JP2003300034A - Closed system waste disposal site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closed system waste disposal site, the roof of which can be more easily assembled and in which water catching/draining and ventilation can be intensively and efficiently performed at one position. <P>SOLUTION: This waste disposal site is provided with a polygonal or cylindrical waste storage tank 2 prepared in an underground part, a culvert type cylindrical pit 6 which is erected at the central position of the tank 2, reaches an earth's surface part and is used commonly for water catching/draining and ventilating the inside of waste disposal site and one or several pillars 11 arrayed linearly above the pit 6 or between the upper part of the pit 6 and the upper peripheral part of the tank 2. A building 3 for covering the upper part of the tank 2 is formed by connecting the upper parts of the pillars 11 or a beam 12 bridged on the upper parts of the pillars 11 to the periphery of the tank 2 and roofing the connected part. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a closed system waste disposal site.

[0002]

2. Description of the Related Art For example, in a waste disposal site, the roof of the disposal site is covered to form a closed system. The advantages of this closed system are
That is, it is possible to reliably prevent the discarded waste from being scattered around and the diffusion of odors to the outside.

Conventionally, in such a closed system disposal site, from the viewpoint of ensuring workability in the disposal site, for example, as shown in FIG. 6, both sides of the disposal site 50 closed by a partition wall are provided without a pillar. An arch-shaped roof frame 51 is constructed straddling, and a roof structure in which a roof membrane (not shown) is stretched on the upper surface of the frame 51 is adopted. Further, in order to achieve early stabilization of landfill waste, a leachate collection / drainage pit 52, a vertical degassing pipe and the like are separately and independently arranged inside the disposal site 50.

[0004]

However, such a closed system disposal site has the following technical problems. First, in a large-capacity landfill disposal site, the roof frame 51 has a large span, and accordingly, a large member strength is required for the roof frame 51, which causes a rise in construction costs. In addition, the leachate collection and drainage pit 52 is of a natural water collection system and is located at the edge of the repository, etc., and collects water by creating a flow as indicated by the arrow in the figure using the slope of the bottom surface. However, in order to make a sufficient drainage gradient to reach the water collection and drainage pit 52, it is necessary to form a slope with a sufficient height difference, which is disadvantageous in that the effective volume of the disposal site is reduced accordingly. Further, it has been pointed out that the landfill area becomes wider or the landfill depth becomes deeper, the efficiency of ventilation in the field decreases.

The present invention has been made to solve the above problems, and an object thereof is to make a roof assembly at such a disposal site simpler and to efficiently collect and discharge drainage and ventilation at one place. It is to provide a closed system waste disposal site that can be done.

[0006]

In order to achieve the above object, the present invention provides a polygonal or cylindrical waste storage tank formed in an underground portion, and a standing surface at a central position of the storage tank. An underdrain-type cylindrical pit that also serves as both collecting and draining water and exhausting air into the field, and one or more columns linearly arranged on the cylindrical pit or between the upper part of the cylindrical pit and the upper part around the storage tank. It is characterized in that a building that covers the upper part of the storage tank is formed by connecting the beams suspended between the pillars and the periphery of the storage tank and connecting them to the roof. Therefore, according to the present invention, since the roof can be hung with a span of about half that of the conventional one, even if the area is large, the member cross-sectional strength can be half that of the conventional one.

The above-mentioned building may be a gable type roof in which a beam is hung on a plurality of pillars and the beam and the periphery of the storage tank are connected in parallel, or a gable type roof may be used. It is also possible to adopt an umbrella-shaped roof in which the upper part of one pillar standing on the pit and the peripheral edge of the storage tank are connected to each other and the roof is hung.

Further, in the present invention, a collecting and draining pipe and a gas suction pipe radially arranged around the lower peripheral edge of the cylindrical pit, a means for discharging leachate collected in the pit to the outside, and a suction in the pit Means and means are provided. Therefore, in the present invention, since there is a pit in the center, it is possible to collect and discharge exhaust gas from each part of the disposal site evenly, and
Since forced intake and forced drainage are performed, there is no need to provide a gradient for drainage, and the absence of a gradient is advantageous in terms of volume.

Further, according to the present invention, a perforated pipe for introducing the outside air, which is sequentially piped radially around the peripheral edge of the cylindrical pit according to the height of the buried waste, and a perforated pipe connected to the perforated pipe to be disposed inside the waste in the site. It is characterized in that an air pressure feeding means for feeding the outside air is provided. Therefore, according to the present invention, the outside air can be uniformly supplied to each part of the disposal site, the propagation of aerobic bacteria in the waste can be promoted, and the waste can be rendered harmless at an early stage.

