Precast concrete steel bar truss structure

Abstract

The utility model discloses a prefabricated concrete steel bar truss structure which comprises a bottom plate and a plurality of steel bar truss bodies, the steel bar truss bodies are arranged on the bottom plate at equal intervals, and each steel bar truss body is composed of two lower chord steel bars, an upper chord steel bar, two web member steel bars and a plurality of connecting plates. A plurality of connecting bases are arranged on the periphery of the upper end of each bottom plate at equal intervals, and every two adjacent bottom plates are connected through a plurality of fixing assemblies connected with the corresponding connecting bases. The truss structure is reasonable in structural design, simple in structure and convenient to machine, has good strength and compression resistance, prevents the deformation phenomenon of the truss structure, can enable the two adjacent bottom plates to be fully attached, connected and assembled through the fixing assemblies, and avoids the deviation problem of the bottom plates.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a prefabricated concrete steel bar truss structure. Background Art

[0002] At present, there are two main forms of floor panels in buildings, one is prefabricated panels and the other is cast-in-place concrete floor panels. Prefabricated floor panels are prefabricated on the ground and installed by on-site hoisting. Reinforced truss floor decks are trusses made of steel bars as upper chords, lower chords and webs, connected by resistance spot welding. Reinforced trusses and bottom plates are connected by resistance spot welding to form an integral combined load-bearing plate, which improves the construction quality of the floor.

[0003] For example, the publication number is: CN215483621U, and the application name is: An application document for a steel truss plate end connection node structure, including a truss plate body, the bottom of the right side and the front side of the truss plate body are fixedly connected with lap blocks, the left side and the rear side of the top of the truss plate body are provided with cross blocks, the bottom of the cross block is fixedly connected with a fixed block, and the bottom of the fixed block penetrates into the interior of the truss plate body... This application document is a prior art relative to the present application. In this application, the connection of the truss plate body can be facilitated by the coordinated use of lap blocks and lap grooves, but in this application document, the lap blocks are located on the side walls of the truss plate body and protrude from the truss plate body, and the lengths of the lap blocks and the truss plate body are not the same, so that when splicing, the lap blocks on the outermost truss plate body are protruding, and there is a missing corner between the lap blocks and the truss plate body, which affects the appearance and the progress of construction work. For this reason, we designed a precast concrete steel truss structure to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art, and to propose a prefabricated concrete steel truss structure, which has a simple structure, is easy to process, has good strength and compressive resistance, prevents the truss structure from deforming, and can make two adjacent bottom plates fully fit, connect and assemble through fixing components to avoid the problem of bottom plate offset.

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

[0006] A precast concrete steel truss structure comprises a base plate and a plurality of steel truss bodies, wherein the plurality of steel truss bodies are arranged on the base plate at equal intervals, the steel truss bodies are composed of two lower chord steel bars, one upper chord steel bar, two web steel bars and a plurality of connecting plates, a plurality of connecting seats are arranged at equal intervals around the upper end of the base plate, and two adjacent base plates are connected by a plurality of fixing components connected to the corresponding connecting seats.

[0007] Preferably, the base plate is a cement pressure prefabricated plate.

[0008] Preferably, a steel wire mesh layer is pre-embedded in the base plate, and the lower chord steel bars and the connecting plate are welded to the steel wire mesh layer.

[0009] Preferably, the upper chord steel bars are arranged above the two lower chord steel bars, the vertical cross-sections of the upper chord steel bars and the two lower chord steel bars are arranged in a triangular shape, the two web bars are arranged in a curved shape and are respectively welded between the upper chord steel bars and the two lower chord steel bars, and a plurality of the connecting plates are welded between the two lower chord steel bars at equal intervals.

[0010] Preferably, a plurality of threaded holes are formed on the connecting seat.

[0011] Preferably, the fixing assembly is composed of two fixing seats and a U-shaped frame connecting the two fixing seats, and the two fixing seats are respectively connected to the corresponding connecting seats by a plurality of screws.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. In this precast concrete reinforced truss structure, the truss body is directly connected to the bottom plate, and there is no need to set connecting fasteners, so as to avoid hollowing after pouring concrete in the later stage. In addition, the setting of the reinforced truss body can increase the strength and compressive resistance of the precast concrete reinforced truss structure and prevent the truss structure from deforming.

[0014] 2. In this prefabricated concrete reinforced truss structure, two fixing seats on the fixing assembly are respectively connected to corresponding connecting seats on the two bottom plates by screws. The U-shaped frame can connect and fix two adjacent bottom plates so that the two adjacent bottom plates can fully fit together to avoid the problem of bottom plate offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a prefabricated concrete steel truss structure proposed by the utility model;

[0016] Figure 2 for Figure 1 A magnified view of the structure at center;

[0017] Figure 3 This is a schematic diagram of the connection state structure of a prefabricated concrete steel truss structure proposed by the utility model;

[0018] Figure 4 for Figure 3 Enlarged view of the structure at point B in the middle.

