JPH0791050A - Movable form device for tunnel and form positioning method - Google Patents

Abstract

PURPOSE:To perform form positioning work easily in a short time and position a form correctly into a specified position. CONSTITUTION:In a movable form device, a frame 16 is disposed in the travelable state in a tunnel 1, and a form 29 is supported on the frame 16. At the time of positioning the form 29 in the concrete lining position of the tunnel 1, the form 29 is moved into the concrete lining position by the traveling movement of the frame 16. The position of the form 29 is then detected by a detecting device 64. According to the detection result of the detecting device 64, motor-driven jacks 28 or the like are operated to position the form 29 into the specified position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable formwork apparatus for a tunnel used for concrete lining of a tunnel and a method for positioning the formwork.

[0002]

2. Description of the Related Art In a movable formwork apparatus for a tunnel of this type, a frame is provided in the tunnel so that the frame can be moved, and the formwork is supported on the frame. When lining concrete in a tunnel, the formwork is moved to a predetermined position in the tunnel by running the frame in the lengthwise direction of the tunnel, and then the formwork is manually operated while visually observing the position and posture of the formwork. Was positioned.

[0003]

Therefore, in this conventional movable formwork apparatus, the work of positioning the formwork is extremely troublesome and time-consuming, and it is necessary to accurately position the formwork at a predetermined position. There was a problem that I could not do it.

The present invention has been made by paying attention to the problems existing in such conventional techniques. It is an object of the invention to provide a movable mold frame apparatus and a mold frame positioning method capable of easily and accurately performing a mold frame positioning operation in a short time.

[0005]

In order to achieve the above-mentioned object, in the invention of claim 1, a frame disposed inside a tunnel so as to be movable in the longitudinal direction of the tunnel, and supported on the frame. And a mold that is movable between the molding position and the mold release position, and is interposed between the mold and the frame,
An actuation mechanism that is actuated to change the molding position of the mold, and detection means that detects the position or orientation of the mold,
And a control means for operating the operating mechanism according to the detection result of the detection means.

According to a second aspect of the present invention, the actuating mechanism comprises a first actuator for moving the mold in the horizontal direction and a second actuator for moving the mold in the vertical direction.

According to the third aspect of the invention, the second actuator is a left and right pair and is independently operated.
In the invention of claim 4, the first and second actuators are provided in front of and behind the mold, respectively, and are independently operated.

According to the invention of claim 5, the detecting means comprises a plurality of reflecting plates arranged on the end face of the mold and a laser measuring instrument for irradiating the reflecting plates with laser light for position measurement. .

According to another aspect of the invention, the detecting means further includes a pointer that is movably supported in the vertical and horizontal directions to direct a point on the tunnel wall surface, and a detector for detecting the moving amount of the pointer. Become.

According to the invention of claim 7, the frame is movably supported between the molding position and the mold releasing position on the frame disposed so as to be movable in the tunnel length direction. In such a movable formwork apparatus for a tunnel, after moving the formwork to a predetermined position of the concrete lining position in the tunnel by the traveling movement of the frame, the position or posture of the formwork is detected by the detecting means, and the detecting means The form is positioned according to the detection result of.

[0011]

[Operation] In the movable formwork apparatus and the method for positioning the formwork configured as described above, when the formwork is positioned at a predetermined position in the tunnel, the formwork moves inside the tunnel due to the traveling movement of the frame. Be moved. After that, the position or posture of the mold is detected by the detecting means. Then, the actuating mechanism is actuated by the control means according to the detection result of the detecting means, and the mold is positioned and arranged at a predetermined position. Therefore, the positioning work of the mold can be performed easily and accurately in a short time without requiring skill.

[0012]

[First Embodiment] A first embodiment of a movable formwork apparatus for a tunnel embodying the present invention will be described below in detail with reference to FIGS.

As shown in FIGS. 1 and 2, the tunnel 1 has a substantially semicircular cross section, and a concrete wall 2 of a primary lining is formed on the inner peripheral surface of the tunnel 1 excluding its bottom. The mobile formwork device 3 for a tunnel is installed in the tunnel 1, and while the mobile formwork device 3 for a tunnel is moved by a predetermined distance in the longitudinal direction of the tunnel 1 (tunnel length direction), the concrete wall of the primary lining A concrete wall 4 of a secondary lining is formed on the inner peripheral surface of 2.

