JP2003096791A - Foundation structure of building, foundation formation using the same and its construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a construction period and reduce a cost by lessening ditches which must be excavated to foundation ground and dispensing with temporary frames for placing concrete in a foundation structure of a building, foundation formation using it and its construction method. SOLUTION: The ditch 3 is excavated in only an area along the neighborhood of an external circumference of a floor face shape of the building for the foundation ground 1, and concrete foundation blocks 2 unitized in the ditch 3 are connected and assembled. Bar arrangements 5, 6 are combined on improved ground 4b produced between an outside wall 2a and an inside wall of the block 2 and inward of the block to place concrete 18 so as to bury these bar arrangements, and an upper face of the concrete is at a prescribed height or higher than a ground level. The temporary frames arranged for placing concrete 18 are not needed and temporary installation can be saved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic structure of a building, a basic structure using the same, and a construction method thereof.

[0002]

2. Description of the Related Art Conventionally, in the basic structure of a building or its construction method, there is an underfloor space between the basic structure itself provided on the ground and the building. In the foundation structure, a groove of a predetermined depth is excavated along the area where the foundation of the building is placed with respect to the foundation ground, and the inner ground surface surrounded by the groove is also at the ground level ( GL) is excavated to a predetermined depth (shallowness shallower than the groove), crushed stones and / or crushed stones are compacted on the groove and the ground inside it, and vertical reinforcement is provided above the groove and at other positions on the upper surface And the slab reinforcement is assembled, the temporary frame is arranged along the vicinity of both side surfaces of the vertical reinforcement installed at the position of the groove,
Concrete is struck to embed these vertical bars,
Furthermore, after removing the temporary frame, it is said that concrete was struck to embed the slab reinforcement.

[0003]

However, in the above-mentioned conventional foundation structure of a building or its construction method, the foundation of the building is placed on the foundation ground for the construction of the foundation structure. It is necessary to excavate trenches and ground all over the area, the amount of excavation is large, and it is necessary to dispose temporary frames along the vicinity of both sides of the trench. However, the construction period was prolonged and the cost was high. Furthermore, since there is an underfloor space between the basic structure itself and the building, it is necessary to have a configuration for underfloor ventilation and measures against termites.

The present invention has been made in order to solve the above-mentioned problems, and the number of grooves and ground that must be excavated in the foundation ground is small, and the excavated soil does not need to be carried out to the outside. , A foundation structure of a building that can be used for ground improvement, and that can reduce the labor and time of installing a temporary frame that is arranged for pouring concrete, shorten the construction period and reduce cost, and The purpose is to provide the basic structure used and its construction method.

[0005]

In order to achieve the above object, the invention according to claim 1 has a united predetermined length having an outer wall with a high height, an inner wall with a low height, and a bottom surface. Consists of a concrete foundation block, for connecting a plurality of said blocks in the longitudinal direction at appropriate height positions in the vicinity of both sides of the outer wall and / or the inner wall of this concrete foundation block by using a connecting metal fitting or the like. It is a basic structure of a building provided with holes for connection.

In the above-mentioned foundation structure of a building, a plurality of concrete foundation blocks are connected along the vicinity of the outer periphery of the floor shape of the building, and between the outer wall and the inner wall of these connected blocks, Also, a deck structure can be formed by assembling reinforcing bars on the ground inside the blocks continuously connected to the blocks, and by staking concrete so as to embed the reinforcing bars. Since the concrete frame is no longer required for this concrete pouring, it is possible to significantly reduce the labor and time for installing the temporary frame.

