JP3588741B2 - Magnetic shielding system of elevated railway - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a magnetic shielding system of an elevated railway having a building or the like below or around an elevated railway.
[0002]
Problems to be solved by the prior art and the invention
As the traffic network of cars and trains develops and its traffic volume increases, trains reduce the traffic congestion on the roads due to railroad crossings, and reduce the impact of noise on the surroundings. In order to make effective use of the above, the use of the elevated system or the switching to the elevated system is increasing. In an elevated railway, an underpass can be used as a space for a station, a store or other buildings, a parking lot, a bicycle parking lot, or the like.
[0003]
Normally, electric trains other than the Shinkansen use a direct current of 1500 V, and the electric current flows through the overhead wire, and further flows from the overhead wire to the track (rail), viaduct legs, and the ground, and the magnetic field generated by these currents in the surroundings Is a problem. In particular, a considerably strong magnetic field is generated by the starting current flowing when the train starts and the regenerative current flowing immediately before stopping. Due to the influence of this magnetic field, in the case of an elevated railway, in a building or the like under the elevated or in the vicinity, for example, in a computer or a personal computer, the screen of the CRT may be distorted, disturbed, discolored, and other various problems may occur. I have.
[0004]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problem, and it is an object of the present invention to prevent the influence of a magnetic field generated by a current flowing from an overhead line on an underpass, a building around the overpass, and the like in an elevated railway.
[0005]
Therefore, the present invention relates to a magnetic shielding system of an elevated railway having a building or the like under an elevated or in the vicinity, using a magnetic shielding material for a soundproof wall of the elevated, and using a structural material of an elevated bridge leg as a magnetic shielding material. covering the periphery of the leg, by then placing the rail on the steel plate was laid iron plate on the elevated structure slab and electrically connected to lower line on the steel plate to the ground line, leakage from the rail The present invention is characterized in that a current bypass circuit is formed .
[0006]
Further, a magnetic shielding material is used for a ceiling portion of the building, and the magnetic shielding material used for the ceiling portion of the building is an iron or silicon steel plate laid on a waterproof layer on the roof, or a PC plate with a deck plate. It is characterized by the following.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing an embodiment of a magnetic shielding system of an elevated railway according to the present invention, wherein 1, 9, 12 are magnetic shielding materials, 2 is a soundproof wall, 3 is a rail and a floor slab, 4 is a train, Denotes an overhead wire, 6 denotes a reinforcing bar, 7 denotes a ground wire, 8 denotes a viaduct leg, 11 denotes a building, and 13 denotes a ground plate.
[0008]
In FIG. 1, a magnetic shielding member 1 is provided on an elevated soundproof wall 2 so as to surround a rail 4 and an overhead line 5 running on rails and a floor slab 3 for magnetic shielding. , And the current flows through the rail and the floor slab 3. The magnetic shielding material 9 is provided so as to cover the periphery of the viaduct leg 8, and uses, for example, a structural material (CFT) of the viaduct leg 8. The grounding wire 7 passes through the viaduct leg 8 and is electrically connected to the reinforcing bar 6 of the elevated slab, and flows a leakage current from the reinforcing bar 6 of the elevated slab to the ground through the ground wire 7 and the grounding plate 13. It is. The magnetic shielding member 12 is, for example, an iron or silicon steel plate or a PC plate with a deck plate provided on the rooftop waterproof layer provided on the ceiling of the building 11 built under the overpass.
[0009]
In the above configuration, the magnetic shielding members 1, 9, and 12 shield the living space of the building 11 from a magnetic field generated by a current flowing from the overhead line 5 to the rail and the floor slab 3 through the electric train 4 and a leakage current flowing to the ground through the ground wire. are doing. Among them, the magnetic shielding material 1 is provided as a soundproof wall together with an elevated soundproof wall 2 so as to surround the living space of the building 11 in order to shield the living space of the building 11 from a magnetic field generated by an electric current flowing from the overhead wire 5. The material 9 shields the living space of the building 11 from a magnetic field generated by a leakage current to the ground flowing through the ground wire 7 in the viaduct leg 8. The magnetic shielding member 12 shields the living space of the building 11 from a magnetic field generated by an electric current flowing through the reinforcing bar 6 of the elevated slab.
[0010]
As apparent from FIG. 1, a magnetic field {circle around (1)} generated by a current flowing from the overhead line 5 to the rail and the floor slab 3 through the electric train 4 is generated around the overhead line 5, that is, around the traveling direction of the electric train 4. On the other hand, the magnetic field {circle around (3)} generated by the leakage current to the ground flowing through the ground wire 7 is generated around the ground wire 7 in the viaduct leg 8 perpendicular to the extension direction of the overhead wire 5. . The magnetic field {circle around (2)} generated by the current flowing through the reinforcing bar 6 of the elevated slab is generated around the reinforcing bar 6 because the leakage current flows into the ground wire 7 in the viaduct leg 8. Therefore, although the directions of the respective magnetic fields are different, in the present invention, since the magnetic shielding members 1, 9, and 12 are provided in accordance with the magnetic field in that direction, it is not necessary to completely cover the entire elevated with the magnetic shielding members. Also, magnetic shielding can be realized.
