JP2981009B2 - Foundation structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation structure using a precast concrete block structure which is preliminarily formed in a factory or the like and installed on a construction site to form a foundation for a house or the like.

[0002]

2. Description of the Related Art As is well known, the foundation of a house is generally formed by casting concrete on site. Formation of groundwork by laying and rolling compaction, building formwork, placing concrete, dismantling formwork,
This is done by sequentially performing the work of backfilling and leveling the top with mortar. Further, in the case of a foundation having a footing portion, concrete is poured into the footing portion following the laying of crushed stone, and when reinforcing steel is provided in the foundation, reinforcing bars are provided prior to assembling the formwork. Work is performed. After the concrete is cast, it is necessary to perform an operation for positioning and mounting an anchor bolt for fastening and fixing the base as the upper structure to the foundation.

[0003] Therefore, in the above-mentioned basic construction procedure, the work is diversified and requires a large number of man-hours, so that it is difficult to reduce the construction period and the construction cost.
Requires skilled workers such as reinforced construction and form carpenters. Therefore, in recent years, in order to save labor on site such as prefabricated houses, as a precast concrete foundation building block structure in which a house foundation is formed in advance in a factory or the like,
In some cases, a method of constructing a foundation for a house or the like is performed.

The basic building block structure includes, for example, a basic footing portion mounted on a base and a rising portion provided on the basic footing portion and mounting an upper structure such as a house in advance. It is formed integrally in a factory or the like. The block structure has a shape obtained by dividing a conventional cast-in-place foundation vertically to its longitudinal direction. Moreover, the said base | substrate is provided with the groundwork similarly to the case where a foundation is constructed with cast-in-place concrete, and the concrete is thrown away on the groundwork.

[0005] Further, when the foundation is constructed, when the wall of the house is to be provided at the very end of the site, since the footing portion of the foundation extends left and right, only the protruding portion is restricted. The wall had to be set back from the border of the site. Therefore, in such a case, an eccentric foundation is used in which the sectional structure of the foundation is formed in an L-shape and the footing portion extends only inward of the house.

[0006]

By the way, the precast concrete foundation block structure is heavy in weight, and the foundation is bulky because the shape of the foundation is inverted T-shaped or L-shaped in cross section. It was expensive and time consuming to unload. Therefore, it is necessary to further divide the foundation block structure or to make a part of the foundation, for example, the footing part or the upper part of the rising part made of cast-in-place concrete, to reduce the weight during transportation and improve the ease of handling. it can.

However, when the number of divisions of the foundation is increased, when constructing the foundation, it is necessary to join the block structures in many places, and the work amount of the foundation construction increases. is there. Also, if part of the foundation is cast-in-place concrete, the construction of the house must be suspended until the cast-in-place is cured and hardened,
There is a problem in that the advantage of the precast concrete foundation that the construction work can be performed after a short time after the foundation construction work is lost.

Further, in the conventional foundation, when a house is set up along the boundary of a site, an L-shaped foundation and a T
There is a problem in that a character-shaped foundation is required, and two types of foundations must be manufactured.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to divide a block structure for a foundation and make a part of the foundation into cast-in-place concrete to form a foundation block structure. Even if the weight of objects is reduced, the amount of work for foundation construction does not increase,
It is an object of the present invention to provide a foundation structure that allows the construction of a house to proceed without delay after the foundation is constructed.

[0010]

In order to solve the above-mentioned problems, the present invention provides a basic footing portion mounted on a base,
The foundation footing is a rectangular plate-shaped base structure which is installed on the upper portion of the foundation footing portion and mainly includes a foundation rising portion which is a substantially rectangular concrete block structure viewed from the side. given along the bottom plate portion, the right and left side wall portion erected on both side edges along the length of the bottom plate portion, the length direction of the bottom plate portion to the bottom plate upper surface of the bottom plate portion
At intervals, and perpendicular to the length direction of the bottom plate
2 so that they face each other with a predetermined space between them.
A plurality of protrusions provided in a row, the base rising portion is provided with a fitting portion projecting from a lower surface thereof and fitting between opposed protrusions of the basic footing portion, The fitting portion of the foundation ridge is fitted between the projections of the foundation footing portion , and from the lower portion of the foundation ridge to the side.
Extending the reinforcing bar along the length direction of the bottom plate portion
The cast-in-place concrete is placed between the side wall portions on the bottom plate portion in a state of being arranged between the portions .