Further, in the invention according to claim 2, a groove having a predetermined depth is excavated along the vicinity of the outer periphery of the floor shape of the building with respect to the foundation ground, and crushed stone having a predetermined thickness and / Or crushed stone or soil stabilization material is rolled to produce improved ground, and the upper surface of the improved ground in the groove is a unit having a tall outer wall, a low inner wall and a bottom surface. A plurality of concrete foundation blocks having a predetermined length are connected in the longitudinal direction and assembled, and crushed stones and / or rubble stones or soil stabilization treatment are formed on the ground inside the connected concrete foundation blocks up to the height of the inner wall. The improved ground is generated by rolling the material, and the reinforcing bar is formed between the outer wall and the inner wall of the concrete foundation block and continuously to the inner part of the block so that the reinforcing bar is embedded. To Nkurito and is struck, a substructure of a building the upper surface of the concrete is to be above ground level at a predetermined height position.

In the above-mentioned foundation structure, excavation of the trench or the ground to the foundation ground is required only in the region along the outer periphery of the floor shape of the building (the ground excavation inside the foundation ground surrounded by the groove is necessary if necessary). Just excavate slightly shallower),
The amount of excavation of trenches and ground will be significantly smaller than when excavating all of the conventional base positions. In addition, united concrete foundation blocks should be connected and assembled, and reinforcement should be embedded between the outer and inner walls of this concrete foundation block and on the improved ground generated inside the block so that this reinforcement should be embedded. Since the concrete is struck, the temporary frame provided for smashing the concrete is not required, and the temporary frame installation can be saved. In addition, by setting the upper surface of the concrete at a predetermined height above the ground level, it is possible to provide a foundation structure on which a building can be placed without having an underfloor space.

Further, according to the invention of claim 3, a groove having a predetermined depth is excavated along the vicinity of the outer periphery of the floor shape of the building with respect to the foundation ground, and crushed stone having a predetermined thickness and And / or a step of generating improved ground by rolling a stone or a soil stabilization material, and a unit having a tall outer wall, a low inner wall and a bottom surface on the upper surface of the improved ground in the groove. A step of connecting a plurality of concrete concrete blocks having a predetermined length in the longitudinal direction and assembling, and crushing stones and / or rubble stones on the ground inside the connected concrete foundation blocks up to the height of the substantially inner wall, or A step of generating improved ground by rolling the soil stabilization material, and a step of forming reinforcement between the outer wall and the inner wall of the concrete foundation block and continuously to the improved ground inside the block. And-up consists of a step of hitting the concrete to fill the reinforcement, a substructure construction methods of building to allow the upper surface of the concrete is made of ground level at a predetermined height position.

In the above-mentioned foundation structure construction method, claim 2
The same effect as that of the invention can be obtained.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A basic structure of a building, a basic structure using the same and a construction method therefor according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross section of a foundation structure completed by applying this construction method. The builder excavates a groove 3 having a predetermined width and a predetermined depth (about 500 mm) from the ground level GL along the vicinity of the outer periphery of the floor shape of the building on the foundation ground 1. The inner surface 12 of the foundation ground 1 surrounded by the groove 3 is also excavated almost entirely so as to be slightly lower than the ground level GL (about 150 mm). It should be noted that the illustrated length numeral display (unit: mm) is an example.

The improved ground 4a having a predetermined thickness is formed in the trench 3 excavated as described above. The improved ground 4a is formed by rolling the crushed stone and / or the crushed stone or the soil stabilization treatment material (cement-based ground improvement material). This thickness is 250
It is about mm. Then, on the upper surface of this improved ground 4a,
A plurality of unitized concrete foundation blocks 2 having a predetermined length are connected in the length direction and assembled. Foundation Structure of Building This concrete foundation block 2 has a tall outer wall 2a, a short inner wall 2b, and a bottom surface 2c.

Next, the inner face 1 of the groove 3 which is the inner face surrounded by the connected concrete foundation blocks 2
The improved ground 4b is generated by rolling the crushed stone and / or the crushed stone to the height of the inner wall 2b on the ground of No. 2 as well.
The thickness of the improved ground 4b is about 400 mm, which is about 250 mm higher than the ground level GL. The upper end of the tall outer wall 2a of the concrete foundation block 2 is about 400 mm above the ground level GL.

