JP2019113363A - Building structure and method for forming shield wall - Google Patents

Abstract

To perform an edge cutting for the shield wall of a column in the shield wall for shielding radiation.SOLUTION: A radiation treatment room 20 includes a shield wall 50 for blocking radiation S; and a column 100 formed above the inner wall 52A of a vertical hole 52 in the shield wall 50, with a space between the inner wall and the column.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a building structure and a method of constructing a shielding wall.

  The cited reference 1 relates to an outer wall structure using a slit material for earthquake resistance in a reinforced concrete building and a construction method thereof, and in particular, a technology related to a construction technique of an outer wall in which the slit material is installed horizontally. In this prior art, the second slit material, in which the joint side is an inclined surface, is placed above the first slit material.

  The reference document 2 discloses a construction method of a seismic slit in which a slit material is inserted into concrete to form a seismic slit, and a technique relating to a support structure of the slit material. In this prior art, a pair of molds covering both side surfaces of the non-load bearing wall is built, and a slit member whose width becomes wider from one end side to the other end side is arranged between the pair of molds. This slit material is removed by pulling out to the wide side of the slit material.

  Patent Document 3 discloses a technology relating to a building in which an aseismic slit material and its aseismic slit material are disposed at a joint between a non-structural wall and a structural part. In this prior art, an aseismic slit material made of a foamed resin material is disposed in a gap formed between a non-structural wall and a structural part, thereby blocking the ventilation of the joint gap and the leakage of rainwater while securing the border. I am trying to do it.

JP 2001-3492 A JP, 2014-141819, A JP, 2012-202079, A

  The shielding wall for shielding radiation is very thick and very high in rigidity, which may result in excessive eccentricity and concentration of horizontal force throughout the building. Thus, it is desirable that the shielding wall be lined with the surrounding building frame. However, since the shielding wall has a very large wall thickness, the pillar may be disposed in the shielding wall, which makes it difficult to cut off the shielding wall and the pillar.

  Therefore, in view of the above facts, the present invention aims to cut off the shielding wall of a column disposed in a shielding wall that shields radiation.

  The invention according to claim 1 is a building structure provided with a shielding wall for shielding radiation, and a pillar provided in the vertical hole formed in the shielding wall with a gap in the inner wall of the vertical hole. .

  According to the first aspect of the present invention, by providing columns in the vertical holes formed in the shielding wall that shields the radiation, the edges of the shielding wall and the columns can be cut. Therefore, the eccentricity of the whole building in which the pillars are disposed in the shielding wall, the concentration of the horizontal force, and the like are suppressed.

  The invention according to claim 2 is that, in a plan view, the side surface of the pillar is inclined with respect to the wall surface of the shielding wall and intersects with the radiation incident on the shielding wall. Building structure.

  According to the second aspect of the present invention, radiation is prevented from passing through the gap between the side surface of the column and the vertical hole, so that the radiation shielding effect is improved.

  The invention according to claim 3 is the building structure according to claim 1 or 2, wherein a gap between the circumferential surface of the pillar and the inner wall of the vertical hole is an air layer.

  In the invention according to claim 3, since the gap between the circumferential surface of the column and the vertical hole is an air layer, the edge between the shielding wall and the column can be cut more completely. Therefore, the eccentricity of the entire building due to the shielding wall and the concentration of horizontal force are suppressed more effectively.

  In the invention of claim 4, in the step of providing the edge cutting member along the circumferential surface of the column, and in the state where the edge cutting member is provided on the circumferential surface of the column, concrete is cast around the column to shield A method of constructing a shielding wall comprising the steps of: constructing a wall; and pulling out the edge cutting member.

  In the invention according to the fourth aspect, concrete is cast in a state where the edge cutting member is provided along the circumferential surface of the column to construct a shielding wall, and then the edge cutting member is pulled out to form a vertical in the shielding wall. A hole can be formed and a pillar can be easily provided in this vertical hole.

  According to the present invention, it is possible to cut off a column and a shielding wall which are disposed in a shielding wall which shields radiation.

It is a horizontal sectional view of the radiation treatment room of one embodiment of the present invention. It is an expansion horizontal sectional view of the principal part of FIG. It is a perspective view of a rim member arranged along a peripheral surface of a pillar. It is an exploded perspective view of a rim member. It is the longitudinal cross-sectional view which built the wall in the state which arrange | positioned the edge cutting member along the surrounding surface of a pillar.

Embodiment
A radiation treatment room to which a building structure according to an embodiment of the present invention is applied will be described.

[Construction]
First, the structure of the radiation treatment room of the present embodiment will be described.

  The radiation treatment room 20 shown in FIG. 1 is provided in a building 10 which is a hospital. The radiation treatment room 20 is surrounded by a reinforced concrete shielding wall 50 for shielding radiation. The thickness of the shielding wall 50 of this embodiment is 1000 mm or more.

  In the radiation treatment room 20, a radiation treatment device 30 is installed. The emission unit 34 of the radiation S emitted from the radiation treatment device 30 to the radiation position 32 moves in a substantially circular trajectory K in plan view centering on the radiation position 32.

  As shown in FIGS. 1 and 2, a vertical hole 52 is formed in the shielding wall 50, and a reinforced concrete pillar 100 is provided in the vertical hole 52.

  As shown in FIG. 2, the pillar 100 has a right-angled triangular shape in plan view that is additionally struck on a main body 110 having a rectangular shape in plan view and a main body side surface 112 in a direction intersecting the wall surface 50A of the shielding wall 50 in the main body 110. And a striking portion 120. The overall shape of the column 100 in a plan view is a parallelogram, as described above, the column 100 configured by the column main body 110 in a plan view rectangular shape and the striking portion 120 in a plan view right-angled triangle shape.

