Foundation structure of building

Abstract

To provide a foundation structure of a building, which enables the suppression of construction costs and the effective utilization of surplus soil generated on a job site, and which can secure an underfloor space for the maintenance and inspection of facility piping.SOLUTION: This foundation structure 100 of the building has a continuous footing 110 having a rising part 112, and has a plurality of sections C surrounded by the continuous footing 110. The plurality of sections C include a first section P1 in which a long facility pipe C1 extending over another section C is laid, and a second section P2 in which no facility pipe is laid or a short facility pipe C2 not extending over another section C is laid. In the second partitioned C2, surplus soil generated at the site is stored, and floor concrete 116 is placed on the surplus soil generated at the site. Floor concrete 116 is placed on the C1 of the first section.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a foundation for a building. [Background technology]

[0002] Conventionally, an inverted slab foundation structure used for buildings such as houses has been known (see, for example, Patent Document 1 below). The foundation described in Patent Document 1 is an inverted slab foundation, and is formed by laying and compacting an embankment, and then solidifying the top surface and surrounding sides with concrete. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-332480 Summary of the Invention [Problem to be solved by the invention]

[0004] Inverted slab foundation structures require more concrete and rebar than other common foundation structures such as strip footings, which increases construction costs. While inverted slab foundation structures can effectively utilize surplus soil generated at construction sites for residential and other buildings as fill, when there is little surplus soil, it is necessary to transport fill from outside. Furthermore, when long lengths of equipment piping are laid under the building floor, it is difficult to secure underfloor space for maintenance and inspection of the equipment piping.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a foundation structure for a building that enables reduction in construction costs and effective use of surplus soil generated at the site, while also ensuring underfloor space for maintenance and inspection of equipment piping. [Means for solving the problem]

[0006] In order to achieve the above object, one aspect of the foundation structure of a building according to the present invention is to A foundation structure of a building having a continuous footing with a rising portion, A plurality of compartments are provided, each of which is surrounded by the strip foundation; The plurality of compartments include a first compartment in which a long equipment pipe extending across other compartments is laid, and a second compartment in which no equipment pipe is laid or a short equipment pipe not extending across other compartments is laid, The second section contains on-site generated surplus soil and a concrete floor is poured on top of the on-site generated surplus soil, The first section is characterized by having a concrete floor poured.

[0007] According to this aspect, the foundation structure of the building includes a continuous footing, which reduces the amount of concrete and reinforcing steel required, thereby reducing construction costs. Furthermore, among the multiple compartments surrounded by the continuous footing, the second compartment, which has no equipment piping or only short equipment piping that does not cross over other compartments, contains on-site surplus soil generated at the building construction site and has a concrete floor poured on top of it. This allows the on-site surplus soil to be effectively utilized to raise the top of the concrete floor in the second compartment. As a result, not only can neutralization of the concrete constituting the rising portion of the continuous footing be suppressed in the second compartment, but also flooding of the floor through the pipe penetration holes in the rising portion and the adjacent pipe pit can be suppressed. Meanwhile, among the multiple compartments surrounded by the continuous footing, the first compartment, which has long equipment piping that crosses over other compartments, contains no on-site surplus soil or contains a smaller amount of on-site surplus soil than the second compartment, and has a concrete floor poured on top of it. As a result, there is almost no shortage of on-site surplus soil to store in Section 2, eliminating the need to transport fill soil from outside to the building construction site. Additionally, it is now possible to secure underfloor space in Section 1 for maintenance and inspection of long equipment piping that crosses over to other sections.

[0008] Another aspect of the foundation structure of a building according to the present invention is A beam is installed on the concrete floor in each of the first section and the second section, The bundles in the first section and the bundles in the second section are adjusted to have the same height, A joist is supported by the plurality of beams, and a floor material is supported by the joist, In the first section, the long equipment piping is laid in the underfloor space provided between the floor material and the concrete floor and extends at a predetermined gradient.

