JPH04254616A - Construction of foundation for building - Google Patents

Abstract

PURPOSE:To construct a concrete strip footing for a building easily and correctly, and increase a strength at a position where vertical force of an upper load is applied largely at a part of the constructed strip footing especially where a column is placed. CONSTITUTION:Foundation cylinder bodies 4 opening at both of upper and lower ends and having a throughhole 6 are disposed at a plural positions of a broken stone foundation 3. A pair of formworks 8 for concrete strip footing are disposed facing each other between adjacent foundation cylinder bodies 4, and reinforcements 9 disposed in a facing space of the formworks penetrate the throughholes 6 in the foundation cylinder bodies 4. Concrete is placed in the facing space of the formwork 8 and inside the foundation cylinder bodies 4.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides the following features:
In addition to installing foundation cylinders with open upper and lower surfaces, formwork for cloth foundations is installed facing each other between adjacent foundation cylinders, and concrete is poured inside the space facing the formwork and inside the foundation cylinder. The present invention relates to a construction method for a building foundation, which is characterized in that it is poured.

0002

[Prior Art] In order to support wooden or steel buildings, a concrete cloth foundation is constructed by excavating the ground to a certain extent to follow the external shape of the building. The structure must not only be able to absorb directional loads, but also be safe from horizontal forces such as earthquakes and wind, as well as prevent members in contact with the foundation, such as the base and the lower ends of columns, from rotting due to moisture from underground. It is necessary to do so.

[0003] For this reason, conventional concrete foundations are constructed by excavating the ground to a certain depth and filling it with cracked stones, and then pouring concrete over the top of the cracked stones. A concrete cloth foundation was constructed by forming a concrete foundation and placing a pair of formworks facing each other on the top of the groundwork and pouring ready-mixed concrete. Then, a base made of wood, for example, is installed on the top surface of the concrete cloth foundation, and pillars are installed upright on the top surface of the base to form the wall surface.

0004

[Problem to be solved by the invention] However, since an extremely large vertical load is applied to the part where the pillar is erected, a particularly high pressure resistance is required in the part where the pillar is erected compared to other parts. be done. Additionally, columns are always erected at the corners of buildings, but when constructing a space with a concrete foundation using a pair of formwork as described above, pillars are always erected at the corners of buildings. Not only does construction require an extremely large amount of time and effort, but it also requires skill to perform the work, resulting in poor workability on construction sites.
This was a major obstacle during construction due to a labor shortage. Therefore, there is a need for a method for easily constructing a concrete cloth foundation that is sufficiently strong and has excellent workability.

[0005]

[Means for Solving the Problems] The present invention has been proposed in order to solve the above-mentioned drawbacks and problems as well as to satisfy the above-mentioned demands. A foundation cylinder with openings at both upper and lower ends and a through hole on one or the entire surface of the surrounding wall is placed on the cut-out structure, and a formwork for a concrete cloth foundation is placed between adjacent foundation cylinders. The present invention proposes a method for constructing a foundation for a building, characterized in that concrete is placed inside the opposing space of the formwork and inside the foundation cylinder.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on embodiments shown in the drawings. In the present invention, a shallow trench is excavated in the ground at a necessary position so as to substantially correspond to the planar shape of the building to be constructed, and the internal bottom of this trench is filled with split stones 1. Concrete 2 on top of
The concrete is poured to a certain thickness, and the upper surface is treated to be flat to form the hollow ground work 3.

[0007]Furthermore, foundation cylinders 4 are arranged at a plurality of desired positions on the upper surface of the above-mentioned cutting ground work 3. This basic cylinder 4
The location is at the corner or intersection of a building, especially where columns, steel frames, etc. are erected on the top surface.

The foundation cylinder 4 has a rectangular or cylindrical shape made of concrete with both upper and lower end surfaces open and a plurality of through holes 6 formed in a part or the entire surface of the peripheral wall 5. In addition, mesh-like reinforcing bars 7 may be buried inside the peripheral wall 5, and may be mass-produced in a factory, for example.

[0009] After the above-mentioned foundation cylinders 4 are carved and installed at desired positions on the upper surface of the ground work 3, formwork 8 for concrete cloth foundations is placed between the adjacent foundation cylinders 4 so as to face each other in a narrow space. . The formwork 8 is made of metal, for example, as in the conventional case.
Wooden boards can be used, and they are temporarily constructed so that a certain space exists between the opposing formworks 8, and both ends of both formworks 8 are in contact with the outer surface of the base cylinder 4, respectively. position. Further, the space between the pair of opposing formworks 8 is somewhat narrower than the width of the base cylinder 4. This is intended to make the width of the foundation tube 4 thicker than that of the fabric foundation to be constructed, thereby increasing its strength against loads from above.

