JP2004293075A - Tunnel partition device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a partion device from moving even when strong wind blows in the tunnel, in the tunnel partition device provided with an arch-shaped balloon closely attached to the tunnel internal wall and securing the partition function. <P>SOLUTION: The partition device has an arch-shaped frame 61 having an arch-shape arranged with a gap to the tunnel internal wall 1 and having a recess 61c for housing a balloon to be opened to the external peripheral side along the arch shape and an arch-shaped balloon 62 having the interior side thereof housed in the interior of the recess 61c for housing the balloon and its outer peripheral side to be closely stuck to the tunnel internal wall 1 by expanding from the arch-shaped frame 61 to the external peripheral side with supply of a fluid. The arch-shaped frame 61 is fixed to main bodies 3a of forms 3 for tunnel lining. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tunnel partitioning device used for curing concrete after casting during tunnel lining.
[0002]
[Prior art]
An annular tube formed of a stretchable elastic member such as rubber, which is expanded by press-fitting a fluid such as air or water and closely adheres to the inner wall of the tunnel, and a sheet covering an inner peripheral space surrounded by the annular tube. There is a moving partition device in a tunnel (see Patent Document 1). According to this, it is quickly and easily assembled, isolating the concrete casting section in the tunnel from the outside air, preventing the cast concrete from being exposed to a sudden temperature change with the outside air, and curing the cast concrete. Can be performed well.
In order to prevent the annular tube or the horseshoe-shaped tube from sagging due to its own weight, there is also one in which two holding rods having a tube holding portion and a length adjusting portion are provided upright (see Patent Document 2).
[0003]
[Patent Document 1]
Japanese Utility Model Registration No. 3033931 [Patent Document 2]
Japanese Utility Model Registration No. 3075320
[Problems to be solved by the invention]
However, sufficient strength is not obtained with only two holding rods against the strong wind in the tunnel, and the annular tube or horseshoe-shaped tube that has been in close contact with the inner wall of the tunnel is moved by the wind pressure and moves as a partition. There was a problem that would not work.
[0005]
An object of the present invention is to secure a partition function in a tunnel partition device provided with an arch-shaped balloon that is brought into close contact with the inner wall of a tunnel so as not to move even when a strong wind blows in the tunnel.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 forms an arch shape which is arranged at a distance from the tunnel inner wall 1 as shown in FIGS. Frame 61 having a balloon storage recess 61c that is opened to the outer circumference side, and the inner circumference side is housed in the balloon storage recess 61c, and expands from the arch-shaped frame 61 to the outer circumference side by the supply of fluid to form a tunnel. It is characterized by a tunnel partitioning device 6 including an arch-shaped balloon 62 whose outer peripheral side can be in close contact with the inner wall 1.
[0007]
According to the first aspect of the present invention, the inner peripheral side of the arch-shaped balloon, whose outer peripheral side is in close contact with the inner wall of the tunnel, is housed in the arch-shaped frame. The balloon does not move.
[0008]
The invention according to claim 2 is the tunnel partitioning device 6 according to claim 1, wherein, as shown in FIGS. 1 and 4, for example, the arch-shaped frame 61 is provided with a slide center 3 for tunnel lining. Is fixed to the main body 3a.
[0009]
According to the second aspect of the present invention, since the arched frame is fixed to the slide center body, the partition device moves together with the slide center.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4, reference numeral 1 denotes an inner wall of a tunnel, 2 denotes cast concrete (secondary lining), 3 denotes a slide center, 4 denotes a rail, 5 denotes an air duct, 6 denotes a tunnel partitioning device, 61 denotes an arch-shaped frame, 62 is an arched balloon, 63 is a blower, and 64 is a sheet.
[0011]
In the tunnel, as shown in the figure, a rail 4 is laid, and an air duct 5 extending to the face is installed.
The slide center 3 has 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.
A tunnel partitioning device 6 is provided on the wife side of the main body 3a of the slide center 3, respectively.
[0012]
The tunnel partitioning device 6 includes an arch-shaped frame 61 fixed to the wife side of the main body 3a of the slide center 3, an arch-shaped balloon 62 housed in a balloon housing recess 61c of the arch-shaped frame 61, a blower 63, It is composed of a sheet 64. The blower 63 is for supplying air into the arched balloon 62. As shown in FIG. 3, the sheet 64 is for covering the inside surrounded by the arched frame 61, and is specifically formed by joining a large number of sheets.
[0013]