[0009] According to this aspect, the joists are supported by the joists installed on the concrete slab, and the joists support the flooring. This not only prevents unevenness in the concrete slab in the first or second section from appearing on the surface of the flooring, but also suppresses deflection of the flooring. Furthermore, using the joists makes level adjustment easier than supporting the flooring with joists installed directly on the concrete slab. Furthermore, the joists in the first section are installed on the concrete slab in the first section, which has a lower top surface than the concrete slab in the second section, and their height from the reference plane is adjusted to the same height as the joists in the second section. This ensures sufficient height for the underfloor space in the first section when the joists in the first and second sections support the joists and the flooring is supported by the joists. Therefore, a underfloor space can be formed in the first section for laying long equipment piping that extends at a predetermined gradient across other sections.

[0010] Another aspect of the foundation structure of a building according to the present invention is When the short equipment piping is laid in the second section, A continuous pit is provided from the top of the concrete floor to the inside of the site-generated surplus soil, and the short length of equipment piping is laid in the pit.

[0011] According to this aspect, it is possible to lay short equipment pipes, such as toilet pipes, that do not cross over other sections in the pit provided in the second section. This makes it possible to lay short equipment pipes in a state that allows for maintenance and inspection while suppressing increases in construction costs in the second section, where the top of the concrete floor is high due to the collection of on-site surplus soil and there is not enough space under the floor.

[0012] Another aspect of the foundation structure of a building according to the present invention is In the second section, the top of the concrete floor is set lower than the top of the rising portion.

[0013] According to this aspect, compared to when the top edge of the concrete floor and the top edge of the rising part of the continuous footing are at the same height in the second section, workability during pouring of the concrete floor, including trowel leveling, can be improved. Also, workability of anti-termite treatment in the second section, in which a sealant containing an anti-termite material is applied to the joint between the rising part of the continuous footing and the poured concrete floor, can be improved.

[0014] In another aspect of the foundation structure of a building according to the present invention, A feature of this vehicle is that an underfloor inspection opening communicating with the first compartment and the second compartment is provided above the raised portion where the first compartment and the second compartment are located on the left and right.

[0015] According to this aspect, even if flooding occurs in the second compartment, which has a lower risk of flooding than the first compartment, the underfloor of the second compartment can be inspected through the underfloor inspection opening provided in the rising portion of the continuous footing between the second compartment and the first compartment. In addition, water can be drained from the second compartment to the first compartment through the underfloor inspection opening, which prevents water from accumulating on the concrete floor of the second compartment.

[0016] Another aspect of the foundation structure of a building according to the present invention is In both the first section and the second section, A plurality of hollow shaft members are placed on the top end of the footing of the continuous foundation, The concrete floor is supported by hollow concrete, in which the concrete that forms the concrete floor is filled into the hollow of the shaft member through the opening at the upper end of the shaft member, and by multiple support members consisting of the shaft member.

[0017] According to this aspect, when pouring ready-mixed concrete to form the concrete floor after backfilling and compacting the first and second sections, the ready-mixed concrete flows into the hollow of the shaft member from the opening at the upper end of the shaft member placed on the footing provided at the lower end of the rising part of the continuous footing. As a result, the multiple support members consisting of the shaft member and the hollow concrete filled in the shaft member and the concrete floor in each of the first and second sections are integrated, and each concrete floor is supported by the multiple support members. This improves the strength of the building's foundation structure. [Effects of the Invention]

[0018] As can be understood from the above explanation, according to each of the above aspects of the present invention, it is possible to provide a foundation structure for a building that enables reduction in construction costs and effective use of surplus soil generated at the site, while also ensuring underfloor space for maintenance and inspection of equipment piping. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a plan view showing an embodiment of a foundation structure of a building according to the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the foundation structure of the building taken along line II-II in FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view of the foundation structure of the building taken along line III-III in FIG. 1. [Figure 4] 4 is a view of the foundation structure of the building as seen in the direction of arrow IV in FIG. 1. [Figure 5] 2 is a cross-sectional view of the foundation structure of the building taken along line VV in FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of a foundation structure for a building according to the present invention will be described with reference to the accompanying drawings. In this specification and drawings, substantially identical components are designated by the same reference numerals, and redundant description may be omitted.

[0021] Fig. 1 is a schematic plan view showing an embodiment of a foundation structure of a building according to the present invention. Fig. 2 is a cross-sectional view of the foundation structure of the building taken along line II-II in Fig. 1. Fig. 3 is a cross-sectional view of the foundation structure of the building taken along line III-III in Fig. 1. Note that Fig. 1 does not show the building, including flooring 210, a base 220, an exterior wall 230, an interior wall 240, etc.

