JP2000356099A - Method for compacting concrete of tunnel lining - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for compacting the concrete of tunnel lining that can easily compact concrete supplied near existing tunnel lining, particularly near its top end, thus enhancing operational efficiency, and preventing formation of defective parts. SOLUTION: A guide means 13 for guiding the power supply cable 15 of a vibrator 14 is provided on the end face 12 of existing tunnel lining 10, and prior to the supply of concrete 20 between a form 17 and the excavated face of the tunnel the power supply cable 15 is freely movably hung on the guide means 13 with the vibrator 14 positioned between the form 17 and the excavated face of the tunnel. The concrete 20 supplied near a top end in the vicinity of the existing tunnel lining 10 is compacted by the vibrator 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for compacting concrete for tunnel lining suitable for application to construction such as tunnel lining.

[0002]

2. Description of the Related Art Conventionally, when constructing a tunnel lining,
A concrete formwork is installed inside the tunnel excavation surface that excavated the ground, concrete is supplied between this concrete formwork and the tunnel excavation surface, and the vibrator is vibrated in this concrete to compact the concrete Was common.

[0003]

However, according to the conventional method of compacting concrete for tunnel lining, when the concrete supplied near the existing concrete lining is compacted with a vibrator, the existing concrete lining becomes an obstacle. And it is difficult to operate the vibrator,
There was a problem that work efficiency was reduced. In particular, there is a problem that the work is troublesome and the defect is apt to occur because the work is upward at the top end of the concrete lining.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can easily compact concrete supplied in the vicinity of an existing tunnel lining, particularly in the vicinity of a top end, thereby improving work efficiency. Can be raised,
An object of the present invention is to provide a method for compacting concrete for tunnel lining, which can prevent the occurrence of defects.

[0005]

The present invention has the following features to attain the object mentioned above. That is, the present invention provides a formwork installed inside a digging surface of a tunnel, disposing an automatic winding reel for a power supply cable at a predetermined position of the formwork, and pulling out the automatic winding reel. A vibrator is connected to the tip of the power supply cable, and the vibrator is inserted between the formwork and the tunnel excavation surface through a window provided in the formwork, and the vibrator is connected to the excavation surface of the tunnel. In a concrete compaction method of a tunnel lining for compacting the concrete by vibrating the vibrator in concrete supplied between the guides, a guide for guiding a power supply cable of the vibrator to an end face of an existing tunnel lining. Providing means,
Before supplying concrete between the formwork and the excavation surface of the tunnel, the vibrator is disposed between the formwork and the excavation surface of the tunnel by movably moving the power supply cable to the guide means. The concrete supplied near the top end near the existing tunnel lining is compacted by the vibrator.

(Function) In the method for compacting concrete for tunnel lining according to the present invention, when concrete is poured continuously into the existing tunnel lining, guide means attached in advance to the end face of the existing tunnel lining. By virtue of the movable power supply cable, the vibrator can be arranged near the existing tunnel lining.
Then, by pulling the power cable of this vibrator when concrete is supplied and moving the vibrator, concrete supplied near the existing tunnel lining, especially near the top end, can be compacted in a wide range. It will be easier.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a concrete compaction method for a tunnel lining according to the present invention will be described below in detail with reference to the drawings.

Here, for convenience of explanation, first, a construction method of a tunnel lining to which the present invention is applied will be described with reference to FIG. 2, and thereafter, a tunnel lining according to the present invention will be described with reference to FIG. The concrete compaction method will be described.

FIG. 2 is a view for explaining a method of applying a lining to obtain a ton obtained by applying the method of compacting concrete for tunnel lining according to the present invention. The figure shows a case where there is a concrete lining 10 which has already been completed, and the next concrete lining 11 is to be constructed following the concrete lining 10. In this case, first, a rod-shaped receiving guide 1 is provided as a guide means on the end face 12 of the existing concrete lining 10.
3 is attached.

The receiving guide 13 is for hooking the power supply cable 15 of the top-end bar-shaped vibrator 14, and has a hook 13a at the tip. The receiving guide 13 is attached at a suitable distance, for example, about 1.5 m away from the top of the concrete lining 10 along the concrete and below.

Next, a formwork 17 for the next concrete lining 11 is installed over a predetermined length continuously from the existing concrete lining 10 inside the excavated surface 16 of the excavated tunnel. Concrete supply,
A plurality of windows 18 are provided for inserting a vibrator, monitoring between the formwork 17 and the excavation surface 16, and the like.

Next, an automatic take-up reel 19 (only one is shown) for the power supply cable 15 is attached to a predetermined position on the passage side of the mold 17. The automatic winding reel 19 winds the power supply cable 15 using, for example, the tension of a spring. As this automatic take-up reel 19, a commercially available one can be used.

Various vibrators are attached to the end of the power supply cable 15 wound on the automatic take-up reel 19. In the present embodiment, a rod-shaped vibrator 14 for compacting the concrete 20 near the top end near the existing concrete lining 10 and a floating vibrator 21 for compacting most of the other concrete are attached. Keep it.

Then, the rod-shaped vibrator 14 and the floating vibrator 21 are inserted through the window 18 near the place where the compaction is to be performed, and are arranged at predetermined positions. In the present embodiment, as shown in FIG. 1, the rod-shaped vibrator 14 is inserted from a window 18 closest to the existing concrete lining 10 and near the top end. At this time, the power supply cable 15 of the rod-shaped vibrator 14 is connected to the receiving guide 13.
To the hook 13a.

