JP4961483B2 - Concrete formwork for concrete and concrete structure with this on the outer surface - Google Patents

Description

  The present invention relates to a concrete decorative mold and a concrete structure having the same mounted on an outer surface.

  Some concrete molds used in building concrete structures in the mountains such as the Shizan Dam and Sabo Dam do not demold after the concrete has hardened. In recent years, consideration has been required for the appearance of structures, even in the mountains, and such concrete forms that do not require removal have been proposed that have an appearance that blends into the scenery in the mountains.

As such a decorative formwork for concrete, for example, it consists of an outer wall surface of a formwork stacked in contact with a vertically arranged thinning material along a vertical material made of light-grooved steel. Patent Document 1 discloses a configuration in which a material is fixed and attached to a side wall portion of a vertical member with a coach screw.
In addition, a plurality of H-shaped steels are erected along the height direction of the wall surface of the concrete structure to be constructed with a required interval in the horizontal direction, and the U-shape is surrounded by the H-shaped steel flange and web. Patent Document 2 discloses a configuration in which an outer wall surface of a formwork is constructed by dropping an end portion of a thinned material from above into a portion that is formed and setting the thinned material between H-shaped steels.

Utility Model Registration No. 3095342 JP-A-2005-290914

Since the outer wall of the formwork is made of thinned timber (wood), the concrete surface of the structure in the mountains where a forested dam, sabo dam, etc. is constructed is used. It is suitable because it is not exposed.
However, in the technique disclosed in Patent Document 1, since the thinned wood is fixed and attached to the side wall portion of the vertical member with a coach screw, water enters from the part that is attached and processed by the coach screw. However, thinned wood may corrode within a few years from this fixed part. That is, concrete structure of mounting the concrete cosmetic formwork structure as disclosed in Patent Document 1, after the start of a test, thinnings in just a few years is said that there is a possibility that left the upright member The danger has been revealed.

  In order to solve such a problem, a configuration as shown in Patent Document 2 has been proposed. In the decorative formwork for concrete disclosed in Patent Document 2, since there is no portion of the thinned wood that has been processed with a coach screw, there is no corrosion of the thinned wood, and it is possible to prevent the thinned wood from leaving the vertical wood for a long period of time. However, because H-shaped steel is used for the vertical member and wood is dropped into the U-shaped part of the H-shaped steel and the wood is attached, the flange portion of the H-shaped steel is exposed on the outer surface of the concrete structure. There exists a subject that the external appearance form of the concrete formwork for concrete and the concrete structure which attached this to the outer surface will be impaired.

  Accordingly, the present invention provides a concrete decorative mold that has an excellent external appearance and the outer surface of the concrete forming frame is not detached from the pillars, which are vertical members, and is mounted on the outer surface. The purpose is to provide a finished concrete structure.

In order to solve the above-mentioned problems, the present invention has been intensively studied, and as a result, has arrived at the following configuration.
That is, a concrete decorative mold frame in which struts having a flange portion and a web portion are erected at a required interval and wood is disposed between the struts, and the flange portions are provided at both ends of the wood. A wall portion is formed by stacking a plurality of pieces of wood along the upright direction of the column in a state where the flange portion is inserted into the groove portion , A concrete decorative form frame in which a sealing material is disposed on a portion where the flange portion is exposed from the outer wall surface, and a concrete structure in which this is mounted on at least a part of the outer surface. .

According to the concrete decorative frame for concrete according to the present invention and the concrete structure having this mounted on the outer surface, the flange portion provided on the column is inserted into the groove formed in the wood constituting the outer wall surface, Since the wood which is the outer wall surface is assembled, it is possible to prevent the wood from being detached from the support. In addition, since the flange part of the column is almost inserted in the groove formed in the wood, the column is hardly exposed on the outer surface of the concrete structure, and the concrete makeup has excellent aesthetics. Formwork and concrete structures can be provided. Moreover, since the sealing material is disposed on the flange portion slightly exposed from between the woods, it is possible to reliably prevent the concrete from leaking and to prevent the appearance from deteriorating.

It is the perspective view which faced the principal part of the decorative form frame for concrete concerning this embodiment from the inner side. It is the front view (A) which faced the principal part of the decorative form frame for concrete concerning this embodiment from the outer surface side, and the right view (B) with respect to this. It is sectional drawing in the AA in FIG. It is a top view which shows the shape of the both ends of wood. It is the front view and right view which show the state in each process in the construction process of the concrete structure using the decorative form frame for concrete in this embodiment. It is the front view and right view which show the state in each process in the construction process of the concrete structure using the decorative form frame for concrete in this embodiment. It is the front view and right view which show the state in each process in the construction process of the concrete structure using the decorative form frame for concrete in this embodiment. It is the front view and right view which show the state in each process in the construction process of the concrete structure using the decorative form frame for concrete in this embodiment. It is the front view and right view which show the state in each process in the construction process of the concrete structure using the decorative form frame for concrete in this embodiment. It is a right view which shows the state which attached the scaffold to the decorative form frame for concrete concerning this embodiment. It is a top view which shows the other example of embodiment of the timber used for the decorative mold for concrete. It is sectional drawing which shows the state at the time of attaching the timber shown in FIG. 11 to the support | pillar of T-shaped steel.

