3D printing concrete wall column frame structure and construction method

Abstract

The invention provides a 3D printing concrete wall column frame structure and a construction method. The frame structure comprises a 3D printing first column body and a 3D printing first wall body; a first cavity is formed in the first column body; a plurality of second cavities are formed in the first wall body, and the second cavity close to the first column body communicates with the first cavity to form a connecting cavity; the structural body is printed layer by layer at a set height, and steel bars and column stirrups are placed on each layer; one end of the first longitudinal bar is connected with a steel bar of the foundation part, and the other end of the first longitudinal bar is arranged at the bottom of the first cavity; the second longitudinal bar is connected to the column stirrup, one end of the second longitudinal bar is arranged in the first cavity, and the other end of the second longitudinal bar extends out of the structural body; and after the structural body is printed and formed, concrete pouring is conducted in the connecting cavity. Compared with a traditional construction method for post-implantation of a reinforcement cage through 3D printing of concrete, the 3D printing concrete wall column frame structure not only can form a reliable wall column frame connecting structure, but also can improve the construction convenience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building structure, in particular 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 building structures. Its cost is basically decoupled from 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-storey building, the integration of the printed structure still has difficulties. For example, how to ensure the effective transmission of load at the wall column joint and the interlayer connection, which 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-storey 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: The present application provides a 3D printed concrete wall column frame structure, comprising 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; 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 transverse steel bar and the first cavity, and a column hoop steel bar matched with the second transverse steel bar and the first column body are placed; At least one first longitudinal steel bar having one end connected with the steel bars of the foundation part and the other end placed at the bottom of the first cavity is also arranged in the first cavity; and at least one second longitudinal steel bar having one end placed in the first cavity and the other end extending to the outside of the structure body is connected to the column hoop steel bar; After the structure is printed and formed, the concrete is poured in the connecting cavity.

[0007] Further, the second cavity is provided with a second filling path to form a plurality of sub-cavities.

[0008] Further, the sub-cavities are triangular.

[0009] Further, the first transverse steel bar, the second transverse steel bar and the column hoop are connected by welding.

[0010] Further, the second longitudinal steel bar is arranged at the center of the first cavity.

[0011] 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 steel bar is connected to the upper end of the sleeve by penetrating the upper end plate of the connecting piece, and the other end is arranged in the first cavity; the upper end of the third longitudinal steel bar arranged in the base part is connected to the lower end of the sleeve by penetrating the lower end plate of the connecting piece.

[0012] 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 steel bar is connected to the sleeve of the second connecting structure.

[0013] Further, the first longitudinal steel bar and the third longitudinal steel bar are connected to the sleeve by threads.

[0014] The application also provides a construction method of the 3D printed concrete wall column frame structure, comprising the following steps: 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; Second step: placing the steel bars on the first layer structure; first, the first transverse steel bar and the second transverse steel bar are connected by welding, and then they are placed on the first layer of 3D printed structure; the column hoop is placed on the first layer of structural column and welded with the second transverse steel bar; Third step: installing the connecting mechanism; first, the connecting sleeve is placed in the connecting piece, and connected with the third longitudinal steel bar of the base part and the first longitudinal steel bar arranged in the first cavity; Fourth step: continuing to print the structure at the set height of the next layer, and laying the transverse steel bar and the column hoop; until the 3D printing of the whole structure is completed; then the second longitudinal steel bar is inserted into the first cavity and fixed on the column hoop by binding; Fifth step: pouring the concrete in the connecting cavity; If the 3D printed concrete wall column frame structure of the upper layer exists, the above steps are repeated to carry out the construction operation.

[0015] By adopting the technical scheme, the application can achieve the following technical effects: The 3D printed concrete wall column frame structure uses 3D printed concrete, steel bars and cast-in-place concrete as main materials; the wall cavity structure is printed by a 3D concrete printer, which can reduce the material usage, facilitate water and electricity pipeline laying and filling of thermal insulation materials, and further improve the strength of the wall by the triangular bone-like wall cavity structure.

[0016] The layer-by-layer printing and transverse steel bar laying operation can enhance the connection between the wall and the structural column and prevent brittle failure of the printed wall.

