JPH1051922A - Method for laying cable protective tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently lay cable protective tubes in a tunnel over the full length of the tunnel by carrying cable protective tube carrying trucks in the tunnel from both shafts on both sides of the tunnel and successively connecting the tubes. SOLUTION: Trucks 7 carrying a plurality of cable protective tubes 8 are carried in a tunnel from both shafts 2 and 3 on both sides of the tunnel by means of starting vehicles 6 through pressing devices 5 and the tubes 8 are respectively connected to cable protective tubes 8 on a truck 7 which is already carried in the middle section of the tunnel by respectively inserting the corresponding end sections of the tubes 8 into both ends of the tubes 8 on the truck 7 by pushing the end sections with the pressing plates 16 of the pressing devices 5. Then, after the vehicles 6 are respectively moved backward to the shafts 2 and 3 sides together with the pressing devices 5, a truck 7 carrying the next cable protective tubes 8 is connected to the vehicles 6 through the pressing devices 5 and the end sections of the laid tubes 8 are connected to the corresponding end sections of the tubes 8 on the truck 7 carried in the tunnel in the same way. By repeating the above-mentioned operations, a series of cable protective tubes are laid in the tunnel over the full length of the tunnel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In recent years, the underground space tends to be overcrowded due to underground buried objects, and in some cases, it may not be possible to employ the open-cutting method for arranging cables for underground power transmission. Excavation tunnels for cable burial are being excavated deep underground by the pipe method, and long-distance tunnels are also adopted because it is difficult to secure shafts and reduce costs during tunnel excavation.

In order to arrange an underground power transmission cable in such a tunnel, a cable protection tube unit formed by stacking a plurality of fixed-length cable protection tubes is conventionally loaded on a truck. While the bogies are sequentially connected in series in the shaft, the rails are pushed from the shaft into the tunnel, and are arranged along the entire length of the tunnel. The tubing is achieved by mortar filling the space between the two.

[0004]

However, since the truck loaded with the cable protection tube unit connected in series from one shaft side to the other shaft side across the tunnel is pushed in one direction, the tunnel length is reduced. If it is long, it takes a long time to arrange it, the construction period will be prolonged and the construction cost will also rise, and a large pressing force will be required to push the whole, and the end face of the cable protection tube may be damaged However, there is a problem that the connection between the cable protection tubes cannot be reliably performed. 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.

[0005]

In order to achieve the above object, a method of piping a cable protection tube according to the present invention firstly loads a cable protection tube unit in which a plurality of fixed-length cable protection tubes are stacked and arranged. After loading at least one truck on the rail laid in the tunnel from the shaft to the intermediate position in the tunnel, the cable protection tube unit loading truck is connected to the next cable protection tube unit to be loaded. Is buried by filling the tunnel with a filler such as concrete. Thereafter, the carriage loaded with the cable protection tube unit is loaded from the both shafts side to the position of the existing cable protection tube unit buried with the filler by a starter equipped with a pressing device that runs on the rail, and is pressed. After the end portions of the respective cable protection tube units are fitted and connected to the opposite ends of the existing cable protection tube by the pressing plate of the device, the starting vehicle is retracted to the respective shaft side together with the pressing device.

Next, the starting vehicle again carries a new cable protection tube unit loading truck via the pressing device from the double shaft side to the opposite position of the cable protection tube unit loading truck which has been loaded earlier, and carries out the same as above. The opposite end of the cable protection tube unit is fitted and connected by the pressing plate of the pressing device, and this operation is repeated, and every time one or several cable protection tube units are disposed in the tunnel, the inner wall surface of the tunnel is removed. Filling a filler such as concrete into the space between the cable protection tube unit and the outer peripheral surface of the cable protection tube unit, leaving a connecting end with the cable protection tube unit to be carried in next, and disposing a series of cable protection tube units in the tunnel. It is to establish.

[0007]

[Action] A starting vehicle equipped with a pressing device is reciprocated between the respective shaft and the inside of the tunnel from both shafts across the tunnel, and the truck loaded with the cable protection tube unit connected to the pressing device is first placed in the middle of the tunnel. Since the work to connect to the end of the cable protection tube unit on the trolley that has been carried to the position is repeated, the work of arranging the cable protection tube unit in the tunnel can be performed efficiently and the construction period can be shortened. It is planned. In addition, the connection between the cable protection tube units is performed by pressing the opposite end of the cable protection tube unit to be disposed next to the end of the existing cable protection tube unit with the pressing plate of the pressing device on the starting vehicle side. Can be directly transmitted to the joint between the cable protection tube units, and the cable protection tubes can be connected with each other without damaging the end faces of the cable protection tubes with a relatively small pressing force regardless of the length of the tunnel. Connection becomes possible.