As shown in FIGS. 1 to 3, a pair of traveling rails 5 in the tunnel movable form device 3 are laid in parallel at the inner bottom of the tunnel 1 at a predetermined interval in the width direction. . Each traveling rail 5 is composed of a self-propelled sled portion 6 at the bottom and a supporting rail portion 7 extendingly arranged on the upper surface thereof. A pair of brackets 8 and 9 are projectingly provided on the upper surfaces of both ends of the sled portion 6, and the mounting bracket 1 is attached to their tips.
0 and 11 are rotatably supported.

One end of the chain 12 is attached to one mounting member 10, and the other end is movably attached to the other mounting member 11 via a pin 13. The spring 14 is interposed between the spring washer 15 on the pin 13 and the mounting member 11, and the spring 14 urges the pin 13 to move rightward in FIG. 3 to apply tension to the chain 12. It

As shown in FIGS. 1, 2 and 4, the frame 16 of the movable formwork device 3 is supported on the rail portion 7 of the traveling rail 5 via a plurality of wheels 17 so as to be movable. ing. The length of the traveling rail 5 is set to be about twice the length of the frame 16 in the moving direction (tunnel length direction). The plurality of supporting jacks 18 are attached and fixed to the lower portions on both sides of the frame 16, and the frames 16 are lifted and supported from the rail portion 7 by extending the jacks 18.

The traveling movement mechanism 19 is fixedly provided on both sides of the frame 16, and travels the traveling rail 5 or the frame 16 through the chain 12. That is, the bracket 20 is fixedly attached to the frame 16, and the bracket 20 rotatably supports the drive sprocket 21 and the pair of guide sprockets 22. And
The chain 12 is mounted on the drive sprocket 21 via a guide sprocket 22.

A motor 23 with an encoder is mounted on the bracket 20, and the motor 23 rotates the drive sprocket 21 via a reduction gear 24. Then, by extending the supporting jack 18, the frame 1
When the drive sprocket 21 is rotated clockwise in FIG. 4 in a state where 6 is lifted from the rail portion 7 of the traveling rail 5, a traveling force to the right is imparted to the traveling rail 5 via the chain 12. To be done. As a result, the traveling rail 5
Is self-propelled from the existing position of the secondary lining concrete wall 4 to the non-installed position along the inner bottom of the tunnel 1.

Thereafter, when the drive sprocket 21 is rotated counterclockwise in FIG. 4 while the frame 16 is being lowered and supported on the traveling rail 5 by the contraction of the supporting jack 18, when the drive sprocket 21 is rotated counterclockwise in FIG. A moving force to the right is applied to the frame 16. This allows the frame 16
Is moved on the rail portion 7 of the traveling rail 5 from the existing position of the secondary lining concrete wall 4 to the non-installed position.

As shown in FIGS. 1, 5 and 6, a pair of left and right lateral movement devices 27 are mounted on the upper surfaces of both ends of the frame 16, and a pair of left and right lateral movement devices 27 serving as a second actuator are provided above them. An electric jack 28 is supported. The mold 29 is supported on the electric jack 28, and the top foam 30 on the top, a pair of side foams 32 rotatably and rotatably attached to both ends of the foam 30 via hinges 31, and hinges 33 to the lower ends thereof. It is composed of a pair of invert foams 34 attached so as to be openable and closable.

The pair of support bases 35 in the lateral movement device 27 are arranged on the frame 16 at a predetermined interval. The pair of lateral feed bases 36 are supported on the support base 35 so as to be laterally movable, and the electric jacks 28 are mounted on their upper surfaces via saddles 37. The pair of ball screws 38 are rotatably supported by the support base 35,
It is rotated by a motor 39 as a first actuator via a speed reducer 40, a coupling 41 and a connecting rod 42. The motor 39 has an encoder (not shown). Then, according to the amount of rotation of the ball screw 38, the lateral feed base 36 is laterally moved via a nut (not shown).

