Laminated slab structure suitable for large-span factory building
By setting up encrypted bottom bars and steel bar truss connections in the stacked plate structure of a large span factory, the problem of insufficient rigidity of the stacked plate is solved, and the rigidity demand and construction efficiency of the large span factory are improved.
Patent Information
- Application Number
- CN202422627823.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the construction of large-span factory buildings, the stiffness of the existing overlapping plates is difficult to meet the demand, especially the two sides of the intermediate prefabricated base plate cannot overlap with the frame beam steel bars, resulting in insufficient overall stiffness.
A stacked plate structure suitable for large-span factory buildings is designed. By setting up multiple prefabricated bottom plate segments in the prefabricated bottom plate unit, and enlarging the bottom bar spacing in the middle bar segment, increasing the connection of steel bar trusses, forming a grid-like distribution, improving the overall stiffness, and setting up a fixed connection between steel bar mesh and steel bar trusses in the cast-in-place layer.
The overall stiffness of the prefabricated base plate unit in the long-term direction is improved, meeting the rigidity requirements of large-span factories, and reducing construction difficulty and cost.
Smart Images
Figure CN223281526U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of large-span factory building construction, and more specifically, to a composite plate structure suitable for large-span factory buildings. Background Art
[0002] Prefabricated buildings are increasingly being used in the construction industry due to their numerous advantages, including high product quality, high construction efficiency, and environmental friendliness. Composite slabs are a key component in this area. Currently, composite slabs are primarily used in residential building construction. They consist of multiple prefabricated base plates, which are then joined together, reinforced with steel, and then poured with a layer of post-cast concrete. However, residential buildings typically have small structural spans, requiring fewer composite slabs. Factory construction, on the other hand, requires a large number of composite slabs due to the large scale and span of the buildings. The central prefabricated base plate cannot be spliced to the frame beam reinforcement on either side, making its rigidity insufficient for the requirements of large-span factories. Utility Model Content
[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages to be described below.
[0004] In order to achieve these purposes and other advantages according to the present invention, a composite slab structure suitable for large-span factory buildings is provided, in which multiple cast-in-situ beams in the factory building are vertically staggered in the horizontal plane to form multiple installation spaces, including: multiple prefabricated bottom plate units and cast-in-situ layers cast on the prefabricated bottom plate units; one prefabricated bottom plate unit is correspondingly installed in one of the installation spaces; the prefabricated bottom plate unit includes multiple prefabricated bottom plate strip segments arranged along the length direction of the factory building, the prefabricated bottom plate strip segments include a composite slab body and bottom reinforcement distributed in a grid shape in the composite slab body, multiple steel trusses are provided on the bottom reinforcement, and the upper part of the steel trusses extends into the cast-in-situ layer; the bottom reinforcements extend out of the four sides of the prefabricated bottom plate strip segments, and extend into the steel cage of the corresponding cast-in-situ beam or overlap with the bottom reinforcement of the adjacent prefabricated bottom plate strip segments. In one of the prefabricated floor units, the spacing of the bottom ribs arranged in the middle prefabricated floor strip segment along the length direction of the factory building is smaller than the spacing of the bottom ribs arranged in the two sides prefabricated floor strip segments along the length direction of the factory building.
[0005] Preferably, the spacing of the bottom ribs arranged in the prefabricated bottom slat segments on both sides along the length direction of the factory building is twice the spacing of the bottom ribs arranged in the prefabricated bottom slat segments in the middle along the length direction of the factory building.
[0006] Preferably, the bottom reinforcement includes a plurality of longitudinal bottom reinforcements and transverse bottom reinforcements respectively arranged along the length direction and width direction of the factory building, and the diameter of the longitudinal bottom reinforcement is greater than the diameter of the transverse bottom reinforcement.
[0007] Preferably, the prefabricated floor strip section is divided into a plurality of prefabricated floor panels along the width direction of the factory building, and two adjacent prefabricated floor panels are closely abutted.
[0008] Preferably, the prefabricated bottom plate is further provided with a plurality of reinforcing ribs, the arrangement positions of the reinforcing ribs correspond to the hoisting points on the prefabricated bottom plate, and the reinforcing ribs are fixedly connected to the corresponding bottom ribs.
[0009] Preferably, a steel mesh is provided in the cast-in-place layer, and the steel mesh is fixedly connected to the steel truss.
[0010] The utility model has at least the following beneficial effects:
[0011] The utility model provides a composite slab structure suitable for large-span factories. The prefabricated bottom plate unit is arranged into multiple prefabricated bottom plate strip segments according to the installation range of the composite slab, and the bottom reinforcement arranged in the middle prefabricated bottom plate strip segment along the length direction of the factory building is densified to improve the overall stiffness of the prefabricated bottom plate unit in the span direction, thereby meeting the stiffness requirements of large-span factories.
