Method for manufacturing concrete structure and concrete structure

Abstract

To improve the appearance of a concrete structure.SOLUTION: The manufacturing method of the concrete structure 100 includes a first step of placing a weir plate 81 on a first riser reinforcement (riser reinforcement 42) embedded in a foundation beam 20 and projecting upward from the foundation beam 20, a second step of constructing a slab (earthen floor slab 30) by placing concrete on the weir plate 81 after the first step, a third step of removing the weir plate 81 after the second step, and a fourth step of constructing an outer wall (wall 60) by placing the outer wall on the slab from above the foundation beam 20 after the third step.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing a concrete structure and a concrete structure. [Background technology]

[0002] In the case of reinforced concrete buildings, construction begins with the construction of foundations and underground beams, followed by the construction of columns, walls, and floor slabs. Construction is generally carried out by repeating a series of steps from the substructure to the superstructure, including reinforcing bars, assembling formwork, pouring concrete, curing, and removing formwork (see, for example, Patent Document 1).

[0003] 8 and 9 are cross-sectional views showing a schematic configuration of a conventional concrete pouring step for a foundation of a building. In the conventional concrete pouring process, as shown in Figure 8, side formwork 1a for underground beams 1 is assembled in a trench excavated in the ground, and bottom formwork 2a for slab 2 is laid in it. Next, concrete for underground beams 1 is poured inside side formwork 1a. Once the concrete for underground beams 1 has hardened, a water-stopping material 3 is installed on top of underground beam 1. Next, concrete for slab 2 is poured inside bottom formwork 2a. At this time, the top surface 2b of slab 2 is positioned higher than the ground surface GL. Next, once the concrete for the slab 2 has hardened, the outer peripheral side formwork 1a is dismantled and removed, as shown in FIG. 9. Next, a side formwork 5a for pouring concrete for the wall 5 is assembled on the top surface 2b of the slab 2. The side formwork 5a is installed so that the inner surface on the outer peripheral side of the side formwork 5a is flush with the side surface of the slab 2. Next, with a water-stop material 4 installed on the top surface 2b of the slab 2 and inside the side formwork 5a, the concrete for the wall 5 is poured inside the side formwork 5a and allowed to harden. At this time, a joint B1 is formed at the boundary between the slab 2 and the wall 5. The joint B1 is located above the ground level GL at a height H1 (e.g., 100 mm) from the ground level GL. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-202491 Summary of the Invention [Problem to be solved by the invention]

[0005] In the joint B1 formed by the conventional concrete pouring process, when concrete for the wall 5 is poured onto the slab 2, the lateral pressure of the concrete may push out the side formwork 5a, causing a step in the joint B1. In this case, because the joint B1 is located above the ground level GL, the step in the joint B1 is visible, which causes a problem of spoiling the aesthetic appearance.

[0006] An object of the present invention is to provide a method for manufacturing a concrete structure and a concrete structure that can improve the aesthetic appearance of the concrete structure. [Means for solving the problem]

[0007] Hereinafter, ordinal numbers such as "first" or "second" placed before an object are used to distinguish that object from other objects. Ordinal numbers do not specify the superiority, order, or rank of the object to which they are placed.

[0008] In order to solve the above problems, the invention described in claim 1 is a method for manufacturing a concrete structure 100, for example, as shown in Figs. 3 to 6, A first step of leaning a dam plate 81 against a first upright reinforcing bar (upright reinforcing bar 42) embedded in a reinforced concrete foundation beam 20 constructed in a depression in the ground and protruding upward from the foundation beam 20; a second step of constructing a slab (earth floor slab 30) by pouring concrete on the opposite side of the first upright reinforcing bar with respect to the dam plate 81 after the first step; a third step of removing the dam plate 81 after the second step; A fourth step of constructing the exterior wall (wall 60) after the third step by placing the exterior wall (wall 60) on the slab from above the foundation beam 20 and embedding the first vertical reinforcing bars in the exterior wall; Includes:

[0009] According to claim 1, the joint (construction joint B2) between the exterior wall (wall 60) and the foundation beam 20 can be placed in a recess in the ground, so the construction joint B2 can be hidden by the ground. This improves the aesthetic appearance of the concrete structure 100, and enhances the design of the concrete structure 100. In addition, there is no need to perform a foundation baseboard finish by applying a finish coat to the joint B2 between the foundation beam 20 and the wall 60. Furthermore, even if a step occurs at the joint B2 between the foundation beam 20 and the wall 60, joint processing to eliminate the step is not required. Furthermore, by erecting the exterior wall (wall 60) not only on the foundation beams 20 but also on the slab (floor slab 30) from above the foundation beams 20, a sufficient covering thickness can be ensured from the indoor surface of the exterior wall (wall 60) to the first vertical reinforcing bar (vertical reinforcing bar 42). This makes it possible to suppress corrosion of the first vertical reinforcing bar (vertical reinforcing bar 42) over time.

[0010] The invention described in claim 2 is a method for manufacturing a concrete structure 100, for example, as shown in FIGS. 3 to 5, A fifth step before the second step is to sandwich a spacer 82 between the first vertical reinforcing bar (vertical reinforcing bar 42) and the dam plate 81; a sixth step of removing the spacer 82 after the second step and before the third step; Further includes:

[0011] According to claim 2, a gap can be formed between the upright reinforcing bar 42 and the barrier plate 81 by the spacer 82. This prevents the weir plate 81 from becoming stuck due to the pressure of the slab concrete 31 when the slab concrete 31 of the earthen floor slab 30 is poured. Furthermore, if the spacer 82 is removed from between the dam plate 81 and the upright reinforcing bar 42 before removing the dam plate 81, the dam plate 81 can be easily peeled off from the slab concrete 31.

[0012] The invention described in claim 3 is a method for manufacturing a concrete structure 100, for example, as shown in FIG. The method further includes, after the fourth step, a step of burying a joint (construction joint B2) between the exterior wall (wall 60) and the foundation beam 20 on the exterior surface of the exterior wall in soil outdoors.

[0013] According to claim 3, the joint B2 can be hidden from view by the ground, which improves the aesthetic appearance of the concrete structure 100 and enhances the design of the concrete structure 100. In addition, there is no need to perform a foundation baseboard finish by applying a finish coat to the joint B2 between the foundation beam 20 and the wall 60. Furthermore, even if a step occurs at the joint B2 between the foundation beam 20 and the wall 60, joint processing to eliminate the step is not required.

