JP2639446B2 - How to connect shield machine to shaft - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for connecting a shield machine to a shaft, and more particularly to a method for connecting a shield machine with a penetration ring at the front or a front end of a skin plate ahead of a cutter device. The present invention relates to a method of connecting a shield machine to a shaft when a shield machine configured to be able to protrude to a vertical shaft formed by a caisson or the like is joined after joining.

[Conventional technology]

As a method of connecting the shield machines to the shaft after the shield machines have reached the shaft, for example, the following means have conventionally been adopted.

For one, the penetration of the shield machine is formed in the shaft of the shaft,
There is a method of excavating the penetrating portion with a cutter device of a shield machine, thereby projecting the shield machine into the shaft wall, and grouting the periphery of the penetrating portion and joining.

Alternatively, when constructing a shaft, a steel sheet pile is temporarily installed in front of the shield machine connection part of the shaft, a shield machine receiving device is installed on the vertical wall, and then the receiving device is buried by backfilling the inside of the steel sheet pile. Then, the steel sheet pile is pulled out and removed, and the receiving device is connected to the shield machine that has arrived.

[Problems to be solved by the invention]

By the way, the conventional methods have the following disadvantages.

In other words, in the former method, since the intrusion is excavated with a shield machine, it is necessary to reinforce the wall constituting the shaft, which not only increases the construction cost of the shaft but also increases the connection when the groundwater pressure is high. And it is difficult to stop water around the connection after connection.

On the other hand, the latter method has the advantage that connection work can be performed smoothly by the receiving device and that measures against water stoppage can be taken easily. In addition, there is a disadvantage that the construction cannot be performed when the construction depth of the shield tunnel is large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is directed to a shield machine shaft that can completely stop water and the like by simple means and can be effectively applied to a shield tunnel at a large depth. The purpose of the present invention is to provide a connection method.

[Means for solving the problem]

According to a first aspect of the present invention, there is provided a cutter device, a cylindrical skin plate, and a penetrating ring provided at a front end of the skin plate so as to be double with the skin plate and configured to be able to protrude forward from the cutter device. Is a method of joining after reaching a shaft formed by a caisson or the like, in advance, at the joint of the wall constituting the shaft with the shield machine, the penetration ring, A pressure receiving sealing material having substantially the same diameter as a ring is buried so as to be flush with the outer surface of the wall body, and after the shield machine reaches the junction of the shaft, the penetrating ring is removed from the cutter device. By projecting the front end of the penetrating ring into the pressure receiving sealing material, and then removing the portion of the wall corresponding to the inside of the pressure receiving sealing material, the inside of the shaft and the inside of the shield machine are connected. Passing And it is characterized in Rukoto.

Further, a second invention of the present invention provides a shield machine comprising a cutter device and a tubular skin plate, wherein the entire skin plate is configured to protrude forward from the cutter device by a caisson or the like. A method of joining after reaching a configured shaft, and a ring-shaped pressure-receiving sealing material having a diameter substantially the same as the front end of the skin plate at a joint of the wall constituting the shaft with the shield machine in advance. Is buried so as to be flush with the outer surface of the wall, and after the shield machine reaches the junction of the shaft, the entire skin plate is protruded from the cutter device to make the front end of the skin plate Is penetrated into the pressure receiving sealing material, and thereafter, the inside of the shaft and the inside of the shield machine are communicated by removing a portion of the wall body corresponding to the inside of the pressure receiving sealing material. Than it is.

[Action]

In the first invention, when the shield machine reaches the target shaft, the penetrating ring is projected forward to penetrate the pressure receiving sealing material embedded in the wall of the shaft. With this simple operation, a water stop structure between the shield machine and the shaft wall is established. Thereafter, the inside of the shaft and the inside of the shield machine are communicated with each other by removing (breaking) a portion corresponding to the inner diameter of the shield machine on the shaft wall surface with a filer or the like.

In the second invention, instead of the penetration ring according to the first invention, the skin plate itself may be protruded forward from the cutter device to penetrate the pressure receiving sealing material. Other operations are the same as those of the first invention.

〔Example〕

Hereinafter, an embodiment of the first invention of the present invention will be described with reference to the drawings.

First, an example of a shield machine used in the present embodiment will be described with reference to FIG.

This shield machine 1 has a cutter device 3 at the tip and a skin plate 4 on the outer periphery, like the ordinary shield machine, and a penetrating ring chamber is provided on the inner peripheral surface at the tip of the skin plate 4. 5 is provided, and the penetration ring chamber 5 is provided.
Inside, a cylindrical penetration ring 6 is provided so as to be double with the skin plate 4. Behind the penetrating ring 6, there is provided an extrusion jack 7 for projecting the penetrating ring 6 forward from the cutter device 3. Further, a telescopic cutter 8 is provided inside the cutter device 3 so as to be able to advance and retreat along the radial direction of the skin plate 4. The telescopic cutter 8 is set to have a length that allows the telescopic jack 9 attached to the cutter device 3 to expand and contract between the outer peripheral surface of the skin play 4 and the inner side of the inner diameter of the penetration ring 6. This is because the ground is usually cut with a width corresponding to the outer peripheral surface of the skin plate 4 during excavation, and when the penetration ring 6 is extruded as described later, the penetration ring 6
This is to prevent the contact. In the drawing, reference numeral 11 denotes a propulsion jack for propelling the shield machine in the ground by applying a reaction force to the segment 30 assembled at the rear part of the skin plate 4, and 12 denotes a partition.

