JP6132479B2 - Building basic structure - Google Patents

Description

  The present invention relates to a building foundation structure for erecting a building such as a reactor containment vessel on a foundation plate on the ground.

  One of the nuclear power plants is a pressurized water reactor. In this pressurized water reactor, light water is used as a reactor coolant and a neutron moderator, and high-temperature and high-pressure water that does not boil throughout the primary system is used. Water is sent to a steam generator to generate steam by heat exchange, and this steam is sent to a turbine generator to generate electricity.

  In a nuclear power plant having such a pressurized water reactor, the containment vessel is erected on a foundation plate laid on the ground, and the foundation plate has a seismic isolation structure. As a basic version having such a seismic isolation structure, for example, there are those described in Patent Documents 1 and 2 below. In the basic version of the building of the nuclear facility described in each patent document, a seismic isolation device is provided between the lower basic version provided on the ground and the upper basic version in which the reactor containment vessel is erected. .

  In such a nuclear power plant, if the foundation of the reactor containment vessel is inundated due to heavy rain, tsunami, river flooding, etc., there is a risk of hindering the operation of the seismic isolation device. Therefore, what is described in the following patent documents 3 and 4 as what waterproofs a seismic isolation apparatus, for example. The seismic isolation device described in each patent document has a waterproof cover around it.

JP 2011-095173 A JP 2011-163927 A Japanese Patent Laid-Open No. 11-061739 JP 2009-024863 A

  In general, a plurality of seismic isolation devices that support a building are provided at predetermined intervals in the horizontal direction between an upper base plate and a lower base plate. As with the conventional seismic isolation devices described above, if a waterproof cover is provided around each seismic isolation device, a large number of waterproof covers are required, which not only increases the manufacturing cost but also increases the construction time and the construction cost. Will also increase.

  This invention solves the subject mentioned above, and aims at providing the foundation structure of the building which enables reduction of manufacturing cost and construction cost.

  The foundation structure of the building of the present invention for achieving the above-mentioned object is a lower foundation plate provided on the ground, an upper foundation plate provided above the lower foundation plate and where the building is installed, and the upper foundation. A seismic isolation device having a seismic isolation structure arranged in a horizontal direction at a predetermined interval between a plate and the lower base version, and a waterproof cover that covers the plurality of seismic isolation structures. It is what.

  Therefore, a plurality of seismic isolation structures are horizontally arranged at predetermined intervals between the upper base plate and the lower base plate, and the waterproof cover covers the plurality of seismic isolation structures. Even when the surrounding area of the building is flooded due to flooding of the building, the waterproof cover prevents the seismic isolation device from being flooded, and the occurrence of functional failure of the seismic isolation device can be prevented. In addition, since the waterproof cover covers a plurality of seismic isolation structures, it is not necessary to provide a waterproof cover for each seismic isolation structure, and an increase in the manufacturing cost of the waterproof cover can be suppressed. An increase in the construction cost of the cover can be suppressed, and the manufacturing cost and construction cost can be reduced.

  In the foundation structure of the building of the present invention, the waterproof cover is provided so as to be deformable between the upper base plate and the lower base plate.

  Therefore, when the seismic isolation device allows relative displacement between the upper base plate and the lower base plate due to an earthquake, etc., the waterproof cover is deformed, so that the waterproof cover can properly infiltrate the seismic isolation device when it is inundated around the building. Can be prevented.

  In the basic structure of the building according to the present invention, the waterproof cover has flexibility.

  Therefore, when the seismic isolation device allows relative displacement between the upper base plate and the lower base plate due to an earthquake, etc., the waterproof cover has flexibility, so that the waterproof cover can flood the seismic isolation device when it is inundated around the building. Can be prevented appropriately.

  In the basic structure of the building of the present invention, the waterproof cover is configured by a plurality of covers being multilayered.

  Therefore, it is possible to ensure sufficient strength for the waterproof cover, and even if the periphery of the foundation plate is flooded due to heavy rain, tsunami, river flooding, etc., the waterproof cover can prevent the seismic isolation structure from being flooded. The waterproof cover can be prevented from being damaged by the collision of drifting objects that flow with water, and the durability can be improved.

  In the foundation structure of the building of the present invention, the seismic isolation device supports the upper base plate and the lower base plate so as to be relatively displaceable, and the waterproof cover is a relative member between the upper base plate and the lower base plate. It is characterized by having a deformation amount larger than the displacement amount.

  Therefore, when the seismic isolation device allows relative displacement between the upper base plate and the lower base plate due to an earthquake, etc., the waterproof cover will be appropriately deformed, so that the water isolation device can be properly submerged without damaging the waterproof cover. Can be prevented.

  In the foundation structure of a building according to the present invention, the waterproof cover connects an outer peripheral portion of the upper base plate and an outer peripheral portion of the lower base plate.

  Therefore, the structure of the waterproof cover can be simplified by disposing the waterproof cover between the upper base plate and the lower base plate.

