A modular integrated building connection structure

Abstract

This utility model relates to the field of modular integrated building technology, and more particularly to a connection structure for modular integrated buildings. The concrete modules of the modular integrated building include a precast base slab, a precast top slab, and multiple precast side wall panels arranged in a hexahedral layout. The connection structure includes multiple sets of connection components. Each connection component includes fixed reinforcing bars embedded in the precast side wall panels and embedded steel plates embedded in the end faces of the precast side wall panels. Two adjacent precast side wall panels are connected by welding the embedded steel plates on their respective end faces. The advantages are that the precast side wall panels are quickly connected using embedded steel plates, avoiding the need for lapped reinforcement connections in the later-cast sections. Welding the embedded steel plates can replace the lapped reinforcement in the later-cast sections, reducing the amount of lateral formwork used in the molds for producing concrete modules. This allows for more flexible disassembly of the modular integrated building into individual wall panel components, significantly reducing the production difficulty in complex structural locations.

Description

Technical Field

[0001] This utility model relates to the field of modular integrated building technology, and in particular to a connection structure for modular integrated buildings. Background Technology

[0002] Modular integrated construction is an industrialized construction model that breaks down a building into standardized functional modules, completes the high-precision prefabrication of the structure, decoration, and equipment systems in the factory, and then transports them to the site for rapid assembly. Through 3D design, the building is divided into concrete modules (such as room and kitchen / bathroom modules). More than 90% of the processes (including steel structure welding, concrete pouring, pipeline pre-laying, and intelligent equipment integration) are completed on the factory assembly line. The modules are then transported to the construction site by truck or rail and assembled using large machinery, requiring only 10% on-site work to complete the overall building.

[0003] In the existing technology, concrete modules are formed by splicing together several prefabricated side wall panels. However, the connection structure between different prefabricated side wall panels needs to occupy a certain space during the splicing process. Therefore, the connection structure between the connected prefabricated side wall panels needs to be poured a second time to fill the space of the connection structure and form an integral module. As a result, the second pouring will affect the module forming time and slow down the progress of the overall building.

[0004] Therefore, there is an urgent need for a modular integrated building connection structure that allows the connection between adjacent prefabricated side wall panels to be completed without the need for secondary pouring. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a connection structure for modular integrated buildings, which solves the technical problem that the connection structure between existing prefabricated side wall panels requires secondary pouring.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] This utility model embodiment provides a connection structure for a modular integrated building. The concrete modules of the modular integrated building include a precast base slab, a precast top slab, and multiple precast side wall panels arranged in a hexahedral layout. The connection structure includes multiple sets of connection components. The connection components include fixed reinforcing bars embedded in the precast side wall panels and embedded steel plates embedded in the end faces of the precast side wall panels. One end of the fixed reinforcing bar is fixedly connected to the embedded steel plate. Two adjacent precast side wall panels are welded together through the embedded steel plates on their respective end faces.

[0010] Optionally, the multiple prefabricated sidewall panels include a first prefabricated sidewall panel, a second prefabricated sidewall panel, a third prefabricated sidewall panel, and a fourth prefabricated sidewall panel, wherein: the first prefabricated sidewall panel and the third prefabricated sidewall panel are both bent and located on two perpendicular facades; one end of the first prefabricated sidewall panel is connected to one end of the second prefabricated sidewall panel, and the other end of the fourth prefabricated sidewall panel is connected to one end of the first prefabricated sidewall panel; the other end of the second prefabricated sidewall panel is connected to one end of the third prefabricated sidewall panel; and the other end of the third prefabricated sidewall panel is connected to one end of the fourth prefabricated sidewall panel, all by welding together with embedded steel plates in their respective end faces.

[0011] Optionally, the embedded steel plate is one of a first embedded steel plate and a second embedded steel plate. The first embedded steel plate is flat and its surface is coplanar with the wall surface of the precast side wall panel it is located on. The second embedded steel plate is L-shaped and its two surfaces are coplanar with the two vertical wall surfaces of the precast side wall panel it is located on. The two adjacent precast side wall panels are connected by a first embedded steel plate assembly formed by welding the two first embedded steel plates together. Alternatively, the two adjacent precast side wall panels are connected by a second embedded steel plate assembly formed by welding the first embedded steel plate and the second embedded steel plate together.

[0012] Optionally, one end of the first prefabricated side wall panel is connected to one end of the second prefabricated side wall panel, and the other end of the fourth prefabricated side wall panel is connected to one end of the first prefabricated side wall panel through a first embedded steel plate assembly. The two first embedded steel plates in the first embedded steel plate assembly are welded together by exposing welding positions on the end faces of their respective prefabricated side wall panels.

