JP2869341B2 - Forming plate for formwork for retaining wall construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming plate for a formwork for retaining wall construction, and more particularly, to a method for forming a retaining wall without removing it after hardening concrete.
The present invention relates to a formed plate that forms a wall surface of a retaining wall as it is.

[0002]

2. Description of the Related Art Conventionally, in a construction work of a retaining wall, a predetermined concrete filling space is formed by a mold formed by assembling a molded plate manufactured in a factory in advance. There is a construction method in which concrete is poured into a space.
No. 138 publication. According to this method, since the retaining wall surface is formed without removing the front-side formwork, the work of removing the formwork can be omitted.

[0003] However, the technique disclosed in the above publication is to remove the back mold on the side against the earth pressure after the curing of the concrete is completed. Therefore, since the operation of removing the back mold is required, the operation is not sufficiently simplified.

[0004] Furthermore, the formed plate of the formwork used here is not able to withstand the earth pressure due to insufficient strength of a flat thin plate material. Therefore, even if the back mold is left as it is and the soil is to be backfilled, the backfill must be performed after the cast concrete has hardened. Then I had to wait for the concrete curing to finish, so I had to stop working.

[0005] In recent years, in view of the social situation of protecting the scenery, a retaining wall with an emphasis on aesthetics has been required, and a formwork with a beautiful appearance has been demanded.

Accordingly, an object of the present invention is to provide a molding plate for a retaining wall construction formwork which is reinforced so that it can be backfilled without waiting for concrete curing, or which exhibits a beautiful appearance. .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, a first aspect of the present invention is a molding for forming a concrete filling space by forming a retaining wall construction form by arranging them face to face. In the plate, the formed plate has a curved concave side.
At least one of the molded plates has a curved surface, and the convex surface of the curved surface is arranged vertically with the convex direction facing the outside of the concrete filling space. It is characterized by forming a part.

[0008] The second aspect of the present invention is a system in which the two components are opposed to each other.
Forming a retaining wall construction form to fill the concrete filling space
In the molded plate for forming the, the molded plate is curved in one direction, the convex side of this curve is arranged with the convex side facing outward, and after the concrete is hardened, the retaining wall is formed.
It is characterized by forming a part .

[0009] According to a third aspect, parallel upright to face
Forming a retaining wall construction form to fill the concrete filling space
In the forming plate for forming the above, one side of the forming plate is a flat surface, the other surface is a curved surface, and the one surface is arranged outside with the one surface facing outward, and the concrete is cast.
After hardening, it forms part of the retaining wall .

According to a fourth aspect of the present invention, in the forming plate of the retaining wall construction formwork according to any one of the first to third aspects, the forming plate applies a tensile force to the PC steel wire during manufacturing. After the concrete is cast and hardened, the PC steel wire adheres to the concrete, whereby the tensile force applied to the PC steel wire is transmitted to the concrete, and a prestress is given. I do.

According to a fifth aspect of the present invention, in the molded plate of the retaining wall construction formwork according to any one of the first to fourth aspects, the molded plate is provided with a pattern or coloring on an outer surface. It is characterized by becoming.

[0012]

According to the first aspect of the present invention, the formed plates are vertically arranged with the convex direction facing outward. For example, as in the second aspect of the present invention, when it is curved in one direction, the convex side faces outward. Thus, the convex direction is directed outward.
When it is placed vertically, this molded plate has a convex outer surface.
To reduce the stress caused by external pressure.
Action to provide sufficient strength.
You. Then fill the soil before the concrete hardens
Even if returned, the strength of the formed plate is large, so
Then, it will function as a retaining wall. further,
Leave the molding plate on the opposite side, without removing it, of the retaining wall.
Since the walls are formed, there is no need to remove the molded plate
Thus, the operation can be simplified. Alternatively, when one surface is a flat surface and the other surface is a curved surface as in the third aspect of the present invention, turning the convex direction outward means turning the convex direction of the curved surface outward. That is, the surface that forms a plane faces outward.

[0013]

[0014]

According to the molded plate of the fourth aspect, P
Since the tensile force is given by the C steel wire, cracks are less likely to occur when the concrete hardens.

Furthermore, according to the molded plate of the fifth aspect,
Since the outer surface is patterned or colored, the outer surface has a beautiful appearance.

