JP2676454B2 - Piping method of cable protection tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of arranging a plurality of protective tubes for a cable for underground power transmission in a tunnel as a unit.

[0002]

2. Description of the Related Art In recent years, underground structures have tended to become overcrowded, so when installing cables for underground power transmission, the open-cut method cannot be adopted, and the shield method and push pipe Tunnels for burying cables are being excavated deep underground by the construction method.Furthermore, there is a marked tendency to lengthen tunnels due to difficulty in securing vertical shafts during tunnel excavation and cost reduction. A long-distance tunnel having a curved tunnel portion is adopted.

In order to arrange an underground power transmission cable in such a tunnel, conventionally, a cable protection tube unit formed by laminating a plurality of fixed length cable protection tubes is loaded on a trolley, The trolleys are installed over the entire length of the tunnel, pushing the rails from the vertical shaft into the tunnel while sequentially connecting the trucks in series in the vertical shaft. The space between the unit and the unit is filled with mortar to form a pipe.

[0004]

However, according to the above method of arranging the cable protection tube, when the tunnel is bent in the up-down direction or in the left-right direction, in particular, it is bent in an S shape. In this case, if the connection between the cable protection tube units loaded on the front and rear bogies is in a rigid connection, the bogie derails and falls off the track of the curved tunnel section, and If the connection between them is in a loose fitting state, there is a problem in that the connecting portion is disengaged and a pipe line communicating in series cannot be formed. This is, Ke
This is because it is not possible to absorb the vertical length difference or the horizontal length difference that occurs when the cable protection tube unit passes through the bent tunnel portion.

Further, since the cable protection tube unit connected in series from one vertical shaft side across the tunnel to the other vertical shaft side is pushed in one direction, if the tunnel length is long, the Not only does it take a long time to install, but there is a problem that a large pressing force is required to push the whole body and the end face of the cable protection tube is damaged. SUMMARY OF THE INVENTION An object of the present invention is to provide a piping method for a cable protection tube capable of completely solving such a problem.

[0006]

In order to achieve the above object, in the method of piping a cable protection tube of the present invention, firstly, a cable protection tube unit in which a plurality of fixed length cable protection tubes are laminated and arranged is trolleyed. There is a pressing plate that is loaded on the shaft from the vertical shaft to the predetermined position in the tunnel on the rail laid in the tunnel.
Pushing forward with a starter vehicle equipped with a pushing device, the rear end of the cable protection tube unit on the truck is pushed by a pushing plate.
By pressing, the front end of the cable protection tube unit is fitted to the rear end of the opposing protection tube of the cable protection tube unit on the carriage that has been loaded to a predetermined position on the rail. Then, a new being stacked on the dolly via a pressing device by the activation wheel and pressing device and again the starting wheel is retracted in the vertical shaft side
A new cable protection tube unit into the tunnel and push the front end of the cable protection tube unit to the pressing plate of the pressing device.
In the same manner as described above, it is fitted to the rear end of the preceding cable protection tube unit fixedly placed in the tunnel. Thus, the cable protection tube Yoo which is disposed a start vehicles in the tunnel
A series of cable protection tube units are installed in the tunnel by reciprocating between the knit- carrying carriage and the vertical shaft. On this occasion,
Connection of cable protection tube units in a curved tunnel section
When performing the above, press the pressing plate of the pressing device into a curved tunnel.
With the pressing plate tilted in the bending direction of the
The cable is protected by pressing the rear end face of the bull protection tube unit.
Place the front end of the tube unit behind the existing cable protection tube unit.
It is characterized by being fitted and connected to the end.

[0007]

[Function] On a trolley in which a starter vehicle equipped with a pressing device moves back and forth between a shaft and a tunnel, and a trolley for loading a cable protection tube unit connected to the front side thereof is first carried to a predetermined position in the tunnel. Since the work of connecting to the rear end of the cable protection tube unit is repeatedly performed, the pressing force from the starting vehicle side can be directly transmitted to the joint between the two units, and the length of the tunnel can be changed depending on the length. It is possible to connect the opposing cable protection tubes of the front and rear cable protection tube units without damaging the end surface of the cable protection tube with a relatively small pressing force without being damaged.

