JP6694367B2 - Method for manufacturing concrete pit of radioactive waste burial facility and concrete pit of radioactive waste burial facility - Google Patents

Description

  The present invention relates to a method for manufacturing a concrete pit for a radioactive waste burial facility, and a concrete pit for a radioactive waste burial facility.

  As a concrete pit of a conventional radioactive waste burial facility, the one shown in Patent Document 1 is known. This concrete pit is buried in a groove formed in soil or rock and contains radioactive waste in a sealed state. The concrete pit is buried in the ground while containing radioactive waste.

JP, 2015-34798, A

  The concrete pit of the radioactive waste burial facility as described above was constructed by pouring concrete on site. However, when all the walls of the concrete pit are formed by pouring concrete, there is a problem that it takes time to construct. Therefore, there is a need for a method of manufacturing a concrete pit for a radioactive waste burial facility that can shorten the construction period.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for manufacturing a concrete pit of a radioactive waste burial facility that can shorten the construction period, and a concrete pit of a radioactive waste burial facility. ..

  In the method for manufacturing a concrete pit of a radioactive waste burying facility according to one aspect of the present invention, the wall forming step of forming at least a part of the wall forming the concrete pit includes a plate-shaped member at the installation position of the wall. And a plate-shaped member arranging step for arranging.

  In this method for manufacturing a concrete pit of a radioactive waste burial facility, in the wall forming step of forming at least a part of the wall forming the concrete pit, the plate-like member for arranging the plate-like member at the installation position of the wall Including a placement step. As described above, at least a part of the wall portion forming the concrete pit has a configuration including the plate-like member arranged at the installation position. Therefore, the wall portion can be formed in a shorter time by using the plate member that is formed in advance, as compared with the case where the entire wall portion is formed by pouring concrete. From the above, the construction period can be shortened.

  In the plate member arranging step, an assembly having at least two surfaces intersecting with each other may be arranged, and the assembly may include a plate member arranged at the installation position of the wall portion on at least one surface. As described above, the wall portion of the concrete pit is formed only by preparing in advance an assembly including at least a plate-shaped member and having at least two surfaces and arranging the assembly on site. be able to. Therefore, the construction period can be further shortened.

  The wall portion may be formed by a combination of a plate-shaped member of one assembly and a plate-shaped member of another assembly. With such a configuration, the weight of the plate member per one surface of the assembly is reduced. Therefore, the deviation of the center of gravity in the assembly can be reduced as compared with the case where the plate-shaped member per surface constitutes the entire wall portion. Therefore, the balance of the assembly is improved when the assembly is transported.

  A gap may be formed between the plate-shaped member of one assembly and the plate-shaped member of another assembly, and the gap may be filled with a filler. Accordingly, the plate-shaped member of the assembly can be made to function like a mold of the filler, so that the time for constructing the mold can be shortened.

  The plate-shaped member of the assembly may form the entire one wall portion. With this, the entire wall portion can be configured only by the plate-shaped member, so that the construction period can be shortened.

  At least one surface of the assembly may include a porous layer having pores. This makes it possible to easily form the porous layer.

  The plate-shaped member may form a part of the wall portion. Since the plate-shaped member constitutes a part of the wall portion, the plate-shaped member is lighter in weight than that constituting the entire wall portion, and the work such as installation becomes easier.

  The plate-shaped member may form a part in the thickness direction of the wall portion. As a result, it is possible to obtain the effect of reducing the weight when transported.

  The wall portion may include a plurality of plate-shaped members facing each other in the thickness direction, and the gap between the plate-shaped members may be filled with a filler. This allows the plate-shaped member to function like a mold for the filling material, thus shortening the time for constructing the mold.

  The plate-shaped member may form a part of the wall portion in the lateral direction. As a result, it is possible to obtain the effect of reducing the weight when transported.

  The plate-shaped member may form a part in the height direction of the wall portion. As a result, it is possible to obtain an effect that the weight is reduced when transported and an effect that the balance at the time of assembling is improved because the parts are assembled in order from the bottom.

  In the concrete pit of the radioactive waste burying facility according to one aspect of the present invention, at least a part of the wall portion forming the concrete pit includes a plate member.

