building

Abstract

To provide a building capable of suppressing stress concentration in a concrete skeleton accommodating a radioactive medical treatment device placed in the building and suppressing increase in story height of a story on which the concrete skeleton is installed.SOLUTION: A building 10 comprises: a concrete skeleton 20 placed in the building 10, supported in a base-isolated state, and accommodating a linac R; and a floor slab 16B on an upper story of a story on which the concrete skeleton 20 is placed, the floor slab placed with a clearance V2 between itself and a wall part 22 of the concrete skeleton 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a building having a concrete structure that houses a radiotherapy device. [Background technology]

[0002] The following Patent Document 1 shows a framework structure in which a radiation shielding structure is constructed within a building. The radiation shielding structure is a highly rigid structure in which the walls, ceiling framework, floor framework, etc. are made thick to block radiation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-057188 ​​A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to shield radiation, it is necessary to use a structure with a large mass. As a structure with a large mass, for example, a structure constructed of lead is conceivable. However, from the viewpoint of workability and construction costs, generally, a structure constructed mainly of concrete, such as the radiation shielding structure of the above-mentioned Patent Document 1, is often used.

[0005] As such, radiation shielding structures are made of highly rigid concrete structures with thick walls, ceilings and floors, and therefore are more susceptible to stress concentration during an earthquake than the surrounding parts of the building.

[0006] When such a radiation shielding structure is supported by a seismic isolation member, a large pull-out force acts on the seismic isolation member. Therefore, in order to prevent the large pull-out force from acting on the seismic isolation member, the radiation structure may be structurally separated from the surrounding frame to prevent stress concentration on the radiation shielding structure.

[0007] Specifically, the slab forming the floor structure of the upper floor of the radiation shielding structure may be constructed above the radiation shielding structure to structurally separate the radiation structure from the surrounding structure. However, when such a structure is adopted, the floor height of the floor on which the radiation shielding structure (the concrete structure housing the radiation therapy device) is installed becomes large, and the construction cost becomes high.

[0008] Taking into consideration the above-mentioned facts, the present invention aims to provide a building that can suppress stress concentration in a concrete structure that houses a radiation therapy device to be installed within the building, and can suppress an increase in the floor height of the floor on which this concrete structure is installed. [Means for solving the problem]

[0009] The building of claim 1 comprises a concrete skeleton that is provided in the building and is supported by seismic isolation and that houses a radiotherapy device, and a wall portion of the concrete skeleton. Horizontally and a floor slab of the floor above the floor on which the concrete structure is placed, the floor slab being arranged with a clearance provided.

[0010] In the building of claim 1, a clearance is provided between the wall of the concrete skeleton and the floor slab of the upper floor. This reduces stress transfer caused by contact between the concrete skeleton and the floor slab, and reduces stress concentration in the concrete skeleton.

[0011] In addition, compared to a structure in which the floor slab is placed above the concrete structure and a clearance is provided between the upper surface of the concrete structure and the lower surface of the floor slab, there is no need to increase the floor height of the floor on which the concrete structure is installed. Also, there is no need to cut down the foundation that supports the concrete structure. This allows for reduced construction costs for the floor on which the concrete structure is installed.

[0012] A building according to claim 2 is the building according to claim 1, in which the upper end surface of the concrete skeleton and the upper surface of the floor slab are disposed at the same height.

[0013] In the building of claim 2, there is no step between the upper surface of the concrete skeleton and the upper surface of the floor slab. Therefore, the space above the concrete skeleton and the space above the floor slab can be used together as a barrier-free space.

[0014] A building according to claim 3 is the building according to claim 2, wherein a plurality of the concrete skeletons are integrally formed, and the upper surfaces of the plurality of the concrete skeletons are at the same height.

[0015] In the building of claim 3, the top surfaces of the multiple concrete structures formed integrally are at the same height. This ensures a large space above the concrete structures that can be used integrally.

[0016] The building of claim 4 is a building described in any one of claims 1 to 3, wherein the upper surface of the floor structure forming the concrete structure and the upper surface of the floor slab on the floor on which the concrete structure is installed are at the same height.