[0012] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a structural diagram of the prefabricated floor unit of the present invention;
[0014] Figure 2 This is a structural diagram of the prefabricated base plate of the utility model;
[0015] Figure 3 This is the reinforcement diagram of the prefabricated base plate of the utility model; DETAILED DESCRIPTION
[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.
[0017] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.
[0018] like Figures 1 to 3 As shown, the utility model provides a composite slab structure suitable for a large-span factory building, wherein a plurality of cast-in-situ beams 1 in the factory building are vertically staggered in a horizontal plane to form a plurality of installation spaces, including: a plurality of prefabricated bottom plate units and a cast-in-situ layer cast on the prefabricated bottom plate units; one of the prefabricated bottom plate units is correspondingly installed in one of the installation spaces; the prefabricated bottom plate unit includes a plurality of prefabricated bottom plate strip segments 2 arranged along the length direction of the factory building, the prefabricated bottom plate strip segments 2 include a composite slab body 5 and bottom reinforcement 3 arranged in a grid shape in the composite slab body 5, a plurality of steel trusses 4 are arranged on the bottom reinforcement 3, and the upper part of the steel truss 4 extends into the cast-in-situ layer; the bottom reinforcements extend out of the four sides of the prefabricated bottom plate strip segments 2, and extend into the steel cage of the corresponding cast-in-situ beam or overlap with the bottom reinforcement of the adjacent prefabricated bottom plate strip segments 2. In one of the prefabricated floor units, the spacing of the bottom ribs 3 arranged in the middle prefabricated floor strip segment 21 along the length direction of the factory building is smaller than the spacing of the bottom ribs arranged in the prefabricated floor strip segments 22 on both sides along the length direction of the factory building.
[0019] In this technical solution, refer to Figure 1The four cast-in-place beams enclose one installation space, and the two ends of the cast-in-place beams are fixed to the frame columns in the factory building. A plurality of prefabricated bottom plate segments 2 are provided in one prefabricated bottom plate unit according to the size of the installation space. In this embodiment, three are provided as an example. After the bottom reinforcement between two adjacent prefabricated bottom plate segments 2 is overlapped, additional transverse reinforcement is tied or the bottom reinforcement is bent upward to form a bent portion. The bent portion is connected to the steel truss 4 on the adjacent prefabricated bottom plate segment 2, and a post-cast connection seam is formed when the cast-in-place layer is cast. The steel truss 4 and its connection with the bottom reinforcement 3 adopt the structure conventionally used in prefabricated bottom plates in the prior art. The bottom reinforcement 3 includes a plurality of longitudinal bottom reinforcements 31 and transverse bottom reinforcements 32 respectively arranged along the longitudinal and transverse directions of the factory building, wherein the diameter of the longitudinal bottom reinforcement 31 is larger than the diameter of the transverse bottom reinforcement 32, so as to further improve the overall stiffness of the prefabricated bottom plate unit in the span direction. The spacing d between two adjacent longitudinal bottom bars 31 is the spacing of the bottom bars arranged along the length of the factory building in the precast bottom slat segment 2. Considering that the two sides of the precast bottom slat segment 21 located in the middle cannot be connected to the cast-in-place beam 1, to ensure that its overall strength meets the requirements of a large-span factory building, the bottom bars arranged along the length of the factory building in the precast bottom slat segment 21 located in the middle are increased in density. In other words, the spacing d1 of the bottom bars 3 arranged along the length of the factory building in the precast bottom slat segment 21 located in the middle is smaller than the spacing d2 of the bottom bars arranged along the length of the factory building in the precast bottom slat segments 22 located on both sides, d1 < d2.
[0020] Specifically, the spacing d2 of the bottom ribs 3 arranged in the prefabricated bottom plate segments 22 on both sides along the length direction of the factory building is twice the spacing d1 of the bottom ribs 3 arranged in the prefabricated bottom plate segments 21 in the middle along the length direction of the factory building, d2=2d1.
[0021] In another technical solution, in order to further reduce the difficulty of hoisting construction, the prefabricated bottom plate strip section 2 is divided into multiple prefabricated bottom plates along the width direction of the factory building, and two adjacent prefabricated bottom plates are closely abutted. Figure 1 As shown, one precast floor strip segment 2 is composed of multiple precast floor panels. The bottom reinforcement of any precast floor panel within the same precast floor strip segment 2 does not extend beyond the end face that abuts the adjacent precast floor panel, but only extends beyond the end face that connects to the cast-in-place beam 1 and the adjacent precast floor strip segment 2. The bottom surface of the precast floor panel is the bottom mold surface. Except for the bottom mold surface and the end face that abuts the adjacent precast bottom, the remaining surfaces are made into rough surfaces. When the precast floor panel is prefabricated, the junction box is embedded simultaneously. After each precast floor panel unit is hoisted and laid, the pipeline is installed and embedded in the cast-in-place layer.
