JPH0996188A - Tunnel joining engineering method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a water cut-off means from coming into contact with the cut surface of an existing segment in the rotating condition to be damaged and make a designated limited installation range suffice in the case of advancing a ring to cut and intrude into an existing segment to be joined to the segment, thereby joining a new tunnel and an existin tunnel to each other and installing a water cut-off means comprising a water cut-off bag or the like in the outer periphery of the ring. SOLUTION: A ring joined to an existing segment comprises a cutting ring 4 which is positioned inside a skin plate 2 and turned to cut and intrude into a segment 13 of an existing tunnel and a water cut-off ring 3 which is positioned outside the cut ring 4, not rotated and provided with a water cut-off container 10 as a water cut-off means on the outer periphery thereof, which is adapted to cut off water in a gap between the intruded cut ring 4 and the cut-opened existing segment 13. While being rotated, the cut ring 4 is advanced to cut and intrude into the segment 13 of the existing tunnel and joined thereto, the water cut-off ring 3 is advanced in synchronization with the cut ring 4 without rotation to make the water cut-off container 10 closely adhere to the cut opening surface of the segment 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for joining an existing shield tunnel and a new shield tunnel.

[0002]

2. Description of the Related Art As a device for joining a new shield tunnel to an existing shield tunnel, for example, as shown in FIG. 9, a shield excavator 1 for excavating a new tunnel has a cutting means composed of a cutting ring 16 and a cutter head for reducing the diameter. 6
The cutting ring 16 is connected inside the cutting ring 16 in a reduced diameter state, and the cutting head 6 is moved forward while being rotated by a driving and rotating means such as a motor 17, whereby the cutting ring is formed. There is a construction method in which the new tunnel is directly joined to the existing tunnel by moving forward while rotating 16 also to cut and open the side surface of the existing tunnel and biting the tip into the existing segment 13.

In this joining method, the cutting ring 16
When cutting and penetrating the existing tunnel segment 13 by
Deformation and flattening of segment 13 by cutting cutting ring
Since the cutting is performed with a margin larger than the outer diameter of the ring so that the 16 and the segment 13 are not separated, a gap is created between the cutting ring 16 and the segment 13 at the time of penetration. Therefore, in order to stop water in this gap, a water blocking means such as a water blocking bag is provided on the outer peripheral portion of the ring, etc., and the water blocking bag is filled with a filler in a state in which the single ring and the existing segment are joined. To inflate the bag, thereby filling the void.

[0004]

Since the cutting opening surface of the existing segment is formed on the side surface of the segment, it is formed into a curved surface. Depending on the stopping position of the cutting ring, the cutting opening surface of the cutting ring is joined to the cutting opening surface. The parts are different. Therefore, in order to cope with the case where the cutting ring is stopped at any position, a water blocking bag is interposed between the cutting opening surface of the segment and the cutting opening surface of the segment no matter where it is stopped.
It is necessary to equip a wide range of the outer circumference of the ring with a waterproof bag, which is a large-scale operation.

Further, since the water blocking bag is mounted on the outer circumference of the rotating ring, there is a high possibility that the water blocking bag will be damaged due to contact with the existing segment surface that has been cut, and the outer peripheral portion is protected when the ring is stored. It is necessary and, moreover, the protective material must be a material that does not hinder the expansion due to the filling of the waterproof bag.

The cutting ring can be stopped in a preset direction / position with respect to the cutting opening surface of the existing segment by controlling the rotation of the cutter head for rotating the cutting ring. In this case, it is sufficient to attach a water blocking bag at a predetermined position on the outer circumference of the cutting ring in correspondence with the cutting opening surface of the existing segment. Is attached to the outer circumference of the rotating ring, there is a risk of damage due to contact with the cutting surface of the existing segment due to rotation.

The object of the present invention is to eliminate the disadvantages of the prior art, to advance the ring, cut into the existing segment and join the segment to join the new tunnel and the existing tunnel, and to connect the new tunnel and the existing tunnel to the outer circumference of the ring. Provided is a tunnel joining method and device in which, when the water stopping means is attached by, for example, the cutting surface of the existing segment is prevented from coming into contact and being damaged in a rotating state, and the attaching range is limited to a predetermined range. Especially.

