JP2006299570A - Vibrator for compacting concrete, and compaction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the quality of concrete by simplifying compaction work during the placing of the concrete and repeatedly compacting the concrete. <P>SOLUTION: A continuous vibrator 1 comprises: a plurality of vibrator bodies 4 which are applied to the compaction of the concrete supplied, for example, to a section between a wall surface of a tunnel and a tunnel form, and which are serially arranged at predetermined intervals, and each leading end of which has a vibrating part 4a; and an electric wire 5 which is connected to a back end 4b of each of the vibrator bodies 4, so as to supply electricity. A connecting member 6, which is composed of a steel pipe etc. elongated to serially support the respective vibrator bodies 4, is provided, and the electric wire 5 is arranged inside the connecting member 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vibrator for compaction and a compaction method in a tunnel form used for tunnel lining, for example.

Generally, it is known that a vibrator is used for compacting concrete. The same applies to concrete placement in tunnel lining. Normally, in tunnel lining, a tunnel form having a form body that is curved in a shape along the finished surface of the lining is used, and concrete is cast while being sequentially moved in the tunnel traveling direction. Here, a placement region is formed between the mold body and the tunnel wall surface. When this placement region is roughly divided, a top end region, a shoulder region, and a sidewall region are formed in order from the top to the bottom.
As concrete compaction methods using tunnel formwork, a rod-like vibrator is inserted directly into the concrete from the placement port and compacted, and a formwork vibrator attached to the inside of the formwork body is passed through the formwork body. It is common to apply vibration to concrete.
Usually, the shoulder region and the side wall region are compacted using a rod-like vibrator. In the case of compaction by this rod-shaped vibrator, there is a reinforcing bar in the placement area, and the work of inserting and pulling out the rod-shaped vibrator into the concrete is troublesome for the worker.
On the other hand, a mold vibrator is often used in the top end region because the work is upward and the workability is poor. This compaction by the formwork vibrator has a vibration effect only on the surface portion of the placed concrete, so that the whole concrete cannot be compacted. Further, in the top end region, the concrete is pushed up from the placement opening, and becomes a mountain in the vicinity of the placement opening. For this reason, if the compaction is insufficient, there is a problem in that the quality of the concrete is deteriorated, for example, a gap is formed between the tunnel wall surface and the concrete, or the supplied concrete causes material separation.
In concrete placement using such a tunnel formwork, a technique for improving the quality by improving the efficiency of compaction work has been proposed in, for example, the following patent documents.
Japanese Patent Laid-Open No. 2004-260688 incorporates a position detection sensor in a vibrating portion of a rod-like vibrator (hereinafter referred to as a vibrator), controls the position information of the vibrator, and compacts it at an appropriate concrete supply position. This is a method of compacting a vibrator inserted into the concrete below from a placement opening provided in the automatic winding reel while being pulled out by an automatic take-up reel. According to this method, there is an advantage that the vibrator can be inserted at an appropriate compaction position. However, since the range of automatic tightening while pulling out is only the range below the placement port where the vibrator is inserted, it is necessary to manually perform the work of moving the vibrator in the tunnel traveling direction, which is troublesome. was there.
Patent Document 2 is a technique that solves the problems of Patent Document 1, and is previously provided with guide means for guiding a vibrator in a traveling direction of the tunnel, for example, in the tunneling direction, and the vibrator is installed on the existing lining side of the guide means. It is attached so that it can be moved. Then, during placement, the vibrator is vibrated only at the position where the vibrator is disposed, and after the placement of concrete is finished, the vibrator is pulled out toward the wife side and compacted.
JP 2001-227165 A JP 2000-356099 A

However, according to the concrete compaction method in the conventional tunnel form as described above, there are the following problems.
According to the above-mentioned Patent Document 1, if the concrete is filled up to a position where the placement port is located, it is difficult to repeatedly compact the filled concrete because the vibrator cannot be inserted using the placement port. Met.
Further, in Patent Document 2, the vibrator once pulled out cannot be set again, so that only a partial portion where the vibrator is disposed can be compacted when placing concrete. Furthermore, there has been a problem that after the vibrator is pulled out, it cannot be repeatedly compacted.
As described above, in Patent Documents 1 and 2, there is a problem that the quality of the concrete is deteriorated in places where repeated compaction is required, such as the top end region.

