JPH10168902A - Method and structure of reinforcing building foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing method and reinforcing structure, in which compressive reinforcement is executed by using reinforced concrete and a reinforcing bar in the foundation slab of an existing building foundation. SOLUTION: The reinforcing method has a process, in which a large number of horizontal holes 10c are formed at fixed places on the insides of the vertical sections 10b of a foundation 10 at regular intervals, and a process, in which one end sections of joint bars 14 are inserted and combined to each of the horizontal holes 10c and the other end section sides are extended into spaces on the insides of the vertical sections 10b of the foundation in a cantilever beam. The reinforcing method has a process, in which high-strength and superfluidized reinforced concrete 15, into which either organic or inorganic reinforcing fibers are mixed, is casted up to a height, where a large number of joint bars 15 are covered, in a region surrounded by the foundation 10, a process, in which recesses (d) with a specified sectional shape are formed horizontally in the longitudinal direction of the vertical sections 10b at the specified places of both side faces of the upper sections of the vertical sections 10b supporting external columns, and a process, in which long-sized reinforcing materials 16 are buried to each of the recesses and fixed to the vertical sections by fixing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation of a building, and more particularly to a method and a structure for reinforcing a foundation of a building for the purpose of strengthening the foundation of an existing wooden building.

[0002]

2. Description of the Related Art The foundation of a building is for safely supporting the building. For this purpose, the foundation must be fixed to the ground and have a solid structure. Various types of foundations are used depending on the condition of the ground, the structure of the building, and the difference in scale. This type is determined at the structural design stage based on the results of the ground survey.

Conventionally, two types of structures, a cloth foundation and a solid foundation, have been generally used as the foundation of a wooden building. A cloth foundation is a long continuous foundation, generally having an inverted T-shaped cross section, and is provided continuously along a foundation at the bottom of a building. The solid foundation means a plate-shaped foundation provided over the entire bottom of the building, and the weight of the building is supported by the entire area of the bottom plate-shaped foundation.

FIG. 8 is a cross-sectional view showing a conventional general cloth foundation and floor structure, and FIG. 9 is a perspective view showing a conventional general cloth foundation structure. The foundation 10 is made of concrete, has an inverted T-shaped cross section, and has a horizontal portion 10a for supporting a building.
And a vertical portion 10 integrally connected to the horizontal portion 10a at a right angle.
b. The foundation 10 is provided continuously along a foundation 20 at the bottom of the building. In addition, Basic 1
0 is provided with a cut-out portion 13 for providing an underfloor vent at a predetermined position. In the area surrounded by the foundation 10, concrete 1
1 are laid, and stones 12 for supporting a floor covering 24 described later are arranged at predetermined intervals.

A general floor structure provided on the foundation 10 in FIG. 8 is called a raised floor. The raised floor is provided with a base 20 disposed above the vertical portion 10 b supporting the outer pillar of the foundation 10, a large-scale 21 provided to extend over the base 20, and a vertical cross on the large-size 21. And a floor plate 23 spread on the joist 22. In addition, the eaves 21 is supported by the trowel 12 via the floor 24.

[0006]

[0005] Wooden buildings are used today only for small buildings such as houses. However, when looking at the number of annual buildings in Japan by structure, most of them are wooden buildings. Things. As one of the advantages of wooden buildings,
Modification and dismantling are easy. Therefore, extension and remodeling is performed on a daily basis even today. However, there are cases where the floor area of a wooden house or the like is increased due to the revision of the Building Standard Law. Specifically, a one-story building is two stories and a two-story building is three stories.
There are several problems when performing an extension work on a story. In particular, it was a question of whether the existing foundation of the building could tolerate the weight increase of the building to be added, and the building could not be added unless the foundation had sufficient strength.

In addition, the foundation of the building has a maximum bending moment at the center of the opening (gateway) at the center of the opening (gateway), regardless of the outer periphery and the interior, so that the foundation has a tensile load at the upper part and a compressive load at the lower part. Receive a load. Moreover, since the concrete is a material that is weak against tensile load, if the bending moment applied to the foundation increases due to extension or remodeling, it is necessary to reinforce this portion. Furthermore, in order to maintain the durability of the wood constituting the building, it is necessary to always provide a dry state. Therefore, it is required to provide underfloor ventilation ports having a predetermined area at regular intervals. In this notch, the strength of the foundation is significantly reduced, but in conventional wooden buildings, reinforcement measures have been taken in the notch of the foundation for some time, but when the upper load is increased, it is not sufficient. Therefore, when the load on the foundation is increased due to an extension or the like, it is necessary to take measures to reinforce the notch. Furthermore, in recent years, with the growing public interest in earthquakes, some people are concerned about the earthquake resistance of existing houses. For the above reasons, the development of a method that can easily and reliably reinforce the foundation of an existing building has been desired.

