Concrete structure having a residual formwork and construction method thereof

Abstract

To provide a concrete structure having a permanent form which can reduce the amount of components carried to a storage tank construction site, and to provide a construction method of the same.SOLUTION: In a concrete structure (11), a first form (61) provided on the surface of a concrete wall (12) and a second form (62) provided on the opposite side surface via the concrete wall (12) are integrated with the concrete wall (12) and remain. In the concrete structure (11), the first form (61) and the second form (62) have a cylindrical rib (61b) capable of fitting a pipe, and their materials and shapes are the same as those of a partition plate which constitutes horizontal connection bodies (22, 23, 24, 25) of a storage composite body (20) constructed on a base plate (13).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a concrete structure having a formwork for forming a concrete underground beam that supports the foundation part or underground part of a building, and a concrete wall of a storage tank that stores rainwater and the like, and a construction method thereof.

Background Art

[0002] Conventionally, there has been disclosed a remaining formwork provided for forming a concrete structure composed of a concrete side wall erected on the bottom of a hole dug in the ground or on a concrete chassis laid on the ground, and having a remaining formwork remaining on the surface of the side wall (see, for example, Patent Document 1 (Claim 1, Paragraph

[0012] , FIGS. 1 and 2)). In this remaining formwork, an inner formwork that forms the inner surface of the side wall, an outer formwork that forms the outer surface of the side wall, and a plurality of vertical reinforcing bars disposed between the inner formwork and the outer formwork and holding the outer formwork or the outer formwork and the inner formwork are provided. The outer formwork or the outer formwork and the inner formwork are formed of a plurality of substrates formed of plastic into a square plate shape and arranged in close contact with each other vertically and horizontally, a plurality of central part reinforcing plates formed of plastic into a square plate shape substantially the same size as the substrates, bonding four adjacent substrates, and arranged in close contact with each other vertically and horizontally, and a plurality of end reinforcing plates formed of plastic into a rectangular plate shape, located at the outer peripheral edge of the plurality of central part reinforcing plates arranged in close contact with each other vertically and horizontally, and bonding adjacent substrates and arranged in a square frame shape.

[0003] In the residual formwork configured as described above, an outer formwork or an outer formwork and an inner formwork that are self-supporting and strong can be easily assembled. As a result, even if a large amount of fresh concrete is poured at once between the inner formwork and the outer formwork, the outer formwork or the outer formwork and the inner formwork do not deform, and a concrete side wall of a predetermined shape can be formed. Further, since the substrate, the central reinforcing plate, and the end reinforcing plate are formed of plastic, the substrate, the central reinforcing plate, and the end reinforcing plate that constitute the outer formwork or the outer formwork and the inner formwork can be easily manufactured. Furthermore, if the substrate, the central reinforcing plate, and the end reinforcing plate are formed using waste plastic, the substrate, the central reinforcing plate, and the end reinforcing plate that constitute the outer formwork or the outer formwork and the inner formwork can be manufactured at low cost.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the residual formwork shown in the above Registered Utility Model Patent Document 1, a required quantity of a substrate formed of plastic in a square shape, a central reinforcing plate, and an end reinforcing plate for both the inner formwork and the outer formwork must be prepared respectively. The arrangement of parts is complicated, and there is a problem that this construction method cannot be carried out or may be delayed if there is no stock.

Means for Solving the Problems

[0006] A first aspect of the present invention is concrete that is erected on the bottom of a hole dug in the ground or on a chassis (13) laid on the ground Truss WallIt has (12), and a first formwork (61) provided on the surface of the concrete wall and a second formwork (62) provided on the opposite surface via the concrete wall (12) are integrated with the concrete wall (12) and remain as a concrete structure (11). The first formwork (61) and the second formwork (62) have cylindrical ribs (61b) into which pipes (65, 66) can be inserted, and are made of the same material and have the same shape as the partition plate (21) that constitutes the horizontal connectors (22, 23, 24, 25, 26) of the storage composite (20) constructed on the chassis (13). Spacers are arranged alternately in the vertical direction with the horizontal connectors (22, 23, 24, 25, 26). - At least a part of (28) is , which is used as part of the concrete wall forming members (91, 92) in combination with the cylindrical ribs (61b, 62b) It is characterized in that it utilizes the pipes (65, 66).

