JP2004218275A - Guide for concrete compacting vibrator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely introduce a vibrator to an intended place by a worker when placing concrete. <P>SOLUTION: This guide 10 for the concrete compacting vibrator is fixedly arranged in a reinforcing material when placing the concrete 23 in a state of embedding the reinforcing material such as a reinforcement 24, and introduces the bar-shape or hose type vibrator 25 for compacting the placed concrete 23 to a prescribed position, and has a through-part 11a for penetrating the placed concrete 23 in a side peripheral part, and has an inserting member 11 for inserting and introducing the vibrator 25 to the prescribed position. The vibrator 25 is also surely introduced to an overcrowded bar arrangement place while preventing a hitch on the reinforcement 24 by inserting the inserting member 11. The placed concrete 23 penetrates inside the inserting member 11 from the through-part 11a, and is compacted by the vibrator 25. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a concrete compaction vibrator guide for guiding a bar-shaped vibrator for compacting cast concrete to a predetermined position.
[0002]
[Prior art]
When placing concrete, it is necessary to compact the concrete promptly and sufficiently after placing to ensure that the concrete reaches around the reinforcing material such as a reinforcing bar and the corners of the formwork. Insufficient compaction may result in poorly-formed portions called bean boards, or variations in strength of the concrete skeleton. As a device for performing compaction work, a rod-shaped vibrator is generally used.
[0003]
By the way, in concrete placing in a secondary lining part of a tunnel, an arch part of a bridge, or the like, in those side walls, a vibrator is inserted from an inspection window provided in the side wall part and moved in a vertical direction. Although compaction can be performed relatively easily, the following problems occur between the side wall and the top end. That is, in principle, concrete is poured between the side wall portion and the top end from the casting hole provided at the top end, and compaction is provided at or near the above-mentioned casting hole. It is necessary to perform from the inspection window. In this case, compaction must be performed while the vibrator is moving in the horizontal direction. In some cases.
[0004]
As a method for guiding the vibrator, for example, there are techniques described in Patent Literature 1 and Patent Literature 2 shown below. In the case of a densely arranged reinforcing bar, the vibrating device is prevented while preventing the reinforcing bar from being caught. Is not enough to surely guide the operator to the place intended by the operator.
[0005]
[Patent Document 1]
JP-A-2002-030893 (paragraphs [0009] to [0018])
[Patent Document 2]
JP-A-2000-064615 (paragraphs [0006] to [0014])
[0006]
[Problems to be solved by the invention]
It is an object of the present invention to provide a concrete compaction vibrator guide that enables a vibrator to be reliably guided to a location intended by an operator when placing concrete.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is, for example, as shown in FIGS.
When the concrete 23 is cast in a state in which the reinforcing material (reinforcing bar 24) is buried, a rod-shaped or hose-type vibrator 25 fixed to the reinforcing material (reinforcing bar 24) and compacting the cast concrete 23 is used. A concrete compaction vibrator guide 10 for guiding to a predetermined position,
It is characterized in that it has a penetrating portion 11a on the side peripheral portion through which the cast concrete 23 can penetrate, and is provided with an insertion member 11 for penetrating the vibrator 25 and guiding it to a predetermined position.
[0008]
According to the first aspect of the present invention, a concrete compaction vibrator guide is provided, for example, at a location of densely packed reinforcement before placing concrete, and the vibrator is inserted into the insertion member after placing concrete. The vibrator is reliably guided to the densely arranged bar while preventing the bar from being caught on a reinforcing bar or the like. At this time, the poured concrete penetrates through the penetrating portion formed in the side peripheral portion of the penetrating member into the penetrating member, so that the concrete poured into the densely arranged reinforcing bar is securely compacted by the vibrator. . In other words, it is possible to reliably guide the vibrator to the location intended by the worker when placing concrete.
[0009]
The rod-shaped or hose-type vibrator is a known technique. The hose-type vibrator has a vibrator at the end of the hose, and the length of the hose is set to, for example, 5 m or more.
[0010]
The constituent material of the insertion member is not particularly limited, and any material may be used as long as it does not cause a decrease in strength or the like after concrete casting and has alkali resistance. Specifically, for example, a reinforcing bar (deformed reinforcing bar, round steel) can be used, but an FRP reinforcing material formed by solidifying glass fiber, aramid fiber, carbon fiber, or the like with a resin and forming the same into a string shape may be used. What is necessary is just to form the insertion member by making the above-mentioned rebar or FRP reinforcing material into a spiral shape or a net shape. Further, the insertion member may be formed of plastic, synthetic resin, or the like.
[0011]
The place where the concrete compacting vibrator guide is provided may be provided at a fixed interval, for example, at a place where the reinforcing bars are not tightly packed, in addition to the places where the tight reinforcing bars are provided as described above. As a method of providing a guide for a concrete compacting vibrator, besides a method of binding to a reinforcing material with a wire or a tie wrap band, welding may be used when the reinforcing material is a reinforcing bar and the insertion member is also a reinforcing bar. It is expected that the concrete compaction vibrator guide will improve the strength of the concrete frame.
