JP2001279687A - Structure of slab-shaped foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for a foundation capable of effectively utilizing surplus soil generated by boring an excavation groove. SOLUTION: In a slab-shaped foundation 1 provided with a concrete riser part 4 rising from an inner part of the excavation groove 2 formed in the ground 6, and a concrete foundation slab 5 formed on banking 3 provided on the ground outside the excavation groove 2, the riser part 4 and the foundation slab part 5 being integrally formed of concrete 8 to have a level top surface, the banking 3 contains the surplus soil generated by boring the excavation groove 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a slab-type foundation structure.

[0002]

2. Description of the Related Art In the construction of a foundation of a building such as a house, for example, it is sometimes difficult to dispose of the residual soil generated by excavation of a root cutting groove. An object of the present invention is to provide a foundation structure that can effectively use the remaining soil.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is to provide a concrete part which rises from the inside of a grooving groove formed in the ground and a concrete formed on an embankment laid on the ground outside the grooving groove. A foundation slab is provided, and the rising portion and the foundation slab are a slab-type foundation structure that is provided by being integrally cast with concrete and flush with the top surface, and the embankment is formed by a root trench. The problem is solved by a structure of a slab-type foundation characterized by including a surplus soil generated by excavation (first invention).

[0004] In this foundation, since the remaining soil generated by excavation of the kerf is used as embankment to be laid on the ground outside the kerf, the residual soil generated by digging of the kerf is used for constructing the foundation. It can be used effectively, and can solve the conventional problem of having trouble with the remaining soil treatment.

In addition, the present slab-type foundation has a structure in which an embankment is provided under the foundation slab to prevent the thickness of the foundation slab from becoming unnecessarily large. As the soil for use, the remaining soil generated by excavation of the root ditches is used, so that not only the amount of concrete required for forming the foundation slab can be reduced, but also the formation of the embankment thereunder The amount of soil separately prepared can also be reduced or eliminated, and the base slab can be formed cost-effectively.

[0006] In addition, since the remaining soil generated by excavation of the root cutting groove need only be piled on the ground outside the root cutting groove, the remaining soil can be easily transported.

[0007] Also, since a base slab is provided,
Since the foundation that is unlikely to cause differential settlement can be realized, and the rising part and the foundation slab are provided with the top surface flush with concrete, the formwork is installed only on the outer surface side of the rising part and the foundation The ability to cast concrete to simplify the formwork work, and improve the workability of the construction of the upper structure because the top surface of the rising part and the top surface of the foundation slab are flush. It goes without saying that things can be done.

In the above-mentioned slab-type foundation, a base is provided on a top surface of the rising portion, and the base protrudes at the same level as the height of the top surface of the foundation concrete or higher, and is driven after the base is installed. It is preferable to be embedded in the foundation concrete and exposed to the top surface of the rising portion (second invention).

In other words, the base is not mounted afterwards on the top surface of the foundation concrete, but is embedded in the foundation concrete that has been driven in after the foundation is installed. The base can be accurately provided on the top surface of the rising portion.
In addition, since the upper structure or another base can be connected with high precision through this base, the labor and time required for finishing the top surface of the foundation concrete can be reduced. It should be noted that the second invention can be effectively used for various foundations that do not assume the first invention.

In addition, a base is provided on the top surface of the rising portion, and the base protrudes at the same or higher than the height position of the top surface of the base concrete, and also serves as a formwork of the base concrete. It may be provided in a state of being in contact with the later-implanted foundation concrete and exposed to the top surface of the rising portion (third invention).

That is, since the base is not attached to the top surface of the base concrete as a retrofit, but is provided in contact with the base concrete driven in after the base is installed, the base is provided. Also in this case, the base can be provided with high accuracy on the top surface of the rising portion. In addition, since the upper structure or another base can be connected with high precision through this base, the labor and time required for finishing the top surface of the foundation concrete can be reduced. In addition, since the base also serves as a formwork for driving the foundation concrete, the amount of the dedicated formwork required for driving the foundation concrete can be reduced. Note that the third invention can also be effectively used for various foundations not premised on the first invention.

In the second and third inventions, when the anchor is connected to the base (fourth invention), not only can the base be firmly connected to the base concrete, but also the base concrete can be connected to the base concrete. Since the anchor can be connected to the base before the driving, the problem of mounting accuracy of the anchor to the base concrete, which occurs when the base is mounted after the base concrete is driven, can be eliminated.

[0013] Further, a steel rising core beam is provided in an embedded state in the foundation concrete of the rising portion, and the rising core beam has a steel horizontal plate portion at least on an upper portion thereof. An anchor may be held in the section (fifth invention).

In this case, it is only necessary to set a steel rising core beam at the rising portion, so that the rebar arrangement work at the rising portion can be simplified. Since a horizontal plate portion made of steel is provided at the upper portion and the anchor is attached to the horizontal plate portion, the anchor can be provided with high accuracy to the foundation concrete at the rising portion.
It should be noted that the fifth invention can also be effectively used for various foundations not premised on the first invention.