Furthermore, in the curved tunnel portion, the
Tilt the pressure plate of the pressure device in the bending direction of the curved tunnel.
In this condition, the cable protection tube unit is
Press the rear end face of the cable protection tube unit
Fit and connect to the rear end of the existing cable protection tube unit.
Things. Therefore, the rear end of the cable protection tube unit
The surface is pressed by the pressing plate with uniform force over the entire surface,
Circumference by fitting to occupy different engagement depth that the cable protection tube between the upper and lower cable protection tube and the left and right side of the cable protection tube Yu <br/> knit around engaged in accordance with the curvature of the curve tunnel The difference can be absorbed and does not lead to derailment of the truck from the rail or incomplete connection .

[0009]

EXAMPLE An example of the present invention will now be described with reference to the drawings. First, a tunnel 1 is excavated in the ground where a cable protection tube is to be buried. As shown in FIGS. 1 and 2, the tunnel 1 is formed from the starting shaft 2 to the reaching shaft 3 by the shield construction method.
It is a long-distance tunnel that is excavated toward and has a sharp curve tunnel portion 1a with a sharp bend in the middle. A rail 4 is laid on the bottom surface of the tunnel 1 including the shafts 2 and 3 in parallel with or after the excavation of the tunnel 1 over the entire length of the tunnel 1.

Next, in the starting shaft 2, an electric traveling start vehicle 6 having a pressing device 5 on the front side of the rail 4 is provided.
(See FIG. 3 and FIG. 4) is installed, and the rear end of the cable protection tube unit loading carriage 7 is connected to the front side of the pressing device 5. The cable protection tube 8 has a constant length and diameter, and at the rear end thereof, the base end portion of the socket body 9 that widens toward the front end is provided with a constant thickness spacer ring 10 as shown in FIG. The socket 9 is provided with a packing 9a on its inner peripheral surface.

As shown in FIGS. 3 and 4, a plurality of the cable protection tubes 8 are arranged side by side on the carriage 7 via tube pillows 11 and a predetermined number of them are stacked and stacked on top of each other to protect the cables. A pipe unit A is provided, and both sides of the rear portion of the unit A are supported by stays 12 provided upright on both side edges of the carriage 7. The rear end of the cable protection tube unit loading carriage 7 is detachably connected to the front end of the carriage 5a of the pressing device 5 by a connecting bar 13.

As shown in FIGS. 3 and 4, the pressing device 5 is provided with a pressing jack 14 on a fixed frame 5b which is erected on the carriage 5a.
And is fixed to the central portion of the cross arm 15 extending vertically and horizontally as shown in FIG. 5, and its rod end is pivotally attached to the fixed frame 5b.
Further, the rear center of the pressing plate 16 formed to have a shape capable of pressing the rear end of the cable protection tube unit A is supported on the center of the front surface of the cross arm 15 via the universal joint 17 in the vertical and horizontal directions. It is connected so that it can tilt in the direction ,
Pushing direction correcting jacks 18 are attached to the upper, lower, left and right arm ends of the cross arm 15, and rod ends of these jacks 18 are pivotally connected and connected to the upper and lower portions and both side portions of the pushing plate 16, respectively. Further, as shown in FIG. 6, a cushioning material 19 made of a rubber plate is attached to the front surface of the pressing plate 16. In addition, this cushioning material
A small-diameter hole 20 for confirming the connection state between the pipes which penetrates the pressing plate 16 from 19 and communicates with the respective cable protection pipes 8 of the unit A on the same axis is formed.

Reference numeral 21 denotes a rail clamp for fixing the pressing device 5 to the rail 4, which is provided on both sides of the front end of the carriage 5a. Together are connected together by the pressing device 5 of the rear end of the carriage 5a is front end to the connecting bar 22 of the activation wheel 6,
The reaction force adjusting jacks 23 are mounted on both sides of the lower end of the rear surface of the frame 5b of the pressing device 5, and the rod of the jack 23 is extended, and the contact plate 24 attached to the rod end is brought into contact with the front surface of the starting vehicle 6. It is made to accept. In addition, this jack
Instead of 23, a structure in which a screw rod is threaded through the frame 5b so as to be able to move forward and backward may be used.

