JP2001073695A - Magnetic shield box culvert and its construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of processes for constructing a magnetic shield box culvert, shield a magnetism in the box culvert having, as a source, a railway, car, underground power cable, and others surely and effectively in the box culvert, and prevent the misoperation of precision electronic equipment of the peripheral installation, discoloration and swing on CRT monitor. SOLUTION: In this magnetic shield box culvert, a magnetic shield steel plate 2 forming an inside surface and an outside surface forming a magnetic shield box culvert is formed so that a basic panel 4 and a corner panel 5 of magnetic material are combined properly with each other, and a splice plate of magnetic material is attached to the connection part of each of the panels 2 and 4 so as to ride on both panels and connected to each other through connection means such as bolts and nuts, or the panels in the extension direction of the box culvert are positioned at a specified distance without connecting to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a reinforcing steel concrete.
The magnets originating from railways, automobiles and other vehicles, and underground power transmission lines, etc., traveling in a box cab made of steel or steel reinforced concrete structural material are reliably and effectively scattered in the box cab. -Magnetic shield box carb
And how to build it.

[0002]

2. Description of the Related Art Magnets generated from vehicles such as trains and automobiles running in tunnels made of reinforced concrete or steel-framed reinforced concrete, or underground power transmission lines, etc., generate ground and underground peripheral facilities. In order to prevent adverse effects on various precision electronic devices and CRT images, etc. used in the reinforced concrete, a concrete reinforced concrete constructing a tunnel is required.
The inner or outer peripheral side of the structure is lined with a magnetic shield material. (JP-A-10-176495
No.)

[0003]

The prior art is concerned with a reinforced concrete or a steel reinforced concrete constituting a tunnel.
It is necessary to provide a lining for the magnetic shield on the inner peripheral surface side or the outer peripheral surface side of the structural member, and it is necessary to add a lining step to the conventionally performed step, which causes a cost increase. Had become. Further, when lining is provided on the outer peripheral surface side, there are problems such as deterioration due to corrosion and the like and problems of repairing them.

[0004] The present invention reduces the number of steps for constructing a magnetically shielded box-bart and reduces the magnetism generated by a railway, automobile, underground transmission line or the like in the box-bart into a box-bart. The shield is effectively and effectively shielded within the facility, malfunctions of precision electronic equipment in surrounding facilities, color shift of CRT images,
It is an object to prevent shaking and the like.

[0005]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and performs measurement and simulation analysis relating to magnetism in advance to grasp the direction of the magnetic field, the magnitude of the magnetism, and the distribution of the magnetism. On the basis thereof, a magnetic shield steel sheet is disposed on the surface of a box-bart made of a reinforced concrete or a steel reinforced concrete structural material, and a plurality of magnetic shield steel sheets are provided. They may be used in superposition.

[0006] The concrete means is a bottom plate, a side wall and a top plate made of a reinforced concrete or a steel reinforced concrete provided with a space that allows a train, a car or the like to travel, or a facility such as an underground power transmission line. And a magnetic sheet provided on the surface
Magnetic shield box carbal made of shielded steel sheet
A magnetic shield steel sheet used for a flat part and a magnetic shield steel sheet used for a corner part.
Formed by a combination of shielded steel sheets,
The magnetic shield steel sheet is joined to the joint between the shielded steel sheets by joining an auxiliary plate made of the same material as the magnetic shield steel sheet so as to close the joint, and joining each magnetic shield steel sheet by a connecting means such as a bolt. It is characterized by the following. Further, in some cases, the magnetic shield steel plates are not joined to each other in the extending direction of the magnetic shield box vault, but are used in a state where a predetermined gap is provided.

When the magnetic shield steel sheet is used not only for shielding the magnetism in the box vault but also as a permanent mold, it is reinforced on one side of the magnetic shield steel sheet. It is characterized in that a magnetic shield steel plate provided with ribs is used.

