JP2001131988A - Foundation structure of building, and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constructing means of favorable workability for a mat foundation for a building. SOLUTION: An outer circumferential part of a building is excavated 2, a solid filler member 5 is placed to have a gap corresponding to an underground beam forming position inside an excavated position, reinforcements 6 for an underground beam are composed in the excavated position and the gap, surface reinforcements to cover the filler member 5 are composed, a vertical frame 4 is erected at an outer circumferential part of a foundation to be constructed, and concrete 7 is placed to the whole building part inside a form for construction.

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 to be a house and a construction method thereof.

[0002]

2. Description of the Related Art As is well known, a cloth foundation and a solid foundation are widely used as a foundation structure frequently used in a building which is a conventional house. In the former, a groove is dug in the ground (root cutting).
Standing stones in the grooves without gaps, further laying gravel, giving away concrete if necessary, assembling the prescribed formwork and reinforcing bars, and setting up the cloth base at the wide lower part (footing part). .

The latter is employed when the ground is weak. In order to prevent the building from being tilted due to uneven settlement of the building, the whole is integrated into the area surrounded by the cloth foundation. In addition, a concrete foundation is used to connect the rising portions of the cloth foundation.

[0004] By the way, in addition to the above-described structure on the basis of the cloth foundation, the solid foundation is not provided with a footing portion and integrally connects the upper portions between the underground beams to form a planar foundation serving as a support surface of the building base. Solid foundations are also known. That is, Patent No. 286
Japanese Patent No. 0491 discloses that roots are cut in the outer peripheral part of the building and within the building construction area, steel-frame foundation beams are arranged at the root-cutting points, discarded forms are set up on both sides of the foundation beams, and There is disclosed a construction means in which the spaces are connected by slab reinforcing bars, and an underground beam and concrete serving as a plane foundation are cast. Japanese Patent Application Laid-Open No. 4-339915 discloses a solid foundation construction means in which a part to be an underground beam is cut off, a formwork is arranged only on the outer peripheral part of the building, and concrete is poured into the entire formwork. Is disclosed.

[0005]

The above-mentioned means for constructing a flat solid foundation has a problem of workability in that the entire underground beam forming portion in the inner part of the building is also cut off. is there. In addition, when giving a predetermined strength to an underground beam or a plane solid foundation, it is naturally necessary to incorporate a reinforcing bar, and there is a problem of workability in that a predetermined formwork work is required for the reinforcing bar assembly. .

Accordingly, the present invention proposes a new solid foundation structure excellent in workability and a construction means therefor.

[0007]

A solid foundation structure for a building according to the present invention is provided with a deep underground beam having a predetermined structure by cutting off a portion corresponding to the outer periphery of the building, and a portion corresponding to the inside of the building is provided on the ground. An underground beam having a predetermined structure is provided thereon, an appropriate filler is provided between the underground beams, and a planar foundation connected to the underground beam is formed on an upper surface of the filler.

[0008] In the construction method of a solid foundation for a building according to the present invention, a portion corresponding to the periphery of the building is subjected to root cutting, and a portion corresponding to the inside of the building is provided with a plurality of plate-like solid fillers. Spreading so that the beam forming place becomes a space, assembling underground beam reinforcing bars in the root cut-out area and the space between fillers, further connecting the upper part of the underground beam, and covering the filler on the planar foundation And a formwork for forming an underground girder at the root cutting portion is erected only in the outer peripheral portion, and concrete is poured into the entire building portion in the formwork.

[0009]

Next, an embodiment of the present invention will be described in accordance with the construction procedure. The solid foundation A to be constructed is a block-like appearance block in which the entire area in which the building is to be constructed has a flat upper surface located at a predetermined height from the ground 1, that is, the floor of the building to be constructed. Peripheral underground beam a described later
And an underground beam b, and a plane portion c connecting the upper portions of the underground beams a and b.

At first, a portion corresponding to the outer periphery of the building is subjected to excavation 2, and crushed stones 3 are laid on the bottom surface of the excavation 2 and the ground 1 within the area surrounded by the excavation 2 to level the ground. Then, formwork 4 is erected on the outer peripheral surface of the foundation in root cutting 2,
Further, a filler 5a is laid on the bottom surface in the root cutting 2 at a predetermined gap (width of the underground beam a around the building) from the formwork 4. Further, a plate-like filler 5b is laid in the area surrounded by the root cutting 2.

The filler 5 is a styrene foam plate or a urethane foam plate having a predetermined compressive strength. In particular, the filler 5b laid inward has a gap of about 10 cm between adjacent fillers 5b. (Width of the underground beam b) is opened, and the fillers 5a are formed in a square shape and are arranged at regular intervals so that the gaps are 90 cm or 100 cm and are linear. 1). The thickness of the filler 5b is determined in consideration of the ground height and strength of the foundation to be constructed (the strength of the underground beams a and b and the strength of the plane part c connecting the beams). It is determined by the thickness of c.

