JPH01304092A - Preparation of waste disposal site - Google Patents

Abstract

PURPOSE:To permit an immediate use of the covering of waste disposal cave and waste filling therein in all weathers, by preparing an artificial ground having an opening capable of being opened and closed for dumping waste matter and covering entirely over said cave, prior to the start of filling operation. CONSTITUTION:Prior to the start of filling operation for disposal of waste matter 10, an artificial ground 42 provided with an opening capable of being opened and closed for dumping the waste matter 10 and for covering entirely over a caved place 12, is prepared in order to permit the upper ground covering of the waste disposal cave immediately after the completion of the artificial ground 42. Since the waste matter 10 is successively dumped into said dumping opening provided in said ground 42 after the completion of said ground covering entirely over the caved place 12, a backfill work can be done at any time and, since the scattering of the waste matter 10 being dumped can be prevented, there is no need for an intermediate filling, permitting the use of the total volume of the caved place 12 as the disposal area. Furthermore, the inward entry of rainwater can be prevented, obviating the need for providing a large- scale facilities to prevent the entry of the water and remove the same from the cave.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a method for creating a waste disposal site, and in particular, to a method for creating a waste disposal site that can effectively utilize the upper part of the site before the landfill is completed. .

(Prior Art) As is well known, landfill disposal is carried out as the final disposal of industrial waste discharged from business activities and general waste discharged from ordinary households.

To dispose of such waste in a landfill, a waste disposal site is constructed in an inland area such as a mountain valley or a coastal area.

This type of waste disposal site was generally constructed using the method described below.

First, a depression for dumping waste is formed by, for example, using a valley as it is, or by artificially excavating the ground, or by closing off the coast with a seawall, and the leachate inside this depression is created. To prevent leakage to the outside,
Depending on the conditions of the ground where the recess will be located, a water-blocking surface such as a water-blocking wall or a water-blocking sheet will be constructed.

Then, the waste is sequentially introduced from the bottom side into the recesses that are water-blocked by the water-blocking top, and the waste that has been thrown in is compacted as appropriate.
When the inside of the depression is almost backfilled with waste, a final covering of soil is applied and the upper part is used as a green space such as a park. I had a problem to explain.

(Problems to be Solved by the Invention) In other words, the biggest problem when constructing a waste disposal site using the method described above is that the upper part of the disposal site cannot be used until the final covering is applied.

Factors that discourage the use of the upper part of such a disposal site include the fact that it takes many years to construct the final soil cover due to the amount of waste generated, and the fact that the ground of the waste is For example, the amount of subsidence is large.

Another problem is that with the above-mentioned construction method, rainwater flows into the disposal site, which causes environmental pollutants in the waste to be leached out, which requires leachate treatment equipment, which can be quite costly. be.

Furthermore, as the waste that is thrown into the site may scatter, cause odor pollution, or cause discomfort to the landscape, there are often constraints when selecting a site due to issues with residents, etc. As a preventive measure, intermediate soil is appropriately applied to the compacted waste, but there is also the problem that intermediate soil covering reduces the amount of waste that can be disposed of.

Furthermore, the phenomenon of subsidence of the land filled with waste is unavoidable, and this has hindered the use of the site for a long time.

This invention was made in view of these conventional problems, and its purpose is to make the upper part of a disposal site available for early use and to enable landfill work to be carried out regardless of the weather. The object of the present invention is to provide a method for constructing a waste disposal site that eliminates the need for leachate treatment equipment and intermediate soil covering, and that further improves the surrounding environment.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for creating a waste disposal site in which waste is sequentially introduced into a recess, in which the waste is opened and closed before the waste is introduced. The present invention is characterized in that an artificial ground surface is constructed that includes a possible input port for the waste and covers the entire upper part of the recess.

The artificial ground surface may be supported by a plurality of piles or walls penetrated into the ground below the recess, or a water-blocking top may be provided around the outer periphery of the recess.

The above-mentioned water-shielding surface is composed of a water-shielding sheet laid over the entire inner surface of the recess, or a water-stopping wall constructed to surround the outer periphery of the recess and reaching an impermeable layer in the ground. Ru.

(Operations and Effects) According to the method for creating a waste disposal site with the above configuration, an artificial ground surface is constructed that covers the entire depression before the waste is introduced, so an artificial ground surface is constructed in the upper part of the disposal site. It can be used as soon as it is released.

