Prefabricated wall and prefabricated wall connecting joint
By setting up a flared pouring hole in the wall of the prefabricated wall, the problem of insufficient concrete pouring at the joints between the bottom and floor slabs of the prefabricated wall is solved, and the construction quality is improved.
Patent Information
- Application Number
- CN202420455449.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-08
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-03-08
AI Technical Summary
In the prior art, the concrete at the joints between the bottom of the prefabricated wall and the floor slabs is not full, which affects the construction quality.
A prefabricated wall is designed, with several pouring holes in the wall along the length direction, each pouring hole extending in the height direction and forming a flaring at the bottom so that concrete flows from the bottom of the wall to adjacent pouring holes.
Through the flaring design, the concrete pouring at the bottom joints of the prefabricated wall is ensured to be fully poured, and the construction quality is improved.
Smart Images
Figure CN222513280U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of assembled buildings, in particular to a prefabricated wall and a prefabricated wall connection node. Background Art
[0002] With the country's vigorous development of prefabricated buildings and the promotion of intelligent construction policies, my country's prefabricated building technology is changing with each passing day. In the field of prefabricated shear walls, various forms of components have also appeared. As a type of prefabricated wall, the perforated shear wall is widely used in residential buildings, and is also used in basement exterior walls, pipe corridors and subway projects. However, in the prior art, when the prefabricated wall is located on the floor slab, when pouring the perforations in the prefabricated wall, at the bottom of the prefabricated wall, the concrete between the two adjacent perforations is not easy to flow close to each other, resulting in incomplete concrete pouring at the joint between the bottom of the prefabricated wall and the floor slab, affecting the construction quality. Utility Model Content
[0003] In view of this, the utility model provides a prefabricated wall and a prefabricated wall connection node to solve the problem that the concrete pouring at the joint between the wall bottom and the floor slab of the existing prefabricated wall is not full, thus affecting the construction quality.
[0004] In a first aspect, the utility model provides a prefabricated wall, comprising: a wall body, wherein a plurality of casting holes are arranged in the wall body at intervals along the length direction of the wall body, each of the casting holes is extended along the height direction of the wall body to penetrate the top and bottom of the wall body, and the bottom of the casting hole expands outward toward both sides along the length direction of the wall body to form a flared opening.
[0005] Beneficial effect: When pouring the prefabricated wall, concrete is poured from the top of the pouring hole, and the concrete flows to the bottom along the pouring hole. By setting the bottom of the pouring hole as an expansion, it is convenient for the concrete to flow from the bottom of the prefabricated wall toward the adjacent pouring hole, ensuring that the concrete pouring at the bottom joint of the prefabricated wall is full, thereby improving the construction quality of the prefabricated wall.
[0006] In an optional embodiment, along the height direction of the wall, the casting hole includes a first hole segment and a second hole segment, and the first hole segment and the second hole segment are connected; along the length direction of the wall, the hole diameter of the second hole segment is larger than the hole diameter of the first hole segment, so that the second hole segment forms a flared opening.
[0007] In an optional embodiment, a corrugated pipe is provided in the wall, and the lumen of the corrugated pipe forms the first hole section.
[0008] Beneficial effect: The corrugated pipe has the advantage of being free from demolding, and the corrugated surface of the corrugated pipe can make the post-cast concrete and the precast concrete bear the force synergistically, thereby improving the structural characteristics of the precast wall.
[0009] In an optional embodiment, among the plurality of casting holes, the bottoms of at least two of the casting holes are connected along the length direction of the wall.
[0010] Beneficial effect: The bottom of the casting hole is connected along the length direction, further ensuring the continuity of the concrete at the bottom joint of the prefabricated wall.
[0011] In an optional embodiment, the prefabricated wall further includes vertical steel bars, which are disposed inside the wall and extend along a height direction of the wall.
[0012] In an optional embodiment, the vertical reinforcement includes structural reinforcement, and the structural reinforcement is completely located inside the wall.
[0013] Beneficial effect: By setting structural reinforcement, the strength requirements of prefabricated walls can be met.
