Method for constructing slab foundation and partition panel used therefor

Abstract

To provide a construction method of a mat foundation and a partition panel allowing the construction to be carried out without creating an installation joint line between a base part and a mat foundation part on a surface of a peripheral foundation and with a smaller number of personnel.SOLUTION: A construction method comprises: a bar arrangement process S2; a framework installation process S3 of erecting a plurality of frameworks KW1 or KW2 opposite to each other along each of a peripheral mat foundation area GA and an inner mat foundation area NA after the bar arrangement process S2; a partition panel attachment process S4 of attaching a partition panel 1 partitioning a boundary surface BD between the peripheral mat foundation area GA and the inner mat foundation area NA with respect to the framework KW2 after the framework installation process S3; a first placing process S5 of placing concrete in a base area BA and the peripheral mat foundation area GA after the partition panel attachment process S4; a partition panel removal process S6 of removing the partition panel 1 from the framework KW2 after the concrete is cured: and a second placing process S7 of placing concrete in the inner mat foundation area NA after the partition panel removal process S6.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a method for constructing a mat foundation and a partition panel used therein. [Background technology]

[0002] Conventionally, a so-called integral slab foundation construction method has been known as a method for constructing concrete foundations for houses and the like (see, for example, Patent Document 1, etc.). In the integral slab foundation construction method, first, reinforcing bars are arranged on the basing concrete. Next, the formwork support fittings are positioned and fixed on the basing concrete so that their longitudinal direction is perpendicular to the concrete foundation formation direction, and the outer formwork is erected on the formwork support fittings. Next, one end side of the formwork width stop fittings is fixed to the erected outer formwork, and the other end side is placed inside the reinforcing bars. Next, the inner formwork is attached to the other end side of the formwork width stop fittings, so that the inner formwork is erected at a position facing the outer formwork at a predetermined interval and with its lower end spaced a predetermined height above the lower end of the outer formwork. In this state, concrete is first poured up to about the base height of the formwork width stop fittings to form the base part of the slab foundation, and concrete is further poured between the outer and inner formworks to form the slab foundation part. After the concrete has cured, the formwork is dismantled and the parts of the formwork width stoppers that protrude from the concrete are cut off and removed. Finally, the ground is leveled to complete the series of concrete foundation construction work. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3070029 Summary of the Invention [Problem to be solved by the invention]

[0004] However, as mentioned above, in the slab foundation one-piece pouring method, the concrete for the base and the concrete for the slab are poured in one go, but in the hot summer months, the time it takes for the concrete to harden after being poured is short, so it is necessary to send many workers to the site and proceed with the work all at once. In particular, when the construction area is large, many workers are required at once, but with the recent labor shortage, it is expected that it will be difficult to secure the necessary number of workers.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a slab foundation construction method and partition panels for use therein that do not create construction joints between the base portion and the strip foundation portion on the outer peripheral foundation surface, as with the conventional slab foundation integral construction method, and that can be carried out with fewer personnel than before. [Means for solving the problem]

[0006] The slab foundation construction method of the present invention is a construction method for forming a slab foundation of concrete, a base portion of the slab foundation, and a slab foundation portion having an outer periphery slab foundation portion formed in a frame shape in plan view along the outer periphery of the base portion, and an inner periphery slab foundation portion disposed on the inner periphery surrounded by the outer periphery slab foundation portion and connected to the outer periphery slab foundation portion at at least one point, the method comprising the steps of: a reinforcement arrangement process for arranging reinforcing bars on basing concrete; a formwork installation process for erecting a plurality of formworks facing each other along the outer periphery slab foundation area for forming the outer periphery slab foundation portion and the inner periphery slab foundation area for forming the inner periphery slab foundation portion, respectively, after the reinforcement arrangement process; The method includes a partition panel mounting process for mounting a partition panel that separates the boundary surface between the outer perimeter cloth foundation area and the inner perimeter cloth foundation area to the formwork adjacent to the boundary surface, a first pouring process for pouring concrete into the base area and the outer perimeter cloth foundation area to form the base portion after the partition panel mounting process, a partition panel removal process for removing the partition panel from the formwork after the concrete poured in the first pouring process has hardened, a second pouring process for pouring concrete into the inner perimeter cloth foundation area after the partition panel removal process, and a formwork dismantling process for dismantling the formwork after the concrete poured in the second pouring process has hardened.

