3D printing concrete wall column frame structure and construction method

Abstract

The application provides a 3D printing concrete wall column frame structure and a construction method. The frame structure comprises a first column body and a first wall body which are 3D printed. The first column body is provided with a first cavity. The first wall body is provided with a plurality of second cavities, and a second cavity close to the first column body is communicated with the first cavity to form a connecting cavity. The structure is printed layer by layer at a set height, and is provided with steel bars and column hoop bars on each layer. The first longitudinal bars are arranged in the first cavity and connected with the steel bars of the base part at one end and arranged at the bottom of the first cavity at the other end. The second longitudinal bars are connected with the column hoop bars, arranged in the first cavity at one end and extended to the outside of the structure at the other end. After the structure is printed and formed, concrete is poured in the connecting cavity. Compared with the traditional 3D printing concrete post-implantation steel cage construction method, the 3D printing concrete wall column frame structure can not only form a reliable wall column frame connecting structure, but also improve the convenience of construction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building structure, and in particular, relates to a 3D-printed concrete wall column frame structure and a construction method. BACKGROUND

[0002] In recent years, the rapid development of 3D-printed concrete technology has broken through the limitations of traditional rule-based building structures. The cost is basically decoupled from the geometric complexity, and there is no essential difference in the process flow between printing a complex organic shape and a simple cube, which can greatly release the "manufacturing freedom".

[0003] In order to reduce the waste of 3D-printed concrete materials, the load-bearing performance of the printed structure and the material utilization rate are key design problems that need to be considered. At present, in the 3D-printed concrete multi-story building, the integration of the printed structure still has difficulties. For example, how to ensure the effective transfer of loads at the wall column joint and the interlayer connection is a technical problem that needs to be solved urgently.

[0004] In addition, since pure 3D-printed concrete is a brittle material and cannot be used as the main load-bearing component, the lack of effective and convenient construction of reinforcing bars is the most fundamental structural challenge faced by integrated 3D-printed multi-story buildings. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a 3D-printed concrete wall column frame structure and a construction method to solve the above problems.

[0006] The present application adopts the following scheme:

[0007] The present application provides a 3D-printed concrete wall column frame structure, which comprises a 3D-printed structure body, which comprises at least one first column body and at least one hollow first wall body connected to the first column body;

[0008] The first column body is provided with a first cavity matched in number with the first wall body; the first wall body is provided with a first filling path to form a plurality of second cavities, and a second cavity close to the first column body is in communication with the first cavity to form a connecting cavity; the structure body is printed layer by layer at a set height, and on each layer, a first transverse steel bar matched with the first wall body, a second transverse steel bar matched with the first cavity connected to the first transverse steel bar, and a column hoop matched with the first column body connected to the second transverse steel bar are placed;

[0009] at least one first longitudinal reinforcement arranged in the first cavity and connected to the base part at one end and arranged at the bottom of the first cavity at the other end; and at least one second longitudinal reinforcement connected to the column hoop reinforcement, arranged in the first cavity at one end and extending out of the structure at the other end;

[0010] After the structure is printed, the concrete is poured in the connecting cavity.

[0011] Further, the second cavity is further provided with a second filling path to form a plurality of sub-cavities.

[0012] Further, the sub-cavities are triangular.

[0013] Further, the first transverse reinforcement, the second transverse reinforcement and the column hoop reinforcement are connected by welding.

[0014] Further, the second longitudinal reinforcement is arranged at the center of the first cavity.

[0015] Further, the first connecting mechanism arranged in the first cavity comprises a hollow connecting piece with upper and lower end plates, and the side wall of the connecting piece is provided with an opening; a sleeve is arranged in the connecting piece; the lower end of the first longitudinal reinforcement is connected to the upper end of the sleeve through the upper end plate of the connecting piece, and the other end extends into the first cavity; the upper end of the third longitudinal reinforcement arranged in the base part is connected to the lower end of the sleeve through the lower end plate of the connecting piece.

[0016] Further, the second connecting structure is used to connect the 3D printed concrete wall column frame structure arranged in the upper layer; the upper end of the second longitudinal reinforcement is connected to the sleeve of the second connecting structure.

[0017] Further, the first longitudinal reinforcement and the third longitudinal reinforcement are connected to the sleeve by threads.

