Construction methods for building foundations, roof structures, and building foundations
The integrated foundation structure with a notch and reinforcing elements addresses the challenge of resisting pillar movement while minimizing size and cost, enhancing load resistance and construction efficiency.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- LIXIL CORP
- Filing Date
- 2024-11-05
- Publication Date
- 2026-05-19
AI Technical Summary
Existing building foundation structures struggle to effectively prevent the falling, pulling out, and pushing in of pillars due to their own weight while minimizing the size and cost, especially when installed near adjacent lands with different owners.
A foundation structure comprising an installation hole, a notch, a reinforcing plate, and a reinforcing shaft, which are integrated with a support column to distribute and resist forces, reducing the required volume and minimizing excavation and material usage.
The structure effectively resists overturning and uplift loads, reduces the foundation's size, minimizes land encroachment, and streamlines construction by using a smaller volume of materials and fewer construction steps.
Smart Images
Figure 2026081685000001_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a building's foundation structure, a roof structure, and a construction method for the building's foundation structure.
Background Art
[0002] Conventionally, there has been known a technology related to a building's foundation structure in which a filling material such as concrete is filled into the ground where a pillar supporting a building is buried, and the pillar is fixed by hardening the filling material (see, for example, Patent Document 1).
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] By the way, when a force or load is applied to the roof by wind or snow accumulation, the beam may bend, and a force may be applied to the pillar in the direction of falling. In addition, the building's foundation structure needs to resist not only falling but also pulling out of the pillar and pushing in due to the load and self-weight. Therefore, it is necessary to construct the foundation structure with a capacity that can cope with the falling, pulling out, and pushing in of the pillar due to its own weight. However, the foundation structure such as the roof structure is often installed in the vicinity of adjacent lands with different owners, and it is preferable that the size of the foundation structure is as small as possible. Although it is conceivable to arrange eccentric foundation members, since eccentric foundation members are separately required, the configuration increases and the cost increases.
[0005] The present disclosure has been made in view of such a situation, and an object thereof is to provide a building's foundation structure, a roof structure, and a construction method for the building's foundation structure that can effectively prevent the falling, pulling out, and pushing in of the pillar due to its own weight while suppressing the size of the foundation structure.
Means for Solving the Problems
[0006] This disclosure relates to a foundation structure for a building, comprising: an installation hole formed from a paving material layer on the ground to the ground, in which a support column is to be placed; a notch formed on the lower side of the paving material layer and horizontally outside the installation hole, communicating with the installation hole; a rod-shaped reinforcing shaft positioned to enter both the installation hole and the notch; a reinforcing plate fixed to the side surface of the support column within the installation hole; and a filling material to fill the installation hole and the notch. [Brief explanation of the drawing]
[0007] [Figure 1] This is a perspective view of a building to which the foundation structure of the first embodiment is applied. [Figure 2] This is a side view of a building to which the foundation structure of the first embodiment is applied. [Figure 3] This is a front view of a building to which the foundation structure of the first embodiment is applied. [Figure 4] This is a schematic longitudinal cross-sectional view showing the foundation structure of the building according to the first embodiment, viewed from the side. [Figure 5] This is a schematic longitudinal cross-sectional view showing the foundation structure of the building according to the first embodiment, viewed from the front. [Figure 6] This is a schematic cross-sectional view showing the foundation structure of the building according to the first embodiment. [Figure 7] This is a perspective view of the reinforcing plate of the first embodiment. [Figure 8A] This is a perspective view showing installation holes and notches formed in the concrete slab and the ground. [Figure 8B] This is a schematic longitudinal cross-sectional view showing installation holes and notches formed in the concrete slab and the ground. [Figure 8C] This is a schematic longitudinal cross-sectional view showing how the support columns to which the reinforcing plates are fixed are positioned in the installation holes. [Figure 9A] This is a schematic cross-sectional view showing how the reinforcing shaft is positioned in the retaining groove of the reinforcing plate so that it fits into both the mounting hole and the notch. [Figure 9B]This is a schematic longitudinal cross-sectional view showing how the reinforcing shaft is positioned in the retaining groove of the reinforcing plate so that it fits into both the mounting hole and the notch. [Figure 10] This is a schematic longitudinal cross-sectional view showing how internal and surface fillers are formed after crushed stone is added. [Figure 11] This is a perspective view of the building according to the second embodiment. [Figure 12] This is a front view of the building according to the second embodiment. [Modes for carrying out the invention]
[0008] The embodiments of this disclosure will be described in detail below with reference to the drawings. In the description of the second and subsequent embodiments, components common to the first embodiment will be denoted by the same reference numerals, and their descriptions will be omitted as appropriate.