[0014] In an optional embodiment, the vertical steel bars include structural steel bars and stress-bearing steel bars, wherein the structural steel bars are completely located inside the wall, and the stress-bearing steel bars extend upward from the top of the wall and are suitable for being inserted into the casting holes of the prefabricated wall located above.
[0015] Beneficial effect: prefabricating the stress-bearing steel bars into the wall eliminates the need for later installation of the stress-bearing steel bars and simplifies the construction process.
[0016] In an optional embodiment, the stress-bearing steel bars are arranged on one side of the casting hole along the thickness direction of the wall; and / or, the stress-bearing steel bars are arranged on both sides of the casting hole along the thickness direction of the wall; and / or, along the length direction of the wall, one or several stress-bearing steel bars are arranged at intervals on one side or both sides of the thickness direction of the wall.
[0017] In a second aspect, the utility model further provides a prefabricated wall connection node, comprising the above-mentioned prefabricated wall and floor slab, wherein two prefabricated walls are provided, and the two prefabricated walls are vertically arranged on the upper and lower sides of the floor slab.
[0018] In an optional embodiment, the vertical reinforcement of the precast wall includes structural reinforcement, which is completely located inside the wall body, and the precast wall connection node also includes stress-bearing reinforcement, the lower end of the stress-bearing reinforcement is inserted into the casting hole of the precast wall located below, and the upper end of the stress-bearing reinforcement is inserted into the casting hole of the precast wall located above; or, the vertical reinforcement of the precast wall includes structural reinforcement and stress-bearing reinforcement, the structural reinforcement is completely located inside the wall body, the stress-bearing reinforcement of the precast wall located below extends upward from the top of the wall body, is inserted into the casting hole of the precast wall located above, and is arranged corresponding to the stress-bearing reinforcement in the precast wall located above. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a front perspective schematic diagram of a partial structure of a prefabricated wall with a first type of casting hole according to an embodiment of the utility model (vertical steel bars, horizontal steel bars and tension bars are not shown);
[0021] Figure 2 for Figure 1 Sectional view of AA in the middle;
[0022] Figure 3 for Figure 1 Cross-sectional view of the middle BB;
[0023] Figure 4 It is a front perspective schematic diagram of a partial structure of a prefabricated wall with a second type of casting hole according to an embodiment of the utility model (vertical steel bars, horizontal steel bars and tension bars are not shown);
[0024] Figure 5 This is a perspective schematic diagram of a first prefabricated wall according to an embodiment of the utility model;
[0025] Figure 6 for Figure 5 Cross-sectional view of CC;
[0026] Figure 7 for Figure 5 Cross-sectional view of the middle DD;
[0027] Figure 8 for Figure 5 The structural schematic diagram of the first type of prefabricated wall connection node formed by the prefabricated wall and the floor slab shown;
[0028] Fig. 9 This is a schematic perspective view of a second prefabricated wall according to an embodiment of the utility model;
[0029] Fig.10 for Fig. 9 Sectional view of EE in the figure;
[0030] Fig.11 for Fig. 9 Cross-sectional view of the middle FF;
[0031] Fig.12 for Fig. 9 A schematic structural diagram of a second type of prefabricated wall connection node formed by a prefabricated wall and a floor slab shown;
[0032] Fig.13 This is a perspective schematic diagram of a third prefabricated wall according to an embodiment of the utility model;
[0033] Fig.14 for Fig.13 Cross-sectional view of middle GG;
[0034] Fig.15 for Fig.13 Cross-sectional view of middle HH;
[0035] Fig.16 for Fig.13 A schematic structural diagram of a third type of prefabricated wall connection node formed by a prefabricated wall and a floor slab shown;
[0036] Fig.17 This is a schematic perspective view of a fourth prefabricated wall according to an embodiment of the utility model;
[0037] Fig.18 for Fig.17 Sectional view of middle II;
[0038] Fig.19 for Fig.17 Cross-sectional view of JJ;
[0039] Fig. 20 for Fig.17 A schematic structural diagram of a fourth type of prefabricated wall connection node formed by a prefabricated wall and a floor slab as shown;
[0040] Fig.21 This is a schematic front perspective view of a partial structure of a prefabricated wall in which the bottoms of several casting holes are connected in an embodiment of the utility model (vertical steel bars, horizontal steel bars and tension bars are not shown).