[0015]

Next, embodiments of the present invention will be described with reference to the drawings.

In the slab-type foundation 1 of the first embodiment shown in FIGS. 1 to 3, reference numeral 2 denotes a root cutting groove, reference numeral 3 denotes an embankment, reference numeral 4 denotes a rising portion of concrete, and reference numeral 5 denotes a concrete foundation slab.

The root cutting groove 2 is formed by excavating the ground 6 to a predetermined depth, and the rising portion 4 is raised from the inside of the root cutting groove 2 above the ground 6. .

An embankment 3 is formed on the ground adjacent to the root cutting groove 2, and a foundation slab 5 is formed on the embankment 3. The rising portion 4 and the foundation slab 5 Are provided so that their top surfaces are flush with each other. Reference numeral 7 denotes a disposal form,
When the foundation concrete 8 is driven, the formwork 7
It is installed only on the side opposite to the foundation slab 5 with the rising portion 4 interposed. The form may be removed after the concrete has been driven in, may be a heat-insulated form, may be a decorative form, and there is no particular limitation.

In this slab-type foundation 1, all or a part of the embankment 3 is made of the residual soil generated by excavation of the root cutting groove 2. That is, the remaining soil generated by excavation of the root cutting groove 2 is effectively used for forming the embankment 3 below the foundation slab 5. Therefore, not only is it difficult to dispose of the residual soil generated by excavation of the root cutting groove 2, but also this residual soil can be used to form the embankment 3, and the embankment 3 can be formed in a cost-effective manner. The embankment 3 and, if necessary, the ground portion thereunder are preferably subjected to ground improvement by compaction method or the like for the purpose of preventing settlement of the foundation slab 5 and increasing strength. The part up to this point is the second
The same applies to the third embodiment.

A base 9 is provided on the top surface of the rising portion 4 of the foundation 1. The base 9 is provided with the upper half protruding above the height of the top surface of the foundation concrete 8, and the lower half thereof is embedded in the foundation concrete 8 in the rising part 4. ing. That is, before the foundation 9 is driven into the base concrete 8,
And, together with the reinforcing bar 11 in the foundation slab 5 part, in the set state, the foundation concrete 8
And is provided in a semi-embedded state on the top surface of the rising portion 4. In addition, this base 9 is, for example,
It may be made of a steel product such as a channel steel or a square pipe material, in addition to an H-shaped steel as shown having upper and lower flanges and a web connecting these flanges. It may be made of a long object as shown, or may be made of a piece (not shown).

As described above, by setting the foundation 9 and setting the foundation concrete 8 into the structure, the mounting height position of the foundation 9 is not affected by the top surface position of the foundation concrete 8. In addition, even when the height of the top surface of the foundation concrete 8 is deviated, the base 9 can be provided on the top surface of the rising portion 4 with high accuracy. That is, even if the finish condition of the top surface of the foundation concrete 8 is made to a somewhat rough finish, the base 9 can be attached to the top surface of the rising portion 4 with high accuracy. In addition, since the base 9 is embedded in the base concrete 8 so that the base concrete 8 is surely present under the base 9, the base 9 can be firmly supported by the base concrete 8. Note that the base 9 may be provided so as to be flush with the top surface of the rising portion 4 in such a manner as to be exposed on the top surface portion of the rising portion 4.

The anchor 9 is mounted on the base 9.
2, 12 are connected. The anchor 12 is previously connected to the base 9 and provided before the foundation concrete 8 is driven. Therefore, the implantation of the foundation concrete 8 causes the anchor 12 to be integrated with the concrete 8, whereby The base 9 is firmly connected to the rising portion 4 by the anchor 12.
According to this structure, the foundation concrete is driven in after setting the anchor as in the past, and then, in the case of connecting the foundation and the upper structure to this anchor to the foundation, the anchor for the foundation concrete that is generated The problem of the mounting accuracy of the anchor, that is, if the anchor is not properly attached to the foundation concrete, the base or the upper structure cannot be properly connected to the anchor, and thus the accuracy of the attachment of the anchor to the foundation concrete is high. The problem of whether to make things can be eliminated.

In the slab-type foundation 1, an upper structure 18 of a building is connected to a base 9. Needless to say, another base (not shown) may be connected to the base 9 and the upper structure may be connected to the base. This is the same for the following second embodiment.

In the slab-type foundation 1 of the second embodiment shown in FIGS. 4 to 6, the base 9 is in contact with the foundation concrete 8 at the top surface of the rising portion 4 so as to also serve as the formwork of the foundation concrete 8. It is provided in. That is,
The base 9 is also set together with the reinforcing bar 10 in the rising portion 4 and the reinforcing bar 11 in the base slab 5 before the foundation concrete 8 is driven, and in the set state, the base concrete 8 is driven into the top portion 4 of the rising portion 4. It is provided on the surface.