[0014] The invention described in claim 4 is a method for manufacturing a concrete structure 100, for example, as shown in FIGS. 5 and 6, The fourth step is A process of arranging a first wall reinforcement on the foundation beam 20 and connecting the first wall reinforcement and the first vertical reinforcing bar (vertical reinforcing bar 42); a step of assembling a first side formwork (peripheral formwork 60a) so as to stand on the foundation beam 20 along the first wall reinforcement; a step of assembling a second side formwork (inner perimeter formwork 60b) so as to stand on the slab (earth floor slab 30) along the first wall reinforcement; A pouring step of pouring concrete (wall concrete 61) between the first side formwork and the second side formwork; It has.

[0015] According to claim 4, the first upright reinforcing bars (upright reinforcing bars 42) can enhance the bond between the foundation beams 20 and the exterior wall (wall 60). This allows the foundation beams 20 and the exterior wall (wall 60) to be firmly connected.

[0016] The invention described in claim 5 is a method for manufacturing a concrete structure 100, for example, as shown in FIGS. 5 and 6, The fourth step further includes a step of arranging second wall reinforcement on the slab (floor slab 30) and connecting the second wall reinforcement to a second vertical reinforcement (vertical reinforcement 40) that is embedded in the foundation beam 20 and the slab and protrudes upward from the slab on the inside of the first vertical reinforcement (vertical reinforcement 42), In the concrete pouring step, the second wall reinforcement and the second upright reinforcement are embedded in the exterior wall (wall 60).

[0017] According to claim 5, the second upright reinforcing bars (upright reinforcing bars 40) can improve the bond between the foundation beams 20, the slab (earth floor slab 30), and the exterior wall (wall 60). This allows the foundation beams 20, the slab (earth floor slab 30), and the exterior wall (wall 60) to be firmly joined together.

[0018] The invention described in claim 6 is a method for manufacturing a concrete structure 100, for example, as shown in FIGS. 1 and 5, The method further includes a step of installing a waterproofing material 70 at the joint (construction joint B2) between the exterior wall (wall 60) and the foundation beam 20 after the third step and before the fourth step.

[0019] According to claim 6, a waterproofing material 70 can be installed at the boundary between the foundation beam 20 and the wall 60. This ensures a waterproof effect against water entering from the outside through the boundary between the foundation beam 20 and the wall 60.

[0020] The invention described in claim 7 is a method for manufacturing a concrete structure 100, for example, as shown in FIGS. 3 and 4, The method further includes, before the second step, a step of horizontally bending the insert bars 50 embedded in the foundation beams 20 and protruding upward from the foundation beams 20 inward, In the second step, the horizontally bent portion of the insert bar 50 is embedded in the slab (earth floor slab 30).

[0021] According to claim 7, the insert bars 50 can improve the bond between the foundation beams 20 and the slab (earth floor slab 30). This allows the foundation beams 20 and the slab (earth floor slab 30) to be firmly connected.

[0022] The invention described in claim 8 is a concrete structure 100, for example, as shown in FIG. 1, a reinforced concrete foundation beam 20 buried underground; A reinforced concrete exterior wall (wall 60) constructed on the foundation beam 20; A reinforced concrete slab (earth floor slab 30) constructed on the foundation beam 20 on the indoor side of the outdoor surface of the exterior wall; a first vertical reinforcing bar (vertical reinforcing bar 42) embedded in the foundation beam 20 and extending from the foundation beam 20 to the exterior wall and embedded in the exterior wall; The exterior wall is placed on top of the foundation beam 20 and then on top of the slab, and is erected on top of the foundation beam 20 and the slab, the first erection steel bar extends from the foundation beam 20 to the exterior wall on the outdoor side of the outdoor end of the slab, and the joint (joint B2) between the exterior wall and the foundation beam 20 on the outdoor surface of the exterior wall is located below ground level.

[0023] According to claim 8, the joint B2 can be hidden from view by the ground, which improves the aesthetic appearance of the concrete structure 100 and enhances the design of the concrete structure 100. In addition, there is no need to perform a foundation baseboard finish by applying a finish coat to the joint B2 between the foundation beam 20 and the wall 60. Furthermore, even if a step occurs at the joint B2 between the foundation beam 20 and the wall 60, joint processing to eliminate the step is not required. Furthermore, by erecting the exterior wall (wall 60) not only on the foundation beams 20 but also on the slab (floor slab 30) from above the foundation beams 20, a sufficient covering thickness can be ensured from the indoor surface of the exterior wall (wall 60) to the first vertical reinforcing bar (vertical reinforcing bar 42). This makes it possible to suppress corrosion of the first vertical reinforcing bar (vertical reinforcing bar 42) over time.

[0024] The invention described in claim 9 is a concrete structure 100, for example, as shown in FIG. A waterproof material 70 is provided at the joint (joint portion B2).

[0025] According to claim 9, the waterproof material 70 can be installed at the boundary between the foundation beam 20 and the wall 60. This ensures a waterproof effect against water entering from the outside through the boundary between the foundation beam 20 and the wall 60.

[0026] The invention described in claim 10 is a concrete structure 100, for example, as shown in FIG. The first upright reinforcing bar (upright reinforcing bar 42) extends above the slab (earthen floor slab 30) inside the exterior wall (wall 60).

[0027] According to claim 10, the dam plate 81 for forming the slab (earth floor slab 30) can be reliably installed along the first upright reinforcing bar (upright reinforcing bar 42). This allows the slab (earth floor slab 30) to be formed stably.

[0028] The invention described in claim 11 is a concrete structure 100, for example, as shown in FIG. 7, The slab (earthen floor slab 30) has slab reinforcement embedded therein, and the slab reinforcement is bent under the exterior wall (wall 60) and extends from the slab to the exterior wall.

[0029] According to claim 11, the slab reinforcement can enhance the bond between the slab (earthen floor slab 30) and the exterior wall (wall 60). This allows the slab (earth floor slab 30) and the exterior wall (wall 60) to be firmly joined together.

