Prefabricated part of laminated slab and laminated slab

Abstract

The utility model provides a prefabricated part of a laminated slab and the laminated slab, and belongs to the field of fabricated buildings, and the prefabricated part comprises a prefabricated bottom plate and a connecting assembly. A plurality of concrete ribs are formed on the prefabricated bottom plate side by side at intervals in the span direction, a plurality of line pipe grooves are formed in the concrete ribs, and the concrete ribs form continuous rib sections and groove sections through the line pipe grooves. The connecting assembly comprises a first connecting piece and a second connecting piece. The first connecting piece at least comprises a top main body and two side main bodies, the first connecting piece is arranged in the line pipe groove, the two side main bodies are attached to the rib sections on the two sides of the line pipe groove respectively, and the top main body is connected to the two side main bodies and forms a line pipe passing space with the line pipe groove; the second connecting piece penetrates through or spans the first connecting piece, and the two ends of the second connecting piece are tied to the rib sections on the two sides of the line pipe groove respectively.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated buildings, and in particular relates to a prefabricated part of a composite slab and the composite slab itself. Background Technology

[0002] Ribbed composite concrete slabs typically employ a method of creating openings in the ribs to allow for the horizontal placement of electrical conduits and wiring. However, this method can weaken the concrete ribs, leading to their breakage. Furthermore, production is inconvenient, which has hindered the widespread adoption of ribbed composite slabs.

[0003] Other solutions use steel trusses or steel pipe trusses to connect the base plate and the ribs to form a space for conduits to pass under the ribs, but this solution is expensive and difficult to manufacture. Therefore, this utility model was developed. Utility Model Content

[0004] The purpose of this utility model is to provide a composite slab that is convenient for conduit arrangement, can maintain a large bending stiffness of the precast base plate, and has low production cost; to this end, this utility model first provides a precast portion of the composite slab, characterized in that it includes:

[0005] A precast base slab, wherein concrete ribs are formed along the span direction on the precast base slab, and multiple conduit grooves are opened on the concrete ribs, and the concrete ribs form continuous rib segments and groove segments through the conduit grooves;

[0006] A connecting assembly includes a first connector and a second connector; the first connector includes a top body and two side bodies, the first connector is disposed in the conduit groove, the two side bodies are respectively attached to the ribs on both sides of the conduit groove, the top body is connected to the two side bodies and forms a conduit space with the conduit groove; the second connector passes through or spans the first connector and its two ends are respectively connected to the ribs on both sides of the conduit groove.

[0007] Preferably, the first connector is a U-shaped thin plate, the side body is implemented as a side plate, and the top body is implemented as a top plate.

[0008] Preferably, the side plate and / or the top plate are mesh panels.

[0009] Preferably, the second connector is a tie bar or a tie plate, which is disposed through or across the first connector.

[0010] Preferably, the second connector passes through the side body; or, the second connector spans the top body.

[0011] Preferably, the second connector is connected to the top body.

[0012] Preferably, the second connector includes a bolted section tied to the rib segment and a force-transmitting section that passes through or spans the first connector; a protective layer is formed between the bolted section and the top surface of the concrete rib.

[0013] Preferably, the side plate is implemented as a corrugated plate, an arc-shaped plate, or a corner plate.

[0014] Preferably, the top main body has a through opening that passes through the conduit space.

[0015] This utility model also provides a composite slab, characterized in that it includes a cast-in-place layer, a conduit, and a precast portion of the composite slab; the conduit passes through the conduit groove on the concrete rib, and the cast-in-place layer is formed on the precast base slab and at least covers the concrete rib and the conduit.

[0016] The technical effects achieved by the above-mentioned technical solution of this utility model are derived from one or more of the following combinations:

[0017] Other reinforced concrete composite slabs use concrete ribs and internal steel bars to transfer force at the top of the holes for conduits and reinforcing bars. These ribs have a large top thickness and a small space for conduits, making conduit installation difficult in practical projects and hindering their widespread application. This invention uses a thinner U-shaped groove to connect the concrete ribs, creating a conduit space that is much larger.

[0018] The first connector uses a steel U-shaped groove as a forming mold for the conduit groove, which facilitates the forming of the concrete rib hole.

