JP2006057365A - Foundation structure of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize the purpose that intricacy of construction and dangerous nature are mitigated even if an opening is provided in the foundation. <P>SOLUTION: In the foundation structure 1, an opening K is formed in the foundation 100 of the building. The foundation 100 is provided with a foundation part 10 with a beam function including the position forming the opening K and the chief foundation part 20 connected to both sides of the foundation part 10 with the beam function. The lower part main reinforcements of the foundation 100 is constituted of the first lower main reinforcement section 11A arranged longitudinally at the upper side from the opening K in the foundation part 10, the second lower main reinforcements part 21A arranged longitudinally in the lower part than the first lower main reinforcement section 11A in the chief foundation part 20, and the third lower main reinforcement part 31 connecting the first lower main reinforcement part 11A and the second lower main reinforcements part 21A. It is characterized in that an upper main reinforcement is arranged above the lower main reinforcement and the upper part than the opening K in the beam function foundation part 10 functions as a beam by means of the upper main reinforcement and the lower main reinforcement. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a foundation structure of a building in which an opening is provided in the foundation.

Conventionally, pipes for lifelines and ventilation openings for ventilation are provided on the foundations of structures. In particular, the pipes are often provided concentrated on a predetermined position of the building, and a plurality of pipes penetrate the foundation. In such a case, an opening may be provided in advance in the foundation, and piping may be installed through the opening through the piping.
The foundation is RC, and is composed of concrete, upper main bar, lower main bar and power bar. The upper main bar and the lower main bar are arranged in the longitudinal direction with the upper main bar arranged in the upper part of the foundation, and the lower main bar arranged in parallel to the upper main bar. A plurality of force distribution bars are arranged between the upper main bar and the lower main bar in the short side direction and the long side direction.
The opening provided in such a foundation is usually provided between the upper main bar and the lower main bar. In that case, reinforcement bars to prevent cracks from entering the periphery of the opening, especially at the four corners, after the concrete is placed, should be bridged between the upper main bar and the main bar and the lower main bar and the main bar. It arrange | positions diagonally (for example, refer patent document 1).
JP 2002-266356 A (paragraphs 0020 to 0041, FIG. 2)

However, when providing openings according to the standards of reinforced concrete construction, it is necessary to comply with the design standards and construction standards for reinforcing the openings, which increases the amount of rebar processing (for example, cutting and reinforcement) at the construction site. There is a problem that the work of providing reinforcing bars around the part becomes complicated.
In particular, when the size of the opening becomes larger due to the number of pipes to be provided and it becomes necessary to cut the lower main bar, the restriction required for reinforcement becomes large, so that the foundation is not destroyed at the position of the opening. In addition, it was necessary to provide a number of reinforcing bars around the formwork of the opening. Moreover, when providing an opening part concentrated on a predetermined position, since a reinforcing bar must be provided for every opening part, there also exists a problem that workability | operativity is bad.
In addition, since the foundation construction is performed in a narrow space, there is also a problem that in such a construction environment, there is a risk of injury at the end of the reinforcing bar or the end of the binding wire.

  Therefore, an object of the present invention is to solve the above-described problems and to provide a foundation structure of a structure that reduces the complexity and risk of construction even when an opening is provided on the foundation.

  In order to solve the above problems, the present invention provides a building foundation structure in which an opening is provided in a foundation of a building, wherein the foundation includes a beam function foundation portion including a position to be the opening, and the beam function. A main base part connected to both sides of the base part, and a first lower main bar part arranged in the longitudinal direction above the opening in the beam functional base part, and the first base part in the main base part A second lower main reinforcing bar disposed in the longitudinal direction below the lower main reinforcing bar, and a third lower main reinforcing bar connecting the first lower main reinforcing bar and the second lower main reinforcing bar. The upper main bar is disposed above the lower main bar, and the portion above the opening of the beam functional base functions as a beam by the upper main bar and the lower main bar. Features.