[0030] The invention described in claim 12 is a concrete structure 100, for example, as shown in FIG. 1, The structure is provided with a second vertical reinforcing bar (vertical reinforcing bar 40) that is embedded in the foundation beam 20, extends from the foundation beam 20 through the slab (earthen floor slab 30) to the exterior wall (wall 60), and is embedded in the slab and the exterior wall.

[0031] According to claim 12, the second upright reinforcing bars (upright reinforcing bars 40) can improve the bond between the foundation beams 20, the slab (earth floor slab 30), and the exterior wall (wall 60). This allows the foundation beams 20, the slab (earth floor slab 30), and the exterior wall (wall 60) to be firmly joined together.

[0032] The invention described in claim 13 is a concrete structure 100, for example, as shown in FIG. 1, The foundation beams 20 and the slab (earth floor slab 30) are embedded with insert bars 50 that extend upward from the foundation beams 20 to the slab and are bent horizontally in the slab.

[0033] According to claim 13, the insert bars 50 can enhance the bond between the foundation beams 20 and the slab (earth floor slab 30). This allows the foundation beams 20 and the slab (earth floor slab 30) to be firmly connected. [Effects of the Invention]

[0034] According to the present invention, the aesthetic appearance of a concrete structure can be improved. [Brief explanation of the drawings]

[0035] [Figure 1] FIG. 2 is a vertical cross-sectional view of the outer periphery of a concrete structure. [Figure 2] FIG. 1 is an explanatory diagram of a method for manufacturing a concrete structure. [Figure 3]FIG. 1 is an explanatory diagram of a method for manufacturing a concrete structure. [Figure 4] FIG. 1 is an explanatory diagram of a method for manufacturing a concrete structure. [Figure 5] FIG. 1 is an explanatory diagram of a method for manufacturing a concrete structure. [Figure 6] FIG. 1 is an explanatory diagram of a method for manufacturing a concrete structure. [Figure 7] FIG. 2 is a vertical cross-sectional view of the outer periphery of a concrete structure. [Figure 8] FIG. 1 is an explanatory diagram of a conventional concrete pouring process. [Figure 9] FIG. 1 is an explanatory diagram of a conventional concrete pouring process. DETAILED DESCRIPTION OF THE INVENTION

[0036] Hereinafter, embodiments will be described with reference to the drawings. Features and technical effects of the embodiments will be understood from the following detailed description and drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. Because the drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the examples in the drawings.

[0037] FIG. 1 is a vertical cross-sectional view of the outer periphery of a concrete structure 100 according to this embodiment. The concrete structure 100 constitutes the lower part of the building, more specifically the foundation and the first floor of the building.

[0038] As shown in FIG. 1, a reinforced concrete structure 100 is constructed underground on a crushed stone layer 11 and basal concrete 12 which are piled up vertically from the bottom up. The concrete structure 100 includes a pressure plate 13, a foundation beam 20, a slab 30, a plurality of vertical reinforcing bars 40, a plurality of vertical reinforcing bars 42, a plurality of insert bars 50, a wall 60, and a water-stop material 70. The pressure plate 13, the foundation beam 20, the slab 30, and the wall 60 are integrally constructed.

[0039] The pressure plate 13 is made of reinforced concrete and is constructed on a basal concrete 12.

[0040] The foundation beams 20 are provided on the pressure plate 13 along the outer periphery of the pressure plate 13 and extend in the circumferential direction along the outer periphery of the building. Note that the foundation beams 20 may be constructed on the heads of multiple piles in the ground, rather than on the pressure plate 13, or may be constructed between multiple footings constructed on the pile heads. The foundation beam 20 is made of reinforced concrete and is constructed integrally with the pressure plate 13.

[0041] The foundation beam 20 comprises a plurality of main reinforcements 22, a plurality of shear reinforcements 23, a plurality of web reinforcements 24, a plurality of width stop reinforcements 25 and beam concrete 21. The shear reinforcement bars 23 are bent into a rectangular shape. The shear reinforcement bars 23 are arranged at intervals in the horizontal direction. The main reinforcement bars 22 extend in the horizontal direction. The main reinforcement bars 22 are arranged at intervals along the shear reinforcement bars 23. These main reinforcement bars 22 are surrounded by the shear reinforcement bars 23. The web reinforcements 24 extend horizontally in parallel with the main reinforcements 22, and are arranged at intervals in the vertical direction along the shear reinforcement bars 23. The width stop reinforcements 25 extend horizontally perpendicular to the web reinforcements 24, and both ends thereof are hooked onto two web reinforcements 24, respectively. The assembly of the main reinforcement 22, shear reinforcement 23, web reinforcement 24 and width stop reinforcement 25 as described above is called a beam reinforcement assembly.

[0042] The lower parts of the main reinforcement bars 22 and shear reinforcement bars 23 of the lowest row and the row above are embedded in the outer periphery of the concrete of the pressure plate 13. The upper parts of the shear reinforcement bars 23 are embedded in the beam concrete 21, and the other main reinforcement bars 22, web reinforcement bars 24, and width stop bars 25 are also embedded in the beam concrete 21. The upper surface of the foundation beam 20, that is, the upper surface of the beam concrete 21, is located below the ground surface GL on the outer side of the outer peripheral surface 27 of the foundation beam 20.

[0043] Backfill soil 15 is piled on the pressure plate 13 inside the inner surface 26 of the foundation beam 20, and a crushed stone layer 14 is piled on top of the backfill soil 15.

[0044] The earthen floor slab 30 is a double-bar reinforced concrete slab. The floor slab 30 is provided on the foundation beams 20, inside the outer peripheral surfaces 27 of the foundation beams 20, and is joined to the foundation beams 20. The floor slab 30 extends horizontally from the inner peripheral surfaces 26 of the foundation beams 20 to the inside of the foundation beams 20, and the part of the floor slab 30 other than its outer peripheral portion is provided on the crushed stone layer 14. The outer peripheral portion of the floor slab 30 is located on the foundation beams 20, and is joined to the foundation beams 20 at this outer peripheral portion. The outer peripheral surface 34 of the earthen floor slab 30 is located a distance H3 inward from the outer peripheral surface 27 of the foundation beam 20. The outer peripheral surface 34 of the earthen floor slab 30 is joined to a wall 60, which will be described later.

