JP3726247B2 - Bar arrangement foundation of exposed fixed column base - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reinforcing bar base for an exposed fixed column base used in a small-scale building such as a private house.
[0002]
[Prior art]
FIG. 6 shows the basic reinforcement used in a conventional two- and three-story steel frame private house. In the figure, (1) is an anchor bolt for fixing the column base. At the column base where the bolt (1) is placed, the corners of the square hoops (2), (2), and the hoops (2), (2), ... spaced apart from each other as shown in the figure A cage-shaped rebar unit (4) consisting of four vertical main bars (3) connecting the four anchor bolts (1), (1), etc. In the part, there are four transverse main bars (5), (5), which are arranged at intervals in the width direction and the vertical direction of the foundation, and a large number of foundation longitudinal directions connected so as to surround the transverse principal bars (5) (5). Reinforcing bar units (7) consisting of the following stirrups (6), (6), etc. are arranged, and these units (4) (7) constitute the basic reinforcement It has to so that.
[0003]
[Problems to be solved by the invention]
The above-mentioned conventional bar arrangements are generally used for large-scale buildings such as office buildings, and are at least excessive arrangements for use in small-scale private houses of up to 3 stories. It was.
[0004]
That is, first, the cage-shaped reinforcing bar unit (4) as described above is arranged at the column base part, and the cage-shaped reinforcing bar unit (7) as shown in the figure is also arranged between the column base parts. Therefore, there is a drawback that the width of the foundation is increased as a whole, the amount of reinforcing bars and the amount of concrete are unnecessarily increased, and the cost is increased.
[0005]
Furthermore, since a special squirrel bar-shaped reinforcing bar unit (4) as shown in the figure is arranged on the column base, the bar arrangement becomes complicated and the design and construction is difficult. In addition, if the rebar unit (7) other than the column base is made small and the width of the foundation of this part is reduced, the amount of rebar and concrete can be reduced to some extent. The concrete protrudes in the width direction of the foundation, and the shape of the foundation is complicated, so that the formwork construction becomes difficult and the accommodation of the interior is also complicated.
[0006]
The present invention eliminates such conventional drawbacks, and does not unnecessarily increase the amount of reinforcing bars and concrete in a foundation for a small-scale private house of about 2 or 3 stories, and has sufficient strength. It was made for the purpose of providing a bar arrangement for a low-priced and small foundation concrete.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problem, the present invention includes a plurality of vertically arranged pair of horizontal main bars formed by bundling two reinforcing bars along the basic longitudinal direction and arranged at intervals in the basic longitudinal direction. connected between the lateral main reinforcement by stirrup, so as to straddle the vertical direction of the intermediate portion of its stirrup constitutes a reinforcement by placing abs, the column base fixing portion, two linked together An anchor bolt is provided.
[0008]
Similarly, in the invention of claim 2 of this application, a pair of vertical main bars formed by bundling two reinforcing bars are arranged along the basic longitudinal direction, and a plurality of horizontal main bars arranged at intervals in the basic longitudinal direction. connected between the lateral main reinforcement by stirrup, so as to straddle the vertical direction of the intermediate portion of its stirrup constitutes a reinforcement by placing abs, the column base fixing portion, two linked together In addition to the above bar arrangement, a cage-shaped reinforcing bar consisting of a plurality of vertical main bars and a plurality of hoops connected by the vertical main bars is provided at the corners of the foundation. It is characterized by.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show the arrangement structure of the reinforcing bar foundation and the anchor bolt in the straight portion of the concrete foundation. The anchor bolts (11) and (11) are composed of two pieces arranged at intervals in the foundation width direction, and a fixing plate (12) is screwed to each anchor bolt (11) and (11) at the lower end portion thereof. The fixed nuts 13 and 14 are supported and fixed from both upper and lower sides, and the lower ends of both anchor bolts 11 and 11 are connected by the fixing plate 12. Further, at the upper end portion of the anchor bolts (11) and (11), the base plate (15) exposed to the base top end side straddles both anchor bolts (11) and (11) in the same manner as the fixing plate (12). The nuts (16) and (16) are screwed onto the upper ends of the anchor bolts (11) and (11) that are externally fitted in this way and protrude upward from the base plate (15). The anchor bolts (11) and (11) are installed at each column base fixing portion in the foundation longitudinal direction with the fixing plate (12) and the base plate (15) attached as described above.
[0010]
(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 bundle two reinforcing bars (20) in the width direction. These horizontal bars (19) and (19) are vertically moved with vertical spacing. They are arranged in parallel. (21) (21) are stirrups arranged at intervals in the longitudinal direction of the foundation, and the upper and lower ends of the stirrups (21) (21) are bent into a U shape or an inverted U shape. The transverse main bars (19) and (19) are arranged inside the U-shaped bent portions (22) and (22), and the stirrup (21) is located between the upper and lower horizontal principal bars (19) and (19). It is connected. Further, one abdominal muscle (23) is arranged along the basic longitudinal direction so as to straddle the vertical middle portion of the star wrap (21) (21) and is fixed to the star wrap (21). .
