CN114075854A

CN114075854A - Welding-free laminated plate

Info

Publication number: CN114075854A
Application number: CN202010821826.XA
Authority: CN
Inventors: 邱伯谦
Original assignee: Changsha Juxing Light Weight Building Materials Co ltd
Current assignee: Changsha Juxing Light Weight Building Materials Co ltd
Priority date: 2020-08-15
Filing date: 2020-08-15
Publication date: 2022-02-22

Abstract

The invention discloses a welding-free composite slab, which comprises a concrete bottom plate and a truss arranged on the concrete bottom plate, wherein longitudinal steel bars parallel to the length direction of the concrete bottom plate are also arranged in the concrete bottom plate, the truss comprises an upper chord parallel to the length direction of the concrete bottom plate, and a plurality of groups of first web members and second web members which are respectively arranged at two opposite sides of the upper chord, the top ends of the first web members and the second web members are fixedly connected with the upper chord by welding, and the bottom ends of the first web members and the second web members are respectively embedded in the concrete bottom plate, and the welding-free composite slab is characterized in that: the first web member and the second web member are arranged into an inverted V-shaped structure, two lower ends of the inverted V-shaped structure are arranged into hook structures, each hook is an inverted open R-shaped structure, the hook structures arranged on the first web member and the second web member are arranged in a manner of being opposite to and perpendicular to the longitudinal direction, and the longitudinal steel bars penetrate through the hook structures and are fixed; u-shaped steel bars or N-shaped steel bars are arranged in the concrete bottom plate, and parallel bars of the U-shaped steel bars or the N-shaped steel bars are arranged perpendicular to the length direction of the bottom plate; the method has the advantages of improving the construction efficiency, reducing the cost and the like.

Description

Welding-free laminated plate

(I) technical field

The invention relates to a bottom plate for a building, in particular to a welding-free laminated slab.

(II) background of the invention

In recent years, the concrete truss composite slab is more and more widely applied to the building industry, because the composite slab can reduce the quantity of construction templates and scaffolds in the construction process, the construction efficiency is improved, and the construction cost is further reduced. The existing concrete truss laminated slab mainly comprises a bottom plate and a truss, the truss comprises an upper chord member, a web member and a lower chord member, the web member is a continuous bending reinforcing steel bar, the top bending part of the web member is connected with the outer wall of the upper chord member, the bottom bending part of the web member is embedded in the bottom plate, a transverse reinforcing steel bar embedded in the bottom plate penetrates through the upper side of an included angle of the bottom bending part of the web member, and a plurality of longitudinal reinforcing steel bars are embedded in the bottom plate. When the concrete truss composite slab prepared by the technology is used for grabbing the upper chord member by the hoisting equipment for hoisting, the bottom of the web member is bent and stressed on the transverse steel bar, so that the web member cannot be separated from the concrete bottom plate.

Disclosure of the invention

Aiming at the defects of the prior art, the invention provides the welding-free laminated slab, which has the advantages of improving the construction efficiency, reducing the cost and the like.

The technical scheme of the invention is as follows:

the utility model provides a exempt from to weld superimposed sheet, includes concrete bottom plate and the truss of setting on concrete bottom plate, still be provided with in the concrete bottom plate with the parallel longitudinal reinforcement of concrete bottom plate length direction, the truss include with the parallel last chord member of concrete bottom plate length direction with the multiunit sets up first web member and the second web member in the relative both sides of last chord member respectively, first web member with the top of second web member with last chord member passes through welded fastening and connects, first web member with the bottom of second web member is pre-buried in concrete bottom plate respectively, its characterized in that: the first web member and the second web member are arranged into an inverted V-shaped structure, two lower ends of the inverted V-shaped structure are arranged into hook structures, each hook is an inverted open R-shaped structure, the inner hook structures of the first web member and the hook structures arranged on the second web member are arranged in a manner of being opposite to and perpendicular to the longitudinal direction, and the longitudinal steel bars penetrate through the hook structures and are fixed; u-shaped steel bars or N-shaped steel bars are arranged in the concrete bottom plate, and parallel bars of the U-shaped steel bars or the N-shaped steel bars are perpendicular to the length direction of the bottom plate. Therefore, the welding-free composite slab is convenient to manufacture, binding or welding connection is not needed between the web member and the longitudinal steel bar during manufacturing, the longitudinal steel bar is directly clamped into the hook structure, and the position of the longitudinal steel bar in the bottom plate is more accurate; and the hook structure is an inverted R-shaped structure, when the longitudinal steel bar is placed into the hook structure, the R-shaped opening edge guides the longitudinal steel bar to enter the R-shaped opening, and the fastening opening of the R-shaped opening structure is opened until the longitudinal steel bar completely enters the hook structure, and the longitudinal steel bar is fastened.

