JPH064997B2 - Penetration Ring Penetration Method for Underground Bonded Shield Machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for penetrating a penetrating ring of an underground joint type shield machine, in which a tunnel to be constructed is dug from both sides of the tunnel and joined on the way to complete the tunnel.

[Conventional technology]

The applicant of the present invention has a shield tunnel underground bonding method (Japanese Patent Application No. 61-101810), which is suitable for the case where the shield machine is used for underground bonding in advance.
Provided.

In the figure, reference sign G is a rock mass near the junction of the shield tunnel, and in this rock mass G, the first shield machine 1
Excavates the first tunnel Ta by the cutter device 10,
Further, the second shield machine 2 excavates the tunnel Tb by the cutter device 20. The wall surface of the tunnel Ta is primarily covered with the segments 3a, 3a ... And the wall surface of the tunnel Tb is the segments 3b, 3b.
Primary lining is being carried out by.

The first shield machine is provided with a cylindrical skin plate 1a, the tip portion 1b of which is an outer cylinder 11
The inner ring 12 and the inner cylinder 12 are doubled, and a penetrating ring 13 is housed therebetween. A partition plate 14 is provided inside the inner cylinder 12, and a pressure support plate 1 is provided between the inner cylinder 12 and the outer cylinder 1a.
5 are provided, and the push jacks 17,
A plurality of 17, ... are attached to the push jack 17
The working end 17 a of the abuts on the rear surface of the penetrating ring 13. A plurality of propulsion jacks 18, 18, ... Are attached to the rear surface of the pressure support plate 15 in the circumferential direction, and the working end 18a of the propulsion jack is in contact with the side surface of the segment 3a. The cutter device 10 is formed to have a diameter slightly smaller than that of the inner cylinder 12, the shaft body 19 thereof is axially supported by the partition plate 14, and the end edge portion of the cutter device 10 is expandable and contractible in the radial direction of the shield machine 1. The cutter unit 10a is provided.

The second shield machine 2 is provided with a cylindrical skin plate 2a having the same diameter as that of the first skin plate 1a, and the tip portion 2b thereof is the same as that of the first shield machine 1 as described above. By being double-formed by the cylinder 21 and the inner cylinder 22, a penetration chamber R into which the penetration ring 13 penetrates is formed. A partition plate 24 is fixed inside the inner cylinder 22, a ring-shaped pressure support plate 25 is fixed between the inner cylinder 22 and the skin plate 2a, and a ring 23 is fixed to the outer cylinder 21. And, on the rear surface of the ring 23, the propulsion jacks 28, 28,
A plurality of ... Are attached, and their working ends 28a are in contact with the side surfaces of the segments 3b. Further, the cutter device 20
Is a cutter unit 2 configured similarly to the cutter device 10.
0a and the shaft 29 are provided. The first and second shield machines 1 and 2 are provided with mud press-fitting pipes 16 and 26 respectively at their tips.

Next, the underground joining method will be described with reference to FIGS. 4 to 7. First, as shown in FIG. 4, the ground G is excavated by using the first shield machine 1 and segmented on the wall surface. The lining of 3a, 3a, ... Is performed, and one tunnel Ta is built by taking reaction force to this, and the other tunnel Tb is also built by the second shield machine 2. Then, as shown in FIG. 5, the second shield machine 2 of the first shield machine 1 was opposed to the second shield machine 2 of the first shield machine 1 leaving a natural ground Gi (about 30 cm to 1 m) of a predetermined length. After that, the cutter unit 10 at the tip of the cutter device 10, 20
a and 20a are shortened. Next, as shown in FIG.
By driving the pushing jack 17 of the first shield machine 1,
The tip of the penetration ring 13 is the outer cylinder 2 of the second shield machine 2.
1 and the inner cylinder 22 are slid until they are inserted into the penetration chamber R, so that the tunnel connection left between the first shield machine 1 and the second shield machine 2 by the penetration ring 13 Part of the ground Gi is covered. Then, as shown in FIG. 7, the cutter devices 10 and 20 are disassembled and removed, the partition plates 14 and 24 are cut and removed, and the penetration ring 1 is further removed.
After welding both ends of 3 to the inner cylinders 12 and 22, the wall surface of the joint is covered by placing concrete 31 including the thickness of the secondary lining on the inner wall surface of the skin plate. , Complete the junction of the tunnel.

Therefore, in the underground joining method of the shield tunnel, by inserting the penetration ring 13 into the penetration chamber R, the ground Gi of the joint can be covered, and soil retention and water stoppage of the joint can be ensured. The construction period and the construction cost can be reduced without using an auxiliary construction method such as the freezing construction method.