[0018] The application also provides a construction method of the 3D printed concrete wall column frame structure, comprising the following steps:

[0019] First step: printing the structure by layer-by-layer upward printing, first printing the first layer of the first column and the first wall at a set height;

[0020] Second step: placing the steel bars on the first layer structure; first, the first transverse reinforcement and the second transverse reinforcement are connected by welding, and then they are placed on the first layer of 3D printed structure; the column hoop reinforcement is placed on the first layer of structural column and welded with the second transverse reinforcement;

[0021] Third step: install the connecting mechanism; first, place the connecting sleeve inside the connecting piece, and connect with the third longitudinal rib of the base part and the first longitudinal steel located in the first cavity;

[0022] Fourth step: continue to print the structure of the next layer with the set height, and lay the transverse steel and column hoop; until the 3D printing of the whole structure is completed; then insert the second longitudinal steel into the first cavity and bind and fix it on the column hoop;

[0023] Fifth step: pour the concrete in the connecting cavity;

[0024] If there is a 3D printed concrete wall column frame structure of the previous layer, repeat the above steps to perform the construction work.

[0025] By adopting the above technical scheme, the following technical effects can be achieved:

[0026] The 3D printed concrete wall column frame structure uses 3D printed concrete, steel and cast-in-place concrete as the main material; the wall cavity structure is printed by a 3D concrete printer, which can reduce the material consumption, facilitate the laying of water and electricity pipelines and the filling of thermal insulation materials, and further improve the strength of the wall by the triangular bone-like wall cavity structure.

[0027] The layer-by-layer printing and transverse steel laying work can enhance the connection between the wall and the structure column and prevent brittle failure of the printed wall.

[0028] The connecting piece and the steel connecting sleeve are used for connecting the two vertical steels located in the base part and the column, respectively, which can effectively increase the tensile performance of the steel at the interlayer connecting piece and transfer the load. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of a 3D printed concrete wall column frame structure according to an embodiment of the application;

[0030] Figure 2 is Figure 1 a schematic diagram of the first layer structure and the steel placement;

[0031] Figure 3 is Figure 1 a schematic diagram of the overall steel structure;

[0032] Figure 4 is Figure 2 a schematic diagram of the steel arrangement structure;

[0033] Figure 5 is a schematic diagram of the assembly structure of the first connecting mechanism of a 3D printed concrete wall column frame structure according to an embodiment of the application;

[0034] Figure 6 is a schematic diagram of a 3D printing concrete wall column frame structure with upper and lower layers of an embodiment of the present application;

[0035] Figure 7 is a structural schematic diagram of an embodiment of the present application in which one first column connects three first walls;

[0036] Figure 8 is a structural schematic diagram of an embodiment of the present application in which one first column connects two first walls;

[0037] Figure 9 is a structural schematic diagram of an embodiment of the present application in which multiple first columns connect multiple first walls;

[0038] Icon: first wall 1, first filling path 3, connecting piece 4, sleeve 5, concrete 6, sub-cavity 7, second wall 11, second column 12, first column 13, second filling path 15, second connecting mechanism 17, first transverse steel bar 21, second transverse steel bar 22, column hoop 23, second longitudinal steel bar 33, first longitudinal steel bar 32, third longitudinal steel bar 31. DETAILED DESCRIPTION

[0039] Embodiment

[0040] In combination Figures 1 to 6 As shown, the embodiment provides a 3D printing concrete wall column frame structure, comprising a structure body printed by 3D printing, which includes a first column 13 and four hollow first walls 1 connected with the first column 13;

[0041] The first column 13 is provided with four first cavities; the first wall 1 is provided with a first filling path 3 to form multiple second cavities, and a second cavity near the first column 13 is in communication with the first cavity to form a connecting cavity; the structure body is printed layer by layer at a set height, and on each layer, a first transverse steel bar 21 adapted to the first wall 1, a second transverse steel bar 22 welded to the first transverse steel bar 21 and adapted to the first cavity, and a column hoop 23 welded to the second transverse steel bar 22 and adapted to the first column 13 are placed;

[0042] In the first cavity, a first longitudinal steel bar 32 is also provided, one end of which is connected with the steel bar of the foundation part and the other end of which is placed at the bottom of the first cavity; and a second longitudinal steel bar 33 is connected to the column hoop 23, one end of which is placed in the first cavity and the other end of which extends to the outside of the structure body;

[0043] After the structure body is printed and formed, concrete 6 is poured in the connecting cavity.