From the start shaft 2 side, the starter wheel 6 equipped with the pressing device 5 thus constructed is driven to drive the cable protection tube unit loading carriage 7 connected to the front side of the starter shaft 2 via the connecting bar 13. While traveling on the rail 4 toward the reaching shaft 3, it is carried in to a predetermined position in the tunnel 1, the connecting bar 13 is separated at that position, and the truck 7 carrying the cable protection tube unit A is left while pushing. The starting vehicle 6 is retracted to the starting shaft 2 integrally with the device 5. The cable protection tube unit loading carriage 7 carried into the tunnel 1 is surrounded by a gable form 25 leaving the rear end thereof, and a filling material 26 such as mortar or concrete is filled in the gable form 25. The space between the inner wall surface of the tunnel 1 and the outer peripheral surface of each cable protection tube is filled by being driven through the injection hole 27 formed in the tunnel 1, and the carriage 7 for loading the cable protection tube unit is buried in the tunnel 1.

Next, the starting vehicle 6 returned to the starting shaft 2 side.
The pressing device 5 the front end, the same way by connecting the bogie 7 loaded with cable protection tube unit A, by running the activation wheel 6 carries the unit loading carriage 7 in the tunnel 1, the cable is transferred into the previously When it reaches the position near the rear end of the protection tube unit loading carriage 7, it is stopped. At this stop position, the rail clamp 21 holds the rail 4 to fix the pressing device 5 on the rail 4, and the reaction force adjustment jack 23 is extended to bring the contact plate 24 into contact with the front surface of the starter vehicle 6. , The reaction force is received by the starting vehicle 6, and the connecting bar 13 is released.

In this state, when the pressing jack 14 is operated to move the pressing plate 16 forward, the cushioning material 19 attached to the front surface of the pressing plate 16 is mounted on the carriage 7 connected to the pressing device 5. After contacting the rear end surface of the cable protection tube unit A of
The cable protection tube unit A is pushed forward together with the trolley 7, and the tips of the respective cable protection tubes 8 are protected by the previously arranged cables.
The opposing cable protection tubes 8 of the tube unit A are fitted into the rear end socket bodies 9.

[0017] Thus, the cable retention following the rear end of each cable protection pipes 8 of the preceding cable protection tube unit <br/> preparative A
The front ends of the respective cable protection tubes 8 of the protection tube unit A are fitted all at once to connect and connect these front and rear cable protection tubes 8 and 8, and then the starter wheel 6 and the starter shaft 2 together with the pressing device 5 are connected.
While retreating until the rear end of the connected cable protection tube 8 is provided with a gable form 25 at the rear end thereof in the same manner as described above, and the rear end of the cable protection pipe is projected rearward from the gable form 25, the filling material. 26
It is buried by filling.

The starting vehicle 6 retracted to the side of the reaching shaft 2 is again connected to the front side of the pressing device 5 in the same manner as described above by connecting one cable protection tube unit loading vehicle 7 to the tunnel 1
The front end of the cable protection tube 8 is inserted into and connected to the rear end socket body 9 of the cable protection tube 8 which has been carried in and is buried in the opposite side by the same operation as described above. Cave Thus, activation wheel 6 is reciprocally tunnel 1 from the starting pit 2 side
This is a work for sequentially connecting the protection tube unit loading carts 7 to one in the tunnel 1. However, even when the cable protection tube unit loading cart 7 is buried in the curved tunnel portion 1a, the above operation is performed. It can be done reliably.

That is, the cable protection tube unit loading carriage 7 is carried into the curved tunnel portion 1a by the starter vehicle 6, and after reaching the rear end of the previously arranged cable protection tube unit loading carriage 7 or reaching the proximity position. Release the connecting bar 13 ,
Grasp the rail 4 by the rail clamp 21 and press the pressing device 5
Together is fixed on rail 4 is catch on the front of the boot wheel 6 the pressing device 5 via the reaction force adjusting jack 23, the pressing plate 16 through the cross arm 15 actuates the pressing jack 14 in this state While moving forward, the pressing plate for pressing direction correction 18 arranged on all sides of the cross arm 15 is operated to press the pressing plate.
16 is pressed so that the bending direction of the curved tunnel, that is, the cross-sectional direction of the central portion of the cable protection tube unit A on the carriage 7 is directed to the normal direction R of the rail 4.

