JP3522230B2 - Underground joining method and underground joining apparatus for shield excavator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground connection for connecting both shield excavators in the ground when excavating a tunnel such as a road, a railroad, or a common groove from two directions facing each other. A method and an underground joining device.

[0002]

2. Description of the Related Art The conventional underground joining method and underground joining apparatus for a shield excavator are so-called MSD method and DK.
Methods such as the T construction method are known.

In the MSD method, a slidable penetrating ring mounted on the skin plate of the shield excavator on the penetrating side is pressed against a pressure receiving rubber ring equipped on the shield excavator on the receiving side to prevent the inflow of earth and sand or groundwater. It is a method of joining. In this MSD method, the pressure-receiving rubber ring comes into direct contact with the earth and sand during excavation, which may damage the pressure-receiving rubber ring and prevent sufficient water stopping. Further, since water is stopped only by contact between the penetrating ring and the pressure receiving rubber ring, there is a possibility that sufficient water cannot be stopped.

In the DKT method, after the entire chamber chamber of the receiving side shield excavator is pushed rearward by a dedicated jack, the penetrating side shield excavating machine is inserted into the receiving side and both skin plates are wrapped, This is a method of joining by stopping water with a tube seal equipped on the skin plate of the shield excavator on the penetration side. In this DKT method as well, the tube seal comes into direct contact with the earth and sand during excavation, so there is a risk that the tube seal will be damaged and water cannot be stopped sufficiently. Further, if soil is attached to the skin plate, the soil may be caught when the tube seal is inflated, and water may not be sufficiently stopped. Furthermore, when water is injected into the joint to stop water, the outer circumference of the joint in the radial direction is open, so the water leaks out and is wasted, resulting in poor efficiency of water injection. There is inconvenience.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is a shield excavator that prevents contact between a sealing device and earth and sand and protects the sealing device to improve water-stop performance. An object is to provide an underground joining method and an underground joining device.

[0006]

According to the underground joining method for a shield excavator of the present invention, a shield excavator on the receiving side capable of retracting the cutter inside the skin plate is prepared, and the cutter and the skin are provided. Prepare a penetration side shield excavator having a hood portion having a seal device radially inward of the plate and a protection ring for protecting the seal device, and after both shield excavators have reached the joining position, the receiving side The shield excavator's cutter inside the skin plate, and the penetration side shield excavator cutter inside the receiving side shield excavator's skin plate to move forward and the protection ring on the receiving side. Engage with the tip of the skin plate of the shield excavator and push the protective ring to the rear of the shield excavator on the penetration side to remove the skin plate of the shield excavator on the receiving side. Hood penetration side of the shield excavator is inserted bets inward to seal the skin plate of the receptacle and the receiving side sealing device.

Further, according to the underground joining apparatus of the shield excavator of the present invention, in the underground joining apparatus for joining the penetration side excavator to the receiving side shield excavator, the receiving side shield excavator is The cutter can be pulled inward of the skin plate, and the shield excavator on the penetration side has a hood portion radially inward of the skin plate, and a seal that seals this hood portion and the skin plate of the receiving side excavator. A device is provided, and a protection ring is provided on the outer side in the radial direction of the hood so as to be movable with respect to the skin plate.
A sand / sand seal is provided on the radially inner side of the tip of the protection ring to close the gap between the radially outer side of the hood portion.

Further, according to the underground joining apparatus of the shield excavator of the present invention, in the underground joining apparatus for joining the penetration side excavator to the receiving side shield excavator, the receiving side shield excavator is The cutter can be retracted inward of the skin plate, and a guard ring is provided axially movable inward in the radial direction of the skin plate of the shield excavator on the receiving side of the cutter plate, and the skin plate and the skin plate. A seal device and a sediment seal are provided between the protective ring and the shield excavator on the penetration side, which is provided with a protection ring and a hood portion radially inward of the skin plate. It is movable in the axial direction, and a earth and sand seal is provided radially inward of the protective ring between itself and the hood.

In carrying out the present invention, a scraper is provided at the tip of the hood portion so that when the hood portion is inserted radially inward of the receiving side skin plate, the soil and sand adhering to the inside of the skin plate is removed. Is desirable.
Further, according to the underground joining device of the shield excavator of the present invention, the protection ring is provided movably inward of the skin plate of the receiving side shield excavator in the radial direction.

As described above, by providing the movable protection ring inside the skin plate of the receiving side excavator, it is possible to prevent the adhesion of earth and sand inside the skin plate, and it is not necessary to provide a scraper.