Next, the inside of the mold 4 (where the outer underground beam a is formed), the gap between adjacent fillers 5b (the location where the inner underground beam b is formed), and the space above the filler 5b (see FIG. The reinforcing bar 6 is incorporated into each of the flat portions c. In the structure of the reinforcing bar 6, the portion corresponding to the underground beams a and b is incorporated in a vertical plate shape, and the portion corresponding to the plane portion c is incorporated in a lattice slab reinforcing bar.

When the rebar assembly is completed, concrete 7 is poured into the entire inner side of the formwork 4 to form a deep underground beam a and a deep underground beam a formed up to or below the ground 1 constituting the outer peripheral portion. Inside, a solid foundation A composed of an inner underground beam b formed in a lattice shape on the ground 1 and a plane portion c connecting the upper portions of both underground beams a and b is formed. .

On the upper surface of the underground beam a of the solid foundation A, a ridge 8 for the base B is formed, and above the underground beam b, slab ridges 9 are formed at predetermined intervals. The ridge 8 and the protrusion 9
Mount the base B on top and build the building. Needless to say, anchor bolts for fixing the base B are planted at appropriate places of the ridges 8 and the protrusions 9 before the concrete is cast.

In the solid foundation described above, the roots need only be cut off around the building, the root cuts for the inner underground beams b can be omitted, and the filler 5 itself can be used for the inner underground beams b. Since it also serves as a formwork, root cutting work and formwork work for the inward underground beam can be omitted. Furthermore, by adopting a material having a heat insulating function as the filler 5, there is an advantage of blocking moisture and heat between the ground and the building. Further, by forming the inner underground beams in a lattice shape of a predetermined standard, there is an advantage of providing versatility that can sufficiently cope with a change in the arrangement of pillars in a building.

The present invention is not limited to the above embodiment, and the filler is not limited to a foamed member. Also, the inner underground beam is not formed in a lattice shape and is formed corresponding to a building structure to be constructed. The roots may be cut off as necessary.

[0017]

As described above, according to the present invention, the outer periphery of a building is cut off, solid filler is laid inside the cut off so as to have a gap corresponding to the underground beam forming place, In addition to assembling the reinforcement for the underground beam in the gap, incorporating the reinforcement for the planar foundation covering the filler, setting the formwork on the outer periphery of the construction foundation, and casting concrete over the entire building portion in the formwork. With the solid foundation constructed and constructed, the root cutting work and formwork work on the inner foundation can be omitted, the amount of soil remaining after root cutting can be reduced, the workability can be improved, and the use of wasteful concrete can be reduced, thus saving energy. It also contributes in terms of resources.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a state in the middle of basic construction according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view when the same is completed.

FIG. 3 is a partially cutaway plan view at the time of completion.

[Explanation of symbols]

 A Foundation a Peripheral underground beam b Inner underground beam c Plane part B Base 1 Ground 2 Ground cut 3 Crushed stone 4 Formwork 5 Filler 6 Reinforcement 7 Concrete

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[Procedure amendment]

[Submission date] February 9, 2000 (200.2.9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

In the solid foundation described above, the roots need only be cut off around the building, the root cuts for the inner underground beams b can be omitted, and the filler 5 itself can be used for the inner underground beams b. Since it also serves as a formwork, root cutting work and formwork work for the inward underground beam can be omitted. To further have a thermal insulation function to the filling material 5
By employing those that would have the advantage of performing blocking moisture and heat between the ground and the building. Further, by forming the inner underground beams in a lattice shape of a predetermined standard, there is an advantage of providing versatility that can sufficiently cope with a change in the arrangement of pillars in a building.

Claims (4)

[Claims] 1. A portion corresponding to the outer periphery of a building is provided with a deep underground beam having a predetermined structure by performing root cutting, and a portion corresponding to the inside of the building is provided with an underground beam having a predetermined structure on the ground. A basic structure of a building, wherein an appropriate filler is provided between the center beams, and a planar foundation connected to the underground beam is formed on the top surface of the filler. 2. The basic structure of a building according to claim 1, wherein the filler is a polystyrene foam plate or a urethane foam plate. 3. A portion corresponding to the outer periphery of the building is subjected to root cutting, and a portion corresponding to the inside of the building is covered with a plurality of plate-shaped solid fillers so that the underground beam forming portion becomes a space. Assemble underground beam reinforcing bars in the cut locations and spaces between filler
In addition to connecting the upper part of the underground beam, incorporating a rebar for planar foundation that covers the filler, setting up the formwork for forming the underground beam at the outer periphery only at the root cut-off point, the entire building part in the formwork A foundation construction method for buildings, characterized by placing concrete in the building. 4. The method according to claim 3, wherein the filler is a polystyrene foam plate or a urethane foam plate.