which penetrates the precast base slab and the cast-in-place concrete layer, and the end of the connector is bent to form an anchoring structure.

[0007] The overall integrity is improved by combining prefabrication and cast-in-place construction, cross ribs enhance bending stiffness, and anchoring connectors prevent interlayer slippage.

[0008] Preferably, the cross-sections of the longitudinal reinforcing ribs and the transverse reinforcing ribs are both trapezoidal, the height of the longitudinal reinforcing ribs and the transverse reinforcing ribs is 30mm, and the spacing between them is 300mm.

[0009] Trapezoidal ribs optimize stress transfer, and parameter ranges balance load-bearing capacity and material cost.

[0010] Preferably, prestressed steel strands are pre-embedded in the longitudinal reinforcing ribs, with both ends extending out of the plate to form tensioning ends;

[0011] Prestressed design reduces the risk of cracking and is suitable for large-span applications.

[0012] Preferably, the connector is U-shaped, with its vertical section embedded inside the cast-in-place concrete layer and its horizontal section welded to the bottom slab reinforcement.

[0013] The U-shaped connection provides bidirectional constraint, and welding ensures reliable force transmission.

[0014] Preferably, the edge of the precast base plate is provided with a tenon groove, and then the adjacent composite plates are connected by grouting in the groove;

[0015] The mortise and tenon joint structure improves assembly accuracy and avoids the need for on-site formwork.

[0016] Preferably, the cast-in-place concrete layer is provided with obliquely distributed temperature reinforcement bars, with a diameter of 8mm and a spacing of 150mm;

[0017] Temperature-controlled ribs prevent shrinkage cracks and are arranged at an angle to resist multi-directional stress.

[0018] Preferably, the top of the transverse reinforcing rib is provided with a clearance groove, and the interior of the clearance groove is sealed with mortar after the pipeline is inserted inside;

[0019] It integrates pipeline laying functions, reducing the damage to the structure caused by secondary trenching.

[0020] Preferably, the bottom surface of the precast base plate is laminated with an insulation board, and the precast base plate and the insulation board are fixed by chemical anchors;

[0021] Integrated insulation structure simplifies the construction process.

[0022] Preferably, it also includes a leveling layer, which is formed on the cast-in-place concrete layer (2) and covers the anchoring structure;

[0023] The anchoring structure can be covered to allow it to be used normally.

[0024] Preferably, a spiral stirrup is provided at the intersection of the longitudinal reinforcing rib and the transverse reinforcing rib, and the spiral stirrup is embedded inside the longitudinal reinforcing rib and the transverse reinforcing rib;

[0025] Node reinforcement prevents stress concentration failure, while spiral stirrups enhance shear resistance.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] 1. This utility model combines prefabrication and cast-in-place construction, and reinforces the connection components to prevent the prefabricated layer and the cast-in-place layer from shifting. At the same time, the mortise and tenon groove can be connected, and then reinforced by casting, so that the overall integrity of the prefabricated base plate after installation is better, thus making the installation effect of the composite slab better.

[0028] 2. This utility model can better support the structure of longitudinal and transverse reinforcing ribs. At the same time, the spiral stirrup can fix the connection between the longitudinal and transverse reinforcing ribs, and further improve the casting effect and stability of the prestressed steel strands and holes. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of a concrete ribbed composite slab proposed in this utility model;

[0030] Figure 2 for Figure 1 A partial cross-sectional structural diagram of the cast-in-place concrete layer;

[0031] Figure 3 for Figure 2 Schematic diagram of the middle connector;

[0032] Figure 4 for Figure 2 Schematic diagram of longitudinal and transverse reinforcing ribs;

[0033] Figure 5 for Figure 4 A schematic diagram showing the separation state of the longitudinal and transverse reinforcing ribs.

[0034] In the diagram: 1. Precast base slab; 2. Cast-in-place concrete layer; 3. Longitudinal reinforcing ribs; 4. Transverse reinforcing ribs; 5. Base slab reinforcement; 6. Connectors; 7. Tenon and mortise grooves; 8. Insulation board; 9. Prestressed steel strands; 10. Clearance grooves; 11. Spiral stirrups. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0036] Reference Figure 1-5 The concrete ribbed composite slab shown has bottom plate reinforcing bars 5 fixedly installed inside the precast bottom plate 1. The bottom plate reinforcing bars 5 are intersected vertically and horizontally, forming a grid pattern, which can enhance the strength of the precast bottom plate 1. Then, longitudinal reinforcing ribs 3 and transverse reinforcing ribs 4 are fixedly installed at the top of the precast bottom plate 1. The longitudinal reinforcing ribs 3 and transverse reinforcing ribs 4 are intersected vertically and horizontally, and the cross-section of the longitudinal reinforcing ribs 3 and transverse reinforcing ribs 4 is trapezoidal. At the same time, prestressed steel strands 9 are fixedly installed inside the longitudinal reinforcing ribs 3, and both ends of the prestressed steel strands 9 extend outside the plate to form tension ends. Then, the top of the transverse reinforcing ribs 4 is provided with a clearance groove 10, which can avoid conflict with the prestressed steel strands 9 embedded inside the longitudinal reinforcing ribs 3. At the same time, spiral stirrups 11 are fixedly installed at the junction of the longitudinal reinforcing ribs 3 and transverse reinforcing ribs 4. The spiral stirrups 11 are embedded inside the longitudinal reinforcing ribs 3 and transverse reinforcing ribs 4 to reinforce the connection between the longitudinal reinforcing ribs 3 and transverse reinforcing ribs 4.

