Fabricated prefabricated reinforced concrete shear wall unit and manufacturing mold thereof

Abstract

The utility model provides an assembly type prefabricated reinforced concrete shear wall unit and a manufacturing mold thereof, and is applied to the technical field of prefabricated shear walls. In the assembly type prefabricated reinforced concrete shear wall unit, connecting steel bars extending outwards are distributed on the periphery of the shear wall unit; the upper ends and the lower ends of the shear wall units are suitable for limiting cast-in-place sections for the shear wall units to be vertically connected, the upper ends of the shear wall units are fixedly connected with vertical upper positioning steel pipes, and the lower ends of the shear wall units are fixedly connected with vertical lower positioning steel pipes. When the shear wall is assembled, the lower positioning steel pipes of the upper-layer shear wall unit are matched with the upper positioning steel pipes of the lower-layer shear wall unit in a sleeved mode so as to guide the connecting steel bars of the upper-layer shear wall unit and the lower-layer shear wall unit in the cast-in-place section to achieve aligned connection. The positioning steel pipe comprises an edge sealing steel plate, an anchoring steel pipe and an exposed steel pipe, wherein the anchoring steel pipe and the exposed steel pipe are welded to the two sides of the edge sealing steel plate respectively. The shear wall unit has the advantages of being easy to center and mold.

Description

Technical Field

[0001] This application relates to the field of precast shear wall technology, specifically to an assembled precast reinforced concrete shear wall unit and its manufacturing mold. Background Technology

[0002] In prefabricated buildings, the vertical connection of precast shear walls is a critical link. Common connection methods include grouting sleeve connection, grout-anchored lap connection, and post-cast concrete connection. The first two methods both present challenges in positioning the upper and lower layers of reinforcing bars during construction. For example, in grouting sleeve connection, the upper or lower reinforcing bars must be precisely inserted into the center of the sleeve. However, due to factors such as component manufacturing errors and on-site construction deviations, it is difficult to insert the reinforcing bars precisely into the center of the sleeve, potentially leading to eccentricity or bending. This results in uneven bond strength between the reinforcing bars and the sleeve after grouting, affecting the mechanical properties of the connection. Similarly, in grout-anchored lap connection, the reinforcing bars must be accurately inserted into the grout anchor duct and maintain the specified lap length and positional deviation requirements. During construction, the reinforcing bars may be skewed or not inserted completely, resulting in insufficient lap length or uneven stress, affecting the overall structural performance.

[0003] The use of post-cast concrete connection can overcome the problem of difficult reinforcement positioning to some extent. For example, in the prior art, Chinese patent CN108360712A, published on 2018-08-03, proposes a prefabricated reinforced concrete shear wall with protruding feet and its construction method. The vertical connection of the shear wall uses the aforementioned post-cast concrete connection method. During construction, the upper prefabricated shear wall is hoisted into place before the lower horizontal post-cast strip concrete is poured, and the longitudinal reinforcement of the upper prefabricated shear wall is inserted into the lower horizontal post-cast strip. The protruding feet are used as vertical supports when the upper prefabricated shear wall is hoisted into place to reduce the amount of temporary supports. Furthermore, the protruding feet can also act as shear keys, improving the shear bearing capacity of the connection joint. However, this solution has at least the following problems during the construction phase: First, the concrete protruding feet only serve as vertical supports and do not provide positioning. Additional positioning operations are still required when hoisting the shear wall on site, resulting in time-consuming hoisting operations and low construction efficiency. Furthermore, the exposed reinforcing bars on the protruding feet used for vertical support make demolding difficult during factory molding. Improper handling can easily damage the concrete, affecting product quality or even damaging the mold. Utility Model Content

[0004] In view of this, the embodiments of this specification provide an assembled precast reinforced concrete shear wall unit and its manufacturing mold, which has the advantages of easy centering and easy molding.