Also, a basic footing portion mounted on a base.
And installed on the upper part of this foundation footing part, and viewed from the side
Is a substantially rectangular concrete block structure
The basic structure mainly composed of the rising part
The base footing portion is a rectangular plate-shaped bottom plate portion and the bottom plate portion.
Sides erected on the left and right side edges along the length direction of the bottom plate portion
A wall portion and an upper surface of the bottom plate portion along a length direction of the bottom plate portion.
Are arranged in two rows so as to face each other at a predetermined interval.
And a plurality of projections,
The part projects from the lower surface and faces the basic footing part.
A fitting portion that fits between the projecting portions is provided,
Fitting portion of the base rising portion between the projecting portions of the footing portion
Is fitted, between the side wall portions on the bottom plate portion.
In place, cast-in-place concrete is cast, and the interval between the opposing projections and the interval between the opposing side wall and at least one of the opposing projections are formed at the same interval. The fitting portion of the foundation standing portion is fitted between the projecting portion and the side wall portion facing the projecting portion.

[0012]

According to the above construction, when the foundation is transported, it can be transported in a state in which the substantially rectangular foundation standing portion and the substantially rectangular foundation footing portion are piled up, so that it is not bulky and easy to handle. It is. And since the base footing part is made of cast-in-place concrete, it can be transported in a lightweight state.

Next, when constructing the foundation, first, the foundation footing portion is placed on the base with the horizontal level adjusted. Then, the fitting portion is fitted between the opposed protruding portions of the basic footing portion, and the foundation rising portion is set on the basic footing portion. Then, concrete is cast between the side walls on the bottom plate of the base footing. At this stage, even if the concrete has not hardened, the foundation erect portion is fitted to the foundation footing portion and does not fall down, so that a house as an upper structure can be constructed as it is.
Also, between the protrusions of the foundation footing part,
The fitting part is fitted, and from the lower part of the foundation upright to the side
Extending the reinforcing bar along the length direction of the bottom plate portion
With the side wall portion on the bottom plate portion being disposed between the portions.
The cast-in-place concrete is cast between
A firm fixation can be realized.

[0014] Further, by inserting the fitting portion of the foundation rising portion between the side wall portion and the protruding portion of the foundation footing portion, it can be used as a foundation having an L-shaped cross section.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 7 are views showing an embodiment of the present invention. The basic structure of this embodiment includes a basic footing portion 1 placed on a base and an upper portion mounted on the basic footing portion 1. And a foundation part 2 which is a substantially rectangular concrete block structure in a side view.

The footing portion 1 has a shape obtained by dividing a footing portion of a conventional cast-in-place foundation in a side view so as to be perpendicular to a longitudinal direction thereof. As shown in FIG. 1 and the like, the basic footing portion 1 includes a bottom plate portion 3 having a rectangular plate shape,
Side walls 4, 4 erected along the longitudinal direction of the bottom plate 3 on both left and right side edges of the bottom plate 3, and predetermined intervals along the longitudinal direction of the bottom plate 3 on the bottom plate 3. Everywhere, and before
Leave a predetermined space in the direction perpendicular to the length direction of the bottom plate
And a plurality of protruding portions 5 provided in two rows so as to face each other in a state in which the protruding portions 5 are opposed to each other.

The bottom plate 3, side walls 4, 4 and protrusion 5
... are made of integrally cast precast concrete. The bottom plate 3 is formed to have substantially the same width as the footing portion of the conventional cast-in-place foundation. The width of the bottom plate 3 is determined in consideration of the weight of the house placed on the foundation. The length of the bottom plate portion 3 is regulated by the size of a carrier such as a truck for transporting the foundation footing portion 1, and is a length obtained by dividing a cloth foundation of an ordinary house into several pieces. The side wall 4 is provided from one end to the other end of the bottom plate 3 along both side edges of the bottom plate 3.

The protrusions 5 have the same thickness and height as the side walls 4 and 4 and are formed in a rectangular parallelepiped shape. As shown in FIG. 3 and the like, the pair of projecting portions 5 opposed to each other is formed such that the interval between the side wall portions 4 and 4 and the interval between the projecting portions 5 and 5 are the same. I have. That is, the protruding portions 5 are provided so as to provide three equally spaced grooves between the side wall portions 4, 4. And a plurality of such a pair of protrusions 5, 5 are provided at intervals along the length direction of the bottom plate portion 3, and these intervals are determined by the weight of the house and the length of the protrusions 5,. Etc.

As shown in FIG. 1 and the like, the foundation upright 2 serves as a rising portion of a precast concrete foundation preformed in a factory or the like, instead of the conventional elevation of a cast-in-place concrete foundation. It is.
When the foundation ridges 2 are used as a continuous foundation such as a cloth foundation, a plurality of foundation ridges 2 are similarly arranged in a row on the foundation footing portions 1 arranged in a row on the foundation. It is to be installed.