[0007] A second aspect of the present invention is an invention based on the first aspect, characterized in that a plurality of vertical reinforcing bars (81) and horizontal reinforcing bars (82) are inserted through insertion holes (44, 45) provided in a reinforcing bar fixing jig (40) engaged with the engaged holes (61k, 62k) of the first formwork (61) and the second formwork (62).

[0008] A third aspect of the present invention is an invention based on the first aspect, characterized in that the first formwork (61) and the second formwork (62) are connected by a separator (71).

[0009] A fourth aspect of the present invention is concrete erected on the bottom of a hole dug in the ground or on a chassis (13) laid on the ground Truss WallA concrete wall forming member construction step of constructing a concrete wall forming member for forming (12), and a concrete wall forming step of pouring fresh concrete between a first formwork (61) and a second formwork (62) of the concrete wall forming member and curing it to form the concrete wall (12), wherein the first formwork (61) and the second formwork (62) are integrated with the concrete wall (12) and remain as a concrete structure (11). The construction method includes a first concrete wall forming member construction step of fitting a first pipe (65) into a cylindrical rib (61b) of the first formwork (61) and fitting a cylindrical rib (63b) of a first support (63) to an end of the first pipe (65) to construct a first concrete wall forming member (91), and a second concrete wall forming member construction step of fitting a second pipe (66) into a cylindrical rib (62b) of the second formwork (62) on the opposite side of the location where the concrete wall (12) is to be formed with respect to the first formwork (61) and fitting a cylindrical rib (64b) of a second support (64) to an end of the second pipe (66) to construct a second concrete wall forming member (92). The concrete wall forming step includes a step of removing the second support (64) and the second pipe (66) after the fresh concrete has cured, and a horizontal connecting body (22, 23, 24, 25, 26) and a spacer - In a storage composite construction step of constructing a storage composite (20) configured such that horizontal connectors (22, 23, 24, 25, 26) and spacers (28) are alternately arranged in the vertical direction, the removed second support (64) is used as a partition plate (21) constituting the horizontal connecting body (22, 23, 24, 25, 26), the second pipe (66) is used as the spacer (28), and the first formwork (61) and the second formwork (62) have the same material and shape as the partition plate (21) constituting the horizontal connecting body (22, 23, 24, 25, 26) of the storage composite (20) constructed on the chassis (13).

[0010] A fifth aspect of the present invention is an invention based on the fourth aspect, characterized by having a step of removing the first support (63) and the first pipe (65) after the concrete wall forming step.

[0011] The sixth aspect of the present invention is an invention based on the of 4 aspect, wherein the first concrete wall forming member construction step includes a reinforcing bar insertion step of inserting a plurality of reinforcing bars (81, 82) into insertion holes (44, 45) provided in a reinforcing bar fixing jig (40) engaged with the engaged holes (61k, 62k) of the first formwork (61) and the second formwork (62).

[0012] The seventh aspect of the present invention is Fourth or Fifth an invention based on the aspect, wherein the concrete wall forming member construction step includes a step of connecting the first formwork (61) and the second formwork (62) by a separator (71).

