CN108086589A - Prefabricated wall, prefabricated unit body, building system and construction method thereof - Google Patents

Abstract

The invention discloses a prefabricated wall body, a prefabricated unit body, a building system and a construction method thereof. The prefabricated wall body comprises: a positioning template; The reinforcing bar grid includes vertical reinforcing bars extending in the vertical direction and horizontal reinforcing bars extending in the horizontal direction; pipelines are arranged in the reinforcing bar grid. The prefabricated wall body according to the embodiment of the present invention can improve the construction progress, facilitate on-site construction, improve construction accuracy, and at the same time effectively ensure the integrity of the structure, ensure the mechanical performance of the structure, and reduce costs.

Description

Prefabricated wall, prefabricated unit body, building system and construction method thereof

technical field

The invention relates to the technical field of construction, and more specifically, to a prefabricated wall body, a unit body having the same, a building system, and a construction method of the building system.

Background technique

At present, the country is vigorously promoting prefabricated buildings, and a large number of prefabricated buildings have been completed. However, at present, prefabricated buildings are basically prefabricated based on component levels, with individual components such as beams, panels, and walls prefabricated in factories, and spliced and installed on site. Positioning, lap joints and joints are made of cast-in-place concrete. Since most of the components are produced in factories, the construction waste on the construction site is greatly reduced, so it is more environmentally friendly and the construction period is greatly shortened. Laminated slabs are generally used for floor slabs, which can be used as the bottom formwork of the floor slab, and the external hanging slabs are used as one side formwork of the shear wall. Therefore, a large amount of formwork is saved.

Although the existing prefabricated buildings have many advantages, their disadvantages are also significant. Due to the factory production of a single component, the size of the prefabricated component has been fixed, and the size of the set-off line is too large or too small, which will cause difficulties in on-site splicing, and in the process of factory prefabrication, the size of the component will also be too large or too large. Small deviations will bring difficulties to on-site assembly.

During the on-site assembly process, the position and elevation of the heavy concrete prefabricated parts must be adjusted repeatedly by the crane, and it is difficult to achieve accurate dimensions. The site may need to be re-formed or leveled, adding a lot of workload, and the main body of the component is prefabricated, only the nodes are cast-in-place, and the steel bars are all disconnected and then connected at the nodes. The overall seismic performance of the structure is lower than that of the cast-in-place structure , especially with the implementation of the "Zoning Map of Seismic Motion Parameters in China" (GB18306-2015) and the new version of the seismic design code, the requirements for building seismic resistance have been improved on the original basis, and the challenge to traditional assembly is even greater.

The traditional precast concrete structure is poured in the factory, and the concrete component itself is heavy, the cost of transportation and hoisting is high, and the coverage radius of the factory is relatively small. If you want to promote it on a large scale, you must build a large number of factories according to the demand, which is economical. Poor performance and many restrictions.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention proposes a prefabricated wall, which can improve the construction progress, facilitate on-site construction, improve construction accuracy, and at the same time effectively ensure the integrity of the structure, ensure the mechanical performance of the structure, and reduce costs .

The present invention also proposes a prefabricated unit body having the above prefabricated wall body.

The present invention also proposes a building system with the above-mentioned prefabricated wall body.

The invention also proposes a construction method of the building system.

The prefabricated wall according to the embodiment of the first aspect of the present invention includes: a positioning template; Horizontal steel bars extending toward the steel bars and in the horizontal direction; pipelines, the pipelines are arranged in the steel bar grid.

The prefabricated wall body according to the embodiment of the present invention can improve construction progress, facilitate on-site construction, improve construction accuracy, and at the same time effectively ensure the integrity of the structure, ensure the mechanical performance of the structure, and reduce costs.

In addition, the prefabricated wall according to the above embodiments of the present invention may also have the following additional technical features:

According to some embodiments of the present invention, the pipeline includes at least one of an electrical pipeline and a plumbing pipeline.

According to some embodiments of the present invention, the positioning template is a cement pressure board, a calcium silicate board or a gypsum board.

According to some embodiments of the present invention, the prefabricated wall further includes: a rotating connector connected to the steel grid and rotatable at the storage position and the connection position, and the rotation connector is at the storage position When it is built in the steel mesh frame and protrudes from the steel mesh frame when it is in the connected position.