Therefore, also in this embodiment, the base 9
Is set, and then the foundation concrete 8 is driven in. Therefore, the mounting height position of the base 9 is not influenced by the ceiling surface height position of the foundation concrete 8, and the top height position of the foundation concrete 8 may be misaligned. Even in such a case, the base 9 can be provided on the top surface of the rising portion 4 with high accuracy. That is, even if the finish condition of the top surface portion of the base concrete 8 is made to be a finish that does not take time and effort, the base 9 can be attached to the end surface portion of the rising portion 4 with high accuracy.

Furthermore, in the case of the present embodiment, the base 9 also serves as a formwork for driving the foundation concrete 8, so that the amount of the dedicated formwork 7 necessary for driving the foundation concrete 8 is reduced. be able to. Further, as shown in the drawing, the base 9 can be firmly supported by the base concrete 8 by arranging the base 9 so that the base concrete 8 exists below the base 9. Note that the base 9 may also be provided so as to be flush with the top surface of the rising portion 4 in such a manner as to be exposed on the top surface portion of the rising portion 4.

Also in this second embodiment, anchors 12 and 12 are connected to the base 9. This anchor 12 is also connected to the base 9 in advance before the foundation concrete 8 is driven in, so that the anchor 1
2 is integrated with this concrete 8, whereby
The base 9 is firmly connected to the rising portion 4 by the anchor 12. With this structure, as in the case of the first embodiment, the problem itself of how to increase the mounting accuracy of the anchor to the foundation concrete can be eliminated. Others are the same as the first embodiment.

In the slab-type foundation 1 according to the third embodiment shown in FIGS. 7 to 9, a rising core beam 13 made of steel is embedded in the foundation concrete 8 of the rising portion 4. The core beam 13 is formed by connecting upper and lower angle irons 14, 14 with one side being horizontal and the other side being vertical with an intermediate connecting member 15 such as a reinforcing bar or a shaped steel, and integrating them. The steel is not limited to the angle iron, but may be a flat steel. The connection may be a screw or a weld. And the horizontal side 1 of the upper angle iron
6, that is, the anchor 12 is attached to the horizontal plate portion 16, and the foundation concrete 8 is driven in the attached state. The anchor 12 is the rising core beam 1
3 can be stably attached to the upper horizontal plate portion 16, and the upper horizontal plate portion 16 of the rising core beam 13 restricts the anchor 12 from being displaced laterally due to the driving of the concrete 8. Also, in this embodiment, since the angle iron 14 is used,
Even if the anchor 12 is displaced or tilted in the vertical direction due to the driving of the concrete 8, it can be effectively controlled. Therefore, the anchor 12 can be provided on the foundation 1 with high accuracy, and the base 9 can be connected to the anchor 12 without any trouble.

[0029]

The present invention is as described above, so that a foundation can be constructed by effectively utilizing the remaining soil generated by excavation of a root cutting groove.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a foundation of a first embodiment.

FIG. 2 is an overall sectional view of the same.

FIG. 3 is an overall sectional perspective view of the same.

FIG. 4 is an enlarged sectional view showing a foundation of the second embodiment.

FIG. 5 is an overall sectional view of the same.

FIG. 6 is an overall sectional perspective view of the same.

FIG. 7 is an enlarged sectional view showing a foundation of the third embodiment.

FIG. 8 is an overall sectional view of the same.

FIG. 9 is an overall sectional perspective view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Slab type foundation 2 ... Root cutting groove 3 ... Embankment (remaining earth) 4 ... Rise part 5 ... Foundation slab 6 ... Ground 8 ... Foundation concrete 9 ... Foundation 12 ... Anchor 13 ... Core beam 16 ... Horizontal plate part

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akizu Tanaka 3-5-5 Umeda, Kita-ku, Osaka-shi, Osaka Daiwa House Industry Co., Ltd. F-term (reference) 2D046 AA13 BA00

Claims (5)

[Claims] 1. A rising part of concrete rising from the inside of a root groove formed on the ground, and a concrete foundation slab formed on an embankment piled on the ground outside the root groove. Part and the foundation slab are concrete slabs, and the slab-type foundation structure is provided with the top surface flush with the concrete, and the embankment includes residual soil generated by excavation of a root cutting groove Slab-type foundation structure characterized by the following. 2. A base is provided on a top surface of the rising portion, the base protruding at the same level as or higher than the height of the top surface of the base concrete, and is provided in a base concrete placed after the base is installed. Embedded in the
2. The slab-type foundation structure according to claim 1, wherein the slab-type foundation is provided so as to be exposed on a top surface of the rising portion. 3. A base is provided on a top surface of the rising portion, the base protruding at the same or higher than the height position of the top surface of the foundation concrete, and also serving as a formwork of the foundation concrete. 2. The structure of the slab-type foundation according to claim 1, wherein the slab-type foundation is brought into contact with the foundation concrete that has been driven in after installation and is exposed to the top surface of the rising portion. 4. The slab-type foundation structure according to claim 2, wherein an anchor is connected to the base. 5. A rising core beam made of steel is embedded in the foundation concrete at the rising portion, and the rising core beam has a steel horizontal plate at least at an upper portion thereof. The slab-type foundation structure according to claim 1, wherein the plate portion holds an anchor.