JP7350689B2 - Landfill method - Google Patents

Description

The present invention relates to a landfill method.

BACKGROUND ART Conventionally, in processing facilities that dispose of waste in landfills, in order to deal with problems such as scattering of waste, bad odors, and groundwater contamination, it has been known to cover the area where the landfill is to be carried out with a building. A waste disposal site may have several disposal pits that are sequentially sent to landfill. In such disposal sites, buildings are generally built only for the disposal pits that are to be reclaimed, rather than for the entire treatment facility. The building will then be relocated in conjunction with the change of the disposal pit targeted for landfill. When relocating such a building, there is a concern that if the relocation of the new disposal pit is started before the relocation of the building is completed, contaminated water will be generated due to precipitation. On the other hand, in order to avoid the generation of such contaminated water, it is necessary to stop or restrict the landfilling of waste until the relocation of the building is completed. A technology that can help solve such problems is to use multiple covered facilities (buildings) that are each movable, and while one building is being moved, waste can be reclaimed in a landfill section covered by another building in parallel. A method for disposing of waste in a landfill is known (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2019-217470

However, in the waste landfill disposal method of Patent Document 1, at least a pair of buildings of the same size must be prepared, and when the building is relocated, the pair of buildings must be relocated. Therefore, waste cannot be landfilled while the pair of buildings is being relocated.

Therefore, an object of the present invention is to perform continuous landfilling of waste when relocating a building of a waste processing facility while avoiding the influence of precipitation on the waste.

The landfill method of the present invention includes a step of covering the first disposal pit with a first building, and at the time of reclaiming the first disposal pit, The method further includes the step of covering a portion of the second disposal pit with a second building smaller than the first building.

The above method further includes the step of providing the second disposal pit with a precipitation prevention structure that prevents precipitation from flowing into the waste from the surroundings to be dumped in a predetermined section covered by the second building. be able to.

Another landfill method of the present invention is a landfill method for burying waste in a first disposal pit and a second disposal pit, in which the first disposal pit is a step of separating and relocating the first portion to the second disposal pit when filling the first disposal pit; providing a structure for preventing precipitation from flowing into the waste dumped in a predetermined section, and providing a gantry of a raised floor structure in the predetermined section as the structure for preventing precipitation from flowing into the waste. This method includes providing an embankment in the predetermined section, and installing a box that can store the waste and is installed in the second disposal pit.

Still another landfill method of the present invention is a landfill method for burying waste in a first disposal pit and a second disposal pit, including the step of covering the first disposal pit with a building; After the building is filled with waste, the step of moving the building so as to cover the second disposal pit, and the step of moving the building to a predetermined section in the second disposal pit until the relocation of the building is completed. The method includes the step of dumping waste and installing a cover to cover the waste dumped in the predetermined area.

The above method may further include the step of providing the second disposal pit with a precipitation prevention structure that prevents precipitation from flowing into the waste from the surroundings to be dumped in the predetermined section.

In the above method, a gantry having a raised floor structure may be provided in the predetermined section as the rainwater inflow prevention structure. Further, a wall may be provided around the predetermined section as the rainwater inflow prevention structure.

Moreover, in the above method, a running water groove may be provided around the predetermined section as the rainwater inflow prevention structure. Further, as the rainwater inflow prevention structure, an embankment may be provided in the predetermined section. Furthermore, the rainwater inflow prevention structure may include a box that can house the waste and is installed in the second disposal pit.

According to the present invention, it is possible to continuously landfill waste when relocating a waste treatment facility to a building while avoiding the influence of precipitation on the waste.

