Demounting-free bottom die steel bar truss prefabricated part and hollow floor slab

Abstract

The steel bar truss prefabricated part comprises a bottom plate and a plurality of steel bar trusses arranged above the bottom plate, and the steel bar trusses are connected with the bottom plate and distributed at intervals. A plurality of core molds which are distributed at intervals are arranged between the adjacent steel bar trusses; the first plate bottom steel bars are arranged above the bottom plate in parallel and are distributed at intervals, and gaps are formed between the first plate bottom steel bars and the bottom surfaces of the bottom plate and the core mold. The prefabricated part is high in integration degree, light in self-weight, convenient to produce in an automatic factory, small in consumption of reinforcing steel bars and concrete, light in self-weight, good in heat preservation and sound insulation effect, convenient to construct and better in economical efficiency, and a floor slab structure formed after concrete is poured is small in consumption of the reinforcing steel bars and the concrete.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled floor slabs, in particular to a prefabricated steel truss component and a hollow floor slab without dismantling a bottom formwork. Background Art

[0002] In the existing engineering technology field, cast-in-place hollow floor technology can meet the needs of current multi-story buildings with large column grids, large bays and large spaces due to its light weight and large span. This floor not only provides flexible application space, but also has the advantages of reducing structural deadweight, increasing floor stiffness, improving sound insulation and reducing structural cost. It is widely used in construction projects.

[0003] With the development of prefabricated buildings, high requirements have been put forward for low-carbon and environmentally friendly construction methods in the construction field. However, cast-in-place hollow-core slabs still use traditional construction technology. Due to the complexity of the process, the on-site construction is cumbersome, especially the large amount of formwork and steel bar engineering, and the on-site construction efficiency is very low. This high-consumption and low-efficiency construction method can no longer meet the relevant requirements of current prefabricated buildings. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a prefabricated steel truss component and a hollow floor slab without dismantling the bottom formwork, thereby solving the problems of high construction cost and low construction efficiency of the existing hollow floor slab technology.

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

[0006] A prefabricated component of a steel bar truss without requiring dismantling of a bottom formwork, comprising a bottom plate and a plurality of steel bar trusses above the bottom plate, wherein the plurality of steel bar trusses are connected to the bottom plate and are spaced apart; a plurality of core molds spaced apart are provided between adjacent steel bar trusses; and a plurality of first plate bottom steel bars are arranged in parallel above the bottom plate, wherein the plurality of first plate bottom steel bars are spaced apart and have gaps between the bottom plate and the bottom surface of the core mold.

[0007] As an optimization, the first slab bottom reinforcement is parallel or perpendicular to the reinforcement truss.

[0008] As an optimization, it also includes a plurality of second slab bottom steel bars arranged perpendicularly and crosswise with the first slab bottom steel bars, wherein the second slab bottom steel bars are distributed at intervals and have gaps with the bottom surface of the bottom plate and the core mold.

[0009] As an optimization, the steel truss includes an upper chord and two lower chords distributed in a herringbone shape, and a web bar is provided between the upper chord and the lower chord.

[0010] As an optimization, the steel truss is connected to the bottom plate through a connector, so that there is a gap between the steel truss and the bottom plate.

[0011] As an optimization, the core mold is a hollow structure or a solid structure made of lightweight material, and is in the shape of a rectangular parallelepiped as a whole.

[0012] As an optimization, the core mold is provided with a plurality of supporting feet at the bottom near the bottom plate, and the core mold is connected to the bottom plate through the supporting feet.

[0013] As an optimization, the support legs are made integrally with the core mold.

[0014] Based on the above-mentioned prefabricated components, the utility model also provides a hollow floor slab with a steel truss that does not require dismantling of the bottom formwork, including the above-mentioned prefabricated components of the steel truss that does not require dismantling of the bottom formwork, a first slab top steel mesh is provided on the upper part of the steel truss, and a concrete structure layer is cast on the bottom plate, and the thickness of the concrete structure layer is greater than the distance between the upper side of the first slab top steel mesh and the top surface of the bottom plate.

[0015] As an optimization, a second slab top steel mesh is also provided between the first slab top steel mesh and the top surface of the core mold.

[0016] Compared with the prior art, this application has the following beneficial effects:

[0017] 1. This application combines hollow floor slab technology with steel truss floor slabs, utilizes the existing steel truss slab technology upgrade, and adds core molds to achieve industrialized production and assembly construction of hollow floors.

[0018] 2. This application uses steel trusses as load-bearing components during the construction phase, which can greatly increase the temporary support span at the bottom and reduce the support workload.