  According to this concrete pit of the radioactive waste burial facility, it is possible to obtain the same action and effect as the method for manufacturing the concrete pit of the radioactive waste burial facility described above.

  The concrete pit may include an assembly having at least two surfaces intersecting with each other, and the assembly may include a plate-shaped member included in a wall on at least one surface. As described above, the wall portion of the concrete pit is formed only by preparing in advance an assembly that includes at least a plate-shaped member and is constructed so as to have two surfaces, and disposing the assembly on site. be able to. Therefore, the construction period can be further shortened.

  The plate-shaped member may form a part of the wall portion. Since the plate-shaped member constitutes a part of the wall portion, the plate-shaped member is lighter in weight than that constituting the entire wall portion, and the work such as installation becomes easier.

  According to the present invention, the construction period of the concrete pit of the radioactive waste burial facility can be shortened.

It is the figure which looked at a radioactive waste burial facility from the upper part. It is sectional drawing which followed the II-II line shown in FIG. It is a top view which showed notionally an example of the combination structure of the assembly of a concrete pit. FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 3. It is sectional drawing for demonstrating the manufacturing method of a concrete pit. It is a perspective view of an assembly. It is sectional drawing for demonstrating the manufacturing method of the concrete pit which concerns on a modification. It is a perspective view for explaining the manufacturing method of the concrete pit which concerns on a modification. FIG. 9 is a sectional view taken along line IX-IX shown in FIG. 8. It is a perspective view for explaining the manufacturing method of the concrete pit which concerns on a modification. It is a perspective view for explaining the manufacturing method of the concrete pit which concerns on a modification.

  Hereinafter, preferred embodiments of a concrete pit of a radioactive waste burying facility and a manufacturing method thereof according to an aspect of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a view of a radioactive waste burial facility viewed from above. However, FIG. 1 shows a state in which the soil or bedrock of the concrete pit 10 is removed. As shown in FIG. 1, the radioactive waste burial facility 100 includes a plurality of concrete pits 10 arranged in a vertical direction and a horizontal direction on a paper surface. FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. As shown in FIG. 2, the concrete pit 10 is arranged on the bottom surface of the groove portion 101 formed by excavating the soil 105 (which may be rock, but soil is exemplified here). Further, the inside of the groove portion 101 is filled with the mixed soil 102 together with the concrete pit 10. As the mixed soil 102, for example, pentonite mixed soil is used. The upper sides of the mixed soil 102 and the soil 105 are covered with a soil 103. In the following description, one direction in the arrangement direction of the concrete pits 10 may be referred to as “X-axis direction” and the other direction in the arrangement direction may be referred to as “Y-axis direction”.

  The concrete pit 10 has a flat rectangular parallelepiped shape and has a space inside. The concrete pit 10 has a rectangular bottom wall 11 that spreads horizontally on the bottom surface of the groove portion 101, side walls 12 that rise upward from four outer edge portions of the bottom wall 11, and horizontally confronts the bottom wall 11. An upper wall 13 whose outer edge is connected to the side wall 12. The bottom wall 11, the side wall 12, and the upper wall 13 form an outer wall of the concrete pit 10. The bottom wall 11 and the upper wall 13 have a pair of outer edge portions parallel to the Y-axis direction and a pair of outer edge portions parallel to the X-axis direction. Therefore, among the four side walls 12, the pair of side walls 12 extends parallel to the X-axis direction, and the other pair of side walls 12 extends parallel to the Y-axis direction.

  Further, the internal space formed inside the concrete pit 10 by the outer wall is partitioned by a plurality of partitions 14 extending in the vertical direction. The partition walls 14 extend in the X-axis direction in the concrete pit 10 and are arranged in the Y-axis direction at regular intervals. Further, the partition walls 14 extend in the Y-axis direction in the concrete pit 10 and are arranged in the X-axis direction at regular intervals. Further, each partition 14 extends from the bottom wall 11 to the upper wall 13, and the lower end and the upper end are fixed to the bottom wall 11 and the upper wall 13, respectively.

