JPH0559893A - Construction joint face closing device for tunnel - Google Patents

Abstract

PURPOSE:To quickly expand or shrink an air bulkhead for closing the construction joint face of a tunnel and stemming concrete with a simple action. CONSTITUTION:Multiple flexible tubes 7 are connected in series to constitute a circular arc-shaped air bulkhead 1. The air bulkhead 1 is inserted between a concrete wall molding form and a waterproof thick winding sheet. An air pump 12 capable of feeding or discharging air is installed on a moving frame 11. Terminals 15 of the air pump 12 are connected to air valves 9 of the tubes 7 via air pipes 16. A transfer switch 31 switching the air pump 12 to the air feed side or the air discharge side and multiple selector switches 32 selecting the tubes 7 are arranged on an operation panel 14. The air pump 12 is controlled by the switch action of the operation panel 14, and the air bulkhead 1 is expanded or shrunk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pour joint closing device used for preventing concrete from flowing out from a pour joint surface during a concrete wall construction work of a tunnel.

[0002]

2. Description of the Related Art Conventionally, as this type of device, there is known a technique using an air bulkhead in which a plurality of flexible tubes are connected in series and in an arc shape as a whole (for example, Japanese Patent Application Laid-Open No. 2000-242242). 61-274099). In the conventional device, as shown in FIG. 5, two air bulkheads 1 are interposed between a concrete wall molding form 2 and a waterproof rolled thick sheet 3, and a holding frame 4 and a support material are provided. 5 is assembled and held. When placing concrete,
The air bulkhead 1 is expanded by a compressor (not shown) to close the splicing surface to block the concrete C and prevent the rolled thick sheet 3 from being damaged. At the time of demolding, the air bulkhead 1 is contracted by natural exhaust and separated from the construction surface.

[0003]

However, according to the conventional device, when the air bulkhead 1 is expanded, it is necessary to sequentially carry the compressor to a plurality of tubes to fill the air, which is troublesome and time consuming. When demolding,
Air in each tube is released by natural exhaust by opening the check valve in the thin air supply nozzle.
Had to wait a long time for the whole to shrink.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device for closing a tap joint surface of a tunnel which can quickly expand or contract the air bulkhead by a simple operation.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, a striking surface closing device of the present invention comprises a plurality of flexible tubes connected in series to form a concrete wall and a waterproof mold. Air bulkhead that is interposed between the air bulkhead and a plurality of sheets of air, a plurality of air pipes that are connected to each tube of this air bulkhead, and a supply pipe that is connected to the air bulkhead through these air pipes. It is composed of an air pump capable of exhausting, a changeover switch for switching the air pump to the air supply side or the exhaust side, and an operation panel equipped with a selection switch for selecting a tube.

[0006]

[Operation] At the time of setting, the air pump is switched to the air supply side by the changeover switch on the operation panel, the tubes are sequentially selected by the selection switch, and the compressed air from the air pump is filled into each tube through the air pipes, and the air bulk The head is inflated.

At the time of demolding, the air pump is switched to the exhaust side by the changeover switch, the tubes are sequentially selected by the selection switch, and the air in each tube is forcibly discharged through the air piping by the air pump, and the air bulkhead is removed. Be contracted. Therefore, air supply or exhaust of each tube can be collectively controlled by the operation panel with the air pump installed at a fixed position, and the air bulkhead can be quickly expanded or contracted by a simple operation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, one large diameter air bulkhead 1 is used in the striking face closing device of this embodiment. The air bulkhead 1 is configured by connecting a plurality of tubes 7 in series and in an arc shape as a whole, and joint ends of the tubes 7 are wrapped with each other. The tube 7 is made of a flexible sheet of vinyl chloride or the like so as to have an inner and outer double layers, and an air valve 9 is provided in a part thereof. Then, the air bulkhead 1 is interposed between the form wall 2 for concrete wall molding and the rolled thick sheet 3 for waterproofing as in the conventional case (see FIG. 5), and is assembled by the holding frame 4 and the support material 5. Attached. However, unlike the prior art, the air bulkhead 1 of this embodiment is attached to the formwork 2 side so that it can move in the tunnel together with the formwork 2 as the construction progresses.

An air pump 12 capable of supplying and exhausting air for expanding or contracting the air bulkhead 1 is installed on a movable base 11 to which the frame 2 is assembled.
A portable operation panel 14 is connected to 2 via a cable 13. The air pump 12 has the same number of terminals 15 as the tubes 7, and each terminal 15 is connected to an air valve 9 of the tube 7 via an air pipe 16.

