JPH07292689A - Precast concrete foundation structure and construction method thereof - Google Patents

Abstract

PURPOSE:To serve the role of a form as well as a decoration part of a continuous foundation by mounting one pieceform to a continuous foundation which comprises concrete placement of the connection part on the front side of the connection part between precast concrete foundations. CONSTITUTION:A plurality of precast concrete foundations 1, to which a pattern 18 is preliminarily installed, are lined up where the end faces of their adjacent foundations are arranged to be opposed to each other with a spacing. A patterned concrete form 3 is laid out on the front side of the area while a rear side form 19 is laid out on the rear side and then the form is assembled and concrete is cast, thereby forming a continuous foundation 2. Then, the concrete is cured, the form 3 on the front surface is left over and the form 19 is removed. The form 3 which is left over on the front surface, is integrated with the surface of the foundation, thereby forming the pattern 18 on the front surface. This construction makes it possible to allow the form 3 to play the role of the form during concrete placement and a decoration part of the foundation 2 as well.

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 poured into a joint portion between precast concrete foundations to form a joint foundation portion, and a construction method thereof.

[0002]

2. Description of the Related Art Conventionally, precast concrete foundation 1
When connecting, the end faces of the precast concrete foundations 1 adjacent to each other are opposed to each other with a space therebetween, the molds are assembled on both sides of this part, the concrete is cast, and after the concrete is hardened, the molds on both sides are removed to show the figure. The connection base 2 was formed as shown in FIG. The precast concrete foundation 1 is connected in this way, but some foundations require a decorative finish on their surface. In this case, the precast concrete foundation 1 can be finished by patterning by using a makeup finish on the surface at the Akaraji factory, but 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 problems of the above-mentioned conventional examples, and its object is to make the makeup of the surface of the connection foundation between precast concrete foundations mold. A precast concrete foundation structure and its construction method that can be done with a plate, can be used as a formwork at the time of concrete pouring, and can also serve as a makeup of the connection foundation part, and the formwork on the back side of both formwork can be reused. It is the one we are trying to provide.

[0004]

In order to achieve the above object, the precast concrete foundation structure of the present invention is a connection foundation portion made of concrete cast on the connection portion on the surface side of the connection portion between the precast concrete foundations 1. It is characterized in that it is formed by mounting an integrated template on the 2.

Further, the method for constructing a precast concrete foundation structure of the present invention is such that a template is arranged on both front and back sides of a connecting portion of the precast concrete foundations 1, concrete is placed between the template, and the concrete is hardened. After that, the template on the back side is removed, and the template on the front side is left.

[0006]

According to the present invention having the above construction, the template integrated with the connecting base portion 2 made of concrete cast on the connecting portion is mounted on the surface side of the connecting portion between the precast concrete foundations 1. Thus, the template can serve both as a formwork at the time of concrete pouring and as a decorative surface on the surface of the connection base part 2.

Further, according to the method of the present invention, the template is arranged on both front and back sides of the connecting portion of the precast concrete foundations 1, the concrete is placed between the template, and after the concrete is hardened, the mold on the rear surface is set. Since the plate is removed and the surface template is left, the surface template can be used both as a formwork at the time of concrete pouring and as a decorative surface on the surface of the connection base 2, which is excellent in workability. By removing the template on the back side, it can be reused as a mold.

[0008]

[Examples] Adjacent precast concrete foundations 1 are arranged such that end faces are opposed to each other with a space therebetween, template plates are arranged on both sides of the joint portion, and concrete is placed between the template plates to join the joint foundation portion 2 And the adjacent precast concrete foundations 1 are connected to each other via the connection foundation portion 2.

Here, there are a front surface side template and a back surface side template as the template, and a patterned concrete template 3 having a decorative surface is used as the surface side template. here,
The patterned concrete template 3 is molded as follows. Mold A for molding patterned concrete template 3
As shown in FIG. 4, the main body is composed of a base 5 and a frame 6. On the upper surface of the base 5, a rectangular weir portion 7 is provided all around, and a pattern forming surface 8 having irregularities is provided on the upper surface surrounded by the weir portion 7. On both sides of this base 5, a tightening screw tool 9 which can be tilted up and down is provided. The frame body 6 is formed in a rectangular shape with four frame members 6a and 6b. Frame material 6
A tightening screw tool 10 is rotatably attached to both ends of a, and locking portions 11 are provided to both ends of the frame member 6b, and the frame members 6a and 6b are arranged in a rectangular shape. The frame body 6 can be assembled by connecting the four frame members 6a and 6b by locking and tightening on the locking portion 11. The frame 6 is provided with a locking portion 12 corresponding to the tightening screw tool 9 of the base 5. Further, the metal mold 13 is provided as an accessory to the molding die A.
The size of the patterned concrete template 3 to be molded in can be adjusted.

