A plate side splicing structure based on a disassembly-free bottom mold hollow floor

Abstract

The utility model discloses a plate side splicing structure based on exempt from to tear down bottom die hollow floor, including bottom die and its above multiple first steel bar truss, multiple first steel bar trusses are connected with bottom die and are spaced distribution, are equipped with multiple interval distribution core mould between adjacent first steel bar trusses, are equipped with multiple second steel bar trusses at the splicing, and second steel bar truss and first steel bar truss are perpendicular, and set up core mould above second steel bar truss, because second steel bar truss provides enough big rigidity, effectively solved the erection of the support of the joint part, reduced the field construction procedure and material, and through steel bar truss realized few supports even exempt from to support, reduced the cost, improved construction efficiency, and the lower chord bar played the role of steel bar lap joint, exempted from to use lap joint steel bar, improved the field construction efficiency, in addition can also act as the role of cushion block, and the top core mould can be placed directly on the top of second steel bar truss, improved construction precision and construction efficiency simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, and in particular to a slab side splicing structure based on a hollow floor slab without dismantling the bottom formwork. Background Technology

[0002] In the current engineering field, cast-in-place hollow core slabs, with their light weight and large span, can effectively meet the needs of multi-story buildings with large column grids, large spans, and large spaces. These floor slabs not only offer flexible spatial application advantages but also provide multiple benefits such as reducing structural weight, increasing floor slab stiffness, improving sound insulation performance, and reducing structural costs, thus finding widespread application in construction projects. With the rapid development of prefabricated buildings, the industry has set higher standards for low-carbon and environmentally friendly construction methods.

[0003] However, cast-in-place hollow core slabs still rely on traditional construction techniques. Due to the complexity of these techniques, on-site construction is cumbersome, especially with the large volume of formwork and reinforcement work, leading to low construction efficiency. This energy-intensive and inefficient traditional model is no longer suitable for the development requirements of prefabricated buildings. To address this issue, the applicant developed a "precast steel truss component without bottom formwork removal and hollow core slab" (patent number: ZL202420284373.5). However, due to limitations in component production, transportation, and construction, the size of this hollow core slab component has an upper limit, requiring on-site splicing. The spliced ​​areas require additional supports due to their cantilevered characteristics. These supports are arranged parallel to the steel truss (i.e., perpendicular to supports in other areas) and are on the same horizontal plane, greatly increasing the difficulty of on-site construction. In addition, someone applied for a "Hollow Core Floor Slab Side-Stiffened Bracing Structure" (Patent No.: 202521340219.6), which provides a solution for side-stiffening of the slab. However, the on-site implementation effect was not good, there were many procedures, and the construction efficiency was not high. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: a slab side splicing structure based on a hollow floor slab without dismantling the bottom formwork, which solves the problem of difficult arrangement of support at the splicing part of the existing floor deck slab.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork includes two spliced ​​hollow floor slabs. Each hollow floor slab includes a bottom formwork and multiple first steel trusses above it. The multiple first steel trusses are connected to the bottom formwork and are distributed parallel to each other at intervals. Between adjacent first steel trusses, multiple core molds are provided at intervals along the length of the first steel trusses. The bottom forms of the two spliced ​​hollow floor slabs are arranged side by side to form a splicing joint, and the first steel trusses are parallel to the splicing joint. At the splicing joint, multiple second steel trusses are provided at intervals along the splicing joint. The second steel trusses are perpendicular to the first steel trusses and are respectively connected to the first steel trusses of the two spliced ​​hollow floor slabs near the splicing joint and the bottom formwork. At the splicing joint, multiple core molds are provided at intervals along the splicing joint, and the core molds overlap two adjacent second steel trusses.

[0006] As an optimization, both the first and second steel trusses include one top chord and two bottom chords arranged in a triangular pattern, with web reinforcement between the top and bottom chords. The overall height of the second steel truss is less than that of the first steel truss. The bottom chord or web reinforcement of the first steel truss is fixedly connected to the bottom formwork. Both ends of the second steel truss extend into the web of the first steel truss of the two spliced ​​hollow floor slabs, and the bottom chord of the second steel truss overlaps the bottom chord of the first steel truss.