[0011]
FIG. 2 is a view showing another embodiment of the magnetic shielding system of an elevated railway according to the present invention, wherein 21 is a rail, 22 is a sleeper, 23 is a filled concrete, 24 is a vibration isolator, 25 is a floating slab, 26 Indicates an iron plate, 27 indicates a downline, and 28 indicates an elevated slab.
In order to use the structural material (CFT) of the viaduct leg 8 as the magnetic shielding material 9 as described above, it is necessary to prevent current from flowing through the iron part of the CFT as the structural material. There is a case where the slab digs into the slab and makes electrical contact with the reinforcing bar 6. For this reason, as shown in FIG. 2, a low-resistance bypass circuit is formed by the iron plate 26 and the pull-down line 27. The iron plate 26 is laid on the elevated slab 28, and the rail 21, the sleepers 22, and the filled concrete 23 are arranged on the iron plate 26 together with the vibration isolator 24 and the floating slab 25. The pull-down wire 27 is a copper wire or an iron wire that is electrically connected to the iron plate 26 to flow a leakage current to the ground, and may be connected to the ground wire 7 shown in FIG. You may. Also, a circuit of the iron plate 26 and the down wire 27 may be provided together with the circuit of the rebar 6 and the ground wire 7 shown in FIG. Only one may be provided. By providing such a low-resistance bypass circuit, the leakage current flows from the rail 21 to the ground through the iron plate 26 and the pull-down line 27 constituting the low-resistance bypass circuit, and the CFT digs into the upper elevated slab, and Even when the CFT 6 is electrically contacted, the leakage current can be prevented from flowing through the CFT. Thus, the shielding effect of the iron portion of the magnetic CFT generated by the leakage current can be enhanced.
[0012]
Note that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above embodiment, the magnetic shielding material was laid on the waterproof layer on the roof of the building. However, when shielding the roof, the ceiling, or the lower floor, the magnetic shielding material was applied to the floor slab of the floor above. A shielding material may be used. Moreover, you may make it use a magnetic shielding material on the lower surface of an elevated slab as needed. Further, if considering that the iron plate only needs to be arranged on the elevated slab and that the leakage current flows to the ground through the down wire 27, the iron plate may include another plate-like body that can meet the demand. Needless to say.
[0013]
【The invention's effect】
As is clear from the above description, according to the present invention, each of the elevated soundproof wall, the surroundings of the viaduct legs, and the ceiling of the building are further covered with a magnetic shielding material, and an iron plate is laid on the elevated slab and lowered. Electrically connected to the grounding line, and furthermore, the reinforcement of the elevated slab is electrically connected to the grounding line, allowing leakage current to flow to the ground through these circuits, and the magnetic shielding material around the viaduct legs To prevent a leakage current from flowing. Therefore, the magnetic field generated by the current flowing in the elevated railway can be concentrated on the magnetic shielding material, and the space under the elevated and the surrounding area can be configured as a space with low magnetism. As a result, magnetic shielding can be realized from an elevated railway for a building or the like using a space under or around the overpass, and the influence of magnetism on the building or the like can be prevented.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a magnetic shielding system for an elevated railway according to the present invention.
FIG. 2 is a diagram showing another embodiment of the magnetic shielding system for an elevated railway according to the present invention.
[Explanation of symbols]
1, 9, 12 ... magnetic shielding material, 2 ... soundproof wall, 3 ... rail and floor slab, 4 ... train, 5 ... overhead wire, 6 ... rebar, 7 ... ground wire, 8 ... viaduct leg, 11 ... building, 13 ... Grounding plate, 21 rail, 22 sleeper, 23 filled concrete, 24 vibration isolator, 25 floating slab, 26 iron plate, 27 down wire, 28 elevated slab

Claims (3)

A magnetic shielding system of an elevated railway having a building or the like under or around an elevated railroad, using a magnetic shielding material for a soundproof wall of the elevated railway, and using a structural material of the elevated bridge leg as a magnetic shielding material to cover the periphery of the elevated bridge leg. By laying an iron plate on the elevated slab, arranging a rail on the iron plate and electrically connecting a pull-down line to the iron plate to form a ground line, a bypass circuit for leakage current from the rail is formed. elevated railway magnetic shielding system, characterized in that the. The magnetic shielding system according to claim 1, wherein a magnetic shielding material is used for a ceiling of the building. 3. The magnetic shielding system for an elevated railway according to claim 2, wherein the magnetic shielding material used for the ceiling of the building is iron or silicon steel plate laid on a waterproof layer on the roof or a PC plate with a deck plate.

Images