JP2021137992A - Construction method for concrete structure and concrete structure - Google Patents

Abstract

To provide a construction method for a steel bar-reinforced concrete structure, the construction method being highly productive.SOLUTION: A construction method for a concrete structure of this invention includes: a stacked body formation step of forming a stacked body stacked with a concrete fluid that is ejected from an ejection nozzle of a supplementary production device to a fixation member and fixed on the fixation member; and a concrete structure formation step of, while ejecting the concrete fluid from the ejection nozzle and performing reinforcement with a reinforcement member disposed in a different position from the fixation member, forming the concrete structure in which the concrete fluid is further stacked on the stacked body.SELECTED DRAWING: Figure 4

Description

The present invention relates to a method of constructing a concrete structure and a concrete structure.

For example, when constructing a concrete structure such as a pier, first, the scaffolding is assembled. After that, the reinforcing bars are assembled on the foundation, the formwork is assembled so as to surround the reinforcing bars, and concrete is driven into the formwork. After curing and hardening the concrete, the formwork is disassembled (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-214290

However, assembling and disassembling the scaffolding when constructing the concrete structure is a complicated work and has been one of the factors hindering the improvement of the productivity of the construction method of the concrete structure.

The present invention has been made in view of the above circumstances, and provides a highly productive method for constructing a concrete structure and a concrete structure.

In the method for constructing a concrete structure according to the present invention, a concrete fluid is injected from an injection nozzle of an additional manufacturing apparatus onto a fixing member, and the concrete fluid is fixed to the fixing member to form a laminated body. In the body forming step, the concrete fluid is further laminated on the laminate while injecting the concrete fluid from the injection nozzle onto the laminate and reinforcing it with a reinforcing member provided at a position different from the fixing member. It is provided with a concrete structure forming step for forming a concrete structure.

According to the above-mentioned construction method of the concrete structure, the concrete fluid is fixed to the fixing member to form the laminated body by using the spraying method of the additional manufacturing apparatus, and the concrete is formed on the laminated body based on the laminated body. A concrete structure can be automatically manufactured by further laminating the fluid. According to such a construction method, it is not necessary to build a scaffolding, and the productivity of the concrete structure is increased.

In the method for constructing a concrete structure according to the present invention, the reinforcing member is formed of a plurality of linear reinforcing members extending in different directions, and the fixing member has an area smaller than the area of a gap between the plurality of reinforcing bars. The concrete structure is formed of a net-like body having holes formed therein, and in the concrete structure forming step, the concrete fluid is laminated on the laminated body and the reinforcing member while the reinforcing bars are filled with the concrete fluid. May be formed.

According to the above-mentioned construction method of the concrete structure, a plurality of reinforcing bars can be used as the reinforcing member. According to the above-mentioned construction method of the concrete structure, it can be easily prepared by using a net-like body without using a special member or the like as a fixing member.

In the method for constructing a concrete structure according to the present invention, the reinforcing member is formed of a plurality of reinforcing bars extending in different directions, and the fixing member has a laminated surface arranged along the outer shape of the concrete structure. It may be formed with a formwork, and in the step of forming the laminated body, the laminated body may be formed in which the concrete fluid is laminated on the laminated surface while the concrete fluid is applied to the laminated surface.

According to the above-mentioned construction method of the concrete structure, a plurality of reinforcing bars can be used as the reinforcing member. According to the above-mentioned construction method of the concrete structure, the formwork can be easily prepared by using the formwork without using a special member or the like as the fixing member. When the formwork is removed after the concrete fluid has hardened, the weight of the concrete structure can be reduced.

The concrete structure according to the present invention includes a concrete main body in which concrete fluids ejected from an injection nozzle of an additional manufacturing apparatus are laminated and hardened, and a reinforcing member buried inside the concrete main body.

The concrete structure according to the present invention may further include a fixing member which is arranged at a position different from the reinforcing member and which fixes the concrete fluid injected from the injection nozzle to itself.

