JP2002159931A - Execution method for landfill disposal site - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an execution method for a landfill disposal site which is capable of adequately dealing with an uncertain landfill amount of wastes, reducing a cost and shortening a work period. SOLUTION: In this execution method for the landfill disposal site, a divided execution work system is adopted for disposal vessels 1 and 2, and while disposal vessels 7 are gradually increased under occasional prediction of the amount of the wastes to be produced, upper roofs 6 are built to the minimum number of a moving system so as to deal with the extended disposal vessels. Landfill work, work to shut off the upper parts of the wastes and the increase of disposal vessels are implemented in combination, by which the transportation and disposal of mineralization muck cars and the excessive design of the disposal site are eliminated. In addition, the need for water treatment facilities and drainage facilities is eliminated, by which the long-term safety is assured while an execution cost and maintenance are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a landfill disposal site, and more particularly, to expanding a disposal site appropriately according to the amount of waste discharged on site without constructing a vast disposal site facility. The present invention also relates to a method for constructing a landfill site in which waste is buried in an appropriate disposal site facility and construction work is rapidly performed.

[0002]

2. Description of the Related Art When the total amount of waste is uncertain, such as when only the waste generated at an arbitrary construction site is discarded, while the target object of disposal and the person who disposes of the waste or the disposal period are limited. The following disposal methods are applied.

(1) When mineralization occurs during excavation of a tunnel, drilling is performed at several places to estimate the amount of landfill as a preliminary survey before construction, and the excavation waste is determined visually or by a dissolution test. After disposing.

[0004] Disposal forms can be broadly classified into a method of carrying out to the outside and a method of disposing on-site, and the following forms are considered. Transport and landfill at an external closed disposal site.
In this method, only mineralized waste is transported to a treatment plant that does not come into contact with water, and other waste is treated at a waste disposal site built on site. Transport and landfill at an external managed landfill. In this method, mineralized waste comes into contact with water such as rainwater. Build a closed disposal site on site and landfill. Construct a managed landfill on site and landfill.

[0005] However, in the above case, since the transportation and disposal from the site are involved, the cost required for the transportation is high and the possibility of affecting the excavation work cycle is high.

Also, in the above case, since a disposal site is constructed by estimating only the amount of disposal based on a preliminary survey, the construction cost is wasted when the actual amount is smaller than the estimated amount. In the case of a managed disposal site, there is a need to operate the water treatment facility for a long time.

(2) When mineralization waste occurs during excavation in a mine, in this case, the final residue is disposed after various separation steps. The disposal form in this case is divided into the following methods. After mining is completed, the mine is backfilled and the pit is closed.
In this method, a predetermined number of borings are performed for a preliminary survey before work, and the amount of landfill is estimated. Build a dump site on site and landfill. In this case, soil covering and planting are performed after the completion of the landfill, and the neutralization treatment of the mine wastewater is continuously performed.

[0008] In the above case, the groundwater generated in the mine when it is disposed in the pit after mining comes into contact with the waste. Safety and economy may be poor.

Further, in the above case, the same indication as in the above-mentioned (1) On-site treatment in tunnel excavation has been made.

[0010] As shown in Fig. 7, the conventional management type disposal site has been constructed in a lump sum of the initially planned scale. For this reason, the management type disposal site 30
A vast landfill area 32 of 0 m × 200 m or the like is excavated and built, and a bottom 33 is laid on the excavated surface, and at the same time, the periphery is partitioned by a side wall 34.

At the center, a partition wall 35 is provided as necessary, and an upper roof 36 is formed. At this time, the upper roof 36 must be installed in the entire area to be reclaimed. The construction was an extremely large-scale construction.

[0012] On the other hand, tunnel excavation work is carried out in a managed disposal site 3
The construction of the tunnel excavation will be inevitably extended since the construction will be started after the completion of the project and the overcapping work after the completion of the landfill will be extensive. I was

That is, the construction period is as shown in FIG.
The construction of the landfill will begin at the beginning of the first year, and after completion, the construction will proceed to tunneling and landfilling and will continue for several years. After that, even after the completion of the tunnel construction, the disposal site has been over-capped, and this is the first time that all construction will be completed.

Another concern is that the final disposal amount is smaller than the estimated amount because the disposal amount is uncertain because the target of landfill disposal is a tunnel excavation waste. In addition, there are many aspects where the risk of over-design and the risk of breakage in the overcap depend on the vast area are large, so it is also difficult to ensure safety at the disposal site, The solution was longing.

