3D printing concrete shear wall structure with anchoring points and construction method of 3D printing concrete shear wall structure

Abstract

The invention provides a 3D printing concrete shear wall structure with anchoring points and a construction method of the 3D printing concrete shear wall structure. The 3D printing concrete shear wall structure comprises an outer formwork formed by ultra-high performance concrete through 3D printing, a pouring area used for pouring concrete is formed in the outer formwork, and a reinforcement cage set is arranged in the pouring area; the two inner sides, in the x-axis direction, of the outer formwork protrude towards the pouring area to form anchoring units, and the anchoring units are constructed to form embedding grooves with groove openings parallel to the x-axis direction. The reinforcement cage set comprises a first reinforcement cage, a second reinforcement cage and a third reinforcement cage, the first reinforcement cage is provided with a connecting unit, the connecting unit is constructed to form a connecting part parallel to the y-axis direction and embedding parts arranged at the two ends of the connecting part, and the two embedding parts can be embedded into the embedding grooves in the two sides correspondingly; therefore, the connecting unit can be connected with the two sides, in the x-axis direction, of the outer mold shell. The structure is stably combined, the integrity and the bearing capacity are good, manpower and material resources are saved, and the actual engineering requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and in particular to a 3D printed concrete shear wall structure with anchor points and a construction method thereof. Background Art

[0002] When building a traditional reinforced concrete shear wall, it is necessary to first set up the formwork and support, fix and gather the concrete pouring area, then pour the concrete, and finally remove the formwork and support system after the concrete reaches the demolding strength. This step not only consumes a lot of manpower, but also fails to accurately control the amount of concrete, resulting in material waste. In addition, during the manual installation and removal of the formwork, it is easy for the construction workers to operate in an irregular manner, resulting in problems such as inaccurate formwork installation position leading to leakage at the root of the wall, uneven shear wall surface, and concrete damage when removing the formwork with tools such as crowbars.

[0003] 3D printed concrete structures are an innovative method of applying 3D printing technology to the fields of architecture and engineering, which manufactures building components by stacking concrete materials layer by layer. The current 3D printed concrete structures are single, the wall surface and the steel bars arranged inside are not firmly combined, and the structural performance may not meet the actual requirements of the project.

[0004] In view of this, the applicant filed this application after studying the existing technology. Summary of the invention

[0005] The present invention provides a 3D printed concrete shear wall structure with anchor points and a construction method thereof, aiming to improve at least one of the above-mentioned technical problems.

[0006] To solve the above technical problems, the present invention provides a 3D printed concrete shear wall structure with anchor points, comprising an outer formwork formed by 3D printing of ultra-high performance concrete, a pouring area for pouring concrete formed in the outer formwork, a steel cage group being arranged in the pouring area; anchor units are formed on the two inner sides of the outer formwork in the x-axis direction protruding toward the pouring area, wherein the anchor units are constructed to form an engaging groove with a notch parallel to the x-axis direction; the steel cage group comprises a first steel cage, the first steel cage is provided with a connecting unit, the connecting unit is constructed to form a connecting portion parallel to the y-axis direction and an engaging portion arranged at both ends of the connecting portion, the two engaging portions can be respectively engaged with the engaging grooves on both sides, so that the connecting unit can be connected to both sides of the outer formwork in the x-axis direction.

[0007] As a further optimization, the anchoring unit includes a T-shaped formwork, and multiple T-shaped formworks are arranged at equal intervals and staggered on both sides of the outer formwork; the connecting unit includes a Z-shaped horizontal steel bar, and the engaging parts at both ends of the Z-shaped horizontal steel bar are respectively engaged and connected with the T-shaped formworks on both sides.

[0008] As a further optimization, the anchoring unit also includes an L-shaped mold shell, which is staggered at both end sides of the anchoring unit; the connecting unit also includes a C-shaped horizontal steel bar, and the interlocking parts at both ends of the C-shaped horizontal steel bar are respectively used to interlock and connect the L-shaped mold shell on one side and the T-shaped mold shell on the other side.