In the concrete structure according to the present invention, the reinforcing member is composed of a plurality of reinforcing bars extending in different directions, and the fixing member is a net-like structure in which holes having an area smaller than the area of the gap between the plurality of reinforcing bars are formed. It may be a body.

In the concrete structure according to the present invention, the reinforcing member is composed of a plurality of reinforcing bars extending in different directions, and the fixing member is a formwork having a laminated surface arranged along the outer shape of the concrete structure. There may be.

According to each of the concrete structures described above, it becomes possible to automatically manufacture the concrete structure by using the spraying method of the additional manufacturing apparatus, and the productivity is increased.

In the concrete structure according to the present invention, the fixing member may extend in a straight line in a plan view in a region surrounded by the reinforcing member.

In the concrete structure according to the present invention, the fixing member may be curved in a plan view in a region surrounded by the reinforcing member.

In the concrete structure according to the present invention, the fixing member may extend radially from a predetermined center position in a plan view in a region surrounded by the reinforcing member.

In the concrete structure according to the present invention, the reinforcing member may be arranged in a frame shape on the outer side in the radial direction in a plan view.

According to each of the above-mentioned concrete structures, the shape and arrangement of the fixing member can be selected according to the shape of the concrete structure, the composition of the concrete fluid, and the like, and at least a reinforcing member can be provided.

According to the present invention, the productivity of concrete structures can be increased.

It is a side view of the concrete structure of 1st Embodiment of this invention. It is a cross-sectional view of the concrete structure shown in FIG. 1, and is a cross-sectional view taken along the line ZZ shown in FIG. It is a side view of the reinforcing member and the fixing member of the concrete structure shown in FIG. It is a side view for demonstrating the construction method of the concrete structure shown in FIG. It is a side view for demonstrating the construction method of the concrete structure shown in FIG. It is sectional drawing of the concrete structure of the 1st modification of 1st Embodiment of this invention, and corresponds to the sectional view seen by the ZZ line shown in FIG. It is sectional drawing of the concrete structure of the 2nd modification of 1st Embodiment of this invention, and corresponds to the sectional view seen by the ZZ line shown in FIG. It is sectional drawing of the concrete structure of the 3rd modification of 1st Embodiment of this invention, and corresponds to the sectional view seen by the ZZ line shown in FIG. It is sectional drawing of the concrete structure of the 4th modification of 1st Embodiment of this invention, and corresponds to the sectional view seen by the ZZ line shown in FIG. It is sectional drawing of the concrete structure of the 5th modification of 1st Embodiment of this invention, and corresponds to the sectional view seen by the ZZ line shown in FIG. It is sectional drawing of the concrete structure of 2nd Embodiment of this invention, and corresponds to the sectional view seen by the arrow ZZ shown in FIG. It is sectional drawing of the concrete structure of the 1st modification of the 2nd Embodiment of this invention, and corresponds to the sectional view seen by the ZZ line shown in FIG. It is sectional drawing of the concrete structure of the 2nd modification of the 2nd Embodiment of this invention, and corresponds to the sectional view seen by the ZZ line shown in FIG. It is sectional drawing of the concrete structure of the 3rd modification of the 2nd Embodiment of this invention, and corresponds to the sectional view seen by arrow ZZ shown in FIG.

Hereinafter, the construction method of the concrete structure and the embodiment of the concrete structure according to the present invention will be described with reference to the drawings.

(First Embodiment)
First, the configuration of the concrete structure 10 of the first embodiment according to the present invention and the construction method of the concrete structure 10 will be described.

[Construction of concrete structure]
As shown in FIGS. 1 to 3, the concrete structure 10 includes a concrete main body 21, a reinforcing member 30, and a fixing member 40. The concrete structure 10 of the first embodiment is a columnar body used for a civil engineering structure, a building, etc. (not shown), and is along the D1 direction substantially perpendicular to the foundation surface 5 such as the ground or the surface of the foundation. Is extending. The concrete structure 10 is formed in a substantially prismatic shape.

