JP2516505B2 - Shield excavator equipped with a tubular impermeable film forming device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield excavator equipped with a tubular impermeable film forming device for covering a lining of a tunnel excavated by the shield excavator. .

[0002]

2. Description of the Related Art When a segment excavated by a shield excavator is subjected to segment lining or in-situ lining, the lining is used to prevent groundwater from entering the tunnel through seams of the lining. It is performed by covering with a water impermeable film such as a vinyl sheet.

As such a device, conventionally, a storage chamber is provided on the inner peripheral surface of a skin plate of a shield excavator, and a tubular water-impermeable membrane is folded and stored in a bellows shape in the storage chamber, A device configured to cover the tunnel lining while pulling it backwards from the storage room in accordance with the propulsion of the shield excavator, and a strip-shaped impermeable membrane with a certain width wound in the circumferential direction along the inner peripheral surface of the skin plate. A ring-shaped water impermeable film is formed by welding both ends after standing up and one lap, and the ring-shaped water impermeable film is already covered with a lining. A method of connecting to the inner surface by welding or the like has been developed.

[0004]

However, according to the former, not only is the property of the tubular impermeable membrane that can be folded into a bellows shape limited, but the length that can be stored in the storage chamber at one time is also limited. The disadvantage is that since the impermeable membrane is tubular, it cannot be stored in the containment chamber without temporarily removing the wiring, piping, and earth removal equipment inside the machine, which is a major task. In addition to requiring a lot of time and labor, the tunnel excavation work and lining formation work must be temporarily stopped during that time, resulting in a problem that work efficiency is significantly reduced.

On the other hand, the latter method uses a water-impermeable membrane having a constant width and therefore has good handleability. However, in order to wind up the strip-shaped impermeable membrane along the inner surface of the skin plate, for example, the strip-shaped impermeable membrane is used. When an attempt is made to pull out the band-shaped impermeable membrane while moving the storage cylinder that houses the membrane in a roll shape along the inner surface of the skin plate, a propulsion jack is placed on the circular movement path of the storage cylinder. Cannot be arranged because of the existence of

Further, even if the strip-shaped impermeable membrane can be wound up along the inner surface of the skin plate, the strip-shaped impermeable membrane is flexible and cannot be easily deformed to maintain the ring-like shape. There is a problem. The present invention solves such problems entirely, and provides a shield excavator equipped with a tubular impermeable film forming device capable of smoothly and accurately forming a cylindrical impermeable film by a band-shaped impermeable film. It is intended.

[0007]

In order to achieve the above object, the invention described in claim 1 of the present invention is provided with a strip-shaped water impermeable film supply port inside a rear skin plate of a shield excavator. A fixed inner cylinder is arranged to form an annular space between the fixed inner cylinder and the inner peripheral surface of the skin plate, and a water impermeable membrane outlet is provided between the skin plate and the rear end of the fixed inner cylinder. Further, a guide member in the annular space,
A guide roll of a band-shaped impermeable film that swivels circumferentially in the annular space along the guide member, and a side end of the band-shaped impermeable film that swivels along the guide member after the guide roll. With a shield excavator equipped with a welder
As the shield excavator moves forward,
The band-shaped impermeable membrane is spirally sent by rotating the
It was configured to form a tubular impermeable membrane while taking it out.
It is characterized by the following. In addition, claim 2 of the present invention
In the invention described in, the fixed inner cylinder body and the skin plate
Of the band-shaped impermeable membrane that swirls in the annular space between the peripheral surfaces
Welding of guide roll and swivel movement following the guide roll
In a shield excavator equipped with
Install a tail plate at the rear end of the
Connect the impermeable membrane outlet to the outer peripheral surface of the front end of the tail plate.
Passing and forming lining in this tail plate
It is characterized in that it is configured to send out backward
It is something.

