JP2014223558A - Bottom slab structure of waste storage facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottom slab structure of a waste storage facility capable of further strongly and surely preventing water leakage.SOLUTION: The bottom slab structure of the waste storage facility comprises bottom slab concrete 20 for closing a lid of a bottom part of the waste storage facility integrally with a vertical wall 10, an upper side first waterproof structure 21 of the bottom slab concrete and a lower side second waterproof structure 22. The first waterproof structure 21 is formed by laminating waterproof units 211, 212, etc. constituted of impervious sheets 211X, 212X, etc. and protective mats 211Y, 212Y, etc. for covering its upper-lower parts and crushed stones 210a, 210b. etc. laid on it over a plurality of layers. The second waterproof structure 22 is constituted of a waterproof unit 220 and crushed stones 220a and 220b laid on its upper-lower parts, and the waterproof unit 220 comprises a first flange part 221 vertically standing on its outer peripheral edge and a second flange part 222 extending in the horizontal direction to the vertical wall 10 from the first flange part 221.

Description

  The present invention relates to a bottom plate structure of a waste storage facility such as an intermediate processing facility for storing waste.

  Conventionally, as this type of bottom plate structure, there is the following Patent Document 1 by the present applicant. Such a bottom plate structure has a structure in which the bottom of the final disposal site is covered with a water shielding sheet and drainage pipes are provided above and below it.

  The drain pipe on the upper side of the water shielding sheet is for collecting rainwater that has fallen in the open type (no roof) final disposal site. It is verified that the water held in the disposal site including rainwater is not leaking from the water sheet.

Japanese Patent No. 4317260

  Here, the applicant of the present application studied in earnest research and studies to realize a stronger bottom plate structure and a higher level of safety performance to prevent water leakage even in a waste storage facility.

  In view of this background, an object of the present invention is to provide a bottom plate structure of a waste storage facility that is stronger and can reliably prevent water leakage.

The bottom plate structure of the waste storage facility of the first invention is a bottom plate structure of a waste storage facility for storing waste,
Bottom slab concrete that closes the bottom of the waste storage facility integrally with a vertical wall made of concrete standing on the outer periphery of the waste storage facility;
A first waterproof in which a waterproof unit composed of a water shielding sheet and a protective mat covering the top and bottom of the water shielding sheet and a crushed stone laid on the waterproof unit are laminated on the bottom slab concrete in a plurality of layers. A structure,
Under the bottom slab concrete, the waterproof unit and a crushed stone laid on the waterproof unit, a second waterproof structure covering the lower surface of the bottom slab concrete and the entire lower end of the vertical wall;
A perforated water collecting pipe disposed at predetermined intervals on the crushed stone of the second waterproof structure,
The second waterproof structure has a first flange portion that rises perpendicularly to the outer peripheral edge thereof, and a second flange portion that extends in a horizontal direction from the first flange portion to the vertical wall, and is connected to the water collecting pipe. Inundation from outside the waste storage facility is blocked.

  According to the bottom plate structure of the waste storage facility of the first invention, the bottom plate is made of concrete integrated with the vertical wall, so that a stronger bottom plate can be realized.

  In addition, on the bottom slab concrete, water leakage is ensured by providing a first waterproof structure in which a water-proof sheet and a plurality of waterproof units composed of protective mats covering the top and bottom of the water-proof sheet are arranged via crushed stone. Can be prevented.

  At this time, by disposing the crushed stone on the waterproof unit in the first waterproof structure, the load of the stored waste can be prevented from being applied to the waterproof unit immediately below and dispersed. Therefore, the load on the waterproof unit can be reduced, and the waterproof unit is not damaged.

  Furthermore, the bottom slab concrete is provided with a second waterproof structure in which the waterproof unit is disposed through crushed stone so as to cover the entire lower part of the waste storage facility. Even in the case of occurrence of water leakage, since the second waterproof structure is provided in addition to the first waterproof structure, water leakage can be more reliably prevented.

  Here, the crushed stone of the second waterproof structure is provided with a perforated water collecting pipe, and the first ridge part is provided so as to block the inflow of rainwater or the like from the waste storage facility to the water collecting pipe. And since the 2nd collar part is provided, the presence or absence of water leakage can be determined reliably by monitoring a water collecting pipe.