[0015]

DISCLOSURE OF THE INVENTION The present invention is a proposal of a result obtained by studying in view of the above-mentioned situation. The present invention divides and constructs a closed-type disposal site around a site and predicts a disposal amount at any time. In addition, it is possible to increase the disposal site space by making it into a shape that matches the terrain conditions, and by performing the landfill work and overcapping work concurrently by moving the upper roof, the uncertainty of waste The present invention provides a construction method for a landfill site that can appropriately address the amount of landfill, reduce costs and shorten the construction period.

[0016]

According to the first aspect of the present invention, there is provided a method for constructing a landfill disposal site, comprising: a first step of constructing at least two landfill disposal tanks each having a roof; The second step of landfilling the waste in the tank, the third step of coating the waste on one landfill disposal tank and reclaiming the waste that continues into the other landfill tank, adjacent to one landfill disposal tank 4th process of moving the roof from one landfill disposal tank, constructing an additional landfill disposal tank as needed, and covering the waste from the other landfill disposal tank. Landfill waste that continues in the fifth
Process 6, the additional landfill disposal tank is constructed as needed next to the other landfill disposal tank, and the roof is relocated from the other landfill disposal tank, the sixth step, the landfill waste of the additional landfill disposal tank And a step of landfilling waste that continues into the additional landfill disposal tank and, if necessary, gradually repeating the above fourth and fifth steps. Long-term safety is secured while reducing construction costs and maintenance by eliminating the need to transport and dispose of waste and over-designing the disposal site and eliminating the need for water treatment and drainage facilities.

According to a second aspect of the present invention, there is provided a method for constructing a landfill disposal site according to the first aspect, wherein the construction of the additional landfill disposal tank is performed by excavating excavated earth and sand. It is implemented based on the estimated amount of waste separated from, and, in addition to the above functions, manages more plans for increasing the disposal site.

According to a third aspect of the present invention, there is provided a method for constructing a landfill disposal site according to the first or second aspect, wherein the landfill disposal tank comprises a bottom plate, a side wall, and an adjoining landfill. It is composed of a partition wall with a landfill tank, and the partition wall is shared between adjacent landfill tanks.
In addition to the above function, the construction cost of the disposal site is reduced by making the landfill disposal tank to be added U-shaped or L-shaped and omitting the addition of the partition walls.

According to a fourth aspect of the present invention, there is provided a method for constructing a landfill disposal site according to any one of the first to third aspects, wherein the landfill disposal tank has a rectangular shape. It is characterized in that it is formed and expanded in a desired direction. In addition to the above functions, a disposal site can be arbitrarily added according to the geographical conditions at the site.

According to a fifth aspect of the invention, there is provided a method for constructing a landfill disposal site according to any one of the first to third aspects, wherein the landfill disposal tank is formed in an arc shape. It is characterized by forming and expanding in a circular direction,
In addition to the above functions, disposal sites can be arbitrarily expanded according to the geographical conditions at the site.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction method of a landfill site according to the present invention basically comprises constructing at least two landfill tanks each having a roof and reclaiming waste from one of the landfill tanks. Therefore, one of the landfill tanks is covered with the waste, and the waste that continues to the other landfill tank is landfilled.

Thereafter, if additional landfill is required, an additional landfill disposal tank is constructed adjacent to one of the landfill disposal tanks, a roof is transferred from one landfill disposal tank, and the other is disposed of. In addition to covering the landfill waste in the disposal tank, the waste that continues to the additional landfill disposal tank is landfilled.

If further expansion is necessary, an additional landfill disposal tank is further constructed adjacent to the other landfill disposal tank, and a roof is relocated from the other landfill disposal tank. It covers the buried waste in the disposal tank, and also reclaims the waste that continues into the additional landfill disposal tank, and if necessary, comprises a step of gradually repeating the above-mentioned additional step.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention for disposing of mineralized waste generated in tunnel construction in accordance with work steps.

As shown, the disposal operation according to the present invention comprises:
An initial plan is planned based on construction data such as tunnel specifications, topography, and geological conditions. The initial plan starts from the initial estimation of the amount of mineralized waste by a preliminary survey, and is planned for the listed items as shown in the figure, and a quantitative initial value is determined by an optimization method.