Further, the invention described in claim 3 of the present invention is
A fixed inner cylinder is disposed inside the rear skin plate of the shield excavator to form an annular space between the fixed inner cylinder and the inner peripheral surface of the skin plate, and the rear end of the skin plate and the fixed inner cylinder. A water-impermeable membrane outlet is provided between the guide member and the annular space portion, and a strip-shaped water-impermeable membrane wound layer roll body that swirls in the annular space portion along the guide member in the circumferential direction, A side end welder of a band-shaped impermeable membrane that swivels along the guide member following the roll body is disposed,
Furthermore, a shield excavator having an opening for exchanging the band-shaped impermeable film-wound layer roll body in place of the fixed inner cylinder ,
Similar to the invention described in claim 1, the shield excavator
The band-shaped impermeable film-wound layer roll body is swung as it advances.
By sending the strip-shaped impermeable membrane in a spiral shape
Characterized by forming a tubular impermeable membrane
It is what Further, the invention described in claim 4, upper
An annular space between the fixed inner cylinder and the inner peripheral surface of the skin plate
Band-shaped impermeable film wound layer roll body that swirls in the inside and the roll
A seal with a welder that pivots following the body
In the excavator, the tail plate is attached to the rear end of the fixed inner cylinder.
The rear side of the water impermeable membrane, and
This is connected to the outer peripheral surface of the front end of the
Sending backwards while forming a lining in the tail plate
It is characterized by being configured as described above.

[0009]

In the first aspect of the invention, the belt-shaped impermeable membrane is supplied into the annular space from the supply port formed in the fixed inner cylindrical body and is suspended over the guide roll, and the guide roll is guided. When it is moved in the circumferential direction along the member, the strip-shaped water impermeable film hung on the guide roll is wound up along the inner peripheral surface of the skin plate while being pulled out from the supply port as the guide roll moves. At this time, the welder moves in the circumferential direction integrally with the guide roll after the guide roll,
The peripheral edge of the impermeable membrane wound up first is welded to and integrated with the opposing peripheral edge of the impermeable membrane rolled up next.

The strip-shaped impermeable film is wound up in accordance with the excavation of the shield excavator. In this case, the shield excavator is temporarily stopped at a constant excavation length of the shield excavator and the strip-shaped impermeable film is ringed. Jo to one volume shore may be performed to form a tubular impermeable film by by the fuser <br/> Te connecting opposite peripheral edges of the ring-shaped impermeable film, in claim 1
As described, it is preferable to spirally wind the tubular impermeable membrane while moving the guide rolls in the circumferential direction in accordance with the promotion of the shield excavator. The tubular impermeable membrane can be continuously formed while pulling out the strip-shaped impermeable membrane in synchronization with the excavation speed. On the other hand, claim 2
As described above, attach the tail plate to the rear end of the fixed inner cylinder.
The water impermeable membrane outlet is extended toward the rear and is connected to the tail.
This plate is connected to the outer peripheral surface of the front end of the plate and
I will send it back while forming a lining in the rule plate
By constructing it like this, the tubular impermeable membrane and the lining
That can prevent damage to the impermeable membrane by eliminating the friction resistance of
It is.

Since the guide member of the guide roll, the driving means for the guide roll, etc. can all be arranged in the annular space between the skin plate and the fixed inner cylinder, the inner peripheral side of the fixed inner cylinder is prevented. Equipment such as propulsion jacks can be placed inside the machine in the same way as a conventional shield excavator, and there is no hindrance to the supply and winding of the band-shaped impermeable membrane. The impermeable membrane wound around is supported on the fixed inner cylindrical body and maintains a predetermined wound shape, and accurate winding can be smoothly performed.

In the third and fourth aspects of the present invention,
In place of the guide roll in the first and second inventions, the band-shaped impermeable film-wound layer roll body is moved circumferentially along the guide member in the annular space portion between the skin plate and the fixed inner cylindrical body. The tubular impermeable film is formed in the same manner as above while pulling out the band-shaped impermeable film directly from the band-shaped impermeable film-wound layer roll body.

