Prefabricated fine aggregate concrete reinforced truss floor deck

Abstract

This utility model discloses a prefabricated fine-aggregate concrete reinforced concrete truss floor deck, including a concrete base slab with multiple rows of reinforced concrete trusses embedded on the upper side. Each row of reinforced concrete trusses includes first S-shaped and second S-shaped reinforcing bars on both sides, with their upper arc-shaped portions interlocking to form intersections. It also includes upper and lower chord reinforcing bars, with the upper chord reinforcing bars interlocking and supported at the intersections, and welded to the lower arc-shaped sides of the first and second S-shaped reinforcing bars respectively. The S-shaped reinforcing bars on both sides can interlock with their corresponding upper arc-shaped portions to form intersections, creating a support-like structure for supporting the upper chord reinforcing bars. During installation, the upper chord reinforcing bars are placed directly at the intersections, and then the contact points are welded sequentially. This process of fixing the upper chord reinforcing bars first and then welding prevents welding deviations during installation. Furthermore, the staggered S-shaped reinforcing bars improve the later stability of the truss reinforcement and reduce the likelihood of weld detachment.

Description

Technical Field

[0001] This utility model belongs to the technical field of prefabricated building structures, and in particular relates to prefabricated fine stone concrete reinforced truss floor decking. Background Technology

[0002] Prefabricated fine aggregate concrete reinforced steel truss floor decking is an adjustment to traditional prefabricated composite slabs. It involves factory-embedded, one-time molding to fix the steel truss to the base slab into a unified whole. Produced using industrial methods, it eliminates the need for formwork during construction and supports within a certain span. Used for floor and roof slabs, it meets the requirements of prefabricated buildings. It features simple production processes, high automation, reduced labor, light weight, convenient transportation, and lower production and installation labor costs.

[0003] Transforming on-site manual labor into industrialized production reduces uncontrollable human factors and effectively controls rebar spacing and concrete cover thickness, maximizing compliance with design requirements. In addition to the concrete base, the floor deck slab has a protruding rebar skeleton on the upper side. This skeleton mainly consists of S-shaped rebars on both sides, top chord rebars, and bottom chord rebars. The top chord rebars are located at the curved bend of the S-shaped rebars, and the contact points are fixed by welding. This makes it easy for the welding points to be inaccurate during the splicing of the rebar skeleton, leading to dimensional deviations in the rebar skeleton later. Furthermore, the welding points are lap joints, making them prone to detachment later. Utility Model Content

[0004] The purpose of this utility model is to provide prefabricated fine stone concrete steel truss floor decking, which solves the problems of easy welding deviation and easy weld failure in the installation of the upper chord steel bars.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] The prefabricated fine stone concrete reinforced truss floor slab includes a concrete base slab with a flat bottom and multiple rows of steel trusses embedded on the top. Each row of steel trusses includes a first S-shaped steel bar and a second S-shaped steel bar on both sides. The lower arc-shaped parts of the first S-shaped steel bar and the second S-shaped steel bar are embedded in the base slab, and the upper arc-shaped parts are interlocked and form an intersection point.

[0007] The steel truss also includes upper chord steel bars and lower chord steel bars. The upper chord steel bars are inserted and supported at the intersection. The contact side of the upper chord steel bars with the S-shaped steel bars on both sides is welded and fixed. There are two lower chord steel bars, which are welded and fixed to the arc-shaped side of the lower side of the first S-shaped steel bar and the second S-shaped steel bar, respectively.

[0008] Furthermore, the first S-shaped steel bar and the second S-shaped steel bar have a first bend in the lower arc-shaped portion. The first S-shaped steel bar and the second S-shaped steel bar have a second bend in the upper arc-shaped portion.

[0009] Furthermore, each end of the steel truss is supported by a tripod, and a support plate is welded to the bottom of the tripod. Short steel bars are welded and fixed to both sides of the tripod, and the short steel bars are parallel to the lower side of the tripod and have extensions corresponding to the inclined sides.

