JP3971942B2 - Tunnel cable protector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a trolley wire, signal, power, etc. arranged along the tunnel lining at the time of construction of the existing tunnel lining reinforcement method in which a plate-shaped segment made of steel plate is installed along the inner lining of the existing tunnel. The present invention relates to a tunnel cable protection device that protects existing cables such as cables.
[0002]
[Prior art]
In recent years, there have been collapsing accidents of lining concrete in railway tunnels and road tunnels, and various countermeasures for reinforcing existing tunnel lining have been proposed and implemented.
[0003]
The present applicants have developed and applied for a patent for a method of protecting a concrete lining inner surface by installing a steel plate segment on a tunnel lining inner surface. (For example, see Japanese Patent Application No. 2000-41315)
[0004]
In this method, a plate-shaped segment made of steel plate with a fitting joint formed at the end is assembled and installed on the inner lining of the existing tunnel, and the construction method is provided for a segment assembly carriage that runs in the tunnel. The segments are assembled with each other by gripping the segments with a rotating erector and rotating along the inner periphery of the lining.
[0005]
When this construction method is applied to an existing railway tunnel, it is necessary to perform construction in a state where a cable 2 such as a trolley wire or a signal cable is installed in the existing tunnel lining 1 as shown in FIG. And it is requested | required that these cables 2 should be constructed with erection without removing. Also, in-service tunnels can be constructed only for a few hours in the middle of the night without the train operation time, so rapid construction is required.
[0006]
Conventionally, when construction is performed in the vicinity of an aerial cable, in order to prevent an electric shock or an accident of cable disconnection, the cable is usually covered with a cylindrical cover 8 made of polyethylene or the like as shown in FIG. Protecting by enclosing 2 is performed. The cable cover 8 has a cut 10 formed in the longitudinal direction, and has a restoring property so that the cut 10 is closed. The cable cover 8 surrounds the cable 2 and is supported by the cable itself.
[0007]
[Problems to be solved by the invention]
When the conventional cable cover is used in the existing tunnel lining reinforcement method, there are the following problems.
[0008]
First, when installing a plate-like segment in the narrow gap between the lining inner surface and the existing cable along the inner lining surface of the existing tunnel, the plate-shaped segment touches the existing cable and damages the cable cover. There is a possibility to give. Secondly, since the conventional cable cover is supported by the cable itself, when the plate-shaped segment comes into contact with the existing cable, the cable cover and the cable are dragged together to break the cable. There was a risk that the cable suspension would fall.
[0009]
The present invention solves the above-mentioned conventional problem, and in the existing tunnel lining reinforcement method in which the cable is arranged in the tunnel, the plate-like segment can be installed quickly and safely without damaging the cable. It is an object of the present invention to provide an in-tunnel cable protection device.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the in-tunnel cable protection apparatus of the present invention has the following configuration.
[0011]
As shown in the figure, the present invention is an existing cable protection device used in an existing tunnel lining reinforcement method in which a plate-like segment 1b is installed along a lining inner surface 1a of an existing tunnel. One of the covers divided along the direction is fixed to the frame 3a of the segment assembling apparatus 3 via a support member 7a, and the cylindrical cable cover 8 surrounds the cable 2 by combining the one cover and the other cover. A pair or a plurality of pairs of guide rollers 6 attached to the frame 3a are spaced apart in the vicinity of the cable 2 in the circumferential direction, and the ends of the guide rollers 6 are the ends of the cable cover 8. The cable protection device is configured to protrude outward and can be moved to the tunnel center side in a state where the cable protection device is detached from the cable 2. To.
[0012]
[Action]
In the present invention, when installing the plate-like segment 1b along the lining inner surface 1a of the existing tunnel, one of the covers divided in the longitudinal direction is fixed to the frame 3a of the segment assembling apparatus 3, and the other of the covers is installed at the time of construction. A cylindrical cable cover 8 that surrounds the cable 2 is formed in a state in which the cover is combined and supported by the frame 3a, and a pair or a plurality of guide rollers attached to the frame 3a of the segment assembling apparatus 3 6 is spaced apart in the vicinity of the cable 2 in the circumferential direction, the roller end is guided by the guide roller 6 protruding outward from the end of the cable cover 8, and the segment 1b is fed along the lining inner surface 1a. As a result, the segment 1b is prevented from contacting the cable cover 8.
[0013]
That is, the cable 2 is surrounded by the cylindrical cable cover 8 so that the plate-like segment 1b does not directly contact the cable 2 when the segments are assembled. Even if the plate-like segment 1b contacts the cable cover 8, the cable cover 8 is supported by the frame 3a for safety.
[0014]
In addition, a guide roller 6 is disposed at a cable position in the vicinity of the tunnel circumferential direction of one or a plurality of pairs of cables, and the end of the guide roller 6 protrudes outward from the end of the cable cover 8. The segment 1b fed into the guide is guided by the guide roller 6 and guided to the gap with the inner surface of the lining, and does not contact the cable cover 8.
[0015]
The guide rollers 6 may be arranged at least one pair apart from the feeding side of the segment 1b in the vicinity of the tunnel circumferential direction of the cable 2, but two pairs are preferably arranged on both sides of the cable 2.
