JP2018100550A - Medical base-isolated building comprising radiation irradiating chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a medical base-isolated building comprising a radiation irradiating chamber.SOLUTION: There is provided a medical base-isolated building in which a radiation irradiating chamber is directly mounted on a building foundation, a base-isolated device is provided on the radiation irradiating chamber, and the parts of the building other than the radiation irradiating chamber are foundation base isolation.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a medical seismic isolation building having a radiation irradiation chamber.

There is a medical building provided with a medical facility (medical particle beam irradiation device) using radiation, such as a medical electronic linac. The shielding wall of the medical electronic linac room is the boundary of the radiation control area, and the influence of radiation on the general public must be less than the prescribed exposure dose limit outside this. It is 3m thick concrete, and an iron plate is inserted.
On the other hand, the isolation of hospitals is also being promoted.
When a medical building such as a hospital with a heavy radiation irradiation chamber such as a thick concrete wall is seismically isolated, the load distribution of each section is large, and the load borne by the seismic isolation device differs greatly. The burden on the device increases. Making the radiation room a separate building (see FIG. 5) requires a large site for the building and is not suitable for medical facilities provided in urban areas.

In Patent Document 1 (Japanese Patent No. 5227160), a wall shielding member such as a steel plate standing on the indoor side of a reinforced concrete wall structure housing and a radiation shielding material is structurally integrated with the upper portion of the wall structure housing. A ceiling shielding member that is laid on a reinforced concrete ceiling structure housing and shields radiation, and a wall of a radiation shielding structure in which a protrusion projecting indoors is formed at the upper end of the wall shielding member. A radiation chamber is disclosed.
Patent Document 2 (Japanese Patent Laid-Open No. 2014-129693) discloses a general base-isolated building (see FIG. 6) that can also be applied to a hospital.

Japanese Patent No. 5227160 JP 2014-129893 A

  An object of this invention is to propose a medical seismic isolation building provided with a radiation irradiation room.

1. In a medical building, the radiation irradiation room is directly attached to the building foundation, and a seismic isolation device is provided on the radiation irradiation room, and the building part other than the radiation irradiation room is basic seismic isolation. .
2. The foundation is a mat foundation formed in the underground part,
The radiation irradiation chamber is characterized in that a metal body for radiation shielding is arranged except for a portion in contact with the natural ground. The medical seismic isolation building described.
3. The radiation irradiation room has an earthquake-resistant structure. Or 2. The medical seismic isolation building described.
4). The floor slab directly above the seismic isolation device placed in the upper part of the radiation chamber is the same level as the floor slab of the base isolation building. ~ 3. A medical seismic isolation building as described in any of the above.

