Prefabricated one-way single rib beam bottom plate and assembly type hollow floor structure

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a prefabricated one-way single-rib beam bottom plate and an assembly type hollow floor structure, which comprise a base plate, a prefabricated beam is longitudinally arranged on the base plate, and the prefabricated beam and the base plate are integrally formed by pouring concrete; a plurality of X-direction steel bars and a plurality of Y-direction steel bars are embedded in the base plate, and the two ends of each X-direction steel bar extend out of the base plate and are bent upwards. A plurality of precast beam stirrups are pre-buried in the precast beam, the upper ends of the precast beam stirrups extend upwards out of the precast beam and are bent inwards to form openings, precast beam bottom bars are fixed to the bottoms of the precast beam stirrups, and precast beam waist bars are fixed to the waists of the precast beam stirrups; the problems that in the prior art, the structure is complex, the prefabrication standardization degree is low, on-site assembly is troublesome, and construction efficiency is low are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and specifically relates to a prefabricated unidirectional single-rib beam bottom plate and an assembled hollow floor structure. Background Art

[0002] The hollow floor slab is a cast-in-place reinforced concrete hollow floor slab, also called a cast-in-place beamless hollow floor slab. The cast-in-place reinforced concrete hollow floor slab is a new type of floor slab system after the beamless floor slab and the dense-rib floor slab. When the hollow floor slab is cast in situ, a core mold product is required to form a cavity in the floor slab to meet the hollow requirements of the hollow floor slab. It can save building materials while retaining the structural rigidity to the greatest extent. It also has the advantages of reducing the structural floor height, energy saving and noise reduction, and realizing the free separation of the floor slab walls, which can better reflect the economy and applicability of the building.

[0003] Existing hollow floor slabs are mainly divided into three types: fully cast-in-place, fully assembled, and partially prefabricated. Among them, the partially prefabricated type has the advantages of good integrity and small on-site pouring volume and is widely used. The invention patent with patent number CN109339323A discloses an assembled integral hollow floor slab structure system, which consists of a prefabricated cross-rib beam unit, a detachable prefabricated bottom plate, a cast-in-place top plate, and a cast-in-place connecting rib beam. The side rib width of the prefabricated cross-rib beam unit is relatively small, forming a side rib plate with a vertical steel mesh as the side formwork of the cast-in-place connecting rib beam; the lower part of the prefabricated cross-rib beam unit is pre-embedded with a full-length vertical and horizontal horizontal steel mesh, which extends out of the narrow rib plate of the side area, and the detachable prefabricated bottom plate is connected by a The installation is carried out by an installation anchoring device consisting of a top plate bottom formwork, anchor screws and fixing nuts. Adjacent prefabricated cross-rib beam units are connected by cast-in-place connecting rib beams. The cast-in-place top plate and the cast-in-place connecting rib beams are integrally formed by cast-in-place and are connected with the prefabricated cross-rib beam units, the detachable prefabricated bottom plate and the load-bearing structure to form a hollow floor system. The prefabricated cross-rib beam units and the detachable prefabricated bottom plate of the hollow floor have complex structures, the degree of standardization of factory prefabrication is low, and the assembly on the construction site is troublesome and the construction efficiency is low. Utility Model Content

[0004] The utility model aims to provide a prefabricated unidirectional single-rib beam bottom plate and assembled hollow floor structure to solve the problems of complex structure, low prefabrication standardization, troublesome on-site assembly and low construction efficiency in the prior art.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A prefabricated unidirectional single-rib beam bottom plate comprises a base plate, a prefabricated beam is longitudinally arranged on the base plate, and the prefabricated beam and the base plate are integrally formed by pouring concrete; a plurality of X-direction steel bars and a plurality of Y-direction steel bars are pre-embedded in the base plate, and both ends of the X-direction steel bars extend to the outside of the base plate and are bent upward; a plurality of prefabricated beam stirrups are pre-embedded in the prefabricated beam, and the upper ends of the prefabricated beam stirrups extend upward to the outside of the prefabricated beam and are bent inward to form an opening, a prefabricated beam bottom reinforcement is fixed to the bottom of the prefabricated beam stirrups, and a prefabricated beam waist reinforcement is fixed to the waist of the prefabricated beam stirrups.