  The present invention has been made in view of the above-mentioned problems, and provides a vibrator for compaction and a compaction method for simplifying compaction during placing and improving the quality of concrete by repeatedly compacting. The purpose is to provide.

In order to achieve the above object, in the vibrator for concrete compaction according to the present invention, a vibrator including a vibrator main body having a vibration part that vibrates the concrete, a plurality of vibrator main bodies are arranged in series at predetermined intervals, and connected. The vibrator main bodies are connected and integrated by means.
In the present invention, since a plurality of vibrator main bodies are integrated, a plurality of vibrator main bodies can be arranged at a predetermined placement location. For this reason, during the placement of the concrete, the entire concrete can be compacted without moving the vibrator body in a fixed state. And, since the concrete can be repeatedly compacted many times during the placement of the concrete, it is possible to prevent the formation of voids formed on the back surface of the lining, and to prevent the separation of the concrete material, thereby improving the quality of the concrete. .
Further, there is no labor for moving the vibrator in the direction of travel of the tunnel as in the prior art, labor saving of the compacting work is achieved, and work efficiency can be improved.

Moreover, in the concrete compaction vibrator according to the present invention, the connecting means is preferably extended so as to be substantially parallel to the vibrator main body arranged in series.
In the present invention, the vibrator main bodies are arranged in a predetermined series and can be moved smoothly in the concrete, so that work efficiency can be improved.

In the concrete compacting vibrator according to the present invention, it is preferable that an electric wire for supplying power to each of the vibrator main bodies is wired inside the connecting means.
In the present invention, since the electric wires of the plurality of vibrator main bodies are housed in the connecting means, it is possible to work without tangling the electric wires during compaction.

The concrete compaction vibrator according to the present invention is preferably provided with a protective member.
In the present invention, by providing a protective member excluding at least a vibration part on the outer periphery of a plurality of connected vibrator main bodies, when inserted into concrete and moved, it is caught by a reinforcing bar or the like disposed in the placement area. You can move without

Further, the compacting method according to the present invention includes arranging a plurality of vibrator bodies having vibration portions in a predetermined placement area in advance at a predetermined interval before placing concrete, and vibrating the vibrator body during concrete placing. The concrete is compacted, and the vibrator main body is moved from the placement area after placing the concrete.
In the present invention, the vibrator can be repeatedly compacted any number of times when placing the concrete at the place where the vibrator is disposed. Moreover, during placement, the vibrator body can be fixed and compacted without moving, so there is no need to pull out or push in the vibrator corresponding to the concrete position supplied as in the past, and compaction work can be performed. Labor saving is achieved and work efficiency can be improved.

  According to the concrete compacting vibrator and the placing method of the present invention, since a plurality of vibrator bodies are integrated, a plurality of vibrator bodies can be arranged at predetermined placement locations. For this reason, during the placement of the concrete, the entire concrete can be compacted without moving in a state where the vibrator main body is fixed. And, since the concrete can be repeatedly compacted many times during the placement of the concrete, it is possible to prevent the formation of voids formed on the back surface of the lining, prevent the separation of the concrete material, and improve the quality of the concrete. .

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
1A and 1B are diagrams showing a continuous vibrator according to an embodiment, wherein FIG. 1A is a side sectional view thereof, FIG. 1B is a sectional view taken along line AA shown in FIG. 1A, and FIG. 3 is a plan view showing the installation state of the continuous vibrator, FIG. 4 is a cross-sectional view showing the installation state of the continuous vibrator, and FIGS. 5A to 5D show the installation state using the continuous vibrator. FIG.

  A continuous vibrator 1 for concrete compaction according to the present embodiment uses a tunnel form 2 (see FIG. 4), for example, in tunnel lining constructed by the NATM method, and a tunnel wall 3 and a tunnel form 2 It is applied to compaction of the concrete supplied to the placing area R formed between the two.

  As shown in FIG. 1 (a), the continuous vibrator 1 includes a plurality of vibrator bodies 4 having vibrating portions 4a, electric wires 5 connected to the rear end portions 4b of the vibrator bodies 4 and supplying electricity, It is schematically configured from a connecting member 6 (connecting means) extending so as to connect the vibrator body 4 in series at a predetermined interval.