[0007] According to this method, after the reinforcing bars are arranged on the basin concrete in the reinforcing bar arrangement process, a plurality of formworks are erected facing each other along the outer periphery slab area for forming the outer periphery slab part and the inner periphery slab area for forming the inner periphery slab part in the formwork installation process. Then, after the partition panel that separates the boundary surface between the outer periphery slab area and the inner periphery slab area is attached to the formwork close to the boundary surface in the partition panel installation process, concrete is poured into the base area and the outer periphery slab area in the first pouring process, so that the base part and the outer periphery slab part are integrally formed by pouring concrete once, and no concrete pouring joints are generated on the outer periphery of the outer periphery slab part. On the other hand, the boundary surface between the outer periphery slab area and the inner periphery slab area is separated by the partition panel, and concrete is not poured into the inner periphery slab area, so that the size of the area where concrete is poured in one go is smaller than that of the conventional mat foundation integral pouring method, so that concrete pouring work can be performed with fewer personnel. It can be easily carried out, especially in summer, when concrete hardens quickly due to high temperatures. Furthermore, after the concrete poured in the first pouring step hardens and the partition panel is removed from the formwork in the partition panel removal step, concrete is poured into the inner perimeter strip foundation area in the second pouring step to form the inner perimeter strip foundation part and integrate it with the outer perimeter strip foundation part and the base part. After the concrete poured in the second pouring step hardens, the formwork is dismantled in the formwork dismantling step to complete the construction of the slab foundation. This provides the effect that no joint between the base part and the strip foundation part is created on the outer perimeter foundation surface, as in the conventional slab foundation integral pouring method, and the slab foundation can be constructed with fewer personnel than before.

[0008] The partition panel of the present invention is a partition panel used in a slab foundation construction method, and comprises a first partition plate and a second partition plate, each of which is a rectangular plate arranged vertically side by side on the left and right, and between the first partition plate and the second partition plate are provided an engaging portion and an engaged portion which engage with each other so as to adjust the left-right spacing between them.

[0009] According to this configuration, a first partition plate and a second partition plate are provided which are rectangular plates arranged vertically side by side on the left and right, and an engaging portion and an engaged portion provided between the first partition plate and the second partition plate engage with each other so that the left-right spacing between them can be adjusted, thereby separating the boundary surface between the outer periphery cloth foundation area and the inner periphery cloth foundation area while avoiding interference between the first partition plate and the second partition plate and the reinforcing bars.

[0010] In addition, the first partition plate and the second partition plate each have a first mounting piece and a second mounting piece extending horizontally from their upper ends and capable of being hung on the upper surface of the formwork, and the engaging portion is provided on one of the first mounting piece and the second mounting piece, and the engaged portion is provided on the other.

[0011] With this configuration, the first partition plate and the second partition plate can be attached to the formwork by hooking the first mounting piece and the second mounting piece extending horizontally from their upper ends to the upper surface of the formwork, and the engaging portions and engaged portions provided on one and the other of the first mounting piece and the second mounting piece can engage with each other so that the left-right spacing between them can be adjusted.

[0012] The engaging portion is a protrusion, and the engaged portion is a slot that is long in the left-right direction and into which the protrusion can engage.

[0013] With this configuration, the left-right distance between the first and second partition plates can be easily adjusted by engaging the protrusion as the engaging portion with the long hole as the engaged portion and sliding the first and second partition plates in the left-right direction.

[0014] The device also includes a fixing member that fixes the first partition plate and the second partition plate so that they do not move left and right relative to each other when the engaging portion and the engaged portion are engaged with each other.