FIG. 1(A) to FIG. 1(D) are process diagrams of the landfill method of the first embodiment. FIG. 2(A) is a perspective view schematically showing a second disposal pit in which a raised platform structure is provided, and FIG. 2(B) is a sectional view taken along line A1-A1 in FIG. 2(A). FIG. 3(A) is a perspective view schematically showing a second disposal pit provided with a wall inside, and FIG. 3(B) is a sectional view taken along the line A2-A2 in FIG. 3(A). FIG. 4(A) is a perspective view schematically showing a second disposal pit provided with a water flow groove therein, and FIG. 4(B) is a sectional view taken along line A3-A3 in FIG. 4(A). FIG. 5(A) is a perspective view schematically showing a second disposal pit having an embankment provided therein, and FIG. 5(B) is a sectional view taken along the line A4-A4 in FIG. 5(A). FIG. 6(A) and FIG. 6(B) are process diagrams of the landfill method of the second embodiment. FIGS. 7(A) to 7(C) are explanatory diagrams showing some of the steps included in the landfill method of the third embodiment. FIG. 8(A) is a perspective view schematically showing a second disposal pit in which a box is installed inside in the fourth embodiment, and FIG. 8(B) is a sectional view taken along the line A5-A5 in FIG. 8(A). It is. FIG. 9(A) is a perspective view showing how the boxes are covered, and FIG. 9(B) is an explanatory view showing how the boxes are stacked. FIG. 10(A) is a perspective view showing how the opening provided in the side wall of the box body is closed with a shutter member, and FIG. 10(B) is a perspective view showing how the opening provided in the side wall of the box body is closed by lifting the shutter member. FIG. 3 is a perspective view showing an opened state. FIG. 11(A) shows the waterproof bag in the fifth embodiment with the mouth open, and FIG. 11(B) shows the waterproof bag filled with waste and the mouth closed. FIG. 11C is an explanatory diagram showing a stack of waterproof bags filled with waste and with their mouths closed. Figure 12 schematically shows how the wall located between the first and second disposal pits is left and the other parts are moved when the building is moved from the first disposal pit to the second disposal pit. FIG. FIG. 13 is an example of a time chart showing the work steps in the embodiment together with the work steps in the comparative example.

Hereinafter, embodiments will be described based on the drawings.

(First embodiment)
First, a schematic configuration of the waste treatment facility 100 will be described with reference to FIGS. 1(A) to 1(D). FIG. 1(A) to FIG. 1(D) are process diagrams of the landfill method of the first embodiment. The processing facility 100 includes a plurality of disposal pits. The plurality of disposal pits are targeted for landfilling the waste 1 in turn. Generally, when waste 1 is dumped into a disposal pit that is currently being reclaimed, and the disposal pit that is currently being reclaimed is full, other disposal pits adjacent to the full disposal pit are will be sent to landfill. In Figures 1(A) to 1(D), the disposal pit currently targeted for landfill is designated as the first disposal pit P1, which is adjacent to the first disposal pit P1, and is the next target for landfill after the first disposal pit P1. This disposal pit is designated as the second disposal pit P2. The opening of each disposal pit is generally of the same size. Note that capping 2 is applied to the disposal pit in which the waste 1 has been completely landfilled. Further, each disposal pit can be provided with a roadway through which a vehicle transporting the waste 1 can enter, or a conveyor, a forklift, a crane, etc. used for transporting the waste 1 can be provided. Furthermore, the heavy machinery used to install the second building 15, which will be described later, may be used to transport the waste 1.

The first disposal pit P1, which is to be reclaimed, is covered by the first building 10. The first building 10 covers the entire first disposal pit P1. This first building 10 is sequentially relocated as the disposal pit targeted for landfill changes. Since each disposal pit has an opening of approximately the same size, the first building 10 can cover each disposal pit.

The treatment facility 100 is provided with leachate adjustment equipment 3 connected to each disposal pit. The leachate adjustment facility 3 includes a storage tank that temporarily stores precipitation that has passed through each disposal pit. The leachate adjustment facility 3 is connected to a leachate treatment facility 4, and the leachate stored in the leachate adjustment facility 3 is treated in the leachate treatment facility 4 and discharged outside the facility. Here, leachate is wastewater that has seeped out of the treatment facility 100 when precipitation such as rainwater has passed through the dumped waste 1, and is sewage that needs to be treated in order to be discharged outside the facility. .

Next, a method for landfilling waste 1 in such a treatment facility 100 will be explained. First, as shown in FIG. 1(A), the first disposal pit P1 to be reclaimed is covered by the first building 10. The first building 10 is equipped with a roof and a side wall around the circumference, which prevents precipitation from falling on the waste to be dumped in the first disposal pit P1, and also prevents odor from spreading around the treatment facility 100. to prevent the scattering of dust, etc. Further, by providing the first building 10, it is possible to hide the state in which waste is being dumped from the outside of the treatment facility 100.

A worker dumps waste 1 into a first disposal pit P1 covered by a first building 10, as shown in FIG. 1(A). The worker applies capping 2 to the dumped waste 1 as shown in FIG. 1(B). While the first disposal pit P1 is being reclaimed in this way, the worker installs a second building 15 smaller than the first building 10 in a predetermined section Ar1 that is a part of the second disposal pit P2. to cover the predetermined section Ar1.

The second building 15 is used to transport waste 1 to the second disposal pit P2 until the first building 10, which covers the entire first disposal pit P1, is relocated so as to cover the entire second disposal pit P2. This is to enable dumping.

