Plane steel bar truss and prefabricated cavity shear wall

Abstract

The utility model relates to the technical field of steel bar trusses, in particular to a plane steel bar truss and a prefabricated cavity shear wall. The plane steel bar truss comprises a connecting unit, and the connecting unit comprises a plurality of transverse connecting bar sets and a plurality of plane steel bar truss sets. Each transverse connecting rib group comprises a first transverse connecting rib and a second transverse connecting rib which are arranged in parallel at an interval; each plane steel bar truss group comprises a first longitudinal connecting rib and a second longitudinal connecting rib which are arranged in parallel at an interval; the plane steel bar truss further comprises tie bars, and each first longitudinal connecting bar and each second longitudinal connecting bar are continuously wound with the tie bars in a staggered mode. According to the tie bar, an original presser foot is omitted, and placement of the water and electricity pre-embedded wire box cannot be affected during construction; and the tie bars are adjusted to be vertically arranged, and the adjacent tie bars are distributed at intervals, so that the concrete can be vibrated by the vibration rod more conveniently.

Description

Technical Field

[0001] This utility model relates to the field of steel truss technology, specifically a planar steel truss and a precast hollow shear 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] This solution is an improvement based on the patent CN202520162562.X "A Single Double-Sided Press-Foot Steel Truss and Precast Cavity Wall". The above patent has the following two main pain points in practical application: First, when the second and fourth bend sections are used as press-foot sections, they are prone to conflict with the water and electricity pre-embedded boxes, affecting the normal construction effect; Second, because the tie bars in the steel truss are placed horizontally, the web bars (i.e. tie bars) of the steel truss will obstruct the vibrator for vibrating concrete during on-site construction. Utility Model Content

[0004] The purpose of this utility model is to propose a planar steel truss and a precast cavity shear wall, which aims to solve the technical problems that the existing single-frame double-sided press-foot steel truss is prone to conflict with the water and electricity pre-embedded boxes and also hinders the vibrator for vibrating concrete.

[0005] To achieve the above objectives, this utility model proposes a planar steel truss, including a connecting unit, which includes multiple sets of transversely spaced transverse connecting bars and multiple sets of vertically spaced planar steel trusses.

[0006] Each group of transverse connecting bars includes two spaced and parallel first transverse connecting bars and second transverse connecting bars. Each group of planar steel trusses includes two spaced and parallel first longitudinal connecting bars and second longitudinal connecting bars. The first longitudinal connecting bar is located on one side of the first transverse connecting bar, and the second longitudinal connecting bar is located on one side of the second transverse connecting bar.

[0007] The planar steel truss also includes tie bars, with each of the first longitudinal connecting bars and each of the second longitudinal connecting bars continuously and alternately wrapped with the tie bars.

[0008] Preferably, the tie bar includes multiple repeatedly arranged bending segments, each bending segment including a first bending segment, a second bending segment, a third bending segment, and a fourth bending segment connected end to end. The first end of the tie bar is located outside the first longitudinal connecting bar. The tie bar is bent towards the second longitudinal connecting bar to form the first bending segment, so that the end of the first bending segment extends to the outside of the second longitudinal connecting bar. The end of the first bending segment extends vertically downward to form the second bending segment. The end of the second bending segment is then bent towards the first longitudinal connecting bar to form the third bending segment. The end of the third bending segment extends vertically downward to form the fourth bending segment.

[0009] Preferably, the tie bar is bent downwards towards the direction of the second longitudinal connecting bar to form the first bent section, such that the height of the first end of the first bent section is greater than the height of the end of the first bent section;

[0010] The end of the second bending segment is bent downwards towards the first longitudinal connecting rib to form the third bending segment, such that the height of the first end of the third bending segment is greater than the height of the end of the third bending segment.

[0011] Preferably, the top end of the tie bar extends vertically upward to form a first elongated section, and the bottom end of the tie bar extends vertically downward to form a second elongated section.

[0012] Preferably, the first longitudinal connecting bar and the second longitudinal connecting bar are disposed between the first transverse connecting bar and the second transverse connecting bar.

[0013] Preferably, the tie bar is integrally formed with the first longitudinal connecting bar and the second longitudinal connecting bar; the planar steel truss is welded and fixed to the first transverse connecting bar and the second transverse connecting bar.