[0013] Optionally, the other end of the second precast side wall panel is connected to one end of the third precast side wall panel, and the other end of the third precast side wall panel is connected to one end of the fourth precast side wall panel via a second embedded steel plate assembly. The L-shaped second embedded steel plate is composed of a first straight plate and a second straight plate that are perpendicularly connected. The inner surface of the first straight plate is fixedly connected to a fixing reinforcing bar, and the second straight plate is welded to the first embedded steel plate. The fixing reinforcing bar is parallel to the connection surface of the second straight plate and the first embedded steel plate.

[0014] Optionally, the distance between multiple embedded steel plates on the end face of a prefabricated side wall panel is in the range of 350mm-500mm.

[0015] Optionally, a steel mesh is pre-embedded in the precast side wall panel, and the fixing steel bars are fixedly connected to the steel mesh.

[0016] Alternatively, the embedded steel plate and the fixed reinforcing bar are fixedly connected by welding angle iron at their joint.

[0017] Optionally, the thickness of the embedded steel plate is in the range of 8mm-12mm, the height of the embedded steel plate is in the range of 80mm-120mm, and the height of the two corresponding embedded steel plates is the same.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are as follows: This utility model provides a connection structure for a modular integrated building. The concrete modules of the modular integrated building include a precast base slab, a precast top slab, and multiple precast side wall panels arranged in a hexahedral layout. The connection structure includes multiple sets of connection components. Each connection component includes fixed reinforcing bars embedded in the precast side wall panels and embedded steel plates embedded in the end faces of the precast side wall panels. One end of the fixed reinforcing bar is fixedly connected to the embedded steel plate. Two adjacent precast side wall panels are connected by welding the embedded steel plates on their respective end faces. Compared to existing technologies, the use of embedded steel plates for rapid connection between precast side wall panels avoids the need for lapped reinforcement connections in post-cast sections. Welding the embedded steel plates can replace the lapped reinforcement in post-cast sections, reducing the amount of lateral formwork used in the molds for producing concrete modules. This allows for more flexible disassembly of the modular integrated building into individual wall panel components, significantly reducing the production difficulty in complex structural locations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection structure of the modular integrated building of this utility model, according to Embodiment 1.

[0021] Figure 2 for Figure 1 A partial structural diagram of the connection structure of the modular integrated building at the connection between the fourth prefabricated side wall panel and the first prefabricated side wall panel is shown.

[0022] Figure 3 for Figure 1 A front view of the first embedded steel plate assembly and its fixing reinforcing bars in the connection structure of the modular integrated building is shown.

[0023] Figure 4 This is a partial structural diagram of the connection between the fourth prefabricated side wall panel and the first prefabricated side wall panel in Embodiment 2 of the modular integrated building connection structure of this utility model.

[0024] Figure 5 for Figure 4 The diagram shows a front view of the second embedded steel plate assembly and its fixing reinforcing bars in the connection structure of a modular integrated building.

[0025] [Explanation of Labels in the Attached Image]

[0026] 1: Fix the reinforcing bars;

[0027] 2: Embedded steel plate; 21: First embedded steel plate; 22: Second embedded steel plate;

[0028] 3: Precast side wall panel; 31: First precast side wall panel; 32: Second precast side wall panel; 33: Third precast side wall panel; 34: Fourth precast side wall panel;

[0029] 4: First embedded steel plate assembly;

[0030] 5: Second embedded steel plate assembly;

[0031] 6: Steel mesh. Detailed Implementation

[0032] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1:

[0034] Reference Figures 1 to 3 This embodiment provides a connection structure for a modular integrated building, used to connect precast side wall panels 3 that connect in a concrete module. The concrete module of the modular integrated building includes a precast base slab, a precast top slab, and multiple precast side wall panels 3 arranged in a hexahedral layout. Specifically, the connection structure of the modular integrated building in this embodiment includes multiple sets of connection components, which are detailed below.

[0035] In this embodiment, the connecting components include a fixed reinforcing bar 1 embedded in the precast side wall panel 3 and a precast steel plate 2 embedded in the end face of the precast side wall panel 3. One end of the fixed reinforcing bar 1 is fixedly connected to the precast steel plate 2. The two adjacent precast side wall panels 3 are connected by welding through the precast steel plates 2 on their respective end faces. The modular integrated building is a building formed by splicing multiple concrete modules along the horizontal and vertical directions. The concrete module is a hexahedron shape with six sides. The concrete module is formed by splicing precast wall panels, and the precast top slab and precast bottom slab are connected to the top and bottom of the concrete module by pouring concrete. (Refer to...) Figure 1 The embedded steel plates 2 are located on the end faces of different precast side wall panels 3. The embedded steel plates 2 on the end faces of two connected precast side wall panels 3 correspond one-to-one. One end of the fixing steel bar 1 is located inside the precast side wall panel 3, and the other end is located on the end face of the precast side wall panel 3. It is fixedly connected to the embedded steel plates 2 by welding, screwing or snapping. By welding the edges of the corresponding embedded steel plates 2, the two connected precast side wall panels 3 are connected together.