[0015] According to this configuration, after adjusting the left-right distance between the first partition plate and the second partition plate, the first partition plate and the second partition plate can be fixed by a fixing member so that they do not move left-right relative to each other, thereby maintaining the left-right distance. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a front view showing a partition panel according to the embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] 1 is a flowchart showing the flow of a slab foundation construction method according to this embodiment. [Figure 8] 1 is a plan view showing an entire construction site formed by a mat foundation construction method according to this embodiment. FIG. [Figure 9] FIG. 9 is an enlarged cross-sectional view taken along line IX-IX in FIG. [Figure 10] This is a cross-sectional view of a construction site showing the process of pouring waste concrete. [Figure 11] FIG. 11 is a cross-sectional view showing a construction site in a reinforcement process. [Figure 12] FIG. 2 is a plan view showing the entire construction site during the reinforcement process. [Figure 13] FIG. 4 is a cross-sectional view showing a construction site during a formwork installation process. [Figure 14] FIG. 2 is a plan view showing the entire construction site during the formwork installation process. [Figure 15] 11 is an explanatory diagram illustrating a state before left-right position adjustment in the partition panel mounting process. FIG. [Figure 16] 13 is an explanatory diagram illustrating the state after left and right position adjustment in the partition panel mounting process. FIG. [Figure 17] A plan view showing the entire construction site during the partition panel installation process. [Figure 18] FIG. 2 is a cross-sectional view showing a construction site during the first concrete pouring step. [Figure 19] FIG. 2 is a plan view showing the entire construction site during the first concrete pouring step. [Figure 20] FIG. 11 is a cross-sectional view showing a construction site during the second concrete pouring process. [Figure 21] FIG. 4 is a plan view showing the entire construction site during the second concrete pouring process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, a concrete embodiment of the slab foundation construction method and partition panel according to the present invention will be described with reference to the drawings.

[0018] <Divider panel> First, the configuration of a partition panel 1 according to an embodiment of the present invention will be described with reference to Fig. 1 to Fig. 6. Fig. 1 is a front view of the partition panel 1, Fig. 2 is a rear view, Fig. 3 is a right side view, Fig. 4 is a left side view, Fig. 5 is a plan view, and Fig. 6 is a bottom view.

[0019] The partition panel 1 is a jig used in the slab foundation construction method of this embodiment described later, and is composed of a first partition plate 10 and a second partition plate 20, which are rectangular plates arranged vertically side by side on the left and right, as shown in Figure 1.

[0020] The first partition plate 10 is configured to include a main body 11, an attachment piece 12, a bolt 13, a reinforcing portion 14, and a wing nut 19.

[0021] The main body 11 is a rectangular plate made of steel (for example, electrolytic galvanized steel) and has a thickness of 2 mm, a height of 450 mm, and a left-right width of 180 mm, for example.

[0022] The mounting piece 12 extends horizontally from the upper end of the main body 11 and is capable of being hung on the upper surface of a formwork. The mounting piece 12 is formed by bending the same rectangular steel plate material as the main body 11 at a right angle over a width of about 40 mm from the longitudinal end.

[0023] Bolt 13 is a known bolt that is inserted upward from below into through hole 12h formed at a predetermined position on the right side of mounting piece 12 and fixed by welding to the underside of mounting piece 12. Foot 13a of bolt 13 protrudes cylindrically to a height of several tens of mm from a predetermined position on the right side of the top surface of mounting piece 12. Foot 13a of bolt 13 constitutes a protrusion that serves as an engagement portion of the present invention.

[0024] The reinforcing part 14 is a member for reinforcing the main body 11. The reinforcing part 14 is made of the same steel plate as the main body 11, and is a thin plate-like piece slightly shorter than the main body 11 that is folded in a mountain shape at the center in the width direction, and both ends along the longitudinal direction are fixed to the right side of the front of the main body 11 by welding.

[0025] The wing nut 19 is a known wing nut that can be screwed onto the bolt 13. The wing nut 19 constitutes a fixing member of the present invention.

[0026] The second partition plate 20 is configured to include a main body 21, an attachment piece 22, an elongated hole 23, and a reinforcing portion 24.

[0027] The main body 21 is a rectangular plate made of steel (for example, electro-galvanized steel), and is set to, for example, a thickness of 2 mm, a height of 450 mm, and a left-right width of 180 mm.

