JPH0223680Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is designed to prevent water-impermeability when covering the outer periphery of the lining segment of a tunnel constructed by the shield method with an impermeable membrane such as vinyl for waterproofing. The present invention relates to a water-impermeable membrane bonding device for sequentially bonding membranes.

[Conventional technology] To explain the shield construction method as an example, the current shield construction method excavates a tunnel face with a cutter at the front end of a shield excavator, and while holding the face, shield excavation is carried out by the thrust of a shield jack at the rear. As the machine moves forward, the segments are assembled at the rear of the shield excavator to complete the lining, and the gap between the lining and the surrounding ground is filled with backfilling material. I have to.

However, in the above-mentioned shield construction method, water often leaks into the tunnel from the joints or cracks of the segments during or after construction, and for this reason, water leakage prevention work has traditionally been required at the time of or after the completion of the shield construction. Furthermore, when groundwater overflows into the void between the segment and the ground, problems arise, such as the backfilling material injected into the tail void may be diluted by the groundwater.

In an attempt to solve this problem, recently, an impermeable membrane made of vinyl, polyethylene, etc. is placed in the gap between the segment and the ground as the shield tunneling machine moves to cover the entire circumference of the segment. is being carried out.

If the entire circumference of the segment is covered with an impermeable membrane and a backing material is filled between the impermeable membrane and the segment, the impermeable membrane prevents groundwater from reaching the outer surface of the segment and prevents the joint of the segment. The problems mentioned above, such as water leakage from the parts, will no longer occur.

A conventional device for covering the outer periphery of a segment with an impermeable membrane such as vinyl, as shown in FIG. A cylindrical impermeable membrane d is folded and stored in the permeable membrane storage part c, and can be pulled out from the rear end of the impermeable membrane storage part c along the inner surface of the shield frame b to propel the shield tunneling machine a. An impermeable membrane d is drawn out into a gap (tail void) g between the accompanying segment e and the ground f, so as to cover the entire circumference of the segment e. In the figure, h is a tail seal and i is a shield jack.

However, the conventional water-impermeable membrane coating device described above has the following drawbacks because the water-impermeable membrane storage portion is provided within the shield frame b of the shield excavator a.

The tail void g is larger than that of a normal shield by the amount of the water-impermeable membrane housing portion c. That is,
Since the impermeable membrane housing part c is provided between the outer surface of the segment e and the shield frame b, the outer diameter of the shield frame b increases by the thickness of the water impermeable membrane housing part c. Therefore, the amount of excavation,
As the amount of waste soil increases, the amount of backfilling required also increases.

From the above, the thickness of the impermeable membrane storage part c cannot be increased too much, and since the impermeable membrane storage part c is incorporated inside the shield frame b of the shield tunneling machine a, the size of the impermeable membrane storage part c is Due to certain restrictions, it cannot take up a large amount of space. Therefore, the impermeable membrane d
It is not possible to increase the amount of storage.

Since the impermeable membrane storage part c is provided inside the shield excavator a, the structure of the installation location of the impermeable membrane d becomes complicated due to the conflict with the equipment of the main body of the shield excavator a. Part c
It takes time to incorporate.

Therefore, recently, an impermeable membrane having an appropriate length was arranged and laid in a cylindrical shape at the front position of the already assembled segment, and the impermeable membrane was joined to the already laid impermeable membrane, and the joined impermeable membrane was A method has been considered in which the outer periphery of the segment is sequentially covered with a film.

[Problems to be Solved by the Invention] However, no device has been devised so far to efficiently join the water-impermeable membranes at the front positions of the segments.

The present invention was developed in view of such actual circumstances.

[Means for Solving the Problems] The present invention provides a rotating frame that can rotate along the inner periphery of the shield tail frame at a predetermined position within the shield tail frame of the shield tunneling machine,
Moreover, it has a configuration in which a water-impermeable membrane bonding machine is attached to the rotating frame.

[Function] Therefore, the welding machine rotates together with the rotation of the rotating frame, and the laps of the water-impermeable membranes are welded.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

1 and 2, 1 is a shield tunneling machine, 2 is a shield frame of the shield tunneling machine 1, 3 is a shield jack, 4 is a tail seal, 5 is a segment, and 6 is the outer periphery of the segment 5. 7 is an impermeable membrane laid at the position covering the segment 5; 7 is a backing material injection device for injecting backing material 9 into the tail void formed between the impermeable membrane 6 and the ground 8; 10 is an impermeable membrane; This is an injection port for injecting a backing material between the membrane 6 and the outer periphery of the segment 5.

