Foundation and floor integrated construction structure and foundation and floor integrated construction method

Abstract

To suppress movement or deformation of a permanent form so as not to affect a cross sectional shape of a continuous footing.SOLUTION: A foundation-earth floor integrated structure includes: a permanent form 2 along an embankment 4; and a continuous footing 3 located on the opposite side of the embankment of the permanent form 2, wherein at least a base portion 7 of the continuous footing 3 and earth floor-concrete 5 adjacent to the continuous footing 3 are cast integrally. The permanent form 2 includes: multiple shuttering plates 11; and a connecting plate 12 that connects the shuttering plates 11 together in a ring shape in a plan view.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a foundation-grade integrated construction structure and a foundation-grade integrated construction method. [Background technology]

[0002] BACKGROUND ART Conventionally, a foundation-slab integrated construction structure and concrete pouring method are known in which a continuous foundation and a concrete slab adjacent to the continuous foundation are poured together (Patent Document 1). In this type of pouring method, it is common to retain the embankment by providing a temporary formwork along the edge of the embankment inside the earthen floor on the side of the spread footing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-79683 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional techniques, when compacting the embankment of the earth floor, the temporary formwork may move or deform, which may affect the cross-sectional shape of the continuous footing. Therefore, the object of the present disclosure is to provide a foundation-slab integrated pouring structure and pouring method that resolves the problems associated with the above-mentioned conventional technologies, suppresses movement or deformation of the temporary formwork, and does not affect the cross-sectional shape of the continuous footing. [Means for solving the problem]

[0005] The present disclosure provides a foundation-floor integrated pouring structure that includes a temporary formwork that follows the embankment and a continuous footing located on the opposite side of the temporary formwork from the embankment, and in which at least a base portion of the continuous footing and a slab-concrete adjacent to the continuous footing are poured together, the temporary formwork including a plurality of dam panels and connecting plates that connect the dam panels together in a ring shape in a plan view. The connecting plate is connected to the side of the dam plate and is configured to have a ring-shaped frame in a plan view.The temporary formwork is equipped with connecting plates that connect the weir plates together in a circular shape when viewed from above, which prevents the temporary formwork from moving or deforming when compacting the embankment on the floor, thereby minimizing the impact on the cross-sectional shape of the strip footing. Furthermore, because the connecting plates are connected in a circular shape when viewed from above, reinforcement can be provided only in the horizontal direction compared to when vertical shoring is used, minimizing the impact on the cross-sectional shape of the strip footing base.

[0006] The connecting plate may connect the upper portions of the dam plates in a ring shape in a plan view. Since the upper part of the weir plate is connected, no connecting plate remains at the base of the slab, which reduces the impact on the cross-sectional shape of the slab.

[0007] The connecting plate may be disposed on a side surface of the dam plate, and the connecting plate and the dam plate may be connected to each other with bolts. Since the connecting plate is placed on the side of the dam plate, workability is improved for connecting the connecting plate and the dam plate with bolts.

[0008] The connecting plate may be disposed on a side surface of the dam plate, and an engaging portion of the connecting plate may be engaged with a top edge of the dam plate to connect the connecting plate and the dam plate. The connecting plate and the dam plate can be connected simply by engaging the engaging portion of the connecting plate with the top end of the dam plate, which improves the ease of construction when connecting the connecting plate and the dam plate.

[0010] A plurality of weir plates of a temporary formwork along the embankment may be connected together in a ring shape in plan view using connecting plates, a strip footing may be placed on the side of the temporary formwork opposite the embankment, and at least the base of the strip footing and the concrete floor adjacent to the strip footing may be poured together. The weir plates are connected to each other by connecting plates in a ring shape when viewed in plan, so when the embankment is compacted, movement or deformation of the temporary formwork is suppressed, and the cross-sectional shape of the slab footing is not affected.

