JP2637680B2 - Underground beam foundation construction method for house building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of a foundation for a building, and more particularly to a method of constructing an underground beam foundation for a house building having excellent strength and earthquake resistance.

[0002]

2. Description of the Related Art Conventionally, as a basic construction of a house building, after a root is cut at a predetermined position, a slit is made, and concrete is poured on the root at a predetermined height and width. The method of using as a foundation beam material is generally performed.

However, according to the foundation construction method, when an excessive load is applied to the foundation such as an earthquake or when a large-scale house is constructed, the load cannot be completely absorbed, and the concrete of the foundation is broken, As a result, there was a drawback that the house collapsed.

In order to eliminate such disadvantages,
Conventionally, there is an invention described in Japanese Patent Publication No. 2-36742 which uses an underground beam which is not general as a foundation of a house building.

[0005] In this invention, an H-section steel, which is an underground beam, is embedded in a foundation to improve the strength of the foundation and prevent the foundation from being damaged by an earthquake or the load of a building.

However, in the invention disclosed in Japanese Patent Publication No. 2-36742, although the steel pillar is buried by the foundation concrete, it is simply placed on the H-shaped steel beam in the foundation concrete. In addition, it is not necessarily sufficient in terms of strength because the concrete in the foundation is unstripped. Therefore, when excessive stress is applied to the foundation concrete of such a buried part due to a large earthquake or the weight of a large house, the H-shaped steel beam material and the column base are disengaged from each other, and the house is still housed. There is a risk of leading to collapse.

When the column base is mounted on an H-shaped steel beam, the iron column is buried in the ground to secure the height of the H-shaped steel beam and the stability of the iron column. Must be dug down the entire root to a reasonable height.

[0008] Further, depending on the scale of the house built on the foundation, the weight on the column base is large, and the foundation according to the invention lacks rigidity and cannot support the weight of the building. For this reason, even if a house is constructed to make effective use of land, such a basic construction method cannot be used in the suburbs of a large city where houses are becoming larger and larger.

[0009]

Accordingly, an object of the present invention is to solve the problem.
Is for removing the problems, to form a skeleton of the underground beams by fixing the H-shaped steel beam members to the lower part side of the steel pole, the backbone of the underground beams entirely on rebar siege to the circumferential Te
Configured as an underground beams together with concrete is to enclose
And, further in the portion for mounting the column base of the underground beams, split
Casting, discarded concrete, concrete for foundation
By providing a basic foundation, excellent strength,
In addition, the root cutting other than the column pedestal shall be shallow during construction .
An object of the present invention is to provide an underground beam foundation construction method for a house building that can be used .

[0010]

In order to achieve the above object,
Therefore, the underground beam foundation construction method for a house building according to the present invention is a method for burying an underground beam foundation of a house building on the surface of the ground, after digging a portion for mounting the column base of the beam deeper than other portions, performs Wariguri like throughout this Excavation bottom, and Da設concrete discarded thereon, the column base is placed that part of the discarded concrete top further Da設basic concrete, Wariguri discarded concrete, the foundation concrete with constituting the first basic integrally formed, wherein
Split the roots at the other roots.
And put concrete in the upper part
H is formed on the lower side surface of the iron pole which constitutes the foundation and which constitutes the pillar base.
The steel beam members are fixed, and the steel columns are interconnected by the H-shaped steel beam members to form a skeleton of an underground beam.
The first corresponding respectively to the skeleton of the underground beam including the legs
Place on the foundation and the second foundation, and
Co and more surround the entire fine skeleton to respective reinforcing rebar
Preferably , concrete is cast around the reinforcing steel bar to form an underground beam foundation integral with the first foundation and the second foundation.

A first foundation on which the column base of the underground beam is placed is a method in which a pile is staken at the bottom of a root and then divided and the like. It is preferable to use a pile driving foundation integrally formed by casting concrete for the foundation .

[0012]

According to the underground beam construction method for a house building according to the present invention, the column base of the underground beam is fixedly mounted on a strong foundation, and the underground beam has an underground beam frame. Since it is a high-strength structure integrally composed of reinforcing steel bars and concrete, a heavy load is applied when an excessive load is applied due to an earthquake or when a house built on the foundation is large-scale. Underground beam foundation that does not break even if it is damaged can be constructed.