  Thus, according to the bottom slab structure of the waste storage facility of the first invention, it is possible to realize a stronger bottom slab structure and a higher level of safety performance to prevent water leakage.

  Note that the waste in the present invention includes hazardous waste containing radioactive substances and hazardous waste that does not contain radioactive substances and is highly toxic and needs to be managed.

  Examples of hazardous waste containing radioactive materials include ion-exchange resin (powder used as a filter medium for filtering core cooling water) regularly discharged from nuclear facilities such as nuclear power plants. This includes waste such as debris that is generated in the event of a nuclear power plant accident. In addition, hazardous waste that does not contain radioactive materials and is highly toxic and requires management includes waste containing hazardous heavy metals (lead, arsenic, chromium, mercury, cadmium and selenium).

The bottom slab structure of the waste storage facility of the second invention is the first invention,
The water collecting pipe is arranged in a mesh shape inclined downward from the center to the outer peripheral direction in the second waterproof structure, and an inspection pipe that communicates with the water collecting pipe and extends in the vertical direction penetrates the second flange portion at the outer peripheral position. It is provided as follows.

  According to the bottom slab structure of the waste storage facility of the second invention, as described above, the presence or absence of water leakage can be reliably determined by monitoring the water collecting pipe, and the water collecting pipe is inclined downward from the center toward the outer periphery. By arranging in a mesh shape, if there is water leakage in the water collection pipe (at the outer peripheral position of the waste storage facility), it can be detected by an inspection pipe provided to penetrate the second collar.

  At this time, by associating the detected part and the non-detected part of the water leak with the paths of these water collecting pipes, the part where the malfunction occurs can be specified, and a quick repair treatment or the like can be performed.

  In addition, although the detection of water leakage cannot be performed by the first waterproof structure and the bottom slab concrete, even if water leakage is detected, water leakage is prevented by the second waterproof structure.

  Thus, according to the bottom plate structure of the waste storage facility of the second invention, it is possible to realize a higher level of safety performance that prevents water leakage while realizing a stronger bottom plate structure.

The bottom plate structure of the waste storage facility of the third invention is the first or second invention,
The roof part is formed so that the whole upper end part side of the said vertical wall may be covered.

  According to the bottom slab structure of the waste storage facility of the third invention, the waste storage facility is a so-called closed-type waste storage facility with a roof, so that rainwater from directly above the waste storage facility can be obtained. No intrusion. For this reason, it is not necessary to treat the retained water in the disposal site, and the water collecting pipe can be used for monitoring intrusion of rainwater or the like from outside the waste storage facility.

  Thus, according to the bottom slab structure of the waste storage facility of the third invention, it is possible to achieve a higher level of safety performance in the waste storage facility.

  A bottom slab structure of a waste storage facility according to a fourth aspect of the present invention includes, in the first or second aspect, a perforated storm water collecting pipe disposed at predetermined intervals on the crushed stone in the uppermost layer of the first waterproof structure. It is characterized by that.

  According to the bottom slab structure of the waste storage facility of the fourth invention, for example, even when the waste storage facility is a so-called open type waste storage facility without a roof, the top crushed stone of the first waterproof structure By providing the rainwater collecting pipe, the water retained in the waste storage facility can be treated via the rainwater collecting pipe.

  Furthermore, since the water retained in the waste storage facility is not leaked by the first waterproof structure and the bottom slab concrete, the water collection pipe can be used mainly for monitoring the intrusion of rainwater from outside the waste storage facility, Secondary, it can be used as detection of water leakage.

  Thus, according to the bottom slab structure of the waste storage facility of the fourth invention, it is possible to achieve a higher level of safety performance in the waste storage facility.

Sectional drawing which shows the outline | summary of the bottom plate structure and vertical wall structure in a waste storage facility. Explanatory drawing which shows the detail of the bottom plate structure and vertical wall structure of FIG. Explanatory drawing which shows arrangement | positioning of the water collection pipe | tube and test | inspection pipe | tube of FIG.

  As an embodiment of the present invention, a bottom plate structure and a vertical wall structure in a waste storage facility will be described.