In addition, after the entire depression is covered with an artificial ground surface, the waste is sequentially introduced through the opening and closing opening provided in the artificial ground surface, so backfilling work can be done at any time, and waste can be deposited at any time. Since scattering of waste is prevented, there is no need for intermediate soil covering, the entire volume of the depression can be used as a disposal site, and rainwater is also prevented from flowing in, so there is no need for treatment equipment that can cause major damage to leachate. Become.

Furthermore, if the above-mentioned artificial ground surface is supported by multiple piles or walls that penetrate into the ground with water stop treatment applied between it and the water-blocking surface, it is possible to dispose of large-scale waste. Can be applied to the field.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show an embodiment of the method for constructing a waste disposal site according to the present invention.

In the construction method shown in the figure, first, a recess 12 for accommodating the waste 10 is formed, for example, by using a valley with some modification or by excavating the ground 14 in a concave shape.

Once the recess 12 is formed, a groundwater collection pit 16 is provided at the lowest position of the recess 12.

Next, the entire inner surface of the recess 12 is covered with a water-shielding sheet 18 as a wood shield.

The water-blocking sheet 18 used here is made of synthetic rubber or synthetic resin, and these raw materials may be processed into a sheet shape in advance, or may be formed into a sheet shape by spraying on site.

The outer peripheral edge of the covered waterproof sheet 18 is bent into a groove 20 provided in the ground 14 on the outer periphery of the recess 12, and the concrete inserted and placed on the sheet 18 in the groove 20 is bent. It is locked by a block 22, which prevents the water sheet 18 from sliding down the slope of the recess 12.

When the water-blocking sheet 18 is laid so as to cover the entire inner surface of the recess 12 as described above, the piles 24 are driven.

For example, ready-made concrete piles are used as the resistors 24, and the piles 24 penetrate through the water-blocking sheet 18 to the supporting ground.

In this case, the water quality between the water-blocking sheet 18 and the piles 24 is as follows:
It is secured as shown in FIG.

In the method shown in the figure, a hole 26 slightly larger than the diameter of the pile 24 is drilled in advance at the portion where the pile 24 penetrates the water-shielding sheet 18, and an annular groove 28 is formed in the ground 14 below the hole 26. Drilling to form.

After driving the pile 24 into this annular groove 28, a water stop ring 30 is fitted around the outer periphery of the pile 24, and this water stop ring 30 is buried approximately in the center thereof. 1
An annular ring 32 is integrally formed around the outer periphery of the pile 24 by pouring concrete into the annular groove 28 so that the outer periphery of the hole 26 is embedded in the outer periphery of the hole 26.

For example, the water stop ring 30 has flexibility, and
Water-absorbing rubber that expands in volume by absorbing water is suitable.

In addition, it is also possible to perform the driving of the piles 24 before laying the water-blocking sheet 18, and then laying the water-blocking sheet 18 to perform water-stopping treatment between them.

When the water stop treatment between each pile 24 and the water-blocking sheet 18 is completed as described above, a leachate collection facility 0!34 is provided at the lowest part within the recess 12.

The water collection equipment 34 is provided on the water-blocking sheet 18, and is composed of a perforated pipe 36 for water collection and crushed stone 38 for filtering, and the perforated pipe 36 is connected to a bit (not shown) made of concrete or the like. be done. In addition, crushed stone 38 for filter
Water-permeable sheet 4 made of non-woven fabric etc. in a manner connected to
o is laid on the water-shielding sheet 18.

Simultaneously with construction of the water collection facility 34, an artificial ground surface 42 is constructed between the upper ends of the shafts 24 to cover the entire upper part of the recess 12.

In this embodiment, the artificial ground surface 42 uses a large number of rectangular precast concrete plates, and water stop plates 44 are interposed between each precast concrete plate, as shown in FIG. 3, to prevent rainwater, etc. This prevents the gas from flowing into the recess 12 and the gas from the waste 1o thrown into the recess 12 from being released to the outside.

Furthermore, as shown in FIG. 4, the artificial ground surface 42 is provided with a waste 10 input port 46 that can be opened and closed.

In the example shown in the figure, the input port 46 has a pair of walls 48, 48 erected on the artificial ground surface 42 with an interval that allows a vehicle for transporting the waste 10 to pass through. They are arranged in a straight line at intervals on the center line.

Furthermore, a plurality of ventilation towers 50 are installed at appropriate locations on the artificial ground surface 42 so as to penetrate through it to exhaust gas in the recess for ventilation.

Note that the member 52 shown in FIG. Place 1
2, and if it becomes an obstacle to the work when it is compacted using equipment such as a bulldozer, it will be removed as appropriate.