The jack body 43 of the electric jack 28
Is mounted on the saddle 37 of the transverse feed base 36 via the mounting plate 44, and the ceiling foam 30 of the form 29 is supported on the movable body 45 thereof. The speed reducer-equipped motor 46 is mounted on a mounting plate 44 and is operatively connected to the jack body 43 via a coupling 47. This motor 4
Reference numeral 6 has an encoder (not shown). And
When the movable body 45 is retracted and retracted by the motor 46, the ceiling foam 30 of the mold 29 is moved in the vertical direction.

In this embodiment, the lateral movement device 2 is used.
7 and the electric jack 28 and the like constitute an operation mechanism that is operated to change the molding position of the mold 29. Further, the first and second actuators 39 and 28 at both ends of the frame 16 are independently operated.

As shown in FIG. 1, a plurality of side foam hydraulic cylinders 50 are arranged at predetermined intervals between both sides of the frame 16 and the side foam 32, and a pair of hydraulic cylinders 50 located at both ends. Is provided with an encoder for detecting the operation amount. Then, by these hydraulic cylinders 50, the side foam 32 is opened and closed between a molding position for molding the secondary lining concrete wall 4 in the tunnel 1 and a releasing position separated from the secondary lining concrete wall 4. Be moved.

A plurality of invert form hydraulic cylinders 51 are provided on both sides of the frame 16 and the invert form 3.
4 and 4 are arranged at predetermined intervals, and a pair of hydraulic cylinders 51 located at both ends are provided with encoders for detecting an operation amount. Then, by these hydraulic cylinders 51, the invert form 34 is opened and closed between a molding position for molding the secondary lining concrete wall 4 in the tunnel 1 and a releasing position separated from the secondary lining concrete wall 4. Be moved.

As shown in FIGS. 1, 2 and 7, the plurality of ceiling foam sensors 52 are attached to the outer peripheral edge of the ceiling foam 30 on the rear side in the traveling direction via brackets 53 at predetermined intervals. , The secondary lining concrete wall 4 is composed of an electrostatic capacitance type proximity switch which detects the distance from the secondary lining concrete wall 4 by the amount of electrostatic capacitance. The contact plate 54 is provided on the bracket 53 in the vicinity of the top foam sensor 52, and the spring 5 is mounted on the bracket 53.
It is arranged through 5.

Then, when the ceiling foam 30 is moved to the molding position for molding the secondary lining concrete wall 4 by the lateral moving device 27 and the electric jack 28, the sensor 52 is provided with the existing secondary covering. Concrete wall 4
And the position signals of the ceiling foam 30 are output by being opposed to each other at a predetermined interval. At this time, it is prevented that the contact plate 54 comes into contact with the secondary lining concrete wall 4 in a buffer manner to cause cracks in the concrete wall 4.

As shown in FIGS. 1 and 8, a pair of side foam sensors 56 and invert foam sensors 5 are provided.
7 is the side form 32 and the invert form 34.
Is disposed on the outer peripheral edge on the rear side in the traveling direction of. These sensors 56, 57 are composed of a detection coil 59 mounted on a bracket 58, a core 60 movably inserted and supported in the coil 59, and a contact body 61 mounted at the tip of the core 60. It is configured.

When the side foam 32 and the invert foam 34 are moved to the molding position for molding the secondary lining concrete wall 4 by the hydraulic cylinders 50 and 51, the contact bodies of the sensors 56 and 57 are arranged. 61 contacts the existing secondary lining concrete wall 4. As a result, the cores 60 of the sensors 56 and 57 are moved, and the position detection signal of the side foam 32 or the invert foam 34 is output from the detection coil 59.

As shown in FIGS. 1, 2 and 9, the three reflectors 64 are arranged at predetermined intervals on the rear end surface of the ceiling foam 30 in the traveling direction. The laser measuring device 65 is installed on the inner top surface of the existing secondary lining concrete wall 4,
The reflecting plate 64 is irradiated with laser light, and the reflected light from each reflecting plate 64 is received. Then, in the laser measuring device 65, the position or orientation of the ceiling form 30 is detected by three-dimensional coordinate measurement based on the reception of the reflected light. Each of these reflectors 6
4 and the laser measuring device 65 constitute a detecting means.

