A self-supporting laminated board

Abstract

The utility model discloses a kind of free support laminated boards, comprising: prefabricated bottom plate;Internal reinforcing assembly, including transverse reinforcement and longitudinal reinforcement, transverse reinforcement is distributed side by side along the length direction of prefabricated bottom plate, longitudinal reinforcement is distributed side by side along the width direction of prefabricated bottom plate;Steel bar truss, including lower chord steel bar, upper chord steel bar and web steel bar;External reinforcing assembly, located above prefabricated bottom plate, including first reinforcing strip distributed side by side along the width direction of prefabricated bottom plate and extend along the length direction of prefabricated bottom plate, first reinforcing strip and longitudinal reinforcement one-to-one corresponding and detachably connected to form first closed loop frame.The free support laminated board is formed first closed loop frame by longitudinal reinforcement through prefabricated bottom plate and the second reinforcing strip combination located above prefabricated bottom plate, so that cast-in-place layer formed after pouring concrete slurry on prefabricated bottom plate can be fixedly connected with the second reinforcing strip, the shear resistance, bending strength and stiffness of cast-in-place layer are enhanced, which helps to improve the overall structural strength of building.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated components, and in particular to a supportless composite slab. Background Technology

[0002] Self-supporting composite slabs are a new type of concrete floor slab component used in building construction. Their core feature is that through special design, no additional supports are needed during the construction phase. They replace traditional support systems by strengthening the load-bearing capacity of the precast base slab itself, and their structural design emphasizes the mechanical performance of self-supporting components. With the promotion of prefabricated buildings, self-supporting composite slabs are becoming one of the mainstream choices for floor slab systems due to their high efficiency and economy.

[0003] Most of the existing supportless composite panels have structures like... Figure 1 and Figure 2 As shown, the precast base slab includes a rectangular plate structure. The precast base slab is fixedly perforated with transverse steel bars arranged side by side along its length and longitudinal steel bars arranged side by side along its width. A steel truss extending along its length and arranged side by side along its width is also fixed to the precast base slab. The steel truss includes an upper chord steel bar located directly above the precast base slab, a lower chord steel bar fixed within the precast base slab, and web steel bars fixed between the upper and lower chord steel bars. The steel truss is used to achieve mechanical connection, enhance the shear resistance of the rubber concrete layer, and make the precast base slab and the cast-in-place layer form an integral load-bearing member, thereby improving the overall building's bending strength, stiffness, and crack resistance.

[0004] However, in the aforementioned unsupported composite slabs, the limited number and distribution of steel trusses result in a limited range of influence of the steel trusses on the cast-in-place layer, leaving room for further improvement in the overall structural performance of the composite slabs.

[0005] Therefore, it is necessary to improve the existing supportless composite panels. Utility Model Content

[0006] The purpose of this invention is to overcome the defects in the existing technology and provide a supportless composite board that improves structural strength.

[0007] To achieve the above-mentioned technical effects, the technical solution of this utility model is: a support-free composite panel, comprising:

[0008] The precast base slab is a rectangular slab formed by pouring concrete grout.

[0009] The internal reinforcement component includes transverse and longitudinal steel bars that both penetrate the sidewall of the precast base slab. The transverse steel bars extend along the width direction of the precast base slab and are distributed side by side along the length direction of the precast base slab. The longitudinal steel bars are distributed side by side along the width direction of the precast base slab.

[0010] The steel truss extends along the length direction parallel to the precast base slab and is arranged side by side along the width direction parallel to the precast base slab, including a lower chord steel bar disposed in the precast base slab, an upper chord steel bar located above the precast base slab, and web steel bars located between the lower chord steel bar and the upper chord steel bar;

[0011] An external reinforcement component, located above the precast base plate, includes first reinforcement strips arranged side by side along the width direction of the precast base plate and extending along the length direction of the precast base plate. The first reinforcement strips correspond one-to-one with the longitudinal steel bars and are detachably connected to form a first closed loop frame.

[0012] Preferably, in order to facilitate the detachable connection between the longitudinal reinforcement and the first reinforcing strip, the longitudinal reinforcement includes a straight section extending along the length direction of the precast base plate and a bent section integrally connected to both ends of the straight section and facing each other. The two ends of the first reinforcing strip are respectively detachably connected to the ends of the two bent sections away from the straight section.

[0013] Preferably, to further facilitate the connection between the longitudinal steel bar and the first reinforcing strip, both ends of the first reinforcing strip are respectively inserted into the ends of the two bent sections away from the straight sections, and the axial length of the first reinforcing strip is adjustable.

[0014] Preferably, in order to achieve adjustable axial length of the first reinforcing strip and connection of both ends to the ends of the longitudinal reinforcing bars, the first reinforcing strip includes a first steel bar extending along the length direction parallel to the precast base plate and inserts threaded to both ends of the first steel bar, wherein the inserts are inserted into the end of the corresponding bent section away from the straight section.