[0008]

In order to achieve the above-mentioned object, the present invention firstly comprises a ring having an excavating means provided in a shield excavator for excavating a new tunnel, and this ring forms a segment of an existing tunnel. In the joining method for cutting and joining a new tunnel to an existing tunnel, the ring is located inside the skin plate and rotated to cut and penetrate the segment of the existing tunnel, and the ring is located outside the cutting ring. , A non-rotating, water-sealing ring having a water-sealing means provided on the outer periphery for water-sealing the gap between the penetrating cutting ring and the existing segment with the cutting opening,
The cutting ring is propelled while rotating to cut and penetrate the segment of the existing tunnel, and the water stop ring is advanced in synchronization with the cutting ring without rotating, and the water stop means is brought into close contact with the cutting opening surface of the segment. This is the summary.

Secondly, in the shield excavator, a cutting ring located inside the skin plate and rotating to cut into a segment of an existing tunnel, and a cutting ring located outside the cutting ring that does not rotate and penetrates. The gist of the present invention is to provide a ring constituted by a water-stop ring having an outer periphery with water-stop means for stopping the water in the gap between the ring and the existing segment opened by cutting.

Thirdly, the water stopping means is provided with a groove corresponding to the shape of the cutting opening of the existing segment on the outer peripheral portion of the water stopping ring, and the stretchable water stopping container that expands by the injection of the filling material is provided in the groove. The main idea is to store it in the article.

According to the first and second aspects of the present invention, the ring penetrating into the segment of the existing tunnel is composed of the cutting ring and the water stop ring, and only the cutting ring is rotated to propel the existing segment. Since the water-stop ring is prevented from rotating by cutting and penetrating into it, it is possible to prevent the water-stop means attached to the outer periphery from coming into contact with the cutting opening surface of the segment and damaging it. By advancing in synchronism with the cutting ring, the water blocking means is brought into close contact with the cutting opening surface in a state where the cutting ring has penetrated into the existing segment to achieve water blocking.

Further, since the cutting ring is located inside the water stop ring, the load on the rotary drive mechanism for rotating the cutting ring can be reduced.

According to the third aspect of the present invention, in addition to the above action, the water blocking means is provided with a groove corresponding to the shape of the cutting opening of the existing segment on the outer peripheral portion of the water blocking ring, and By storing an expandable water-tight container that expands by pouring in the groove and filling the container with the filling material, the container is brought into close contact with the cutting opening surface of the existing segment by the injection pressure, and water can be reliably stopped.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical cross-sectional side view showing a first step of a joining method using a tunnel joining apparatus of the present invention. The joining apparatus of the present invention is installed in a shield excavator 1 and is placed inside a skin plate 2. Water stop ring 3
Is attached slidably, the cutting ring 4 is slidably combined further inside the water stop ring 3, and the water stop ring 3 and the cutting ring 4 constitute a ring.

As shown in FIG. 8, the cutting ring 4 is provided with a cutting means such as a cutting bit 5 at its tip, and a concave portion 7 for fitting with the cutter head 6 is provided at a predetermined position on the inner peripheral surface thereof. The tip portion including the cutting bit 5 projects forward from the tip of the water stop ring 3, and the outer side of the rear portion from the tip portion is reduced in diameter, and the water stop ring 3 is combined in parallel with the reduced diameter portion. . Then, the earth and sand sealing material 12 is interposed in the gap between the water stop ring 3 and the cutting ring 4.

The water stop ring 3 is supported by a holding portion 8 provided inside the skin plate 2 and is connected to an extruding mechanism such as a jack so as not to rotate and to be propelled in synchronization with the extruding speed of the cutting ring 4. On the outer peripheral surface of the tip, water stop means was provided at a position corresponding to the shape of the cutting opening surface of the segment of the existing tunnel.

The water-stop means comprises a groove 9 formed on the outer peripheral surface of the water-stop ring 3 and an expandable water-stop container 10 housed inside the groove 9. It is formed so as to expand by the injection pressure of the filler, and is formed into a flexible bag shape using a material such as rubber.

Filler injection pipe that opens into the water-stop container 10
11 is provided in the length direction of the water blocking ring 3, the filling machine is connected to the other end of the injection pipe 11, and the back filling of the outer peripheral portion of the water blocking ring 3 or the water blocking container 10 exerts the water blocking function. Until then, several injection pipes will be provided to perform supplemental injection around the opening.

Although not shown, a soil and sand seal for preventing soil and sand from entering the shield excavator 1 between the skin plate 2 and the water stop ring 3 and between the water stop ring 3 and the partition wall. The material was provided on the holding portion 8.

