CN112709443B - Integrally-assembled reinforcement printing construction method for 3D printed concrete structure - Google Patents
Integrally-assembled reinforcement printing construction method for 3D printed concrete structure Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
Abstract
The invention discloses an integrally-assembled reinforcement printing construction method for a 3D printed concrete structure, which comprises the following steps: selecting structural members, and determining a reinforcement material according to the stress distribution and the stress intensity ratio under the bearing capacity limit state and the normal use bearing capacity state; determining the position, the number and the form of the connecting sleeves according to the position and the crossing number of the connecting point of the ribs; determining the printing processes of the concrete, the reinforcement and the connecting sleeve according to the spatial appearance of the structural member, and editing the timed positioning connection and pushing programs of the reinforcement and the connecting sleeve according to the printing processes; and forming a concrete layer along the printing process, putting the reinforcement materials and the connecting sleeve into the unhardened concrete layer according to a timed positioning connection and a pushing program, and assembling to form the 3D printing concrete structure with the reinforced space multidirectional connecting sleeve. The 3D printed concrete structure prepared by the construction method provided by the invention forms a space rigidity reinforced skeleton, and is similar to a steel reinforcement skeleton formed by a traditional construction method.
Description
Technical Field
The invention belongs to the technical field of intelligent construction and civil engineering construction, and particularly relates to an integrally-assembled reinforcement printing construction method for a 3D printed concrete structure.
Background
The 3D printing technology highlights strong technical advantages due to the advantages of mold-free construction, automatic construction and digital construction, and can realize mechanized and automatic construction engineering. The existing 3D printing concrete materials are more, such as CN201910134165, CN 201810913908, CN201910133642 and the like. The concrete material has the defects of low tensile strength, easy brittle failure and the like. The adoption of rigid aggregate and rigid fiber reinforced concrete is difficult to realize continuous and effective reinforcement spanning the printed layer strips, and the adoption of flexible continuous reinforcement compatible with the printing process is proved that the bearing capacity improvement efficiency is limited, the rigidity is not improved enough, and the structural safety under various working conditions is difficult to ensure, so that a safe and reliable assembly construction mode which is consistent with the traditional reinforcement cage type rigid reinforcement of the existing reinforced concrete and is compatible with a 3D printed concrete construction mode must be established.
CN109680954A provides an interlaminar reinforced 3D printed concrete structure and a construction method thereof, and reinforcement is carried out by adopting a mode of placing lap joint short ribs between layers. Although this approach is flexible and convenient and compatible with the printing process, the short ribs are disposed in the interlayer defect area and cannot span the interlayer for structural reinforcement. CN 201911213559.1 provides an interlayer stud method for a 3D printed concrete structure, which utilizes studs penetrating through the interlayer to strengthen, anchor and bond short ribs arranged between the layers, thereby ensuring the effectiveness of component reinforcement. However, the reinforcing bars formed by the two technologies are in contact lap joint and cannot form a continuous rigid-connection reinforced framework, and when a reinforced concrete structure bears a large load or a load such as an earthquake, an impact and the like, the rigidity and the strength of the reinforced framework and the cooperative performance with the concrete structure are difficult to guarantee. How to ensure the space manufacture and the integral rigid connection of the reinforcement framework, and the method can be compatible with the manufacture flow of 3D printed concrete to form an assembly type construction system with strong bearing capacity, high construction efficiency and high processing precision, and is a technical key and difficult problem of the 3D printed reinforcement concrete structure construction technology at the present stage.
Disclosure of Invention
The invention aims to provide an integrally-assembled reinforcement printing construction method for a 3D printing concrete structure, which can realize interlayer and strip space multidirectional reinforcement and integral connection in the concrete structure printing process by adopting a space multidirectional connecting sleeve, can position and regularly place rigid reinforcement sections according to a printing process, and adopts a multidirectional sleeve with an embedding and buckling function to connect and form a space reinforcement structure with good integrity, thereby forming a numerical assembly construction technology which can be integrated with 3D printing construction.