[0013]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 3, reference numeral 1 denotes a shield excavator, in which a fixed inner cylinder body 3 is arranged in a rear body portion 2c of a skin plate 2 thereof, and a front end of the fixed inner cylinder body 3 is arranged in the rear body portion 2c. The rear body 2c and the fixed inner cylinder 3 are integrally fixed to a ring plate 4 fixed to the peripheral surface to form an inner and outer double cylinder. These rear body 2c and the fixed inner cylinder are formed. An annular space portion 5 is provided between the peripheral surfaces facing each other.

Reference numeral 6 denotes a strip-shaped impermeable film supply port opened at a proper position of the fixed inner cylindrical body 3, and has an opening width in the front-rear direction slightly longer than that of the strip-shaped impermeable membrane 7. Further, at the rear end of the annular space portion 5, a ring bracket 8 is integrally fixed on the fixed inner cylindrical body 3 over the entire circumference, and the ring bracket 8 and the rear end of the rear body portion 2c of the skin plate 2 are fixed. A space between the opposing surfaces is formed as an outlet 9 of a water impermeable film, and a tail plate 10 of a predetermined length is integrally extended rearward from the rear end of the outer periphery of the ring bracket 8. Is exposed to the outer peripheral surface of the tail plate 10.

Reference numeral 11 denotes a guide member composed of a guide roll which is rotatably supported on the fixed inner cylindrical body 3 in the annular space 5 at regular intervals in the circumferential direction via brackets. They are arranged in two rows with a spacing wider than the front and rear opening width. The guide member 11 may be a guide rail fixed on the fixed inner cylindrical body 3 instead of the guide roll.

Numerals 12 and 13 are roller chains suspended in a circular endless manner on the front and rear guide members 11, respectively, and an annular space 5 is formed between the front and rear roller chains 12 and 13 at appropriate positions.
A guide roll 14 having a diameter slightly smaller than the space thickness of the guide roll 14 is rotatably installed, and the guide roll 14 is positioned near the rear end of the guide roll 14 in the traveling direction, that is, at the rear end. The band-shaped impermeable film 7 is provided in the vicinity of the side roller chain 13.
A pressing roller 15 is provided that elastically presses the peripheral edge portion of the rear body portion 2c toward the inner surface of the rear body portion 2c.

The guide roll 14 has a central shaft 14a protruding forward, and the central shaft 14a is connected to a water impermeable film rewinding motor 16 mounted on the front roller chain 12.
It is configured to be forced to rotate by 16,
The pressing roll 15 is rotatably supported by the tip of a bracket 17 integrally fixed to the rear roller chain 13.

Numeral 18 is a welder which is mounted on the rear roller chain 13 in the vicinity of the rear of the pressing roller 15 in the same manner as the pressing roller 15, and is wound next to the impermeable membrane 7 previously wound up. The peripheral edge of the water impermeable membrane 7 is integrally welded.

Reference numeral 19 denotes a fixed inner cylindrical body 3 facing the supply port 6.
The support bracket 20 is integrally fixed to an appropriate position on the inner peripheral end of the ring plate 4 with a winding layer roll of the band-shaped water impermeable film 7 arranged in the machine on the inner peripheral side of the support bracket 20, and the support bracket 20 is rotatably supported on the support bracket 20. It has been done. The strip-shaped water impermeable film 7 wound around the winding layer roll 19 is pulled out from the winding layer roll 19 by the rotational movement of the guide roll 14 in the circumferential direction as described later.

At this time, when the band-shaped impermeable film 7 is wound once to form a ring-shaped impermeable film, the central axis 19a of the roll 19 is arranged in parallel with the central axis 14a of the guide roll 14. However, in the case where the strip-shaped impermeable membrane 7 is continuously spirally driven by the propulsion of the shield excavator 1, as shown in the drawing, the axial direction of the shield excavator 1 is directed toward the rear end side. It is arranged so as to be inclined in the inner diameter direction.