Next, following the commencement of the construction of the first disposal tank, an advanced survey boring is performed, and a tunnel excavation work is also performed. Mineralized waste discharged from the tunnel excavation is reclaimed in a disposal tank, and after the completion of the reclaiming of each section, the final covering is performed to complete the first stage disposal.

Based on the results of the drilling and the excavation of the tunnel, the amount of mineralized waste generated is estimated, and it is examined whether the construction of the next disposal tank is necessary.

If it is necessary to increase the number of disposal tanks as a result of the examination, the additional disposal tanks are started toward the second stage, and the same steps as in the first stage are repeated.

The continuation of landfill disposal and the trends in the amount of landfills are comprehensively judged, and the disposal tank construction plan is revised, but the disposal work is eventually completed when the generation of mineralized waste converges. I do.

FIGS. 2, 3, and 4 schematically show a specific embodiment of the disposal site. In this embodiment, the disposal tank to be initially constructed has a disposal tank of the same shape as shown in FIG. Two disposal tanks 1 and 2 have bottom plate 3
The partition wall 5 formed in the adjacent portion functions as a common side wall while the periphery is surrounded by the side wall 4.

In each disposal tank, a movable upper roof 6 is arranged to shield rainwater, and when a disposal tank of the same shape is added adjacently in the future as will be described later, an additional disposal tank is installed. Is installed to shield the additional disposal tank from rainwater.

In the first stage, the mineralized waste is carried into the disposal tank 1 and landfilled, and upon completion of the landfill, the surface of the landfilled mineralized water is covered in a watertight manner. When the mineralized waste to be carried becomes full in the disposal tank 1, the transport of the mineralized waste to the disposal tank 2 is started simultaneously with the coating.

At this stage, if it is estimated that the amount of generated waste cannot be completely disposed of even if landfilled in the disposal tanks 1 and 2, FIG.
As shown in (1), a disposal tank 7 having the same shape as the disposal tank 1 is added adjacent to the disposal tank 1. In this case, the additional landfill disposal tank 7 is formed into a U-shape, and the side wall 4 corresponding to the adjacent part of the disposal tank 1 is formed.
Is constructed so as to function as the above-described partition wall 5, thereby suppressing an increase in the extension cost.

In the second stage, the transfer of mineralized waste to the disposal tank 2 and the addition of the disposal tank 7 are performed in parallel, and although not shown, the construction of the disposal tank 7 is awaited. The movable upper roof 6 is relocated from the disposal tank 1 and rainwater
Immediately shield from entering.

FIG. 4 shows a state where the mineralized waste carried into the disposal tank 1 and buried is covered 8 with water-tight surface.
At the same time as the introduction of mineralized waste to the disposal tank 2 is continued under the mobile upper roof 6, the additional disposal tank 7 is shielded by the mobile upper roof 6, and in addition, the amount of mineralized waste generated is estimated. In order to conform to the above, a state is shown in which a disposal tank 9 having the same shape as that of the disposal tank 2 is extended from the side wall 4 to the partition wall 5 so as to be adjacent to the disposal tank 2.

Accordingly, the extension work after the third stage is carried out at low cost by constructing the landfill disposal tank 9 to be extended in the same manner as described above in an L-shape and omitting the addition of bulkheads. After the completion of the landfill in step 2 and the completion of the work for water-tightly covering the surface of the mineralized waste, the movable upper roof 6 is moved from the disposal tank 2 to the additional disposal tank 9.

Therefore, at the stage where the operation of landfilling the mineralized waste into the disposal tank 2 and covering the surface thereof in a watertight manner is completed, the mineralized waste is carried into the additional disposal tank 7.
Subsequent work can be dealt with by repeating the expansion at any time according to the estimated amount of mineralized waste.

In the construction method according to the present invention, as shown in FIG. 5 as compared with the conventional construction, not only the construction of the disposal site is shortened, but also the start of the tunnel construction is accelerated, and even after the completion of the tunnel construction, The post-treatment at the disposal site is completed by surface coating of mineralized waste at a small-scale disposal site that is divided, so that the overall construction period can be significantly reduced.