If the groundwater level at the construction site is high, a water stopping coking groove is formed on the contact surface of the contact plate attached to the joint between the magnetic shield steel plates. Article 2
Filling the groove for water stopping coking with a coking material, joining the magnetic shield steel plates together so as to close the joint at the joint, and joining the magnetic shield steel plates by means of a bolt or the like. It is characterized by becoming.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The box vault according to the present invention is performed by on-site construction, and a magnetically shielded steel sheet is used as a magnetic shield depending on the condition of the ground on which the construction is performed or the construction means. Not only that, it is used as a permanent form during concrete casting, or as a waterproof steel plate depending on the surrounding groundwater level. Less than,
The present invention will be described based on an embodiment shown in the drawings.

[0010]

FIG. 1 is a cross-sectional view of a reinforced concrete box box 1 according to the present invention.
Alternatively, a space A for installing a facility such as an underground transmission line is formed.

A reinforcing bar concrete box cover 1 shown on the left side of the center line L is a reinforcing bar concrete box cover 1 in which magnetic shield steel plates are provided on both inner and outer surfaces. Reinforced concrete box cover 1 shown on the right side of L is a reinforced concrete box cover 1 in which a magnetically shielded steel plate is provided only on the inner surface, and is of a different type. 1 is shown.

A magnetic sheet provided on the inner side or the outer side;
A magnetic material or a directional magnetic material effective for shielding magnetism in a predetermined direction is used for the shielded steel plates 2 and 3.
The magnetic shield steel plate provided on the upper surface of the bottom slab and the top slab which forms the box box cover 1 is exposed in advance from the surface of the concrete, or is pre- or post-constructed.
The bolt holes 14 are formed at the same intervals as the buried bolts 15 provided at regular intervals on the heat sink, and after the concrete is hardened, the buried bolts 15 are inserted into the bolt holes 14 of the magnetic shield steel plate and joined. By doing
The gap between the magnetic shield plate and the magnetic shield steel plate is prevented, so that both can be integrated. The surface of the hardened concrete is rough, and the hardened concrete is hardened with a mortar or the like so that the pre-cast concrete and the magnetic shield steel sheet can be bonded in a tight contact state. After making the surface smooth, a magnetically shielded steel plate is mounted.

As described above, the magnetic shield steel plate provided on the upper surface of the bottom plate and the top plate is not used as a formwork for preventing the bleeding of the concrete, but is a post-installation work. Since the steel plate does not require strength, no reinforcing ribs are provided and a magnetic sheet consisting of a flat plate is not provided.
Steel plates are used.

FIG. 2 is a perspective view showing an inner surface side of a unit unit panel constituting a magnetic shield steel plate used when constructing the reinforced concrete box cage 1 of the present invention. It is formed in a predetermined shape in advance so that it can correspond to a place.

The unit panel is composed of a basic panel 4 made of a magnetically shielded steel plate used in a flat part and a core panel.
It is constituted by a corner panel 5 made of a magnetically shielded steel plate used in a corner portion.

A formwork is used for the construction of the side walls and the top slab constituting the reinforced concrete box cage 1. However, since the magnetic shield steel plate is used also as a permanent formwork, the concrete in the flat plate 7 is used. A basic panel 4 and a corner panel 5 in which reinforcing ribs 6 are provided vertically and horizontally on a surface to be cast are used.

An inner magnetic shield steel plate 2 provided on the inner surface of the reinforced concrete box box 1 and an outer magnetic shield steel plate 3 provided on the outer surface are formed in advance as a unit panel in a factory or the like. Therefore, at the construction site, each unit panel is appropriately selected and used, and the panels are joined together and assembled to form the inner magnetic shield steel plate 2 and the outer magnetic shield steel plate 3.

Further, a magnetic sheath used also as a mold is used.
Basic panel 4 and corner panel 5 made of steel sheet
Are provided at predetermined positions of the flat plate 7 with joining bolt holes for joining the panels. The reinforcing ribs 6 may be provided with holes at appropriate intervals for improving the circumference of the concrete.

Since the basic panel 4 and the corner panel 5 provided with the reinforcing ribs 6 are used as permanent forms,
The structure is such that it can sufficiently resist the casting pressure of the concrete, and at the same time, has a structure that enhances the adhesion to the concrete and stabilizes it. Further, the basic panel 4, the corner panel 5, the flat plate 7, and the contact plate 8 have Corrosion prevention treatment is performed in advance.