[0010] This invention has the following advantages: the spacing between the corresponding interlocking points of the first and second S-shaped reinforcing bars on both sides is unequal, and the spacing between the corresponding arc-shaped parts of the first S-shaped reinforcing bars is greater than that of the second S-shaped reinforcing bars. This allows the corresponding upper arc-shaped parts of the S-shaped reinforcing bars on both sides to interlock and form a cross-section, creating a support-like structure for supporting the upper chord reinforcing bars. During installation, the upper chord reinforcing bars can be directly placed at the cross-section, and then the contact points can be welded sequentially. This process of fixing the upper chord reinforcing bars first and then welding ensures that welding deviations are not allowed. Furthermore, the staggered S-shaped reinforcing bars improve the later stability of the truss reinforcing bars and reduce the likelihood of weld detachment. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0012] Figure 1 : Schematic diagram of the structure of this utility model.

[0013] Figure 2 : Schematic diagram of the splicing and installation structure of the first S-shaped steel bar and the second S-shaped steel bar of this utility model.

[0014] Figure 3 : Schematic diagram of the triangular bracket installation structure on the end side of the steel truss of this utility model.

[0015] Figure 4 : Schematic diagram of the steel truss arrangement structure of this utility model.

[0016] The components represented by each number in the attached diagram are listed below: base plate 1, steel truss 2, first S-shaped steel bar 3, second S-shaped steel bar 4, upper chord steel bar 21, lower chord steel bar 22, first bend 31, second bend 32, triangular frame 5, support plate 51, and short steel bar 52. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] like Figures 1-4As shown: The prefabricated fine aggregate concrete reinforced truss floor deck includes a concrete base slab 1, which is made of fine aggregate concrete with a thickness of about 20mm. The lower side of the base slab 1 is a flat side, and the upper side is embedded with multiple rows of steel trusses 2; specifically, there are 4 rows of steel trusses. The steel trusses are arranged in rows, parallel to each other, and extend from one end of the base slab to the other end, serving as the prefabricated steel reinforcement skeleton of the floor deck.

[0019] Each single-row steel truss 2 includes a first S-shaped steel bar 3 and a second S-shaped steel bar 4 on both sides. The lower arc-shaped parts of the first S-shaped steel bar 3 and the second S-shaped steel bar 4 are embedded in the base plate 1, and the upper arc-shaped parts are interlocked and form an intersection point. The first S-shaped steel bar and the second S-shaped steel bar are steel bars with an approximately S-shaped bend. The corresponding turning position is an arc transition. The side projection shows a structure of multiple horizontally spliced ​​isosceles triangles. The bottom arc-shaped part is a support part, embedded in the base plate, and the upper arc-shaped part is used for welding points.

[0020] Specifically, when the angle of the inclined steel bars on both sides of the upper arc section of the S-shaped steel bar is deviated, causing the corresponding upper arc sections to intersect each other, the corresponding inclined steel bars can form a cross contact point at the upper position.

[0021] The steel truss 2 also includes upper chord steel bars 21 and lower chord steel bars 22. The upper chord steel bars 21 are inserted and supported at the intersection points, and the contact sides of the upper chord steel bars 21 with the S-shaped steel bars on both sides are welded and fixed. There are two lower chord steel bars 22, which are welded and fixed to the lower arc-shaped sides of the first S-shaped steel bars 3 and the second S-shaped steel bars 4, respectively. The corresponding clamping distances of the first and second S-shaped steel bars on both sides are unequal, and the spacing of the corresponding arc-shaped parts of the first S-shaped steel bars is greater than that of the second S-shaped steel bars, so that the corresponding upper arc-shaped parts of the S-shaped steel bars on both sides can be interlocked to form an intersection and form a support-like structure for supporting the upper chord steel bars. During installation, the upper chord steel bars are placed directly at the intersection points, and then the contact points are welded sequentially. The process of fixing the upper chord steel bars first and then welding them ensures that there is no welding deviation during installation. At the same time, the staggered S-shaped steel bars can improve the later stability of the truss steel bars and reduce the likelihood of weld detachment.