In addition, since the H-shaped steel beam is fixed to the lower side surface of the iron column, even if the iron column is buried in the ground to an appropriate height for the stability of the iron column, the beam is buried under the ground. Can be made shallower.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows an underground beam of a house building according to the present invention.
It is sectional drawing of the column-base part of the underground beam constructed by the foundation construction method, and FIG. 2 is a perspective view which shows the skeleton of the column-base part of the underground beam which concerns on this invention. 1 and 2 , reference numeral 12 indicates an underground beam column base. When constructing the underground beam column base 12, first, a root is cut on the ground surface 14 for embedding the foundation 16 and the underground beam 18, and a groove 20 is provided. In this groove 20, the column base 12 of the underground beam 18
Dug deeper into the part 20 'where the
Rows Wariguri across the bottom of the deep depth portion 20 '
There, the Wariguri stone layer 24. And this split stone
After compaction the layer 24, the discarded concrete and pouring Discard <br/> form the concrete layer 26, underlying concrete layer 28 by pouring the foundation concrete further thereon
Formed to the Wariguri stone layer 24, discarded concrete layer 26, a first basic consisting underlying concrete layer 28 1
6a . The other part of the groove 20 is
While performing each split, it becomes the split stone layer 24,
Pour concrete into the upper part and throw away concrete
The second layer 16b is formed to form the second base 16b .

When the building to be constructed is a wooden building, the first foundation 16a on which the underground beam column base 12 is placed is a solid foundation, Although it is possible to directly underlying such fabric foundation, in order to enhance the rigidity, this is suitable if piling foundation. In this case, for example, after the pile 22 is piled at the root bottom of the portion where the first foundation 16a is to be buried, the pile 22 is piled up to the depth specified by the Building Standards Law, and the pile 22 is divided, and the concrete and foundation use concrete and Da設a can be formed <br/> a piling foundation.

[0017] It should be noted that, during the construction of the piling foundation, pile 2
By constructing so that one end on the ground side of the second penetrates the crushed stone layer 24 and the abandoned concrete layer 26 and is buried in the concrete layer 28 for the foundation, the pile driving foundation can be made stronger. I can . Further , by shaving the concrete at the end of the pile 22 on the ground side, exposing the embedded reinforcing steel and fixing it to the concrete layer 28 for the foundation , the pile driving foundation can be further strengthened.

After the above operation is completed, the H-shaped steel beam 32 is fixed to the lower side surface 30a of the iron column 30. The lower side surface 30a of the iron pole 30 and the H-shaped steel beam member 32 may be fixed using an engaging member such as a high-strength bolt, or may be welded by welding. In the case where both are fixed by using an engaging member such as a bolt, if a bolt hole or the like is provided in a joint portion in advance at a factory or the like, work efficiency on the site can be improved. .

By the above operation, the skeleton of the underground beam 18 formed by the iron columns 30 and the H-shaped steel beams 32 is suspended by a crane or the like , and the skeleton of the underground beam 18 including the column base 12 is moved forward.
The upper part of the first foundation 16a and the second foundation 16b
In particular, the iron pole 30 is mounted on the first
As will be placed vertically on top of a, placed in the groove 20.

The method of arranging the skeleton of the underground beam in the groove 20 is not limited to the above-described method. The iron columns 30 and the H-shaped steel beams 32 are previously arranged in the groove 20, and these are placed in the groove 20.
It may be fixed inside by bolting or welding.

[0021] In addition, after the operation, the reinforcing rebar 34
And surrounds the entire skeleton including the column base 12 of the underground beam 18. Some of the reinforcing rebar 34, if the width stop muscle 34a which passes through a hole provided in the abdominal portion of the H-shaped steel beam members 32, when the concrete was pouring to form a ground beam 18 after, The engagement between the H-shaped steel beam member 32 and the reinforcing bar 34 surrounding the H-shaped steel beam member 32 becomes stronger. Then, place the formwork for concrete molding on both sides of the reinforcing rebar 34, the concrete was pouring, after drying of the concrete, it is possible to form the ground beam 18 removed the formwork.