[0044] The first wall 1 and the first column 13 are first 3D printed layer by layer, and the first transverse steel bars 21, the second transverse steel bars 22, and the column stirrups 23 are laid and connected. This serves to strengthen the connection between the wall and the column and prevent brittle failure of the printed wall. Then, concrete 6 is poured into the connecting cavity to further strengthen the connection between the wall and the column and also enhance the load-bearing capacity of the column. The second cavity in the first wall 1 reduces material usage and facilitates the laying of water and electricity pipelines and the filling of thermal insulation materials.

[0045] It should be noted that the foundation can be a pre-cast foundation on the ground or the underlying 3D-printed concrete wall and column frame structure.

[0046] The above-mentioned horizontal reinforcement work is carried out when printing to a specific printing layer, which serves to both strengthen the connection with the structural columns and prevent brittle failure of the printed wall.

[0047] In this embodiment, as Figure 1 As shown, a second filling path 15 is also provided within the second cavity to form multiple sub-cavities 7, and the sub-cavities 7 are triangular. The triangular skeleton-like wall cavity structure can further improve the strength of the wall.

[0048] Furthermore, such as Figures 3 to 5 As shown, this embodiment also includes a first connecting mechanism placed within the first cavity. Specifically, the connecting mechanism includes a hollow connector 4 with upper and lower end plates, and an opening is provided on the side wall of the connector 4; a sleeve 5 is provided inside the connector 4; the lower end of the first longitudinal reinforcement 32 passes through the upper end plate of the connector 4 and is screwed to the upper end of the sleeve 5, and the other end extends into the first cavity; the upper end of the third longitudinal reinforcement 31 placed in the foundation passes through the lower end plate of the connector 4 and is screwed to the lower end of the sleeve 5. Through the provision of the first connecting mechanism, the first longitudinal reinforcement 32 and the third longitudinal reinforcement 31 can be conveniently and quickly connected, ensuring the stability of the connection; at the same time, the first connecting mechanism can effectively increase the tensile strength of the reinforcement and transfer the load at the interlayer connection, thereby ensuring the stability of the connection between the concrete wall-column frame structure and the foundation.

[0049] Of course, such as Figure 6 As shown, the 3D-printed concrete wall and column frame structure with two or more layers can be further connected to the lower layer of the 3D-printed concrete wall and column frame structure via a second connecting mechanism 17; at this time, the upper end of the second longitudinal reinforcement 33 is connected to the sleeve 5 of the second connecting mechanism 17. The upper layer of the 3D-printed concrete wall and column frame structure is formed by sequentially printing the second wall 11 and the second column 12 on the first wall 1 and the first column 13.

[0050] The application also provides a construction method of the 3D printing concrete 6 wall column frame structure, comprising the following steps:

[0051] First step: printing the structure by layering upward, first printing the first column body 13 and the first layer of the first wall body 1 at a set height;

[0052] Second step: placing the steel bars on the first layer structure; first, the first horizontal steel bar 21 and the second horizontal steel bar 22 are connected by welding, and then they are placed on the first layer 3D printed structure; the column hoop 23 is placed on the first layer structure column and welded with the second horizontal steel bar 22;

[0053] Third step: installing the connecting mechanism; first, the connecting sleeve 5 is placed in the connecting piece 4, and is screwed with the third longitudinal steel bar 31 of the base part and the first longitudinal steel bar located in the first cavity;

[0054] Fourth step: continue to print the structure at the next layer set height, and lay the horizontal steel bars and column hoops 23; until the 3D printing of the whole structure is completed; then the second longitudinal steel bar is inserted into the first cavity and is tied and fixed on the column hoop 23;

[0055] Fifth step: pouring the concrete 6 in the connecting cavity.

[0056] The construction method can flexibly set the wall column structures of the edge, corner and interior according to the requirements of building design, and if there is a 3D printing concrete wall column frame structure of the previous layer, the above steps are repeated to carry out the construction work.

