JP2947328B2 - Construction method of 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 precast concrete foundation structure in which concrete is cast at a joint between precast concrete foundations to form a joint foundation.
It relates to the construction method .

[0002]

2. Description of the Related Art Conventionally, precast concrete foundation 1
When connecting the precast concrete foundations 1, the end faces of adjacent precast concrete foundations 1 are opposed to each other with a space therebetween, a formwork is assembled on both sides of this part, concrete is poured, and after the concrete is hardened, the formworks on both sides are removed. As shown in FIG. 8, the connecting base 2 was formed. The precast concrete foundation 1 is connected in this way, but some foundations require decorative finishing on the surface. In this case, the precast concrete foundation 1 can be finished with a decorative finish on the surface at the factory, but the pattern of the foundation can be finished. However, the outer surface of the connection foundation 2 made of cast-in-place concrete is cast in place. The concrete surface was exposed as it was, which was not preferable in appearance.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a mold for the surface of a connecting foundation between precast concrete foundations. It can be done with a board, and it can also serve as the role of the formwork for concrete casting and the role of makeup for the connection base, and the backside formwork of both forms can be reused.
An object of the present invention is to provide a method for constructing a precast concrete foundation structure .

[0004]

In order to achieve the above object, a method of constructing a precast concrete foundation structure according to the present invention comprises providing a template on both front and back sides of a connecting portion between precast concrete foundations 1 to form a structure between the two formwork. To form a connecting base by casting concrete on the front side of the formwork on both sides, legs 4 having a projecting length shorter than the thickness of the connecting base are protrudingly provided on the back surface of the front side formwork. Concrete is poured between the templates, and after the concrete has hardened, only the template on the back side is removed, leaving only the template on the front surface on which the legs 4 are projected.
Base on the surface of the frame and the surface of the precast concrete foundation
It is characterized by forming a surface exposed to the outside of the foundation .

[0005]

[0006]

According to the present invention having the above-described structure, the template is arranged on both the front and back sides of the connecting portion between the precast concrete foundations 1.
Cast concrete between both forms to form a connecting foundation
In doing so, on the back side of the front side
The legs 4 whose protruding length is shorter than the thickness of the connecting base part to be formed
Projecting concrete, placing concrete between the stencils,
After the cure of the REIT, remove the template on the back side and project the legs 4
Since the surface template is left, the surface template
Role of the formwork at the time and role of the decorative surface of the surface of the connection base part 2
It can be used for both, and has excellent workability.
By removing it, it can be reused as a formwork. And
The projecting length of the leg 4 provided on the back side of the formwork on the front surface is
Leg 4 is precast concrete.
Buried only within the thickness of the connecting foundation 2 filled between the foundations 1
The legs 4 do not affect the mold on the back side.
As a result, when removing the formwork on the back, set it on the formwork on the front
Leg 4 does not hinder the removal of the formwork on the back side.
Even if the formwork on the back side is removed, the legs 4
It does not expose to the back side or jump out.

[0007]

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Adjacent precast concrete foundations 1 are faced to each other with a space between their end faces, and a template is arranged on each side of a connecting portion. Is formed, and adjacent precast concrete foundations 1 are connected to each other via the connection base portion 2.

Here, the template includes a template on the front side and a template on the back side, and the template on the front side is a patterned concrete template 3 having a decorative surface on the surface. here,
The patterned concrete template 3 is formed as follows. Mold A for molding patterned concrete template 3
Is mainly composed of a base 5 and a frame 6 as shown in FIG. On the upper surface of the base 5, a rectangular weir 7 is provided around the entire circumference, and a pattern forming surface 8 made of irregularities is provided on the upper surface surrounded by the weir 7. On both sides of the base 5, a fastening screw 9 which can be turned upside down is provided. The frame 6 is formed in a rectangular shape by four frame members 6a and 6b. Frame material 6
a fastening screw 10 is rotatably mounted on both ends of the frame member 6a, locking portions 11 are provided on both ends of the frame member 6b, and the frame members 6a and 6b are arranged in a rectangular shape to tighten the fastening screw member 10. The frame member 6 can be assembled by connecting the four frame members 6a and 6b by locking and locking the locking member 11 to the locking portion 11. The frame 6 is provided with a locking portion 12 corresponding to the fastening screw 9 of the base 5. Further, the mold A is provided with a metal fitting 13 as an accessory.
The size of the patterned concrete template 3 to be formed can be adjusted.