[0045] The earthen floor slab 30 comprises a plurality of main reinforcements 32, a plurality of reinforcing bars 33, and slab concrete 31. The main reinforcements 32 are arranged in two rows, one above the other, at intervals in the horizontal direction. The main reinforcements 32 extend in the horizontal direction parallel to each other.

[0046] As shown in FIG. 7, the upper main reinforcement 32 may be bent upward inside the outer periphery of the earthen floor slab 30 and extend to the inside of the wall 60, so that the upper main reinforcement 32 is fixed to the wall concrete 61. This is particularly effective when the wall 60 is of a single-reinforcement type. In this case, since there are no internal rising reinforcements in the wall reinforcement assembly described below, the vertically bent portions of the upper main reinforcements 32 can be embedded in the wall concrete 61, thereby anchoring the vertically bent portions of the upper main reinforcements 32 to the wall concrete 61. This allows the slab 30 and the wall 60 to be firmly joined together.

[0047] The distribution reinforcement bars 33 are arranged in two rows, upper and lower, at intervals in the horizontal direction and in a direction perpendicular to the arrangement direction of the main reinforcement bars 32. The assembly of the upper row of multiple main reinforcements 32 and distribution reinforcements 33 is called the upper row slab reinforcement, and the assembly of the lower row of multiple main reinforcements 32 and distribution reinforcements 33 is called the lower row slab reinforcement. Note that the main reinforcements 32 and distribution reinforcements 33 may each be arranged in a single row instead of two rows, one above the other. In other words, the earthen floor slab 30 may be a single-reinforced concrete slab. The assembly of the main reinforcement 32 and distribution reinforcement 33 as described above is called a slab reinforcement assembly.

[0048] The slab reinforcement assembly is embedded in the slab concrete 31. The slab concrete 31 extends horizontally along the main reinforcement 32 and the distribution reinforcement 33, and has a thickness in the vertical direction. The backfill soil 15 and crushed stone layer 14 below the earthen floor slab 30 may be wholly or partially absent. In this case, the inside of the foundation beam 20 becomes hollow.

[0049] The wall 60 is an exterior wall made of double-reinforced concrete. Wall 60 is provided along the outer periphery of the building. Wall 60 is provided on top of foundation beams 20, and is provided by resting on top of the foundation beams 20 and on the outer periphery of floor slab 30. The outdoor side of wall 60 (outer periphery 64) is flush with outer periphery 27 of foundation beam 20. The indoor side of wall 60 (inner periphery 65) is located closer to the interior than outer periphery 27 of foundation beam 20, and is located closer to the exterior than inner periphery 26 of foundation beam 20.

[0050] The wall 60 comprises a plurality of vertical reinforcements 62, a plurality of horizontal reinforcements 63, and wall concrete 61. The vertical bars 62 extend in the vertical direction. The vertical bars 62 are arranged in two rows, one on the inside and one on the outside, at intervals in the horizontal direction. The horizontal bars 63 extend horizontally. The horizontal bars 63 are arranged in two rows, one on the inside and one on the outside, at intervals in the vertical direction along the vertical bars 62. The combination of multiple inner vertical reinforcements 62 and horizontal reinforcements 63 is called the inner wall reinforcement, and the combination of multiple outer vertical reinforcements 62 and horizontal reinforcements 63 is called the outer wall reinforcement. The inner wall reinforcement is the second wall reinforcement, and the outer wall reinforcement is the first wall reinforcement. The vertical reinforcement 62 and the horizontal reinforcement 63 may be arranged in one row each instead of two rows. In other words, the wall 60 may be a single-reinforced concrete wall. An assembly of the vertical reinforcement 62 and horizontal reinforcement 63 as described above is called a wall reinforcement assembly.

[0051] The vertical reinforcement 62 and the horizontal reinforcement 63 are embedded in the wall concrete 61 . The vertical reinforcement 62 is fixed to the upright reinforcement bars 40, 42. The wall concrete 61 extends along the vertical reinforcement 62 and the horizontal reinforcement 63, and has a thickness in the horizontal direction perpendicular to the vertical reinforcement 62 and the horizontal reinforcement 63. The lower end of the wall 60 abuts against the upper surface of the foundation beam 20, the outer surface 34 of the floor slab 30, and the upper surface of the floor slab 30, and the wall concrete 61 is formed in a stepped shape at the lower end of the wall 60.

[0052] The upright reinforcing bars 40 and 42 extend vertically and are arranged at intervals in the horizontal direction. The upright reinforcing bar 40 is located inside the upright reinforcing bar 42. The upright reinforcing bar 42 is the first upright reinforcing bar, and the upright reinforcing bar 40 is the second upright reinforcing bar. The upright reinforcing bars 40, 42 are fixed at their lower parts to the beam reinforcing bar assemblies of the foundation beams 20. The upper ends of the upright reinforcing bars 40, 42 are located above the top surface of the earthen floor slab 30. The upright reinforcing bars 42 are provided at positions spaced inward from the outer peripheral surface 27 of the foundation beam 20 by a distance H2. The upright reinforcing bars 42 are embedded in the beam concrete 21 of the foundation beam 20 and the wall concrete 61 of the wall 60. The vertical reinforcing bars 42 enhance the bond between the foundation beams 20 and the walls 60. The vertical reinforcing bars 42 may be connected to the outer vertical reinforcing bars 62 by lap joints, and the outer vertical reinforcing bars 62 may be fixed to the beam concrete 21 of the foundation beams 20 by the vertical reinforcing bars 42.

[0053] The vertical reinforcing bars 40 are embedded in the beam concrete 21 of the foundation beam 20 , the slab concrete 31 of the earthen floor slab 30 , and the wall concrete 61 of the wall 60 . The vertical reinforcing bars 40 enhance the bond between the foundation beams 20, the earthen floor slab 30, and the wall 60. The vertical reinforcing bars 40 may be connected to the inner vertical reinforcing bars 62 by lap joints, and the inner vertical reinforcing bars 62 may be fixed to the beam concrete 21 of the foundation beams 20 by the vertical reinforcing bars 40.

[0054] Horizontally extending cross bars 41 are arranged at intervals along the upright bars 40, 42.