[0014] Preferably, the transverse connecting bar group, the first longitudinal connecting bar, the second longitudinal connecting bar, and the tie bar are all steel bars.

[0015] In addition, this utility model also proposes a precast cavity shear wall, including the above-mentioned planar steel truss, and concrete slabs are provided on both sides of the planar steel truss, with the tie bars embedded in the two concrete slabs on both sides respectively.

[0016] The planar steel truss and precast hollow shear wall disclosed in this utility model have the following beneficial effects: The tie bars in this design are formed by repeatedly bending a continuous steel bar, and are repeatedly and alternately wrapped around the connecting unit along its height. First, the tie bars eliminate the original pressure feet, making the overall structure simpler and not affecting the placement of pre-embedded electrical and plumbing boxes during construction. Second, the entire planar steel truss is on a single plane, and the tie bars are adjusted to be vertically arranged, with each adjacent tie bar spaced apart, making it easier to use a vibrator to compact the concrete. 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 schematic diagram of the planar steel truss structure of this utility model;

[0019] Figure 2 This is a side view of the planar steel truss structure of this utility model;

[0020] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0021] Figure 4 This is a top view schematic diagram of the planar steel truss structure of this utility model;

[0022] Figure 5 This is a structural schematic diagram of the prefabricated cavity shear wall of this utility model.

[0023] In the attached diagram: 1-Connecting unit, 11-Transverse connecting bar group, 111-First transverse connecting bar, 112-Second transverse connecting bar, 12-Planar steel truss, 121-First longitudinal connecting bar, 122-Second longitudinal connecting bar, 123-Tie bar, 1231-First bending segment, 1232-Second bending segment, 1233-Third bending segment, 1234-Fourth bending segment, 1235-First elongated segment, 1236-Second elongated segment, 2-Concrete slab.

[0024] 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

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figures 1 to 4 As shown, a planar steel truss includes a connecting unit 1, which includes multiple sets of transversely spaced transverse connecting bars 11 and multiple sets of vertically spaced planar steel trusses 12.

[0029] Each group of transverse connecting bars 11 includes two spaced and parallel first transverse connecting bars 111 and second transverse connecting bars 112. Each group of planar steel trusses 12 includes two spaced and parallel first longitudinal connecting bars 121 and second longitudinal connecting bars 122. The first longitudinal connecting bar 121 is located on one side of the first transverse connecting bar 111, and the second longitudinal connecting bar 122 is located on one side of the second transverse connecting bar 112.

[0030] The planar steel truss 12 also includes tie bars 123, and each of the first longitudinal connecting bars 121 and each of the second longitudinal connecting bars 122 is continuously and alternately wrapped with the tie bars 123.

[0031] In this design, the tie bar 123 is formed by repeatedly bending a continuous steel bar. Along the height direction (i.e., the vertical direction) of the connecting unit 1, the tie bar 123 is repeatedly and alternately wrapped around the first longitudinal connecting bar 121 and the second longitudinal connecting bar 122. First, the tie bar 123 eliminates the original pressure foot, making the overall structure simpler and not affecting the placement of the water and electricity pre-embedded boxes during construction. Second, the entire planar steel truss is on a single plane, and the tie bar 123 is adjusted to be vertically arranged, with each adjacent tie bar 123 spaced apart, i.e., there is a gap between adjacent tie bars 123, which makes it easier to use a vibrator to vibrate the concrete.

[0032] Furthermore, the tie bar 123 includes multiple repeatedly arranged bending segments, each bending segment including a first bending segment 1231, a second bending segment 1232, a third bending segment 1233, and a fourth bending segment 1234 connected end to end. The first end of the tie bar 123 is located outside the first longitudinal connecting bar 121. The tie bar 123 bends towards the second longitudinal connecting bar 122 to form the first bending segment 1231, so that the end of the first bending segment 1231 extends to the outside of the second longitudinal connecting bar 122. The end of the first bending segment 1231 extends vertically downward to form the second bending segment 1232. The end of the second bending segment 1232 bends again towards the first longitudinal connecting bar 121 to form the third bending segment 1233. The end of the third bending segment 1233 extends vertically downward to form the fourth bending segment 1234.