As described above, in the disposal method of the landfill site according to the present invention, the following basic idea is embodied to appropriately cope with the uncertain landfill amount of waste at the construction site. It is possible to avoid the risk of breakage in the upper cutoff, reduce costs and shorten the construction period. The disposal site will be divided into separate construction methods. The disposal tanks will be gradually increased while predicting the amount of waste generated as needed. The upper roof will be constructed with a minimum number of movable units to accommodate additional disposal tanks. Landfill work, upper cutoff work for waste, and additional disposal tanks will be implemented in parallel.

In the method for constructing a landfill disposal site according to the present invention, the disposal site is divided into a plurality of sites, and the number of the sites is gradually increased so that the amount of generated mineralized waste is finely dealt with, thereby preventing overdesign. However, this division also has the advantage that the landfill disposal can be expanded in any direction according to the topographical conditions and in any shape.

FIG. 6 shows an embodiment of the additional disposal tank as described above. FIG. 6 (a) shows the correspondence of the disposal site in the area to be expanded, and FIG. 6 (b) is a summary. This is the formation of a disposal tank on a rough terrain. Further, FIG. 6 (c) shows an embodiment in which a circular disposal facility is constructed by adding an arc-shaped disposal tank.

FIG. 6A shows an embodiment in which additional disposal sites different from those shown in FIGS. 3 and 4 are added to the disposal tanks 1 and 2 serving as bases.

In the present embodiment, since it is required to expand the disposal site in a small area, the first expansion is performed in the disposal tank 10.
The second additional disposal tank 11 is constructed in the direction orthogonal to the disposal tank 2 while the second additional disposal tank 11 is constructed in the direction orthogonal to the disposal tank 1, and the third additional disposal tank 12 is placed in the second extension disposal tank 11 from the additional disposal tank 10.
The movable upper roof has been relocated smoothly to each of them.

FIG. 6 (b) shows an embodiment in which more disposal sites are added than in the example of FIG. 6 (a).

In this embodiment, more disposal tanks are constructed while increasing the number of disposal tanks in a consolidated area. The first additional disposal tank 13 is constructed in the direction orthogonal to the disposal tank 1, the second additional disposal tank 14 is built in an extension direction from the disposal tank 2, and the third additional disposal tank 15 is constructed from the additional disposal tank 13. It is built in parallel with the disposal tanks 1 and 2, and the fourth additional disposal tank 16 extends from the additional disposal tank 14 in a direction orthogonal to the additional disposal tank 14.

FIG. 6 (c) is an example of a circular shape different from FIGS. 6 (a) and 6 (b), and is an embodiment in which the device is built in a specific area.

The base disposal tanks 17, 18 are arc-shaped, and constitute a part of a circular shape adjacent thereto. Similar to the construction method described above, landfilling of mineralized waste in the disposal tank 17 is started, and when this is full, the top surface is covered and landfilling in the disposal tank 18 is started. ,
Disposal tank 1 in the direction of arrow 19 based on the prediction of the amount of waste generated
An arc type disposal tank having the same shape as that of 7 is added.

In the construction of these arc type disposal tanks, if the amount of waste generated is further predicted, the extension in the direction of the arrow 20 will be continued after the extension in the 19 direction, and the completed circular disposal site will be completed. It will be continued until completed.

As described in the above embodiment, the landfill disposal site according to the present invention is not limited to the above-mentioned embodiment, and the landfill operation, the upper cutoff operation of the waste, and the disposal tank are performed irrespective of the above embodiment. Various polygons can be configured without departing from the basic idea of relocating the upper roof by performing the extension in parallel.

As described above, the present invention has been described in detail based on the embodiments. However, the method for constructing a landfill disposal site according to the present invention is not limited to the above-described embodiments, and the gist of the present invention is as follows. It is needless to say that various changes can be made without departing from the scope of the present invention.

[0052]

According to the construction method of a landfill disposal site according to the first aspect of the present invention, the disposal tank is divided and the disposal tank is gradually increased while predicting the amount of generated waste as needed. Conveying and disposing of mineralized waste by constructing the minimum number of movable roofs to accommodate the additional disposal tanks and carrying out reclamation work, upper cutoff of waste, and additional disposal tanks in parallel In addition to eliminating over-design of the disposal site and eliminating the need for water treatment and drainage facilities, long-term safety is ensured while reducing construction costs and maintenance, and waste By properly coping with the determined landfill amount, it is possible to avoid the risk of breakage in the upper blockage, reduce costs and shorten the construction period.