[0012]
The reinforcing member is generally a reinforcing bar, but is not particularly limited to a reinforcing bar, and may be, for example, a steel frame. Further, carbon fiber, polyvinyl fiber, polypropylene fiber, or the like may be used as a constituent material.
[0013]
According to a second aspect of the present invention, as shown in FIGS. 1 and 2, for example, the concrete compacting vibrator guide 10 according to the first aspect,
The insertion member 11 is formed of a string-shaped member having a predetermined rigidity.
[0014]
According to the second aspect of the present invention, since the insertion member is formed of a string-shaped member having a predetermined rigidity, the concrete compacting vibrator guide is formed relatively easily, inexpensively, and more lightweight. Besides, it is possible to easily set an appropriate size of the penetrating portion corresponding to the fluidity of the concrete.
[0015]
The constituent material of the string-shaped member having a predetermined rigidity and the shape using the same are as described above.
[0016]
The invention according to claim 3 is, for example, as shown in FIG. 1, in the concrete compaction vibrator guide 10 according to claim 1 or 2,
The insertion member 11 is provided with a holding member 11b for holding its outer shape.
[0017]
According to the third aspect of the present invention, the insertion member is prevented from being deformed by the concrete placing pressure or the like by the holding member for holding its outer shape, and the vibrator can be stably inserted. In addition, compaction by a vibrator can be stably performed.
[0018]
As the holding member, for example, a string-shaped member having a predetermined rigidity may be fixed along the axial direction of the insertion member. In this case, the same constituent material as the insertion member or a different constituent material may be used.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a guide for a concrete compaction vibrator according to the present invention will be described in detail with reference to FIGS.
[0020]
A concrete compaction vibrator guide according to the present invention is a rod-shaped vibrator that is fixed to a reinforcing material such as a reinforcing bar when casting concrete in a state where a reinforcing material is buried, and is provided to compact the poured concrete. To a predetermined position. Examples of the reinforcing material include a steel frame in addition to the above-described rebar, and for example, a material including carbon fiber, polyvinyl fiber, polypropylene fiber, or the like may be used.
[0021]
As shown in FIGS. 1A and 1B, a concrete compaction vibrator guide 10 according to the present invention includes a vibrator (for example, FIG. 1) for compacting concrete (for example, concrete 23 shown in FIG. 2). 2 is provided with a penetrating member 11 for penetrating the vibrator 25) and guiding it to a predetermined position, and a penetrating part 11a through which the cast concrete can penetrate is formed on a side peripheral portion of the penetrating member 11. I have. In addition, the vibrator 25 shown in FIG. 2 is of a rod shape or a hose type, and is a known technique. As shown in FIG. 1 (a), the insertion member 11 is formed by forming a reinforcing bar (deformed reinforcing bar, round steel), a glass fiber, an aramid fiber, an FRP reinforcing material obtained by solidifying carbon fiber or the like with a resin, and the like, as shown in FIG. , As shown in FIG. 1 (b).
[0022]
As described above, the penetration portion 11 a is formed on the side peripheral portion of the insertion member 11 through which the cast concrete can penetrate by being formed in a spiral shape or a net shape. The poured concrete enters the inside of the insertion member 11 from the through portion 11a, and is compacted by a vibrator penetrating the inside of the insertion member 11. In addition, the shape of the insertion member 11 made of a string-shaped member is not particularly limited to a spiral shape or a mesh-like shape. It may be formed in a shape.
[0023]
Further, a holding member 11b for holding the outer shape is fixed to the side peripheral portion of the insertion member 11 along the axial direction. The constituent material of the holding member 11b may be the same as or different from that of the insertion member 11. As a method of fixing the insertion member 11 and the holding member 11b, binding may be performed by a number line or the like, or when both the insertion member 11 and the holding member 11b are rebars, welding may be performed.
[0024]
The place where the guide 10 for concrete compaction vibrator is provided is generally a place where the reinforcing bars are densely arranged, but is not particularly limited. Good.
[0025]
FIG. 2 shows an example in which the concrete compaction vibrator guide 10 according to the present invention is disposed in a secondary lining portion 20 of a tunnel. As shown in FIG. 2, the concrete 23 of the secondary lining portion 20 of the tunnel is cast by the segment 21 provided on the inner peripheral surface of the tunnel at the time of the primary lining and the inside of the tunnel along the axial direction. And the center 22 movably installed. In addition, in FIG. 2, reference numeral 24 denotes a reinforcing bar arranged, and reference numeral 25 denotes a vibrator.