[0022] The foundation structure 100 of a building in this embodiment has a continuous footing 110 and a plurality of compartments C surrounded by the continuous footing 110. In the example shown in Fig. 1, the continuous footing 110 is formed in a lattice pattern and each compartment C has a rectangular shape, but the shapes of the continuous footing 110 and the compartments C are not particularly limited.

[0023] The multiple compartments C include a first compartment C1 and a second compartment C2. The first compartment C1 is a compartment C in which a long equipment piping P1 is laid, extending across the other compartments C. The long equipment piping P1 can be rephrased as a multi-section piping. The long equipment piping P1 includes, for example, water supply and drainage piping and gas piping that pass through the multiple first compartments C1 and extend to the outside of the continuous footing 110.

[0024] The second section C2 is a section in which no utility piping is laid, or in which a short utility piping P2 is laid that does not cross over other sections C. The short utility piping P2 can be rephrased as a single-section piping. The short utility piping P2 includes, for example, a toilet drain pipe, a washroom drain pipe, a bathroom drain pipe, etc. that extend from the second section C2 to the outside of the continuous footing 110.

[0025] 2 and 3, the continuous footing 110 is an integrally constructed reinforced concrete structure. The continuous footing 110 has a frame-shaped footing 111 and a rising portion 112 that rises upward from the center in the width direction of the footing 111, and has an inverted T-shaped cross section perpendicular to the longitudinal direction.

[0026] The footing 111 is provided, for example, on basin concrete 113 poured on the excavated flooring surface. The basin concrete 113 is poured, for example, on a plurality of piles 114 buried in the ground below the flooring surface. The footing 111 is provided, for example, on basin concrete 113 supported from below by piles 114. Note that although the strip footing 110 in the illustrated example is supported by the piles 114, construction of the piles 114 is not necessary if the ground is relatively hard and a predetermined ground bearing capacity can be obtained.

[0027] Of the multiple compartments C surrounded by the continuous footing 110, the second compartment C2 contains on-site generated soil 115, as shown in Fig. 2. The on-site generated soil 115 is soil generated at the construction site of the building foundation structure 100. The on-site generated soil 115 is generated by excavating the ground surface GL at the construction site, for example, during root cutting, flooring, and pile 114 construction.

[0028] In the second section C2, for example, on-site generated soil 115 is stored above the ground level GL, and a concrete floor 116 is poured on top of the on-site generated soil 115. The on-site generated soil 115 stored in the second section C2 is compacted with a rammer or the like before the concrete floor 116 is poured. The concrete floor 116 in the second section C2 is a reinforced concrete structure installed on a moisture-proof sheet laid on top of the on-site generated soil 115.

[0029] As shown in Figure 2, in the second section C2, the top edge of the concrete floor 116 is set lower than the top edge of the rising portion 112 of the continuous footing 110. As a result, in the second section C2 as well, a corner is formed between the inner wall of the rising portion 112 and the top surface of the concrete floor 116, similar to the first section C1 shown in Figure 3. A sealing material S containing an anti-termite material is applied to the corner between the rising portion 112 and the concrete floor 116, sealing the joint between the rising portion 112 and the concrete floor 116.

[0030] On the other hand, of the multiple compartments C surrounded by the continuous footing 110, a concrete slab 116 has been poured in the first compartment C1, as shown in Figure 3, but no on-site surplus soil 115 is contained above the ground level GL. In the first compartment C1, the concrete slab 116 has been poured on top of the ground level GL, which has been backfilled with the on-site surplus soil 115 after root cutting and then compacted with a reamer or the like. The concrete slab 116 in the first compartment C1 is a reinforced concrete structure placed on top of a moisture-proof sheet laid on top of the ground level GL.

[0031] It should be noted that the first section C1 may contain a smaller amount of on-site generated soil 115 above the ground level GL than the second section C2, and the concrete floor 116 may be poured on top of the on-site generated soil 115. In this case as well, the on-site generated soil 115 contained in the first section C1 is compacted with a rammer or the like before the concrete floor 116 is poured.