As shown in FIGS. 1 and 5, etc., the foundation standing portion 2 is formed in a substantially rectangular parallelepiped shape. On the lower surface of the foundation erecting portion 2, fitting portions 6 projecting from the lower surface are provided. The fitting portions 6 are provided so as to correspond to the projecting portions 5 of the basic footing portion 1. The thickness of the fitting portions 6 is the distance between the pair of projecting portions 5 and the projecting portions 5 and the projecting portions 5.
Is formed to have the same length as the interval between the side wall portion 4 and the opposite side. The length of the fitting portion 6 is substantially the same as the length of the protruding portion 5. The fitting portion 6 can be fitted between the pair of protrusions 5 or between the protrusions 5 and the side wall 4.

As shown in FIGS. 5 and 6, two end portions 7, 7 are provided on the end face of the base rising portion 2 in the vertical direction. Further, a notch 8 that opens to the upper surface and the end face of the foundation upright 2 is provided above the end of the foundation upright 2.

In the interior of the foundation upright 2, there is provided a reinforcing bar 9, 9 extending along its length and a reinforcing bar 1 extending vertically.
0 ... are buried. Reinforcing bars 9 along the length direction
Among them, the reinforcing bar 9 buried in the upper part of the foundation upright 2 is exposed in the cutout 8, and its end is extended from the end face of the foundation upright 2. In addition, one reinforcing bar 11 is embedded in the fitting portion 6 along the length direction of the foundation rising portion 2 so as to connect the fitting portions 6.
This reinforcing bar 11 is also provided so as to extend from the end face of the foundation standing portion 2. And, the reinforcing bars 10 along the vertical direction
The upper end is hooked on a reinforcing bar 9 extending along the length direction, and the lower end is hooked on a reinforcing bar 11 connecting the fitting portions 6 with the lower end protruding from the lower surface of the foundation standing portion 2.

When the fitting portion 6 is fitted between the protruding portion 5 and the side wall portion 4, as shown in FIG. 1 or FIG. The lower end 1 of the reinforcing bar 10 is provided for the purpose of reinforcement so as not to be damaged.
0a is a direction orthogonal to the direction in which the basic footing portion 1 extends
It extends horizontally (to the side). And
The lower end 10 a of the reinforcing bar 10 extends along the length of the bottom plate 3.
Between the projecting portions 5 ...
Luo rebar 12 along the length of the underlying raised portion so as to connect the extending therefrom ends of reinforcing bars 10 are joined.

The extended end of the reinforcing bar 10 is formed to the length up to the side wall 4 of the basic footing 1.
The reinforcing bars 12 connecting the ends of the reinforcing bars 10 are buried between the protruding portions 5 and the side wall portions 4 of the basic footing portion 1.

The basic structure using the basic footing portion 1 and the base rising portion 2 having the above-described structure is such that the fitting portion 6 is provided on the basic footing portion 1 placed in a line on the base. And as shown in FIG. 7, it is installed between the protruding parts 5, 5,
Alternatively, as shown in FIGS. 3 and 4, it is installed so as to be fitted between the side wall portion 4 and the protruding portion 5, and between the side wall portions 4, 4 of the basic footing portion 1, FIG. As shown in the figures, cast-in-place concrete is poured to the height of the side wall.

Also, the joining portions of the basic footing portions 1 and 1 are joined at the end faces of the basic footing portions 1 and 1,
Concrete is cast and connected as described above. In addition, the joints between the foundation erect portions 2 and 2 are abutted with the end surfaces of the foundation erect portions 2 and 2 slightly spaced from each other, and the reinforcing bars 9 and 11 extending from the respective end surfaces are notched. In the space between the portions 8 or the fitting portions 6, the wires are overlapped and joined by winding a wire, and the grout material such as mortar is filled between the end surfaces in a state in which both side surfaces of the joined portions are covered with a mold. The recesses 6 and 6 and the cutout 8 on the end face are filled with a grout material.

When a foundation is constructed on a construction site using the foundation structure of the present embodiment, first, materials such as the foundation footing portion 1 and the foundation standing portion 2 are transported by a truck or the like. At this time, since the foundation footing portion 1 and the foundation rising portion 2 are formed in a substantially rectangular shape, they can be loaded on a truck bed in a stacked state. The basic footing section 1
Since it is substantially hollow for casting cast-in-place concrete, it is light and easy to handle.

