JP3408629B2 - Precast concrete foundation structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic structure constructed on the ground of a building, and more particularly to a precast concrete (hereinafter referred to as PC) basic structure that greatly simplifies work at a construction site.

[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 on the ground in a stable and appropriate manner. Conventionally, the foundation part for a house first forms a root cutting part by continuously excavating the ground of the building construction part, laying gravel on this root cutting part to assemble a formwork, and form this mold through a supporting means. It was constructed by standing and supporting the frame, and then pouring concrete into this form, curing and solidifying it, and then removing the form and mortaring the surface.

However, in the above-mentioned conventional foundation construction work, the work of continuously erecting the formwork along the root cutting part is
It was time consuming and led to a longer construction period and increased costs. Also, the work of curing the concrete requires several days, which is a cause of prolonging the construction period, and further, the removal of the formwork and the mortar treatment are labor-intensive works.

Therefore, in order to further simplify and speed up the work for constructing the foundation at the construction site, a construction method is considered in which a precast concrete (hereinafter referred to as PC) foundation manufactured in advance at the factory stage is installed in the root cutting portion. It was

Furthermore, there has been a demand for a form that maximizes the work at the construction site by this PC foundation.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a PC foundation structure that can most simplify the work at a construction site for building footing.

[0007]

In order to achieve the above object, the invention according to claim 1 has a cloth foundation for continuously supporting a building body, an inner foundation floor on the inside of the entrance and exit, and an outside foundation on the outside of the entrance and exit.
In the foundation structure consisting of the outer foundation floor , the cloth foundation,
On a plurality of precast concrete bottom plates installed at predetermined intervals in the root cutting part, a precast concrete foundation having a rising part supporting the building and a footing part projecting laterally from the lower part of the rising part is erected. The precast concrete foundation includes a support portion protruding from the rising portion, the precast concrete foundation having the support portion is used in the formation region of the inner foundation floor, and the inner foundation floor is The precast concrete foundation is supported by the precast concrete inner foundation slab on the supporting portion of the precast concrete foundation, the joint between the precast concrete foundations, and the concrete is placed between the lower end of the precast concrete foundation and the ground. Built with the outer foundation floor, the footing
Installed on the ground at a position facing the foot and this footing
Between precast concrete outer foundation floor base
, Erected a precast concrete support member, and
Precast concrete support member for precast concrete
Characterized by being supported by a cleat outside foundation slab
And

[0008]

The invention according to claim 2 is based on claim 1.
Serial and precast concrete foundation structure mounting, the floor supporting foundation for supporting the floor, in a basic structure composed of, the floor supporting foundation, a pass can be precast concrete support base over the floor beams, on the footing portion It is characterized in that it is placed or integrally provided on the footing portion.

Further, the invention according to claim 3 is the same as claim 1.
Or a precast concrete foundation structure according to claim 2, and independent foundation provided in a single under the pillars, the basic structure consisting of the independent foundation, established a precast concrete independent foundation into position configuration It is characterized by being done.

Further, the invention according to claim 4 is a foundation structure comprising the precast concrete foundation structure according to any one of claims 1 to 3 and an equipment foundation floor on which equipment is installed. The foundation floor is characterized in that the precast concrete equipment foundation floor slab is installed on the precast concrete equipment foundation floor base installed in the installation area of the equipment.

The invention according to claim 5 is the same as claim 4
In the described precast concrete foundation structure, the equipment foundation floor is characterized in that the precast concrete equipment foundation floor bottom plate is omitted and a precast concrete equipment foundation floor slab is installed on the footing portion.

[0013]

According to the present invention, all the members constituting the foundation are P
As a product made of C, concrete is to be placed at the joint between the PC foundations and between the lower end of the PC foundation and the ground at the construction site. Therefore, the concrete placing work at the construction site is significantly reduced, and the work can be simplified to the maximum extent.

Here, the cloth foundation is constructed by laying the PC foundation between the PC bottom boards, and the inner foundation floor is constituted by supporting the PC inner foundation floor slab on the support portion formed at the upper portion of the PC foundation. To be done.