The concrete main body 21 is a product obtained by laminating and hardening concrete fluids injected from an injection nozzle (see FIG. 4) of an additional manufacturing apparatus. For example, a hydraulic mixture is used in the concrete main body 21, and contains various cement-based materials such as cement paste, mortar, concrete, and a geopolymer composition.

The reinforcing member 30 is embedded inside the concrete main body 21 and plays the role of a core material of the concrete main body 21. In the first embodiment, the reinforcing member 30 is formed of, for example, a plurality of reinforcing bars (linear reinforcing materials), specifically, a plurality of main reinforcing bars (reinforcing bars, linear reinforcing materials) 33 and a plurality of band bars (reinforcing bars, linear reinforcing materials). (Linear reinforcing material) 34 and.

A part of each of the plurality of main bars 33 is buried in the foundation surface 5. The other portion of each of the plurality of main bars 33 extends from the foundation surface 5 in the D1 direction. When viewed in a plan view along the D1 direction, the plurality of main bars 33 are arranged at predetermined intervals from each other so as to trace the contour of the concrete structure 10 inside the contour of the concrete structure 10. Hereinafter, the case of viewing along the D1 direction is simply described as "planar view", and the case of viewing from a direction intersecting the Z direction such as a case of viewing from the D2 direction or the D3 direction is simply described as "side view". In some cases.

Each of the plurality of band bars 34 is arranged so as to connect and support the plurality of main bars 33 at different positions in the D1 direction. The plurality of band bars 34 are arranged at predetermined intervals in the D1 direction (see FIG. 3). That is, each of the plurality of band bars 34 extends in a direction different from that of each of the plurality of main bars 33, and intersects each of the plurality of main bars 33.

The fixing member 40 is arranged at least at a position different from that of the reinforcing member 30, and in the first embodiment, it is arranged in a region surrounded by a plurality of main bars 33 and band bars 34 in a plan view. As shown in FIG. 2, the fixing member 40 extends in a straight line along the D2 direction, and further extends in the Z direction from the foundation surface 5. When it is difficult for the fixing member 40 to stand on the foundation surface 5 independently, it may be supported by the main bar 33 or the band bar 34 by a restraining member or the like (not shown).

The fixing member 40 is a member that fixes the concrete fluid injected from the injection nozzle of the additional manufacturing apparatus to itself. “Fixing to itself” means that at least a part of the concrete fluid ejected from the injection nozzle of the additional manufacturing apparatus toward the fixing member 40 first adheres to the surface or the like of the fixing member 40, and then the concrete adhered to the surface or the like. This means that the concrete fluid that is subsequently ejected from the injection nozzle can be laminated on the fluid.

The fixing member 40 is formed of, for example, a plate-shaped net-like body 41. As shown in FIG. 3, a plurality of holes H are formed in the reticulated body 41. The hole H has an area smaller than the area of the gap (gap between the reinforcing bars) S between the plurality of main bars 33 and the plurality of band bars 34 in contact with each other. When viewed from the D3 direction, the area of the hole H is considerably smaller than the area of the gap S, and most of the concrete fluid injected from the injection nozzle of the additional manufacturing apparatus with respect to the network 41 is fixed to the network 41 itself. Is set as appropriate.

The net-like body 41 is a member in which a thread-like material made of an arbitrary material is roughly woven so as to form holes H, and is, for example, a wire mesh, a continuous fiber sheet, a mesh material made of fiber reinforced plastic, or the like. The reinforcing bars of the reinforcing member 30 are members that are combined so that a plurality of main bars 33 and band bars 34, which are different members, are in contact with each other, whereas the net-like body 41 is a combination of a plurality of knitted thread-like materials. It is a member.

[Concrete structure construction method]
The concrete structure construction method of the first embodiment is a method of constructing the concrete structure 10 described above, and includes at least a laminate forming step and a concrete structure forming step.

