JP3748781B2 - Embedded formwork apparatus and construction method using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an embedded formwork device used when constructing a concrete structure such as a retaining wall and a construction method using the same.
[0002]
[Prior art]
Conventionally, when constructing a concrete structure such as a retaining wall, a plywood formwork panel is often used. This plywood formwork panel is a formwork panel made by reinforcing a pier to the plywood, and when constructing a concrete structure using this, first, prepare a plurality of plywood formwork panels, These are reinforced using a single pipe or the like, assembled into a shape that matches the concrete structure, and a formwork device is produced. Next, a concrete material is placed in the interior space of the formwork apparatus, and the plywood formwork panel is disassembled after the concrete is hardened. And the concrete surface after hardening is exposed and it is set as the surface of a concrete structure. In this construction method, the disassembled plywood form panel is used again at another site.
[0003]
However, in recent years, compared to the case of using a plywood formwork panel, the construction period can be shortened because dismantling work is not required. Therefore, embedding using a concrete board (surface board) instead of a plywood formwork panel is possible. It is practiced to use a formwork (a formwork in which the formwork is not dismantled after the concrete is hardened but is left as it is integrated with the hardened concrete as it is). For example, FIG. 6 shows a part of a mold apparatus manufactured using an embedded mold 31 in which a steel shaped steel 31b is fixed to a concrete plate 31a. In this mold apparatus, metal bases 33a, 32b and the like attached to a steel section 31b of a large number of embedded molds 31 (only six embedded molds 31 are shown in FIG. 6) are used as concrete foundations 33. It is connected and fixed to tightly bound objects 34a to 34d such as steel frames and reinforcing bars, and a concrete material is placed on the inner portion 35 of each embedded mold 31.
[0004]
[Problems to be solved by the invention]
However, the above-mentioned formwork apparatus is configured to attach the respective embedded formwork 31 by fastening the metal fittings 32a, 32b and the like of the respective embedded formwork 31 to the tightly attached objects 34a to 34d of the concrete structure. Each embedded mold 31 is integrated with the surface of the concrete structure because it is difficult to bond each embedded mold 31 and the concrete surface during the curing. Absent. For this reason, when an earthquake or the like occurs and the concrete structure vibrates, the vibration or the like is directly transmitted to the respective embedded molds 31 via the above-described binding objects 34a to 34d and the metal fittings 32a and 32b. The concrete plate 31a of the frame 31 is damaged early. Further, when the concrete structure is displaced due to vibration such as an earthquake, the above-mentioned binding materials 34a to 34d are also pulled in that direction, so that the concrete plate 31a tightly coupled with this is distorted, cracked, damaged, etc. Or Further, if the above-mentioned tying materials 34a to 34d are damaged or cut, the concrete board 31a may fall.
[0005]
The present invention has been made in view of such circumstances, and the concrete plate is not damaged early due to vibrations such as earthquakes, and the concrete plate is distorted, cracked, broken, etc. It is an object of the present invention to provide an embedded formwork apparatus and a construction method using the embedded formwork apparatus in which a concrete plate does not fall.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides an embedded formwork apparatus used for producing a concrete structure, and is provided with an embedded surface form made of a concrete plate and a predetermined interval from the embedded surface formwork. An embedded surface formwork comprising a concrete plate is provided with a buried formwork apparatus having a buried backside formwork and a connecting means for connecting the two formwork, wherein the connecting means is provided with a buffer portion. A gap formed between the buried surface mold and the buried back mold by connecting the buried surface mold and the buried back mold arranged at a predetermined interval by a coupling means provided with a buffer portion. A construction method in which the both molds are integrated into the concrete structure by closing the both side surfaces and bottom surface of the steel sheet and placing the concrete material in the gap and curing the concrete material in the state is described as the second gist. To do.
[0007]
That is, the embedded formwork apparatus of the present invention is an embedded formwork apparatus used for producing a concrete structure, and is provided with an embedded surface form made of a concrete plate and a predetermined distance from the embedded surface formwork. And a connecting means for connecting both molds. And the buffer means is provided in the said connection means. Therefore, even if an earthquake or the like occurs and the concrete structure vibrates, the vibration is absorbed by the buffer provided in the connecting means when the vibration is transmitted to the embedded surface formwork through the connecting means. Therefore, the concrete plate of the buried surface formwork is not damaged over a long period of time. Moreover, even if the concrete structure is displaced due to earthquakes or the like and the connecting means is pulled in that direction, the tensile force can be relaxed by the buffer portion, and the concrete plate is distorted. No cracks, breakage, etc. In addition, since the vibration such as an earthquake can be absorbed by the buffer portion, the connecting means is not damaged or cut, and there is no possibility that the concrete plate will fall off the concrete structure. Moreover, the construction method of this invention can produce a concrete structure using said outstanding embedding formwork apparatus.