[0005] The embodiments in this specification provide the following technical solutions:

[0006] This specification provides an assembly-type precast reinforced concrete shear wall unit. The shear wall unit has outwardly extending connecting steel bars distributed around its perimeter. The upper and lower ends of the shear wall unit are adapted to define a cast-in-place section for vertical connection of the shear wall units. A vertical upper positioning steel pipe is fixed to the upper end of the shear wall unit, and a vertical lower positioning steel pipe is fixed to the lower end of the shear wall unit. During shear wall assembly, the lower positioning steel pipe of the upper shear wall unit and the upper positioning steel pipe of the lower shear wall unit are sleeved together to guide the connecting steel bars of the upper and lower shear wall units within the cast-in-place section to achieve alignment and connection.

[0007] To optimize this technical solution, the following technical measures were also adopted:

[0008] As a preferred embodiment, the positioning steel pipe includes a sealing steel plate and anchoring steel pipes and exposed steel pipes respectively welded to both sides of the sealing steel plate. The anchoring steel pipes are pre-embedded inside the shear wall unit, and the exposed steel pipes extend outward from the shear wall unit and are placed in the cast-in-place section.

[0009] As a preferred embodiment, the anchoring steel pipe is provided with anchoring reinforcing bars, which are lapped or welded to the internal reinforcing bars of the shear wall unit.

[0010] As a preferred embodiment, the outer diameter of the upper positioning steel pipe is smaller than the inner diameter of the lower positioning steel pipe.

[0011] As a preferred embodiment, grouting holes are formed on the exposed steel pipe within the cast-in-place section to allow concrete slurry to enter the interior of the exposed steel pipe during concrete pouring in the cast-in-place section.

[0012] As a preferred method, precast concrete walls should also have pre-reserved hoisting embeds, demolding embeds, and embeds or holes for supporting cast-in-place edge components.

[0013] As a preferred embodiment, the connecting steel bars extending from the lower end of the shear wall unit are either closed or open, and the connecting steel bars extending from the upper end of the shear wall unit are either closed or open.

[0014] As a preferred embodiment, the connecting steel bars extending from both sides of the shear wall unit are either closed or open.

[0015] This specification also provides a manufacturing mold for the above-mentioned prefabricated reinforced concrete shear wall unit, wherein a first through-hole portion is formed on the side mold of the manufacturing mold for the exposed steel pipe of the positioning steel pipe to pass out of the mold.

[0016] As a preferred embodiment, the side mold is further provided with a second through-hole for the connecting steel bars of the shear wall unit to extend from inside the mold.

[0017] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0018] Firstly, according to the prefabricated reinforced concrete shear wall provided in the embodiments of this specification, in the cast-in-place section, the relative positions of the lower positioning steel pipe of the upper shear wall unit and the lower connecting steel bar of the upper shear wall unit are fixed. Similarly, the relative positions of the upper positioning steel pipe of the lower shear wall unit and the upper connecting steel bar of the lower shear wall unit are also fixed. Furthermore, in the cast-in-place section, the lower positioning steel pipe of the upper shear wall unit and the upper positioning steel pipe of the lower shear wall unit are arranged opposite each other in the vertical connection direction. The connecting steel bar at the lower end of the upper shear wall unit and the lower shear wall unit are also fixed. The connecting steel bars at the top of the shear wall unit are arranged in a one-to-one correspondence in the vertical connection direction. As long as the lower positioning steel pipe of the upper shear wall unit and the upper positioning steel pipe of the lower shear wall unit are connected, it means that the connecting steel bars of the upper and lower shear wall units in the cast-in-place section have been lapped and aligned, that is, the upper and lower shear wall bodies have been aligned. During subsequent assembly, there is no need to adjust the horizontal position. Only the verticality and elevation of the wall need to be finely adjusted. This eliminates the positioning operation of the shear wall unit after hoisting and improves construction efficiency.