Advantages of the Invention

[0013] In the construction method of the concrete structure according to the first aspect of the present invention or the concrete structure according to the fourth aspect of the present invention, the first formwork (61) and the second formwork (62) have cylindrical ribs (61b) into which pipes (65, 66) can be inserted, and are made of the same material and have the same shape as the partition plate (21) constituting the horizontal connectors (22, 23, 24, 25, 26) of the storage composite (20) constructed on the chassis (13). Therefore, it is not necessary to newly prepare parts dedicated to the remaining formwork. As a result, it is possible to facilitate the ordering and procurement of parts. Further, the concrete wall forming step includes a step of removing the second support (64) and the second pipe (66) after the fresh concrete has hardened, and the removed second support (64) and the second pipe (66) can be used in the storage composite construction step. As a result, the amount of parts transported to the storage tank construction site can be reduced.

[0014] In the construction method of the concrete structure according to the second aspect of the present invention and the concrete structure according to the sixth aspect of the present invention, since a plurality of vertical reinforcing bars (81) and horizontal reinforcing bars (82) are inserted into the insertion holes (44, 45) provided in the reinforcing bar fixing jig (40) engaged with the engaged holes (61k, 62k) of the first formwork (61) and the second formwork (62), the concrete wall can be strengthened.

[0015] In the construction method of the concrete structure according to the third aspect of the present invention and the concrete structure according to the seventh aspect of the present invention, since the first formwork (61) and the second formwork (62) are connected by the separator (71), the first formwork (61) and the second formwork (62) can be firmly connected.

Brief Description of the Drawings

[0016]

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Embodiments for Carrying Out the Invention

[0017] Next, embodiments for carrying out the present invention will be described with reference to the drawings.

[0018] FIG. 1 is a cross-sectional view of a main part showing the concrete structure 11 of the present invention. As shown in FIG. 1, in this embodiment, the concrete structure 11 has a concrete wall 12 erected on the bottom of a hole dug in the ground or on a mortar or concrete base plate 13 laid on the ground. A first formwork 61 provided on the surface of the concrete wall 12 and a second formwork 62 provided on the opposite surface via the concrete wall 12 remain integrated with the concrete wall 12. The first formwork 61 and the second formwork 62 are cylindrical ribs 61 into which the pipes 65 and 66 shown in FIG. 19 can be inserted b, 62bIt has the same material and shape as the partition plate 21 that constitutes the horizontal connectors 22 to 26 of the storage composite body 20 constructed on the chassis 13. Further, the concrete structure 11 includes a plurality of vertical reinforcing bars 81 and horizontal reinforcing bars 82 that are disposed between the first formwork 61 and the second formwork 62 and hold the first formwork 61 and the second formwork 62. By inserting the plurality of vertical reinforcing bars 81 and horizontal reinforcing bars 82 into the insertion holes 44 and 45 of the reinforcing bar fixing jig 40 engaged with the engaged holes 61k and 62k of the first formwork 61 and the second formwork 62, the vertical reinforcing bars 81 and the horizontal reinforcing bars 82 are connected to the first formwork 61 and the second formwork 62. In the concrete structure 11, the first formwork 61 and the second formwork 62 are joined by a separator 71.

[0019] Figure 2 is a cross-sectional view of the main part showing the storage tank 10 constructed by the concrete structure of the present invention, and Figure 3 is a plan view of the storage tank 10 in Figure 2. In the central part of the storage tank 10 of the present embodiment, there is a concrete central wall 15 which is a ground beam constructed to cross on the concrete floor 14 in a cross shape. In the present embodiment, the outer formwork outside the side wall of the storage tank is called the first formwork 61, and the inner formwork inside the side wall of the storage tank is called the second formwork 62. Regarding the formwork of the central wall 15, the formwork on the right side of the drawing is called the first formwork 61, and the formwork on the left side of the drawing is called the second formwork 62.