  That is, the side surface 104 in the direction intersecting the wall surface 50A of the shielding wall 50 in the circumferential surface 102 of the column 100 is inclined with respect to the wall surface 50A. Further, the inclined side surfaces 104 of the pillar 100 intersect with the aforementioned radiation S in a plan view.

  Further, a gap is provided between the entire circumferential surface 102 of the pillar 100 and the inner wall 52 A of the vertical hole 52 in the shielding wall 50, and the gap is an air layer 60.

[How to build a radiation treatment room]
Next, an example of a method of constructing the radiation treatment room 20 will be described.

  As shown in FIG. 3, the striking portion 120 is additionally hit on the side surface 112 of the existing column main body 110 (see also FIG. 2). An edge cutting member 200 is provided along the circumferential surface 102 of the pillar 100.

  As shown in FIG. 3, FIG. 4 and FIG. 5, the edge cutting member 200 sandwiches two full screw bolts 220 as an example of a wire with a plate member 210 composed of two sheets of expanded polystyrene etc. Sheet members 230 and 232 made of sheet metal are fastened by nuts 222 above and below the bolt 220. The upper plate member 230 is provided with a mounting portion 234 to which a wire 236 (see FIG. 4) described later is attached.

  As shown in FIG. 4, in one plate surface 210 </ b> A of the plate-like member 210, a groove portion 212 into which the all screw bolt 220 is inserted is formed.

  Then, as shown in FIG. 5, concrete is cast around the pillar 100 provided with the edge cutting member 200 along the circumferential surface 102 as described above, and after the shielding wall 50 is constructed, it is shown in FIG. As described above, the wire 236 is attached to the attachment portion 234 of the upper plate member 230 and pulled up, and the edge cutting member 200 is pulled out.

  By such a method, the pillar 100 is provided in the vertical hole 52 of the shielding wall 50 with a gap from the inner wall 52A.

[Action and effect]
Next, the operation and effects of the present embodiment will be described.

  In the radiation treatment room 20 of the present embodiment, by providing the pillar 100 in the vertical hole 52 formed in the shielding wall 50 for shielding the radiation S, the edges of the shielding wall 50 and the pillar 100 are cut. Accordingly, the eccentricity of the entire building 10 in which the pillars 100 are disposed in the shielding wall 50 is prevented from being excessive, concentration of horizontal force, and the like.

  Further, the circumferential surface 102 of the column 100 and the inner wall 52A of the vertical hole 52 do not contact, and the gap is an air layer 60. Therefore, the edge of the shielding wall 50 and the pillar 100 can be cut completely. Therefore, the eccentricity of the entire building 10 due to the shielding wall 50 and the concentration of the horizontal force are suppressed more effectively.

  In addition, concrete is cast in a state where the edge cutting member 200 is provided along the circumferential surface 102 of the column 100 to construct the shielding wall 50, and then the edge cutting member 200 is pulled out to form vertical holes in the shielding wall 50. 52 can be formed, and the pillar 100 can be easily provided in the vertical hole 52.

  The side surface 104 of the pillar 100 is inclined with respect to the wall surface 50A of the shielding wall 50 and intersects with the radiation S. Thus, the radiation S is prevented from passing through the gap (in the present embodiment, the air layer 60) between the circumferential surface 102 of the column 100 and the inner wall 52A of the vertical hole 52, so the shielding effect of the radiation S is improved. .

<Others>
The present invention is not limited to the above embodiment.

  For example, in the above embodiment, the gap between the inner wall 52A of the vertical hole 52 of the shielding wall 50 and the circumferential surface 102 of the pillar 100 is the air layer 60, but is not limited to this. In the gap between the inner wall 52A of the vertical hole 52 and the circumferential surface 102 of the column 100, a plate material such as a plate member 210 made of expanded polystyrene or the like may be sandwiched.

  In this case, an edge-cut plate (for example, a plate-like member 210 made of expanded polystyrene or the like) is attached along the circumferential surface 102 of the column 100, and concrete is cast in this state to construct the shielding wall 50. And the end plate material may be buried in the shielding wall 50 as it is.

  Moreover, in the said embodiment, while the side surface 104 of the pillar 100 inclines with respect to the wall surface 50A of the shielding wall 50, although it crossed with respect to the radiation S which injects into the shielding wall 50, it is not limited to this. The pillar 100 may be rectangular or circular. Also, the side surface 104 of the pillar 100 may be parallel to the radiation S.

  In addition, the present invention can be applied to shielding walls other than the radiation treatment room 20.

  Furthermore, the present invention can be implemented in various aspects without departing from the scope of the present invention.

50 Shielding Wall 50A Wall 52 Vertical Hole 52A Inner Wall 60 Air Layer 100 Column 104 Side 200 Edge Cutting Member S Radiation

Claims (4)

A shielding wall that shields radiation,
In the vertical hole formed in the shielding wall, a pillar provided with a gap in the inner wall of the vertical hole,
Building structure equipped with In plan view, the side surfaces of the pillars are inclined with respect to the wall surface of the shielding wall and intersect with the radiation incident on the shielding wall.
The building structure according to claim 1. A gap between the circumferential surface of the column and the inner wall of the vertical hole is an air layer,
The building structure according to claim 1 or 2. Providing a cutting member along the circumferential surface of the column;
Placing concrete in the periphery of the pillar in a state in which the edge cutting member is provided on the circumferential surface of the pillar, and constructing a shielding wall;
Pulling out the rim member;
How to construct a shielded wall with