It should be noted that the cutter head 6 has a mechanism for controlling the diameter when it is coupled with the cutting ring 4 so as to reduce the diameter as compared with the excavation of the shield machine. A mechanism for moving 6 back and forth was provided.

Next, a method of joining a tunnel using such a joining device will be described. As shown in Fig. 1, the shield excavator 1 for excavating a new tunnel is excavated toward the segment 13 of the existing tunnel, and the injection pipe is injected into the ground 15 around the junction.
Injecting chemicals from 14 to improve the ground for the purpose of water stop (first step), and stop the shield excavator 1 immediately before the segment 13 of the existing tunnel (second step, see FIG. 2) In this state, The cutter head 6 is expanded in diameter and is located in front of the cutting ring 4 and the water stop ring 3.

As a third step, as shown in FIG. 3, the diameter of the cutter head 6 is reduced and the cutter head 6 is retracted to cut the cutting ring 4.
And is fitted to the cutting ring 4 via the recess 7. Then, supplemental injection is performed from the injection pipe around the skin plate 2 in the ground 15 where the ground has been improved.

Next, as a fourth step, as shown in FIG. 4, the rotational driving mechanism of the cutter head 6 is operated to push the cutting ring 4 forward while rotating the cutting ring 4 by this rotational driving force.

When the cutting ring 4 is excavated by a predetermined length until the cutter head 6 contacts the segment 13, the fitting between the cutting head 6 and the cutting ring 4 is released,
The cutter head 6 is retracted, the cutting ring 4 is re-engaged at this retracted position, and then the rotary drive mechanism of the cutter head 6 is operated to push out the cutting ring 4 while rotating it, and the cutting bit 5 at the tip end is installed. The central portion of the tunnel segment 13 is cut and penetrated (fifth step, see FIG. 5).

After the cutting ring 4 has been dug by a predetermined length, as shown in FIG. 6 as a sixth step, the fitting between the cutter head 6 and the cutting ring 4 is released, and the cutter head 6 is removed.
Is retracted again, fitted with the cutting ring 4 and advanced by a predetermined length to further cut the segment 13 with the cutting bit 5 to widen the opening.

In this way, the retracting of the cutter head 6,
The fitting with the cutting ring 4 and the rotary extrusion are repeated, the cutting ring 4 is advanced to open the segment 13 with the cutting bit 5, and the predetermined position including the secondary lining portion of the segment 13 as shown in FIG. Once it has been cut, stop the penetration.

When the cutting ring 4 advances as described above, the water stop ring 3 is located outside the cutting ring 4 and does not rotate, and a jack or the like is rotated at a speed synchronized with the pushing speed of the cutting ring 4. It pushes at the same time by the pushing mechanism. Further, since the cutting ring 4 is located inside the water stop ring 3, it is possible to reduce the load applied to the rotary drive mechanism when the cutting ring 4 advances.

When the propulsion is completed, the water shutoff container 10 provided on the water shutoff ring 3 is located at a position corresponding to the cutting opening surface of the segment 13, and in this state, the water shutoff container is removed from the injection pipe 11.
If you inject a filling material such as mortar or water into 10 to expand the water-stop container 10, the water-stop container 10 will adhere to the cutting opening surface due to the injection pressure to stop water, and groundwater or earth and sand from the outside Prevent the inflow of.

[0029]

As described above, according to the tunnel joining method and apparatus of the present invention, the ring for cutting and penetrating the segment of the existing tunnel is composed of the cutting ring and the water stop ring, and the cutting ring is moved forward while being rotated. Since the water blocking ring is joined to the existing segment and the water blocking ring is prevented from rotating, it is possible to prevent the water blocking means mounted on the outer periphery of the water blocking ring from coming into contact with the cutting surface of the segment and being damaged.

Further, since the cutting ring is located inside the water stop ring, the load on the rotary drive mechanism for rotating the cutting ring can be reduced.

Further, the water stop means is provided with a groove line corresponding to the shape of the cutting opening of the existing segment on the outer peripheral portion of the water stop ring, and an expandable water stop container that expands by the injection of the filling material is provided in the groove line. By filling the inside of the container with the filling material and filling the container with the filling material, the container comes into close contact with the cutting opening surface of the existing segment by the injection pressure, and water can be surely stopped.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a first step of a tunnel junction method of the present invention.

FIG. 2 is a vertical sectional side view showing a second step of the tunnel joining method of the present invention.

FIG. 3 is a vertical sectional side view showing a third step of the tunnel junction method of the present invention.

FIG. 4 is a vertical sectional side view showing a fourth step of the tunnel junction method of the present invention.

