JPH06346465A - Foundation structure and its construction - Google Patents

Abstract

PURPOSE:To unify a foundation and an earth floor, by leaving a disposable form for a foundation in the excavation ditch and fixing the peripheral edge to the form so as to surround the laid plates on earth floor by the foundation and placing concrete on the earth floor subsequently to the foundation. CONSTITUTION:An excavated ditch 1 for an individual foundation and an excavation ditch 2 for an underground beam are cut in the ground and rubbles are laid don on the whole bottom of the excavation ditch 1 for individual foundation and leveling concrete is placed. In this case, reinforcements 8 are arranged in the concrete subsequently to the foundation and the earth floor and a disposable form for individual foundation, a disposable form 4 for underground beam, laid plates 12 on the earth floor are all fixed the bottom and sides and unified together. And the rugged face on the earth floor is covered with the laid plates 12 of the earth floor. In this way, increase of construction cost due to the ground leveling of earth floor, extension of construction period, damage and deformation of disposable forms 4, are all can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation structure and a construction method thereof. More specifically, the present invention relates to an improvement in the foundation structure of a building constructed in a root-cutting groove that is dug in the ground around the soil and a construction method suitable for constructing the foundation structure.

[0002]

2. Description of the Related Art Conventionally, as a basic structure and a method of constructing a basic structure, for example, one described in Japanese Patent Application Laid-Open No. 2-248527 is known.

The conventional foundation structure and the method of constructing the foundation structure are those in which the foundation and the soil are integrated, and the foundation is a scrap type of the foundation that is buried in the root cutting groove inside the root cutting groove dug in the ground. After burying the frame and backfilling the surroundings of the scrap frame, level the soil surrounded by the foundation, level the ground with gravel, scrap concrete, etc., and place concrete continuously between the foundation and the soil It is built.

[0004]

In the above-described conventional foundation structure and foundation structure construction method, the construction cost is increased due to the requirement for soil leveling work, and the construction period becomes long. There is a problem that the scrap frame and the like are damaged or lose their shape.

The present invention has been made in view of the above problems, and is suitable for implementing a foundation structure capable of integrating foundations and soils without requiring soil leveling work, and for implementing this foundation structure. It is an object of the present invention to provide a construction method of a basic structure.

[0006]

In order to solve the above-mentioned problems, the basic structure according to the present invention is, as described in claim 1, a foundation scraping frame to be buried in a root cutting groove, and a foundation. The method consists of an interstitial board that is laid in the soil surrounded by and the periphery is fixed to the scrap frame of the foundation, and concrete that is continuously placed between the foundation and the soil.

Further, as described in claim 2, claim 1
In the basic structure of 1), the means characterized in that the concrete is provided with reinforcing bars continuously arranged between the foundation and the soil.

Further, in the method for constructing a foundation structure according to the present invention, as described in claim 3, a foundation scraping frame to be buried in the root cutting groove is formed inside the root cutting groove dug in the ground. After burying and backfilling around the scrap frame, lay an earthen floor board in the soil surrounded by the foundation, fix the peripheral edge of the earthen floor board to the waste frame of the foundation, and continuously concrete between the foundation and the soil. Adopt a means of placing.

Further, as described in claim 4, claim 3
In the method of constructing a foundation structure of 1), a means characterized by continuously arranging reinforcing bars between the foundation and the soil before placing concrete is adopted.

[0010]

According to the above-mentioned means, according to the first aspect, since the unevenness of the soil can be covered with the soil floor plate, a foundation structure capable of integrating the foundation and the soil without requiring ground leveling work of the soil is provided. That problem is solved.

According to a second aspect of the present invention, in the operation of the first aspect, continuous reinforcing bars are arranged between the integrated foundation and soil.

According to the third aspect of the present invention, since the earthen floor slab can be fixed by installing a waste frame in the root cutting groove, it is easy to lay the earthen slab, which is suitable for implementing the above-mentioned basic structure. The problem of providing a construction method for a foundation structure is solved.

According to the fourth aspect of the present invention, in the operation of the third aspect, the reinforcing bars of the foundation are continuously arranged in the soil.

[0014]

Embodiments of the basic structure and the construction method thereof according to the present invention will be described below with reference to the drawings.

In this embodiment, the foundation is shown as consisting of independent foundations arranged at regular intervals and underground beams arranged between the independent foundations.

First, an embodiment of the method for constructing the foundation structure according to the present invention shown in FIGS. 2 to 12 will be described.

In this embodiment, first, a deep independent root cutting groove 1 for constructing an independent foundation on the ground and a shallow underground beam root cutting groove 2 for constructing an underground beam are dug (Fig. 2).