[0032] 2 and 3, in both the first section C1 and the second section C2, hollow shaft members 117 are placed on the footings 111 of the continuous footing 110. For example, multiple shaft members 117 are arranged at equal intervals along the inner edges of the rising portions 112 of the continuous footing 110 that surround each of the first section C1 and the second section C2.

[0033] The material of the shaft members 117 is not particularly limited, but for example, a VU pipe, which is a straight pipe made of polyvinyl chloride, can be used. Concrete that forms the concrete floor 116 is filled into the hollow of each shaft member 117 through the opening at the top end of the shaft member 117, forming a cylindrical hollow concrete 118.

[0034] In both the first section C1 and the second section C2, each concrete floor 116 is supported from below by a plurality of support members 119, each consisting of hollow concrete 118 and a shaft member 117. Reinforcing bars 118r disposed in the hollow concrete 118 and reinforcing bars 116r disposed in the concrete floor 116 may be connected to each other. This allows the support members 119 and the concrete floor 116 to be firmly integrated, improving their strength.

[0035] The concrete floor 116 does not have to have the reinforcing bars 116r. The hollow concrete 118 does not have to have the reinforcing bars 118r. The foundation structure 100 of the building does not have to have the support members 119.

[0036] 2 and 3, beams 120 are installed on the concrete floor 116 in each of the first section C1 and the second section C2. The beams 120 are, for example, steel floor beams whose heights are adjustable. A plurality of beams 120 are installed on the concrete floor 116, for example, spaced apart vertically and horizontally. The base plate of each beam 120 is fixed to the concrete floor 116.

[0037] The bundles 120 in the first section C1 and the bundles 120 in the second section C2 are adjusted to have the same height H. The height H of each bundle 120 is based on a reference plane such as the ground surface GL. Therefore, the height from the top of the concrete floor 116 to the upper plate of the bundle 120 in the first section C1 is higher than the height from the top of the concrete floor 116 to the upper plate of the bundle 120 in the second section C2.

[0038] The multiple beams 120 support the joists 130 from below via upper plates. In the illustrated example, hollow steel joists 130 are fixed to the upper plates of each beam 120 via fasteners such as bolts. The joists 130 may also be made of wood. Furthermore, the multiple joists 130 supported by the multiple beams 120 support the flooring 210 from below.

[0039] Floor material 210 is supported from below by a plurality of joists 130 and constitutes the first floor of the building. Floor material 210 is, for example, a laminated material in which underfloor material 211, soundproofing material 212, and underfloor material 213 are stacked. When floor material 210 is a laminated material, the number of layers of underfloor material and soundproofing material and the order in which they are stacked are not particularly limited. A floor finishing material 214, for example, flooring, is laid on top of floor material 210.

[0040] For example, plywood, particle board, etc. can be used as the material for the underfloor materials 211, 213. Furthermore, for the material for the soundproofing material 212, any material that can absorb the impact acting on the floor material 210 can be used, such as a rubber mat, a high-density glass wool board, a resin mat, a special asphalt sheet, or a composite material of these.

[0041] 2 and 3, the underfloor space US1 provided between the floor material 210 and the concrete floor 116 in the first section C1 is larger than the underfloor space US2 provided between the floor material 210 and the concrete floor 116 in the second section C2. In other words, the height of the underfloor space US1 between the concrete floor 116 and the floor material 210 in the first section C1 is higher than the height of the underfloor space US2 between the concrete floor 116 and the floor material 210 in the second section C2.

[0042] In the first section C1, the long equipment piping P1 shown in Fig. 1 is laid in the underfloor space US1 provided between the floor material 210 and the concrete floor 116. The long equipment piping P1 extends at a predetermined gradient across multiple sections C. The underfloor space US1 of the first section C1 in which the long equipment piping P1 is laid is higher than the height of the underfloor space US2 of the second section C2, so there is no problem in laying the long equipment piping P1 at the predetermined gradient.

[0043] A channel steel base 220, for example, is fixed onto the rising portion 112 of the continuous footing 110 with anchor bolts and nuts. An exterior wall 230 including exterior materials 231 and heat insulating materials 232 is supported on the base 220 and fixed to the base 220 with bolts, nuts, etc. Furthermore, an interior wall 240 including interior wall materials 242 such as gypsum board or plywood attached to furring strips 241 is provided inside the exterior wall 230.