  In the foundation structure of the building of the present invention, the lower foundation plate is installed in a recess having a predetermined depth with respect to the ground surface, and the waterproof cover connects the ground surface and the outer peripheral portion of the upper foundation plate. It is characterized by that.

  Accordingly, the waterproof cover is disposed between the ground surface and the outer peripheral portion of the upper base plate, so that the waterproof cover can prevent water from entering into the recess where the seismic isolation device is disposed, and intrusion of foreign matter. Can be prevented, and the durability of the seismic isolation device can be improved.

  The basic structure of the building according to the present invention is characterized in that a collision preventing member is provided outside the waterproof cover.

  Therefore, even if the periphery of the base plate is flooded due to heavy rain, tsunami, river flooding, etc., the waterproof cover can not only prevent the seismic isolation structure from being flooded, but also a waterproof cover for drifting objects that flows with water by the collision prevention member Can be prevented, and the waterproof cover can be prevented from being damaged to improve durability.

  In the basic structure of the building of the present invention, the waterproof cover divides the plurality of seismic isolation structures into a predetermined number of blocks and covers them.

  Therefore, when the waterproof cover divides a plurality of seismic isolation structures into a predetermined number of blocks and covers them, one of the plurality of blocks is damaged, and some of the seismic isolation structures are submerged and the function is reduced. However, since there is a seismic isolation structure of an undamaged block, a sound foundation version can be maintained by the undamaged seismic isolation structure without being submerged.

  According to the foundation structure of the building of the present invention, the lower foundation plate provided on the ground, the upper foundation plate provided above the lower foundation plate and the building is installed, and between the upper foundation plate and the lower foundation plate A seismic isolation device having a plurality of seismic isolation structures arranged at predetermined intervals in the horizontal direction and a waterproof cover for covering the plurality of seismic isolation structures are provided. The manufacturing cost and the construction cost can be reduced.

FIG. 1 is a schematic configuration diagram illustrating a nuclear power plant to which a building foundation structure according to a first embodiment of the present invention is applied. FIG. 2 is a schematic configuration diagram illustrating the foundation structure of the building according to the first embodiment. FIG. 3 is a schematic plan view illustrating the basic structure of the building according to the first embodiment. FIG. 4 is a cross-sectional view illustrating a waterproof seal mounting structure in a building foundation structure according to a second embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating a waterproof seal mounting structure in a building basic structure as a modification of the second embodiment. FIG. 6 is a cross-sectional view illustrating a waterproof seal mounting structure in a building basic structure as a modification of the second embodiment. FIG. 7 is a cross-sectional view illustrating a waterproof seal mounting structure in a building basic structure as a modification of the second embodiment. FIG. 8 is a cross-sectional view of a waterproof seal in the foundation structure of a building according to Example 3 of the present invention. FIG. 9 is a cross-sectional view of a waterproof seal in a building foundation structure as a modification of the third embodiment. FIG. 10: is a schematic block diagram showing the nuclear power plant to which the foundation structure of the building based on Example 4 of this invention is applied. FIG. 11 is a cross-sectional view illustrating a waterproof seal mounting structure in the building foundation structure of the fourth embodiment. FIG. 12 is a schematic plan view showing a foundation structure of a building according to the fifth embodiment of the present invention.

  Exemplary embodiments of a foundation structure for a building according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  FIG. 1 is a schematic configuration diagram illustrating a nuclear power plant to which a building foundation structure according to Embodiment 1 of the present invention is applied, FIG. 2 is a schematic configuration diagram illustrating a building foundation structure according to Embodiment 1, and FIG. It is a schematic plan view showing the basic structure of the building of Example 1. FIG.

  The nuclear reactor of Example 1 uses light water as a reactor coolant and a neutron moderator, and produces high-temperature and high-pressure water that does not boil over the entire core, and sends this high-temperature and high-pressure water to a steam generator to generate steam by heat exchange. This is a pressurized water reactor (PWR) that generates electricity by sending this steam to a turbine generator.

  In the nuclear power plant having the pressurized water reactor of the first embodiment, as shown in FIG. 1, the reactor containment vessel 11 stores therein the pressurized water reactor 12 and the steam generator 13. The nuclear reactor 12 and the steam generator 13 are connected via a high temperature side supply pipe 14 and a low temperature side supply pipe 15, and a pressurizer 16 is provided in the high temperature side supply pipe 14, and the low temperature side supply pipe is provided. A primary cooling water pump 17 is provided at 15. In this case, light water is used as a moderator and primary cooling water (cooling material), and the primary cooling system maintains a high pressure state of about 150 to 160 atm by the pressurizer 16 in order to suppress boiling of the primary cooling water in the core. You are in control.

  Accordingly, in the pressurized water reactor 12, light water is heated as the primary cooling water by the low-enriched uranium or MOX as the fuel (nuclear fuel), and the high temperature primary cooling water is maintained at a predetermined high pressure by the pressurizer 16. , And is sent to the steam generator 13 through the high temperature side supply pipe 14. In the steam generator 13, heat exchange is performed between the high-temperature and high-pressure primary cooling water and the secondary cooling water, and the cooled primary cooling water is returned to the pressurized water reactor 12 through the low-temperature side supply pipe 15. .