[0017]

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

FIG. 1 is a side view showing a formwork for constructing a retaining wall constituted by using a molded plate according to the embodiment. In the drawing, the retaining wall form 10 has a pair of formed plates 20 arranged outside a pair of assembly reinforcing bars 12 erected in advance, and the opposing formed plates 20 are connected by a connecting reinforcing bar 14. It is composed of Then, concrete is poured into the concrete filling space 16 defined by the pair of forming plates 20 to form a retaining wall. And
When the retaining wall is completed, the retaining wall form 10 forms a part of the retaining wall without being removed.

Next, FIG. 2 shows the formed plate used in FIG. 2, (A) is a front view, (B) is a plan view,
(C) is a side view.

The molded plate 20 is a concrete plate curved in one direction as shown in FIG.
When configuring the retaining wall formwork 10, as shown in FIG.
The convex sides of the curves are arranged side by side outward. By doing so, the curved shape acts on an arch action to alleviate the stress caused by the pressure from the outside, thereby increasing the strength. Accordingly, even if the soil is buried before the concrete filled in the concrete filling space 16 hardens, the molded plate 20 can withstand the earth pressure.

Further, the formed plate 20 has a PC steel wire 2 inside.
Since it has No. 2, the strength is further increased, and cracks are less likely to occur. Specifically, at the time of manufacturing the molded plate 20,
A tensile force is applied to the PC steel wire 22, and after the concrete for manufacturing the molded plate 20 is hardened, the PC steel wire 22 adheres to the concrete, thereby transmitting the tensile force applied to the PC steel wire to the concrete. , Pre-stressed.

The formed plate 20 is provided with mesh streaks 24. The mesh streaks 24 are formed by bending a plurality of slightly thin reinforcing bars so as to draw a rectangular parallelepiped box, a part of which is buried in the formed plate 20, and the remaining portion is formed from the curved concave side surface of the formed plate 20. It protrudes. The mesh streaks 24 are provided integrally with concrete while being temporarily fixed to the PC steel wire 22. Note that the mesh streaks 24 are omitted in FIG.

By providing such mesh streaks 24, when concrete is cast into the concrete filling space 16 (see FIG. 1), the mesh streaks 24 are unified with the cast concrete, and the molded plate 20 peels off. Can be prevented.

Further, the forming plate 20 has a mounting bracket 26 on the concave side of the curve. The mounting bracket 26 has a ring portion 26a formed by bending and forming, as shown in FIG.
The end of the connecting reinforcing bar 14 is inserted and hooked into 6a. Thus, the formed plate 20 is supported so as not to fall outside. The connecting reinforcing bar 14 is formed by bending both ends of the reinforcing bar in the same direction. The connecting bar 14 is cut into a thread at the bent end, inserted into the ring portion 26a, and fixed with a nut. It may be.

The formed plate 20 according to the present embodiment is configured as described above. Next, a mold for manufacturing the formed plate 20 will be described.

FIG. 3 is a perspective view showing a mold used when manufacturing a molded plate. This form 30 for manufacturing a molded plate
Has a cylindrical shape with a bottom and is capable of injecting concrete inside, and is rotated around a central axis to press the concrete inward by centrifugal force to form a molded plate 20.
Is to manufacture.

That is, the molded plate manufacturing mold 30 is a mold for manufacturing the molded plate 20 by a centrifugal force forming method.

FIG. 4 is a cross-sectional view of the mold for manufacturing a molded plate cut at right angles to the center axis. FIG. 4 shows a state after the manufacturing of the molded plate 20, and the molded plate 20 is not illustrated with the mesh streaks 24 and the mounting hardware 26 (see FIG. 2).

As shown in FIG. 4, a mold 30 for forming a molded plate is provided.
Is formed into a cylindrical shape by connecting a plurality of curved form pieces 32 in the axial direction and the circumferential direction (see FIG. 3). A plurality of flanges are formed on the outside of the curvature of each mold piece 32. Specifically, the flange 32a disposed at the center of the mold piece 32 is for reinforcement, and the flange 32b formed at the end of the mold piece 32 is formed with bolts and nuts. It is for connecting each other.

Further, a flange 32c is formed inside the curved portion of the mold piece 32 so as to be continuous with the flange 32b. This flange 32c is used for the forming frame 3 for forming a molded plate.
This is for partitioning the poured concrete into the size of the molded plate 20 when the concrete is poured into the inside of the mold.

