阅读说明：本技术 基于轻钢龙骨和水泥板的混凝土叠合板底板制备方法 (Preparation method of concrete laminated slab bottom plate based on light steel keels and cement boards ) 是由 孟凡林 于 2019-09-02 设计创作，主要内容包括：基于轻钢龙骨和水泥板的混凝土叠合板底板制备方法,属于建筑工程技术领域,制备方法简单,制备工效高,工厂和现场均可以制作。将轻钢龙骨下翼缘带钢采用结构胶粘贴在水泥板上,并通过自攻钉紧固,保证粘结可靠,水泥板作为混凝土叠合板底板,成为混凝土板的一部分,可以直接起到钢筋保护层的作用,省去了布设混凝土保护层垫块的工序,钢筋布置比较简便。本发明制备的混凝土叠合板底板自重轻、方便运输和吊装,同时也不存在容易开裂的问题,建造的混凝土板质量好,同时可显著降低建造成本。(A preparation method of a concrete composite slab base plate based on light steel keels and cement boards belongs to the technical field of building engineering, is simple, has high preparation efficiency, and can be manufactured in factories and on site. The light steel keel lower flange strip steel is adhered to the cement plate through the structural adhesive and fastened through the self-tapping screw, so that the bonding reliability is guaranteed, the cement plate serves as a concrete laminated slab bottom plate and becomes a part of the concrete plate, the effect of a steel bar protection layer can be directly played, the process of laying a concrete protection layer cushion block is omitted, and the arrangement of steel bars is simple and convenient. The bottom plate of the concrete composite slab prepared by the invention has light dead weight, is convenient to transport and hoist, and simultaneously has no problem of easy cracking, the quality of the built concrete slab is good, and the construction cost can be obviously reduced.)

1. The preparation method of the concrete laminated slab base plate based on the light steel keels and the cement boards is characterized by comprising the following steps of: comprises the following steps which are sequentially carried out,

step one, preparing a light steel keel (1)

Equally spacing holes (2) on a strip steel plate on a production line of the light steel keel (1), rolling the strip steel plate into the light steel keel (1) with a Z-shaped section, wherein the holes (2) are positioned in the middle of a web plate and are cut according to a designed size for later use;

step two, blanking of the cement board (3)

Blanking according to the specification and the size of a concrete laminated slab base plate to be prepared based on the light steel keel and the cement board; more than one fiber cement pressure plate is adopted, wherein the edge of the joint position of two adjacent fiber cement pressure plates is provided with a chamfer;

step three, installing a light steel keel (1) on the cement board (3)

Cleaning a working platform, flatly paving a cement board (3) which is subjected to blanking on the working platform, positioning and paying off a light steel keel (1) on the paved cement board (3), coating structural adhesive on the bottom surface of a lower flange strip steel of the light steel keel (1) and the cement board (3) corresponding to the lower flange strip steel, placing the light steel keel (1) at the position where the structural adhesive is coated on the cement board (3) and enabling the lower flange strip steel of the light steel keel (1) to be attached to the cement board (3), screwing a self-tapping screw (4) into the lower flange strip steel of the light steel keel (1) and the cement board (3), and fixing the light steel keel (1) on the cement board (3);

step four, preparing the concrete laminated slab base plate based on the light steel keel and the cement plate

Binding plate bottom steel bars, namely firstly arranging longitudinal steel bars (5), then arranging transverse steel bars (6) through holes (2) of webs of the light steel keels (1), binding and fixing the transverse steel bars and the cement plates (3) through self-tapping screws (4), moving out a working platform after finishing binding, stacking, and leaving a factory for use after structural adhesive is cured;

and finishing the preparation of the concrete laminated slab base plate based on the light steel keels and the cement boards.

Technical Field

The invention belongs to the technical field of constructional engineering, relates to an assembled concrete structure, and particularly relates to a preparation method of a concrete composite slab base plate based on a light steel keel and a cement plate.

Background

The bottom plate of the truss reinforced concrete composite slab widely adopted at present is used for preparing the bottom plate of the concrete composite slab with the prefabricated concrete structure, and has the advantages of high self weight, complex production process, difficulty in controlling the precision of thickness and size, difficulty in cracking caused by overlarge demoulding load, difficulty in ensuring the quality and high production cost. The total thickness of the truss reinforced concrete composite slab is large, the common minimum thickness is 130mm, while the thickness of the cast-in-place concrete slab is 100mm, and the construction cost of the concrete composite slab is relatively high.

