CN114075850A

CN114075850A - Assembled superimposed sheet

Info

Publication number: CN114075850A
Application number: CN202010821808.1A
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 an assembled 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 web member vertically arranged on the upper chord, the web member is fixedly connected to the upper chord by welding, and the bottom end of the web member is embedded in the concrete bottom plate, and the assembled composite slab is characterized in that: the web members are arranged into an inverted V-shaped structure, two lower ends of the inverted V-shaped structure are arranged into hooked structures, the hooked structures of the web members are arranged perpendicular to the longitudinal direction, the longitudinal steel bars penetrate through and are fixed in the hooked structures, the upper ends of the inverted V-shaped structures at two ends of the upper chord are obliquely arranged towards the middle part of the bottom plate, or the inverted V-shaped structures oppositely arranged at two sides of the upper chord are welded at two ends of the upper chord; the method has the advantages of improving the construction efficiency, reducing the cost and the like.

Description

Assembled superimposed sheet

(I) technical field

The invention relates to a bottom plate for a building, in particular to an assembled 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 fabricated composite 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 an assembled 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 set up the web member at last chord member perpendicularly, the web member passes through welded fastening and connects on last chord member, the bottom of web member is pre-buried in concrete bottom plate, its characterized in that: the utility model discloses a set up in the anchor rod, including web member, upper chord, lower chord, web member, vertical reinforcing bar, the anchor rod is set up to Λ shape structure, and two lower extremes of Λ shape structure set up to the hook structure, the vertical direction setting of hook structure perpendicular to of web member, vertical reinforcing bar is followed pass and fix in the hook structure, and the Λ shape structure upper end at the both ends of upper chord sets up towards the bottom plate middle part slope, and perhaps the both ends welding of upper chord has the relative Λ shape structure that sets up in the upper chord both sides. In this way, the reversed V-shaped structure with the hook is arranged and is perpendicular to the longitudinal direction, so that the manufacturing of the assembled laminated slab is facilitated, the web member and the longitudinal steel bar are directly clamped into the structure with the hook without binding or welding connection during the manufacturing, and the position of the longitudinal steel bar in the bottom plate is more accurate; because the lambda-shaped structure upper end at the both ends of upper chord sets up towards the bottom plate middle part slope, perhaps the both ends welding of upper chord has the lambda-shaped structure of setting up in upper chord both sides relatively, therefore can make the upper chord can not be at longitudinal direction displacement, has guaranteed the stability of structure.

Preferably, the hooked structures are oppositely arranged inwards or outwards.

Preferably, the longitudinal steel bar is a prestressed reinforcement. Like this for assembled superimposed sheet is under vertical load effect, and 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, a transverse reinforcing steel bar extends out of the chamfered edge in the concrete bottom plate, and the transverse reinforcing steel bar is 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, 5 and 6 are a cross-sectional view, a longitudinal plan view and a longitudinal sectional view of the second embodiment.

Wherein, 1 is a concrete bottom plate, 2 is a truss, 3 is a longitudinal steel bar, 4 is an upper chord, 5 is a web member, 7 is a structure with hooks, 11 is a filling material, and 12 is a prestressed steel 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, fig. 2 and fig. 3, an assembled composite slab includes a concrete bottom plate 1 and a truss 2 arranged on the concrete bottom plate, 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 includes an upper chord 4 parallel to the length direction of the concrete bottom plate and a web member 5 vertically arranged on the upper chord, the web member 5 is fixedly connected to the upper chord 4 by welding, the bottom end of the web member 5 is embedded in the concrete bottom plate 1, the web member 5 is arranged in a reversed V-shaped structure, two lower ends of the reversed V-shaped structure are arranged in a hooked structure 7, the hooked structure 7 of the web member is arranged perpendicular to the longitudinal direction, the longitudinal steel bar 3 passes through the hooked structure and is fixed, and the upper ends of the reversed V-shaped structures at two ends of the upper chord 4 are obliquely arranged towards the middle of the concrete bottom plate.

Example two:

fig. 4, 5 and 6 are schematic diagrams of the second embodiment. The second embodiment is different from the first embodiment in that the Λ -shaped structures oppositely arranged on both sides of the upper chord are welded at both ends of the upper chord 4 in the second embodiment.

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. The utility model provides an assembled 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 set up the web member at last chord member perpendicularly, the web member passes through welded fastening and connects on last chord member, the bottom of web member is pre-buried in concrete bottom plate, its characterized in that: the utility model discloses a set up in the anchor rod, including web member, upper chord, lower chord, web member, vertical reinforcing bar, the anchor rod is set up to Λ shape structure, and two lower extremes of Λ shape structure set up to the hook structure, the vertical direction setting of hook structure perpendicular to of web member, vertical reinforcing bar is followed pass and fix in the hook structure, and the Λ shape structure upper end at the both ends of upper chord sets up towards the bottom plate middle part slope, and perhaps the both ends welding of upper chord has the relative Λ shape structure that sets up in the upper chord both sides.

2. The fabricated composite slab of claim 1, wherein said hooked structures are oppositely disposed inwardly or outwardly.

3. The fabricated composite slab of claim 1, wherein said longitudinal rebars are pre-stressed tendons.

4. The fabricated composite slab of claim 1, wherein said upper chord member is a steel pipe.

5. The fabricated composite slab according to claim 4, wherein the inner cavity of the steel pipe is cast with a filler, and the filler is expansive concrete or expansive mortar.

6. The fabricated composite slab of claim 4, wherein at least one prestressed reinforcement is embedded in the inner cavity of the steel tube.

7. Fabricated composite slab according to any of claims 1-6, characterised in that the concrete bottom slab comprises lightweight aggregate, which comprises perlite or ceramsite.

8. Fabricated composite slab according to any of claims 1-6, characterized in that a crack-resistant net is provided in the concrete bottom plate.

9. A fabricated composite slab according to any one of claims 1 to 6, wherein the concrete bottom slab is chamfered at the upper side edges at both longitudinal ends thereof.

10. A fabricated composite slab according to claim 9 wherein the concrete bottom slab has transverse reinforcing bars extending from the chamfered edges, the transverse reinforcing bars being raised upwardly relative to the bottom slab.