Next, the control circuit of the movable formwork apparatus constructed as described above will be explained. As shown in FIG. 10, the control device 68 as control means is composed of a microcomputer, and stores a program for controlling the operation of the entire device, position data of the ceiling form 30, and the like.

On the input side of the control device 68, the top form position detecting device comprising the laser measuring device 65, the top form gap sensor 52, the side form and invert form gap sensors 56 and 57, and the motors 23 are provided. , 3
Sensors 69 such as encoders incorporated in 9, 46, etc.,
And the operation panel 70 is connected. Further, on the output side of the control device 68, the top foam lateral movement motor 39, the electric jack motor 46, the side foam and invert foam hydraulic cylinder switching valve 71, and the rail or other movement motor 23 are connected to the drive circuit. It is connected via 72-75.

Then, the control device 68 controls the frame 1
After the formwork 29 is moved to the lining position of the secondary lining concrete wall 4 in the tunnel 1 by the traveling movement of 6, the laser measuring device 65 detects the position and posture of the ceiling foam 30 of the formwork 29. Then, the control device 68 drives the motor 39 of the lateral movement device 27 and the motor 46 of the electric jack 28 individually or in a plurality according to the detection result from the laser measuring device 65, and one side of the ceiling foam 30 or Both end sides are moved in the horizontal direction, the vertical direction, or the diagonal direction, and are arranged at predetermined molding positions for molding the secondary lining concrete wall 4.

Next, in the case where the secondary lining concrete wall 4 is sequentially formed on the inner surface of the primary lining concrete wall 2 of the tunnel 1 by using the movable formwork apparatus 3 configured as described above. The operation will be described with reference to FIG.

Now, as shown in FIG. 11A, when curing of the secondary lining concrete wall 4 formed at the predetermined lining position in the tunnel 1 is completed, the hydraulic cylinders 50 and 51 are used to form the form 29. The side foam 32 and the invert foam 34 are rotated to a releasing position separated from the secondary lining concrete wall 4. When a switch (not shown) on the operation panel 70 is turned on in this state, as shown in FIG. 11B, the electric jack 28 is contracted by a set stroke, and the ceiling foam 30 of the form 29 is covered with the secondary lining concrete. It is lowered to a release position separated from the wall 4.

After that, by the cooperation of the supporting jack 18 and the traveling movement mechanism 19, the traveling rail 5 and the frame 1 are provided.
6 is moved from the existing position of the secondary lining concrete wall 4 to the non-installed position. At this time, due to the traveling movement error of the traveling rails 5 and the frame 6, as shown in FIG. 11 (c), the form 29 is inclined with respect to the existing secondary lining concrete wall 4. In addition, there is a possibility that a positional deviation or a positional deviation occurs in the lateral direction, the vertical direction, or the tunnel length direction.

Therefore, as shown in FIG. 9, the laser measuring instrument 65 irradiates each reflecting plate 64 on the ceiling foam 30 with a laser beam, and the reflected light from each reflecting plate 64 is received by the laser measuring instrument 65. Then, the positional deviation or the attitude deviation of the top form 30 is detected by the three-dimensional coordinate measurement based on the reflected light. Then, according to the detection result, as shown in FIGS.
8 is operated separately, and the top form 30 of the formwork 29 is changed in posture so as to lower the highest level side with reference to the lowest level side. As a result, the ceiling foam 30 is arranged horizontally at the lining position of the secondary lining concrete wall 4.

Next, as shown in FIG. 11 (f), the lateral movement device 27 is operated by the control device 68, and the ceiling foam 3
0 is laterally moved and corrected, and is arranged at a position that matches the existing secondary lining concrete wall 4.

Further, as shown in FIG. 11 (g), the control device 68 controls the electric jack 2 according to the detection result.
8 is actuated, the ceiling foam 30 is moved and corrected in the vertical direction, and the ceiling foam 30 is arranged at a position that matches the existing secondary lining concrete wall 4.

Although not shown, in the case where the form is displaced in the tunnel length direction, that is, when the front side and the rear part are different in height in the tunnel length direction and are inclined, the front The operation amount of each actuator is made different between the rear side and the rear side.