An object of the present invention is to provide a method for reinforcing a foundation of an existing building and a foundation reinforcing structure reinforced in such a manner in order to solve the above problems.

[0009]

According to a first aspect of the present invention, a foundation slab comprising a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at right angles to the horizontal portion is provided. A method of reinforcing a building foundation that receives a ground reaction force against the weight of an existing building by being continuously provided along a bottom base, wherein a plurality of the foundations are arranged at predetermined positions inside a vertical portion of the foundation at predetermined intervals. Providing a bottomed or penetrating horizontal hole, and inserting and connecting one end of a streak to each of the horizontal holes, and the other end side extending in a cantilever shape into the space inside the vertical portion of the foundation. A high-strength and high-fluidity reinforcing concrete mixed with an organic or inorganic reinforcing fiber in a region surrounded by the foundation. To cover the structure and pour it to the required height structurally And characterized in that it comprises a and.

According to a second aspect of the present invention, a foundation slab composed of a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at right angles is formed along the base at the bottom of the building. A method of reinforcing a building foundation that receives a ground reaction force against the weight of an existing building by being provided continuously, wherein a predetermined position of an upper side surface of the vertical portion that supports an outer column has Providing a recess having a predetermined cross-sectional shape horizontally in the longitudinal direction; and embedding a long reinforcing material in each of the recesses and fixing the reinforcing member to the vertical portion by fixing means. It is characterized by the following.

According to a third aspect of the present invention, a foundation slab composed of a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at right angles is formed along the base at the bottom of the building. A method of reinforcing a building foundation that receives a ground reaction force against the weight of an existing building by being provided continuously, wherein a predetermined position of an upper side surface of the vertical portion that supports an outer column has Providing recesses having a predetermined cross-sectional shape horizontally in the longitudinal direction, embedding a long reinforcing material in each of the recesses, and fixing the reinforcing member to the vertical portion by fixing means, and Attaching a long belt-shaped reinforcing band to the side surface.

According to a fourth aspect of the present invention, a foundation slab including a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at right angles is formed along a base at the bottom of the building. A method of reinforcing a building foundation that receives a ground reaction force against the weight of an existing building by being provided continuously, comprising a plurality of bottomed or penetrating holes at predetermined positions inside a vertical portion of the foundation at predetermined intervals. Forming a horizontal hole having a shape, and inserting and connecting one end of a reinforcing bar to each of the horizontal holes so that the other end side extends in a cantilever shape into a space inside the vertical portion of the foundation. In a region surrounded by the foundation, structural reinforcement is required by covering a large number of the reinforcing bars with high-strength and high-fluidity reinforcing concrete mixed with either organic or inorganic reinforcing fibers. Pouring to an appropriate height and the vertical Providing a recess having a predetermined cross-sectional shape horizontally in the longitudinal direction of the vertical portion at a predetermined position on both upper side surfaces of the portion; embedding a long reinforcing material in each of the recesses; It is characterized by comprising a step of fixing to a vertical portion and, if necessary, a step of attaching a long strip-shaped reinforcing band to a side surface of the vertical portion.

[0013] Claim 5 of the present invention is the above-mentioned claims 2 to 4.
In the invention described in any one of the above, the reinforcing material is formed in a rod shape using any one selected from a group of continuous fibers such as a reinforcing bar, a carbon fiber, an aramid fiber, and a glass fiber. It is characterized by the following.

According to a sixth aspect of the present invention, a foundation slab composed of a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at right angles is formed along the base at the bottom of the building. A reinforcing structure for a building foundation that receives a ground reaction force with respect to the weight of an existing building by being provided continuously, wherein a plurality of bottomed or penetrating shapes are provided at predetermined positions inside a vertical portion of the foundation at predetermined intervals. The horizontal hole is provided, and one end of a streak is inserted and connected to each of the horizontal holes, and the other end is extended in a cantilever shape into a space inside the vertical portion of the foundation, and is surrounded by the foundation. In addition, a high-strength and high-fluidizing reinforcing concrete mixed with an organic or inorganic reinforcing fiber is covered with a large number of the reinforcing bars and poured into a structurally necessary height. Features.

