JP2002275913A - Foundation structure of building and building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mutually connect a plurality of pilasters by simple constitution, to reduce bending moment resulting from the load of a building working to a slab or a footing beam with pilasters and to decrease the concrete thickness and areas of reinforcements of the slab or the footing beam. SOLUTION: In the foundation structure of the building with a plurality of the pilasters 21 connected by the slab 23, anchor bolts 21A projected from the top faces of a plurality of the pilasters 21 are connected mutually by head connections 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a foundation structure of a building unit and a building.

[0002]

2. Description of the Related Art Conventionally, as a concrete base structure of a building, there is a structure having a plurality of pillars connected by slabs or underground beams as described in Japanese Patent Application Laid-Open No. Hei 6-57759. In the prior art, in order to prevent a bending moment caused by a load of a building installed on a foundation from being transmitted to a slab or an underground beam via a column type and deforming the slab or the underground beam, opposing columns are used. Insert metal fittings are cast on the side surfaces of the molds, and the column molds are connected to each other by head connecting bars screwed into the insert metal fittings to pull the column molds together. The presence of the head connecting bar that connects and pulls the opposite column types reduces the bending moment applied to the slab or the underground beam.

[0003]

The prior art has the following problems. It is necessary to cast insert metal fittings on the side of the column,
Insert metal fittings are particularly required, and it is also necessary to secure a fixed fixing strength to the tension to be borne by the head connecting muscles, which is complicated in construction and poor in productivity.

[0004] It is necessary to open a mounting hole for an insert fitting in a formwork for a column mold, and it is necessary to prevent concrete leakage.

[0005] The time required for screwing the head joint into the insert fitting is particularly required, and the workability is poor.

SUMMARY OF THE INVENTION An object of the present invention is to connect a plurality of column types with a simple configuration to reduce a bending moment caused by a load of a building acting on a slab or an underground beam having a column type.
An object of the present invention is to reduce the concrete thickness and the amount of rebar of a slab or underground beam.

[0007]

According to a first aspect of the present invention, there is provided a foundation structure of a building having a plurality of pillars connected by slabs or underground beams. Anchor bolts are connected by a head tie.

According to a second aspect of the present invention, in the first aspect of the present invention, the head tie further includes a length adjuster.

According to a third aspect of the present invention, there is provided a building installed on a foundation constructed by the basic structure of the first or second aspect.

[0010]

According to the first and second aspects of the present invention, the following effects are obtained. A head joint that connects the column types to each other and pulls the column types together is provided on the anchor bolt that is essential for the column type. Is inherently provided with a fixing strength against a horizontal force, can bear a tension acting on a head tie, and can simplify the configuration to improve productivity.

Since it is not necessary to provide a mounting hole or the like for the insert fitting in the formwork for the column type, a special structure for preventing concrete leakage is not required, and the workability can be improved.

When fixing a building by fastening nuts to columnar anchor bolts, the head ties can be fastened together, and the workability can be improved.

According to the third aspect of the invention, the following operation is provided. By providing a length adjustment tool on the head tie, the tension required for the head tie to pull the column types together is large enough, and the bending moment transmitted from the column type to the slab or underground beam due to the load on the building is increased. As a result, the concrete thickness and rebar of the slab or underground beam can be reduced more reliably.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view showing a foundation, FIG. 2 shows a main part of the foundation, (A) is a perspective view, (B) is a reinforcing member,
FIG. 3 shows a mounting structure of a head tie, (A) is a perspective view,
(B) is a side view, and FIG. 4 is a perspective view showing a building unit.

The foundation 10 shown in FIG. 1 supports a building constructed by combining a plurality of the building units 11 (which may be wooden units) shown in FIG. 4 and transmits the load to the ground.

The building unit 11 includes a floor beam 12 and a ceiling beam 1.
3. A frame structure in which the pillars 14 are joined in a box shape.

As shown in FIGS. 1 and 2, the foundation 10 is an L-shaped, T-shaped or cross-shaped precast concrete bundle (PC) installed immediately below each pillar 14 of each building unit 11 constituting the building. ), A side plate 22 arranged along the outer periphery of the building, and a slab 23 in which concrete is cast in-situ around a bundle including the bottom of each column 21 to connect the columns 21 to each other. And is configured. Column type 2
1. After the side plate 22 is manufactured in a factory in advance, it is carried into the site and used.

At this time, as shown in FIGS. 2 and 3, the column mold 21 is provided with an anchor bolt 21A for fixing the floor beam 12 of the building unit 11 on a smooth upper surface.

Further, as shown in FIG. 2, the column mold 21 is provided with anchoring streaks 25 connected to the base reinforcing bars 24 of the slab 23. In addition, in the whole or a part of the foundation 10, the column type 2
When placing 1 on the slab 23, the fixing streak 25 is unnecessary.

However, in the foundation 10, as shown in FIGS. 1 to 3, pillars adjacent to each other in a direction corresponding to the longitudinal (girder) direction (and / or short (wife) direction) of the building unit 11 are used. The anchor bolts 21A of the mold 21 are connected to each other by a head tie 30, and the bending moment caused by the load of the building unit 11 is transmitted to the slab 23 via the column mold 21, and the slab 2
3 is prevented from being deformed.

As shown in FIG. 3, when the floor beam 12 of the building unit 11 is installed on the upper surface of the column 21 as shown in FIG. 3, the head tie 30 is fixed using the extra length of the anchor bolt 21A through which the floor beam 12 is inserted. Is done. That is, the flat washer 41 and the head tie 3 are attached to the extra length of the anchor bolt 21A through which the floor beam 12 is inserted.
0 through the annular mounting portion 31A and the flat washer 42, and
The nut 43 is fastened to 1A.

The head joint 30 includes two rods 31, 31 having an attachment portion 31A at one end, and both rods 31, 31.
And a length adjuster 32 composed of a turnbuckle screwed to the threaded portion 31B on the other end side. Head Connection 3
In the case of No. 0, the length between the mounting portions 31A on both sides is adjusted by the length adjusting tool 32, and the anchor bolts 21A of the adjacent columnar molds 21 are pulled to be able to be tightened.

According to this embodiment, the following operations are provided. The head joint 30 that connects the column dies 21 and pulls the column dies 21 together is provided on the anchor bolt 21A that is essential for the column dies 21. In addition, the anchor bolt 21A is inherently provided with a fixing strength against a horizontal force, can bear the tension acting on the head joint 30, and can simplify the configuration to improve the productivity.

Since the formwork for the column mold 21 does not need to be provided with mounting holes for insert fittings, a special structure for preventing concrete leakage is not required, and workability can be improved.

When fixing the floor beam 12 of the building unit 11 by fastening the nut 43 to the anchor bolt 21A of the column 21, the head joint 30 can be fastened together and the workability can be improved.

By providing the head joint 30 with the length adjusting tool 32, the tension required for the head joint 30 to pull the column molds 21 to each other is required and sufficient, and the column mold 2 is caused by the load of the building.
The bending moment transmitted from 1 to the slab 23 can be reduced more reliably, and the concrete thickness and the amount of rebar of the slab 23 can be reduced more reliably. There is no need to arrange the base reinforcement 24 of the slab 23 in two steps, and the arrangement can be made in one step.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design can be changed without departing from the scope of the present invention. The present invention is included in the present invention. For example, the foundation to which the present invention is applied may be one in which a plurality of column types are connected by underground beams. Further, the foundation to which the present invention is applied is not limited to the one in which the column type is constituted by the PC bundle, and the column type may be constituted by cast-in-place concrete. The building to which the present invention is applied is not limited to a unit building.

[0028]

As described above, according to the present invention, a plurality of column types are connected to each other by a simple structure, and the bending moment caused by the load of the building acting on the slab or the underground beam having the column type is reduced. In addition, the concrete thickness and the amount of reinforcing steel of the slab or the underground beam can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a foundation.

FIG. 2 shows a main part of a foundation, (A) is a perspective view,
(B) is a bar arrangement part.

FIGS. 3A and 3B show a mounting structure for connecting a head, wherein FIG. 3A is a perspective view and FIG. 3B is a side view.

FIG. 4 is a perspective view showing a building unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Foundation 11 Building unit 21 Column type 21A Anchor bolt 23 Slab 30 Head connecting 32 Length adjustment tool

Continued on the front page (72) Inventor Norikatsu Masakazu 32, Tsudai, Tsukuba-shi, Ibaraki Sekisui Corporation Harmonate Construction Technology Center F-term (reference) 2D046 BA01 2E125 AA70 AE01 AG16 BA02 BB08 BB22 BD01 BE05 BE08 BF04 CA05

Claims (3)

[Claims] In a foundation structure of a building having a plurality of pillars connected by slabs or underground beams, anchor bolts projecting from upper surfaces of the plurality of pillars are connected by head ties. Basic structure of a building characterized by the following. 2. The building substructure according to claim 1, wherein said head tie comprises a length adjuster. 3. A building installed on a foundation constructed by the substructure of claim 1 or 2.