[0017] The connecting piece and the steel bar connecting sleeve are used for connecting the two vertical steel bars arranged in the base part and the column, which can effectively increase the tensile performance of the steel bar at the interlayer connecting piece and transfer the load. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of a 3D printed concrete wall column frame structure according to an embodiment of the application; Figure 2 is Figure 1 a schematic diagram of the structure of the first layer structure and the arrangement of the steel bars; Figure 3 is Figure 1 a schematic diagram of the overall steel bar structure; Figure 4 is Figure 2 a schematic diagram of the arrangement of the steel bars; Figure 5 is a schematic diagram of the assembly structure of a first connecting mechanism of a 3D printed concrete wall column frame structure according to an embodiment of the application; Figure 6 is a schematic diagram of a 3D printed concrete wall column frame structure according to an embodiment of the application, which has two upper and lower layers; Figure 7 is a schematic diagram of a structure in which one first column body connects three first walls according to an embodiment of the application; Figure 8 is a schematic diagram of a structure in which one first column body connects two first walls according to an embodiment of the application; Figure 9 is a schematic diagram of a structure in which a plurality of first column bodies connect a plurality of first walls according to an embodiment of the application; 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

[0019] EMBODIMENT COMBINATION Figures 1 to 6 As shown, the embodiment provides a 3D-printed concrete wall-column frame structure, comprising a structure body printed by 3D printing, which comprises a first column 13 and four hollow first walls 1 connected with the first column 13; The first column 13 is provided with four first cavities; the first wall 1 is provided with a first filling path 3 to form a plurality of second cavities, and a second cavity close to 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; The first cavity is further provided with a first longitudinal steel bar 32 having one end connected with a steel bar of a foundation part and the other end placed at the bottom of the first cavity, and a second longitudinal steel bar 33 connected with the column hoop 23 and having one end placed in the first cavity and the other end extending out of the structure body; After the structure body is printed and formed, concrete 6 is poured in the connecting cavity.

[0020] The first wall 1 and the first column 13 are partially printed layer by layer by 3D printing and laid with the first transverse steel bar 21, the second transverse steel bar 22 and the column hoop 23, which have the effects of enhancing the connection between the wall and the column and preventing brittle failure of the printed wall. Pouring concrete 6 in the connecting cavity further strengthens the connection between the wall and the column and enhances the load bearing capacity of the column. The second cavities in the first wall 1 can reduce the amount of materials and facilitate the laying of water and electricity pipelines and the filling of thermal insulation materials.

[0021] It should be noted that the foundation part can be a foundation pre-poured on the ground or a bottom layer of the 3D-printed concrete wall-column frame structure.

[0022] When printing to a specific printing layer to lay the transverse steel bars, the first wall 1 and the first column 13 have the effects of enhancing the connection with the structural column and preventing brittle failure of the printed wall In the embodiment, as shown in Figure 1 The second cavity is also provided with a second filling path 15 to form a plurality of sub-cavities 7, and the sub-cavities 7 are triangular. The wall cavity structure like a triangular skeleton can further improve the strength of the wall.

[0023] Further, as shown in Figures 3 to 5 In the embodiment, a first connecting mechanism is also arranged in the first cavity. Specifically, the connecting mechanism includes a hollow connecting piece 4 with upper and lower end plates, and the side wall of the connecting piece 4 is provided with an opening; a sleeve 5 is arranged in the connecting piece 4; the lower end of the first longitudinal steel 32 is screwed to the upper end of the sleeve 5 through 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 31 arranged in the base part is screwed to the lower end of the sleeve 5 through the lower end plate of the connecting piece 4. Through the arrangement of the first connecting mechanism, the first longitudinal steel 32 and the third longitudinal steel 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 performance of the steel at the interlayer connection and transfer the load, thereby ensuring the stable connection of the concrete wall column frame structure and the base part.

[0024] Of course, as shown in Figure 6 The 3D printed concrete wall column frame structure with two or more layers can be further connected through a second connecting mechanism 17 on the lower layer of the 3D printed concrete 6 wall column frame structure; at this time, the upper end of the second longitudinal steel 33 is connected with the sleeve 5 of the second connecting mechanism 17. The 3D printed concrete wall column frame structure of the upper layer is sequentially printed with a second wall 11 and a second column 12 on the first wall 1 and the first column 13 layer by layer.

[0025] The application also provides a construction method of the 3D printed concrete 6 wall column frame structure, which includes the following steps: First step: printing the structure layer by layer from bottom to top, first printing the first layer of the first column 13 and the first wall 1 at a set height; Second step: placing the steel on the first layer structure; first, the first horizontal steel 21 and the second horizontal steel 22 are connected by welding, and then they are placed on the first layer of the 3D printed structure; the column hoop steel 23 is placed on the first layer of the structure column and welded with the second horizontal steel 22; 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 31 of the base part and the first longitudinal steel in the first cavity; Fourth step: continue to print the next layer of the structure with the set height, and lay the transverse steel bars and column hoops 23; until the 3D printing of the whole structure is completed; then insert the second longitudinal steel bars into the first cavity and bind and fix them on the column hoops 23; Fifth step: pour the concrete 6 in the connecting cavity.