[0019] Furthermore, according to the assembly mold for precast reinforced concrete shear walls provided in the embodiments of this specification, there are no exposed reinforcing bars on the outer walls of the upper and lower positioning steel pipes. Therefore, the shear wall is easy to demold after pouring, which can improve the efficiency of shear wall unit production. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1;

[0022] Figure 2 This is an assembly diagram of the upper and lower shear wall units in Embodiment 1;

[0023] Figure 3 This is a schematic diagram of the planar structure of Embodiment 1 in this application, which shows the internal structure of the positioning steel pipe;

[0024] Figure 4 This is a schematic diagram of the connection structure between the upper and lower shear wall units in Embodiment 1;

[0025] Figure 5This is a schematic diagram of the positioning steel pipe in Embodiment 1 of this application;

[0026] Figure 6 This is a schematic diagram of the disassembled structure of the mold in Embodiment 2 of this application;

[0027] Figure 7 This is a schematic diagram of the planar structure of the mold used in Embodiment 2 of this application;

[0028] Figure 8 This is a schematic diagram of the positioning steel pipe in Embodiment 3 of this application.

[0029] Among them, 1. Shear wall unit; 1a. Upper shear wall unit; 1b. Lower shear wall unit; 11. Left outward reinforcing bar; 12. Right outward reinforcing bar; 13. Upper outward reinforcing bar; 14. Lower outward reinforcing bar; 15. Reinforcing bar alignment connection part; 21. Lower positioning steel pipe; 22. Upper positioning steel pipe; 23. Exposed steel pipe; 231. Grouting hole; 24. Edge sealing steel plate; 241. Positioning hole; 25. Anchoring steel pipe; 3. Cast-in-place section; 4. Mold making; 41. Upper long strip module; 42. Template unit; 43. First through-hole; 44. Second through-hole; 45. Lower long strip module. Detailed Implementation

[0030] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0031] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0033] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] This specification presents an assembly-type precast reinforced concrete shear wall, aiming to solve the problems in the prior art where precast reinforced concrete shear walls cannot be horizontally positioned during on-site hoisting, and the problem of exposed reinforcing bars on concrete legs causing difficulties in demolding. It not only enables horizontal positioning of the upper shear wall unit being hoisted, but also eliminates exposed reinforcing bars at the positioning nodes, making demolding of the shear wall easy after pouring, without causing damage to the concrete, affecting product quality, or causing damage to the mold.

[0035] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0036] Example 1

[0037] like Figures 1 to 4 As shown in the embodiment of this specification, a precast reinforced concrete shear wall unit 1 is first provided. The shear wall unit 1 has outwardly extending connecting steel bars distributed around its perimeter. The upper and lower ends of the shear wall unit 1 are adapted to define the cast-in-place section 3 for vertical connection of the shear wall unit 1. The upper end of the shear wall unit 1 is fixedly connected to a vertical upper positioning steel pipe 22, and the lower end of the shear wall unit 1 is fixedly connected to a vertical lower positioning steel pipe 21. During the assembly of the shear wall, the lower positioning steel pipe 21 of the upper shear wall unit 1 and the upper positioning steel pipe 22 of the lower shear wall unit 1 are sleeved together to guide the connecting steel bars of the upper and lower shear wall units 1 in the cast-in-place section 3 to achieve alignment and connection.