[0011] The connecting plate may connect the upper portions of the dam plates in a ring shape in a plan view. Since the upper part of the weir plate is connected, no connecting plate remains at the base of the slab, which reduces the impact on the cross-sectional shape of the slab. [Effects of the Invention]

[0012] In the present disclosure, the temporary formwork is equipped with connecting plates that connect multiple sheathing plates together in a ring shape when viewed from above, which prevents the temporary formwork from moving or deforming when compacting the embankment on the earth floor, thereby minimizing the impact on the cross-sectional shape of the continuous footing. Furthermore, because the connecting plates are connected in a ring shape when viewed from above, reinforcement can be achieved only in the horizontal direction compared to when vertical shoring is used, minimizing the impact on the cross-sectional shape of the continuous footing base. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a cross-sectional view of an embodiment of a structure in which foundation and floor are cast in one piece. [Figure 2] A is a side view of the temporary formwork, and B is an end view of the same. [Figure 3] FIG. [Figure 4] A to C are cross-sectional views showing the construction procedure for a foundation and slab integrated construction. [Figure 5] 10A to 10C are cross-sectional views showing the construction procedure according to another embodiment. [Figure 6] 1A is a plan view of a disposable formwork according to another embodiment, FIG. 1B is a side view of the same, and FIG. 1C is a cross-sectional view of FIG. [Figure 7] 1A is a plan view of a disposable formwork according to another embodiment, FIG. 1B is a side view of the same, and FIG. 1C is a cross-sectional view of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. FIG. 1 shows a foundation and floor integrated construction structure 1. The cast-in-place structure 1 is applied to buildings such as residential buildings and commercial and industrial facilities. The cast-in-place structure 1 comprises a temporary formwork 2, a continuous footing 3, and a concrete slab 5 covering the top surface of the embankment 4. The continuous footing 3 is made up of precast concrete 6 and a base 7, and the base 7 is cast integrally with the concrete slab 5 covering the top surface of the embankment 4.

[0015] 2 and 3 show an example of the disposable formwork 2. FIG. The temporary formwork 2 is composed of a plurality of extruded cement panels (ECP; Extruded cement panels) 11 and a connecting plate 12 that connects the extruded cement panels 11 together. The extruded cement board 11 is lightweight and highly rigid. ALC (Autoclaved Lightweight Aerated Concrete) material can also be used for the dam board.

[0016] As shown in FIG. 3, the extruded cement boards 11 are joined together laterally by means of screws (not shown), framed in a rectangular shape in plan view, and placed inside the continuous footing 3. As shown in FIG. 1, an upper portion 11A of the extruded cement board 11 protrudes above an upper surface 7A of the base portion 7 of the continuous footing 3. The connecting plate 12 is an angle iron, and is connected to the side surface 11B of the upper portion 11A with bolts 13. As shown in Fig. 3, the connecting plate 12 is formed by arranging a plurality of angle iron members 12a to 12e in a ring shape in a plan view. The angle iron members 12a to 12e are connected by connecting pieces 14. The connecting plates 12 are connected with one bolt 13 per extruded cement board 11, improving workability of the connection. Note that, as shown by the dashed line L, opposing extruded cement boards 11 may also be connected with one bolt 13.

[0017] In this configuration, the connecting plate 12 is connected to the side surface 11B of the upper portion 11A of the extruded cement board 11 with bolts 13, and therefore does not enter at least the base portion 7 of the continuous footing 3. Therefore, it does not affect the cross-sectional shape of the continuous footing 3. In addition, because the connecting plate 12 is framed in a ring shape, it can be reinforced in the horizontal direction compared to when vertical shoring is used, and the cross-sectional shape of the base portion 7 of the continuous footing 3 is not affected. In this embodiment, the strength of the continuous footing 3 is ensured.

[0018] 4A to 4C show the construction procedure for the foundation and slab integral cast-in-place structure 1. FIG. First, as shown in Figure 4A, a recess 8 for placing a continuous footing 3 is excavated below the ground surface level GL. A temporary formwork 2 is placed along the edge of the remaining embankment 4 adjacent to the recess 8. The lower end of the temporary formwork 2 is buried in the recess 8. A foundation formwork 15 for pouring the base portion 7 is installed in the root excavation recess 8. Furthermore, precast concrete 6 is placed between the foundation formwork 15 and the temporary formwork 2.

