JPH10121777A - External shielding wall against radiation and construction thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the construction and make thin the concrete body wall and widen the floor area, by putting waterproof panels on an earth-retaining wall forming a part of an external shielding wall against radiation and placing concrete for the concrete body by setting it as a form used for a water way in common. SOLUTION: A continuous wall is constructed as an earth-retaining wall 10 for excavation of the underground and the construction of an external wall of a building. The thickness necessary for shielding from radioactive rays together with the concrete body wall 12 is provided for the earth-retaining wall 10. After the underground has been excavated, waterproof panels 11 like air cap sheets are attached on a necessary range of the surface of the earth- retaining wall 10 to use them as forms. Then, concrete is placed to form the concrete body wall 12. The underground water is cut off by the waterproof panels 11 and collected in a water way 13 formed by the earth-retaining wall 10 and the waterproof panels 11 and led to an underground water way 15 through water-collective ways 14. The water is collected in a spring water pit as managing drain water and treated while monitoring it. Since the earth-retaining wall 10 as a part of the external shielding wall against radiation and the waterproof panels 11 are used for forms and the water way 13, the construction work is simplified and the concrete body wall 12 can be made thin and the floor area can be widened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an outer wall of an underground building.

[0002]

2. Description of the Related Art Conventionally, radiation shielding outer walls 20 of underground buildings are known.
As shown in FIG. 2, the ground is reinforced with a mountain retaining pile 24,
Is built there. Yamadome pile 24 and radiation shielding outer wall 2
Between 0 and 0, backfill soil 25 is inserted.

[0003] Since groundwater is activated by radiation, groundwater permeating the radiation shielding outer wall 20 is collected as monitored wastewater, monitored, and treated.
Therefore, in order to collect groundwater permeating the radiation shielding outer wall 20, a drainage space 21 is formed inside the radiation shielding outer wall 20, and a drainage pipe 23 is formed through a drain pipe 22.
And store it in the spring pit with a pump.

[0004] With such a structure, the radiation shielding outer wall 20 adds the radiation shielding wall thickness (b) to the structurally necessary frame thickness (a) and the wall thickness (c) of the underground water leakage concealing wall 26. Then, the wall thickness (a + b +
c) is designed.

However, the conventional methods and structures have the following problems. <B> When the thickness of the underground outer wall is determined by radiation shielding, not only the structurally necessary walls, but also the walls necessary for shielding are built with reinforced concrete, resulting in a redundant structural frame. ing. <B> Drainage space 21 with double walls to collect groundwater
In order to construct a slab, a process such as assembling a double wall formwork is required. <C> When excavating the underground, the mountain retaining method is used, and after the underground structure is constructed, the mountain retaining pile is removed or remains as it is, and the mountain retaining pile is not effectively used.

[0006]

[Problems to be solved by the invention]

<A> The present invention is to easily construct a radiation shielding outer wall. <B> The present invention is to reduce the thickness of the radiation shielding outer wall. <C> The present invention is to eliminate the need for the double wall of the radiation shielding outer wall.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a radiation shielding outer wall for an underground building having a skeleton wall, a ridge wall constructed underground for ridges, and walls of the skeleton wall and the ridge wall. The total thickness shall be equal to or greater than the thickness of the wall that shields radiation, and it shall be provided between the skeleton wall and the retaining wall, and be provided with a waterproof plate having a headrace and a catchment connected to the end of the headrace. The radiation shielding outer wall, or the radiation shielding outer wall, wherein the waterproof plate is an uneven plate, wherein the convex surface of the waterproof plate is in contact with the retaining wall, the radiation shielding outer wall,
Or, in the radiation shielding outer wall, the waterproof plate is characterized in that it is a one-sided projection air cap sheet, the radiation shielding outer wall, or in the method of constructing a radiation shielding outer wall in an underground building, the underground continuous wall Build, excavate the ground on the construction side of the underground building of the underground continuous wall, place a waterproof plate with a headrace on the underground building side of the underground continuous wall, and set up a catchment at the end of the waterway. The radiation is characterized in that it is formed so that the waterproof plate is used as a formwork and the wall thickness of the skeleton wall is matched with the wall thickness of the underground continuous wall so as to be a wall thickness necessary for shielding radiation. The construction method of the shielding outer wall.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

<A> Outline of Radiation Shielding Outer Wall FIG. 1 shows a cross section of the radiation shielding outer wall of an underground building having a substance or device that generates radiation. The radiation shielding outer wall has a configuration in which a skeleton wall 12, a retaining wall 10, and a waterproof material 11 are disposed therebetween.

