JP4037301B2 - Tunnel partition device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tunnel partition device used for curing concrete after placing during tunnel lining.
[0002]
[Prior art]
An annular tube formed of a stretchable elastic member such as rubber, which is inflated by press-fitting a fluid such as air or water and is in close contact with the inner wall of the tunnel, and a sheet covering an inner circumferential space surrounded by the annular tube There is a moving partition device in a tunnel (see Patent Document 1). According to this, it is assembled quickly and easily, isolating the concrete placement section in the tunnel from the outside air, preventing the placement concrete from being exposed to a sudden temperature change with the outside air, and curing the placement concrete. Can be performed well.
And in order to prevent drooping by the dead weight of an annular tube or a horseshoe-shaped tube, there exist some which installed two holding rods which have a tube holding part and a length adjustment part (refer patent document 2).
[0003]
[Patent Document 1]
Utility Model Registration No. 3033931 [Patent Document 2]
Utility Model Registration No. 3075320 Publication [0004]
[Problems to be solved by the invention]
However, with the strong wind in the tunnel, sufficient strength cannot be obtained with only two holding rods, and the annular tube or horseshoe-shaped tube that is in close contact with the inner wall of the tunnel moves under the wind pressure and acts as a partition. There was a problem that would stop functioning.
[0005]
An object of the present invention is to secure a partition function in a tunnel partition device including an arched balloon that is in close contact with an inner wall of a tunnel so as not to move even if a strong wind blows into the tunnel.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is, for example, as shown in FIGS. 1 to 4, two parallel flanges having an arch shape that are spaced apart from the inner wall of the tunnel. And an arcuate frame having a balloon storage recess that is continuously formed by a web connecting the flanges and that is open to the outer peripheral side along the arcuate shape;
An inner circumferential side is accommodated in a balloon accommodating recess of the arch-shaped frame, and an arch-shaped balloon that expands from the arch-shaped frame to the outer circumferential side by supply of fluid and can be closely adhered to the inner wall of the tunnel is provided. .
[0007]
According to the first aspect of the present invention, since the inner peripheral side of the arched balloon whose outer peripheral side is in close contact with the inner wall of the tunnel is housed in the arched frame, the arched frame is held by holding the arched frame even if strong wind blows in the tunnel. The balloon does not move.
[0008]
The invention according to claim 2 is the tunnel partition device 6 according to claim 1, wherein, for example, as shown in FIGS. 1 and 4, the arch-shaped frame 61 is a slide center 3 for tunnel lining. It is characterized by being fixed to the main body 3a.
[0009]
According to the invention described in claim 2, since the arch-shaped frame is fixed to the slide centle main body, the partition device moves together with the slide centle.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4, 1 is a tunnel inner wall, 2 is cast concrete (secondary lining), 3 is a slide center, 4 is a rail, 5 is a blow pipe, 6 is a tunnel partition device, 61 is an arched frame, 62 is an arched balloon, 63 is a blower, and 64 is a sheet.
[0011]
As shown in the figure, a rail 4 is laid in the tunnel, and a blower pipe 5 extending to the face is installed.
The slide center 3 is provided with a slide form 3c corresponding to the secondary lining of the tunnel inner wall 1 in the main body 3a, and the main body 3a moves on the rail 4 by the wheels 3b. 3d is a staircase.
Tunnel partition devices 6 are respectively provided on the side of the body 3a of the slide center 3 described above.
[0012]
The tunnel partition device 6 includes an arch-shaped frame 61 fixed to the side of the main body 3a of the slide centle 3, an arch-shaped balloon 62 housed in a balloon housing recess 61c of the arch-shaped frame 61, a blower 63, and The sheet 64 is configured. The blower 63 is for supplying air into the arched balloon 62. As shown in FIG. 3, the sheet 64 is for covering the inner side surrounded by the arch-shaped frame 61. Specifically, the sheet 64 is formed by connecting a large number of sheets.
[0013]
As shown in FIG. 1, the arch-shaped frame 61 has an arch shape that is spaced apart from the tunnel inner wall 1 by a predetermined dimension (for example, about 300 to 500 mm), and an outer periphery along the arch shape. It has a balloon housing recess 61c that is open to the side. That is, as shown in an enlarged view in FIG. 2, the arch-shaped frame 61 is formed of a steel material in which an arch-shaped web 61b is continuous on the inner peripheral side of two parallel arch-shaped flanges 61a. A balloon housing recess 61c is formed surrounded by the arched flange 61a and the arched web 61b.
[0014]