[0026]
In the secondary lining portion 20 of the tunnel, the concrete is poured between the side wall portion 20a and the top end portion 20b in principle from a not-shown setting hole provided in the top end portion 20b. Therefore, it is necessary to perform compaction from the casting hole or an inspection window provided in the vicinity thereof. In this case, the compaction needs to be performed while the vibrator 25 is being moved in the lateral direction. In the related art, especially in a case where the reinforcing bars are densely arranged, the reinforcing bars 24 and the like obstruct the operation. In some cases, it was difficult to reliably guide the vibrator to the location.
[0027]
Even when the concrete 23 is poured between the side wall portion 20a and the top end portion 20b as described above, the concrete compacting vibrator guide 10 according to the present invention is used as shown in FIGS. As shown in the drawing, by providing the vibrator 25 between the side wall portion 20a and the top end portion 20b along the circumferential direction of the tunnel, it is possible to reliably guide the vibrator 25 to a position intended by the operator.
[0028]
As shown in FIG. 2A, a concrete compaction vibrator guide 10 may be provided along the axial direction of the tunnel at the top end 20b of the secondary lining portion 20 of the tunnel.
[0029]
According to the present embodiment, the following effects can be obtained.
[1] The concrete compaction vibrator guide 10 is provided, for example, at a location of overcrowding before placing the concrete 23, and the vibrator 25 is inserted through the insertion member 11 after the concrete 23 is placed. The vibrator 25 is surely guided to the densely arranged bar while preventing the bar from catching on the reinforcing bar 24 or the like. At this time, the poured concrete 23 penetrates into the insertion member 11 from the penetrating portion 11a formed on the side peripheral portion of the insertion member 11, so that the concrete 23 that has been poured into the densely arranged reinforcing bars is vibrated by the vibrator 25. Is firmly compacted. That is, when the concrete 23 is poured, the vibrator 25 can be reliably guided to a location intended by the operator.
[0030]
[2] Since the insertion member 11 is formed of a string-shaped member having a predetermined rigidity, the concrete compacting vibrator guide 10 can be formed relatively easily, inexpensively, and further lightly. An appropriate size of the penetrating portion 11a corresponding to the fluidity or the like can be easily set.
[0031]
[3] The insertion member 11 is prevented from being deformed by the placing pressure of the concrete 23 or the like by the holding member 11b for holding its outer shape, and the vibrator 25 can be stably inserted. Can be performed stably.
[0032]
【The invention's effect】
According to the first aspect of the present invention, a concrete compaction vibrator guide is provided before concrete placement, for example, at a location of overcrowding, and the vibrator is inserted through the insertion member after concrete placement. The vibrator is reliably guided to the densely arranged bar while preventing the bar from being caught on a reinforcing bar or the like. At this time, since the poured concrete penetrates through the penetrating portion formed on the side peripheral portion of the penetrating member and into the penetrating member, the concrete poured into the densely reinforced arrangement is securely compacted by the vibrator. . That is, it is possible to reliably guide the vibrator to a location intended by the worker when placing concrete.
[0033]
According to the second aspect of the invention, it is needless to say that the same effect as that of the first aspect is obtained, and the insertion member is formed of a string-shaped member having a predetermined rigidity. In addition, the guide for the concrete compacting vibrator can be formed relatively easily, inexpensively, and more lightweight, and the size of the appropriate penetration portion corresponding to the fluidity of the concrete can be easily set.
[0034]
According to the third aspect of the present invention, the same effects as those of the first or second aspect can be obtained, and the insertion member can be formed by pressing the concrete by the holding member for holding the outer shape. Deformation due to installation pressure or the like is prevented, the vibrator can be stably inserted, and compaction by the vibrator can be performed stably.
[Brief description of the drawings]
FIGS. 1A and 1B are cross-sectional views showing an example of a concrete vibrator guide according to the present invention.
FIG. 2A is a sectional view showing a secondary lining portion of a tunnel in which concrete is cast using the guide for a concrete vibrator according to the present invention, and FIG. 2B is a sectional view of FIG. It is AA sectional drawing in.
[Explanation of symbols]
10 Guide for concrete compacting vibrator 11 Inserting member 11a Penetrating portion 11b Holding member 23 Concrete 24 Reinforcing bar (reinforcing material)
25 vibrator

Claims (3)

When compacting concrete in a state in which the reinforcing material is buried, concrete compaction vibration is provided fixed to the reinforcing material to guide a rod-shaped or hose-type vibrator that compacts the poured concrete to a predetermined position. Machine guide,
A guide for a concrete compacting vibrator, characterized in that it has a penetrating portion on the side peripheral portion through which the cast concrete can penetrate, and an insertion member for penetrating the vibrating machine and guiding it to a predetermined position. The guide for a concrete compaction vibrator according to claim 1, wherein the insertion member is formed of a string-shaped member having a predetermined rigidity. The guide for a concrete compacting vibrator according to claim 1, wherein the insertion member is provided with a holding member for holding an outer shape thereof.

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