[0008]
In the present invention, the connection means includes a first connection fixture fixed to the embedded surface mold, a second connection fixture fixed to the embedded back surface mold, and a buffer portion connecting the both connection fixtures. When the embedded back form frame vibrates due to vibrations such as an earthquake, the vibration of the embedded back form frame is absorbed by the buffer and hardly transmitted to the embedded surface form frame.
[0009]
In the present invention, when the buffer portion is a vibration-proof rubber, it is durable by using a hard vibration-proof rubber used for automobiles, civil engineering and buildings (for example, bridges, seismic isolation etc.). Even if the concrete material is placed, the buffer portion is not damaged.
[0010]
Next, the present invention will be described in detail.
[0011]
The embedded mold apparatus of the present invention includes an embedded surface mold made of concrete plate, an embedded back mold, and a connecting means, and a buffer portion is provided in the connecting means.
[0012]
As said concrete board, what has various uneven | corrugated patterns (for example, natural stone pattern) formed in the surface can be used.
[0013]
As the buried surface mold, various buried molds provided with the concrete plate are used. For example, a concrete plate containing a steel shape steel and an expanded metal (rust-prevented) is suitable. Used for. Moreover, the said embedded surface formwork may be comprised only with the said concrete board.
[0014]
Various embedded molds are used as the embedded back formwork. For example, an embedded formwork in which a metal mesh, punching metal, or the like is attached to a frame formed by assembling vertical bars and horizontal bars made of channels or the like in a grid pattern. Etc. Moreover, you may make it attach the decorative board (concrete board etc.) in which the uneven | corrugated pattern was formed in the surface to the said embedded back formwork. In this case, it is possible to form uneven patterns on both the front and back surfaces of the concrete structure.
[0015]
As the connection means, various connection means such as bolts, nuts, reinforcing bars, and the like are used. In addition, the buffer section may be anything as long as it can absorb various types of vibrations such as earthquakes, and can be used for automobiles, civil engineering, buildings (for example, bridges, residential seismic isolation, etc.), etc. The hard vibration-proof rubber used and vibration-proof rubber made of NR, EPDM, CR, etc. are preferably used.
[0016]
In addition to the buried surface mold and the buried back mold, the buried mold apparatus of the present invention closes any one of the bottom surface and both sides of the gap sandwiched between the buried surface mold and the buried back mold. Therefore, any one of an embedded bottom surface formwork and an embedded side surface formwork may be provided. Moreover, when the said bottom face and both side surfaces are obstruct | occluded with concrete etc., it is not necessary to provide a buried bottom face formwork and a buried side face formwork. Further, in the construction method of the present invention, when any one of the bottom surface and both side surfaces of the gap is open, either one of the bottom surface or both side surfaces is closed, and in that state, the concrete is put into the gap. Placing material. In addition, in the case where any one of the foundation made of concrete and the side wall is formed in the part corresponding to any one of the bottom surface and both side surfaces, the embedded surface formwork and the embedded back formwork are assembled, Since the bottom surface and both side surfaces are closed, concrete material is placed in the gap in that state. The construction method of the present invention includes such a case.
[0017]
Next, embodiments of the present invention will be described with reference to the drawings.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory view showing an embodiment of an embedded formwork apparatus of the present invention. In this embodiment, the embedded formwork apparatus of the present invention is assembled in a predetermined portion such as a hillside 1 (for example, a space formed by excavating a portion such as a hillside 1 facing a road). 1 (only one is shown in FIG. 1) and a plurality of embedded surface molds 2 arranged at a predetermined interval from the embedded surface mold 2 (only one is shown in FIG. 1). ) Embedded backside mold 3 and a large number (only two are shown in FIG. 1) of connecting means 4 for connecting both molds 2 and 3. In the figure, reference numeral 5 denotes a backfilling chestnut placed between the excavation surface 1 a of the mountainside 1 and the buried back formwork 3.