  The steam generator 13 is connected to a steam turbine 32 via a pipe 31 for supplying heated secondary cooling water, that is, steam, and a main steam isolation valve 33 is provided in the pipe 31. The steam turbine 32 includes a high-pressure turbine 34 and a low-pressure turbine 35, and a generator (power generation device) 36 is connected to the steam turbine 32. Further, the high pressure turbine 34 and the low pressure turbine 35 are provided with a moisture separation heater 37 therebetween, and a cooling water branch pipe 38 branched from the pipe 31 is connected to the moisture separation heater 37, while the high pressure turbine 34 and the moisture separation heater 37 are connected by a low-temperature reheat pipe 39, and the moisture separation heater 37 and the low-pressure turbine 35 are connected by a high-temperature reheat pipe 40.

  Further, the low-pressure turbine 35 of the steam turbine 32 includes a condenser 41. The condenser 41 is connected to a turbine bypass pipe 43 having a bypass valve 42 from the pipe 31, and is also supplied with cooling water (for example, , Seawater) is connected to a water intake pipe 44 and a drain pipe 45. The intake pipe 44 has a circulating water pump 46, and the other end portion thereof is disposed in the sea together with the drain pipe 45.

  The condenser 41 is connected to a pipe 47, and is connected to a condensate pump 48, a ground condenser 49, a condensate demineralizer 50, a condensate booster pump 51, and a low-pressure feed water heater 52. The piping 47 is connected to a deaerator 53 and is provided with a main feed water pump 54, a high-pressure feed water heater 55, and a main feed water control valve 56.

  Therefore, the steam generated by exchanging heat with the high-temperature and high-pressure primary cooling water in the steam generator 13 is sent to the steam turbine 32 (from the high-pressure turbine 34 to the low-pressure turbine 35) through the pipe 31. The turbine 32 is driven to generate power by the generator 36. At this time, the steam from the steam generator 13 drives the high-pressure turbine 34, and then the moisture contained in the steam is removed and heated by the moisture separation heater 37, and then the low-pressure turbine 35 is driven. Then, the steam that has driven the steam turbine 32 is cooled using seawater in the condenser 41 to become condensed water, and the ground condenser 49, the condensate demineralizer 50, the low pressure feed water heater 52, the deaerator 53, the high pressure It returns to the steam generator 13 through the feed water heater 55 or the like.

  As shown in FIGS. 2 and 3, the nuclear reactor power plant containment vessel 11 of the nuclear power plant configured in this way digs the ground 61 to a solid ground 62 such as a rock to form a recess 63, It is erected on a base plate 64 laid in the recess 63. As described above, the reactor containment vessel 11 accommodates the pressurized water reactor 12, the steam generator 13, the pressurizer 16, the primary cooling water pump 17, and the like.

  As shown in FIGS. 2 and 3, the base plate 64 is composed of a lower base plate 65, an upper base plate 66 and a seismic isolation device 67. The lower base plate 65 has, for example, a reinforced concrete structure (RC structure) in which a reinforcing bar is incorporated, and is laid on a ground surface 62 that is flatly formed in the concave portion 63. The retaining wall 68 is formed so that the surface (upper surface) is flat and is constructed in a rectangular shape or a rectangular shape.

  The upper foundation plate 66 has, for example, a reinforced concrete structure (RC structure) in which a reinforcing bar is incorporated, and the surface (upper surface) of the upper base plate 66 is substantially the same as that of the ground surface 61. It is constructed in a rectangular parallelepiped shape or a rectangular parallelepiped shape so that its height and the front surface and back surface (lower surface) are flat. The upper base plate 66 is provided with a plurality of space portions 69 for accommodating various devices. A reactor containment vessel 11 as a building is installed on the upper base plate 66.

  The seismic isolation device 67 is provided between the upper surface of the lower base plate 65 and the lower surface of the upper base plate 66. The seismic isolation device 67 is configured by arranging a plurality of seismic isolation structures 70 at predetermined intervals (preferably at equal intervals) in the horizontal direction. The seismic isolation structure 70 has, for example, a multi-layer seismic isolation structure in which disc-shaped rubber materials and disc-shaped steel plates are alternately stacked. Each seismic isolation structure 70 has a lower portion fixed to the upper surface of the lower base plate 65 and an upper portion fixed to the lower surface of the upper base plate 66.

  And in the basic structure of the building of Example 1, the waterproof cover 71 which coat | covers the some seismic isolation structure 70 which comprises the seismic isolation apparatus 67 from the outer side is provided. The waterproof cover 71 is provided so as to be deformable between the upper base plate 66 and the lower base plate 65 and has flexibility.