[0009] [First Embodiment] The structure 1 of the first embodiment shown in Figures 1 to 3 is, for example, a double-supported carport with space to park two four-wheeled vehicles. The structure 1 is installed on a concrete slab 101, which is a paving material layer formed in the ground 100. Furthermore, the structure 1 of the first embodiment is installed near the boundary line P that separates the site on which the structure 1 is to be constructed from the adjacent land, which is owned by another person. The boundary line P is shown as a dashed line in Figure 1.
[0010] The structure 1 comprises four support columns 2, two beams 3, a roof 4 supported by the two beams 3, and four foundation structures 10 that support each of the support columns 2.
[0011] The support columns 2 are made of a metal such as an aluminum alloy. The four support columns 2 are arranged so that they are at the vertices of a rectangle in a plan view. Of the four support columns 2, two are arranged in the front-to-back direction Y along the boundary line P of the adjacent property, and a drain pipe 5 for draining rainwater, etc., is installed in the front support column 2 Y1. In the front-to-back direction Y of the paper in Figures 1 and 2, the front side is referred to as front Y1 and the rear side as rear Y2.
[0012] The beam 3 is connected to the support column 2. The two beams 3 both extend in the left - right direction X in the front view of FIG. 3 and are connected to the left and right support columns 2. The roof 4 is supported by the two beams 3.
[0013] In the following description, the direction in which the beam 3 extends, that is, the longitudinal direction of the beam 3, is defined as the beam direction B. In FIG. 3, the beam direction B is the left - right direction X. In the left - right direction X of the drawing of FIG. 3, the left side is designated as the left side X1 and the right side is designated as the right side X2. In the foundation structure 10 on the left side X1 of the drawing of FIG. 3, the right side X2 is the roof - covered side covered by the roof 4, and the left side X1 is the side opposite to the roof - covered side. On the other hand, in the foundation structure 10 on the right side X2 of the drawing of FIG. 3, the roof - covered side covered by the roof 4 is the left side X1, and the side opposite to the roof - covered side is the right side X2. The roof - covered side is the side where the roof 4 extends long when viewed from the support column 2 and the side where the ground below the roof 4 is covered, and it can also be said to be the side in the direction in which the roof 4 extends when viewed from the support column 2. And in the description of the foundation structure 10 located on the left side X1 and adjacent to the adjacent - land boundary line P, in the beam direction B, there may be a case where the roof - covered side with respect to the adjacent - land boundary line P is designated as the roof - side P1 and the side opposite to the roof - side P1 is designated as the adjacent - land side P2. Also, in the plan view, the direction orthogonal to the beam direction B is described as the beam - orthogonal direction C. In FIG. 2, the beam - orthogonal direction C is the front - back direction Y.
[0014] Next, the foundation structure 10 located near the adjacent land is described. The foundation structure 10 is a subterranean structure that supports the lower part of the support column 2. As shown in FIGS. 4 and 5, the foundation structure 10 of the building 1 includes an installation hole 11, a gravel layer 12, a notch hole 13, a reinforcing plate 20, a reinforcing shaft 30, a lower anchor bar 14, an internal filler 15, and a surface filler 16.