In this way, by arranging the first lower main reinforcing bar constituting the lower main reinforcing bar above the opening provided in the beam functional foundation, the opening can be provided without cutting the lower main reinforcing bar. It has become.
In the beam functional foundation, the first lower main bar and the upper main bar constituting the lower main bar arranged above the opening part are horizontally mounted on the main base part on both sides. Therefore, a plurality of openings can be provided at arbitrary positions in a range below the first lower main reinforcement of the beam functional foundation.
The first lower main reinforcing bar portion is disposed at a height away from the opening by a necessary cover thickness.

  Further, the present invention is a building foundation structure in which an opening is provided in a foundation of the building, the foundation including a position to be the opening, and in a longitudinal direction above the position to be the opening. A beam function foundation comprising a beam function panel bar having a first lower main bar portion arranged and a first upper main bar portion arranged in the longitudinal direction above the first lower main bar portion, and the beam function Connected to both sides of the base, and disposed below the first lower main reinforcement in the longitudinal direction and above the second lower main reinforcement in the longitudinal direction. A main base part having a main panel bar having a second upper main bar part, the first lower main bar part, the second lower main bar part, the first lower main bar part, and the second main bar part. The lower main reinforcement of the foundation is constituted by a third lower main reinforcement connecting the lower main reinforcement of the first main reinforcement, The upper main reinforcement of the base and the second upper main reinforcement constitute the upper main reinforcement of the foundation, and the upper part of the beam functional foundation functions as a beam by the upper main reinforcement and the lower main reinforcement. It is characterized by doing.

Thus, since the beam functional panel bar has the first lower main bar part and the first upper main bar part, the bar function base part can be easily arranged. Similarly, because the main panel bar has the second lower main bar part and the second upper main bar part, the main base bar can be easily arranged.
In addition, since the first lower main reinforcing bar constituting the lower main reinforcing bar is arranged above the opening provided in the beam function basic part, the opening can be provided without cutting the lower main reinforcing bar. Yes.
Further, by connecting the third lower main reinforcement portion to the second lower main reinforcement portion and the first lower main reinforcement portion, the lower main reinforcement can be integrated, so that it can be a foundation with high durability performance. It is like that.
Further, in the beam functional foundation, the portion above the opening is formed by the first lower main reinforcing bar constituting the lower main reinforcing bar arranged above the opening and the first upper main reinforcing bar constituting the upper main reinforcing bar. Since it functions as a beam horizontally mounted on the side main foundation, a plurality of openings can be provided at arbitrary positions in the range below the first lower main reinforcement of the beam functional foundation. It has become.

  Moreover, this invention is invention of Claim 1 or Claim 2, Comprising: The said 3rd lower main reinforcement part is an upper connection part connected in parallel with a said 1st lower main reinforcement part, The said, A lower connecting portion connected in parallel with the second lower main reinforcing portion, and an inclined portion that obliquely connects the upper connecting portion and the lower connecting portion, and the upper connecting portion, the lower connecting portion and the inclined portion The part is integrally formed.

  In this way, the third lower main reinforcement portion obliquely connects the upper connection portion connected to the first lower main reinforcement portion, the lower connection portion connected to the second lower main reinforcement portion, the upper connection portion, and the lower connection portion. Since the first lower main bar part and the second lower main bar part are arranged in steps, the first lower main bar part and the second lower main bar part can be easily connected. .

  Moreover, this invention is invention of Claim 2, Comprising: The reinforcing bar for joints which joins the said 1st upper main reinforcing bar part of the said beam functional foundation part and the said 2nd upper main reinforcing bar part of the said main basic part. May be provided.

  As described above, since the reinforcing bars for joints are provided so as to join the first upper main reinforcing bar and the second upper main reinforcing bar in the longitudinal direction, the integrity of the beam functional basic part and the main basic part can be improved. Can be done.

