ACC plate wall door opening edge structure with prefabricated constructional columns

Abstract

The utility model relates to the technical field of buildings, in particular to a constructional column applied to an ACC plate wall door opening side. The prefabricated constructional columns and the prefabricated ACC plates are prefabricated in a factory and are assembled and connected with the prefabricated ACC plates through concave-convex splicing structures, and supporting parts are arranged at the tops of the prefabricated constructional columns and the prefabricated ACC plates to bear loads above door openings. Inclined through holes are formed in the prefabricated constructional columns, reinforcing steel bars with spiral threads are inserted into the through holes, bonding materials are poured into the through holes, and a cable-stayed-extruded composite stress system is formed. During construction, plastering-free high flatness is achieved through dry method assembly, and the bottom is fixed through a connecting piece. The problems that a cast-in-place constructional column is low in construction efficiency and prone to cracking are solved, the structural stability of a door opening is improved, and the prefabricated wall is suitable for efficient construction.

Description

A doorway edge structure for ACC slab wall with prefabricated structural columns Technical Field

[0001] This utility model relates to the field of building technology, specifically to an ACC panel wall door opening edge structure with prefabricated structural columns. Background Technology

[0002] Autoclaved aerated concrete (AAC) originated in Europe. Since the world's first AAC plant was built in Sweden in 1929, AAC has gained popularity due to its advantages such as lightweight and porous structure, thermal insulation, fire resistance, good workability, convenient construction, and industrial production. By 2019, AAC panels (hereinafter referred to as ACC panels) were widely used in over 50 countries worldwide. In some countries, ACC panels accounted for up to 40% of building envelope systems. Currently, buildings using ACC panels have exceeded 400 meters in height. Since introducing ACC panel production lines from Japan in 1997, my country has established its own domestic production lines, achieving significant advantages in lower production costs and superior quality. According to incomplete statistics, as of 2019, my country's ACC panel production capacity was approximately 268 million cubic meters. 3 Annual output is approximately 160 million cubic meters. 3 With the advancement of my country's building industrialization, ACC board partitions have gradually become one of the preferred materials for partitions in prefabricated buildings.

[0003] The use of ACC panel walls for partition walls has many advantages over traditional masonry techniques, including faster construction speed, less environmental impact, more flexible structure, greater overall cost-effectiveness, and higher construction quality. In Europe and America, when using ACC panel walls, structural columns are required. The design of the structural columns is adapted to local conditions, combining specifications and industrialization requirements, and using steel, wood, or concrete columns. Although steel and wood structural columns are more common in ACC panel walls, reinforced concrete structural columns are generally used in earthquake-prone areas, high-rise buildings, fire compartment walls, and walls in areas with dense pipelines. The concrete is poured in place. The current national standard GB / T15762-2020 "Autoclaved Aerated Concrete Board", the industry standard DBJ / T17-2020 "Technical Standard for Application of Autoclaved Aerated Concrete Products", the national standard design atlas 13J104 "Construction of Autoclaved Aerated Concrete Blocks and Boards" and 06CG05 "Construction of Autoclaved Lightweight Sand Aerated Concrete (ACC) Blocks and Boards" do not provide the construction methods and requirements for structural columns (including the middle, ends and edges of door and window openings) of ACC board partition walls. This is obviously an omission for ACC board walls in seismic fortification areas. Furthermore, practice has shown that when structural columns are not installed on ultra-long ACC panel walls (e.g., exceeding 6m in length), door (window) openings exceeding a certain width, door openings where doors are frequently opened and closed, and heavy doors, cracks often occur at the top corners of the walls and door (window) openings. Currently, designers often refer to the construction methods of masonry walls and install cast-in-place reinforced concrete structural columns. Although the surface of ACC panel walls without cast-in-place reinforced concrete structural columns can achieve the required flatness without plastering under meticulous construction conditions (saving on leveling plastering materials and labor, and also eliminating the common quality defects of hollow plastering and cracking in the later plastering layer), if cast-in-place reinforced concrete structural columns are installed in the wall, the concrete is cast on-site with erected formwork, often resulting in bulging and leakage of grout, requiring secondary manual grouting at the top, making it difficult to achieve the required flatness for plaster-free wall surfaces. In addition, the installation of cast-in-place reinforced concrete structural columns in ACC panel walls (especially around door openings) often disrupts the continuous installation of ACC panels, leading to extended construction periods.