[0020] Figs. 4, 5, 6 and 7 are respectively a perspective view, a plan view, a side view, and a cross-sectional view of the partition plate 21 used in the present invention. As shown in Figs. 6 and 7, the first formwork 61 and the second formwork 62 are formed symmetrically with respect to the partition plate 21 which is the same component. In this embodiment, three concentric first cylindrical ribs 21a with a small diameter, second cylindrical ribs 21b with a medium diameter, and third cylindrical ribs 21c with a large diameter are formed on the upper surface of the partition plate 21, and a fourth cylindrical rib 21d with a small diameter, a fifth cylindrical rib 21e with a medium diameter, and a sixth cylindrical rib 21f with a large diameter are formed concentrically on the lower surface of the partition plate 21. A total of four (two vertically and two horizontally) are placed (Figs. 5 and 7). The diameter of the first cylindrical rib 21a is the same as the diameter of the fourth cylindrical rib 21d, the diameter of the second cylindrical rib 21b is the same as the diameter of the fifth cylindrical rib 21e, and the diameter of the third cylindrical rib 21c is the same as the diameter of the sixth cylindrical rib 21f. Also, an insertion hole 21g through which the main shaft pipes 27 and 28 described later can be inserted is formed at the center where the partition plate 21 is divided into four parts (Figs. 4 and 5). Also, in the same horizontal plane Most At each outer corner portion of two adjacent partition plates located on the outside, there is provided a first engaged hole 21j for engaging a coupling jig 30 for coupling the partition plates 21. Further, adjacent to the coupling jig 30, there is provided a second engaged hole 21k for engaging a reinforcing bar fixing jig 40 for fixing the vertical reinforcing bars 81 and the horizontal reinforcing bars 82 while coupling two adjacent partition plates 21 in the same horizontal plane to each other. shown in Figure 8

[0021] Fig. 8 is a perspective view of a coupling jig 30 for coupling each outer corner portion of two adjacent partition plates 21 located on the outside in the same horizontal plane to each other. Fig. 15 is a plan view showing a state in which a plurality of first formworks 61 and second formworks 62 and vertical reinforcing bars 81 and horizontal reinforcing bars 82 are coupled, and Fig. 16 is a cross-sectional view thereof. A plurality of partition plates 21 arranged closely side by side vertically and horizontally in the same plane are coupled by a coupling jig 30 (Fig. Most 15 ​​)。That is, the corner portions of the two outermost and adjacent partition plates 21 in the same plane are joined to each other by the joining jig 30 to form the first formwork 61 and the second formwork 62. The joining jig 30 includes a joining jig body 31 formed in a substantially trapezoidal shape, first engaging protrusions 32 projecting in two rows on the long side of the body on one surface of the joining jig body 31, and second engaging protrusions 33 projecting in two rows on the short side of the body. By driving and inserting the first engaging protrusions 32 and the second engaging protrusions 33 into the first engaged holes 21j of the partition plate 21, the first engaging protrusions 32 and the second engaging protrusions 33 engage with the first engaged holes 61j of the first formwork 61 and cannot come out (Fig. 1 61j . Further, the joining jig 30 is formed of a polyolefin resin (such as polypropylene or polyethylene), a vinyl chloride resin, or the like. 5)

[0022] Figs. 9, 10, 11, 12, 13, and 14 are, respectively, a perspective view, a front view, a plan view, a bottom view, a rear view, and a right side view of a reinforcing bar fixing jig 40 for fixing the vertical reinforcing bars 81 and the horizontal reinforcing bars 82 while joining two adjacent partition plates 21 in the same horizontal plane to each other. The reinforcing bar fixing jig 40 includes reinforcing bar holding protrusions 42 provided in two rows on the long side of a substantially trapezoidal jig body 41, and engaging protrusions 43 provided in two rows on the short side of the jig body 41. Further, the reinforcing bar holding protrusions 42 have a first insertion hole 44 provided on the upper side in the longitudinal direction and a second insertion hole 45 provided on the lower side in the longitudinal direction. The reason for providing two insertion holes vertically is to prevent the reinforcing bars from hitting each other when the vertical reinforcing bars 81 and the horizontal reinforcing bars 82 cross each other. Further, the reinforcing bar fixing jig 40 is formed of a polyolefin resin (such as polypropylene or polyethylene), a vinyl chloride resin, or the like.