[0007] As an optimization, multiple longitudinal and transverse reinforcing bars are intersected between the bottom formwork and the core formwork. The longitudinal reinforcing bars are parallel to the first steel truss, and the transverse reinforcing bars pass through the web of the first steel truss and lap on its lower chord.

[0008] As an optimization, the longitudinal steel bars near the splice joint are fixedly connected to the bottom formwork via connectors.

[0009] As an optimization, the connector is made of plastic or steel-plastic structural material.

[0010] As an optimization, the second steel truss is fixedly connected to the longitudinal steel bars near the splice joint.

[0011] As an optimization, the core mold is a hollow structure or a solid structure made of lightweight materials.

[0012] Compared with the prior art, this application has the following advantages: This utility model, 1. Because the second steel truss provides sufficient rigidity, it effectively solves the problem of erecting supports at the splice joint, reduces on-site construction procedures and materials, and achieves less or even no support at the splice joint through the second steel truss, thereby reducing costs and improving construction efficiency.

[0013] 2. The bottom reinforcement of the second steel truss effectively connects the truss reinforcement of the adjacent hollow floor slab, eliminating the need for lapped reinforcement and improving on-site construction efficiency.

[0014] 3. The top core mold can be placed directly on top of the second steel truss, so that the second steel truss acts as a pad, reducing the need for pads and improving construction accuracy.

[0015] It can be said that the use of the second steel truss at the side splicing of the hollow floor slab without removing the bottom formwork can achieve three goals at once. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram, 1 is the bottom formwork, 2 is the first steel truss, 3 is the core formwork, 4 is the longitudinal steel reinforcement, 5 is the transverse steel reinforcement, 6 is the second steel truss, and 7 is the connector. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] For specific implementation: see [link / reference] Figure 1 , An embodiment of a slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork includes two spliced ​​hollow floor slabs. Each hollow floor slab includes a bottom formwork 1 and multiple first steel trusses 2 above it. The multiple first steel trusses 2 are connected to the bottom formwork 1 and distributed parallel to each other at intervals. Multiple core molds 3 are provided between adjacent first steel trusses 2, spaced apart along the length of the first steel trusses 2. Specifically, the core molds 3 are generally formed by splicing multiple plates to form a hollow structure; alternatively, they can be solid structures integrally molded from lightweight materials through injection molding. The bottom forms 1 of the two spliced ​​hollow floor slabs are arranged side-by-side, forming a splicing seam between them, with the first steel trusses 2 parallel to the splicing seam. Multiple second steel trusses 6 are provided at the splicing seam, spaced apart along the seam. The second steel trusses 6 are perpendicular to the first steel trusses 2 and are respectively connected to the first steel trusses 2 of the two spliced ​​hollow floor slabs near the splicing seam and to the bottom formwork 1.

[0019] Specifically, both the first steel truss 2 and the second steel truss 6 include one top chord and two bottom chords arranged in a triangular pattern. Web reinforcement is provided between the top and bottom chords. The overall height of the second steel truss 6 is less than that of the first steel truss 2. The bottom chord or web reinforcement of the first steel truss 2 is fixedly connected to the bottom formwork 1. Both ends of the second steel truss 6 extend into the web of the first steel truss 2 of the two spliced ​​hollow floor slabs, and the bottom chord of the second steel truss 6 overlaps with the bottom chord of the first steel truss 2. Multiple longitudinal steel bars 4 and transverse steel bars 5 are intersected between the bottom formwork 1 and the core formwork 3. The longitudinal steel bars 4 are parallel to the first steel truss 2, and the transverse steel bars 5 pass through the web of the first steel truss 2 and overlap its bottom chord. The longitudinal steel bar 4 near the splice joint is fixedly connected to the bottom formwork 1 through the connector 7. The connector 7 is made of plastic or steel-plastic structural material and is an existing finished structure. The second steel truss 6 is fixedly connected to the longitudinal steel bar 4 near the splice joint to improve the connection strength at the end of the longitudinal steel bar 4. The connection between the second steel truss 6 and the longitudinal steel bar 4 improves the integrity of the connection at the splice joint and increases the connection strength.