[0044] Figure 4 is an arrow view of the building foundation structure 100 as seen in the direction of arrow IV in Figure 1. An underfloor inspection opening 112a that communicates with the first compartment C1 and the second compartment C2 is provided above the rising portion 112 of the continuous footing 110, on which the first compartment C1 and the second compartment C2 are located on the left and right. In other words, the underfloor inspection opening 112a is provided at the upper end of the rising portion 112 between the adjacent first compartment C1 and second compartment C2. The underfloor inspection opening 112a is, for example, a notch in the rising portion 112 that is cut downward from the top end of the rising portion 112.

[0045] The bottom end of the underfloor inspection opening 112a is, for example, at the same height as the top edge of the concrete floor 116 of the second section C2. A person inspecting the underfloor space US2 of the second section C2 can visually inspect the underfloor space US2 of the second section C2 through the underfloor inspection opening 112a from the larger underfloor space US1 of the first section C1. In the example shown in Figure 4, the joists 130 on both sides of the underfloor inspection opening 112a are supported by beams 120a fixed to the rising section 112 via angles.

[0046] Fig. 5 is a cross-sectional view of the foundation structure 100 of a building taken along line VV in Fig. 1. In the example shown in Fig. 1, a short equipment pipe P2 is laid in the second section C2 in the upper left corner, which does not cross over other sections C. One end of the short equipment pipe P2 extends vertically and penetrates the floor material 210. The other end of the short equipment pipe P2 has a predetermined slope relative to the horizontal direction, and extends from the inside of the second section C2 to the outside of the continuous footing 110, penetrating the rising portion 112.

[0047] In the second section C2 in which the short equipment piping P2 is laid, a pit 140 is provided that continues from the top of the concrete floor 116 to the inside of the site-generated surplus soil 115. The pit 140 is, for example, a U-shaped trench made of resin or concrete, and is buried in the site-generated surplus soil 115 stored in the second section C2 before the concrete floor 116 is poured. The short equipment piping P2 is laid in this pit 140.

[0048] The operation of the foundation structure 100 for a building according to this embodiment will be described below.

[0049] As described above, the foundation structure 100 of the building of this embodiment has a continuous footing 110 with a rising portion 112, and includes a plurality of compartments C surrounded by the continuous footing 110. The plurality of compartments C include a first compartment C1 in which a long equipment piping P1 is laid that extends across other compartments C, and a second compartment C2 in which no equipment piping is laid or a short equipment piping P2 that does not extend across other compartments C is laid. The second compartment C2 contains on-site generated soil 115, and a concrete slab 116 is poured on top of the on-site generated soil 115, and the concrete slab 116 is poured in the first compartment C1.

[0050] According to the building foundation structure 100 of this embodiment, by using the continuous footing 110, it is possible to suppress an increase in the amount of concrete and reinforcing bars compared to an inverted slab type foundation structure, thereby reducing the construction costs of the building.

[0051] Furthermore, among the multiple compartments C surrounded by the continuous footing 110, the second compartment C2, which has no equipment piping installed or has short equipment piping P2 installed that does not cross over other compartments C, contains on-site generated soil 115 and has a concrete floor 116 poured on top of it. This makes it possible to effectively use the on-site generated soil 115 in the second compartment C2 to raise the top of the concrete floor 116.

[0052] As a result, in the second section C2, the inner wall surface of the rising portion 112 of the continuous footing 110 can be covered with on-site generated surplus soil 115. This prevents carbon dioxide in the air in the underfloor space US2 from penetrating into the concrete that makes up the rising portion 112, and prevents the concrete that makes up the rising portion 112 from being neutralized.

[0053] Furthermore, by raising the top edge of the concrete floor 116 in the second section C2, it is possible to prevent water from flooding into the underfloor space US2 in the second section C2 where no equipment piping is installed. Even if a short length of equipment piping P2 is installed in the second section C2, it is possible to prevent water from flooding into the underfloor space US2 through the piping penetration hole in the rising portion 112 through which the short length of equipment piping P2 passes and the pit 140 adjacent to the piping penetration hole.