[0041] Description of reference numerals:
[0042] 1. Wall; 11. Casting hole; 111. First hole section; 112. Second hole section; 2. Vertical reinforcement; 21. Structural reinforcement; 22. Load-bearing reinforcement; 3. Horizontal reinforcement; 4. Tie reinforcement; 10. Precast wall; 20. Floor slab. DETAILED DESCRIPTION
[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0044] Combine the following Figures 1 to 21 , describing an embodiment of the utility model.
[0045] According to an embodiment of the utility model, on the one hand, a prefabricated wall 10 is provided, comprising: a wall body 1. A plurality of casting holes 11 are arranged in the wall body 1 at intervals along the length direction of the wall body 1, each casting hole 11 is extended along the height direction of the wall body 1 to penetrate the top and bottom of the wall body 1, and the bottom of the casting hole 11 expands outward toward both sides along the length direction of the wall body 1 to form an expansion.
[0046] When the precast wall 10 is cast, concrete is cast from the top of the casting hole 11, and the concrete flows toward the bottom along the casting hole 11. By setting the bottom of the casting hole 11 as an expansion, it is convenient for concrete to flow from the bottom of the precast wall 10 toward the adjacent casting hole 11, thereby ensuring that the concrete at the bottom joint of the precast wall 10 is fully cast, thereby improving the construction quality of the precast wall 10.
[0047] It is worth mentioning that please refer to Figures 1 to 4 For the casting hole 11, along the length direction of the wall 1, the hole diameter of the casting hole 11 near the bottom position is larger than the hole diameter of the casting hole 11 near the top position, so that a flare is formed at the bottom position of the casting hole 11, so that the concrete poured in the casting hole 11 is convenient to flow out at the bottom position of the casting hole 11 and flow toward the adjacent casting hole 11, and, by forming a flare at the bottom of the casting hole 11, the distance between the adjacent casting holes 11 at the bottom is reduced, which facilitates the intersection of the concrete between the adjacent casting holes 11, thereby filling the bottom joint of the prefabricated wall 10.
[0048] In one embodiment, Figure 1 and Figure 4As shown, along the height direction of the wall 1, the casting hole 11 includes a first hole section 111 and a second hole section 112, and the first hole section 111 and the second hole section 112 are connected. Along the length direction of the wall 1, the hole diameter of the second hole section 112 is larger than the hole diameter of the first hole section 111, so that the second hole section 112 forms an expansion.
[0049] It is worth noting that if Figures 1 to 4 As shown, the first hole segment 111 and the second hole segment 112 are coaxially arranged, and along the length direction of the wall 1, the two sides of the second hole segment 112 are extended outward relative to the two sides of the first hole segment 111, so that the second hole segment 112 forms a flared opening relative to the first hole segment 111.
[0050] In one embodiment, Figure 1 As shown, the projection of the second hole section 112 on the surface along the length direction and the height direction of the wall 1 is trumpet-shaped, so that the second hole section 112 is a gradually expanding structure from top to bottom.
[0051] Of course, in other alternative embodiments, the second hole segment 112 may also be of other shapes, for example, Figure 4 As shown, the projection of the second hole segment 112 on the surface along the length direction and the height direction of the wall 1 is approximately square, and it is only necessary to make the aperture of the second hole segment 112 along the length direction of the wall 1 larger than the aperture of the first hole segment 111.
[0052] It is worth mentioning that please refer to Figures 1 to 3 , the diameters of the casting holes 11 are set equally along the thickness direction of the wall 1. Specifically, the diameter of the first hole section 111 along the thickness direction of the wall 1 is the same as the diameter of the second hole section 112 along the thickness direction of the wall 1. That is, the bottom of the casting hole 11 does not need to be expanded along the thickness direction of the wall 1.
[0053] In one embodiment, Figure 1 and Figure 4 As shown, a corrugated pipe is provided in the wall 1, and the cavity of the corrugated pipe forms a first hole section 111. The corrugated pipe has the advantage of being free from demolding, and the corrugated surface of the corrugated pipe can make the post-cast concrete and the precast concrete cooperate in force, thereby improving the structural characteristics of the precast wall 10.