First, as shown in FIG. 3, a plurality of main bars 33 are arranged on the foundation surface 5 at predetermined intervals in the D2 direction or the D3 direction and in accordance with the shape of the concrete structure 10. A plurality of band bars 34 are arranged so as to connect the plurality of main bars 33 at each of a plurality of predetermined positions in the D1 direction. Subsequently, the reticulated body 41 is arranged so as to extend in the D2 direction in the region surrounded by the plurality of main bars 33 in a plan view and to extend in the Z direction with respect to the foundation surface 5 when viewed from the D3 direction. When it is difficult for the net-like body 41 to stand on its own, the end portion of the net-like body 41 in the D2 direction is connected to the main bar 33 or the band bar 34 with a restraint member (not shown) or the like, if necessary.

Next, as shown in FIG. 4, in the laminate forming step, the concrete fluid 121 is ejected from the injection nozzle 111 of the additional manufacturing apparatus 101 onto the net-like body (fixing member) 41, and the laminate 130 shown in FIG. 5 is formed. Form. The injection nozzle 111 is attached to, for example, a robot arm 110 capable of being moved or automatically traveled by remote control. In the drawings including FIG. 4, only the injection nozzle 111 and the robot arm 110 of the additional manufacturing apparatus 101 are shown. The configuration of the additional manufacturing apparatus 101 is not particularly limited. Further, at least one of the additional manufacturing device 101 and the robot arm 110 may be capable of moving or automatically traveling by remote control, and both the additional manufacturing device 101 and the robot arm 110 may be capable of moving or automatically traveling by remote control. There may be.

The injection nozzle 111 injects the concrete fluid 121 in a predetermined direction by a so-called spraying method. For example, a plurality of injection holes (not shown) are formed in the injection nozzle 111. Fine-grained concrete fluid 121 is injected from the plurality of injection holes rather than the concrete fluid laminated by the so-called laminating method.

The concrete fluid 121 injected from the injection nozzle 111 generally passes through the plurality of main bars 33 and the plurality of band bars 34. A part of the concrete fluid 121 that has passed through the plurality of main bars 33 and the plurality of band bars 34 adheres to the surface of the thread-like material of the network body 41, and the rest passes through the holes H of the network body 41. As the injection time for a certain region of the network 41 elapses, the amount of the concrete fluid 121 laminated on the concrete fluid adhering to the network 41 increases, and the amount of the concrete fluid 121 passing through the hole H decreases. In this way, the concrete fluid 121 injected from the injection nozzle 111 is fixed to the net-like body 41. The laminated body 130 illustrated in FIG. 4 and the laminated body 132 illustrated in FIG. 5 are objects in which the concrete fluid 121 is fixed and laminated on the net-like body 41.

Next, in the concrete structure forming step, the concrete fluid 121 is injected from the injection nozzle 111 onto the laminated body 130, and the concrete structure 10 is formed while being reinforced by the main bar 33 and the band bar 34. Specifically, while the concrete fluid 121 injected from the injection nozzle 111 is laminated on the laminate 130, the concrete fluid 121 is sprayed onto another region on the network 41 to grow the laminate 130. When the laminated body 130 is grown, the main bar 33 and the band bar 34 are included. As a result, as shown in FIG. 5, the main bar 33 and the band bar 34 are buried in the laminated body 132 in which the laminated body 130 has grown, and the laminated body 132 is reinforced.

The concrete structure 10 is an object in which a concrete fluid 121 is further laminated on the laminated bodies 130 and 132. However, if only the concrete fluid 121 is laminated, the surface of the concrete structure 10 may become rough. Therefore, in the first embodiment, the concrete fluid 122 is injected from the injection nozzle 102, which is different from the injection nozzle 111, following the portion where the concrete fluid 121 is sprayed from the injection nozzle 111.

The injection nozzle 102 is formed with a plurality of injection holes (not shown) that are finer than the injection holes of the injection nozzle 111. Therefore, the concrete fluid 122 is finer than the concrete fluid 121. While spraying the concrete fluid 122 on the outside of the laminated body 132, the laminated body 132 is formed so as to include all the main bar 33, the band bar 34, and the net-like body 41, and has the same shape as the outer shape of the concrete structure 10. The laminate 132 is formed. When the injection nozzle 102 is used, the concrete on the outer peripheral portion of the laminated body 132 and the concrete structure 10 becomes finer than the concrete on the inner peripheral portion in a plan view.