[0007] Furthermore, the prefabricated beam is provided in one or two pieces.

[0008] A prefabricated hollow floor structure comprises a floor bottom plate, which comprises a plurality of the above-mentioned prefabricated one-way single-rib beam bottom plates, wherein the plurality of prefabricated one-way single-rib beam bottom plates are spliced ​​with each other; a gap is left between two adjacent prefabricated one-way single-rib beam bottom plates, a cast-in-place beam is arranged in the gap, and cast-in-place beam reinforcement is arranged in the cast-in-place beam; core molds are arranged between adjacent prefabricated beams and cast-in-place beams, a floor panel is arranged on the top of the core mold, and panel reinforcement is arranged in the floor panel; the floor panel and the cast-in-place beam are integrally formed by pouring concrete on site.

[0009] Furthermore, the extended sections of the X-direction steel bars of the two adjacent prefabricated unidirectional single-rib beam bottom plates are staggered and fitted together, and the cast-in-place beam steel bars include cast-in-place beam bottom bars fixed on the extended sections of the X-direction steel bars, a plurality of cast-in-place beam stirrups are fixed on the cast-in-place beam bottom bars, cast-in-place beam waist bars are fixed to the waist of the cast-in-place beam stirrups, and cast-in-place beam top bars are fixed to the top of the cast-in-place beam stirrups.

[0010] Furthermore, the precast beam top reinforcement is fixed to the bending part of the precast beam stirrups by U-shaped stirrups, and the panel steel bars include multiple first transverse steel bars and multiple second transverse steel bars, the first transverse steel bars are fixed to the precast beam stirrups and the cast-in-place beam stirrups, the second transverse steel bars are fixed to the precast beam top reinforcement and the cast-in-place beam top reinforcement, and multiple first longitudinal steel bars and multiple second longitudinal steel bars are fixed to the first transverse steel bars and the second transverse steel bars, respectively.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects:

[0012] The prefabricated one-way single-rib beam bottom plate of the utility model is integrally formed by casting the base plate and the prefabricated beam in the factory, has a simple structure, a higher degree of standardization during factory prefabrication, and does not require assembly at the construction site, thus simplifying the on-site assembly process and effectively improving construction efficiency.

[0013] The utility model discloses an assembled hollow floor slab, in which all prefabricated unidirectional single-rib beam bottom plates are connected by cast-in-place beams, and the floor slab panels and the cast-in-place beams are integrally formed by cast-in-place and connected with the prefabricated unidirectional single-rib beam bottom plates to form a hollow floor slab structure. The hollow floor slab structure is convenient to construct and has a high assembly rate. The ends of the X-direction steel bars of the prefabricated unidirectional single-rib beams extend upward and are buried in the cast-in-place beams, so that the X-direction steel bars have a higher anchoring force, so that the floor slab connection of the hollow floor slab has better crack resistance, thereby improving the integrity and rigidity of the hollow floor slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the prefabricated unidirectional single-rib beam bottom plate of Example 1;

[0015] Figure 2 This is a schematic diagram of the structure of the assembled hollow floor of Example 1;

[0016] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0017] Figure 4 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0018] Figure 5 Schematic diagram of the splicing of the floor slab of the first embodiment. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods:

[0020] The reference numerals in the drawings of the specification include:

[0021] Base plate 1, X-direction steel bars 11, Y-direction steel bars 12;

[0022] Precast beam 2, precast beam stirrups 21, precast beam bottom reinforcement 22, precast beam waist reinforcement 23, precast beam top reinforcement 24;

[0023] Floor slab 3;

[0024] Cast-in-place beam 4, cast-in-place beam bottom reinforcement 41, cast-in-place beam stirrups 42, cast-in-place beam waist reinforcement 43, cast-in-place beam top reinforcement 44;

[0025] Core mold 5;

[0026] Floor panel 6, first transverse reinforcement 61, second transverse reinforcement 62, first longitudinal reinforcement 63, second longitudinal reinforcement 64;