  Specifically, the seismic isolation device 67 supports the upper base plate 66 and the lower base plate 65 so as to be capable of relative displacement, and the waterproof cover 71 has a maximum relative displacement between the upper base plate 66 and the lower base plate 65. The amount of deformation is greater than the amount. Therefore, the waterproof cover 71 has a rectangular ring shape so as to be positioned on the outer peripheral side of the seismic isolation device 67 (the plurality of seismic isolation structures 70), and the upper end is connected to the outer peripheral lower surface of the upper base plate 66, and the lower end Is connected to the outer peripheral upper surface portion of the lower base plate 65. The waterproof cover 71 has a predetermined amount of slack as a deformation allowance between the upper base plate 66 and the lower base plate 65 when the upper base plate 66 and the lower base plate 65 are in an initial position facing each other vertically. It is secured. The upper base plate 66 is provided with a plurality of space portions 69 inside, and an operator in the space portion 69 moves downward from an opening (not shown), that is, the upper base plate 66 and the lower base plate 65. The seismic isolation structure 70 constituting the seismic isolation device 67 covered with the waterproof cover 71 can be maintained.

  Thus, in the foundation structure of the building of Example 1, the lower foundation plate 65 provided on the ground 62 and the upper foundation plate provided above the lower foundation plate 65 and provided with the reactor containment vessel 11 are installed. 66, a seismic isolation device 67 having a seismic isolation structure 70 arranged in a horizontal direction at a predetermined interval between the upper base plate 66 and the lower base plate 65, and a waterproof covering the plurality of seismic isolation structures 70 A cover 71 is provided.

  Therefore, even if the periphery of the reactor containment vessel 11 is inundated due to heavy rain, tsunami, river flooding, etc., the waterproof cover 71 prevents the seismic isolation device 67 from being inundated. Occurrence can be prevented. Further, since the waterproof cover 71 covers the plurality of seismic isolation structures 70, it is not necessary to provide a waterproof cover for each seismic isolation structure 70, and an increase in the manufacturing cost of the waterproof cover 71 can be suppressed. In addition, the sealing area can be reduced to prevent an increase in the construction cost of the waterproof cover 71, and as a result, the manufacturing cost and construction cost of the base plate 64 can be reduced. Furthermore, by providing the waterproof cover 71, it is not necessary to install a drainage device or the like, and an increase in installation cost in the base plate 64 can be prevented.

  In the foundation structure of the building according to the first embodiment, the waterproof cover 71 is deformable between the upper foundation plate 66 and the lower foundation plate 65, that is, has a flexible structure. Accordingly, when the seismic isolation device 67 allows relative displacement between the upper base plate 66 and the lower base plate 65 due to an earthquake or the like, the waterproof cover 71 is deformed. Inundation into the seismic device 67 can be prevented appropriately.

  In the basic structure of the building of the first embodiment, the seismic isolation device 67 supports the upper base plate 66 and the lower base plate 65 so as to be capable of relative displacement, and the waterproof cover 71 includes the upper base plate 66 and the lower base plate. It can be deformed larger than the maximum relative displacement amount with 65. Accordingly, when the seismic isolation device 67 allows relative displacement between the upper base plate 66 and the lower base plate 65 due to an earthquake or the like, the waterproof cover 71 is appropriately deformed, so that the waterproof cover 71 is not damaged and the seismic isolation device is not damaged. 67 flooding can be prevented appropriately.

  In the basic structure of the building according to the first embodiment, the waterproof cover 71 connects the outer peripheral lower surface 66 a of the upper base plate 66 and the outer peripheral upper surface 65 a of the lower base plate 65. Therefore, the structure of the waterproof cover 71 can be simplified.

  FIG. 4 is a cross-sectional view showing a waterproof seal mounting structure in a building foundation structure according to a second embodiment of the present invention, and FIGS. 5 to 7 are installation of a waterproof seal in a building foundation structure as a modification of the second embodiment. It is sectional drawing showing a structure. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  As shown in FIG. 4, the basic structure of the building of Example 2 is an upper basic plate 66 in which a lower basic plate 65 is disposed on the ground 62 and the reactor containment vessel 11 is installed above the lower basic plate 65. Are arranged, and a plurality of seismic isolation devices 67 having a seismic isolation structure 70 are disposed between the upper base plate 66 and the lower base plate 65 in a horizontal direction at a predetermined interval. The structure 70 is covered with a waterproof cover 72.

  The waterproof cover 72 is provided so as to be deformable between the upper base plate 66 and the lower base plate 65, has flexibility, and is larger than the maximum relative displacement amount between the upper base plate 66 and the lower base plate 65. It has a deformation amount. That is, the waterproof cover 72 has a rectangular ring shape so as to be positioned on the outer peripheral side of the seismic isolation device 67 (the plurality of seismic isolation structures 70), and there is a deformation margin between the upper base plate 66 and the lower base plate 65. As a margin, it has a slack portion 72a that secures a predetermined slack amount. The slack portion 72a has a semicircular cross-sectional shape that protrudes outward. Further, the waterproof cover 72 is formed with an upper end mounting portion 72b that is bent in a U shape from the upper end portion of the slack portion 72a, and a lower end mounting portion 72c that is bent in a U shape from the lower end portion of the slack portion 72a. ing.