[0028] The mounting piece 22 extends horizontally from the upper end of the main body 21 and is a portion that can be hung on the upper surface of a formwork. The mounting piece 22 is formed by bending the same rectangular steel plate material as the main body 21 at a right angle with a width of about 40 mm from the longitudinal end. Furthermore, the mounting piece 22 has an extension portion 22a that extends about 110 mm to the left of the left end of the main body 21.

[0029] The long hole 23 is an elongated hole with a left-right length of about 70 mm and a front-to-back width of about 10 mm in the extension portion 22a of the mounting piece 12. The foot portion 13a of the bolt 13 as a protrusion is inserted from below into the long hole 23 and engages with it. The first partition plate 10 and the second partition plate 20 can slide relative to each other in the left-right direction with the long hole 23 and the foot portion 13a engaged. Furthermore, by screwing a wing nut 19 onto the foot portion 13a of the bolt 13 protruding upward through the long hole 23, the first partition plate 10 and the second partition plate 20 can be fixed so that they do not move relative to each other in the left-right direction.

[0030] The reinforcing part 14 is a member for reinforcing the main body 11. The reinforcing part 14 is made of the same steel plate as the main body 11, and is formed by folding a vertically long plate-like piece slightly shorter than the main body 11 in a mountain shape at the center of the left and right sides, and is fixed to the front of the main body 11 by welding at both ends along the longitudinal direction.

[0031] <Mat foundation construction method> Next, the slab foundation construction method according to this embodiment will be described with reference to Figs. 7 to 21. Fig. 7 is a flow chart showing the flow of the slab foundation construction method according to this embodiment. Fig. 8 is a plan view showing the entire construction site formed by the slab foundation construction method according to this embodiment, and Fig. 9 is an enlarged cross-sectional view of line IX-IX in Fig. 8. Fig. 10 is a cross-sectional view of the construction site showing the mortar concrete pouring process. Fig. 11 is a cross-sectional view showing the construction site in the reinforcing bar arrangement process, and Fig. 12 is a plan view showing the entire construction site. Fig. 13 is a cross-sectional view showing the construction site in the formwork installation process, and Fig. 14 is a plan view showing the entire construction site. Fig. 15 is an explanatory view explaining the state before the left-right position adjustment in the partition panel installation process, Fig. 16 is an explanatory view explaining the state after the left-right position adjustment, and Fig. 17 is a plan view showing the entire construction site in the partition panel installation process. Fig. 18 is a cross-sectional view showing the construction site in the first pouring process, and Fig. 19 is a plan view showing the entire construction site. Fig. 20 is a cross-sectional view showing the construction site in the second pouring process, and Fig. 21 is a plan view showing the entire construction site.

[0032] The slab foundation construction method according to this embodiment is a construction method for concrete slab foundation work, in which a slab foundation base B is formed, and a slab foundation portion N having an outer periphery slab foundation portion GN formed in a frame shape in plan view along the outer periphery of the base portion B, and an inner periphery slab foundation portion NN disposed on the inner periphery surrounded by the outer periphery slab foundation portion GN and connected to the outer periphery slab foundation portion GN at at least one point, as shown in Figures 8 and 9. Figure 8 shows an example in which the outer periphery slab foundation portion GN is formed in a square shape in plan view, and the inner periphery slab foundation portion NN is formed in a cross shape in plan view, and the slab foundation portion N as a whole is formed in a square shape in plan view.

[0033] The flow of the construction method for a mat foundation in this embodiment is as shown in the flowchart of Fig. 7. First, the ground on the site where a building is to be constructed is excavated to a predetermined size and depth and leveled, and then in step 1 (hereinafter abbreviated as S1, the same applies to the other steps), a basin concrete pouring process is carried out. In the basin concrete pouring process S1, as shown in Fig. 10, crushed stone 50 is laid and compacted, and basin concrete 52 is poured on top of it. After the basin concrete 52 has cured, the positions of the reinforcing bars and formwork are marked out.

[0034] Next, in S2, a reinforcing bar arrangement step is performed. In the reinforcing bar arrangement step S2, reinforcing bars 3 are arranged in the horizontal and vertical directions with respect to the basing concrete 52 via spacer blocks 54, as shown in Figs.