[0009] As a further optimization, the first steel cage is also provided with a first horizontal steel bar and a first vertical steel bar; the first horizontal steel bar is in a U-shaped structure and is arranged at equal intervals along the z-axis direction, and is located between the anchor units on both sides of the outer formwork; the first horizontal steel bar is respectively provided with a first connecting end intersecting with the Z-shaped horizontal steel bar, and is respectively provided with a second connecting end intersecting with the C-shaped horizontal steel bar; the first vertical steel bar is respectively connected to the first connecting end and the second connecting end, and is located on the inner side of the first horizontal steel bar.

[0010] As a further optimization, a cavity is provided in the anchoring unit, and the cavity is used for pouring concrete.

[0011] As a further optimization, the steel cage group also includes a second steel cage, which is arranged between two T-shaped formwork shells; wherein the second steel cage is provided with a second horizontal steel bar and a second vertical steel bar connected to each other, the second horizontal steel bars are arranged at equal intervals in the z-axis direction and in a U-shaped structure, and the second vertical steel bars are arranged at the four vertices on the inner side of the second horizontal steel bar.

[0012] As a further optimization, the steel cage group also includes a third steel cage, which is arranged at both side ends of the outer formwork in the x-axis direction; wherein the third steel cage is provided with a third horizontal steel bar and a third vertical steel bar connected to each other, the third horizontal steel bars are arranged at equal intervals in the z-axis direction and in a U-shaped structure, and the third vertical steel bars are arranged at the four vertices on the inner side of the third horizontal steel bar.

[0013] As a further optimization, the engaging portion is a circular structure.

[0014] The present invention also provides a construction method of a 3D printed concrete shear wall structure with anchor points as described in any one of the above, comprising the following steps: Step S1: using ultra-high performance concrete to print an outer formwork using a 3D printer; Step S2: manufacturing a first steel cage, a second steel cage and a third steel cage; hoisting and splicing a plurality of second steel cages on both sides of the long side of the first steel cage, hoisting and splicing two third steel cages on both sides of the short side of the first steel cage, and welding and reinforcing the intersection nodes of the steel cages by welding to form a steel cage group; Step S3: hoisting the steel cage assembly into the outer formwork; Step S4: pouring concrete into the cavity and the pouring area and vibrating.

[0015] As a further optimization, in step S1, when encountering an anchor unit while printing the outer peripheral wall, first turn inward at the junction to print the anchor unit, then print the wall, and complete the printing along the four sides of the outer mold shell.

[0016] By adopting the above technical solution, the 3D printed concrete shear wall structure with anchor points and the construction method thereof provided in this application have the following beneficial effects: The 3D printed shear wall structure in this application uses a 3D printed ultra-high performance concrete outer formwork as a template for filling concrete. It is combined with the outer formwork and the protruding anchoring units around the inner side of the outer formwork and the placed steel cage group, and then poured with concrete. It is firmly combined and has good integrity and bearing capacity, meeting the actual needs of the project.

[0017] In addition, the anchoring units on the concrete outer formwork in the present invention can increase the equivalent thickness of the outer formwork to a certain extent, thereby increasing the lateral stability of the shear wall.

[0018] Compared with traditional reinforced concrete structure construction methods, this structure and its construction method are more precise, can reduce some of the human resources in the shear wall construction process, and can also reduce material waste and reduce carbon footprint, achieving a more sustainable building model.