As shown in FIG. 1, the arch-shaped frame 61 has an arch shape that is arranged at a predetermined distance (for example, about 300 to 500 mm) away from the inner wall 1 of the tunnel, and has an outer periphery along the arch shape. It has a balloon storage recess 61c that opens to the side. That is, as shown in an enlarged manner in FIG. 2, the arched frame 61 is formed of a steel material in which an arched web 61b is continuous on the inner peripheral side of two parallel arched flanges 61a. A balloon accommodating recess 61c is formed so as to be surrounded by the arch-shaped flange 61a and the arch-shaped web 61b.
[0014]
The inner peripheral side of the arched balloon 62 is appropriately fixed and accommodated over the entire length of the balloon accommodating recess 61c of the arched frame 61 described above. This arch-shaped balloon is formed of an elastic tube such as a rubber tube and a waterproof cloth tube which can be expanded and contracted. The arched balloon 62 is supplied with air from a blower 63.
[0015]
Next, the operation of the tunnel partitioning device 6 having the above configuration will be described.
Prior to the secondary lining, a predetermined concrete casting space is formed between the inside of the tunnel and the tunnel inner wall 1 by the slide form 3c of the slide center 3, as shown in FIG.
[0016]
Further, in the tunnel partition device 6 provided on the wife side of the main body 3a of the slide center 3, air is blown into the arched balloon 62 by driving the blower 63. Thereby, the arch balloon 62 in the arch frame 61 starts to expand, and as shown in FIG. 2, the arch balloon 62 expands from the arch frame 61 to the outer peripheral side.
As shown in FIGS. 3 and 4, on the cutting face side, the outer peripheral side of the arch-shaped balloon 62 is in direct contact with the tunnel inner wall 1, and on the opposite wellhead side, the arched balloon is cast on the concrete 2. 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 inside 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 of the wife of the main body 3 a of the slide center 3. Specifically, a sheet 64 is provided except for the dump truck passage space S.
Thereafter, secondary lining is performed by placing concrete 2 in the space between tunnel inner wall 1 and slide form 3c.
[0018]
As described above, by storing the inner peripheral side of the arch-shaped balloon 62 whose outer peripheral side is in close contact with the tunnel inner wall 1 in the arch-shaped frame 61, the arch-shaped frame 61 is retained by the arched frame 61 even when a strong wind blows in the tunnel. The movement of the balloon 62 can be reliably prevented. Therefore, the partition function at the time of the secondary lining can be sufficiently ensured.
In other words, on both sides of the slide center 3 on the wife side, the arch-shaped balloon 62 can be quickly inflated, and the secondary lining section can be isolated from the outside air. As a result, especially in the cold season, the cast concrete 2 can be prevented from being exposed to a sudden temperature change with the outside air. Therefore, curing of the cast concrete 2 can be performed reliably.
[0019]
After a predetermined curing time has elapsed, the operation of the blower 63 is stopped, whereby the arch balloon 62 is contracted into the arch frame 61, and the seat 64 is removed to complete the partition.
Thereafter, the slide center 3 is moved, and the secondary lining of the next section is similarly performed.
[0020]
Although air is supplied to the balloon by a blower, a fluid such as gas or water may be supplied to or discharged from the balloon.
[0021]
【The invention's effect】
According to the first aspect of the present invention, the arched balloon does not move due to the holding of the arched frame against the strong wind in the tunnel, so that the partitioning function can be secured.
[0022]
According to the second aspect of the present invention, in addition to the effect obtained by the first aspect of the present invention, there is obtained an advantage that the partitioning device can be moved together with the slide center.
[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 sentence and an arched frame viewed from a wife side.
FIG. 2 is an enlarged perspective view showing a part of the arched frame and the arched balloon cut away.
FIG. 3 is a schematic front view showing a partition state from the state of FIG. 1;
FIG. 4 is a schematic side view showing the state of the arch-shaped frame and the arch-shaped balloon before and after the center broken at the center of the tunnel.
[Explanation of symbols]
1 Tunnel inner wall 2 Casting concrete (secondary lining)
Reference Signs List 3 slide centure 3a main body 3c slide form 4 rail 5 blower tube 6 tunnel partitioning device 61 arched frame 61a flange 61b web 61c balloon storage recess 62 arched balloon 63 blower 64 seat

Claims (2)

An arch-shaped frame that has an arch shape that is spaced apart from the inner wall of the tunnel and has a concave portion for balloon storage that is opened to the outer peripheral side along the arch shape,
An arch-shaped balloon whose inner peripheral side is accommodated in the balloon accommodating concave portion of the arch-shaped frame, and which is inflated to the outer peripheral side from the arch-shaped frame by the supply of fluid and is capable of closely adhering to the inner wall of the tunnel. Tunnel partition device. The tunnel partitioning device according to claim 1, wherein the arch-shaped frame is fixed to a main body of a slide centric for tunnel lining.

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