JP2007105598A - Structure of final waste disposal site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a final waste disposal site, which can monitor directly whether exuding water from a pit leaks or not and whether a water barrier member is damaged or not. <P>SOLUTION: The structure of the final waste disposal site is provided with: the pit 11 for accumulating waste 10; and a first water barrier member 12 and a second water barrier member 13 arranged doubly at the bottom of the pit at the least in order to prevent the exuding water in the pit 11 from leaking to the outside. A monitoring space 14 is arranged between the first water barrier member 12 and the second water barrier member 13 so that whether the exuding water in the pit 11 leaks or not and the first and second water barrier members 12, 13 are damaged or not tored visually. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to the structure of a waste final disposal site.

  This final disposal site is obliged to have a water shielding structure to prevent leakage of leachate in the landfill where the waste is landfilled and to prevent contamination of groundwater and public water areas.

  Conventionally, even if the above-mentioned water-blocking structure is damaged for some reason, the water-blocking structure is appropriately controlled by electrical leakage detection technology or physical detection technology in order to minimize leakage of leachate in the landfill. Monitoring of the presence or absence of damage and identification of the damage location are performed. In addition, monitoring of leakage of leachate by the water quality survey method and the water balance method is also carried out.

  In addition, when leakage of leachate occurs, a highly water-absorbing resin, bentonite or the like absorbs and swells leachate and adopts a self-repair sheet that seals the damaged portion.

  However, all of the conventional techniques for monitoring the presence or absence of damage to the water-impervious structure at the final disposal site or identifying the location of the damage indirectly monitor the leakage of leachate. I couldn't confirm that it wasn't happening.

  In addition, when damage to the impermeable structure is detected, difficult work such as excavating waste in the pits at the final disposal site occurs to repair the impermeable structure, which takes time. was there.

  Furthermore, since a certain construction period is required to repair the water-impervious structure as described above, leakage of leachate in the pit to the outside may progress during that period.

  This invention is made | formed in view of such a problem, and makes it a subject to provide the structure of the waste final disposal site which can monitor directly the presence or absence of damage of a water-impervious structure, or the presence or absence of the leakage of leachate.

The present invention employs the following means in order to solve the above problems.
(1) The present invention
A pit that accumulates waste,
In order to prevent the leachate in the pit from leaking to the outside, at least a first water shielding member and a second water shielding member provided double at the bottom of the pit,
A monitoring space for monitoring leakage of leachate in the pit or damage to the first and second water shielding members is provided between the first water shielding member and the second water shielding member. It is characterized by.

  In the present invention, leakage of leachate in the pit and the presence or absence of damage to the first and second water shielding members can be directly and visually monitored from the monitoring space.

  (2) It is preferable that the first and second water shielding members and the monitoring space are provided on a side portion of the pit.

  In this case, leakage of leachate in the pits at the side of the pit and the presence or absence of damage to the first water shielding member or the second water shielding member can be directly visually monitored.

  (3) It is preferable that the monitoring space has a size that allows an observer to pass through. In this case, the supervisor can enter the monitoring space and directly monitor the leakage of the leachate in the pit and the presence or absence of damage to the first or second water shielding member.

  (4) The first water-impervious member or the second water-impervious member is usually used as a water-impervious material for final disposal sites, such as steel materials, water-impervious concrete, water-impervious sheet, asphalt concrete, and soil-based materials such as clayey soil. Can be formed of the materials that are used, or combinations thereof.

  (5) It is preferable that an elevating means is provided which continues from the upper side of the pit into the monitoring space.

  (6) It is preferable that an entrance for entering the monitoring space is provided outside the pit.

  As described above, according to the present invention, the leakage of leachate in the pit at the final disposal site and the presence or absence of damage to the first water shielding member and the second water shielding member can be directly and visually monitored. Will improve.

  In addition, when the first impermeable member or the second impermeable member is damaged, the first impermeable member or the second impermeable member can be repaired from within the monitoring pit, so that the waste in the pit is excavated. There is no need to do. Accordingly, the number of work steps can be greatly reduced, and the repair work of the first water-impervious member and the second water-impervious member can be visually recognized. Therefore, a smooth and reliable process can be performed, and the first water-impervious member and the second water-impervious member. Until the measure against the malfunction of the water shielding member, the leaked leachate can be easily treated appropriately, and sufficient verification can be performed for the reliability after the treatment. Therefore, the leachate can be reliably prevented from leaking outside the landfill.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a waste final disposal site 1 as an embodiment to which the structure of the waste final disposal site according to the present invention is applied. This waste final disposal site 1 is a final disposal site with a cover facility (roof) called a closed type.

  The waste final disposal site 1 includes a pit 11 for accumulating waste 10 and a first water shielding member 12 and a second water shielding member 13 provided at least in the bottom of the pit 11. .

  Further, the waste final disposal site 1 of the present invention has a leakage of leachate contained in the waste 10 in the pit 11 between the first water shielding member 12 and the second water shielding member 13, or A monitoring space 14 for monitoring whether the first water shielding member 12 and the second water shielding member 13 are damaged is provided.

  Next, each of the above components will be described. A roof 18 is provided on the upper side of the pit 11.

Further, retaining walls 19 and 20 are provided on both sides of the pit 11. These earth retaining walls 19 and 20 can be formed by a parent pile steel sheet pile, a continuous underground wall, a steel sheet pile, a steel pipe sheet pile, a reinforced concrete structure, or the like.

  The pit 11 can also be formed by a soil structure such as a natural or artificial slope or reinforced soil.