[0015] The installation hole 11 is an excavation hole formed from the earthen - floor concrete 101 into the ground 100. The installation hole 11 is formed by excavating in the depth direction from the earthen - floor concrete 101 into the ground 100. The gravel layer 12 is a layer composed of gravel arranged at the bottom of the installation hole 11.
[0016] The notch 13 is formed on the underside of the floor concrete 101, extending horizontally from the side of the installation hole 11. In plan view, the opening of the notch 13 is formed to be one size larger than the installation hole 11. The notch 13 is located above the vertical center of the installation hole 11.
[0017] The reinforcing plate 20 is a metal reinforcing material fixed to the outer surface of the support column 2. As shown in Figures 5 and 6, two reinforcing plates 20 are fixed in a state where they sandwich the support column 2 in the beam direction B.
[0018] As shown in Figure 7, the reinforcing plate 20 of this embodiment is a plate-like member that has horizontally cut-out retaining grooves 21 (retaining parts) on both sides and is formed in a substantially H-shape overall. The retaining grooves 21 on both sides of a single reinforcing plate 20 are positioned in the direction C perpendicular to the beam when fixed to the support column 2. Hereinafter, the upper left and right sides of the retaining grooves 21, which correspond to the ends of the H-shape, may be described as the upper piece 23, and the lower left and right sides of the retaining grooves 21, which correspond to the ends of the H-shape, may be described as the lower piece 24.
[0019] Each of the retaining grooves 21 on both sides is fitted with a bending piece 22 that bends in the same direction. The bending pieces 22 on both sides are fixed to the support column 2 and extend in the beam direction B, sandwiching the support column 2 in the direction perpendicular to the beam C. However, the bending pieces 22 on both sides are not limited to this and may extend in the direction perpendicular to the beam C, or they may sandwich the support column 2 in the beam direction B.
[0020] Furthermore, the reinforcing plate 20 has an insertion hole 27 for inserting the anchor rod 25. As shown in Figures 5 and 6, the reinforcing plate 20 is fixed to the support column 2 by the anchor rod 25 and nut 26 inserted into this insertion hole 27. The anchor rod 25 is a fully threaded rod with screw grooves formed along its entire length. Note that the anchor rod 25 does not necessarily have to be a threaded rod or other threaded structure.
[0021] The anchor rod 25 is fastened and secured from both sides in the beam direction B by nuts 26, with the rod passing through the reinforcing plate 20, the support column 2, and the reinforcing plate 20 in the beam direction B. The fastening and securing is performed so that both ends of the anchor rod 25 protrude from the support column 2 and the reinforcing plate 20. In this way, the anchor rod 25 of this embodiment can serve both as a fixing function for the reinforcing plate 20 and as an anchor within the surface filler material 16. Note that the method of fixing the reinforcing plate 20 does not necessarily have to use the anchor rod 25; it may also be fastened and secured using ordinary bolts or the like.
[0022] The two reinforcing plates 20 are fixed to the support column 2 and are at the same height. When fixed to the support column 2, the upper piece 23 and lower piece 24 of the reinforcing plate 20 protrude on both sides of the support column 2 in the direction C perpendicular to the beam. The upper piece 23 of the reinforcing plate 20 overlaps horizontally with the position of the slab concrete 101 above the notch hole 13. On the other hand, the lower piece 24 of the reinforcing plate 20 overlaps horizontally with the position of the notch hole 13, and its lower part is located below the notch hole 13. As a result, the upper part of the reinforcing plate 20 is located above the notch hole 13, and the lower part of the reinforcing plate 20 is fixed to the support column 2 at a position below the position where it overlaps the notch hole 13 in a horizontal view.