When the construction of the artificial ground surface 42 is completed as described above,
Here, the waste 10 is first introduced into the recess 12 through the input port 46, and the waste 10 accumulated in the recess 12 is compacted at an appropriate stage, and the waste 10 is finally placed in the artificial ground. It is fed until it reaches the lower surface of surface 42.

Now, when a waste disposal site is created using the method described above, the artificial ground surface 42 that covers the entire recess 12 is constructed before the waste 10 is put in, so the upper part of the disposal site is covered with the artificial ground surface 4.
2 is ready for use as soon as it is built.

In addition, the waste 10 covers the entire recess 12 as an artificial ground surface 42.
After the waste is covered with water, it is sequentially poured through the opening/closable input port 46 provided on the artificial ground surface 42, so the backfilling work can be done at any time without being restricted by the weather, and the thrown waste 10 is prevented from scattering. Since this is prevented by the artificial ground surface 42, there is no need to perform intermediate soil covering, and the entire volume of the depression 12 can be used as a disposal site.In addition, the inflow of rainwater is also prevented, so the leachate is only decomposed water of waste. All you have to do is take this into consideration, and there is no need for leachate treatment equipment in Inuyama.

Furthermore, a pile 24 that is water-stopped by an annular ring 32 in which a water-stop ring 30 is embedded is installed between the water-blocking sheet 18 and the ground 1 in such a state that the pile 24 penetrates the water-blocking sheet 18.
4 to support the artificial ground surface 42, it can be applied to large-scale waste disposal sites.

Furthermore, if a water collection pit 34 and a water-permeable sheet 40 are provided on the water-shielding sheet 18 at the lowest position of the recess 12, a very small amount of leachate, such as water decomposed from the waste 10, can also be discharged to the outside. can.

In the above embodiment, a disposal site in which the artificial ground surface 42 is supported by the piles 24 is illustrated, but the artificial ground surface 42 can be constructed without providing the piles 24 in a relatively small-scale disposal site.

Further, the water collection pit 16 for groundwater is not required in the ground 14 where the groundwater level does not rise.

Furthermore, if the waste 10 contains little water, there is no need for a collection pit 34 for leachate either.

FIG. 5 shows a second embodiment of the invention, and only its features will be described below.

In the embodiment shown in the figure, a water-stopping wall 60 is used as a water-blocking structure instead of the water-blocking sheet 18 described above.

The cutoff wall 60 is constructed to a depth that reaches the impermeable layer 62 in the ground 14 so as to surround the outer periphery of the recess 12 before or after excavation.

Here, the water-stop wall 62 is constructed by, for example, a sheet pile method such as a steel sheet pile or a steel pipe sheet pile, a columnar or wall-like continuous underground wall method, or various grout methods.

In addition, the artificial ground surface 42 provided above the recess 12 is
Although it may be supported by the piles 24 as in the first embodiment, in this embodiment it is supported by a wall body 64 including pillars formed in an annular or lattice shape.

Furthermore, an open input port 66 for the waste 10 is provided in the artificial ground 42, and an enclosed building 68 is installed on the upper outer periphery of the input port 66 through which a dump truck for transporting the waste 10 can pass. With this configuration, an opening and closing opening similar to that of the above embodiment is provided.

In the waste disposal site constructed as described above, the same effects as in the first embodiment can be obtained, and the recess 12 that accommodates the waste 10 is covered with a water-stop wall 60 on the side. Since the bottom of the recess is covered with the impermeable layer 62, there is no need to lay a water-blocking sheet inside the recess 12.

FIG. 6 shows a third embodiment of the present invention.
a is used.

Before excavating the recess 12, the cut-off wall 60a is constructed in an annular manner to a depth that reaches the impermeable layer 62 in the same manner as in the second embodiment, and after the cut-off wall 60a is constructed, its interior is impregnated. The waste 10 is removed by excavating until the permeable layer 62 is reached.
A recess 12 for accommodating the water is formed, and the water stopper 160a also serves as an earth retaining wall of the recess 12.

Furthermore, between the water cutoff walls 60a, an intermediate support F0 is provided to reinforce the water cutoff walls 60a.
It is not necessarily necessary when a has a circular cross section.

An artificial ground surface 42 is constructed on the recess 12 thus formed in the same manner as in the above embodiment, and the ground surface 42 is connected to the wall 6.
4 or 24, and a waste 10 input port (not shown) that can be opened and closed is provided at an appropriate location.

