JPH064996B2 - Penetration ring extrusion equipment for underground joint type shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention is used for an underground joining method in which a tunnel is dug from both ends of a tunnel to be constructed and these are joined midway to complete the tunnel. The present invention relates to a penetration ring extruding device for an underground joint type shield machine.

“Conventional technology” Conventionally, tunnel construction in cities has been accompanied by pollution problems such as noise and vibration, as well as complicated conditions such as congestion on the surface and underground with existing workpieces, deepening of the tunnel itself, and securing road surface traffic. Therefore, the shield construction method that can be constructed day and night with low vibration and low noise without excavating the ground is rapidly increasing the construction results as a construction method that meets the above conditions. In addition, the application of the shield method, which enables safe and reliable tunnel construction while preventing the collapse of the ground to be excavated even on flat land with a lot of soft ground such as along the sea, as well as on the riverbed and seabed, is increasing. I am doing it.

In recent years, in the shield method, excavating starter shafts at positions corresponding to both ends of a tunnel to be built, excavating tunnels from these starter shafts with two shield excavators, and joining them on the way. A method called underground bonding method is used to complete the tunnel by. In this underground joining method, the tunnel is excavated by using two shield excavators, which leads to shortening of the construction period and can be said to be a very efficient method. However, since the diameters of the respective skin plates, which are the cylindrical outer shells of the shield machine, are of course the same, if these shield machines are brought into contact with each other at the tunnel junction, the front surface of the shield machine will This results in damage to the cutter device provided in the above, and it is necessary to take some measures at this tunnel junction.

Therefore, the present applicant has previously proposed an underground welding method for a shield tunnel that can safely and reliably perform the tunnel welding work and can significantly reduce the construction cost and construction period (Japanese Patent Application No. 61). -101810). This underground joining method will be described with reference to FIGS. 7 to 10.

In this underground joining method, first of the two shield machines,
The tip of the cylindrical skin plate 1a, which is the outer shell of the first shield machine 1, is double formed by the outer cylinder 11 and the inner cylinder 12, and the cylindrical shape is provided between the outer cylinder 11 and the inner cylinder 12. The penetration ring 13 (about 1 m in length) is stored, and the tip of the skin plate 2a of the second shield machine 2 is formed by an outer cylinder 21 and an inner cylinder 22 having the same diameter as that of the first shield machine 1. The penetrating chamber 23 is formed in a double layer to allow the penetrating ring 13 to penetrate therethrough. Also, behind the penetration ring 13,
Extrusion jacks 14, 14 for extruding the penetrating ring 13,
Are installed at intervals in the circumferential direction of the skin plate 1a.

Next, while excavating the natural ground G by the cutter devices 10 and 20 provided at the tips of the first and second shield machines 1 and 2,
The walls of the pits excavated at the rear of the shield machines 1 and 2 are lined with segments 3a and 3b, and reaction forces are applied to the tips of the segments 3a and 3b to propel jacks 15 and 2.
The tunnels Ta and Tb are built by driving 5, ... (FIG. 7).

And in the junction part of a tunnel, the 1st shield machine 1 and the 2nd shield machine 2 are made to oppose each other, leaving the ground Gi (about 30 cm-1 m) of predetermined length (FIG. 8). ).

Next, the push-out jack 14 of the first shield machine 1 is driven so that the tip of the penetration ring 13 causes the second shield machine 2 to move.
The penetration ring 13 is inserted into the penetration chamber 23 between the outer cylinder 21 and the inner cylinder 22 of the first shield machine 1 until it is inserted.
Slide forward along the axis of. That is, the penetration ring 13 allows the first shield machine 1 and the second shield machine 2 to
It covers the ground Gi left between and (Fig. 9).

Then, the cutter devices 10 and 20 are disassembled and removed, both ends of the penetration ring 13 are welded to the inner cylinders 12 and 22, and the cast-in-place concrete 30 is placed on the inner wall surfaces of the skin plates 1a and 2a. Then, the wall surface of the tunnel junction is covered and the construction is completed (Fig. 10).

According to the underground joining method described above, the penetration ring 1
By 3, it is possible to do soil retaining and water stop at the tunnel junction, so it is possible to safely and reliably join the tunnel without using an auxiliary construction method, and the construction cost and construction period are greatly reduced. It becomes possible to do.

[Problems to be Solved by the Invention] By the way, in the above-mentioned underground joining method proposed by the present applicant, the penetrating ring 13 is used only at the time of tunnel joining just before the completion of the tunnel construction. It is uneconomical to equip the first shield machine 1 with the extrusion jacks 14 for exclusive use of extrusion in advance, and in order to secure a large extension amount (about 1 m), the extrusion jack is required. Since a relatively large-scale jack is required for 14, and therefore a large jack mounting space within the first shield machine 1 is required to be secured, the space within the first shield machine 1 can be efficiently used. It hinders utilization and results in lengthening the overall length of the shield machine 1.
That left a point to be further resolved.

The present invention, in an underground junction type shield machine used in the underground junction method of a tunnel, how to realize a penetration ring extrusion device capable of effectively utilizing the space inside the shield machine and reducing the cost of the shield machine itself. I have a problem.