[0023] Next, the reinforcing shafts 30 will be described. The reinforcing shafts 30 are rod-shaped reinforcing bars made of metal such as iron. The reinforcing shafts 30 are positioned at a height corresponding to the notch hole 13 and extend from the installation hole 11 to the notch hole 13. In this embodiment, two reinforcing shafts 30 are positioned in each of the retaining grooves 21 on both sides of the reinforcing plate 20. Both reinforcing shafts 30 are positioned on both sides of the column 2 in the direction perpendicular to the beam C, such that their longitudinal direction faces the beam direction B. In this embodiment, the reinforcing shafts 30 are positioned along the direction in which the long side of the column 2 extends in a plan view. However, the orientation of the reinforcing shafts 30 is not limited to this, and the reinforcing shafts 30 may also be positioned along the direction in which the short side of the column 2 extends in a plan view.
[0024] As shown in Figures 4 to 6, both reinforcing shafts 30 are set to a length such that both ends fit into the notched holes 13. In this embodiment, the end of the reinforcing shaft 30 on the adjacent property side P2 in the beam direction B fits into the adjacent property side portion 131 of the notched hole 13, and the end of the reinforcing shaft 30 on the roof side P1 in the beam direction B fits into the roof side portion 132 of the notched hole 13. In this way, one reinforcing shaft 30 extends across the adjacent property side portion 131 of the notched hole 13, the installation hole 11, and the roof side portion 132 of the notched hole 13.
[0025] Next, the lower anchor rod 14 will be described. The lower anchor rod 14 is a rod-shaped member that extends horizontally. The lower anchor rod 14 penetrates the lower part of the support column 2 horizontally. In this embodiment, the longitudinal direction of the lower anchor rod 14 is oriented in the direction C perpendicular to the beam. The lower anchor rod 14 is filled with internal filling material 15 with both ends of the lower anchor rod 14 located outside the support column 2.
[0026] The internal filler 15 is filled into the installation hole 11 and the notched hole 13. The internal filler 15 is, for example, a fast-setting mortar composed of a water-curing binder containing cement. In this embodiment, the internal filler 15 is filled into the installation hole 11 after crushed stone 17 larger than gravel has been placed inside. The internal filler 15 is not particularly limited, and concrete or cement paste other than fast-setting mortar can be used.
[0027] The surface filler 16 is formed above the internal filler 15. The surface filler 16 is made of concrete or the like, which has higher weather resistance than the internal filler 15. The surface of the surface filler 16 is exposed to the outside and is flush with the top surface of the floor concrete 101.
[0028] Next, the construction method for the foundation structure 10 of building 1 will be described. In the following example, the construction of the foundation structure 10 of building 1 in the first embodiment will be used as an example, but the construction method will be the same for the second embodiment and subsequent embodiments.
[0029] First, as shown in Figure 8A, an installation hole formation step is performed in which installation holes 11 are formed in the floor concrete 101 and the ground 100, and a notch hole formation step is performed in which notch holes 13 are formed on the underside of the floor concrete 101.
[0030] In the installation hole formation process, an opening is formed in the slab concrete 101 formed on the ground 100 by chipping work, and the installation hole 11 is formed by excavating into the ground 100 using a conventional excavation tool such as a double shovel. In the installation hole formation process, an excavator may be used, for example. An excavator may be a drill, an earth auger, etc. The excavator may not have a drive mechanism, such as a double shovel.
[0031] In the notch formation process, excavation is carried out to form a notch 13, which will serve as a so-called "jaw," on the underside of the floor concrete 101. The installation hole formation process and the notch formation process may be carried out in parallel. For example, the notch formation process may be carried out in the middle of the process of forming the installation hole 11.
[0032] Next, as shown in Figure 8B, gravel is placed in the installation hole 11, and a gravel layer 12 is formed at the bottom of the installation hole 11. The timing of the formation of the gravel layer 12 is not particularly limited. The formation of the gravel layer 12 may be performed after the installation hole formation process or after the notch hole formation process.
[0033] Next, as shown in Figure 8C, an installation process is carried out in which the support column 2 is installed in the installation hole 11. The support column 2 is placed on the gravel layer 12 of the installation hole 11, sandwiched between two reinforcing plates 20 and with the lower anchor rod 14 attached. As described above, the two reinforcing plates 20 are fixed to the support column 2 in the beam direction B by one anchor rod 25 and a pair of nuts 26. The fixing position of the two reinforcing plates 20 is such that the upper part of the reinforcing plate 20 is above the notched hole 13, and the lower part of the reinforcing plate 20 is fixed to the support column 2 at a position below where it overlaps the notched hole 13 in a horizontal view.