Further, as shown in FIG. 2, a floating vibrator 21 is inserted through a window 18 slightly below the top end of the mold 17. In the present embodiment, a relatively large number of floating vibrators 21 are arranged near the existing concrete lining 10, and fewer are arranged far away. This is because more concrete 20 is supplied from the existing concrete lining 10 side.

After the bar-shaped vibrator 14 and the floating vibrator 21 are arranged at predetermined positions, the mold 17 is first opened using the lower window 18 as shown in FIG.
A concrete supply pipe 30 and an auxiliary hose 31 attached to the tip thereof are inserted between the concrete supply pipe 30 and the excavation surface 16 of the tunnel to supply the concrete 20. Auxiliary hose 3
1 is formed of, for example, a thin sheet, and is flexible and freely deformable.

In this way, after the concrete 20 is supplied to a certain height, in the present embodiment, to the vicinity of the horizontal center of the form 11, this time, the concrete supply chute 35 is used from the window 18 above the horizontal center. To supply concrete 20. This concrete supply chute 35
Is a pipe made of, for example, vinyl chloride and having an inner diameter slightly larger than the concrete supply pipe 30 divided into two parts from the center, and the upper side is open.

In this way, when the concrete 20 is deposited near the top end of the formwork 11, the concrete 20 near the existing concrete lining 10, particularly near the top end, is hung by the receiving guide 13. The compacting work is performed by operating the power supply cable 15 of the rod-shaped vibrator 14.

This is because the concrete 20 near the existing concrete lining 10, particularly near the top end, is apt to be defective and requires a fine compacting work. However, the floating vibrator 21 is simply a concrete 20 The operator only operates the rod-shaped vibrator 14 to perform compaction because it is merely floating inside and cannot perform detailed operations.

Further, since the power supply cable 15 of the rod-shaped vibrator 14 is previously hung on a receiving guide 13 provided at a position where compaction is to be performed, concrete 20 is deposited, and a form 17 and a tunnel excavation surface 16 are formed. Even when the space between the two becomes almost invisible, the bar-shaped vibrator 14 can pass through a necessary place only by pulling the power supply cable 15 and the concrete 20 in that part can be easily compacted.

Further, concrete lining 1 to be newly constructed
As shown in FIG. 2, the concrete 20 near the end portion 1, that is, near the so-called end plate, particularly near the top end portion, is compacted by the long vibrator 37. The long vibrator 37 is provided with a pipe 38 of an appropriate length on the rod-shaped vibrator 14 described above.
The vibration of the rod-shaped vibrator 14 is not transmitted to the pipe 38. The long vibrator 37 is provided with a hole (not shown) in the end plate and inserted into the concrete 20 through the hole.

As described above, in the concrete compaction method for tunnel lining according to the present invention, the concrete 20 near the existing concrete lining 10, particularly near the top end where the failure is likely to occur, is prepared in advance. Since the compaction is performed using the rod-shaped vibrator 14 arranged at a predetermined position by the receiving guide 13 provided on the end face of the concrete lining 10, the operation of the rod-shaped vibrator 14 can be performed finely. The compaction can be reliably performed to prevent the occurrence of a defect, and the work efficiency can be improved.

Further, concrete lining 1 to be newly constructed
1 concrete near the end plate, especially near the top end
Is compacted by the long vibrator 37, so that operability is improved as compared with the case where compaction is performed by the ordinary rod-shaped vibrator 14, and compaction at a relatively distant position can be performed, thereby increasing work efficiency. In addition to this, the concrete 20 near the top end where the failure is likely to occur can be securely compacted to prevent the failure from occurring.

[0024]

As described above, according to the method for compacting concrete of a tunnel lining according to the present invention, when concrete is poured continuously into the existing tunnel lining, the end face of the existing tunnel lining is previously determined. By arranging the power supply cable of the vibrator movably on the guide means attached to the vibrator, the vibrator can be arranged in the vicinity of the existing tunnel lining and the vibrator can be finely operated. It is easy to compact the concrete supplied near the top end, and it is possible to prevent defects near the top end, and to further increase work efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a method for compacting concrete for tunnel lining according to the present invention.

FIG. 2 is a perspective view illustrating a construction method of the tunnel lining to which the method of compacting concrete for the tunnel lining according to the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Existing tunnel lining 11 Tunnel lining 12 End face of tunnel lining 13 Receiving guide (guide means) 14 Rod vibrator 15 Power supply cable 16 Tunnel digging surface 17 Formwork 18 Window 19 Automatic take-up reel 20 Concrete

Continuing on the front page (72) Inventor Tsutomu Kitagawa Gifu Industrial Co., Ltd. F term in the company (reference) 2D055 DA01 LA14 2E172 DB13 FA13

Claims (1)

[Claims] 1. A formwork is installed inside an excavation surface of a tunnel, an automatic take-up reel for a power supply cable is arranged at a predetermined position of the formwork, and the electric power drawn from the automatic take-up reel is provided. A vibrator is connected to the end of the supply cable, and the vibrator is inserted between the formwork and the tunnel excavation surface through a window provided in the formwork, and the vibrator is inserted between the formwork and the tunnel excavation surface. A concrete compaction method of a tunnel lining for compacting the concrete by vibrating the vibrator in the concrete supplied to the concrete, wherein guide means for guiding a power supply cable of the vibrator to an end face of an existing tunnel lining. And transferring the power supply cable to the guide means before supplying concrete between the formwork and the excavation surface of the tunnel. Arranging the vibrator freely between the formwork and the excavation surface of the tunnel, freely compacting the concrete supplied near the top end near the existing tunnel lining with the vibrator. Compacting method for tunnel lining.