JP2788955B2 - Track laying method and track laying device in shield construction - Google Patents

Description

The present invention relates to a method and an apparatus for laying a track in a tunnel in shield construction.

"Conventional technology and its problems" As is well known, the shield method excavates the ground with a cutter device provided at the front of a cylindrical outer shield machine,
This is a method of assembling a segment that is a cylindrical divided body inside the shield machine, taking a reaction force from the assembled segment, moving the entire shield machine forward, and repeating these steps to form a tunnel in the ground.

By the way, in the shield construction as described above, a trailing bogie connected and towed to the rear side of the shield machine,
A trajectory for running a transport trolley for transporting various materials is laid in the tunnel, and the trajectory is sequentially extended toward the face as the shield machine advances. In the past, such track extension work was performed by relying on human labor, but in recent years, labor saving and automation of shield construction have been demanded. It has been desired to provide means that can be performed efficiently.

Means for Solving the Problems The invention according to claim 1 is a method for laying a track in a tunnel in shield construction, wherein a rail and a sleeper supporting the rail are preliminarily assembled and foldable. After the track unit is transported to the laying position in a folded state using the set track unit, the track unit is spread and connected sequentially to the front side of the laid drive unit. .

The invention according to claim 2 is a track unit that is mounted on a succeeding bogie that is towed by a shield machine and travels in a tunnel, and in which a rail and a sleeper that supports the rail are preliminarily assembled and foldable. A track laying device that extends a track for running a succeeding bogie toward a face by connecting and laying, and a suspending means capable of suspending the track unit; And a drive mechanism for guiding the suspended track unit to a position immediately above the laying position in front of the succeeding bogie by moving the bogie unit in front of the bogie.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 show a first embodiment of a track laying device according to the present invention. This device is mounted on a trailing bogie 2 which is connected to a shield machine (not shown) by a linking material 1 and towed, and the trailing bogie 2 runs by sequentially laying track units 3 in a tunnel. Is configured to extend to the face side.

As shown in FIGS. 1 to 4, the track unit 3 includes three to six rails 4 each having a predetermined length (for example, 5 m).
Five sleepers 5 for supporting the rails 4 and five struts 6 for supporting the sleepers 5 are pre-assembled, and each sleeper 5 is divided into two at its central position. The track unit 3 is rotatably supported by pins 7 with respect to the columns 6 so that the track unit 3 can be folded into two. The track unit 3 is transported in a folded state to a laying position, where it is spread, and then laid and connected in front of the already laid track unit 3.

In addition, as shown in FIG.
A hook 8 is attached to the base end of each of the divided sleepers 5, and the hook 8 is attached to the upper end of the support 6.
Are provided, and when the track unit 3 is spread when laying, the hooks 8 and the protrusions 9 are engaged, and unless the engagement is released, the track unit 3 cannot be folded again. It has been like that.

Of the three-to-six rails 4, two-to-four rails 4 on both sides are tracks for the trailing truck 2, and two rails 4 at the center are used for transporting the track unit 3 and other various materials. This is a track for the transport vehicle 10.

The device for laying the track unit 3 has a configuration in which a trolley (suspension means) 21 is movably provided on two guide beams 20 attached to the upper surface of the succeeding bogie 2 so as to protrude forward. ing. As shown in FIG. 2, both ends of a wire 22 are connected to the trolley 21.
It is wound on pulleys 24 and 25 attached to the driving winch 23 and the distal and proximal ends of the guide beam 20, respectively. By driving the two winches 23 in synchronization, the trolley 21 is attached to each guide beam 20. It is designed to move along. Guide beam 20, wire 22, winch above
The drive mechanism 26 for moving the trolley 21 is constituted by the pulleys 23 and the pulleys 24 and 25.