[0017] In the building of claim 4, the top surface of the floor structure forming the concrete structure and the top surface of the floor slab on the floor on which the concrete structure is installed are at the same height. This reduces the amount of digging into the ground compared to when the floor structure forming the concrete structure is formed at a lower position. This allows the construction period to be shortened. The building of claim 5 is a building according to any one of claims 1 to 4, further comprising an insertion hole formed in the wall portion, and a column whose base is connected to the floor structure of the concrete structure, passing through the insertion hole and having a lateral clearance between the insertion hole and the column. The building of claim 6 is the building described in any one of claims 1 to 5, in which surrounding structures other than the concrete structure are also supported for seismic isolation, and the floor structure of the concrete structure and the floor slabs of the surrounding structures are connected to each other. Effect of the Invention

[0018] According to the present invention, it is possible to suppress stress concentration on a concrete structure that houses a radiotherapy device installed in a building, and also to suppress an increase in the floor height of the floor on which this concrete structure is installed. [Brief description of the drawings]

[0019] [Figure 1]FIG. 2 is an elevational cross-sectional view showing the floor on which a concrete structure forming a radiation therapy room is installed and the floor above that floor in a building according to an embodiment of the present invention. [Diagram 2] 1 is a schematic plan view of a floor on which a concrete structure is installed in a building according to an embodiment of the present invention. [Diagram 3] 1 is a schematic plan view of a floor above a floor on which a concrete structure is installed in a building according to an embodiment of the present invention. [Figure 4] FIG. 2 is a partially enlarged cross-sectional view showing an expansion joint formed in the clearance between a concrete structure and a floor slab in a building according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a cross-sectional elevation view showing a building according to a comparative example. [Figure 6] FIG. 11 is a cross-sectional elevation view showing a building according to another comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, a building according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and may be present in multiple numbers.

[0021] In addition, the description of the same configuration and reference numerals in each drawing may be omitted. Note that the present invention is not limited to the following embodiment, and may be modified as appropriate within the scope of the object of the present invention, such as omitting configurations or replacing them with different configurations.

[0022] In each figure, the directions indicated by the arrows X and Y are directions along the horizontal plane and are perpendicular to each other. The direction indicated by the arrow Z is a direction along the vertical direction (up and down direction). The directions indicated by the arrows X, Y, and Z in each figure are assumed to be mutually consistent.

[0023] (building) FIG. 1 shows a floor (first floor) on which a concrete skeleton 20 forming a radiation therapy room is installed and the floor above that floor (second floor) in a building 10 according to an embodiment of the present invention.

[0024] The building 10 is a seismically isolated building of reinforced concrete construction, and is formed by an upper skeleton 10A being supported on a lower skeleton 10B, which serves as the foundation, via seismic isolation members 30. The upper skeleton 10A is a column-beam structure in which beams 14 are suspended across columns 12.

[0025] (Elevation layout of concrete structure) The concrete skeleton 20 is placed on the first floor, which is the lowest floor of the building 10 excluding the seismic isolation layer (the floor where the seismic isolation members 30 are installed), and the inside is divided into three radiation therapy rooms C1, C2, and C3. Each of the radiation therapy rooms C1, C2, and C3 houses a linac R, which is a radiation therapy device.

[0026] In addition, in the radiation therapy rooms C1, C2, and C3, various types of radiation therapy devices, such as a gamma knife, tomotherapy, etc., may be installed in addition to the linac R.

[0027] In order to prevent radiation generated by the linac R from leaking out of the radiation treatment rooms C1, C2, and C3, the wall portion 22 of the concrete structure 20 is formed to be thicker than the other walls of the building 10.

[0028] For the same reason, the floor framework 24 and ceiling framework 26 of the concrete framework 20 are formed thicker than the other slabs in the building 10 (for example, the floor slab 16A on the first floor and the floor slab 16B on the second floor).

[0029] The floor slab 16A of the first floor is connected to the concrete structure 20. On the other hand, the floor slab 16B of the second floor is not connected to the concrete structure 20.

[0030] Specifically, the floor slab 16B of the second floor is not disposed in the portion where the concrete skeleton 20 is formed. Therefore, in the floor slab 16B of the second floor, an opening V1 penetrating in the vertical direction is formed in the portion where the concrete skeleton 20 is formed.

[0031] The concrete skeleton 20 is disposed so as to penetrate the opening V1 formed in the floor slab 16B in the vertical direction. A clearance V2 is provided between the wall 22 of the concrete skeleton 20 and the floor slab 16B. The clearance V2 is a part of the opening V1.

[0032] Furthermore, the upper surface of the concrete skeleton 20 (the upper surface of the ceiling skeleton 26) and the upper surface of the floor slab 16B are disposed at the same height. Note that "the same height" means that the finished height is the same, and the height of the concrete excluding the finishing materials and base materials does not necessarily have to match.