[0004] In view of the above-mentioned technical problems, this utility model is proposed in this study. Summary of the Invention [Summary of the Utility Model]

[0005] The technical problem to be solved by this utility model is to provide a door opening edge structure for ACC panel walls with prefabricated structural columns. By setting prefabricated structural columns at the door opening edge in conjunction with prefabricated ACC panels, the problems of low construction efficiency, poor flatness, and difficulty in guaranteeing the forming quality of cast-in-place structural columns at the door opening edge of ACC panel walls are solved, which can achieve rapid construction and reduce construction waste.

[0006] To solve the above-mentioned technical problems, this utility model proposes an ACC panel wall door opening edge structure with prefabricated structural columns, including at least one prefabricated structural column on one side of the door opening and a prefabricated ACC panel located between upper and lower floors and spliced ​​with the prefabricated structural column. Both the prefabricated structural column and the prefabricated ACC panel are prefabricated structures, and adhesive is provided at both ends of the prefabricated structural column, the bottom surface of the prefabricated ACC panel, and the splice between the two. Furthermore, adhesive or flexible filler material is provided on the top surface of the prefabricated ACC panel. The top of the prefabricated structural column faces the prefabricated ACC panel. One side of the CC panel extends to form a support portion that overlaps with the precast ACC panel. The support portion is used to bear the load above the doorway. The precast structural column has longitudinally spaced through holes that penetrate the precast structural column laterally. A reinforcing steel rod extending into the precast ACC panel is inserted into the through hole. The diameter of the through hole is φA, and the diameter of the reinforcing steel rod is φB. Therefore, φA > φB. The through hole is filled with an adhesive that can be bonded to the reinforcing steel rod, thereby connecting the reinforcing steel rod and the precast structural column into one piece.

[0007] As described above, in an ACC panel wall door opening structure with prefabricated structural columns, the axis of the through hole forms an angle α with the horizontal plane, where 0°<a≤30°, thus causing the opening of the through hole to tilt upwards.

[0008] The ACC slab wall doorway edge structure with precast structural columns as described above, wherein the concrete strength grade of the precast structural columns is C20, C25, C30, C35, or C40.

[0009] As described above, the ACC panel wall door opening edge structure with precast structural columns has a convex-concave splicing structure that engages with each other between the precast structural columns and the splicing sides of the precast ACC panels. The convex-concave splicing structure consists of a protruding ridge on one side of the precast structural column and a groove on one side of the precast ACC panel that engages with the protruding ridge; or the convex-concave splicing structure consists of a groove on one side of the precast structural column and a protruding ridge on one side of the precast ACC panel that engages with the groove.

[0010] As described above, the ACC panel wall door opening edge structure with prefabricated structural columns has a reinforced connection structure formed on the surface of the reinforcing steel rod to strengthen the bonding with the adhesive.

[0011] As described above, the door opening edge structure of an ACC panel wall with prefabricated structural columns, wherein the reinforcing connection structure is a spiral convex or concave pattern arranged along the length of the reinforcing steel bar.

[0012] As described above, an ACC slab wall door opening edge structure with prefabricated structural columns is provided with a connector at the bottom of the prefabricated structural columns to connect with the floor slab or beam of the lower floor to fix the bottom of the prefabricated structural columns.

[0013] As described above, the ACC slab wall door opening edge structure with precast structural columns includes a first connecting part and a second connecting part. The first connecting part is connected to one side of the bottom of the precast structural column, and the second connecting part is connected to the floor slab or beam of the lower floor, thereby fixing the bottom of the precast structural column.

[0014] As described above, the ACC panel wall door opening edge structure with prefabricated structural columns has a clearance groove on one side of its bottom for avoiding connecting parts.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] 1. This application discloses an ACC panel wall door opening edge structure with prefabricated structural columns. By setting prefabricated structural columns on the partition wall, compared with the previous method of directly installing the door on the partition wall, it can prevent problems such as unstable door frame and cracked top corner of door opening during later use.

[0017] 2. This application overcomes the problems of long construction cycles, difficulty in ensuring quality, and environmental pollution caused by wet work during on-site concrete column pouring by prefabricating precast structural columns and precast ACC panels in the factory and assembling them on-site using a dry construction method. It offers advantages such as high construction efficiency, high quality assurance, high surface flatness of the wall formed by the combination of precast structural columns and precast ACC panels, significant labor savings, and reduced waste and dust generated during on-site construction.