[0011]
The first reinforcing bar unit (18) is arranged so that it passes through the space between the anchor bolts (11) and (11) in the part where the anchor bolts (11) and (11) are installed as shown in the figure. Has been. In the figure, (24) indicates the foundation concrete placed.
[0012]
4 and 5 show the reinforcement structure of the foundation corner portion, and in this corner portion, the volume of the concrete is insufficient only with the reinforcement foundation by the first reinforcing bar unit (18). A cage-shaped second reinforcing bar unit (25) as shown in FIG. 5 is arranged. The second reinforcing bar unit (25) includes a plurality of rectangular frame-shaped hoops (26), (26), which are spaced apart from each other, and outside the corners of the hoops (26), (26). A pair of anchor bolts (11), (11) arranged in the longitudinal direction of the foundation as shown in FIG. It is installed in the corner part so as to surround. The first reinforcing bar unit (18) is disposed so as to pass through the second reinforcing bar unit (25). The first reinforcing bar units (11) and (11) are connected to each other at the corner portion by an L-shaped connecting bar unit (28).
[0013]
In the above, the first reinforcing bar unit (18) does not arrange the horizontal main bars (19) in two rows at intervals in the width direction of the foundation as in the prior art. The width can be reduced to reduce the amount of concrete and rebar. In this case, the transverse main bar (19) is configured by bundling two reinforcing bars (20) and (20) in the left-right direction. It is possible to use a single large-diameter piece, but in that case, when bending the rebar by building construction standard specification, the same explanation JASS5 reinforced concrete work, the inner diameter of the bending becomes larger and fits. In this embodiment, this is done particularly in order to improve the fit of the corners. The star wrap (21) is bent in a U shape at both upper and lower ends so as to connect the upper and lower horizontal main bars (19) and (19). May be. However, in this case, the amount of reinforcing bars will increase accordingly.
[0014]
【The invention's effect】
As described above, according to the present invention, since the bar arrangement of the foundation including the column base portion is composed of the pair of upper and lower horizontal main muscles, the stirrup and the abdominal muscles arranged as necessary, The width of the foundation can be reduced by that amount compared to the arrangement of horizontal main bars spaced in two rows in the width direction, the amount of bar arrangement and the amount of concrete can be reduced, and the cost can be reduced. . In other words, in a small-scale house of about 2 or 3 stories, such a narrow foundation is sufficient, and it is possible to realize a low-cost foundation while having the necessary and sufficient strength. is there.
[0015]
Furthermore, in the present invention, as described above, since the column reinforcement is the same in the column base part which is the anchor bolt part, the foundation of the column base part does not protrude in the width direction, and the formwork construction is easy. In addition, an effect of facilitating interior design can be obtained.
[0016]
In addition, according to the invention of claim 2 of this application, since the squirrel-shaped reinforcing bars are arranged and reinforced in the corner portion, there is a problem that the volume of the concrete in the corner portion is insufficient. Absent. In addition, it is possible to reduce the width of the other part by making the corner-shaped part wide by the arrangement of the cage-shaped reinforcing bars. In this case, the construction of the formwork is somewhat complicated. The amount of concrete can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a concrete foundation in a column base portion showing an embodiment of the present invention.
FIG. 2 is a plan view crossing the foundation concrete.
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 the foundation showing the arrangement structure of reinforcing bars and anchor bolts at the corner corners of the foundation.
FIG. 5 is a perspective view of a cage-shaped second reinforcing bar unit that is also disposed at a corner portion.
FIG. 6 is a perspective view of a main part of a basic reinforcement used in a conventional small-scale building.
[Explanation of symbols]
(11) Anchor bolt
(18) First rebar unit
(19) Horizontal main muscle
(21) Stirrup
(23) Abdominal muscles
(25) Second rebar unit
(26) Hoop
(27) Longitudinal major muscle

Claims (2)

The vertical pair of lateral main reinforcement made by bundling the two reinforcing bars, and arranged along the underlying longitudinal direction by a plurality of stirrup which is spaced basic longitudinally connected between said horizontal main reinforcement, its The abdominal muscles are arranged so as to straddle the vertical middle portion of the stirrup of the wrapping, and the bar base fixing part is provided with two anchor bolts connected to each other. Reinforcement foundation of exposed fixed column base. The vertical pair of lateral main reinforcement made by bundling the two reinforcing bars, and arranged along the underlying longitudinal direction by a plurality of stirrup which is spaced basic longitudinally connected between said horizontal main reinforcement, its The reinforcement is constructed by arranging the abdominal muscles so as to straddle the vertical middle part of the stirrup, and two anchor bolts connected to each other are arranged in the column base fixing part, In addition to the above-mentioned bar arrangement, a cage-type reinforcing bar composed of a plurality of vertical main bars and a plurality of hoops connected by the vertical main bars is disposed. Reinforcement foundation.

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