[0055] The lower part of the insert bars 50 extends vertically and is bent inward inside the floor slab 30, with the bent part 50A extending horizontally. The lower part of the insert bars 50 is fixed to the beam bar assembly of the foundation beam 20, inside the upright reinforcing bars 40. The portions of the insert bars 50 extending in the vertical direction are embedded in the concrete beam 21. The portions of the insert bars 50 extending in the horizontal direction are embedded in the concrete slab 31. Horizontally extending cross bars 51 are arranged at intervals along the insert bars 50. The piercing bars 50 improve the bond between the foundation beams 20 and the slab 30. The piercing bars 50 may be connected to the lower main reinforcement bars 32 of the slab 30 by a lap joint, and the lower main reinforcement bars 32 may be fixed to the beam concrete 21 of the foundation beams 20 by the piercing bars 50.

[0056] The water-stopping material 70 is provided on the upper surface of the foundation beam 20 and in a position in contact with the outer peripheral surface 34 of the earthen floor slab 30. In other words, the water-stopping material 70 is installed in the joint B2 between the wall 60 and the foundation beam 20. The waterproof material 70 is embedded in the wall concrete 61.

[0057] 2 to 5 are explanatory diagrams for explaining a method for manufacturing a concrete structure 100 according to one embodiment of the present invention. A method for manufacturing the concrete structure 100 according to one embodiment of the present invention is as follows.

[0058] (1) A recess is excavated in the ground so that a part of the concrete structure 100 is buried therein. (2) As shown in FIG. 2, a layer of crushed stone 11 is laid at the bottom of the recess. (3) Pour concrete 12 onto the crushed stone layer 11 and allow it to harden.

[0059] (4) Place the steel bars of the pressure plate 13 on top of the concrete 12. (5) The multiple main reinforcements 22, multiple shear reinforcements 23, multiple web reinforcements 24, and multiple width stop reinforcements 25 of the foundation beam 20 are arranged to assemble the beam reinforcement assembly.

[0060] (6) The vertical reinforcing bars 40, 42 are assembled to the beam reinforcement assembly of the foundation beam 20, and the horizontal reinforcing bars 41 are arranged along the vertical reinforcing bars 40, 42. The upright reinforcing bar 42 is assembled to the beam reinforcing bar assembly of the foundation beam 20 at a distance H2 inward from the outer peripheral surface 27 of the foundation beam 20 to be cast later. When the wall 60 is of a single-reinforcement type, the upright reinforcing bars 40 are not installed in the step (6). (7) Insert bars 50 are attached to the beam reinforcement assembly of the foundation beam 20, and horizontal reinforcement bars 51 are arranged along the insert bars 50. At this point, the insert bars 50 have a linear shape.

[0061] (8) Assemble the pressure plate 13 and the outer peripheral formwork 20a for the foundation beam 20. The outer peripheral formwork 20a is a side formwork located on the outer peripheral side of the side formworks for the foundation beams 20. The outer peripheral formwork 20a is placed on the basing concrete 12 and on the outer peripheral side of the beam reinforcing bar assemblies and the standing reinforcing bars 42 of the foundation beams 20. (9) Concrete for the pressure plate 13 is poured into the outer peripheral formwork 20a and allowed to harden. As a result, the reinforcing bars of the pressure plate 13 and the lower part of the beam reinforcement assembly of the foundation beam 20 are embedded in concrete. Note that the assembly process of the upper part of the beam reinforcement assembly, the vertical reinforcing bars 40, 42, and the insert bars 50 may be carried out after the concrete of the pressure plate 13 has hardened and before step (10) described below.

[0062] (10) Assemble the inner peripheral formwork 20b for the foundation beam 20. The inner periphery formwork 20b is a side formwork located on the inside of the side formworks for the foundation beams 20. The inner periphery formwork 20b is placed on the pressure plate 13 and inside the beam reinforcing bar assemblies and the insert bars 50 of the foundation beams 20. The height of the upper ends of the outer peripheral formwork 20a and the inner peripheral formwork 20b is approximately the same as the height of the upper ends of the foundation beams 20 that will be cast later, and is lower than the ground surface GL. (11) Pour beam concrete 21 for the foundation beam 20 between the outer peripheral formwork 20a and the inner peripheral formwork 20b. As a result, the beam reinforcement assembly of the foundation beam 20, the lower parts of the vertical reinforcing bars 40, 42, and the lower parts of the insert bars 50 are embedded in the beam concrete 21. The upper parts of the vertical reinforcing bars 40, 42 and the insert bars 50 protrude vertically upward from the upper surface 21a of the beam concrete 21.

[0063] (12) After the beam concrete 21 has been cured and hardened, the outer peripheral formwork 20a and the inner peripheral formwork 20b are dismantled as shown in FIG. (13) On the outer periphery of the foundation beam 20, soil is backfilled up to a position that is a height H4 below the upper end of the foundation beam 20. On the inside of the foundation beam 20, on the pressure plate 13, soil is backfilled up to a position that is a height H4 below the upper end of the foundation beam 20. (14) On the inside of the foundation beam 20, crushed stone is laid on top of the backfilled soil 15 up to the height of the top end of the foundation beam 20. This results in the crushed stone layer 14 being piled on top of the soil 15. It is not necessary to backfill the soil or lay crushed stone inside the foundation beams 20. In this case, the bottom formwork for the earthen floor slab 30 is installed so as to be supported by shoring.

[0064] (15) Arrange the multiple main reinforcements 32 and multiple distribution reinforcements 33 of the floor slab 30 to assemble the slab reinforcement assembly. (16) Bend the insert bars 50 inward at a substantially right angle and fix the bent portions 50A to the slab reinforcement assembly. This fixes the slab reinforcement assembly to the beam reinforcement assembly of the foundation beam 20 via the insert bars 50.