The continuous vibrator 1 applies vibration to surrounding concrete by rotating an eccentric rotating body (not shown) in the vibration part 4a of each vibrator body 4 or the like. In the present embodiment, the number of vibrator bodies 4 is four, but the number is not necessarily limited to this number. It is sufficient that there are at least two or more units, and it is preferable to set the number according to the use conditions.
As shown in FIG. 1 (a), each vibrator main body 4 is disposed and integrated with a predetermined interval D so as to be substantially parallel to the connecting member 6, and therefore each vibrator main body 4 is separated. There is no. For this reason, it can move smoothly in the concrete and work efficiency can be improved. Note that the predetermined distance D is obtained in advance so as to grasp the compaction influence range in which each vibrator body 4 can vibrate the surrounding concrete, so that at least the placement region R falls within this compaction influence range. In addition, it is preferable to arrange a plurality of vibrator bodies 4.
Further, the vibrator main body 4 can be vibrated simultaneously or individually by a hand switch (not shown) or the like.

The connecting member 6 shown in FIG. 1 preferably has some flexibility. For example, a reinforcing member such as a steel material is arranged in an extending direction or an extending direction spiral shape on the outer side of the electric wire 5 and the outer side is made of rubber or the like. There can be considered one having some flexibility formed by coating with resin, one in which the electric wire 5 is arranged inside, and a steel pipe having the length of each vibrator is connected by a bendable joint.
As shown in FIGS. 1A and 1B, the connecting member 6 according to the present embodiment branches at a position where each vibrator main body 4 is arranged, and is liquid-tight on the outer periphery of the rear end portion 4b of the vibrator main body 4. It is fixed to.
And the electric wire 5 connected to the rear-end part 4b of each vibrator main body 4 is wired in the connection member 6 via this branch location, and is connected with the power supply (illustration omitted).
As shown in FIG. 1A, the length of the connecting member 6 only needs to be long enough to support a plurality of vibrator bodies 4 in series, and the end of the connecting member 6 is flexible such as rubber. It is connected to a hose 7 made of a member or the like, and the electric wire 5 is also wired in the hose 7 from the straight line portion. By setting it as such wiring, when moving the continuous vibrator 1 within concrete, the electric wires 5 are not entangled. In addition, it is preferable that this hose 7 arrange | positions the intensity | strength which can endure the tensile force at the time of pulling out the vibrator main body 4 after completion of placement, for example, a reinforcing material.

Further, as shown in FIGS. 1A and 1B, a protective member 8 is provided on the substantially outer periphery of the continuous vibrator 1. The protective member 8 is made of, for example, a material such as a thin steel plate, and an opening K is formed so that the vibration portion 4a of the vibrator body 4 can be brought into contact with the surrounding concrete to give vibration. In addition, it is preferable that the shape of the protection member 8 is such that the outer peripheral surface of the protection member 8 is as uneven as possible.
By providing such a protective member 8, it is possible to prevent the continuous vibrator 1 from being caught by a reinforcing bar (not shown) disposed in the placement region R when the continuous vibrator 1 is moved in the concrete.

Next, the operation of the continuous vibrator 1 having such a configuration and the concrete compaction method using the same will be described.
First, in the following description, the left-right direction shown in FIG. 2 is the tunnel traveling direction, the left side in FIG. 2 is the “lining side”, and the right side in FIG. 2 is the “wife side”. Further, the left side of the mold body 2a in FIG. 2 is a lining side end 2b, and the right side is a wife side end 2c.

  As shown in FIG. 2, the tunnel mold 2 has a lining side end 2 b of the mold body 2 a adjacent to the end surface 11 a of the existing lining 11, and an outer peripheral surface of the mold body 2 a on the lining finish surface 12. Are placed so as to coincide with each other to form a placement region R. The tunnel mold 2 is provided with a wife mold 9 that closes an opening formed at the end of the casting region R on the wife side.