  The concrete pit 10 has a plurality of storage spaces 16 by partitioning the inside by a partition 14. The radioactive waste R is stored in each storage space 16. The radioactive waste R is packed in drums and stacked in the storage space 16 in a bag. In addition, in the storage space 16, the space other than the radioactive waste R is filled with a filling material 17 such as concrete without a gap. Each concrete pit 10 is provided with an inspection path 18 for inspecting water intrusion.

  Next, a method for manufacturing the concrete pit 10 according to the present embodiment will be described. The method for manufacturing the concrete pit 10 comprises a step of forming a groove portion 101 for burying the concrete pit 10, an outer wall forming step of forming the bottom wall 11 and the side wall 12 as outer walls of the concrete pit 10, and the concrete pit 10. A wall forming step of forming at least a part of the wall (the partition 14 in the present embodiment), and a radioactive waste in which the radioactive waste R is placed in the concrete pit 10 and filled with a filler 17 such as concrete to be solidified. By placing the upper wall 13 of the concrete pit 10 and forming the upper wall 13 of the concrete pit 10 to seal the radioactive waste R in the storage space 16, and by covering the concrete pit 10 with the mixed soil 102 and the soil 103. And a step of embedding in.

  The wall forming step of the above manufacturing method will be described in detail. In order to make the description, the configuration of the concrete pit 10 manufactured by the manufacturing method according to the present embodiment will be described in detail with reference to FIGS. 3 and 4. However, the concrete pit 10 of FIGS. 3 and 4 is only an example of the configuration, and the shape of each wall portion, the number of the storage spaces 16 and the like are not particularly limited and can be appropriately changed. In the concrete pit 10 shown in FIG. 3, the upper wall 13, the radioactive waste R inside and the filler 17 are omitted. Further, in the concrete pit 10 shown in FIG. 4, the radioactive waste R and the filling material 17 inside are omitted.

In the concrete pit 10 shown in FIGS. 3 and 4, the side wall 12 on the X axis direction negative side is the side wall 12A, the side wall 12 on the X axis direction positive side is the side wall 12B, and the side wall 12 on the Y axis direction negative side is the side wall 12C. And the side wall 12 on the Y axis direction positive side is defined as a side wall 12D. Further, it is assumed that the intermediate partitions 14A, 14B, 14C are formed from the negative side in the X-axis direction toward the positive side. Partitions 14D, 14E, and 14F are formed from the Y axis direction negative side toward the positive side. The interior of the concrete pit 10 thus configured is divided into 16 storage spaces 16. For convenience of explanation, as shown in FIG. 3, each storage space 16 is denoted by “16 _{1 to} 16 ₁₆ ”. Porous layers 26A, 26B, 26C and 26D are formed on the inner surfaces of the side walls 12A, 12B, 12C and 12D. Further, on the upper surface of the bottom wall 11, the porous layer 26E is formed in the portion corresponding to each of the storage spaces 16 _{1 to} 16 ₁₆ . The porous layer 26 is a layer for transmitting the water generated in each storage space 16 to the inspection path 18. The porous layers 26A to 26E are members made of porous concrete having pores inside.

  Next, in order to construct the concrete pit 10 as described above, the bottom wall 11 and the side wall 12 are formed as outer walls in the outer wall forming step as shown in FIG. In this state, the upper wall 13 is not formed and the opening 21 is formed on the upper end side of the side wall 12. In addition, what is formed by the bottom wall 11 and the side wall 12 and has the opening 21 formed therein may be referred to as a "building 20" in the following description.

  By performing the wall forming step on the structure 20 as described above, the partition 14 and the porous layer 26 are formed. In the present specification, the “wall part” refers to a member of the concrete pit 10 for ensuring the strength as a structure and the hermeticity of the storage space 16. The “wall portion” may include the side wall 12 in addition to the partition 14. The "wall" is made of concrete, reinforcing bars, metal plates, or the like. However, the porous layer 26 is not included in the “wall portion”. In the present embodiment, the partition 14 corresponds to the "wall portion".