According to some embodiments of the present invention, the positioning template is provided with assembly holes.

The prefabricated unit body according to the embodiment of the second aspect of the present invention includes: a plurality of walls, the plurality of walls are successively connected to form a ring and a cavity is formed around them, each of the walls includes a positioning formwork, at least one The outer surface of the positioning formwork is provided with a reinforced grid, and at least one of the walls is formed as a prefabricated wall according to the embodiment of the first aspect of the present invention, and the positioning formworks of a plurality of the walls are connected in sequence.

According to some embodiments of the present invention, the walls include four, and the cavities are formed as square cavities.

According to some embodiments of the present invention, the outer surface of each positioning formwork is provided with the steel grid, and there are two prefabricated walls arranged oppositely, and two adjacent steel grids are connected.

According to some embodiments of the present invention, the prefabricated unit body further includes: a supporting frame, the supporting frame is detachably arranged in the cavity and supported on a plurality of the walls.

According to some embodiments of the present invention, the support frame is formed as a star frame and includes a connecting node portion and a plurality of support portions extending outward, and the plurality of support portions are supported on the inner wall surface of the wall body The surface support part and the corner support part supported at the junction of two adjacent walls.

The building system according to the embodiment of the third aspect of the present invention includes the prefabricated wall body according to the embodiment of the present invention.

The construction method of the building system according to the embodiment of the present invention includes the following steps: S1: Split the construction plan, split the house into units and/or single walls, and process according to the results of the split to obtain the construction plan according to the embodiment of the present invention The prefabricated wall body and/or the prefabricated unit body according to the embodiment of the present invention; S2: Transport the prefabricated wall body and/or the prefabricated unit body to the construction site for hoisting and assembly, and perform floor slabs after pouring concrete and curing construction.

According to some embodiments of the present invention, in the step S1, the processing method includes the following steps: S11: process the positioning template according to the division result, support the support frame of the prefabricated unit body on the positioning template; S12: process the steel grid frame and Install the pipeline on the reinforced grid; S13: fix the reinforced grid on the positioning template.

According to some embodiments of the present invention, the construction method of the building system further includes the following steps: S3: performing indoor and outdoor decoration.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is a schematic structural view of a prefabricated wall according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of a prefabricated unit body according to an embodiment of the present invention;

Fig. 3 is a schematic structural view of a prefabricated unit body according to another embodiment of the present invention;

Fig. 4 is a schematic diagram of splicing of prefabricated walls or unit bodies according to an embodiment of the present invention;

Fig. 5 is a flowchart of a construction method of a building system according to an embodiment of the present invention.

Reference signs:

Prefabricated wall body 100; prefabricated unit body 200; tie bolt 300;

Positioning formwork 10; steel grid frame 20; pipeline 30; support frame 40;

Horizontal steel bars 21; vertical steel bars 22; electrical pipelines 31; plumbing pipelines 32;

Connecting node portion 41 ; supporting portion 42 ; surface supporting portion 421 ; corner supporting portion 422 .

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, intended to explain the present invention, but not to be construed as limitations of the present invention, those skilled in the art can change the above-mentioned embodiments within the scope of the present invention , modification, substitution and variation.

The prefabricated wall body 100, the prefabricated unit body 200, the building system and its construction method according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 to 4 , a prefabricated wall 100 according to an embodiment of the present invention may include: a positioning formwork 10 , a steel grid 20 and a pipeline 30 . The reinforced grid frame 20 is arranged on the outer surface of the positioning formwork 10. Here, the outer surface of the positioning formwork 10, that is, the outdoor side of the positioning formwork 10, is set opposite to the indoor side. The reinforcement grid 20 may include vertical reinforcement bars 22 and horizontal reinforcement bars 21. The vertical reinforcement bars 22 extend vertically, and the horizontal reinforcement bars 21 extend horizontally. The vertical reinforcement bars 22 and the horizontal reinforcement bars 21 are interconnected to form a network. The pipeline 30 can be arranged in the steel grid 20 . After the concrete is poured, the reinforced grid frame 20 can be formed into a reinforced concrete structure with the pipeline 30 prefabricated inside. This structure has high strength and can be used as a load-bearing wall.