[0035] Next, in S3, a formwork installation process is performed. In the formwork installation process S3, as shown in Figures 13 and 14, formwork KW1 and KW2 are erected facing each other along the outer perimeter cloth foundation area GA, and formwork KW2 and KW2 are erected facing each other along the inner perimeter cloth foundation area NA. The formwork KW1 has a height of 700 mm, and the formwork KW2 has a height of 450 mm. The formwork installation work will be described in more detail below. There are two types of formwork KW2: one for straight sections that are straight when viewed from above, and one for corner sections that are L-shaped when viewed from above.

[0036] First, the installation work of the formwork in the outer periphery strip footing area GA will be explained. First, the formwork support metal fittings 58, called half separators, are placed at a predetermined position in the outer periphery strip footing area GA on the basin concrete 52 so that their longitudinal direction is perpendicular to the concrete foundation forming direction, and then they are positioned by driving nails into the nail holes to fix them on the basin concrete 52. The formwork KW1 is inserted between the outer support piece and the inner support piece of this formwork support metal fitting 58 and installed vertically. The formwork KW1 has two mounting holes at positions 250 mm from the bottom end.

[0037] Next, a screw portion provided on one end of the base of the form width stop fitting 56 is inserted into the mounting hole of the erected formwork KW1, and the outer stop portion on the other end is placed inside the reinforcing bar 3. Furthermore, by screwing a nut onto the end of the screw portion protruding from the formwork KW1, the form width stop fitting 56 is fixed vertically and firmly to the flat plate portion on the inside of the formwork KW1.

[0038] By mounting the form KW2 between the outer stopper and the locking part at the other end side of the form width stopper 56 fixed to the form KW1 in this way, the form KW2 is sandwiched between the outer stopper and the locking part and erected vertically to the base and facing the KW1. The form KW2 is supported by the form width stopper 56 and positioned so that its upper end is approximately flush with the upper end of the form KW1. The distance between both forms KW1 and KW2 is approximately 300 mm.

[0039] Next, the work of installing the formwork in the inner perimeter cloth foundation area NA will be described. First, the formwork support metal fittings 57, called panel spacers, are placed at predetermined positions in the inner perimeter cloth foundation area NA on the basing concrete 52 so that their longitudinal direction is perpendicular to the direction in which the inner perimeter cloth foundation part is formed, and then the metal fittings are positioned by driving nails into the nail holes to fix them on the basing concrete 52.

[0040] The formwork KW2 is inserted between the outer support piece and the inner support piece at one end of the formwork support fitting 57 and erected vertically. Furthermore, the formwork KW2 is inserted between the outer support piece and the inner support piece at the other end of the formwork support fitting 57 and erected vertically. In this way, the formwork KW2 are erected facing each other along the inner perimeter cloth foundation area NA.

[0041] Next, in S4, a partition panel mounting step is performed. In the partition panel mounting step S4, as shown in Figs. 15 to 17, the partition panel 1 is mounted to the formwork KW2 adjacent to the boundary between the outer periphery plain foundation area GA and the inner periphery plain foundation area NA.

[0042] Specifically, as shown in Fig. 17, the partition panel 1 is attached to the upper surface of the formwork KW2 for the corners on both sides of the boundary surface BD between the outer periphery cloth foundation area GA and the inner periphery cloth foundation area NA. That is, as shown in Fig. 15, the first partition plate 10 is arranged by hooking the mounting piece 12 to the upper surface of the formwork KW2 located on one horizontal side of the boundary surface BD, and the second partition plate 20 is arranged by hooking the mounting piece 22 to the upper surface of the formwork KW2 located on the other horizontal side of the boundary surface BD. Furthermore, the foot portion 13a of the bolt 13 as a protrusion protruding from the upper surface of the mounting piece 12 of the first partition plate 10 is inserted from below into the long hole 23 formed in the extension portion 22a of the mounting piece 22 of the second partition plate 20 and engaged. That is, the partition panel 1 is attached in a posture in which the mounting pieces 12, 22 of the first partition plate 10 and the second partition plate 20 overlap each other partially (the mounting piece 22 is on top and the mounting piece 12 is on the bottom) and straddle the formwork KW2 on both sides. Furthermore, as shown in FIG. 16, the left and right positions of the first partition plate 10 and the second partition plate 20 are adjusted. That is, the first partition plate 10 is slid horizontally toward the side approaching the second partition plate 20 so as to abut the reinforcing bar 3 between the formwork KW2 on both sides from the left side, and the second partition plate 20 is slid horizontally toward the side approaching the first partition plate 10 so as to abut the reinforcing bar 3 from the right side. In this state, the thumbscrew 19 is screwed into the foot 13a of the bolt 13 as a protrusion, so that the first partition plate 10 and the second partition plate 20 are integrated in a state in which they do not move left and right with respect to each other.

