JPH07197475A - Structure of foundation - Google Patents

Abstract

PURPOSE:To shorten a construction period, by a method wherein concrete for connecting slabs is placed in spaces between a plurality of precast concrete slabs plate-shaped and hollow-shaped, which are laid leaving the spaces. CONSTITUTION:A plurality of precast concrete slabs 10 are laid inside a PC- frame 20 in checker shape, leaving definite spaces 24 between the slabs 10 and between the PC-frame 20 placed on an excavated part and the slabs 10. After that, splice bars 30 are arranged in the spaces 24 formed inside the PC- frame 20 lengthwise and crosswise, following which concrete 40 is placed in the spaces 24 and is cured, and the slabs 10 and the PC-frame 20 are fixed to the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation structure formed on the entire surface of a building construction area on the ground of a building, and more particularly to a foundation structure having a plurality of precast concrete slabs laid on the entire surface of a building construction portion.

[0002]

2. Description of the Related Art In order to construct a building in a stable state, it is first necessary to construct a foundation portion on the ground in a stable and appropriate manner. Conventionally, the foundation portion formed on the entire surface of the building construction area for a house has been constructed as follows.

That is, first, a root cutting portion is formed by total excavation in a building construction portion, and pebbles are laid on the root cutting portion,
A form is assembled, and this form is erected and supported along the root cutting portion via a supporting means. Then, concrete is poured into the mold and cured and solidified, then the mold is removed and a finishing mortar is provided on the surface, and it is again cured and solidified. In this way the foundation consisting of concrete floors was constructed.

[0004]

However, the above-mentioned conventional foundation construction work involves many work steps and is troublesome, and thus leads to a longer construction period. Also, the work of curing concrete and mortar requires several days, which is a cause of prolonging the construction period, and the work of removing the formwork and finishing the mortar was troublesome.

The present invention has been made in view of the above problems, and an object thereof is to provide a foundation structure capable of simplifying and speeding up the work of constructing a foundation at a construction site and shortening the construction period. To do.

[0006]

In order to achieve the above object, a first aspect of the present invention is to lay a foundation structure formed on the entire surface of a building construction area of the ground, with a slight gap between each other on the entire surface of the building construction area. It is characterized by comprising a plurality of plate-shaped hollow precast concrete slabs and concrete for connecting the precast concrete slabs, which is placed in the gaps of the precast concrete slabs.

A second aspect of the present invention is characterized in that the precast concrete slab has reinforcing rebars embedded along the periphery thereof, and reinforcing rebars are provided in the gaps.

A third aspect of the invention is characterized in that the precast concrete slab is arranged in a precast concrete frame.

A fourth aspect of the invention is characterized in that the outer surface of the precast concrete frame is pre-patterned.

[0010]

According to the invention described in claim 1, for example, the ground is excavated over the entire area of the building construction area to form a root cutting portion, and the precast concrete slabs are provided with predetermined gaps over the entire area of the building construction area. Laying, placing concrete in this gap, connecting the precast concrete slabs, curing and solidifying, the foundation can be constructed,
Compared with the conventional example, concrete pouring and curing work at the construction site can be simplified.

Since it is only the gaps that need to be poured into the concrete and not the entire surface, the work can be continued during the curing period.

Since the foundation is made of precast concrete that can be manufactured in a factory in advance, the surface is in a finished state, so that mortar treatment at a construction site can be omitted.

The precast concrete slab is hollowed out in a plate shape to reduce its weight.

According to the second aspect of the present invention, the reinforcing bars and concrete embedded between the precast concrete slabs sandwiching the gap, and the joint bar arranged in the gap,
Beams are formed with concrete placed in the gaps, and the foundation structure can be reinforced and made stronger.

According to the third aspect of the present invention, it is not necessary to assemble a form at the time of placing concrete, and it is preferable in appearance.

According to the invention of claim 4, the precast concrete frame has a pattern on the outer surface thereof,
It is more preferable in appearance.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall perspective view of the basic structure according to this embodiment, and FIG. 2 is a sectional view of the basic structure according to this embodiment.

In FIG. 1, a precast concrete (hereinafter referred to as PC) slab 10 preliminarily manufactured at a factory stage is laid in a PC frame 20 installed in a root cutting portion 50.

The root cutting portion 50 is formed by digging the ground 60, and the PC frame 20 extends along the inner wall of the root cutting portion 50 so that the upper portion of the PC frame 20 projects from the upper end portion of the root cutting portion 50. Have been installed.

The PC frame 20 is a reinforcing bar (not shown).
It is a reinforced concrete frame having the inside of the structure, and the outer surface of the frame has a pattern, which is preferable in appearance after the building is constructed.