[0016]
Further, the cable protection device fixed to the frame 3a is movable toward the tunnel center side in a state where it is detached from the cable 2, so that the segment assembly device 3 does not become an obstacle to travel when moving.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 shows an embodiment of the present invention. In a railway tunnel in which two trolley wires (cables) are installed in the upper part of an existing tunnel and signals and power cables are installed on the side wall, the existing tunnel lining reinforcement method is used. It is the front view which showed the condition which has installed the segment along the lining inner surface.
[0019]
FIG. 2 is a longitudinal section of the existing tunnel of FIG. 1 and a side view of the segment assembling apparatus. FIG. 3 is a partially enlarged view of FIG. 1. FIG. 4 is a situation diagram in which segments are installed in a state where the trolley wires are protected by the two trolley wire protection devices arranged in the upper part of the existing tunnel. It is a cable protection apparatus of a side wall, and a segment installation situation figure.
[0020]
As shown in FIGS. 1 and 2, in the existing tunnel lining reinforcement method, the segment 1b is installed on the lining inner surface 1a using the segment assembling apparatus 3 that runs on the rail 1c. The segment assembling apparatus 3 includes a frame 3a serving as a main body, an erector 3b (a swivel expansion / contraction device) provided with a segment gripping portion at the tip, a main body fixing device 3c, a traveling wheel 3d, and the like. Further, the cable protection device according to the present invention of the side cable protection device 5 is attached to a portion facing the trolley wire 2 on the upper part of the frame 3a, and the side cable protection device 5 is attached to a location facing the cable 2 on the side portion. It has been.
[0021]
As shown in FIG. 3, the two trolley wires 2 arranged in the upper part of the tunnel are surrounded by a rectangular cylindrical cable cover 8. The cable cover 8 is vertically divided into two in the longitudinal direction, and the lower cover 8a is attached to the frame 3a of the segment assembling apparatus 3 (attached to the upper frame 3f of the lifting jack 3e provided on the frame 3a). A rectangular tubular cable cover 8 that surrounds the trolley wire 2 is formed by fitting and combining the upper cover 8b on both sides.
[0022]
The upper cable protection device 4 that protects the upper trolley wire 2 is attached to the frame 3a of the segment assembly device 3 (to the upper frame 3f of the lifting jack 3e provided on the frame 3a, as shown in the enlarged view of FIG. 2) Two pairs of guide rollers 6 that are attached via support members 7 and that are provided at intervals shorter than the segment width in the longitudinal direction of the tunnel are arranged on both sides in the tunnel circumferential direction of the trolley wire 2 positioned above the tunnel. Are arranged separately from each other.
[0023]
The guide roller 6 has an upper end protruding outward from the outer end surface of the cable cover 8. When the segment 1 b gripped by the erector 3 b is installed, the segment 1 b does not contact the cable cover 8 and The gap between the lining inner surface 1a can be moved and fed.
[0024]
As described above, the upper cable protection device 4 can be moved up and down by the lifting jack 3e.
[0025]
FIG. 4 shows details of the side cable protection device 5. In this cable protection device 5, a bracket 9 is fixed to the side surface of the frame 3 a of the segment assembly device 3. The bracket 9 is composed of a guide member 9b having a dovetail cross section with an open top surface and a horizontal member 9a slidably fitted to the guide member 9b. The horizontal member 9a includes two support members 7 and 7a. Is provided. A pair of guide rollers 6 attached to the support member 7 and spaced apart from the segment width in the longitudinal direction of the tunnel is disposed above the side cable 2.
[0026]
The side cable 2 is surrounded by a circular cylindrical cable cover 8. The cable cover 8 is vertically divided into two in the longitudinal direction, and a lower cover 8a is fixed to a horizontal member 9a slidably supported on the frame 3a via a support member 7a. The cable cover 8 is configured to form a cylindrical cable cover 8 that surrounds the cable 2 by fitting the upper cover 8b to the lower cover 8a on both sides.
[0027]
The guide roller 6 has an end surface facing the lining inner surface 1a protruding outward from the outer end surface of the cable cover 8, and the segment 1b contacts the cable cover 8 when the segment 1b gripped by the erector 3b is installed. It is possible to move the gap between the guide roller 6 and the lining inner surface 1a without feeding.
[0028]
The cable cover 8 should preferably be made of a high strength metal so that it will not be damaged even if the segment 1b comes into contact with it, but an insulating material such as plastic may be used to provide electrical insulation. . Moreover, you may make it use the metal cable cover 8 in the state which coat | covered the cable with the insulating material.
[0029]
The shape of the cable cover 8 may be a quadrangular shape, a circular shape, or any other shape, and a split cylindrical shape. Moreover, you may make it open and close as what is divided into 2 as the one-side hinge 12 as shown in FIG.4 (B).
[0030]
1 and 2, when the segment assembling device 3 is moved in the tunnel, the upper cable protection device 4 is a lifting member 3e of the frame 3a, and the side cable protection device 5 is a slidably attached horizontal member. 9a makes it possible to move to the tunnel center side with the cable 2 detached from the cable cover 8 and keep it within the vehicle limit.