As described above, since the steel pole 30, the H-shaped steel beam member 32 and the reinforcing steel bar 34 are integrated via the concrete, the strength of the underground beam 18 can be improved and the pile driving foundation can be formed. 16 and the underground beam 18 are also fixed to each other by concrete and integrally formed,
The underground beam foundation according to the present invention does not break even when an unnecessarily large load is applied to the foundation due to the weight load of the house or an earthquake. Therefore, according to the construction method of the present invention, it is possible to cope with a building other than a wooden building (a building having two stories or more), and it is possible to effectively use a house near a large city where the scale is increasing.

Since the interior of the iron pole 30 remains hollow and lacks rigidity when the iron pillar 30 is left as it is, if concrete is also cast in the iron pole 30, the rigidity such as improvement in torsional strength can be increased.

FIG. 3 is a reference diagram showing the state of implementation of the present invention.

As shown in FIG. 3, according to the construction method of the present invention, a maximum height of 1.5 m, which is permitted by the Building Standards Law, can be secured between the underfloor beam 36 and the ground surface. Therefore, such a space can be effectively used as a space such as a parking lot or a storeroom.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various design examples are possible without departing from the spirit of the present invention.

[0027]

As is apparent from the above-described embodiment, according to the underground beam foundation construction method for a house building according to the present invention, an H-shaped steel beam material is fixed to the lower side surface of an iron pole and an underground beam is used. to form a skeleton surrounds the backbone of the underground beams at entirely rebar
As the underground beams together and pouring the concrete around it
Configuration, and further the portion for mounting the column base of the underground beams
Is split, discarded concrete, concrete for foundation
A first foundation integrally formed with
The part on which the other skeleton is placed is divided and discarded.
By providing the second foundation on which the sheet is cast , the strength is excellent, and at the time of construction, the root cutting other than the column base can be made shallow.

Further, in the underground beam foundation construction method of the present invention,
The first foundation on which the column base of the underground beam is placed is
After stakeout at the bottom, slicing, etc.
Put concrete and foundation concrete in
By the body formed by the piling foundation, Ru can provide ground beam foundation construction methods more strength improved house building.

[Brief description of the drawings]

FIG. 1 is a sectional view of a column base of an underground beam constructed according to the present invention.

FIG. 2 is a perspective view showing a skeleton of a column base portion of the underground beam according to the present invention.

FIG. 3 is a reference diagram showing a construction execution state of the present invention.

[Explanation of symbols]

Reference Signs List 12 underground beam column base 14 ground surface 16 foundation 16a first foundation 16b second foundation 18 underground beam 20 groove 20 ' groove (deep part) 22 pile 24 split stone layer 26 discarded concrete layer 28 concrete layer for foundation Reference Signs List 30 iron column 30a lower side surface of iron column 32 H- shaped steel beam material 34 reinforcing steel bar 34a width stop bar 36 under floor beam

Claims (2)

(57) [Claims] 1. An excavation for burying an underground beam foundation of a house building on the surface of the ground,
After digging deeper placed portions other parts of the pedestal portion of the ground beam, performs Wariguri like throughout this Excavation bottom, and Da設concrete discarded thereon, the pedestal portion mounting The foundation concrete is further poured into the upper part of the discarded concrete of the part to be placed, and the first foundation is formed by integrally forming the split concrete, the discarded concrete, and the concrete for the foundation .
And the other bottom of the root cutting
Perform splitting, etc. and pour concrete on top of it.
To form a second foundation , an H-shaped steel beam is fixedly attached to the lower side surface of the iron column constituting the column base, and the iron columns are interconnected by the H-shaped steel beam. The ground that forms the skeleton of the underground beam and includes the column base
Placing a medium-beam skeleton corresponding said first foundation and the second <br/> on foundation, and more surrounding the underground beams entire column base and backbone of each reinforcing rebar together, An underground beam foundation construction method for a house building, wherein concrete is cast around the reinforcing steel bar to form an underground beam foundation integral with the first foundation and the second foundation. 2. A first foundation on which a column base of an underground beam is to be placed is piled into a root cut, then split, etc., and discarded concrete and foundation concrete are poured on the top. The underground beam foundation construction method for a house building according to claim 1, comprising a pile driving foundation formed and integrally formed .