FIG. 3 shows a basic panel 4 used when constructing the reinforced concrete box cage 1 of the present invention, and is used for preventing magnetic leakage from joints between the basic panels 4. FIG. 3 is an exploded view of a magnetic shield steel plate and an attachment plate 8 made of the same material, and a cross-sectional view showing a state where the basic panel 4 is joined by the bolt 9 and the attachment plate 8. In the basic panel 4 and the attachment plate 8, joining bolt holes 12 for joining the basic panels at predetermined positions are provided.
13 are provided. Further, the basic panel 4 may be provided with a female screw for screwing the bolt 9 in advance.

As an embodiment, the formation of the inner magnetic shield steel plate 2 at the construction site will be described. The inner magnetic shield steel plate 2 is formed by appropriately selecting and assembling the basic panel 4 and the corner panel 5. At this time, a side plate of the same material as the magnetic shield steel plate is attached from the space A side so that the side end surfaces of the basic panel 4 abut against each other to close the joint portion. The bolt 9 is inserted through the bolt hole 13 formed in the base panel 4 and is further inserted into the bolt hole 12 formed in the basic panel 4 and tightened with a nut. And screwed together. A concrete is cast on the inner magnetic shield steel plate 2 assembled in this manner.

FIG. 4 shows an inner or outer magnetic shield steel plate 2 on the upper surface of the hardened concrete of the bottom plate or the top plate.
FIG. 3 shows a perspective view and a cross-sectional view in which a flat plate 7 forming 3 is provided. Unlike the basic panel 4, no reinforcing rib 6 is provided.

Embedded bolts 15 are provided at regular intervals on the upper surfaces of the bottom plate and the top plate. The flat plate 7 and the auxiliary plate 8 attached to these upper surfaces also correspond to the embedded bolts 15 at similar intervals. A bolt hole is provided in this manner.

Unlike a magnetic shield steel plate that also serves as a permanent formwork, the magnetic shield steel plate is attached after the hardening of the concrete, so that it is necessary to prevent a deviation from the preceding casting concrete, as described above. A buried bolt 15 for preventing slippage, which is buried in the concrete at a predetermined interval in advance or after construction, is inserted into a bolt hole 14 provided in the flat plates 7, and at the joint portion between the flat plates, the contact plate 8 is further increased from above. Are attached so as to straddle both of them, and the buried bolt 15 is inserted into a bolt hole 13 provided in the attachment plate 8 and tightened and fixed by a nut. The attachment plate 8 is not used in places other than where the flat plates are joined, and is directly tightened and fixed by a nut.

FIG. 5 shows that an attachment plate 8 made of the same material as the magnetic shield steel plate is attached to the joint between the unit unit panels forming the inner or outer magnetic shield steel plate to prevent leakage of magnetism. FIG. 3 is a cross-sectional view in which the unit unit panels are in contact with each other, and the unit unit panels are bonded to each other. The right-side cross-sectional view of the center line L is an embodiment in which the unit panels are connected by bolts and nuts. Further, the left side sectional view of the center line is another embodiment, in which a female screw hole is provided in advance in the unit unit panel, and a bolt 9 is screwed into the female screw hole from the upper surface of the attachment plate 8 to connect the unit unit panels to each other. Are joined.

When the underground water level at the site where the box cage is constructed is high, the magnetically shielded steel sheet may also serve as the water-stopping steel sheet, and is used for the joint between the unit unit panels forming the outer magnetically shielded steel sheet. Attached plate 8
One or two water stop coking grooves 10 are provided in advance on the abutment surface of the base member, and the coking material 11 is filled in the water stop coking grooves 10 so that the attachment plate 8 is unit unit. Prevents magnetic leakage from joints between panels and stops water. The coking material 11 is preferably a water-swellable material.