In order to achieve the above objects and achieve the above technical effects, the present invention is implemented by the following technical solutions:
a method of integrally fabricated, rebar-printing construction for a 3D-printed concrete structure, the method comprising:
(1) selecting a structural member, performing mechanical analysis, and determining the material, the total amount, the arrangement position and the strength of the rib material and the strength of the connecting sleeve according to the stress distribution and the stress size of the structural member in the bearing capacity limit state;
(2) determining the diameter, the surface form, the distance from the outer edge of the concrete layer and the distance between the reinforcement and the outer edge of the concrete layer according to the stress intensity ratio under the normal use bearing capacity state; determining the position, the number and the form of the connecting sleeves according to the position and the crossing number of the connecting point of the ribs;
(3) determining the printing processes of the concrete, the reinforcement and the connecting sleeve according to the spatial appearance of the structural member, and editing the timed positioning connection and pushing programs of the reinforcement and the connecting sleeve according to the printing processes;
(4) extruding a 3D printing material along a printing process to form a concrete layer, putting the rib material and the connecting sleeve into the unhardened concrete layer according to a timed positioning connection and pushing program, assembling to form a space skeleton, and building layer by layer, then superposing, hardening and forming to form the 3D printing concrete structure reinforced by the whole reinforced rib of the space multidirectional connecting sleeve at one time.
Wherein, in the step (2), the surface morphology refers to the surface morphology of ribbed, smooth round or sand blasting and the like; after determining the diameter in step (2), the number of the ribs can be determined according to the total amount. In the step (2), the form of the connecting sleeve refers to a one-way connecting sleeve or a multi-way connecting sleeve, and the multi-way connecting sleeve is a two-way connecting sleeve, a three-way connecting sleeve or a four-way or more connecting sleeve.
The diameter of the reinforcing material and the outer edge of the concrete layer are not less than 2mm clear distance. The diameter of the connecting sleeve is 1-2mm larger than that of the rib material; the strength of the connecting sleeve is greater than that of the rib.
The material of the rib material is selected from one or the combination of two or more of steel, alloy, fiber composite material or nano rigid material. In the present invention, an alloy means a substance having a metallic property, which is synthesized from two or more metals and metals or nonmetals by a certain method.
The 3D printing material is selected from one or a combination of two or more of a cement-based material, a gypsum material or a nylon material.
The 3D printing material also comprises a reinforcing component, wherein the reinforcing component is selected from one or a combination of two or more of various fibers and polymers thereof, expanded microbeads, hollow particles or nano materials.
In the step (4), the connecting method of the rib and the connecting sleeve comprises the following steps: in the parallel printing direction, the 3D printing material is integrally inserted into the rib material and connected with the connecting sleeve when the base body is printed; in the vertical printing direction, the rib materials are vertically inserted and embedded into the connecting sleeve for fixing before 3D printed concrete is solidified, so that a space reinforcing framework is formed.
The length of the connecting sleeve in the vertical printing direction is at least 2mm greater than the thickness of the single-layer concrete.
The connecting sleeve adopts an axially fixed spring chuck, and comprises a chuck, a simple clamp, a collet chuck, a nut and a screw, wherein the rib is inserted into the taper hole of the main shaft through the chuck, the nut is screwed when the simple clamp is axially fixed, the collet chuck is forced to contract to clamp the rib section, and the screw is used for preventing the simple clamp from rotating.
The printing construction method provided by the invention utilizes the rib material and the multidirectional space sleeve to form the integral framework to enhance the strength and the deformability of the concrete structure.
Before 3D concrete structure printing is carried out, rigid reinforcing bar materials are prefabricated in sections according to a numerical model, and unidirectional, bidirectional and multidirectional space reliable connection is realized through the space multidirectional connecting sleeve with the built-in wedge-shaped anchor buckle designed by the invention in the printing process.
In order to ensure that the protective layer has enough thickness and durability, the arrangement of the reinforcing bars is started after enough thickness of the protective layer is reserved. The most common contour process of 3D printing concrete is flatly laid and is watered the printing mode, selects muscle material diameter according to printing layer ejection of compact bore, and the diameter is greater than the single-deck concrete and prints the high process that can influence and beat printer head and march. The number of the reinforcing bars in each direction is determined according to the space stress of the 3D printing structure, and the space connection position and mode of the reinforcing bars are determined according to the structural construction requirements. The selection standard is that the net distance between the rib material and the edge of the layer edge is not less than 2 mm. Taking the thickness of a common layer of a 3D printed concrete structure at the present stage as 10mm as an example, the diameter of the reinforcing rib material is preferably 3-6 mm. The diameter of the sleeve is 1-2mm larger than that of the reinforcing rib, and a fixed spring chuck is arranged in the sleeve, so that the sleeve can be effectively embedded and fixed when the rib is pushed. The length of the sleeve can be optimized according to the structural stress. The length of the sleeve pipe perpendicular to the printing strip direction is 2mm larger than the thickness of the single-layer concrete, so that the printing layer is guaranteed to penetrate through, and effective connection and effective embedding between layers are completed.
The strength of the connecting sleeve material is greater than that of the rib material, and the arrangement distance is set according to space stress checking calculation and rib material printing equipment parameters.
After printing layer strips on each layer is finished, arranging reinforcing bars and sleeves along the main tensile stress trace of the structure. During printing, the sleeve is arranged between layers and is vertically inserted with wet concrete layer strips. And continuously printing the next layer until the integral printing, reinforcing ribs and connection are finished.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. by adopting the integrally-assembled reinforcement printing construction method for the 3D printed concrete structure, the technical problems that the traditional concrete structure is difficult to digitally assemble and construct, the 3D printed concrete structure is difficult to reinforce and a space rigidity reinforcing framework is formed are effectively solved.
2. A timed positioning space connection program is designed according to the 3D printing concrete laminating manufacturing process, the method is suitable for concrete printing processes of various space structure models, and the space integrity and effectiveness of the reinforced framework are guaranteed.
3. By adopting the integrally-assembled reinforcement printing construction method for the 3D printed concrete structure, the large space bearing capacity is provided, and the shearing damage of the structure in the printing and loading processes is avoided. Because the existence of gap between layer and the gap between the strip, 3D prints concrete wholeness and is not than the concrete that the template was pour, adopts tiling, pile to water the concrete roof beam that prints and can probably take place along the fracture mode of interlaminar face splitting in printing and loading process, and the multidirectional adapter sleeve in space has effectively consolidated adjacent interlaminar face, has improved the space wholeness of printing the structure.
4. The integrally-assembled reinforcement printing construction method for the 3D printed concrete structure has the advantages of being convenient and applicable to printing equipment, printing processes and reinforcing reinforcements. The space rigid skeleton formed by printing is similar to the steel bar skeleton formed by the traditional construction method, and the design calculation method of the space rigid skeleton is similar to that of the existing design rule theoretical system, so that the space rigid skeleton has high engineering applicability.
Drawings
FIG. 1 is a schematic view of a coupling sleeve;
FIG. 2 is a schematic detail view of an inner buckle structure of the connecting sleeve;
FIG. 3 is a printing construction flow chart of the 3D printing concrete structure integrally assembled reinforcement structure;
FIG. 4 is a schematic structural view of a connecting sleeve connecting a bar-reinforced beam member;
FIG. 5 is a schematic structural view of a connecting sleeve connecting a rib material reinforced plate type component;
FIG. 6 is a schematic view of the construction of a connecting sleeve connecting a tendon reinforced column element;
FIG. 7 is a schematic view of a printing process for constructing a connecting sleeve connecting a bar-reinforced beam member;
FIG. 8 is a schematic view of a printing process for constructing a connecting sleeve connecting a reinforcement plate member;
fig. 9 is a schematic view of the printing and construction process of connecting the sleeve connecting reinforcement column element.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
the printing construction method of the 3D printing concrete structure integrally-assembled reinforcement structure provided by the invention comprises the following steps: 3D printing device prints building component or function auxiliary according to predetermineeing the structure space molding layering, when adopting 3D printing material space to print the building base member, implants the muscle material wherein according to regularly fixing a position connection and propelling movement procedure, and the buckle and the anchor through adapter sleeve are fixed at muscle material juncture to form stable space skeleton and have the supporting role to the whole structure. The building method can adapt to various printing processes and space modeling. Through extrusion and hydration hardening of a printing substrate, a space toughness structure with cooperative stress and consistent deformation is formed, and the printing substrate has higher bearing capacity, deformation capacity and multidirectional crack resistance and meets the structural function requirements.