Subsequently, the concrete fluids 121 and 122 are left to stand for a predetermined time and hardened to form a concrete structure 10.

According to the concrete structure 10 and the construction method of the concrete structure of the first embodiment described above, the concrete structure 10 is automatically mounted by using the spraying method of the additional manufacturing apparatus 101 capable of moving and automatically traveling by remote control. It becomes possible to manufacture concretely. In the concrete structure 10 and the concrete structure construction method of the first embodiment, it is necessary to assemble the scaffold in advance or dismantle the scaffold after the completion of the concrete structure 10, as in the case of the conventional concrete structure construction. No. Further, the concrete structure 10 can be constructed even at night when the worker is resting, in a place where the worker is difficult to work, in an environment, or the like, and the productivity of the concrete structure 10 can be increased.

In the concrete structure 10 and the construction method of the concrete structure of the first embodiment, the reinforcing member 30 is formed by a plurality of main bars 33 and a plurality of band bars 34. In the concrete structure forming step of the concrete structure construction method of the first embodiment, the concrete structure 10 is formed while filling the plurality of main bars 33 and the plurality of band bars 34 with the concrete fluid 121. Therefore, according to the concrete structure 10 and the construction method of the concrete structure, it is possible to easily prepare the reinforcing member 30 by using a plurality of reinforcing bars without using a special member or the like.

In the concrete structure 10 and the construction method of the concrete structure of the first embodiment, the fixing member 40 is formed of the net-like body 41. In the laminate forming step of the method for constructing a concrete structure of the first embodiment, the concrete fluid 121 is ejected from the injection nozzle 111 of the additional manufacturing apparatus 101 onto the network 41 to form the laminates 130 and 132. Therefore, according to the concrete structure 10 and the construction method of the concrete structure, the laminated body 130 can be formed first, and the concrete structure 10 can be efficiently formed with the laminated body 130 as a foundation. Further, according to the concrete structure 10 and the construction method of the concrete structure, it is possible to easily prepare the fixing member 40 by using the net-like body 41 without using a special member or the like.

It should be noted that FIG. 2 shows that the reticulated body 41 extends in a straight line along the D2 direction in the region surrounded by the plurality of main bars 33 and the band streaks 34 in a plan view. The shape and arrangement can be changed as appropriate. Further, the reticulated body 41 may be arranged only in a region lower than the plurality of main bars 33 in the D3 direction, and may have a minimum size capable of forming the laminated body 130.

For example, as a first modification of the first embodiment, as shown in FIG. 6, the reticulated body 41 is formed in both the D2 direction and the D3 direction in a region surrounded by a plurality of main bars 33 and band bars 34 in a plan view. It may extend in a straight line along the direction of inclination. Even when the reticulated body 41 is arranged in this way, the same effect as that of the first embodiment can be obtained, and the length of the reticulated body 41 in a plan view can be secured.

For example, as a second modification of the first embodiment, as shown in FIG. 7, the reticulated body 41 is curved in a region surrounded by a plurality of main bars 33 and band bars 34 in a plan view, and is curved in the D2 direction. It may meander. Even when the reticulated body 41 is arranged in this way, the same effect as that of the first embodiment can be obtained, and the length of the reticulated body 41 in a plan view can be secured. When the reticulated body 41 is curved, when the concrete fluid 121 is injected from the injection nozzle 111 of the additional manufacturing apparatus 101 toward the convex portion, the concrete fluid 121 is suppressed from scattering and the concrete fluid 121 is suppressed. It is possible to increase the degree of fixation of concrete.

For example, as a third modification of the first embodiment, as shown in FIG. 8, the reticulated body 41 radiates from a predetermined center position C in a region surrounded by a plurality of main bars 33 and band bars 34 in a plan view. It may be extended, and as an example, it may be extended from the center position C in a total of four directions in the direction opposite to the D2 direction and the D2 direction and the direction opposite to the D3 direction and the D3 direction. Even when the reticulated body 41 is arranged in this way, the same effect as that of the first embodiment can be obtained, and the laminated surface 50 of the reticulated body 41 in a plan view can be widely secured. Further, even when the net-like body 41 is arranged in this way, the concrete fluid 121 is jetted from the injection nozzle 111 of the additional manufacturing apparatus 101 toward the region sandwiched between the net-like bodies 41 adjacent to each other in the circumferential direction when viewed from the Z direction. At that time, it is possible to suppress the scattering of the concrete fluid 121 and increase the degree of fixation of the concrete fluid 121.

For example, as a fourth modification of the first embodiment, as shown in FIG. 9, the angle of arrangement of the network body 41 shown in FIG. 8 in a plan view is rotated, and the network body 41 moves from the center position C to the D2 direction and D3. It may extend in a total of four directions that are inclined with respect to both directions. Even when the reticulated body 41 is arranged in this way, the same effect as that of the third modification can be obtained.

Further, as a fifth modification of the first embodiment, as shown in FIG. 10, the reticulated body 41 is arranged in a frame shape on the outer side in the radial direction of the plurality of main bars 33 and the plurality of band bars 34 in a plan view. May be good. Even when the reticulated body 41 is arranged in this way, the same effect as that of the first embodiment can be obtained, and the laminated surface 50 of the reticulated body 41 can be widely secured. When the reticulated body 41 is arranged in this way, for example, in the layered body forming step, a frame-shaped laminated body is formed on the outside of the plurality of main bars 33 and the plurality of band bars 34 in a plan view. Therefore, after the laminated body is cured, the concrete fluid 121 may flow into the region shown by the alternate long and short dash line in FIG. 10 to form the concrete structure 10.

Further, in the first embodiment and each modification, the number and arrangement of the main bar 33 and the band bar 34 can be appropriately changed according to the shape of the concrete structure 10. The reinforcing member 30 is not limited to the reinforcing bar including the main bar 33 and the band bar 34, and may be formed of various metal materials, continuous fibers, fiber reinforced plastic (FRP), or the like.

(Second Embodiment)
Next, the configuration of the concrete structure of the second embodiment according to the present invention and the construction method of the concrete structure will be described. In the following description of the configuration of the concrete structure and the construction method of the concrete structure of the second embodiment, the contents different from the configuration of the concrete structure 10 of the first embodiment and the construction method of the concrete structure will be described. , The content overlapping with the configuration of the concrete structure 10 of the first embodiment and the construction method of the concrete structure will be omitted.

As shown in FIG. 11, the concrete structure 12 of the second embodiment includes a concrete main body 21, a reinforcing member 30, and a fixing member 40, similarly to the concrete structure 10 of the first embodiment. However, in the second embodiment, the fixing member 40 is formed of a buried form (form) 45 having a laminated surface 50 arranged along the outer shape of the concrete structure 12. The embedded formwork 45 extends along, for example, the D1 direction in a plan view. The buried formwork 45 may be any one that can be used at the time of construction, and the type and material of the buried formwork 45 are not particularly limited.

The concrete structure construction method of the second embodiment is a method of constructing the concrete structure 12, and includes the laminate forming step and the concrete structure forming step described in the first embodiment. Although not shown, in the layered body forming step of the construction method of the concrete structure of the second embodiment, the concrete fluid 121 is applied to the laminated surface 50 of the buried form 45 from the injection nozzle 111 of the additional manufacturing apparatus 101. Inject. As a result, the concrete fluid 121 is laminated on the laminated surface 50 to form a laminated body. The stacking direction of the concrete fluid 121 includes not only the D3 direction but also an arbitrary direction including the D2 direction intersecting the laminated surface 50 as in the second embodiment.

According to the concrete structure 12 and the concrete structure construction method of the second embodiment described above, the concrete structure 12 can be automatically manufactured as in the first embodiment. In the concrete structure 12 and the concrete structure construction method of the second embodiment, it is necessary to assemble the scaffold in advance or dismantle the scaffold after the completion of the concrete structure 12, as in the case of the conventional concrete structure construction. No. Further, the concrete structure 12 can be constructed even at night when the worker is resting, in a place where the worker is difficult to work, in an environment, etc., and the productivity of the concrete structure 12 can be increased.

In the concrete structure 12 and the concrete structure construction method of the second embodiment, the fixing member 40 is formed by the buried formwork 45. In the laminated body forming step of the method for constructing a concrete structure of the second embodiment, the concrete fluid 121 is applied to the laminated surface 50 of the embedded form 45 from the injection nozzle 111 of the additional manufacturing apparatus 101 to form the laminated body. According to the method of constructing the concrete structure 12 and the concrete structure as in the first embodiment, the laminated body can be formed first, and the concrete structure 12 can be efficiently formed on the basis of the laminated body. Further, according to the concrete structure 12 and the construction method of the concrete structure, it can be easily prepared by using the buried formwork 45 without using a special member or the like as the fixing member 40.

Note that FIG. 11 shows that the buried formwork 45 extends in a straight line along the D3 direction outside the region surrounded by the plurality of main bars 33 and the band bars 34 in a plan view. The shape and arrangement of the 45 can be changed as appropriate. Further, the embedded formwork 45 may be arranged only in a region lower than the plurality of main bars 33 in the D3 direction, and may have a minimum size capable of forming a laminated body.

For example, as a first modification of the second embodiment, as shown in FIG. 12, a portion of the embedded formwork 45 extending in the D3 direction in a plan view and both ends of the portion in the D3 direction in a direction opposite to the D2 direction. It may further have an extending portion. Even when the embedded formwork 45 is arranged in this way, the same effect as that of the second embodiment can be obtained, and the laminated surface 50 can be widely secured. When the concrete fluid 121 is injected from the injection nozzle 111 of the additional manufacturing apparatus 101 toward the corner 48 of the buried form 45 in a plan view, the scattering of the concrete fluid 121 is suppressed and the degree of fixation of the concrete fluid 121 is suppressed. Can be enhanced.

For example, as a second modification of the second embodiment, as shown in FIG. 13, the embedded formwork 45 extends in a direction opposite to the D2 direction and a direction opposite to the D3 direction with the center position C as the connection position. May be good. Even when the embedded formwork 45 is arranged in this way, the same effect as that of the first modification can be obtained.

Further, as a third modification of the second embodiment, as shown in FIG. 14, the embedded formwork extends in a direction opposite to the D2 direction and a direction opposite to the D3 direction with the two corners 48 as connection positions. You may be. In the buried formwork 45 of the third modification of the second embodiment, a portion of the buried formwork 45 of the first modification of the second embodiment extending in the direction opposite to the D2 direction is extended to the end of the concrete main body 21. It's the same as the one. Even when arranged in this way, the same effect as that of the first modification of the second embodiment can be obtained, and the laminated surface 50 can be secured even wider than that of the first modification of the second embodiment.

In the second embodiment, a formwork generally used in construction may be used instead of the buried formwork 45, and the formwork may be removed after the concrete fluid 121 is completely hardened during the construction of the concrete structure 12. ..

Although the embodiments according to the present invention have been described in detail above, the present invention is not limited to the specific embodiments. Various modifications of the present invention may be made within the scope of the gist of the present invention described in the claims.

The shape of the concrete structure according to the present invention is not limited to a square columnar shape (square columnar shape) like the concrete structure 10, but may be a triangular columnar column, a hexagonal columnar column, or a columnar column. It may be a complicated shape having an arbitrary non-planar surface or the like.