[0026] The construction method can flexibly set the wall column structures of the edge part, corner part and inner part according to the requirements of the architectural design, and if there is a 3D printed concrete wall column frame structure of the previous layer, the above steps are repeated to perform the construction operation.

[0027] Compared with the traditional 3D printed concrete post-implantation steel cage construction method, the above 3D printed concrete wall column frame structure can not only form a reliable wall column frame connecting structure, but also improve the convenience of construction.

[0028] In other embodiments, as shown in Figures 7 to 9 It can also be that one first column 13 is connected with two or three first walls 1, or even that multiple first columns 13 are connected with multiple first walls 1. The construction method is the same as in the present embodiment, and thus will not be described in detail here.

[0029] It should be understood that the above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above embodiments. Any technical solution falling within the concept of the present application is within the protection scope of the present application.

[0030] The above introduction of the drawings used in the embodiments only shows some embodiments of the present application, and should not be considered as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained from the drawings without creative labor.

Claims

1. A 3D-printed concrete wall-column frame structure, comprising a 3D-printed structure including 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 that matches 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 connected to the first cavity to form a connecting cavity; the structure is printed layer by layer at a set height, and a first transverse steel bar (21) that matches the first wall (1) is placed on each layer, a second transverse steel bar (22) that matches the first cavity is connected to the first transverse steel bar (21), and a column stirrup (23) that matches the second transverse steel bar (22) and the first column (13) is connected to the first transverse steel bar (22); The first cavity is also provided with at least one first longitudinal bar (32) with one end connected to the steel bar of the foundation and the other end placed at the bottom of the first cavity; and at least one second longitudinal bar (33) connected to the column stirrup (23) with one end placed in the first cavity and the other extending out of the structure body. After the structure is printed, concrete (6) is poured into the connecting cavity.

2. The 3D-printed concrete wall-column frame structure according to claim 1, characterized in that, The second cavity is further provided with a second filling path (15) to form multiple sub-cavities (7).

3. The 3D-printed concrete wall-column frame structure according to claim 2, characterized in that, The sub-cavity (7) is triangular.

4. The 3D-printed concrete wall-column frame structure according to claim 1, characterized in that, The first transverse steel bar (21), the second transverse steel bar (22), and the column stirrup (23) are connected by welding.

5. The 3D-printed concrete wall-column frame structure according to claim 1, characterized in that, The second longitudinal rib (33) is placed at the center of the first cavity.

6. The 3D-printed concrete wall-column frame structure according to any one of claims 1-5, characterized in that, It also includes a first connecting mechanism placed in the first cavity, which 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 rib (32) passes through the upper end plate of the connector (4) and is connected to the upper end of the sleeve (5), and the other end extends into the first cavity; the upper end of the third longitudinal rib (31) placed in the base passes through the lower end plate of the connector (4) and is connected to the lower end of the sleeve (5).

7. The 3D-printed concrete wall-column frame structure according to claim 6, characterized in that, It also includes a second connecting structure for connecting the 3D printed concrete wall column frame structure placed on the upper layer; the upper end of the second longitudinal bar (33) is connected to the sleeve (5) of the second connecting structure.

8. The 3D-printed concrete wall-column frame structure according to claim 6, characterized in that, The first longitudinal rib (32) and the third longitudinal rib (31) are connected to the sleeve (5) by threads.

9. A construction method for a 3D-printed concrete wall-column frame structure as described in any one of claims 6-8, characterized in that, Includes the following steps: Step 1: Print the structure by printing layer by layer upwards. First, print the first layer of the first column (13) and the first wall (1) at the set height. Step 2: Place the reinforcing bars on the first layer of the structure; First, connect the first transverse reinforcing bar (21) and the second transverse reinforcing bar (22) by welding, and then place them on the first layer of the 3D printed structure; Place the column stirrups (23) on the first layer of the structural column and weld them to the second transverse reinforcing bar (22); Step 3: Install the connecting mechanism; First, place the connecting sleeve (5) inside the connector (4) and connect it with the third longitudinal bar (31) of the foundation and the first longitudinal bar located in the first cavity; Step 4: Continue printing the structure of the next layer with a set height, and lay the horizontal steel bars and column stirrups (23); until the 3D printing of the entire structure is completed; then insert the second longitudinal steel bar into the first cavity and tie it to the column stirrups (23); Step 5: Pour concrete (6) into the connecting cavity; If there is a 3D-printed concrete wall and column frame structure on the upper level, repeat the above steps for construction.

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