When precipitation falls on waste 1, the precipitation becomes leachate. If the waste 1 is dumped into the second disposal pit P2 without any cover, leachate will increase, and in order to cope with the increase in leachate, the processing capacity of the leachate adjustment equipment 3 must be improved. You will be asked for it. If the treatment capacity of the leachate adjustment equipment 3 is improved, the installation cost of the treatment facility 100 will also increase. For this reason, conventionally, when dumping the waste 1 in the second disposal pit P2, in order to prevent the dumped waste 1 from being exposed to precipitation, the relocation of the first building 10 to the second disposal pit P2 was completed. Later, dumping of waste 1 into the second disposal pit P2 was started.

However, if dumping of the waste 1 to the second disposal pit P2 is started after the relocation of the first building 10 is completed, the relocation of the first building 10 is completed after the relocation of the first building 10 is started. Until then, waste 1 cannot be dumped.

Therefore, in this embodiment, as shown in FIG. 1(A) and FIG. 1(B), while the landfill including the dumping of the waste 1 into the first disposal pit P1 and the construction of the capping 2 are being performed, A predetermined section Ar1 within the second disposal pit P2 is covered with the second building 15. Thereby, it is possible to start dumping the waste 1 into the predetermined section Ar1 immediately after the first disposal pit P1 becomes full, and it is possible to continuously dump the waste 1.

Then, as shown in FIG. 1(C), the first building 10 that covered the first disposal pit P1 while dumping the waste 1 into the predetermined section Ar1 is replaced with the second disposal pit P2. Relocate it as follows. After the relocation of the first building 10 to the second disposal pit P2 is completed, the second building 15 is removed as shown in FIG. 1(D). After the relocation of the first building 10 is completed, even if the second building 15 is removed, it is possible to avoid precipitation from falling on the first building 10, so the entire area of the second disposal pit P2 can be used for the waste 1. Can be targeted for disposal. When the first disposal pit P1 is filled in, the area that was the second disposal pit P2 will become the first disposal pit P1, and the disposal pit adjacent to the new first disposal pit P1 will become the new second disposal pit P1. This becomes pit P2. If you want to change the disposal pit targeted for landfill, repeat the same process.

In this embodiment, the second building 15 is provided when the first disposal pit P1 is filled, but the second building 15 may be provided after the first disposal pit P1 is filled. Even with this configuration, the installation of the second building 15 takes a shorter time than the installation of the first building 10, so there is little effect on continuous dumping of the waste 1.

In this way, by providing the second building 15 in the predetermined section Ar1 within the second disposal pit P2, it is possible to prevent precipitation from falling on the waste 1 dumped in the predetermined section Ar1. However, since the second building 15 covers only the predetermined section Ar1, precipitation may fall around the predetermined section Ar1, and the precipitation may fall on the waste 1 dumped in the predetermined section Ar1. It is expected that there will be a flow. When precipitation flows into waste 1, the amount of leachate increases, similar to when precipitation falls directly on waste 1. Therefore, the reclamation method of this embodiment includes the step of providing a structure for preventing precipitation from flowing into the predetermined section Ar1.

For convenience of drawing, the rainwater inflow prevention structure is not depicted in FIGS. 1(A) to 1(D), but the landfill method in the treatment facility 100 of this embodiment is shown in FIGS. 2(A) to 5. In addition to the step shown in (B), the step of providing a rainwater inflow prevention structure listed below can be adopted as appropriate.

≪Installation of the gantry≫
FIG. 2(A) is a perspective view schematically showing the second disposal pit P2 in which a raised-floor structure gantry 20 is provided, and FIG. 2(B) is a sectional view taken along the line A1-A1 in FIG. 2(A). be. The treatment facility 100 can employ a raised floor structure gantry 20 shown in FIGS. 2(A) and 2(B) as a structure for preventing precipitation from flowing into the second disposal pit P2.

In this embodiment, since the second building 15 is provided on the gantry 20, the gantry 20 of this embodiment is provided in the second disposal pit P2 prior to the installation of the second building 15 in the predetermined section Ar1. The gantry 20 includes a column 20a erected on the bottom P2a of the second disposal pit P2 and a plate-like section 20b installed on the top of the column 20a. The member supporting the plate-like part 20b does not necessarily have to be the columnar column part 20a, but may be any other structure, such as a wall-like member, as long as the plate-like part 20b is raised from the bottom P2a. may be adopted.