FIG. 2 shows a part of a wall 16 constituting a shaft 15 to which the shield machine 1 is connected. In this case, the wall 16
Is composed of a caisson made of concrete. Outer surface 16 of wall 16 constituting shaft 15
On the a side (ground side), a pressure receiving sealing material 17 formed in a ring shape having substantially the same diameter as the penetrating ring 6 is provided at a portion where the shield machine 1 is to reach, with an outer surface 16 a of the wall body 16. It is buried to be flush. The pressure receiving sealing material 17 is made of a material having elasticity (deformability) and sealing properties, such as rubber. In this embodiment, the pressure receiving sealing material 17 is formed in a rectangular shape in cross section as shown in the drawing, and has a configuration having a hollow portion 18 in the center of the cross section. Further, in this case, since the wall 16 is formed of a caisson, the pressure receiving sealing material 17 is integrated with the caisson in advance at the time of manufacturing the caisson, that is, before embedding it in the ground. It is provided on the wall 16. Further, in this embodiment, as shown in FIG. 3, grout pipes 20, 20,... Penetrating in the thickness direction of the wall 16 are provided on the outer peripheral portion of the pressure receiving sealing material 17. Is provided so as to be in close proximity to the device.

Next, an embodiment of the first invention of the present invention based on the above configuration will be described with reference to FIGS.

FIG. 4 shows the shield machine 1 digging underground toward a shaft 15 to be connected.
As described above, in this normal excavation state, the penetrating ring 6 is housed in the skin plate 4, and the telescopic cutter 8 of the cutter device 3 is protruded outward so that the outer diameter of the skin plate 4 is reduced. Excavation of the corresponding diameter is performed.

Also, as described above, the shaft 15
When approaching, the route is confirmed by chain boring or the like, and thereafter, a position correction excavation is performed based on the confirmation result.

When the shield machine 1 reaches a predetermined position on the wall 16 of the shaft 15 as shown in FIG. 5, the telescopic jack 9 is operated to retract the telescopic cutter 8 of the cutter device 3 inside. At the same time, the inside of the shield machine 1 is partially dismantled. In this state, the central axis of the shield machine 1 is aligned with the central axis of the pressure receiving sealing material 17 embedded in the wall 16.

When the above state is attained, the penetration ring 6 is pushed forward by operating the pushing jack 7 as shown in FIG.

The extruded tip of the penetrating ring 6 abuts on the pressure-receiving seal 17 as shown in the figure, and is further penetrated therein. The penetration ring 6 and the pressure receiving sealing material 17 are completely in contact with each other,
Thereby, the inside of the shield machine 1 is shut off from the outside.

Next, as shown in FIG. 7, required grouting is performed from the grout pipes 20, 20,... Installed on the shaft wall 16 and the grout pipes 21, 21,. The water blocking plate 22 is welded and closed between the rear part of the penetration ring 6 and the skin plate 4 and the inside of the shield machine 1 is further dismantled. After that, the portion of the wall 16 corresponding to the inside of the pressure receiving sealing material 17 is removed with a file. Thereby, the shaft 15 and the inside of the shield machine 1 are communicated, and the connection between the shield machine 1 and the shaft 15 is completed. In this state, the inside of the shield machine 1 is completely dismantled.

After that, as shown in FIG. 8, the secondary winding concrete 31 applied inside the segment 30 (temporary lining) is cast from the inside of the shield machine 1 to the opening of the wall 16 to form the shield tunnel 25 and the shaft. 15 is connected. Note that reference numeral 23 in FIG.
Is a water stop plate provided to enhance the water stop function between the shield machine 1 and the wall 16.

According to the above method, a large-scale receiving device is not required on the shaft 15 side, and no large-scale incidental work is required for that. Therefore, the shield machine 1 and the shaft 15 can be extremely easily and at low cost. Can be connected.
Further, since ancillary work with temporary steel sheet piles or the like is not required, the present invention can be applied to a shield tunnel at a large depth. In addition, since the wall of the shaft is not excavated by the shield machine itself as in the conventional method, it is not necessary to reinforce the wall body. Since the water-stopping structure is almost completely established only by projecting and penetrating the pressure-receiving sealing member 17, the water-stopping work can be extremely simple, such as attaching the water-stopping plates 22 and 23.

Next, an embodiment of the second invention of the present invention will be described.