[0019] This structure and its construction method have good feasibility in construction technology. The steel cage group can be assembled and placed in the concrete outer formwork after 3D printing. The subsequent pouring work does not require the use of formwork, avoiding leakage problems, saving a lot of manpower and material resources, and improving the shear wall construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1It is a structural schematic diagram of a 3D printed concrete shear wall structure with anchor points according to the present invention; Figure 2 It is a cross-sectional schematic diagram of a 3D printed concrete shear wall structure with anchor points according to the present invention; Figure 3 is a schematic structural diagram of a first steel cage in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a second steel cage in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a third steel cage in an embodiment of the present invention; Figure 6 2 is a schematic diagram of the structure of the outer formwork in an embodiment of the present invention; Markings in the figure: 1. Outer formwork; 2. Casting area; 3. First steel cage; 4. Second steel cage; 5. Third steel cage; 11. Wall; 12. T-shaped formwork; 13. L-shaped formwork; 14. Cavity; 15. Fitting groove; 31. Z-shaped horizontal steel bar; 32. C-shaped horizontal steel bar; 33. First horizontal steel bar; 34. First vertical steel bar; 35. Fitting part; 41. Second horizontal steel bar; 42. Second vertical steel bar; 51. Third horizontal steel bar; 52. Third vertical steel bar. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Depend on Figures 1 to 6As shown, an embodiment of the present invention provides a 3D printed concrete shear wall structure with anchor points, including an outer formwork 1 formed by ultra-high performance concrete (UHPC) through 3D printing, wherein conventional UHPC (without steel fiber) has ultra-high strength and high durability, and its compressive strength can generally reach 120-200MPa, and it also has excellent crack resistance. Using it as a shear wall formwork can effectively give play to the advantages of UHPC, thereby reducing material waste and labor costs. Preferably, a pouring area 2 for pouring concrete is formed in the outer formwork 1, and a steel cage group is arranged in the pouring area 2; the outer periphery of the outer formwork 1 is a rectangular wall 11, the long side in the x-axis direction and the short side in the y-axis direction, and the inner sides of the long sides of the outer formwork 1 protrude toward the pouring area 2 to form anchoring units, wherein the anchoring units are constructed to form an engaging groove 15 with a notch parallel to the x-axis direction; the steel cage group includes a first steel cage 3, and the first steel cage 3 is provided with a connecting unit, and the connecting unit is constructed to form a connecting groove parallel to the y-axis direction. The connecting portion and the engaging portions 35 arranged at both ends of the connecting portion, the two engaging portions 35 can be respectively engaged with the engaging grooves 15 on both sides, so that the connecting unit can be connected to the two sides of the outer formwork 1 in the x-axis direction, so that the two sides of the long side wall 11 that mainly bear the load in this embodiment establish a connection relationship through the connecting unit, and at the same time, the steel cage group itself is firmly engaged in the engaging groove 15 through the engaging portion 35 of the connecting unit, so as to realize the firm combination of the steel bars and the outer formwork 1 wall 11 in this embodiment, thereby improving the structural strength of the shear wall.

[0024] Furthermore, the outer formwork 1 printed by 3D using ultra-high performance concrete is used as the formwork wall surface 11 for shear wall casting, and no manual formwork is required, which avoids leakage of mortar at the root of the wall and uneven shear wall surface 11 caused by improper operation of construction workers, such as inaccurate formwork installation position; at the same time, there is no need to remove the formwork later, which avoids the problem of concrete damage when removing the formwork with traditional tools such as crowbars, and saves a lot of labor costs. Among them, the 3D printer is a six-axis multi-arm concrete 3D printer. The 3D printing method can accurately control the printing material to form a standard-sized concrete outer formwork 1, avoiding unnecessary waste of concrete and greatly reducing the manufacturing cost of the shear wall.

[0025] Preferably, the anchoring unit includes a T-shaped formwork 12, and a plurality of T-shaped formworks 12 are arranged at equal intervals and staggered on both sides of the outer formwork 1. By providing the T-shaped formwork 12, the equivalent thickness of the wall surface 11 can be increased, which is different from the ordinary plane wall surface 11, so that the shear wall in the 3D printed shear wall structure has better lateral stability, and after pouring, the T-shaped formwork 12 can serve as an anchor point extending into the concrete, thereby strengthening the connection between the outer formwork 1 and the poured concrete, making the shear wall more integrated and having higher structural strength.