Utility model patent granted Specification CN201820715677.7 discloses a prefabricated exempt from to tear open floor superimposed sheet. The C-shaped steel is fixed with the cement fiber pressure plate through a drill tail tapping screw, and a steel bar net is bound or welded on the C-shaped steel support frame. The disassembly-free floor laminated slab of the utility model can be prefabricated in factory or can be installed on site; compared with the traditional wood formwork, the formwork removal construction is reduced; compared with the traditional floor bottom die support, the disassembly-free floor composite slab has high rigidity and good integrity, and the support tools can be reduced; compared with a concrete prefabricated laminated slab, the disassembly-free floor laminated slab has the advantages of light dead weight and high cast-in-place construction quality. However, the prefabricated bottom plate of the disassembly-free floor composite slab has poor rigidity, still needs a dense supporting system, is basically equivalent to a cast-in-place concrete slab, and only avoids form disassembly; if compared with a cast-in-place mode, the cost is much lower than that of the utility model because a template which can be recycled for many times is adopted; and set up C shaped steel bottom the reinforcing bar, reduce the arm of force length that the moment of flexure was resisted to the bottom reinforcing bar undoubtedly by a wide margin, can improve the reinforcing bar quantity, because the protective layer thickness is too big can the crack check out to calculate and be difficult to satisfy the regulation requirement of design standard, must further increase the reinforcing bar quantity.

The utility model discloses patent grant specification CN201720709595.7 discloses a hollow superstructure of steel bar truss concrete based on exempt from to tear open template, including the frame roof beam of main rib steel bar truss, inferior rib reinforcing bar, face distribution reinforcing bar, packing mandrel and both ends, still include and pour the exempt from to tear open template as an organic whole with the frame roof beam of main rib steel bar truss, inferior rib reinforcing bar, face distribution reinforcing bar, packing mandrel and both ends, be equipped with a plurality of main rib steel bar truss and inferior rib reinforcing bar between two frame roof beams, main rib steel bar truss constitutes a plurality of with inferior rib reinforcing bar vertical cross arrangement and is used for installing the cavity of packing the mandrel, and main rib steel bar truss sets up exempt from to tear open in the template, the lower part is pour as an organic wholely with exempt from to tear open the template, exempts from to tear open the template and is super high. The main rib prefabricated member in the utility model is a steel bar truss produced in a factory, so that the link of binding main beam steel bars on site is omitted, and the construction period and the labor input are saved; the disassembly-free template used as the bottom die of the hollow floor needs not to be disassembled after concrete pouring is finished, so that the construction period and labor input are saved. However, this utility model discloses a for pouring integrative relation between main rib steel bar truss's lower part and the exempting from to tear open the template, this in-process at actual preparation, almost impossible accomplishes, more impossible realization industrial production, even if made, its exempting from to tear open the intensity of template and just can't be satisfied at all.

Aiming at the problems of the bottom plate of the existing concrete composite slab, a new technical scheme is necessary to be provided.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the preparation method of the concrete laminated slab base plate based on the light steel keels and the cement plates has the advantages that the quality of the prepared concrete laminated slab base plate is good, the rigidity is high, the bearing capacity is high, support can be reduced or avoided, the problem of cracking of the base plate is solved, and the base plate can be manufactured in a factory or on site. The construction quality and efficiency of the concrete composite slab can be obviously improved, and the construction cost is reduced.

The preparation method of the concrete laminated slab base plate based on the light steel keels and the cement boards is characterized by comprising the following steps of: comprises the following steps which are sequentially carried out,

step one, preparing the light steel keel

The method comprises the following steps of (1) equally spacing holes in a strip steel plate on a production line of the light steel keel, rolling the strip steel plate into the light steel keel with a Z-shaped section, locating the holes in the middle of a web plate, and cutting the light steel keel according to a designed size for later use;

step two, cement board blanking

Blanking according to the specification and the size of a concrete laminated slab base plate to be prepared based on the light steel keel and the cement board; more than one fiber cement pressure plate is adopted, wherein the edge of the joint position of two adjacent fiber cement pressure plates is provided with a chamfer;

step three, installing light steel keels on the cement board

Cleaning and leveling a working platform, flatly paving a cement board subjected to blanking on the working platform, positioning and paying off a light steel keel on the flatly paved cement board, coating structural adhesive on the bottom surface of a lower flange strip steel of the light steel keel and the cement board corresponding to the lower flange strip steel, placing the light steel keel at the position where the structural adhesive is coated on the cement board, enabling the lower flange strip steel of the light steel keel to be tightly attached to the cement board, screwing a self-tapping screw into the lower flange strip steel of the light steel keel and the cement board, and fixing the light steel keel on the cement board;

step four, preparing the concrete laminated slab base plate based on the light steel keel and the cement plate

Binding plate bottom steel bars, firstly arranging longitudinal steel bars, then arranging transverse steel bars through holes of a web plate of the light steel keel, binding and fixing the longitudinal steel bars and the web plate through self-tapping screws, moving out the working platform after finishing binding and stacking, and leaving a factory for use after the structural adhesive is cured;

and finishing the preparation of the concrete laminated slab base plate based on the light steel keels and the cement boards.