[0054] On the other hand, among the multiple compartments C surrounded by the continuous footing 110, the first compartment C1, in which the long equipment piping P1 extending across the other compartments C is laid, either does not contain any on-site generated soil 115 or contains less on-site generated soil 115 than the second compartment C2. A concrete slab 116 is poured on top of the ground surface GL or the small amount of on-site generated soil 115. Therefore, there is almost no shortage of on-site generated soil 115 to store in the second compartment C2, eliminating the need to transport fill soil from outside to the building construction site. Furthermore, it is possible to secure a large underfloor space US1 in the first compartment C1 for maintenance and inspection of the long equipment piping P1 extending across the other compartments C.

[0055] Furthermore, in the building foundation structure 100 of this embodiment, joists 120 are installed on the concrete slab 116 in each of the first section C1 and the second section C2. The joists 120 in the first section C1 and the joists 120 in the second section C2 are adjusted to have the same height H. In each of the first section C1 and the second section C2, joists 130 are supported by the multiple joists 120, and floor materials 210 are supported by the joists 130. In the first section C1, a long equipment piping P1 is laid in an underfloor space US1 provided between the floor materials 210 and the concrete slab 116, and extends at a predetermined gradient.

[0056] With this configuration, the joists 130 are supported by the beams 120 installed on the concrete floor 116, and the joists 130 support the floor material 210. As a result, even if unevenness occurs in the concrete floor 116 in the first section C1 or the second section C2, not only can the unevenness be prevented from appearing on the surface of the floor material 210, but deflection of the floor material 210 can also be suppressed. Furthermore, by using the beams 120, it becomes easier to adjust the level of the joists 130 compared to when the floor material 210 is supported by tumble joists installed directly on the concrete floor 116.

[0057] Furthermore, the bundles 120 of the first section C1 are installed on the concrete slab 116 of the first section C1, which has a lower top height than the concrete slab 116 of the second section C2, and their height H from the ground level GL, which is the reference plane, is adjusted to the same height H as the bundles 120 of the second section C2. This ensures that the height of the underfloor space US1 of the first section C1 is sufficient when the bundles 120 of the first section C1 support the joists 130 and the joists 130 support the floor material 210. Therefore, in the first section C1, an underfloor space US1 can be formed in which to lay the long equipment piping P1 that extends at a predetermined gradient across the other sections C.

[0058] Furthermore, in the building foundation structure 100 of this embodiment, when short equipment piping P2 is laid in the second section C2, a pit 140 is provided that continues from the top of the concrete floor 116 to the inside of the site-generated surplus soil 115. The short equipment piping P2 is laid in the pit 140.

[0059] With this configuration, it is possible to lay short equipment piping P2, such as lavatory piping, in the pit 140 provided in the second section C2, which does not cross over into other sections C. As a result, in the second section C2, where the top of the concrete floor 116 is high due to the collection of on-site generated soil 115 and sufficient underfloor space US2 is not available, it is possible to lay short equipment piping P2 in a state that allows for maintenance and inspection while suppressing increases in construction costs.

[0060] Furthermore, in the foundation structure 100 of the building of this embodiment, the top end of the concrete slab 116 is set lower than the top end of the rising portion 112 in the second section C2.

[0061] With this configuration, workability during pouring of the concrete floor 116, including trowel leveling, can be improved compared to when the top edge of the concrete floor 116 and the top edge of the rising portion 112 of the continuous footing 110 are at the same height in the second section C2. Also, workability during termite prevention treatment in the second section C2 can be improved by applying a sealing material S containing an anti-termite material to the joint between the rising portion 112 of the continuous footing 110 and the poured concrete floor 116.

[0062] In addition, in the foundation structure 100 of the building of this embodiment, an underfloor inspection opening 112a communicating with the first section C1 and the second section C2 is provided above the rising portion 112 where the first section C1 and the second section C2 are located on the left and right.

[0063] With this configuration, even if underfloor flooding occurs in the second compartment C2, which has a lower risk of underfloor flooding than the first compartment C1, the underfloor space US2 of the second compartment C2 can be inspected through the underfloor inspection opening 112a provided in the rising portion 112 of the continuous footing 110 between the second compartment C2 and the first compartment C1. Furthermore, water can be drained from the second compartment C2 to the first compartment C1 through the underfloor inspection opening 112a, which prevents water from accumulating on the concrete floor 116 of the second compartment C2.

