JPH11100802A - Magnetic shielding system of elevated railway - Google Patents

Abstract

(57) [Abstract] [Problem] To prevent the influence of a magnetic field generated by an electric current flowing from an overhead line on an underpass or an adjacent building in an elevated railway. SOLUTION: This is a magnetic shielding system of an elevated railway having a building or the like 11 under or around an elevated railway, wherein a magnetic shielding material is used for a soundproof wall of the elevated railway, a periphery of the viaduct leg 8 is covered with a magnetic shielding material 9, An iron plate 26 is laid on the frame slab 28 and is electrically connected to the down line 27, and the electromagnetic shielding members 12 and 14 are used for the ground line and the ceiling and the wall of the building 11. Keystone plate formwork, Secoform and deck are used for the electromagnetic shielding materials 12 and 14, and the ceiling part is made of iron or silicon steel sheet laid on a waterproof layer on the roof, or PC version with deck plate. A magnetic shielding material 12 such as is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic shielding system for an elevated railway having a building or the like below or around an elevated railway.

[0002]

2. Description of the Related Art As the traffic network of automobiles and trains has been developed and the traffic volume has increased, congestion on roads caused by railroad crossings has been reduced, and noise caused by noise has been reduced. In order to reduce the impact on the surrounding area and to make effective use of the land,
Or, the switching to the elevated system is increasing. In an elevated railway, the 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, trains other than the Shinkansen have a DC 1500
V is used, and the current flows through the overhead wire, and further flows from the overhead wire to the track (rail), viaduct legs, and the ground, and the effect of the magnetic field generated around the current by these currents becomes 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 the case of a computer or a personal computer, the screen of the CRT is distorted, disturbed, discolored, etc. I have.

[0004]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and to prevent the influence of a magnetic field generated by an electric current flowing from an overhead line on an underpass or a building around the overpass in an elevated railway. Things.

[0005] Therefore, the present invention is a magnetic shielding system for an elevated railway having a building or the like under or around an overpass, using a magnetic shielding material for a soundproof wall of the elevated railway, and covering the periphery of the viaduct leg with the magnetic shielding material. An iron plate is laid on an elevated structure slab and electrically connected to a down line to form a ground line, and an electromagnetic shielding material is used for a ceiling portion and a wall portion of the building.

[0006] The magnetic shielding material used for the building is a keystone plate used as a driving formwork, and the magnetic shielding material used for the ceiling is iron or silicon steel sheet laid on a rooftop waterproof layer, or a PC with a deck plate. It is characterized in that it is a plate.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a magnetic shielding system for an elevated railway according to the present invention.
9, 12, 14 are magnetic shielding materials, 2 is a soundproof wall, 3 is a rail and a floor slab, 4 is a train, 5 is an overhead wire, 6 is a reinforcing bar, 7 is a ground wire, 8 is a viaduct leg, 11 is a building, 13 is 2 shows a ground plate.

In FIG. 1, a magnetic shielding member 1 is provided on an elevated sound-insulating wall 2 so as to surround a train 4 running on rails and a floor slab 3 and an overhead wire 5 for magnetic shielding. , And the current flows through the rails and the floor slab 3. The magnetic shielding member 9 is a viaduct leg 8.
, For example, using a structural material (CFT) of the viaduct leg 8. Ground wire 7
Through the viaduct legs 8, it is electrically connected to the reinforcing steel bars 6 of the elevated slab,
A leakage current flows to the ground through the ground plate 13. The magnetic shielding material 12 is provided on the ceiling of the building 11 built under the overpass, for example, an iron or silicon steel plate laid on a waterproof layer on the roof, or a PC plate with a deck plate, a keystone plate of a steel driving formwork. It is. As the magnetic shielding member 14, besides a silicon steel plate, a keystone plate used as a steel driving form for beams, walls, and columns may be used. The keystone plate is made of a galvanized steel plate and is used as a steel driving form. For example, in the case of a pillar, two steel pillars formed of an L-shaped keystone plate are used. In the case of a beam, a steel driven beam formwork composed of a keystone plate on both sides and a bottom surface is used to form a steel driven beam formwork.