[0015] Preferably, in order to facilitate the insertion of the cannula and the bent section, an elastic sleeve is provided on the inner wall of the cannula, and the sleeve is clamped between the inner wall of the cannula and the circumferential outer edge of the bent section.

[0016] Preferably, in order to further increase the structural strength of the cast-in-place layer, the external reinforcement component also includes a second reinforcement component distributed side by side along the length direction of the precast base plate, wherein the second reinforcement component corresponds one-to-one with the transverse steel bars and is combined to form a second closed loop frame.

[0017] Preferably, in order to facilitate fixing the position of the second reinforcement member, both ends of the second reinforcement member are disposed within the prefabricated base plate.

[0018] Preferably, in order to achieve the combination of the second reinforcing member and the transverse steel bar to form a second closed loop frame, the second reinforcing member includes a second reinforcing strip located directly above the transverse steel bar and axially parallel to the transverse steel bar, and the two ends of the transverse steel bar are detachably connected to the second reinforcing strip through two connectors.

[0019] Preferably, in order to facilitate fixing the position of the second reinforcing strip, the connector includes a connecting shaft and connecting sleeves disposed at both ends of the connecting shaft and respectively sleeved on the second reinforcing strip and the transverse steel bar, and locking sleeves are threaded to both ends of the second reinforcing strip.

[0020] Preferably, in order to ensure structural compactness and facilitate the addition of components, the second reinforcing strip abuts against the top of the upper chord steel bar.

[0021] In summary, compared with the prior art, the present invention, a non-supported composite slab, forms a first closed-loop frame by combining the longitudinal steel bars penetrating the precast base slab with the second reinforcing strip located above the precast base slab. This allows the cast-in-place layer formed after the concrete slurry is poured onto the precast base slab to be fixedly connected with the second reinforcing strip, thereby enhancing the shear resistance, bending strength, and stiffness of the cast-in-place layer and helping to improve the overall structural strength of the building. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an existing technology for support-free composite panels;

[0023] Figure 2 yes Figure 1 Schematic diagram of the steel truss structure;

[0024] Figure 3 This is a schematic diagram of the structure of the support-free composite plate in the first embodiment;

[0025] Figure 4 yes Figure 3 An explosion diagram;

[0026] Figure 5 This is a schematic diagram of the structure of the support-free composite plate in the second embodiment;

[0027] Figure 6 yes Figure 5 An explosion diagram;

[0028] In the diagram: 1. Precast base slab; 2. Transverse reinforcement; 3. Longitudinal reinforcement; 31. Straight section; 32. Bending section; 4. Steel truss; 41. Bottom chord reinforcement; 42. Top chord reinforcement; 43. Web reinforcement; 5. First reinforcing bar; 51. First steel bar; 52. Insert pipe; 53. Jacket; 6. Second reinforcing member; 61. Second reinforcing bar; 62. Connecting shaft; 63. Connecting sleeve; 64. Locking sleeve. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0030] First Embodiment

[0031] like Figure 3 and Figure 4 As shown, a support-free composite panel according to the first embodiment of this utility model includes:

[0032] The precast base plate 1 is a rectangular plate formed by pouring concrete grout;

[0033] The internal reinforcement components include transverse steel bars 2 and longitudinal steel bars 3 that both penetrate the sidewall of the precast base slab 1. The transverse steel bars 2 extend along the width direction of the precast base slab 1 and are distributed side by side along the length direction of the precast base slab 1. The longitudinal steel bars 3 are distributed side by side along the width direction of the precast base slab 1.

[0034] The steel truss 4 extends along the length direction parallel to the precast base slab 1 and is arranged side by side along the width direction parallel to the precast base slab 1. It includes a lower chord steel bar 41 set in the precast base slab 1, an upper chord steel bar 42 located above the precast base slab 1, and a web steel bar 43 located between the lower chord steel bar 41 and the upper chord steel bar 42.

[0035] The external reinforcement component is located above the precast base plate 1 and includes first reinforcement strips 5 arranged side by side along the width direction of the precast base plate 1 and extending along the length direction of the precast base plate 1. The first reinforcement strips 5 correspond one-to-one with the longitudinal steel bars 3 and are detachably connected to form a first closed loop frame.

