JP4618413B2 - Foundation construction method, pressure device used in the construction method, and fabric foundation or solid foundation produced by the construction method - Google Patents

Description

The present invention relates to a foundation construction method capable of accurately leveling a fabric foundation or a solid foundation of a small-scale building, a pressure device used in the construction method, and a cloth foundation or a solid foundation manufactured by the construction method. About.

As is well known, there are cloth foundations and solid foundations for small-scale buildings including houses, and these foundations are composed of base concrete and rising concrete on the upper surface of level concrete.

And this foundation work has been made by a general construction method with a wooden formwork made by a base specialist such as a craftsman using auxiliary bars and veneers, and a forming formwork such as steel.

However, the formwork is large and very heavy, and it takes time to carry out maintenance such as repairing, nailing, cleaning, and oiling after carrying in the field and removing the mold. The current situation is that it takes a lot of labor for the technicians.

Here, the conventional foundation construction process will be described. , Curing, Inking, Rising formwork, Rising concrete casting, Curing, Formwork dismantling, Rolling with backfilling soil flooring, Claying concrete, Tenshin level mortaring, Top end mortar coating, Underfloor ventilation hole installation, Finishing makeup It requires a very large number of processes such as mortar coating, and requires many skilled workers, long days and many construction materials.

Moreover, although it is a part now, a forming mold, a driving mold, etc. are developed and researched, and it is also possible to complete in five days.

By the way, as the most important quality in such a foundation, firstly, it is possible to accurately level the top end face of the foundation rising portion and to increase the density of the entire foundation.

In the first point, conventionally, as shown in Patent Document 1, for example, using a measuring instrument called a leveler, the leveler is set at a predetermined height in the formwork, and then the concrete is placed in the formwork. The current situation is that the level of the top is set by placing it inside.

JP 2003-129490 A

As for the second point, a method is adopted in which a vibrator is inserted into the placed concrete to give vibration, and excess water and air are drawn to increase the density to prevent cracking.

However, in the above-described conventional foundation construction method, as described above, the first construction work and the second construction work are performed separately, so the construction process is complicated, and each construction work In addition to the need for skilled workers, the construction days also become longer, which is a factor that increases construction costs.

  The present invention has been developed in view of the current situation, and the object of the invention is to achieve the leveling of the top edge of the foundation of a foundation such as a fabric foundation or a solid foundation and the densification of these foundations at the same time. The foundation construction method that can simplify the construction process and significantly reduce the construction cost and the number of construction days, the pressure device used in the construction method, and the fabric foundation manufactured by the construction method Or it is going to provide a solid foundation.

In order to achieve the above object, in the foundation construction method according to claim 1, level concrete is placed on the leveled ground surface, and a base concrete formwork is used on the upper surface of the level concrete. Concrete is placed, and the base concrete is embedded with a lower portion of an anchor bolt for supporting the rising portion so that the tip portion extends vertically, and after the base concrete is hardened, the base concrete is After standing up the formwork for the rising part using the concrete surface, and then placing concrete in the above-mentioned form for the rising part up to a height above the desired top part level, the rising part by pressure of concrete in the rising portion formwork from top end face upward, the pressurizing pressure device includes a support member that is Kumi構the portal, vertical to the ceiling bottom of the support member Weight holding means, a weight mounted on the weight holding means so as to be movable up and down, and a lower end of the weight, and a lower end thereof is in contact with a seat provided on the top end surface of the rising portion. A pressure body, and configured to cause the load of the weight to act on the seat body via the pressure body, and in the concrete in the riser formwork with the pressure device Water and air mixed together are extracted, and the pressurization operation is stopped when the top end surface reaches a predetermined level.

In the foundation construction method according to claim 1, level concrete is cast on the leveled ground surface, and concrete is cast on the upper surface of the level concrete using a base concrete formwork, Under the base concrete, the lower part of the anchor bolt for supporting the rising part is embedded so that the tip part extends in the vertical direction. After the base concrete is hardened, the base concrete surface is used to stand up. Standing up the formwork for the part, and then placing the concrete in the above-mentioned form for the rising part up to the height of the desired rising part top end level, then the rising part mold from above the rising part top end surface Pressurize the concrete in the frame to extract water and air mixed in the concrete in the section, and when the top end surface reaches a predetermined level, Since it is characterized by canceling work, it is possible to achieve the leveling of the top of the foundation and increase the density of these foundations at the same time, simplify the construction process, and reduce the construction cost and the number of construction days. It can be greatly reduced. The structure of the pressurizing apparatus is very simple, the assembly and disassembly work is easy, and the desired pressurizing force can be easily obtained, so that the workability can be greatly simplified. As the jack device, a screw type jack device or a fluid pressure type jack device having a known configuration can be used.

Hereinafter, the present invention will be described in detail based on Example 1 shown in the accompanying drawings.

FIG. 1 is an explanatory view showing a production process of a base concrete of a foundation according to Example 1 of the present invention, FIG. 2 is an explanatory view showing a process of manufacturing a fabric foundation with the foundation according to Example 1, and FIG. FIG. 4 is an explanatory view showing an arrangement state example of the pressurizing device used in the first embodiment.

As shown in FIG. 1, in the foundation construction method according to the first embodiment, first, level concrete 2 is placed on the ground surface 1 that has been leveled, and the upper surface of the level concrete 2 is used for base concrete. Concrete is cast using a mold (not shown) to form a base concrete 3, and the level concrete 2 and the base concrete 3 support the rising portion 5 shown in FIGS. 2 and 3. The lower part of the anchor bolt 4 is buried, and the tip part 4A is erected so as to extend in the vertical direction.