Also, the trolley 21 has a pantograph mechanism 30,
A wire 31 and a connecting mechanism 32 are provided below the pantograph mechanism 30.
The track unit 3 to be laid is suspended from the vehicle, and the track unit 3 can be moved up and down by vertically expanding and contracting the pantograph mechanism 30 with a cylinder 33. Also, this trolley 21
A cylinder 34 is also provided for expanding the track unit 3 suspended in a folded state prior to laying. The cylinder 34 is composed of a plate 35 attached between the two columns 6, 6 of the track unit 3 and a pantograph mechanism 30.
When the cylinder 34 is extended, the column 6 is pushed down, and each sleeper 5 rotates around the pin 7 as shown by the arrow in FIG. It is spreading.

In addition, as shown in FIG. 4, it is preferable that the suspension point of the track unit 3 is located on the inner side depending on the position of the center of gravity G of each sleeper 5. If the suspension point is outside the center of gravity G, the track unit 3 is spread by its own weight and is not stable.

In order to lay a track by the above-mentioned device, first, a track unit 3 to be laid is loaded on a transport vehicle 10 traveling in the center of a tunnel, and is transported to a position inside the subsequent vehicle 2. Then, after the connecting mechanism 32 is connected to the track unit 3, the pantograph mechanism 30 is retracted by a young person, and
, The track unit 3 is lifted up, the carriage 10 is retracted, and the winch 23 is driven to advance the trolley 21 to guide the track unit 3 directly above the laying position (this state is shown in FIG. 2). . Then, the track unit 3 is expanded by operating the cylinder 34, and then the pantograph mechanism 30 is extended by operating the cylinder 33 to lower the track unit 3. At this time, the track unit 3 is simultaneously moved.
Is connected to the tip of each rail 4 of the installed track unit 3. Since the stretching operation is completed as described above, the above operation is repeated as the shield machine advances.

As described above, by using the track unit 3 in which the rail 4, the sleeper 5, and the support column 6 are preliminarily foldable and assembled and transported in a folded state, and expanded when laying, the track unit 3 The mechanization of the stretching operation can be realized and automation can be achieved, and there is an advantage that the working efficiency can be greatly improved. As a result, the shield work can be automated.

Next, a second embodiment will be described with reference to FIGS. 5 to 7. The same reference numerals are given to the same components as those in the first embodiment, and the description will be omitted.

In the apparatus of the second embodiment, as shown in FIG. 7, the distal end side of the guide beam 20 is bent toward the side of the tunnel. As shown in FIG. 6, two hoists (suspension means) 41 for suspending the track unit 3 by wires 40 are provided movably along the guide beam 20. In addition, since the distal end of the guide beam 20 is bent to the side, a pulley 42 for attaching the wire 22 for moving the trolley 41 along the guide beam 20 is attached to the guide beam.

In the apparatus of the second embodiment, when the track unit 3 transported by the transport carriage 10 in a folded state is suspended by the hoist 41 and the winch 23 is driven to advance the hoist 41, the hoist 41 Since the vehicle is guided by 20 and naturally moves to the side of the tunnel, the track unit 3 is naturally expanded. So, hoist 41
Is operated to lower the track unit 3 and connect it to the front side of the installed track unit 3 to complete the extending operation.

In the first embodiment and the second embodiment,
The track unit 3 in a form in which the sleeper 5 is divided into two and rotatably connected to the column 6 is employed. As the track unit 3, for example, a folding pattern as shown in FIGS. 8 to 9 is used. What is necessary is just to adopt what can be suitably employ | adopted, as long as it is a form which can be folded compactly and conveyed, and can be expanded before laying.

When the diameter of the tunnel is large, the eleventh
As shown in the figure, it is preferable to adopt a track unit having a form in which the crossties 5 are supported by two pillars 6, 6, and in this case, the folding pattern of the track unit is, for example, as shown in FIGS. 12 to 22. What is shown can be adopted as appropriate. Among them, the one shown in FIG. 21 is the one shown in FIG. 12,
In addition, what is shown in FIG. 22 is a form in which the thing shown in FIG. 17 is transported and laid while being divided into two without being connected.