[0019] The precast portion of the composite slab is used as a simply supported slab during construction. At the conduit location, the positive bending moment is much greater than the negative bending moment (negative bending moments are generally only generated during demolding, hoisting, and transportation). Therefore, the compressive force on the ribs at the conduit location is much greater than the tensile force. A connection component combining reinforcing bars and U-shaped channels is used. The compressive strength is shared by the reinforcing bars and the U-shaped channels, while the tensile strength is borne solely by the reinforcing bars (the U-shaped channels and the concrete ribs on both sides have strong compressive strength but very weak bonding force, making them almost unable to withstand tensile forces). This saves on the cost of the connection component.

[0020] The second connector is fixed to the top of the U-shaped channel, which is equivalent to acting as a stiffening rib for the thin steel plate at the top of the U-shaped channel. This makes the thin steel plate at the top of the U-shaped channel less prone to out-of-plane buckling when subjected to pressure, allowing the U-shaped channel to use very thin steel plates and saving material costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the structure of the prefabricated portion of the composite slab in this utility model.

[0022] Figure 2 This diagram illustrates the structure of the ribs and grooves in the prefabricated portion of the composite slab in this invention.

[0023] Figure 3 This diagram illustrates a structural design of the connecting component in this invention.

[0024] Figure 4 This diagram illustrates the clamping and fixing of the connecting components and prestressing tendons in this utility model.

[0025] Figure 5 This diagram illustrates another structural schematic of the prefabricated portion of the composite slab in this invention.

[0026] Figure 6 This diagram illustrates another structural design of the connecting component in this invention.

[0027] Figure 7 This diagram illustrates the structure of the composite plate in this invention. Detailed Implementation

[0028] The following description is provided to enable those skilled in the art to implement and use the present invention and to incorporate it into specific application contexts. Various modifications and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0029] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that practice of the present invention is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed representation to avoid obscuring the present invention.

[0030] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0031] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0034] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0035] Example 1:

[0036] Please see Figures 1-6 This embodiment provides a prefabricated portion of a composite slab, comprising a prefabricated base plate 1 and a connecting assembly 3. The prefabricated base plate 1 has concrete ribs 2 formed along its span direction, and multiple conduit grooves 20 are formed on the concrete ribs 2, creating continuous rib segments 21 and groove segments 22 through the conduit grooves 20. The connecting assembly 3 includes a first connector 31 and a second connector 32; the first connector 31 includes at least one top body 311 and two side bodies 32, the first connector 31 is disposed in the conduit groove 20, the two side bodies 32 are respectively attached to the rib segments 21 on both sides of the conduit groove 20, and the top body 311 connects to the two side bodies 32 and forms a conduit space with the conduit groove 20; the second connector 32 passes through or spans the first connector 31 and its two ends are respectively connected to the rib segments 21 on both sides of the conduit groove 20.

[0037] The precast base slab 1 is a prestressed base slab. The concrete ribs 2 on the prestressed base slab can be formed in one step or in stages using concrete forming equipment such as extruders or slipform machines. Alternatively, they can be cast using a casting mold, which is not a limitation.

[0038] The prestressed base plate includes prestressing tendons 11. In a preferred embodiment of this invention, during the forming of the prestressed base plate, the side body 32 of the first connector 31 of the connecting assembly 3 is fixed to the prestressing tendon 11, facilitating the position fixation of the first connector 31. The fixing method can be welding, adhesive bonding, or... Figure 4 The clamping and fixing methods of the middle clamp are not considered as limitations.

[0039] As a structural component, the connecting assembly 3 plays a role in tensile and compressive resistance during the prefabrication, transportation, hoisting, installation, and casting of the composite slab, thereby ensuring space for conduit routing while preventing cracking of the concrete ribs 2. Specifically, the first connecting member 31 is located in the conduit groove 20, with its two side bodies 32 attached to the ribs 21 on both sides of the groove section 22, serving a pressure-bearing function (the bonding of the side bodies 32 to the ribs 21 also achieves tensile resistance); while the two ends of the second connecting member 32 are respectively connected to the ribs 21 on both sides, and the force is transmitted through the middle section to achieve a tensile effect.

[0040] This embodiment provides two implementation methods for the first connector 31:

[0041] 1. The first connecting member 31 is a U-shaped thin plate, the side body 32 is implemented as a side plate, and the top body 311 is implemented as a top plate.

[0042] 2. The first connecting member 31 is a U-shaped mesh panel, the side body 32 is implemented as a mesh panel, and / or the top body 311 is implemented as a mesh panel.

[0043] Furthermore, regardless of whether the first connecting member 31 is a U-shaped thin plate or a U-shaped mesh plate, its top main body 311 can be a whole plate or multiple strips arranged side by side, or a structure formed by multiple rods, ribs and other structures arranged side by side to form a "plate", all of which should be covered by this embodiment as equivalent to the scope of implementation.