[0023] [Construction procedure of the present invention] The assembly procedure of the storage tank configured as described above will be described.

[0024] [Construction of the storage tank foundation part] FIG. 17 shows a cross-sectional view of the storage tank foundation part using the present invention. First, the ground is excavated into a rectangular parallelepiped shape with a predetermined depth, and crushed stone 52 is placed on the bottom surface (base 51) of this excavation part, followed by rolling and leveling. Next, bottom plates 53 composed of partition plates 21 are laid side by side from the corners of the excavation part. Next, after fitting pipes onto the bottom plates 53, gravel 54 is poured in, and while fitting the partition plates 21 serving as upper plates 55 onto the pipes from above, they are covered. Further, sand 56 is spread evenly thereon. After that, mortar 57 is placed with a thickness of about 50 mm over the entire sand 56, and then a protective sheet 58 with a thickness of about 4 mm is laid to cover the mortar 57, and then a water-proof sheet 59 with a thickness of about 1.5 mm is laid. Note that this state is called the chassis 13.

[0025] [Construction of the storage tank outer peripheral wall forming member (shoring work)] FIG. 18 is an assembly drawing of the formwork, pipes, and shoring used in the present invention. FIG. 19 is a side view showing the process during the construction of the concrete structure of the present invention. First, a plurality of partition plates 21, which are the first formwork 61, are arranged on the chassis 13 on the outer periphery of the hole that will become the storage tank. shown in Figure 4 The convex portions 21h and the concave portions 21i of the adjacent partition plates 21 are engaged with each other, shown in Figure 8 and the first engaging protrusions 32 and the second engaging protrusions 33 of the coupling jig 30 shown in Figure 5 are driven into and inserted into the first engaged holes 21j of the partition plates 21, so that the first engaging protrusions 32 and the second engaging protrusions 33 are engaged with the first engaged holes 21j of the partition plates 21 to prevent them from coming off. Thereby, the corner portions of four adjacent partition plates 21 are coupled to each other. Next, shown in Figure 9Insert the side of the reinforcing bar fixing jig 40 where the reinforcing bar holding protrusions 42 and the engaging protrusions 43 are provided into the second coupling hole 21k of the partition plate 21 and insert it. Then, insert the vertical reinforcing bar 81 through the first insertion hole 44 of the reinforcing bar holding protrusion 42, insert the horizontal reinforcing bar 82 through the second insertion hole 45 of the reinforcing bar holding protrusion 42 of the reinforcing bar fixing jig 40 arranged in the vertical direction, and fix the vertical reinforcing bar 81 and the horizontal reinforcing bar 82 to the partition plate 21 (Figs. 15, 16). Note that the horizontal reinforcing bar 82 may be inserted through the first insertion hole 44 of the reinforcing bar holding protrusion 42 and the vertical reinforcing bar 81 may be inserted through the second insertion hole 45. Stand the connected partition plates 21 upright to form the first formwork 61. Next, insert the first support connection member 75 through the insertion hole (not shown) of the first formwork 61, and fix the support connection member 75 from the opposite side of the first formwork 61 with a plastic cone 72 connected to the nut member 74 and the fresh concrete leakage prevention plate 73. After that, fit the end 65a of the first pipe 65 into the second cylindrical rib (not shown) of the first formwork 61. Further, by fitting the second cylindrical rib 21b of the newly prepared partition plate 21 into the other end 65b of the first pipe 65, the first support 63 is formed. Next, screw the end 71a of the separator 71 into the hole 72a provided at the top of the plastic cone 72. Next, screw the other end 71b of the separator 71 into the hole 76a provided at the top of the plastic cone 76, and fix the nut member 78 and the fresh concrete leakage prevention plate 77. Further, by inserting and fixing the nut member 78 through the insertion hole of the newly prepared partition plate 21, the second formwork 62 is formed. Next, screw the end 79a of the support connection member 79 inside the nut member 74, and by fitting the second cylindrical rib (not shown) of the newly prepared partition plate 21 into the end 66b of the second pipe 66, the second support 64 is formed. After that, by repeating the same operation, the first concrete wall forming member 91 and the second concrete wall forming member 92 (support work) are completed.