By the above operation, as shown in FIG. 11 (h), the ceiling foam 30 of the form 29 is correctly positioned and arranged at a predetermined molding position for molding the secondary lining concrete wall 4. Then, the hydraulic cylinders 50 and 51 rotate the side form 32 and the invert form 34 of the form 29 to a predetermined molding position for molding the secondary lining concrete wall 4. In this state, the formwork 2
Concrete is poured between 9 and the primary lining concrete 2, and the secondary lining concrete wall 4 is molded.

As described above, in the movable formwork apparatus of this embodiment, the position of the ceiling form 30 of the formwork 29 is detected by the laser measuring instrument 65 and the reflection plate 64, and the control device is operated according to the detection result. The lateral movement device 27 and the electric jack 28 are operated by 68 to position the ceiling foam 30 at a predetermined position. Therefore, unlike the conventional configuration in which the position of the mold frame is manually corrected while the position of the mold frame is visually measured, the positioning work of the mold frame 29 can be easily performed in a short time, and the mold frame 29 is moved to a predetermined position. Can be accurately positioned.

[0043]

Second Embodiment Next, a second embodiment of a movable formwork apparatus for a tunnel embodying the present invention will be described with reference to FIGS. 12 and 13.

In the second embodiment, the tunnel 1 is formed in a circular cross section, and the primary lining concrete wall 2 is formed over the entire inner peripheral surface thereof. The frame 16 of the movable formwork device 3 does not use a rail for traveling, and the wheels 1 are attached to the inner bottom portion of the primary lining concrete wall 2.
It is arranged so as to be able to travel via 7 and is self-propelled by a motor or the like (not shown).

The form 29 is divided into a top foam 30, a pair of side foams 32, and a pair of invert foams 34, and a secondary foam is formed on the entire inner peripheral surface of the primary lining concrete wall 2. The lining concrete 4 can be molded. Side foam hydraulic cylinder 50 for opening / closing the side foam 32 between the molding position and the releasing position.
Are arranged between the frame 16 and the side foam 32. The invert form hydraulic cylinder 51 for opening and closing the invert form 34 between the molding position and the releasing position is arranged between the invert frame 34 and the side form 32 facing the invert frame 34.

Although not shown, also in the second embodiment, the laser measuring instrument 6 is used as in the first embodiment.
5, a detection device including the reflection plate 64, a control device 68, and the like are provided. Then, similarly to the case of the first embodiment, the position of the top form 30 of the form 29 is detected by the laser measuring device 65 and the reflector 64, and the lateral movement device 27 and The electric jack 28 is operated so that the ceiling foam 30 is positioned at a predetermined position.

[0047]

[Third Embodiment] Next, a third embodiment of a movable formwork apparatus for a tunnel embodying the present invention will be described with reference to FIGS.

Now, in the third embodiment, in the detecting device for detecting the position of the top form 30 of the form 29,
Although different from the above-described first embodiment, the other configurations are similar to those of the first embodiment.

That is, in the third embodiment, the detection devices 81 and 8 are provided on both front and rear surfaces in the traveling direction of the ceiling foam 30.
Two are provided. Therefore, this detection device 81, 82
More specifically, the pair of detection tables 83 are fixed to both front and rear surfaces in the traveling direction of the ceiling foam 30, and a pair of vertical rails 84 extending parallel to the vertical direction is laid on the surface thereof.

A horizontal rail 85 extending in the horizontal direction is supported by the vertical rail 84 so as to be vertically movable, and a moving base 86 is supported on the horizontal rail 85 so as to be horizontally movable. The lateral position detector 87 is mounted on the lateral rail 85, and its detection rod 88 is connected to the moving base 86. The vertical position detector 89 is mounted on one vertical rail 84, and its detection rod 90 is connected to the horizontal rail 85.

The adjusting rod 91 as a pointer is projected on a moving base 86 on the detecting device 82 located on the rear surface side in the traveling direction of the ceiling foam 30, and the existing secondary rod corresponding to the adjusting rod 91. Indicator 9 on the inner top of lining concrete 4
2 is buried. The light receiving plate 93 is attached to a moving base 86 on the detection device 81 located on the front side in the traveling direction of the ceiling foam 30, and the light receiving plate 93 is attached to the inner top of the primary lining concrete 2 so as to irradiate the light receiving plate 93 with laser light. Is provided with a laser irradiator 94.