[0064] Furthermore, in the foundation structure 100 of the building of this embodiment, in both the first section C1 and the second section C2, a plurality of hollow shaft members 117 are placed on the top end of the footing 111 of the continuous footing 110. The concrete floor concrete 116 is supported by a plurality of support members 119 made up of hollow concrete 118, in which the concrete that forms the concrete floor 116 is filled into the hollow of the shaft members 117 through openings at the top ends of the shaft members 117, and the shaft members 117.

[0065] When forming the foundation structure 100 of the building of this embodiment, after backfilling and compacting the first section C1 and the second section C2, ready-mixed concrete is poured to form the concrete slab 116. At this time, the ready-mixed concrete flows into the hollow of the shaft member 117 from the opening at the upper end of the shaft member 117 placed on the footing 111 provided at the lower end of the rising portion 112 of the continuous footing 110. As a result, multiple support members 119 consisting of the shaft member 117 and the hollow concrete 118 filled in the shaft member 117 are integrated with the concrete slab 116 of each of the first section C1 and the second section C2. This allows each concrete slab 116 to be supported by the multiple support members 119, thereby improving the strength of the foundation structure 100 of the building.

[0066] As can be understood from the above description, this embodiment can provide a foundation structure 100 for a building that enables reduction in construction costs and effective use of on-site generated surplus soil 115. Furthermore, this embodiment can provide a foundation structure 100 for a building that can secure underfloor space US1 for maintenance and inspection of equipment piping, including long equipment piping P1 and short equipment piping P2.

[0067] The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments. Various modifications, substitutions, etc. may be applied to the above-described embodiments without departing from the scope of the present invention. Furthermore, each of the features described with reference to the above-described embodiments may be combined as appropriate unless technically inconsistent. [Explanation of symbols]

[0068] 100 Building Foundations 110 Strip Foundation 111 Footing 112 Rising part 112a Underfloor inspection opening 115 Site generated soil 116 Concrete Floor 117 Shaft member 118 Hollow Concrete 119 Support member 120 Bundle material 130 joist 140 Pit Section C C1 Section 1 C2 Section 2 H Height P1 Long equipment piping P2 Short equipment piping US1 Underfloor space

Claims

1. A foundation structure of a building having a continuous footing with a rising portion, A plurality of compartments are provided, each of which is surrounded by the strip foundation; The plurality of compartments include a first compartment in which a long equipment pipe extending across other compartments is laid, and a second compartment in which no equipment pipe is laid or a short equipment pipe not extending across other compartments is laid, The second section contains on-site generated surplus soil and a concrete floor is poured on top of the on-site generated surplus soil, A foundation structure for a building, characterized in that a concrete floor is poured in the first section.

2. A beam is installed on the concrete floor in each of the first section and the second section, The bundles in the first section and the bundles in the second section are adjusted to have the same height, A joist is supported by the plurality of beams, and a floor material is supported by the joist, The foundation structure of a building described in claim 1, characterized in that in the first section, the long equipment piping is laid in the underfloor space provided between the floor material and the concrete floor and extends at a predetermined gradient.

3. When the short equipment piping is laid in the second section, The foundation structure of a building as described in claim 1, characterized in that a continuous pit is provided from the top of the concrete floor to the inside of the site-generated waste soil, and the short-length equipment piping is laid in the pit.

4. 2. The foundation structure of a building according to claim 1, wherein in the second section, the top end of the concrete slab is set lower than the top end of the rising portion.

5. The foundation structure of a building as described in claim 1, characterized in that an underfloor inspection opening communicating with the first compartment and the second compartment is provided above the rising portion where the first compartment and the second compartment are located on the left and right.

6. In both the first section and the second section, A plurality of hollow shaft members are placed on the top end of the footing of the continuous foundation, The foundation structure of a building as described in claim 1, characterized in that the concrete floor is supported by a hollow concrete member in which the concrete forming the concrete floor is filled into the hollow of the shaft member through the opening at the upper end of the shaft member, and a plurality of support members consisting of the shaft member.

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