Further, as described above, the formed plate 20 is made of P
The PC steel wire 22 has a C steel wire 22 as shown in FIG.
Are arranged as shown in FIG. That is, a plurality of end mold pieces 34 are attached to the end of the mold piece 32 in a ring shape, and the PC steel wire 22 can be attached by the end mold pieces 34. Note that, in FIG. 3, a plurality of members are denoted by reference numerals only for some members.

More specifically, a clamp jig 36 is provided on the end form piece 34, and the PC steel wire 2 to which a tensile force is applied is provided.
2 is clamped and held. This clamp jig 36 may have any configuration as long as it can hold the PC steel wire 22 in a pulled state, and specifically, a well-known one is used, and therefore a detailed description is omitted.

The end mold piece 34 is formed with a window 34a penetrating from the outer peripheral surface to the inner peripheral surface. The PC steel wire 22 is exposed from the window 34a to the outside. I have. Therefore, after compaction and curing of the concrete by centrifugal force forming are completed, the PC steel wire 22
Can be easily cut.

The mold 30 for producing a molded plate is configured as described above. Next, a method for producing the molded plate 20 using the mold 30 for producing a molded plate will be described.

First, as shown in FIG. 3, a PC steel wire 22 is arranged in a forming frame 30 for manufacturing a formed plate. At this time, a tensile force is applied to the PC steel wire 22 as described above. Then, a mesh streak 24 (see FIG. 2) is attached to the PC steel wire 22 so as to be wound, and a mounting hardware 26 (see FIG. 2) is attached to the PC steel wire 22.

Next, concrete is poured from the opening with the mold 30 for forming a molded plate upright. The amount of the concrete to be poured is calculated in advance based on the size and the number of molded plates 20 to be manufactured. After the pouring is completed, the molded plate manufacturing formwork 30 is laid horizontally, and a spatula or the like is inserted through the opening to level the concrete.

After the above steps are completed, the molded plate manufacturing form 30 is placed on a rotating device (not shown) and rotated by a clean or the like while being laid down. Concretely, concrete is first leveled at low speed rotation, concrete is stuck at medium speed rotation, and excess water is lifted out by centrifugal separation, and the inner surface of concrete is made uniform at high speed rotation to prevent falling.

In this manner, for a predetermined time, the mold 3
When 0 is rotated, the state of FIG. 4 is maintained even before curing because the internal concrete is compacted. Therefore, even if the rotation of the forming frame 30 is stopped, it does not collapse. After that, the molded plate 20 is completed by performing oak curing.

Next, a modification of the above embodiment will be described.

FIG. 5 is a view showing a modified example of the mold for manufacturing a molded plate shown in FIG. In FIG. 5, the mold 40 for forming a molded plate is split in half along the axial direction with the hinge 42 as the center. When the centrifugal force forming is completed, the concrete is cylindrical. Therefore,
By cutting this cylindrical concrete at the position indicated by the dashed line in FIG. 5, the molded plate 44 is manufactured.

Next, FIG. 6 is a perspective view showing a modification of the forming plate 20 shown in FIG. The molded plate 50 in FIG.
A rod-shaped mounting bracket 52 protrudes from the concrete body 54, and the mounting bracket 52 is formed by cutting the mesh streaks 24 in FIG.

FIG. 7 is a diagram showing a retaining wall form 56 constructed by assembling the molded plate of FIG. In FIG. 7, a horizontal reinforcing bar 58 is attached in a horizontal direction to an assembling reinforcing bar 12 erected in a vertical direction, and a forming plate 50 is fixed by winding a mounting bracket 52 around the horizontal reinforcing bar 58. In this way, concrete is poured into the space formed between the opposing forming plates 50, 50 to form a retaining wall.

Next, FIG. 8 is a side view showing another modification of the forming plate 20 shown in FIG. Formed plate 60 in FIG.
The surface 62 on the opposite side of the mesh streaks 24 and the mounting hardware 26
However, it differs from the above-mentioned formed plate 20 in that it is flat.

The steps of manufacturing such a molded plate 60 will be described with reference to FIG. In this figure, a mold plate manufacturing mold 40 of FIG. 5 is used, and a rubber plate 62 is attached inside. Specifically, since one surface of the rubber plate 62 is a curved surface and the other surface is a flat surface, when the curved surface side is attached to the inside of the molded plate manufacturing mold 40, the other flat surface is inward. Placed in Then,
Since 12 rubber plates 62 are attached, 12
It becomes a square inner surface. Therefore, if concrete is poured into such an inner surface forming plate forming mold 40 and centrifugal molding is performed, a tube having an outer peripheral surface of a dodecagon is formed. And
If this tube is cut as shown in FIG. 9, the formed plate 60 shown in FIG. 8 can be manufactured. Here, if an uneven pattern is formed on the rubber plate 62, a corresponding uneven pattern can be formed on the surface of the molded plate 60.

