Fabricated ribbed composite slab structure capable of realizing support-free rapid construction

Abstract

The application discloses a kind of fabricated ribbed composite slab structures that can realize support-free rapid construction, comprising: concrete bottom plate;Steel rib, including two steel rib units arranged symmetrically, steel rib unit includes rib web, first panel and second panel, first panel and second panel are arranged at both ends of rib web, first panel is embedded in concrete bottom plate, a plurality of through holes are arranged on rib web, the through holes of two steel rib units are arranged in staggered manner, and the through hole is a circular hole;Concrete upper flange, for embedding the second panel of the top of steel rib unit.The present application solves the problem of insufficient strength of existing ribbed composite slab in fabricated building, which requires temporary support.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, and in particular to a prefabricated ribbed composite slab structure that enables rapid construction without support. Background Technology

[0002] Ribbed composite slabs are commonly used precast concrete floor slab components in prefabricated buildings. The slab surface has one or more longitudinally continuous raised concrete ribs, and prestressed tendons or ordinary steel bars are usually placed inside the ribs. The concrete ribs not only resist bending, but the steel bars inside the ribs also bear the main tensile load, effectively improving the load-bearing capacity and crack resistance of the floor slab.

[0003] During the construction of prefabricated buildings, the insufficient strength of the ribbed composite slab itself makes it unable to withstand the weight of the newly poured concrete on the surface and the loads of construction personnel and equipment. This results in the need to erect temporary vertical supports under the ribbed composite slab, and the erection and dismantling of temporary supports reduces the construction speed. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated ribbed composite slab structure that enables rapid construction without support, thereby solving the problem that the existing ribbed composite slabs in prefabricated buildings have insufficient strength, which necessitates the erection of temporary supports.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A prefabricated ribbed composite slab structure that enables rapid construction without support, comprising:

[0006] Concrete base slab;

[0007] The steel rib includes two steel rib units arranged symmetrically back to back. Each steel rib unit includes a rib web, a first panel, and a second panel. The first panel and the second panel are arranged at opposite ends of the rib web. The first panel is embedded in a concrete base plate. The rib web is provided with a number of through holes arranged at equal intervals. The through holes of the two steel rib units are staggered and are circular holes.

[0008] The upper concrete flange is used to embed the second panel at the top of the steel rib unit.

[0009] As a further description of the above technical solution:

[0010] A reinforcing steel rib is provided between the two steel rib units. The reinforcing steel rib is corrugated and the arc-shaped protrusion of the reinforcing steel rib contacts the back of the rib web.

[0011] As a further description of the above technical solution:

[0012] The surface of the arc-shaped protrusion is provided with a circular protrusion, which is inserted into the through hole.

[0013] As a further description of the above technical solution:

[0014] The end of the reinforcing steel rib extending out of the steel rib is provided with a lifting hole.

[0015] As a further description of the above technical solution:

[0016] The surface of the reinforcing steel rib at the hoisting hole is provided with annular protrusions.

[0017] As a further description of the above technical solution:

[0018] The inner edge of the annular protrusion is curved.

[0019] As a further description of the above technical solution:

[0020] The second panel is fixedly equipped with transverse reinforcing ribs, which are embedded in the upper flange of the concrete.

[0021] As a further description of the above technical solution:

[0022] A bending rod is provided at the end of the transverse reinforcing rib. The bending rod passes through the connecting hole on the second panel. After passing through the connecting hole, the end of the bending rod is bent to fit the surface of the second panel.

[0023] As a further description of the above technical solution:

[0024] The bending directions of the bent rods at both ends of the transverse stiffener are opposite.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. In this invention, the steel ribs composed of two steel rib units on the concrete base plate together with the upper concrete flange form a T-shaped rib. The first panel on the lower side of the steel rib unit is wrapped inside the concrete of the concrete base plate, and the second panel on the upper side is wrapped inside the concrete of the upper concrete flange. This makes the compression zone wide, the tension zone concentrated, and the moment of inertia of the section large, effectively improving the stiffness of the ribbed composite slab. During construction, it is not necessary to add vertical supports to the bottom of the slab, solving the problem that the existing ribbed composite slabs in prefabricated buildings have insufficient strength and therefore require temporary supports.