Wherein, the positioning template 10 can not only be used as a template when pouring concrete, but also can be used as a fixed skeleton (attached substrate) for various pipelines 30 such as wall reinforcement and plumbing and electricity while ensuring the accurate positioning of the wall, so that the reinforcement and pipelines can be bound together. 30 installation can be completed in the factory, which greatly speeds up the progress of the construction site. In practice, after the prefabricated wall body 100 is processed in the factory, it can be transported to the construction site for assembly and connection, and the construction size is more accurate. After the assembly is completed at the construction site, the concrete is poured and maintained.

As a result, not only the concrete components can be poured at the construction site, but also the structural integrity and seismic performance can be effectively guaranteed, and the problem of poor seismic performance of the previous prefabricated structures that only nodes are poured on site and poor seismic performance can be overcome, especially the traditional prefabricated structures. It is suitable for the shortcomings of high-intensity areas, and effectively reduces the transportation and hoisting costs of prefabricated components, effectively increasing the economic coverage radius of the factory; moreover, the layout of the pipeline 30 and the binding of steel bars can be completed in the factory, and the positioning formwork 10 can also be used as a skeleton and The formwork is used, and construction can be carried out directly after assembly on site. Compared with traditional cast-in-place structures, it greatly reduces the amount of on-site engineering, greatly speeds up the construction progress, shortens the on-site construction period, reduces on-site construction waste, and is energy-saving and environmentally friendly.

The prefabricated wall 100 according to the embodiment of the present invention can realize building factoryization, improve construction progress, reduce transportation costs, facilitate on-site construction, shorten on-site construction period, improve construction accuracy, and because the concrete is poured on site, it can effectively ensure the integrity of the structure It can ensure the mechanical performance of the structure, especially in high-intensity areas, and is suitable for widespread use. Compared with traditional prefabricated concrete wall structures, it greatly reduces the cost of building, transportation and hoisting, and the factory is more economical. Large radius.

Optionally, the pipeline 30 may include various types such as an electrical pipeline 31 and a plumbing pipeline 32, which are not limited in the present invention. For example, in the embodiment shown in FIG. 1 , pipelines 30 include electrical pipelines 31 and plumbing pipelines 32 . Electrical pipelines 31 and plumbing pipelines 32 can be preset in the steel grid frame 20, which is not only convenient for later construction but also has a good wiring effect.

The positioning formwork 10 can be cement pressure board, silicon-calcium board or gypsum board, etc. The boards of these materials are easy to obtain and have high strength, taking into account the functions of the skeleton system and the formwork, effectively reducing the workload of on-site construction, saving cost, and its own It is relatively smooth and flat, without plastering for leveling operation, the flatness can be better guaranteed, and the performance of the prefabricated wall 100 can be improved. Wherein, the positioning formwork 10 can select plates of different materials according to actual conditions, which is not specifically limited in the present invention.

In some embodiments of the present invention, the prefabricated wall body 100 may further include a rotating connector. The rotating connector is connected to the steel mesh frame 20 and is rotatable at the storage position and the connection position. When the rotating connector is in the storage position, the rotating connector can be built into the steel mesh frame 20 to facilitate operations such as transportation and hoisting; When the rotating connector is in the connecting position, the rotating connector can protrude from the steel grid frame 20 to facilitate connection with other structures, and the connection is quick, which further facilitates on-site construction and prefabrication, and improves construction efficiency.

Optionally, the rotating connector can be made of steel bars, so as to better realize the connection with the steel grid frame 20, the connection reliability is high and the prefabrication is convenient.

According to some embodiments of the present invention, the positioning formwork 10 may be provided with assembly holes to facilitate subsequent assembly operations, reducing the strength of the positioning formwork 10 or the prefabricated wall 100 by reducing the number of holes punched on the positioning formwork 10 .

The prefabricated unit body 200 will be described in detail below. As shown in FIG. 2 and FIG. 3 , the prefabricated unit body 200 according to the embodiment of the present invention may include a plurality of walls. A plurality of walls are connected successively to form a ring and surround to form a cavity. Each wall includes a positioning formwork 10, at least one positioning formwork 10 is provided with a steel grid frame 20 on the outer surface, at least one wall is formed as the above-mentioned prefabricated wall 100, and the positioning formworks 10 of multiple walls are connected in sequence.