[0036] In this embodiment, the unsupported composite slab, by setting an external reinforcement component on the precast base slab 1, allows the concrete slurry to be poured on top of the precast base slab 1. The concrete slurry connects with the first reinforcing strip 5 in the external reinforcement component and the upper chord steel bar 42 and web steel bar 43 in the steel truss 4. This not only strengthens the structural strength of the cast-in-place layer formed after the intersecting concrete slurry has solidified, enhancing its shear resistance and stiffness, but also allows the first reinforcing strip 5 in the external reinforcement component to be combined and connected with the longitudinal steel bar 3 penetrating the precast base slab 1 to form a first closed loop frame. This ensures that the cast-in-place layer is tightly connected to the precast base slab 1, forming an integral whole and enhancing the structural strength of the building after on-site construction. Furthermore, since the first reinforcing strip 5 and the longitudinal steel bar 3 are detachably connected, in actual use, the first reinforcing strip 5 and the longitudinal steel bar 3 can be separated at the manufacturer to reduce the space occupied by the composite slab, facilitating transportation. After temporary assembly on the construction site, concrete slurry is poured to form a cast-in-place layer, which is then integrated with the precast base slab 1.

[0037] A further improvement is that the longitudinal steel bar 3 includes a straight section 31 extending along the length of the precast base plate 1 and a bent section 32 integrally connected to both ends of the straight section 31 and facing each other. The two ends of the first reinforcing bar 5 are detachably connected to the ends of the two bent sections 32 that are away from the straight section 31.

[0038] After adopting the above structural improvement, the longitudinal steel bar 3 is divided into three sections. The middle section is a straight section 31 that runs through the precast base plate 1. The two ends are bent sections 32 that are positioned opposite each other. The two ends of the bent sections 32 are U-shaped and opposite each other, so that the two ends of the longitudinal steel bar 3 are positioned opposite each other. The first reinforcing strip 5 is long and extends along the length of the precast base plate 1 and is detachably connected to the end of the two bent sections 32 away from the straight section 31, so that the longitudinal steel bar 3 and the first reinforcing strip 5 can be connected to form the first closed loop frame.

[0039] A further improvement is that the two ends of the first reinforcing strip 5 are respectively inserted into the ends of the two bent sections 32 that are away from the straight section 31, and the axial length of the first reinforcing strip 5 is adjustable.

[0040] The first reinforcing strip 5 has an adjustable axial length and its two ends are respectively inserted into the ends of the bent section 32, which facilitates the quick and detachable connection between the first reinforcing strip 5 and the longitudinal steel bar 3.

[0041] A further improvement is that the first reinforcing strip 5 includes a first steel strip 51 extending parallel to the length of the precast base plate 1 and inserts 52 threaded to both ends of the first steel strip 51. The inserts 52 are inserted into the end of the corresponding bent section 32 away from the straight section 31.

[0042] By adopting the above design, by rotating the insertion tube 52 and utilizing the threaded connection between the insertion tube 52 and the first steel bar 51, the axial position of the insertion tube 52 can be changed, thereby realizing the axial length of the first reinforcing bar 5 is adjustable. In conjunction with the insertion tube 52 and the end of the bent section 32 away from the straight section 31, the connection between the first reinforcing bar 5 and the longitudinal steel bar 3 is facilitated.

[0043] A further improvement is that an elastic sleeve 53 is provided on the inner wall of the cannula 52, and the sleeve 53 is clamped between the inner wall of the cannula 52 and the circumferential outer edge of the bent section 32.

[0044] Specifically, the sleeve 53 is a rubber sleeve. With the above design, it is convenient for the insertion tube 52 to drive the sleeve 53 to move. Through the compression deformation of the sleeve 53, it is convenient for the sleeve 53 to be accurately fitted onto the end of the longitudinal steel bar 3. That is, it is convenient for the insertion tube 52 to be sealed and inserted into the end of the bent section 32 away from the straight section 31, so that the first reinforcing strip 5 and the longitudinal steel bar 3 combine to form the first closed loop frame, thereby enhancing the structural strength of the cast-in-place layer and improving the shear resistance, bending strength and stiffness of the building.

[0045] Second Embodiment

[0046] like Figures 3-4As shown, a supportless composite slab according to the second embodiment of the present invention includes: an external reinforcement component further includes a second reinforcement member 6 arranged side by side along the length direction of the precast base slab 1, the second reinforcement member 6 corresponding one-to-one with the transverse steel bars 2 and combined to form a second closed loop frame.

[0047] The second reinforcement 6 helps to further enhance the structural strength of the cast-in-place layer, and the second reinforcement 6 and the transverse steel bars 2 are combined one-to-one to form a second closed loop frame, thereby strengthening the connection strength between the cast-in-place layer and the precast base plate 1.

[0048] A further improvement is that the two ends of the second reinforcement member 6 are set inside the prefabricated base plate 1.

[0049] By setting both ends of the second reinforcement member 6 inside the precast base plate 1, the two ends of the second reinforcement member 6 are pre-connected to the precast base plate 1, preventing the second reinforcement member 6 from detaching from the precast base plate 1.

[0050] A further improvement is that the second reinforcing member 6 includes a second reinforcing strip 61 located directly above the transverse reinforcing bar 2 and axially parallel to the transverse reinforcing bar 2, with both ends of the transverse reinforcing bar 2 being detachably connected to the second reinforcing strip 61 by two connectors.