[0027] 2. In this invention, the steel rib adopts a double-rib web design to improve the lateral force. The two steel rib units work together to resist the overall bending moment, providing more uniform constraint to the upper flange of the concrete, thereby improving the buckling stability of the upper flange of the concrete. Holes are opened on the web of the steel rib unit, and the through holes of the two steel rib units are staggered to reduce the self-weight, reduce the construction load, and avoid affecting the span without support. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural diagram of a prefabricated ribbed composite slab structure that enables rapid, support-free construction. Figure 1 .

[0030] Figure 2 This is a structural diagram of a prefabricated ribbed composite slab structure that enables rapid, support-free construction. Figure 2 .

[0031] Figure 3 This is a schematic diagram of the steel ribs in a prefabricated ribbed composite slab structure that enables rapid, support-free construction. Figure 1 .

[0032] Figure 4 This is a schematic diagram of the steel ribs in a prefabricated ribbed composite slab structure that enables rapid, support-free construction. Figure 2 .

[0033] Figure 5 This is a structural diagram of a reinforcing steel rib in a prefabricated ribbed composite slab structure that enables rapid construction without support.

[0034] Figure 6 This diagram illustrates the installation of transverse stiffeners in a prefabricated ribbed composite slab structure that enables rapid, support-free construction. Figure 1 .

[0035] Figure 7 This diagram illustrates the installation of transverse stiffeners in a prefabricated ribbed composite slab structure that enables rapid, support-free construction. Figure 2 .

[0036] Legend:

[0037] 1. Concrete base plate; 2. Steel rib unit; 21. Rib web; 211. Through hole; 22. First panel; 23. Second panel; 3. Concrete upper flange; 4. Reinforcing steel rib; 41. Arc-shaped protrusion; 411. Circular protrusion; 42. Lifting circular hole; 421. Annular protrusion; 5. Transverse reinforcing rib; 51. Bending rod. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] Please see Figure 1-7 This invention provides a technical solution: a prefabricated ribbed composite slab structure that enables rapid construction without support, comprising:

[0041] Concrete base slab 1;

[0042] The steel rib includes two steel rib units 2 arranged symmetrically back to back. Each steel rib unit 2 includes a rib web 21, a first panel 22, and a second panel 23. The first panel 22 and the second panel 23 are arranged at both ends of the rib web 21. The first panel 22 is embedded in the concrete base plate 1. The rib web 21 is provided with a number of through holes 211 arranged at equal intervals. The through holes 211 of the two steel rib units 2 are staggered and are circular holes.

[0043] The upper concrete flange 3 is used to embed the second panel 23 on top of the steel rib unit 2.

[0044] Working principle: The steel ribs, composed of two steel rib units 2 on the concrete base slab 1, together with the concrete upper flange 3, form a T-shaped rib. The first panel 22 on the lower side of the steel rib unit 2 is encased in the concrete of the concrete base slab 1, and the second panel 23 on the upper side is encased in the concrete of the concrete upper flange 3. This results in a wide compression zone, a concentrated tension zone, and a large moment of inertia, effectively improving the stiffness of the ribbed composite slab. During construction, no vertical support is required at the bottom of the slab, solving the problem of insufficient strength in existing ribbed composite slabs in prefabricated buildings, which necessitates the erection of temporary supports. The steel ribs adopt a double-ribbed web design to improve lateral stress. The two steel rib units 2 work together to resist the overall bending moment, providing more uniform constraint to the concrete upper flange 3, thus improving the buckling stability of the concrete upper flange 3. Holes are opened in the web 21 of the steel rib unit 2, and the through holes 211 of the two steel rib units 2 are staggered to reduce self-weight, decrease construction load, and avoid affecting the span without support.

[0045] Example 2

[0046] This embodiment further improves upon the above embodiment by providing the following technical solution: a reinforcing steel rib plate 4 is provided between the two steel rib units 2. The reinforcing steel rib plate 4 is corrugated, and the arc-shaped protrusion 41 of the reinforcing steel rib plate 4 contacts the back of the rib web plate 21. A circular protrusion 411 is provided on the surface of the arc-shaped protrusion 41. The circular protrusion 411 is inserted into the through hole 211, and the circular protrusion 411 can be welded and fixed to the rib web plate 21.

[0047] The reinforcement of the steel rib plate 4 can, on the one hand, control the spacing between the two steel rib units 2 during the processing of the ribbed composite plate, which facilitates the precise alignment and coordination between the steel rib and the concrete base plate 1. On the other hand, when the span requirement for unsupported construction is small, the corrugated reinforcement steel rib plate 4 supports the double-rib web plate and improves the shear resistance of the steel rib.