  The wall portion forming step includes a plate-shaped member arranging step of arranging the plate-shaped member 30 at the installation position of the partition 14 which is the wall portion. The “plate-shaped member” is not a member formed by pouring concrete at the construction site of the concrete pit 10 but a member formed in advance. At the construction site, the wall member can be formed by bringing in the plate-shaped member 30 formed in advance and installing it at the intended installation location. Further, in the concrete pit 10 by performing the wall forming step, at least a part of the wall forming the concrete pit 10 includes the plate member 30. The plate-shaped member 30 is not formed at the construction site, and the material is not particularly limited as long as it is preformed and can be conveyed. For example, the material of the plate-shaped member 30 may be composed of a reinforced concrete member (so-called precast member) that has been cast in advance, or may be composed of a metal plate such as iron. In this embodiment, a case where a precast member is used as the plate member 30 will be described as an example. Here, in the wall portion of the concrete pit 10 after completion, a portion (or the entire wall portion) formed by the plate-shaped member 30 is formed, but the user can ) Is composed of the plate-shaped member 30, is constructed by pouring concrete at the site, or is made of the same material. Specifically, the user can distinguish that the plate-shaped member 30 is used in terms of the concrete surface condition and the condition of the joints and joints.

  Further, in the plate-shaped member arranging step according to this embodiment, the assembly 40 having at least two surfaces intersecting with each other is arranged. That is, as shown in FIG. 5, the plurality of assemblies 40 are inserted into the structure 20 through the openings 21 from above. When arranging the assembly 40, the assembly 40 is hung by a heavy machine such as a crane to be transported and lowered to be arranged at a desired position.

  As shown in FIGS. 3 and 5, the assembly 40 includes, on at least one surface thereof, the plate-shaped member 30 arranged at the installation position of the partition 14 which is the wall portion 45. The plate-shaped member 30 of the assembly 40 constitutes one wall portion as a whole. It should be noted that the term “one wall portion” as used herein refers to the wall portion 45 that constitutes one surface of the four-direction surfaces that partition one storage space 16. Therefore, the state in which the plate-shaped member 30 "constitutes the entire one wall portion" means that one wall portion that partitions the storage space 16 is a single plate-shaped member that is integrally and seamlessly formed. It means a state of being composed of the member 30. The assembly 40 also includes the porous layer 26 having pores on at least one surface.

The configuration of the assembly 40 will be described in detail with reference to FIG. Further, for the sake of convenience of description, each assembly 40 forming the storage spaces 16 _{1 to} 16 ₁₆ is denoted by “40 ₁ to 40 ₁₆ ”. In the present embodiment, each assembly 40 has a plate-shaped member 30A that constitutes the wall portion 45 (intermediate partitions 14A, 14B, 14C) on the X axis direction positive side. However, in the assemblies 40 ₄ , 40 ₈ , 40 ₁₂ , 40 ₁₆ facing the side wall 12B on the positive side in the X-axis direction of the concrete pit 10, since the side wall 12B itself constitutes the wall portion on the positive side in the X-axis direction, The member 30A is not provided. Further, in the assemblies 40 ₁ , 40 ₅ , 40 ₉ , 40 ₁₃ facing the side wall 12A on the X axis direction negative side of the concrete pit 10, since the side wall 12A itself constitutes the wall portion 45 on the X axis direction positive side, No plate member is provided. With the above configuration, the wall portion 45 on the X-axis direction positive side of each storage space 16 other than the storage spaces 16 ₄ , 16 ₈ , 16 ₁₂ , 16 ₁₆ is configured by the plate-shaped member 30A of the corresponding assembly 40. To be done. The wall portion 45 on the X-axis direction positive side of the storage spaces 16 ₄ , 16 ₈ , 16 ₁₂ , 16 ₁₆ is configured by the side wall 12B. The wall portion 45 on the X axis direction negative side of each of the storage spaces 16 other than the storage spaces 16 ₁ , 16 ₅ , 16 ₉ and 16 ₁₃ is configured by the plate-shaped member 30A of the assembly 40 adjacent to the X axis direction negative side. It The assembly 40 adjacent to the negative side in the X-axis direction is, for example, the assembly 40 _{1 in} the storage space 16 ₂ . The wall portion 45 of the storage spaces 16 ₁ , 16 ₅ , 16 ₉ and 16 ₁₃ on the negative side in the X-axis direction is configured by the side wall 12A.