  As shown in FIGS. 1 and 2, the waste storage facility according to the present embodiment includes a concrete vertical wall 10 erected on the outer periphery of the waste storage facility, and the vertical wall 10 continuously in the horizontal direction. The bottom slab concrete 20 which closes the bottom part of a waste storage facility, the roof part 30 provided so that the whole upper end part side of the vertical wall 10 may be covered, and the approach path 40 are provided.

  First, the vertical wall 10 includes an inner side waterproof structure 110 and a covering structure 120 on its inner side.

  The inner side waterproof structure 110 has a structure in which a plurality of protective mats 110Y that cover and protect the waterproof sheet 110X and the surface of the waterproof sheet 110X are stacked. Specifically, the thickness of the water shielding sheet 110X is, for example, 1.5 mm, and the thickness of the protective mat 110Y is, for example, 20 mm.

  The covering structure 120 is composed of urethane 121 covered with the water shielding sheet 110 </ b> X exposed on the surface of the inner waterproof structure 110, and a nonflammable spray material 122 sprayed on the surface of the urethane 121.

  Specifically, the urethane 121 is hard foamed urethane, and is coated on the surface of the water shielding sheet 110X as a layer of, for example, 30 mm by spraying. Moreover, the nonflammable spray material 122 protects the surface of the urethane 121, and the thickness thereof is, for example, 4 mm.

  On the other hand, the vertical wall 10 is erected and arranged so that the outer surface thereof is almost exposed to the ground. That is, it is installed upright so that the lowermost surface for storing waste is equal to the ground surface. The relationship between the lowermost surface for storing waste and the ground surface will be described in detail later.

  Next, the bottom slab concrete 20 includes a first waterproof structure 21 on the upper side and a second waterproof structure 22 on the lower side.

  The first waterproof structure 21 has a configuration (three-layer structure) in which waterproof units 211, 212, and 213 and single-grained crushed stones 210a, 210b, and 210c laid thereon are stacked on each other.

  The uppermost waterproof unit 211 has a structure in which a plurality of (two in this embodiment) protective mats 211Y for covering and protecting the waterproof sheet 211X and the upper and lower sides thereof are laminated. A crushed stone 210a is laid on the upper side of the uppermost waterproof unit 211, and a crushed stone 210b is laid on the lower side. In addition, the upper surface of the crushed stone 210a is the lowermost surface for storing waste.

  The waterproof unit 212 of the intermediate layer includes a water shielding sheet 212X and protective mats 212Y and 212Y that cover and protect the waterproof sheet 212X. A crushed stone 210b is laid on the upper side of the waterproof unit 212 of the intermediate layer, and a crushed stone 210c is laid on the lower side.

  The lower waterproof unit 213 has the same configuration as that of the intermediate layer 212, and a crushed stone 210 c is laid on the upper side, and the lower side is in contact with the bottom slab concrete 20.

  Here, by placing the crushed stones 210a, 210b, and 210c on the waterproof units 211, 212, and 213, respectively, the load of stored waste is prevented from being applied to the waterproof units 211, 212, and 213 directly below. Can be dispersed. Therefore, the load on the waterproof units 211, 212, and 213 can be reduced, and the waterproof unit is not damaged. Furthermore, the load on the bottom slab concrete 20 that comes into contact with the lower waterproof unit 213 can also be reduced.

  Note that the inner side waterproof structure 110 provided on the inner side of the vertical wall 10 and the uppermost waterproof unit 211, the intermediate waterproof unit 212, and the lower waterproof unit 213 maintain the waterproof performance. It is connected to the. Supplementally, all of these water shielding sheets and protective mats have the same specifications.

  Next, the second waterproof structure 22 (corresponding to the bottom waterproof structure of the present invention) includes a waterproof unit 220, a crushed stone 220a laid on the waterproof unit 220, and a crushed stone 220b laid below the waterproof unit 220. These are provided so as to cover the lower surface of the bottom slab concrete 20 and the entire lower end of the vertical wall 10.

  The waterproof unit 220 includes a waterproof sheet 220X and protective mats 220Y and 220Y that cover and protect the waterproof unit 220X and the upper and lower waterproof units 212 and 213 of the intermediate waterproof layer 21 and the lower waterproof unit 212, respectively. The water shielding sheet 220X, the protective mat 220Y, and the crushed stones 220a and 220b have the same specifications as those used for the first waterproof structure 21 described above.