The installation of the continuous vibrator 1 in the present embodiment is intended for the top end region R1 in which it is conventionally difficult to compact concrete (see FIG. 4).
As shown in FIG. 2, in the top end region R <b> 1, guide means 10 made of, for example, a wire for extending the continuous vibrator 1 in the tunnel traveling direction is extended at a position slightly away from the tunnel wall surface 3. Yes. One end 10a of the guide means 10 is provided so as to be connected to or close to the lining end surface 11a, and the other end 10b penetrates the end frame 9 and is locked to the tunnel wall surface 3 or the like at an arbitrary position.

As shown in FIG. 2, the suspension means 13 is provided on the guide means 10 so as to be movable at predetermined intervals, and the continuous vibrator 1 with each vibrator body 4 facing upward is fixed to the suspension 13. Thus, the continuous vibrator 1 is suspended along the guide means 10. At this time, the vibrator body 4 at the extreme end of the continuous vibrator 1 is disposed at a position close to the lining end surface 11a.
As shown in FIGS. 2 and 3, the wife side of the connecting member 6 penetrates the wife mold 9 almost liquid-tightly (see FIG. 2).
As shown in FIGS. 2 and 4, the tunnel mold 2 is provided with a gantry 14 that supports the mold body 2a from the inside. And the take-up reel 15 which winds up the hose 7 of the continuous vibrator 1 is provided in the position which protruded from the formwork main body 2a on the right side in the figure on this stand.
As shown in FIGS. 3 and 4, the guide means 10 and the continuous vibrator 1 are installed in four rows with a predetermined interval in the circumferential direction of the tunnel so that the top end region R <b> 1 becomes a compaction influence range by the continuous vibrator 1. It is set in advance before placing.

  Next, as shown in FIG. 4, concrete is supplied to the side wall region R3 and the shoulder region R2 from a concrete placement port 16 provided at a predetermined position of the mold body 2a, and a rod-like vibrator (not shown) or a mold frame is supplied. The concrete is compacted using a vibrator (not shown). Since the placement work in these regions R2 and R3 is the same as the conventional one, a detailed description thereof will be omitted.

Next, the placing procedure and the compacting procedure in the vicinity of the top end of the tunnel mold 2 will be specifically described with reference to FIGS.
As shown in FIGS. 3 and 5 (a), a plurality of concrete placement openings 16 are provided in the tunnel extending direction near the top end of the tunnel form 2. FIG. As a basic placing procedure, concrete is placed from the existing lining side toward the end formwork side. Further, as a basic compaction procedure, the vibrator body 4 on the existing lining side is sequentially driven from the vibrator body 4 to the wife side with the position of the continuous vibrator 1 fixed (see FIG. 3).

As shown to Fig.5 (a), concrete is discharged from the 1st placement port 16a nearest to the existing lining 11 and the 2nd placement port 16b which approached the end form side next to it. At this time, the vibrator is driven only by the vibrator main body 4 on the existing lining side close to the first placement opening 16a, and the vibrator main body 4 located near the second placement opening 16b is not driven. By doing so, the concrete is less likely to flow to the end form side, while the vibrator is driven on the existing lining side, so that the concrete flows, and as a result, the filling property is improved.
As shown in FIG. 5B, when the existing lining 11 side is sufficiently filled with concrete, the second placing port 16b continues to be discharged and the vibrator main body 4 is driven as shown in FIG. 5C. Switch to the one on the side of the Tsumazu formwork and drive it. And if this part is also fully filled with concrete, as shown in FIG.5 (d), it will switch to the discharge from the 3rd placement port 16c, and the drive of the vibrator main body 4 will also be switched to the thing on the end form frame side. At this time, the discharge from the second placement port 16b may be continued. In the same manner, concrete placement is advanced to the end formwork side.
As described above, in the concrete placing procedure, the concrete is basically discharged from the two concrete placing ports 16, but the number of the concrete placing ports 16 to be discharged is one or two depending on the progress of the concrete placing. These may be used properly, or may be switched sequentially using only one.
In any case, in the compaction by the continuous vibrator 1, even after the concrete is filled, any of a plurality of vibrator bodies 4 can be repeatedly operated and compacted according to the concrete filling condition. Will increase.
It should be noted that an air vent 17 (see FIG. 5) for connecting the mold body 2a and the gap may be provided in advance at a place where a gap between the filled concrete and the tunnel wall surface 3 is expected to be formed.

As shown in FIG. 3, at the end of the supply of concrete, when the continuous vibrators 1 arranged in four rows are pulled using a traction tool such as a lever block and the hose 7 is taken up by the take-up reel 15, Vibrator 1 is guided by guide means 10 and moves toward the wife, and is pulled out from top end region R1. And in the case of this extraction, you may move the vibrator main body 4 vibrating.
As shown in FIG. 3, an opening 9a having a size that allows the vibrator main body 4 to be pulled out is provided in the end frame 9 portion through which the connecting member 6 of the continuous vibrator 1 passes, and is connected to the opening 9a. It is preferable that the gap between the member 6 and the vibrator main body 4 can be almost liquid-tightly closed by packing or the like.

In the concrete compaction vibrator and compaction method according to the present embodiment described above, since the plurality of vibrator bodies 4 are integrated, the plurality of vibrator bodies 4 can be disposed at predetermined placement locations. For this reason, during the placement of concrete, the entire concrete can be compacted without moving the vibrator body 4 in a fixed state. And, since the concrete can be repeatedly compacted many times during the placement of the concrete, it is possible to prevent the formation of voids formed on the back surface of the lining, and to prevent the separation of the concrete material, thereby improving the quality of the concrete. .
In addition, the concrete compaction vibrator and compaction method according to the present embodiment eliminates the trouble of moving the vibrator in the tunnel traveling direction as in the prior art, thus saving labor in compaction work and improving work efficiency. Can be made.

As mentioned above, although the embodiment of the vibrator for compaction and the compaction method according to the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the present invention. .
For example, although the continuous vibrator 1 is disposed in the top end region R1 in the present embodiment, the present invention is not necessarily limited thereto, and is applied to the shoulder region R2 and the sidewall region R3 in the same manner as described above. can do.
In the present embodiment, the continuous vibrator 1 is applied to concrete placement using the tunnel mold 2, but the present invention is not limited to such a mold. The application range of the continuous vibrator 1 is not limited to tunnel lining, and can be applied to a wide range of constructions that perform compaction when placing concrete.
In the present embodiment, the vibrator main body 4 is positioned above the connecting member 6 when the continuous vibrator 1 is arranged in the top end region R1, but the connecting member 6 is guided upside down. The vibrator main body 4 may be located below the connecting member 6 by suspending it with a suspension 13 provided movably on the means 10 (see FIG. 2). In this case, there is a possibility that the tip of the vibrator body 4 may hang down, but a separate suspender is attached to the tip of the vibration part 4a to prevent the sag from falling, and this suspender is engaged with the connecting member 6 or the guide means 10. do it.

It is a figure which shows the continuous vibrator by embodiment of this invention, (a) is the sectional side view, (b) is the sectional view on the AA line shown to Fig.1 (a). It is a figure which shows the installation state of a continuous vibrator. It is a top view which shows the installation state of a continuous vibrator. It is sectional drawing which shows the installation state of a continuous vibrator. (A)-(d) is a figure which shows the placement state which uses a continuous vibrator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Continuous vibrator 2 Tunnel formwork 2a Formwork body 4 Vibrator body 4a Vibrating part 5 Electric wire 6 Connection member (connection means)
8 Protective member 10 Guide means 15 Take-up reel 16 Concrete placement port R Placement area R1 Top end area

Claims (5)

In a vibrator including a vibrator main body having a vibration part that applies vibration to concrete,
A vibrator for concrete compaction, wherein a plurality of vibrator main bodies are arranged in series at predetermined intervals, and the vibrator main bodies are connected and integrated by connecting means.   2. The concrete compacting vibrator according to claim 1, wherein the connecting means is extended so as to be substantially parallel to the vibrator body arranged in series. 3.   The vibrator for concrete compaction according to claim 1 or 2, wherein an electric wire for supplying power to each of the vibrator main bodies is wired inside the connecting means.   The vibrator for concrete compaction according to any one of claims 1 to 3, wherein the vibrator body is provided with a protective member. Before placing concrete, arrange a plurality of vibrator main bodies having a vibration part in a predetermined placement area in advance at a predetermined interval,
When placing concrete, the vibrator body is vibrated and the concrete is compacted,
A compacting method, wherein the vibrator main body is moved from the placement area after concrete placement.

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