As shown in FIGS. 2 and 3, the air pump 1
A motor 19 and a pump cylinder 20 are mounted on the base 18 of the second embodiment.
Are installed, and the motor 19 is coupled to a rotor (not shown) in the pump cylinder 20 via a coupling 21. An air supply mechanism section 22 and an exhaust mechanism section 23 are installed above the pump cylinder 20, and a controller 24, a gauge 25, a filter (not shown) and the like are provided in these. An air supply side electromagnetic valve 26 and an exhaust side electromagnetic valve 27 are disposed above the motor 19, and the air supply mechanism section 22 and the exhaust mechanism section 23 are connected to a terminal unit 28 via the respective electromagnetic valves 26, 27. Has been done. The terminal unit 28 is provided with each of the terminals 15 and a solenoid valve 30 for opening and closing them. Reference numeral 29 is a control panel attached to the air pump 12, to which the operation panel 14 is connected via the cable 13.

As shown in FIG. 4, the operation panel 14 is provided with one changeover switch 31 and the same number of selection switches 32 as the tubes 7 arranged in an annular shape. The changeover switch 31 is
Stop position for stopping the air pump 12, the air supply side solenoid valve 26
3 of the air supply position that opens the
It can be switched to the position. Each selection switch 32
Is an open position for opening each solenoid valve 30 of the terminal unit 28,
It can be switched to two positions of a closed position to close it. Reference numeral 33 is a handle for carrying the operation panel 14.

Next, a method of using the striking face closing device of this embodiment constructed as described above will be explained. At the time of placing concrete, the changeover switch 31 of the operation panel 14
To the air supply position. Then, the air supply side solenoid valve 26 of the air pump 12 is opened and the motor 19 is activated. In this state, when the selection switch 32 of the tube 7 to be filled is switched to the open position, the corresponding terminal unit 28
The electromagnetic valve 30 is opened, and the compressed air from the air pump 12 is filled in the tube 7 through the air pipe 16. If the tubes 7 are sequentially selected and filled by the selection switch 32, the entire air bulkhead 1 expands. It is possible to operate a plurality of selection switches 32 at the same time, but in this case, the filling speed of each tube 7 becomes slow.

At the time of demolding, the changeover switch 31 is changed over to the exhaust position. Then, the exhaust side solenoid valve 2 of the air pump 12
7 is opened and the motor 19 is started. When the selection switch 32 of the tube 7 to be exhausted is switched to the open position,
The solenoid valve 30 of the terminal unit 28 corresponding to this opens,
The air filled in the tube 7 passes through the air pipe 16 and is forcibly discharged by the air pump 12. When the tubes 7 are sequentially selected by the selection switch 32 and exhausted, the entire air bulkhead 1 contracts.

Therefore, according to the striking surface closing device of this embodiment, air supply or exhaust of each tube 7 is performed by hand operation on the operation panel 14 with the air pump 12 installed at a fixed position on the movable base 11. It is possible to collectively control, and the air bulkhead 1 can be rapidly expanded or contracted by a very simple operation. Further, in this embodiment, since one large-diameter air bulkhead 1 is used, the setting work is simpler and the concrete leakage due to twisting and rolling occurs as compared with the conventional case using a plurality of air bulkheads. Hard to do.
Moreover, since the air bulkhead 1 is attached to the mold 2 side, it can be moved integrally with the mold 2 by contracting the air bulkhead 1 and separating it from the construction surface at the time of demolding. Unlike this, you can save the trouble of folding and removing.

The present invention is not limited to the above-mentioned embodiment, and for example, the air pump 1 is operated by the operation panel 14.
2 is configured to be controlled wirelessly, the selection switch 32 of the operation panel 14 is configured to be a single dial switch, and the shape and configuration of each part are appropriately changed without departing from the gist of the present invention. It is also possible to embody.

[0016]

As described in detail above, according to the present invention, a plurality of tubes of an air bulkhead are connected to an air pump capable of supplying and exhausting air through an air pipe, and the air pump is controlled by a switch operation of an operation panel. The air bulkhead can be quickly expanded or contracted by a simple operation.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a striking face closing device showing an embodiment of the present invention.

FIG. 2 is a front view showing the air pump of FIG. 1 in detail.

FIG. 3 is a plan view of FIG.

FIG. 4 is a front view showing the operation panel of FIG. 1 in detail.

FIG. 5 is a sectional view showing a construction state of a conventional air bulkhead.

[Explanation of symbols]

1 air bulkhead, 2 formwork, 3 roll thick sheet, 7
Tube, 12 air pump, 14 operation panel, 16
Air piping, 31 changeover switch, 32 selection switch.

Claims (1)

[Claims] 1. An air bulkhead which is formed by connecting a plurality of flexible tubes in series and is interposed between a formwork for concrete wall molding and a rolled thick sheet for waterproofing, and each of the air bulkheads. A plurality of air pipes connected to the tube, an air pump connected to the air bulkhead via the air pipe, capable of supplying and exhausting air, a changeover switch for switching the air pump to the air supply side or the exhaust side, and the tube selected A device for closing a joint surface of a tunnel, which comprises a control panel equipped with a selection switch.