Reference numeral 21 denotes an opening portion provided at a proper position of the fixed inner cylindrical body 3 other than the supply port 6, and a pair of front and rear sprockets 22 are provided on the inner peripheral surface of the fixed inner cylindrical body 3 at the front and rear end sides of the opening portion 21. The rotary drive shaft 24 to which 23 is attached is rotatably supported,
A part of the outer circumference of these sprockets 22 and 23 is passed through the opening 21 to the front and rear roller chains 12 and 13 in the annular space 5.
The rotary drive shaft 24 is connected to a chain drive motor 25 disposed on the inner peripheral surface of the fixed inner cylindrical body 3, and the front and rear roller chains 12 and 13 are circumferentially endless by the motor 25. It is configured to travel and move in a state of shape.

Reference numeral 26 denotes a water impermeable film splicing welder arranged on the supply path of the band-shaped water impermeable film from the water impermeable film winding layer roll 19 to the supply port 6, and is attached to the support bracket 20. The starting end of the strip-shaped impermeable film 7 to be supplied next is connected to the end of the strip-shaped impermeable film 7 of a predetermined length previously supplied. A water impermeable film support roller 27 is rotatably supported by the fixed inner cylindrical body 3 in the circumferential direction at regular intervals.

Reference numeral 28 denotes a plurality of propulsion jacks arranged in the shield excavator 1 along the inner peripheral surface of the fixed inner cylindrical body 3 at regular intervals in the circumferential direction. The ring plate 4 and the fixed inner cylindrical body 3 are mounted on a rear ring plate 29 protruding from the inner peripheral surface of the rear end portion of the tail ring 10 and fixed in a penetrating state. A press ring 30 that moves back and forth along with is mounted, and a plurality of press jacks 31 are integrally arranged in an embedded state on the outer peripheral side of the press ring 30 at appropriate intervals in the circumferential direction,
A ring-shaped end plate 32 attached to the end of the rod is arranged so as to project rearward from the rear end surface of the outer peripheral portion of the press ring 30.

The skin plate 2 of the shield excavator 1 is divided into a front body portion 2a, a middle body portion 2b, and the rear body portion 2c, which are flexibly connected to each other by intermediate folding jacks 33, 34. Although the middle body portions 2b are further connected by the double-acting slide jack 35, the middle body portions 2b may be divided into two instead of three, or one skin plate.

Further, the circular cutter plate 36 disposed at the open end of the front body portion 2a of the skin plate 2 is rotatably attached to the partition wall 37 stretched in the middle portion of the inner peripheral surface of the front body portion 2a. Cutter plate drive motor supported and arranged on the back side of the partition wall 37
It is constructed so that it can be rotated by 38, and the excavated earth and sand is properly excavated by a screw conveyor or the like.
It is configured to be discharged inside the machine by 39.

Next, a method of applying a cast-in-place concrete lining 40 to the inner wall surface of the tunnel excavated by the thus constructed shield excavator and coating the outer peripheral surface of the lining 40 with the tubular impermeable membrane 7A. Will be described in detail. First, the shield excavator 1 excavates the face ground by rotating the cutter plate 36 by the cutter plate drive motor 38, and at the same time, mounts the press ring 30 of the propulsion jack 28 on the front end surface of the form 41 assembled in the tail plate 10. The propelling jack 27 is made to abut, the reaction force is supported by the form 41, and the propelling jack 27 is extended to advance.

Simultaneously with the start of the excavation of the shield excavator 1, the front and rear roller chains 1 are guided along the guide member 11 by driving the chain drive motor 25 in synchronization with the excavation speed.
When the rollers 2 and 13 are moved in the circumferential direction, the roller chains 12 and 1
The guide roll (14) installed between the three, the pressing roller (15) and the welder (18) following the guide roll (14) move integrally in the same direction.