According to a second aspect of the present invention, there is provided a method of constructing a landfill disposal site, wherein the construction of the additional landfill disposal tank is performed by excavating excavated earth and sand. It is characterized by the fact that it is implemented based on the estimated amount of waste separated from the wastewater, and in addition to the above effects, it has the effect of more appropriately managing the plan for increasing the disposal tank.

According to a third aspect of the present invention, there is provided a method for constructing a landfill disposal site according to the first or second aspect, wherein the landfill disposal tank comprises a bottom plate, a side wall, and an adjoining landfill. It is composed of a partition wall with a landfill disposal tank, and the partition wall is shared between adjacent landfill disposal tanks. In addition to the above effects, the additional landfill disposal tank can be U-shaped or L-shaped. The effect of reducing the construction cost of the disposal site is demonstrated by omitting the addition of bulkheads.

According to a fourth aspect of the present invention, there is provided a method for constructing a landfill disposal site according to any one of the first to third aspects, wherein the landfill disposal tank is formed in a square shape. Since it is characterized in that it is formed and expanded in a desired direction, in addition to the above-mentioned effects, it has the effect that a disposal site can be arbitrarily added in accordance with the geographical conditions at the site. Claim 5
The method for constructing a landfill disposal site according to the invention described in claim 1 is a method for constructing a landfill disposal site according to any one of claims 1 to 3, wherein the landfill disposal tank is formed in an arc shape in a circular direction. Since it is characterized by extension, in addition to the above-mentioned effects, it is possible to arbitrarily increase the number of disposal sites according to the geographical conditions at the site.

[Brief description of the drawings]

FIG. 1 is a work process diagram for applying a construction method of a landfill disposal site according to the present invention to tunnel construction.

FIG. 2 is a schematic diagram of a base disposal tank in a method for constructing a landfill according to the present invention.

FIG. 3 is a construction process diagram of an additional disposal tank in the construction method of a landfill disposal site according to the present invention.

FIG. 4 is a construction process diagram of a continuous extension disposal tank in the construction method of a landfill disposal site according to the present invention.

FIG. 5 is a work schedule according to the construction method of the landfill disposal site according to the present invention.

FIG. 6 is an embodiment of a landfill disposal site according to the present invention.

FIG. 7 is an exploded view of a conventional landfill site.

FIG. 8: Work schedule in a conventional landfill site

[Explanation of symbols]

1, 2 disposal tanks, 3 bottom plate, 4 side walls, 5 partition walls,
6 Mobile upper roof, 7, 9-16 Additional disposal tank, 8
Mineralized waste coating, 17, 18 Arc disposal tank, 1
9, 20 Expansion direction, 30 batch disposal site, 31 scheduled construction section, 32 buried area, 33 bottom, 34 side wall, 35 partition, 36 top roof,

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshikazu Otsuka 2-2-2 Matsuzakicho, Abeno-ku, Osaka-shi, Osaka F-term in Okumura Gumi Co., Ltd.

Claims (5)

[Claims] 1. A first step of constructing at least two landfill tanks with a roof, a second step of landfilling waste in one landfill tank, and covering the waste in one landfill tank. At the same time, the third step of landfilling the waste that continues into the other landfill tank, constructing an additional landfill tank as needed adjacent to one landfill tank, and from one landfill tank The fourth step of relocating the roof, the fifth step of covering the buried waste in the other landfill tank, and burying the waste that continues into the additional landfill tank, adjacent to the other landfill tank Construction of additional landfill disposal tanks as necessary, and relocation of roof from other landfill tanks
Step 7, a step of coating the buried waste in the additional landfill tank, and landfilling the waste that continues into the additional landfill tank, and gradually repeating the fourth and fifth steps as necessary. Construction method for landfill sites consisting of: 2. The landfill site according to claim 1, wherein the construction of the additional landfill tank is performed based on an estimated amount of waste separated from excavated excavated earth and sand. Construction method. 3. The landfill disposal tank comprises a bottom wall, a side wall, and a partition wall with an adjacent landfill disposal tank, and the partition wall is shared between adjacent landfill disposal tanks.
Or the construction method of the landfill disposal site according to 2. 4. The landfill disposal tank is formed in a quadrangular shape and is extended in a desired direction.
Construction method of landfill disposal site according to any of the above. 5. The method for constructing a landfill according to claim 1, wherein the landfill is formed in an arc shape and is extended in a circular direction.