[0027] Load-bearing structure7. Embodiment 1

[0028] like Figure 1As shown, a prefabricated unidirectional single-rib beam bottom plate comprises a base plate 1, on which a prefabricated beam 2 is longitudinally arranged, and the prefabricated beam 2 and the base plate 1 are integrally formed by pouring concrete; a plurality of X-direction steel bars 11 are pre-embedded in the base plate 1, and both ends of the X-direction steel bars 11 extend to the outside of the base plate 1 and bend upward, and a plurality of Y-direction steel bars 12 are fixed on the X-direction steel bars 11; a plurality of prefabricated beam stirrups 21 are pre-embedded in the prefabricated beam 2, and the upper ends of the prefabricated beam stirrups 21 extend upward to the outside of the prefabricated beam 2 and bend inward to form an opening, a prefabricated beam bottom bar 22 is fixed to the bottom of the prefabricated beam stirrups 21, and a prefabricated beam waist bar 23 is fixed to the waist of the prefabricated beam stirrups 21; only one prefabricated beam 2 is arranged on the base plate 1, so that the size of each prefabricated unidirectional single-rib beam bottom plate is small, which can greatly reduce the dead weight and facilitate transportation; and the structure of this kind of prefabricated unidirectional single-rib beam is simple, and the degree of standardization during factory prefabrication is high, so as to ensure the quality of the hollow floor obtained by subsequent construction.

[0029] like Figure 2-5 As shown, an assembled hollow floor structure includes a floor bottom plate 3, and the floor bottom plate 3 includes a plurality of prefabricated one-way single-rib beam bottom plates described in this embodiment, the plurality of prefabricated one-way single-rib beam bottom plates are spliced ​​with each other, and the extension sections of the X-direction steel bars 11 in two adjacent base plates 1 are staggered and fitted together; a gap is left between the base plates 1 of two adjacent prefabricated one-way single-rib beam bottom plates, a cast-in-place beam 4 is arranged in the gap, and cast-in-place beam 4 is provided with cast-in-place beam 4 steel bars, and the cast-in-place beam 4 steel bars include cast-in-place beam bottom bars 41 fixed on the extension sections of the X-direction steel bars 11, a plurality of cast-in-place beam stirrups 42 are fixed on the cast-in-place beam bottom bars 41, a cast-in-place beam waist bar 43 is fixed to the waist of the cast-in-place beam stirrups 42, and a cast-in-place beam top bar 44 is fixed to the top of the cast-in-place beam stirrups 42; the adjacent prefabricated beams A core mold 5 is fixed between 2 and the cast-in-place beam 4, a floor panel 6 is arranged on the top of the core mold 5, and panel steel bars are arranged in the floor panel 6. The bending part of the upper end of the precast beam stirrup 21 is fixed with the precast beam top reinforcement 24 through the U-shaped stirrup, and the panel steel bars include a plurality of first transverse steel bars 61 and a plurality of second transverse steel bars 62. The first transverse steel bars 61 are fixed on the precast beam stirrup 21 and the cast-in-place beam stirrup 42, and the second transverse steel bars 62 are fixed on the precast beam top reinforcement 24 and the cast-in-place beam top reinforcement 44. A plurality of first longitudinal steel bars 63 and a plurality of second longitudinal steel bars 64 are fixed on the first transverse steel bars 61 and the second transverse steel bars 62 respectively; concrete is poured on the interval and the core mold 5 and the top of the precast beam 2 to form the cast-in-place beam 4 and the floor panel 6 at the construction site.

[0030] In the above-mentioned assembled hollow floor, all prefabricated one-way single-rib beam bottom plates are connected by cast-in-place beams 4, and the floor panels 6 and cast-in-place beams 4 are integrally formed by cast-in-place and connected to the prefabricated one-way single-rib beam bottom plates to form a hollow floor structure. The hollow floor structure is easy to construct and has a high assembly rate. The ends of the X-direction steel bars 11 of the prefabricated one-way single-rib beams extend upward and are buried in the cast-in-place beams 4, so that the X-direction steel bars 11 have a higher anchoring force, so that the connection between the floor bottom plates 3 of the hollow floor has better crack resistance, thereby improving the integrity and rigidity of the hollow floor.

