Formwork-removal-free concrete truss floor support plate on steel structure beam and preparation method and application of formwork-removal-free concrete truss floor support plate

Abstract

The invention relates to a formwork-removal-free concrete truss floor support plate on a steel structure beam and a preparation method and application of the formwork-removal-free concrete truss floor support plate. The preparation method comprises the steps that the web bars and the lower chord bars are bound to form the truss steel bars; concrete is poured so that the steel bars of the truss can be partially embedded in the concrete, and a concrete plate is formed; the concrete plate is cut according to the deepening drawing, after cutting is completed, the upper chord rib is installed on the truss steel bar, and the concrete truss floor support plate is formed; wherein the length of the upper chord rib is larger than that of the truss steel bar, and the two ends of the upper chord rib are bent downwards and installed on the lower chord rib. The truss floor support plate made of concrete is formed through pouring, so that the problems of a steel plate type bottom plate in an existing truss floor support plate are solved; according to the concrete truss floor support plate, the end socket steel bars and the upper chord steel bars are fused into a whole, the mode of installing the upper chord steel bars later is adopted, and the quality problem of welding extension and the problem that the upper chord steel bars and the end socket steel bars are cut off when the plate is cut are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a steel structure beam upper formwork-free concrete truss floor slab, a preparation method thereof and application thereof. BACKGROUND

[0002] As an important system of prefabricated buildings, the steel bar truss floor slab is widely used in prefabricated buildings.

[0003] After the conventional truss floor slab is cut in the factory, the steel bars are flush with the bottom of the concrete slab, and the rivet cap of the steel structure beam is riveted at the site. At this time, the steel bars cannot be welded with the steel beam anchor bolt to form a stable support node. Meanwhile, if the length of the truss floor slab is the same as the distance between the rivet rods, the truss floor slab cannot be installed at the site due to the collision of the steel beam anchor bolt cap. Therefore, after cutting according to the design size of the drawing (the distance between the steel beam anchor bolt caps) in the factory, the process of installing the top chord and the end chord (i.e. combining the end chord steel bars with the top chord) is carried out, so that the end chord steel bars protrude from the end of the truss floor slab. SUMMARY

[0004] In view of the above problems, the present application provides a steel structure beam upper formwork-free concrete truss floor slab, a preparation method thereof and application thereof, aiming to.

[0005] The specific technical solutions are as follows: The first aspect of the present application provides a preparation method of a steel structure beam upper formwork-free concrete truss floor slab, comprising: Binding the web and the bottom chord to form a truss steel bar; Pouring concrete to bury the truss steel bar part in the concrete to form a concrete slab; Cutting the concrete slab according to the deepening drawing, and installing the top chord on the truss steel bar after cutting to form a concrete truss floor slab; Wherein the length of the top chord is greater than the length of the truss steel bar, and the two ends of the top chord are bent downward and installed on the bottom chord.

[0006] Further, the web and the bottom chord are welded and reinforced at the upper contact position.

[0007] Further, the top chord is a full-length steel bar, and the end of the top chord exceeds the concrete slab by 50 mm.

[0008] Further, the truss steel bar is flush with the bottom of the concrete slab when cutting.

[0009] The second aspect of the present application provides a steel structure beam upper formwork-free concrete truss floor slab prepared according to the above method.

[0010] The third aspect of the present application provides a prefabricated steel structure building comprising the concrete truss floor slab.

[0011] Further, the truss floor slab is pre-assembled on the steel structure beam according to the deepening design slab position by the bent foot rib formed by bending the top chord rib, and then the structure slab rib is installed according to the drawing design in sequence, and the concrete is poured to form the prefabricated steel structure building.

[0012] Further, the overlap length of the truss floor slab and the steel structure beam is 40-60 mm.

[0013] Further, the steel beam edge is pasted with foam glue before pre-assembling, and the width of the foam glue is 8-10 mm.

[0014] Further, the truss floor slab is filled with grouting material between the foam glue.

[0015] The beneficial effects of the above scheme are: 1) In the present application, the truss floor slab formed by pouring is made of concrete material to avoid the problems existing in the steel plate bottom plate in the existing truss floor slab; 2) The concrete truss floor slab provided in the present application integrates the head rib and the top chord rib, adopts the mode of installing the top chord rib later, avoids the quality problems of welding lengthening and the problems of cutting off the top chord rib and the head rib when cutting the plate; 3) In the prefabricated building provided in the present application, the foam glue is pasted on the edge of the steel beam, and the truss floor slab is erected on the foam glue during installation, and the truss floor slab and the steel beam are tightly combined to avoid grouting leakage by using the compressible and easy-to-mold characteristics of the foam glue. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0017] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0018] The present application will be further described below in conjunction with specific embodiments, but is not limited to the present application.