[0022] like Figure 2As shown: The first S-shaped steel bar 3 and the second S-shaped steel bar 4 have a first bend 31 on their lower arc-shaped portions. The first bend is bent outwards as a whole, and the plane of the first bend is at an angle of approximately 30-40° to the plane of the S-shaped steel bar. This forms a planar support portion similar to a support foot, giving the whole a tilted angle. The corresponding upper arc-shaped portions can intersect each other, and the first bend is embedded in the bottom slab concrete, improving the stress resistance. The first S-shaped steel bar 3 and the second S-shaped steel bar 4 have a second bend 32 on their upper arc-shaped portions. The upper arc-shaped part of the S-shaped steel bar is used to highlight the S-shaped steel bar. Since the S-shaped steel bar is installed at an angle, the upper arc-shaped part is bent outward, which facilitates the later nesting of longitudinal steel bars. After the floor deck is installed, the upper steel truss is also used to install longitudinal steel bars. Traditionally, the steel bars are arranged and then tied with wire. The upper side of this S-shaped steel bar can also be used to install longitudinal steel bars by interlacing, making the installation of the upper steel bar skeleton more convenient and firm. The longitudinal steel bars are interlaced in the upper arc-shaped part of the corresponding S-shaped steel bar, and the intersection can be reinforced by tying.

[0023] like Figure 3 As shown: Triangular brackets 5 are installed on both ends of the steel truss 2 for support, and a support plate 51 is welded to the bottom of the triangular bracket 5. The triangular bracket is a steel structure, an isosceles triangle structure, with the support plate fixed on the lower side to maintain stability when placed in the pouring trough. The triangular bracket is used to elevate the overall steel truss, so that the part of the steel truss embedded in the bottom plate is kept uniform during the pouring process, and the phenomenon of exposed steel bars is prevented.

[0024] Short steel bars 52 are welded and fixed to both sides of the tripod 5. The short steel bars 52 are parallel to the lower side of the tripod 5 and have extensions corresponding to the inclined side. They are used to support the lower chord steel bars on both sides.

[0025] These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of this utility model, so that those skilled in the art can better understand and utilize this utility model.

Claims

1. Prefabricated fine aggregate concrete reinforced truss floor deck, characterized in that: It includes a concrete base slab (1), the lower side of which is a planar side, and the upper side is embedded with multiple rows of steel trusses (2); The single-row steel truss (2) includes a first S-shaped steel bar (3) and a second S-shaped steel bar (4) on both sides. The first S-shaped steel bar (3) and the second S-shaped steel bar (4) are embedded in the bottom plate (1) on the lower side of the corresponding arc-shaped part, and the upper arc-shaped parts are interlocked and form an intersection point. The steel truss (2) also includes an upper chord steel bar (21) and a lower chord steel bar (22). The upper chord steel bar (21) is inserted and supported at the intersection. The upper chord steel bar (21) is welded to the contact side of the S-shaped steel bars on both sides. There are two lower chord steel bars (22), which are welded to the arc-shaped side of the lower side of the first S-shaped steel bar (3) and the second S-shaped steel bar (4), respectively.

2. The prefabricated fine aggregate concrete reinforced truss floor slab according to claim 1, characterized in that: The first S-shaped steel bar (3) and the second S-shaped steel bar (4) have a first bend (31) on the lower side of the arc-shaped portion.

3. The prefabricated fine aggregate concrete reinforced truss floor slab according to claim 1, characterized in that: The first S-shaped steel bar (3) and the second S-shaped steel bar (4) have a second bend (32) on the upper arc-shaped part.

4. The prefabricated fine aggregate concrete reinforced truss floor slab according to claim 1, characterized in that: Each end of the steel truss (2) is supported by a tripod (5), and a support plate (51) is welded to the bottom of the tripod (5).

5. The fabricated fine pitch concrete reinforced trussed floor deck according to claim 4, characterized in that: The tripod (5) has short steel bars (52) welded and fixed on both sides. The short steel bars (52) are parallel to the lower side of the tripod (5) and have extensions corresponding to the inclined side.

Images