[0033] (Plane layout of concrete structure) 2 shows a schematic plan view of the first floor of the building 10 where the concrete skeleton 20 is installed. Note that in this drawing, the walls of the building 10 (structural walls and partition walls) and the like arranged outside the concrete skeleton 20 are omitted.

[0034] As shown in this figure, the pillars 12 are arranged at predetermined intervals in the X and Y directions, and each pillar 12 is connected by a beam 14 (not shown) (see FIG. 1). The concrete skeleton 20 is arranged across three spans of the pillars 12 in the X direction. In addition, the concrete skeleton 20 is arranged across two spans of the pillars 12 in the Y direction.

[0035] In addition, "arranged across three spans of columns 12 in the X direction" indicates that the concrete structure 20 is arranged within an area spanning the two central columns 12 out of four consecutive columns in the X direction.

[0036] Similarly, "arranged across two spans of column 12 in the Y direction" indicates that the concrete structure 20 is arranged within an area spanning the central column 12 of three consecutive columns in the Y direction.

[0037] Therefore, the concrete structure 20 and the two columns 12A are arranged so as to overlap each other in a plan view. Specifically, among the walls 22 of the concrete structure 20, the walls 22A that divide the radiation therapy rooms C1, C2, and C3 and the columns 12A are arranged so as to overlap each other.

[0038] Therefore, in this embodiment, an insertion hole 22AH through which the column 12A penetrates is formed in the wall 22A. A clearance V3 is formed between the column 12A and the insertion hole 22AH. This clearance V3 is set to be equal to or greater than the total width of the inter-story displacement (design displacement) of the wall 22A during an earthquake and the inter-story displacement (design displacement) of the column 12A. Note that the base portion of the column 12A is connected to the floor structure 24 of the concrete structure 20 as shown in FIG. 1.

[0039] 2, the seismic isolation members 30 are disposed below the columns 12. The seismic isolation members 30 are also disposed below the concrete structure 20. The positions, sizes and quantities of the seismic isolation members 30 disposed below the concrete structure 20 are appropriately determined according to the weight of the concrete structure 20.

[0040] (Upper floor plan) 3 is a plan view showing an outline of the upper floor (second floor) of the building 10 above the floor on which the concrete skeleton 20 is installed. On the second floor of the building 10, the upper surface of the ceiling skeleton 26 that forms the concrete skeleton 20 forms part of the floor surface.

[0041] The floor slab 16B of the building 10 is disposed so as to surround all four sides of the concrete skeleton 20. As described above, a clearance V2 is provided between the concrete skeleton 20 and the floor slab 16B. This clearance V2 is set to be equal to or greater than the total width of the inter-story displacement (design displacement) of the wall portion 22 during an earthquake and the inter-story displacement (design displacement) of the floor slab 16B.

[0042] Here, as shown in Fig. 1, the inside of the concrete structure 20 is divided into three radiation treatment rooms C1, C2, and C3. In the concrete structure 20, the upper surfaces of the ceiling structures 26 above the radiation treatment rooms C1, C2, and C3 are at the same height. As a result, as shown in Fig. 3, a space that can be used as a whole is formed on the upper surface of the concrete structure 20.

[0043] 1, the beam 14 on the floor above the floor on which the concrete skeleton 20 is installed is a cantilever beam, and terminates at a location facing the clearance V2. However, the embodiment of the present invention is not limited to this, and the beam 14 may be inserted through the upper end of the wall portion 22 and the inside of the ceiling skeleton 26 to be connected to the column 12A.

[0044] In this case, a clearance is also provided between the beams 14 and the ceiling structure 26 to make it difficult for stress to be transmitted between the beams 14 and the ceiling structure 26. An elastic material or the like that can tolerate relative displacement between the beams 14 and the ceiling structure 26 may be placed in this clearance.

[0045] (Expansion joint) As shown in Fig. 3, an expansion joint 50 (hereinafter referred to as a joint material 50) is provided in the clearance V2 provided between the concrete body 20 and the floor slab 16B. The joint material 50 is provided in both the portion along the X direction and the portion along the Y direction in the clearance V2 shown in Fig. 3.

[0046] As shown in FIG. 4, the joint material 50 is formed by including a bent plate 52, rock wool 54, a sealant 56, Styrofoam (registered trademark) 57, and an expansion joint 58.