The waste 1 is dumped onto the plate-shaped portion 20b. The second building 15 is provided so as to cover the plate-shaped portion 20b. Note that in this embodiment, after installing the gantry 20, the second building 15 is provided above it, but it is possible to install the gantry 20 with the second building 15 installed on the plate-shaped part 20b in advance on the bottom part P2a. You can also do this. Moreover, the column part 20a may be installed in the bottom part P2a, and the plate-shaped part 20b with the 2nd building 15 installed may be installed in the column part 20a. Moreover, in this embodiment, the second building 15 is installed on the plate-like part 20b, but it may be installed on the bottom part P2a so as to cover the plate-like part 20b.

By installing the gantry 20, precipitation falling around the predetermined section Ar1 where the second building 15 is installed and flowing down the bottom P2a as shown by the arrow 5 in FIG. 2(A) can flow into the waste 1. is avoided. This suppresses the increase in leachate. This point also applies to other rainwater inflow prevention structures described below.

≪Wall installation≫
FIG. 3(A) is a perspective view schematically showing a second disposal pit P2 provided with a wall 25 inside, and FIG. 3(B) is a sectional view taken along the line A2-A2 in FIG. 3(A). The treatment facility 100 can employ a wall 25 shown in FIGS. 3(A) and 3(B) as a structure for preventing precipitation from flowing in. The wall 25 is provided at the bottom P2a of the second disposal pit P2. The wall 25 may be provided prior to the installation of the second building 15 in the predetermined section Ar1, or may be provided after the installation of the second building 15.

By installing the wall 25, precipitation falling around the predetermined section Ar1 where the second building 15 is installed and flowing down the bottom P2a as shown by the arrow 5 in FIG. Inflow is avoided. This suppresses the increase in leachate.

≪Installation of running water ditch≫
FIG. 4(A) is a perspective view schematically showing a second disposal pit P2 in which a water flow groove 30 is provided, and FIG. 4(B) is a sectional view taken along the line A3-A3 in FIG. 4(A). The treatment facility 100 can employ a drainage ditch 30 shown in FIGS. 4(A) and 4(B) as a structure for preventing precipitation from flowing in. The water flow groove 30 is provided at the bottom P2a of the second disposal pit P2. The running water groove 30 may be provided prior to the installation of the second building 15 in the predetermined section Ar1, or may be provided after the installation of the second building 15.

By installing the drainage ditch 30, precipitation that falls around the predetermined section Ar1 where the second building 15 is installed and flows down the bottom P2a as shown by the arrow 5 in FIG. Inflow is avoided. This suppresses the increase in leachate.

≪Employment installation≫
FIG. 5(A) is a perspective view schematically showing a second disposal pit P2 in which an embankment 35 is provided, and FIG. 5(B) is a sectional view taken along the line A4-A4 in FIG. 5(A). The treatment facility 100 can employ an embankment 35 shown in FIGS. 5(A) and 5(B) as a structure for preventing precipitation from flowing in. The embankment 35 is provided at the bottom P2a of the second disposal pit P2. The embankment 35 may be provided prior to the installation of the second building 15 in the predetermined section Ar1, or may be provided after the second building 15 is installed.

By installing the embankment 35, precipitation that falls around the predetermined section Ar1 where the second building 15 is installed and flows down the bottom P2a as shown by the arrow 5 in FIG. 5(A) flows into the waste 1. This will be avoided. This suppresses the increase in leachate.

(Second embodiment)
Next, the landfill method of the second embodiment will be described with reference to FIGS. 6(A) and 6(B). The reclamation method of the second embodiment includes the step of covering the first disposal pit P1 with a building 40 having at least a separable first part 40a and a second part 40b. Moreover, the reclamation method of the second embodiment includes a step of separating the first portion 40a and relocating it to the second disposal pit P2 at the time of reclamation of the first disposal pit P1.

The building 40 is divided into a first part 40a, a second part 40b, a third part 40c, a fourth part 40d, and a fifth part 40e along the longitudinal direction. The building 40 is provided in place of the first building 10 of the first embodiment. Therefore, the first disposal pit P1, which is to be reclaimed, is covered with a building 40. The building 40 covers the entire first disposal pit P1. This building 40 is sequentially relocated as the disposal pit targeted for landfill changes. At this time, the building 40 can be separated and relocated from the first part 40a to the fifth part 40e.

The target section for dumping waste 1 into the first disposal pit P1 starts from the part covered by the first part 40a, followed by the part covered by the second part 40b, and then the part covered by the third part 40c. Move to the part where you are.