The outer foundation floor is constructed by installing a PC support member between the footing portion of the PC foundation and the PC outer foundation floor base plate, and supporting the PC outer foundation floor slab on this PC support member. It

Further, since the floor support foundation is composed of the PC support base on which the floor beams can be bridged, the floor can be supported by mounting the floor beams on the PC support base. The independent foundation is also made of PC and is simply configured to be installed at a predetermined position.

Further, the equipment foundation floor is constructed by installing a PC equipment foundation floor slab on a PC equipment foundation floor bottom plate. Alternatively, the PC equipment foundation floor base plate may be omitted and the PC equipment foundation floor slab may be installed on the footing portion of the PC foundation.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a cloth foundation that continuously supports the building frame, an outer foundation floor outside the entrance, an inner foundation floor inside the entrance, a floor support foundation that supports the floor, and facilities such as a bathroom unit are installed. The present invention is applied to a basic structure consisting of an equipment foundation floor. Then, these foundations are made into PCs, and the concrete pouring work at the construction site is greatly simplified.

FIG. 1 is a perspective view showing a cloth foundation and an outer foundation floor in the embodiment. In the figure, PC cloth foundation 10
However, the cloth foundation is constructed by being installed between the PC bottom plates 30 installed in the root cutting part 20.

The root cutting portion 20 is formed by digging the ground 100, and the PC bottom board 30 is installed at a corner portion and a predetermined position of the root cutting portion 20.

Since this PC bottom plate 30 is a reinforced concrete plate having reinforcing reinforcing bars (not shown) inside, the work of disposing the reinforcing reinforcing bars on this PC bottom plate 30 can be omitted at the construction site. . Further, the PC bottom plate 30 has a smooth upper surface, and when the PC cloth foundation 10 is erected, marking can be performed on the upper surface for alignment.

Then, the PC bottom plate 30 is attached to the root cutting portion 20.
At the time of installation, the mortar 22 is installed at the installation position of the PC bottom plate 30, and the PC bottom plate 30 is placed on the mortar 22. Then, the PC bottom board 30 is hit with a hanging arrow or the like to perform an adjusting operation so that the upper surface is substantially horizontal at a predetermined height. This work is performed while checking the horizontal level and height using a water thread, a level, or a leveling device using a laser beam.

Next, the PC cloth foundation 10 installed between the PC bottom plates 30 thus installed will be described.
There are two types of cloth bases 10, a PC cloth base 12 (right side in FIG. 1) having recesses 11 formed at both ends, and a recess 11 formed at one end and a protrusion 13 at the other end. There is the formed PC cloth foundation 14 (left side in FIG. 1). Each of the PC cloth foundations 12 and 14 has a rising portion 16 and a footing portion 18.

Taking the PC cloth foundation 12 as an example,
The upright portion 16 stands upright in the vertical direction and supports the building by placing it on the upper end surface, and is formed in a rectangular parallelepiped shape with a predetermined thickness. And a recess 11 having a U-shaped cross section is formed at both ends. And PC
When the cloth foundations 12 are joined to each other in a straight line, the recesses 11 are installed so as to face each other, and the reinforcing bars are arranged inside the recesses 11 to pour concrete to strengthen the connecting portion. ing. Further, as shown in FIG. 1, the rising portion 16 has a notch 16a formed at a position forming a front door.

A support portion 52 projects from the rising portion 16 in the area where the inner foundation floor is provided (see FIG. 2).
However, this explanation will be given later together with the explanation regarding the inner foundation floor.

The footing portion 18 supports the rising portion 16 so as to stand upright, and is formed on both side surfaces of the rising portion 16 so as to have a reinforcing bar (not shown) inside and to project laterally at a right angle from the lower end. Then, the top surface becomes horizontal when installed.
Furthermore, the upper surface is a smooth surface. The footing portion 18 is formed at the center of the rising portion 16, and the footing portion 18 is formed on the side surface of the recess 11.
Is not formed. Therefore, as shown in FIG. 1, the PC cloth foundation 12 can be placed on the PC bottom plate with the lower end surface of the recess 11 as the erection portion. Then, the footing portion 18 is provided with a gap at a predetermined interval between itself and the ground of the root cutting portion 20, and concrete can be poured into this gap.

