阅读说明：本技术 基于钢材桁架和水泥板的混凝土叠合板底板及制备方法 (Concrete laminated slab bottom plate based on steel truss and cement plate and preparation method ) 是由 孟凡林 于 2019-09-02 设计创作，主要内容包括：基于钢材桁架和水泥板的混凝土叠合板底板及制备方法,属于建筑工程技术领域,其制备方法简单,制备工效高,工厂和现场均可以制作。将钢材桁架下弦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 concrete composite slab bottom plate based on a steel truss and a cement plate and a preparation method thereof belong to the technical field of constructional engineering, and the preparation method is simple, high in preparation efficiency and capable of being manufactured in factories and on site. The steel truss lower chord strip steel is adhered to the cement plate by structural adhesive and is fastened by the self-tapping screw, so that reliable adhesion is ensured, the cement plate serves as a bottom plate of the concrete composite slab and becomes a part of the concrete plate, a steel bar protective layer can be directly acted, the process of laying a cushion block of the concrete protective layer 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. Concrete superimposed sheet bottom plate based on steel truss and cement slab, characterized by: the steel truss structure comprises a steel truss (1) and a cement plate (5), wherein the steel truss (1) comprises a lower chord steel strip (2), an upper chord steel bar (3) and web member steel bars (4), and the web member steel bars (4) are in a tooth-shaped continuous zigzag shape and are arranged in two; the two lower chord steel strips (2) are respectively welded with the lower ends of the web member steel bars (4), the upper chord steel bar (3) is one, and the two sides of the upper chord steel bar (3) are respectively welded with the top ends of the web member steel bars (4); the cement board (5) is more than one fiber cement pressure board, and chamfers are arranged at the edges of the cement board (5) at the joint positions; the steel truss (1) is fixedly connected with the cement plate (5) through a lower chord steel strip (2) and a self-tapping screw (6).

2. The preparation method of the concrete composite slab base plate based on the steel truss and the cement plate is characterized by comprising the following steps of: the preparation of the steel truss and cement panel-based concrete composite floor according to claim 1, comprising the following steps, and the following steps are sequentially performed,

step one, preparing a steel truss (1)

On a truss steel bar production line, replacing a lower chord steel bar at the bottom of the truss steel bar by strip steel to prepare a steel truss (1);

step two, blanking of the cement board (5)

Blanking according to the specification and the size of a concrete composite slab base plate to be prepared based on a steel truss and a cement plate, splicing by more than one fiber cement pressure plate, and arranging a chamfer at the edge of the fiber cement pressure plate at the position of a seam;

step three, installing a steel truss (1) on the cement board (5)

Cleaning and flattening a working platform, paving the cement board (5) which is subjected to blanking in the second step on the working platform, positioning and paying off the steel truss (1) on the paved cement board (5), coating structural adhesive on the cement board (5) corresponding to the bottom surface of the lower chord strip steel (2) and the bottom surface of the lower chord strip steel (2), placing the steel truss (1) at the position where the structural adhesive is coated on the cement board (5), tightly attaching the lower chord strip steel (2) to the cement board (5), screwing a self-tapping screw (6) into the lower chord strip steel (2) and the cement board (5), and fixing the steel truss (1) on the cement board (5);

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

Binding plate bottom steel bars, binding and fixing the transverse steel bars and the web member steel bars (4), moving out the working platform after finishing binding, stacking, and leaving the factory for use after the structural adhesive is cured;

thus, the preparation of the concrete composite slab base plate based on the steel truss and the cement plate is completed.

Technical Field

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

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, the construction cost of the concrete slab is high, and the thickness of the traditional cast-in-place concrete slab is only 100 mm.

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 can be prefabricated in a 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 concrete laminated slab bottom plate based on the steel truss and the cement plate and the preparation method thereof are provided, so that the prepared concrete laminated slab bottom plate has good quality, large rigidity and high bearing capacity, can reduce or avoid support, does not have the problem of bottom plate cracking, and 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.

Concrete superimposed sheet bottom plate based on steel truss and cement slab, characterized by: the steel truss comprises a lower chord steel strip, an upper chord steel bar and web member steel bars, wherein the web member steel bars are in a tooth-shaped continuous fold line shape and are arranged in two; the two lower chord steel strips are respectively welded with the lower ends of the web member steel bars, the upper chord steel bar is one, and the two sides of the upper chord steel bar are respectively welded with the top ends of the web member steel bars; the cement board is more than one fiber cement pressure board, and chamfers are arranged at the edges of the cement boards at the abutted seam positions; the steel truss and the cement board are fixedly connected through the lower chord steel strip and the self-tapping screw.