In the waste disposal site created by the above method, the same effects as in the second embodiment can be obtained.

In the second and third embodiments, for example, if the depth of the impermeable layer 62 is quite deep or if the impermeable layer 62 has insufficient water-stopping properties, the impermeable sheet 18 may be placed in the recess 12. It may be installed.

Moreover, depending on the type of waste 10, water-blocking surfaces such as the water-blocking sheet 18 and the water-blocking wall 60 are not necessarily required.

Furthermore, the artificial ground surface 42 includes the piles 24 . In addition to being supported by the walls 64, it may be supported by wires in the form of a suspension bridge, or by diagonal piles 70 as shown in FIG.

[Brief explanation of the drawing]

Figure 1 is an overall cross-sectional view showing an example of a waste disposal site constructed using the method of the present invention, Figure 2 is a cross-sectional view showing a water-stopping structure between a water-blocking sheet and piles, and Figure 3 is an artificial ground surface. 4 is an explanatory diagram of the waste inlet, FIG. 5 is a sectional view showing the second embodiment of the method of the present invention, and FIG. 6 is the third embodiment of the same method. The sectional view and FIG. 7 are explanatory diagrams showing the fourth embodiment. 10・・・・・・・・・・・・Waste 12...
・・・・・・・・・・・・Recess 14・・・・・・・・・
・・・・・・Ground 18・・・・・・・・・・・・・・・
Water-shielding sheet (water-shielding top) 24・・・・・・・・・・・・・
...Pile 34...Water collection pit 40...Water permeable sheet 42.
・・・・・・・・・・・・Artificial ground surface 46.66・
・・・・・・Inlet 60.60a・・・Water-stop wall (water-blocking top) 64・・・・・・・・・・・・Wall body Figure 2 Figure 4 Figure 5 etc. 6 Figure 7 M2 Procedural amendment band (voluntary) July 4, 1988 Director General of the Japan Patent Office Yoshi 1) Takeshi Moon 1, Indication of the incident Patent Application No. 132595, filed in 1988 2, Name of the invention Waste disposal site Method of creation 3, relationship with the case of the person making the amendment Patent applicant address 3-37 Kyobashi, Higashi-ku, Osaka-shi, Osaka Name (
054) Obayashi Gumi Co., Ltd. 4, Agent address: 7th floor, Rokin Shinbashi Building, 2-12-7 Shinbashi, Minato-ku, Tokyo Phone: 508-0336 Name (7)
128) Patent Attorney - Mr. Kensuke Iro
Name (8768) Patent Attorney Miyabi Matsumoto
F-5. In column 6 of "Claims" of the specification to be amended, amend the claims of the description of contents of the amendment as shown in the attached sheet. Claims (1) In a method for constructing a waste disposal site in which waste is sequentially introduced into a recess, the waste disposal site is provided with an openable and closable waste input port before the waste is introduced into the recess; A method for constructing a waste disposal site, characterized by constructing an artificial ground surface that covers the entire upper part. (2) The method for constructing a waste disposal site according to claim 1, wherein the artificial ground surface is supported by a plurality of piles or walls penetrated into the ground below the recess. (3) The method for constructing a waste disposal site according to claim 1 or 2, characterized in that a water barrier is provided in the recess. (4) The method for constructing a waste disposal site according to claim 3, wherein the water-blocking work comprises a water-blocking sheet laid within the recess. (5) The waste disposal method according to claim 3, wherein the water-blocking structure is constructed of a water-blocking wall that is constructed to surround the outer periphery of the recess and reaches an impermeable layer in the ground. How to create a place.

Claims (5)

[Claims] (1) In a method for constructing a waste disposal site in which waste is sequentially introduced into a recess, before the waste is introduced, the waste inlet is provided with an openable and closable inlet, and the entire upper part of the recess is closed. A method for constructing a waste disposal site, characterized by constructing a covering artificial ground surface. (2) The method for constructing a waste disposal site according to claim 1, wherein the artificial ground surface is supported by a plurality of piles or walls penetrated into the ground below the recess. (3) The method for constructing a waste disposal site according to claim 1 or 2, wherein the recess is provided with a water-blocking structure around its outer periphery. (4) The method for constructing a waste disposal site according to claim 3, wherein the water-blocking work is comprised of a water-blocking sheet laid over the entire inner surface of the recess. (5) The waste according to claim 3, wherein the water-blocking structure is constructed of a water-blocking wall that is constructed to surround the outer periphery of the recess and reaches an impermeable layer in the ground. How to create a disposal site.