According to the foundation structure of such a structure, since the portion above the opening of the beam functional foundation functions as a beam, the work of providing reinforcing bars around the provided opening is reduced, The workability of the foundation can be improved.
Moreover, construction cost can be reduced by improving the workability of the foundation.
Moreover, the function as a beam of a beam functional base part can be improved by arrange | positioning the joint reinforcement between an upper main bar and a lower main bar.

Next, the best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an example of the basic structure of a building according to the present invention. FIG. 2 is a side view seen from the direction of arrow A in FIG. 1 and is a side view showing an example of a construction process for the foundation structure of the building of the present invention. FIG. 3 is a side view showing the process following FIG.
In the present embodiment, the building will be described as a house.

  As shown in FIG. 1, the building foundation structure 1 according to the embodiment of the present invention can be provided with an opening K in the foundation 100 without cutting the upper main bar and the lower main bar of the foundation 100. ing. Further, the foundation 100 in the building foundation structure 1 is made of RC, and includes a beam functional foundation 10 and a main foundation 20.

The beam function base portion 10 is provided with a beam function panel 11 having a first lower main reinforcing bar portion 11A, a first upper main reinforcing bar portion 11B, and a distribution bar H therein.
As shown in FIGS. 1 and 2 (a), the beam functional foundation 10 is connected to main foundations 20 and 20 described later on both sides thereof. That is, the beam functional foundation 10 is sandwiched between the main foundations 20 and 20. Moreover, in the beam functional foundation 10, the upper part from the provided opening K functions as a beam.

Here, the beam functional panel 11 serves as a skeleton for causing the upper portion of the beam functional foundation 10 to function as a beam.
As shown in FIG. 1, the beam functional panel 11 is provided with a first lower main reinforcing bar portion 11A that constitutes a lower main reinforcing bar in the longitudinal direction above the region where the opening K is provided. A first upper main muscle portion 11B that constitutes the upper main muscle in the longitudinal direction above the main muscle portion 11A is disposed, and between the first lower main muscle portion 11A and the first upper main muscle portion 11B, A plurality of strength bars H are arranged in the longitudinal direction and the short direction.
Therefore, with the first lower main reinforcing bar portion 11A of the beam functional panel 11 as a boundary, the lower part leaving a predetermined cover thickness from the arrangement position of the first lower main reinforcing bar portion 11A may arbitrarily provide an opening. The upper portion including the first lower main reinforcing bar portion 11A becomes a skeleton for allowing the upper portion of the beam functional foundation portion 10 to function as a beam.

  11 A of 1st lower main reinforcement parts are elongate reinforcing bars, Comprising: It arrange | positions over the full length of the beam functional panel 11, and plays the role as a lower main reinforcement. Similarly, the first upper main reinforcing bar portion 11B is also a long reinforcing bar, and is arranged over the entire length of the beam functional panel 11 and serves as the upper main reinforcing bar. Further, the distribution bar H arranged in the short direction has an L-shape, and its lower end is bent in a direction to enter the inside of the building.

Moreover, as shown in FIG.1 and FIG.2 (b), it is between the 1st lower main reinforcement part 11A and the 1st upper main reinforcement part 11B, Comprising: Auxiliary reinforcement 11C in the vicinity of the 1st lower main reinforcement part 11A Is arranged. The auxiliary reinforcing bars 11C are arranged so that both end portions enter a predetermined position of a main panel 21 described later, in parallel with the first lower main reinforcing bar portion 11A, and are used as a part of the lower main reinforcing bar.
Similarly, another auxiliary reinforcing bar 11D is arranged between the first lower main reinforcing bar portion 11B and the first upper main reinforcing bar portion 11B in the vicinity of the first upper main reinforcing bar portion 11B. This auxiliary reinforcing bar 11D is arranged so that both end portions enter a predetermined position of a main panel 21 described later, in parallel with the first upper main reinforcing bar portion 11B, and is used as a part of the upper main reinforcing bar.