  The waterproof cover 72 is fixed by a plurality of fastening bolts 73 with the upper end mounting portion 72b in close contact with the outer peripheral lower surface 66a of the upper base plate 66, and the lower end mounting portion 72c is in close contact with the outer peripheral upper surface portion 65a of the lower base plate 65. Then, it is fixed by a plurality of fastening bolts 74. In this case, a sealing material (not shown) is provided between the upper end mounting portion 72b of the waterproof cover 72 and the outer peripheral lower surface 66a of the upper base plate 66, and between the lower end mounting portion 72c and the outer peripheral upper surface portion 65a of the lower base plate 65. It is preferable to interpose.

  Thus, in the foundation structure of the building of Example 2, the seismic isolation device 67 having the plurality of seismic isolation structures 70 is provided between the upper base plate 66 and the lower base plate 65, and the plurality of A waterproof cover 72 for covering the seismic structure 70 is provided, and the upper end mounting portion 72b of the waterproof cover 72 is directly fixed to the outer peripheral lower surface 66a of the upper base plate 66 by the fastening bolt 73, while the lower end mounting portion 72c is fixed to the lower base plate 65. The outer peripheral upper surface portion 65a is directly fixed by fastening bolts 74. Therefore, since the waterproof cover 72 is directly connected to the upper base plate 66 and the lower base plate 65, the cost can be reduced.

  The shape of the waterproof cover 72 and the attachment structure to the upper base plate 66 and the lower base plate 65 are not limited to the above-described embodiments.

  For example, as shown in FIG. 5, a seismic isolation device 67 having a seismic isolation structure 70 arranged in a horizontal direction at a predetermined interval between an upper base plate 66 and a lower base plate 65 is interposed. A waterproof cover 75 that covers the seismic isolation structure 70 is provided.

  The waterproof cover 75 has a rectangular ring shape so as to be positioned on the outer peripheral side of the seismic isolation device 67 (the plurality of seismic isolation structures 70), and as a deformation allowance between the upper base plate 66 and the lower base plate 65. A slack portion 75a having a semicircular cross section that secures a predetermined slack amount is provided. Further, the waterproof cover 75 is formed with an upper end attachment portion 75b that is bent in an L shape from the upper end portion of the slack portion 75a, and a lower end attachment portion 75c that is bent in an L shape from the lower end portion of the slack portion 75a. ing. The upper base plate 66 is fixed by being embedded in the outer peripheral lower surface 66a so that a ring-shaped attachment plate 76 protrudes downward, while the lower base plate 65 has a ring shape on the outer peripheral upper surface portion 65a. The mounting plate 77 is embedded and fixed so as to protrude upward.

  The waterproof cover 75 is fixed with a plurality of fastening bolts 78 with the upper end mounting portion 75 b in close contact with the mounting plate 76, and fixed with the plurality of fastening bolts 79 with the lower end mounting portion 75 c in close contact with the mounting plate 77. . In this case, a sealing material (not shown) is preferably interposed between the upper end mounting portion 75 b and the mounting plate 76 of the waterproof cover 75 and between the lower end mounting portion 75 c and the mounting plate 77.

  In addition, as shown in FIG. 6, a seismic isolation device 67 having a seismic isolation structure 70 arranged in a horizontal direction at a predetermined interval is interposed between the upper base plate 66 and the lower base plate 65, A waterproof cover 81 that covers the seismic isolation structure 70 is provided.

  The waterproof cover 81 has a rectangular ring shape so as to be positioned on the outer peripheral side of the seismic isolation device 67 (the plurality of seismic isolation structures 70), and as a deformation allowance between the upper base plate 66 and the lower base plate 65. It has a slack portion 81a that secures a predetermined slack amount. The slack portion 81a has a semicircular cross-sectional shape that protrudes inward. In addition, the waterproof cover 81 is formed with an upper end attachment portion 81b that is bent in an L shape from the upper end portion of the slack portion 81a, and a lower end attachment portion 81c that is bent in an L shape from the lower end portion of the slack portion 81a. ing. The upper base plate 66 has a mounting plate 82 having an L-shaped cross-section on the outer peripheral lower surface 66a fixed by a fixing bolt 83, while the lower base plate 65 is ring-shaped on the outer peripheral upper surface portion 65a with an L-shaped cross section. A mounting plate 84 having a shape is fixed by a fixing bolt 85.

  The waterproof cover 81 is fixed by a plurality of fastening bolts 86 with the upper end mounting portion 81 b in close contact with the mounting plate 82, and fixed by the plurality of fastening bolts 87 with the lower end mounting portion 81 c in close contact with the mounting plate 84. . In this case, between the outer peripheral lower surface 66a and the mounting plate 82, between the outer peripheral upper surface portion 65a and the mounting plate 84, between the upper end mounting portion 81b and the mounting plate 82, and between the lower end mounting portion 81c and the mounting plate 84. It is preferable to interpose a sealing material (not shown).