[0037] For a detailed description of the precast base plate 1 in this embodiment, please refer to [link / reference]. Figure 2 and Figure 3Insulation board 8 is fixedly installed at the bottom of the precast base slab 1. Tenon and mortise grooves 7 are fixedly installed around the perimeter of the precast base slab 1. Adjacent composite slabs are connected by grouting in the grooves. At the same time, the cast-in-place concrete layer 2 is provided with diagonally distributed 21 bars with a diameter of 8 mm and a spacing of 150 mm. This can control shrinkage cracks and resist multi-directional stress by diagonal arrangement. Then, connectors 6 are set inside the precast base slab 1. Connector 6 is an inverted U-shaped steel bar. Its vertical section is embedded in the cast-in-place concrete layer 2, and its horizontal section is welded to the base slab steel bar 5 inside the precast base slab 1. The thickness of the cast-in-place concrete layer 2 is 1.2 times that of the precast base slab 1, and the surface is imprinted with anti-slip texture. The cast-in-place concrete layer 2 is provided with diagonally distributed temperature ribs with a diameter of 8 mm and a spacing of 150 mm. This can prevent the device from cracking due to thermal expansion and contraction. At the same time, after the entire device is installed, a leveling layer is poured on its surface. This leveling layer is poured later and can cover the anchor points. Therefore, it is not shown in the figure.

[0038] In this utility model, the installation, connection or setting methods of all the components mentioned above are common mechanical methods, and the specific structure, model and coefficient index of all the components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented, so they will not be described in detail.

[0039] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

[0040] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside, and vertical and horizontal" in the terminology only represent the orientation of the term in its conventional use or are common names understood by those skilled in the art, and should not be regarded as limitations on the term. At the same time, numerals such as "first," "second," and "third" do not represent specific quantities or orders, but are only used to distinguish names. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A reinforced concrete ribbed composite slab, comprising a precast base slab (1), characterized in that, The precast base plate (1) is provided with base plate reinforcement (5) inside. The top of the precast base plate (1) is provided with longitudinal reinforcing ribs (3) and transverse reinforcing ribs (4). The longitudinal reinforcing ribs (3) and transverse reinforcing ribs (4) are arranged to cross each other. The precast base plate (1) is provided with connectors (6) inside. The connectors (6) penetrate the precast base plate (1) and the cast-in-place concrete layer (2), and the ends of the connectors (6) are bent to form an anchoring structure.

2. The reinforced concrete ribbed composite slab according to claim 1, characterized in that, The cross-sections of the longitudinal reinforcing rib (3) and the transverse reinforcing rib (4) are both trapezoidal. The height of the longitudinal reinforcing rib (3) and the transverse reinforcing rib (4) is 30mm, and the spacing between adjacent transverse reinforcing ribs (4) and adjacent longitudinal reinforcing ribs (3) is 300mm.

3. The reinforced concrete ribbed composite slab according to claim 1, characterized in that, The longitudinal reinforcing rib (3) is pre-embedded with prestressed steel strands (9), which extend out of the plate at both ends to form tensioning ends.

4. A reinforced concrete ribbed composite slab according to claim 3, characterized in that, The connector (6) is U-shaped, with its vertical section embedded in the interior of the cast-in-place concrete layer (2) and its horizontal section welded to the bottom plate reinforcement (5).

5. A reinforced concrete ribbed composite slab according to claim 4, characterized in that, The precast base plate (1) has a tenon groove (7) on its edge, and the adjacent composite plates are then connected by grouting in the groove.

6. A reinforced concrete ribbed composite slab according to claim 1, characterized in that, The cast-in-place concrete layer (2) is provided with obliquely distributed temperature reinforcement bars with a diameter of 8 mm and a spacing of 150 mm.

7. A reinforced concrete ribbed composite slab according to claim 3, characterized in that, The top of the transverse reinforcing rib (4) is provided with a relief groove (10), and the interior of the relief groove (10) is filled with mortar and sealed after the pipeline is inserted.

8. A reinforced concrete ribbed composite slab according to claim 3, characterized in that, The bottom surface of the precast base plate (1) is composite with an insulation board (8), and the precast base plate (1) and the insulation board (8) are fixed by chemical anchors.

9. A reinforced concrete ribbed composite slab according to claim 1, characterized in that, It also includes a leveling layer, which is formed on the cast-in-place concrete layer (2) and covers the anchoring structure.

10. A reinforced concrete ribbed composite slab according to claim 3, characterized in that, A spiral stirrup (11) is provided at the intersection of the longitudinal reinforcing rib (3) and the transverse reinforcing rib (4), and the spiral stirrup (11) is embedded inside the longitudinal reinforcing rib (3) and the transverse reinforcing rib (4).

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