[0038] like Figure 2 and Figure 4As shown, in this embodiment, within the cast-in-place section 3, the relative positions of the lower positioning steel pipe 21 of the upper shear wall unit 1a and the lower outward-extending reinforcing bar 14 at the lower end of the upper shear wall unit 1a are fixed. Similarly, the relative positions of the upper positioning steel pipe 22 of the lower shear wall unit 1b and the upper outward-extending reinforcing bar 13 at the upper end of the lower shear wall unit 1b are also fixed. Furthermore, within the cast-in-place section 3, the lower positioning steel pipe 21 of the upper shear wall unit 1a and the upper positioning steel pipe 22 of the lower shear wall unit 1b are arranged opposite each other in the vertical connection direction. Similarly, the lower outward-extending reinforcing bar 14 at the lower end of the upper shear wall unit 1a and the upper outward-extending reinforcing bar 13 at the upper end of the lower shear wall unit 1b are arranged vertically opposite each other. The connections are arranged in a one-to-one correspondence. Therefore, once the lower positioning steel pipe 21 of the upper shear wall unit 1a and the upper positioning steel pipe 22 of the lower shear wall unit 1b are fitted together, it means that the connecting steel bars of the upper shear wall unit 1a and the lower shear wall unit 1b within the cast-in-place section 3 have completed their lap alignment, as shown in the figure. In other words, within the cast-in-place section 3, the upper outward-extending steel bar 13 and the lower outward-extending steel bar 14 have completed their one-to-one alignment. In other words, the upper and lower shear wall bodies are in place, and no further horizontal adjustments are needed during subsequent assembly. Only minor adjustments to the verticality and elevation of the wall are required, eliminating the need for positioning operations after hoisting the shear wall units and improving construction efficiency. More specifically, before on-site hoisting, temporary supports and / or elevation adjustment devices are pre-installed at the upper end of the lower shear wall unit 1b. Temporary supports can be steel plates and / or reinforced concrete support blocks, and elevation adjustment devices can be screw-nut type elevation adjustment devices. More specifically, the phrase "the upper outward reinforcing bar 13 and the lower outward reinforcing bar 14 have completed one-to-one alignment" means that after hoisting and positioning, the corresponding connecting reinforcing bars of the upper and lower shear wall units overlap at least partially in the vertical direction and can be lapped together. The strength of the lapped connection meets the design requirements, and the lapped connection method can be, for example, binding lapped or welding lapped.

[0039] like Figures 1 to 4As shown, the reinforcing bars extending from the left side of shear wall unit 1 are left outward reinforcing bars 11, the reinforcing bars extending from the right side of shear wall unit 1 are right outward reinforcing bars 12, the reinforcing bars extending from the upper end of shear wall unit 1 are upper outward reinforcing bars 13, and the reinforcing bars extending from the lower end of shear wall unit 1 are lower outward reinforcing bars 14. The left outward reinforcing bars 11 and right outward reinforcing bars 12 can be arranged in a closed, open, or straight manner, while the upper outward reinforcing bars 13 and lower outward reinforcing bars 14 can be arranged in an open or closed manner. Shear wall unit 1 includes a shear wall body, which is composed of precast concrete and an internal wall reinforcement mesh. The wall reinforcement includes horizontal wall reinforcement, vertical wall reinforcement, and tie bars. The horizontal and vertical wall reinforcement are arranged in a double-layer mesh. The tie bars use hooks to hook the nodes of the double-layer reinforcement mesh, thereby connecting the double-layer reinforcement mesh into a whole. The left and right extended reinforcing bars 11 and 12 are extensions of the horizontal reinforcing bars of the wall, while the upper and lower extended reinforcing bars 13 and 14 are extensions of the vertical reinforcing bars of the wall. In this embodiment, the left and right extended reinforcing bars 11 and 12 are both closed. In some embodiments, to improve the load-bearing performance of the wall, the lower extended reinforcing bar 14 is closed, the upper extended reinforcing bar 13 is open, and the left and right extended reinforcing bars are open. The open reinforcing bars allow for a certain degree of slight deformation of the wall in the horizontal direction, making the stress distribution more uniform and improving the crack resistance and overall load-bearing performance of the wall.

[0040] In this embodiment, the outer diameter of the upper positioning steel pipe 22 is smaller than the inner diameter of the lower positioning steel pipe 21. This way, when the upper shear wall is hoisted on site, there is a certain gap between the lower positioning steel pipe 21 with a larger inner diameter and the upper positioning steel pipe 22 that it matches, allowing for a certain construction deviation. This eliminates the need for repeated hoisting or forced correction with jacks, saving adjustment time.

[0041] In this embodiment, two opposing upper positioning steel pipes 22 are provided at the upper end of the shear wall unit, and correspondingly, two opposing lower positioning steel pipes 21 are provided at the lower end of the shear wall unit. In some embodiments, depending on the length of the cast-in-place section, one or three upper positioning steel pipes 22 may be provided at the upper end of the shear wall unit, and the number and position of the positioning steel pipes at the lower end of the shear wall unit may be changed accordingly, which is not limited here.