[0019] 3. This application adopts a formwork-free technology, which does not require on-site formwork engineering and improves engineering construction efficiency.

[0020] 4. Part of the steel bars in this application are prefabricated in the factory, which reduces the workload of steel bar tying on site and speeds up construction efficiency.

[0021] 5. The use of core molds in the present application can reduce the deadweight of the floor and increase the sound insulation function of the floor. In addition, insulation modules can be used to increase the thermal insulation performance of the floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the prefabricated steel truss component without dismantling the bottom formwork of the utility model;

[0023] Figure 2 This is a structural schematic diagram of the hollow floor slab of the steel bar truss without dismantling the bottom formwork of the utility model;

[0024] In the figure, 1-bottom plate, 2-steel truss, 3-first plate bottom steel bar, 4-core mold, 5-first plate top steel mesh, 6-concrete structure layer, 7-second plate bottom steel bar. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] For specific implementation: see Figure 1 A prefabricated steel truss component without dismantling the bottom formwork includes a bottom plate 1 and a plurality of steel trusses 2 above it, the plurality of steel trusses 2 are connected to the bottom plate 1 and are spaced apart, the steel trusses 2 include an upper chord and two lower chords distributed in a herringbone shape, and a web bar is provided between the upper chord and the lower chord. A plurality of core molds 4 are spaced apart between adjacent steel trusses 2; and a plurality of first bottom plate steel bars 3 are arranged in parallel above the bottom plate 1, the plurality of first bottom plate steel bars 3 are spaced apart, and there is a gap between the bottom surface of the bottom plate 1 and the core mold 4, that is, the first bottom plate steel bar 3 can be arranged below the core mold 4 or penetrate into the core mold 4, which is specifically determined according to the structure and material of the core mold 4. Specifically, in this embodiment, the first bottom plate steel bar 3 is parallel or perpendicular to the steel truss 2, the first bottom plate steel bar 3 can be supported between the bottom plate 1 and the core mold 4 by various supports or fixings, and can also be overlapped or connected with the steel truss 2, so that the floor slab forms a two-way slab or a one-way slab, which is specifically arranged according to actual needs.

[0027] The present application adds a core mold 4 to the traditional prefabricated steel truss floor slab, so that the final floor structure has a lighter self-weight. Therefore, smaller specifications of steel bars or reinforcement amounts can be selected while ensuring the bearing capacity, and less steel bars are consumed. At the same time, the core mold 4 serves as the internal filling of the floor slab, further reducing the amount of concrete used, thereby reducing concrete consumption and improving economy. Specifically, the core mold 4 is a hollow structure or a solid structure made of lightweight materials. Specifically, the core mold 4 is generally formed by splicing multiple plates to form a hollow structure. Of course, it can also be integrally formed by injection molding. The core mold 4 is provided with multiple legs near the bottom of the base plate 1. The legs are integrally injection molded with the core mold 4, or they can be installed independently. The legs are fitted with the base plate 1 and fixedly connected to the base plate 1 by self-tapping screws that penetrate the base plate 1 and are driven into the legs. The steel truss 2, the base plate 1, the core mold 4, and the first plate bottom steel bar 3 are shipped as a prefabricated component as a whole. The modularization degree is high, and the manufacturing process of each module is relatively mature, which is convenient for automated production. At the same time, the integration degree of each module is high, which improves the construction efficiency on site.

[0028] According to actual needs, a plurality of second bottom plate steel bars 7 are also included, which are arranged perpendicularly and crosswise with the first bottom plate steel bars 3. The second bottom plate steel bars 7 are distributed at intervals and have gaps with the bottom surface of the bottom plate 1 and the core mold 4. The second bottom plate steel bars 7 can be connected with the first bottom plate steel bars 3 to form a mesh structure, or can be independently arranged, and the specific position can be set according to the stress condition of the floor slab.

[0029] The steel truss 2 is connected to the bottom plate 1 through a connector, so that there is a gap between the steel truss 2 and the bottom plate 1. Specifically, the connector generally adopts a rigid structure and is a rectangular parallelepiped structure, and two grooves are provided on its upper side for limiting or clamping the two lower chords of the steel truss 2, so as to support and fix the steel truss 2.

[0030] At the same time, in one embodiment, the first slab bottom steel bars 3 are distributed between adjacent steel bar trusses 2, and the second slab bottom steel bars 7 can be arranged throughout, or can be distributed between adjacent steel bar trusses 2 as needed, so that the lateral force under the steel bar trusses 2 is directly borne by the connecting member, thereby forming a lateral force system at the bottom of the floor slab. Specifically, the second slab bottom steel bars 7 can be installed on site or preset in the factory, which is highly flexible.

