Single-truss double-face presser foot steel bar truss and prefabricated cavity wall

Abstract

The utility model relates to the technical field of formed reinforcement cages, in particular to a single-truss double-face presser foot steel bar truss and a prefabricated cavity wall. The single-truss double-face presser foot steel bar truss comprises a tie bar and a transverse bar which are integrated. In the length direction of the transverse ribs, a continuous tie rib is wound around the two transverse ribs distributed at intervals in a staggered mode. The single-truss double-sided presser foot steel bar truss of the scheme can be machined by adopting a steel bar bending automatic welding machine, the assembling process during site construction of a traditional steel bar cage is simplified, manpower is saved, due to the fact that the machine is adopted for direct machining, the forming precision of the whole single-truss double-sided presser foot steel bar truss is high, the workload of manual calibration is reduced when vertical bars are welded, and the production efficiency is improved. And the positioning error is reduced. The whole strength of the single-truss double-face presser foot steel bar truss is improved through the whole continuously-bent tie bar, when the single-truss double-face presser foot steel bar truss is used in a prefabricated cavity wall, the deformation resistance of the prefabricated cavity wall can be greatly improved, and when concrete is poured into cavities of the two concrete slabs, large deformation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of precast steel cage technology, specifically a single double-sided presser foot steel truss and a precast cavity wall. Background Technology

[0002] Precast hollow wall refers to a precast component consisting of a pre-formed steel cage and concrete formwork on both sides, with a hollow cavity in the middle. After the precast hollow wall is installed in place on site, concrete is poured into the cavity, and the precast hollow wall is integrated with the cast-in-place structure through connection structures and other measures.

[0003] Currently, the connection between the precast reinforced steel cage and the two concrete formwork shells of the precast cavity wall is achieved by anchoring the tie bars ① on the precast reinforced steel cage into the two concrete formwork shells ④ on both sides, such as... Figures 1 to 2 As shown, the existing precast steel cage requires manual welding and binding to assemble the horizontal bars ②, vertical bars ③, and tie bars ① into a whole. This requires a lot of manpower during installation, resulting in low production efficiency. It is also easy for cumulative errors to cause the positions of the horizontal bars ② and vertical bars ③ to deviate from the design, affecting the location of water and electricity pre-embedded parts. Even worse, due to the large dimensional deviation of the steel cage, it will affect the subsequent casting of the formwork, resulting in poor forming quality of the cavity wall and difficulty in meeting the factory standards. Utility Model Content

[0004] The purpose of this utility model is to propose a single-frame double-sided press-foot steel truss, which aims to solve the technical problems of low production efficiency and easy deviation in the overall position of the precast steel cage in the existing precast cavity wall.

[0005] To achieve the above objectives, this utility model proposes a single-frame double-sided presser foot steel truss, comprising an integral tie bar and transverse bars; along the length direction of the transverse bars, a continuous tie bar is alternately wound around two spaced transverse bars.

[0006] Preferably, one tie bar and two transverse bars form an assembly unit; the single double-sided presser foot steel truss is provided with multiple spaced assembly units along the vertical direction.

[0007] Preferably, the system further includes vertical ribs connected to the transverse ribs, and multiple vertical ribs are provided at intervals on each of the two transverse ribs along the length of the transverse ribs.

[0008] Preferably, the two transverse ribs distributed at intervals are the first transverse rib and the second transverse rib, respectively;

[0009] The tie bar includes multiple repeatedly arranged bending segments, each including a first bending segment, a second bending segment, a third bending segment, and a fourth bending segment connected end to end. The tie bar located outside the first transverse rib bends towards the second transverse rib to form the first bending segment, and the end of the first bending segment extends to the outside of the second transverse rib. The end of the first bending segment bends to form an upward or downward arched second bending segment. The second bending segment bends towards the first transverse rib to form the third bending segment. The end of the third bending segment bends to form an upward or downward arched fourth bending segment.

[0010] Preferably, the middle portion of the second bending segment and / or the fourth bending segment is bent to form at least one bending portion.

[0011] Preferably, the tie bar extends obliquely towards the direction of the second transverse bar to form the first bending segment, and the second bending segment extends obliquely towards the direction of the first transverse bar to form the third bending segment.

[0012] Preferably, the tie bar is welded to the transverse bar, and the transverse bar is welded to the vertical bar.

[0013] Preferably, the tie bars, the transverse bars, and the vertical bars are all steel bars.

[0014] In addition, this utility model also proposes a prefabricated cavity wall, including the above-mentioned single double-sided press-foot steel truss.

[0015] Preferably, the single double-sided presser bar truss has concrete slabs on both sides, and the tie bars are embedded in the concrete slabs on both sides.