A concrete filling port 19 is formed in the footing portion 18. The concrete filling port 19 is a plurality of rectangular holes penetrating from the upper surface to the lower surface of the footing portion 18, and concrete is poured from the concrete filling port 19 to cure and solidify the footing portion 18 to the ground 100. It can be firmly fixed to.

Next, the PC cloth foundation 14 is different from the PC cloth foundation 12 in that it has a projection 13 at one end.

The convex portion 13 is a corner portion of the foundation.
Since it is joined at a right angle to the PC cloth foundation 12, the rising portion 16
It is formed so as to project at a right angle to the axis at one end of the. Then, a reinforcing bar (not shown) projects from the front end surface of the convex portion 13, and the PC cloth foundation 12 to which the reinforcing bar is joined is joined.
It is possible to firmly bond the PC cloth foundation 12 and the PC cloth foundation 14 when the PC cloth foundation 12 and the PC cloth foundation 14 are inserted into the concave section 11 of FIG.

Further, the footing portion 18 is not formed at the end portion where the convex portion 13 is formed, and the footing portion 18 is formed.
Is formed in the central portion of the rising portion 16.
Other configurations are the same as those of the PC cloth foundation 12.

The PC cloth foundation 12 and the PC cloth foundation 1
In No. 4, the surface is preliminarily processed in the factory.

These PC cloth foundations 10 are made of PC
The installation position is marked on the upper surface of the bottom plate 30 to align the positions, and the PC bottom plate 30 is bridged and installed. This P
Since the footing portion 18 is integrally formed on the C cloth foundation 10, it is not necessary to construct the footing at the construction site.

Thus, as shown in FIG. 1, the PC cloth foundation 1
When 0 is installed and fixed, next, the outer foundation floor provided in the entrance porch of the building is constructed by the members made of PC. As shown in FIG. 1, this outer foundation floor is composed of a PC bottom plate 32, PC support plates 42 and 44, and a PC floor slab 46.

The bottom surface of the PC bottom plate 32 has a footing portion 1
The PC support plates 42 and 44 are placed and supported at the same height as the upper surface of the PC 8. And this PC bottom board 32 is
Although it is like miniaturizing the above-mentioned PC bottom board 30,
Since it does not support a heavy load such as the C bottom plate 30, no reinforcing bar may be provided inside.

The PC support plate 42 is bridged between the PC bottom plate 32 and the footing portion 18 in an upright state. In addition, the PC support plate 44 is bridged in a state of standing between the PC bottom plates 32, 32, and is connected to the tip ends of the PC support plates 42, 42. And the connected PC
The support plates 42 and 44 can be fixed by bolts and inserts (not shown). The PC support plate 4
2, 44 may be integrally manufactured in advance.

The PC support plates 42 and 44 are provided with cut grooves 42a and 44a at their upper ends, and the PC floor slab 46 can be placed in the cut grooves 42a and 44a. Then, the PC support plates 42 and 44 and the PC floor slab 46 can be fixed to each other by a known fastening jig such as a bolt and an insert (not shown).

The PC floor slab 46 is a plate made of PC, the upper surface of which constitutes the floor surface of the outer foundation floor. Therefore, for example, if a surface treatment is performed in advance by applying mortar or affixing tiles to this surface, the work at the construction site can be simplified.

To construct the outer foundation floor, the PC bottom board 32 is installed at a position facing the footing portion 18 of the PC cloth foundation 10 installed as described above. Here, the top surface of the PC bottom plate 32 is the footing portion 18
The same height as the top surface of. And footing section 18
PC support plate 42 is placed between the PC bottom plate 32 and the PC bottom plate 32, and a PC support plate 44 is placed between the PC bottom plates 32 and 32 to fix the PC support plates 42 and 44. ,
Further, by placing and fixing the PC floor slab 46 on these, the outer foundation floor is completed. The PC support plates 42, 44 and P
When there is a gap at each joint of the C floor slab 46, it is preferable to fill the gap with concrete.