Further, each assembly 40 has a plate-shaped member 30B that constitutes a wall portion (intermediate partitions 14D, 14E, 14F) 45 on the Y axis direction positive side. However, in the assemblies 40 ₁₃ , 40 ₁₄ , 40 ₁₅ , 40 ₁₆ facing the side wall 12D on the positive side in the Y-axis direction of the concrete pit 10, since the side wall 12D itself constitutes the wall portion on the positive side in the Y-axis direction, The member 30B is not provided. Further, in the assemblies 40 ₁ , 40 ₂ , 40 ₃ , 40 ₄ facing the side wall 12C on the negative side in the Y-axis direction of the concrete pit 10, since the side wall 12C itself constitutes the wall portion 45 on the negative side in the Y-axis direction, No plate member is provided. With the above configuration, the wall portion 45 on the Y axis direction positive side of each storage space 16 other than the storage spaces 16 ₁₃ , 16 ₁₄ , 16 ₁₅ , 16 ₁₆ is formed by the plate-shaped member 30B of the corresponding assembly 40. To be done. The wall portion 45 on the Y axis direction positive side of the storage spaces 16 ₁₃ , 16 ₁₄ , 16 ₁₅ , 16 ₁₆ is configured by the side wall 12D. The wall portion 45 on the Y axis direction negative side of each of the storage spaces 16 other than the storage spaces 16 ₁ , 16 ₂ , 16 ₃ , and 16 ₄ is configured by the plate-shaped member 30B of the assembly 40 adjacent to the Y axis direction negative side. It The assembly 40 adjacent in the Y axis direction negative side, for example, is that the assembly 40 ₁ for the storage space 16 _5. The wall portion 45 on the Y axis direction negative side of the storage spaces 16 ₁ , 16 ₂ , 16 ₃ , 16 ₄ is configured by the side wall 12D.

Further, the assemblies 40 ₁ , 40 ₅ , 40 ₉ , 40 ₁₃ facing the side wall 12A on the negative side in the X-axis direction of the concrete pit 10 have a porous layer 26A covering the inner surface of the side wall 12A on the negative side in the X-axis direction. Have The assemblies 40 ₄ , 40 ₈ , 40 ₁₂ , 40 ₁₆ facing the side wall 12B on the X axis direction positive side of the concrete pit 10 have a porous layer 26B covering the inner surface of the side wall 12B. The assemblies 40 ₁ , 40 ₂ , 40 ₃ , 40 ₄ facing the sidewall 12C on the negative side in the Y-axis direction of the concrete pit 10 have a porous layer 26C covering the inner surface of the sidewall 12C on the negative side in the Y-axis direction. ing. The assembly _{40 13,} 40 _14, 40 15, _{40 16} facing the side wall 12D of the Y-axis direction positive side of the concrete pit 10 has a porous layer 26D that covers the inner surface of the side wall 12D. Further, all the assemblies 40 ₁ to 40 ₁₆ have a porous layer 26E that covers the upper surface of the bottom wall 11 (see also FIGS. 4 and 5).

Figure 6 is a perspective view of the assembly 40 ₁ out of the assembly shown in FIG. As mentioned above, the assembly 40 _1, X-axis direction positive side to the plate-like member 30A, Y-axis direction negative side of the surface in the plate-like member 30B, X-axis direction negative side of the surface a porous layer 26A, Y The surface on the axially negative side has a porous layer 26C, and the surface on the lower side has a porous layer 26E. Further, the upper surface of the assembly 40 ₁ is open. As shown in FIG. 6, the plate-shaped members 30A and 30B are not divided in any of the entire area in the height direction, the entire area in the width direction, and the entire area in the thickness direction, and thus one plate member is integrated. Is configured as. That is, the plate-shaped members 30A and 30B form a single wall 45. The plate-shaped member 30A and the plate-shaped member 30B are integrated at the corners connected to each other. That is, the plate-shaped member 30A and the plate-shaped member 30B are configured as one L-shaped member integrated with each other. However, the plate-shaped member 30A and the plate-shaped member 30B may be separated from each other and may be independent members. Further, the corner portions where the plate members 30A and 30B and the porous layers 26A, 26C and 26E are connected to each other are reinforced by the angle member 32. As described above, the assembly 40 ₁ may have a plate-like member 30 on at least one surface has a porous layer 26 on at least one surface. As shown in FIG. 3, the other assembly 40 also has the plate member 30 on at least one surface and the porous layer 26 on at least one surface. Therefore, the other assembly 40 also has the same structure as the assembly 40 ₁ shown in FIG.