[0031]
Next, the construction method of the segment installation in the existing tunnel lining reinforcement method using the cable protection apparatus of this invention is demonstrated.
[0032]
When the segment assembly device 3 reaches the work location, the device is fixed by a jack-type fixing device 3c.
[0033]
Next, the guide roller 6 and the cable cover 8 of the upper cable protection device 4 and the side cable protection device 5 are set in a positional relationship facing the trolley wire 2 and the side cable 2, respectively. When the metal cable cover 8 is used, an insulating coating material is wound around the trolley wire 2 in advance.
[0034]
Next, the cable protection devices 4 and 5 are set in a predetermined arrangement by the following means.
[0035]
In the upper cable protection device 4, the horizontal member 9 a is slid to the lining surface 1 a side by operating the lifting jack 3 e of the frame 3 a, and the upper surface (the lining surface side) of the guide roller 6 in each device. ) Is positioned at a predetermined segment 1b.
[0036]
Next, the upper cover 8b is assembled to the lower cover 8a of each divided cable cover 8, and the cable cover 8 is set so as to surround the trolley wire 2 and the side cable 2.
[0037]
Next, the segment 1b gripped by the erector 3b is circulated along the lining inner surface 1a, fed through the gap between the guide roller 6 and the lining inner surface 1a, and fitted and connected to the joint of the segment 1b arranged in advance. In the side cable protection device 5, when the segment 1b is fed, the guide roller 6 side (upward) is used.
[0038]
When the ring assembly at the work location is completed, the upper cover 8b of each cable cover 8 is removed, the lifting jack 3e and the horizontal member 9a are slid to move both cable protection devices 4 and 5 to the tunnel center side, and then the fixing device. The fixing of 3c is released, the segment assembling apparatus 3 is moved to the next work location, and the same work is repeated.
[0039]
When carrying out the present invention, the configuration described in the embodiment may be appropriately modified and implemented.
[0040]
【The invention's effect】
According to the cable protection device of the present invention, when installing plate-like segments for reinforcement along the inner surface of the lining in the lining reinforcement method for existing tunnels, one or more pairs attached to the frame of the segment assembly device By projecting the end face of the guide roller that is spaced apart in the vicinity of the tunnel circumferential direction of the pair of cables to the outside from the end of the cable cover, and guiding the guide roller along the inner surface of the lining The segment can be assembled while protecting the segment from coming into contact with the cable. Even if the segment contacts the cable cover, safety is ensured by the cylindrical cable cover fixed to the frame.
[0041]
Furthermore, since the cable protection device can be moved to the tunnel center side with the cable disconnected, the segment assembly device can move within the tunnel without any obstacles, and the workability of the existing tunnel lining reinforcement work is improved.
[Brief description of the drawings]
FIG. 1 is a front view showing a state in which segments are installed by an existing tunnel lining reinforcement method in a state where a cable protection device is set in an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the existing tunnel of FIG. 1 and a side view of the segment assembling apparatus.
FIG. 3 is a partially enlarged view of FIG. 1, and is an installation situation diagram of a protection device for two trolley wires arranged at an upper part in an existing tunnel.
4A is an installation state view of the cable protection device on the side wall, FIG. 4B is a detailed view of the cable cover of FIG. A, and FIG. 4C is a cable cover and a guide roller in the protection device of FIG. It is sectional drawing of a support part.
FIG. 5 is an internal perspective view of an existing railway tunnel.
FIG. 6 is a cross-sectional view of a conventional cable cover.
[Explanation of symbols]
1 Existing tunnel lining 1a Lining inner surface 1b Segment 1c Rail 2 Cable (trolley wire)
3 Segment assembly device 3a Frame 3b Elector 3c Fixing device 3d Traveling wheel 3e Lifting jack 4 Upper cable protection device 5 Side cable protection device 6 Guide roller 7 Support member 7a Cable cover support member 8 Cable cover 8a Lower cover 8b Upper cover 9 Bracket 9a Horizontal member 10 Notch 11 Guide member 12 Hinge

Claims (3)

An existing cable protection device used in the existing tunnel lining reinforcement method, in which a plate-like segment is installed along the inner surface of the existing tunnel lining, and the protection device has one of the covers divided along the longitudinal direction. A cylindrical cable cover that is fixed to the frame of the segment assembling apparatus and surrounds the cable by combining the one cover and the other cover, and is attached to the frame via a support material. A pair or a plurality of pairs of guide rollers are arranged apart from each other in the vicinity of the tunnel circumferential direction of the cable, and the guide roller end protrudes outward from the cable cover end, and the cable protection device is detached from the cable. In-tunnel cable protection device characterized in that it can be moved to the tunnel center side in a state. In order to allow the cable protection device to move away from the cable and move toward the center of the tunnel, the one cover and the guide roller are supported by expansion / contraction means that can move in and out of the tunnel provided in the frame of the segment assembly device. The in-tunnel cable protection apparatus according to claim 1, wherein: The in-tunnel cable protection device according to claim 1, wherein a plurality of the cable protection devices are provided at an angle in the circumferential direction of the tunnel.

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