Further, each time one or several cable protection tube units are disposed in the tunnel, the cable protection tube unit to be carried in next into the space between the inner wall surface of the tunnel and the outer peripheral surface of the cable protection tube unit is connected. Since the filling material such as concrete is filled while leaving the connection end, the existing cable protection tube unit can be buried in parallel with the loading work of the cable protection tube unit loading cart from the side shaft. In addition, even if the cable protection tube unit to be connected to the existing cable protection tube unit is pressed, the cable protection tube unit buried in concrete is not affected by the pressing force and has a predetermined connection state. Can be maintained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a specific embodiment of the present invention will 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, this tunnel 1 is excavated from a starting shaft 2 to a reaching shaft 3 by a shield method, and a curved tunnel portion 1a having a sharp curvature is provided at an intermediate portion thereof. It is a distance tunnel. 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, an electric traveling starting vehicle 6 (shown in FIGS. 3 and 4) provided with a pressing device 5 is installed on the rail 4 in the shafts 2 and 3, and the pressing device 5 The cable protection tube unit loading cart 7 is connected. The cable protection tube 8 has a certain length and a certain diameter, and at one end thereof, as shown in FIG. 7, a base end portion of the socket body 9 expanded toward the front end through a spacer ring 10 of a certain thickness. A packing 9a is provided on the inner peripheral surface of the socket body 9.

As shown in FIGS. 3 and 4, a plurality of the cable protection tubes 8 are arranged side by side on the carriage 7 through a tube pillow 11 and a predetermined number of the cable protection tubes 8 are piled up. A protection tube unit A is provided, and both sides of the rear portion of the cable protection tube unit A are supported by stays 12 erected 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 connection bar 13.

In the pressing device 5, a pressing jack 14 is disposed on a fixed frame 5b erected on a truck 5a so as to be slidable back and forth, and the jack 14 is extended vertically and horizontally as shown in FIG. While being fixed to the center of the cross arm 15, the rod end thereof is pivotally attached to and supported by the fixed frame 5b, and the rear end of the cable protection tube unit A can be pressed against the front center of the cross arm 15. The center of the rear surface of the pressing plate 16 formed in a simple shape is connected via a universal joint 17 so as to be tiltable in the vertical and horizontal directions, and a pressing direction correcting jack 18 is connected to the upper, lower, left and right arm ends of the cross arm 15. The rod ends of these jacks 18 are pivotally connected to the upper and lower portions and both side portions of the pressing plate 16, respectively. The pressing plate 16
As shown in FIG. 6, a cushioning member 19 made of a rubber plate is
Is affixed. A small-diameter hole 20 for confirming the connection state of the pipes which penetrate from the cushioning material 19 through the pressing plate 16 and communicate with the respective cable protection pipes 8 of the cable protection pipe 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. The rear end of the truck 5a of the pressing device 5 is integrally connected to the front end of the starting vehicle 6 by a connecting bar 22.
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.

As shown in FIG. 1 and FIG. 2, the starting wheel 6 having the pressing device 5 thus constructed
The pressing device 5 is disposed on the rail 4 in the state in which the pressing device 5 is directed to the tunnel 1 side. First, the bogie on which the cable protection tube unit A is loaded on the pressing device 5 of one of the starting vehicles 6 Tunnel 1 by connecting 7 via connecting bar 13
The truck 7 carrying the cable protection tube unit A by separating the connecting bar 13 at that position,
Is left, the starting vehicle 6 is retracted to the original shaft 2 or the shaft 3 integrally with the pressing device 5. The carriage 7 loaded with the cable protection tube unit carried into the tunnel 1 is surrounded by the end form 25 except for both ends thereof, and as shown in FIG. Tunnel 1 by casting 26 through injection hole 27 drilled in wife formwork 25
Fill the space between the inner wall surface of each and the outer peripheral surface of each cable protection tube,
The cable protection tube unit loading cart 7 is buried in the tunnel 1.

Next, the pressing device 5 for the starting vehicle 6 that has returned to the one of the shafts 2 and the starting vehicle 6 that is disposed in the other shaft 3
And the carts 7 loaded with the cable protection tube units A1 and A1 in the same manner as described above, respectively, and these starting vehicles 6 and
6, the trucks 7 and 7 are loaded into the tunnel 1 and stopped when they reach both ends of the previously loaded truck 7. In this stop position, the rail clamp 21
The rails 4 are gripped by the
It is fixed upward and the reaction force adjusting jack 23 is extended to bring the contact plate 24 into contact with the front surface of the starting vehicle 6 to receive the reaction force by the starting vehicle 6 and release the connecting bar 13. In addition, it is possible to carry the cable protection tube unit loading cart 7 into the tunnel by the starting vehicle 6 from the side of the shafts 2 and 3 at the same time without carrying them in at the same time. It is sufficient to carry in the cable protection tube unit loading cart 7 by the starting car 6 from 2 and 3.