Therefore, in this embodiment, as shown in FIG. 6(A), the waste 1 in the area covered by the first part 40a is first dumped, and then the area covered by the second part 40b is dumped. The area will be designated as a dumping area. Capping 2 is applied to the portion covered by the first portion 40a. When the capping 2 of the area covered by the first portion 40a is completed, the first portion 40a is separated and, as shown in FIG. 6(B), the separated first portion 40a is transferred to the second disposal pit P2.

The position where the first portion 40a is installed in the second disposal pit P2 corresponds to the portion covered by the first portion 40a in the first disposal pit P1. In the second disposal pit P2, the position covered by the first portion 40a becomes the predetermined section Ar1. The first portion 40a is relocated while the waste 1 is being dumped from the second portion 40b to the portion covered by the fifth portion 40e in the first disposal pit P1.

As a result, when the first disposal pit P1 becomes full, at least the first portion 40a has been moved to the second disposal pit P2, and the transfer to the predetermined section Ar1 covered by the first portion 40a is immediately completed. Waste 1 can be dumped. The relocation of the building 40 can be completed by relocating the fifth portion 40e from the second portion 40b while the waste 1 is being dumped into the predetermined section Ar1.

In this way, even in the second embodiment, the waste 1 can be continuously dumped like the first embodiment.

The building 40 of this embodiment is divided into five parts along the longitudinal direction and each part is separated and relocated, but the manner in which the buildings are separated is not limited to this and can be changed as appropriate. In addition, in this embodiment, the first portion 40a is relocated in advance, but after the other portions are relocated in advance and the first disposal pit P1 is full, the relocated portions are covered. The waste 1 may also be dumped from a divided section.

In the second embodiment as well, the gantry 20, wall body 25, drainage ditch 30, and embankment 35 described in the first embodiment with reference to FIGS. 2(A) to 5(B) are used as a rainwater flow prevention structure. The steps provided can be adopted as appropriate.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. 7(A) to 7(C). Similar to the first embodiment, the reclamation method of the third embodiment includes the step of covering the first disposal pit P1 with a building. However, the step of covering the first disposal pit P1 with a building is not depicted in FIG. The steps after the step of dumping waste 1 into Ar1 are depicted. Furthermore, regarding reference numbers that do not appear in FIG. 7A and the like, the same reference numbers as in the first embodiment will be used in the following description for components that are common to the first embodiment.

After covering the first disposal pit P1 with the first building 10, as shown in FIG. 7(A), a gantry 20 as a structure to prevent precipitation from flowing into a predetermined section Ar1 at the bottom P2a of the second disposal pit P2 is provided, The waste 1 is dumped onto the gantry 20. The operator sets up the gantry 20 before the first disposal pit P1 is filled with waste 1. After the first disposal pit P1 is full, the worker starts dumping the waste 1 onto the gantry 20.

The worker covers the waste 1 dumped on the gantry 20 with a waterproof sheet 50 as shown in FIGS. 7(B) and 7(C). The timing of covering the waste material 1 with the sheet 50 can be appropriately selected so that precipitation does not fall on the waste material 1. For example, when the weather forecast predicts precipitation, you can select the timing before the precipitation starts, or the timing after all waste 1 dumping work has been completed on the day. . The point is that it is sufficient to avoid rain falling on the dumped waste 1 and to suppress the generation of leachate. Note that even after covering the waste 1 with the sheet 50, if there is still room to stack the waste 1, the sheet 50 is peeled off, the waste 1 is dumped, and the sheet 50 is covered again. It may be covered.

While the waste 1 is being dumped into the second disposal pit P2 in this way, the building that covered the first disposal pit P1 is relocated so as to cover the second disposal pit P2. Thereby, the waste 1 can be continuously dumped into the second disposal pit P2 while avoiding precipitation falling on the waste 1 after the first disposal pit P1 is full.

In addition, in this embodiment, the gantry 20 is adopted as a structure for preventing precipitation from flowing in, but the step of providing the gantry 20, the wall body 25, the running water groove 30, and the embankment 35 as a structure for preventing precipitation from flowing in as described in the first embodiment is may be adopted as appropriate.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. 8(A) to 10(B). FIG. 8(A) is a perspective view schematically showing a second disposal pit P2 in which a box 60 is installed in the fourth embodiment, and FIG. 8(B) is a perspective view taken along the line A5-A5 in FIG. 8(A). FIG. FIG. 9(A) is a perspective view showing how the lid 61 is placed on the box 60, and FIG. 9(B) is an explanatory view showing how the boxes 60 are stacked.