[0019]
The embedded surface mold 2 is made of a concrete plate 10 having a surface 10a formed on a decorative surface such as a concavo-convex pattern, and at a predetermined position (a position corresponding to a screw rod insertion hole 15a of a vertical reinforcing bar 15 described later), Each of the through holes 11 (see FIG. 2) is formed. Each of these through-holes 11 includes a large-diameter round hole 11a that can accommodate a head 20a of a mounting screw 20 to be described later, a small-diameter round hole 11b through which a screw portion 20b of the mounting screw 20 can be inserted, and a fastening bracket 25 that will be described later. (See FIGS. 2 and 4), which are arranged in series from the surface 10a side of the concrete plate 10 in this order. The embedded surface mold 2 has an upper ridge 12 projecting from the upper side thereof, and a lower ridge 13 detachably fitted to the back side of the upper ridge 12 from the lower side when assembled. Projected.
[0020]
As shown in FIG. 3, the embedded back formwork 3 includes a vertical reinforcing bar 15 made up of a large number of U-shaped vertical channels (only two are shown in FIG. 3) and a large number (in FIG. 3). A plurality of sheets (only two are shown) which are welded and fixed to the horizontal reinforcing bars 16 formed of U-shaped horizontal channels, the back surface 15b of each vertical reinforcing bar 15 and the surface 16a of each horizontal reinforcing bar 16 ( In FIG. 3, only one sheet of wire mesh 17, a plurality of mounting bolts 18 and mounting nuts 19 (not shown in FIG. 3) for fixing the vertical reinforcing bars 15 and the horizontal reinforcing bars 16 are provided. 4), and a screw rod insertion hole 15a (see FIG. 4) for inserting a screw rod 26, which will be described later, is drilled at a predetermined position of each vertical reinforcing bar 15. Each wire mesh 17 acts to block the flow of the concrete material to the outside.
[0021]
As shown in FIG. 4, the connecting means 4 includes a mounting screw (first connecting fixture) 20, a connecting tool 21, and two mounting nuts (second connecting fixture) 22. Further, as shown in FIG. 5, the connector 21 includes a hard vibration-proof rubber (buffer part) 23 vulcanized and formed into a cylindrical shape (this hard vibration-proof rubber 23 is used for automobiles, civil engineering / buildings [ A pair of stainless steel circles integrated with both ends of the anti-vibration rubber 23 with an adhesive (or during vulcanization molding). A plate 24, a hexagonal fastening bracket 25 whose one side is welded and fixed to one stainless steel disc 24, and a stainless steel disc 24 which is welded and fixed along the axial direction of the vibration isolating rubber 23. The mounting screw 20 fits into a screw hole 25a formed along the axial direction of the anti-vibration rubber 23 from the other side surface of the fastening bracket 25, and the screw rod 26 Both mounting nuts 22 are mated. Then, in a state where the fastening metal fitting 25 is inserted into the hexagonal hole 11c of the concrete plate 10 of the embedded surface mold 2, the screw portion 20b of the mounting screw 20 inserted from the large-diameter round hole 11a side of the concrete plate 10 and the fastening are tightened. The connecting means 4 is fixed to the embedded surface mold 2 by being engaged with the screw holes 25 a of the metal fitting 25. In addition, the screw rod 26 is inserted into the screw rod insertion hole 15a of the vertical reinforcing bar 15 of the embedded back mold 3 and is engaged with the two mounting nuts 22 so that the embedded back mold 3, the connecting means 4 is fixed.
[0022]
In the above configuration, when constructing a concrete structure such as a retaining wall, first, a predetermined portion such as the mountainside 1 is excavated, and a plurality of embedded surface molds 2 and embedded in a space formed by the excavation or the like. The back mold 3 is disposed at a predetermined interval. In this operation, both the molds 2 and 3 are connected by a large number of connecting means 4. At this time, for example, in the state where the fastening bracket 25 of the connecting means 4 is accommodated in the hexagonal hole 11c of the concrete plate 10 and the screw rod 26 of the connecting means 4 is inserted into the screw rod insertion hole 15a of the vertical reinforcing bar 15, After both the molds 2 and 3 are arranged at predetermined positions, the connecting means 4 is fixed to the two molds 2 and 3 with mounting screws 20 and two mounting nuts 22. Next, the side surface and bottom surface of the space (gap) formed between each of the embedded surface molds 2 and each of the embedded back surface molds 3 are closed with the embedded side surface molds and the embedded bottom surface molds (both not shown). To do. At this time, when a concrete foundation is formed on the bottom surface of the space, the buried bottom formwork can be omitted. In this way, an embedded formwork apparatus is formed. Next, the backfilling chestnut 5 is inserted between the excavation surface 1 a of the mountainside 1 and the buried back formwork 3. After that, a concrete structure in which both the molds 2 and 3 are integrated can be produced by placing a concrete material inside the embedded mold apparatus and curing it.