[0026] Furthermore, the connection unit includes a Z-shaped horizontal steel bar 31, and the two end engaging portions 35 of the Z-shaped horizontal steel bar 31 are respectively engaged with the two side T-shaped formworks 12. Among them, the engaging portion 35 at one end of the Z-shaped horizontal steel bar 31 is engaged with the engaging groove 15 of the T-shaped formwork 12 of one side wall 11, and the other end is engaged with the engaging groove 15 of the T-shaped formwork 12 at an intersecting position on the other side wall 11. At this time, the Z-shaped horizontal steel bar 31 can be limited by the two side T-shaped formworks 12, thereby enhancing the stability effect after connection.

[0027] Preferably, the anchoring unit also includes an L-shaped formwork 13, which is staggered at both ends of the anchoring unit. In this embodiment, due to the staggered arrangement of the T-shaped formwork 12, the anchoring unit lacks a piece at the lower left corner and the upper right corner, and cannot connect to the Z-shaped horizontal steel bar 31. At this time, the L-shaped formwork 13 is arranged here to correspond to the T-shaped formwork 12 on the other side. At the same time, further, the connection unit also includes a C-shaped horizontal steel bar 32, and the two end engaging portions 35 of the C-shaped horizontal steel bar 32 are respectively used to engage and connect the L-shaped formwork 13 on one side and the T-shaped formwork 12 on the other side. In this way, the C-shaped horizontal steel bar 32 is used as the outermost connection structure of the connection unit to respectively connect the engaged L-shaped formwork 13 and the T-shaped formwork 12, so that the engaging groove 15 of each anchoring unit has an engaged engaging portion 35, which further strengthens the connection relationship between the two side walls 11, and the overall strength of the shear wall is higher.

[0028] Among them, the first steel cage 3 is also provided with a first horizontal steel bar 33 and a first vertical steel bar 34; the first horizontal steel bar 33 is in a round-shaped structure, and is arranged at equal intervals along the z-axis direction, and is located between the anchoring units on both sides of the outer formwork 1; the first horizontal steel bar 33 is respectively provided with a first connection end intersecting with the Z-shaped horizontal steel bar 31, and is respectively provided with a second connection end intersecting with the C-shaped horizontal steel bar 32; the first vertical steel bar 34 is respectively connected and provided on the first connection end and the second connection end, and is located on the inner side of the first horizontal steel bar 33. In this way, a complete structure of the first steel cage 3 is formed. The first steel cage 3 is used as the core steel skeleton in this embodiment. The first steel cage 3 is connected in the embedding groove 15 of the anchoring unit through the embedding portion 35 of the Z-shaped horizontal steel bar 31 and the C-shaped horizontal steel bar 32, which greatly strengthens the connection relationship between the two side walls 11 while also ensuring the shear wall section bearing capacity requirements.

[0029] Preferably, the engaging portion 35 is a zigzag structure. By setting the engaging portion 35 as a zigzag structure, not only the connection surface with the engaging groove 15 is increased, but also concrete can be placed inside the zigzag structure after pouring, thereby strengthening the connection strength between the engaging portion 35 and the concrete.

[0030] Preferably, a cavity 14 is provided in the anchoring unit, and the cavity 14 is used for pouring concrete.

[0031] Preferably, the steel cage group further includes a second steel cage 4, which is arranged between the two T-shaped formworks 12; wherein the second steel cage 4 is provided with second horizontal steel bars 41 and second vertical steel bars 42 connected to each other, the second horizontal steel bars 41 are arranged at equal intervals in the z-axis direction and in a roundabout structure, and the second vertical steel bars 42 are arranged at four vertices inside the second horizontal steel bars 41, thereby forming a complete second steel cage 4. The second steel cage 4 not only fills the space between two adjacent anchoring units and can serve as a supporting structure between the two, but is also connected to the first steel cage 3 to form a larger steel cage, thereby improving the integrity of the steel structure inside the casting area 2 and increasing the stability of the shear wall.