1. According to the present invention, a medical seismic isolation building provided with a radiation irradiation chamber can be realized.
Basically, it is seismic isolation on the basis of medical buildings such as hospitals, and the radiation irradiation room part equipped with medical facilities using radiation such as medical electronic linac is directly attached to the foundation, and the radiation irradiation room The part is a medical seismic isolation building having a radiation irradiation chamber in which a seismic isolation device is arranged above the radiation irradiation chamber.
Shielding walls (including floors) of radiation rooms need to be formed as radiation control area boundaries, and are constructed using very thick concrete walls and thick shielding iron plates, so the weight of the radiation room is very high The difference in the body weight per unit from that of other general wards is large, and by disposing the seismic isolation device above the radiation irradiation room, it is possible to reduce the weight distribution deviation of the building to be isolated. As a result, the load difference between the seismic isolation devices can be reduced, and an increase in the design, production, and installation burden of the seismic isolation devices and seismic isolation foundations can be suppressed.
Furthermore, since the radiation irradiation room is directly attached to the building foundation, the lower floor portion does not correspond to a section where people pass or stay, and the radiation shielding structure of the floor portion can be relaxed. For example, there is no need to use an iron plate. If the amount of iron plate used can be reduced, the weight of the radiation irradiation chamber can be reduced, the load on the foundation can be reduced, and the construction period can be shortened.
A medical building with a radiation irradiation room installed in the building and seismic isolation is suitable as a medical facility in urban areas where site restrictions are large.
2. By forming the foundation of the building in the underground part, the wall surface with relaxed radiation shielding structure can be extended to the wall part in contact with the natural ground. For example, by making the entire radiation irradiation room deeper than the ground surface and providing it on the side of the building, the radiation shielding structure that relaxes the side wall on the side in contact with the outer mountain on the floor to the condition that no person passes or stays be able to. By using the mat foundation, it is formed directly on the ground without any pits, so that the radiation shielding performance on the floor side can be sufficiently secured. The foundation for mats is also easy for building an earthquake-resistant foundation in the radiation room.
In basic seismic isolation, it is necessary to provide seismic isolation pits around the building, but it is not necessary to provide pits where the radiation chamber wall is in contact with the retaining wall (natural ground).
3. The radiation irradiation room itself will be seismic-proof, and the internal equipment will be seismically isolated if necessary to improve seismic resistance.
4). The floor slab on the upper floor of the radiation irradiation room and the floor slabs of other basic seismic isolation parts will be built to the same level, and a floor with no steps will be constructed. In medical buildings, there are many moving medical devices with casters, such as stretchers and carts, and there are no steps even for patients with walking disabilities or reduced strength, and for those requiring care. Become smooth.
5). For example, if the basement floor is set to the second floor or the third floor, radiation irradiation chambers are provided in the corners of the building, and the ground floor portion is set to the same level, the ground floor portion of the building can realize the same level of the same floor.
Furthermore, the building structure and management are rational by constructing the radiation irradiation chamber according to the span interval so as to match the building module.
And in the underground part, it is necessary to provide expansion connection by providing a separation part for seismic isolation between the general ward part and the radiation irradiation room. It is possible to realize a seismic isolation building for medical use with a radiation irradiation room with a good seismic isolation balance while preventing deterioration of convenience, such as designing with matching the level with the floor.

Example of medical base isolation building with base direct radiation irradiation room, irradiation room upper and base base isolation structure Example of radiation irradiation room formed in the basement of the building side An example in which the radiation room is placed close to the side of the building and no steel plate is inserted on the floor side or ground wall Example of radiation room Example of an irradiation room in a separate building Example of general base-isolated building

The present invention is a medical seismic isolation building in which a radiation irradiation room is directly attached to a building foundation, a seismic isolation device is provided on the radiation irradiation room, and a building part other than the radiation irradiation room is a base isolation.
Seismic isolation of medical buildings with medical facilities using radiation, such as linacs, where the radiation irradiation room is directly attached to the foundation of the building, and a seismic isolation device is installed on the radiation irradiation room. By using radiation shielding together with the foundation, the radiation irradiation facility is not a separate building, but an integrated medical seismic isolation building.
This is a medical seismic isolation building that can use the site effectively and is suitable as a hospital in an urban area with earthquake countermeasures.
When the mat foundation is formed in the basement, there is no space for people to enter under the floor of the radiation irradiation room, so the mat foundation and the ground shield the radiation.
For example, Article 30-5 of the Medical Law Enforcement Regulations (Medical High Energy Radiation Generator Use Room) stipulates as follows.
The standards for the structural equipment in the medical high energy radiation generator use room are as follows.
The wall shall be able to be healed so that the effective dose on the outside of the wall will be less than 1 millisievert per week. However, this does not apply to painting walls, etc., where the outside is a place where people will not pass or stay.
There should be only one entrance / exit where two people will always enter and exit, and there will be a device at the entrance / exit that automatically indicates when radiation occurs.
(Iii) Attach a sign indicating that the room is for using high-energy radiation generators for medical care.