Therefore, the pressing plate 16 is connected to the cable protection tube unit.
Abut on the rear end surface of the contact A with a uniform pressing force,
As shown in FIGS. 8 and 9, due to the pressing force from the pressing plate 16, the insertion depth of the cable protection tubes 8, 8 mounted inside the curved rail 4 through the socket body 9 is
The cable protection pipes 8 mounted on the outside are fitted deeper than the insertion depth of the cable protection pipes 8 via the socket bodies 9, and the cable protection pipe unit A has a polygonal shape on the arc curve of the curved tunnel portion 1a. Are sequentially arranged. In this way, a series of cable protection tube unit rows buried with the filler 26 over the entire length of the tunnel including the curved tunnel portion 1a is piped.

In the above embodiment, one cable protection tube unit A is carried into the tunnel 1 and
It was filled with a filler 26 such as concrete for each coupling to the cable protective tube unit body A was carried earlier, several cases
Bull protection tube unit A is loaded and connected every
The cable protection tube units A may be collectively buried in the tunnel 1 with the filling material 26, or the cable protection tube unit row connected in series over the entire length of the tunnel 1 between the starting shaft 2 and the reaching shaft 3. After arranging, the filler 26 may be filled in the tunnel 1. Further, the cable protection pipe unit A was sequentially loaded and connected into the tunnel 1 in one direction from the starting shaft 2 side to the reaching shaft 3 side. The cable protection tube unit A may be sequentially loaded and connected into the tunnel 1 by the starter vehicle 6 provided with 5. In this way, the cable protection tube unit A is loaded and connected from the compatible wells 2 and 3 side. If work is performed, more efficient piping work will be possible.

[0022]

As described above, according to the cable protection pipe piping method of the present invention, the starting vehicle equipped with the pressing device having the pressing plate is reciprocally moved between the shaft and the tunnel. Each time, the carriage with the cable protection tube unit connected to the front side of the starting vehicle is carried into the tunnel, and is connected to the rear end of the cable protection tube unit on the carriage that has been carried to the predetermined position in the tunnel first. Since the work is repeated, the pressing force from the starting vehicle side by the pressing plate of the pressing device is directly
Contact, opposing cable protection tube between the front and rear cable protection tube unit with a relatively small pressing force without it being affected by the length of tons <br/> panel and be to transmit to the junction between the two units connection can be surely perform, moreover, without fear of damaging the end faces of the cable protection tube because the pressing force is only a small, cable on the dolly that is carried by the boot wheel
A table in which the bull protection tube unit is loaded into the tunnel first.
Sequentially and efficiently connect to the cable protection tube unit on the car.
The unit pipeline connected in series over the entire length of the tunnel
Can be formed.

Further, in the bent tunnel portion, when the next cable protection tube unit is pressed against the rear end of the previously carried in cable protection tube unit from the starting vehicle side , the above-mentioned pressing is performed.
The pressure plate of the device is tilted in the bending direction of the curved tunnel.
End of the cable protection tube unit by the pressing plate
Since the surface is pressed, the pressing force is applied to the cable protection tube unit.
The cable protection tube unit is fitted so that the fitting depths of the upper and lower side cable protection tubes and the left and right side cable protection tubes differ depending on the degree of tunnel bending. Therefore, it is possible to connect the cable protection pipes while absorbing the difference in circumferential length. Therefore, the cable protection tubes can be connected and communicated in series with high accuracy. Moreover, at the time of connection, as described above, the pipes can be connected with a relatively small pressing force, so that the carriage does not derail from the rail or fall, and the connection work is surely performed. It is possible .

[Brief description of the drawings]

FIG. 1 is a plan view of a tunnel provided between shafts,

FIG. 2 is a simplified longitudinal side view thereof,

FIG. 3 is a side view showing a state in which a carriage loaded with a cable protection tube unit is carried into a tunnel;

FIG. 4 is a plan view thereof,

FIG. 5 is a side view showing a cross section of a part of the pressing device;

FIG. 6 is a front view thereof,

FIG. 7 is a cross-sectional view of the rear end of the cable protection tube.