The moat-grooved independent foundation root-cutting groove 1 and underground beam root-cutting groove 2 substantially match the shapes and sizes of the independent foundation and the underground beam to be constructed. That is, as shown in FIG. 5, the interval S between the side wall of the root cutting groove 1 for the independent foundation and the scrap frame 3 for the independent foundation is short (not shown in the drawing, the root cutting groove 2 for the underground beam). The same is true of the distance between the side wall and the scrap frame 4 for the underground beam). Therefore, the overcutting amount of the root cutting groove 1 for the independent foundation and the root cutting groove 2 for the underground beam is reduced.

Subsequently, a split stone 5 is laid on the entire bottom of the root cutting groove 1 for the independent foundation, and the compacted stone 6 is cast on the rolled stone 5 (see FIG. 3). At this time, the split stones 5 and the waste concrete 6 are not installed on the bottom of the root beam groove 2 for the underground beam.

After that, the upper open and lower open independent foundations assembled and unitized outside the root cutting groove 1 for the independent foundation without performing marking (simple center point may be performed). Suspend the waste form 3 with a crane (Fig. 4
(See FIG. 5), and it is dropped from above the root cutting groove 1 for independent foundation and installed on the waste concrete 6 (see FIG. 5).

Further, the upper open-bottomed bottomed bottom beam form frame 4 assembled and unitized outside the underground beam root cutting groove 2 is hung by a crane or the like (see FIG. 6), and the bottom beam root It is dropped from above the kerf 2 and installed on the bottom (see FIG. 7).

After the installation of the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam is completed, the scrap frame 3 for the independent foundation 3 and the scrap frame 4 for the underground beam are bolted or welded. Connect and fix. By this connection and fixing, the construction of the independent foundation scrap frame 3 and the underground beam scrap frame 4 is completed.

In connecting and fixing the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam, the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam are used.
Is provided in the scrap frame 3 for the independent foundation, and the scrap frame 3 for the independent foundation 3 and the scrap frame 4 for the underground beam are firmly integrated. .

In the construction of the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam, troublesome and complicated work is performed inside the root cutting groove 1 for the independent foundation 1 and the root cutting groove 2 for the underground beam. Therefore, there is no problem even if the interval S is short. Also,
The underground formwork 4 for underground beams is formed in a bottomed shape with a bottom plate 4 ', and there is no problem even if the ground grooving groove 2 for underground beams is not grounded with split stones 5 and waste concrete 6. Absent.
In addition, since it is a drop-in installation method, even if there are obstacles or the like in the surroundings, it can be surely constructed.

Immediately after the scrap frames 3 for the independent foundation and the scrap frames 4 for the underground girder are built, immediately around the scrap frames 3 for the independent foundation and the scrap patterns for the underground beam 4, the roots for the independent foundation are formed. The cut groove 1 and the root cutting groove 2 for the underground beam are backfilled with the excavated earth 7 (see FIG. 8).

By this backfilling, it is possible to prevent workers from falling down due to unnecessarily continuing the open state of the root cutting groove 1 for the independent foundation and the root cutting groove 2 for the underground beam, thus ensuring the safety of construction. Contribute to improvement. In addition, the side walls of the root cutting groove 1 for the independent foundation and the root cutting groove 2 for the underground beam and the side walls of the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam are pressed by the earth cutting 7 to form the ground for the independent foundation. It contributes to the stabilization of the independent foundation scrap frame 3 and the underground beam scrap frame 4 inside the root cutting groove 1 and the underground beam root cutting groove 2.

After backfilling the surroundings of the independent foundation scrap frame 3 and the underground beam scrap frame 4, the soil surrounded by the independent foundation scrap frame 3 and the underground beam scrap frame 4. An earth floor plate 12 made of a steel plate or the like is laid, and the peripheral edge of the floor plate 12 is fixed to the independent foundation scrap frame 3 and the underground beam scrap frame 4 by bolting, welding, or the like (see FIG. 9).

In the laying of the soil floor plate 12, since the uneven portion in the soil is covered to form a flat soil surface, the soil leveling work as in the conventional example is unnecessary. Therefore, there is no possibility that the construction cost will increase due to the ground leveling work on the soil, the construction period will become long, and the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam will not be damaged or deformed. In addition, as shown in FIG. 15, it is also possible to make the earthen floor board 12 a corrugated plate shape in which small irregularities are continuous.

After the laying of the floor plank 12, outside of the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam, the inside of the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam and Lattice frame-shaped rebar 8 assembled and united so as to be continuous over the entire floor of the earthen floor 12 is hung by a crane or the like (see FIG. 10), and the scrap frame 3 for the independent foundation and the scrap mold for the underground beam are used. It is dropped from above the frame 4 and the floor-to-earth floor plank 12, and is arranged inside the waste frame 3 for the independent foundation and the bottom-frame for the underground beam 4 and the upper portion of the floor-bed floor board 12 (Fig. 1).
1, see FIG. 12).

In such a reinforcing bar 8 arrangement, there are no obstacles or the like around the scrap frame 3 for the independent foundation without the trouble and complicated work inside the scrap frame 4 for the underground beam. However, it can be constructed reliably. In addition, if a jack is provided on a gate-shaped stand installed so as to straddle the upper edge of the bottom beam 4 for the underground beam and the reinforcing bar 8 is hung, the work becomes simple and accurate.