Therefore, during actual construction, on-site assembly can be carried out in the form of a single or multiple rooms, which better overcomes the problems of assembly and positioning accuracy in the assembly process of traditional prefabricated single-piece structures, and speeds up assembly. While reducing the difficulty of assembly, it can more effectively ensure the assembly accuracy and significantly improve the flexibility of the structure; of course, it is also possible to complete the prefabrication of single-piece walls and corner lap reinforcement cages in the factory, and connect the corner reinforcement on site. Together. After the assembly is completed at the construction site, the concrete is poured and maintained.

In the embodiment shown in Fig. 2, the walls include four, and the cavity is formed as a square cavity. The resulting prefabricated unit 200 has a very wide range of adaptability. Further, the prefabricated wall 100 can be one, that is, a wall is composed of a positioning formwork 10, a steel grid 20 and a pipeline 30, and the outer surface of a positioning formwork 10 connected to the prefabricated wall 100 is provided with a reinforcement grid 20 , the outer sides of the remaining two positioning formworks 10 are not provided with a reinforcement grid frame 20, so as to be connected with other reinforcement structures conveniently.

Of course, it can be understood that the structure of the prefabricated unit body 200 according to the embodiment of the present invention is not limited thereto, the number of walls is not limited to four, and the number of steel grid frames 20 is not limited to two and are arranged on adjacent two sides. On the positioning template 10, it can be flexibly set according to the shape of the actual room.

In the embodiment shown in FIG. 3 , the prefabricated unit body 200 includes four walls, and the two opposite walls are formed as the above-mentioned prefabricated walls 100, that is, the two walls both include the positioning formwork 10 and the setting template located on the inside. The steel grid frame 20 on the outside and the pipeline 30 arranged in the steel grid frame 20, the other two walls are formed by the positioning formwork 10 arranged on the inside and the steel grid frame 20 arranged on the outside, and the steel grid frame 20 is not provided. Line 30. Therefore, after the prefabricated unit body 200 is transported to the construction site, it is only necessary to pour concrete into the steel grid frame 20 and maintain it to initially build a room, which has good constructability.

It can be understood that the four walls of the prefabricated unit body 200 can all be formed as the above-mentioned prefabricated wall body 100, that is, the walls of each prefabricated unit body 200 are formed by the positioning formwork 10 and the steel grid frame 20, and the steel grid frame The pipeline 30 is preset in the 20, and the pipeline 30 and the steel grid 20 can be arranged on the positioning formwork 10 of the wall of the prefabricated unit body 200 as required during actual manufacture.

As shown in FIG. 2 and FIG. 3 , the prefabricated unit body 200 may further include a supporting frame 40 which is detachably arranged in the cavity and supported on a plurality of walls. Thus, the support frame 40 can ensure the structural stability of the positioning formwork 10 in the process of positioning, transportation and concrete pouring, and improve the overall structural stability of the prefabricated unit body 200, and the support frame 40 is easy to disassemble, recyclable, and has better performance. reliable.

The structure of the support frame 40 can be formed in various forms. Optionally, in the embodiment shown in FIG. 2 and FIG. A plurality of supporting parts 42 extending, a plurality of supporting parts 42 comprising a surface supporting part 421 and a corner supporting part 422, the surface supporting part 421 can be supported on the inner wall surface of the wall, and the corner supporting part 422 can be supported on two adjacent The connection of the wall. Therefore, a very good supporting effect can be ensured, so that the prefabricated unit body 200 can avoid deformation during transportation and hoisting, and has very good shape stability.

The present invention also discloses a building system, which may include the above-mentioned prefabricated wall body 100 . In addition, in some embodiments of the present invention, the building system may further include the above-mentioned prefabricated unit body 200 . For example, some walls of the building system can use the above prefabricated wall 100 , and some rooms of the building system can use the above prefabricated unit body 200 .

Therefore, the building system can be prefabricated in the form of prefabricated unit body 200 or prefabricated wall body 100, which can effectively reduce the difficulty of on-site assembly, reduce installation errors, ensure structural accuracy, and significantly improve structural flexibility. Digitization requirements are not strong.

The building system according to the embodiment of the present invention can be formed as a building system with factory formwork, reinforced pipeline 30 and cast-in-place concrete. The on-site construction period improves the construction accuracy, and because the concrete is poured on-site, it can effectively ensure the integrity of the structure and the mechanical performance of the structure, especially in high-intensity areas. It has good applicability and is suitable for widespread use.