Next, in the space between the outer wall 2a and the inner wall 2b of the concrete foundation block 2, and continuously on the improved ground 4b inward of the block, longitudinal reinforcement 5 is arranged in the vertical direction, and slab reinforcement is arranged in the horizontal position. Form 6. Furthermore, these bar arrangements 5,
Hit concrete 18 so that 6 is embedded. The horizontal upper surface of the concrete 18 is located at a predetermined required height (about 400 mm) above the ground level GL.
After the concrete 18 is hit, the outer peripheral space of the foundation structure by excavating the trench may be filled with soil.

The foundation structure thus constructed has a deck structure, and a building can be placed on the concrete 18 without having an underfloor space. Although not shown, an anchor for fixing the base of the building is provided at an appropriate position on the upper surface of the concrete 18.

FIG. 2 shows an example of the entire plane of the basic structure.
In the foundation structure, a plurality of concrete foundation blocks 2 are connected along the outer periphery of the floor shape of a building, and concrete foundation blocks 21 for it are arranged at the corners.

FIG. 3 shows the appearance of the concrete foundation block 2, and FIGS. 4 (a) and 4 (b) show the concrete foundation block 2.
2 shows a lateral cross section and an outer side surface of FIG. Concrete foundation block 2
The lengthwise dimension of is approximately 900 mm. Further, the height difference between the tall outer wall 2a and the short inner wall 2b is 15
It may be about 0 mm. The bottom surface portion 2c extends slightly toward the inner wall 2b. A hole 2d for connection with an adjacent block is provided in the vicinity of both sides of the outer wall 2a and the inner wall 2b of the concrete foundation block 2 at the same height position slightly above the middle in the height direction. Bolts are inserted into each of the connecting holes 2d, and at the time of construction, wires are hooked on these bolts to lift the concrete foundation block 2 by a heavy machine. Further, the adjacent blocks are connected to each other by the plate-like connecting fitting 19 (FIG. 3) and the bolts. Vertical grooves 2e are provided on the outer wall 2a of the concrete foundation block 2 at appropriate intervals. This vertical groove 2e
Is effective for improving the appearance when a plurality of blocks 2 are connected. A hole 2f and a tapered opening 2g are formed in the bottom surface portion 2c. These are effective for positioning with respect to the improved ground 4a.

FIG. 5 shows another example of the concrete foundation block 2. This concrete foundation block 2 is formed by combining two L-shaped blocks and connecting them with bolts to form a tall outer wall 2a, a short inner wall 2b, and a bottom portion 2c. In this structure, a simple mold for producing the concrete foundation block is sufficient, and the concrete foundation block can be produced at low cost.

In the foundation structure construction method according to the above-mentioned embodiment, since the trench 3 needs to be excavated only in the area along the outer periphery of the floor shape of the building with respect to the foundation ground 1, the excavation amount of the trench 3 is the same as in the conventional method. This is much less than when excavating all the base positions. Further, since it is not necessary to provide a temporary frame for hitting the concrete 18, the labor can be greatly reduced. Further, the ground inside the foundation ground 1 surrounded by the groove 3 is to be excavated slightly shallowly even if it is excavated.
Without having an underfloor space, by setting the upper surface of the concrete 18 hit on b (crushed crushed stone and / or crushed stone, or soil stabilization treatment material) to a predetermined height or more above the ground level GL of the foundation ground 1. You can put buildings on it. And since there is no underfloor, there is no need for ventilation structure or termite countermeasures.

Further, since a plurality of connected concrete foundation blocks 2 and concrete 18 form a deck-like foundation structure via the reinforcing bars 5 and 6, the stability to the ground is enhanced. In addition, the concrete 1 can be formed without increasing the thickness of the concrete 18 and the improved ground 4b (crushed stone and / or rubble 4) arranged on the upper surface of the inner surface 12 of the groove 3.
8 The upper surface can be made to have a height necessary for the ground level GL. In addition, due to its structure, it has good slippery properties and good corrosion resistance of the reinforcing bars. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made.