[0054] In one embodiment, Fig.21 As shown, among the plurality of casting holes 11, the bottoms of at least two casting holes 11 are connected along the length direction of the wall 1. That is, the bottoms of two, three, ..., multiple or even all casting holes 11 can be connected along the length direction of the wall 1. The bottoms of the casting holes 11 are connected along the length direction to further ensure the continuity of the concrete at the bottom joint of the prefabricated wall 10.
[0055] In one embodiment, Figures 5 to 20 As shown, the prefabricated wall 10 further includes vertical steel bars 2 , which are arranged in the wall body 1 and extend along the height direction of the wall body 1 .
[0056] It is worth noting that if Figures 5 to 20 As shown, the prefabricated wall 10 further includes horizontal steel bars 3, which are arranged in the wall body 1 and extend along the length direction of the wall body 1. Further, a plurality of horizontal steel bars 3 are arranged at intervals along the height direction of the wall body 1, and a plurality of vertical steel bars 2 are arranged at intervals along the length direction of the wall body 1, and a plurality of horizontal steel bars 3 and a plurality of vertical steel bars 2 are arranged crosswise to form a mesh structure.
[0057] Furthermore, at least two mesh structures are provided in the wall 1, and the at least two mesh structures are spaced apart along the thickness direction of the wall 1. Specifically, the at least two mesh structures are provided along the thickness direction of the wall 1 on opposite sides of the pouring hole 11. The at least two mesh structures are connected by the tie rod 4. In this embodiment, please refer to Figure 6 and Figure 7 Two mesh structures are arranged in the wall 1, and the two mesh structures are connected by tie bars 4.
[0058] In one embodiment, Figure 6 and Figure 7 As shown, the vertical reinforcement 2 includes structural reinforcement 21, and the structural reinforcement 21 is completely located inside the wall 1. By providing the structural reinforcement 21, the strength requirement of the prefabricated wall 10 is met.
[0059] In one embodiment, Fig.10 and Fig.11 , Fig.14 and Fig.15 , Fig.18 and Fig.19 As shown, the vertical reinforcement 2 includes structural reinforcement 21 and stress reinforcement 22. The structural reinforcement 21 is completely located inside the wall 1, and the stress reinforcement 22 extends upward from the top of the wall 1 and is suitable for being inserted into the casting hole 11 of the prefabricated wall 10 located above. Prefabricating the stress reinforcement into the wall eliminates the process of installing the stress reinforcement later and simplifies the construction process.
[0060] In one embodiment, Fig.10 and Fig.11 As shown, the stress-bearing steel bars 22 are arranged along the thickness direction of the wall 1 corresponding to one side of the casting hole 11 .
[0061] It is worth mentioning that please refer to Fig.10 and Fig.11 A structural steel bar 21 is arranged on the other side of the casting hole 11 along the thickness direction of the wall 1 corresponding to the stress-bearing steel bar 22 .
[0062] For further explanation, please refer to Fig.10 and Fig.11 For two adjacent casting holes 11, the stress-bearing steel bars 22 are arranged on different sides, so that the stress of the prefabricated wall 10 is more uniform.
[0063] It is worth noting that, usually, the diameter of the stress-bearing steel bar 22 is not less than the diameter of the structural steel bar 21 .
[0064] Of course, in other alternative embodiments, such as Fig.14 and Fig.15 As shown, the stress-bearing steel bars 22 are arranged along the thickness direction of the wall 1 corresponding to the two sides of the casting hole 11.
[0065] In one embodiment, Fig.10 and Fig.11 As shown, a stress-bearing steel bar 22 is provided on one side of the casting hole 11 along the thickness direction of the wall 1 .
[0066] In other alternative embodiments, Fig.14 and Fig.15 As shown, one stress-bearing steel bar 22 is provided on each side of the casting hole 11 along the thickness direction of the wall 1 .
[0067] As other alternative implementations, Fig.18 and Fig.19 As shown, along the length direction of the wall 1, a plurality of stress-bearing steel bars 22 are arranged at intervals on both sides of the pouring hole 11 along the thickness direction of the wall 1, for example Fig.18 and Fig.19 Two shown.
