CN213390771U

CN213390771U - Welding-free laminated plate

Info

Publication number: CN213390771U
Application number: CN202021700101.7U
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: 2021-06-08
Anticipated expiration: 2030-08-15

Abstract

The utility model discloses a welding-free superimposed sheet, including concrete bottom plate and truss, 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 upper chord of concrete bottom plate length direction, and the multiunit sets up first web member and the second web member in upper chord relative both sides respectively, first web member and the second web member set up to Λ shape structure, and two lower extremes of Λ shape structure set up to the crotch structure, the crotch be inverted opening R type structure, the longitudinal reinforcement passes and fixes from the crotch structure; 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 utility model relates to a bottom plate for the building especially relates to a exempt from to weld superimposed sheet.

(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.

(III) contents of utility model

The not enough to prior art, the utility model provides a exempt from to weld superimposed sheet improves the efficiency of construction, advantages such as reduce cost.

The technical scheme of the utility model is that:

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 thickness of the concrete bottom plate is 3-5CM, the longitudinal steel bar is a prestressed steel bar, the first web member and the second web member are arranged to be in an inverted V-shaped structure, two lower ends of the inverted V-shaped structure are arranged to be hook structures, the hook is an inverted open R-shaped structure, the inner hook structure of the first web member and the hook structure arranged on the second web member are oppositely arranged perpendicular to the longitudinal direction, and the longitudinal steel bar penetrates through the hook structures and is 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.

So that the welding-free laminated slab has no tensile stress and enhanced stability under the action of vertical load.

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 the 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 prestressed tendon 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 particular embodiments of the present invention and reference should be made to the implementation of apparatus and structures not specifically described herein which are illustrated and described in detail as commonly practiced in the art.

Simultaneously the utility model discloses above-mentioned embodiment only is for the explanation the utility model discloses technical scheme uses, only does the utility model discloses technical scheme's enumeration is not used for the restriction the utility model discloses a technical scheme and protection scope. The modifications of the technical solutions disclosed in the claims and the specification by the equivalent technical means and the equivalent devices should not be considered to be beyond the scope of the claims and the specification of the present invention.

Claims

1. 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 thickness of the concrete bottom plate is 3-5CM, the longitudinal steel bar is a prestressed steel bar, the first web member and the second web member are arranged to be in an inverted V-shaped structure, two lower ends of the inverted V-shaped structure are arranged to be hook structures, the hook is an inverted open R-shaped structure, the hook structures arranged on the first web member and the second web member are oppositely arranged perpendicular to the longitudinal direction, and the longitudinal steel bar penetrates through and is fixed in the hook structures; 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.

2. The weld-free laminated slab of claim 1, wherein the upper chord member is a steel pipe.

3. The welding-free composite slab of claim 2, wherein the inner cavity of the steel pipe is cast with a filler, and the filler is expansive concrete or expansive mortar.

4. The weld-free laminated slab as claimed in claim 2, wherein at least one prestressed reinforcement is embedded in the inner cavity of the steel tube.

5. A weld-free composite according to any one of claims 1 to 4 wherein the concrete floor comprises a lightweight aggregate including perlite or ceramsite.

6. A weld-free composite slab as claimed in any one of claims 1 to 4, wherein the concrete bottom plate is provided with a crack-resistant mesh.

7. A weld-free composite slab as claimed in any one of claims 1 to 4, wherein the concrete bottom plate is chamfered at the upper side edges at both longitudinal ends thereof.

8. A weld-free composite slab as claimed in claim 7, wherein the concrete bottom plate has transverse reinforcing bars extending from the chamfered edges.

9. A weld-free composite slab as claimed in claim 8, wherein the transverse reinforcement is raised upwardly relative to the base.