[0018] 3. This application also includes a support section at the top of the precast structural column. This support section can overlap with the precast ACC slab to form a unified load-bearing structure, making the connection between the precast structural column and the precast ACC slab more stable. After the door is installed, they can jointly support the door frame and prevent it from loosening. Furthermore, the support section increases the support area at the top of the precast structural column, further enhancing its support capacity and facilitating the support of the door header panel or beam above the doorway.

[0019] 4. This application sets reinforcing steel bars in the precast structural columns and connects them to the precast ACC panels, which can further enhance the connection strength between the precast ACC panels and the precast structural columns, making the connection between the two more stable. Figure Description

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 is a structural schematic diagram of this utility model.

[0022] Figure 2 is an exploded structural diagram of this utility model.

[0023] Figure 3 is another exploded structural diagram of this utility model.

[0024] Figure 4 is a structural schematic diagram of the prefabricated structural column in this utility model.

[0025] Figure 5 is a schematic diagram of the through hole in this utility model.

[0026] Figure 6 is another structural schematic diagram of the prefabricated structural column in this utility model.

[0027] Figure 7 is a schematic diagram of the reinforcing steel bar in this utility model.

[0028] In the figure: 1. Precast structural column; 10. Support part; 2. Precast ACC panel; 3. Concave-convex splicing structure; 30. Protruding ridge; 31. Groove; 4. Through hole; 5. Reinforcing steel bar; 6. Reinforcing connection structure; 7. Connector; 70. First connection part; 71. Second connection part; 8. Clearance groove. Detailed Implementation Methods

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] As shown in Figures 1-7, this utility model includes an ACC panel wall doorway edge structure with precast structural columns, comprising a precast structural column 1 at least on one side of the doorway and a precast ACC panel 2 located between upper and lower floors and spliced ​​with the precast structural column 1. Both the precast structural column 1 and the precast ACC panel 2 are precast structures. The precast structural column 1 is a precast reinforced concrete structure, and the precast ACC panel 2 is a precast autoclaved aerated concrete panel. Adhesive is provided at both ends of the precast structural column 1, the bottom surface of the precast ACC panel 2, and the splice between the two. Adhesive or flexible filler is also provided on the top surface of the precast ACC panel 2. The precast structural column 1 extends from the top towards the precast ACC slab 2 to form a support part 10 that overlaps with the precast ACC slab 2. The support part 10 is used to bear the load above the doorway. The precast structural column 1 has longitudinally spaced through holes 4 that penetrate horizontally through the precast structural column 1. A reinforcing steel rod 5 extending into the precast ACC slab 2 is inserted into the through hole 4. The diameter of the through hole 4 is φA, and the diameter of the reinforcing steel rod 5 is φB. Therefore, φA > φB. The through hole 4 is filled with an adhesive that can be bonded to the reinforcing steel rod 5, thereby connecting the reinforcing steel rod 5 and the precast structural column 1 into one piece.

[0031] It should be noted that adhesive is used to strengthen the connection between adjacent precast ACC slabs 2 and between precast ACC slabs 2 and precast structural columns 1. Adhesive is also used at the top of precast ACC slabs 2 and precast structural columns 1 to strengthen the connection with the floor slabs or beams of the upper floor. Similarly, adhesive is used at the bottom of precast ACC slabs 2 and precast structural columns 1 to strengthen the connection with the floor slabs or beams of the lower floor. The top of the precast ACC slabs 2 can be provided with adhesive or flexible filler material. The adhesive can be fine aggregate concrete, mortar, or a combination of adhesives, and the flexible filler material can be expanding foam. It should also be noted that the adhesive and flexible filler materials are not shown in this application.

[0032] In this application, the adhesive material at the upper and lower ends and the splicing surfaces of the precast structural column 1 and the precast ACC plate 2 is not shown, and the adhesive material at the through hole 4 is not marked. The adhesive material can be fine stone concrete, mortar, or adhesive, or one or more combinations thereof.