Next, the inner foundation floor will be described. Figure 2
FIG. 3 is a cross-sectional view of an inner foundation floor in an example. The inner foundation floor is the entrance floor floor, and is constructed on the inner side of the building of the outer foundation floor in FIG.

In FIG. 2, the inner foundation floor is constructed by supporting a PC floor slab 56 on a support portion 52 projecting from the rising portion 16 of the PC cloth foundation 10.

The support portion 52 is a bracket-like portion that is integrally formed with the rising portion 16 by being reinforced by the reinforcing bars provided inside, and the upper surface serves as a mounting surface for the PC floor slab 56 and is inserted. (Not shown) is buried.

The PC floor slab 56 is a PC plate having reinforcing reinforcing bars inside, and has bolt insertion holes formed at its ends. Therefore, the PC floor slab 56 can be fixed to the support portion 52 by inserting the bolt 58 and screwing the bolt 58 into the insert. In addition, as shown in FIG. 2, a cut groove is formed in the area where the bolt insertion hole is formed, so that the head of the inserted bolt does not project.

In this way, since the inner foundation floor is constructed by the members made of PC and concrete pouring is unnecessary, the work at the construction site can be greatly simplified.

Next, the floor support foundation will be described. The skeleton of the building is supported by the above-mentioned cloth foundation, but in order to prevent the floor on the first floor from bending, a floor support foundation such as a bundle foundation is provided between the cloth foundations. May be provided. Therefore, in this embodiment, the floor support foundation is also a PC.
It was decided to use the manufacturing base.

FIG. 3 is a perspective view showing the floor support foundation in this embodiment. As shown in the figure, the floor support foundation is P
A PC support base 60 is placed on the footing portion 18 of the C cloth foundation 10.

The PC support base 60 is provided with a floor beam 64 for supporting a floor (not shown). Specifically, the pair of floor cloth beams 64 are installed so as to be opposed to each other on the footing portions 18 of the PC cloth foundations 10 that face each other.

The PC support base 60 is also made of PC and forms a rectangular parallelepiped block, and the thickness thereof does not exceed the protruding length of the footing portion 18. And the PC support 60
Since the lower end surface of is a smooth surface, it can be stably placed on the upper end surface of the footing portion 18.

A mounting bolt 62 is provided on the upper end surface of the PC support base 60 so that it can be easily mounted and fixed to the floor beam 64. That is, in the floor beam 64,
As shown in FIG. 3, a mounting plate 66 is provided at the end, and the mounting bolts 62 are inserted into the mounting holes 66 a formed in the mounting plate 66.
The floor beam 64 by inserting it through and fixing it with the nut 68.
Can be attached and fixed to the PC support base 60.

Instead of the mounting bolt 62, an insert having a female screw is formed on the upper end surface of the PC support base 60, and the floor beam 64 is mounted and fixed by screwing the bolt. Good.

Further, the support base may have a notch formed in the upper portion thereof, and the floor beam may be fitted in the notch to be attached. With such a configuration, the mounting bolts 42 of the PC support base 60 shown in FIG. 3 can be omitted, which facilitates manufacturing.

Alternatively, the PC support base may be manufactured in advance by being integrated with the PC base. Alternatively, a notch may be formed in the upper end of the rising portion of the PC foundation, and the floor beam may be fitted into the notch to be attached, so that the rising portion itself serves as a PC support.

Next, although the floor beam 64 may be made of wood, it is preferable to use a steel material such as H-section steel in view of the recent price increase of wood. In addition, the steel material has an advantage that it does not require a termite-proof treatment.

In this way, if the floor beam 64 is attached and fixed to the PC support base 60 installed on the footing portion 18, the floor beam 64 can support the floor, so that a bundle foundation or an independent foundation is omitted. You can

Then, when concrete is poured into the concrete filling port 19 of the footing portion 18, the lower end portion of the PC support base 60 is also fixed with concrete.