[0068] Of course, in other alternative embodiments, along the length direction of the wall 1, a plurality of stress-bearing steel bars 22 may be arranged at intervals on one side of the thickness direction of the wall 1. Further, a structural steel bar 21 may be arranged corresponding to the stress-bearing steel bars 22 on the other side of the thickness direction of the wall 1.
[0069] According to an embodiment of the present invention, on the other hand, a prefabricated wall connection node is provided, including the above-mentioned prefabricated wall 10 and floor slab 20, wherein two prefabricated walls 10 are provided, and the two prefabricated walls 10 are vertically arranged on the upper and lower sides of the floor slab 20.
[0070] In one embodiment, Figure 8 As shown, the vertical reinforcement 2 of the precast wall 10 includes structural reinforcement 21, which is completely located inside the wall 1. The precast wall connection node also includes stress-bearing reinforcement 22, and the lower end of the stress-bearing reinforcement 22 is inserted into the casting hole 11 of the precast wall 10 located below, and the upper end of the stress-bearing reinforcement 22 is inserted into the casting hole of the precast wall 10 located above.
[0071] It is worth mentioning that please refer to Figure 8 The stress-bearing steel bar 22 is divided into two sections, and the two sections of steel bars are connected and arranged by a connecting piece. After the stress-bearing steel bar 22 is constructed, concrete is poured in the pouring hole 11 to form an integral stress-bearing member.
[0072] In another embodiment, if Fig.12 , Fig.16 and Fig. 20 As shown, the vertical reinforcement 2 of the precast wall 10 includes structural reinforcement 21 and stress reinforcement 22. The structural reinforcement 21 is completely located inside the wall 1. The stress reinforcement 22 of the precast wall 10 located below extends upward from the top of the wall 1 and is inserted into the casting hole 11 of the precast wall 10 located above and is arranged corresponding to the stress reinforcement 22 in the precast wall 10 located above.
[0073] Specifically, Figures 9 to 11 As shown, the stress-bearing steel bar 22 is arranged along the thickness direction of the wall 1 corresponding to one side of the pouring hole 11 and is provided with one, such as Fig.12 As shown, the stress-bearing steel bars 22 of the precast wall 10 at the bottom extend upward from the top of the wall body 1 and are inserted into the casting hole 11 of the precast wall 10 at the top after being bent. The portion of the stress-bearing steel bars 22 of the precast wall 10 at the bottom inserted into the casting hole 11 of the precast wall 10 at the top forms an indirect overlap with the stress-bearing steel bars 22 of the precast wall 10 at the top.
[0074] Specifically, Figures 13 to 15 As shown, the stress-bearing steel bars 22 are arranged on both sides of the pouring hole 11 along the thickness direction of the wall 1, and one is arranged on each side. Fig.16 As shown, for one casting hole 11, two stress-bearing steel bars 22 of the precast wall 10 at the bottom extend upward from the top of the wall body 1, are bent, and are inserted into the casting hole 11 of the precast wall 10 at the top. Furthermore, the upper ends of the two stress-bearing steel bars 22 are connected. The parts of the two stress-bearing steel bars 22 of the precast wall 10 at the bottom inserted into the casting hole 11 of the precast wall 10 at the top form an indirect overlap with the stress-bearing steel bars 22 of the precast wall 10 at the top.
[0075] Specifically, Figures 17 to 19 As shown, along the length direction of the wall 1, two stress-bearing steel bars 22 are arranged at intervals on both sides of the pouring hole 11 along the thickness direction of the wall 1, such as Fig. 20As shown, for one casting hole 11, the four stress-bearing steel bars 22 of the precast wall 10 at the bottom extend upward from the top of the wall 1, are bent, and are inserted into the casting hole 11 of the precast wall 10 at the top. Furthermore, the upper ends of the two stress-bearing steel bars 22 corresponding to each other along the thickness direction of the wall 1 are connected. The parts of the four stress-bearing steel bars 22 of the precast wall 10 at the bottom that are inserted into the casting hole 11 of the precast wall 10 at the top form an indirect overlap with the stress-bearing steel bars 22 of the precast wall 10 at the top. It is worth noting that, please refer to Fig. 20 , located in the second hole section 112 of the upper prefabricated wall 10, along the length direction of the wall 1 (i.e. Fig. 20 Two groups of stress-bearing steel bars 22 are arranged at intervals in the direction perpendicular to the drawing. It should be further explained that, since the casting hole 11 is expanded along the length direction of the wall 1 through the second hole section 112, it is convenient to insert two groups (of course, it can also be multiple groups) of stress-bearing steel bars 22.