FIG. 8 is a simplified plan view showing a connection state between tubes at a curved bent portion;

FIG. 9 is an enlarged vertical sectional side view thereof.

[Explanation of symbols]

1 tunnel 2 starting shaft 4 rail 5 pushing device 6 starting vehicle 7 cable protection tube unit loading dolly 8 cable protection tube 9 socket body 14 pressing jack 16 pressing plate 18 pressing direction correcting jack 21 clamp 26 filling material A cable protecting tube unit

Front page continuation (72) Inventor Kazuo Yokota, 3-3-22 Nakanoshima, Kita-ku, Osaka, Kansai Electric Power Co., Ltd. (72) Ryuji Miyafuji, 3-22, Nakanoshima, Kita-ku, Osaka City, Kansai Electric Power Co. (72) Inventor Shinya, 3-3-22 Nakanoshima, Kita-ku, Osaka City, Kansai Electric Power Co., Inc. (72) Inventor, Yoichi Sakuda 3--3-22 Nakanoshima, Kita-ku, Osaka City, Kansai Electric Power Co., Inc. Teruo Kawasaki 3-22-22 Nakanoshima, Kita-ku, Osaka City, Kansai Electric Power Co., Inc. (72) Inventor Hiromi Ishii 2-2, Matsuzaki-cho, Abeno-ku, Osaka City, Okumura Gumi Co., Ltd. (72) Shigeki Ohashi, Osaka 2-2, Matsuzaki-cho, Abeno-ku, Osaka City Okumura-gumi Co., Ltd. (72) Masayuki Yoshioka 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura-gumi Co., Ltd. (72) Inventor Atsushi Takubo Matsuzaki, Abeno-ku, Osaka-shi 2-2, Machi Okumura Gumi Co., Ltd. (72) Inventor Fukuya Riho Osaka City Nishi Kitahorie 1-12-19 Kurimoto Iron Works Co., Ltd. (72) Inventor Koichiro Katayose 1-12-19 Kitahorie Nishi-ku, Osaka City Incorporated Kurimoto Iron Works Co., Ltd. (56) Reference JP-A 63-206532 JP, A) JP 4-125382 (JP, A) JP 63-255424 (JP, A) Actual development 5-74121 (JP, U) JP-B 2-52153 (JP, B2)

Claims (1)

(57) [Claims] [Claim 1 wherein said by stacking a plurality of fixed-length cable protection tube cable protection tube unit formed by laminating arranged on carriage
Equipped with a pressing plate that presses the rear end surface of the cable protection tube unit
Using the above-mentioned pushing device, a starter vehicle can be used to load the tunnel from the vertical shaft to the specified position in the tunnel first on the track laid in the tunnel.
To the position where it reaches the cable protection tube unit on the truck
After being transported, the cable is pushed by the pushing plate of the pushing device.
By pressing the rear end surface of the protection tube unit, the cable protection tube unit
The front end of the knit is loaded to the specified position on the rail first.
Fitting the rear end of the protective tube which faces the cable protection tube unit on said carriage, ligated, then with the pressing device activation
The vehicle and the vehicle are retracted to the vertical shaft side, and the starter vehicle again presses the cable protection tube unit loaded on the new carriage on the above-mentioned basis.
After being transported into the tunnel through the device, the pressing device
The pressing plate is used to fit and connect the front end of the cable protection tube unit to the rear end of the preceding cable protection tube unit that is placed in the tunnel, and this operation is repeated to form a series of cable protection tube units in the tunnel. How to arrange
In the curved tunnel section, the cable protection tube unit
When connecting them together, press the pressing plate of the pressing device
The pressure plate is tilted in the bending direction of the tunnel.
The cable protection tube unit by pressing the rear end surface of the cable protection tube unit.
The front end of the protective tube unit to the existing cable protective tube unit.
A method for piping a cable protection tube, characterized in that the cable protection tube is fitted and connected to the rear end of the cable.