  On one inner side of the earth retaining wall 19, an elevating staircase 15 that extends from the upper side of the pit 11 into the monitoring space 14 is provided.

  The said 1st water-impervious member 12 and the 2nd water-impervious member 13 are formed with the steel plate (thickness 6 mm or more), as shown in FIG.

  The first water shielding member 12 has a structure that prevents the leachate in the pit 11 from flowing out. Waste 10 is accumulated inside the first water shielding member 12.

  In addition, the 1st water-impervious member 12 is a material used as a water-impervious member in a normal final disposal site other than a steel plate, for example, water-impervious concrete, water-impervious sheet, asphalt concrete, soil-based material (such as viscous soil), etc. Or a combination thereof. Moreover, when forming the 1st water-impervious member 12 with a steel plate and water-impervious concrete, it can serve as the structure for ensuring the space 14 for monitoring.

  Furthermore, when using asphalt concrete, a water-impervious sheet, a soil type material (viscous soil etc.) etc. for the 1st water-impervious member 12, the 1st water-impervious member 12 is separately supported by a steel structure or a concrete structure. It is necessary.

  The second water-impervious member 13 is not only a steel plate but also a material used as a water-impervious member in a normal final disposal site, for example, water-impervious concrete, water-impervious sheet, asphalt concrete, soil-based material (such as viscous soil), Or it can form by the combination of these.

  In the monitoring space 14, a monitoring person enters between the first water shielding member 12 and the second water shielding member 13, and the state of the first water shielding member 12 and the second water shielding member 13 is directly monitored visually. It is provided as a space where you can.

  In this monitoring space 14, a monitoring person 22 enters and can directly monitor the leakage of leachate in the pit 11 and the presence or absence of damage to the first water shielding member 12 and the second water shielding member 13. .

  Further, when leakage of leachate from the first water shielding member 12 or damage to the first water shielding member 12 or the second water shielding member 13 is found, appropriate measures are taken from the monitoring space 14, Repair for preventing leakage of leachate and damage to the first and second water shielding members 12 and 13 can be repaired.

  Even if the leachate in the pit 11 leaks, the leachate is easily treated between the first impermeable member 12 and the second impermeable member 13 during the period of repairing the damage. It is possible to prevent the leakage to the outside of the final waste disposal site 1.

  Furthermore, since the operator can perform the repair work of the first and second water-impervious members 12, 13 while visually checking the first and second water-impervious members 12, 13, the repair work can be performed smoothly and reliably. At the same time, the repaired part can be sufficiently verified and the reliability is improved.

In addition, the monitoring space 14 can be constructed with various facilities for citizen participation as necessary, as long as the function for monitoring is not impaired. It can also be used as a safe and secure facility that can confirm the soundness of the plant.

  Further, an elevator or the like can be used in place of the stairs 15. Further, an entrance to the monitoring space 14 can be provided outside the pit 11.

  Thus, since the waste final disposal site 1 of the present invention provided the monitoring space 14 between the first water-impervious member 12 and the second water-impervious member 13, the monitoring person 22 enters this, The leakage of leachate in the pit 11 and the presence or absence of damage to the first water-impervious member 12 and the third water-impervious member 13 can be directly monitored. Therefore, the reliability with respect to the waste final disposal site 1 is improved.

  In addition, when leakage of leachate from the pit 11 or damage to the first water shielding member 12 or the second water shielding member 13 is confirmed, the repair work can be easily performed from the monitoring space 14.

  In addition, although this embodiment demonstrated the case where this invention was applied to the waste final disposal site 1 with the covering facility (roof) called a closed type, this invention is the final disposal site called an open type without a covering lid, This can be applied to other landfill sites when renewing the final landfill site and the existing landfill site.

  In the present embodiment, the first water shielding member 12, the second water shielding member 13 and the monitoring space 14 are provided only at the bottom of the pit 11. However, a monitoring space is also provided at the side surface of the pit 11. Can do. In addition to this, it is needless to say that a specific detailed structure can be appropriately changed.

It is sectional drawing which shows the waste final disposal site to which the structure of the waste final disposal site which concerns on this invention is applied. It is sectional drawing which shows the 1st water shielding member and 2nd water shielding member which concern on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waste final disposal site 10 Waste 11 Pit 12 1st water shielding member 13 2nd water shielding member 14 Monitoring space 15 Stairs 18 Roof 19 Earth retaining wall 20 Earth retaining wall 22 Surveillant

Claims (6)

A pit that accumulates waste,
In order to prevent the leachate in the pit from leaking to the outside, at least a first water shielding member and a second water shielding member provided double at the bottom of the pit,
In order to visually monitor the leakage of leachate in the pit and the damage of the first and second impermeable members between the first impermeable member and the second impermeable member. Structure of waste final disposal site, characterized in that a space is provided.   The structure of the waste final disposal site according to claim 1, wherein the first water-impervious member, the second water-impervious member, and the monitoring space are provided in a side portion of the pit.   The structure of the waste final disposal site according to claim 1 or 2, wherein the monitoring space has a size that allows an observer to pass through.   The first water-impervious member or the second water-impervious member is usually used as a water-impervious material for final disposal sites, such as steel plates, water-impervious concrete, water-impervious sheet, asphalt concrete, and soil-based materials such as clay soil. The structure of the waste final disposal site according to any one of claims 1 to 3, wherein the structure is formed of a material or a combination thereof.   The structure of the waste final disposal site according to any one of claims 1 to 4, further comprising lifting means that extends from the upper side of the pit into the monitoring space.   The structure of the final disposal site according to any one of claims 1 to 5, wherein an entrance for entering the monitoring space is provided outside the pit.

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