FIG. 6 shows a case where the four unit panel panels forming the outer magnetic shield steel plate are joined to each other at the joint where the magnetic shield steel plate is made of the same material as the magnetic shield steel plate to prevent magnetic leakage and to stop water. FIG. 4 is a plan view showing a portion where the contact plates 8 intersect, and an enlarged plan view showing a portion where the attachment plates 8 intersect.

The auxiliary plate 8 used for the outer magnetic shield steel plate also serving as the water-stopping steel plate is disposed so that the water-stopping coking groove 10 is continuous vertically and horizontally to stop water. The coking material 11 is provided so as to be continuous with the water stopping coking groove 10.

Attached plate 8 provided vertically and horizontally for on-site construction
May cause the attached plate 8 to shift at the intersection,
As a result, the water stopping coking groove 10 may not be continuous vertically and horizontally, but a notch 16
Is provided, and by filling the caulking material 11 in the relevant portion, a continuous water stop portion can be formed.

Next, a method of constructing the magnetic shield box carbonate of the present invention will be described. First, a magnetic shield steel plate 2 to be disposed on the reinforced concrete box box 1 is planned.

The magnetically shielded steel plate 2 is usually provided on the inner surface of the bottom plate, the side wall and the top plate constituting the box cage, but is also provided on the outer surface if necessary. However, the distribution of magnetism originating from railways, automobiles, underground transmission lines, and the like is complicated, and it is not advisable to simply close them uniformly with a magnetically shielded steel plate.

Therefore, measurement and simulation analysis relating to magnetism are performed in advance to grasp the direction of the magnetic field, the magnitude of the magnetism, the distribution of the magnetism, and the like. Based on this measurement and simulation analysis, considering the position and installation environment standard values of electronic devices and the like, the direction of magnetic field, the magnitude of magnetism, the distribution of magnetism, etc. Determine the placement. In this case, a plurality of magnetically shielded steel sheets may be used one upon another. With respect to this arrangement plan, the shield effect is verified by simulation analysis, and a reasonable arrangement is determined, whereby the cost can be reduced.

In one embodiment, the magnetic shield steel plate 2 on the inner side is first assembled according to the above arrangement plan.
Assembling is performed by abutting the side edges of the basic panel 4 and the corner panel 5 constituting the inner magnetic shield steel plate, and applying the additional plate 8 from the front side to the mutual side edges. The bolts 9 are inserted into the bolt holes 12 provided in the above to fix them together.

Further, a reinforcing bar, a steel frame, or a structural material using both of them is assembled on the back surface side of the inner magnetic shield steel plate 2. This step may be a step before assembling the inner magnetic shield steel plate 2 or may be performed simultaneously with the assembling of the magnetic shield steel plate.

Thereafter, a mold on the outer side is assembled so as to surround the structural material. As a result of the above simulation, when it is determined that the magnetically shielded steel sheet is more effectively arranged on the inner or outer surface or the outer surface than on the inner surface only, for example, as a waterproof steel sheet, In the case where it is desired to expect the effect described above, the outer magnetic shield steel plate 3 similar to the above is used. If not necessary, a regular formwork is used. The construction after the arrangement plan of the magnetic shield steel plates has been described as one embodiment, but the construction procedure is changed at any time according to the situation of the construction site.

The outer magnetic shield steel plate 3 is provided with an inner magnetic shield steel plate.
Unit unit panel is appropriately selected in the same manner as
The side edges of the panels are butted against each other and joined by straddling the attachment plate 8 from the outside.

Thereafter, a concrete is cast between the inner magnetic shield steel plate 2 and the outer magnetic shield steel plate 3 or a normal mold. After the hardening of the concrete, the normal mold is removed, but in the case of the inner or outer magnetic shield steel plates 2, 3, it is left as a finished surface as it is.

The slab constituting the inner magnetic shield steel plate 2 is constructed by embedding bolts 15 provided at predetermined intervals on the surface of the hardened reinforced concrete slab, at predetermined intervals, and an inner magnetic shield. The magnetic steel plates are placed so that the bolt holes formed in the magnetic steel plates 2 are aligned with each other, the side edges of the adjacent magnetic shield steel plates are joined to each other, and the contact plate 8 is attached from above so as to straddle the side edges. Contact and join.