[0047] The bent plate 52 is a steel plate fixed to the side surface of the wall portion 22 of the concrete skeleton 20 with bolts or concrete screws. The bent plate 52 is a long member formed by bending a steel plate into an angle shape (L-shaped cross section), and is installed along the front-to-rear direction of the paper surface of Fig. 4. Furthermore, one piece 52A of the bent plate 52 is fixed to the side surface of the wall portion 22, and the other piece 52B is disposed in contact with the lower surface of the floor slab 16B.

[0048] Above the bent plate 52, the clearance V2 is filled with rock wool 54. The rock wool 54 is provided for the purpose of heat insulation and soundproofing between the second floor and the first floor. In addition, the upper end surface of the rock wool 54 is covered with a sealing material 56. The sealing material 56 is provided mainly for the purpose of ensuring watertightness.

[0049] Here, tiles 60 as a finishing material and leveling mortar 62 as a base material for the tiles 60 are laid on the upper surface of the concrete structure 20 and the upper surface of the floor slab 16B.

[0050] In order to separate the leveling mortar 62 laid on the upper surface of the concrete skeleton 20 from the leveling mortar 62 laid on the upper surface of the floor slab 16B, Styrofoam (registered trademark) 57 is placed above the sealant 56. Moreover, above the Styrofoam (registered trademark) 57, an expansion joint 58 that constitutes the joint of the tile 60 is provided.

[0051] In this way, the joint material 50 is provided in the clearance V2 between the concrete skeleton 20 and the floor slab 16B to close the gap. In addition, the rock wool 54, the sealant 56, the Styrofoam (registered trademark) 57, and the expansion joint 58 that form the joint material 50 are deformable when subjected to an external force.

[0052] As a result, even if the concrete structure 20 and the floor slab 16B move relatively to each other during an earthquake, the transfer of stress between the concrete structure 20 and the floor slab 16B is suppressed.

[0053] (Action and Effects) 1, in the building 10 according to this embodiment, a clearance V2 is provided between the wall 22 of the concrete skeleton 20 and the floor slab 16B of the floor above the floor on which the concrete skeleton 20 is installed. In addition, a clearance V3 is also provided between the column 12A and the insertion hole 22AH.

[0054] Therefore, during an earthquake, stress transmission due to contact between the concrete skeleton 20 and the floor slab 16B is suppressed, and stress concentration on the concrete skeleton 20 is suppressed. This also makes it possible to suppress the concentration of pull-out force on the seismic isolation member 30 supporting the concrete skeleton 20.

[0055] 5 shows a building 102 according to a comparative example. In the building 102, a floor slab 16B is disposed above a concrete skeleton 20, and a clearance is provided between the upper surface of the concrete skeleton 20 and the lower surface of the floor slab 16B. While this type of structure can suppress stress concentration on the concrete skeleton 20, it is necessary to increase the floor height of the floor on which the concrete skeleton is installed (floor height H2).

[0056] 6 shows a building 100 according to another comparative example. In the building 100, similar to the building 102, the floor slab 16B is disposed above the concrete skeleton 20, and a clearance is provided between the upper surface of the concrete skeleton 20 and the lower surface of the floor slab 16B.

[0057] Furthermore, in the building 100, the floor height of the floor on which the concrete skeleton 20 is installed is the same as the floor height of the building 10 according to the embodiment of the present invention (floor height H1). In this case, it is necessary to excavate the ground in the portion on which the concrete skeleton 20 is installed and build the lower skeleton 10B at a lower position (for example, excavation depth H3=H2-H1).

[0058] Furthermore, in the building 100, the floor structure 24 of the concrete structure 20 is formed at a position lower than the floor slab 16A of the first floor, so that it is necessary to provide means of vertical movement such as stairs or an elevator.

[0059] As shown in the buildings 102 and 100 according to these comparative examples, when the floor slab 16B is placed above the concrete skeleton 20, it is necessary to increase the floor height of the floor on which the concrete skeleton 20 is installed. Alternatively, it is necessary to dig down the ground in the area where the concrete skeleton 20 is installed. This requires more construction materials and increases the number of construction steps.

[0060] In contrast, in the building 10 according to the embodiment of the present invention, as shown in FIG 1, the upper surface of the concrete skeleton 20 and the upper surface of the floor slab 16B are disposed at the same height. Therefore, it is not necessary to increase the floor height of the floor on which the concrete skeleton 20 is installed (floor height H1 <H2)。

[0061] In the building 10 according to this embodiment, the upper surface of the floor structure 24 forming the concrete structure 20 and the upper surface of the floor slab 16A of the floor on which the concrete structure 20 is installed are at the same height. Therefore, it is not necessary to construct the lower structure 10B supporting the concrete structure 20 at a low position.