In the above configuration, the magnetic shielding members 1, 9,
Reference numerals 12 and 14 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 a ground wire. Of these, the magnetic shielding material 1
In order to shield the living space of the building 11 from the magnetic field generated by the electric current flowing from the building, the elevated soundproof wall 2 and the soundproof wall 2 are provided so as to surround them, and the magnetic shielding material 9 is
The living space of the building 11 is shielded from the magnetic field generated by the 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 the current flowing through the reinforcing bar 6 of the elevated slab, and the magnetic shielding member 14 flows to an adjacent (parallel running) overhead line or track. It shields the living space of the building 11 from the magnetic field generated by the electric current.

[0010] As is apparent from FIG.
The magnetic field generated by the current flowing through the rail and the floor slab 3 through the overhead wire 5 is generated around the overhead wire 5, that is, around the traveling direction of the train 4, while the ground wire 7
The magnetic field generated by the leakage current to the ground flowing through
Rather, it occurs around the ground wire 7 in the viaduct leg 8 perpendicular to the direction in which the overhead wire 5 extends. The magnetic field 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, the magnetic shielding members 1, 9, 1
2, the magnetic shielding can be realized without completely covering the entire elevated with the magnetic shielding material.

FIG. 2 is a diagram for explaining the effect of the magnetic shielding system for an elevated railway according to the present invention.
22 indicates a parallel running line.

When the building 11 is constructed under the elevated railway, if there is a main line 21 and a parallel running line 22 as shown in FIG.
For the building 11 under the elevated railway main line 21, the main line 2
Not only 1 but the parallel running line 22 is also a magnetic source. As described above, in an urban area, especially at a main station, a plurality of lines run side by side, and magnetism intrudes in a complicated manner. In other words, when there is a magnetic source on the side as shown in FIG. 2 as well as on the upper side as shown in FIG. 1, the magnetic shielding member 14 can concentrate the magnetism by the magnetic source on the side, The effect of magnetism can be effectively prevented even for complicated magnetic distribution.

Note that the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, in the above-described embodiment, the magnetic shielding material is 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 is applied to the floor slab or the like on 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.

[0014]

As is apparent from the above description, according to the present invention, each of the elevated soundproof walls, the viaduct legs, the ceiling of the building, and the surrounding walls are covered with a magnetic shielding material. An iron plate is laid on the slab and electrically connected to the down line and grounded, and furthermore, the reinforcing bar of the elevated slab is electrically connected to the ground wire, so that leakage current can flow to the ground through these circuits. It is possible to prevent a leakage current from flowing to the magnetic shielding material around the viaduct leg. Therefore, the magnetic field generated by the current flowing through 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, it is possible to realize magnetic shielding from an elevated railway to a building or the like using a space under or around the overpass, thereby preventing the influence of magnetism on the building or the like.

[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 for explaining the effect of the magnetic shielding system for an elevated railway according to the present invention.

[Explanation of symbols]

1, 9, 12, 14 ... 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 ... Ground plate

Claims (3)

[Claims] A magnetic shielding system for an elevated railway having a building or the like under or around an overpass, wherein a magnetic shielding material is used for a sound-insulating wall of the elevated railway, a periphery of the viaduct leg is covered with the magnetic shielding material, and an elevated structure slab is provided. A magnetic shielding system for an elevated railway, wherein an iron plate is laid on the building and electrically connected to a down line to form a ground line, and an electromagnetic shielding material is used for a ceiling portion and a wall portion of the building. 2. The magnetic shielding system according to claim 1, wherein the magnetic shielding material used for the building is a keystone plate used as a driving formwork. 3. The magnetic shielding material used for the ceiling of the building is an iron or silicon steel sheet laid on a waterproof layer on the roof, or a PC plate with a deck plate.
The magnetic shielding system of the elevated railway as described.