  The waterproof unit 220 further includes a first flange 221 that rises perpendicularly to the outer periphery of the waterproof unit 220 and a second flange 222 that extends from the first flange 221 to the vertical wall 10 in the horizontal direction.

  For example, the first flange 221 rises vertically from the end of the waterproof unit 220 that extends, for example, to the outer peripheral side of 2 m from the vertical wall 10 to the ground. A concrete L-shaped retaining wall 23 is disposed on the outer peripheral side and the lower end of the first flange 221.

  The second brim part 222 extends from the first brim part 221 to the vertical wall along the ground surface, and the end part winds up to the vertical wall 10 so as to prevent rainwater and the like from entering the vertical wall 10. Are glued together.

  Therefore, the space surrounded by the waterproof unit 220, the first flange part 221, the second flange part 222, the vertical wall 10 and the bottom slab concrete 20 is free of rainwater and the like, and is retained from the waste storage facility. Since leaching of water or the like is also prevented by the first waterproof structure 21 and the bottom slab concrete 20, it is a sealed space where no liquid exists. In addition, in this space, the crushed stone 220a on the waterproof unit 220 is filled so as to block the entire space.

  Here, in order to ensure that there is no liquid in the space, the crushed stone 220a on the waterproof unit 220 is provided with perforated water collecting pipes 25 at predetermined intervals. When a liquid is present in the lower layer, the water collecting pipe 25 collects the liquid.

  As shown in FIG. 3, the water collecting pipe 25 is arranged in a mesh shape with a downward slope from the center of the waste storage facility toward the outer peripheral direction, and is connected to the water collecting pipe 26 at the outer peripheral position. The water collecting pipe 26 at the outer peripheral position is provided with a test pipe 27 that communicates with the water collecting pipe 26 at a predetermined interval and extends in the vertical direction so as to penetrate the second flange 222.

  Therefore, if there is leakage or rainwater intrusion into the water collection pipes 25 and 26, it can be detected by the inspection pipe 27 outside the waste storage facility. At this time, by associating the detection site and the non-detection site of the water leakage with the paths of the water collecting pipes 25 and 26, it is possible to identify the site where the malfunction has occurred, and to perform a quick repair treatment or the like. Become.

  The detection of water leakage is impossible due to the first waterproof structure 21 and the bottom slab concrete 20 in the structure of the waste storage facility of the present embodiment. In addition, the infiltration of rainwater cannot be performed by the first brim part 221 and the second brim part 222 because of the structure of the waste storage facility of the present embodiment. However, even if water leakage or the like is detected, water leakage is prevented by the second waterproof structure 22, and the water can be treated by pumping up from the test tube 27.

  Next, the roof portion 30 includes a plurality of support columns 31 erected on the upper end surface of the vertical wall 10, and a roof 32 that is supported by the support columns 31 and covers the entire top of the waste storage facility.

  In this way, by making the waste storage facility a so-called closed-type waste storage facility, the intrusion of rainwater from directly above the waste storage facility is eliminated, and the treatment of the retained water in the waste storage facility becomes unnecessary. At the same time, the water collecting pipe 25 can be used for monitoring intrusion of rainwater or the like from outside the waste storage facility.

  Next, the approach path 40 is an approach path for carrying waste from outside the waste storage facility into the field by a trailer or a dump truck, and has a predetermined inclination angle so as to exceed the vertical wall 10 outside and inside the field. (For example, 10%) is provided along the vertical wall 10 (illustration of the off-site carry-in path is omitted).

  The approach path 40 includes a support wall 10a and a road surface wall 10b, and is made of concrete similar to the vertical wall 10 and the bottom slab concrete 20, and is integrally formed therewith. In addition, the surface of the road surface wall 10b is covered with a waterproof unit similar to the waterproof unit 211 of the uppermost layer of the first waterproof structure 21, and concrete pavement is further sandwiched on the road surface. Moreover, the fence 41 is provided in the edge of the road surface wall 10b.

  The above is the details of the bottom slab structure of the waste storage facility of this embodiment. According to the bottom slab structure of the waste storage facility of this embodiment, in addition to the strong bottom slab concrete composed of concrete integrated with the vertical wall 10, there are three layers of waterproof units 211, 212, 213 on the upper side. Since the 1 waterproof structure 21 and the 2nd waterproof structure 22 which has the waterproof unit 220 in the lower side are provided, the water leak from the waste storage facility can be prevented reliably.