[0026] [Construction of the central part (cross) wall forming member (support work) of the storage tank] By performing the same operations as in the above-described construction process of the outer peripheral wall forming member of the storage tank, the assembly of the central part (cross) wall 15 forming member (support work) of the storage tank is completed.

[0027] [Placement of fresh concrete] First, by pouring fresh concrete between the first concrete wall forming member 91 and the second concrete wall forming member 92 of the outer wall portion of the storage tank and allowing it to harden, a concrete wall 12 (side wall) is formed. At this time, even if a large amount of fresh concrete is poured at once, since the first concrete wall forming member 91 and the second concrete wall forming member 92 hold the first formwork 61 and the second formwork 62, the first formwork 61 and the second formwork 62 do not deform, and a concrete wall of a predetermined shape can be formed. Also, at the portion that becomes the inner wall of the side wall, if a part of the lowermost second formwork 62 is cut off, concrete can be poured so as to integrate with the concrete of the floor slab. Next, fresh concrete is poured between the first concrete wall forming member 91 and the second concrete wall forming member 92 at the central portion of the storage tank 10 and hardened to form a cross-shaped central wall 15 in plan view. Further, by pouring fresh concrete onto the bottom plate 13 of the storage tank 10 and allowing it to harden, a concrete floor 14 is formed.

[0028] [Storage composite assembly] Figure 20 is a side view showing the concrete structure of the present invention having a storage composite 20. After the fresh concrete of the concrete floor 14 has hardened, the second support 64 and the second pipe 66 of the second concrete wall forming member 92 of the concrete wall 12 which is the side wall are removed, and the second support and the second pipe of the second concrete wall forming member at the central wall 15 portion are removed. Next, in addition to the removed second support 64 and second pipe 66, a plurality of partition plates 21, a main shaft pipe 27, a cylindrical spacer 28, a coupling jig 30, etc. are prepared, and the storage composite 20 is constructed on the concrete floor 14. In this embodiment, five stages of horizontal connectors 22 to 26 are provided, which consist of the lowermost first horizontal connector 22, the second horizontal connector 23 at the second stage from the bottom, the third horizontal connector 24 at the third stage from the bottom, the fourth horizontal connector 25 at the fourth stage from the bottom, and the fifth horizontal connector 26 at the fifth stage from the bottom (uppermost stage) (Figure 20).

[0029] [Top end fresh concrete placement] Place the top formwork 16 between the fifth horizontal connector 26 and the second formwork 62, pour fresh concrete between the first formworks 61 and let it harden to form the top concrete 17. Here, wooden boards such as plywood are usually used for the top formwork.

[0030] [Removal of the first support and the first pipe] Figure 21 is a side view showing the state where the first support 63 and the first pipe 65 are removed from the concrete structure 11 of the present invention. After the top concrete 17 has hardened sufficiently, remove the first support 63 and the first pipe 65. The removed first support 63 and first pipe 65 are, in the case of a large storage tank, used for the unconstructed part of the storage complex or stored for use in subsequent construction.

[0031] [Attachment of the upper and lower panels] Attach a decorative panel (not shown) on the top concrete 17.

[0032] According to the embodiment of the present invention, the removed second support 64 and the second pipe 66 can be used in the storage complex construction process. As a result, the amount of parts transported to the storage tank construction site can be reduced.

