A new multi-toe non-bracing ribbed laminated slab and its mounting structure

Abstract

A novel multi-toe, support-free, ribbed composite slab and its installation structure are disclosed, relating to the field of precast composite slab technology. This invention addresses the shortcomings of existing composite slab structures, such as raising the floor height or requiring scaffolding for low construction efficiency and inconvenience. It includes a precast slab layer with bottom reinforcing bars. The key feature is that the precast slab layer has ribs, with each end of the ribs extending beyond the two ends of the precast slab layer to form toes. The bottom surface of the toes is higher than the bottom surface of the precast slab layer but lower than the plane containing the bottom reinforcing bars. The bottom reinforcing bars extend beyond the two ends of the precast slab layer. By simply lapping the toes onto the precast beam, sufficient rigidity is achieved without the need for scaffolding support. Simultaneously, the bottom surface of the precast slab layer is lowered into the space below the top surface of the precast beam, reducing the horizontal height of the cast-in-place layer and increasing the floor height of the building.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated composite slab technology. Background Technology

[0002] Composite slabs are widely used in residential, commercial, and industrial buildings, especially in prefabricated buildings. Currently, the installation of composite slabs typically involves directly overlapping the bottom ends of the slab onto precast beams, followed by pouring concrete over the slab and beams to form a cast-in-place layer.

[0003] To provide sufficient rigidity for the cast-in-place layer before it cures, existing composite slabs are either designed to be thicker or supported by scaffolding at the bottom. The thicker composite slabs, with their bottom ends overlapping the precast beams, raise the floor height and reduce the floor height. Using temporary scaffolding for support is inefficient and inconvenient to use. Utility Model Content

[0004] In summary, the purpose of this utility model is to address the shortcomings of existing composite slab structures, which result in raised floor heights or require scaffolding support, leading to low construction efficiency and inconvenience. Therefore, this invention proposes a novel multi-toe, support-free, ribbed composite slab and its installation structure.

[0005] To address the technical shortcomings of this utility model, the following technical solution is adopted: A novel multi-toe, support-free, ribbed composite slab includes a precast slab layer with bottom reinforcing bars. The precast slab layer has ribs at both ends, which extend outwards from both ends of the precast slab layer to form toes. The bottom surface of the toes is higher than the bottom surface of the precast slab layer but lower than the plane containing the bottom reinforcing bars. The bottom reinforcing bars extend beyond both ends of the precast slab layer.

[0006] The technical features that further define this utility model include: The precast slab layer has at least two parallel ribs, and each rib extends out of both ends of the precast slab layer to form a toe.

[0007] The plate toe is provided with a through-hole limiting hole.

[0008] The limiting hole is a through hole with a diameter of 20-100mm.

[0009] The width of the plate ribs and plate toes is 60~180mm.

[0010] The stirrups inside the rib extend from the top of the rib at both ends.

[0011] The plate ribs are provided with transverse through-holes for pipelines.

[0012] An installation structure for a novel multi-toed, braced, ribbed composite slab includes the aforementioned novel multi-toed, braced, ribbed composite slab and a precast beam; the toes of the novel multi-toed, braced, ribbed composite slab overlap the precast beam, the bottom surface of the precast slab is lower than the top surface of the precast beam, and the bottom reinforcing bars of the slab extend out and are positioned above the precast beam; a cast-in-place layer is provided above the novel multi-toed, braced, ribbed composite slab and the precast beam.

[0013] The precast beam has limiting steel bars extending from the limiting holes in the toe of the slab.

[0014] The precast beam is provided with horizontal through holes, the opening width of which is greater than 2000mm and the height is greater than 300mm.

[0015] The beneficial effects of this utility model are as follows: By setting ribs and toes on the precast slab layer, and only overlapping the precast beam with the toes, this utility model has sufficient rigidity without the need for scaffolding support. At the same time, it can lower the bottom surface of the precast slab layer into the space below the top surface of the precast beam. That is, most of the precast layer below the plane of the bottom reinforcement of the slab is lowered into the side space of the precast beam. In the case of the same thickness of cast-in-place layer, this utility model reduces the horizontal height of the surface of the cast-in-place layer and increases the floor height of the building. Attached Figure Description

[0016] Figure 1 This is a top view structural diagram of the multi-toed, support-free, ribbed composite plate of this utility model; Figure 2 This is a schematic diagram of the end face structure of the multi-toed, support-free, ribbed composite plate of this utility model; Figure 3 This is a structural schematic diagram of the multi-toed, support-free, ribbed composite slab of this utility model, which is installed on a precast beam in an overlapping manner.

[0017] Figure 4 This is a cross-sectional structural diagram of the composite floor slab constructed according to the present invention. Detailed Implementation

[0018] The structure of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0019] Reference Figures 1 to 4As shown in the figure, this utility model discloses a novel multi-toed, support-free, ribbed composite slab, including a precast slab layer 1, in which bottom reinforcing bars 2 are provided. To ensure that the multi-toed, support-free, ribbed composite slab of this utility model can provide sufficient rigidity before the cast-in-place layer is cured, the precast slab layer 1 is provided with ribs 3. Preferably, the precast slab layer 1 is provided with at least two parallel ribs 3, and both ends of each rib 3 extend out of both ends of the precast slab layer 1 to form toes 31. The bottom surface of the toes 31 is higher than the bottom surface of the precast slab layer 1, but lower than the plane where the bottom reinforcing bars 2 are located. This allows the bottom reinforcing bars 2 to extend from both ends of the precast slab layer 1 above the bottom surface of the toes 31.