[0051] Specifically, the connector includes a connecting shaft 62 and connecting sleeves 63 disposed at both ends of the connecting shaft 62 and respectively sleeved on the second reinforcing strip 61 and the transverse steel bar 2. Locking sleeves 64 are threaded to both ends of the second reinforcing strip 61.

[0052] Using the above structure, during production, transverse reinforcing bars 2 and longitudinal reinforcing bars 3 are laid on the casting mold. One of the connecting sleeves 63 is pre-fitted onto the transverse reinforcing bar 2 near its end, so that the connecting sleeve 63 is located inside the casting mold and the connecting shaft 62 remains axially vertical. Then, concrete slurry is injected into the casting mold to form the precast base plate 1, which is then demolded. At this time, the other connecting sleeve 63 on the connecting shaft 62 is located above the precast base plate 1. The second reinforcing strip 61 is inserted through the connecting sleeve 63, and then locking sleeves 64 are screwed into both ends of the second reinforcing strip 61, thus completing the connection between the second reinforcing member 6 and the transverse reinforcing bar 2, so that the second reinforcing member 6 and the transverse reinforcing bar 2 combine to form the second closed-loop frame. It should be noted that the second reinforcing strip 61 can be assembled on site, and the connecting sleeve 63 located on the precast base plate 1 can be easily used as a hook for handling.

[0053] A further improvement is that the second reinforcing strip 61 abuts against the top of the upper chord steel bar 42. This design makes the supportless composite slab structure of this embodiment more compact and facilitates the assembly of the second reinforcing strip 61, avoiding positional collision between the second reinforcing strip 61 and the steel truss 4 during the assembly process, which would affect the assembly of the second reinforcing component 6.

[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A support-free composite panel, characterized in that, include: The precast base slab is a rectangular slab formed by pouring concrete grout. The internal reinforcement component includes transverse and longitudinal steel bars that both penetrate the sidewall of the precast base slab. The transverse steel bars extend along the width direction of the precast base slab and are distributed side by side along the length direction of the precast base slab. The longitudinal steel bars are distributed side by side along the width direction of the precast base slab. The steel truss extends along the length direction parallel to the precast base slab and is arranged side by side along the width direction parallel to the precast base slab, including a lower chord steel bar disposed in the precast base slab, an upper chord steel bar located above the precast base slab, and web steel bars located between the lower chord steel bar and the upper chord steel bar; An external reinforcement component, located above the precast base plate, includes first reinforcement strips arranged side by side along the width direction of the precast base plate and extending along the length direction of the precast base plate. The first reinforcement strips correspond one-to-one with the longitudinal steel bars and are detachably connected to form a first closed loop frame.

2. The support-free composite panel according to claim 1, characterized in that: The longitudinal reinforcing bar includes a straight section extending along the length of the precast base plate and a bent section integrally connected to both ends of the straight section and facing each other. The two ends of the first reinforcing bar are detachably connected to the ends of the two bent sections away from the straight section.

3. The support-free composite panel according to claim 2, characterized in that: The two ends of the first reinforcing strip are respectively inserted into the ends of the two bent sections that are away from the straight sections, and the axial length of the first reinforcing strip is adjustable.

4. The support-free composite panel according to claim 3, characterized in that: The first reinforcing strip includes a first steel bar extending along the length direction parallel to the precast base plate and inserts threaded to both ends of the first steel bar. The inserts are inserted into the end of the corresponding bent section away from the straight section.

5. The support-free composite panel according to claim 4, characterized in that: An elastic sleeve is provided on the inner wall of the cannula, and the sleeve is clamped between the inner wall of the cannula and the circumferential outer edge of the bent section.

6. The supportless composite panel according to claim 1, characterized in that: The external reinforcement component also includes a second reinforcement component arranged side by side along the length of the precast base plate. The second reinforcement component corresponds one-to-one with the transverse steel bars and is combined to form a second closed loop frame.

7. The support-free composite panel according to claim 6, characterized in that: The two ends of the second reinforcement component are disposed within the prefabricated base plate.

8. The support-free composite panel according to claim 7, characterized in that: The second reinforcing member includes a second reinforcing strip located directly above the transverse reinforcing bar and axially parallel to the transverse reinforcing bar. Both ends of the transverse reinforcing bar are detachably connected to the second reinforcing strip via two connectors.

9. The supportless composite panel according to claim 8, characterized in that: The connector includes a connecting shaft and connecting sleeves disposed at both ends of the connecting shaft and respectively sleeved on the second reinforcing strip and the transverse steel bar. Locking sleeves are threaded to both ends of the second reinforcing strip.

10. The supportless composite panel according to claim 8, characterized in that: The second reinforcing strip abuts against the top of the upper chord steel bar.

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