[0033] In this embodiment, as Figures 1 to 4 As shown, the tie bar 123 is bent towards the direction of the second longitudinal connecting bar 122 to form a first bent segment 1231, with the end of the first bent segment 1231 extending to the outside of the second longitudinal connecting bar 122; the end of the first bent segment 1231 extends vertically downward to form a second bent segment 1232; the end of the second bent segment 1232 is then bent towards the direction of the first longitudinal connecting bar 121 to form a third bent segment 1233; the end of the third bent segment 1233 extends vertically downward to form a fourth bent segment 1234. In this way, the tie bar 123 can be better fixed with the longitudinal connecting bar group 12, so that the entire connection unit 1 has a higher connection strength.

[0034] Furthermore, the bending segments of the tie bar 123 are repeatedly set. For example, each tie bar 123 can be set with 7-8 sets of repeated bending segments. The number of bending segments is mainly adjusted adaptively according to the height of the connection unit 1.

[0035] Furthermore, the tie bar 123 is bent downwards towards the direction of the second longitudinal connecting bar 122 to form the first bent section 1231, such that the height of the first end of the first bent section 1231 is greater than the height of the end of the first bent section 1231.

[0036] The end of the second bending segment 1232 is bent downwards towards the first longitudinal connecting rib 121 to form the third bending segment 1233, such that the height of the first end of the third bending segment 1233 is greater than the height of the end of the third bending segment 1233.

[0037] When the tie bar 123 is fixed in the above-mentioned way, when the planar steel truss 12 is fixed to the transverse connecting bar group 11, the first end of the first bent section 1231 can be fixed above the first transverse connecting bar 111, and the end of the first bent section after the incline bend can be fixed below the second transverse connecting bar 112. Similarly, the first end of the third bent section 1233 is fixed above the second transverse connecting bar 112, and the end of the third bent section after the incline bend is fixed below the first transverse connecting bar 111. This can better distribute the load to the first transverse connecting bar 111 and the second transverse connecting bar 112 when under stress.

[0038] Furthermore, the top end of the tie bar 123 extends vertically upward to form a first elongated section 1235, and the bottom end of the tie bar 123 extends vertically downward to form a second elongated section 1236. The first elongated section 1235 and the second elongated section 1236 are also embedded in the concrete slab 2 below, thereby improving the connection strength between the entire planar steel truss and the concrete slab 2.

[0039] Furthermore, the first longitudinal connecting bar 121 and the second longitudinal connecting bar 122 are disposed between the first transverse connecting bar 111 and the second transverse connecting bar 112. The first transverse connecting bar 111 and the second transverse connecting bar 112 are spaced apart, with an installation space between them. Both the first longitudinal connecting bar 121 and the second longitudinal connecting bar 122 are located within this installation space, with the first longitudinal connecting bar 121 attached to the front side of the first transverse connecting bar 111 and the second longitudinal connecting bar 122 attached to the rear side of the first transverse connecting bar 111. In this way, a spatial planar steel truss system is formed, in which the planar steel truss 12 and the transverse connecting bar group 11 jointly constrain the internal concrete, thereby improving the strength of the precast cavity shear wall.

[0040] Furthermore, the tie bar 123 is integrally formed with the first longitudinal connecting bar 121 and the second longitudinal connecting bar 122; the planar steel truss is welded and fixed to the first transverse connecting bar 111 and the second transverse connecting bar 112.

[0041] In the planar steel truss structure of this scheme, the first longitudinal connecting bar 121, the second longitudinal connecting bar 122 and the tie bar 123 are integrally formed into a planar steel truss 12 using special equipment. Then, multiple sets of planar steel trusses 12 and multiple sets of transverse connecting bar groups 11 are manually welded into a steel cage to fix multiple sets of transversely spaced transverse connecting bar groups 11 in place. The connection relationship of the entire connection unit 1 is relatively stable.

[0042] Of course, in other embodiments, welding may not be used for fixing; instead, the transverse connecting bar group 11 may be tied and fixed to the planar steel truss 12 with wire.

[0043] Furthermore, the transverse connecting bar group 11, the first longitudinal connecting bar 121, the second longitudinal connecting bar 122, and the tie bar 123 are all steel bars. The tie bar 123, the first transverse connecting bar 111 and the second transverse connecting bar 112, the first longitudinal connecting bar 121 and the second longitudinal connecting bar 122 of the transverse connecting bar group 11 are all steel bars, which have the advantages of high strength and corrosion resistance, and can ensure a long service life of the planar steel truss 12; at the same time, steel bars are also easy to process and can be processed into planar steel trusses of any required size.