On the other hand, it is important to make medical facilities such as hospitals seismic isolation and continue to provide medical care not only for inpatients but also during and after the earthquake. Basic seismic isolation is suitable for applying to medical buildings because the entire building can be isolated. The weight of the housing per unit of radiation room is much larger than the rest of the building, and it becomes an unbalanced load in the whole building.
In the present invention, the radiation irradiation room has an earthquake-resistant structure, a seismic isolation device is disposed above the radiation irradiation room, and the other part of the medical building is a basic seismic isolation, so that the load of the radiation irradiation room is isolated. Freed from equipment load.
Since it is possible to eliminate the uneven load of medical buildings that are seismically isolated, it is easy to analyze vibrations caused by earthquakes, and the design of the seismic isolated building and the foundations and the multiple seismic isolation devices placed above the radiation chamber. The type and scale can be limited, and safety, workability, and economy are improved.

The medical building of the present invention forms the mat foundation in the underground part by digging the ground, so that the floor surface of the radiation irradiation room and the wall surface on the natural mountain side are the first proviso of Article 30-5 of the Medical Law Enforcement Regulations. Therefore, the shielding performance can be secured without providing an iron plate.
For example, when the radiation irradiation chamber is arranged at the corner of the medical building, the two walls and the floor in contact with the retaining wall can have a simple shielding wall structure.
The floor slab on the upper floor of the radiation irradiation room is adjusted to the same level as the other parts, and a floor with no steps is constructed including the upper floor. Since there are no steps that cause movement obstacles for medical devices and patients, it is possible to provide a convenient medical facility.
If a radiation irradiation room is provided in the corner of the basement, the floor level other than that part can be made common, and a floor without a level difference can be basically constructed even in the basement part.

The basic structure of the medical seismic isolation building 1 of the present invention is shown in FIG.
The ground foundation 6 is excavated and the mat foundation 5 is formed directly on the ground, and no underground pit is formed. The radiation irradiation chamber 3 is directly attached to the middle portion of the mat base 5 and constructed. A seismic isolation device 43 is installed above the radiation irradiation chamber 3, and a seismic isolation device 42 is installed on the mat foundation 5 in the other general ward 2. As the seismic isolation devices 42 and 43, for example, a laminated rubber seismic isolation device 41 is used. The radiation irradiation chamber 3 has a seismic structure.
The general ward 2 includes an above-ground housing 21 and an underground housing 22, and the radiation irradiation chamber 3 is constructed at an intermediate portion of the underground housing 22.
A seismic isolation pit 44 is provided between the outer periphery of the underground frame 22 and the underground retaining wall 52. An irradiation room side seismic isolation pit 45 is also provided around the wall surface of the radiation irradiation room 3.
Since the floor surface of the radiation irradiation chamber 3 is in contact with the mat foundation 5 and the ground 6, a person does not pass or stagnate. Since the outside of the ceiling wall surface and other peripheral walls may pass or stagnate, a wall having shielding performance in accordance with the rules such as the radiation shielding iron plate 32 is constructed.
A medical seismic isolation building 1 is constructed in the general ward 2 in which the medical building 12 having the radiation irradiation chamber 3 in the mat base portion is subjected to seismic isolation. Rather than having the radiation irradiation room 3 as a separate building, we have realized a medical facility that can effectively use the site.

An example of the radiation irradiation chamber 3 is shown in FIG.
A room 31 surrounded by a floor 36, a ceiling 33, and a peripheral wall 38 is provided. In the illustrated example, a reinforced concrete structure is basically used, and a radiation shielding iron plate 32 is provided on the inner wall surface side. A reinforced concrete structure 39 reinforced as a base structure for mounting the iron plate is constructed on the ceiling and the peripheral wall.
Note that the radiation shielding iron plate is not limited to the iron material, but is used here as a representative example including commonly used materials such as other metals having high radiation shielding performance. In order to exhibit the shielding performance, it is necessary to dispose a thick plate body so that there is no eye gap, so that weight and accuracy are required, and careful consideration is required including the wall structure for mounting. Therefore, the radiation shielding wall not only has a large wall thickness but also requires a technique and a period for its construction.
When building a radiation room as a separate building, the need to match the progress of the general ward is small, but in the present invention where the radiation room is built inside the general ward, Will affect the construction period.