[0036] In summary, the prefabricated side wall panels 3 are quickly connected by embedded steel plates 2, avoiding the need for rebar lap connections in the reserved post-cast sections between the prefabricated side wall panels 3. Welding of the embedded steel plates 2 can replace the rebar lap connections in the post-cast sections, reducing the amount of lateral formwork used in the molds for producing concrete modules. This allows for more flexible disassembly of modular integrated buildings into individual wall panel components, significantly reducing the production difficulty in complex structural locations.

[0037] Furthermore, the multiple prefabricated side wall panels 3 include a first prefabricated side wall panel 31, a second prefabricated side wall panel 32, a third prefabricated side wall panel 33, and a fourth prefabricated side wall panel 34, wherein: the first prefabricated side wall panel 31 and the third prefabricated side wall panel 33 are both bent and located on two perpendicular facades; one end of the first prefabricated side wall panel 31 is connected to one end of the second prefabricated side wall panel 32, and the other end of the fourth prefabricated side wall panel 34 is connected to one end of the first prefabricated side wall panel 31; the other end of the second prefabricated side wall panel 32 is connected to one end of the third prefabricated side wall panel 33; and the other end of the third prefabricated side wall panel 33 is connected to one end of the fourth prefabricated side wall panel 34, all by welding to the pre-embedded steel plates 2 in their respective end faces. The precast side wall panels 3 are the side wall panels of the concrete module. The first precast side wall panel 31 and the third precast side wall panel 33 are bent, with two vertical surfaces at the two ends of the bend. The second precast side wall panel 32 is located on one side of the quadrilateral side of the concrete module, and the fourth precast side wall panel 34 is part of one side of the quadrilateral side of the concrete module. The precast side wall panels 3 with different shapes facilitate the disassembly of the concrete module. Precast side wall panels 3 with inconsistent shapes and sizes can be connected to form a single unit. Even if precast side wall panels 3 with different shapes and sizes than those in this embodiment are subsequently proposed, this connection structure can still be used to connect them into a single unit.

[0038] Furthermore, the embedded steel plate 2 is a first embedded steel plate 21, which is flat and its surface is coplanar with the surface of the precast side wall panel 3. Two adjacent precast side wall panels 3 are connected by a first embedded steel plate assembly 4 formed by welding the two first embedded steel plates 21 together. Since the first embedded steel plate 21 is flat and its surface is coplanar with the surface of the precast side wall panel 3, there are no gaps at the connection point when two adjacent precast side wall panels 3 are connected. The connection between the two adjacent precast side wall panels 3 is achieved by welding the edges of the first embedded steel plate assembly 4. Because there are no gaps between the two adjacent precast side wall panels 3, post-pouring strips and reinforcing bars are not required for connection. Furthermore, depending on the wall thickness of the two adjacent prefabricated side wall panels 3 and the shape of the connection, the welding positions of the two first embedded steel plates 21 are located at the outer edge of the end face of one of the prefabricated side wall panels 3 with a smaller wall thickness, or the welding positions of the two first embedded steel plates 21 are located at the outer edge of the end face of the two prefabricated side wall panels 3.

[0039] Furthermore, one end of the first prefabricated side wall panel 31 is connected to one end of the second prefabricated side wall panel 32, and the other end of the fourth prefabricated side wall panel 34 is connected to one end of the first prefabricated side wall panel 31 through the first embedded steel plate assembly 4. The two first embedded steel plates 21 in the first embedded steel plate assembly 4 are welded together by exposing welding positions on the end faces of their respective prefabricated side wall panels 3. The first precast side wall panel 31 is the outer wall panel in the concrete module. The outer wall panel is the wall panel that is in direct contact with the outside. Therefore, the first precast side wall panel 31 is relatively thick. The fixing steel bar 1 can extend along the thickness direction of the first precast side wall panel 31. One end of the first precast side wall panel 31 and the other end of the fourth precast side wall panel 34 are located on one side of the concrete module. Therefore, the first precast side wall panel 31 and the fourth precast side wall panel 34 can be welded together by the flat first embedded steel plate 21. Moreover, the exposed side of the first embedded steel plate 21 has a welding position that can be welded, providing space for welding.