In addition, as shown in FIG.
It is also possible to adopt a track unit in which five members are connected by pins 7. Such a track unit can also be laid by using the same device as the laying device of the first embodiment or the second embodiment, but the one shown in FIG. 23 and FIG. Center two wires 50
By the connecting mechanism 51, and each sleeper 5,
The track unit is configured to be expanded by pulling up a total of four wires 52 that are connected two by two through the same connection mechanism 32 as described above.

Of course, the configuration of the laying device is not limited to the above,
It can be changed as appropriate in consideration of the folding pattern of the track unit.

[Effects of the Invention] As described in detail above, according to the invention of claim 1, the rail and the railroad ties supporting the rail are assembled in advance and a track unit that is foldable is used. After the unit is transported to the laying position in the folded state, the track unit is expanded and connected sequentially to the front side of the laid track unit, so that the track extension work can be mechanized and automated. The working efficiency can be greatly improved.

According to the second aspect of the present invention, the suspension means capable of suspending the track unit, and the track unit suspended by moving the suspension means forward of the succeeding bogie are provided in front of the subsequent bogie. Since the drive mechanism that guides directly above the laying position is mounted on the succeeding bogie, the positioning and laying of the track unit can be easily performed, and the method is suitable for performing the above method.

[Brief description of the drawings]

1 to 4 show a first embodiment of a track laying device according to the present invention. FIG. 1 is a front view, FIG. 2 is a side view, and FIGS. FIG. 3 is a partially enlarged view showing an example of a track unit used in the device. 5 to 7 show a second embodiment of the track laying device according to the present invention. FIG. 5 is a front view, FIG. 6 is a side view, and FIG. 7 is a plan view. 8 to 10 are diagrams each showing another example of the folding pattern of the track unit used in each of the above embodiments. FIG. 11 is a view showing another example of the track unit, and FIGS. 12 to 22 are views each showing a folding pattern of the track unit. FIGS. 23 and 24 show still another embodiment of the track unit. FIG. 23 is a front view, and FIG. 24 is a side view. 2 ... following truck, 3 ... track unit, 4 ... rail, 5 ... sleeper, 6 ... support, 7 ... pin, 8 ... hook, 9 ... projection, 10 ... carrier truck, 20 ... ... Guide beam, 21 ... Trolley (suspension means), 23 ... Winch, 26 ... Drive mechanism, 30 ... Pantograph mechanism, 32 ... Connecting mechanism, 33,34 ... Cylinder, 41 ... Hoist (suspension) Holding means).

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Exit Taneomi 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Taikichi 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Inside (72) Inventor Shunichi Sakai 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Kenji Watanabe 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction ( 72) Inventor Hideki Hagiwara, 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hiroshi Iijima 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hiroyuki Kubo 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Tohru 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yoshiaki Negami 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Kazuo Miyazawa 2-6-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (58) Survey ⁶ (Int. Cl. ⁶ , DB name) E21F 13/00, 13/02 E21D 11/40

Claims (2)

(57) [Claims] 1. A method for laying a track in a tunnel in a shield construction, wherein a track and a sleeper supporting the rail are preliminarily assembled integrally and a foldable track unit is used. A method of laying a track in a shield work, comprising: transporting a folded unit to a laying position, and then connecting it to a front side of the laid drive unit in an expanded state. 2. A rail mounted on a succeeding bogie that runs in a tunnel by being pulled by a shield machine, and a rail and a sleeper that supports the rail are assembled together in advance and laid while connecting a collapsible track unit. A track laying device that extends the track for the subsequent bogie to travel toward the face, and a suspending means capable of suspending the track unit and the suspending means in front of the subsequent bogie. And a drive mechanism for guiding the suspended track unit by moving the track unit directly above a laying position in front of a succeeding bogie.