Further, the reinforcing member of the concrete structure according to the present invention is not limited to the reinforcing bar such as the reinforcing member 30, and is formed of a linear reinforcing material made of various metal materials, continuous fibers, fiber reinforced plastic (FRP) or the like. May be good. The material of the linear reinforcing material is not particularly limited as long as it satisfies suitable conditions such as having a predetermined strength as the linear reinforcing material. Further, the reinforcing member may be modeled by the above-mentioned additional manufacturing apparatus.

Further, the injection nozzle 111 described above is not limited to the case where it is attached to the robot arm 110, and may be attached to, for example, a portal crane, a backhoe, or an attachment of various construction machines.

Further, in the concrete structure according to the present invention, when the fixing member extends radially from a predetermined center position in a plan view in a region surrounded by the reinforcing member, the number of fixing members extending from the predetermined center position is particularly limited. Not done. The number of fixing members extending from a predetermined center position is not limited to four or two as illustrated in each of the above-described embodiments, and may be three or five or more, and is free to match the shape of the concrete structure. Is set as appropriate.

Further, the concrete structure according to the present invention is not limited to a columnar body, and may be, for example, a beam or a wall member, and includes a wide range of structures that can be formed of concrete.

10, 12 Concrete structure 30 Reinforcing member 40 Fixing member 33 Main bar (reinforcing bar, linear reinforcing material)
34 Band reinforcement (reinforcing bar, linear reinforcement)
41 Reticulated body 45 Buried formwork 101 Additional manufacturing equipment 111 Injection nozzle 121 Concrete fluid 130, 132 Laminated body

Claims (11)

A laminate forming step of injecting a concrete fluid from an injection nozzle of an additional manufacturing apparatus onto a fixing member to form a laminate in which the concrete fluid is fixed and laminated on the fixing member.
A concrete structure in which the concrete fluid is further laminated on the laminate while the concrete fluid is injected from the injection nozzle onto the laminate and reinforced by a reinforcing member provided at a position different from the fixing member. The concrete structure forming process to be formed and
With,
Construction method of concrete structure. The reinforcing member is formed of a plurality of linear reinforcing materials extending in different directions from each other.
The fixing member is formed of a net-like body having holes having an area smaller than the area of the gap between the plurality of reinforcing bars.
In the concrete structure forming step, while filling the reinforcing bar with the concrete fluid, the concrete fluid forms the concrete structure laminated on the laminated body and the reinforcing member.
The method for constructing a concrete structure according to claim 1. The reinforcing member is formed of a plurality of reinforcing bars extending in different directions from each other.
The fixing member is formed of a formwork having a laminated surface arranged along the outer shape of the concrete structure.
In the laminated body forming step, the concrete fluid is applied to the laminated surface to form the laminated body in which the concrete fluid is laminated on the laminated surface.
The method for constructing a concrete structure according to claim 1. The concrete body, which is hardened by laminating the concrete fluid injected from the injection nozzle of the additional manufacturing equipment,
Reinforcing members buried inside the concrete body and
With,
Concrete structure. A fixing member which is arranged at a position different from the reinforcing member and which fixes the concrete fluid injected from the injection nozzle to itself is further provided.
The concrete structure according to claim 4. The reinforcing member is composed of a plurality of reinforcing bars extending in different directions from each other.
The fixing member is a net-like body in which holes having an area smaller than the area of the gaps between the plurality of reinforcing bars are formed.
The concrete structure according to claim 5. The reinforcing member is composed of a plurality of reinforcing bars extending in different directions from each other.
The fixing member is a formwork having a laminated surface arranged along the outer shape of the concrete structure.
The concrete structure according to claim 5. The fixing member extends in a straight line in a plan view in a region surrounded by the reinforcing member.
The concrete structure according to any one of claims 5 to 7. The fixing member is curved in a plan view in a region surrounded by the reinforcing member.
The concrete structure according to any one of claims 5 to 7. The fixing member extends radially from a predetermined center position in a plan view in a region surrounded by the reinforcing member.
The concrete structure according to any one of claims 5 to 7. The fixing member is arranged in a frame shape on the outer side in the radial direction of the reinforcing member in a plan view.
The concrete structure according to any one of claims 5 to 7.

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