As described above, according to the present invention, the joint portion of both the receiving side and the penetrating side shield machine can surely stop water by the protective ring and the sealing device between the protective ring and the hood. It can be carried out.

In carrying out the present invention, it is preferable to inject a cement-based injection material between the inner side of the protective ring in the radial direction and the outer side of the hood in the radial direction to stop the water. An injection pipe may be provided for this injection work.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing both the receiving side and the penetrating side shield excavators 1 and 11 before joining. In FIG.
A drive device 3 is provided on the main body 2 of the shield excavator 1 on the receiving side, a spindle disk 4 extending forward from the drive device 3 is provided with a cutter disk 5, and a cutter disk 5 is provided with a cutter 5a. There is. The cutter disk 5 is provided with spokes 6 that can expand and contract in the radial direction, and the spokes 6 are also provided with a cutter 6a. A skin plate 7 is provided on the outer circumference of the main body 2.

The main body 2 is provided with an advancing device for the shield excavator 1, a device for discharging the earth and sand excavated by the cutters 5a and 6a, an erector for assembling the inner wall of the tunnel, and the like. Is omitted.

A drive device 13 is also provided on the main body 12 of the shield excavator 11 on the penetration side, a cutter disk 15 is provided on a main shaft 14 extending forward from the drive device 13, and a cutter disk 15 is provided on the cutter disk 15. 15a is provided. The cutter disk 15 is provided with spokes 16 that can be expanded and contracted in the radial direction.
a is provided.

A skin plate 17 is provided on the outer periphery of the main body 12, and a tubular hood portion 18 is provided radially inward of the skin plate 17, and the hood portion 1 is provided.
A ring-shaped sealing device 19 is provided in the intermediate portion of 8.
This sealing device 19 includes a tube 19a and a sealing plate 19b.
Tube type that is composed of
9a is inflated and the seal plate 19b is engaged with the skin plate 7 of the receiving side shield excavator 1 for sealing.

Further, the skin plate 17 and the hood portion 18
A protective ring 22 that protects the sealing device 19 is provided between and. A scraper 20 is provided at the tip of the hood 18, and a sand / sand seal 24 is provided behind it.
Is fixedly provided on the side of the protection ring 22, and a seal member 21 is further provided at the rear end portion. The earth-and-sand seal 24 seals between the hood portion 18 and the protective ring 22, and the scraper 20 at the tip of the earth-and-seal seal 24 is used when the hood portion 18 penetrates into the receiving-side skin plate 7. 7 Scrape off the soil that adheres to the inner surface. In this way, the sealing device 19 includes the protective ring 22.
It is also protected by the earth and sand seal 24 and is not exposed to earth and sand. Further, the protection ring 22 can be retracted toward the main body 12 side, is held by the locking device 23, and the excavation is performed in a state where it cannot be retracted. Then, in the excavator 11 on the penetration side, an injection pipe P for injecting the cement-based injection material into the space S radially outward of the hood portion 18 and radially inward of the protection ring 22.
Is provided.

The body 12 of the shield excavator 11 on the penetration side is also provided with a forward device for the shield excavator 11, a pressurizing device for pressurizing the front of the skin plate 17, cutters 15a, 1a.
Although a device for discharging the earth and sand excavated at 6a, an erector for assembling the inner wall of the tunnel, and the like are provided, their illustration and description are omitted.

In order to excavate the tunnel T using the shield excavators 1 and 11 having the above-described structure, the shield excavator 1 on the receiving side from one side and the shield excavator 11 on the penetrating side from the other to the joining position M. Excavate. The protection ring 22
Is held by the locking device 23 and is not retracted to the main body 12 side, so that the protection of the sealing device 19 by the protection ring 22 during excavation can be ensured. Further, since the sealing device 19 is surrounded and protected by the protection ring 22 and the earth and sand seal 24, it is not exposed to earth and sand and is not damaged during excavation.

As shown in FIG. 2, when the tunnel T is excavated to the joining position M, the spout of the shield excavator 1 on the receiving side is excavated.
The blade 6 is contracted and retracted to the inside of the skin plate 7, and the cutter disk 5 is retracted to the main body 2 side. Then, the spoke 16 of the penetration side shield excavator 11 is contracted to be positioned inside the skin plate 7 of the reception side shield excavator 1, and the holding of the protection ring 22 by the locking device 23 is released.
The excavation by the shield excavator 11 on the penetration side is continued.