  Next, the operation / effect of the concrete pit 10 of the radioactive waste burying facility according to the present embodiment will be described.

  In the method for manufacturing the concrete pit 10, the wall forming step of forming at least a part of the wall 45 forming the concrete pit 10 is a plate-like member arranging step of arranging the plate-like member 30 at the installation position of the wall 45. including. As described above, at least a part of the wall portions 45 that configure the concrete pit 10 has a configuration including the plate-shaped member 30 arranged at the installation position. Therefore, the wall portion 45 can be formed in a short time by using the plate-shaped member 30 formed in advance, as compared with the case where the entire wall portion 45 is formed by pouring concrete. From the above, the construction period can be shortened. For example, since it is not possible to construct a concrete pit outdoors in the cold season in winter and in the rainy season or typhoon season, the construction work can be completed early by shortening the construction period.

  In the plate member arranging step, the assembly 40 having at least two surfaces intersecting each other is arranged, and the assembly 40 includes the plate member 30 arranged at the installation position of the wall portion 45 on at least one surface. .. As described above, the assembly 40 including at least the plate-shaped member 30 and constructed to have at least two surfaces is prepared in advance, and the assembly 40 is simply arranged on the spot, so that the wall of the concrete pit 10 can be formed. The portion 45 can be formed. Therefore, the construction period can be further shortened.

  The plate-shaped member 30 of the assembly 40 constitutes one wall portion 45 as a whole. As a result, the entire wall portion 45 can be configured only by the plate-shaped member 30, so that the construction period can be shortened.

  At least one surface of the assembly 40 includes a porous layer 26 having pores. Thereby, the porous layer 26 can be easily configured.

  Further, in the concrete pit 10 of the radioactive waste burying facility 100 according to the present embodiment, at least a part of the wall portion 45 that constitutes the concrete pit 10 is configured to include the plate member 30.

  According to the concrete pit 10 of the radioactive waste burial facility 100, it is possible to obtain the same actions and effects as the method for manufacturing the concrete pit 10 of the radioactive waste burial facility 100 described above.

  The concrete pit 10 includes an assembly 40 having at least two surfaces intersecting with each other, and the assembly 40 includes a plate member 30 included in a wall portion 45 on at least one surface. As described above, the assembly 40 including at least the plate-shaped member 30 and constructed to have at least two surfaces is prepared in advance, and the assembly 40 is simply arranged on the spot, so that the wall of the concrete pit 10 can be formed. The portion 45 can be formed. Therefore, the construction period can be further shortened.

  The present invention is not limited to the above embodiment.

  For example, in the above-described embodiment, the plate-shaped members 30A and 30B are formed on the X-axis direction positive side and the Y-axis direction negative side of the assembly 40, but the plate members are formed on the X-axis direction negative side and the Y-axis direction negative side. The member 30 may be formed. Further, the side walls 12A, 12B, 12C, 12D may also be configured by plate members.

Further, for example, as shown in FIG. 7, the wall portion 45 may be configured by a combination of the plate-shaped member 30 of one assembly 40 and the plate-shaped member 30 of another assembly 40. Specifically, the thickness of the plate-shaped member 30A on the positive side in the X-axis direction of the assemblies 40 ₁ , 40 ₂ , 40 ₃ is set to half the thickness of the partition 14. The assemblies 40 ₂ , 40 ₃ , 40 ₄ have a plate-shaped member 30C on the X axis direction negative side. The thickness of the plate member 30C is set to half the thickness of the partition 14. Partition 14A in a wall portion 45 is composed of a plate-shaped member 30A of the assembly 40 _1, by the combination of the plate-like member 30C of the assembly 40 _2. Partition 14B in a wall portion 45 is composed of a plate-shaped member 30A of the assembly 40 _2, in combination with the plate-like member 30C of the assembly 40 _3. Partition 14C in a wall portion 45 is composed of a plate-shaped member 30A of the assembly 40 _3, in combination with the plate-like member 30C of the assembly 40 _4. The partitions 14D, 14E, and 14F are also configured by combining the plate-shaped members 30 of each assembly 40 in the same manner.