When the PC cloth foundation 10 is laid on the PC bottom board 30, a gap is formed between the ground 100 and the footing portion 18. Therefore, when concrete is poured, the concrete that has entered through this gap is the concrete. It is possible to reliably fill the concrete by confirming that the filling port 19 is filled from below and overflows from the upper end portion. Compared with the work of constructing the entire footing, this work requires a small amount of concrete to be placed, so that the curing period is short and the concrete placing and curing work can be simplified. Then, when concrete is poured into the concrete filling port 19, cured and solidified, the footing portion 1
8 can be firmly fixed to the ground 100.

Next, the equipment foundation floor will be described. This equipment foundation floor is a foundation floor constructed to install equipment such as a bathroom unit, for example. And in FIG.
It is a longitudinal section showing an equipment foundation floor concerning an example. As shown in the figure, the equipment foundation floor is the PC floor plate 34 and the PC floor plate 7
It is configured by setting 0.

The PC floor slab 70 is a plate made of PC and has an opening 72 for concrete pouring or piping.

Specifically, the PC floor slab 70 is a PC cloth foundation 1
It is assumed to be a substantially square shape corresponding to the shape surrounded by 0,
The dimension is formed to be slightly smaller than the area surrounded by the PC cloth foundation 10. Then, as shown in FIG. 4, a slight gap 74 is formed between the inner side surface of the rising portion 16 of the PC cloth foundation 10 and the outer end surface of the PC floor slab 70. The PC floor slab 70 also has a reinforcing bar (not shown) arranged therein and has sufficient strength.

The openings 72 are formed at four positions, for example, at positions other than the positions where the PC bottom plate 34 is provided. In addition, when the opening 72 is used for placing concrete, the opening 72 is set to a size that takes into account the hose diameter of the pump car, and the position where the placed concrete can go around is considered. Has been set. Alternatively, when this opening 72 is used for piping, it will be formed at a position corresponding to the rising portion of the piping (not shown). The opening 72 for the pipe may be formed only at one place, but when a plurality of pipes are provided, a size corresponding to the plurality of pipes or a size that allows the plurality of pipes to be inserted all at once. It is also possible to set to.

Then, such a PC floor slab 70 is placed on the PC bottom plate 34 arranged on the ground surrounded by the PC cloth foundation 10, and concrete is poured from the opening 72 for concrete pouring. Then, by fixing the PC floor slab 70 and the PC bottom plate 34, a facility foundation floor is constructed. With such a configuration, the PC floor slab 70 can be used as a discard formwork during concrete pouring, and other work can be performed on the PC floor slab 70 without waiting for the curing period of the pouring concrete. It is possible to continue.

Further, the PC floor slab 70 is connected to the PC through the gap 74.
By placing concrete on the footing portion 18 of the cloth foundation 10, the concrete is fixed to the PC cloth foundation 10.

Alternatively, as shown in FIG. 5, the PC bottom board 34 may be omitted from the equipment foundation floor of FIG. In the figure, the PC floor slab 80 is laid over the footing portion 18 of the PC cloth foundation 10. By doing so, the PC floor slab 80 can be supported by the footing portion 18, the PC bottom plate 34 can be omitted, and since the PC floor slab 80 and the PC bottom plate are not fixed with concrete, It is not necessary to form an opening for placing concrete in the PC floor slab 80. Then, if concrete is placed in the gap 84 formed between the peripheral end surface of the PC floor slab 80 and the PC cloth foundation 10, the PC floor slab 80 will be fixed to the PC cloth foundation 10.

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

For example, in the above-mentioned embodiment, the present invention is applied to the foundation structure consisting of the cloth foundation, the inner foundation floor, the outer foundation floor, the floor support foundation, and the equipment foundation floor. The present invention can be applied to a basic structure. In this case, the independent foundation is made of PC, installed at the root cutting portion formed in the ground, and concrete is placed only between the ground and the ground to construct the independent foundation. By doing so, the concrete pouring work at the construction site can be greatly simplified, as in the above embodiment.