Explanation of reference numerals

[0033] 11 Concrete structure 12 Concrete wall 13 Bottom plate 14 Concrete floor 20 Storage complex 21 Partition board 22, 23, 24, 25, 26 Horizontal connectors 40 Rebar fixing jig 61 First formwork 61b Second cylindrical rib 62 Second formwork 65, 66 Pipes 82 Horizontal rebar 71 Separator

Claims

1. A concrete structure (11) having a concrete wall (12) erected on the bottom of a hole dug in the ground or on a chassis (13) laid on the ground, the first formwork (61) provided on the surface of the concrete wall, and the second formwork (62) provided on the opposite surface through the concrete wall (12) being integrated with the concrete wall (12) and remaining, wherein the first formwork (61) and the second formwork (62) have cylindrical ribs (61b, 62b) into which pipes (65, 66) can be inserted, and are made of the same material and have the same shape as the partition plates (21) constituting the horizontal connectors (22, 23, 24, 25, 26) of the storage composite (20) constructed on the chassis (13), and at least a part of the spacers (28) alternately arranged in the vertical direction with the horizontal connectors (22, 23, 24, 25, 26) utilizes the pipes (65, 66) fitted with the cylindrical ribs (61b, 62b) and used as part of the concrete wall forming members (91, 92). A concrete structure (11) characterized by the above.

2. The concrete structure according to claim 1, wherein a plurality of vertical reinforcing bars (81) and horizontal reinforcing bars (82) are inserted into insertion holes (44, 45) provided in a reinforcing bar fixing jig (40) engaged with the engaged holes (61k, 62k) of the first formwork (61) and the second formwork (62).

3. The concrete structure according to claim 1, wherein the first formwork (61) and the second formwork (62) are connected by a separator (71).

4. A method for constructing a concrete structure (11) including a concrete wall forming member construction step of constructing a concrete wall forming member for forming a concrete wall (12) erected on the bottom of a hole dug in the ground or on a chassis (13) laid on the ground, and a concrete wall forming step of pouring fresh concrete between the first formwork (61) and the second formwork (62) of the concrete wall forming member and curing it to form the concrete wall (12), wherein the first formwork (61) and the second formwork (62) are integrated with the concrete wall (12) and remain, The concrete wall forming member construction step includes a first concrete wall forming member construction step of fitting a first pipe (65) into the cylindrical rib (61b) of the first formwork (61) and fitting the cylindrical rib (63b) of the first support (63) to the end of the first pipe (65) to construct a first concrete wall forming member (91); and a second concrete wall forming member construction step of fitting a second pipe (66) into the cylindrical rib (62b) of the second formwork (62) on the side opposite to the location where the concrete wall (12) is formed with respect to the first formwork (61) and fitting the cylindrical rib (64b) of the second support (64) to the end of the second pipe (66) to construct a second concrete wall forming member (92). The concrete wall forming step includes a step of removing the second support (64) and the second pipe (66) after the fresh concrete has hardened. In the storage composite construction step of constructing a storage composite (20) configured such that the horizontal connectors (22, 23, 24, 25, 26) and the spacers (28) are alternately arranged in the vertical direction, the removed second support (64) is used as a partition plate (21) constituting the horizontal connectors (22, 23, 24, 25, 26), and the second pipe (66) is used as the spacer (28). The first formwork (61) and the second formwork (62) have the same material and shape as the partition plate (21) constituting the horizontal connectors (22, 23, 24, 25, 26) of the storage composite (20) constructed on the chassis (13). A construction method for a concrete structure, characterized by the above.

5. The construction method for a concrete structure according to claim 4, further including a step of removing the first support (63) and the first pipe (65) after the concrete wall forming step.

6. The construction method for a concrete structure according to claim 4, wherein the first concrete wall forming member construction step includes a steel bar insertion step of inserting a plurality of steel bars (81, 82) into insertion holes (44, 45) provided in a steel bar fixing jig (40) engaged with the engaged holes (61k, 62k) of the first formwork (61) and the second formwork (62).

7. The construction method for a concrete structure according to claim 4 or 5, wherein the concrete wall forming member construction step includes a step of connecting the first formwork (61) and the second formwork (62) by a separator (71).

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