After the reinforcing bars 8 are arranged, concrete 9 is continuously placed inside the scrap frames 3 for the independent foundation and the scrap frames 4 for the underground beams and on the upper part of the floor plate 12 ( Figure 1
3, see FIG. 14).

In addition to the embodiment of the method for constructing a foundation structure according to the present invention shown above, in the case of a small scale, the scrap frame 3 for the independent foundation and the scrap frame 4 for the underground beam are used for the independent foundation. Root cutting groove 1,
It is also possible to adopt an embodiment in which the root cutting groove 2 for underground beam is connected and fixed and then the root cutting groove 1 for independent foundation and the root cutting groove 2 for underground beam are built.

Further, an embodiment is possible in which the reinforcing bars 8 are individually assembled and unitized in the inside of the scrap frame 3 for the independent foundation 3 and the scrap frame 4 for the underground beam and the upper part of the floor plate 12. Is.

Next, based on the embodiment of the basic structure according to the present invention shown in FIG. 1, the features of the basic structure constructed by the method for constructing the basic structure according to the present invention will be described.

In the foundation structure M of this embodiment, the independent foundation, the underground girder and the soil are integrated by the seamless concrete 9 as in the above-mentioned conventional example, so that corrosion from the joint does not occur. . And this concrete 9
Furthermore, it is integrated by the internal reinforcing bar 8 and the bottom part and the side part are provided with the independent foundation scrap frame 3, the underground beam scrap frame 4, and the earth floor plate 12.
Are integrally fixed to strengthen the basic structure M.

[0036]

As described above, the basic structure according to the present invention is
Since the unevenness of the soil can be covered with the soil floor plate, there is an effect that the foundation and the soil can be integrated without requiring soil leveling work. Further, due to this effect, there is an effect that the construction cost is increased due to the soil leveling work, and the construction period can be extended, damage to the scrap frame and the like and the shape collapse can be prevented.

Further, the foundation structure according to the present invention has the effect of strengthening the integration between the foundation and the soil by the continuous reinforcing bars only as defined in claim 2.

Further, the construction method of the foundation structure according to the present invention is the same as that of claims 3 and 4, and since the soil floor plate can be fixed by installing a scrap frame in the root cutting groove, the earth floor plate can be installed. There is an effect that it is easy and suitable for implementing the above-mentioned basic structure.

Further, the method of constructing a foundation structure according to the present invention has the effect that, only in claim 4, the reinforcing bars can be efficiently arranged in the entire foundation and soil.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a basic structure according to the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a method for constructing a foundation structure according to the present invention, showing a first step.

FIG. 3 is a cross-sectional view showing a step that follows FIG.

FIG. 4 is a cross-sectional view showing a step that follows FIG.

FIG. 5 is a cross-sectional view showing a step that follows FIG.

FIG. 6 is a cross-sectional view showing a step that follows FIG.

FIG. 7 is a cross-sectional view showing a step that follows FIG.

FIG. 8 is a cross-sectional view showing a step that follows FIG.

9 is a sectional view of another section showing the same step as FIG. 8.

FIG. 10 is a cross-sectional view showing a step that follows FIGS. 8 and 9.

11 is a cross-sectional view showing a step that follows FIG.

12 is a sectional view of another section showing the same step as FIG.

FIG. 13 is a cross-sectional view showing a step that follows FIGS. 11 and 12.

14 is a sectional view of another section showing the same step as FIG.

FIG. 15 is an enlarged cross-sectional view showing a modified example of FIG.

[Explanation of symbols]

 1 Root cutting groove for independent foundation 2 Root cutting groove for underground beam 3 Waste form frame for independent foundation 4 Waste form frame for underground beam 7 Soil cutting 8 Reinforcing bar 9 Concrete 12 Slab

Claims (4)

[Claims] 1. A basic scrap frame that is buried in a root cutting groove,
A foundation structure consisting of an earthen floor laying board laid in the soil surrounded by a foundation and the periphery of which is fixed to the scrap frame of the foundation, and concrete continuously placed between the foundation and the soil. 2. The foundation structure according to claim 1, wherein concrete is provided with a foundation and a reinforcing bar continuously arranged in the soil. 3. A soil sill surrounded by the foundation after a foundation sill frame to be buried in the root sill is built inside the root sill that has been dug into the ground and backfilled around the periphery of the foundation sill. A method of constructing a foundation structure in which an earthen floor board is laid on the ground, the periphery of the earthen floor board is fixed to a scrap frame of the foundation, and concrete is continuously placed between the foundation and the soil. 4. The method for constructing a foundation structure according to claim 3,
A method for constructing a foundation structure characterized by continuously arranging reinforcing bars between a foundation and a soil before placing concrete.