The molding of the patterned concrete template 3 is performed as follows. The frame 6 is placed on the base 5 with the frame 6 assembled in a rectangular shape. At this time, the frame 6 is set so that the inner peripheral surface is along the weir portion 7. Then, the fastening screw 9 is locked to the locking portion 12 and the fastening screw 9 is tightened to fix the frame 6 on the base 5. At this time, the area inside the frame 6 is adjusted by inserting a metal 13 into the frame 6 as necessary. On the other hand, reinforcing bars 14 arranged in a grid
Is attached with a leg piece 4a as an example of the leg 4. The leg piece 4a is formed of an elongated plate, and has a saw blade portion 15, a plurality of through holes 16, and a locking notch 17. This leg piece 4a
Are arranged in parallel in a plurality of rows (two rows in the present embodiment), and are attached by locking the notches 17 to the reinforcing bars 14. The reinforcing bar 14 is arranged on the pattern forming surface 8 of the forming die A. In this state, concrete is put in the frame 6 to form the patterned concrete template 3. At this time, the pattern 18 is formed on the front surface of the pattern forming surface 8, and the leg pieces 4a protrude from the rear surface. After the concrete is hardened, the frame 6 is removed from the base 5, the frame 6 is disassembled, and the patterned concrete template 3 as shown in FIG. 3 is removed. The leg 4a protrudes from the back surface of the patterned concrete template 3, and the saw blade portion 15 and the through hole 16 of the leg 4a are exposed.

The patterned concrete template 3 constructed as described above is used for connecting the precast concrete foundation 1 as follows. The precast concrete foundation 1 is formed by providing a pattern 18 in advance when molding it. A plurality of precast concrete foundations 1 are arranged and the end faces of adjacent precast concrete foundations 1 are opposed to each other with a space therebetween, and the patterned concrete template 3 is arranged on the surface side of this part as shown in FIG.
A mold is assembled by disposing a back template 19 on the back side, and concrete is cast between the concrete template 3 with the pattern and the back template 19 to form the connection base part 2. After the concrete is hardened, the back template 19 is removed leaving the concrete template 3 with a pattern on the front surface. The patterned concrete template 3 remaining on the surface is integrated with the surface of the connecting base 2 to form a pattern 18 on the surface. As shown in FIG.
Eight foundations are formed. Patterned concrete template 3
Are attached so that the leg pieces 4a bite into the connection base part 2 and are attached with a strong adhesive force.

FIGS. 5 and 6 show another embodiment of the patterned concrete template 3 used in the present invention. In the case of this embodiment,
The leg 4 is formed by a leg bar 4b. The leg bar 4b is formed by cutting and raising a part of the reinforcing bar 14 in a staggered manner. Also in this case, the patterned concrete template 3 is a leg piece 4.
b is bitten into the connection base 2 to be firmly attached.

FIG. 7 shows still another embodiment of the patterned concrete template 3 used in the present invention. In the case of this embodiment, the legs 4 are formed of the fibers 4c. In this case, the patterned concrete template 3 is firmly attached by the fibers 4c penetrating into the connection base portion 2. By the way, in the present invention
The legs projecting from the back of the patterned concrete template 3
4 is shorter than the thickness of the connecting base 2 as shown in FIG.
Projection length, leg 4 is precast concrete
Buried only within the thickness of the connecting foundation 2 filled between the foundations 1
The legs 4 do not affect the mold on the back side.
As a result, when removing the formwork on the back, set it on the formwork on the front
Leg 4 does not hinder the removal of the formwork on the back side.
Even if the formwork on the back side is removed, the legs 4
Not to be exposed on the back side or jump out
I have.