The molding of the patterned concrete template 3 is carried out as follows. The frame body 6 is mounted on the base 5 in a state where the frame body 6 is assembled in a rectangular shape. At this time, the inner peripheral surface of the frame body 6 is set along the weir portion 7. Then, the tightening screw tool 9 is locked to the locking portion 12 and the tightening screw tool 9 is tightened to fix the frame body 6 on the base 5. At this time, the metal 13 is put in the frame body 6 as needed to adjust the area in the frame body 6. On the other hand, rebar 14 assembled in a grid pattern
A leg piece 4a as an example of the leg 4 is attached to the. The leg piece 4a is formed of an elongated plate and has a saw-toothed portion 15, a plurality of through holes 16 and a locking cutout 17. This leg piece 4a
Are arranged in parallel in a plurality of rows (two rows in this embodiment), and are attached by locking the locking notches 17 to the reinforcing bars 14. The rebar 14 is placed on the pattern forming surface 8 of the forming die A. In this state, concrete is put in the frame body 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 are projected 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. In this patterned concrete template 3, the leg pieces 4a are projected from the back surface, and the saw blade portions 15 and the through holes 16 of the leg pieces 4a are exposed.

The patterned concrete template 3 constructed as described above is used as follows for connecting the precast concrete foundation 1. The precast concrete foundation 1 is formed by providing a pattern 18 in advance when molding the precast concrete foundation 1. A plurality of precast concrete foundations 1 are arranged side by side so that the end faces of the 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 portion as shown in FIG.
The back surface template 19 is arranged on the back surface side to assemble a mold, and concrete is placed between the patterned concrete template 3 and the back surface template 19 to form the connection base portion 2. After the concrete is hardened, the back template 19 is removed leaving the patterned concrete template 3 on the surface. The patterned concrete template 3 remaining on the surface is integrated with the surface of the connection base portion 2 to form a pattern 18 on the surface, and the pattern 1 is formed on the entire surface as shown in FIG.
A certain foundation of 8 is formed. Patterned concrete template 3
The leg pieces 4a are attached so as to bite into the connection base portion 2 and are attached with a strong adhesive force.

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 zigzag manner. Also in this case, the patterned concrete template 3 is the leg piece 4
The b is bited into the connection base portion 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 leg 4 is formed of the fiber 4c. In this case, the patterned concrete template 3 is firmly attached by the fibers 4c biting into the connection base portion 2.

[0014]

According to the invention described in claim 1 of the present invention, the template integrated with the connecting foundation part made of concrete cast on the connecting part on the surface side of the connecting part of the precast concrete foundations. Since it has been attached, the template integrated on the surface side of the connection base part can make the surface of the connection base part make-up and improve the appearance of the entire base.
It can be used both as a formwork and a decorative surface.

According to the second aspect of the present invention, template plates are arranged on both front and back sides of the joint between the precast concrete foundations, and concrete is placed between the template plates.
After the concrete is hardened, the backside template is removed and the frontside template is left, so the frontside template can serve both as a formwork for concrete pouring and as a decorative surface on the surface of the connecting foundation. The workability is improved, and by removing the template on the back side, the template can be reused and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which precast concrete foundations of the present invention are connected.

FIG. 2 is a cross-sectional view of the same connection base portion before removing the back surface template.

FIG. 3 shows an embodiment of a patterned concrete template used in the above, (a) is a perspective view, (b) is XX ′ of (a).
It is a line sectional view.

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

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

FIG. 6 is a cross-sectional view showing a state in which the above-described patterned concrete template is attached to the connection base portion.

FIG. 7 shows still another embodiment of the above-mentioned patterned concrete template, (a) is a side view and (b) is a rear view.

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

[Explanation of symbols]

 1 Precast concrete foundation 2 Connection foundation 3 Concrete concrete template 19 Back template

Claims (2)

[Claims] 1. A precast concrete foundation structure characterized by comprising an integrated template attached to a connection foundation portion made of concrete cast in the connection portion on the surface side of the connection portion between the precast concrete foundations. . 2. A template is placed on both front and back sides of a connecting portion of precast concrete foundations, concrete is placed between the templates, the template on the back is removed after hardening of the concrete, and the template on the surface is removed. A method for constructing a precast concrete foundation structure characterized by leaving.