Hereinafter, an embodiment of a concrete decorative mold 10 according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a main part of a concrete decorative mold according to the present embodiment as viewed from the inside. FIG. 2: is the front view (A) which faced the principal part of the decorative form frame for concrete concerning this embodiment from the outer surface side, and the right view (B) with respect to this. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a plan view showing the shape of both ends of the wood.
The concrete decorative mold 10 in the present embodiment includes a wood 30 as a horizontal member (horizontal material) constituting an outer wall surface, and a column 20 as a vertical member for holding the wood 30 stacked in the height direction. Have. In the present embodiment, an example in which the timber 30 made of a cuboid is used as the timber 30 will be described, but the timber 30 may be formed (sawmilled) in a shape other than a cuboid.

The support column 20 has a flange portion 22 and a web portion 24 for holding the wood 30. In this embodiment, as the support column 20 having such a flange portion 22 and the web portion 24, T-shaped steel having a T-shaped cross section in a direction orthogonal to the axis in the extending direction of the support column 20 is used. Further, through holes 26 are arranged in the web portion 24 with a required interval. The through hole 26 is for reducing the weight of the support column 20 and improving the adhesion strength between the web portion 24 and the concrete placed in the mold. This is advantageous in that the transportation work during construction of the concrete structure 100 in the mountains and the maintenance frequency after use of the concrete structure 100 are greatly reduced.
A scaffold holder 28 for holding a working scaffold member or the like is attached to the outer surface (front side) of the flange portion 22. As shown in FIG. 2, the width dimension of the scaffold holder 28 is formed to be equal to or smaller than the width (plate thickness) dimension of the web portion 24 of the support column 20. A known means such as welding can be used as a method of attaching the scaffold holder 28 to the flange portion 22.

  A plurality of struts 20 formed in this way are erected on the base portion 70 with a required interval in a state where one end side is inserted to the required depth of the base portion 70. The depth of penetration of the support column 20 into the base portion 70 and the interval between the support portion 70 and the base portion 70 are appropriately changed in accordance with the length of the wood 30 constituting the outer wall surface of the concrete decorative mold 10 and the load bearing capacity of the support column 20. be able to. Moreover, in this embodiment, although the support | pillar 20 is standingly arranged in the substantially right angle direction with respect to the surface of the base part 70, the support | pillar 20 is matched with the surface shape of the front side of the concrete structure 100 to construct | assemble ( It is also possible to stand upright (in an oblique direction with respect to the surface of the foundation 70). For the connection in the standing direction of the support column 20, a support member 20 including a connection plate and a connection bolt, or a known method such as welding is used, so that the support column 20 reaches a height corresponding to the height dimension of the concrete structure 100 to be constructed. Can be extended.

  A wood 30 forming the outer wall surface of the concrete decorative mold 10 is attached to the flange portion 22 of the support column 20 erected on the foundation 70. The wood 30 is disposed in a state of bridging between the upright columns 20. Specifically, as shown in FIGS. 3 and 4, the flange portion 22 is inserted into the concave groove portions 32 formed at both ends of the wood 30, and the wood 30 is dropped along the support column 20. A wood 30 is attached to the column 20. The groove part 32 of the timber 30 is formed at a position spaced away from the center position in the thickness direction of the timber 30 serving as the outer wall surface of the concrete decorative mold 10 to the outer wall surface side (front side). The depth dimension of the concave groove portion 32 (depth dimension from the end surface of the wood 30 to the bottom portion of the groove portion 32) is formed to be greater than the dimension from the surface of the web portion 24 of the support column 20 to the end portion of the flange portion 22. Therefore, it is possible to assemble the support column 20 and the groove portion 32 of the wood 30 in a substantially fitted state. Further, even when there is a gap between the flange portion 22 and the groove portion 32 and the groove portion 32 and the flange portion 22 of the wood 30 are attached in a loosely fitted state, the gap portion is cemented when the concrete is placed. Since it is filled with milk components, there is no particular problem.

  As shown in FIG. 3, the wood 30 attached to the support column 20 is in a state in which both end surfaces of the wood 30 are in contact with the web portions 24 of different support columns 20, and the outer surface of the flange portion 22 (the front side of the outer wall surface). ), The scaffold holder 28 is sandwiched between the end faces of the wood 30. Needless to say, the protruding end portion of the scaffold holding tool 28 (the portion that holds the scaffold member) maintains a state of protruding from the outer wall surface of the wood 30. Thus, since the outer surface (front side) of the flange portion 22 of the support column 20 can be almost entirely covered with the wood 30, the wood 30 has a very good appearance and is in harmony with the surrounding environment. Contribute to.

  Moreover, since the free edge part of the web part 24 protrudes rather than the inner surface (back side) of the timber 30, as shown in FIGS. 1-3, by placing concrete in the concrete decorative mold 10, The web portion 24 can be partially embedded in the concrete. Thereby, the adhesion strength between the support column 20 and the concrete is improved, and the concrete structure 100 and the support column 20 can be reliably integrated.

Next, a concrete structure construction process using the concrete decorative mold described in the present embodiment will be described with reference to the drawings. In the present embodiment, a dam of a so-called restoration mountain dam is assumed as a concrete structure, but the concrete structure 100 according to the present invention is not limited to the restoration mountain dam, and is constructed using a formwork. Of course, it can be applied to any concrete structure.
5 to 9 are a front view and a right side view showing a state in each process in the construction process of the concrete structure using the concrete decorative mold according to the present embodiment. FIG. 10 is a right side view showing a state in which a scaffold is attached to the concrete decorative mold according to the present embodiment.

First, the foundation 70 is constructed at the construction position of the concrete structure 100. Concrete is used for the material of the foundation 70 in the present embodiment. When constructing the base portion 70, as shown in FIG. 5, one end of the support column 20 is previously rooted in the base portion 70 (in some cases up to a supporting ground (not shown)) to a required depth. Next, as shown in FIG. 6, the woods 30 are sequentially placed along the standing direction of the support column 20 in a state where the flange portions 22 are inserted into the groove portions 32 formed at both ends of the support member 30 from the upper end side of the support column 20. The wood 30 is piled up on the upper surface of the foundation part 70 by dropping.
The process shown in FIG. 6 is repeatedly performed, and a plurality of timbers 30 are stacked along the support column 20 to a predetermined height position as shown in FIG. In the case where the support column 20 is extended in the standing direction, since a known connecting member is used, the thickness dimension of the flange portion 22 in the connecting portion may increase. In such a case, the opening size of the groove 32 may be increased by cutting the opening of the concave groove 32 at the assembly site.

After finishing the attachment process of the wood 30 to the support column 20, as shown in FIG. 8, a caulking agent or the like is applied to a portion exposed from between the end faces of the wood 30 on the outer surface (front side) of the flange portion 22 as shown in FIG. The sealing member 40 is applied. By disposing such a sealing member 40, it is possible to prevent the fresh concrete from leaking out from the gap portion between the support column 20 and the wood 30, and it is possible to prevent deterioration of the appearance due to the leaked concrete. .
Moreover, the protrusion part from the inner surface (back side) of the timber 30 of the web part 24 and the anchor 50 previously attached to the base part 70 are connected with the connection tool 52 as needed.

After the concrete decorative mold 10 is reinforced by the anchor 50 and the connecting tool 52, the concrete is placed. The amount of concrete placement is appropriately adjusted according to the strength of the concrete decorative mold 10.
After the concrete cast on the concrete decorative mold 10 is hardened, the concrete surface is washed and additional concrete is cast. The concrete structure 100 is constructed by repeating this and placing concrete to a predetermined height. Normally, the concrete mold is subjected to a demolding process for disassembling the concrete mold after the concrete has hardened. However, in the concrete decorative mold 10 according to the present invention, this demolding process is unnecessary. In other words, the concrete structure 100 in which the concrete decorative form 10 covers the front surface is provided.

  Thus, by covering the front side surface of the concrete structure 100 with the timber 30, it is advantageous in that the appearance of the concrete structure 100 constructed in a mountain such as a restoration dam can be harmonized with the surrounding environment. It is. Further, since the concrete C is placed in a state where the flange portion 22 of the support column 20 is inserted into the concave groove portion 32 formed in the wood 30, the cement milk component of the concrete C is present at the contact portion between the wood 30 and the support column 20. It becomes possible to prevent moisture from entering from the outside. This is also advantageous in that the concrete structure 100 can be maintained in its original appearance for a long period of time.

  Further, depending on the height of the concrete decorative mold 10, it may be necessary to dispose a scaffold 60 as shown in FIG. 10 on the concrete decorative mold 10 in order to ensure the safety of workers. In such a case, the scaffold 60 necessary for work can be constructed by holding the scaffold member 62 on the scaffold holder 28 exposed on the outer surface side of the flange portion 22. As a result, it is not necessary to install a large-scale temporary scaffold called a “vitity scaffold” on the concrete decorative mold 10. That is, the construction cost of the concrete decorative mold 10 and the concrete structure 100 can be reduced, which is convenient.

  As described above, the concrete decorative mold 10 and the concrete structure 100 mounted on the outer surface have been described based on the embodiments. However, the present invention is of course not limited to the above embodiments. . For example, in the present embodiment, as shown in FIG. 8, a sealing member 40 such as a caulking agent is applied to the gap between the end faces of the wood 30 on the outer surface (front side) of the outer wall surface of the concrete decorative mold 10. However, when the fluidity is kept low by the mixing of the concrete C to be placed, the construction of the seal member 40 can be omitted.

  Moreover, in this embodiment, although the timber 30 sawn substantially in a rectangular parallelepiped is used, the timber 30 in which a flat surface is formed only on the thinned timber or the stacked portion, or at least one of the front side and the back side is flat. It is also possible to use wood 30 having a surface formed. Further, the arrangement positions of the concave groove portions 32 at both ends of the wood 30 can be the center position in the thickness direction of the outer wall surface of the wood 30 (the thickness direction of the wood 30).

In addition, as shown in FIGS. 11 and 12, the shape of both ends of the wood 30 in the embodiment described above is more than the groove portion 32 with respect to the end portion position on the concrete placement side (back side) than the groove portion 32. Alternatively, an end surface position on the outer surface side (front side) may be formed so as to protrude (extend) by a half (tw / 2) of the plate thickness dimension tw of the web portion 24.
Such a timber 30 can be employed when using the support column 20 to which the scaffold holder 28 is not attached.

FIG. 12 is a cross-sectional view showing a state when the wood 30 shown in FIG. 11 is attached to the column 20 made of T-shaped steel. If such a timber 30 is used, as shown in FIG. 12, the entire outer wall surface (front side) of the flange portion 22 of the support column 20 can be covered with the timber 30, and the aesthetic appearance of the concrete structure 100 is further enhanced. Can do.
Such a timber 30 is particularly used in the concrete decorative mold 10 for constructing a concrete structure 100 that requires a more beautiful appearance (finished state) such as a retaining wall constructed along a road. It can be used suitably.

  In the present embodiment, the through hole 26 of the web portion 24 is covered with the end face of the wood 30. However, if a part of the through hole 26 is formed so as to protrude from the inner side surface of the wood 30. In addition to being able to reliably fill the through hole 26 with concrete when placing concrete, it is advantageous because the connecting member 52 can be easily and reliably attached.

Furthermore, in this embodiment, although the steel material which has a T-shaped cross section is employ | adopted for the support | pillar 20 used as a vertical material, it is not limited to this. In short, what is necessary is just to have the flange part 22 of the shape standingly provided in the base part 70 and entering the groove part 32 formed in the timber 30, and what is called a H-shaped steel can also be used. When H-shaped steel is used for the support column 20, the weight of the support column 20 increases, but the strength as the support column 20 is improved, and the flange portion enters the concrete placement space. It can be integrated with concrete. In this case, if a through-hole penetrating in the plate thickness direction is provided in the flange portion in the concrete placement space, it is effective in reducing the weight of the column 20, integrating the column 20 and the concrete C, and attaching the connecting material 52. It is.
Furthermore, it is needless to say that the arrangement of the through holes 26 provided in the web portion 24 of the support column 20 can be omitted regardless of the type of steel material used for the support column 20.

DESCRIPTION OF SYMBOLS 10 Concrete decorative form 20 Strut 22 Flange part 24 Web part 26 Through-hole 28 Scaffolding holder 30 Wood 32 End part 34 Groove part 40 Sealing member 50 Anchor 52 Connecting tool 60 Scaffolding 62 Scaffolding member 70 Base part 100 Concrete structure

Claims (7)

A decorative form frame for concrete in which struts having a flange portion and a web portion are erected with a required interval, and wood is disposed between the struts,
At both ends of the wood, a groove portion is formed so that the flange portion can be inserted,
An outer wall surface is formed by stacking a plurality of the timbers along the standing direction of the support column with the flange portion inserted into the groove portion ,
A decorative form frame for concrete, wherein a sealing material is disposed in a portion where the flange portion is exposed from the outer wall surface .   The decorative groove for concrete according to claim 1, wherein the groove is formed at a position spaced from the center position of the wood toward the outer wall surface.   The concrete decorative mold according to claim 1 or 2, wherein a scaffold holder for holding a scaffold member is attached to the flange portion.   The decorative form for concrete according to any one of claims 1 to 3, wherein the wood is thinned wood.   The said support | pillar is steel materials in which the cross-sectional shape in the direction orthogonal to the member extension direction of the said support | pillar was formed in the T shape or the H shape, It is any one of Claims 1-4 characterized by the above-mentioned. Decorative formwork for concrete.   The decorative form frame for concrete according to any one of claims 1 to 5, wherein through holes are formed in the web portion with a required interval. A concrete structure, wherein the concrete decorative frame according to any one of claims 1 to 6 is mounted on an outer surface.