JPH0145306Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a radioactive shelter, and more specifically, to an improved nuclear shelter that prevents it from floating up due to groundwater or earth pressure.

``Conventional example'' When radioactive fallout suddenly increases due to a nuclear test or an accident at a nuclear power plant, it is necessary to minimize the amount of radiation that the human body receives. For this purpose, radioactive siertas are set up underground where people can live for several months.

The conventional method for installing a radioactive shelter underground is to first dig a hole in the ground, build a formwork inside the hole, and then pour concrete in the same way as when constructing a normal basement. There is. In addition, parts such as floors, walls, and ceilings are made in advance in a factory, and those parts are assembled in a hole dug in the ground, or they are assembled on the ground near the hole and then moved using a crane. There is also a prefabricated method that involves lowering it into a hole. Furthermore, a unit method may be considered in which the floor, walls, ceiling, etc. are all assembled in a factory, transported to the installation location, and lowered into a hole dug there.

``The problem that the idea aims to solve'' However, the first method requires a lot of work at the installation site, and the construction period often takes longer than expected due to underground water seepage, unfavorable climate, etc. As a result, construction costs may be higher than planned and completion may be delayed.

In the case of a prefabricated type or a unit type, such drawbacks can be alleviated or eliminated. However, in these cases, they are usually made relatively lightweight due to the installation work and transportation to the installation location. As a result, a new drawback arose: radiation siertas were buried underground and then gradually lifted to the surface by gaining buoyancy due to earth pressure and groundwater.

This idea was devised under these circumstances, and its purpose was to reduce the flotation caused by earth pressure and groundwater in relatively lightweight radioactive shelters, not limited to prefabricated or unit type ones. The goal is to prevent it.

``Means for solving the problem'' In order to achieve the above-mentioned purpose, this invention fixes the main body of the radioactive shelter to a solid foundation with a larger planar area, and installs the main body along the outside of the side wall of the main body. A technical measure was taken to install a weight block on the top surface of the above-mentioned solid foundation to prevent floating.

With this configuration, the buoyant force acting on the main body and the solid foundation is offset by the weight of the weight block, and the radioactivity shelterer is prevented from floating.

"Example" This invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of this invention, with FIG. 1 being a longitudinal sectional side view and FIG. 2 being a longitudinal sectional view taken along the line - in FIG. 1. The main body 2 of this radiation shelter is placed on a solid base 3 having a larger planar area. This main body 2 and solid foundation 3
It is connected to via anchor bolts etc. Front and rear and left and right horizontal walls 21, 22, 23 of the main body 2,
On the upper surface of the solid foundation 3 along the outside of the block 24, weight blocks 4 for preventing floating are stacked in three layers, one above the other.

The weight blocks 4 are made of concrete and each has a hollow portion inside. This hollow portion is filled with a heavy filler 5 such as gravel, stones, gravel, and sand. The top surface of the topmost weight block 4 is covered with a lid 6 if necessary. Further, the weight blocks 4 and the lid 6 are provided with water holes (not shown) that communicate the inside and outside of the weight blocks 4. Therefore, the weight of the heavy block 4 can be reduced by providing a hollow part, but the weight of the heavy filler 5 such as gravel packed therein and the weight of groundwater coming in from the water hole This will compensate for the reduced weight.

Incidentally, inside the main body 2, there are provided a living room 7, an entrance/exit room 8, a passage 9 for communicating these two rooms 7, 8, and a machine room 10. Furthermore, a kitchen (not shown) and a toilet (not shown) are provided on both sides of the passageway 9 (on both left and right sides in FIG. 2). Furthermore, the machine room 1
0 stores a power generation device 11, a ventilation fan device 12, a water supply and drainage device (not shown), and the like. code 1
3 is a hatch, 14 is an emergency hatch, 15 and 16 are ladders for each access, 17 is a ventilation pipe, 18 is a water tank, and 19 and 19 are internal partition doors.

"Effects" As explained above, according to this invention, the main body of the radioactive shelter is fixed to a solid foundation with a larger plane area, and the main body is prevented from floating on the top surface of the solid foundation along the outside of the side wall of the main body. Since a weight block is provided, the buoyant force acting on the main body and the solid foundation is offset by the weight of the weight block, thereby preventing the radiation shelter from floating. In other words, the main body or the members constituting it can be made lighter and easier to transport.

Of course, the present invention is not limited to the above-mentioned embodiment; for example, the weight block may be solid without any hollow parts. Moreover, the material is not limited to concrete, but various materials such as iron and steel can be considered.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of this invention, with Figure 1 being a longitudinal sectional side view and Figure 2 being the same as that shown in Figure 1.
It is a longitudinal cross-sectional view along a line. 2... Main body, 3... Solid foundation, 4... Weight block,
21, 22, 23, 24...side wall.

Claims (1)

[Scope of utility model registration request] A radiation shelter, characterized in that the main body of the radiation shelter is fixed to a solid foundation having a larger planar area, and a weight block for preventing floating is provided on the upper surface of the solid foundation along the outside of the side wall of the main body. .