In this way, after a new cable protection tube unit A1 is carried in to a position facing the existing cable protection tube unit loading cart 7 carried in the middle part of the tunnel 1, it is provided in the pressing device 5 of the starting vehicle 6. Pressing jack 14
Is actuated to advance the pressing plate 16, when the cushioning material 19 attached to the pressing plate 16 abuts the opposite end surface of the cable protection tube unit A1 on the carriage 7, and then the cable protection tube unit A1 Is pushed together with the trolley 7, and the ends of the respective cable protection tubes 8 are simultaneously fitted into the opposite ends of the respective opposite cable protection tubes 8 of the existing cable protection tube unit A via the socket body 9.

In order to connect such a new cable protection tube unit A1 to the existing cable protection tube unit A, as described above, the cable protection tube units A1, A1 are connected from the two shafts 2, 3 sandwiching the tunnel 1 as described above. It is carried out after carrying in both ends of the existing cable protection tube unit A,
As shown in FIG. 8, when the connection work between the cable protection tube units A and A1 is completed, the starting vehicle 6 together with the pressing device 5 is retracted into each of the shafts, and connected to both ends of the existing cable protection tube unit A. In the same manner as described above, the cable protection tube units A1 and A1 are provided with the wife form 25, and the connecting material of the next cable protection tube unit is projected from the wife form 25 into the tunnel with the filler 26. Dolly 7 by filling
And buried in the tunnel.

Starting vehicles 6 and 6 retreated to the two shafts 2 and 3
Again, in the same manner as described above, one cable protection tube unit loading cart 7 is connected to the pressing device 5, carried into the tunnel 1, and attached to the end of the opposed cable protection tube 8 buried earlier. The opposite ends of the cable protection tube 8 are fitted and connected by the same operation. As described above, the starting vehicle 6 reciprocates in the tunnel 1 from the side shafts 2 and 3 and performs the operation of sequentially connecting the cable protection tube unit loading vehicles 7 to one vehicle in the tunnel 1. Even in the case where the cable protection tube unit loading cart 7 is buried in the tunnel section 1a, the above operation can surely be performed.

That is, after loading the cable protection tube unit loading cart 7 by the starting vehicle 6 to the curved tunnel section 1a, it is joined to or close to the rear end of the cable protection tube unit loading truck 7 disposed earlier. The connecting bar 13 is released, and the pressing device 5 is brought into contact with the front surface of the starting vehicle 6 via the reaction force adjusting jack 23. In this state, the pressing jack 14
Is operated to advance the pressing plate 16 via the cross arm 15, and the pressing direction correcting jacks 18 arranged on all sides of the cross arm 15 are operated to move the pressing plate 16 in the bending direction of the curved tunnel, that is, the bogie. The cable protection tube unit A1 is pressed so that the cross-sectional direction of the center portion of the cable protection tube unit 7 on the line 7 is directed to the normal direction R of the rail 4.

By this pressing, as shown in FIGS. 8 and 9, the fitting depth of the cable protection tubes 8, 8 loaded inside the curved rail 4 via the socket body 9 is reduced.
The cable protection tubes 8, 8 mounted on the outside are fitted deeper than the insertion depth through the socket body 9 between the cable protection tubes 8, 8, and the cable protection tube units A, A1 are curved tunnel portions 1a.
Are sequentially arranged in a polygonal shape on the circular arc curve. 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 loading truck is loaded into the tunnel 1 from each of the shafts 2 and 3 and both ends of the cable protection tube unit A previously loaded. Is filled with a filler 26 such as concrete each time it is connected to each other. However, every time a plurality of cable protection tube units are carried in and connected, the several cable protection tube units are collectively packed together with the cart 7 by the filler 26. It may be embedded in the tunnel 1.