[0040] Furthermore, the distance between multiple embedded steel plates 2 on one end face of a prefabricated side wall panel 3 is within the range of 350mm-500mm. For better connection effect and economic practicality, the distance between multiple embedded steel plates 2 on one end face of the prefabricated side wall panel 3 is within the range of 350mm-500mm.

[0041] Furthermore, a steel mesh 6 is pre-embedded in the precast side wall panel 3, and the fixing steel bar 1 is fixedly connected to the steel mesh 6. The fixing steel bar 1 is fixed to the steel mesh 6 in the precast side wall panel 3. After the concrete is poured, the fixing steel bar 1, the pre-embedded steel plate 2 and the precast side wall panel 3 form a whole, and the pre-embedded steel plate 2 will not fall off.

[0042] Furthermore, the embedded steel plate 2 and the fixed reinforcing bar 1 are fixedly connected by welding angle iron at their joint. For better fixing effect, the angle iron is connected to the embedded steel plate 2 and the fixed reinforcing bar 1 respectively through an L-shaped structure, so that the fixed reinforcing bar 1 is perpendicular to the embedded steel plate 2 and the connection area is also increased.

[0043] Furthermore, the thickness of the embedded steel plate 2 is within the range of 8mm-12mm, and the height of the embedded steel plate 2 is within the range of 80mm-120mm, with corresponding embedded steel plates 2 having the same height. In order to achieve a better fixing effect for the connected embedded steel plates 2, the two connected embedded steel plates 2 have the same height, thus maximizing the weldable length of the two embedded steel plates 2.

[0044] Example 2

[0045] Reference Figure 4 and Figure 5The difference between this embodiment and embodiment 1 is that the shape of the embedded steel plate 2 is different. In order to connect the corners of the two connected prefabricated side wall panels 3 where it is inconvenient to connect the embedded steel plate 2 to the fixed steel bar 1, it is necessary to have a different shape than the first embedded steel plate 21, as detailed below.

[0046] In this embodiment, the embedded steel plate 2 is a second embedded steel plate 22. The second embedded steel plate 22 is L-shaped, and its two surfaces are coplanar with the two vertical wall surfaces of the precast side wall panel 3 to which it is located. The two adjacent precast side wall panels 3 are connected by a second embedded steel plate assembly 5 formed by welding a first embedded steel plate 21 and a second embedded steel plate 22 together. In order to achieve the same fixing effect between different precast side wall panels 3, by using the L-shaped second embedded steel plate 22, precast side wall panels 3 that cannot be connected by two first embedded steel plates 21 can achieve the same connection effect. The L-shaped second embedded steel plate 22 has two vertical wall surfaces coplanar in the precast side wall panel 3 to which it is located. Therefore, the L-shaped second embedded steel plate 22 is convenient to connect with the first embedded steel plate 21 and also convenient to form an integral whole with the precast side wall panel 3 to which it is located, thus strengthening the connection between the second embedded steel plate 22 and the precast side wall panel 3 to which it is located.

[0047] Furthermore, the other end of the second prefabricated side wall panel 32 is connected to one end of the third prefabricated side wall panel 33, and the other end of the third prefabricated side wall panel 33 is connected to one end of the fourth prefabricated side wall panel 34, respectively, through the second embedded steel plate assembly 5. The L-shaped second embedded steel plate 22 is composed of a first straight plate and a second straight plate that are perpendicularly connected. The inner surface of the first straight plate is fixedly connected to the fixing reinforcing bar 1, and the second straight plate is welded to the first embedded steel plate 21. The fixing reinforcing bar 1 is parallel to the connection surface of the second straight plate and the first embedded steel plate 21.

[0048] Specifically, the third precast side wall panel 33 is relatively thin, therefore, the fixing reinforcing bar 1 cannot be directly connected to the embedded steel plate 2. The L-shaped second embedded steel plate 22 consists of a first straight plate and a second straight plate that are perpendicularly connected. The inner surface of the first straight plate is connected to the fixing reinforcing bar 1, and the second straight plate is fixedly connected to the corresponding first embedded steel plate 21, achieving a better connection effect between the embedded steel plate 2 and the third precast side wall panel 33. The fourth precast side wall panel 34 has a vertical corner, forming an L-shape, and one end of the L-shape is perpendicular to the third precast side wall panel 33. Therefore, the first embedded steel plate 21 cannot be used at one end of the fourth precast side wall panel 34. The fixing reinforcing bar 1 extends along the portion of the fourth precast side wall panel 34 that is perpendicular to the third precast side wall panel 33 and can be fixedly connected to the first straight plate in the L-shaped second embedded steel plate 22. The second straight plate in the second embedded steel plate 22 can be connected to the other end of the third precast side wall panel 33 through the second embedded steel plate 22.