[0014]

According to the first aspect of the present invention, a template is arranged on both front and back sides of a connecting portion between precast concrete foundations, and concrete is poured between the forms to form a connecting foundation. In forming, on the back of the mold on the front side of the molds on both sides, projecting legs with a projecting length shorter than the thickness of the connection base part are projected, and concrete is poured between these molds,
After the concrete has hardened, remove only the template on the back side, and leave only the template on the surface on which the legs protrude, and remove the mold from the surface of the remaining formwork.
Exposed to the outside of the foundation with the surface of the recast concrete foundation
Because it forms a surface that out, becomes the mold surface side is leaving as part of the foundation, as a result, the decorative surface of the connection base portion by integral mold to the surface side of the connecting base part Finished and precast concrete foundation surface
And the surface of the formwork left on the front side of the connection base
The appearance of the surface exposed to the outside of the body is improved, the formwork can be used as a decorative surface and the workability can be improved, and by removing the backside mold plate, it can be reused as a formwork Therefore, the cost can be reduced, and the mold on the back side is removed despite leaving the mold on the front side.
After the concrete is cast, the concrete surface on the back side can be exposed to check whether or not the concrete is sufficiently filled. In addition, a check can be performed after an earthquake or land subsidence, and repair can be performed later. Also,
When placing and filling concrete, use a vibrator to fill the formwork on the back side to be removed or hit the formwork on the back side to be removed with a hammer to check the casting state and apply it to the formwork. Even if scratched, there is no problem because it is the mold to be removed. Moreover, since the surface of the template with the legs protruding is left, the legs are buried only within the thickness of the connecting foundation portion filled between the precast concrete foundations, and the legs do not affect the mold on the back side, As a result, when removing the backside formwork, the legs provided on the front formwork do not hinder the removal of the backside formwork. It is not exposed on the back side or jumps out and does not impair the appearance as a base.

[0015]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a precast concrete foundation of the present invention is connected.

FIG. 2 is a cross-sectional view showing a state before a back template of the connection base unit is removed.

3A and 3B show an embodiment of a patterned concrete template used in the embodiment of the present invention, wherein FIG. 3A is a perspective view and FIG. 3B is XX 'of FIG.
It is a line sectional view.

FIG. 4 is an exploded perspective view showing a molding die used in the same.

5A and 5B show another embodiment of the patterned concrete template according to the embodiment, wherein FIG. 5A is a sectional view and FIG. 5B is a rear view.

FIG. 6 is a sectional view showing a state in which the patterned concrete template according to the first embodiment is attached to a connection base.

7A and 7B show still another embodiment of the patterned concrete template according to the above, wherein FIG. 7A is a side view and FIG. 7B is a rear view.

FIG. 8 is a perspective view showing connection of a conventional precast concrete foundation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Precast concrete foundation 2 Connection foundation 3 Patterned concrete template 19 Back template

Continuation of the front page (56) References JP-A-53-38115 (JP, A) JP-A-3-55336 (JP, A) Japanese Utility Model Application No. 2-32009 (Japanese Utility Model Application Laid-open No. 3-125584) Microfilm photographing the contents of the attached specification and drawings (JP, U) Microphotographing the contents of the specification and drawings attached to the application for Japanese Utility Model Application No. 51-83065 (Japanese Utility Model Application No. 53-1905). Film (JP, U)

Claims (1)

(57) [Claims] When laying a template on both sides of a connecting portion of precast concrete foundations and placing concrete between the forming frames to form a connecting base portion, a mold on the surface side of the forming frames on both sides. Projecting legs with a projecting length shorter than the thickness of the connecting base on the back of the frame, casting concrete between these templates, removing only the template on the back after the concrete hardens, and projecting the legs Leaving only the mold surface of
Foundation with precast concrete foundation surface
A method for constructing a precast concrete substructure, comprising forming a surface exposed to the outside of a concrete.