In this way, the protective ring 22 of the shield excavator 11 on the penetration side engages with the skin plate 7 of the shield excavator 1 on the reception side, and further the shield excavator 11 on the penetration side.
When is moved forward, the protection ring 22 retracts to the main body 12 side,
The hood portion 18 enters the inside of the skin plate 7 of the receiving side shield excavator 1. When the hood portion 18 enters the skin plate 7, the scraper 20 scrapes off the earth and sand attached to the inner surface of the skin plate 7, so that the earth and sand do not flow into the sealing device 19 side.

In the above-described embodiment, the protection ring 22 is pushed back by the skin plate 7 so as to retract toward the main body 12 side. However, the protection ring 22 is provided with a drive device such as a hydraulic jack, and the penetration side is provided. The hydraulic jack may be driven in accordance with the forward movement of the shield excavator 11 and the protection ring 22 may be pulled toward the main body 12 side.

When the hood portion 18 enters the skin plate 7, the tube 19a of the sealing device 19 is inflated with gas or liquid, and the seal plate 19b is engaged with the skin plate 7 of the receiving side excavator for sealing. (Figure 3). It should be noted that since the earth and sand adhering to the skin plate 7 is scraped off by the scraper 20, the seal plate 19b tightly engages with the skin plate 7 and a high waterproofness is obtained.

If necessary, the water blocking material is injected from the injection pipe P into the space S radially inside the protection ring 22 and radially outside the hood portion 18. In this case, the water blocking material has no leakage, so that the injection efficiency is high.

When the joint is stopped in this way, the shield excavators 1 and 11 are disassembled and carried out to complete the tunnel T.

4 and 5 show another embodiment of the joining device of the present invention. Receiving side shield excavator 1
A protection ring 25 is provided radially inward of the skin plate 7A so as to be axially movable with respect to the skin plate 7A. The seal member 21 is provided between the skin plate 7A and the protection ring 25.
On the A side, the earth and sand seal 24A at the rear end is the protection ring 25.
It is fixed to the side and provided respectively. A seal member 21A is provided between the protection ring 25 and the main body 2.

Hood part 18 of the shield side excavator 11 on the penetration side
A differs from the embodiment of FIG. 1 in that the sealing device 19 is not provided, and the sealing member 19 is
It is provided on the inner peripheral surface of the receiving-side skin plate 7A, faces the protection ring 25 before joining in FIG. 3, and engages with the outer peripheral surface of the hood portion 18A on the penetrating side to perform a sealing action during penetration. Is configured. In the scraper used in the embodiment of FIG. 1, the inner peripheral surface of the receiving side skin plate 7A is the protection ring 2 in this embodiment.
Not used because it is protected by 5.

At the time of penetration, as shown in FIG.
The protection ring 25 inside the receiving-side skin plate 7A is pulled toward the main body 2 side, and the penetration-side cutter 15 and the hood portion 1 are provided.
8A is inserted and the sealing device 19 provided on the inner peripheral surface of the skin plate 7A engages with the hood portion 18A and performs a sealing action. If necessary, a water blocking material may be added from the injection pipe P to the inside of the skin plate 7A in the radial direction and the hood portion 1.
It is injected into the space S radially outward of 8A.

Further, FIGS. 6 and 7 show still another embodiment of the joining apparatus of the present invention. In this embodiment, similarly to the embodiments of FIGS. 4 and 5, the protective ring 25 is provided radially inward of the skin plate 7A of the receiving side shield excavator 1, and the mounting position of the sealing device 19 is fixed. It's different.

That is, the sealing device 19 is provided on the outer peripheral surface of the hood portion 18 on the penetration side as in the embodiment of FIG. 1, and before joining, as shown in FIG. 6, the protection ring 22 on the penetration side. 7, and when it penetrates, it seals between the hood portion 18 and the receiving side skin plate 7. The injection of the water blocking material into the space S between the inside of the skin plate 7 in the radial direction and the outside of the hood portion 18 in the radial direction is the same as in the previous embodiment.

[0032]

The effects of the underground joining method and joining apparatus for the shield excavator of the present invention are listed below. (1) Since the sealing device is surrounded and protected by the protection ring and the earth and sand seal, it is not exposed to earth and sand and is not damaged during excavation. (2) Since the protection ring is not locked by the locking device and retracted to the main body side, the protection of the sealing device by the protection ring during excavation can be ensured. (3) If the scraper is provided in the hood portion, when the scraper enters the skin plate, the scraper can scrape off the dirt and soil adhering to the inner surface of the skin plate and prevent the sand and sand from flowing into the sealing device side. (4) Since the earth and sand adhering to the skin plate are protected by the protection ring or scraped off by the scraper, the sealing device tightly engages with the skin plate, and high water blocking performance is obtained. (5) When injecting the waterproofing material, the space into which the waterproofing material is injected is surrounded by each part, so that the waterproofing material does not leak unnecessarily and high injection efficiency of the waterproofing material is obtained. To be (6) Since the protective ring and the sealing device double-seal, the water-stopping work is surely performed.