As shown in FIG. 2, the guide roll 14 is provided with a strip-shaped impermeable film 7 having a constant width from the winding layer roll 19 through the supply port 6. Therefore, the guide roll 14 is covered with the shield excavator 1 When the unwinding motor 16 is driven while moving in a turning direction at a predetermined speed in synchronism with the excavation speed of, the strip-shaped impermeable film 7 pulled out from the winding layer roll 19 causes the support roller 27 on the fixed inner cylindrical body 3 to move. While being looped over the guide roll 14 via the guide roll 14, the pressing roller 15
It is continuously drawn to the side at a constant drawing speed.

At this time, the guide roll 14 is the shield excavator 1
Since it swivels in the circumferential direction during the excavation, the strip-shaped impermeable film 7 is pulled out from the guide roll 14 in a spiral shape, and the peripheral edge on the rear end side is spirally wound up in the annular space portion 5 first. The water impermeable film 7 is superposed on the peripheral edge on the front end side, and its overlapping portion is pressed by the pressing roller 14 to the tail plate.
While being pressed and held against the inner surface of 10, the subsequent welder 18 continuously welds to form a tubular impermeable membrane 7A.

The width of the strip-shaped water impermeable film 7 is formed at a pitch of the shield excavator 1 by one extension of the propulsion jack 28, that is, one to one half of the concrete lining length. When the width is formed to be the same as the lining length of the concrete lining 40, the band-shaped impermeable membrane 7 is wound up in a spiral of one roll in one digging pitch of the shield excavator 1 and halved. In the case of having a width of 1, the spiral winding is performed twice in one excavation length. in this case,
It is preferable that the strip-shaped impermeable film 7 is formed so as to be wound up in a spiral shape twice during one digging length. As shown in the figure, the band-shaped impermeable film 7 has a width half the digging length. Can be used to shorten the length of the annular space 5 in the front-rear direction, and thus the overall length of the shield excavator 1 can also be shortened.

If the strip-shaped impermeable membrane 7 having a winding length of three times or more is wound on the winding layer roll 19 for supplying the strip-shaped impermeable membrane 7, the stationary inner cylindrical body 3 is supported. In some cases, the strip-shaped impermeable film 7 may be wound on the roller 27 in a superposed state, and the supply to the guide roll 14 side may not be smoothly performed. It is preferable that the water impermeable membrane 7 is wound. 3 times or more
When the water-impermeable membrane 7 having the length to be rolled up is wound in a layer,
Cut every two minutes. When the supply of the strip-shaped impermeable membrane 7 is completed, the roll 19 wound with the next strip-shaped impermeable membrane 7 is replaced, and the feeding start end of the strip-shaped impermeable membrane 7 wound on the roll is fed first. The end of the water permeable membrane 7 is superposed and connected by the splicing welder 26, thus making it possible to continuously supply the strip-shaped water impermeable membrane 7 to the guide roll 14 side.

In this way, as the shield excavator 1 advances, the band-shaped impermeable film 7 is superposed on the front side peripheral edge of the water impermeable film 7 which is previously spirally wound in the annular space, and the rear side peripheral edge thereof,
A cylindrical impermeable membrane 7A is formed by spirally winding up while welding, and this cylindrical impermeable membrane 7A is drawn from the outlet 9 to the outer peripheral surface of the tail plate 10 according to the propulsion of the shield excavator 1. A cylindrical impermeable membrane 7A that is continuously sent out and further pushed out from the tail plate 10 into the rear tunnel by the shield excavator 1 is pushed onto the concrete lining 40 that is pulled rearward through the tail plate 10. It is what makes me.

In order to form the lining 40 with the cast-in-place concrete in the tail plate 10, the shield excavator 1 advances and propels the propelling jack 28 by one extension, and then, as shown in FIG. A space for forming a lining is provided on the inner peripheral surface side of the tail plate 10 by contracting the rods 28.