  As shown in FIG.1 and FIG.2 (a), in the main base part 20, the 2nd lower main reinforcement part 21A which is a long rebar in the inside, and the 2nd upper main reinforcement part which is a long rebar A main panel 21 having 21B and a distribution bar H is arranged. Here, the main panel 21 is provided with a second lower main reinforcing bar portion 21A that constitutes the lower main reinforcing bar in the longitudinal direction below the first lower main reinforcing bar portion 11A of the beam functional panel 11, and this second lower main reinforcing bar. A second upper main reinforcing bar portion 21B that constitutes the upper main reinforcing bar in the longitudinal direction above the portion 21A is arranged. And between these 2nd upper main reinforcement part 21A and the 2nd lower main reinforcement part 21B, the some strength bar H is arrange | positioned in the longitudinal direction and the transversal direction.

That is, the second lower main reinforcing bar portion 21 </ b> A is arranged at a position lower than the arrangement position of the first lower main reinforcing bar portion 11 </ b> A of the beam functional panel 11, and the second upper main reinforcing bar portion 21 </ b> B is the first of the beam functional panel 11. It arrange | positions in the same height position as the arrangement | positioning position of upper main reinforcement part 11B.
The strength bar H is arranged in the same manner as the strength bar H of the beam functional panel 11, and the shape of the strength bar H arranged in the short direction is the same.
The second lower main reinforcing bar portion 21A is arranged over the entire length of the main panel 21 and plays a role as a lower main reinforcing bar. Similarly, the second upper main reinforcing bar portion 21B is also arranged over the entire length of the main panel 21 and serves as the upper main reinforcing bar.

The beam functional panel 11 of the beam functional foundation 10 and the main panel 21 of the main foundation 20 are arranged at predetermined positions before the concrete is placed.
As shown in FIGS. 1 and 2A, the beam functional panel 11 and the main panel 21 are arranged with main panels 21 and 21 on both sides of the beam functional panel 11 so as to sandwich the beam functional panel 11. . In other words, the beam functional panel 11 is disposed between the main panels 21 and 21.

  In the beam functional panel 11 and the main panel 21 arranged side by side in this way, as shown in FIGS. 1 and 3A, the first of the beam functional panel 11 arranged with a step is provided. Between the lower main reinforcing bar portion 11A and the second lower main reinforcing bar portion 21A of the main panel 21, a third lower main bar constituting the lower main reinforcing rod portion connecting the first lower main reinforcing bar portion 11A and the second lower main reinforcing bar portion 21A. A lower main muscle portion 31 is disposed. Further, the first upper main reinforcing bar portion 11B of the beam functional panel 11 and the second upper main reinforcing bar portion 21A of the main panel 21 which are arranged at the same height position include the first upper main reinforcing bar portion 11B and the second upper main reinforcing bar portion 11B. A joint reinforcing bar 32 that joins the upper main reinforcing bar portion 21B is disposed.

As shown in FIG. 3A, the third lower main reinforcing bar portion 31 includes an upper connecting portion 31A, a lower connecting portion 31B, and an inclined portion 31C, and the upper connecting portion 31A, the lower connecting portion 31B, and the inclined portion 31C. Are integrally formed and serve to connect the first lower main reinforcing bar portion 11A and the second lower main reinforcing bar portion 21A.
The upper connecting portion 31A is connected to the end side of the first lower main reinforcing bar portion 11A in parallel with the first lower main reinforcing bar portion 11A of the beam functional panel 11.
The lower connecting portion 31B is connected to the end portion side of the second lower main reinforcing bar portion 21A in parallel with the second lower main reinforcing bar portion 21A of the main panel 21.
The inclined part 31C connects the upper connecting part 31A and the lower connecting part 31B so as to incline upward and obliquely in the direction of the opening K.
By connecting the first lower main reinforcement 11A and the second lower main reinforcement 21A with the third lower main reinforcement 31, the first lower main reinforcement 11A, the second lower main reinforcement 21A, and the third lower main reinforcement 21A are connected. The lower main reinforcement 31 can be integrated with the lower main reinforcement.