Alternatively, even if the foundation structure is of a type in which at least one of the outer foundation floor, the floor support foundation, or the equipment foundation floor is removed from the above-mentioned embodiment, the member constituting the foundation by applying the present invention is By using all PCs, it is possible to greatly simplify the concrete pouring work at the construction site.

In the above embodiment, the PC cloth foundation 1 is used.
If the concrete is placed only between the 0 joints and between the bottom end of the PC cloth foundation 10 and the ground 100, the work at the construction site can be simplified to the maximum extent.

Alternatively, as shown in FIG. 6, a concave groove 92 is formed in the upper portion of the support 90, and an anchor streak or anchor bolt 96 is provided at the end of the floor beam 94, and the concave groove 92 is formed in the concave groove 92. The anchor bolts 96 may be arranged in a state of being inserted, and concrete may be poured to fix them.

[0068]

As described above, according to the present invention,
Since all the members constituting the foundation are made of PC, it is possible to greatly reduce the concrete placing work at the construction site and simplify the work.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cloth foundation and an outer foundation floor in an embodiment.

FIG. 2 is a vertical cross-sectional view showing an inner foundation floor in the example.

FIG. 3 is a perspective view showing a floor support foundation in the embodiment.

FIG. 4 is a vertical cross-sectional view showing an equipment foundation floor in the example.

5 is a vertical cross-sectional view showing a modified example of the equipment foundation floor of FIG.

FIG. 6 is a perspective view showing a modified example of the embodiment.

[Explanation of symbols]

10 PC cloth foundation (PC foundation) 16 Rise 18 footing section 20 Root cutting part 30 PC bottom board 32 PC floor (outside floor of PC floor) 34 PC floor (PC equipment basic floor floor) 42 PC support plate (PC support member) 44 PC support plate (PC support member) 46 PC floor slab (outside base slab for PC) 52 Support 60 PC support 70 PC floor slab (PC equipment floor slab) 100 ground

Claims (5)

(57) [Claims] 1. A foundation structure comprising a cloth foundation for continuously supporting a building frame, an inner foundation floor inside a doorway, and an outer foundation floor outside a doorway , wherein the cloth foundation is root cutting. Consists of a precast concrete foundation that has a rising part that supports the building and a footing part that projects laterally from the lower part of this rising part on a plurality of precast concrete bottom plates installed at predetermined intervals The precast concrete foundation includes a projecting support portion from the rising portion, in the formation region of the inner foundation floor, a precast concrete foundation having this support portion is used, the inner foundation floor, the The precast concrete foundation foundation slab is supported on the support portion of the precast concrete foundation, and the precast concrete foundations are joined together. Parts, and the built in Da設concrete between the lower end portion and the ground of the precast concrete foundation, the outer baseplate, the Phu Thinh said footing portion
Precast installed on the ground at a position facing the
Precast concrete is placed between the concrete outer foundation floor base and
Install the cleat support members and install the precast concrete
Precast concrete outer foundation floor slabs
A precast cast that is characterized by being supported
Ncrete foundation structure. 2. A precast concrete foundation structure according to claim 1 Symbol mounting, the floor supporting foundation for supporting the floor, in a basic structure composed of, the floor supporting foundation, a pass can be precast concrete support base over the floor beams A precast concrete foundation structure, which is placed on the footing portion or integrally provided on the footing portion. 3. A precast concrete foundation structure according to claim 1 or 2 , and an independent foundation provided under a column, wherein the independent foundation is a precast concrete independent foundation. A precast concrete foundation structure characterized by being installed at a predetermined position. 4. A foundation structure comprising a precast concrete foundation structure according to any one of claims 1 to 3 and an equipment foundation floor for installing equipment, wherein the equipment foundation floor is the installation of the equipment. A precast concrete foundation structure comprising a precast concrete equipment foundation floor slab installed on a precast concrete equipment foundation floor slab installed in an area. 5. The precast concrete foundation structure according to claim 4 , wherein the equipment foundation floor is constructed by omitting the precast concrete equipment foundation floor base and installing a precast concrete equipment foundation floor slab on the footing portion. Precast concrete foundation structure characterized by