With such a configuration, the weight of the plate member 30 per one surface of the assembly 40 is reduced. Therefore, the deviation of the center of gravity in the assembly 40 can be reduced as compared to the case where the plate-shaped member 30 per one surface constitutes the entire wall portion (for example, the configuration of FIG. 5). Furthermore, since the plate-shaped member 30 per surface of one assembly 40 has a thickness half that of the wall portion, the other assembly 40 has the plate-shaped member 30 to supplement the thickness of the other half. Become. In this case, the other assembly 40 has the plate-shaped member 30 having a half thickness at the position where the plate-shaped member 30 was not provided in the configuration of FIG. That is, the number of surfaces of the other assembly 40 increases. By increasing the number of surfaces in this manner, the deviation of the center of gravity in the assembly 40 can be further reduced. Therefore, the balance of the assembly is improved when the assembly is transported. For example, in the configuration shown in FIG. 5, the assemblies 40 ₂ and 40 ₃ have the plate-shaped member 30A having the thickness of one partition 14 only on the positive side in the X-axis direction. Therefore, while the assemblies 40 ₂ and 40 ₃ have the heavy plate-shaped member 30A on the surface on the X axis direction positive side, nothing is provided on the surface on the X axis direction negative side. Therefore, when suspended during transportation, the centers of gravity of the assemblies 40 ₂ and 40 ₃ are biased to the positive side in the X-axis direction. On the other hand, the assemblies 40 ₂ and 40 ₃ shown in FIG. 7 have plate-shaped members 30A and 30C having a thickness half that of the partition 14 on both sides in the X-axis direction. That is, the weight of the plate-shaped member 30 per surface can be reduced, and the reduced plate-shaped member 30 can be arranged on both sides in the X-axis direction. Therefore, when the assemblies 40 ₂ and 40 ₃ are transported, the balance of the assemblies is improved.

  Moreover, you may employ | adopt the structure as shown in FIG. 8 and FIG. In the configurations shown in FIGS. 8 and 9, a gap is formed between the plate-shaped member 51 of one assembly 50 and the plate-shaped member 51 of the other assembly 50, and the filler 52 is placed in the gap. It is filled. Specifically, the assembly 50 has plate-shaped members 51 on all sides. Further, the assembly 50 has a scaffold 53 in a space surrounded by the plate member 51 (a space serving as a storage space). The plate member 51 may be made of reinforced concrete or may be made of a metal plate member such as iron.

  As shown in FIG. 9, the plate-shaped member 51 of one assembly 50 faces the plate-shaped member 51 of the other assembly 50 and is arranged so as to form a gap. The gap 52 is filled with the filler 52 and cured. Concrete or the like is adopted as the filler 52. As a result, the wall 55 is formed by the pair of plate-shaped members 51 and the cured filler 52. Note that, among the plate-shaped members 51 of the assembly 50, those that face each other with the scaffold 53 interposed therebetween may be connected to each other by a connecting rod 54. Thereby, the plate-shaped member 51 before being filled with the filler 52 can be supported. As described above, since the plate-shaped member 51 of the assembly 50 can function like the mold of the filler 52, it is possible to shorten the time for constructing the mold.

  In the above-described embodiment and modification, the wall portion is configured by disposing the assembly having the plurality of surfaces. Instead of this, one plate-shaped member may be arranged at a position corresponding to the wall portion. Further, one plate-shaped member may constitute the entire wall portion per sheet, but the plate-shaped member may constitute a part of the wall portion. According to such a configuration, since the plate-like member constitutes a part of the wall portion, the weight is lighter than that of the whole wall portion per sheet, and the work such as installation becomes easier. ..