[0019] In the figure: 1. Base plate; 2. Lower chord steel bars; 3. Upper chord steel bars; 4. Web bar steel bars; 5. Connecting plate; 6. Connecting seat; 7. Threaded hole; 8. Fixing seat; 9. Screws; 10. U-shaped frame. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-Figure 4 A prefabricated concrete steel truss structure comprises a bottom plate 1 and a plurality of steel truss bodies, the bottom plate 1 is a cement pressure prefabricated plate, a plurality of steel truss bodies are arranged on the bottom plate 1 at equal intervals, the steel truss body is composed of two lower chord steel bars 2, an upper chord steel bar 3, two web steel bars 4 and a plurality of connecting plates 5, a steel wire mesh layer is embedded in the bottom plate 1, the lower chord steel bars 2 and the connecting plates 5 are welded and connected to the steel wire mesh layer, the arrangement of the steel wire mesh layer enables the steel truss body to be connected to the bottom plate 1, which can not only ensure the structural strength and bonding strength of the bottom plate 1, but also improve the connection strength between the steel truss body and the bottom plate 1, and the arrangement of the steel truss body also facilitates the hoisting of the bottom plate 1;

[0022] The upper chord steel bar 3 is arranged above the two lower chord steel bars 2, and the vertical cross-sections of the upper chord steel bar 3 and the two lower chord steel bars 2 are arranged in a triangular shape. The two web steel bars 4 are arranged in a curved shape and are respectively welded between the upper chord steel bar 3 and the two lower chord steel bars 2. The web steel bars 4 can connect the upper chord steel bar 3 and the two lower chord steel bars 2. A plurality of connecting plates 5 are welded between the two lower chord steel bars 2 at equal intervals, which can increase the compressive performance of the truss structure and prevent the deformation of the truss plate body.

[0023] A plurality of connecting seats 6 are evenly spaced around the upper end of the base plate 1, and the connecting seats 6 are welded to the wire mesh layer. A plurality of threaded holes 7 are opened on the connecting seats 6. Two adjacent base plates 1 are connected by a plurality of fixing components connected to the corresponding connecting seats 6. The fixing components are composed of two fixing seats 8 and a U-shaped frame 10 connecting the two fixing seats 8. The two fixing seats 8 are respectively connected to the corresponding connecting seats 6 by a plurality of screws 9, and the screws 9 are threadedly connected to the corresponding threaded holes 7. The two adjacent base plates 1 can be connected and fixed through the fixing components, so that the two adjacent base plates 1 can be fully fitted to avoid the problem of offset of the base plate 1, and the fixing components are arranged to connect the two adjacent base plates 1 through the top of the base plate 1, which will not affect the aesthetics of the base plate 1 and the progress of construction work.

[0024] The functional principle of the utility model can be explained through the following operation modes:

[0025] In the utility model, the precast concrete steel truss structure is simple and easy to process. The steel truss body is directly fixedly connected to the base plate 1 without setting connecting fasteners, thereby avoiding hollowing after pouring concrete in the later stage. The setting of the steel truss body can increase the strength and compressive resistance of the precast concrete steel truss structure and prevent the truss structure from deforming. When the two base plates 1 are spliced ​​and installed, the fixing assembly is placed above the base plate 1, and the fixing seat 8 is connected to the corresponding connecting seat 6 by screws 9. The U-shaped frame 10 can connect the two adjacent base plates 1 so that the two adjacent base plates 1 can be fully fitted to avoid the problem of offset of the base plate 1.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A prefabricated concrete steel truss structure, comprising a base plate (1) and a plurality of steel truss bodies, characterized in that: A plurality of the steel bar truss bodies are arranged at equal intervals on a base plate (1), the steel bar truss bodies are composed of two lower chord steel bars (2), one upper chord steel bar (3), two web steel bars (4) and a plurality of connection plates (5), a plurality of connection seats (6) are arranged at equal intervals around the upper end of the base plate (1), and two adjacent base plates (1) are connected via a plurality of fixing components connected to the corresponding connection seats (6).

2. A prefabricated concrete steel truss structure according to claim 1, characterized in that: The base plate (1) is a cement pressure prefabricated plate.

3. The precast concrete steel truss structure according to claim 1, characterized in that: A steel wire mesh layer is pre-buried in the base plate (1), and the lower chord steel bars (2) and the connecting plate (5) are both welded to the steel wire mesh layer.

4. The precast concrete steel truss structure according to claim 1, characterized in that: The upper chord steel bar (3) is arranged above the two lower chord steel bars (2); the vertical cross-sections of the upper chord steel bar (3) and the two lower chord steel bars (2) are arranged in a triangular shape; the two web bars (4) are arranged in a curved shape and are respectively welded between the upper chord steel bar (3) and the two lower chord steel bars (2); and a plurality of the connecting plates (5) are welded between the two lower chord steel bars (2) at equal intervals.

5. The precast concrete steel truss structure according to claim 1, characterized in that: The connecting seat (6) is provided with a plurality of threaded holes (7).

6. The precast concrete steel truss structure according to claim 1, characterized in that: The fixing assembly is composed of two fixing seats (8) and a U-shaped frame (10) connecting the two fixing seats (8), and the two fixing seats (8) are respectively connected to the corresponding connecting seats (6) through a plurality of screws (9).

Images