The difference between the present embodiment and the above embodiment lies in the configuration of the shield machine used. In contrast to the configuration in which the shield machine 1 according to the above embodiment has the penetrating ring 6, The shield machine 2 does not have a penetrating ring as schematically shown in FIG. 9 and has a cutter slide mechanism 24 for drawing the cutter device 3 into the skin plate 4. Thereby, the skin plate 4 is configured to protrude relatively forward from the cutter device 3. It is the same as the above-mentioned shield machine 1 in that the cutter device 3 here is provided with a telescopic cutter 8, a telescopic jack 9 and the like and is configured so that the maximum outer diameter can be freely increased or decreased.

On the other hand, the configuration on the shaft 15 side in this embodiment is exactly the same as that in the above embodiment.

The operation method in this embodiment is almost the same as the above embodiment. As shown in FIG. 10, the shield machine 2 in this embodiment is
To connect after approaching 15, the telescopic jack 9 is first actuated from the state shown in the drawing to retract the telescopic cutter 8, and then the cutter slide mechanism 24 is operated as shown in FIG. While pulling into the skin plate 4, the propulsion jack 11 is driven to push the skin plate 4 (the entire shield machine 2) forward, so that the distal end of the skin plate 4 may penetrate into the pressure receiving sealing material 17. As a result, the skin plate 4 protrudes forward from the cutter device 3, and the pressure receiving sealing material 17 penetrates.

Other steps can be performed in the same manner as in the above embodiment.

In this embodiment, the same effects as those in the above embodiment can be obtained.

〔The invention's effect〕

As described above, according to the first invention and the second invention, a large-scale receiving device is not required on the shaft side,
In addition, since there is no need for large-scale additional work, the shield machine and the shaft can be connected extremely easily and at low cost, and no additional work such as temporary steel sheet piles is required. It can also be applied to deep tunnel shield tunnels. In addition, since the wall of the shaft is not excavated by the shield machine itself as in the conventional method, it is not necessary to reinforce the wall body. By penetrating the sealing material, it is made to be almost in a state close enough, and it is possible to obtain an excellent effect that sufficient water stoppage can be obtained only by simple supplementary work such as mounting a water stop plate.

[Brief description of the drawings]

1 to 8 show one embodiment of the first invention of the present invention. FIG. 1 is a side sectional view schematically showing a shield machine,
FIG. 2 is a partial sectional side view of a shaft, FIG. 3 is a partially enlarged sectional side view of a wall, and FIGS. 4 to 8 are side sectional views of a shaft and a shield machine, respectively. Figure, ninth
FIGS. To 11 show an embodiment of the second invention of the present invention, and FIG. 9 is a side sectional view schematically showing a shield machine.
FIG. 11 and FIG. 11 are side sectional views of a shaft and a shield machine for explaining the operation of this embodiment. DESCRIPTION OF SYMBOLS 1 ... Shield machine (1st invention), 2 ... Shield machine (2nd invention), 3 ... Cutter device, 4 ... Skin plate, 6 ... Penetration ring, 15 ... Shaft, 16 ... Wall Body, 16a ... outer surface, 17 ... pressure receiving seal.

Continued on the front page (72) Inventor Toshio Watanabe 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Shigeru Nishitake 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi (72) Inventor Yoshihiro Oishi 2-1-1, Araimachi, Arai-machi, Takasago City, Hyogo Prefecture Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (56) Reference JP-A-2-272193 (JP, A) JP Sho 63-47499 (JP, A)

Claims (2)

(57) [Claims] The present invention has a cutter device, a cylindrical skin plate, and a penetrating ring provided at a front end of the skin plate so as to be double with the skin plate and configured to protrude forward from the cutter device. A method of joining a shield machine after reaching a shaft formed by a caisson or the like, wherein a ring having substantially the same diameter as the penetrating ring is formed in advance at a joint of the wall constituting the shaft with the shield machine. Pressure receiving sealing material is buried so as to be flush with the outer surface of the wall, and after the shield machine reaches the junction of the shaft, the penetrating ring is protruded from the cutter device, and By penetrating the front end of the penetrating ring into the pressure receiving seal, and then removing the portion of the wall corresponding to the inside of the pressure receiving seal, the inside of the shaft and the inside of the shield machine are communicated. Characteristic connection method of shield machine to shaft. 2. A shield machine comprising a cutter device and a cylindrical skin plate, wherein the whole of the skin plate is configured to be able to protrude forward from the cutter device.
A method of joining after reaching a shaft formed by a caisson or the like, in advance, at a joint of the wall constituting the shaft with the shield machine, a ring shape having substantially the same diameter as the front end of the skin plate. The pressure receiving sealing material is buried so as to be flush with the outer surface of the wall body, and after the shield machine is brought close to the junction of the shaft, the entire skin plate is protruded from the cutter device to remove the skin. The inside of the shaft and the inside of the shield machine are communicated by making the front end of the plate penetrate into the pressure receiving seal, and then removing the portion of the wall corresponding to the inside of the pressure seal. How to connect the shield machine to the shaft.