[0031] like Figure 2 As shown, based on the above prefabricated components, the utility model also provides a hollow floor slab with a bottom formwork-free steel truss, including the above prefabricated components of the bottom formwork-free steel truss, a first plate top steel mesh 5 is provided on the upper part of the steel truss 2, and a concrete structure layer 6 is cast on the bottom plate 1, and the thickness of the concrete structure layer 6 is greater than the distance between the upper side of the first plate top steel mesh 5 and the top surface of the bottom plate 1. A second plate top steel mesh (not shown) is also provided between the first plate top steel mesh 5 and the core mold 4.

[0032] In summary,

[0033] 1. This application combines hollow floor slab technology with traditional prefabricated steel truss floor slabs, utilizes the existing steel truss slab technology upgrade, and adds core molds to achieve industrialized production and assembly construction of hollow floors.

[0034] 2. This application uses steel trusses as load-bearing components during the construction phase, which can greatly increase the temporary support span at the bottom and reduce the support workload.

[0035] 3. This application adopts a formwork-free technology, which does not require on-site formwork engineering and improves engineering construction efficiency.

[0036] 4. Part of the steel bars in this application are prefabricated in the factory, which reduces the workload of steel bar tying on site and speeds up construction efficiency.

[0037] 5. The use of core molds in the present application can reduce the deadweight of the floor and increase the sound insulation function of the floor. In addition, insulation modules can be used to increase the thermal insulation performance of the floor.

[0038] The prefabricated components of the utility model have a high degree of integration and light weight, and are easy to produce in automated factories. The floor structure formed after pouring concrete consumes less steel bars and concrete, has a light weight, has good thermal insulation and sound insulation effects, is easy to construct, and is more economical.

[0039] Although the embodiments of the present invention have been shown and described, it is apparent to those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and foundations 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 of the present invention. The embodiments of the present invention do not constitute limitations on the present invention from any point of view.

Claims

1. A prefabricated steel truss component without dismantling the bottom formwork, characterized in that: It includes a bottom plate and a plurality of steel trusses above the bottom plate, wherein the plurality of steel trusses are connected to the bottom plate and are spaced apart; a plurality of core molds spaced apart are provided between adjacent steel trusses; and it also includes a plurality of first bottom plate steel bars arranged in parallel above the bottom plate, wherein the plurality of first bottom plate steel bars are spaced apart and have gaps between the bottom plate and the bottom surface of the core mold.

2. The prefabricated bottom formwork-free steel truss component according to claim 1 is characterized in that: The first slab bottom steel bars are parallel or perpendicular to the steel bar trusses.

3. The prefabricated bottom formwork-free steel truss component according to claim 1 is characterized in that: It also includes a plurality of second slab bottom steel bars arranged perpendicularly and crosswise with the first slab bottom steel bars, wherein the second slab bottom steel bars are distributed at intervals and have gaps with the bottom surface of the bottom plate and the core mold.

4. A prefabricated steel truss component without dismantling the bottom formwork according to any one of claims 1 to 3, characterized in that: The steel bar truss comprises an upper chord bar and two lower chord bars which are distributed in a herringbone shape, and a web bar is arranged between the upper chord bar and the lower chord bar.

5. The prefabricated bottom formwork-free steel truss component according to claim 4 is characterized in that: The steel bar truss is connected to the bottom plate through a connecting piece, so that there is a gap between the steel bar truss and the bottom plate.

6. The prefabricated bottom formwork-free steel truss component according to claim 4 is characterized in that: The core mold is a hollow structure or a solid structure made of light material.

7. The prefabricated bottom formwork-free steel truss component according to claim 4 is characterized in that: The bottom of the core mold close to the bottom plate is provided with a plurality of supporting feet, and the core mold is connected to the bottom plate through the supporting feet.

8. The prefabricated bottom formwork-free steel truss component according to claim 7, characterized in that: The supporting legs are made integrally with the core mold.

9. A hollow floor slab with a steel bar truss without dismantling bottom formwork, comprising the prefabricated steel bar truss without dismantling bottom formwork according to any one of claims 1 to 8, characterized in that: A first plate top steel mesh is arranged on the upper part of the steel truss, and a concrete structure layer is poured on the bottom plate, the thickness of the concrete structure layer is greater than the distance between the upper side of the first plate top steel mesh and the top surface of the bottom plate.

10. The bottom formwork-free steel truss hollow floor slab according to claim 9, characterized in that: It also includes a second plate top steel mesh arranged between the first plate top steel mesh and the top surface of the core mold.

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