[0033] In this application, the concrete strength grade of the precast structural column 1 is C20, C25, C30, C35, or C40. A convex-concave splicing structure 3 is provided between the splicing sides of the precast structural column 1 and the precast ACC panel 2, which engages with each other. The convex-concave splicing structure 3 consists of a protruding ridge 30 on one side of the precast structural column 1 and a groove 31 on one side of the precast ACC panel 2 that engages with the protruding ridge 30; or the convex-concave splicing structure 3 consists of a groove 31 on one side of the precast structural column 1 and a protruding ridge 30 on one side of the precast ACC panel 2 that engages with the groove 31. By providing the convex-concave splicing structure 3, the connection between the precast structural column 1 and the precast ACC panel 2 can be made more stable, thereby making the entire wall more stable.

[0034] This application, by installing precast structural columns 1 on the partition wall, prevents problems such as unstable door frames and cracked corners of door openings during later use, compared to the previous method of directly installing doors onto the partition wall. Furthermore, compared to the on-site casting of precast structural columns 1, this application overcomes the problems of long construction cycles, difficulty in ensuring quality, and environmental pollution caused by wet work during on-site concrete column casting by prefabricating the precast structural columns 1 and precast ACC panels 2 in the factory and assembling them on-site using dry construction methods. It offers advantages such as high construction efficiency, high quality assurance, high surface flatness of the wall formed by the combination of precast structural columns 1 and precast ACC panels 2, significant labor savings, and reduced waste and dust generated during on-site construction.

[0035] Furthermore, this application also provides a support portion 10 at the top of the precast structural column 1. The support portion 10 can overlap with the precast ACC slab 2 to form a unified load-bearing structure, making the connection between the precast structural column 1 and the precast ACC slab 2 more stable. After the door is installed, it can jointly support the door frame to prevent the door frame from loosening, and it can also provide support for the precast ACC slab 2. In addition, the support portion 10 can increase the support area at the top of the precast structural column 1, which can further improve the support capacity at the top of the precast structural column 1, such as supporting door beams or door headboards.

[0036] As shown in Figures 2 to 5, to further strengthen the connection between the precast structural column 1 and the precast ACC slab 2, this application uses a reinforcing steel rod 5 to connect with the precast ACC slab 2 as a whole, and sets the diameter φA of the through hole 4 to be larger than the diameter φB of the reinforcing steel rod 5. This allows for faster insertion of the reinforcing steel rod 5, and also allows both the sidewalls of the reinforcing steel rod 5 and the through hole 4 to be filled with adhesive, thereby increasing the connection strength between the reinforcing steel rod 5 and the precast structural column 1.

[0037] During prefabrication, the prefabricated structural column 1 has pre-drilled through holes 4 for installing reinforcing steel bars 5. After the prefabricated structural column 1 is installed, adhesive is injected into the through holes 4, and then the reinforcing steel bars 5 are inserted into the through holes 4 to adhere the adhesive. Subsequently, the reinforcing steel bars 5 are inserted into the prefabricated ACC plate 2 using tools such as a hammer. After the adhesive has solidified, the reinforcing steel bars 5 can be fixedly connected to the prefabricated structural column 1 and the prefabricated ACC plate 2 respectively. The prefabricated structural column 1 can then be connected to the prefabricated ACC plate 2 as a whole through the reinforcing steel bars 5, sharing the load. This makes the door frame more stable after installation and prevents the prefabricated structural column 1 from loosening under long-term use. It should be noted that the strength of the precast structural column 1 is generally above 25 MPa, so it is necessary to pre-set through holes 4 to prevent damage to the precast structural column 1 during later opening, and also to avoid the problems of construction inconvenience and inconsistent hole quality caused by later opening. The strength of the precast ACC slab 2 is generally around 5 MPa, so as long as force is applied to the reinforcing steel rod 5, the reinforcing steel rod 5 can be inserted into the precast ACC slab 2.

[0038] As shown in Figures 4 and 5, as a further embodiment, the axis of the through hole 4 forms an angle α with the horizontal plane, where 0° < α ≤ 30°. This causes the opening of the through hole 4 to tilt upwards, preferably with an angle α of 5°. In this embodiment, by setting the through hole 4 to have an angle α with the horizontal plane, the shear strength can be improved, causing the reinforcing steel bar 5 to generate an axial component force when subjected to shear, forming a "tension-compression" composite stress mode. The load transfer path changes from single shear to the reinforcing steel bar 5 being subjected to tension and the precast structural column 1 being subjected to synergistic action, avoiding local brittle failure of the precast ACC slab 2. Since the through hole 4 is inclined downwards, it is convenient for workers to hammer the reinforcing steel bar 5 into the precast ACC slab 2 using tools such as hammers during construction. Furthermore, since the through hole 4 is inclined downwards and its opening is inclined upwards, it is convenient to inject adhesive, and the adhesive will not flow out of the opening after injection. It should be noted that the adhesive is not shown in this application.