[0043] Next, in S5, the first pouring step is performed. In the first pouring step S5, concrete is poured into the base area BA and the outer periphery strip foundation area GA, as shown in Fig. 18 and Fig. 19. That is, first, concrete is poured into the entire area surrounded by the first formwork KW1 up to the height of the base of the formwork width stopper 56 and the base of the formwork support fitting 57, and then concrete is poured between the opposing first formwork KW1 and second formwork KW2 in the outer periphery strip foundation area GA. At this time, since the boundary surface BD between the outer periphery strip foundation area GA and the inner periphery strip foundation area NA is partitioned by the partition panel 1, the concrete poured between the opposing first formwork KW1 and second formwork KW2 in the outer periphery strip foundation area GA does not flow into the inner periphery strip foundation area NA.

[0044] Next, in S6, a partition panel removing step is performed. In the partition panel removing step S6, the partition panel 1 is removed after the concrete poured in the first pouring step S5 has hardened due to the passage of a curing period.

[0045] Next, in S7, a second pouring step is performed. In the second pouring step S7, concrete is poured into the inner perimeter cloth foundation area NA as shown in Fig. 20 and Fig. 21. That is, concrete is poured between the second formworks KW2, KW2 on both opposing sides of the inner perimeter cloth foundation area NA.

[0046] Next, in S8, a formwork dismantling process is performed. In the formwork dismantling process S8, after the concrete poured in the second pouring process S7 has hardened due to the passage of a curing period, all of the formwork is dismantled, and the ground is leveled to complete the construction of the mat foundation.

[0047] As is clear from the above detailed description, the slab foundation construction method according to this embodiment is a construction method for forming a slab foundation base portion B, an outer periphery slab foundation portion GN formed in a frame shape in plan view along the outer periphery of the base portion B, and a slab foundation portion N having an inner periphery slab foundation portion NN arranged on the inner periphery surrounded by the outer periphery slab foundation portion GN and connected to the outer periphery slab foundation portion GN at at least one location, in concrete slab foundation construction, and includes a reinforcement arrangement process S2 of placing reinforcing bars 3 on the basin concrete 52, a formwork installation process S3 of erecting a plurality of formwork KW1 or KW2 facing each other along the outer periphery slab foundation area GA for forming the outer periphery slab foundation portion GN and the inner periphery slab foundation area NA for forming the inner periphery slab foundation portion NN, respectively, after the reinforcement arrangement process S2, and After step S3, there is a partition panel mounting process S4 in which a partition panel 1 that separates the boundary surface BD between the outer periphery strip foundation area GA and the inner periphery strip foundation area NA is mounted to a formwork KW2 adjacent to the boundary surface BD, and after the partition panel mounting process S4, there is a first pouring process S5 in which concrete is poured into the base area BA and the outer periphery strip foundation area GA to form the base portion B, and after the concrete poured in the first pouring process S5 has hardened, there is a partition panel removal process S6 in which the partition panel 1 is removed from the formwork KW2, and after the partition panel removal process S6, there is a second pouring process S7 in which concrete is poured into the inner periphery strip foundation area NA, and after the concrete poured in the second pouring process S7 has hardened, there is a formwork dismantling process S8 in which the formworks KW1, KW2 are dismantled.