[0016] The single-frame double-sided press-foot steel truss and precast hollow wall disclosed in this utility model have the following beneficial effects: The single-frame double-sided press-foot steel truss of this solution can be processed using existing automatic steel bar bending and welding machines, simplifying the assembly process during traditional steel cage construction and saving labor. Direct machine processing ensures high forming accuracy of the entire single-frame double-sided press-foot steel truss, reducing manual calibration work during welding of vertical bars, minimizing positioning errors, and saving manual positioning time. Since the tie bars are continuous bent steel bars, the overall strength of the single-frame double-sided press-foot steel truss of this solution is improved. During on-site construction, using the single-frame double-sided press-foot steel truss in the precast hollow wall results in high in-plane stiffness of the concrete slabs on both sides of the precast hollow wall, significantly increasing its resistance to deformation. Subsequent pouring of concrete into the cavities of the two concrete slabs can avoid large deformations, reducing the need for on-site reinforcement measures. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a prefabricated cavity wall in the prior art;

[0019] Figure 2 This is a schematic diagram of a pre-formed steel cage in the prior art;

[0020] Figure 3 This is a schematic diagram of the prefabricated cavity wall in this utility model;

[0021] Figure 4 This is a structural schematic diagram of the first embodiment of the single-frame double-sided press-foot steel truss in this utility model;

[0022] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0023] Figure 6 This is a front view of the first embodiment of the single-frame double-sided presser foot steel truss of this utility model;

[0024] Figure 7 This is a structural schematic diagram of the second embodiment of the single-frame double-sided press-foot steel truss in this utility model;

[0025] Figure 8 for Figure 7 A magnified view of a section at point B in the middle;

[0026] Figure 9 This is a front view of the second embodiment of the single-frame double-sided presser foot steel truss of this utility model;

[0027] Figure 10 This is a structural schematic diagram of the third embodiment of the single-frame double-sided press-foot steel truss in this utility model;

[0028] Figure 11 for Figure 10 A magnified view of a section at point C;

[0029] Figure 12 This is a front view of the third embodiment of the single-frame double-sided presser foot steel truss of this utility model;

[0030] Figure 13 This is a top view of a single double-sided presser foot steel truss in this utility model.

[0031] In the attached diagram: 1-Tie bar, 11-First bend section, 12-Second bend section, 13-Third bend section, 14-Fourth bend section, 15-Bend section, 2-Transverse bar, 21-First transverse bar, 22-Second transverse bar, 3-Vertical bar, 4-Concrete slab.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] like Figures 4 to 13 As shown, a single double-sided presser foot steel truss includes an integral tie bar 1 and transverse bars 2; along the length direction of the transverse bars 2, a continuous tie bar 1 is alternately wound around two spaced transverse bars 2.

[0037] In this design, the tie bar 1 is formed by bending a continuous steel bar multiple times. The tie bar 1 and two transverse bars 2 are automatically produced by an automatic steel bar bending and welding machine. Each contact point between the tie bar 1 and the two transverse bars 2 is automatically welded and fixed by the automatic steel bar bending and welding machine. Along the length of the transverse bars 2, the tie bar 1 is repeatedly wrapped around the two transverse bars 2 to form a (single double-sided presser foot) steel truss. The transverse bars 2 serve as the upper and lower chords of the single double-sided presser foot steel truss, while the tie bar 1 serves as the web member.

[0038] The single-frame double-sided press-foot steel truss of this scheme can be manufactured using existing automatic steel bar bending and welding machines. 1. This simplifies the assembly process of traditional steel cages during on-site construction, saving labor. 2. Due to direct machine processing, the forming accuracy of the entire single-frame double-sided press-foot steel truss is high. Even if vertical reinforcement bars 3 need to be welded later, the workload of manual calibration is significantly reduced, minimizing positioning errors during welding and saving manual positioning time. 3. Because the tie bar 1 is adjusted to a continuously bent single steel bar, rather than the traditional single independent tie bar structure, the overall strength of the single-frame double-sided press-foot steel truss of this scheme is improved. During on-site construction, the single-frame double-sided press-foot steel truss is used in the precast cavity wall. The high in-plane stiffness of the concrete slabs 4 on both sides of the precast cavity wall greatly increases the deformation resistance of the precast cavity wall. When pouring concrete into the cavities of the two concrete slabs 4 laterally, large deformations can be avoided, reducing the need for on-site reinforcement measures.

[0039] Furthermore, one tie bar 1 and two transverse bars 2 form an assembly unit; the single double-sided presser foot steel truss is provided with multiple spaced assembly units along the vertical direction.

[0040] In this embodiment, an assembly unit is composed of one tie bar 1 and two transverse bars 2. Each layer of a single double-sided presser foot steel truss is provided with an assembly unit. Along the vertical direction, a single double-sided presser foot steel truss can be provided with more than 10 spaced assembly units. The number of assembly units can be increased or decreased adaptively in different usage scenarios.