[0042] In this embodiment, as Figure 5As shown, the upper positioning steel pipe 22 and the lower positioning steel pipe 21 can adopt the same structure. For example, both include a sealing steel plate 24 and anchoring steel pipes 25 and exposed steel pipes 23 respectively welded to both sides of the sealing steel plate 24. The width of the sealing steel plate 24 is greater than the outer diameter of the anchoring steel pipes 25 and exposed steel pipes 23, so that one end of the anchoring steel pipes 25 and exposed steel pipes 23 can be blocked by the sealing steel plate 24. This can prevent concrete slurry from undesirably leaking from the inside of the positioning steel pipe to the outside of the mold during the pouring of the shear wall. The anchoring steel pipe 25 is pre-embedded inside the shear wall unit 1, and the exposed steel pipe 23 extends outward from the shear wall unit 1 and is placed in the cast-in-place section 3. Furthermore, the anchoring steel pipe 25 is provided with anchoring steel bars, which are tied, lapped or welded to the internal steel bars of the shear wall unit 1. When constructing shear walls, the anchor steel pipe 25 can be tied and lapped together with the steel mesh of the shear wall body. After the tying and lapping are completed, the mold is assembled, such as... Figure 6 As shown, there are various types of molds that can be provided, which will be detailed below. During mold assembly, the side mold is provided with a first through-hole 43 for the exposed steel pipe 23 to pass through the mold. The structure of the first through-hole 43 can be various, such as a hole, a gap, or a through groove. The sealing steel plate 24 abuts against the side mold and seals the first through-hole 43. In this way, it is not necessary to set a special sealing component for the first through-hole 43, which saves the operation steps of mold assembly and improves the production efficiency of precast shear wall. The sealing component can be a single piece or a combination of components used to seal the grout leakage on the mold, such as foam cotton plugs, sealing blocks, etc. The places where grout leakage may occur include the first through-hole 43, the second through-hole 44, and the gaps on the mold.

[0043] like Figure 5 As shown, grouting holes 231 are provided on the exposed steel pipes of the upper positioning steel pipe 22 and the lower positioning steel pipe 21 within the cast-in-place section 3. These holes allow concrete grout to flow into and fill the internal space of the upper positioning steel pipe 22 and the lower positioning steel pipe 21 during the pouring of concrete in the cast-in-place section 3. Preferably, the grouting holes 231 are formed at the joint of the upper positioning steel pipe 22 and the lower positioning steel pipe 21, and penetrate radially through both pipes. The internal space includes both the inner cavity of the lower positioning steel pipe 21 and the space enclosed by the upper positioning steel pipe 22 and the lower positioning steel pipe 21, or any gaps, thereby ensuring the compactness and integrity of the concrete at the connection point. As a preferred application, the grouting holes 231 can also be used to connect the positioning steel pipes to the casting mold during shear wall construction, for example, by marking the grouting hole positions on the outside of the mold for easy and rapid positioning later.

[0044] Example 2

[0045] like Figures 6 to 8As shown, this embodiment, based on Embodiment 1, further proposes a manufacturing mold 4 for fabricating the precast reinforced concrete shear wall unit 1 as described in Embodiment 1. The mold 4 has a first protrusion part 43 formed on its side mold for the exposed steel pipe 23 of the positioning steel pipe to protrude outwards from the mold. During mold assembly, the sealing steel plate 24 of the positioning steel pipe abuts against the side mold and seals the corresponding protrusion part. As understood above, the sealing steel plate can serve as a sealing component on the side mold during shear wall fabrication. Furthermore, the sealing steel plate 24 increases the anchorage area between the positioning steel pipe and the shear wall unit, thereby increasing the overall structural strength of the positioning steel pipe. As understood above, the first protrusion part 43 can be designed as a hole or a spaced-out part, such as... Figures 6 to 7 As shown, the first through-hole 43 is designed in the form of a hole, and the template is also provided with a second through-hole 44 for the shear wall unit 1 to extend out of the mold. The second through-hole 44 is designed in the form of a spacing.