[0044] As a preferred embodiment of this example, regardless of whether the first connecting member 31 is a U-shaped thin plate or a U-shaped mesh plate, its side plate can be implemented as a corrugated plate, an arc plate or a corner plate.

[0045] This embodiment provides two implementation methods for the second connector 32:

[0046] The second connector 32 is a tie bar, and its two ends are respectively tied to the ribs 21 on both sides of the groove 22 at that position.

[0047] The second connector 32 is a tie plate, and the two ends of the tie plate are respectively tied to the ribs 21 on both sides of the groove 22 at this position.

[0048] Regardless of whether the second connector 32 is a tie bar or a tie plate, or the first connector 31 is a U-shaped thin plate or a U-shaped mesh plate, the second connector 32 can pass through or span across the first connector 31, thereby achieving the force transmission effect of the middle section of the second connector 32.

[0049] Furthermore, such as Figure 3 and Figure 4 As shown, the second connector 32 passes through the side body 32; or, as... Figure 6 As shown, the second connector 32 spans across the top body 311. Furthermore, the second connector 32 is connected to the top body 311, thereby forming a stiffening effect on the top body 311, increasing the rigidity of the top body 311, and thus reducing the thickness of the top body 311, saving costs.

[0050] Specifically, the second connector 32 includes a bolted section tied to the rib segment 21 and a force-transmitting section that passes through or spans the first connector 31; a protective layer is formed between the bolted section and the top surface of the concrete rib 2. Furthermore, regardless of whether the first connector 31 is a tie bar, a tie plate, or a free combination of both, it should be covered by this embodiment as equivalently implementable. It has various combined implementation methods, as follows:

[0051] First, the force transmission section of the second connector 32 is a whole plate, while the bolting section is a strip plate or a tie bar;

[0052] 2. The force transmission section and the bolting section of the second connector 32 are both tie bars or tie strips.

[0053] Preferably, the anchoring segment can extend downward so that the anchoring segment is embedded in the rib segment 21 and forms a protective layer between the anchoring segment and the top surface of the rib segment 21.

[0054] To facilitate air venting or compaction of the conduit trench 20 during concrete pouring after conduit installation, a through-hole 30 is provided on the top main body 311 to allow passage through the conduit space. Furthermore, this through-hole 30 can be textured or folded to create structural reinforcement.

[0055] The beneficial effects of this embodiment:

[0056] Other composite slabs with concrete ribs 2, used for the top of holes for conduits and reinforcing bars, rely on concrete ribs 2 and internal reinforcing bars for force transmission. However, these ribs have a large top thickness and a small space for conduits, making conduit installation difficult in practical projects and hindering their widespread application. This invention uses a thinner U-shaped groove to connect the concrete ribs 2, creating a conduit space with a higher opening.

[0057] The first connector uses a steel U-shaped groove as a forming mold for the conduit groove 20, which facilitates the forming of the holes in the concrete rib 2.

[0058] The precast portion of the composite slab is used as a simply supported slab during construction. At the conduit location, the positive bending moment is much greater than the negative bending moment (negative bending moments are generally only generated during demolding, hoisting, and transportation). Therefore, the compressive force on the ribs at the conduit location is much greater than the tensile force. The connecting component 3, which combines steel reinforcement and a U-shaped channel, shares the compressive strength with the U-shaped channel, while the tensile strength is borne solely by the steel reinforcement (the U-shaped channel and the two concrete ribs 2 on both sides have strong compressive strength but very weak bonding force, making them almost unable to withstand tensile forces). This saves on the cost of the connecting component 3.

[0059] The second connector is fixed to the top of the U-shaped channel, which is equivalent to acting as a stiffening rib for the thin steel plate at the top of the U-shaped channel. This makes the thin steel plate at the top of the U-shaped channel less prone to out-of-plane buckling when subjected to pressure, allowing the U-shaped channel to use very thin steel plates and saving material costs.

[0060] Example 2:

[0061] Please see Figure 7 and combined Figures 1-6 This embodiment provides a composite slab, including a cast-in-place layer 6, a conduit 5, and a precast portion of the composite slab; the conduit 5 passes through a conduit groove 20 on a concrete rib 2, and the cast-in-place layer 6 is formed on a precast base slab 1, and at least covers the concrete rib 2 and the conduit 5.