[0034] Next, as shown in Figures 9A and 9B, a reinforcing shaft placement process is performed in which the reinforcing shafts 30 are installed so that they fit into the notched holes 13. In the reinforcing shaft placement process of this embodiment, the reinforcing shafts 30 are placed using the retaining grooves 21 of the reinforcing plate 20. The reinforcing shafts 30 are inserted from the outside of the installation holes 11. The reinforcing shafts 30 are placed in the retaining grooves 21 so that one end of the reinforcing shaft 30 fits into the adjacent land side portion 131 of the notched hole 13 and the other end of the reinforcing shaft 30 fits into the roof side portion 132 of the notched hole 13. Two reinforcing shafts 30 are placed on each side in the direction C perpendicular to the beam. In this embodiment, the reinforcing shafts 30 are not mechanically fixed to the reinforcing plate 20 by fastening or the like, but mechanical fixing or temporary fixing may be performed in the reinforcing shaft placement process.
[0035] Next, as shown in Figure 10, a filling process is carried out in which crushed stone 17 is placed into the installation hole 11 in which the support column 2 is installed, and an internal filling material 15 is formed. The addition of crushed stone 17 temporarily fixes the support column 2 and the reinforcing shaft 30. With the structure temporarily fixed, quick-setting mortar mixed with water is then added.
[0036] The loading of crushed stone 17 and the filling of internal filler 15 may be carried out in multiple stages. The reinforcing shaft placement process may also be carried out in parallel with the filling process. For example, when the loading of crushed stone 17 and the filling of internal filler 15 are carried out in multiple stages, the reinforcing shafts 30 may be placed after the loading of crushed stone 17 and the filling of internal filler 15 has been carried out first. In that state, the loading of crushed stone 17 and the filling of internal filler 15 may be carried out to finally fill the internal filler 15 to the target position.
[0037] Next, the surface filler 16 is filled. In this embodiment, the height of the upper piece 23 of the reinforcing plate 20 and the anchor rod 25 is the position of the surface filler 16. That is, the upper part of the reinforcing plate 20 is in contact with the surface filler 16, and the lower part is in contact with the internal filler 15. The internal filler 15 and the surface filler 16 may be formed separately or at the same time. If they are formed at the same time, the internal filler 15 and the surface filler 16 may have an integrated structure.
[0038] As described above, the foundation structure 10 of the building 1 in the first embodiment is formed from the slab concrete 101 as a paving material layer on the ground 100 to the ground 100 and includes an installation hole 11 in which the support column 2 is placed, a notch hole 13 formed on the lower side of the slab concrete 101 and horizontally outside the installation hole 11 and communicating with the installation hole 11, a rod-shaped reinforcing shaft 30 positioned to fit into both the installation hole 11 and the notch hole 13, a reinforcing plate 20 fixed to the side surface of the support column 2 within the installation hole 11, and an internal filling material 15 that fills the installation hole 11 and the notch hole 13.
[0039] As a result, the internal filling material 15 is filled not only in the installation hole 11 but also in the notched hole 13 located beneath the floor concrete 101. Therefore, when subjected to overturning or uplift loads, the force is transmitted to the floor concrete 101 through the internal filling material 15 in the notched hole 13. This allows the floor concrete 101 to effectively resist overturning and uplift loads, thus reducing the volume required for the foundation structure 10. Furthermore, the reinforcing shaft 30 fits into the notched hole 13, preventing the internal filling material 15 from being destroyed at the boundary between the installation hole 11 and the notched hole 13.