[0046] In one specific implementation, the manufacturing mold 4 includes an upper elongated module 41, a lower elongated module 45, and a side assembly module. The side assembly module includes multiple assembleable side mold units 42. The lower elongated module 45 includes multiple strip steel plates fixed on the bottom mold platform. The multiple strip steel plates are arranged along the outer periphery of the precast shear wall to enclose the shape of the precast shear wall. Similarly, the multiple assembleable side mold units 42 are supported along the edge of the shear wall and are fixedly connected to the lower elongated module 45. A second through-hole 44 is formed between adjacent assembleable side mold units 42. The upper elongated module 41 includes multiple strip steel plates fixedly connected to the upper surface defined by the multiple assembleable side mold units 42. The multiple strip steel plates are arranged along the outer periphery of the precast shear wall to enclose the shape of the precast shear wall. Preferably, a reinforcing ring is provided around the first protruding part 43 at the protruding position of the exposed steel pipe to enhance the rigidity of the opening side mold. Preferably, the lower long strip module 45 is fixedly connected to the side assembly module by bolts. Similarly, the upper long strip module 41 can also be fixedly connected to the side assembly module by bolts or a combination of bolts and nuts.

[0047] Here, the mold 4, on the one hand, can adapt to the shape and size of different shear walls by increasing or decreasing the number of assembleable units and using assembleable units of different sizes, specifications, and shapes, thereby enhancing the adaptability and flexibility of the mold during use. On the other hand, it can also prevent local steel reinforcement from getting stuck in the holes in the mold after the shear wall has been cast, thus preventing mold deformation or damage to precast components. Furthermore, the assembleable units are reusable, which can increase the number of times the mold can be reused and reduce mold costs.

[0048] Example 3

[0049] like Figure 8 As shown, the basic content of this embodiment is the same as that of Embodiment 1 and Embodiment 2. The only difference is the structure of the positioning steel pipe and the resulting assembly method of the positioning steel pipe. Specifically, in this embodiment, the positioning steel pipe also includes a sealing steel plate 24 and anchoring steel pipes 25 and exposed steel pipes 23 located on both sides of the sealing steel plate 24. The anchoring steel pipes 25 are embedded in the interior of the shear wall unit 1, and the exposed steel pipes 23 extend outward from the shear wall unit 1 and are placed in the cast-in-place section 3.

[0050] The difference lies in the fact that, in this embodiment, before the shear wall is poured, the anchoring steel pipe 25 is welded to the sealing steel plate 24, but the exposed steel pipe 23 is not welded to the sealing steel plate 24. The modular side mold unit is a general side mold, that is, the side mold does not have a first through part 43. During the mold assembly stage, the anchoring steel pipe 25 is tied to the steel mesh of the shear wall unit, and one side of the sealing steel plate 24 abuts against the side mold. The side of the sealing steel plate 24 away from the anchoring steel pipe 25 has a positioning recess 241. The periphery of the positioning recess 241 fits tightly with the side mold to ensure that the grout will not leak into the positioning recess during pouring. Then the shear wall is poured. After the shear wall is poured and demolded, the exposed steel pipe 23 is inserted into the positioning recess 241 and then welded to the sealing steel plate 24. The advantage of this approach is that there is no need to create a first protrusion part 43 on the side mold unit to allow the exposed steel pipe 23 to pass through the mold. The molding process of the shear wall unit 1 can be completed using only a general-purpose side mold. Furthermore, there is no need to install sealing parts, which further enhances the versatility of the mold and improves the efficiency of mold assembly.

[0051] Preferably, the positioning recess 241 is a cylindrical groove that mates with the exposed steel pipe 23. The positioning recess 241 is arranged opposite to the anchoring steel pipe 25, so that the anchoring steel pipe 25 and the exposed steel pipe 23 are roughly coaxial in the radial direction, thereby increasing the balance and stability of the positioning steel pipe under stress.