Preferably, the longitudinal steel bar is a prestressed reinforcement. Like this for exempt from to weld superimposed sheet under vertical load effect, tensile stress does not appear, reinforcing stability.

Preferably, the upper chord is a steel pipe.

Further, a filling material is poured into the inner cavity of the steel pipe, and the filling material is expanded concrete or expanded mortar. Therefore, the filling material expands in the solidification process, so that the steel pipe is stressed to generate prestress, and the capability of resisting vertical load of the steel pipe is improved.

Furthermore, at least one prestressed reinforcement is pre-embedded in the inner cavity of the steel pipe.

Preferably, the concrete bottom plate comprises lightweight aggregate, and the lightweight aggregate comprises perlite or ceramsite.

Preferably, an anti-cracking net is arranged in the concrete bottom plate.

Preferably, the side edges of the two longitudinal ends of the concrete bottom plate are provided with an upper chamfer and a lower chamfer. Therefore, when concrete is poured, the concrete quickly flows into the bottom plate for concrete prestress superposition, a wedge is formed at the chamfer, the connection between the adjacent bottom plates is strengthened, the formation of cracks is reduced, and the combination of the bottom plate for concrete prestress superposition and the concrete is firmer.

Preferably, the transverse reinforcing steel bars are tilted upwards relative to the bottom plate.

(IV) description of the drawings

FIG. 1, FIG. 2 and FIG. 3 are a cross-sectional view, a longitudinal top view and a longitudinal sectional view of the first embodiment;

FIG. 4, FIG. 5 and FIG. 6 are a cross-sectional view, a longitudinal plan view and a longitudinal sectional view of the second embodiment;

FIG. 7 is a schematic view of a hook structure in an embodiment;

fig. 8 is a dynamic view of the longitudinal reinforcement 3 snapping into the hook structure 7.

Wherein, 1 is the concrete bottom plate, 2 is the truss, 3 is longitudinal reinforcement, 4 are the upper chord member, 5 are first web members, 6 are the second web members, 7 are the crotch structure, 8 are the U-shaped reinforcing bar, 9 are N-shaped reinforcing bar

In the attached drawings, the U-shaped reinforcing steel bars 8 and the N-shaped reinforcing steel bars 9 are schematic diagrams of the arrangement direction and the arrangement position in the concrete bottom plate.

(V) detailed description of the preferred embodiments

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

The first embodiment is as follows:

as shown in fig. 1, 2 and 3, a welding-free composite slab comprises a concrete bottom plate 1 and a truss 2 arranged on the concrete bottom plate, wherein a longitudinal steel bar 3 parallel to the length direction of the concrete bottom plate is further arranged in the concrete bottom plate 1, the truss 2 comprises an upper chord 4 parallel to the length direction of the concrete bottom plate 1, and a plurality of groups of first web members 5 and second web members 6 respectively arranged on two opposite sides of the upper chord, the top ends of the first web members 5 and the second web members 6 are fixedly connected with the upper chord 4 by welding, the bottom ends of the first web members 5 and the second web members 6 are respectively embedded in the concrete bottom plate 1, the first web members 5 and the second web members 6 are arranged in an Λ -shaped structure, two lower ends of the Λ -shaped structure are arranged in a hook structure 7, the hook structures of the first web members 5 and the second web members 2 are oppositely arranged perpendicular to the longitudinal direction, the longitudinal steel bar 3 passes through the hook structure 7 and is fixed; the concrete bottom plate 1 is internally provided with U-shaped steel bars 8, and parallel bars of the U-shaped steel bars 8 are arranged in a direction perpendicular to the length direction of the bottom plate. Fig. 2 shows the position of the U-shaped reinforcement 8 in the concrete floor. As shown in fig. 7 and 8, the hook structure 7 is an inverted open R-shaped structure,