[0032] Preferably, the steel cage group further includes a third steel cage 5, which is arranged at both ends of the outer formwork 1 in the x-axis direction, that is, in the space between the outermost anchoring unit and the short side wall 11; wherein the third steel cage 5 is provided with a third horizontal steel bar 51 and a third vertical steel bar 52 connected to each other, the third horizontal steel bars 51 are arranged at equal intervals in the z-axis direction and are in a roundabout structure, and the third vertical steel bars 52 are arranged at four vertices inside the third horizontal steel bars 51, thereby forming a complete third steel cage 5. The third steel cage 5 not only fills the vacant parts on both sides, but also connects with the first steel cage 3 to form a larger steel cage, thereby improving the integrity of the steel structure inside the casting area 2 and increasing the stability of the shear wall.

[0033] The present invention also provides a construction method of a 3D printed concrete shear wall structure with anchor points as described in any one of the above, comprising the following steps: Step S1: using ultra-high performance concrete to print an outer formwork 1 through a six-axis multi-arm concrete 3D printer, the outer formwork 1 is a peripheral wall 11 formed by a rectangle and an anchoring unit protruding from the inner side of the long side; wherein, when the printed peripheral wall 11 encounters the anchoring unit, it first turns inward at the intersection to print the anchoring unit, and then prints the wall 11, and the printing is completed along the four sides of the outer formwork 1, thereby ensuring the integrity of the peripheral wall 11 and the internal anchoring unit.

[0034] Step S2: Make the first steel cage 3, the second steel cage 4 and the third steel cage 5; specifically, place the prepared Z-shaped horizontal steel bars 31 at equal intervals on the first horizontal steel bars 33, and place the C-shaped horizontal steel bars 32 on both end sides, and then tie the first vertical steel bars 34 at the junction of the above three, that is, the first connecting end and the second connecting end, and then tie the first horizontal steel bars 33, Z-shaped horizontal steel bars 31 and C-shaped horizontal steel bars 32 in sequence with equal intervals along the z-axis direction to complete the production of the first steel cage 3.

[0035] The second vertical steel bars 42 are arranged at the four vertices of the second horizontal steel bars 41 in a square shape, and the second horizontal steel bars 41 are placed at equal intervals along the z-axis direction, and tied to form a second steel cage 4. The third vertical steel bars 52 are arranged at the four vertices of the third horizontal steel bars 51 in a square shape, and the third horizontal steel bars 51 are placed at equal intervals along the z-axis direction, and tied to form a third steel cage 5.

[0036] Finally, multiple second steel cages 4 are hoisted and spliced ​​on both sides of the long side of the first steel cage 3, and two third steel cages 5 are hoisted and spliced ​​on both sides of the short side of the first steel cage 3, and the intersection nodes of the steel cages are welded and reinforced to form a complete steel cage group.

[0037] Step S3: hoisting the steel cage assembly into the outer formwork 1.

[0038] Step S4: pour concrete into the cavity 14 and the pouring area 2 and vibrate it. When the strength reaches the required level, the construction of the 3D printed concrete shear wall structure with anchor points is completed.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A 3D printed concrete shear wall structure with anchor points, characterized in that: It includes an outer formwork shell formed by ultra-high performance concrete through 3D printing, a pouring area for pouring concrete is formed in the outer formwork shell, and a steel cage group is arranged in the pouring area; the outer formwork shell has anchoring units protruding toward the pouring area on both inner sides in the x-axis direction, wherein the anchoring units are constructed to form an engaging groove with a notch parallel to the x-axis direction; the steel cage group includes a first steel cage, and the first steel cage is provided with a connecting unit, and the connecting unit is constructed to form a connecting portion parallel to the y-axis direction and an engaging portion arranged at both ends of the connecting portion, and the two engaging portions can be respectively engaged with the engaging grooves on both sides, so that the connecting unit can be connected to both sides of the outer formwork shell in the x-axis direction.