[0062] The prefabricated portion of the composite slab includes a prefabricated base plate 1 and a connecting assembly 3. Multiple concrete ribs 2 are formed side-by-side along the span direction on the prefabricated base plate 1. Multiple conduit grooves 20 are formed on the concrete ribs 2, creating continuous rib segments 21 and groove segments 22 through the conduit grooves 20. The connecting assembly 3 includes a first connector 31 and a second connector 32. The first connector 31 includes at least one top body 311 and two side bodies 32. The first connector 31 is located in the conduit groove 20, and the two side bodies 32 are respectively attached to the rib segments 21 on both sides of the conduit groove 20. The top body 311 connects to the two side bodies 32 and forms a conduit space with the conduit groove 20. The second connector 32 passes through or spans the first connector 31, and its two ends are respectively connected to the rib segments 21 on both sides of the conduit groove 20.

[0063] The precast base slab 1 is a prestressed base slab. The concrete ribs 2 on the prestressed base slab can be formed in one step or in stages using concrete forming equipment such as extruders or slipform machines. Alternatively, they can be cast using a casting mold, which is not a limitation.

[0064] The prestressed base plate includes prestressing tendons 11. In a preferred embodiment of this invention, during the forming of the prestressed base plate, the side body 32 of the first connector 31 of the connecting assembly 3 is fixed to the prestressing tendon 11, facilitating the position fixation of the first connector 31. The fixing method can be welding, adhesive bonding, or... Figure 4 The clamping and fixing methods of the middle clamp are not considered as limitations.

[0065] As a structural component, the connecting assembly 3 plays a role in tensile and compressive resistance during the prefabrication, transportation, hoisting, installation, and casting of the composite slab, thereby ensuring space for conduit routing while preventing cracking of the concrete ribs 2. Specifically, the first connecting member 31 is located in the conduit groove 20, with its two side bodies 32 attached to the ribs 21 on both sides of the groove section 22, serving a pressure-bearing function (the bonding of the side bodies 32 to the ribs 21 also achieves tensile resistance); while the two ends of the second connecting member 32 are respectively connected to the ribs 21 on both sides, and the force is transmitted through the middle section to achieve a tensile effect.

[0066] This embodiment provides two implementation methods for the first connector 31:

[0067] 1. The first connecting member 31 is a U-shaped thin plate, the side body 32 is implemented as a side plate, and the top body 311 is implemented as a top plate.

[0068] 2. The first connecting member 31 is a U-shaped mesh panel, the side body 32 is implemented as a mesh panel, and / or the top body 311 is implemented as a mesh panel.

[0069] Furthermore, regardless of whether the first connecting member 31 is a U-shaped thin plate or a U-shaped mesh plate, its top main body 311 can be a whole plate or multiple strips arranged side by side, or a structure formed by multiple rods, ribs and other structures arranged side by side to form a "plate", all of which should be covered by this embodiment as equivalent to the scope of implementation.

[0070] As a preferred embodiment of this example, regardless of whether the first connecting member 31 is a U-shaped thin plate or a U-shaped mesh plate, its side plate can be implemented as a corrugated plate, an arc plate or a corner plate.

[0071] This embodiment provides two implementation methods for the second connector 32:

[0072] The second connector 32 is a tie bar, and its two ends are respectively tied to the ribs 21 on both sides of the groove 22 at that position.

[0073] The second connector 32 is a tie plate, and the two ends of the tie plate are respectively tied to the ribs 21 on both sides of the groove 22 at this position.

[0074] Regardless of whether the second connector 32 is a tie bar or a tie plate, or the first connector 31 is a U-shaped thin plate or a U-shaped mesh plate, the second connector 32 can pass through or span across the first connector 31, thereby achieving the force transmission effect of the middle section of the second connector 32.

[0075] Furthermore, the second connector 32 passes through the side body 32; or, the second connector 32 spans across the top body 311. Even further, the second connector 32 is connected to the top body 311, thereby providing a reinforcing effect on the top body 311, increasing its rigidity, and consequently reducing its thickness, thus saving costs.

[0076] Specifically, the second connector 32 includes a bolted section tied to the rib segment 21 and a force-transmitting section that passes through or spans the first connector 31; a protective layer is formed between the bolted section and the top surface of the concrete rib 2. Furthermore, regardless of whether the first connector 31 is a tie bar, a tie plate, or a free combination of both, it should be covered by this embodiment as equivalently implementable. It has various combined implementation methods, as follows:

[0077] First, the force transmission section of the second connector 32 is a whole plate, while the bolting section is a strip plate or a tie bar;

[0078] 2. The force transmission section and the bolting section of the second connector 32 are both tie bars or tie strips.