"Means for Solving Problems" According to the present invention, the distal end portion of the skin plate is double formed by the outer cylinder and the inner cylinder, and the penetrating ring is housed between the outer cylinder and the inner cylinder. And a first seal machine, and the tip of the skin plate is double formed by an outer cylinder and an inner cylinder having the same diameter as the first shield machine, so that the penetration ring is penetrated. The second is formed at the tip
In the underground joint type shield machine which excavates the tunnel to be built as one set with the shield machine from both side ends and joins them in the middle to complete the tunnel, one end of which is attached to the penetration ring. Underground joint type shield machine in which the other end of the rod is projected into the first shield machine, and the penetration ring pushing jack having the mounting rod as a piston rod is detachably mounted in the first shield machine. The above-mentioned problem is solved by constructing the penetration ring extruding device.

[Operation] In this invention, since the penetration ring extruding jack is detachably attached, the extruding jack may be attached only when the penetration ring is pushed out, for example, after removing the shield jack equipped in the shield machine. By attaching the extrusion jack to a position where the shield jack is removed, a space dedicated to the extrusion jack is unnecessary, and it is possible to save space in the shield machine.

[Examples] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 6 are views showing a penetration ring extrusion device of an underground joint type shield machine which is an embodiment of the present invention. In the following description, the same components as those of the shield machine in the underground joining method proposed by the present applicant will be designated by the same reference numerals and the description thereof will be omitted.

The difference between the shield machine described above and the shield machine that is an embodiment of the present invention is the first shield machine 1,
That is, a plurality of attachment rods 16, 16, ... Are attached to the rear end of the penetration ring 13 at intervals in the circumferential direction of the penetration ring 13, and the first shield machine 1 is also provided.
It is a point that push-out jacks 17, 17, ... Using the mounting rods 16, 16, ... As piston rods are removably mounted therein. Therefore, in the following description, the first shield machine 1 will be mainly described in detail.

A pressure bearing plate 18 is provided between the outer cylinder 11 and the inner cylinder 12 of the first shield 1 so as to connect them and to be substantially orthogonal to the axis of the shield machine 1. One end 16a of the mounting rod 16 is pin-attached to the rear end of the penetrating ring 13, and the other end 16b penetrates the bearing plate 18 in the thickness direction, and the bearing plate 18 A plurality of through holes 18a, 18a, ... Formed at intervals in the circumferential direction are penetrated to project into the first shield machine 1. This mounting rod 16
A female screw hole 16c is formed in the other end 16b of the.

The mounting rods 16, 1 are provided on the rear surface of the pressure support plate 18.
Extrusion jacks 17, 1 with 6, ... as piston rods
7, ... are detachably attached. Here, on the rear surface of the bearing plate 18, similarly, the shield jacks 15, 1 are provided.
Since the first shield machine 1 is viewed along its axis, the push jacks 17, 17, ... And the shield jacks 15, 15 ,.
A configuration in which the first shield machines 1 are alternately arranged in the circumferential direction is preferable.

The push jack 17 is a so-called center hole type jack, and has a substantially cylindrical piston 17a, a bottomed double cylindrical cylinder 17b into which the piston 17a is fitted,
It is roughly configured by a gap between the piston 17a and the cylinder 17b, that is, an oil injection pipe (not shown) for press-fitting oil into the oil sump 17c. At the rear end of the piston 17a, a gripping tool 17d that grips the mounting rod 16 or the like, which is a piston rod, is mounted.

The method of joining tunnels using this shield machine 1 is
This is almost the same as the above-mentioned underground joining method previously proposed by the applicant. That is, (i) first, with the extrusion jacks 17, 17, ... Removed, the first shield machine 1 and the second shield machine 2 leave the first and second shield machines 1 and 2 with a natural ground Gi of a predetermined length. The two shield machines 1 and 2 are opposed to each other, and in this state, the excavation by the shield machines 1 and 2 is stopped.

(ii) Next, the shield jacks 15, 15, ... And unnecessary equipment behind the cutter device 10 are dismantled and removed to prepare for tunnel junction (FIG. 3).

(iii) Then, using the mounting rods 16, 16, ... As piston rods, the push jacks 17, 17, ... Are mounted on the rear surface of the pressure support plate 18, and the piston 17
The mounting rods 16, 16, ... Are gripped by the grippers 17d, 17d ,. Here, when the length of the protruding portion of the mounting rods 16, 16, ... Is short, the rods 19, 19, ..
.. are grasped (FIG. 4).

(iv) Next, by supplying oil from an oiling pipe (not shown) of the pushing jack 17 to urge the piston 17a toward the front of the first shield machine 1, the mounting rod 16, and thus the penetration ring. 13 is pushed forward along the axis of the shield machine 1 (Fig. 5).

(v) Further, the step (iv) is repeated while replenishing the rods 19, 19, ... until the penetration ring 13 penetrates into the penetration chamber 23 of the second shield machine 2. The ring 13 is extruded.