At the construction site, first, a root cutting hole is provided in the same manner as the above-mentioned conventional foundation building block structure.
A local business is formed at the bottom, and the kneaded mortar or floor mortar is thrown away into the local business and used as a base. And
Along the root cut holes, the basic footing parts 1 are arranged in a row on the base so as to be connected. At this time, before the mortar is hardened, the horizontal level of the foundation footing portion is adjusted. However, compared to the conventional precast concrete foundation, the foundation footing portion 1 itself is easily moved, so that the foundation footing portion 1 is easily moved. , Can adjust the horizontal level.

Then, the position of the fitting portion 6 of the foundation rising portion 1 is set between the projections 5 and 5 projecting on the bottom plate 3 of the foundation footing portion 1 or between the projections 5 and the side wall portion 4. At the same time, the fitting portion 6 is connected between the protrusions 5 and 5 or between the protrusions 5.
And the side wall portion 4 is fitted, and the foundation rising portion 2 is installed.

At this time, if the fitting portion 6 is fitted between the protruding portions 5, 5, a general base having an inverted T-shaped cross section is formed as shown in FIG. Fitting part 6 between parts 4
Is fitted to form an eccentric foundation having an L-shaped cross section, as shown in FIG.

By fitting the fitting portion 6 to the fitting portion 6, the foundation rising portion 2 is pressed from the left and right by the projecting portions 5 and 5 and does not fall down even when the work of providing a wall or floor on the foundation is performed. . Next, concrete is poured between the side walls 4 of the foundation footing 1 to the height of the side walls 4.
At this time, a formwork is attached and closed on the end face of the base footing portion 1 at the end portion of the cloth base.

Next, the reinforcing bars extending from the end faces of the adjacent foundation standing portions 2 and 2 are overlapped with each other, and a wire is wound thereon and joined. Then, both side surfaces of the connection portion of the foundation standing portions 2 and 2 are covered with a mold, and a grout material is cast into the connection portion.

Backfill the foundation formed as described above,
Start building a house on the foundation. At this time, even if the concrete poured into the foundation footing part 1 is not hardened, the fitting part 6 of the foundation standing part 2 may be located between the projections 5 or between the projections 5 or between the projections 5 and the side wall 4. The fitting between them prevents the foundation from falling even when construction work is performed on the foundation.

As described above, according to the foundation structure of the present embodiment, the foundation is divided into the substantially rectangular foundation footing portion 1 and the foundation rising portion 2 so that when the truck is loaded on a truck, etc., The weight is reduced, the handling becomes easy, and the basic footing portion 1 and the foundation rising portion 2 are substantially rectangular, so that they can be stacked as they are, so that they are not bulky. In addition, the basic footing unit 1
Inside it is a space for cast-in-place concrete, which is lightweight and easy to handle. For these reasons, transportation costs can be reduced.

And, even if the foundation is divided, the projections 5, 5 of the foundation footing portion 1 or between the projections 5, 5 or
By simply fitting the fitting portion 6 of the foundation rising portion 2 between the and the side wall portion 4, the joining can be easily performed. Even if a part of the foundation is cast-in-place concrete, the foundation standing part 2 is pressed down from the left and right by the protruding part 5 or the side wall part 4 so that the foundation footing part 1 and the foundation standing part 2 are integrally joined. For the side walls 4, 4 of the basic footing 1
Construction work on the foundation can be performed without waiting for the concrete poured between them to harden.
Furthermore, since the side wall 4 of the basic footing 1 can be used as a form as described above, the work of setting the form when casting concrete can be omitted.

Further, when the fitting portion 6 of the foundation rising portion 2 is fitted between the projections 5 and 5 of the foundation footing portion 1, it can be used as a general foundation. When fitting portion 6 is fitted between 5 and side wall portion 4, it can be used as an eccentric foundation, so that the same component can be used for both foundations, and the production cost of the foundation is reduced. be able to.

Needless to say, the basic footing portion 1 and the foundation rising portion 2 may be connected to each other with their end faces shifted from each other, or the basic footing portion 1 and the foundation rising portion 2 may have different lengths. It is. Further, in the present embodiment, a plurality of fitting portions 6 of the foundation rising portion 2 are provided in correspondence with the protruding portions 5 of the foundation footing portion 1, but between the protruding portions on the lower surface of the foundation rising portion 2. A configuration in which one fitting portion having a fitting width is provided may be provided. Further, as shown in FIG. 8 and FIG.
Etc. may be used as a foundation that can withstand a larger weight than the foundation shown in FIG. When the width of the foundation footing portion is increased, it is necessary to provide a reinforcing bar 21 extending left and right from the reinforcing bar 11 at the lower end of the foundation standing portion 1 in order to reinforce the foundation footing portion 20 as in the case of the eccentric foundation. is there.