[0044] Specifically, this utility model also proposes a precast cavity shear wall, including the aforementioned planar steel truss, with concrete slabs 2 on both sides of the planar steel truss, and the tie bars 123 are respectively embedded in the two concrete slabs 2 on both sides. This precast cavity shear wall includes any of the aforementioned planar steel trusses, and therefore has the same beneficial effects as the aforementioned planar steel trusses, which will not be elaborated further here. Figure 5 As shown, during the construction of the load-bearing wall, after the planar steel truss and the concrete slabs 2 on both sides are installed in place, concrete is poured into the cavity of the two concrete slabs 2 to quickly form the precast cavity shear wall of this scheme, which can be used as a building structure of reinforced concrete wall. Typically, the second bend 1232 and the fourth bend 1234 of the tie bar 123 are embedded in the concrete slabs 2 on both sides respectively.

[0045] 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 planar steel truss, characterized in that, include: The connecting unit (1) includes multiple sets of transversely spaced transverse connecting bars (11) and multiple sets of vertically spaced planar steel trusses (12); Each group of transverse connecting bars (11) includes two spaced and parallel first transverse connecting bars (111) and second transverse connecting bars (112), and each group of planar steel trusses (12) includes two spaced and parallel first longitudinal connecting bars (121) and second longitudinal connecting bars (122), and the first longitudinal connecting bar (121) is located on one side of the first transverse connecting bar (111), and the second longitudinal connecting bar (122) is located on one side of the second transverse connecting bar (112); The planar steel truss (12) also includes tie bars (123), and each of the first longitudinal connecting bars (121) and each of the second longitudinal connecting bars (122) is continuously and alternately wrapped with the tie bars (123).

2. A planar steel truss according to claim 1, characterized in that, The tie bar (123) includes multiple repeatedly arranged bent segments, each bent segment including a first bent segment (1231), a second bent segment (1232), a third bent segment (1233), and a fourth bent segment (1234) connected end-to-end. The first end of the tie bar (123) is located outside the first longitudinal connecting bar (121). The tie bar (123) is bent towards the second longitudinal connecting bar (122) to form the first bent segment (1231), so that the... The end of the first bending segment (1231) extends to the outside of the second longitudinal connecting rib (122); the end of the first bending segment (1231) extends vertically downward to form the second bending segment (1232); the end of the second bending segment (1232) bends again towards the first longitudinal connecting rib (121) to form the third bending segment (1233); the end of the third bending segment (1233) extends vertically downward to form the fourth bending segment (1234).

3. A planar steel truss according to claim 2, characterized in that, The tie bar (123) is bent downwards towards the direction of the second longitudinal connecting bar (122) to form the first bent segment (1231), so that the height of the first end of the first bent segment (1231) is greater than the height of the end of the first bent segment (1231); The end of the second bending segment (1232) is bent downwards towards the first longitudinal connecting rib (121) to form the third bending segment (1233), such that the height of the first end of the third bending segment (1233) is greater than the height of the end of the third bending segment (1233).

4. A planar steel truss according to claim 1, characterized in that, The top end of the tie bar (123) extends vertically upward to form a first elongated section (1235), and the bottom end of the tie bar (123) extends vertically downward to form a second elongated section (1236).

5. A planar steel truss according to claim 1, characterized in that, The first longitudinal connecting bar (121) and the second longitudinal connecting bar (122) are disposed between the first transverse connecting bar (111) and the second transverse connecting bar (112).

6. A planar steel truss according to claim 1, characterized in that, The tie bar (123) is integrally formed with the first longitudinal connecting bar (121) and the second longitudinal connecting bar (122); The planar steel truss (12) is welded and fixed to the first transverse connecting bar (111) and the second transverse connecting bar (112).

7. A planar steel truss according to claim 1, characterized in that, The transverse connecting bar group (11), the first longitudinal connecting bar (121), the second longitudinal connecting bar (122), and the tie bar (123) are all steel bars.

8. A precast hollow shear wall, characterized in that, The planar steel truss as described in any one of claims 1-7 is provided on both sides of the planar steel truss, and the tie bars (123) are respectively embedded in the two concrete slabs (2) on both sides.

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