As shown in FIG. 3A, the joint reinforcing bar 32 plays a role of joining the first upper main reinforcing bar portion 11B and the second upper main reinforcing bar portion 21B, and the first upper main reinforcing bar portion 11B and the second upper main reinforcing bar portion 11B. It arrange | positions in parallel with the upper main reinforcement part 21B, and is arrange | positioned so that it may overlap with the 1st upper main reinforcement part 11B and the 2nd upper main reinforcement part 21B.
Thereby, the integrity of the upper principal muscle comprised by the 1st upper principal muscle part 11B and the 2nd upper principal muscle part 21B can be improved.
In addition, the reinforcing bar 33 for the reinforcing bar which joins these to the reinforcing bar H of the beam functional panel 11 arrange | positioned in a longitudinal direction and the distributing bar H of the main panel 21 is arrange | positioned suitably.

  In the beam functional panel 11 arranged in this way, an opening K can be provided below the first lower main reinforcing bar 11A of the beam functional panel 11. For example, when the opening K is provided in the lower center of the beam functional panel 11, the distribution bar H below the first lower main reinforcing bar 11A is cut so that the space S is slightly larger than the opening K. To do. Above this space S, a crack preventing rebar 34 whose center protrudes in an inverted V shape is arranged. Then, the pipe material P to be the opening K is disposed in the space S.

  As a result, the upper portion of the beam functional foundation portion 10 functions as a beam, and no load is applied to the lower portion of the first lower main reinforcing bar portion 11A of the beam functional foundation portion 10. The arrangement of reinforcing bars, which has been conventionally performed, is almost unnecessary around the portion K, and the foundation workability can be improved.

Next, the construction procedure of the foundation structure 1 of the building of the present invention will be described.
First, as shown in FIG. 2A, the beam functional panel 11 of the beam functional foundation 10 and the main panel 21 of the main foundation 20 are arranged at predetermined positions. At this time, the beam function panel 11 and the main panel 21 arrange the beam function panel 11 between the main panels 21 and 21 arranged at a predetermined interval. Then, as shown in FIG. 2B, the first upper main reinforcing bar portion 11B of the beam functional panel 11 and the second upper main reinforcing bar portion 21B of the main panel 21 are joined by the joint reinforcing bar 32, and the beam functional panel 11 The auxiliary lower bar 11C is arranged between the first lower main bar 11A and the first upper main bar 11B and in the vicinity of the first lower main bar 11A, and the first lower main bar of the beam function panel 11 is arranged. Another auxiliary reinforcing bar 11D is arranged between 11A and the first upper main reinforcing bar portion 11B and in the vicinity of the first upper main reinforcing bar portion 11B. At this time, the distribution bar H of the beam functional panel 11 and the distribution bar H of the main panel 21 are jointed by the joint bar 33 for the distribution bar.

  Next, as shown in FIG. 3 (a), the first lower main reinforcing bar portion 11A of the beam functional panel 11 and the second lower main reinforcing bar portion 21A of the main panel 21 which are arranged with steps are arranged on the A third lower main reinforcement 31 that connects the first lower main reinforcement 11A and the second lower main reinforcement 21A is disposed. Then, at the position where the opening K is provided, the distribution bar H below the first lower main reinforcing bar 11A is cut so that the space S is vacant to a degree slightly larger than the opening K. At this time, it is not necessary to cut the lower main reinforcing bar (first lower main reinforcing bar portion 11A), so that it is not necessary to perform complicated reinforcement. Moreover, as shown in FIG.3 (b), the crack prevention reinforcement 34 which the center protruded in the reverse V shape above this space S is arrange | positioned. Then, the pipe material P to be the opening K is disposed in the space S.