[0010]

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Figure 1,
2 is a plan view and a sectional view of the closed system waste disposal site according to the first embodiment of the present invention, and FIG. 3 is a perspective view thereof. The disposal site 1 in the figure is constructed in the soil, and waste A
The waste storage tank 2 has a substantially cylindrical shape and is sequentially discarded. The building 3 is located on the ground surface GL and covers the entire upper surface of the storage tank 2.

The storage tank 2 is an RC structure constructed by a normal winding method or an underground continuous wall method, and the bottom plate 4
And a side wall 5 integrated therewith, which is, for example, a large underground structure having a diameter R104 m and a depth H25 m, and a hollow cylindrical pit 6 is erected at the center of the cylinder.

The pit 6 is of a centralized type for both collecting and draining and ventilation, and is continuous from the upper part of the bottom plate 4 to the ground surface part GL, and the upper surface of the pit 6 is covered with a culvert. . The function and role of the pit 6 will be described later.

The building 3 is a gabled roof structure, and as shown in the drawings, the frame is arranged orthogonally to the center of the upper part of the pit 6, and both ends are supported by the peripheral edge of the storage tank 2. Central base 10 and a plurality of pillars 11 arranged on the base 10.
And a central beam 12 arranged on each pillar 11 and a central base 1
At a pair of eaves bases 14 that are parallel to 0 and are arranged around the storage tank 2, the central pillar 11 that is located immediately above the pit 6 and the front and rear pillars 11 positions that are located at the peripheral portion of the storage tank 2, It consists of a beam 12 and a slant beam 15 suspended between the eaves base 14, and a roof membrane (not shown) is stretched on the slant beam 15.
By constructing a wall surface at the gable positions on both sides, the inside of the disposal site 1 is completely closed, and an opening / closing door 16 serving as a carry-in gate is provided on a part of the wall surface. The height h of the building 3 is 5 m at the position of the central beam 12, and is set to a height at which a garbage truck or a transport vehicle can fully enter and leave.

Therefore, by adopting the above-mentioned pillar-beam structure, even if the shielding area in the disposal site 1 by the building 3 is a large area as described above, it becomes half of the conventional span and the cross-sectional strength of each member is increased. Since it never happens, it becomes an economic structure.

Next, the function and role of the pit 6 will be described with reference to FIG. In FIG. 4, the pit 6 is drawn as a square tube type, but the same applies to the case where the pit 6 is a cylindrical type as described above. Multiple drainage pipes consisting of 1
A gas suction pipe 18 and a gas suction pipe 18 that has been started up are radially piped from a box 6 a arranged in the pit 6. The pit 6 is connected to a drainage pump P installed outside the repository through a predetermined piping system (the drainage pump P is arranged at the bottom of the pit 6, that is, below the bottom plate 4, as shown in FIG. 2. You can also)
The box 6a is connected to the exhaust blower B through the exhaust pipe 6b. Downstream of the drainage pump P, wastewater treatment facility 8
And an exhaust treatment facility 9 is connected to the downstream side of the exhaust blower B.

In the above, as the waste A is dumped, the collecting and draining pipe 17 and the gas suction pipe 18 are buried in the waste A. When the exhaust blower B is driven in that state, the pit 6
By connecting the drainage pipe 17 and the exhaust pipe in the inside, the drainage pipe 17 and the gas suction pipe 18 become a negative pressure, and the leachate in the waste A is discharged through the drainage pipe 17 according to this negative pressure. The gas in the waste A is forcibly sent into the pit 6, and the gas in the waste A is also forcibly sent into the pit 6 through the gas suction pipe 18 and the collecting and draining pipe 17.

The gas and the leachate are separated into air and water in the pit 6, and are sent to the wastewater treatment facility 8 and the exhaust treatment facility 9 by the drainage pump P and the exhaust blower B, respectively, for treatment. The wastewater treatment facility 8 is composed of a combination of known treatment means such as calcium removal means, biological treatment means, coagulation sedimentation means, filtration adsorption means, desalination treatment means, etc. Or a secondary treatment such as salt removal treatment.

Further, the exhaust treatment facility 9 is composed of a combination of known exhaust treatment means such as carbon dioxide absorption means, desulfurization means, deodorization means, etc., and is discharged into the atmosphere through these detoxification treatments. .