[Problems to be solved by the invention]

However, in the underground joining method, the shield machine 2
Since the penetration chamber R is formed at the tip portion 2b of the skin plate 2a, during the normal excavation before joining, the penetration chamber R is clogged with dirt, gravel, etc.
The penetration ring 13 of the shield machine 1 of the second shield machine 2
There is a problem that the penetration ring 13 cannot be smoothly penetrated into the penetration chamber R when it is inserted into the penetration chamber R to cover the ground Gi left between the first and second shield machines. Has occurred.

The present invention has been made in view of the above problems, and cleans dirt, gravel, and the like clogged in the penetration chamber to secure a space for the penetration chamber, and the penetration ring can be smoothly inserted into the penetration chamber. It is an object of the present invention to provide a method for penetrating a penetrating ring of an underground joint type shield machine.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention, when penetrating and joining the penetration ring of the first shield machine to the penetration room of the second shield machine, while digging into the ground, penetrates the penetration room. It is characterized by penetrating the penetrating ring by blowing off the sand and gravel, etc., which have been clogged in with a high pressure jet.

At that time, insert the penetration ring while ejecting a high-pressure jet from the tip of the penetration ring, or inject the high-pressure jet from the back of the penetration chamber to secure the space of the penetration chamber, and then insert the penetration ring. Is desirable.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of a method for penetrating a penetration ring of an underground joint type shield machine according to the present invention, and FIG. 3 shows a second embodiment. In these figures, the same components as those shown in the prior art of FIGS. 4 to 7 are designated by the same reference numerals and the description thereof will be omitted.

In FIGS. 1 and 2, reference numeral 1 is a part of a first shield machine for excavating a tunnel from one side (a cross section near the penetration ring), and 2 is a part of a second shield machine for excavating a tunnel from the other side. (Cross section near the penetration chamber). First
The front end portion 1b of the skin plate 1a of the shield machine 1 is double formed by the cylindrical outer cylinder 11 and the inner cylinder 12, and an iron plate is cylindrical between the outer cylinder 11 and the inner cylinder 12. The penetrating ring 13 formed in is stored. High pressure jet nozzles (not shown) are arranged at predetermined intervals in the circumferential direction of the tip portion (left side with respect to the paper surface) 13a of the penetration ring 13, and the shield machine 1 is exposed from the high pressure jet nozzles. A high-pressure jet of water, air, or the like supplied from the inside by a predetermined method is jetted, and a chemical for stopping water is configured to be jetted. Then, the outer cylinder 11, the inner cylinder 12, and the penetration ring 13
Sealing materials 35, 35, such as a lip seal, an O-seal, and an O-ring, are attached between and. Further, a plurality of rods 17a, 17a, ... Are provided at the rear end of the penetrating ring 13 (on the right side with respect to the paper surface) at predetermined circumferential intervals.
Are attached, and the rods 17a, 17a, ... Are provided so as to penetrate the partition plate 14 fixed to the outer cylinder 11 and the inner cylinder 12, and the other ends thereof are arranged at predetermined intervals in the circumferential direction of the skin plate 1a. It is connected to a plurality of push-out jacks 17, 17, ...

In the shield machine 2, the front end portion 2b of the skin plate 2a is double formed in the cylindrical outer cylinder 21 and inner cylinder 22 having the same diameter as that of the first shield machine 1, so that the penetration ring 13 is formed. A penetration chamber (cylindrical space) R to be penetrated is configured. Other configurations of the first and second shield machines 1 and 2 are the same as those shown in the above-mentioned conventional technique.

Next, a method of penetrating the penetrating ring of the underground joint type shield machine of the present invention will be described.

First, the tunnel to be constructed is excavated from both sides by the shield machines 1 and 2 in the same manner as the underground joining method shown in the conventional technique, and a predetermined ground Gi (about 30 cm to 1 m
Leave them to face each other.

After shortening the tip portions 10a, 20a of the cutter devices 10, 20 of the shield machines 1, 2, as shown in FIG. 2, the pushing jack 17 is driven to gradually push the penetrating ring 13 to push its tip. A high-pressure jet is jetted from the portion 13a. By doing so, as the penetrating ring is inserted into the penetrating chamber R, the penetrating chamber R during the excavation
The sand, gravel, and the like clogged inside are blown away by a high-pressure jet and cleaned, and a cylindrical space of the penetration chamber R is secured. After the penetration ring 13 has penetrated into the penetration chamber R, water is stopped by injecting a chemical solution into the penetration chamber R from the tip portion 13a of the penetration ring 13.

Therefore, according to the method of the present invention, the penetration chamber R
Even if the inside of the penetration chamber R is blocked due to clogging with dirt, gravel, etc., the high pressure jack can be used to easily and reliably remove them to secure the space of the penetration chamber R, so that the penetration ring 13 can be smoothly inserted into the penetration chamber R. Can be plugged in.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the high-pressure jet nozzle 36 is provided in the partition plate 24 at the back of the penetration chamber R of the second shield machine 2 in the tubular space of the penetration chamber R, not in the penetration ring 13 shown in the above-mentioned embodiments. A plurality of them are fixed along the circumferential direction at fixed intervals, and other configurations are similar to those of the first embodiment.