[0048] According to this method, after the reinforcing bars 3 are arranged on the basing concrete 52 in the reinforcing bar arrangement process S2, a plurality of formworks KW1, KW2 or KW2 are erected facing each other along the outer periphery slab area GA for forming the outer periphery slab part GN and the inner periphery slab area NA for forming the inner periphery slab part NN in the formwork installation process S3. Then, after the partition panel 1 that separates the boundary surface BD between the outer periphery slab area GA and the inner periphery slab area NA is attached to the formworks KW2, KW2 adjacent to the boundary surface BD in the partition panel attachment process S4, concrete is poured into the base area BA and the outer periphery slab area GA in the first pouring process S5, so that the base part B and the outer periphery slab part GN are integrally formed by pouring concrete once, and no concrete pouring joints are generated on the outer periphery surface of the outer periphery slab part GN. On the other hand, the boundary surface BD between the outer perimeter strip foundation area GA and the inner perimeter strip foundation area NA is partitioned by the partition panel 1, and concrete is not poured into the inner perimeter strip foundation area NA. The size of the area where concrete is poured in one go is smaller than that of the conventional slab foundation integral pouring method, so that concrete pouring work can be performed with fewer personnel. It can be easily constructed especially in the summer when concrete hardens quickly due to high temperatures. Furthermore, after the concrete poured in the first pouring process S5 hardens and the partition panel 1 is removed from the formwork KW2, KW2 in the partition panel removal process S6, concrete is poured into the inner perimeter strip foundation area NA in the second pouring process S7, so that the inner perimeter strip foundation part NN is formed and integrated with the outer perimeter strip foundation part GN and the base part B. After the concrete poured in the second pouring process S7 hardens, the formwork KW1, KW2 are dismantled in the formwork dismantling process S8, and the construction of the slab foundation is completed. Therefore, as with the conventional integral slab foundation construction method, there is no need to create a construction joint between the base part B and the strip foundation part N on the surface of the outer perimeter foundation, and the slab foundation can be constructed with fewer personnel than before.

[0049] The partition panel 1 of this embodiment is a partition panel used in the slab foundation construction method described above, and comprises a first partition plate 10 and a second partition plate 20 each in the shape of a rectangular plate arranged vertically side by side on the left and right, and between the first partition plate 10 and the second partition plate 20, a foot 13a of a bolt 13 as an engaging part and a long hole 23 as an engaged part are provided, which engage with each other so as to adjust the left-right spacing between them.

[0050] According to this configuration, the first partition plate 10 and the second partition plate 20 are rectangular plates arranged vertically side by side on the left and right, and the foot 13a and the long hole 23 of the bolt 13 provided between the first partition plate 10 and the second partition plate 20 engage to adjust the left-right spacing between them, thereby separating the boundary surface BD between the outer periphery cloth foundation area GA and the inner periphery cloth foundation area NA while avoiding interference between the first partition plate 10 and the second partition plate 20 and the reinforcing bar 3.

[0051] In addition, the first partition plate 10 and the second partition plate 20 each have a first mounting piece 12 and a second mounting piece 22 extending horizontally from their upper ends and capable of being hung on the upper surface of the formwork KW2, and one of the first mounting piece 12 and the second mounting piece 22 is provided with a foot 13a of a bolt 13 as an engaging portion, and the other is provided with a long hole 23 as an engaged portion.

[0052] According to this configuration, the first partition plate 10 and the second partition plate 20 can be attached to the formwork KW2 by hooking the first mounting piece 12 and the second mounting piece 22 extending horizontally from their upper ends to the upper surface of the formwork KW2, and the foot 13a and the long hole 23 of the bolt 13 provided on one and the other of the first mounting piece 12 and the second mounting piece 22 can engage with each other so that the left-right spacing between them can be adjusted.

[0053] In addition, the engaging portion of the present invention is foot portion 13a of bolt 13 as a protrusion, and the engaged portion is elongated hole 23 that is long in the left-right direction with which foot portion 13a of bolt 13 can engage.

[0054] According to this configuration, the foot portion 13a of the bolt 13 as the engaging portion and the long hole 23 as the engaged portion are engaged, and the first partition plate 10 and the second partition plate 20 are slid left and right, thereby making it possible to easily adjust the left and right spacing between them.