[0065] (17) Install the weir board 81 to form the earthen floor slab 30. Specifically, on the foundation beams 20, the dam plate 81 is placed inside the arrangement of the upright reinforcing bars 42, and the spacer 82 is sandwiched between the dam plate 81 and the upright reinforcing bars 42, and the dam plate 81 is set up against the upright reinforcing bars 42. In other words, on the foundation beams 20, the dam plate 81 is installed along the inside of the upright reinforcing bars 42. The dam plate 81 is simply leaned against the upright reinforcing bars 42, and is not fixed to the upright reinforcing bars 42 or the foundation beams 20. The dam plate 81 is made of plywood, but may also be made of steel plate. A release agent may be applied to the surface of the dam plate 81 before or after installation. Since the upper end of the upright reinforcing bar 42 is located above the upper surface of the earthen floor slab 30 that will be poured later, the weir plate 81 can be reliably supported by the upright reinforcing bar 42. By supporting the dam plate 81 on the upright reinforcing bars 42 via the spacers 82, it is possible to prevent the dam plate 81 from becoming stuck due to the pressure of the slab concrete 31 when the slab concrete 31 of the earthen floor slab 30 is poured.

[0066] (18) As shown in FIG. 4, the slab concrete 31 of the earthen floor slab 30 is poured onto the foundation beams 20 and the crushed stone layer 14 and inside the dam plate 81. As a result, the slab reinforcing bar assembly of the earthen floor slab 30 and the bent portions 50A of the insert bars 50 are embedded in the slab concrete 31. The pressure of the slab concrete 31 presses the weir plate 81 and spacer 82 against the upright reinforcing bars 42, and the upright reinforcing bars 42 bear this pressure.

[0067] (19) After the slab concrete 31 has been cured and hardened, the barrier plates 81 and spacers 82 are removed as shown in FIG. If the spacer 82 is removed from between the dam plate 81 and the upright reinforcing bar 42 before removing the dam plate 81, the dam plate 81 can be easily peeled off from the slab concrete 31. (20) A waterproofing material 70 is placed on the upper surface of the foundation beam 20 and in a position in contact with the outer surface 34 of the earthen floor slab 30.

[0068] (21) Assemble the outer perimeter formwork 60a for the wall 60. The outer periphery formwork 60a is the first side formwork, and is the side formwork located on the outer periphery side of the side formworks for the wall 60. The outer periphery formwork 60a is positioned above the foundation beams 20 and on the outer periphery side of the upright reinforcing bars 42. The outer periphery formwork 60a is installed so that the outer periphery surface 64 of the wall 60, which will be cast later, is flush with the outer periphery surface 27 of the foundation beams 20. The assembly of the outer periphery formwork 60a may be carried out in parallel with the assembly of the inner periphery formwork 60b after the subsequent step (22). (22) Arrange multiple vertical reinforcements 62 and multiple horizontal reinforcements 63 of the wall 60 to assemble the wall reinforcement assembly and fix it to the upright reinforcing bars 40, 42.

[0069] (23) As shown in FIG. 6, an inner peripheral formwork 60b for the wall 60 is assembled. The inner perimeter formwork 60b is a second side formwork, and is a side formwork located on the inner side of the side formworks for the wall 60. The inner perimeter formwork 60b is placed on the earthen floor slab 30 and inside the upright reinforcing bars 40. The height of the upper ends of the outer peripheral formwork 60a and the inner peripheral formwork 60b is approximately the same as the height of the upper end of the wall 60 that will be cast later. (24) Wall concrete 61 for the wall 60 is poured between the outer peripheral formwork 60a and the inner peripheral formwork 60b and allowed to harden. As a result, the water-stopping material 70, the wall reinforcement assembly of the wall 60, and the portions of the upright reinforcing bars 40, 42 that are not embedded in the foundation beams 20 and the earthen floor slab 30 are embedded in the wall concrete 61. The design strength of the earthen floor slab 30 and the wall 60 is the same.

[0070] (25) As shown in FIG. 1, after the wall concrete 61 has hardened, the outer peripheral formwork 60a and the inner peripheral formwork 60b are dismantled. (26) Pile up soil on the outer periphery of the concrete structure 100 up to the ground level GL.

[0071] This completes the concrete structure 100. In the completed concrete structure 100, a joint B2 is formed at the boundary between the foundation beam 20 and the wall 60, as shown in FIG. Since the joint B2 is located below the ground surface GL, the joint B2 can be hidden from view by the ground, which improves the aesthetic appearance of the concrete structure 100 and enhances the design of the concrete structure 100.

[0072] As described above, the manufacturing method for the concrete structure 100 of this embodiment includes a first step of leaning a dam plate 81 against the first upright reinforcing bar (upright reinforcing bar 42) that is embedded in and protrudes upward from a reinforced concrete foundation beam 20 constructed in a depression in the ground on top of the foundation beam 20; a second step of constructing a slab (floor slab 30) by pouring concrete on the opposite side of the first upright reinforcing bar with respect to the dam plate 81 after the first step; a third step of removing the dam plate 81 after the second step; and a fourth step of constructing an exterior wall (wall 60) by placing the exterior wall on top of the slab from above the foundation beam 20 and embedding the first upright reinforcing bar in the exterior wall after the third step. This allows the joint (construction joint B2) between the exterior wall (wall 60) and the foundation beam 20 to be located in a recess in the ground, making it possible to hide the construction joint B2 from view due to the ground. This improves the aesthetic appearance of the concrete structure 100, and enhances the design of the concrete structure 100. In addition, there is no need to perform a foundation baseboard finish by applying a finish coat to the joint B2 between the foundation beam 20 and the wall 60. Furthermore, even if a step occurs at the joint B2 between the foundation beam 20 and the wall 60, joint processing to eliminate the step is not required. Furthermore, by erecting the exterior wall (wall 60) not only on the foundation beams 20 but also on the slab (floor slab 30) from above the foundation beams 20, a sufficient covering thickness can be ensured from the indoor surface of the exterior wall (wall 60) to the first vertical reinforcing bar (vertical reinforcing bar 42). Therefore, corrosion of the first vertical reinforcing bar (vertical reinforcing bar 42) over time can be suppressed.

[0073] In addition, the manufacturing method of the concrete structure 100 of this embodiment further includes a fifth step of sandwiching a spacer 82 between the first vertical reinforcing bar (vertical reinforcing bar 42) and the dam plate 81 before the second step, and a sixth step of removing the spacer 82 after the second step and before the third step. This allows the spacer 82 to form a gap between the upright reinforcing bar 42 and the dam plate 81. Therefore, when the slab concrete 31 of the earthen floor slab 30 is poured, it is possible to prevent the dam plate 81 from becoming stuck due to the pressure of the slab concrete 31. Furthermore, if the spacer 82 is removed from between the dam plate 81 and the upright reinforcing bar 42 before removing the dam plate 81, the dam plate 81 can be easily peeled off from the slab concrete 31.