[0031] The specific construction process is as follows:

[0032] 1. Factory produces prefabricated one-way single-rib beam bottom plate;

[0033] 2. The floor slab 3 is assembled on the construction site. The prefabricated one-way single-rib beam bottom slab is moved to the load-bearing structure 7 by hoisting. The assembly diagram is shown in Figure 5 As shown, a space is reserved between two adjacent prefabricated one-way single-rib beams;

[0034] 3. Tie 4 steel bars of cast-in-place beam in the interval;

[0035] 4. Install and fix the core mold 5 on the base plate 1 on both sides of the prefabricated beam 2;

[0036] 5. Tie the panel reinforcement;

[0037] 6. Pour concrete on the intervals and core molds 5 and on the top of the precast beams 2 to form cast-in-place beams 4 and floor panels 6. Embodiment 2

[0038] A prefabricated unidirectional single-rib beam bottom plate, the difference between this embodiment and the first embodiment is that two longitudinal prefabricated beams are arranged on the base plate.

[0039] An assembled hollow floor structure, the difference between this embodiment and the first embodiment is that the floor bottom plate is formed by splicing a plurality of prefabricated one-way single-rib beam bottom plates described in this embodiment together.

[0040] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A prefabricated unidirectional single-rib beam bottom plate, characterized in that: The utility model comprises a base plate, on which a precast beam is longitudinally arranged, and the precast beam and the base plate are integrally formed by pouring concrete; a plurality of X-direction steel bars and a plurality of Y-direction steel bars are embedded in the base plate, and both ends of the X-direction steel bars extend to the outside of the base plate and are bent upward; a plurality of precast beam stirrups are embedded in the precast beam, and the upper ends of the precast beam stirrups extend upward to the outside of the precast beam and are bent inward to form an opening, a precast beam bottom reinforcement is fixed to the bottom of the precast beam stirrups, and a precast beam waist reinforcement is fixed to the waist of the precast beam stirrups.

2. The prefabricated unidirectional single-rib beam bottom plate according to claim 1, characterized in that: The prefabricated beam is provided in one or two pieces.

3. An assembled hollow floor structure, characterized in that: It includes a floor slab, which includes a plurality of prefabricated one-way single-rib beam slabs as described in claim 2, and the plurality of prefabricated one-way single-rib beam slabs are spliced ​​with each other; a gap is left between two adjacent prefabricated one-way single-rib beam slabs, a cast-in-place beam is arranged in the gap, and cast-in-place beam reinforcement is arranged in the cast-in-place beam; core molds are arranged between adjacent prefabricated beams and cast-in-place beams, a floor panel is arranged on the top of the core mold, and panel reinforcement is arranged in the floor panel; the floor panel and the cast-in-place beam are integrally formed by pouring concrete on site.

4. The assembled hollow floor structure according to claim 3, characterized in that: The extended sections of the X-direction steel bars of two adjacent prefabricated unidirectional single-rib beam bottom plates are staggered and fitted together, and the cast-in-place beam steel bars include cast-in-place beam bottom bars fixed on the extended sections of the X-direction steel bars, a plurality of cast-in-place beam stirrups are fixed on the cast-in-place beam bottom bars, cast-in-place beam waist bars are fixed to the waist of the cast-in-place beam stirrups, and cast-in-place beam top bars are fixed to the tops of the cast-in-place beam stirrups.

5. The assembled hollow floor structure according to claim 4, characterized in that: The precast beam top reinforcement is fixed to the bending part of the precast beam stirrups by U-shaped stirrups, and the panel reinforcement includes multiple first transverse reinforcements and multiple second transverse reinforcements, the first transverse reinforcements are fixed to the precast beam stirrups and the cast-in-place beam stirrups, the second transverse reinforcements are fixed to the precast beam top reinforcement and the cast-in-place beam top reinforcement, and multiple first longitudinal reinforcements and multiple second longitudinal reinforcements are fixed to the first transverse reinforcement and the second transverse reinforcement, respectively.

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