[0019] An embodiment of the present invention provides a formwork-free concrete truss floor deck for steel structure beams, the preparation method of which includes: tying the web reinforcement (C6 steel bars) and the bottom chord reinforcement (C12 steel bars) to form truss reinforcement (the web reinforcement and bottom chord reinforcement are welded and reinforced at the upper contact position); pouring C80 high-performance concrete to embed part of the truss reinforcement in the concrete to form a concrete slab; cutting the concrete slab according to the detailed drawing, and after cutting, installing the top chord reinforcement (C12 steel bars, the top chord reinforcement is a continuous steel bar, and the end of the top chord reinforcement extends 50 mm beyond the concrete slab) on the truss reinforcement to form a concrete truss floor deck; wherein, the length of the top chord reinforcement is greater than the length of the truss reinforcement, and the two ends of the top chord reinforcement are bent downward and installed on the bottom chord reinforcement.

[0020] The concrete truss floor deck provided in this invention uses a concrete structure as the surface layer to solve the problems of conventional truss floor decks with steel plates as the bottom plate, which have poorer appearance quality than concrete slabs and are also prone to rust and corrosion.

[0021] Compared to conventional truss floor decking, this invention utilizes the bent top chord reinforcement formed by bending the top chord reinforcement as the connection point, eliminating the need for installing the top chord reinforcement and end reinforcement in the factory or on-site. This reduces welding steps while effectively ensuring welding quality.

[0022] In this invention, the end-cap reinforcement and the top chord reinforcement are integrated into one piece, and the top chord reinforcement is installed afterward, which avoids the quality problems of welding extension and the problem of cutting the top chord reinforcement and end-cap reinforcement when cutting the plate.

[0023] In this invention, the aforementioned concrete truss floor decking can be used to construct a prefabricated steel structure building. In this prefabricated building, the truss floor decking is pre-assembled onto the steel structure beams according to the detailed design panel positions using bent upper chord reinforcement. Then, structural slab reinforcement is installed sequentially according to the drawings, and concrete is poured. In the aforementioned prefabricated steel structure building, the overlap length between the truss floor decking and the steel structure beam is 50 mm. During the overlap, foam adhesive (10 mm wide) is first applied to the edge of the steel beam, and then the truss floor decking is laid on top of the foam adhesive. Utilizing the compressibility and malleability of the foam adhesive, the truss floor decking and steel beam are tightly bonded while controlling the gaps at the bottom of the slab and the voids caused by the truss arching. Grout is then filled into the remaining 40 mm gap between the truss floor decking and the foam adhesive to ensure that no grout flows out of the slab joint during concrete pouring.

[0024] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the content of this specification should be included within the protection scope of the present invention.

Claims

1. A method for manufacturing a formwork-free concrete truss floor deck on a steel structure beam, characterized in that, The method comprises the following steps: Binding the web and the lower chord to form a truss reinforcement; Pouring concrete to partially bury the truss reinforcement in the concrete to form a concrete slab; According to the deepening drawing, the concrete slab is cut, and after cutting, the upper chord is installed on the truss reinforcement to form a concrete truss floor slab; The length of the upper chord is greater than the length of the truss reinforcement, and the two ends of the upper chord are bent downward and installed on the lower chord.

2. The production method according to claim 1, characterized by, The web and the lower chord are welded and reinforced at the upper contact position.

3. The preparation method according to claim 1, characterized in that, The upper chord is a full-length steel bar, and the end of the upper chord exceeds the concrete slab by 50 mm.

4. The method of claim 1, wherein, When cutting, the truss reinforcement is cut flush with the bottom plate of the concrete slab.

5. The steel structure beam on the free-form concrete truss floor support plate, characterized in that, The method is prepared according to any one of claims 1-4.

6. A fabricated steel structure building, characterized by, The method comprises the following steps:

7. The prefabricated steel construction building according to claim 6, characterized in that, The method comprises the following steps:

8. The fabricated steel building structure as claimed in claim 7, wherein, The method comprises the following steps: 9.The fabricated steel structure building of claim 8, wherein The method comprises the following steps: 10.The fabricated steel structure building of claim 9, wherein The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps