Steel frame structure filling in-situ 3D printing reinforced wall body system and construction method thereof

Abstract

The invention provides a steel frame structure filling in-situ 3D printing reinforced wall body system. The steel frame structure filling in-situ 3D printing reinforced wall body system comprises a steel frame main body structure and an in-situ 3D printing filling wall body; the steel frame main body structure comprises steel columns, steel beams and steel truss floor support plates; the in-situ 3D printing filling wall body comprises wall body lines, reinforcing ribs, horizontal steel bars and cast-in-situ core columns. The wall body lines form the peripheral structure of the in-situ 3D printing filling wall body, the horizontal steel bars are arranged in the wall body lines, and the reinforcing ribs are arranged between the two wall body lines on the two corresponding sides of the in-situ 3D printing filling wall body. The wall body lines and the reinforcing ribs are formed through 3D printing; the end part of the in-situ 3D printing filling wall body is connected with the steel frame main body structure through a post-cast column, and a ring beam is arranged at the top of the in-situ 3D printing filling wall body; the advantages of good integrity, small transportation and hoisting amount and few abutted seams of an in-situ 3D printing structure and the advantages of large use space and low wall bearing requirement of a frame infilled wall structure are fused.

Description

Technical Field

[0001] The present invention belongs to the field of 3D printing building technology, and specifically relates to a steel frame structure filled with in-situ 3D printed reinforced wall system and a construction method thereof. Background Art

[0002] 3D printing, also known as additive manufacturing, is an automated construction technology that uses digital models to build three-dimensional structures by layering materials. Amidst the current wave of innovation in the architectural field, 3D printing stands out with its significant advantages, becoming a significant force driving industry change. 3D printing boasts unparalleled efficiency. Compared to traditional construction methods, it can reduce construction time by 30% to 60%, significantly shortening the construction cycle. Furthermore, thanks to its automated construction process, 3D printing can effectively reduce labor costs by over 50%. Furthermore, 3D printing offers greater precision in material usage, significantly reducing material waste. 3D printing enables the precise construction of complex geometries, from beautiful curved surfaces to intricate hollow structures. This technology transcends the limitations of traditional construction techniques and provides architects with greater creative freedom. 3D printing can utilize up to 60% recycled materials, transforming steel slag and construction waste into building materials. This reduces the extraction of new resources and the environmental impact of construction waste, aligning with global sustainable development goals.

[0003] Currently, architectural 3D printing is generally divided into two methods. One is modular printing and then assembly, which refers to the use of 3D printers to produce independent units, and the interior of the modules is decorated and arranged in the factory. They are then transported to the site and connected to form a whole building through hoisting. This method is often used for masonry structures and frame-filled wall structures. Its disadvantage is that the resulting structural integrity is poor, and additional transportation and hoisting costs are required. The joints between prefabricated modules are complicated and affect the appearance. The other is called in-situ printing, which is directly constructed on site with a 3D printer. First, a large-scale architectural 3D printer is installed on the vacant land of the house to be built. Then, according to the 3D design drawings of the house, the building materials are extruded layer by layer for superposition and molding. At the same time, other building materials can be installed, and finally the entire house is printed. This method is often used for masonry structures. Its disadvantage is that the 3D printed wall has low load-bearing reliability and the internal usable space of the building is limited. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a steel frame structure filled in-situ 3D printed reinforced wall system and its construction method, which combines the advantages of good integrity, small transportation and hoisting volume, and few joints of the in-situ 3D printed structure with the advantages of large space usage and low wall load requirements of the frame-filled wall structure.

[0005] The technical solution of the present invention is: a steel frame structure filled with an in-situ 3D printed reinforced wall system, comprising:

[0006] Steel frame main structure and in-situ 3D printed infill walls;

[0007] The steel frame main structure includes steel columns, steel beams and steel truss floor decks;

[0008] The in-situ 3D printed infill wall includes wall lines, reinforcing ribs, horizontal steel bars and cast-in-place core columns;

[0009] The wall lines constitute the peripheral structure of the in-situ 3D printed infill wall, the horizontal steel bars are arranged inside the wall lines, and the reinforcing ribs are arranged between two wall lines on two corresponding sides of the in-situ 3D printed infill wall;

[0010] The wall lines and reinforcement ribs are formed by 3D printing;

[0011] The ends of the in-situ 3D printed filling wall are connected to the steel frame main structure through post-cast columns, and a ring beam is provided on the top of the in-situ 3D printed filling wall.

[0012] Furthermore, the steel frame structure is filled with an in-situ 3D printed reinforced wall system, further comprising:

[0013] Independent foundation and tension beam;

[0014] The independent foundation is used to bear the load of the steel frame main structure;

[0015] The tension beam is used to bear the load of the in-situ 3D printed filling wall.

[0016] Furthermore, at least one vertical dowel bar is provided inside the cast-in-place core column, the bottom end of the vertical dowel bar is anchored into the tension beam, and the top end of the vertical dowel bar is anchored into the ring beam.

[0017] Furthermore, the cast-in-situ core column in the in-situ 3D printed filling wall is set at the following position:

[0018] Areas without steel columns at the ends of the wall;

[0019] Corner and T-joint nodes;

[0020] Preset nodes on both sides of the opening;

[0021] The four corners of stairwells and elevator rooms;

[0022] The upper and lower ends of the stair treads correspond to the walls; and

[0023] The middle area of ​​the wall that is longer than 5m or twice the floor height.

[0024] Furthermore, the printed thickness of the wall line is less than or equal to 2 / 3 of the printed width of the wall line; the printed width of the wall line is ≥20 mm.

[0025] The construction method of the steel frame structure filled with an in-situ 3D printed reinforced wall system includes the following steps:

[0026] S1, using 3D modeling software to construct a digital model of the steel frame structure filled with in-situ 3D printed reinforced wall system, and simultaneously complete the spatial layout design of the building, mechanical and electrical equipment, and pipelines;

[0027] S2: Use finite element analysis software to perform structural design on the digital model, and use plug-in tools to perform special analysis on the cantilevered structural parts of the in-situ 3D printed infill wall. If the analysis results do not meet the preset threshold, feedback is provided to S1 to adjust the model parameters until the structural safety verification is passed;

[0028] S3, select 3D printing equipment and process based on the architectural and structural design results, and simultaneously design the 3D printing mortar mix ratio;

[0029] S4, perform in-situ 3D printing to fill the wall slices, confirm the printing path, and complete the printing test;

[0030] S5: Complete the hardening of the building foundation and the road surface in the 3D printing equipment operation area;

[0031] S6: Lay out, position, and install the 3D printing equipment, start layered printing of the infill wall, and tie the cast-in-place core column reinforcement.

[0032] S7: Printing is suspended at the cast-in-place component to carry out the cast-in-place component formwork laying, top steel pipe restoration, steel bar tying, concrete pouring, and curing.

[0033] S8: Hoist steel columns, steel beams and steel truss floor decks to complete the installation of the main steel frame structure;

[0034] S9, perform post-cast column reinforcement binding and pouring and curing between the in-situ 3D printed infill wall and the steel frame main structure;

[0035] S10, remove the formwork, apply waterproofing agent, and complete the construction.

[0036] Furthermore, the S1 further includes the following steps:

[0037] After completing the spatial layout design of the building, mechanical and electrical equipment, and pipelines, the positions of the cast-in-place components are vacated in the 3D-printed infill wall through Boolean operations to obtain the difference set according to the positions of the lintels, horizontal tie beams, ring beams, window sill beams, and mechanical and electrical pipelines.

[0038] Furthermore, the step S6 further includes the following steps:

[0039] S61: After extruding the wall lines and reinforcing ribs to a certain number of layers, horizontal steel bars are laid within the wall lines and vertical dowel bars of the cast-in-place core columns are tied;

[0040] S62: Additional tie bars shall be laid every 600mm inside the wall line. The additional tie bars shall be anchored into the post-cast column for a length of not less than 200mm and anchored into the wall line for a length of not less than 500mm.

[0041] S63, after printing to a certain height, pour the cast-in-place core column concrete to avoid excessive mold expansion force caused by pouring at a high printing height.

[0042] Furthermore, the step S7 further includes the following steps:

[0043] S71, stop the 3D printing equipment at the elevation of the top of the window sill beam, lay steel mesh within a length of 250 mm on both sides of the door and window openings and at the elevation of the bottom of the window sill beam to serve as the bottom formwork of the window sill beam, use the 3D printed wall as the side formwork of the window sill beam, pour the printing mortar and perform curing, and continue printing the wall after reaching the design strength;

[0044] S72: Stop the 3D printing equipment when printing reaches the top elevation of the lintel and horizontal tie beam. Lay a 3D printed plastic formwork directly below the door and window openings. Lay a steel mesh along the axis of the 3D printed wall to serve as the bottom formwork for the lintel and horizontal tie beams. Use the 3D printed wall as the side formwork for the lintel and horizontal tie beams. Replace the steel pipes at the wooden formwork directly below the door and window openings. Pour the printed mortar and perform curing. Continue printing the wall after reaching the design strength.

[0045] S73: Stop the 3D printing equipment when printing reaches the top elevation of the ring beam. Lay a steel mesh along the axis of the 3D printed wall as the bottom formwork of the ring beam. Use the 3D printed wall as the side formwork of the ring beam. Pour the printing mortar and perform curing. Complete the infill wall construction after reaching the designed strength.

[0046] Furthermore, the step S9 further includes the following steps:

[0047] S91, after the main steel frame structure is hoisted into place, tie the post-cast column reinforcement and additional stirrups;

[0048] S92, welding of additional stirrups for post-cast columns to steel columns;

[0049] S93, support the post-cast column formwork and pour the printing mortar. The formwork near the steel column side uses extruded board, and the extruded board is opened according to the location of the additional stirrups;

[0050] S94: Angle steel connectors are used to connect the ring beam and the steel truss floor deck at intervals of 1200mm, and flexible connecting materials are filled in the gap between the ring beam and the floor deck.

[0051] Beneficial effects of the present invention:

[0052] (1) The steel frame structure filled with in-situ 3D printed reinforced wall system of the present invention adopts a steel frame main structure filled with in-situ 3D printed filling walls to avoid the problem of reduced bearing reliability of 3D printed masonry structures, while providing a larger space for indoor use, better meeting the needs of modern life;

[0053] (2) By first printing the in-situ 3D printing filling wall and then installing the steel frame main structure, it not only provides a relatively open working space for the 3D printing equipment, but also does not affect the quality and efficiency of the steel structure installation;

[0054] (3) The connection nodes between the in-situ 3D printed filling wall and the steel frame main structure provide reliable boundary conditions for the in-situ 3D printed filling wall, while avoiding the influence of the in-situ 3D printed filling wall on the deformation of the main structure, making the structural system more integrated and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 This is a structural diagram of the steel frame structure filled with in-situ 3D printed reinforced wall system in the present invention.

[0056] Figure 2 Schematic diagram of the structure of the in-situ 3D printed filling wall in the present invention.

[0057] Figure 3 This is the layout diagram of the cast-in-place structure of the door opening in the present invention.

[0058] Figure 4 This is a layout diagram of the cast-in-place structure of the window opening in the present invention.

[0059] Figure 5 Schematic diagram of the connection node between the in-situ 3D printed reinforced wall and the steel column in the present invention.

[0060] Figure 6 Schematic diagram of the connection node between the in-situ 3D printed reinforced wall and the steel truss floor deck in the present invention.

[0061] Figure 7 It is a schematic diagram of the connection node between the steel column and the post-cast column in the present invention.

[0062] Figure 8 This is a flow chart of the construction method of the steel frame structure filled with an in-situ 3D printed reinforced wall system in the present invention. DETAILED DESCRIPTION

[0063] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present invention, its application, or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully convey the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0064] The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are simply used to distinguish different parts. Terms such as "include" or "comprising" mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0065] like Figures 1 to 7 As shown, a steel frame structure infilled in-situ 3D printed reinforced wall system is disclosed, comprising: a steel frame main structure 2 and an in-situ 3D printed infill wall 1; the steel frame main structure 2 comprises steel columns 21, steel beams 22 and steel truss floor decks 23; the in-situ 3D printed infill wall 1 comprises wall lines 11, reinforcing ribs 12, horizontal steel bars 13 and cast-in-place core columns 14; the wall lines 11 constitute the outer structure of the in-situ 3D printed infill wall 1, the horizontal steel bars 13 are arranged inside the wall lines 11, and the reinforcing ribs 12 are arranged between the two wall lines 11 on the corresponding sides of the in-situ 3D printed infill wall 1; the wall lines 11 and the reinforcing ribs 12 are formed by 3D printing; the end of the in-situ 3D printed infill wall 1 is connected to the steel frame main structure 2 through a post-cast column 3, and a ring beam 4 is provided at the top of the in-situ 3D printed infill wall 1.

[0066] In the above embodiment, the steel frame structure is filled with the in-situ 3D printed reinforced wall system, and the steel frame main structure 2 is filled with the in-situ 3D printed filling wall 1, which avoids the problem of reduced bearing reliability of the 3D printed masonry structure, and at the same time provides a larger space for indoor use, which better meets the needs of modern life; by first in-situ printing the in-situ 3D printed filling wall 1 and then installing the steel frame main structure 2, it not only provides a relatively open working space for the 3D printing equipment, but also does not affect the quality and efficiency of the steel structure installation; the connection node between the in-situ printed in-situ 3D printed filling wall 1 and the steel frame main structure 2 provides a reliable boundary condition for the in-situ 3D printed filling wall 1, and at the same time avoids the influence of the in-situ 3D printed filling wall 1 on the deformation of the main structure, making the structural system more integrated and safer.

[0067] In some embodiments, the steel frame structure is filled with an in-situ 3D printed reinforced wall system, further comprising: an independent foundation 6 and a tension beam 5; the independent foundation 6 is used to bear the load of the steel frame main structure 2; the tension beam 5 is used to bear the load of the in-situ 3D printed filling wall 1.

[0068] In some embodiments, the interior of the cast-in-place core column 14 is provided with no less than one vertical dowel bar 15, the bottom end of the vertical dowel bar 15 is anchored in the tension beam 5, and the top end of the vertical dowel bar 15 is anchored in the ring beam 4; specifically, the bottom end of the vertical dowel bar 15 of the cast-in-place core column 14 is anchored 500 mm into the tension beam 5, and the top end of the vertical dowel bar 15 is anchored 500 mm into the ring beam 4.

[0069] In some embodiments, the cast-in-place core columns 14 in the in-situ 3D printed filling wall 1 are arranged in the following positions: the area without steel columns at the end of the in-situ 3D printed filling wall 1; the corners and T-joint nodes of the in-situ 3D printed filling wall 1; the preset nodes on both sides of the opening of the in-situ 3D printed filling wall 1; the four corners of the stairwell and elevator room; the corresponding walls at the upper and lower ends of the inclined staircase; and the middle area of ​​the in-situ 3D printed filling wall 1 with a length exceeding 5m or twice the floor height.

[0070] In some embodiments, as a specific implementation of printing the wall line 11 , the printing thickness of the wall line 11 is less than or equal to 2 / 3 of the printing width of the wall line 11 ; the printing width of the wall line 11 is ≥20 mm.

[0071] In some embodiments, a door opening 16 and / or a window opening 17 is provided on the in-situ 3D printed filling wall 1, a lintel 18 is provided on the upper part of the door opening 16 and the window opening 17, and a window sill beam 19 is provided on the lower part of the window opening 17; the length of the lintel 18 and the window sill beam 19 is 250 mm larger than the width of the door opening 16 and the window opening 17.

[0072] In the above embodiment, when the wall height of the in-situ 3D printed filling wall 1 is greater than 4m, a horizontal tie beam 7 should still be set. The bottom elevation of the horizontal tie beam 7 can be the same as the bottom elevation of the lintel 18, and the area and structure of the load-bearing bottom reinforcement of the horizontal tie beam 7 can be the same as the load-bearing bottom reinforcement of the lintel 18.

[0073] In the above embodiment, the cross section of the cast-in-situ core column 14 should not be less than 120 mm×120 mm, and the strength of the vertical dowel bars 15 should not be lower than HRB400.

[0074] In some embodiments, as Figure 6 As shown, in order to further ensure the thermal insulation and fireproof performance of the in-situ 3D printed filling wall 1, the interior of the in-situ 3D printed filling wall 1 is filled with foamed concrete 111.

[0075] In the above embodiments, as some optional implementations of the reinforcing rib 12, the reinforcing rib 12 is trapezoidal, triangular, or straight.

[0076] In some embodiments, the reserved steel bars 51 of the independent foundation 6 and the tension beam 5 are tied and connected with the steel bars of the cast-in-place core column 14 and the post-cast column 3 respectively.

[0077] In some embodiments, as Figure 8 As shown, a construction method for filling a steel frame structure with an in-situ 3D printed reinforced wall system is disclosed, comprising the following steps:

[0078] S1, using 3D modeling software such as Rhino, builds a digital model of the steel frame structure filled with in-situ 3D printed reinforced wall system, and simultaneously completes the spatial layout design of the building, mechanical and electrical equipment, and pipelines;

[0079] S2: Use finite element analysis software such as YJK to perform structural design on the digital model. Use the Ovenbird plug-in tool or other analysis software to perform special analysis on the cantilevered structure of the in-situ 3D printed infill wall 1. If the analysis results do not meet the preset threshold, feedback is provided to S1 to adjust the model parameters until the structural safety verification is passed.

[0080] S3, select 3D printing equipment and process based on the architectural and structural design results, and simultaneously design the 3D printing mortar mix ratio;

[0081] S4, perform in-situ 3D printing of the filling wall 1 slice, confirm the printing path, and complete the printing test;

[0082] S5: Complete the hardening of the building foundation and the road surface in the 3D printing equipment operation area;

[0083] S6: Lay out, position, and install the 3D printing equipment, start layered printing of the filling wall, and tie 14 steel bars of the cast-in-place core column at the same time;

[0084] S7: Printing is suspended for cast-in-place components such as lintel 18, horizontal tie beam 7, and ring beam 4, and formwork laying, top steel pipe restoration, reinforcement tying, concrete pouring, and curing are performed.

[0085] S8, hoisting steel columns 21, steel beams 22 and steel truss floor decks 23 to complete the installation of the steel frame main structure 2;

[0086] S9, performing in-situ 3D printing, tying and pouring of steel bars for post-cast columns 3 between the filling wall 1 and the steel frame main structure 2;

[0087] S10, remove the formwork, apply waterproofing agent, and complete the construction.

[0088] In some embodiments, S1 further includes the following steps:

[0089] After completing the spatial layout design for the building, mechanical and electrical systems, and pipelines, the locations of the cast-in-place components are cleared within the in-situ 3D-printed infill wall 1 using Boolean operations to calculate differences based on the locations of the lintel 18, horizontal tie beam 7, ring beam 4, window sill beam 19, and mechanical and electrical pipelines. Furthermore, space should be left between the in-situ 3D-printed infill wall 1 and the steel column 21, and between the in-situ 3D-printed infill wall 1 and the steel beam 22 for the installation of the steel column 21 and the steel beam 22, respectively.

[0090] In some embodiments, S6 further includes the following steps:

[0091] S61, after extruding the wall lines 11 and the reinforcing ribs 12 to a certain number of layers, such as 1 to 20 layers, horizontal steel bars 13 are laid in the wall lines 11, and vertical dowel bars 15 of the cast-in-place core columns 14 are tied;

[0092] S62: Additional tie bars 31 are laid every 600mm inside the wall line. The anchor length of the additional tie bars 31 in the post-cast column 3 should be no less than 200mm, and the anchor length in the wall line 11 should be no less than 500mm.

[0093] S63, after printing to a certain height, pour the cast-in-place core column 14 concrete to avoid excessive mold expansion force caused by pouring at a high printing height.

[0094] In some embodiments, S7 further includes the following steps:

[0095] S71, stop the 3D printing equipment at the top elevation of the window sill beam 19, lay steel mesh within a length of 250 mm on both sides of the door opening 16 and the window opening 17 and at the bottom elevation of the window sill beam 19 to serve as the bottom formwork of the window sill beam, use the 3D printed wall as the side formwork of the window sill beam 19, pour the printing mortar and perform curing, and continue printing the wall after reaching the design strength;

[0096] S72: Stop the 3D printing equipment at the top elevation of lintel 18 and horizontal tie beam 7. Lay a 3D printed plastic formwork directly below door opening 16 and window opening 17. Lay a steel mesh along the axis of the 3D printed wall to serve as the bottom formwork for lintel 18 and horizontal tie beam 7. Use the 3D printed wall as the side formwork for lintel 18 and horizontal tie beam 7. Replace the steel pipes in the wooden formwork directly below door opening 16 and window opening 17. Pour printed mortar and perform curing. Continue printing the wall after reaching the designed strength.

[0097] S73, stop the 3D printing equipment at the top elevation of the ring beam 4, lay a steel mesh along the axis of the 3D printed wall as the bottom formwork of the ring beam 4, use the 3D printed wall as the side formwork of the ring beam 4, pour the printing mortar and perform curing, and complete the infill wall construction after reaching the design strength.

[0098] In some embodiments, as Figure 7 As shown, S8 also includes the use of exposed steel column base 211 connected to the independent foundation 6.

[0099] In some embodiments, S9 further includes the following steps:

[0100] S91, after the main steel frame structure 2 is hoisted into place, the post-cast column 3 reinforcement and additional stirrups 32 are tied;

[0101] S92, welding the additional stirrups 32 of the post-cast column 3 to the steel column 21;

[0102] S93, support the post-cast column 3 formwork and pour the printed mortar. The formwork near the steel column 21 is made of extruded board, and the extruded board is opened according to the position of the additional stirrup 32;

[0103] S94, use angle steel connectors 231 to connect the ring beam 4 and the steel truss floor deck at intervals of 1200 mm, and fill the gap between the ring beam 4 and the floor deck 23 with flexible connecting material 232.

[0104] In the above embodiment, the flexible connection material 232 can be made of chloroprene rubber, prefabricated rubber caulking strips, polyvinyl chloride putty, polystyrene foam board, etc.

[0105] In the above embodiment, the post-cast columns 3 are reinforced concrete connecting columns cast at a later stage.

[0106] Thus far, various embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details well known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0107] The above-described embodiments represent only some embodiments of the present invention. Although the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims.

Claims

1. A steel frame structure filled with in-situ 3D printed reinforced wall system, characterized in that: include: Steel frame main structure and in-situ 3D printed infill walls; The steel frame main structure includes steel columns, steel beams and steel truss floor decks; The in-situ 3D printed infill wall includes wall lines, reinforcing ribs, horizontal steel bars and cast-in-place core columns; The wall lines constitute the peripheral structure of the in-situ 3D printed infill wall, the horizontal steel bars are arranged inside the wall lines, and the reinforcing ribs are arranged between two wall lines on two corresponding sides of the in-situ 3D printed infill wall; The wall lines and reinforcement ribs are formed by 3D printing; The ends of the in-situ 3D printed filling wall are connected to the steel frame main structure through post-cast columns, and a ring beam is provided on the top of the in-situ 3D printed filling wall.

2. The steel frame structure filled in-situ 3D printed reinforced wall system according to claim 1, characterized in that: Also includes: Independent foundation and tension beam; The independent foundation is used to bear the load of the steel frame main structure; The tension beam is used to bear the load of the in-situ 3D printed filling wall.

3. The steel frame structure filled in-situ 3D printed reinforced wall system according to claim 2, characterized in that: No less than one vertical dowel bar is provided inside the cast-in-place core column, the bottom end of the vertical dowel bar is anchored into the tension beam, and the top end of the vertical dowel bar is anchored into the ring beam.

4. The steel frame structure filled in-situ 3D printed reinforced wall system according to claim 1, characterized in that: The cast-in-place core columns in the in-situ 3D printed infill wall are arranged at the following positions: Areas without steel columns at the ends of the wall; Corner and T-joint nodes; Preset nodes on both sides of the opening; The four corners of stairwells and elevator rooms; The upper and lower ends of the stair treads correspond to the walls; and The middle area of ​​the wall that is longer than 5m or twice the floor height.

5. The steel frame structure filled in-situ 3D printed reinforced wall system according to claim 1, characterized in that: The printing thickness of the wall line is less than or equal to 2 / 3 of the printing width of the wall line; the printing width of the wall line is ≥20mm.