According to a seventh aspect of the present invention, a foundation slab composed of a horizontal portion supporting a building and a vertical portion integrally connected to the horizontal portion at right angles is formed along a base at the bottom of the building. By being provided continuously, it is a reinforcement structure of the building foundation that receives the ground reaction force against the weight of the existing building, at a predetermined position on the upper side surface of the vertical portion supporting the outer pillar,
A recess having a predetermined cross-sectional shape is provided horizontally in the longitudinal direction of the vertical portion, and a long reinforcing material is embedded in each of the recesses, and is fixed to the vertical portion by fixing means. .

According to an eighth aspect of the present invention, a foundation slab including a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at right angles is formed along a base at the bottom of the building. By being provided continuously, it is a reinforcement structure of the building foundation that receives the ground reaction force against the weight of the existing building, at a predetermined position on the upper side surface of the vertical portion supporting the outer pillar,
A recess having a predetermined cross-sectional shape is provided horizontally in the longitudinal direction of the vertical portion, a long reinforcing material is embedded in each of the recesses, fixed to the vertical portion by fixing means, and It is characterized in that a long strip-shaped reinforcing strip is attached to the side face.

According to a ninth aspect of the present invention, a foundation slab composed of a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at right angles is formed along the base at the bottom of the building. A reinforcing structure for a building foundation that receives a ground reaction force with respect to the weight of an existing building by being provided continuously, wherein a plurality of bottomed or penetrating shapes are provided at predetermined positions inside a vertical portion of the foundation at predetermined intervals. The horizontal hole is provided, and one end of a streak is inserted and connected to each of the horizontal holes, and the other end is extended in a cantilever shape into a space inside the vertical portion of the foundation, and is surrounded by the foundation. Then, a high-strength and high-fluidity reinforcing concrete mixed with an organic or inorganic reinforcing fiber is coated to a large number of the reinforcing bars and poured into a structurally necessary height, and the outer column is formed. At predetermined positions on the upper side surfaces of the vertical portion to be supported, Horizontally in the longitudinal direction of the straight section is provided a recess having a predetermined cross sectional shape, embedded reinforcements long to each of the recesses, is fixed to the vertical part by fixing means,
And, if necessary, a long strip-shaped reinforcing strip is attached to a side face of the vertical portion.

A tenth aspect of the present invention is the invention according to any one of the sixth to ninth aspects, wherein the reinforcing material is made of a reinforcing fiber, a continuous fiber such as a carbon fiber, an aramid fiber, or a glass fiber. It is characterized by being formed in a rod shape using any one selected from the group.

According to each of the above-mentioned inventions, after the reinforcing concrete is hardened, the foundation and the reinforcing concrete are firmly connected to each other, and a solid structure similar to that of the solid foundation can be obtained. Further, the reinforcing concrete mixed with the reinforcing fibers and having high strength sufficiently supports the increase in the load on the foundation due to the extension. The concrete for reinforcement of high fluidity flows with good fluidity to every corner inside the foundation of the existing building. In addition, the long reinforcing members provided on both side surfaces of the upper portion of the vertical portion of the foundation support the upper portion of the vertical portion where the tensile force is maximum, and prevent damage such as cracks of the foundation. At the same time, the reduction in strength due to the provision of the notch in the foundation is also reinforced.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for reinforcing a building foundation and a foundation reinforcing structure according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a building foundation for describing a first embodiment of the present invention. In the present embodiment, a large number of horizontal holes 10c are provided at predetermined positions at predetermined positions inside the vertical portion 10b of the foundation 10, and one end of the rod-shaped streak 14 shown in FIG. It is inserted and coupled to be supported in a cantilever manner on the vertical portion 10b of the foundation, and a high-strength and high-fluidity reinforcing concrete 15 mixed with reinforcing fibers is inserted into a region surrounded by the foundation 10. And pouring it to the required height for the reinforcing structure.