[0074] In addition, the manufacturing method of the concrete structure 100 of this embodiment further includes, after the fourth step, a step of burying the joint (construction joint B2) between the exterior wall and the foundation beam 20 on the outdoor surface of the exterior wall (wall 60) in soil outdoors. This makes it possible to hide the joint B2 from view due to the ground, thereby improving the aesthetic appearance of the concrete structure 100 and enhancing the design of the concrete structure 100. In addition, there is no need to perform a foundation baseboard finish by applying a finish coat to the joint B2 between the foundation beam 20 and the wall 60. Furthermore, even if a step occurs at the joint B2 between the foundation beam 20 and the wall 60, joint processing to eliminate the step is not required.

[0075] In addition, in the manufacturing method of the concrete structure 100 of this embodiment, the fourth step includes a step of arranging the first wall reinforcement on the foundation beam 20 and joining the first wall reinforcement and the first vertical reinforcement (vertical reinforcement 42), a step of assembling the first side formwork (outer peripheral formwork 60a) to stand along the first wall reinforcement on top of the foundation beam 20, a step of assembling the second side formwork (inner peripheral formwork 60b) to stand along the first wall reinforcement on top of the slab (floor slab 30), and a pouring step of pouring concrete (wall concrete 61) between the first side formwork and the second side formwork. This allows the first upright reinforcing bars (upright reinforcing bars 42) to enhance the bond between the foundation beams 20 and the exterior wall (wall 60). Therefore, the foundation beams 20 and the exterior wall (wall 60) can be firmly joined together.

[0076] In addition, in the manufacturing method of the concrete structure 100 of this embodiment, the fourth step further includes a step of arranging the second wall reinforcement on the slab (floor slab 30) and connecting the second wall reinforcement to the second vertical reinforcement (vertical reinforcement 40) that is embedded in the foundation beam 20 and the slab inside the first vertical reinforcement (vertical reinforcement 42) and protrudes upward from the slab, and in the pouring step, the second wall reinforcement and the second vertical reinforcement are embedded in the exterior wall (wall 60). This allows the second upright reinforcing bars (upright reinforcing bars 40) to enhance the bond between the foundation beams 20, the slab (earth floor slab 30), and the exterior wall (wall 60). Therefore, the foundation beams 20, the slab (earth floor slab 30), and the exterior wall (wall 60) can be firmly joined together.

[0077] In addition, the manufacturing method of the concrete structure 100 of this embodiment further includes a step of installing a water-stopping material 70 at the joint (construction joint B2) between the exterior wall (wall 60) and the foundation beam 20 after the third step and before the fourth step. This allows the waterproof material 70 to be installed at the boundary between the foundation beam 20 and the wall 60. Therefore, a waterproof effect can be ensured against water infiltrating from the outside through the boundary between the foundation beam 20 and the wall 60.

[0078] In addition, the manufacturing method for the concrete structure 100 of this embodiment further includes, before the second step, a step of horizontally bending the insert bars 50 that are embedded in the foundation beams 20 and protrude upward from the foundation beams 20 inward, and in the second step, the horizontally bent portions of the insert bars 50 are embedded in the slab (floor slab 30). This allows the reinforcing bars 50 to enhance the connection between the foundation beams 20 and the slab (floor slab 30). Therefore, the foundation beam 20 and the slab (earth floor slab 30) can be firmly connected.

[0079] In addition, the concrete structure 100 of this embodiment comprises a reinforced concrete foundation beam 20 buried in the ground, a reinforced concrete exterior wall (wall 60) constructed on the foundation beam 20, a reinforced concrete slab (floor slab 30) constructed on the foundation beam 20 on the indoor side of the outdoor surface of the exterior wall, and a first vertical reinforcing bar (vertical reinforcing bar 42) embedded in the foundation beam 20 and extending from the foundation beam 20 to the exterior wall, wherein the exterior wall rests on top of the slab from above the foundation beam 20 and is erected on the foundation beam 20 and the slab, the first vertical reinforcing bar extends from the foundation beam 20 to the exterior wall on the outdoor side of the outdoor end of the slab, and the joint (joint B2) between the exterior wall and the foundation beam 20 on the outdoor surface of the exterior wall is located below ground level. This allows the joint B2 to be hidden from view by the ground. Therefore, the aesthetic appearance of the concrete structure 100 can be improved, and the design of the concrete structure 100 can be enhanced. In addition, there is no need to perform a foundation baseboard finish by applying a finish coat to the joint B2 between the foundation beam 20 and the wall 60. Furthermore, even if a step occurs at the joint B2 between the foundation beam 20 and the wall 60, joint processing to eliminate the step is not required. Furthermore, by erecting the exterior wall (wall 60) not only on the foundation beams 20 but also on the slab (floor slab 30) from above the foundation beams 20, a sufficient covering thickness can be ensured from the indoor surface of the exterior wall (wall 60) to the first vertical reinforcing bar (vertical reinforcing bar 42). This makes it possible to suppress corrosion of the first vertical reinforcing bar (vertical reinforcing bar 42) over time.

[0080] Furthermore, the concrete structure 100 of this embodiment includes a waterproofing material 70 installed at the joint (construction joint B2). This allows the waterproof material 70 to be installed at the boundary between the foundation beam 20 and the wall 60. Therefore, a waterproof effect can be ensured against water infiltrating from the outside through the boundary between the foundation beam 20 and the wall 60.

[0081] Furthermore, in the concrete structure 100 of this embodiment, the first upright reinforcing bars (upright reinforcing bars 42) extend above the slab (earthen floor slab 30) inside the exterior wall (wall 60). This allows the dam plate 81 for forming the slab (earth floor slab 30) to be securely installed along the first upright reinforcing bar (upright reinforcing bar 42). Therefore, the slab (earth floor slab 30) can be formed stably.

[0082] Furthermore, in the concrete structure 100 of this embodiment, the slab (earthen floor slab 30) has slab reinforcement embedded therein, and the slab reinforcement is bent under the exterior wall (wall 60) and extends from the slab to the exterior wall. This allows the slab reinforcement to enhance the bond between the slab (floor slab 30) and the exterior wall (wall 60). Therefore, the slab (earth floor slab 30) and the exterior wall (wall 60) can be firmly joined together.