As shown in FIG. 4 , during the assembling process of different prefabricated unit bodies 200 , the two positioning templates 10 opposite to each other can be connected as a whole through tension bolts 300 . According to the actual transportation and plane splitting, some positions may need to be prefabricated into a prefabricated wall 100 as shown in FIG. 1 .

It should be noted that the structure shown in the drawings is only a unit body formed by one room, and multiple rooms may form a unit body in the actual implementation process of the present invention. The attached drawing is only a schematic plan view of the unit body. Holes can be opened on the facade according to the construction drawing. After the hole formwork is installed on site, the thickness of the wall can be ensured by adjusting the formwork at the hole and the unsealed part of the wall.

The present invention also discloses a construction method of a building system. As shown in FIG. 5 , the construction method of a building system according to an embodiment of the present invention may include the following steps:

S1: Split the construction plan, split the house into individual walls and/or units, and process the above-mentioned prefabricated walls and/or the above-mentioned prefabricated units according to the split results.

S2: Transport the prefabricated walls and/or prefabricated units to the construction site for hoisting and assembly, and perform floor construction after pouring concrete and curing.

The construction method of the building system will be specifically described below in combination with the prefabricated wall body 100 and the prefabricated unit body 200 according to the embodiment of the present invention. First, obtain the construction plan of the building system, and split the house into walls and/or units according to the construction plan. Specifically, some rooms can be split into units, and the walls of some rooms can be split into single-piece walls . For example, for a building system with a large number of rooms, multiple rooms can be divided into corresponding multiple units; for a building system with a small number of rooms, you can choose to split multiple rooms into corresponding multiple units, Or split multiple walls of the room into corresponding multiple single walls.

In actual construction, a hybrid splitting method can be used, that is, some rooms are split into corresponding multiple units, and some walls are split into corresponding single-piece walls, so that prefabricated walls 100 and prefabricated units can be used at the same time. 200 for construction, which split to use can be flexibly selected according to the actual construction situation and housing conditions.

After the splitting is completed, the prefabricated wall body 100 corresponding to the single wall body and the prefabricated unit body 200 corresponding to the unit body can be processed in the factory according to the splitting result. The completed prefabricated wall 100 and prefabricated unit body 200 can be transported to the construction site, and the frame of the building system is initially formed after hoisting and assembly, and then the concrete is poured and maintained, and then the floor is installed and the concrete is poured and maintained. Construction of building systems.

The construction method of the building system according to the embodiment of the present invention can realize building factoryization, improve the construction progress, reduce transportation costs, facilitate on-site construction, shorten the on-site construction period, improve construction accuracy, effectively ensure the structural integrity of the building system, and ensure the integrity of the structure. The mechanical performance, especially the applicability in high-intensity areas, is suitable for widespread use. Compared with traditional prefabricated concrete wall structures, it greatly reduces the cost of building, transportation and hoisting. The more economical coverage of the factory is large.

Optionally, in step S1, the processing method for processing the prefabricated wall body 100 and the prefabricated unit body 200 may further include the following steps:

S11: Process the positioning formwork 10 according to the splitting result, and support the support frame 40 of the prefabricated unit body 200 on the positioning formwork 10 .

S12: Processing the steel grid 20 and installing the pipeline 30 on the steel grid 20 .

S13: Fix the steel grid frame 20 on the positioning template 10.

Wherein, in step S11, the operation of supporting the support frame 40 of the prefabricated unit body 200 on the positioning formwork 10 is for the prefabricated unit body 200, and for the case where only the prefabricated wall body 100 needs to be processed, this operation can be omitted. operate. The above-mentioned processing method is convenient to implement, and can further improve construction efficiency and construction accuracy.

Further, as shown in FIG. 5, the construction method of the building system according to the embodiment of the present invention may further include the following steps:

S3: Carry out indoor and outdoor decoration.

That is to say, indoor and outdoor decoration construction can be carried out after the building system is preliminarily completed. The construction methods are known to those skilled in the art and will not be described in detail here.

In a specific embodiment of the present invention, the building system performs the following steps during construction:

1. Split the construction plan, divide single or multiple rooms into several units or single walls, and complete the prefabrication in the factory. The following steps are used for prefabrication:

(a) Split the construction plan and divide single or multiple rooms into units or single walls.