Hereinafter, the operation will be described in detail.
A hole is formed inside the vertical portion 10b of the “0” for inserting the streak 14. Processing is performed using a drill for concrete. Alternatively, holes are drilled using a short-height industrial robot. As shown in FIG. 2, the horizontal hole 10c is formed so as to be perpendicular to the vertical portion 10b of the foundation 10 and therefore horizontal. The diameter and the depth of the horizontal hole 10c are determined according to the streaks 14. The height position of the horizontal hole 10c is determined so as to be lower by a predetermined length than the surface of the reinforcing concrete 15 to be poured. FIG. 1 shows an example in which the reinforcing bar 15 is constructed so as to be arranged at a position of about の of the thickness of the reinforcing concrete 15. The number of the horizontal holes 10c, that is, the number of the reinforcing bars 14 inserted and fixed in the horizontal holes 10c is determined according to the required reinforcing strength of the reinforcing concrete 15.

Next, the streak 14 is inserted into the bored horizontal hole 10c.
Can be inserted and fixed using fixing means 18 such as an adhesive. When an adhesive is used, a synthetic resin adhesive is preferred because of its high adhesive strength, water resistance, heat resistance, durability, and chemical resistance. For example, there are vinyl resin-based, melamine resin-based, phenol-based, epoxy resin-based, cellulose-based, and furan resin-based adhesives. In addition, concrete can be used instead of the adhesive, and it may be physically fixed with a post-installed anchor.

In the present embodiment, the piercing rod shown in FIG. The reinforcing rod is a deformed reinforcing bar 1 having a predetermined length with irregularities formed on the outer peripheral surface.
4b and a sleeve 14a fixed to one end of the reinforcing bar. By inserting a sleeve 14a into a horizontal hole 10c formed in the foundation 10, the streak 14 can be formed without using a fixing means such as an adhesive.
b can be fixed in a cantilever shape. This allows
Most of the deformed reinforcing bars 14 b of the splint 14 project substantially horizontally into the space surrounded by the foundation 10.

The first stage of the operation procedure will be described below. In the preferred embodiment shown, the wooden floor 24 is first removed and replaced with a metal support 30. FIG.
The support 30 shown in FIG. 3 includes a thin plate-like base 33 placed on the shackle 12, a male screw 33b fixed upright on the base 33, and a large floor 21 of the building floor. It comprises a supporting portion 32 for supporting, a male screw portion 32b fixed upright below the receiving portion 32, and a rotating body 31 screwed to the male screw portion 32b and the male screw portion 33b. The external thread portion 32b and the external thread portion 33b are threaded in the opposite directions, so that when the rotating body 31 is rotated like the turnbuckle, the receiving portion 32 moves up and down with respect to the base 33.

The base 33 is a concrete base.
A hole 33a for fixing to the stone 12 using a nail or the like.
Can be provided. The receiving portion 32 has an L-shape to facilitate attachment to the large bar 21. Also, a hole 32a for fixing the receiving portion 32 to the large-scale pulling 21 using a nail.
Can be provided. On the outer periphery of the center of the rotating body 31,
A grasping portion 31a for grasping and rotating the rotating body 31 with a tool such as a spanner is provided.

As the replacement procedure, from the state shown in FIG. 8, roots, diagonal materials, etc. are removed, and the scaffolds 25 or nails fixing the floor or 24 are removed, and the floor or floor is removed.
To remove. Then, the support 30 shown in FIG. 7 is placed on the holding stone 12, and the grasping portion 31 a is rotated using a tool until the receiving portion 32 is pressed against the large-scale pull 21. Finally, a fixing means such as a screw, a nail or a rod is used to fix the hole 32a provided in the receiving portion 32 and the hole 33a provided in the base 33. By replacing the floor of the building with the support 30, the structure for supporting the floor becomes stronger.

Next, the concrete for reinforcement is poured into the upper surface of the interstitial concrete 11 and cast to a thickness that covers the reinforcing rod 14. Thus, the reinforcing concrete 15 completely covers the streaks 14 and covers the lower part of the support 30, that is, the lower parts of the base 33 and the male screw part 33 b. Therefore, after the reinforcing concrete 15 is hardened, the lower part of the support 30 is also firmly fixed to the reinforcing concrete 15.

The concrete 1 for reinforcement in the present embodiment
5 is a high-strength concrete that has been previously kneaded and mixed with a fluidizing agent as an admixture in order to increase the fluidity without impairing the strength durability. Any of inorganic reinforcing fibers, for example, a mixture of vinylon fibers is used. Since the reinforcing concrete 15 has a high fluidity, it can be poured into a predetermined thickness without forming a gap or a void over the whole by being poured from the ventilation notch 13 provided in the foundation 10.