Alternatively, the various molded plates described above can be colored to give a beautiful appearance. As a coloring method, in addition to a method of coloring a completed formed plate, there is a method of injecting pre-colored concrete and forming a formed plate by centrifugal force forming. In addition, if only the outer surface of the molded plate is formed of colored concrete and the intermediate layer and the inner surface are formed of uncolored concrete, the increase in cost due to colored concrete can be minimized.

Although FIGS. 1 and 7 show a state in which the formed plates are stacked so as to form a half-wave shape in the vertical direction, the present invention is not limited to this, and is not limited to this. The formed plates may be stacked so as to form a corrugated shape. That is, although FIGS. 1 and 7 are side views, the retaining wall construction formwork may be constructed so as to have a form similar to that shown in these figures in plan view.

[0047]

As described above, according to the first or second aspect of the present invention, since it acts to cancel the pressure from the outside and has sufficient strength, the soil is hardened before the concrete hardens. Can be backfilled.

According to the molded plate of the fourth aspect, P
It is strengthened by the C steel wire, and cracks are less likely to occur.

Further, according to the molded plate of the fifth aspect,
Since the outer surface is patterned or colored, the outer surface can have a beautiful appearance.

[Brief description of the drawings]

FIG. 1 is a side view showing a formwork for constructing a retaining wall constituted by using a molded plate according to an embodiment.

FIG. 2 is a view showing a formed plate used in FIG. 1;
(A) is a front view, (B) is a plan view, and (C) is a side view.

FIG. 3 is a perspective view showing a mold frame used when manufacturing a molded plate.

FIG. 4 is a cross-sectional view of a mold for manufacturing a molded plate cut at a right angle to a central axis.

FIG. 5 is a view showing a modification of the mold for manufacturing a molded plate shown in FIG. 4;

FIG. 6 is a perspective view showing a modified example of the molded plate shown in FIG.

FIG. 7 is a view showing a retaining wall form constructed by assembling the molded plate of FIG. 6;

FIG. 8 is a side view showing another modified example of the formed plate shown in FIG.

FIG. 9 is a sectional view showing a molded plate manufacturing form and a rubber plate for manufacturing the molded plate of FIG. 8;

[Explanation of symbols]

 10, 56 Retaining wall form 16 Concrete filling space 20, 44, 50, 60 Formed plate 22 PC steel wire 30, 40 Formed form for forming plate

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) E02D 29/02 309

Claims (5)

(57) [Claims] 1. A molded plate for forming a concrete filling space by forming a retaining wall construction form by lining up and facing each other , wherein the molded plate has a curved concave side surface, and the molded plate has a curved concave side surface. At least one has a curved surface, and the convex surface of the curved surface is arranged upright toward the outside of the concrete filling space, and forms a part of a retaining wall after hardening of the poured concrete. Forming plate for formwork for wall construction. 2. A formwork for constructing a retaining wall by arranging the molds in opposition.
Forming and forming to form concrete filling space
In the board, the formed board is curved in one direction, and the convex side surface of the curved face is directed to the outside, and the concrete board is arranged and placed.
The molded plate of the retaining wall construction formwork, which forms a part of the retaining wall after curing . 3. A retaining wall construction formwork is arranged in a vertical position facing each other.
Forming and forming to form concrete filling space
In the plate, the molded plate has one surface forming a flat surface, the other surface forming a curved surface, and the one surface facing outward, and is arranged side by side ,
The molded plate of the retaining wall construction formwork, which forms part of the retaining wall after the concrete has been cast and hardened . 4. The molded plate of a retaining wall construction formwork according to claim 1, wherein the molded plate is configured to apply a tensile force to a PC steel wire during manufacturing, And the prestress is applied by transmitting the tensile force applied to the PC steel wire to the concrete by adhering the PC steel wire to the concrete after the casting and hardening of the retaining wall. Molded plate of construction formwork. 5. The molded plate of the retaining wall construction formwork according to claim 1, wherein the molded plate has a pattern or color applied to an outer surface thereof. Plate of the formwork for building retaining walls.