[0041] Furthermore, it also includes vertical ribs 3 connected to the transverse ribs 2, and multiple vertical ribs 3 are respectively arranged at intervals on the two transverse ribs 2 along the length direction of the transverse ribs 2.

[0042] To further enhance the structural stability of the single-frame double-sided press-foot steel truss, this embodiment adds multiple vertical reinforcing bars 3. These vertical reinforcing bars 3 are fixed to the horizontal reinforcing bars 2, and each horizontal reinforcing bar 2 has multiple spaced vertical reinforcing bars 3. Typically, the vertical reinforcing bars 3 on both sides are symmetrically positioned. The tie bars 1 and horizontal reinforcing bars 2 in each assembly unit are processed by an automatic steel bar bending and welding machine. The vertical reinforcing bars 3 are usually welded directly to the horizontal reinforcing bars 2 on a flat construction site. Since the positions of the horizontal reinforcing bars 2 and tie bars 1 are already fixed and the processing accuracy is high, the vertical reinforcing bars 3 can be directly welded to the horizontal reinforcing bars 2. Unlike traditional steel cages, there is no need to frequently check the spacing between the two horizontal reinforcing bars 2, reducing the workload of manual calibration.

[0043] Furthermore, the two transverse ribs 2 that are spaced apart are respectively the first transverse rib 21 and the second transverse rib 22;

[0044] The tie bar 1 includes multiple repeatedly arranged bent segments, each including a first bent segment 11, a second bent segment 12, a third bent segment 13, and a fourth bent segment 14 connected end to end. The tie bar 1 located outside the first transverse rib 21 is bent towards the second transverse rib 22 to form the first bent segment 11, and the end of the first bent segment 11 extends to the outside of the second transverse rib 22. The end of the first bent segment 11 is bent to form the second bent segment 12, which is arched upward or downward. The second bent segment 12 is bent towards the first transverse rib 21 to form the third bent segment 13. The end of the third bent segment 13 is bent to form the fourth bent segment 14, which is arched upward or downward.

[0045] Along the length of the tie bar 1, there are multiple repeating units—bending segments. Each bending segment includes a first bending segment 11, a second bending segment 12, a third bending segment 13, and a fourth bending segment 14 connected in sequence. The first end of the tie bar 1 is connected to the first bending segment 11. The first bending segment 11 and the third bending segment 13 span two transverse bars 2. The second bending segment 12 and the fourth bending segment 14 are the pressers extending from the transverse bars 2, and can also play a certain role in tie anchoring. The two transverse bars 2 are connected by the above bending segments.

[0046] like Figures 4 to 9 As shown, in different embodiments, the bending direction of the second bending segment 12 and the fourth bending segment 14 can be adjusted. For example, both the second bending segment 12 and the fourth bending segment 14 can arch upwards, or one can arch upwards and the other can arch downwards. On the orthographic projection plane, the shape of the second bending segment 12 and the fourth bending segment 14 can also be adjusted. For example, the second bending segment 12 and the fourth bending segment 14 can be a trapezoidal shape without a bottom edge, or a triangular shape without a bottom edge.

[0047] It should be noted that during actual installation, the first bending segment 11, the second bending segment 12, and the third bending segment 13, together with the concrete slabs 4 on both sides, form an installation space, within which at least one vertical reinforcing bar 3 can be installed. Similarly, the third bending segment 13, the fourth bending segment 14, the next first bending segment 11, and the concrete slabs 4 on both sides together form an installation space, within which at least one vertical reinforcing bar 3 can be installed.

[0048] Furthermore, the middle portion of the second bending segment 12 and / or the fourth bending segment 14 is bent to form at least one bending portion 15. For example... Figures 10 to 12 As shown, additional bending portions 15 can be provided on the second bending segment 12 and the fourth bending segment 14. Since the second bending segment 12 and the fourth bending segment 14 are embedded in the concrete slab 4 during the subsequent fabrication of the precast cavity wall, providing bending portions 15 on the second bending segment 12 and the fourth bending segment 14 can extend the length of the second bending segment 12 and the fourth bending segment 14, increase the contact area with the concrete slab 4, and further improve the anchoring effect of the concrete slab 4 on the formed steel cage.

[0049] Furthermore, the tie bar 1 extends obliquely towards the second transverse bar 22 to form the first bent section 11, and the second bent section 12 extends obliquely towards the first transverse bar 21 to form the third bent section 13. Compared with the hollow truss composed of tie bars and transverse bars in the pre-formed steel cage of the prior art, the tie bar 1 in this embodiment is obliquely arranged and forms a single truss with two spaced transverse bars 2, which has greater stiffness and can greatly reduce the risk of formwork bursting during on-site concrete pouring.