[0038]

As described in detail above, according to the foundation structure of the present invention, the weight per unit is reduced by dividing the foundation into a substantially rectangular foundation footing part and a foundation standing part. In addition, since there is a space for cast-in-place concrete inside the foundation footing part and it is lighter, it can be easily handled when it is loaded on a truck or the like. Further, since the base footing portion and the base rising portion are substantially rectangular, they can be stacked on a truck or the like as they are, so that they are not bulky. Therefore, transportation costs can be reduced.

Further, even if the foundation has a divided structure, it can be easily joined by fitting the fitting portion on the foundation standing portion between the projecting portions of the foundation footing portion. Furthermore, even if a part of the foundation is cast-in-place concrete, the side wall of the foundation footing part can be used as a formwork, and the work of building the formwork can be omitted. Are fitted between the protrusions of
Since it does not fall to the left and right, the construction work on the foundation can be performed without waiting for the concrete poured between the side walls of the foundation footing to harden.
Also, between the protrusions of the foundation footing part,
The fitting part is fitted, and from the lower part of the foundation upright to the side
Extending the reinforcing bar along the length direction of the bottom plate portion
With the side wall portion on the bottom plate portion being disposed between the portions.
The cast-in-place concrete is cast between the
The foundation footing section can be reinforced and
The bonding strength with the foundation rising can also be increased.

Further, when the fitting portion of the foundation standing portion is fitted between the projecting portions of the foundation footing portion, it can be used as a general foundation, and the space between the projecting portion and the side wall portion can be used. When the fitting portion is fitted to the base, it can be used as an eccentric base, so that the same component can be used for both bases, and the production cost of the base can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a foundation footing portion and a foundation rising portion before being installed as an eccentric foundation of the embodiment.

FIG. 2 is a perspective view showing the structure of the basic footing portion and a joint portion between the basic standing portions.

FIG. 3 is a cross-sectional view showing the foundation footing portion and the foundation standing portion.

FIG. 4 is a cross-sectional view showing the basic footing portion and a rising portion in an installed state.

FIG. 5 is a side view showing the foundation standing portion.

FIG. 6 is an end view of a standing part of the foundation installed as a general foundation.

FIG. 7 is a cross-sectional view of the above-described foundation standing portion and the foundation footing portion.

FIG. 8 is an end view showing a state in which a foundation standing portion is installed on a basic footing portion wider than the basic footing portion.

FIG. 9 is an end view showing a state in which a foundation standing portion is installed on the foundation footing portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Basic footing part 2 Foundation rising part 3 Bottom plate part 4 Side wall part 5 Projection part 6 Fitting part

Claims (2)

(57) [Claims] 1. A base footing portion mounted on a base,
The foundation footing is a rectangular plate-shaped base structure which is installed on the foundation footing part upper part and mainly includes a foundation rising part which is a substantially rectangular concrete block structure in a side view. A bottom plate portion, side walls erected along the length direction of the bottom plate portion on both left and right edges of the bottom plate portion, and at predetermined intervals along the length direction of the bottom plate portion on the upper surface of the bottom plate portion. , And perpendicular to the length direction of the bottom plate portion
A plurality of protrusions provided in two rows so as to face each other at a predetermined interval in a direction in which the base footing portion protrudes from the lower surface and faces the base footing portion. A fitting portion that fits between the projecting portions is provided, and the fitting portion of the base rising portion is fitted between the projecting portions of the basic footing portion , and from the lower portion of the foundation rising portion.
Reinforce the laterally extending rebar along the length of the bottom plate
A foundation structure wherein cast-in-place concrete is cast between side wall portions on the bottom plate portion in a state arranged between the projecting portions . 2. A base footing portion mounted on a base,
It is installed on the upper part of the footing section of
The base of the foundation, which is a concrete shaped block structure
And the base footing portion is a rectangular plate-shaped bottom plate portion, the bottom plate portion
On the left and right side edges of the bottom plate along the length direction
A side wall portion and an upper surface of the bottom plate portion along a longitudinal direction of the bottom plate portion.
Are arranged in two rows so as to face each other at a predetermined interval.
And a plurality of projections,
The part projects from the lower surface and faces the basic footing part.
A fitting portion that fits between the projecting portions is provided,
Fitting portion of the base rising portion between the projecting portions of the footing portion
Is fitted, between the side wall portions on the bottom plate portion.
In place, cast-in-place concrete is cast, and the interval between the opposing projections and the interval between the opposing side wall and at least one of the opposing projections are formed at the same interval. A base structure, wherein the fitting portion of the base rising portion is fitted between a protruding portion and a side wall portion facing the projecting portion.