  In this way, the seismic isolation device 67 having the plurality of seismic isolation structures 70 is provided between the upper base version 66 and the lower base version 65, and waterproof covers 75 and 81 covering the plurality of seismic isolation structures 70 are provided. The upper end mounting portions 75b and 81b of the waterproof covers 75 and 81 are fixed to the mounting plates 76 and 82 of the upper base plate 66 by fastening bolts 78 and 86, while the lower end mounting portions 75c and 81c are mounted to the lower base plate 65. The plates 77 and 84 are fixed with fastening bolts 79 and 87.

  Accordingly, since the waterproof covers 75 and 81 are connected to the upper base plate 66 and the lower base plate 65 through the mounting plates 76, 77, 82 and 84, the structure of the waterproof covers 75 and 81 can be simplified. Installation can be performed easily. Further, the connection strength between the upper end mounting portions 75b and 81b and the lower end mounting portions 75c and 81c of the waterproof covers 75 and 81 and the mounting plates 76, 77, 82 and 84 can be increased, and the durability of the waterproof covers 75 and 81 can be increased. Can be improved. Further, since the slack portion 81a of the waterproof cover 82 projects inward, contact with the waterproof cover 82 from the outside can be suppressed, damage to the waterproof cover 82 can be prevented, and durability can be improved.

  Moreover, as shown in FIG. 7, the waterproof cover 81 has the same configuration as described above. In the upper base plate 66, a mounting plate 88 having a ring shape is fixed to the outer peripheral side surface portion 66b by a fixing bolt 89, while the lower base plate 65 is a mounting plate 84 having an L-shaped cross section in the outer peripheral upper surface portion 65a. Is fixed by a fixing bolt 85. The waterproof cover 81 is fixed by a plurality of fastening bolts 86 with an upper end mounting portion 81 b in close contact with the mounting plate 88, and is fixed by a plurality of fastening bolts 87 with the lower end mounting portion 81 c in close contact with the mounting plate 84. .

  In this case, the mounting plate 88 is fixed to the outer peripheral side surface portion 66b of the upper base plate 66 by the fixing bolt 89, while the lower end portion hangs down and extends to the vicinity of the mounting plate 84. It functions as a collision prevention member provided on the outer side of 81.

  In this way, the seismic isolation device 67 having a plurality of seismic isolation structures 70 is provided between the upper base version 66 and the lower base version 65, and a waterproof cover 81 that covers the plurality of seismic isolation structures 70 is provided, The upper end mounting portion 81c of the waterproof cover 81 is fixed to the mounting plate 82 of the upper base plate 66 by fastening bolts 86, while the lower end mounting portion 81b is fixed to the mounting plate 84 of the lower base plate 65 by fastening bolts 87, and the mounting plate 88 is fixed. Is extended to the vicinity of the mounting plate 84. Therefore, by making the mounting plate 88 function as a collision preventing member for the waterproof cover 81, the waterproof cover 81 prevents the seismic isolation structure 70 from being flooded even if the periphery of the base plate is flooded due to heavy rain, tsunami, river flooding, or the like. In addition to being able to do this, the mounting plate 88 prevents a drifting substance (for example, rubble) that flows with water from colliding with the waterproof cover 81, thereby preventing damage to the waterproof cover 81 and improving durability. it can.

  FIG. 8 is a cross-sectional view of the waterproof seal in the building foundation structure according to the third embodiment of the present invention, and FIG. 9 is a cross-sectional view of the waterproof seal in the building foundation structure as a modification of the third embodiment. The basic structure of the basic structure of the building of the present embodiment is substantially the same structure as that of the above-described first embodiment, and a member having the same function as that of the above-described embodiment while being described with reference to FIG. Are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 2, the basic structure of the building of Example 3 is an upper basic plate 66 in which a lower basic plate 65 is disposed on the ground 62 and the reactor containment vessel 11 is installed above the lower basic plate 65. Are arranged, and a plurality of seismic isolation devices 67 having a seismic isolation structure 70 are disposed between the upper base plate 66 and the lower base plate 65 in a horizontal direction at a predetermined interval. The structure 70 is covered with a waterproof cover.

  In Example 3, as shown in FIG. 8, the waterproof cover 91 is formed of a rubber-based member having flexibility, and a predetermined thickness is secured. The waterproof cover 91 has a slack portion 91a, an upper end attachment portion 91b, and a lower end attachment portion 91c. The waterproof cover 91 is preferably multi-layered by attaching a similar waterproof cover 91A to the inside of the waterproof cover 91 as shown by a two-dot chain line in FIG.

  Further, as shown in FIG. 9, the waterproof cover 92 is multi-layered by sandwiching a high-strength cover 95 between two covers 93 and 94 formed of a flexible rubber-based member. . In this case, the high-strength cover 95 is preferably formed of a deformable metal fiber, carbon fiber, aramid fiber, or the like.