[0019] Next, as shown in Figure 4B, a concrete floor 5 is poured on top of the embankment 4. The concrete floor 5 is poured between the precast concrete 6 of the strip footing 3, the temporary formwork 2, and the foundation formwork 15, and the base 7 of the strip footing 3 is poured integrally with the precast concrete 6. After the concrete has cured, as shown in Figure 4C, the foundation formwork 15 is removed, and soil is backfilled into the space on the opposite side of the formed strip footing 3 from the concrete floor 5.

[0020] In this embodiment, multiple extruded cement boards 11 of the temporary formwork 2 that runs along the embankment 4 are joined together in a ring shape in plan view with joining plates 12, a continuous footing 3 is placed on the side of the temporary formwork 2 opposite the embankment 4, and precast concrete 6, a base 7, and the slab concrete 5 adjacent to the continuous footing 3 are poured together. Therefore, when compacting the slab embankment 4, the temporary formwork 2 is prevented from moving or deforming, and the temporary formwork 2 does not expand, which can prevent it from affecting the cross-sectional shape of the continuous footing 3. In this case, it is desirable that the connecting plate 12 be connected to the side surface 11B of the upper portion 11A of the extruded cement board 11 in a ring shape when viewed from above.

[0021] 5A to 5C show another construction procedure. In this integrated foundation and floor construction 1, first, as shown in FIG. 5A, a recess 8 for placing the continuous footing 3 is excavated below the ground surface level GL. A temporary formwork 2 is placed along the edge of the remaining fill 4 adjacent to the excavation recess 8. The lower end of the temporary formwork 2 is buried in the excavation recess 8. In addition to the foundation formwork 15, foundation formworks 16 and 17 for pouring the strip footing 3 are placed in the excavation recess 8. The form of the temporary formwork 2 is the same as that of the above embodiment.

[0022] Next, as shown in Figure 5B, concrete is poured into the foundation formwork 16, 17 of the strip footing 3, and the concrete floor 5 is also poured on the embankment 4. After the concrete has cured, the foundation formwork 15, 16, 17 are removed, and the space on the opposite side of the formed strip footing 3 from the concrete floor 5 is backfilled with soil, as shown in Figure 5C. In this embodiment, the continuous footing 3 having the base portion 7 and the rising portion 9 can be integrally cast together with the concrete slab 5 without using precast concrete 6 .

[0023] In either construction procedure, the connecting plate 12 is connected to the side surface 11B of the upper portion 11A of the extruded cement board 11 with bolts 13, and therefore does not enter the base portion 7 of the continuous footing 3. Therefore, the cross-sectional shape of the continuous footing 3 is not affected. Because the connecting plate 12 is framed in a ring shape, it can provide reinforcement in the horizontal direction compared to when vertical supports are used, and does not affect the cross-sectional shape of the base portion 7 of the continuous footing 3.

[0024] 6A to 6C show another embodiment. The extruded cement boards 11 of the temporary formwork 2 are joined together laterally with screws (not shown) in the same manner as in the above embodiment, framed in a rectangular shape in plan view, and placed inside the continuous footing 3. The connecting plate 12 is placed on the side 11B of the extruded cement plate 11. The connecting plate 12 has a hook-shaped engaging portion 12F, and the engaging portion 12F is engaged with the top end 11C of the extruded cement board 11 to connect the connecting plate 12 and the extruded cement board 11 together. In this embodiment, the hook-shaped engaging portion 12F can be hooked onto the top end 11C of the extruded cement board 11 to engage with it, which improves workability compared to when connecting with bolts 13 as shown in Figures 2 and 3.

[0025] 7A to 7C show yet another embodiment. The connecting plate 12 is placed on the top end 11C of the extruded cement plate 11. The connecting plate 12 is made up of a plurality of flat plate-like members 12X to 12Z, which are connected by connecting pieces 14 and framed in a ring shape in plan view. In any embodiment, the temporary formwork 2 is equipped with connecting plates 12 that firmly connect multiple extruded cement boards 11 together in a ring shape when viewed from above, so that when the embankment 4 is compacted or the floor concrete 5 is poured, the internal embankment 4 is retained by the temporary formwork 2, and the temporary formwork 2 does not bulge due to earth pressure.