FIG. 5 is a vertical sectional side view showing a fifth step of the tunnel junction method of the present invention.

FIG. 6 is a vertical sectional side view showing a sixth step of the tunnel junction method of the present invention.

FIG. 7 is a vertical sectional side view showing a seventh step of the tunnel junction method of the present invention.

FIG. 8 is a vertical cross-sectional side view of essential parts in a state of a seventh step of the tunnel joining method of the present invention.

FIG. 9 is a vertical sectional side view showing a conventional tunnel joining method.

[Explanation of symbols]

 1 ... Shield excavator 2 ... Skin plate 3 ... Water stop ring 4 ... Cutting ring 5 ... Cutting bit 6 ... Cutter head 7 ... Recessed portion 8 ... Retaining portion 9 ... Groove 10 ... Water stop container 11 ... Injection pipe 12 ... Sediment seal Material 13… Segment 14… Injection tube 15… Ground 16… Cutting ring 17… Motor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000002299 Shimizu Construction Co., Ltd. 1-3-2 Shibaura, Minato-ku, Tokyo (71) Applicant 000140982 Mazumagumi Co., Ltd. 2-5-8 Kita-Aoyama, Minato-ku, Tokyo (71) ) Applicant 000230010 Geostar Co., Ltd. 4 2-3 Shiba, Minato-ku, Tokyo (72) Inventor Kazuo Takahashi 2-6-2 Otemachi 2-chome, Chiyoda-ku, Tokyo Tokyo Sewer Service Co., Ltd. (72) Inventor Yabe Toshiyuki 2-6-2 Otemachi, Chiyoda-ku, Tokyo Within Tokyo Sewer Service Co., Ltd. (72) Inventor Shigeto Aoki 2-6-2 Otemachi, Chiyoda-ku, Tokyo Within Tokyo Sewer Service Co., Ltd. (72) Inventor Toru Watanabe 2570-2 Shimotsuruma, Yamato-shi, Kanagawa Nishimatsu Construction Co., Ltd. Technical Research Institute (72) Inventor, Yoshio Iso Kanagawa 2570 4 Shita-Tsuruma, Nishimatsu Construction Co., Ltd. Technical Research Institute (72) Inventor Yoshikazu Kido 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo Kumagai Gumi Co., Ltd. Tokyo headquarters (72) Inventor Noriyasu Yamamori Shinjuku-ku, Tokyo 2-1-1 Tsukudo-cho Kumagaya Gumi Tokyo Head Office (72) Inventor Minoru 1-3 2-3 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Shinji Seki 1-chome, Shibaura, Minato-ku, Tokyo No. 2-3 Shimizu Corporation (72) Inventor Masahiko Hayakawa 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Intra-company group (72) Inventor Tsutomu Hagiwara 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Stock company Inter-company (72) Inventor Yutaka Fujino 4-23 Shiba, Minato-ku, Tokyo Geostar Co., Ltd. (72) Hideki Tanaka 2-3-4 Shiba, Minato-ku, Tokyo Geostar, Inc.

Claims (3)

[Claims] A shield excavator for excavating a new tunnel is provided with a ring having excavation means, and in this joining method for cutting and penetrating into a segment of an existing tunnel to join the new tunnel to the existing tunnel, the ring is
A cutting ring that is located inside the skin plate and rotates to cut into the existing tunnel segment, and a gap that is located outside the cutting ring and that does not rotate and that does not rotate and that penetrates the cutting ring and the existing segment that has a cutting opening. It consists of a water stop ring equipped with a water stop ring on the outer periphery to prevent the water from stopping, and it is propelled while rotating the cutting ring to cut and penetrate into the segment of the existing tunnel and join it without rotating the water stop ring. A tunnel joining method characterized by advancing in synchronization with the cutting ring and adhering the water stop means to the cutting opening surface of the segment. 2. A shield excavator comprising a cutting ring located inside a skin plate and rotating to cut into a segment of an existing tunnel, and a cutting ring located outside the cutting ring that does not rotate and penetrates. A tunnel joining device, characterized in that a ring constituted by a water-stop ring having an outer periphery with water-stop means for stopping water in a gap between an existing segment that has been cut and opened is provided. 3. The water stop means is provided with a groove line corresponding to the shape of the cutting opening of the existing segment on the outer peripheral portion of the water stop ring, and an expandable water stop container that expands when the filler is injected is provided in the groove line. The tunnel joining device according to claim 2, which is housed in a box.