[0055] In addition, a wing nut 19 is provided as a fixing member that fixes the first partition plate 10 and the second partition plate 20 so that they do not move left and right relative to each other when the foot portion 13a of the bolt 13 and the elongated hole 23 are engaged with each other.

[0056] According to this configuration, after adjusting the left-right distance between the first partition plate 10 and the second partition plate 20, the first partition plate 10 and the second partition plate 20 can be fixed with wing nuts 19 so that they do not move left-right relative to each other, thereby maintaining the left-right distance.

[0057] <Modification> The present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the dimensions of each part of the partition panel 1 shown in the above-mentioned embodiment are merely examples, and are not limited to the above-mentioned dimensions. In addition, in the above-mentioned embodiment, the foot 13a of the bolt 13 as the engaging part is provided in the first partition plate 10, and the long hole 23 as the engaged part is provided in the second partition plate 20, but these may be interchanged.

[0058] <Additional Notes> The embodiment shown in the drawings of this application includes a design that may be the subject of a design application. Specifically, the outer shape of the partition panel 1 can be understood as the overall design of the product name "partition panel." [Explanation of symbols]

[0059] 1 Divider Panel 10 First partition plate 12 First mounting piece 13 Volts 13a Foot part (engaging part, protrusion) 19 Wing nut (fixing part) 20 Second partition plate 22 Second mounting piece 23 Long hole (engaged part) B Base section GN outer fabric foundation NN Inner fabric foundation N Fabric base part GA outer fabric foundation area NA Inner fabric base area S2 Reinforcement process S3 Formwork installation process S4 Partition panel installation process S5 First pouring process S6 Partition panel removal process S7 Second pouring process S8 Formwork dismantling process

Claims

1. A construction method for concrete mat foundation construction, comprising forming a mat foundation base, an outer periphery mat foundation part formed in a frame shape in plan view along the outer periphery of the base, and an inner periphery mat foundation part disposed on the inner periphery surrounded by the outer periphery mat foundation part and connected to the outer periphery mat foundation part at at least one point, A reinforcing bar arrangement process for arranging reinforcing bars on the basing concrete; After the reinforcing bar arrangement process, a formwork installation process is performed in which a plurality of formworks are erected opposite each other along an outer periphery slab area for forming the outer periphery slab part and an inner periphery slab area for forming the inner periphery slab part, After the formwork installation process, a partition panel that separates the boundary surface between the outer perimeter base area and the inner perimeter base area is attached to the formwork adjacent to the boundary surface. After the partition panel mounting step, a first pouring step of pouring concrete into a base area for forming the base portion and into the outer periphery base area; a partition panel removing step of removing the partition panel from the formwork after the concrete poured in the first pouring step has hardened; A second pouring step of pouring concrete into the inner perimeter base area after the partition panel removal step; A formwork dismantling process of dismantling the formwork after the concrete poured in the second pouring process has hardened; A method for constructing a slab foundation.

2. A partition panel for use in the mat foundation construction method according to claim 1, The device includes a first partition plate and a second partition plate each having a rectangular shape and arranged vertically on the left and right sides, The partition panel includes an engaging portion and an engaged portion provided between the first partition plate and the second partition plate, the engaging portion and the engaged portion engaging with each other so as to adjust the left-right distance therebetween.

3. The first partition plate and the second partition plate each include a first mounting piece and a second mounting piece that extend horizontally from an upper end and can be hung on an upper surface of the formwork, The partition panel according to claim 2 , wherein the engaging portion is provided on one of the first mounting piece and the second mounting piece, and the engaged portion is provided on the other of the first mounting piece and the second mounting piece.

4. The engagement portion is a protrusion, The partition panel according to claim 3 , wherein the engaged portion is a long hole that is long in the left-right direction and into which the protrusion can be engaged.

5. The partition panel according to claim 2 , further comprising a fixing member that fixes the first partition plate and the second partition plate so that they do not move left and right relative to each other when the engaging portion and the engaged portion are engaged with each other.

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