Next, as the landfill progresses, the outside air perforated pipes 19 are radially arranged around the pit 6. The perforated pipe 19 is directly connected to the air compressor P3 inside the pit 6 through the air pipe system, and when the perforated pipe 19 is buried in the waste A, when the air compressor P3 is driven, outside air is discharged from the perforated pipe 19 to the waste A. It is supplied into the waste A, the inside of the waste A is agitated, the air inside the waste A is circulated, the propagation of aerobic bacteria in the waste is promoted, and the waste is quickly detoxified.

The perforated pipe 19 is sequentially connected to the upper side in accordance with the height of the waste A buried therein, and has a function of sending outside air into the waste A together with the lower side perforated pipe 19. The lower side perforated pipe 19 may be terminated, and in this case, by disconnecting from the air compressor P3 and communicating with the inside of the pit 6, the lower side perforated pipe 19 also functions as a drainage and drainage pipe. . The drain pump P, the exhaust blower B, and the air compressor C described above include a water level sensor, a gas concentration sensor, and the like.
It goes without saying that the drive is controlled according to the detection of the sensors.

FIG. 5 shows a second embodiment of the present invention. In the figure, the building 20 is the same as that of the first embodiment except that it has an umbrella-shaped roof shape. In this case, one central pillar 21 is built at the center of the upper surface of the pit 6 and is provided at the periphery of the storage tank 2. It is constructed by stretching the roof membrane 23 toward the pillar 21 side from the eaves base 22 arranged in an arc shape. In addition, reference numeral 24 in the drawing is an opening / closing door which is provided outside the building 20 and partially constitutes the waste loading port.

In this embodiment, since there is only one pillar, and the roof can be roofed by giving it sufficient proof strength,
Further, the structure becomes simple.

[0023]

As is clear from the above description, in the closed system waste disposal site according to the present invention,
The roof assembly can be done more easily, and the drainage and ventilation can be done efficiently at one place.

[Brief description of drawings]

FIG. 1 is a plan view of a closed system waste disposal site according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a perspective explanatory view of a notch of the same portion.

FIG. 4 is a partially cutaway perspective view showing a pipe in the disposal site.

FIG. 5 is a perspective explanatory view showing a second embodiment of the present invention.

FIG. 6 is a cross-sectional explanatory view of a conventional closed system disposal site.

[Explanation of symbols]

1 waste disposal site 2 waste storage tanks 3,20 building 11 pillars 12 beams 17 Drainage pipe 18 suction tube 19 Perforated pipe for introducing outside air P drainage pump B exhaust blower C air compressor

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) E21D 13/00 (72) Inventor Shigeo Kotake 2-15-2 Konan, Minato-ku, Tokyo Obayashi Corporation Tokyo Book In-house F-term (reference) 2D047 AB02 3E023 AA18 3E070 AA02 AB21 AB40 DA03 PA20 QA04 RA01 RA06 RA08 VA13 4D004 AA46 BB04 CA48 CB50

Claims (5)

[Claims] 1. A polygonal or cylindrical waste storage tank formed in an underground portion, and a culvert type cylinder which is erected at a central position of the storage tank and serves as both collecting and discharging water to the surface of the ground and exhausting air from the site. A mold pit, and one or a plurality of pillars linearly arranged on the cylinder pit or on the cylinder pit and the peripheral upper part of the storage tank, and the beam and the storage tank suspended over the pillar or on the pillar A closed system waste disposal site characterized by forming a building covering the upper part of the storage tank by connecting it to the surrounding area and covering it with a roof. 2. The gable roof according to claim 1, wherein the building is a gable roof in which a beam is hung on a plurality of pillars and the beam and the periphery of the storage tank are connected in parallel to each other. Closed system waste disposal site. 3. The umbrella-shaped roof, wherein the building is a roof hung by connecting the upper part of one pillar standing on a cylindrical pit and the peripheral edge of a storage tank. Closed system waste disposal site described. 4. A collecting and draining pipe and a gas suction pipe which are radially arranged on a lower peripheral edge of the cylindrical pit, a means for discharging leachate collected in the pit to the outside, and a suction means in the pit. The closed system waste disposal site according to claim 1, wherein the closed system waste disposal site is provided. 5. A perforated pipe for introducing outside air, which is sequentially piped radially around the periphery of the cylindrical pit according to the height of the waste to be buried, and external air is introduced into the waste in the site by connecting to the perforated pipe. An air pressure feeding means for feeding the air is provided.
4. Closed system waste disposal site according to any one of 4.