(b) According to the disassembled unit body, cut and position the cement pressure board, silicon-calcium board, gypsum board, etc., and reserve holes for tie-in assembly, and install the support frame 40 in the wall to ensure transportation, hoisting and concrete Stability of structures during pouring.

(c) Bind the steel bars in the wall and install the pipelines 30 such as plumbing, heating and electricity according to the construction drawing, and fix them on the cement pressure board, silicon-calcium board, gypsum board, etc.

2. For on-site assembly, the following steps can be used specifically:

(a) Transport the prefabricated components to the construction site, and hoist them in place according to the pre-arranged sequence.

(b) Fixing different units or single walls to each other.

(c) Complete wall concrete pouring and curing.

(d) Completion of the installation and concrete pouring of the laminated slab.

3. Carry out indoor and outdoor decoration. The specific decoration method can adopt the existing method or the improvement of the existing method, which will not be described in detail here.

Other configurations of the building system and other operations of the construction method according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inner, outer, radial, circumferential, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of this specification, descriptions with reference to the terms "embodiment" or "specific example" mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention middle. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Claims (14)

1. A prefabricated wall, characterized in that it comprises: positioning template; Reinforcing grid, the reinforcing grid is erected on the outer surface of the positioning formwork, the reinforcing grid includes vertical reinforcing bars extending in the vertical direction and horizontal reinforcing bars extending in the horizontal direction; Pipelines, the pipelines are arranged in the steel grid. 2. The prefabricated wall according to claim 1, wherein the pipelines include at least one of electrical pipelines and plumbing pipelines. 3. The prefabricated wall according to claim 1, characterized in that, the positioning formwork is a cement pressure board, silicon-calcium board or gypsum board. 4. The prefabricated wall according to claim 1, further comprising: A rotating connecting piece, the rotating connecting piece is connected with the steel mesh frame and is rotatable at the storage position and the connecting position, and the rotating connecting piece is built in the steel mesh frame when it is in the storage position and connected to it when it is in the storage position. Stretch out from the steel grid frame during the position. 5. The prefabricated wall according to claim 1, characterized in that the positioning formwork is provided with assembly holes. 6. A prefabricated unit body, characterized in that it comprises: A plurality of walls, the plurality of walls are connected successively to form a ring and a cavity is formed around them, each of the walls includes a positioning template, at least one of the positioning templates is provided with a reinforced grid on the outer surface and at least One said wall body is formed as the prefabricated wall body according to any one of claims 1-5, and the positioning templates of a plurality of said wall bodies are connected in sequence. 7. The prefabricated unit body according to claim 6, characterized in that, the walls comprise four, and the cavity is formed as a square cavity. 8. The prefabricated unit body according to claim 7, characterized in that, the outer surface of each positioning formwork is provided with the steel mesh frame and the prefabricated walls are two and oppositely arranged, adjacent to each other. The two steel grid frames are connected. 9. The prefabricated unit according to claim 6, further comprising: A support frame, the support frame is detachably arranged in the cavity and supported on a plurality of the walls. 10. The prefabricated unit body according to claim 9, wherein the support frame is formed as a star frame and includes a connecting node portion and a plurality of support portions extending outward, and the plurality of support portions include supports on The surface support part on the inner wall surface of the wall body and the corner support part supported at the junction of two adjacent walls. 11. A building system, characterized by comprising the prefabricated wall body according to any one of claims 1-5. 12. A construction method for a building system, comprising the following steps: S1: Split the construction plan, split the house into units and/or single walls, and process the prefabricated walls according to any one of claims 1-5 and/or according to the rights The prefabricated unit described in any one of claims 6-11; S2: Transport the prefabricated wall and/or the prefabricated unit body to the construction site for hoisting and assembly, and perform floor construction after pouring concrete and curing. 13. The construction method of the building system according to claim 12, characterized in that, in the step S1, the processing method comprises the following steps: S11: Process the positioning template according to the split result, and support the support frame of the prefabricated unit body on the positioning template; S12: Process the steel grid and install the pipeline on the steel grid; S13: Fix the steel grid frame on the positioning formwork. 14. The construction method of building system according to claim 12, is characterized in that, also comprises the following steps: S3: Carry out indoor and outdoor decoration.