Through the design scheme, the invention can bring the following beneficial effects: the preparation method of the concrete laminated slab base plate based on the light steel keels and the cement boards is simple, high in preparation efficiency and capable of being manufactured in factories and on sites;

the lower flange strip steel of the light steel keel is adhered to the cement board by adopting structural adhesive and is fastened by the self-tapping screw, so that reliable adhesion is ensured, the cement board is used as a bottom board of the concrete composite slab and becomes a part of the concrete board, a reinforcing steel bar protective layer can be directly played, the process of laying a cushion block of the concrete protective layer is omitted, and the arrangement of the reinforcing steel bar is simpler and more convenient;

the bottom plate of the concrete composite slab prepared by the invention has light dead weight, is convenient to transport and hoist, and simultaneously has no problem of easy cracking, the quality of the built concrete slab is good, and the construction cost can be obviously reduced.

Drawings

The invention is further described with reference to the following figures and detailed description:

fig. 1 is a transverse cross-sectional view of the light gauge steel of the present invention.

Fig. 2 is a longitudinal elevational view of the light gauge steel of the present invention.

FIG. 3 is a schematic view of chamfering the blank of the cement board of the present invention.

FIG. 4 is a schematic view of the longitudinal splicing of the cement boards of the present invention.

Fig. 5 is a schematic cross-sectional view of the installation of the light gauge steel on the floor slab of the present invention.

Fig. 6 is a schematic enlarged cross-sectional view of a portion of a light gauge steel installed on a floor slab according to the present invention.

Fig. 7 is a schematic longitudinal sectional view of the installation of the light steel keel on the cement board according to the invention.

Fig. 8 is an enlarged partial longitudinal cross-sectional view of the present invention for installing a light gauge steel on a concrete panel.

Fig. 9 is an isometric view of the invention after installation of the light gauge steel on a concrete panel.

Fig. 10 is a schematic cross-sectional view of a bottom plate of a concrete composite slab based on a light steel keel and a cement plate according to the invention.

FIG. 11 is an enlarged partial cross-sectional view of the bottom plate of the concrete composite slab based on the light steel keel and the cement board according to the invention.

Fig. 12 is a longitudinal cross-sectional view of a bottom plate of a concrete composite slab based on a light steel keel and a cement plate according to the invention.

FIG. 13 is an enlarged partial longitudinal cross-sectional view of a bottom plate of a concrete composite slab based on a light steel keel and a cement plate according to the invention.

FIG. 14 is an isometric illustration of a concrete composite deck base based on a light steel runner and a cement board in accordance with the present invention.

In the figure, 1-light steel keel, 2-hole, 3-cement plate, 4-self-tapping screw, 5-longitudinal steel bar and 6-transverse steel bar.

Detailed Description

The preparation method of the concrete composite slab base plate based on the light steel keels and the cement boards, as shown in figures 1 to 14, comprises the following steps which are sequentially carried out,

step one, preparing a light steel keel 1

As shown in fig. 1 and 2, according to the conventional production method of the light gauge steel 1, holes 2 are drilled at equal intervals on a strip steel plate on a production line, then the light gauge steel 1 with the cross section in a Z shape is rolled, the holes 2 are positioned in the middle of a web plate, and the light gauge steel is cut according to the length required by preparing a bottom plate of a concrete composite slab for standby application;

step two, blanking of the cement board 3

As shown in fig. 3 and 4, fiber cement pressure plates are used, and are blanked according to the specification and size required for preparing the concrete composite slab base plate based on the light steel keel and the cement plate; when the specification and size are large, two or more fiber cement pressure plates are adopted, and the edges of the fiber cement pressure plates are chamfered at the position of the abutted seam;

step three, installing the light steel keel 1 on the cement board 3

As shown in fig. 5 to 9, the working platform is cleaned and is ensured to be flat, the cement board 3 which is finished to be blanked is tiled on the working platform, then the light steel keel 1 is positioned and released on the tiled cement board 3, the structural adhesive is coated on the cement board 3 corresponding to the lower flange strip steel of the light steel keel 1, after the structural adhesive is coated on the bottom surface of the lower flange strip steel of the light steel keel 1, the light steel keel 1 is placed at the position where the structural adhesive is coated on the cement board 3, the lower flange strip steel of the light steel keel 1 is tightly attached to the cement board 3, the self-tapping screw 4 is screwed into the lower flange strip steel of the light steel keel 1 and the cement board 3, and the light steel keel 1 is fixed on the cement board 3;

step four, preparing the concrete laminated slab base plate based on the light steel keel and the cement plate

And step three, as shown in fig. 10-14, binding the bottom steel bars according to the traditional steel bar binding mode, firstly arranging longitudinal steel bars 5, then arranging transverse steel bars 6 through the holes 2 of the web plate of the light steel keel 1, binding and fixing the self-tapping screws 4 and the cement board 3, moving out the working platform after finishing, stacking, and leaving the factory after the structural adhesive is cured.

And finishing the preparation of the concrete laminated slab base plate based on the light steel keels and the cement boards.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.