The magnetic shield steel plate used here is placed after hardening the concrete, so that no reinforcing rib is provided on the back surface side. The deviation from the preceding concrete is prevented by joining a buried bolt 15 buried in the concrete in advance or in post-processing with a bolt hole provided in the magnetic shield steel plate 2.

When the magnetically shielded steel plate 3 is placed on the outer surface of the top plate, it is not used as a mold for preventing the bleeding of the concrete, but after the hardening of the concrete, The external magnetic shield steel plate 3 is applied in the same manner as the floor slab.

Therefore, the gap between the preceding casting concrete and the magnetic shielding steel plate 3 is pierced at the same interval between the buried bolts 15 provided at predetermined intervals in the concrete in advance or in post-processing. It is performed by joining with the provided bolt holes.

In the above construction, the inner or outer magnetic shielded steel plate is assembled by connecting the unit unit panels made of the magnetically shielded steel plate at the site with bolts via the attachment plate 8 at the factory. For example, a large assembly may be performed in advance, and the work may be carried on site and installed. Alternatively, a reinforcing steel or the like as a structural material may be previously incorporated in a magnetically shielded steel plate at a factory or the like, and may be carried on site.

The magnetic shield steel sheet to be attached to the floor slab and the top slab has been described in the post-installation method in which the concrete is hardened, but the unit unit constituting the inner or outer magnetic shield steel sheet is described. By providing holes for eliminating concrete bleeding in advance at the required locations on the panel, magnetic shield steel plates on the bottom plate and top plate can also be constructed using magnetic shield steel plates that also serve as permanent forms. Is what you can do.

[0044]

The reinforced concrete or the reinforced concrete box box according to the present invention is provided with a magnetic shielded steel plate, a space for running a railway, an automobile or the like, or a facility such as an underground power transmission line. The magnets can be effectively shielded because they are provided on the inner side, which is the space side, or on the outer side if necessary. The shielding effect can be greatly improved.

In addition, by attaching an attachment plate made of the same material as the magnetic shield steel plate to the joint between the magnetic shield steel plates, it is possible to prevent leakage of magnetism from the joint, and It is possible to prevent malfunction of precision electronic equipment in a facility, color shift and shaking of CRT images, and the like.
Furthermore, if a magnetically shielded steel sheet having a directional property effective only in a certain direction of magnetism, such as a directional magnetic steel sheet, is used as the magnetically shielded steel sheet, the magnetic shielding can be efficiently performed, , Cost can be reduced.

In addition to the magnetic shield, the magnetic shield steel sheet can also serve as a formwork for concrete casting, and when used also as a formwork, the magnetic shield steel sheet may be used. Since the reinforcing ribs are provided on a flat plate forming the magnetic steel sheet with the reinforcing ribs facing the concrete side, a reinforcing material capable of resisting the driving pressure during concrete driving is provided. , And at the same time, the adhesion to the concrete can be enhanced.

The composite structure of the flat plate and the reinforcing rib is as follows.
Forming an SRC structure in cooperation with the main body structure, streamlining the design of the main body structure, reducing construction costs and shortening the construction period,
A wide range of effects can be expected, such as improved earthquake resistance.

Further, depending on the surrounding groundwater level,
The magnetic shield steel plate can also serve as a water stopping effect,
By providing a water stopping coking groove in the attachment plate and embedding the coking material in the groove in advance, the water stopping effect can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a box cage made of a reinforced concrete.

FIG. 2 is a perspective view of a unit panel of the magnetic shield steel plate.

FIG. 3 is an exploded view showing a basic panel and an attachment plate constituting a magnetic shield steel plate, and a cross-sectional view showing a state in which the base panel and the attachment plate are joined.

FIG. 4 is a perspective view and a sectional view showing a flat plate constituting a hardened concrete and a magnetic shield steel plate.

FIG. 5 is a cross-sectional view of an attachment plate at a joint portion of a unit panel forming a magnetic shield steel plate.