Next, the PC slab 10 laid in the installed PC frame 20 will be described.

As shown in FIG. 2, the PC slab 10 has a vertical cross section composed of a top plate 12 having a predetermined thickness and two leg portions 14 hanging from both ends to support the top plate 12. It is integrally formed to have a predetermined size so as to have a substantially U-shape, and is constructed of concrete with reinforcing rebars (not shown) embedded along the periphery inside.

The inner wall of the leg portion 14 is inclined from the middle toward the center side of the top plate 12.

By configuring the PC slab 10 as described above, the weight of the PC slab 10 can be reduced, and the workability of transportation and work can be improved.

The surfaces of the PC slab 10 and the PC frame 20 are both finished in advance in the factory.

The plurality of PC slabs 10 are laid in the PC frame 20 in a checkerboard pattern with predetermined gaps 24 between the PC slabs 10 and between the PC frame 20 and the PC slab 10.

A gap 24 vertically and horizontally formed in the PC frame 30
The joint muscle 30 is arranged in the.

The joint bars 30 are used to reinforce the basic structure. As shown in part in FIG. 3, the reinforcing bars 32 are arranged vertically and horizontally in the upper and lower parts of the gap 24, respectively.
34, and reinforcing bars 36 arranged in the height direction of the gap joining them.

Then, the concrete 40 is poured into the gap 24, cured and hardened to fix the PC slab 10 and the PC frame 20 to the ground 60, and the foundation structure is completed.

Compared with the work of constructing a concrete floor in the whole root cutting part 50, this work can simplify the concrete pouring and curing work, and since only the gaps need to be poured concrete, the curing work is not performed during the curing period. Can continue to work.

Further, the leg portions 14 and 14 in which the reinforcing bars of the PC slabs 10 and 10 interposing the gap are embedded, the joint bar 30 arranged in the gap 24, and the concrete 40 cast in the gap 24. Beams are formed in and the foundation structure is reinforced.

The present invention is not limited to the above embodiments, but various modifications can be made within the scope of the invention.

For example, the shape of the PC slab 10 is the building 1
As long as it has the strength to bear the floor load, can be reduced in weight, and has a flat upper surface, the shape is not limited to the U-shape, but other shapes can be adopted.

When, for example, a large opening is constructed by the building to be constructed and reinforcement of the foundation is required, a reinforcing bar for reinforcement can be appropriately added to the gap.

In the present embodiment, the case where the foundation is constructed in the root cutting portion formed by the total excavation has been described. However, when the foundation is built all over the building construction area of the ground and the foundation is constructed on it. But it's okay.

[0037]

As described above, according to the invention described in claim 1, from the PC slab which can be manufactured in the factory in advance and which is laid on the entire surface of the building construction portion, and the concrete which is cast in the gap is used. Since it has a basic structure, there is an effect that concrete pouring and curing work at the construction site can be simplified and the construction period can be shortened.

In addition, a floor member such as a floor panel is not required,
It is possible to mount the exterior material as it is and use it as a floor.

According to the second aspect of the present invention, the reinforcing bars and concrete embedded between the precast concrete slabs sandwiching the gap, and the joint bar arranged in the gap,
Beams are formed with concrete cast in the gaps, and the support of the foundation structure is reinforced, the strength is further increased, and the entire foundation structure is integrated.

According to the third aspect of the present invention, there is an effect that it is not necessary to assemble a formwork, the site work can be simplified, and the appearance is preferable.

[Brief description of drawings]

FIG. 1 is a perspective view showing a basic structure according to the present embodiment.

FIG. 2 is a partial cross-sectional view showing a basic structure according to the present embodiment.

FIG. 3 is a perspective view showing a part of the joint muscle.

[Explanation of symbols]

 10 PC slab 12 Top plate 14 Leg 20 PC frame 24 Gap 30 Joining bar 40 Concrete 50 Root cutting 60 Ground

Claims (4)

[Claims] 1. A foundation structure formed on the entire ground building construction area, wherein a plurality of plate-shaped hollow precast concrete slabs are laid on the entire building construction area with a slight gap therebetween, and the precast concrete slab. And a concrete for connecting a precast concrete slab that is placed in the gap between the base structure. 2. The precast concrete slab according to claim 1, wherein reinforcing reinforcing bars are embedded along the periphery of the precast concrete slab, and reinforcing reinforcing reinforcing bars are disposed in the gaps. Foundation structure. 3. The foundation structure according to claim 1 or 2, wherein the precast concrete slab is arranged in a precast concrete frame. 4. The foundation structure according to claim 3, wherein a pattern is preliminarily applied to the outer surface of the precast concrete frame.