example two:

fig. 4, 5 and 6 are schematic diagrams of the second embodiment. The difference between the second embodiment and the first embodiment is that in the second embodiment, an N-shaped steel bar 9 is arranged in the bottom plate, parallel bars of the N-shaped steel bar 9 are arranged perpendicular to the length direction of the bottom plate, and the longitudinal steel bar 3 passes through the hook structure 7 and is fixed. Fig. 5 shows the position of the N-shaped reinforcement 9 in the concrete floor 1. As shown in fig. 4, chamfers are arranged on the side edges of the two longitudinal ends of the concrete bottom plate, and the transverse steel bars are tilted upwards relative to the bottom plate.

The foregoing is illustrative of specific embodiments of the present invention and reference should be made to the implementation of apparatus and structures not specifically described herein, which is understood to be a general purpose apparatus and method of operation known in the art.

Meanwhile, the above embodiments of the present invention are only used for illustrating the technical solutions of the present invention, and are only examples of the technical solutions of the present invention, and are not used to limit the technical solutions of the present invention and the protection scope thereof. Modifications of the technical solutions disclosed in the claims and the specification by equivalent technical means, equivalent devices and the like should be considered as not exceeding the scope of the claims and the specification of the invention.

Claims

1. A welding-free laminated board, comprising a concrete base plate and a truss arranged on the concrete base plate, the concrete base plate is also provided with longitudinal steel bars parallel to the length direction of the concrete base plate, and the truss comprises a A top chord with parallel lengths, and a plurality of groups of first web rods and second web rods respectively arranged on opposite sides of the top chord rod, the top ends of the first web rod and the second web rod pass through the top chord rod Welding and fixed connection, the bottom ends of the first web rod and the second web rod are respectively pre-buried in the concrete bottom plate, and it is characterized in that: the first web rod and the second web rod are arranged in a Λ-shaped structure , the two lower ends of the Λ-shaped structure are set as hook structures, the hooks are inverted open R-shaped structures, the hook structures of the first web rod and the hook structures provided by the second web rod are perpendicular to each other It is arranged in the longitudinal direction, and the longitudinal steel bars pass through the hook structure and are fixed; U-shaped steel bars or N-shaped steel bars are arranged in the concrete bottom plate, and the parallel bars of the U-shaped steel bars or N-shaped steel bars are perpendicular to the length direction of the bottom plate. set up.

2 . The welding-free laminated board according to claim 1 , wherein the longitudinal reinforcement is a prestressed reinforcement. 3 .

3 . The welding-free laminated board according to claim 1 , wherein the upper chord is a steel pipe. 4 .

4 . The welding-free laminated board according to claim 3 , wherein the inner cavity of the steel pipe is poured with filler, and the filler is expansive concrete or expansive mortar. 5 .

5 . The welding-free laminated board according to claim 3 , wherein at least one prestressed steel bar is pre-embedded in the inner cavity of the steel pipe. 6 .

6. The welding-free laminated board according to any one of claims 1-5, characterized in that the concrete bottom plate comprises light aggregate, and the light aggregate comprises perlite or ceramsite.

7. The welding-free laminated board according to any one of claims 1-5, characterized in that an anti-crack net is arranged in the concrete bottom plate.

8. The welding-free laminated board according to any one of claims 1-5, characterized in that the upper sides of both longitudinal ends of the concrete bottom plate are provided with chamfers.

9 . The welding-free laminated board according to claim 8 , wherein transverse reinforcement bars are protruded from the chamfered edge in the concrete bottom plate. 10 .

10 . The welding-free laminated board according to claim 8 , wherein the transverse reinforcement bars are lifted upward relative to the bottom plate. 11 .