After the base concrete 3 is hardened, the upper surface of the base concrete 3 is used to form the frame materials 6 and 6 for the rising portion 5 (see FIG. 4). Established).

Next, the concrete is placed in the mold materials 6 and 6 for the rising portion 5 to a height equal to or higher than a desired rising portion top end level H, and then the rising portion mold is formed from above the rising portion top end surface 5A. The concrete in the frame members 6 and 6 is pressurized to extract water and air mixed in the concrete in the part.

This pressurizing operation is stopped when the top end surface 5A reaches a predetermined level. By this work, it is possible to simultaneously achieve the leveling of the rising edge top end surface 5A of the foundation and the high density of the foundation, simplify the construction process, and greatly reduce the construction cost and the number of construction days.

In addition, when the said base concrete 3 hardens | cures, when the said standing part formwork materials 6 and 6 are erected in the approximate center part of the base concrete 3, as shown in FIG. Shaped fabric foundation can be produced.

Further, after the base concrete 3 is hardened, when the rising portion formwork materials 6 and 6 are erected at either one end portion of the base concrete 3, as shown in FIG. A substantially L-shaped solid foundation can be generated.

By the way, in the first embodiment, the lowering that blocks the applied pressure from acting on the inner side surfaces of the rising portion formwork materials 6 and 6 below the height position of the rising portion top end surface 5A. By mounting the required number of stoppers 6A, which are restrictors, so as to be insertable / removable, the leveling of the rising end top end surface 5A of the foundation can be performed with high accuracy. Of course, in the present invention, instead of the stopper 6A, a lowering restricting body can be constituted by a nut 6N screwed into an upper end portion of the anchor bolt 4 described later. In this case, the seat body 16 to be described later can be loosely fitted to the upper end portion 4A of the anchor bolt 4 so that the nut 6N can be screwed and locked at a predetermined height position of the anchor bolt 4. The lowering below the set height of the seat body 16 that is lowered by the pressure can be restricted by the nut 6N, and the configuration can be further simplified.

Further, when performing the foundation construction method according to the first embodiment, a pressurizing device that pressurizes the concrete in the rising portion frame members 6 and 6 from above the rising portion top end face 5A has a known configuration. Although a screw-type jack device and a fluid pressure-type jack device can be used, in this Example 1, the pressurizing device 10 shown in FIG. 4 was used.

That is, the pressurizing device 10 used in the first embodiment includes a support member 11 constructed in a gate shape, and a bolt rod 13 which is a weight holding means suspended from a lower portion of the ceiling portion 12 of the support member 11. A weight 15 mounted so as to be movable up and down via a nut 14 screwed onto the bolt rod 13, and a lower surface of the weight 15 mounted on the top end surface 5A of the rising portion 5. A pressure leg 17 in contact with the seat 16 and the weight 15 is caused to act on the seat 16 via the pressure leg 17 so as to rise up. Water and air mixed in the concrete in the part mold materials 6 and 6 can be forcibly extracted by the pressurizing action.

In this case, the seat body 16 is formed in a shape in which a gap S is formed between the outer peripheral end portion and the rising portion mold materials 6, 6. Excess water is drained from the gap S while pushing out air, improving the concrete density, preventing cracks after drying, and eliminating the need for repair work and maintenance costs after completion of construction. Can do.

Of course, when considering drainage performance, the seat 16 is not particularly illustrated, but can be formed by penetrating many drain holes or a porous material.

  In addition, since the process which is not demonstrated in particular in the said Example 1 is the same as the conventional cloth foundation construction or solid foundation construction, the detailed description is abbreviate | omitted here.

It is explanatory drawing which shows the production | generation process of the basic | foundation base concrete which concerns on Example 1 of this invention. It is explanatory drawing which shows the process of manufacturing a fabric foundation with the foundation which concerns on this Example 1. FIG. It is explanatory drawing which shows the process of manufacturing a solid foundation with the foundation which concerns on this Example 1. FIG. It is explanatory drawing which shows the example of an arrangement | positioning state of the pressurization apparatus used in this Example 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground surface 2 Level concrete 3 Base concrete 4 Anchor bolt 5 Standing part 5A Top end surface 6,6 Form material 6A for rising part Stopper (Descent | fall restriction body)
6N nut (lowering regulator)
DESCRIPTION OF SYMBOLS 10 Pressurizer 11 Support member 12 Ceiling part 13 of support member Bolt rod (weight holding member)
14 Nut 15 Weight 16 Seat 17 Pressure leg

Claims (1)

Level concrete is placed on the leveled ground surface, and concrete is placed on the upper surface of the level concrete using a base concrete formwork, and anchor bolts for supporting the rising portion are provided on the base concrete. After the base concrete is hardened after burying the lower part and extending the tip part in the vertical direction, the formwork for the rising part is erected using the base concrete surface, and then the rising part a mold frame for use, desired after Da設concrete until the rising portion crest level or height, and pressure of the concrete in the rising portion formwork from top end face upwardly above the rising section, the pressurizing pressure device The support member is constructed in a gate shape, the weight holding means suspended from the lower part of the ceiling of the support member, and attached to the weight holding means so as to be movable up and down. And a pressurizing body that is disposed on the lower surface of the weight and has a lower end portion that contacts a seat disposed on the top end surface of the rising portion. It is configured to act on the seat body via a pressurizing body, and water and air mixed in the concrete in the rising part formwork are extracted by the pressurizing device, and the top end surface reaches a predetermined level. A foundation construction method characterized in that the pressurizing operation is stopped at the time.

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