[0026] In this embodiment, the temporary formwork 2 comprises a plurality of extruded cement boards 11 and connecting plates 12 that connect the extruded cement boards 11 together in a ring shape when viewed from above, so that the embankment 4 can be retained using inexpensive materials that can withstand the compaction of the embankment 4, and is easy to install. In addition, since the upper part of the extruded cement board 11 is joined in a ring shape when viewed in plan, movement or deformation of the temporary formwork 2 is suppressed when compacting the floor embankment 4, resulting in an integral cast-in-place structure 1 that does not affect the cross-sectional shape of the slab footing 3. Furthermore, by carrying out construction in sections, there is no need to remove the surplus soil from the site, making construction easier and reducing construction costs.

[0027] In this embodiment, the foundation and floor integrated structure 1 is constructed by using precast concrete 6 to integrally cast the base 7 of the continuous footing 3 and the floor concrete 5 covering the top surface of the embankment 4, so that the foundation and floor integrated structure 1 can be constructed inexpensively. In the cast-in-place foundation and floor structure 1, the temporary formwork 2 used for retaining the embankment 4 also serves as the formwork for one side of the base portion 7 of the strip footing 3, eliminating the need to strip the base portion 7 of the strip footing 3 after pouring the concrete. Furthermore, if precast concrete 6 is used for the strip footing 3, the foundation formwork 16, 17 for shaping it is not required, and stripping is also not required. This allows the cast-in-place structure 1 to be constructed easily, inexpensively, and with high precision. [Explanation of symbols]

[0028] 1. Integrated foundation and floor construction 2. Disposal formwork 3. Strip foundation 4 Embankment 5. Earthen floor / concrete 6. Precast concrete 7 Base 11 Extruded cement board 11A Upper part 11B Side 11C Top 12 Binding plate 12F Engagement part 13 volts

Claims

1. In a foundation / floor integrated construction, which includes a temporary formwork along the embankment and a continuous footing located on the opposite side of the temporary formwork from the embankment, and in which at least the base of the continuous footing and the concrete floor adjacent to the continuous footing are poured together, The temporary formwork includes a plurality of dam plates and a connecting plate that connects the dam plates to each other in a ring shape in a plan view, The connecting plate is connected to the side of the weir plate and is configured as a ring-shaped framework when viewed from above, making it a foundation and floor integrated construction.

2. The integrated foundation and floor structure according to claim 1, characterized in that the connecting plate connects the upper part of the dam plate in a ring shape when viewed from above.

3. 3. The integrated foundation and slab structure according to claim 1, wherein the connecting plate is arranged on the side of the dam plate, and the connecting plate and the dam plate are connected with bolts.

4. A foundation / floor integrated construction comprising a temporary formwork along the embankment and a strip footing located on the opposite side of the temporary formwork from the embankment, in which at least the base of the strip footing and the floor / concrete adjacent to the strip footing are poured together, The temporary formwork includes a plurality of dam plates and a connecting plate that connects the dam plates to each other in a ring shape in a plan view, A foundation and floor integrated construction, characterized in that the connecting plate is placed on the side of the weir plate, and the engaging portion of the connecting plate engages with the top edge of the weir plate to connect the connecting plate and the weir plate.

5. A plurality of weir plates of the temporary formwork along the embankment are connected to each other by connecting plates in a circular shape in plan view, The connecting plate is connected to a side surface of the dam plate and frames the dam plate in a ring shape in a plan view, A strip foundation is placed on the opposite side of the embankment of the temporary formwork, A foundation / slab integrated construction method characterized by integrally pouring at least the base portion of the continuous footing and the concrete floor adjacent to the continuous footing.

6. 6. The method for pouring foundation and slab together according to claim 5, wherein the connecting plate connects the upper part of the dam plate in a ring shape in a plan view.

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