The reclamation method of the fourth embodiment includes the step of covering the first disposal pit P1 with a building, similarly to the first embodiment. However, in Fig. 8(A) etc., there is a step of covering the first disposal pit P1 with a building, and a step of covering the building and the second disposal pit P2 after the first disposal pit P1 is full of waste 1. The steps for relocation are not depicted. Furthermore, regarding reference numbers that do not appear in FIG. 8A and the like, the same reference numbers as in the first embodiment will be used in the following description for components that are common to the first embodiment.

Referring to FIGS. 9(A) and 9(B), the box body 60 includes a bottom plate and a side wall 60a which are not shown in the drawings, and has an opening 60b, in which the waste 1 can be stored. I can do it. The waste 1 is stored in the box 60 and dumped into the second disposal pit P2. The operator may store the waste 1 in the box 60 and carry the box 60 into the second disposal pit P2. Further, an empty box 60 or a box 60 with sufficient storage capacity for the waste 1 is carried into the second disposal pit P2 in advance, and the waste 1 is dumped into the box 60. It's okay. Further, the operator may install the lid 61 on the box 60 containing the waste 1 and carry the box 60 into the second disposal pit P2, or may carry the box 60 into the second disposal pit P2. A lid 61 may be installed on the box body 60.

The timing of installing the lid 61 on the box 60 in which the waste 1 has been dumped can be appropriately selected so that the waste 1 is not rained on. For example, when the weather forecast predicts precipitation, you can select the timing before the precipitation starts, or the timing after all waste 1 dumping work has been completed on the day. . The point is that it is sufficient to avoid rain falling on the dumped waste 1 and to suppress the generation of leachate.

Furthermore, if there is sufficient storage capacity for the waste 1 in the box 60, the installed lid 61 may be opened once and the waste 1 may be dumped into the box 60 again.

Further, as shown in FIG. 9(B), the boxes 60 can be arranged one on top of the other, and in such a case, the upper box 60 functions as a lid for the lower box 60. It is not necessary to install the lid 61. That is, the lid 61 may be installed on the box 60 at the top.

While the waste 1 is being dumped into the second disposal pit P2 in this way, the building that covered the first disposal pit P1 is relocated so as to cover the second disposal pit P2. Thereby, the waste 1 can be continuously dumped into the second disposal pit P2 while avoiding precipitation falling on the waste 1 after the first disposal pit P1 is full.

In the first embodiment, a precipitation prevention structure was provided to prevent precipitation from flowing into the waste 1 dumped into the second disposal pit P2, but in this embodiment, the side wall of the box body 60 60a functions as a rainwater inflow prevention structure. Therefore, by simply installing the box 60 in the second disposal pit P2, it is possible to prevent precipitation from flowing into the waste 1 from the surroundings.

Note that a box 70 shown in FIGS. 10(A) and 10(B) may be used instead of the box 60. 10(A) is a perspective view showing a state in which the opening 70a1 provided in the side wall 70a of the box body 70 is closed with the shutter member 71, and FIG. It is a perspective view showing a state in which an opening 70a1 provided in 70a is opened. While it is desirable to avoid rain falling on the waste 1, in order to promote the decomposition of the waste 1, watering with a controlled amount of water is performed on the dumped waste 1. There is. Therefore, even when the waste 1 is dumped using the box 60, the dumped waste may be sprinkled with water. However, when the box 60 includes a bottom plate and side walls 60a, the sprayed water is not discharged from the box 60. Therefore, a box 70 having an opening 70a1 in the side wall 70a can be used. The box body 70 includes an opening 70a1 in a side wall 70a, and an insertion groove 70a2 extending inward from the upper edge of the side wall 70a and communicating with the opening 70a1. A plate-shaped shutter member 71 is removably provided in the insertion groove 70a2. If it is desired to retain water in the box 70, the opening 70a1 can be closed by inserting the shutter member 71 into the insertion groove 70a2 as shown in FIG. 10(A). On the other hand, when it is desired to drain water from inside the box body 70, the shutter member 71 can be lifted and pulled out from the insertion groove 70a2 to open the opening 70a1, as shown in FIG. 10(B).

(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIGS. 11(A) to 11(C). FIG. 11(A) shows the waterproof bag 75 in the fifth embodiment with the opening 75a open, and FIG. 11(B) shows the waterproof bag 75 filled with waste 1 and with the opening 75a closed. A bag 75 is shown. FIG. 11(C) is an explanatory diagram showing a stacked state of waterproof bags 75 filled with waste 1 and with mouths 75a closed.