Next, the formwork previously assembled in this space
The next frame 41 is assembled while being connected to 41, and the front end surface of the frame 41 is brought into close contact with the press ring 30 of the propulsion jack 28. Then, concrete is poured from the inside of the machine between the facing surfaces of the tail plate 10 and the form 41 through a concrete placing hole (not shown) formed at an appropriate position of the form 41.

On the rear end side, the poured concrete continues to the already placed concrete lining 40,
At the front end side, it is received by the ring-shaped gable plate 32 of the press jack 31, and by extending the press jack 31, the ring-shaped gable plate 32 compresses the poured concrete into a consolidated state.

After the concrete lining 40 has been formed in the tail plate 10 in this way, the propulsion jack 28 is extended to propel the shield excavator 1 to advance the tunnel by one digging and digging, and the concrete lining 40 is made in accordance with the digging. The tubular water impermeable membrane 7A is coated from above the tail plate 10 between the outer peripheral surface of the tail plate 10 and the wall surface of the excavated ground while being fed out from the inside.

In the above embodiment, the tubular water impermeable film is formed by continuously winding the band-shaped impermeable film 7 while moving the guide roll 14 at a predetermined turning speed simultaneously with the start of the excavation of the shield excavator 1. Although 7A is formed, the strip-shaped impermeable membrane 7 having a width corresponding to the excavation length may be wound up in a ring shape at a constant excavation length without being spirally wound up.

In this case, while the shield excavator 1 is stopped to excavate, the guide roll 14 is swung once along the guide member 11 to wind the strip-shaped impermeable film 7 to form a ring-shaped impermeable film. At that time, the peripheral edge of the ring-shaped impermeable film 7 wound around the front end side of the ring-shaped impermeable membrane formed in the ring-shaped impermeable membrane 7 at the rear end side is superposed so that the pressing roller is pressed in the same manner as above. While being pressed by 15, they are welded by the welder 18 to form the tubular impermeable membrane 7A.

After forming this ring-shaped impermeable film, the shield excavator 1 is propelled to send the cylindrical impermeable film 7A backward from the outlet 9 onto the tail plate 10 and cover the concrete lining 40 in the same manner as above. It is what makes me.

Next, FIGS. 6 and 7 show another embodiment of the present invention. As in the above embodiment, a wound layer roll is provided inside the impermeable membrane supply port 6 of the fixed inner cylindrical body 3. The strip-shaped impermeable film-wound layer roll body 44 is replaced with the guide roll 14 without disposing 19
Is rotatably installed between the front and rear chain rollers 12 and 13, and the rotation center shaft 44a thereof is rotationally driven by the water impermeable film rewinding motor 16 as in the above embodiment.

In this case, the supply port 6 in the above embodiment becomes the exchange port 46 of the wound layer roll body 44. Other configurations are the same as those in the above embodiment. According to the tubular impermeable film forming apparatus configured as described above, the length of the band-shaped impermeable film 7 is not limited to that of the band-shaped impermeable film 7 and is several times to several tens of times that of the band-shaped impermeable film 7 in the above-described embodiment. In the same manner as in the above-described embodiment, the roll-shaped roll body 44 is swirled in a spiral direction by rotating the wound-layer roll body 44 in accordance with the progress of the shield excavator 1. Tubular impermeable membrane
7A can be continuously formed. In this case, if the strip-shaped impermeable film 7 wound around the wound layer roll body 44 disappears,
Replace with the next wound layer roll body, and strip-shaped impermeable membranes 7, 7 of both
The terminal end and the starting end may be placed in a superposed state and appropriately connected integrally by a welding device or the like.