[Brief description of drawings]

FIG. 1 is a sectional view of a state in which a tunnel is being excavated by the shield excavator of the present invention.

FIG. 2 is a cross-sectional view immediately before joining the shield excavator shown in FIG.

3 is a cross-sectional view of the shield excavator of FIG. 2 joined together.

FIG. 4 is a cross-sectional view immediately before joining the shield excavator of another embodiment.

5 is a cross-sectional view of the shield excavator of FIG. 4 joined together.

FIG. 6 is a cross-sectional view immediately before joining the shield excavator of another embodiment.

7 is a cross-sectional view of the shield excavator of FIG. 6 joined together.

[Explanation of symbols]

1,11 ... Shield excavator 2, 12 ... Main body 3, 13 ... Drive device 4, 14 ... Spindle 5,15 ... Cutter disk 5a, 15a ... Cutter 6, 16 ... Spokes 6a, 16a ... Cutter 7, 17 ... Skin plate 18 ... Hood part 19: Sealing device 20 ... scraper 21 ... Sealing member 22 ... Protection ring 23 ... Locking device 24 ... Sediment seal 25 ... Protective ring T ... tunnel M: Joining position S ... space

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Uchida 1-2-7 Moto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Takehiko Kumabe 1-chome, Moto Akasaka, Minato-ku, Tokyo 2-7 Kashima Construction Co., Ltd. (72) Inventor Yukio Ichihara 1-2-7 Moto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Mitsuo Shimizu Harima-machi, Kako-gun, Hyogo Prefecture 8 Niijima Kawasaki Heavy Industries Co., Ltd. Harima Factory (72) Inventor Masahiko Taketomi 8 Niijima, Harima-machi, Kako-gun, Hyogo Prefecture 72 Kawasaki Heavy Industries Co. Ltd. Harima Factory (72) Inventor Tatsuo Nomura Minato-ku, Tokyo 2-4-1 Hamamatsucho Kawasaki Heavy Industries, Ltd. Tokyo Head Office (56) References JP-A-5-156887 (JP, A) JP-A-8-158783 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) E21 D 9/06

Claims (4)

(57) [Claims] 1. A shield excavator on a receiving side capable of retracting a cutter inside a skin plate is prepared, and a hood portion having a seal device radially inside the cutter and the skin plate and the seal device are protected. After preparing a shield excavator on the penetration side having a protection ring to, and after both shield excavators reach the joining position, the cutter of the shield excavator on the reception side is pulled inward of the skin plate, and Position the cutter of the shield excavator inside the skin plate of the receiving shield excavator and move it forward to engage the protective ring with the tip of the skin plate of the receiving shield excavator to bring the protective ring into the penetration shield. Push it into the rear of the excavator, insert the hood part of the shield excavator on the penetration side inside the skin plate of the shield excavator on the receiving side, and A ground excavating method for a shield excavator, characterized in that a seal portion is used to seal the cover portion and the receiving side skin plate. 2. An underground joining device for joining a penetration excavator to a receiving side shield excavator, wherein the receiving side shield excavator is capable of retracting the cutter into the skin plate, Side shield excavator is equipped with a hood part inside the skin plate in the radial direction, and a sealing device is provided to seal this hood part and the skin plate of the receiving side excavator, and the outside of the hood part in the radial direction is protected. A ring is movably provided with respect to the skin plate,
An underground joining device for a shield excavator, characterized in that a earth-and-sand seal that closes a gap between the protective ring tip and the outer side in the radial direction of the hood is provided. 3. An underground joining apparatus for joining a penetration excavator to a receiving shield excavator, wherein the receiving shield excavator is capable of retracting the cutter into the skin plate, and A protective ring is axially movably provided inward of the skin plate of the shield excavator on the receiving side thereof, and a sealing device and a sand / sand seal are provided between the skin plate and the protective ring. The shield excavator on the penetration side is provided with a protection ring and a hood portion inward of the skin plate in the radial direction, and the protection ring of the shield excavator on the penetration side is movable in the axial direction, and is located radially inward of the protection ring. Is a ground excavator for a shield excavator, which is provided with a soil seal between the hood and the seal. 4. The shield excavation according to claim 2, wherein a protective ring is provided radially inward of the skin plate of the receiving side shield excavator, and a earth and sand seal is provided between the skin plate and the protective ring. Underground joining device.