(Embodiment 1)
An example in which the radiation irradiation chamber 3 is formed in the corner of the medical building 12 is shown in FIG.
A radiation irradiating room 3 is arranged at the corners of the general ward 2 and the general ward 2 provided with an above-ground housing 21 and an underground housing 22. The seismic isolation device is directly provided on the mat base 5 in the upper part of the radiation irradiation chamber and in other parts as in FIG.
In this example, the radiation irradiation chamber 3 has the natural mountain side wall 34 in contact with the natural mountain 6 through the underground retaining wall 52.

In addition, the underground structure 22 is on the second floor, the radiation room 3 is constructed in the basement, and the floor level of the first floor of the medical building 12 including the upper part of the radiation room is the same level. Access and obstacles from the outdoors (GL) are structures.
In this example, the frame structure of the radiation irradiation chamber 3 is the same as that shown in FIG. 4, but the radiation irradiation chamber side seismic isolation pit 45 need not be provided on the underground retaining wall side.
Other configurations are the same as those in FIG.

(Embodiment 2)
FIG. 3 shows another example of the medical seismic isolation building 1 in which the radiation irradiation chamber 3 is formed at the corner of the medical building 12.
The example shown in FIG. 2 has a structure in which a radiation shielding iron plate is disposed only on the upper side as a natural mountain side wall side iron plate 37b provided short on the natural mountain side wall 34 of the radiation irradiation chamber 3 and on the upper side of the side wall. On the natural mountain side, the shielding performance against the pit side provided above is secured, and from the middle to the lower side can be managed as a portion where a person does not pass or enter. A side wall iron plate 37a is provided on the front side of the building-inside side wall 35 to provide radiation shielding for people passing through.
As a result, it is possible to reduce the amount of floor and ground-side iron plates used, simplify the preparation, installation, and mounting structure of large and heavy iron plates, saving materials and shortening the construction period.
Other configurations are the same as those in FIG.
When building a radiation room as a separate building, the need to match the progress of the general ward is small, but in the present invention where the radiation room is built inside the general ward, Will affect the construction period. This example can reduce the amount of the iron plate, simplify the construction of the radiation shielding wall structure and the installation process of the iron plate, and contribute to shortening the entire construction period.

DESCRIPTION OF SYMBOLS 1 ... Medical base isolation building 12 ... Medical building 2 ... General ward 21 ... Ground frame 22 ... Underground frame 3 ... Radiation irradiation room 31 ... Room 32 ... Radiation shielding iron plate 33 ... Ceiling 34 ... Natural side wall 36 ... Floor 37a, 37b ... Wall side iron plate 38 ... Peripheral wall 39 ... Reinforced concrete structure 41 ... Laminated rubber seismic isolation device 42 ... Seismic isolation device 43 ... Seismic isolation device 44 ... Seismic isolation pit 45 ... Irradiation room side seismic isolation pit 5 ... Matte foundation 52 ... Underground retaining wall 6 ... Mt.

Claims (4)

  In a medical building, the radiation irradiation room is directly attached to the building foundation, and a seismic isolation device is provided on the radiation irradiation room, and the building part other than the radiation irradiation room is basic seismic isolation. . The foundation is a mat foundation formed in the underground part,
2. The medical seismic isolation building according to claim 1, wherein a radiation shielding metal body is disposed in the radiation irradiation room except for a portion in contact with a natural ground.   The medical isolation building according to claim 1 or 2, wherein the radiation irradiation room has an earthquake-resistant structure. The floor slab immediately above the seismic isolation device arranged in the upper part of the radiation irradiation room is at the same level as the floor slab of the building part of the base isolation system. Medical isolation building.

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