When the shield layer excavator 1 is stopped at every constant excavation length of the shield excavator 1 and the wound layer roll body 44 is swung once to wind the strip impermeable membrane 7 once in a ring shape, After cutting with an appropriate cutting tool for each winding length, the ring-shaped closed both ends may be integrally connected in a polymerized state using a welding device or the like. The coating of the tubular impermeable membrane 7A thus formed on the concrete lining 40 is the same as that in the above-mentioned embodiment, and therefore its description is omitted.

In both of the above embodiments, the cast-in-place concrete lining 40 is formed in the tail plate 10 and the concrete covering tool 40 is coated with the tubular impermeable membrane 7A. The segment lining is assembled in the plate 10, and the shield excavator 1 is driven forward while extending the propulsion jack 28 by applying a reaction force to the segment lining, and the same as the above on the outer peripheral surface of the segment lining pushed out from the tail plate 10. The tubular impermeable membrane 7A may be coated on the.

[0044]

As described above, according to the shield excavator equipped with the tubular water-impermeable film forming apparatus of the present invention, the fixed inner cylindrical body is disposed inside the rear skin plate of the shield excavator main body. A band-shaped impermeable film guide roll or a band-shaped impermeable film wound layer roll body is swung in the circumferential direction along the guide member in the annular space formed between the facing surfaces of the fixed inner cylindrical body and the skin plate. Since it is freely arranged and a supply port or exchange port for the band-shaped impermeable membrane is provided in the fixed inner cylinder, it does not interfere with the power wiring and earth removal equipment, etc. installed in the shield excavator and into the annular space. The strip-shaped impermeable film can be smoothly supplied, and in addition, a guide roll of the strip-shaped impermeable film or a roll body in which the strip-shaped impermeable film is wound in the annular space can be accurately circumferentially aligned along the guide member. Rolling the band-shaped impermeable membrane into a cylinder while swirling it It is possible.

Further, the impermeable membrane wound up in a tubular shape is supported on the fixed inner tubular body and can be maintained in a predetermined rolled up shape without being deformed, and is guided in the annular space. Since the side end welder of the water impermeable film is arranged so as to be able to swivel along the guide member following the roll or the roll body, the side edge peripheral edge of the water impermeable film wound up first is next. The opposite peripheral edge of the water-impermeable film to be wound up can be continuously welded simultaneously with the winding process.

By rotating the guide roll or the roll body in accordance with the excavation of the shield excavator, the impermeable film wound next to the tubular one is spirally connected to the impermeable film wound next. However, the tubular impermeable membrane can be continuously formed, and the tubular impermeable membrane can be formed at the same time as tunnel excavation by the shield excavator, so that tunnel excavation and lining work can be performed efficiently. Is.

Further , since the water impermeable film outlet is provided between the skin plate of the shield excavator and the rear end of the fixed inner cylinder, the cylindrical water impermeable film wound up in the annular space is shielded. It can be continuously and automatically sent backward from the outlet according to the excavation of the excavator, and further, by extending the tail plate from the fixed inner cylinder to the rear side of the skin plate, While sending the formed lining into the tunnel, it is possible to cover the outer surface of the lining with a tubular impermeable film through the tail plate, thus eliminating the frictional resistance between the tubular impermeable film and the lining.
Te is capable of preventing damage to the impermeable film.

[Brief description of drawings]

FIG. 1 is a simplified vertical sectional side view of a shield excavator,

FIG. 2 is a vertical cross-sectional front view of a tubular impermeable film forming device portion,

FIG. 3 is a vertical cross-sectional side view of a portion from the band-shaped impermeable film supply section to the lining formation section,

FIG. 4 is a vertical sectional side view showing a state in which a lining is formed,

FIG. 5 is a vertical sectional side view showing a state in which the shield excavator is propelled,

FIG. 6 is a vertical sectional side view of a shield excavator equipped with another tubular water-impermeable film forming apparatus of the present invention;

FIG. 7 is a vertical cross-sectional front view of the tubular impermeable film forming apparatus portion.