  Furthermore, the crushed stone 220a of the second waterproof structure 22 is provided with a water collecting pipe 25, and the first brim portion is provided so as to block the inflow of rainwater or the like from outside the waste storage facility to the water collecting pipe 25. Since the 221 and the second brim part 222 are provided, it is possible to reliably determine the presence or absence of water leakage by monitoring the water collecting pipe 25 from the inspection pipe 27 and to ensure the safety of the waste storage facility. it can.

  As described above, according to the bottom slab structure of the waste storage facility of the present embodiment, it is possible to realize a stronger bottom slab structure and a higher level of safety performance to prevent water leakage.

  In the present embodiment, in particular, since the roof portion 30 is provided, there is no intrusion of rainwater from directly above the waste storage facility, the treatment of the retained water in the waste storage facility becomes unnecessary, and the water collecting pipe 25 is provided. It is possible to realize a higher level of safety performance that can be used for monitoring intrusion of rainwater or the like from outside the waste storage facility.

  Here, when the roof portion 30 is not provided, that is, when a so-called open type waste storage facility is provided, a rainwater collecting pipe (not shown) is provided on the crushed stone 210a of the uppermost layer of the first waterproof structure 21. In addition, the water stored in the waste storage facility can be treated through the rainwater collecting pipe.

  In this case, the water retained in the waste storage facility is not leaked by the first waterproof structure 21 and the bottom slab concrete 20, and therefore, the water collecting pipe 25 is mainly used for monitoring intrusion of rainwater or the like from outside the waste storage facility. Can be used as a secondary leak detection.

DESCRIPTION OF SYMBOLS 10 ... Vertical wall, 20 ... Bottom slab concrete, 21 ... 1st waterproof structure, 22 ... 2nd waterproof structure, 25, 26 ... Water collecting pipe, 27 ... Inspection pipe, 30 ... Roof part, 40 ... Approaching path, 110 ... Inner side surface waterproof structure, 120 ... covering structure, 211, 212, 213, 220 ... waterproof unit, 210a, 210b, 210c, 220a, 220b ... crushed stone, 221 ... first collar part, 222 ... second collar part, GL ... the ground surface.

Claims (4)

A bottom plate structure of a waste storage facility for storing waste,
Bottom slab concrete that closes the bottom of the waste storage facility integrally with a vertical wall made of concrete standing on the outer periphery of the waste storage facility;
A first waterproof in which a waterproof unit composed of a water shielding sheet and a protective mat covering the top and bottom of the water shielding sheet and a crushed stone laid on the waterproof unit are laminated on the bottom slab concrete in a plurality of layers. A structure,
Under the bottom slab concrete, the waterproof unit and a crushed stone laid on the waterproof unit, a second waterproof structure covering the lower surface of the bottom slab concrete and the entire lower end of the vertical wall;
A perforated water collecting pipe disposed at predetermined intervals on the crushed stone of the second waterproof structure,
The second waterproof structure has a first flange portion that rises perpendicularly to the outer peripheral edge thereof, and a second flange portion that extends in a horizontal direction from the first flange portion to the vertical wall, and is connected to the water collecting pipe. A bottom plate structure of a waste storage facility, wherein inundation from outside the waste storage facility is blocked. In the bottom slab structure of the waste storage facility according to claim 1,
The water collecting pipe is arranged in a mesh shape inclined downward from the center to the outer peripheral direction in the second waterproof structure, and an inspection pipe that communicates with the water collecting pipe and extends in the vertical direction penetrates the second flange portion at the outer peripheral position. A bottom plate structure of a waste storage facility, characterized in that it is provided as follows. In the bottom plate structure of the waste storage facility according to claim 1 or 2,
A bottom plate structure of a waste storage facility, wherein a roof portion is formed so as to cover the entire upper end side of the vertical wall. In the bottom plate structure of the waste storage facility according to claim 1 or 2,
A bottom slab structure for a waste storage facility, comprising a perforated rainwater collecting pipe disposed at predetermined intervals on the crushed stone in the uppermost layer of the first waterproof structure.