As a result of the above construction, the weight of the building is supported by the foundation 10 and the reinforcing concrete 15 firmly fixed to the foundation 10 via a number of reinforcing bars 14.

Next, the second stage of the work procedure will be described. First, referring to FIG. 2, a recess 10d having a predetermined cross-sectional shape is formed in a predetermined position on both upper side surfaces of the vertical portion 10b of the foundation 10 horizontally in the longitudinal direction of the vertical portion 10b using a diamond cutter or the like. I do. The recess 10 d is formed through a notch 13 formed as a below-floor ventilation opening of the foundation 10.

Next, as shown in FIG. 4, an adhesive resin serving as a fixing means 19 is first put in the recess 10d, and then a bar-shaped reinforcing member 16 is fitted. As the reinforcing material 16, it is preferable to use a material having high tensile strength and low elongation under a tensile load, such as reinforcing steel, aramid fiber, glass fiber, and carbon fiber.

As described above, the foundation 10 and the reinforcing material 16
Is fixed using the fixing means 19 made of an arbitrary adhesive. An epoxy resin, a polyimide resin, a urethane resin, or the like is used as the adhesive. A long reinforcing material 16 provided on both upper side surfaces of the vertical portion 10b of the foundation 10
This supports the upper part of the vertical portion 10b where the tensile force is maximum, thereby effectively preventing damage such as cracking of the foundation made of concrete. Further, the reinforcing member 16 is formed as shown in FIG.
Since it is provided through the notch 13 as shown in FIG. 2A, it is possible to simultaneously compensate for a decrease in strength due to the provision of the notch 13.

Next, FIG. 3 is a perspective view of a foundation slab after a method of reinforcing a building foundation according to a third embodiment of the present invention. In this embodiment, the vertical portion 10b of the foundation 10 is different from the bottomed horizontal hole 10c in FIG.
Drilling for inserting the streaks 14 is performed from the outside in a penetrating manner. That is, the drilling is performed from the outdoor side using a concrete drill or an industrial robot having a short height.
Then, the same adhesive as described above is put in the horizontal hole 10c, and then the reinforcing bar 1 without the sleeve 14a is inserted.
4 is inserted from the outdoor side to the indoor side in a penetrating manner. as a result,
Work efficiency can be dramatically improved compared to underfloor work.

In FIG. 3, the vertical portion 10 of the foundation 10 is shown.
On both side surfaces of b, a long strip-shaped reinforcing band 17 is attached in a state where the reinforcing member 16 is fixed to the recess 10d or without the reinforcing member 16 or the like. This reinforcing strip 17
Is not limited to one, and a plurality of strips may be stuck up and down, or may be stuck only to the outside. This reinforcing strip 1
7 is attached with the adhesive resin as the fixing means 19,
It is preferable to use a material such as aramid fiber, glass fiber, or carbon fiber having high tensile strength and low elongation with respect to tensile load. As described above, by reinforcing the foundation 10 with the reinforcing material 16 and the reinforcing band 17, the concrete foundation is cracked against the tensile force generated by the compressive force due to the house weight in a synergistic manner. Such damage can be effectively and reliably prevented.

[0035]

The reinforcing method and the reinforcing structure for a building foundation according to the first aspect of the present invention are characterized in that a number of horizontal holes are provided at predetermined positions inside a vertical portion of the foundation at predetermined intervals, and One end is inserted and connected so that it cantileverly supports the vertical portion of the foundation, and a high-strength and high-fluidity reinforcing concrete mixed with reinforcing fibers is inserted into the area surrounded by the foundation. After the reinforcing concrete has hardened, the foundation and the reinforcing concrete must be connected to each other firmly and have a solid structure similar to that of the solid foundation. There is an effect that can be. Further, since the reinforcing concrete contains high-strength fibers mixed with reinforcing fibers, it is possible to sufficiently support an increase in the load on the foundation due to the extension. Further, the reinforcing concrete having a high fluidity flows into every corner inside the foundation of the existing building with good fluidity, and has an effect of enabling the joint between the foundation and the reinforcing concrete without gaps.