[0050] Furthermore, the tie bar 1 is welded and fixed to the transverse bar 2, and the transverse bar 2 is welded and fixed to the vertical bar 3.

[0051] The single-frame double-sided presser foot steel truss structure of this scheme can be automatically produced by an existing steel bar bending and welding machine to produce two horizontal bars 2 and a continuously bent tie bar 1 wrapped around the two horizontal bars 2. During subsequent assembly, only the vertical bars 3 need to be welded to form a complete single-frame double-sided presser foot steel truss structure.

[0052] Furthermore, the tie bar 1, the transverse bar 2, and the vertical bar 3 are all steel bars. The tie bar 1, transverse bar 2, and vertical bar 3 are all steel bars, which have the advantages of high strength and corrosion resistance, ensuring a long service life for a single double-sided press-foot steel truss; at the same time, steel bars are easy to process and can be processed into single double-sided press-foot steel trusses of any required size.

[0053] In particular, this utility model also proposes a precast cavity wall, including the above-mentioned single-span double-sided presser steel truss. This precast cavity wall includes any of the above-mentioned single-span double-sided presser steel trusses, and therefore has the same beneficial effects as the above-mentioned steel cages, which will not be elaborated further here.

[0054] Furthermore, both sides of the single double-sided presser bar truss are provided with concrete slabs 4, and the tie bars 1 are partially embedded in the concrete slabs 4 on both sides.

[0055] like Figure 3 As shown, the single-frame double-sided reinforcing steel truss of this scheme can serve as a reinforcing cage for traditional reinforced concrete walls or as a reinforcing cage for precast hollow walls. During load-bearing wall construction, after the single-frame double-sided reinforcing steel truss and the concrete slabs 4 on both sides are installed, concrete is poured into the cavities of the two concrete slabs 4, quickly forming the precast hollow wall of this scheme, which can be used as a building structure for reinforced concrete walls.

[0056] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A single-web double-faced footbar truss, characterized by, The single-column double-face presser bar steel truss comprises integral tie bars (1) and transverse bars (2), along the length direction of the transverse bars (2), a continuous tie bar (1) is arranged on two transverse bars (2) which are spaced apart, The two transverse bars (2) are a first transverse bar (21) and a second transverse bar (22) respectively. The tie bar (1) comprises a plurality of repeatedly arranged bending sections, the bending sections comprise a first bending section (11), a second bending section (12), a third bending section (13) and a fourth bending section (14) which are connected in sequence, the tie bar (1) located outside the first transverse bar (21) is bent to form the first bending section (11) towards the second transverse bar (22), and the end of the first bending section (11) extends outside the second transverse bar (22); the end of the first bending section (11) is bent to form the second bending section (12) which arches upwards or downwards; the second bending section (12) is bent to form the third bending section (13) towards the first transverse bar (21); the end of the third bending section (13) is bent to form the fourth bending section (14) which arches upwards or downwards.

2. A single-bay double-sided footbar truss according to claim 1, characterized in that, One tie bar (1) and two transverse bars (2) constitute an assembly unit; the single-column double-face presser bar steel truss is provided with a plurality of spaced-apart assembly units in the vertical direction.

3. A single-bay double-sided footbar truss according to claim 1 or 2, characterized in that The single-column double-face presser bar steel truss further comprises vertical bars (3) connected with the transverse bars (2), along the length direction of the transverse bars (2), a plurality of vertical bars (3) are arranged on the two transverse bars (2) respectively and are spaced apart.

4. A single-bay double-sided footbar truss according to claim 1, wherein The middle part of the second bending section (12) and / or the fourth bending section (14) is bent to form at least one bending part (15).

5. A single-bay double-sided footbar truss according to claim 1, wherein The tie bar (1) extends obliquely to form the first bending section (11) towards the second transverse bar (22), and the second bending section (12) extends obliquely to form the third bending section (13) towards the first transverse bar (21).

6. A single-bay double-sided footbar truss according to claim 3, wherein The tie bar (1) is welded and fixed with the transverse bar (2), and the transverse bar (2) is welded and fixed with the vertical bar (3).

7. A single-bay double-sided footbar truss according to claim 3, wherein The tie bar (1), the transverse bar (2) and the vertical bar (3) are all steel bars.

8. A precast cavity wall, characterised in that, The single-column double-face presser bar steel truss comprises the single-column double-face presser bar steel truss according to any one of claims 1-7.

9. A precast cavity wall according to claim 8, wherein, Both sides of the single-column double-face presser bar steel truss are provided with concrete slabs (4), and the tie bar (1) is partially embedded in the concrete slabs (4) on both sides.

Images