[0039] As shown in Figure 7, as a further embodiment, the surface of the reinforcing steel rod 5 is formed with a reinforcing connection structure 6 to strengthen the bonding with the adhesive. The reinforcing connection structure 6 is a spiral raised or recessed pattern arranged along the length of the reinforcing steel rod 5. By providing the reinforcing connection structure 6 on the reinforcing steel rod 5, the adhesive material can be more firmly bonded to the reinforcing steel rod 5, thereby making the connection between the reinforcing steel rod 5 and the precast structural column 1 and the precast ACC panel 2 more stable.

[0040] As shown in Figure 6, as a further embodiment, the bottom of the precast structural column 1 is provided with a connector 7 to connect with the floor slab or beam of the lower floor to fix the bottom of the precast structural column 1. The connector 7 includes a first connecting part 70 and a second connecting part 71. The first connecting part 70 is connected to one side of the bottom of the precast structural column 1, and the second connecting part 71 is connected to the floor slab or beam of the lower floor, thereby fixing the bottom of the precast structural column 1. By providing the connector 7, the precast structural column 1 can be further fixed. When fixing the bottom of the precast structural column 1, the first connecting part 70 can be fixed to the side of the precast structural column 1 by means of metal nails or expansion bolts. Similarly, the second connecting part 71 can be connected to the floor slab or beam of the lower floor, thus fixing the bottom of the precast structural column 1. In addition, a clearance groove 8 can be provided on the precast structural column 1 to avoid the connector 7, providing physical accommodation space for the connector 7, eliminating the risk of hard collision between components, and also facilitating positioning and installation of the connector 7. In addition, grooves or holes can be provided on the connector 7, and a galvanized layer can be provided on the surface of the connector 7. The grooves or holes are provided to allow the adhesive to bond with the connector 7, which can further make the connection of the precast structural column 1 more stable, while the galvanized layer can further prevent corrosion of the components and improve their service life. It should be noted that the grooves or holes and the galvanized layer are not shown in this application.

[0041] As shown in Figures 1 to 7, this application also provides a construction method for an ACC slab wall door opening edge structure with prefabricated structural columns, including the use of the aforementioned ACC slab wall door opening edge structure with prefabricated structural columns. The construction method is as follows:

[0042] S1. Layout: Based on the construction drawings and actual site conditions, arrange the precast ACC panels 2 and precast structural columns 1, clarifying their positions, dimensions, and quantities. The precast structural columns 1 will have through holes 4 formed during fabrication. These through holes 4 will be inclined upwards during installation, with the angle between the axis of the through hole 4 and the horizontal plane being 'a', where 0° < a ≤ 30°. In this step, labels can be added to the precast structural columns 1 and precast ACC panels 2 for differentiation, facilitating later assembly by construction personnel.

[0043] S2. Prepare installation materials: Transport the main materials, auxiliary materials, and installation equipment to the construction site. The main materials include precast structural columns 1, precast ACC panels 2, and reinforcing steel bars 5. The auxiliary materials include adhesives, connectors 7, and nails.

[0044] S3. Install prefabricated ACC panel 2: Install prefabricated ACC panels 2 in sequence according to the layout order. When installing prefabricated ACC panels 2, adhesive can be applied to the bottom of the prefabricated ACC panels 2, and adhesive or flexible filler material, such as expanding foam, can be applied to the top of the prefabricated ACC panels 2.

[0045] S4. Install precast structural column 1: Apply adhesive to the splice and the bottom of precast structural column 1, and splice the precast structural column 1 with the corresponding precast ACC panel 2. By applying adhesive, the connection strength between the precast structural column 1 and the precast ACC panel 2 can be further strengthened.

[0046] S5. Install reinforcing steel rod 5: Pour the mixed adhesive into the through hole 4 and insert the reinforcing steel rod 5. After the reinforcing steel rod 5 passes through the through hole 4, it continues to be inserted into the precast ACC slab 2. Wipe away the adhesive that is squeezed out of the through hole 4 to complete the installation. In this step, in order to further enhance the stability of the structural column 1, the connector 7 can be further installed. When installing the connector 7, the first connecting part 70 can be fixed to the side of the precast structural column 1 by means of metal nails or expansion bolts. In the same way, the second connecting part 71 can also be fixed to the floor slab or beam, thus fixing the bottom of the precast structural column 1.