[0040] Furthermore, the reinforcing plate 20 fixed to the side of the support column 2 distributes the force not only by utilizing the width of the support column 2 but also by utilizing the width of the reinforcing plate 20 when a force is applied in a predetermined direction (for example, the beam direction B) where the reinforcing plate 20 is positioned. This effectively suppresses damage to the internal filling material 15 and surface filling material 16 around the reinforcing plate 20, and reduces the required cover thickness. Since the volume required for the foundation structure 10 can be reduced, even when the support column 2 is installed near the adjacent property boundary P, the foundation structure 10 can avoid encroaching on the adjacent property boundary, thereby enabling effective use of the land.
[0041] The foundation structure 10 of this embodiment can be made smaller in size, thereby reducing the amount of chipping and excavation required for the floor concrete 101, and also reducing the amount of internal filling material 15 needed. Reducing the amount of excavation also reduces the amount of excavated soil to be discarded during construction, and reducing the amount of internal filling material 15 required shortens the time required for the filling process. Furthermore, since the chipping area can be reduced, the number of construction steps and the amount of noise during construction can also be reduced. In this way, the foundation structure 10 of this embodiment makes the construction of the building 1 easier and quicker.
[0042] Furthermore, the notched holes 13 in this embodiment are formed around the entire circumference of the installation hole 11, and the reinforcing shaft 30 is configured such that the end P2 on the adjacent land side in the beam direction B enters the notched hole 13, and the end P1 on the roof side in the beam direction B enters the notched hole 13 on the opposite side of the support column 2 in a plan view.
[0043] As a result, the reinforcing shafts 30 fit into each of the notched holes 13 located on both sides of the support column 2, thus more effectively and widely preventing the destruction of the internal filling material 15.
[0044] Furthermore, in this embodiment, the reinforcing plate 20 has a retaining groove 21 that supports the reinforcing shaft 30 at a position where it enters the notched hole 13.
[0045] This allows the position of the reinforcing shaft 30 to be determined using the reinforcing plate 20 during construction, eliminating the need to prepare special jigs and making the reinforcing shaft placement process more efficient.
[0046] Furthermore, in this embodiment, the upper part of the reinforcing plate 20 is located above the notched hole 13, and the lower part of the reinforcing plate 20 is fixed to the support column 2 at a position below the point where it overlaps the notched hole 13 in a horizontal view.
[0047] This allows the reinforcing plate 20 to be placed near the surface of the surface filler 16, which is prone to cracking, thereby effectively preventing damage to the surface of the surface filler 16.
[0048] Furthermore, the foundation structure 10 of the building 1 in this embodiment further includes a surface filling material 16 that is filled on the upper side of the internal filling material 15, and the reinforcing plate 20 has its upper part in contact with the surface filling material 16 and its lower part in contact with the internal filling material 15.
[0049] This allows the use of a highly weather-resistant material for the surface filler 16, while using a less weather-resistant material such as fast-setting mortar for the internal filler 15. Furthermore, the reinforcing plate 20 can be applied to both the internal filler 15 and the surface filler 16.
[0050] Furthermore, the construction method for the foundation structure 10 of the building 1 of this embodiment includes an installation hole formation step of forming an installation hole 11 from the ground concrete 101, which is a paving material layer on the ground 100, to the ground 100; a notch hole formation step of forming a notch hole 13 on the lower side of the ground concrete 101 and on the horizontal outer side of the installation hole 11 that communicates with the installation hole 11; an installation step of installing a support column 2 with a reinforcing plate 20 fixed to its side surface into the installation hole 11; a reinforcing shaft arrangement step of arranging a rod-shaped reinforcing shaft 30 so that it enters both the installation hole 11 and the notch hole 13; and a filling step of filling the installation hole 11 and the notch hole 13 with an internal filling material 15.
[0051] This makes it possible to construct a foundation structure 10 for building 1 that has the above-mentioned effect, which allows the floor concrete 101 to effectively restrain overturning and uplift loads.
[0052] Furthermore, in the reinforcing shaft arrangement process of this embodiment, the reinforcing shaft 30 is supported by a retaining groove 21 formed in the reinforcing plate 20.