Similar to the first embodiment, the landfill method of the fifth embodiment includes the step of covering the first disposal pit with a building. However, in FIGS. 11(A) to 11(C), there is a step of covering the first disposal pit with a building, and further, after the first disposal pit is full of waste 1, the building is replaced with a second disposal pit. The steps for relocating it to cover it are not shown. Furthermore, regarding reference numbers that do not appear in FIGS. 11(A) to 11(B), the same reference numbers as in the first embodiment will be used in the following description for components common to the first embodiment.

Referring to FIGS. 11(A) to 11(C), the waterproof bag 75 can contain the waste 1. The waste 1 is stored in a waterproof bag 75 and dumped into the second disposal pit P2. The operator may store the waste 1 in the waterproof bag 75 and carry the waterproof bag 75 into the second disposal pit P2. Further, an empty waterproof bag 75 or a waterproof bag 75 with sufficient storage capacity for the waste 1 is carried into the second disposal pit P2, and the waste 1 is dumped into the waterproof bag 75. Good too. Alternatively, the operator may close the mouth of the waterproof bag 75 containing the waste 1 as shown in FIG. 11(B) and carry the waterproof bag 75 into the second disposal pit P2. The opening 75a of the waterproof bag 75 carried into the second disposal pit P2 may be closed. The waterproof bags 75 containing the waste 1 may be stacked as shown in FIG. 11(C).

The timing of closing the opening 75a of the waterproof bag 75 in which the waste 1 has been dumped can be appropriately selected so that the waste 1 is not rained on. For example, when the weather forecast predicts precipitation, you can select the timing before the precipitation starts, or the timing after all waste 1 dumping work has been completed on the day. . The point is that it is sufficient to avoid rain falling on the dumped waste 1 and to suppress the generation of leachate.

Further, if there is sufficient storage capacity for the waste 1 in the waterproof bag 75, the closed mouth 75a may be opened once and the waste 1 may be dumped into the waterproof bag 75 again.

While the waste 1 is being dumped into the second disposal pit P2 in this way, the building that covered the first disposal pit P1 is relocated so as to cover the second disposal pit P2. Thereby, the waste 1 can be continuously dumped into the second disposal pit P2 while avoiding precipitation falling on the waste 1 after the first disposal pit P1 is full.

In the first embodiment, a structure for preventing precipitation from flowing into the waste 1 dumped into the second disposal pit P2 was provided, but in this embodiment, the waterproof bag 75 itself is It functions as a structure to prevent precipitation from flowing in. Therefore, by simply installing the waterproof bag 75 in the second disposal pit P2, it is possible to prevent precipitation from flowing into the waste 1 from the surroundings.

According to the landfill method disclosed in this specification, the waste 1 is continued to be landfilled while the first building 10 (building 40) covering the first disposal pit P1 is relocated so as to cover the second disposal pit P2. However, it is desirable to make the relocation of the building as simple as possible. Therefore, like the building 80 shown in FIG. 12, a wall that forms part of the building 80 and is located between the first disposal pit P1 and the second disposal pit P2 can be used as a common wall 80a. Thereby, when moving the building 80 from the first disposal pit P1 to the second disposal pit P2, it is not necessary to move the common wall 80a, so the time required for moving the building 80 can be shortened.

According to the reclamation method disclosed in this specification, when the first disposal pit P1 is reclaimed, a part of the second disposal pit P2 is covered with the second building 15 smaller than the first building 10. Thereby, while the first building 10 is being moved from the first disposal pit P1 to the second disposal pit P2, the waste 1 can be continuously dumped and reclaimed in the section covered by the second building 15.

For example, as shown in FIG. 13, if the installation of the first building 10 is started at time T1 and the installation is completed at time T2, the first disposal pit P1 can be reclaimed from time T2. Assuming that the first disposal pit P1 becomes full at time T3, installation of structures for preventing precipitation from flowing in, such as the gantry 20, and installation of the second building 15 are performed between time T2 and time T3. The first building 10 is relocated over a period of time T4 from time T3 when the first disposal pit P1 is full, but the second disposal pit P2 can be reclaimed during that period. After the relocation of the first building 10 is completed, the entire area of the second disposal pit P2 can be reclaimed.

On the other hand, in the comparative example, while the first disposal pit P1 is being filled from time T2 to time T3, no work is performed in parallel. Therefore, the waste 1 cannot be dumped during the period from time T3 to time T4 when the first disposal pit P1 is full and the first building 10 is being relocated.

As described above, according to one embodiment of the invention disclosed herein, waste 1 can be continuously landfilled. In the example shown in FIG. 13, the structure for preventing precipitation from flowing in is installed prior to the installation of the second building 15. After that, a structure to prevent precipitation from flowing in may be installed.