[0020] Because the second steel truss 6 provides sufficient rigidity, it effectively solves the problem of erecting supports at the joints, reducing on-site construction procedures and materials. The steel truss achieves minimal or even no support, lowering costs and improving construction efficiency. The bottom reinforcement of the second steel truss 6 effectively connects the truss reinforcement of adjacent slabs, eliminating the need for lapped reinforcement and further improving on-site construction efficiency.

[0021] Multiple core molds 3 are provided at intervals along the splice joint, and the core molds 3 overlap two adjacent second steel trusses 6. The top core mold 3 can be placed directly on top of the second steel truss 6, so that the second steel truss 6 acts as a pad, reducing the need for pads and improving construction accuracy.

[0022] In practical applications, after two adjacent floor slabs are spliced ​​together, the bottom chord reinforcement of the second steel truss can act as a connection between the transverse reinforcement on both sides. Alternatively, a combination of steel truss and lap splicing can be used to connect the reinforcement of the bottom formwork. This can be flexibly configured according to the specific stress conditions, thereby achieving less or no support and improving construction efficiency.

[0023] In summary, the use of a second steel truss at the side splicing point of a hollow floor slab that does not require dismantling the bottom formwork can achieve three goals at once.

[0024] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. A slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork, comprising two spliced ​​hollow floor slabs, each hollow floor slab including a bottom formwork and a plurality of first steel trusses above it, the plurality of first steel trusses being connected to the bottom formwork and distributed in parallel at intervals, with a plurality of core molds distributed at intervals along the length direction of the first steel trusses between adjacent first steel trusses, the bottom forms of the two spliced ​​hollow floor slabs being arranged side by side to form a splicing joint, and the first steel trusses being parallel to the splicing joint; characterized in that, At the splice joint, there are multiple second steel trusses distributed at intervals along the splice joint. The second steel trusses are perpendicular to the first steel trusses and are respectively connected to the first steel trusses of the two spliced ​​hollow floor slabs near the splice joint and the bottom formwork. At the splice joint, there are multiple core molds distributed at intervals along the splice joint. The core molds overlap on two adjacent second steel trusses.

2. The slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork as described in claim 1, characterized in that, Both the first and second steel trusses include one top chord and two bottom chords arranged in a triangular pattern. Web reinforcement is provided between the top and bottom chords. The overall height of the second steel truss is less than that of the first steel truss. The bottom chord or web reinforcement of the first steel truss is fixedly connected to the bottom formwork. Both ends of the second steel truss extend into the web of the first steel truss of the two spliced ​​hollow floor slabs, and the bottom chord of the second steel truss overlaps the bottom chord of the first steel truss.

3. The slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork as described in claim 1, characterized in that, Multiple longitudinal and transverse steel bars are intersected between the bottom formwork and the core formwork. The longitudinal steel bars are parallel to the first steel truss, and the transverse steel bars pass through the web of the first steel truss and lap on its lower chord.

4. The slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork as described in claim 3, characterized in that, The longitudinal steel bars near the splice joint are fixedly connected to the bottom formwork through connectors.

5. The slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork as described in claim 4, characterized in that, The connector is made of plastic or steel-plastic structural material.

6. The slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork as described in claim 3, characterized in that, The second steel truss is fixedly connected to the longitudinal steel bars near the splice joint.

7. The slab-side splicing structure based on a hollow floor slab without dismantling the bottom formwork as described in claim 1, characterized in that, The core mold is a hollow structure or a solid structure made of lightweight materials.

Images