[0048] Example 3

[0049] This embodiment further improves upon the above embodiment by providing the following technical solution: a lifting hole 42 is provided at the end of the reinforcing steel rib 4 extending out of the rib. On the one hand, the end of the reinforcing steel rib 4 extends into the cast-in-place layer of the support beam, forming a fixed end or semi-rigid node, further improving the feasibility of support-free installation. On the other hand, the lifting hole 42 can be used to lift the ribbed composite plate.

[0050] The surface of the reinforcing steel rib 4 at the lifting hole 42 is provided with annular protrusions 421. The annular protrusions 421, which are fixed by welding, improve the deformation resistance of the lifting hole 42 and prevent deformation and cracking of the ribbed composite plate during the lifting process.

[0051] Preferably, the inner edge of the annular protrusion 421 is curved, which facilitates hoisting and reduces wear on the hoisting equipment during the hoisting process.

[0052] Example 4

[0053] This embodiment further improves upon the above embodiment by providing the following technical solution: A transverse reinforcing rib 5 is fixedly installed on the second panel 23, and the transverse reinforcing rib 5 is embedded within the concrete upper flange 3. When the two steel rib units 2 are fixed to the concrete upper flange 3, they form a whole through the transverse reinforcing rib 5, improving the bonding effect with the concrete in the concrete upper flange 3 and further enhancing the rigidity of the ribbed composite plate.

[0054] A bending rod 51 is provided at the end of the transverse reinforcing rib 5. The bending rod 51 passes through the connecting hole 231 on the second panel 23. After passing through the connecting hole 231, the end of the bending rod 51 is bent to fit against the surface of the second panel 23, and the bending directions of the bending rods 51 at both ends of the transverse reinforcing rib 5 are opposite. The transverse reinforcing rib 5 and the second panel 23 are connected by bending the ends after insertion, which is simple and reliable.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated ribbed composite slab structure that enables rapid, support-free construction, characterized in that: include: Concrete base slab; The steel rib includes two steel rib units arranged symmetrically back to back. Each steel rib unit includes a rib web, a first panel, and a second panel. The first panel and the second panel are arranged at opposite ends of the rib web. The first panel is embedded in the concrete base plate. The rib web is provided with a plurality of through holes arranged at equal intervals. The through holes of the two steel rib units are staggered. The through holes are circular holes. The upper concrete flange is used to embed the second panel at the top of the steel rib unit.

2. The prefabricated ribbed composite slab structure capable of rapid, support-free construction according to claim 1, characterized in that, A reinforcing steel rib plate is provided between the two steel rib units. The reinforcing steel rib plate is corrugated, and the arc-shaped protrusion of the reinforcing steel rib plate contacts the back of the rib web plate.

3. The prefabricated ribbed composite slab structure capable of rapid, support-free construction according to claim 2, characterized in that, The surface of the arc-shaped protrusion is provided with a circular protrusion, which is inserted into the through hole.

4. The prefabricated ribbed composite slab structure capable of rapid, support-free construction according to claim 2, characterized in that, The end of the reinforcing steel rib extending out of the steel rib is provided with a lifting hole.

5. A prefabricated ribbed composite slab structure capable of rapid, support-free construction according to claim 4, characterized in that, The surface of the reinforcing steel rib at the hoisting hole is provided with annular protrusions.

6. A prefabricated ribbed composite slab structure capable of rapid, support-free construction according to claim 5, characterized in that, The inner edge of the annular protrusion is curved.

7. A prefabricated ribbed composite slab structure capable of rapid, support-free construction according to claim 1, characterized in that, A transverse reinforcing rib is fixedly installed on the second panel, and the transverse reinforcing rib is embedded in the upper flange of the concrete.

8. A prefabricated ribbed composite slab structure capable of rapid, support-free construction according to claim 7, characterized in that, The transverse reinforcing rib is provided with a bending rod at its end. The bending rod passes through the connecting hole on the second panel and the end of the bending rod is bent to fit the surface of the second panel after passing through the connecting hole.

9. A prefabricated ribbed composite slab structure capable of rapid, support-free construction according to claim 8, characterized in that, The bending directions of the bending rods at both ends of the transverse reinforcing rib are opposite.

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