[0021]

As described above, according to the present invention, (1) Excavation of a groove in a foundation ground is required only in an area along the outer periphery of the floor surface shape of a building (inward foundation ground surrounded by the groove). Since it is only necessary to excavate the ground slightly shallower as necessary), the amount of excavation of trenches and ground is significantly smaller than before, reducing the labor and time of excavation, shortening the construction period, and reducing the construction period. Cost can be reduced. (2) Since the unitized concrete foundation blocks are connected and assembled, a temporary frame arranged to cast concrete is unnecessary. As a result, the labor and time for installing the temporary frame can be reduced, and the construction period can be shortened and the cost can be reduced. (3) The ground inside the foundation ground surrounded by the trench is only excavated slightly shallowly even if excavated, and the concrete upper surface hit on the improved ground is at a predetermined height or more above the ground level of the foundation ground. Therefore, it is possible to obtain a basic structure on which a building can be placed without having an underfloor space.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a foundation structure using a foundation structure of a building according to an embodiment of the present invention.

FIG. 2 is a plan view of the basic structure.

FIG. 3 is a perspective view of a concrete foundation block forming the foundation structure.

4A and 4B are a side view and an outer side view of the basic block.

FIG. 5 is a side view showing another example of the basic block.

[Explanation of symbols]

1 foundation ground 2 concrete foundation block (foundation structure) 2a tall outer wall 2b low inner wall 2c bottom portion 2d connecting hole 3 groove 4a, 4b improved ground with crushed stone and / or crushed stone, or Soil stabilization material 5 Vertical reinforcement 6 Slab reinforcement 12 Inner surface 18 Concrete

Claims (3)

[Claims] 1. A concrete foundation block having a unit length and having an outer wall of a tall height, an inner wall of a short height and a bottom portion, and both sides of an outer wall and / or an inner wall of this concrete foundation block. A basic structure of a building, characterized in that a connecting hole for connecting a plurality of the blocks in the lengthwise direction by using a connecting fitting or the like is provided at an appropriate height position near the portion. . 2. A groove having a predetermined depth is excavated along the vicinity of the outer periphery of the floor shape of a building with respect to the foundation ground, and crushed stones and / or rubble stones having a predetermined thickness, or a soil stabilization material is provided in the groove. The improved ground is generated by rolling, and on the upper surface of the improved ground in the groove, a unitized concrete foundation block having a united predetermined length having a tall outer wall, a short inner wall and a bottom portion is formed. A plurality of crushed stones and / or rubble stones, or soil stabilization treatment materials are compacted to the height of the inner wall on the ground inside the connected concrete foundation blocks so as to improve the ground. Generated between the outer and inner walls of the concrete foundation block,
And, continuous reinforcement is built on the improved ground inside the block, concrete is struck to embed the reinforcement, and the upper surface of this concrete is positioned at a predetermined height above the ground level. The basic structure of a building characterized by 3. A groove having a predetermined depth is excavated from the foundation ground along the vicinity of the outer periphery of the floor shape of a building, and crushed stone and / or rubble stone having a predetermined thickness or a soil stabilization material is provided in the groove. A step of generating improved ground by compacting, and on the upper surface of the improved ground in the groove, a unitized concrete foundation of a predetermined length having an outer wall of a tall height, an inner wall of a short height and a bottom surface. By assembling a plurality of blocks connected in the lengthwise direction, by crushing crushed stones and / or rubble stones or a soil stabilization material up to the height of the inner wall on the ground inside the connected concrete foundation blocks Generating improved ground, between an outer wall and an inner wall of the concrete foundation block,
And a step of continuously forming rebar on the improved ground inside the block, and a step of striking concrete so as to embed the rebar, so that the upper surface of the concrete is at a predetermined height position above the ground level. The basic structure construction method of the building characterized by the following.