In this state, a formwork (not shown) is provided on the beam function panel 11 and the main panel 21, and concrete is laid to construct the foundation 100. When the mold is removed after the concrete is hardened, an opening K is formed in the beam functional foundation 10 including the beam functional panel 11.
As described above, in the building foundation structure 1 of the present invention, the upper portion from the opening K of the beam functional foundation portion 10 of the constructed foundation 100 is formed as a beam by the first lower main reinforcement portion 11A and the first upper main reinforcement portion 11B. Can function. Therefore, any number of openings K can be provided in the region below the first lower main reinforcing bar portion 11A of the beam functional foundation portion 10.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, in this embodiment, the reinforcing bars are arranged with the beam function panel 11 and the main panel 21 and various reinforcing bars are provided as necessary. However, the arrangement of reinforcing bars is not limited to this, and each reinforcing bar is one. Even if it is assembled one by one, the same effect as the present embodiment can be obtained.
Moreover, although the case where the provided opening part is one is demonstrated in this embodiment, as long as the opening part is below 11 A of 1st lower main reinforcement parts, you may provide two or more.
The foundation may be a cloth foundation or a solid foundation.

It is a perspective view which shows an example of the foundation structure of the building of this invention. It is a side view which shows an example of the construction process of the foundation structure of the building of this invention. FIG. 3 is a side view showing a step following FIG. 2.

Explanation of symbols

1 Building foundation 10 Beam functional foundation 11 Beam functional panel 11A First lower main bar (lower main bar)
11B First upper main muscle (upper main muscle)
11C Auxiliary rebar (lower main bar)
11D Auxiliary rebar (upper main bar)
20 Main foundation 21 Main panel 21A Second lower main reinforcement (lower main reinforcement)
21B Second upper main muscle (upper main muscle)
31 Third lower major muscle (lower major muscle)
31A Upper connection part 31B Lower connection part 31C Inclined part 32 Joint reinforcement 33 Joint reinforcement for distribution bar 34 Crack prevention reinforcement H Distribution bar K Opening

Claims (4)

A building foundation structure with an opening in the foundation of the building,
The basis is
A beam functional foundation including a position to be the opening;
A main foundation connected to both sides of the beam functional foundation,
A first lower main reinforcing bar arranged in the longitudinal direction above the opening in the beam functional foundation, and a second arranged in the longitudinal direction below the first lower main reinforcing part in the main foundation. The lower main reinforcement portion and the third lower main reinforcement portion connecting the first lower main reinforcement portion and the second lower main reinforcement portion constitute the lower main reinforcement of the foundation,
An upper main bar is disposed above the lower main bar,
The part above the opening of the beam functional foundation is
A foundation structure of a building that functions as a beam by the upper main bar and the lower main bar. A building foundation structure with an opening in the foundation of the building,
The basis is
The first lower main reinforcing bar portion including the position to be the opening and disposed in the longitudinal direction above the position to be the opening and the first lower main reinforcing bar disposed in the longitudinal direction above the first lower main reinforcing bar. A beam functional foundation comprising a beam functional panel bar having one upper main bar;
Connected to both sides of the beam functional foundation, and disposed below the first lower main reinforcement in the longitudinal direction and above the second lower main reinforcement in the longitudinal direction A main base comprising a main panel bar having a second upper main bar disposed;
The first lower main reinforcement, the second lower main reinforcement, the third lower main reinforcement connecting the first lower main reinforcement and the second lower main reinforcement, and the lower lower reinforcement of the foundation Configure
The first upper principal muscle part and the second upper principal muscle part constitute the upper principal muscle of the foundation,
The part above the opening of the beam functional foundation is
A foundation structure of a building that functions as a beam by the upper main bar and the lower main bar.   The third lower main reinforcing portion is connected to the first lower main reinforcing portion in parallel with the upper connecting portion, the lower connecting portion connected in parallel to the second lower main reinforcing portion, and the upper connection. 3. The apparatus according to claim 1, wherein the upper connecting portion, the lower connecting portion, and the inclined portion are integrally formed. The basic structure of the building described in 1. The building foundation structure according to claim 2, further comprising a joint reinforcing bar that joins the first upper main reinforcing bar portion of the beam functional foundation portion and the second upper main reinforcing bar portion of the main basic portion. .

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