[0020] To achieve precise positioning during the installation of the multi-toed, support-free, ribbed composite slab of this utility model, and to reduce construction positioning time and difficulty, a through-hole 32 is provided on the toe 31. The preferred embodiment of the through-hole 32 is a through hole with a diameter of approximately 20-100 mm.

[0021] In the specific implementation process, the width of the plate ribs and plate toes is 60~180mm.

[0022] The stirrups 3 inside the rib 3 extend from the top of the rib 3 at both ends so as to be combined with the cast-in-place layer 4.

[0023] In order to facilitate the pre-embedded conduits in the floor slab to cross the rib 3, the rib 3 is provided with transverse through conduit holes 34.

[0024] This utility model discloses a novel installation structure for a multi-toed, support-free, ribbed composite slab, comprising the aforementioned novel multi-toed, support-free, ribbed composite slab and a precast beam 5. When the novel multi-toed, support-free, ribbed composite slab is assembled with the precast beam 5, only the toes 31 of the novel multi-toed, support-free, ribbed composite slab are overlapped onto the precast beam 5. The bottom surface 11 of the precast slab layer 1 will be lower than the upper surface of the precast beam 5, and the bottom reinforcing bars 2 extend out and are positioned above the precast beam 5. A cast-in-place layer 4 is provided above the novel multi-toed, support-free, ribbed composite slab and the precast beam 5.

[0025] The precast beam 5 has a limiting steel bar 51 extending from the limiting hole 32 in the toe 31.

[0026] The precast beam 5 of this utility model is not only applicable to precast beams without holes, but also to precast beams with holes that are horizontally penetrating through the precast beam, with the opening width of the holes being greater than 2000mm and the height being greater than 300mm.

[0027] In summary, the main features of this utility model compared to existing composite plate structures are as follows: 1. The end of the composite plate has a toe plate; its main function is to support and limit the position of the composite plate. 2. No support required; Rigidity is provided by the ribs 3, and support is provided by the toe 31, so that no scaffolding support is needed under the board; 3. Limiting holes 32 can be added to the toe 31 of the plate to achieve precise positioning as soon as the composite plate is in place, reducing the construction positioning time and difficulty; 4. The bottom reinforcement 2 of the composite slab can extend into the pouring range above the precast beam 5, with only the reinforcement extending in, thus solving the anchorage problem of the bottom reinforcement of the slab; 5. Suitable for floors with large loads; these slabs have high rigidity and large spans, making them suitable for buildings such as basements and factories with increased loads; 6. The bottom reinforcing bar 2 can also be replaced by prestressed steel strand; 7. Openings can be reserved for pipelines to pass through the slab, which facilitates pipeline layout.

Claims

1. A novel multi-toed, braced, ribbed composite slab, comprising a precast slab layer, wherein bottom reinforcing bars are provided in the precast slab layer; characterized in that: The precast slab has ribs, and the two ends of the ribs extend out of the two ends of the precast slab to form toes; the bottom surface of the toes is higher than the bottom surface of the precast slab but lower than the plane where the bottom reinforcement is located; the bottom reinforcement extends out of both ends of the precast slab.

2. The novel multi-toed, support-free, ribbed composite plate according to claim 1, characterized in that: The precast slab layer has at least two parallel ribs, and each rib extends out of both ends of the precast slab layer to form a toe.

3. The novel multi-toed, support-free, ribbed composite plate according to claim 1, characterized in that: The plate toe is provided with a through-hole limiting hole.

4. A novel multi-toed, support-free, ribbed composite plate according to claim 3, characterized in that: The limiting hole is a through hole with a diameter of 20-100mm.

5. A novel multi-toed, support-free, ribbed composite plate according to claim 1, characterized in that: The width of the plate ribs and plate toes is 60~180mm.

6. A novel multi-toed, support-free, ribbed composite plate according to claim 1, characterized in that: The stirrups inside the rib extend from the top of the rib at both ends.

7. A novel multi-toed, support-free, ribbed composite plate according to claim 1, characterized in that: The plate ribs are provided with transverse through-holes for pipelines.

8. A novel installation structure for a multi-toed, support-free, ribbed composite plate, characterized in that... The installation structure includes a novel multi-toed, braced, ribbed composite slab as described in any one of claims 1 to 7 and a precast beam; the toes of the novel multi-toed, braced, ribbed composite slab overlap the precast beam, the bottom surface of the precast slab is lower than the upper surface of the precast beam, and the bottom reinforcing bars of the slab extend out and are positioned above the precast beam; a cast-in-place layer is provided above the novel multi-toed, braced, ribbed composite slab and the precast beam.

9. The installation structure of a novel multi-toed, support-free, ribbed composite plate according to claim 8, characterized in that: The precast beam has limiting steel bars extending from the limiting holes in the toe of the slab.

10. The installation structure of a novel multi-toed, support-free, ribbed composite plate according to claim 8, characterized in that: The precast beam is provided with horizontal through holes, the opening width of which is greater than 2000mm and the height is greater than 300mm.

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