[0023]
Thus, in the above embodiment, since the vibration isolating rubber 23 is provided in the connecting means 4, even if an earthquake or the like occurs, the vibration or the like can be absorbed by the vibration isolating rubber 23, and the embedded surface The concrete plate 10 of the mold 2 is not damaged early. Further, the concrete plate 10 is not distorted, cracked, damaged, or the like, and the connecting means 4 is not damaged or cut.
[0024]
In the above embodiment, a plurality of embedded surface molds 2 and a plurality of embedded back molds 3 are used, but one embedded surface mold 2 and one embedded back mold 3 are used. May be. Further, one wire mesh 17 may be used. Moreover, in the said embodiment, it may replace with the metal net | network 17 of the embedment back formwork 3, and may use a punching metal.
[0025]
【The invention's effect】
As described above, according to the embedded formwork apparatus of the present invention, even if an earthquake or the like occurs and the concrete structure vibrates, this vibration or the like is transmitted to the embedded surface formwork through the connecting means. When absorbed, it is absorbed by the buffer provided in the connecting means, and the concrete plate of the buried surface formwork is not damaged for a long period of time. Moreover, even if the concrete structure is displaced due to earthquakes or the like and the connecting means is pulled in that direction, the tensile force can be relaxed by the buffer portion, and the concrete plate is distorted. No cracks, breakage, etc. In addition, since the vibration such as an earthquake can be absorbed by the buffer portion, the connecting means is not damaged or cut, and there is no possibility that the concrete plate will fall off the concrete structure. Moreover, the construction method of this invention can produce a concrete structure using said outstanding embedding formwork apparatus.
[0026]
In the present invention, the connection means includes a first connection fixture fixed to the embedded surface mold, a second connection fixture fixed to the embedded back surface mold, and a buffer portion connecting the both connection fixtures. When the embedded back form frame vibrates due to vibrations such as an earthquake, the vibration of the embedded back form frame is absorbed by the buffer and hardly transmitted to the embedded surface form frame.
[0027]
In the present invention, when the buffer portion is a vibration-proof rubber, it is durable by using a hard vibration-proof rubber used for automobiles, civil engineering and buildings (for example, bridges, seismic isolation etc.). Improved, and even if concrete material is placed, it will not be damaged.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an embodiment of an embedded formwork apparatus of the present invention.
FIG. 2 is an explanatory view showing the surface of a concrete board.
FIG. 3 is a perspective view showing a part of a buried back formwork.
FIG. 4 is a cross-sectional view showing a main part of the embedded formwork apparatus.
FIG. 5 is a cross-sectional view of a connector.
FIG. 6 is a perspective view showing a conventional example.
[Explanation of symbols]
2 Embedded surface form 3 Embedded back form 4 Connection means 10 Concrete plate 23 Anti-vibration rubber

Claims (4)

An embedded formwork apparatus used for producing a concrete structure, which is an embedded surface formwork made of a concrete plate, an embedded back formwork disposed at a predetermined interval from the embedded surface formwork, and both formwork And a connecting means for connecting the connecting means, and a buffer portion is provided in the connecting means. The said connection means consists of the 1st connection fixing tool fixed to an embedded surface formwork, the 2nd connection fixing tool fixed to an embedded back surface moldwork, and the buffer part which connects both these connection fixing tools. The embedded formwork apparatus according to 1. The embedded mold apparatus according to claim 1, wherein the buffer portion is an anti-vibration rubber. An embedded surface mold made of concrete plate and an embedded back mold that is arranged at a predetermined interval from the embedded surface mold are connected by a connecting means provided with a buffer, and embedded with the embedded surface mold. Both sides and bottom of the gap formed between the back molds are closed, and in this state, concrete material is placed in the gap and cured, so that the two molds are integrated with the concrete structure. A construction method characterized by that.

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