[0049] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0051] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A connection structure for a modular integrated building, wherein the concrete modules of the modular integrated building include a precast base slab, a precast top slab, and multiple precast side wall panels arranged in a hexahedral layout (3), characterized in that: The connection structure includes multiple sets of connection components; The connecting assembly includes a fixed reinforcing bar (1) embedded in the precast side wall panel (3) and a precast steel plate (2) embedded in the end face of the precast side wall panel (3), with one end of the fixed reinforcing bar (1) fixedly connected to the precast steel plate (2). The two prefabricated side wall panels (3) that are connected to each other are welded together by the embedded steel plates (2) on their respective end faces.

2. The connection structure of the modular integrated building as described in claim 1, characterized in that: The plurality of precast side wall panels (3) include a first precast side wall panel (31), a second precast side wall panel (32), a third precast side wall panel (33), and a fourth precast side wall panel (34), wherein: The first prefabricated side wall panel (31) and the third prefabricated side wall panel (33) are both bent on two perpendicular facades. One end of the first prefabricated side wall panel (31) is connected to one end of the second prefabricated side wall panel (32), and the other end of the fourth prefabricated side wall panel (34) is connected to one end of the first prefabricated side wall panel (31). The other end of the second prefabricated side wall panel (32) is connected to one end of the third prefabricated side wall panel (33). The other end of the third prefabricated side wall panel (33) is connected to one end of the fourth prefabricated side wall panel (34) by welding through the embedded steel plate (2) in their respective end faces.

3. The connection structure of the modular integrated building as described in claim 2, characterized in that: The embedded steel plate (2) is one of the first embedded steel plate (21) and the second embedded steel plate (22). The first embedded steel plate (21) is flat and its surface is coplanar with the wall surface of the precast side wall panel (3) where it is located. The second embedded steel plate (22) is L-shaped and its two surfaces are coplanar with the two vertical wall surfaces of the precast side wall panel (3) where it is located. The two adjacent prefabricated sidewall panels (3) are connected by a first embedded steel plate assembly (4) formed by welding two first embedded steel plates (21); or The two prefabricated sidewall panels (3) that are adjacent to each other are connected by a second embedded steel plate assembly (5) formed by welding between a first embedded steel plate (21) and a second embedded steel plate (22).

4. The connection structure of the modular integrated building as described in claim 3, characterized in that: One end of the first prefabricated side wall panel (31) is connected to one end of the second prefabricated side wall panel (32), and the other end of the fourth prefabricated side wall panel (34) is connected to one end of the first prefabricated side wall panel (31) through the first embedded steel plate assembly (4). The two first embedded steel plates (21) in the first embedded steel plate assembly (4) are welded together by exposing welding positions on the end faces of the prefabricated side wall panel (3) where they are located.

5. The connection structure of the modular integrated building as described in claim 3, characterized in that: The other end of the second prefabricated side wall panel (32) is connected to one end of the third prefabricated side wall panel (33), and the other end of the third prefabricated side wall panel (33) is connected to one end of the fourth prefabricated side wall panel (34) through the second embedded steel plate assembly (5). The L-shaped second embedded steel plate (22) is composed of a first straight plate and a second straight plate that are perpendicularly connected. The inner surface of the first straight plate is fixedly connected to the fixed reinforcing bar (1), and the second straight plate is welded to the first embedded steel plate (21). The fixed reinforcing bar (1) is parallel to the connection surface of the second straight plate and the first embedded steel plate (21).

6. The connection structure of the modular integrated building as described in claim 1, characterized in that: The distance between the multiple embedded steel plates (2) on the end face of one of the prefabricated side wall panels (3) is in the range of 350mm-500mm.

7. The connection structure of the modular integrated building as described in claim 1, characterized in that: The precast side wall panel (3) is pre-embedded with a steel mesh (6), and the fixed steel bar (1) is fixedly connected to the steel mesh (6).

8. The connection structure of the modular integrated building as described in claim 1, characterized in that: The embedded steel plate (2) and the fixed steel bar (1) are fixedly connected by welding angle iron at their connection point.

9. The connection structure of the modular integrated building as described in claim 1, characterized in that: The thickness of the embedded steel plate (2) is in the range of 8mm-12mm, the height of the embedded steel plate (2) is in the range of 80mm-120mm, and the height of the two corresponding embedded steel plates (2) is the same.

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