  Specifically, in the configuration shown in FIG. 8 and FIG. 9 described above, the plate member 51 is not arranged in the state of the assembly 50, but is arranged as a single plate member 51 independent of other members. You may. In such a form, the plate member 51 constitutes a part of the wall portion 55 in the thickness direction. According to such a configuration, it is possible to obtain an effect that the weight for transportation is reduced. Note that the scaffolds 53 may be constructed in the accommodation space after the plate-shaped members 51 on the four sides of the accommodation space are arranged.

  The wall 55 is configured to include a plurality of plate-shaped members 51 facing each other in the thickness direction, and the gap between the plate-shaped members 51 is filled with the filler 52. This allows the plate-like member 51 to function like a mold for the filler 52, and thus the time for constructing the mold can be shortened.

  Further, as shown in FIG. 10, the plate member 61 may form a part of the wall portion 65 in the height direction. In the example shown in FIG. 10, the plate member 61 in which the wall portion is divided into a plurality of pieces in the height direction is used. A plurality of reinforcing bars 63 are arranged inside the plate-shaped member 61, and the reinforcing bars 63 are also exposed from the end face and the lower end face in the lateral direction. The plate-shaped members 61 are stacked upward. At the corner portions where the plate-shaped members 61 intersect, the reinforcing bars 63 intersect each other. The joint portion 64 is formed by filling the corner portion with mortar or the like. As described above, since the plate-shaped member 61 constitutes a part of the wall portion 65 in the height direction, it is possible to obtain the effect of reducing the weight of the transportation.

  Further, as shown in FIG. 11, the plate member 71 may constitute a part of the wall portion 75 in the lateral direction. In the example shown in FIG. 11, the plate member 71 configured as a part of the wall portion 75 in the lateral direction is used. A plurality of reinforcing bars 73 are arranged inside the plate-shaped member 71, and the reinforcing bars 73 are also exposed from the end faces in the lateral direction. The plate-shaped member 71 is arranged at a central position in the lateral direction of the wall portion 75. At the corners where the plate members 71 intersect, the reinforcing bars 73 intersect each other. At the corner portion, a joint portion 74 that indicates a reinforcing bar is formed. The space between the joint portion 74 and the plate member 71 is also filled with mortar or the like to form the filling portion 72. As described above, since the plate-shaped member 71 constitutes a part of the wall portion 75 in the lateral direction, the effect of reducing the weight during transportation and the fact that the parts are assembled in order from the bottom improves the balance during assembly. The effect can be obtained.

  10 ... Concrete pit, 12 ... Side wall (wall part), 14 ... Middle partition (wall part), 26 ... Porous layer, 30, 51, 61, 71 ... Plate member, 40, 50 ... Assembly, 45, 55, 65, 75 ... Walls, 100 ... Radioactive waste burial facility.

Claims (4)

A method for manufacturing a concrete pit of a radioactive waste burial facility,
Wall forming step of forming at least part of a wall portion constituting the concrete pit, seen including a plate-like member disposing step of disposing the plate member to the installation position of the wall portion,
In the plate member arranging step, an assembly having at least two surfaces intersecting with each other is arranged,
The assembly includes, on at least one surface, the plate-shaped member arranged at the installation position of the wall portion,
A method of manufacturing a concrete pit of a radioactive waste burial facility, comprising a porous layer having pores on at least one surface of the assembly . The method for manufacturing a concrete pit of a radioactive waste burial facility according to claim 1 , wherein the wall portion is configured by a combination of the plate member of one assembly and the plate member of another assembly. The radioactive substance according to claim 2 , wherein a gap is formed between the plate-shaped member of the one assembly and the plate-shaped member of the other assembly, and the gap is filled with a filler. Method for manufacturing concrete pits in waste burial facilities. A concrete pit of a radioactive waste burial facility,
At least a part of the wall portion constituting the concrete pit is configured to include a plate-shaped member ,
The concrete pit comprises an assembly having at least two sides intersecting each other,
The assembly includes, on at least one surface thereof, the plate-shaped member included in the wall portion,
A concrete pit for a radioactive waste burial facility comprising a porous layer having pores on at least one side of the assembly .

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