6A and 6B are a plan view showing a portion where the attachment plates intersect, and an enlarged plan view.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 box carlt 2 inner magnetic shield steel plate 3 outer magnetic shield steel plate 4 basic panel 5 corner panel 6 reinforcing rib 7 flat plate 8 auxiliary plate 9 bolt 10 water stop coking groove 11 core King material 12 Bolt hole 13 Bolt hole 14 Bolt hole 15 Buried bolt 16 Notch

Continuing on the front page (72) Inventor Jun Hirayama Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (72) Inventor Toshihiko Murata Kashima Ken 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (72) Inventor Shiro Kusanagi 1-7-2 Moto-Akasaka, Minato-ku, Tokyo Kashima Ken Incorporated (72) Inventor Hideaki Sudo 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima 2D055 BB03 EB01 GC09 KB03 KB08 LA02 5E321 AA44 BB53 CC22 GG05 GG07 GH07 GH10

Claims (10)

[Claims] 1. A magnetic shield box portal made of a reinforced concrete or a steel reinforced concrete structural material, wherein the inner panel or the outer panel has a mutual or corner panel constituting a magnetic shield steel sheet. Characterized in that a joining plate made of the same material as that of the panel is attached so as to straddle both sides from the surface side, and the panel and the attaching plate are joined by joining means. Shield box carat. 2. A magnetic shield box carte made of a reinforced concrete or a steel reinforced concrete structural material, wherein the basic panel constituting the inner or outer magnetic shield steel plate is mutually connected with the corner panel. In the joint portion of the above, the panels in the direction of extension of the box vault are not joined to each other, and a gap is provided at a constant interval, and the other joint portions are provided with an abutting plate made of the same material as the panel on both sides from the surface side. A magnetic shield box cover, which is attached so as to straddle and the panel and the attachment plate are joined by joining means. 3. The panel according to claim 1, wherein the basic panel and the corner panel are formed by a flat plate and reinforcing ribs provided on one surface of the flat plate in a vertical and horizontal direction. Magnetic shield box carbonate. 4. The water stopping coking groove is formed on one surface of the attachment plate, and a caulking material is filled in the water stopping coking groove. A magnetic shield box carbonate according to any one of claims 1 to 3. 5. The magnetic shield box cover according to claim 1, wherein the magnetic shield steel plate is a magnetic material. 6. The magnetic shield box cover according to claim 1, wherein the magnetic shield steel plate is subjected to a corrosion prevention treatment such as painting. 7. In order to grasp the direction of the magnetic field, the magnitude of the magnetic field, and the distribution of the magnetic field, a measurement and a simulation analysis relating to the magnetism are performed in advance, and the arrangement of the magnetic shield steel sheet is performed based on the measurement and the simulation analysis. In accordance with this arrangement plan, assembling the magnetic shielded steel sheet, further assembling the reinforcing bar or the structural member composed of the steel frame rebar along the magnetic shielded steel sheet, and then surrounding the structural material where necessary. A method of constructing a magnetic shield box cover by providing a mold, casting concrete, and removing the mold after curing of the concrete. 8. Assembling the magnetic shielded steel sheet is performed by abutting the side edges of the basic panels with each other or the corner panels.
8. The panel according to claim 7, wherein an attachment plate is attached to the front surface so as to straddle the side edge of each panel, and bolts are inserted into bolt holes provided in the attachment plate to join the panels. The described magnetic sheet
How to build a cold box carat. 9. A buried bolt is provided at predetermined intervals on a concrete surface constituting a floor slab, and a magnetic shield steel plate provided with bolt holes at the same interval as the buried bolt is placed on the upper surface of the concrete. 9. The method according to claim 7, wherein the buried bolt is inserted into a bolt hole of a magnetic shield steel plate and fastened with a nut. 10. A buried bolt is provided at regular intervals on a concrete surface forming a floor slab by post-processing, and a magnetic shield steel plate having bolt holes provided at the same interval as the buried bolt is provided on the upper surface of the concrete. 9. The magnetic shield according to claim 7, wherein the magnetic shield is mounted, and the buried bolt is inserted into a bolt hole of the magnetic shield steel plate and fastened with a nut.
How to build a cold box carat.