6. A construction method for filling a steel frame structure with an in-situ 3D printed reinforced wall system, characterized in that: The following steps are involved: S1, using 3D modeling software to construct a digital model of the steel frame structure filled with in-situ 3D printed reinforced wall system, and simultaneously complete the spatial layout design of the building, mechanical and electrical equipment, and pipelines; S2: Use finite element analysis software to perform structural design on the digital model, and use plug-in tools to perform special analysis on the cantilevered structural parts of the in-situ 3D printed infill wall. If the analysis results do not meet the preset threshold, feedback is provided to S1 to adjust the model parameters until the structural safety verification is passed; S3, select 3D printing equipment and process based on the architectural and structural design results, and simultaneously design the 3D printing mortar mix ratio; S4, perform in-situ 3D printing to fill the wall slices, confirm the printing path, and complete the printing test; S5: Complete the hardening of the building foundation and the road surface in the 3D printing equipment operation area; S6: Lay out, position, and install the 3D printing equipment, start layered printing of the infill wall, and tie the cast-in-place core column reinforcement. S7: Printing is suspended at the cast-in-place component to carry out the cast-in-place component formwork laying, top steel pipe restoration, steel bar tying, concrete pouring, and curing. S8: Hoist steel columns, steel beams and steel truss floor decks to complete the installation of the main steel frame structure; S9, perform post-cast column reinforcement binding and pouring and curing between the in-situ 3D printed infill wall and the steel frame main structure; S10, remove the formwork, apply waterproofing agent, and complete the construction.

7. The construction method of the steel frame structure filled with in-situ 3D printed reinforced wall system according to claim 6, characterized in that: Said S1 further comprises the following steps: After completing the spatial layout design of the building, mechanical and electrical equipment, and pipelines, the positions of the cast-in-place components are vacated in the 3D-printed infill wall through Boolean operations to obtain the difference set according to the positions of the lintels, horizontal tie beams, ring beams, window sill beams, and mechanical and electrical pipelines.

8. The construction method of the steel frame structure filled with in-situ 3D printed reinforced wall system according to claim 6, characterized in that: The S6 further comprises the following steps: S61: After extruding the wall lines and reinforcing ribs to a certain number of layers, horizontal steel bars are laid within the wall lines and vertical dowel bars of the cast-in-place core columns are tied; S62: Additional tie bars shall be laid every 600mm inside the wall line. The additional tie bars shall be anchored into the post-cast column for a length of not less than 200mm and anchored into the wall line for a length of not less than 500mm. S63, after printing to a certain height, pour the cast-in-place core column concrete to avoid excessive mold expansion force caused by pouring at a high printing height.

9. The construction method of the steel frame structure filled with in-situ 3D printed reinforced wall system according to claim 6, characterized in that: The S7 further comprises the following steps: S71, stop the 3D printing equipment at the elevation of the top of the window sill beam, lay steel mesh within a length of 250 mm on both sides of the door and window openings and at the elevation of the bottom of the window sill beam to serve as the bottom formwork of the window sill beam, use the 3D printed wall as the side formwork of the window sill beam, pour the printing mortar and perform curing, and continue printing the wall after reaching the design strength; S72: Stop the 3D printing equipment when printing reaches the top elevation of the lintel and horizontal tie beam. Lay a 3D printed plastic formwork directly below the door and window openings. Lay a steel mesh along the axis of the 3D printed wall to serve as the bottom formwork for the lintel and horizontal tie beams. Use the 3D printed wall as the side formwork for the lintel and horizontal tie beams. Replace the steel pipes at the wooden formwork directly below the door and window openings. Pour the printed mortar and perform curing. Continue printing the wall after reaching the design strength. S73: Stop the 3D printing equipment when printing reaches the top elevation of the ring beam. Lay a steel mesh along the axis of the 3D printed wall as the bottom formwork of the ring beam. Use the 3D printed wall as the side formwork of the ring beam. Pour the printing mortar and perform curing. Complete the infill wall construction after reaching the designed strength.

10. The construction method of a steel frame structure filled with an in-situ 3D printed reinforced wall system according to claim 6, characterized in that: The S9 further comprises the following steps: S91, after the main steel frame structure is hoisted into place, tie the post-cast column reinforcement and additional stirrups; S92, welding of additional stirrups for post-cast columns to steel columns; S93, support the post-cast column formwork and pour the printing mortar. The formwork near the steel column side uses extruded board, and the extruded board is opened according to the location of the additional stirrups; S94: Angle steel connectors are used to connect the ring beam and the steel truss floor deck at intervals of 1200mm, and flexible connecting materials are filled in the gap between the ring beam and the floor deck.

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