[0083] In addition, the concrete structure 100 of this embodiment is provided with a second vertical reinforcing bar (vertical reinforcing bar 40) that is embedded in the foundation beam 20 and extends from the foundation beam 20 through the slab (floor slab 30) to the exterior wall (wall 60) and is embedded in the slab and the exterior wall. This allows the second upright reinforcing bars (upright reinforcing bars 40) to enhance the bond between the foundation beams 20, the slab (earth floor slab 30), and the exterior wall (wall 60). Therefore, the foundation beams 20, the slab (earth floor slab 30), and the exterior wall (wall 60) can be firmly joined together.

[0084] The concrete structure 100 of this embodiment also includes insert bars 50 that are embedded in the foundation beams 20 and the slab (earth floor slab 30), extend upward from the foundation beams 20 to the slab, and bend horizontally in the slab. This allows the reinforcing bars 50 to enhance the connection between the foundation beams 20 and the slab (floor slab 30). Therefore, the foundation beam 20 and the slab (earth floor slab 30) can be firmly connected.

[0085] Since the concrete structure 100 is made of reinforced concrete, a building including the concrete structure 100 has high earthquake resistance and a long lifespan. Therefore, a building including the concrete structure 100 contributes to achieving goals such as so-called "sustainable urban development" and "SDGs (Sustainable Development Goals)."

[0086] The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0087] 11,14 Crushed stone layer 12 Concrete 13 Pressure-resistant plate 15 Sat 20 Foundation beam 20a Periphery formwork 20b Inner formwork 21 Concrete beams 21a Top side 22 Main reinforcement 23 Shear reinforcement 24 Abs 25 Width stop bars 26 Inner surface 27 Outer surface 30 Earthen floor slab (slab) 31 Slab Concrete 32 Main reinforcement 33 Distribution reinforcement 34 Outer surface 40 Vertical rebar (second vertical rebar) 41 Horizontal stripes 42 Vertical rebar (first vertical rebar) 50 Insertion 50A bent part 51 Horizontal Stripes 60 Wall (outer wall) 60a Periphery formwork (first side formwork) 60b Inner formwork (second side formwork) 61 Wall Concrete 62 Vertical Stripes 63 Horizontal Strips 64 Outer surface 65 Inner surface 70 Water-stopping material 81 Dam board 82 spacer 100 Concrete Structures B1 Connection section B2 Connection part GL ground surface

Claims

1. a first step of placing a dam plate on a first upright reinforcing bar that is embedded in a reinforced concrete foundation beam constructed in a depression in the ground and protrudes upward from the foundation beam; a second step of constructing a slab by pouring concrete on the opposite side of the first upright reinforcing bar with respect to the weir plate after the first step; a third step of removing the dam plate after the second step; a fourth step of constructing the exterior wall after the third step by placing the exterior wall on the slab from above the foundation beam and embedding the first upright reinforcing bars in the exterior wall; A method for manufacturing a concrete structure comprising:

2. A fifth step of sandwiching a spacer between the first vertical reinforcing bar and the dam plate before the second step; a sixth step of removing the spacer after the second step and before the third step; The method for manufacturing a concrete structure according to claim 1 , further comprising:

3. 2. The method for manufacturing a concrete structure according to claim 1, further comprising the step of burying a joint between the exterior wall and the foundation beam on the exterior surface of the exterior wall in soil outdoors of the exterior wall after the fourth step.

4. The fourth step is A process of arranging a first wall reinforcement on the foundation beam and connecting the first wall reinforcement and the first vertical reinforcing bar; a step of assembling a first side formwork so as to stand it on the foundation beam along the first wall reinforcement; a step of assembling a second side formwork to stand on the slab along the first wall reinforcement; a pouring step of pouring concrete between the first side formwork and the second side formwork; The method for manufacturing a concrete structure according to claim 1, comprising:

5. The fourth step further includes a step of arranging a second wall reinforcement on the slab and connecting the second wall reinforcement to a second vertical reinforcement that is embedded in the foundation beam and the slab on the inside of the first vertical reinforcement and protrudes above the slab, The method for manufacturing a concrete structure according to claim 4, wherein the second wall reinforcement and the second upright reinforcement are embedded in the exterior wall in the casting step.

6. The method for manufacturing a concrete structure according to claim 1 , further comprising the step of installing a water-stop material in a joint between the exterior wall and the foundation beam after the third step and before the fourth step.

7. The method further includes, before the second step, a step of horizontally bending the insert bars embedded in the foundation beams and protruding upward from the foundation beams inward, 2. The method for manufacturing a concrete structure according to claim 1, wherein in the second step, the horizontally bent portion of the insert bar is embedded in the slab.

8. Reinforced concrete foundation beams buried underground; A reinforced concrete exterior wall constructed on the foundation beam; a reinforced concrete slab constructed on the foundation beam on the indoor side of the exterior wall; a first vertical reinforcing bar embedded in the foundation beam and extending from the foundation beam to the exterior wall and embedded in the exterior wall; A concrete structure in which the exterior wall rests on top of the foundation beam and then on top of the slab, and is erected on top of the foundation beam and the slab, the first upright reinforcing bar extends from the foundation beam to the exterior wall outside the outdoor end of the slab, and the joint between the exterior wall and the foundation beam on the outdoor surface of the exterior wall is located below ground level.

9. The concrete structure according to claim 8 , further comprising a water stop material installed in the joint.

10. 10. The concrete structure according to claim 8, wherein the first upright reinforcing bars extend above the slab inside the exterior wall.

11. 10. The concrete structure according to claim 8 or 9, wherein the slab has slab reinforcement embedded therein, the slab reinforcement being bent under the exterior wall and extending from the slab to the exterior wall.

12. 10. The concrete structure according to claim 8, further comprising a second upright reinforcing bar embedded in the foundation beam, extending from the foundation beam through the slab to the exterior wall, and embedded in the slab and the exterior wall.

13. 10. The concrete structure according to claim 8, further comprising: a pierced bar embedded in the foundation beam and the slab, extending upward from the foundation beam to the slab and bent horizontally in the slab.

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