2. A 3D printed concrete shear wall structure with anchor points according to claim 1, characterized in that , the anchoring unit includes a T-shaped formwork, and a plurality of T-shaped formworks are arranged at equal intervals and staggered on both sides of the outer formwork; The connection unit comprises a Z-shaped horizontal steel bar, and the engaging parts at both ends of the Z-shaped horizontal steel bar are respectively engaged and connected with the T-shaped formworks on both sides.

3. A 3D printed concrete shear wall structure with anchor points according to claim 2, characterized in that , the anchoring unit further comprises an L-shaped formwork, and the L-shaped formwork is staggeredly arranged at both end sides of the anchoring unit; The connection unit also includes a C-shaped horizontal steel bar, and the engaging parts at both ends of the C-shaped horizontal steel bar are respectively used to engage and connect the L-shaped formwork on one side and the T-shaped formwork on the other side.

4. A 3D printed concrete shear wall structure with anchor points according to claim 3, characterized in that The first steel cage is also provided with a first horizontal steel bar and a first vertical steel bar; the first horizontal steel bar is in a U-shaped structure and is arranged at equal intervals along the z-axis direction and is located between the anchor units on both sides of the outer formwork; the first horizontal steel bar is respectively provided with a first connecting end intersecting with the Z-shaped horizontal steel bar, and is respectively provided with a second connecting end intersecting with the C-shaped horizontal steel bar; the first vertical steel bar is respectively connected to the first connecting end and the second connecting end, and is located on the inner side of the first horizontal steel bar.

5. A 3D printed concrete shear wall structure with anchor points according to claim 3, characterized in that A cavity is provided in the anchoring unit, and the cavity is used for pouring concrete.

6. A 3D printed concrete shear wall structure with anchor points according to claim 2, characterized in that The steel cage group also includes a second steel cage, which is arranged between two T-shaped formwork shells; wherein the second steel cage is provided with a second horizontal steel bar and a second vertical steel bar connected to each other, the second horizontal steel bars are arranged at equal intervals in the z-axis direction and in a circular structure, and the second vertical steel bars are arranged at four vertices on the inner side of the second horizontal steel bar.

7. A 3D printed concrete shear wall structure with anchor points according to claim 1, characterized in that The steel cage group also includes a third steel cage, which is arranged at both side ends of the outer mold shell in the x-axis direction; wherein the third steel cage is provided with a third horizontal steel bar and a third vertical steel bar connected to each other, the third horizontal steel bars are arranged at equal intervals in the z-axis direction and in a circular structure, and the third vertical steel bars are arranged at four vertices on the inner side of the third horizontal steel bar.

8. A 3D printed concrete shear wall structure with anchor points according to claim 1, characterized in that , the engaging portion is a circular structure.

9. A construction method for a 3D printed concrete shear wall structure with anchor points according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1: using ultra-high performance concrete to print an outer formwork using a 3D printer; Step S2: manufacturing a first steel cage, a second steel cage and a third steel cage; hoisting and splicing a plurality of second steel cages on both sides of the long side of the first steel cage, hoisting and splicing two third steel cages on both sides of the short side of the first steel cage, and welding and reinforcing the intersection nodes of the steel cages by welding to form a steel cage group; Step S3: hoisting the steel cage assembly into the outer formwork; Step S4: pouring concrete into the cavity and the pouring area and vibrating.

10. The construction method according to claim 9, characterized in that ,In step S1, when the anchor unit is encountered while printing the wall surface of the outer periphery, the anchor unit is first printed inward at the intersection, and then the wall surface is printed, and the printing is completed along the four sides of the outer mold shell.

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