According to another reclamation method disclosed in this specification, the first portion 40a of the building 40 is relocated to the second disposal pit P2 when the first disposal pit P1 is reclaimed. Thereby, while the parts other than the first part 40a of the building 40 are moved to the second disposal pit P2, the waste 1 can be continuously dumped and reclaimed in the section covered by the first part 40a. Note that when this method is applied to the time chart shown in FIG. 13, the first portion 40a is moved to the second disposal pit P2 between time T2 and time T3.

According to still another landfill method disclosed herein, waste 1 is dumped in the second disposal pit until the relocation of the building from the first disposal pit P1 to the second disposal pit P2 is completed. cover with the sheet 50. Thereby, the waste 1 can be continuously dumped and reclaimed in the second disposal pit P2 until the relocation of the building to the second disposal pit is completed.

In the landfill method disclosed herein, a precipitation flow structure can be provided to prevent precipitation from flowing into the waste 1 dumped in the second disposal pit from the surrounding area. This prevents precipitation from flowing into the waste 1 dumped into the second disposal pit P2 while the building is being relocated from the first disposal pit P1 to the second disposal pit P2, and suppresses the generation of leachate. can do.

In another landfill method disclosed in this specification, the waste 1 is packed into a box 60 whose opening 60b can be closed with a lid 61 or a waterproof bag 75 whose opening 75a can be closed, and then dumped into the second disposal pit P2. do. Thereby, the building can be moved from the first disposal pit P1 to the second disposal pit P2 while avoiding rain falling on the waste 1 or rain flowing into the waste 1.

In the landfill method disclosed in this specification, since the generation of leachate is suppressed, the processing capacity of the leachate adjustment equipment 3 can be suppressed, and the installation cost of the treatment facility 100 can be suppressed. Moreover, internal storage of untreated leachate in the treatment facility 100 can be avoided as much as possible, and the environmental load can be reduced.

The embodiments described above are examples of preferred implementations of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention.

1 Waste 2 Capping 3 Leachate adjustment equipment 4 Leachate treatment facility 10 1st building 15 2nd building 20 gantry 25 Wall 30 Water ditch 35 Embankment 40, 80 Building 50 Sheet 60, 70 Box 61 Lid 75 Waterproof bag 80a Common wall P1 1st disposal pit P2 2nd disposal pit

Claims (10)

In a landfill method in which waste is buried in a first disposal pit and a second disposal pit,
covering the first disposal pit with a first building;
A reclamation method including the step of covering a part of the second disposal pit with a second building smaller than the first building when the first disposal pit is reclaimed. In a landfill method in which waste is buried in a first disposal pit and a second disposal pit,
a step of covering the first disposal pit with a building having a separable first part and a second part, and separating the first part and transferring it to the second disposal pit when the first disposal pit is reclaimed; the step of
providing in the second disposal pit a precipitation prevention structure that prevents precipitation from flowing into the waste from the surroundings to be dumped in a predetermined section covered by the relocated first part;
The rainwater inflow prevention structure includes providing a platform with a raised floor structure in the predetermined section, providing an embankment in the predetermined section, and a box that can store the waste and is installed in the second disposal pit. A landfill method that either involves installing a . In a landfill method in which waste is buried in a first disposal pit and a second disposal pit,
covering the first disposal pit with a building;
After the first disposal pit is filled with the waste, relocating the building to cover the second disposal pit;
Until the relocation of the building is completed, dumping the waste in a predetermined section in the second disposal pit, and installing a cover to cover the waste dumped in the predetermined section. Landfill methods including. 2. The method according to claim 1, further comprising the step of providing the second disposal pit with a precipitation prevention structure that prevents precipitation from flowing into the waste from the surroundings to be dumped in a predetermined section covered by the second building. landfill method. 4. The landfill method according to claim 3, further comprising the step of providing a precipitation prevention structure in the second disposal pit to prevent precipitation from flowing into the waste from the surrounding area. 6. The reclamation method according to claim 4, wherein a pedestal of a raised floor structure is provided in the predetermined section as the rainwater inflow prevention structure. 6. The reclamation method according to claim 4, wherein a wall is provided around the predetermined section as the rainwater inflow prevention structure. 6. The reclamation method according to claim 4, wherein a drainage groove is provided around the predetermined section as the rainwater inflow prevention structure. 6. The reclamation method according to claim 4 , wherein an embankment is provided in the predetermined section as the rainwater inflow prevention structure. 6. The landfill method according to claim 4, wherein the structure for preventing precipitation from flowing in includes a box that can house the waste and is installed in the second disposal pit.

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