[0053] This allows the position of the reinforcing shaft 30 to be determined using the reinforcing plate 20 during construction, thus enabling the reinforcing shaft placement process to be carried out quickly and streamlining the construction work.
[0054] The configuration of the first embodiment has been described above. However, the configuration is not limited to the above embodiment. Next, an embodiment different from the first embodiment will be described with reference to the drawings.
[0055] [Second Embodiment] The structure 1 in the first embodiment is a carport with support on both sides, but the configuration is not limited to this. As shown in Figures 11 and 12, the structure 1a can also be a carport with support on one side that has space to park one four-wheeled vehicle.
[0056] In the second embodiment, the structure 1a comprises two support columns 2 supported by a foundation structure 10, two beams 3 connected to each of the support columns 2, and a roof 4a supported by the two beams 3. The two support columns 2 are arranged along the boundary line P of the adjacent property. A drain pipe 5 for draining rainwater, etc., is also installed in one of the two support columns 2. The foundation structure 10 is assumed to have the same configuration as in the first embodiment.
[0057] Furthermore, the structure 1 is not limited to the carport of the first or second embodiment, and this disclosure can be applied to various roof structures and other structures. For example, the structure includes terraces, walkway roofs (shelters), garden rooms, fences, etc.
[0058] This disclosure is not limited to the embodiments described above, and modifications, improvements, etc., to the extent that they can achieve the purpose of this disclosure are included. [Explanation of Symbols]
[0059] 1,1a Structure (roof structure), 2 Support column, 4,4a Roof, 10 Foundation structure, 11 Installation hole, 13 Notch hole, 15 Internal filling material, 16 Surface filling material, 20 Reinforcement plate, 21 Retaining groove (retaining part), 30 Reinforcement shaft
Claims
1. An installation hole is formed from the pavement layer on the ground to the ground itself, and the support column is placed therein. A notched hole is formed on the lower side of the paving material layer and on the horizontal outer side of the installation hole, and communicates with the installation hole, A rod-shaped reinforcing shaft positioned to fit into both the mounting hole and the notched hole, A reinforcing plate fixed to the side of the support column within the aforementioned mounting hole, A filling material to be filled into the aforementioned installation hole and the aforementioned notched hole, Equipped with, The foundation structure of a building.
2. The aforementioned notch is formed around the entire circumference of the installation hole, The reinforcing shaft is configured such that one end fits into the notched hole, and the other end fits into the notched hole on the opposite side of the support column in a plan view. The foundation structure of a building according to claim 1.
3. The reinforcing plate has a holding portion that supports the reinforcing shaft at a position where it enters the notched hole. The foundation structure of a building according to claim 1.
4. The upper part of the reinforcing plate is located above the notched hole, and the lower part of the reinforcing plate is fixed to the support column at a position below the point where it overlaps the notched hole in a horizontal view. The foundation structure of a building according to claim 1.
5. The above filler further comprises a surface filler that is filled on the upper side of the filler, The reinforcing plate has its upper part in contact with the surface filler and its lower part in contact with the internal filler. The foundation structure of the building according to claim 4.
6. Support posts and A roof structure comprising the foundation structure of a building according to any one of claims 1 to 5.
7. A construction method for the foundation structure of a building, A process of forming installation holes from the paving material layer on the ground to the ground, A notch hole forming step is to form a notch hole communicating with the installation hole on the lower side of the paving material layer and on the horizontal outer side of the installation hole, Installation steps include installing a support column with a reinforcing plate fixed to its side into the aforementioned installation hole, A reinforcing shaft placement step involves arranging a rod-shaped reinforcing shaft so that it fits into both the installation hole and the notched hole, A filling step of filling the aforementioned installation hole and the aforementioned notched hole with filler material, including, Construction methods for the foundation structure of a building.
8. In the reinforcing shaft arrangement step, the reinforcing shaft is supported by a holding portion formed in the reinforcing plate. A method for constructing the foundation structure of a building according to claim 7.