[0052] In summary, in the above embodiments, since the relative positions of the protruding reinforcing bars of the upper and lower shear wall units and the corresponding positioning steel pipes are fixed, and the upper and lower protruding reinforcing bars correspond one-to-one (i.e., the upper and lower protruding reinforcing bars are paired), the paired upper and lower protruding reinforcing bars are lapped and fixed at the same lap position after hoisting and positioning. The upper and lower positioning steel pipes are sleeved together. Therefore, as long as the upper and lower positioning steel pipes are in place within the cast-in-place section 3, it means that the upper and lower protruding reinforcing bars are in place. Then, the verticality and elevation of the precast shear wall can be adjusted through temporary measures, without the need to adjust the horizontal position of the upper and lower shear wall units 1. This eliminates the need for positioning operations of the shear wall units 1 after hoisting, improving construction efficiency. In addition, after the upper and lower positioning steel pipes are sleeved, concrete grout can be injected into the steel pipes during concrete pouring to increase the connection strength. After casting, the sleeved connection can also serve as a shear key, strengthening the overall structural strength of the cast-in-place section 3.

[0053] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0054] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fabricated precast reinforced concrete shear wall unit, characterized by, The shear wall unit is provided with outwardly extending connecting steel bars around the unit, and the upper and lower ends of the shear wall unit are adapted to define cast-in-place sections for vertical connection of the shear wall units, wherein the upper end of the shear wall unit is fixedly connected with a vertical upper positioning steel pipe, and the lower end of the shear wall unit is fixedly connected with a vertical lower positioning steel pipe, and when the shear wall is assembled, the lower positioning steel pipe of an upper shear wall unit is sleeved with the upper positioning steel pipe of a lower shear wall unit to guide the connecting steel bars of the upper and lower shear wall units in the cast-in-place sections to be connected in position.

2. The prefabricated reinforced concrete shear wall unit according to claim 1, characterized in that, The positioning steel pipe comprises an edge steel plate, an anchoring steel pipe and an exposed steel pipe respectively welded on both sides of the edge steel plate, the anchoring steel pipe is embedded in the interior of the shear wall unit, and the exposed steel pipe extends outwardly from the shear wall unit and is placed in the cast-in-place section.

3. The prefabricated reinforced concrete shear wall unit according to claim 2, characterized in that, An anchoring steel bar is arranged on the anchoring steel pipe and is connected with the internal steel bars of the shear wall unit by binding and lapping or welding.

4. The prefabricated reinforced concrete shear wall unit according to claim 1, characterized in that, The outer diameter of the upper positioning steel pipe is smaller than the inner diameter of the lower positioning steel pipe.

5. The prefabricated reinforced concrete shear wall unit according to claim 2, characterized in that, A grouting hole is formed in the exposed steel pipe in the cast-in-place section for allowing concrete slurry to enter the interior of the exposed steel pipe when concrete is cast in the cast-in-place section. 6.The fabricated precast reinforced concrete shear wall unit of claim 1, wherein, The reinforced concrete shear wall is provided with hoisting embedded parts, demolding embedded parts, embedded parts or holes for formwork of cast-in-place edge components. 7.The fabricated precast reinforced concrete shear wall unit of claim 1, wherein, The connecting steel bars extending from the lower end of the shear wall unit are in a closed or open shape, and the connecting steel bars extending from the upper end of the shear wall unit are in a closed or open shape. 8.The fabricated precast reinforced concrete shear wall unit of claim 1, wherein, The connecting steel bars extending from both sides of the shear wall unit are in a closed or open shape.

9. A manufacturing mold of the fabricated precast reinforced concrete shear wall unit according to claim 1, characterized in that, The side form of the manufacturing mold is provided with a first passing-out part for the positioning steel pipe to pass out of the mold.

10. The molding tool of claim 9, wherein, The side form is further provided with a second passing-out part for the connecting steel bars of the shear wall unit to extend out of the mold.

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