[0057] Compared with the traditional 3D printing concrete post-implantation steel cage construction method, the above 3D printing concrete wall column frame structure not only can form a reliable wall column frame connecting structure, but also can improve the convenience of construction.

[0058] In other embodiments, as shown in Figures 7 to 9 It can also be one first column body 13 connected with two or three first wall bodies 1, or even a plurality of first column bodies 13 connected with a plurality of first wall bodies 1. The construction method is the same as the embodiment, which will not be described in detail here.

[0059] It should be understood that: the above is only the preferred embodiment of the application, the protection scope of the application is not limited to the above-mentioned embodiments, and any technical solution belonging to the idea of the application belongs to the protection scope of the application.

[0060] The above introduction to the drawings used in the embodiments only shows some of the embodiments of the present application and should not be considered as limiting the scope. Other related drawings can also be obtained from the drawings without creative labor for those skilled in the art.

Claims

1. A 3D-printed concrete wall-column frame structure, comprising a 3D-printed structure, which comprises at least one first column (13) and at least one hollow first wall (1) connected to the first column (13); characterized in that, the first column (13) is provided with a first cavity corresponding to the number of the first wall (1); the first wall (1) is provided with a first filling path (3) to form a plurality of second cavities, and a second cavity near the first column (13) is in communication with the first cavity to form a connecting cavity; the structure is printed layer by layer at a set height, and on each layer, a first transverse steel bar (21) corresponding to the first wall (1) is placed, a second transverse steel bar (22) corresponding to the first transverse steel bar (21) and the first cavity is connected, and a column hoop (23) corresponding to the second transverse steel bar (22) and the first column (13) is connected; at least one first longitudinal steel bar (32) is arranged in the first cavity, one end of which is connected to the steel bar of the foundation part and the other end is arranged at the bottom of the first cavity; and at least one second longitudinal steel bar (33) is arranged on the column hoop (23), one end of which is arranged in the first cavity and the other end extends out of the structure; after the structure is formed by printing, concrete (6) is poured into the connecting cavity; the second cavity is further provided with a second filling path (15) to form a plurality of triangular sub-cavities (7); the first transverse steel bar (21), the second transverse steel bar (22), and the column hoop (23) are connected by welding; the second longitudinal steel bar (33) is arranged at the center of the first cavity; a first connecting mechanism arranged in the first cavity is further included, which comprises a hollow connecting piece (4) with upper and lower end plates, and an opening is arranged on the side wall of the connecting piece (4); a sleeve (5) is arranged in the connecting piece (4); the lower end of the first longitudinal steel bar (32) is connected to the upper end of the sleeve (5) by penetrating the upper end plate of the connecting piece (4), and the other end extends into the first cavity; the upper end of the third longitudinal steel bar (31) arranged in the foundation part is connected to the lower end of the sleeve (5) by penetrating the lower end plate of the connecting piece (4); a second connecting structure is further included, which is used for connecting the 3D-printed concrete wall-column frame structure arranged on the upper layer; the upper end of the second longitudinal steel bar (33) is connected to the sleeve (5) of the second connecting structure; the first longitudinal steel bar (32) and the third longitudinal steel bar (31) are connected to the sleeve (5) by threading. The steps include:

2. A construction method of a 3D printed concrete wall column frame structure according to claim 1, characterized in that, Step 1: print the structure layer by layer from bottom to top, first print the first layer of the first column (13) and the first wall (1) at a set height; ​ Second step: placing the steel bars on the first layer structure; first, the first transverse steel bar (21) and the second transverse steel bar (22) are connected by welding and then placed on the first layer 3D printed structure; the column hoop (23) is placed on the first layer structure column and welded with the second transverse steel bar (22); Third step: installing the connecting mechanism; first, the sleeve (5) is placed inside the connecting piece (4) and connected with the third longitudinal bar (31) of the base part and the first longitudinal bar (32) located in the first cavity; Fourth step: continue to print the structure of the next layer with the set height and lay the transverse steel bars and column hoops (23); until the 3D printing of the entire structure is completed; then the second longitudinal bar (33) is inserted into the first cavity and tied and fixed on the column hoop (23); Fifth step: pouring the concrete (6) in the connecting cavity; If there is a 3D printed concrete wall column frame structure of the previous layer, repeat the above steps to perform the construction work.

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