[0076] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.
Claims
1. A prefabricated wall, characterized in that: include: A wall (1), wherein a plurality of casting holes (11) are arranged in the wall (1) at intervals along the length direction of the wall (1), each of the casting holes (11) is extended along the height direction of the wall (1) to penetrate the top and bottom of the wall (1), and the bottom of the casting hole (11) expands outwards toward both sides along the length direction of the wall (1) to form an expansion opening.
2. The prefabricated wall according to claim 1, characterized in that: Along the height direction of the wall (1), the casting hole (11) comprises a first hole section (111) and a second hole section (112), and the first hole section (111) and the second hole section (112) are connected to each other; along the length direction of the wall (1), the hole diameter of the second hole section (112) is larger than the hole diameter of the first hole section (111), so that the second hole section (112) forms an expanded opening.
3. The prefabricated wall according to claim 2, characterized in that: A corrugated pipe is arranged inside the wall (1), and the cavity of the corrugated pipe forms the first hole section (111).
4. The prefabricated wall according to any one of claims 1 to 3, characterized in that: Among the plurality of pouring holes (11), the bottoms of at least two of the pouring holes (11) are connected and arranged along the length direction of the wall (1).
5. The prefabricated wall according to any one of claims 1 to 3, characterized in that: The prefabricated wall (10) further comprises vertical steel bars (2), wherein the vertical steel bars (2) are arranged in the wall body (1) and extend along the height direction of the wall body (1).
6. The prefabricated wall according to claim 5, characterized in that: The vertical steel bars (2) include structural steel bars (21), and the structural steel bars (21) are completely located inside the wall (1).
7. The prefabricated wall according to claim 5, characterized in that: The vertical steel bars (2) include structural steel bars (21) and stress-bearing steel bars (22), wherein the structural steel bars (21) are completely located inside the wall (1), and the stress-bearing steel bars (22) extend upward from the top of the wall (1) and are suitable for being inserted into the casting hole (11) of the prefabricated wall (10) located above.
8. The prefabricated wall according to claim 7, characterized in that: The stress-bearing steel bar (22) is arranged on one side of the wall (1) corresponding to the pouring hole (11) in the thickness direction of the wall (1); and / or, The stress-bearing steel bars (22) are arranged along the thickness direction of the wall (1) corresponding to the two sides of the pouring hole (11); and / or, Along the length direction of the wall (1), one or a plurality of stress-bearing steel bars (22) are arranged at intervals on one side or both sides in the thickness direction of the wall (1).
9. A prefabricated wall connection node, characterized in that: It comprises the prefabricated wall (10) and the floor slab (20) according to any one of claims 1 to 8, wherein two prefabricated walls (10) are provided, and the two prefabricated walls (10) are vertically arranged on the upper and lower sides of the floor slab (20).
10. The prefabricated wall connection node according to claim 9, characterized in that: The vertical reinforcement (2) of the prefabricated wall (10) includes structural reinforcement (21), the structural reinforcement (21) is completely located inside the wall (1), the prefabricated wall connection node also includes stress reinforcement (22), the lower end of the stress reinforcement (22) is inserted into the casting hole (11) of the prefabricated wall (10) located below, and the upper end of the stress reinforcement (22) is inserted into the casting hole of the prefabricated wall (10) located above; or, The vertical steel bars (2) of the prefabricated wall (10) include structural steel bars (21) and stress-bearing steel bars (22), wherein the structural steel bars (21) are completely located inside the wall body (1), and the stress-bearing steel bars (22) of the prefabricated wall (10) located below extend upward from the top of the wall body (1), and are inserted into the casting hole (11) of the prefabricated wall (10) located above and are arranged correspondingly to the stress-bearing steel bars (22) in the prefabricated wall (10) located above.