After this, the cutter device 1 is used in the same manner as the underground joining method described above.
0, 20 etc. are dismantled and removed, both ends of the penetration ring 13 are welded to the inner cylinders 12, 22 and concrete is placed on the inner surfaces of the skin plates 1a, 2a for lining and tunneling. Is completed.

With the method described above, the penetration ring 13 can be inserted into the penetration chamber 23 of the second shield machine 2. Here, the pushing jack 17 for pushing out the penetrating ring 13 is detachably attached, and the pushing jack 17 is the shield jack 1.
Since it is possible to attach 5 to the removed position, there is no need for a jack space dedicated to the extrusion jack 17, so that the space inside the shield machine 1 can be effectively used, and the entire length of the shield machine 1 can be extended. By shortening it, it is possible to configure the shield machine 1 with a small turning radius.

Further, since the push jack 17 may be mounted in the shield machine 1 only when the penetration ring 13 is pushed, the push jack 17 can be diverted and the cost of the shield machine 1 itself can be reduced.

In particular, in this embodiment, a center hole type jack is used for the pushing jack 17. Since this center hole type jack has a relatively small size and a short stroke, the mounting space is small and the rod 19 is not required. It has an advantage that it is possible to secure a required long stroke by simply adding a proper amount.

Therefore, in the underground joint type shield machine used for the underground joint method of the tunnel, it is possible to realize the penetration ring extrusion device which can effectively utilize the space inside the shield machine and reduce the cost of the shield machine itself.

The penetration ring extrusion device of the underground joint type shield machine according to the present invention is not limited to the above-mentioned embodiment. As an example, the push-out jack 17 for pushing out the penetrating ring is not limited to the center hole type as in the above-mentioned embodiment, and may be any jack that uses the mounting rod 16 as a piston rod.
Any known jack may be selected as appropriate. Also, the method of use is not limited to the method described in the above embodiment,
If there is an appropriate gap between the shield jacks 15 and 15, the push jack 17 may be preliminarily equipped to eliminate the trouble of attaching the push jack 17.

[Advantages of the Invention] As described in detail above, according to the present invention, the other end of the mounting rod, one end of which is attached to the penetration ring of the first shield machine, is projected into the first shield machine, and Since the penetration ring extruding device of the underground joint type shield machine is configured such that the penetration ring extruding jack having the mounting rod as the piston rod is detachably attached to the inside of the first shield machine, the inside of the first shield machine is constituted. It is possible to dismantle and remove equipment such as a shield jack installed in the above, and then to install the penetration ring pushing jack. Therefore, since the jack space dedicated to the extrusion jack is not required, it is possible to effectively use the space inside the shield machine.Also, this extrusion jack can be installed inside the shield machine only when the penetration ring is pushed out. It can be diverted and can contribute to the cost reduction of the shield machine itself. Therefore, in the underground joint type shield machine used for the underground joint method of the tunnel, it is possible to realize the penetration ring extrusion device which can effectively utilize the space inside the shield machine and reduce the cost of the shield machine itself.

[Brief description of drawings]

FIG. 1 to FIG. 6 are views showing a penetration ring extrusion device of an underground joint type shield machine which is an embodiment of the present invention,
1 is a cross-sectional view showing the entire shield machine, FIG. 2 is a cross-sectional view showing an enlarged main part of FIG. 1, FIG. 3 is a cross-sectional view showing a state in which a shield jack is removed, and FIG. The figure is a cross-sectional view showing a state in which the push-out jack is attached, FIG. 5 is a cross-sectional view showing a state in which the penetration ring is pushed out by the push-out jack, and FIG. 6 shows a state in which the rod is extended and the push-in ring is further pushed out. Sectional views, FIGS. 7-10
The figure shows the underground joining method for shield tunnels. Fig. 7 is a cross-sectional view showing the state of excavating the ground by two shield machines, and Fig. 8 shows the ground of a predetermined length. Sectional view showing a state in which excavation is stopped while remaining, FIG. 9 is a sectional view showing a state in which the penetration ring is extruded, and FIG.
The figure is a cross-sectional view showing a state in which the lining of the tunnel is completed. Ta, Tb ... tunnel, 1 ... first shield machine, 2 ... second shield machine, 1
a, 2a ... Skin plate, 11, 21 ... Outer cylinder, 1
2, 22 ... Inner cylinder, 13 ... Penetration ring, 16 ... Mounting rod, 17 ... Extrusion jack, 23 ... Penetration chamber.

 ─────────────────────────────────────────────────── ─── 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 (1)

[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 penetrating ring is housed between the outer cylinder and the inner cylinder. The front end portion of the skin plate is doubled by an outer cylinder and an inner cylinder having the same diameter as the first shield machine, so that a penetration chamber into which the penetration ring penetrates is formed in the front end portion. Two
This is a penetration ring extruding device for an underground joining type shield machine in which a tunnel to be built as one set with the shield machine is dug from both ends of the tunnel and the tunnels are joined midway to complete the tunnel. Is a mounting rod having one end attached to the penetrating ring and the other end protruding into the first shield machine, and detachably attached to the first shield machine, the mounting rod being a piston rod. A penetration ring extruding device for an underground joint type shield machine, comprising: