JPH09279601A - Bar arrangement foundation of exposed type fixed column base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a foundation of a low cost and a small the by disposing horizontal main reinforcements laid along the longitudinal direction of the foundation, a plurality of stirrups connecting the horizontal main reinforcements laterally, a web reinforcement disposed in the middle thereof and anchor bolts in the foundation including a fixed part of a column base. SOLUTION: Anchor bolts 11 are spaced and disposed in the direction of the width of a foundation. Next, an anchor plate 12 is fixed to the lower ends of the bolts 11, being supported by nuts 13 screwed on the bolts, and the lower ends of the bolts 11 are connected by the anchor plate 12. At the upper end parts of the bolts 11, a sill plate 15 is fitted on the bolts 11 and the bolts 11 are provided in a fixed part of a each column base in a state wherein they are fitted with the anchor plate 12 and the plate 15. Subsequently, two horizontal main reinforcements 19 being bundled are disposed inside bent parts 22 of stirrups 21 disposed at intervals in the longitudinal direction of the foundation and they are connected by the stirrups 21 laterally. Moreover, a web reinforcement 23 is fixed. According to this constitution, projection of the part of the column base is prevented and construction of a form can be facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar arrangement foundation for an exposed fixed column base used in a small-scale building such as a private house.

[0002]

2. Description of the Related Art FIG. 6 shows a basic reinforcing bar used in a conventional two- or three-story steel-framed private house. In the figure, (1) is an anchor bolt for fixing a column base. In the column base portion where the anchor bolt (1) is arranged, as shown in the figure, the square hoops (2) (2) ... And the hoops (2) (2) ) ... A cage-shaped rebar unit (4) consisting of four longitudinal main bars (3) connecting each corner is installed so as to surround the four anchor bolts (1) (1). In the foundation part between the legs, four lateral main bars (5) (5), which are arranged at intervals in the width direction and the vertical direction of the foundation, and are connected so as to surround the lateral main bars (5) (5). Multiple longitudinal longitudinal stirrup
Reinforcing bar units (7) consisting of (6), (6), and so on are arranged, and these units (4) and (7) form a basic bar arrangement.

[0003]

The above-mentioned conventional basic bar arrangement is generally used for large-scale buildings such as office buildings, and is used for small-scale private houses up to 3 stories at the most. Had an excessive muscle arrangement.

That is, first, the cage-shaped reinforcing bar unit (4) as described above is arranged in the column base portion, and
Since the cage-shaped rebar unit (7) as shown in the figure was placed between the column bases as well, the width of the foundation was increased overall, and the amount of rebar and concrete increased unnecessarily, resulting in high cost. There is a drawback.

Further, since the special cage-shaped reinforcing bar unit (4) as shown in the figure is arranged on the column base, the bar arrangement is complicated and the design and construction are difficult. Also, if the rebar unit (7) other than the column base is made narrower and the width of the foundation of this part is made smaller, the amount of rebar and concrete can be reduced to some extent. Concrete protrudes in the width direction of the foundation, making the shape of the foundation complicated and making formwork difficult,
There is a drawback that the interior is complicated to fit.

The present invention solves the above drawbacks of the prior art, and in the foundation for a small-scale personal house of about two or three floors, the amount of reinforcing bars and concrete does not unnecessarily increase, and The purpose of the present invention is to provide a bar arrangement for a foundation concrete having a sufficient strength and a low cost and a narrow width.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a pair of vertical main bars in the vertical direction along the longitudinal direction of the foundation and a space between the horizontal main bars which are arranged at intervals in the longitudinal direction of the foundation. It is composed of a plurality of star laps to be connected and an abdominal muscle arranged in an intermediate portion in the vertical direction of the star wraps as required, and an anchor bolt is arranged at the column base fixing portion.

Similarly, in the invention of claim 2 of this application, a pair of vertical main bars along the longitudinal direction of the foundation, and a plurality of stirrup arranged at intervals in the longitudinal direction of the foundation and connecting the lateral main bars. , If necessary, it is composed of abdominal muscles arranged in the vertical middle portion of the stirrup, and anchor bolts are arranged in the column base fixing portion, and in addition to the reinforcing bar, a plurality of corner bolts are provided in the corner portion. The cage-shaped reinforcing steel bar composed of a plurality of hoops connected to the vertical main bars by the vertical main bars is provided.

[0009]

1 to 3 show an arrangement structure of a reinforcing bar and anchor bolts in a straight part of a concrete foundation. The anchor bolts (11) (11) are composed of two pieces arranged at intervals in the width direction of the foundation, and the fixing plate (12) is screwed to each anchor bolt (11) (11) at the lower end portion thereof. It is supported and fixed from both upper and lower sides by the combined nuts (13) and (14), and both anchor bolts are fixed by this fixing plate (12).
(11) The lower ends of (11) are connected. Also anchor bolts
(11) At the upper end portion of (11), the base plate (15) exposed on the top side of the foundation extends outside the anchor bolts (11) and (11) in the same manner as the fixing plate (12). The anchor bolts (11) (1) that are fitted and project upward from the base plate (15).
The nuts (16) and (16) are screwed onto the upper end of (1). The anchor bolts (11) and (11) are installed at the column base fixing portions in the longitudinal direction of the foundation with the fixing plate (12) and the base plate (15) attached as described above.

(18) shows a first reinforcing bar unit arranged along the linear direction of the foundation. (19) (19) is a pair of upper and lower horizontal bars that are two reinforcing bars (20) bundled in the width direction,
These horizontal main bars (19) (19) are arranged in parallel vertically with an interval in the vertical direction. (21) (21) ... are star wraps arranged at intervals in the longitudinal direction of the foundation, and the upper and lower ends of the star wraps (21) (21) ... are bent in a U shape or an inverted U shape. , Inside the U-shaped bent portion (22) (22), the transverse main bars (19) (19) are arranged,
The stirrup (21) connects the upper and lower horizontal bars (19, 19). Furthermore, one abdominal muscle (23) is arranged along the longitudinal direction of the foundation and is fixed to the stirrup (21) so as to straddle the vertical middle part of the stirrup (21) (21). .

The first rebar unit (18) passes through the space between the anchor bolts (11) and (11) in the portion where the anchor bolts (11) and (11) are installed as shown in the figure. Are arranged as follows. In the figure, (24) indicates the placed concrete foundation.

FIGS. 4 and 5 show the reinforcement structure of the corner portion of the foundation. In this corner portion, the volume of concrete is insufficient only by the reinforcement foundation by the first reinforcing bar unit (18). In order to do so, the cage-shaped second reinforcing bar unit (25) as shown in FIG. 5 is arranged. This second rebar unit (25) has a plurality of rectangular frame-shaped hoops (26) (26), which are arranged at a vertical interval, and the outside of the corners of these hoops (26) (26). As shown in FIG. 4, a pair of anchor bolts (11) (11), which are composed of four longitudinal main bars (27) (27) arranged so as to connect between them, and are arranged in the longitudinal direction of the foundation. It is installed at the corner so that it surrounds. The first rebar unit (18) is arranged so as to pass through the second rebar unit (25). Further, the first reinforcing bar units (11) (11) are connected by an L-shaped connecting bar unit (28) at a corner portion.

In the above, the first rebar unit (18)
Does not arrange the horizontal main reinforcements (19) in two rows at intervals in the width direction of the foundation as in the past, but only one row, so the width of the foundation is reduced by that amount and the amount of concrete and reinforcing bars is reduced. It is possible. In this case, the horizontal bar (19)
Two reinforcing bars (20) (20) are bundled in the left-right direction. It is possible to use one with a large diameter, but then, the construction work standard specifications
5 When bending a reinforcing bar by reinforced concrete construction, the inside diameter of the bend becomes large and the fitting becomes poor. Therefore, in this embodiment, this is done to improve the fitting of the corners in particular. Is. Further, the stirrup (21) is bent at both upper and lower ends into a U shape so as to connect the upper and lower horizontal main bars (19) and (19), but like the conventional stirrup, it is formed into a ring shape. May be.
However, in this case, the amount of rebar increases excessively.

[0014]

As described above, according to the present invention, the basic bar arrangement including the column base is composed of a pair of upper and lower transverse main bars, a stirrup and an abdominal muscle arranged as necessary. , The width of the foundation can be made smaller, and the amount of reinforcement of the foundation and the amount of concrete can be reduced, and the cost can be reduced, as compared with the conventional one in which the horizontal main bars are arranged at intervals in two rows in the width direction. It can be reduced. In other words, in a small-scale house with two or three floors, such a narrow foundation is sufficient, and it is possible to realize a foundation with sufficient strength and low cost. is there.

Further, according to the present invention, as described above, since the column base portion, which is the anchor bolt portion, has the same reinforcement arrangement, the foundation of the column base portion does not project in the width direction, and the formwork construction is performed. And the interior design can be facilitated.

In addition, according to the invention of claim 2 of this application, since the cage-shaped reinforcing bars are arranged and reinforced at the corner portions, the volume of concrete at the corner portions is insufficient. There is no problem. In addition, it is possible to make the width of other parts wide by the amount of the cage-shaped reinforcing bars arranged only at the corners, and in this case the construction of the formwork becomes a little complicated, but This has the effect of significantly reducing the amount of concrete.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a concrete foundation in a column base portion showing an embodiment of the present invention.

FIG. 2 is a plan view showing the basic concrete across the same.

FIG. 3 is a perspective view of a main part showing an arrangement structure of anchor bolts and reinforcing bars.

FIG. 4 is a cross-sectional plan view of a foundation showing a layout structure of reinforcing bars and anchor bolts in a corner portion of the foundation.

FIG. 5 is a perspective view of a cage-shaped second reinforcing bar unit that is also arranged in a corner portion.

FIG. 6 is a perspective view of a main part of a basic bar arrangement used in a conventional small-scale building.

[Explanation of symbols]

 (11) Anchor bolt (18) First reinforcing bar unit (19) Transverse bar (21) Stirrup (23) Abdominal muscle (25) Second bar unit (26) Hoop (27) Longitudinal bar

Claims (2)

[Claims] 1. A pair of horizontal main bars in the vertical direction along the basic longitudinal direction, a plurality of star wraps arranged at intervals in the basic longitudinal direction and connecting the horizontal main bars, and, if necessary, in the vertical direction of the star wrap. An exposed type fixed column base reinforcing bar foundation comprising an abdominal muscle arranged in an intermediate portion and anchor bolts arranged at the column base fixing portion. 2. A pair of horizontal main bars in the vertical direction along the longitudinal direction of the foundation, a plurality of star laps arranged at intervals in the longitudinal direction of the foundation and connecting the horizontal main bars, and, if necessary, in the vertical direction of the star wrap. It is composed of abdominal muscles arranged in the middle part, and anchor bolts are arranged in the column base fixing portion, and in addition to the reinforcing bars, a plurality of vertical main bars and the vertical main bars are connected to the corners. A bar-shaped reinforcement base for an exposed fixed column base, characterized in that a cage-shaped reinforcing bar composed of a plurality of hoops is arranged.