The thickness (A) of the skeleton wall 12 may be any thickness as long as it is more than the structurally necessary thickness of the underground structure.
The thickness (B) of 0 (A +
B) It is only necessary that the thickness be equal to or more than the thickness necessary to shield radiation.

<B> Mountain retaining wall The material for shielding radiation may be, for example, unreinforced concrete having a specific gravity of about 2.0.
After the construction of the underground structure, the continuous wall can be used as the retaining wall 10 as a part of the shield.

<C> Frame Wall The frame wall 12 needs to have a thickness to obtain the structural strength of the underground building, and is made of, for example, reinforced concrete. If necessary, groundwater can be prevented from entering the vicinity of the floors of the skeleton wall 12 and the retaining wall 10 with a waterproof rubber 17 or the like. Further, the water stoppage processing section 16 is provided near the ground surface at the boundary between the retaining wall 12 and the underground structure.

<D> Waterproofing plate The waterproofing plate 11 functions to block groundwater and to flow groundwater. Since groundwater is activated by radiation, water that has invaded the radiation shielding outer wall also flows to the underground waterway 15 via a drainage pipe 14 and other water collection channels, and is collected and monitored in a spring pit as management wastewater. Is processed.

For this purpose, the waterproof plate 11 has a water conduit 13 for flowing groundwater. The waterproof plate is an uneven plate or 1
A surface projection type air cap sheet or the like is used, and the gap serves as a water conduit, and water can flow through the gap.
As the uneven plate, for example, a PVC corrugated plate or a hollow plate with a slit can be used.

The groundwater that has penetrated the retaining wall 10 is blocked by the waterproof plate 11, and is guided into the water conduit 13 of the waterproof plate 11 without penetrating therethrough. The groundwater that has passed through the headrace enters the underground waterway via a water collection channel 14 formed by a drain pipe or the like, is pumped up, and is collected in a spring pit (not shown).

The method of constructing the radiation shielding underground outer wall will be described below.

<A> Construction of Retaining Wall A continuous wall is constructed as a retaining wall 10 for excavation of an underground and construction of an outdoor building wall. The thickness of the mountain retaining wall 10 is set so that the radiation shielding outer wall has a thickness necessary for shielding radiation as a whole.
The thickness to be added to the thickness of the skeleton wall 12 is determined.

<B> Attachment of waterproof plate After excavating the underground, a waterproof plate 11 such as an air cap sheet is attached to the surface of the continuous wall to a required range. Thereby, it is possible to block groundwater that intrudes from underground and to flow groundwater to the water conduit 13 of the waterproof plate 11 without constructing a double wall.

<C> Connection of water collecting channel A drain pipe forming the water collecting channel 14 is installed so as to be in contact with the waterproof plate 11. Thus, the groundwater flowing from the water channel 13 of the waterproof plate 11 can flow to the groundwater channel 15 via the water channel 14.

<D> Construction of skeleton wall Concrete walls of the skeleton wall 12 are cast using a continuous wall to which the waterproof plate 11 is attached as a formwork. This simplifies the construction of the formwork and the like, and allows the retaining wall 10 to be used as a shielding wall, and does not require a double wall.
And the floor area can be increased.

[0021]

According to the present invention, the following effects can be obtained. <B> Since the retaining wall is also used as the shielding wall, the frame wall can be made thin. <B> Since a waterproof material having a headrace is used instead of the double wall, the construction can be simplified and the floor area can be increased.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a radiation shielding outer wall of the present invention.

FIG. 2 is a cross-sectional view of a conventional radiation shielding outer wall.

Claims (4)

[Claims] 1. A radiation shielding outer wall of an underground building having a skeleton wall, wherein a total of a ridge wall constructed underground for the ridge and a wall thickness of the skeleton wall and the ridge wall shields radiation. A radiation shielding outer wall having a wall thickness or more and being provided between the skeleton wall and the retaining wall and having a waterproof plate having a headrace, and a water catchment connected to an end of the headrace. . 2. The radiation shielding outer wall according to claim 1, wherein the waterproof plate is an uneven plate, and a convex surface of the waterproof plate is in contact with the retaining wall. 3. The radiation shielding outer wall according to claim 1, wherein the waterproof plate is a one-sided projection type air cap sheet. 4. A method for constructing a radiation shielding outer wall in an underground building, comprising: constructing an underground continuous wall; excavating a ground on a construction side of the underground building of the underground continuous wall; A waterproof plate with a water channel is placed on the side surface, a water collecting channel is formed at the end of the water channel, the waterproof plate is used as a form, and the wall thickness of the skeleton wall is matched with the wall thickness of the continuous underground wall, radiation A method for constructing a radiation shielding outer wall, characterized in that the radiation shielding outer wall is constructed so as to have a wall thickness necessary for shielding the radiation.