  In the case where the waterproof covers 91 and 92 are configured to be multilayered, the number is not limited to two, and may be three or more.

  As described above, in the basic structure of the building according to the third embodiment, the waterproof cover 91 is thickened or multilayered, and the waterproof cover 92 is sandwiched between the covers 93 and 94 with the high-strength cover 95 interposed therebetween. Multi-layered. Accordingly, it is possible to ensure sufficient strength for the waterproof covers 91 and 92, and even if the periphery of the base plate is flooded due to heavy rain, tsunami, river flooding, etc., the waterproof covers 91 and 92 flood the seismic isolation structure 70. Can be prevented, and the waterproof covers 91 and 92 can be prevented from being damaged by the collision of the drifting objects flowing with the water, so that the durability can be improved.

  FIG. 10 is a schematic configuration diagram showing a nuclear power plant to which a building foundation structure according to a fourth embodiment of the present invention is applied, and FIG. 11 is a cross section showing a waterproof seal mounting structure in the building foundation structure of the fourth embodiment. FIG. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  As shown in FIGS. 10 and 11, the basic structure of the building of Example 4 is an upper part in which a lower foundation plate 65 is disposed on the ground 62 and the reactor containment vessel 11 is installed above the lower foundation plate 65. A base plate 66 is arranged, and a base isolation device 67 having a base isolation structure 70 arranged between the upper base plate 66 and the lower base plate 65 at a predetermined interval in the horizontal direction is interposed. The seismic isolation structure 70 is covered with a waterproof cover 101.

  The waterproof cover 101 is provided so as to be deformable between the upper base plate 66 and the lower base plate 65, has flexibility, and is larger than the maximum relative displacement amount between the upper base plate 66 and the lower base plate 65. It has a deformation amount. That is, the waterproof cover 101 has a rectangular ring shape so as to be positioned on the outer peripheral side of the seismic isolation device 67 (the plurality of seismic isolation structures 70), and there is a deformation margin between the upper base plate 66 and the lower base plate 65. A slack portion 101a that secures a predetermined slack amount as a margin is provided. The slack portion 101a has a semicircular cross-sectional shape that protrudes upward. The waterproof cover 101 has an inner peripheral attachment portion 101b that is bent in an L shape from the inner peripheral portion of the slack portion 101a, and an outer peripheral attachment portion 101c that is bent in an L shape from the outer peripheral portion of the slack portion 101a. Is formed.

  The waterproof cover 101 is fixed by a plurality of fastening bolts 102 with the inner peripheral attachment portion 101 b in close contact with the outer peripheral upper surface portion 66 c of the upper basic plate 66, and the outer peripheral attachment portion 101 c is the upper surface of the retaining wall 68 in the lower basic plate 65. A plurality of fastening bolts 103 are fixed in close contact with the portion (ground surface) 68a. In this case, a sealing material (not shown) is interposed between the inner peripheral mounting portion 101 b of the waterproof cover 101 and the outer peripheral upper surface portion 66 c of the upper base plate 66 and between the outer peripheral mounting portion 101 c and the upper surface portion 68 a of the retaining wall 68. It is preferable to wear.

  Although the outer peripheral mounting portion 101c of the waterproof cover 101 is fixed to the upper surface portion 68a of the retaining wall 68 in the lower base plate 65, it may be fixed to the inner side of the retaining wall 68, or the upper surface portion 68a of the retaining wall 68. It may be fixed to the ground 61 that is continuous to the ground.

  As described above, in the foundation structure of the building of Example 4, the seismic isolation device 67 having the plurality of seismic isolation structures 70 is provided between the upper base plate 66 and the lower base plate 65, and A waterproof cover 101 that covers the seismic structure 70 is provided, and the inner peripheral mounting portion 101b of the waterproof cover 101 is fixed to the outer peripheral upper surface portion 66c of the upper base plate 66 by the fastening bolt 102, while the outer peripheral mounting portion 101c is fixed to the lower base plate 65. Are fixed to the upper surface portion 68 a of the retaining wall 68 by fastening bolts 103.

  Accordingly, the waterproof cover 101 is disposed between the retaining wall 68 (the ground surface 61) and the outer peripheral upper surface portion 66c of the upper base plate 66, so that the waterproof cover 101 enters the recess 63 in which the seismic isolation device 67 is disposed. Inundation can be prevented, foreign matter can be prevented from entering, and the durability of the seismic isolation device 67 can be improved.

  FIG. 12 is a schematic plan view showing a foundation structure of a building according to the fifth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  As shown in FIG. 12, the basic structure of the building of Example 5 is a seismic isolation device having a plurality of base isolation structures 70 arranged at predetermined intervals in the horizontal direction between the upper base plate 66 and the lower base plate 65. 67 is interposed, and a waterproof cover 111 that covers the plurality of seismic isolation structures 70 from the outside is provided.