[0079] Preferably, the anchoring segment can extend downward so that the anchoring segment is embedded in the rib segment 21 and forms a protective layer between the anchoring segment and the top surface of the rib segment 21.

[0080] To facilitate air venting or compaction of the conduit trench 20 during concrete pouring after conduit installation, a through-hole 30 is provided on the top main body 311 to allow passage through the conduit space. Furthermore, this through-hole 30 can be textured or folded to create structural reinforcement.

[0081] The beneficial effects of this embodiment:

[0082] Other composite slabs with concrete ribs 2, used for the top of holes for conduits and reinforcing bars, rely on concrete ribs 2 and internal reinforcing bars for force transmission. However, these ribs have a large top thickness and a small space for conduits, making conduit installation difficult in practical projects and hindering their widespread application. This invention uses a thinner U-shaped groove to connect the concrete ribs 2, creating a conduit space with a higher opening.

[0083] The first connector uses a steel U-shaped groove as a forming mold for the conduit groove 20, which facilitates the forming of the holes in the concrete rib 2.

[0084] The precast portion of the composite slab is used as a simply supported slab during construction. At the conduit location, the positive bending moment is much greater than the negative bending moment (negative bending moments are generally only generated during demolding, hoisting, and transportation). Therefore, the compressive force on the ribs at the conduit location is much greater than the tensile force. The connecting component 3, which combines steel reinforcement and a U-shaped channel, shares the compressive strength with the U-shaped channel, while the tensile strength is borne solely by the steel reinforcement (the U-shaped channel and the two concrete ribs 2 on both sides have strong compressive strength but very weak bonding force, making them almost unable to withstand tensile forces). This saves on the cost of the connecting component 3.

[0085] The second connector is fixed to the top of the U-shaped channel, which is equivalent to acting as a stiffening rib for the thin steel plate at the top of the U-shaped channel. This makes the thin steel plate at the top of the U-shaped channel less prone to out-of-plane buckling when subjected to pressure, allowing the U-shaped channel to use very thin steel plates and saving material costs.

[0086] Furthermore, the present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. The prefabricated portion of the composite slab, characterized in that, include: A precast base slab, wherein concrete ribs are formed along the span direction on the precast base slab, and multiple conduit grooves are opened on the concrete ribs, and the concrete ribs form continuous rib segments and groove segments through the conduit grooves; A connecting assembly includes a first connector and a second connector; the first connector includes a top body and two side bodies, the first connector is disposed in the conduit groove, the two side bodies are respectively attached to the ribs on both sides of the conduit groove, the top body is connected to the two side bodies and forms a conduit space with the conduit groove; the second connector passes through or spans the first connector and its two ends are respectively connected to the ribs on both sides of the conduit groove.

2. The prefabricated portion of the composite slab as described in claim 1, characterized in that: The first connector is a U-shaped thin plate, the side body is implemented as a side plate, and the top body is implemented as a top plate.

3. The prefabricated portion of the composite slab as described in claim 2, characterized in that: The side panel and / or the top panel are mesh panels.

4. The prefabricated portion of the composite slab as described in claim 2 or 3, characterized in that: The second connector is a tie bar or tie plate, which is disposed through or across the first connector.

5. The prefabricated portion of the composite slab as described in claim 4, characterized in that: The second connector passes through the side body; or the second connector spans across the top body.

6. The prefabricated portion of the composite slab as described in claim 5, characterized in that: The second connector is connected to the top body.

7. The prefabricated portion of the composite slab as described in claim 5, characterized in that: The second connector includes a bolted section tied to the rib segment and a force-transmitting section that passes through or spans the first connector; a protective layer is formed between the bolted section and the top surface of the concrete rib.

8. The prefabricated portion of the composite slab as described in claim 2 or 3, characterized in that: The side plate is implemented as a corrugated plate, an arc plate, or a corner plate.

9. The prefabricated portion of the composite slab as described in claim 1, characterized in that: The top main body has a through opening that passes through the space of the cable conduit.

10. A composite plate, characterized in that, It includes a cast-in-place layer, conduits, and a precast portion of the composite slab as described in any one of claims 1 to 9; the conduits pass through the conduit grooves on the concrete ribs, and the cast-in-place layer is formed on the precast base slab and at least covers the concrete ribs and the conduits.

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