In the present invention, an internal gear 13 is provided on the outer side of the rear part of the reinforcing ring frame 11 provided in the shield frame 2, that is, inside the shield tail frame 2', and an impermeable membrane bonding machine is installed at required locations on the inner side. 12 attached to the ring-shaped rotating frame 14
are arranged at a required interval in the axial direction with respect to the ring frame 11, and the ring frame 11
The shaft 16 of the motor 15 installed in the rotating frame 1
A pinion 17 that meshes with the internal gear 13 is attached to the shaft 16, and a support frame 18 is provided protruding from the rear side of the ring frame 11, and the rotating frame is mounted on the support frame 18. An appropriate number of guide rollers 19 are provided in the circumferential direction in contact with the inner periphery of the shield tail frame 14 to guide the rotating frame 14, so that the rotating frame 14 can rotate along the inner periphery of the shield tail frame 2' by driving the motor 15. ing. The welding machine 12 is biased by a spring or the like with a required pressing force toward the inner wall of the shield tail frame 2'. 2 in the diagram
0 is a bearing that supports the shaft 16, and 21 is a support frame that projects from the rear side of the ring frame 11 to support the bearing 20.

Further, a guide rail 24 is provided on the rear side of the ring frame 11 to protrude in the axial direction via a support frame 23, and a piece 26 to which an impermeable membrane bonding machine 25 is attached is slidably engaged with the guide rail 24. By screwing the screw shaft 27 through the piece 26 and driving the screw shaft 27 with the motor 22, the joining machine 25 can be moved in the axial direction through the sliding movement of the piece 26. Configure it like this.

In such a configuration, an impermeable membrane 6' having a unit length is laid in a cylindrical shape between the ring frame 11 and the rotating frame 14 along the inner circumference of the shield tail frame 2'. At this time, the impermeable membrane 6' is
It is made to wrap in the axial direction with the water-impermeable membrane 6 that has already been laid (wrapped part X), and also to wrap around the circumferential ends (wrapped part Y). In addition, when laying the impermeable membrane 6', use the bonding machine 1.
2 and 25 are clamped and separated from the surface on which the impermeable membrane is to be laid, and the membranes are laid so that the lap part do.

Therefore, if the motor 15 is driven in this state,
The rotating frame 14 rotates while being guided by the guide rollers 19 through the meshing of the pinion 17 and the internal gear 13, so that the welding machine 1
2, the lap portions X of the impermeable membranes 6' and 6 are joined together in the circumferential direction. On the other hand, when the motor 22 is driven, the piece 26 slides in the axial direction along the guide rail 24 due to the rotation of the screw shaft 27. Using this sliding movement of the piece 26, the lap portion Y is attached by the welding machine 25. Join. In this way, the circumferential connection of the wrap portions X and the axial connection of the wrap portions Y can be easily performed. Once the lap portions X and Y have been joined, the shield jack 3 is extended to move the excavator 1 forward, and the work of laying and joining the impermeable membrane 6' is repeated in the same manner as described above. Of course, during this time, the segment 5 is
assembly work will be carried out.

The movement of the welding machine 25 in the axial direction may be performed by a rack and pinion type, a cylinder direct drive type, or the like.

FIG. 3 shows another embodiment of the present invention, which is suitable for cases where a cylindrical membrane is used in advance for the impermeable membrane 6' or where the joining of the lap portion Y is performed manually. That is, the welding machine 1 relative to the rotating frame 14
2 and the internal gear 13 are reversed on the left and right from the case in FIG.

If such a system is used, the rotating frame 14, internal gear 13, pinion 17,
A bonding machine 12 and the like is housed therein, and the impermeable membrane 6' can be directly bonded to the impermeable membrane 6 coated on the segment 5, and the shield tail frame 2'
The length of can also be shortened.

The bonding machines 12 and 25 in the above embodiments may be of any type, such as an ultrasonic type, a high frequency type, or an electric heating type.

[Effects of the invention] As explained above, the water-impermeable membrane bonding device of the present invention has the advantage that water-impermeable membranes can be bonded efficiently, easily, and reliably by rotating the rotating frame. It can have a great effect.

[Brief explanation of drawings]

Fig. 1 is a cutaway side view of a shield tunneling machine equipped with the impermeable membrane bonding device of the present invention, Fig. 2 is a partially broken view taken along the line - in Fig. 1, and Fig. 3 is another embodiment of the present invention. An explanatory diagram of an example, FIG. 4 is an explanatory diagram of a conventional water-impermeable membrane coating device. 1 is a shield tunneling machine, 2' is a shield tail frame, 6 and 6' are impermeable membranes, 12 is a joining machine, 1
3 is an internal gear, 14 is a rotating frame, 15 is a motor, 16 is a shaft, and 17 is a pinion.

Claims (1)

[Scope of utility model registration request] A rotary frame capable of rotating along the inner periphery of the shield tail frame is disposed at a predetermined position in the shield tail frame of the shield tunneling machine, and an impermeable membrane bonding machine is attached to the rotary frame. Water permeable membrane bonding equipment.