The reinforcing method and the reinforcing structure for a building foundation according to the second aspect of the present invention are characterized in that a recess is provided horizontally in a longitudinal direction at predetermined positions on both upper sides of a vertical portion supporting an outer column, and the recess is provided. In order to embed a long reinforcing material in each of the above and fix it to the vertical part by the fixing means, the long reinforcing material provided on both upper side surfaces of the vertical part of the foundation, the upper side of the vertical part where the tensile force is the maximum Has the effect of preventing breakage such as cracks in the foundation.

From the above, according to the present invention, the floor area can be increased by performing additional construction work such as making a one-story building such as a wooden house a two-story building and a two-story building a three-story building. Furthermore, since the supporting structure is the same as that of the solid foundation, it is possible to greatly improve the earthquake resistance against an earthquake.

[Brief description of the drawings]

FIG. 1 is a sectional view of a foundation after construction in a method for reinforcing a building foundation according to the present invention.

FIG. 2 (a) is a perspective view of a foundation slab after a method of reinforcing a building foundation according to a second embodiment of the present invention,
(B) is a perspective view of the base slab in the state before embedding the reinforcing material of (a).

FIG. 3 is a perspective view of a foundation slab after a method of reinforcing a building foundation according to a third embodiment of the present invention.

FIG. 4 is a partially enlarged sectional view of the base slab shown in FIGS.

FIG. 5 is a front view of a reinforcing rod used in the method of reinforcing a building foundation according to the present invention.

FIG. 6 is a perspective view of the foundation after construction in the method for reinforcing a building foundation according to the present invention.

FIG. 7 is a perspective view of one embodiment of a support used in the method for reinforcing a building foundation according to the present invention.

FIG. 8 is a cross-sectional view of a conventional general building foundation.

FIG. 9 is a perspective view of a conventional general building foundation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Foundation 10a Horizontal part 10b Vertical part 10c Horizontal hole 10d Concave part 11 Soil concrete 12 Grass stone 13 Notch part 14 Reinforcing rod 14a Sleeve 14b Deformed bar 15 Reinforcement concrete 16 Long reinforcing material 17 Reinforcing band Reference Signs List 20 base 21 large pull 22 joist 23 floor plate 24 floor 25 gutter 30 support 31 rotating body 31a gripping part 32 receiving part 32a hole 32b male screw part 33 base

Claims (10)