[0062] In the building 10 according to this embodiment, there is no step between the upper surface of the concrete skeleton 20 and the upper surface of the floor slab 16B, as shown in Fig. 4. Furthermore, a joint material 50 is provided in the clearance V2 provided between the concrete skeleton 20 and the floor slab 16B.

[0063] Therefore, the space above the concrete structure 20 and the space above the floor slab 16B can be used together as a barrier-free space.

[0064] In the building 10 according to this embodiment, the interior of the concrete structure 20 is partitioned into three radiation treatment rooms C1, C2, and C3, as shown in Fig. 1. In other words, the concrete structure 20 is constructed by arranging a plurality of concrete structures each having the radiation treatment rooms C1, C2, and C3 adjacent to each other and integrally forming them.

[0065] In the concrete structure 20, the upper surfaces of the ceiling structures 26 above the radiation treatment rooms C1, C2, and C3 are at the same height.

[0066] This allows a larger space to be secured above the concrete structures forming the radiation treatment rooms C1, C2, and C3, compared to a case in which each of the concrete structures is arranged independently.

[0067] In the building 10 according to this embodiment, the interior of the concrete structure 20 is partitioned into three radiation therapy rooms C1, C2, and C3, but the embodiment of the present invention is not limited to this. For example, the concrete structure 20 may have one or two radiation therapy rooms therein, or may have four or more radiation therapy rooms.

[0068] In addition, in the building 10 according to this embodiment, as shown in FIG. 2, the concrete structure 20 is arranged across three spans of the columns 12 in the X direction and across two spans of the columns 12 in the Y direction, but the embodiment of the present invention is not limited to this.

[0069] The size and arrangement of the concrete skeleton 20 are not particularly limited as long as the size necessary for the radiation therapy room can be secured. For example, the concrete skeleton 20 may be arranged over four or more spans of the pillars 12 in the X direction, or over two or less spans.

[0070] Similarly, the concrete skeleton 20 may be arranged across three or more spans of the pillar 12 in the Y direction, or may be arranged to fit within one span. When the concrete skeleton 20 is arranged to fit within one span of the pillar 12 in the Y direction, it is not necessary to form an insertion hole 22AH through which the pillar 12A penetrates in the wall portion 22A.

[0071] In addition, in the building 10 according to this embodiment, the concrete skeleton 20 is disposed in an inner portion of the building 10. That is, as shown in Fig. 3, the concrete skeleton 20 is disposed so as to be surrounded on four sides by the floor slab 16B of the building 10. However, the embodiment of the present invention is not limited to this.

[0072] For example, the concrete skeleton 20 may be disposed facing the outer periphery of the building 10. In this case, the concrete skeleton 20 is disposed facing the outdoors and surrounded on two or three sides by the floor slab 16B of the building 10. [Explanation of symbols]

[0073] 10. Building 16A Floor slab 16B Floor slab 20 Concrete structure 24 Floor frame 22 Wall V2 Clearance R Linac (radiation therapy device)

Claims

1. a concrete framework that is provided within the building and is supported by seismic isolation and that houses a radiation therapy device; A floor slab of a floor above the floor on which the concrete structure is arranged, the floor slab being arranged with a lateral clearance between the floor slab and a wall portion of the concrete structure; A building having:

2. The building according to claim 1 , wherein the upper surface of the concrete structure and the upper surface of the floor slab are disposed at the same height.

3. A plurality of the concrete bodies are integrally formed, The building according to claim 2 , wherein the upper surfaces of the plurality of concrete structures are at the same height.

4. A building as claimed in any one of claims 1 to 3, wherein the upper surface of the floor structure forming the concrete structure and the upper surface of the floor slab of the floor on which the concrete structure is installed are at the same height.

5. A through hole formed in the wall portion; a column having a base connected to a floor body of the concrete body, the column passing through the insertion hole and having a lateral clearance formed between the insertion hole and the column; The building according to any one of claims 1 to 4, comprising:

6. The surrounding structures other than the concrete structure are also supported by seismic isolation, The floor structure of the concrete structure and the floor slab of the surrounding structure are connected to each other. A building according to any one of claims 1 to 5.

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