The preparation method of the concrete composite slab base plate based on the steel truss and the cement plate is characterized by comprising the following steps of: the preparation of the steel truss and cement panel-based concrete composite floor according to claim 1, comprising the following steps, and the following steps are sequentially performed,

step one, preparing a steel truss

On a truss steel bar production line, replacing a lower chord steel bar at the bottom of a truss steel bar by strip steel to prepare a steel truss;

step two, cement board blanking

Blanking according to the specification and the size of a concrete composite slab base plate to be prepared based on a steel truss and a cement plate, splicing by more than one fiber cement pressure plate, and arranging a chamfer at the edge of the fiber cement pressure plate at the position of a seam;

step three, installing steel trusses on the cement board

Cleaning and flattening a working platform, flatly paving the cement board subjected to blanking in the second step on the working platform, positioning and paying off a steel truss on the tiled cement board, coating structural adhesive on the cement board corresponding to the bottom surface of the lower chord strip steel and the bottom surface of the lower chord strip steel, placing the steel truss at the position where the structural adhesive is coated on the cement board, tightly attaching the lower chord strip steel to the cement board, screwing a self-tapping screw into the lower chord strip steel and the cement board, and fixing the steel truss on the cement board;

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

Binding plate bottom steel bars, binding and fixing the transverse steel bars and the web member steel bars, moving out of the working platform after completion, stacking, and leaving the factory for use after the structural adhesive is cured;

thus, the preparation of the concrete composite slab base plate based on the steel truss and the cement plate is completed.

Through the design scheme, the invention can bring the following beneficial effects: the concrete composite slab base plate based on the steel truss and the cement plate and the preparation method have the advantages of simple preparation method, high preparation efficiency and capability of being manufactured in factories and on sites.

Further, the steel truss lower chord strip steel is adhered to the cement plate by structural adhesive and is fastened by the self-tapping screws, so that reliable adhesion is guaranteed, the cement plate serves as a bottom plate of the concrete composite slab and becomes a part of the concrete plate, the effect of a 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 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.

Drawings

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

fig. 1 is a schematic cross-sectional view of a steel truss according to the present invention.

Fig. 2 is a longitudinal elevation view schematically showing a steel truss according to 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 a steel truss installed on a concrete panel according to the present invention.

Fig. 6 is a partially enlarged cross-sectional view of a steel truss installed on a concrete panel according to the present invention.

Fig. 7 is a longitudinal sectional view schematically illustrating the installation of a steel truss on a concrete panel according to the present invention.

Fig. 8 is an enlarged partial longitudinal cross-sectional view of a steel truss installed on a concrete panel according to the present invention.

Fig. 9 is a schematic top view of a steel truss installed on a concrete panel according to the present invention.

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

FIG. 11 is a schematic enlarged cross-sectional view of a bottom plate of a concrete composite slab based on a steel truss and a cement plate according to the present invention.

Fig. 12 is a longitudinal sectional view of a bottom plate of a concrete composite slab based on a steel truss and a cement plate according to the present invention.

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

FIG. 14 is a top view of a concrete composite slab base slab based on steel trusses and cement slabs in accordance with the present invention.

In the figure, 1-steel truss, 2-lower chord steel strip, 3-upper chord steel bar, 4-web member steel bar, 5-cement plate and 6-self-tapping screw.

Detailed Description

The concrete composite slab bottom plate based on the steel truss and the cement plate comprises a steel truss 1 and a cement plate 5, wherein the cross section of the steel truss 1 is in an isosceles triangle shape as shown in figures 1 and 2, the steel truss comprises lower chord steel bars 2, upper chord steel bars 3 and web member steel bars 4, the lower chord steel bars 2 are arranged at the bottom of the steel truss 1 and are in welded connection with the bottom of the web member steel bars 4 at the upper part of the steel truss; the upper chord steel bar 3 is one and is arranged at the top of the steel truss 1 and is welded with the web member steel bars 4 at two sides of the top of the web member steel bar 4; the two web member steel bars 4 are in a tooth-shaped continuous fold line shape;

as shown in fig. 3 and 4, the cement board 5 is more than one fiber cement pressure board, and the edges of the cement board 5 at the joint position are provided with chamfers; the steel truss 1 and the cement plate 5 are fixedly connected through a lower chord steel strip 2 and a self-tapping screw 6.

A concrete composite slab base plate based on a steel truss and a cement plate and a preparation method thereof are disclosed, as shown in figures 1-9, the concrete composite slab base plate is prepared by adopting the steel truss 1 and the cement plate 5, and comprises the following steps which are sequentially carried out,

step one, preparing a steel truss 1

As shown in fig. 1 and 2, according to a conventional method for producing steel truss reinforcing steel bars, steel bars of a lower chord member at the bottom of the steel truss reinforcing steel bars are replaced by strip steel to prepare a steel truss 1;

step two, blanking of the cement board 5

As shown in fig. 3 and 4, fiber cement pressure plates are used for blanking according to the specification and size required for preparing the concrete laminated slab base plate based on the steel truss 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 steel truss 1 on the cement plate 5

As shown in fig. 5 to 9, the working platform is cleaned and is ensured to be flat, the cement board 5 which is finished to be blanked is tiled on the working platform, then the steel truss 1 is positioned and paid off on the tiled cement board 5, the structural adhesive is coated on the cement board 5 corresponding to the lower chord steel strip 2, after the structural adhesive is coated on the bottom surface of the lower chord steel strip 2, the steel truss 1 is placed at the position where the structural adhesive is coated on the cement board 5, the lower chord steel strip 2 is tightly attached to the cement board 5, the self-tapping screw 6 is screwed into the lower chord steel strip 2 and the cement board 5, and the steel truss 1 is fixed on the cement board 5;

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

And step three, as shown in fig. 10-14, binding the plate bottom steel bars according to the traditional steel bar binding mode, binding and fixing the transverse steel bars and the web member steel bars 4, moving out the working platform after finishing the binding and stacking, and leaving the factory after the structural adhesive is cured.

Thus, the preparation of the concrete composite slab base plate based on the steel truss and the cement plate is completed.

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.