[Claims] 1. A foundation slab comprising a horizontal part supporting a building and a vertical part integrally connected to the horizontal part at a right angle, is provided continuously along a base at the bottom of the building. Is a method for reinforcing a building foundation that receives a ground reaction force against the weight of an existing building, wherein a number of bottomed or penetrating horizontal holes are provided at predetermined intervals inside a vertical portion of the foundation at predetermined intervals. A step of inserting and connecting one end of a streak to each of the horizontal holes and extending the other end side in a cantilever manner into a space inside a vertical portion of the foundation, and A high-strength, high-fluidity reinforcing concrete mixed with an organic or inorganic reinforcing fiber is coated in the enclosed area to cover a large number of the reinforcing bars, and is poured to a structurally necessary height. And a process comprising: Reinforcement methods of building foundation. 2. A base slab comprising a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at a right angle, the base slab being provided continuously along the base at the bottom of the building. A method for reinforcing a building foundation that receives a ground reaction force against the weight of an existing building, comprising: a predetermined position on an upper side surface of the vertical portion that supports an outer pillar; A step of providing a recess having a cross-sectional shape of: and a step of embedding a long reinforcing material in each of the recesses and fixing the reinforcing member to the vertical portion by fixing means. How to reinforce the material foundation. 3. A foundation slab comprising a horizontal portion supporting a building and a vertical portion integrally connected at a right angle to the horizontal portion is continuously provided along a base at the bottom of the building. A method for reinforcing a building foundation that receives a ground reaction force against the weight of an existing building, comprising: a predetermined position on an upper side surface of the vertical portion that supports an outer pillar; Providing a recess having a cross-sectional shape of: and embedding a long reinforcing material in each of the recesses, and fixing to the vertical portion by a fixing means, and a long strip-shaped on the side surface of the vertical portion A method for reinforcing a building foundation, comprising: attaching a reinforcing band. 4. A base slab comprising a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at a right angle, the base slab being provided continuously along the base at the bottom of the building. Is a method for reinforcing a building foundation that receives a ground reaction force against the weight of an existing building, wherein a number of bottomed or penetrating horizontal holes are provided at predetermined intervals inside a vertical portion of the foundation at predetermined intervals. A step of inserting and connecting one end of a streak to each of the horizontal holes and extending the other end side in a cantilever manner into a space inside a vertical portion of the foundation; A high-strength and high-fluidity reinforcing concrete mixed with an organic or inorganic reinforcing fiber into a region where the reinforcing fibers are mixed and covered with a large number of the reinforcing bars and poured into a structurally necessary height. The upper side of the vertical part supporting the outer column Providing, at predetermined positions, recesses having a predetermined cross-sectional shape horizontally in the longitudinal direction of the vertical portion, and embedding a long reinforcing material in each of the recesses, and fixing to the vertical portion by fixing means. And, if necessary, a step of attaching a long belt-like reinforcing band to the side surface of the vertical portion. A method of reinforcing a building foundation, comprising: 5. A reinforcing material, carbon fiber,
5. A method according to any one of claims 2 to 4, characterized in that it is formed in a rod shape using any one selected from the group of continuous fibers such as aramid fiber and glass fiber. To reinforce building foundations. 6. A base slab comprising a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at a right angle, the base slab being provided continuously along a base at the bottom of the building. Thereby, a reinforcing structure of a building foundation that receives a ground reaction force against the weight of an existing building, provided with a number of bottomed or penetrating horizontal holes at predetermined intervals at predetermined positions inside the vertical portion of the foundation, Insert one end of the streak into each of the horizontal holes and extend the other end side in a cantilever manner into the space inside the vertical part of the foundation, and in the region surrounded by the foundation, organic or inorganic A building foundation characterized in that a high-strength and high-fluidity reinforcing concrete mixed with any one of the reinforcing fibers of the system is covered with a large number of the reinforcing bars and poured into a structurally necessary height. Reinforcement structure. 7. A foundation slab comprising a horizontal portion supporting a building and a vertical portion integrally connected at a right angle to the horizontal portion is continuously provided along a base at the bottom of the building. According to the reinforcing structure of the building foundation receiving the ground reaction force against the weight of the existing building, at a predetermined position on the upper side surface of the vertical portion supporting the outer column, a predetermined horizontal in the longitudinal direction of the vertical portion A reinforcing structure for a building foundation, comprising a recess having a cross-sectional shape, a long reinforcing material embedded in each of the recesses, and fixed to the vertical portion by fixing means. 8. A base slab comprising a horizontal portion for supporting a building and a vertical portion integrally connected to the horizontal portion at a right angle, the base slab being provided continuously along the base at the bottom of the building. According to the reinforcing structure of the building foundation receiving the ground reaction force against the weight of the existing building, at a predetermined position on the upper side surface of the vertical portion supporting the outer column, a predetermined horizontal in the longitudinal direction of the vertical portion A recess having a cross-sectional shape is provided, a long reinforcing material is embedded in each of the recesses, fixed to the vertical portion by a fixing means, and a long strip-shaped reinforcing band is stretched on a side surface of the vertical portion. Reinforcement structure of building foundation characterized by wearing. 9. A foundation slab comprising a horizontal portion for supporting a building and a vertical portion integrally connected at a right angle to the horizontal portion is provided continuously along a base at the bottom of the building. Thereby, a reinforcing structure of a building foundation that receives a ground reaction force against the weight of an existing building, provided with a number of bottomed or penetrating horizontal holes at predetermined intervals at predetermined positions inside the vertical portion of the foundation, Insert one end of the streak into each of the horizontal holes, extend the other end side in a cantilever shape into the space inside the vertical part of the foundation, and in an area surrounded by the foundation, organic or inorganic A high-strength and high-fluidity reinforcing concrete mixed with any of the reinforcing fibers of the system, covering a large number of the reinforcing bars, poured into a structurally necessary height, and the upper part of the vertical portion supporting the outer column At predetermined positions on both sides, in the longitudinal direction of the vertical part A recess having a predetermined cross-sectional shape is provided flat, a long reinforcing material is embedded in each of the recesses, and is fixed to the vertical portion by a fixing means, and, if necessary, a long side is provided on a side surface of the vertical portion. A reinforcing structure for a building foundation, comprising a belt-like reinforcing band attached. 10. The reinforcing member formed in a rod shape using any one selected from a group of continuous fibers such as a reinforcing fiber, carbon fiber, aramid fiber, and glass fiber. Item 10. A reinforcing structure for a building foundation according to any one of Items 6 to 9.