Also in the third embodiment, similarly to the case of the first embodiment described above, the detection is performed after the frame 16 is moved from the existing position to the non-installed position of the secondary lining concrete wall 4. The positions of the ceiling foam 30 of the mold 29 are detected by the devices 81 and 82. That is, in the detection device 82 on the rear surface side in the traveling direction of the ceiling foam 30, the moving base 86 is moved in the horizontal direction and the vertical direction along the horizontal rails 85 and the vertical rails 84, and the adjusting rod 91 is aligned with the index 92. As a result, the horizontal position detector 87 and the vertical position detector 89 output position detection signals on the rear side in the traveling direction of the ceiling foam 30 according to the amount of movement of the movable table 86.

In the detector 81 on the front side in the traveling direction of the ceiling foam 30, laser light is emitted from the laser irradiator 94 toward the detector 81. And the moving table 8
6 is moved in the horizontal direction and the vertical direction along the horizontal rail 85 and the vertical rail 84, and the laser light from the laser irradiator 94 is received at a predetermined focal position on the light receiving plate 93. As a result, the horizontal position detector 8
7 and the vertical position detector 89 output position detection signals on the front side in the traveling direction of the ceiling foam 30.

Thereafter, as in the case of the first embodiment described above, the lateral movement device 27 and the electric jack 28 are operated based on the position detection signals from the detection devices 81 and 82,
The ceiling foam 30 is moved and corrected in the horizontal and vertical directions and positioned at a predetermined position.

However, in the third embodiment, the inclination of the top form 30 of the formwork 29 with respect to the horizontal plane is measured by using an inclinometer such as a level indicator (not shown). And
Based on the measurement result, the plurality of electric jacks 28 are individually operated, and the ceiling foam 30 of the form 29 is lowered on the highest level side with reference to the lowest level side, as shown in FIG. 11 (d). The posture is changed to. This allows
The ceiling foam 30 is arranged horizontally at the lining position of the secondary lining concrete wall 4. Correction of other positions or postures is the same as in the first embodiment.

Therefore, also in the third embodiment, similarly to the first embodiment described above, the positioning work of the mold 29 can be easily performed in a short time, and the mold 29 can be accurately positioned at a predetermined position. Can be positioned.

The present invention is not limited to the configuration of the above-described embodiment, but can be embodied by making the following arbitrary changes without departing from the spirit of the present invention.

(1) Change each actuator to other means such as a cylinder or a linear motor. (2) In addition to the operation panel 70 for controlling the operation of the mobile formwork device 3, a remote operation device is provided, and the mobile formwork device 3 can be remotely operated by this remote operation device. . For example, a TV camera is provided in the tunnel, a receiver for receiving a control signal and outputting an operation signal to each actuator is provided in the frame 16, and an image taken by the TV camera is displayed outside the tunnel. To provide a monitor and a transmitter for transmitting control signals. With this configuration, the work becomes easier.

(3) In the first or second embodiment, the position of the mobile formwork apparatus is constantly measured by irradiating the laser in real time, and the attitude control of the mobile formwork apparatus is running based on the measurement data. Be configured to do so.

As a result, when the traveling surface of the movable formwork device in the tunnel is extremely rough and there is a risk that the movable formwork device may come into contact with the existing concrete wall or the inner surface of the tunnel during traveling, The contact can be prevented by controlling the posture of the movable form device during traveling. Also,
By performing the position measurement in real time, it is possible to accurately measure the amount of movement of the movable formwork device by the encoder of the motor 23, which was performed in the above embodiment, by using the laser.

(4) Capacitance switch 52 shown in FIG.
Instead of using another type of switch, for example, a pressure switch that contacts the concrete wall 4 and detects the position of the ceiling foam 30 by the amount of contact pressure.

(5) Contact sensors 56, 5 shown in FIG.
Instead of 7, use another type of sensor, for example a non-contact type sensor.

[0063]

As described above in the embodiments, according to the present invention, the work of positioning the mold can be easily performed in a short time and the mold can be accurately positioned at a predetermined position. Exerts the effect.

Further, in the present invention, since the deviation of the position or the posture of the mold is detected by using the laser beam, the detection is particularly accurate.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view showing a first embodiment of a movable formwork apparatus for a tunnel embodying the present invention.