The connecting sleeve of the invention is shown in figure 1, wherein a, b, c, d and e in figure 1 are respectively a one-way connecting sleeve, a two-way connecting sleeve, a three-way connecting sleeve, a four-way connecting sleeve and a five-way connecting sleeve, and r is a rib material; the internal structure is shown in fig. 2, a rib r is inserted into a taper hole of a main shaft through a chuck 1, a simple clamp 3 plays a role in axial fixation, a nut 2 is screwed after fixation, the collet 4 is forced to contract to clamp a rib section, and a screw 5 is used for preventing the simple clamp from rotating. And (5) reversing the nut, ejecting the simple clamp, and loosening the rib material section.
The integrally-assembled reinforcement printing construction method of the 3D printed concrete structure is shown in figure 3.
Example 1
The printing and construction sub-steps are described by taking the beam member of fig. 4 and 7 (beam-beam, r-reinforcing bar, a-one-way joint sleeve, m-construction robot arm, P-printed concrete, c-three-way joint sleeve, X-printed direction, Z-stacking direction) as an example:
1. and determining the structural form and the spatial structure according to the structural function requirement. The beam member bears large bending moment, the beam bottom generates large tensile stress, and a plurality of reinforcing materials need to be arranged to meet the stress requirement of the structure. Performing mechanical calculation analysis on the structural member, and respectively determining the material, the total amount, the arrangement position and the strength, the diameter, the surface form, the distance and the distance between the structural member and the outer edge of the concrete layer according to the structural bearing capacity limit state and the normal use limit state; and the position, the number and the form of the connecting sleeves are determined according to the position and the crossing number of the connecting point of the ribs. In this embodiment, the form of the adapter sleeve used includes a one-way adapter sleeve and a three-way adapter sleeve.
2. The printing process of the concrete, the reinforcing materials and the connecting sleeves is determined according to the overall structure of the beam-type member and the printing equipment in the embodiment, and the timed positioning connection and pushing program of the reinforcing materials and the connecting sleeves is edited according to the printing process.
3. Preparing a 3D printing material, printing along the X direction according to a printing process, stacking along the Z direction, printing a beam type component structure layer by layer, arranging a mechanical arm m beside a printing head, carrying a rib material section r and a c-three-way sleeve, editing along a printing path, clamping the rib material section r, the a-one-way connecting sleeve and the c-three-way connecting sleeve by the mechanical arm m according to a timing positioning connection and pushing program, placing the rib material section r, the a-one-way connecting sleeve and the c-three-way connecting sleeve into unhardened concrete, and assembling.
4. The 3D printing matrix and the reinforcing material connected with the sleeve are bonded, cured and molded under the action of upper gravity, a solid and reliable spatial continuous framework is formed inside, and the bending resistance, shearing resistance and crack resistance of the printing structure can be further improved.
Example 2
Taking the plate-type member of fig. 5 and 8 (plate-type, r-rib, d-four-way joint sleeve, c-three-way joint sleeve, m-construction robot arm, P-printing concrete, X-printing direction, Z-stacking direction) as an example, the printing and construction steps are described as follows:
1. performing mechanical calculation analysis on the plate, and respectively determining the material, the total amount, the arrangement position and the strength, the diameter, the surface form, the distance and the interval between the material and the outer edge of the concrete layer, which are added into the structural member according to the structural bearing capacity limit state and the normal use limit state; and the position, the number and the form of the connecting sleeves are determined according to the position and the crossing number of the connecting point of the ribs. In this embodiment, the form of the adapter sleeve used includes a one-way adapter sleeve and a three-way adapter sleeve.
2. The printing process of the concrete, the reinforcing materials and the connecting sleeves is determined according to the overall structure of the beam-type member and the printing equipment in the embodiment, and the timed positioning connection and pushing program of the reinforcing materials and the connecting sleeves is edited according to the printing process.
3. Preparing a 3D printing material, printing along the X direction according to a printing process, stacking along the Z direction, printing layer by layer, arranging a mechanical arm m beside a printing head, carrying a rib material section r, a c-three-way connecting sleeve and a D-four-way connecting sleeve, carrying out space positioning and signal editing along with a printing path, clamping the rib material, the c-three-way connecting sleeve and the D-four-way connecting sleeve by utilizing a mechanical arm m to perform timing positioning connection and a pushing program, putting the rib material, the c-three-way connecting sleeve and the D-four-way connecting sleeve into unhardened concrete, and assembling.
4. The 3D printing matrix is bonded and cured under the action of upper gravity to form a solid and reliable space continuous framework, and the bending resistance, shearing resistance and crack resistance of the printing structure are further improved.
Example 3
Taking column-column, e-multi-directional casing, m-construction robot arm, r-tendon) column members of fig. 6 and 9 as examples, printing and construction are performed according to the following steps:
1. performing mechanical calculation analysis on the column, and respectively determining the material, the total amount, the arrangement position and the strength, the diameter, the surface form, the distance and the interval between the material and the outer edge of the concrete layer, which are added into the structural member, according to the structural bearing capacity limit state and the normal use limit state; and the position, the number and the form of the connecting sleeves are determined according to the position and the crossing number of the connecting point of the ribs. In this embodiment, the form of the adapter sleeve used includes a one-way adapter sleeve and a three-way adapter sleeve.
2. The printing process of the concrete, the reinforcing materials and the connecting sleeves is determined according to the overall structure of the beam-type member and the printing equipment in the embodiment, and the timed positioning connection and pushing program of the reinforcing materials and the connecting sleeves is edited according to the printing process.
3. Preparing a 3D printing material, printing along the X direction according to a printing process, stacking along the Z direction, printing layer by layer, arranging a mechanical arm m beside a printing head to carry rib material sections r and e-multidirectional connecting sleeves, carrying out space positioning and signal editing along a printing path, clamping the rib material and the e-multidirectional connecting sleeves by the mechanical arm m according to a timed positioning connection and pushing program, and putting the rib material and the e-multidirectional connecting sleeves into unhardened concrete for assembling.
4. The 3D prints muscle material that base member and bushing are connected and bonds the solidification shaping under the action of upper gravity, forms firm reliable space continuous skeleton in inside, further promotes to print column type structure resistance to compression, bending resistance and anti-seismic performance.
The embodiment adopts a regular shape example under a plane rectangular coordinate system, and is a whole assembly type reinforcement printing construction method for a 3D printed concrete structure, but the technology and design of the invention can adapt to the construction of the reinforcement concrete structure designed by various space models, and the novel 3D printed concrete structure which is integrally reinforced by connecting rigid reinforcement sections through space multidirectional sleeves with mortise and tenon fasteners has various printing processes, and has the construction adaptability of various space models and various building materials, and can form a novel construction method with digital design, printing manufacture and assembly type reinforcement.
It will be apparent to those skilled in the art that the present invention is not limited to the integrally fabricated reinforcement printing construction method for a 3D printed concrete structure of the above-described exemplary embodiment, and the present invention can be implemented in other spatial modeling forms, caulking details, and integral combinations without departing from the spirit or essential characteristics of the present invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. An integrally fabricated reinforcement printing construction method for a 3D printed concrete structure, characterized in that the method comprises:
(1) selecting a structural member, performing mechanical analysis, and determining the material, the total amount, the arrangement position and the strength of the rib material and the strength of the connecting sleeve according to the stress distribution and the stress size of the structural member in the bearing capacity limit state;
(2) determining the diameter, the surface form, the distance from the outer edge of the concrete layer and the distance between the reinforcement and the outer edge of the concrete layer according to the stress intensity ratio under the normal use bearing capacity state; determining the position, the number and the form of the connecting sleeves according to the position and the crossing number of the connecting point of the ribs; the form of the connecting sleeve is a unidirectional connecting sleeve or a multidirectional connecting sleeve, and the multidirectional connecting sleeve is a bidirectional connecting sleeve, a three-way connecting sleeve and a four-way or more connecting sleeve; the connecting sleeve is provided with a built-in wedge-shaped anchor buckle;
(3) determining the printing processes of the concrete, the reinforcement and the connecting sleeve according to the spatial appearance of the structural member, and editing the timed positioning connection and pushing programs of the reinforcement and the connecting sleeve according to the printing processes;
(4) extruding a 3D printing material along a printing process to form a concrete layer, putting the rib material and the connecting sleeve into the unhardened concrete layer by a mechanical arm arranged beside the printing head according to a timed positioning connection and pushing program, assembling to form a space skeleton, and building layer by layer, then superposing, hardening and forming to form a 3D printing concrete structure reinforced by the integral reinforcement of the space multidirectional connecting sleeve at one time;
the connecting sleeve adopts an axially fixed spring chuck, and comprises a chuck, a simple clamp, a collet chuck, a nut and a screw, wherein the rib is inserted into the taper hole of the main shaft through the chuck, the nut is screwed when the simple clamp is axially fixed, the collet chuck is forced to contract to clamp the rib section, and the screw is used for preventing the simple clamp from rotating.
2. The integrally fabricated reinforcement printing construction method for a 3D printed concrete structure according to claim 1, wherein the diameter of the reinforcement material is not less than 2mm clear distance from the outer edge of the concrete layer.
3. The integrally fabricated reinforcement printing construction method for a 3D printed concrete structure according to claim 1, wherein the diameter of the connecting sleeve is 1-2mm larger than that of the reinforcement; the strength of the connecting sleeve is greater than that of the rib.
4. The integrally fabricated reinforcement bar printing construction method for a 3D printed concrete structure according to claim 1, wherein the material of the reinforcement bar is selected from one or a combination of two or more of steel, alloy, fiber composite or nano rigid material.
5. The integrally fabricated reinforcement printing construction method for a 3D printed concrete structure according to claim 1, wherein the 3D printed material is selected from one or a combination of two or more of cement-based material, gypsum material or nylon material.
6. The integrally fabricated reinforcement printing construction method for a 3D printed concrete structure according to claim 1, wherein the 3D printed material further comprises a reinforcing component, and the reinforcing component is one or a combination of two or more of various types of fibers and polymers thereof, expanded beads, hollow particles or nano materials.
7. The integrally fabricated reinforcement printing construction method for a 3D printed concrete structure according to claim 1, wherein in the step (4), the connection method of the reinforcement and the connection sleeve is as follows: in the parallel printing direction, the 3D printing material is integrally inserted into the rib material and connected with the connecting sleeve when the base body is printed; in the vertical printing direction, vertically inserting the rib materials into the connecting sleeve and embedding the rib materials into the connecting sleeve for fixing before 3D printed concrete is solidified; forming a spatially enhanced framework.
8. The integrally fabricated reinforcement-printing construction method for a 3D-printed concrete structure according to claim 7, wherein the length of the connecting sleeve is at least 2mm greater than the thickness of the single-layered concrete in the vertical printing direction.
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| CN114109044B (en) * | 2021-11-25 | 2022-08-23 | 浙江大学 | 3D weaves and prints integration structure construction equipment |
| CN114589784B (en) * | 2022-03-16 | 2023-03-03 | 浙江大学 | Tunneling type concrete structure centrifugal intelligent construction equipment and application |
| CN115217272A (en) * | 2022-05-31 | 2022-10-21 | 中国建筑材料科学研究总院有限公司 | Rib material for 3D printing of inter-concrete-layer structure and construction method |
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| US10272613B2 (en) * | 2013-10-30 | 2019-04-30 | R. Platt Boyd, IV | Additive manufacturing of building and other structures |
| CN109129819A (en) * | 2018-09-25 | 2019-01-04 | 中国建筑股份有限公司 | A kind of on-site concrete 3D printing equipment and construction techniques |
| CN109162409A (en) * | 2018-10-19 | 2019-01-08 | 黑龙江建筑职业技术学院 | A kind of reinforcing bar locking sleeve and its method for connecting reinforcing bar |
| CN109531772B (en) * | 2018-12-07 | 2021-06-18 | 中国建筑材料科学研究总院有限公司 | Equipment and method for preparing building structure based on 3D printing |
| CN109680954B (en) * | 2019-01-29 | 2020-10-13 | 中国建筑第八工程局有限公司 | Interlayer reinforced 3D printed concrete structure and construction method thereof |
| CN110774407B (en) * | 2019-10-21 | 2020-08-25 | 浙江大学 | Construction method of space aggregate reinforced 3D printed concrete structure |
| CN111945876A (en) * | 2020-09-09 | 2020-11-17 | 清华大学 | Memory alloy reinforced 3D printing concrete structure and processing method |
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