  The waterproof cover 111 is provided so as to be deformable between the upper base plate 66 and the lower base plate 65, has flexibility, and is larger than the maximum relative displacement amount between the upper base plate 66 and the lower base plate 65. It has a deformation amount. The waterproof cover 111 covers a plurality of seismic isolation structures 70 by dividing them into a predetermined number of blocks (regions).

  That is, the waterproof cover 111 includes a ring-shaped frame body 112 that covers the outer sides of the plurality of seismic isolation structures 70, and a vertical portion that divides the inside of the frame body 112 in the horizontal direction (left-right direction in FIG. 12). A frame 113 and a horizontal frame 114 that divides the inside of the frame body 112 into three in the vertical direction (vertical direction in FIG. 12) are provided. Therefore, the waterproof cover 111 is divided into nine regions A, B, C, D, E, F, G, H, and I by the two vertical frames 113 and the two horizontal frames 114 in the frame body 112. In this case, the same number (16 in this embodiment) of the seismic isolation structures 70 is accommodated in each of the regions A, B, C, D, E, F, G, H, and I.

  The waterproof cover 111 divides 144 seismic isolation structures 70 into nine regions A, B, C, D, E, F, G, H, and I, and each of the 16 seismic isolation structures 70. The number of seismic isolation structures 70, the number of regions A, B, C, D, E, F, G, H, I, the regions A, B, C, D, E, F, G, H , I is not limited to the number of seismic isolation structures 70, and the number of seismic isolation structures 70 in each region A, B, C, D, E, F, G, H, I is not the same. May be.

  As described above, in the foundation structure of the building of Example 5, the seismic isolation device 67 having the plurality of seismic isolation structures 70 is provided between the upper base plate 66 and the lower base plate 65, and A waterproof cover 111 that covers the seismic structure 70 is provided, and the waterproof cover 111 includes a plurality of seismic isolation structures 70 in a predetermined number of blocks (areas A, B, C, D, E, F, G, H, and I). It is divided and coated.

  Therefore, any of the plurality of regions A, B, C, D, E, F, G, H, and I in the waterproof cover 111 is damaged, and a part of the seismic isolation structure 70 is submerged and the function is deteriorated. Even if the area | region which is not damaged remains, the seismic isolation structure 70 which is not damaged without being submerged can be ensured, and the healthy foundation 64 can be maintained.

  In the above-described embodiment, the amount of deformation larger than the maximum relative displacement amount between the upper base plate 66 and the lower base plate 65 is ensured by providing a slack portion having a semicircular cross-sectional shape in the waterproof cover. It is not limited to this shape, For example, it is good also as a zigzag shape (bellows shape) etc. which protrude alternately on the outer side and inner side.

  In the above-described embodiments, the basic structure of the building of the present invention is applied to a pressurized water reactor, but it can also be applied to a boiling water reactor (BWR), and if it is a light water reactor, It may be applied to any nuclear reactor. Furthermore, in the embodiment described above, the building is a reactor containment vessel, but it may be a general building such as a building or a tower.

11 Reactor containment vessel (building)
DESCRIPTION OF SYMBOLS 12 Pressurized water reactor 13 Steam generator 61 The ground 62 The ground 63 The recessed part 64 The base plate 65 The lower base plate 66 The upper base plate 67 The base isolation device 70 The base isolation structure 71,72,75,81,91,92,101,111 Waterproof cover 88 Mounting plate (collision prevention member)

Claims (9)

Lower base version provided on the ground,
An upper foundation plate provided above the lower foundation plate and having a space that can be moved through an opening in an area between the lower foundation plate and a building is installed;
A seismic isolation device having a seismic isolation structure arranged in a horizontal direction at a predetermined interval between the upper base version and the lower base version;
A waterproof cover having a slack portion covering the plurality of seismic isolation structures and having a semicircular cross-sectional shape protruding outward or inward;
The basic structure of the building characterized by comprising.
  The foundation structure of a building according to claim 1, wherein the waterproof cover is provided so as to be deformable between the upper base plate and the lower base plate.   The foundation structure of a building according to claim 1, wherein the waterproof cover has flexibility.   The building waterproof structure according to any one of claims 1 to 3, wherein the waterproof cover includes a plurality of covers.   The seismic isolation device supports the upper base plate and the lower base plate so as to be capable of relative displacement, and the waterproof cover has a deformation amount larger than a relative displacement amount between the upper base plate and the lower base plate. The foundation structure of a building according to any one of claims 1 to 4.   The building waterproof structure according to any one of claims 1 to 5, wherein the waterproof cover connects an outer peripheral portion of the upper base plate and an outer peripheral portion of the lower base plate.   The lower base plate is installed in a recess having a predetermined depth with respect to the ground surface, and the waterproof cover connects the ground surface and an outer peripheral portion of the upper base plate. 5. The basic structure of the building according to any one of 5 above.   The building foundation structure according to any one of claims 1 to 7, wherein a collision preventing member is provided outside the waterproof cover.   The building waterproof structure according to any one of claims 1 to 8, wherein the waterproof cover covers the plurality of seismic isolation structures in a predetermined number of blocks.

Images