[0022] In another technical solution, the prefabricated bottom plate is further provided with a plurality of reinforcing ribs 5. The positions of the reinforcing ribs 5 correspond to the hoisting points on the prefabricated bottom plate, and the reinforcing ribs 5 are fixedly connected to the corresponding bottom ribs 3. The reinforcing ribs 5 are used to strengthen the hoisting points of the prefabricated bottom plate. Usually, when the prefabricated bottom plate is hoisted, the hoisting device is directly connected to the steel truss 4 on it, and the reinforcing ribs are correspondingly provided at the predetermined positions for connection with the hoisting device. Preferably, Figure 3 As shown, in this embodiment, two reinforcing ribs 5 are provided corresponding to one hanging point, and are symmetrically arranged on both sides of the hanging point.
[0023] In another technical solution, a steel mesh is provided in the cast-in-place layer and fixedly connected to the steel truss. The steel bars are tied according to the steel spacing control line above the prefabricated bottom unit, and the truss steel bars 5 are used as a saddle for the steel mesh.
[0024] During construction, the composite slab structure, suitable for large-span factory buildings, utilizes a full-height, interlocking scaffolding support system. Prior to erecting the vertical poles, support point locations are determined according to the detailed design and construction drawings, based on the wall edges. The formwork for the cast-in-place beams 1 is first erected, followed by the support frame for the composite slab structure. Interlocking crossbars connect the support frame and beam formwork. The rebar for the cast-in-place beams 1 is then tied, with the waist and face reinforcements on the side overlapping the precast floor slab segments 2 first positioned at the bottom. Once the precast floor slab segments 2 are in place, the waist and face reinforcements are then installed. Each precast floor slab is then hoisted and lowered sequentially. After the precast floor slabs are hoisted, a leveling gauge is set up to mark a 1m elevation. A tower ruler is used to check the elevation of the precast floor slab's top surface. The inspection locations are 100mm on either side of the corners and at the center of the precast floor slab. Any discrepancies in the top surface elevation are adjusted by adjusting the adjustable supports at the bottom of the precast floor slab. Then, pipelines are laid, avoiding the need for pre-buried, clustered pipelines. Smaller diameter pipelines are used, with dispersed perforations. Rebar is tied according to the rebar spacing control lines above the precast baseplate, ensuring that the rebar overlap and spacing meet design requirements. Finally, concrete is poured to form the cast-in-place layer.
[0025] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.
Claims
1. A composite slab structure suitable for a large-span factory building, wherein a plurality of cast-in-situ beams in the factory building are vertically staggered in a horizontal plane to form a plurality of installation spaces, characterized in that: include: A plurality of prefabricated floor slab units and a cast-in-place layer cast on the prefabricated floor slab units; one of the prefabricated floor slab units is correspondingly installed in one of the installation spaces; the prefabricated floor slab unit comprises a plurality of prefabricated floor slab strip segments arranged along the length direction of the factory building, the prefabricated floor slab strip segments comprise a composite plate body and bottom bars arranged in a grid pattern in the composite plate body, a plurality of steel bar trusses are arranged on the bottom bars, and the upper parts of the steel bar trusses extend into the cast-in-place layer; the bottom bars extend out from the four sides of the prefabricated floor slab segments respectively, and extend into the corresponding steel bar cage of the cast-in-place beam or overlap with the bottom bars of the adjacent prefabricated floor slab segments; in one of the prefabricated floor slab units, the spacing of the bottom bars arranged along the length direction of the factory building in the middle prefabricated floor slab strip segment is smaller than the spacing of the bottom bars arranged along the length direction of the factory building in the prefabricated floor slab strip segments located on both sides.
2. The composite plate structure suitable for large-span factory buildings according to claim 1, characterized in that: The spacing of the bottom reinforcements arranged in the prefabricated bottom plate strip sections on both sides along the length direction of the factory building is twice the spacing of the bottom reinforcements arranged in the prefabricated bottom plate strip sections in the middle along the length direction of the factory building.
3. The composite plate structure suitable for large-span factory buildings according to claim 1, characterized in that: The bottom reinforcement includes a plurality of longitudinal bottom reinforcements and transverse bottom reinforcements respectively arranged along the length direction and width direction of the factory building, and the diameter of the longitudinal bottom reinforcement is greater than the diameter of the transverse bottom reinforcement.
4. The composite plate structure suitable for large-span factory buildings according to claim 1, characterized in that: The prefabricated bottom plate strip section is divided into a plurality of prefabricated bottom plates along the width direction of the factory building, and two adjacent prefabricated bottom plates are closely abutted.
5. The composite plate structure suitable for large-span factory buildings according to claim 4, characterized in that: The prefabricated bottom plate is further provided with a plurality of reinforcing ribs, the arrangement positions of the reinforcing ribs correspond to the hoisting points on the prefabricated bottom plate, and the reinforcing ribs are fixedly connected to the corresponding bottom ribs.
6. The composite plate structure suitable for large-span factory buildings according to claim 1, characterized in that: A steel mesh is provided in the cast-in-place layer, and the steel mesh is fixedly connected to the steel truss.