Then, in the method of this embodiment, before the penetration ring 13 is inserted into the penetration chamber R, the high pressure jet blows out the earth and sand and the gravel and the like clogged in the penetration chamber R from the depth of the penetration chamber R to the outside. After cleaning the inside and securing the space, the penetration room R
It should be inserted inside. In addition, after the penetration of the penetration ring 13 into the penetration chamber R is completed, the chemical solution is injected from the high-pressure jet nozzle 36 to stop the water in the penetration chamber R.

Therefore, the penetrating ring 13 is the same as in the first embodiment.
Can be smoothly penetrated into the penetration chamber R,
The structure for supplying the high-pressure jet can be simplified, and the construction cost can be reduced.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY As described above, the present invention, when the penetration ring of the first shield machine is penetrated into the penetration room of the second shield machine, the earth and sand and the gravel clogged in the penetration room while digging underground. Since the penetrating ring is made to penetrate by blowing away the etc. with a high-pressure jet, it is possible to cleanly clean the earth and sand and gravel that block the inside of the penetrating chamber, and insert the penetrating ring smoothly and securely into the penetrant material You can

[Brief description of drawings]

FIGS. 1 and 2 show a first embodiment of a method for penetrating a penetration ring of an underground joint type shield machine according to the present invention, and FIG. 1 shows the vicinity of the penetration ring of the first shield machine and the first embodiment. 2 is a side cross-sectional view of a part of the vicinity of the penetration chamber of the shield machine of FIG. 2, FIG. 2 is a penetration ring and a part of the vicinity of the penetration chamber showing a state where the penetration ring of the first shield machine is penetrated into the penetration chamber of the second shield machine. FIG. 3 is a side sectional view of the second embodiment of the present invention, and FIG. 4 is a side sectional view of a part of the second shield machine near the penetration chamber. FIG. 4 is a side cross-sectional view of the first and second shield machines for excavating the ground near the joint, and FIG. 5 is the first and second state in which the cutter device is contracted before joining. FIG. 6 is a side sectional view of the second shield machine, and FIG. 6 is a side view of the shield machine showing a state where the penetration ring is penetrated into the penetration chamber. Rear view, FIG. 7 is a side sectional view of a state in which by disassembling the shield machine to complete the tunnel tunnel. G ... Ground, Gi ... Tunnel junction ground, 1 ... 1st shield machine, 2 ... 2nd shield machine, 1a, 2a ... Skin plate, 1b, 2b ... Skin plate tip part 11,2
1 ... Outer cylinder, 12, 22 ... Inner cylinder, 13 ... Penetration ring, R ...
Penetration chamber, 36 ... High pressure jet nozzle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Miyazawa 2-16-1 Kyobashi, Chuo-ku, Tokyo Within Shimizu Construction Co., Ltd. (72) Inventor Akihiro Honda 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hiroyuki Kubo 2-161-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hisao Arai 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Ken Incorporated Co., Ltd. (72) Inventor Nobuhiro Tsuchiya 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation Incorporated (72) Inventor Takao Nakagawa 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction In-house (72) Inventor Yoshihiko Shimizu 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yoji Toyoji 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Stock Association The inner

Claims (3)

[Claims] 1. A first shield machine in which a front end portion of a skin plate is double formed by an outer cylinder and an inner cylinder, and a penetration ring is housed between the outer cylinder and the inner cylinder. A second shield machine having a penetration chamber for penetrating the penetration ring is formed by forming a double end portion of the skin plate with an outer cylinder and an inner cylinder having the same diameter as the first shield machine. A method of penetrating a penetration ring of an underground junction type shield machine for excavating tunnels from both sides in the ground as a set and joining them in the middle, wherein the penetration ring of the first shield machine is replaced by a second shield machine. When penetrating into the penetration chamber of No. 1 and joining, the underground ring is characterized by penetrating the penetration ring by blowing off the sand and gravel, etc., which were clogged in the penetration chamber with a high pressure jet while excavating the ground. Penetration of type shield machine The method of penetration. 2. The blow-in ring is inserted while ejecting a high-pressure jet from the tip of the push-in ring when blowing out the sand, gravel, etc., which are clogged in the push-in chamber. Penetration method of the underground joint type shield machine. 3. The blow-in ring is inserted after the high pressure jet is jetted from the back of the penetration chamber to secure the space of the penetration chamber when the sand, gravel, etc. clogged in the penetration chamber are blown off. The method for penetrating a penetrating ring of an underground joint type shield machine according to claim 1.