[0022]

As described above, according to the cable protection pipe piping method of the present invention, the starting vehicle equipped with the pressing device is reciprocated between the respective shaft and the inside of the tunnel from both the shafts across the tunnel. Since the operation of connecting the truck loaded with the cable protection tube unit connected to the pressing device to the end of the cable protection tube unit on the truck that is first carried into the intermediate position in the tunnel is repeatedly performed, The work of arranging the cable protection tube unit can be performed easily and efficiently, and the construction period can be shortened. In addition, the connection between the cable protection tube units is performed by pressing the opposite end of the cable protection tube unit to be disposed next to the end of the existing cable protection tube unit with the pressing plate of the pressing device on the starting vehicle side. Can be directly transmitted to the joint between the cable protection tube units, and the cable protection tubes can be connected with each other without damaging the end faces of the cable protection tubes with a relatively small pressing force regardless of the length of the tunnel. Can be connected.

Further, each time one or several cable protection tube units are provided in the tunnel, the cable protection tube unit to be carried in next into the space between the inner wall surface of the tunnel and the outer peripheral surface of the cable protection tube unit. Since the filler material such as concrete is filled while leaving the connection end, the existing cable protection tube unit can be buried efficiently at the same time as the loading work of the cable protection tube loading cart from the side shaft. In addition, even if the cable protection tube unit to be connected to the existing cable protection tube unit is pressed,
A predetermined connection state can be reliably maintained without any influence on the pressing force of the cable protection tube unit embedded in concrete.

[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.

[Description of Signs] 1 Tunnel 2 Starting shaft 4 Rail 5 Pressing device 6 Starting vehicle 7 Cable protection tube unit loading cart 8 Cable protection tube 9 Socket body 14 Pressing jack 16 Pressing plate 18 Pressing direction correcting jack 21 Clamp 26 Filler A Cable Protection tube unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Eizo Takeuchi 3-3-22 Nakanoshima, Kita-ku, Osaka City Inside Kansai Electric Power Co., Inc. (72) Inventor Kazuo Yokota 3-2-2, Nakanoshima, Kita-ku, Osaka Kansai Inside Electric Power Company (72) Ryuji Miyato 3-3-22 Nakanoshima, Kita-ku, Osaka City Inside Kansai Electric Power Company (72) Manabu Shintaku 3-2-22-2 Nakanoshima, Kita-ku, Osaka Kansai Electric Power Inside (72) Inventor Yoichi Sakuta 3-3-22 Nakanoshima, Kita-ku, Osaka City Inside Kansai Electric Power Co., Inc. (72) Inventor Teruo Kawasaki 3-2-2, Nakanoshima, Kita-ku, Osaka Kansai Electric Power Co., Inc. (72) Inventor Hiroumi Ishii 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi Inside Okumura Gumi (72) Inventor Shigeki Ohashi 2-2-2, Matsuzaki-cho, Abeno-ku, Osaka-shi Co., Ltd. Okumura Guminai (72) Inventor Masayuki Yoshioka 2-2-2, Matsuzakicho, Abeno-ku, Osaka Co., Ltd.Okumura Gumi (72) Inventor Atsushi Takubo 2-2-2, Matsuzakicho, Abeno-ku, Osaka-shi Okumura Gumi (72) Inventor Toshiho Fukuya 1-12-19 Kitahorie, Nishi-ku, Osaka-shi Inside Kurimoto Iron Works, Ltd. (72) Inventor Koichiro Katayose 1-12-19 Kitahorie, Nishi-ku, Osaka-shi Kurimoto Iron Works, Ltd. Inside

Claims (1)

[Claims] At least one truck loaded with a cable protection tube unit formed by stacking a plurality of fixed-length cable protection tubes is carried from a vertical shaft onto a rail laid in a tunnel to an intermediate position in the tunnel. Thereafter, the cable protection tube unit loading cart is buried by filling the tunnel with a filler such as concrete, leaving an end for connection with the cable protection tube unit to be carried in next, and thereafter, on the both shafts side. From the starting material equipped with a pressing device that travels on the rail, the carriage loaded with the cable protection tube unit is transported to the position of the existing cable protection tube unit embedded with the filler, and each is driven by the pressing plate of the pressing device. After fitting and connecting the end of the cable protection tube unit to the opposite end of the existing cable protection tube, remove the starting vehicle together with the pressing device. Each of the shafts is retracted to the respective shaft side, and then the starting vehicle again carries a new cable protection tube unit loading truck via the pressing device from the both shafts to the position opposite to the cable protection tube unit loading truck respectively. It is carried in and fitted and connected to the end of the facing cable protection tube unit by the pressing plate of the pressing device as described above,
This operation is repeated, and each time one or several cable protection tube units are disposed in the tunnel, the cable protection tube unit to be carried in next to the space between the inner wall surface of the tunnel and the outer peripheral surface of the cable protection tube unit A method of piping a cable protection tube, characterized in that a filler such as concrete is filled while leaving a connecting end of the cable.