FIG. 2 is a partial front sectional view of the movable formwork apparatus of the same.

FIG. 3 is an enlarged front view showing a traveling rail in the movable form device in a partial cross section.

FIG. 4 is a partial front view showing, on an enlarged scale, a traveling movement mechanism for traveling the frame and traveling rails of the movable form device.

FIG. 5 is a partial front view showing a lateral movement device for laterally moving the top foam of the formwork.

FIG. 6 is an enlarged front view showing, in a partially sectioned manner, an electric jack for raising and lowering the ceiling foam of the mold.

FIG. 7 is a partial cross-sectional view showing, in an enlarged manner, a sensor portion for controlling the molding position of the ceiling foam of the mold.

FIG. 8 is a partial cross-sectional view showing, in an enlarged manner, a sensor portion for controlling the molding positions of the side foam and the invert foam of the mold.

FIG. 9 is a schematic perspective view showing a method for measuring the position of the top foam of the mold.

FIG. 10 is a block diagram showing a control circuit of the mobile formwork apparatus.

FIG. 11 is an explanatory view showing the operation of the mobile formwork device in sequence.

FIG. 12 is a lateral cross-sectional view showing a second embodiment of a movable formwork apparatus for a tunnel embodying the present invention.

FIG. 13 is a partial front sectional view of the movable formwork device.

FIG. 14 is a lateral cross-sectional view showing a third embodiment of a movable formwork device for a tunnel embodying the present invention.

FIG. 15 is a partial front sectional view of the movable formwork device.

FIG. 16 is a schematic perspective view showing a method for measuring the position of the top foam of the mold.

FIG. 17 is a side view showing a part of the measuring device in an enlarged manner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tunnel, 3 ... Mobile formwork apparatus, 4 ... Concrete wall of secondary lining, 5 ... Running rail, 12 ... Chain, 1
6 ... Frame, 19 ... Traveling movement mechanism, 27 ... Lateral movement device, 28 ... Electric jack constituting second actuator, 29 ... Formwork, 30 ... Top form, 32 ... Side form, 34 ... Invert form, 39 ... .. Motor as first actuator, 64 ... Reflector plate constituting detection device as detection means, 65 ... Laser measuring instrument constituting detection device as detection means, 68 ... Control device as control means, 81 ... Detecting device as detecting means, 82 ... Detecting device as detecting means.

Claims (7)

[Claims] 1. A frame disposed inside a tunnel so as to be movable in the longitudinal direction of the tunnel, a frame supported on the frame and movable between a molding position and a releasing position, and An actuating mechanism interposed between the formwork and operated to change the molding position of the formwork, a detection means for detecting the position or posture of the formwork, and a detection result of the detection means. And a control means for actuating the actuating mechanism. 2. The actuating mechanism comprises a first actuator for moving the mold in the horizontal direction and a second actuator for moving the mold in the vertical direction. Item 1. A movable formwork device for a tunnel according to Item 1. 3. The movable formwork apparatus for a tunnel according to claim 2, wherein the second actuator is a left and right pair and is independently operated. 4. The movable formwork apparatus for a tunnel according to claim 2, wherein the first and second actuators are respectively provided in front of and behind the formwork and are independently operated. 5. The detecting means is composed of a plurality of reflectors arranged on the end face of the mold and a laser measuring instrument for irradiating the reflectors with laser light for position measurement. A mobile formwork device for a tunnel according to any one of claims 1 to 4. 6. The detecting means comprises a pointer that is movably supported in the vertical and horizontal directions to direct a point on the wall surface of the tunnel, and a detector for detecting the moving amount of the pointer. A mobile formwork device for a tunnel according to any one of claims 1 to 4. 7. A movable type for a tunnel, in which a mold is movably supported between a molding position and a mold releasing position on a frame arranged to run and move in the tunnel length direction in the tunnel. In the formwork device, after the formwork is moved to a predetermined position of the concrete lining position in the tunnel by the traveling movement of the frame, the position or orientation of the formwork is detected by the detection means, and according to the detection result of the detection means. And a method for positioning a mold in a movable mold apparatus for a tunnel characterized by positioning the mold.