[0047] In this embodiment, the precast structural column 1 and the precast ACC panel are prefabricated in the factory and assembled on site using the above construction method. This avoids the time-consuming processes of formwork, pouring, and curing of traditional cast-in-place concrete columns, significantly shortening the construction cycle. The combination of standardized production of precast components and rapid on-site assembly enables immediate use, which is especially suitable for engineering scenarios with tight schedules.

[0048] Furthermore, this application utilizes precast structural columns 1 and precast ACC panels 2, employing a dry construction method throughout the entire process to avoid issues such as sewage discharge and formwork waste caused by cast-in-place concrete.

Claims

1. A doorway edge structure for an ACC slab wall with prefabricated structural columns, characterized in that... The system includes a precast structural column (1) located at least on one side of the doorway and a precast ACC slab (2) located between the upper and lower floors and spliced ​​with the precast structural column (1). Both the precast structural column (1) and the precast ACC slab (2) are precast structures. Adhesive is provided at both ends of the precast structural column (1), the bottom surface of the precast ACC slab (2), and the splice between the two. Adhesive or flexible filling material is provided on the top surface of the precast ACC slab (2). The top of the precast structural column (1) extends toward one side of the precast ACC slab (2) to form a support part (1) that overlaps with the precast ACC slab (2). 0), the support part (10) is used to bear the load above the door opening. The precast structural column (1) is longitudinally spaced with through holes (4) that penetrate horizontally through the precast structural column (1). A reinforcing steel rod (5) extending into the precast ACC plate (2) is inserted into the through hole (4). The diameter of the through hole (4) is φA and the diameter of the reinforcing steel rod (5) is φB. Then: φA > φB. The through hole (4) is filled with an adhesive that can be bonded to the reinforcing steel rod (5) so that the reinforcing steel rod (5) and the precast structural column (1) are connected as one.

2. The ACC slab wall doorway edge structure with prefabricated structural columns according to claim 1, characterized in that... The axis of the through hole (4) forms an angle α with the horizontal plane, so 0°<a≤30°, thereby causing the opening of the through hole (4) to tilt upwards.

3. The ACC slab wall doorway edge structure with prefabricated structural columns according to claim 1, characterized in that... The concrete strength grade of the precast structural column (1) is C20, C25, C30, C35, or C40.

4. The ACC panel wall opening edge construction with precast construction column according to claim 1, characterized in that The precast structural column (1) and the precast ACC panel (2) are provided with a convex-concave splicing structure (3) that engages with each other. The convex-concave splicing structure (3) consists of a protruding ridge (30) on one side of the precast structural column (1) and a slot (31) on one side of the precast ACC panel (2) that engages with the protruding ridge (30); or the convex-concave splicing structure (3) consists of a slot (31) on one side of the precast structural column (1) and a protruding ridge (30) on one side of the precast ACC panel (2) that engages with the slot (31).

5. The ACC slab wall doorway edge structure with prefabricated structural columns according to claim 1, characterized in that... The surface of the reinforcing steel rod (5) is formed with an enhanced connection structure (6) that strengthens the bonding with the adhesive.

6. The ACC slab wall doorway edge structure with prefabricated structural columns according to claim 5, characterized in that... The reinforcing connection structure (6) is a spiral convex or concave pattern arranged along the length of the reinforcing steel bar (5).

7. The ACC slab wall doorway edge structure with prefabricated structural columns according to claim 1, characterized in that... The bottom of the precast structural column (1) is provided with a connector (7) to connect with the floor slab or beam of the lower floor to fix the bottom of the precast structural column (1).

8. The ACC panel wall opening edge construction with precast construction column according to claim 7, characterized in that The connector (7) includes a first connecting part (70) and a second connecting part (71). The first connecting part (70) is connected to one side of the bottom of the precast structural column (1), and the second connecting part (71) is connected to the floor slab or beam of the lower floor, thereby fixing the bottom of the precast structural column (1).

9. The ACC slab wall doorway edge structure with prefabricated structural columns according to claim 7, characterized in that... The bottom side of the precast structural column is provided with a clearance groove (8) for avoiding the connector (7).

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