The inner peripheral side of the arched balloon 62 is appropriately fixed and stored over the entire length of the balloon storing recess 61c of the arched frame 61 described above. The arched balloon is formed of an elastic tube such as an inflatable / shrinkable rubber tube or a waterproof cloth tube. Note that air is sent from the blower 63 to the arched balloon 62.
[0015]
Next, the operation of the tunnel partition device 6 configured as described above will be described.
Prior to the secondary lining in the tunnel, as shown in FIG. 4, a predetermined concrete placement space is formed between the tunnel inner wall 1 and the slide foam 3 c of the slide center 3.
[0016]
Further, in the tunnel partition device 6 provided on the side of the body 3 a of the slide center 3, air is sent into the arched balloon 62 by driving the blower 63. Thereby, the arch-shaped balloon 62 in the arch-shaped frame 61 starts to expand, and the arch-shaped balloon 62 expands from the arch-shaped frame 61 to the outer peripheral side as shown in FIG.
As shown in FIGS. 3 and 4, the outer peripheral side of the arched balloon 62 is in direct contact with the inner wall 1 of the tunnel on the face side, and the arched shape is placed on the cast concrete 2 on the opposite wellhead side. The outer peripheral side of the balloon 62 is in close contact. This state is maintained by continuing the operation of the blower 63.
[0017]
Further, the inner side surrounded by the arched frame 61 is covered with a sheet 64 as shown in FIG. That is, as shown in FIG. 3, the worker stretches the seat 64 along the side surface of the main body 3 a of the slide center 3. Specifically, the seat 64 is stretched except for the dump truck passage space S.
Then, the secondary lining is performed by placing concrete 2 in the space between the tunnel inner wall 1 and the slide foam 3c.
[0018]
As described above, since the inner peripheral side of the arched balloon 62 whose outer peripheral side is in close contact with the inner wall 1 of the tunnel is housed in the arched frame 61, the arched frame 61 can be held even when strong wind blows in the tunnel. It is possible to reliably prevent the balloon 62 from moving. Therefore, the partition function at the time of secondary lining can be sufficiently secured.
In other words, the arched balloon 62 can be quickly inflated on both sides of the slide center 3 on the wife side to isolate the secondary lining section from the outside air. As a result, it is possible to prevent the cast concrete 2 from being exposed to a rapid temperature change with the outside air, particularly in the cold season. Therefore, curing of the cast concrete 2 can be performed reliably.
[0019]
After the predetermined curing time has elapsed, the operation of the blower 63 is stopped, whereby the arched balloon 62 is contracted into the arched frame 61, and the seat 64 is removed to complete the partitioning.
Thereafter, the slide centle 3 is moved, and the secondary lining of the next section is performed in the same manner.
[0020]
Note that air is supplied to the balloon by the blower, but other fluids such as gas and water may be supplied to and discharged from the balloon.
[0021]
【The invention's effect】
According to the first aspect of the present invention, since the arched balloon does not move by holding the arched frame against the strong wind in the tunnel, the partition function can be secured.
[0022]
According to the invention described in claim 2, in addition to the effect obtained by the invention described in claim 1, there is obtained an advantage that the partition device can be moved together with the slide centle.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing a configuration of an embodiment to which the present invention is applied, showing a centle and an arched frame as viewed from a wife side.
FIG. 2 is an enlarged perspective view in which a part of an arched frame and an arched balloon is cut away.
FIG. 3 is a schematic front view showing a partitioning state from the state of FIG. 1;
FIG. 4 is a schematic side view showing the state of the arch-shaped frame and arch-shaped balloon before and after the centle, broken at the tunnel center.
[Explanation of symbols]
1 Tunnel inner wall 2 Cast concrete (secondary lining)
3 Slide Centle 3a Main Body 3c Slide Foam 4 Rail 5 Blower Pipe 6 Tunnel Partition Device 61 Arched Frame 61a Flange 61b Web 61c Balloon Storage Recess 62 Arched Balloon 63 Blower 64 Sheet

Claims (2)

For storing balloons that are continuously formed by two parallel flanges in the shape of an arch that are spaced apart from the inner wall of the tunnel and a web that connects the flanges and that are opened to the outer periphery along the arch shape. An arched frame having a recess;
An inner circumferential side is accommodated in a balloon accommodating recess of the arch-shaped frame, and an arch-shaped balloon that expands from the arch-shaped frame to the outer circumferential side by supply of fluid and can be closely adhered to the inner wall of the tunnel is provided. Tunnel partition device. The tunnel partition device according to claim 1, wherein the arch-shaped frame is fixed to a main body of a slide centle for tunnel lining.

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