[Explanation of symbols]

 1 Shield excavator 2 Skin plate 3 Fixed inner cylinder 5 Annular space 6 Supply port 7 Band-shaped impermeable membrane 9 Drawout port 10 Tail plate 12, 13 Roller chain 14 Guide roll 18 Welder

Claims (4)

(57) [Claims] 1. A fixed inner cylindrical body having a strip-shaped impermeable membrane supply port is provided inside a rear skin plate of a shield excavator, and an annular shape is provided between the fixed inner cylindrical body and an inner peripheral surface of the skin plate. A space is formed, and a water-impermeable film outlet is provided between the skin plate and the rear end of the fixed inner cylinder. Further, a guide member is provided in the annular space, and an annular space is provided along the guide member. Shield excavation is provided by arranging a guide roll of a strip-shaped impermeable film that swivels in the circumferential direction and a side end welder of the strip-shaped impermeable film that swivels along the guide member after the guide roll. As the machine advances, the guide rolls
The band-shaped impermeable membrane is spirally sent out by rotating the
A shield excavator equipped with a tubular water impermeable film forming apparatus, which is characterized in that it is configured to form a tubular water impermeable film. 2. A fixed inner cylinder having a strip-shaped impermeable membrane supply port is provided inside the rear skin plate of the shield excavator, and an annular shape is provided between the fixed inner cylinder and the inner peripheral surface of the skin plate. A space is formed, and a water-impermeable film outlet is provided between the skin plate and the rear end of the fixed inner cylinder. Further, a guide member is provided in the annular space, and an annular space is provided along the guide member. A proposal for a strip-shaped impermeable membrane that swirls in the circumferential direction
An inner roll and a side end welder of a strip-shaped impermeable film that swivels along the guide member after the guide roll are provided, and a tail plate is provided at the rear end of the fixed inner cylinder rearward.
Extending toward the tail play of the impermeable membrane outlet
The front end of the
A structure to form a lining in the rate and send it back
Shield excavator having a tubular impermeable film forming apparatus characterized by form was. 3. A rear skin plate of a shield excavator
The fixed inner cylinder is disposed inside and the fixed inner cylinder and the skin plate are
An annular space is formed between the inner peripheral surfaces of the
An impermeable membrane outlet is installed between the rate and the rear end of the fixed inner cylinder.
A guide member in the annular space, and the guide member
Strips that move in a circular direction in the annular space along the
The water-impermeable film-wound layer roll body and the roll body followed by the roll
Side edge melting of the strip-shaped impermeable membrane that swirls along the id member.
And a belt-like device at the appropriate place of the fixed inner cylinder.
An opening for exchanging the water-impermeable film-rolled layer roll body is provided, and as the shield excavator advances, the band-shaped water-impermeable film roll is swirled to spirally feed the band-shaped water-impermeable film into a tubular water-impermeable film. That is configured to form
A shield excavator equipped with a characteristic tubular impermeable film forming device . 4. A rear skin plate of a shield excavator
The fixed inner cylinder is disposed inside and the fixed inner cylinder and the skin plate are
An annular space is formed between the inner peripheral surfaces of the
An impermeable membrane outlet is installed between the rate and the rear end of the fixed inner cylinder.
A guide member in the annular space, and the guide member
Strips that move in a circular direction in the annular space along the
The water-impermeable film-wound layer roll body and the roll body followed by the roll
Side edge melting of the strip-shaped impermeable membrane that swirls along the id member.
And a belt-like device at the appropriate place of the fixed inner cylinder.
An opening for exchanging the water-impermeable film roll is opened, and a tail plate is extended rearward at the rear end of the fixed inner cylinder so that the water-impermeable film outlet communicates with the outer peripheral surface of the front end of the tail plate. In addition, it is characterized in that it is configured to send out backward while forming a lining in this tail plate .
A shield excavator equipped with a tubular impermeable film forming device .