As mentioned above, with the foundation cylinder 4 and the opposing formwork 8 temporarily installed on the upper surface of the warijiyo 3, reinforcing materials are placed in the space of the opposing formwork 8 along the length direction. A reinforcing bar cage, reinforcing bars, etc. 9 are installed. The tip of this reinforcing bar, etc. 9 extends through the through hole 7 to the inside of the base cylinder 4,
The base cylinder 4 may be arranged in a penetrating manner, and the base cylinder 4 may be arranged so as to be continuously inserted into the space between adjacent formworks 8 via the base cylinder 4.

[0011] Then, concrete is poured into the space facing the formwork 8 and inside the foundation cylinder 4 to construct the concrete cloth foundation 11, but before the concrete has cured and hardened, the foundation cylinder 4 is poured. The anchor 10 is positioned such that a portion thereof projects upwardly from the inside of the formwork 8, and a portion thereof projects upwardly from the inside of the opposing formwork 8.

[0012] Concrete within the interval of the formwork 8,
When the concrete inside the foundation cylinder 4 cures and hardens, the cloth foundation 11 is constructed, and the anchors 10 protrude from the positioned upper surface of the cloth foundation 11.The formwork 8 is removed and the foundation 12 is placed on the upper surface of the cloth foundation 11. What is necessary is to erect pillars and the like to form a wall surface. Therefore, the cloth foundation 11 formed as described above includes a plurality of foundation cylinders 4 filled with concrete, and a concrete portion located between adjacent foundation cylinders 4 and constructed by pouring concrete on-site. The base cylinder 4 and the concrete part are integrated with reinforcing bars 9, and have extremely high strength. In addition,
The through hole 6 of the base cylinder 4 through which the reinforcing bar 9 does not pass is formed by an appropriate means,
For example, it is preferable to block it with aggregate or plate material to prevent the concrete poured into the foundation cylinder 4 from flowing out.

Although the present invention has been described above based on the embodiments shown in the drawings, the present invention is not limited to the above-described embodiments, and can be modified in any way as long as the structure described in the claims is not changed. It can be implemented.

[0014]

[Effects of the Invention] In summary, according to the present invention, it is extremely easy to install formwork for constructing a cloth foundation, and building construction work can be carried out accurately and quickly without requiring any skill. can. Moreover, the strength of the part where the columns etc. are erected is particularly superior due to the base cylinder, so it has many practical effects such as high durability against the vertical force of the load from the top. be.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a part of an embodiment of a cloth foundation constructed by the construction method of the present invention.

FIG. 2 is a partial perspective view showing the arrangement of the base cylinder and the formwork.

FIG. 3 is a partially cutaway perspective view of the base cylinder.

FIG. 4 is a schematic plan view of the construction state of the cloth foundation.

[Explanation of symbols]

2. Discarded concrete 3 Wariguri land industry 4 Base cylinder 5 Peripheral wall 6 Through hole 8 Formwork 9 Rebar 11 Concrete cloth foundation

Claims (3)

[Claims] Claim 1: A foundation cylinder with openings at both upper and lower ends and through-holes formed in part or the entire surface of the peripheral wall is arranged on the top surface of the wariji construction, and between adjacent foundation cylinders there is a base cylinder for a concrete cloth foundation. A method for constructing a foundation for a building, characterized in that formwork is installed oppositely, and concrete is poured inside the space facing the formwork and inside the foundation cylinder. [Claim 2] A foundation cylinder with both upper and lower ends open and a through hole formed on one side or the entire surface of the peripheral wall is arranged on the top surface of the wariji, and a mold for a concrete cloth foundation is placed between the adjacent foundation cylinders. Frames are installed facing each other, reinforcing reinforcing bars are housed inside the opposing spaces of the formwork, and a part thereof extends from the through hole of the foundation cylinder to the inside of the foundation cylinder, and 1. A method for constructing a foundation for a building, characterized in that concrete is poured inside the space where the foundation is placed and inside the foundation cylinder. 3. The method for constructing a foundation for a building according to claim 1, wherein the foundation cylinder is a part on which a column is installed.