KR0155146B1 - Sealing method for reclamation - Google Patents

Abstract

The present invention relates to the provision of a repellent facility in a reclaimed landfill that is simple in structure and easy to operate and manage while preventing the outflow of leachate from the landfill to the open sea after completion of the landfill disposal.

The waste is dumped at the disposal site adjacent to the lake in the landfill where the landfill is dumped and formed a steel wall with a predetermined gap on the side of the disposal site, and a water supply means is installed in the segment and the water level in the landfill is always disposed of. It was configured to keep above the level in the intestine to block the inflow of wastewater.

Description

Sea level landfill equipment

1 is a general description showing an embodiment of the water repellent equipment of the present invention.

2 is an explanatory diagram showing a specific example of the water supply control system of the present invention.

Figure 3 is an overall explanatory diagram showing an example of the leak prevention means of the conventional leachate.

Figure 4 is an overall explanatory diagram showing a case where the level of the landfill disposal in the conventional spill prevention means is higher than the level of the open sea.

5 is an overall explanatory view showing the order means after completion of landfill in a conventional facility.

* Explanation of symbols for main parts of the drawings

1: Quezon Hoan 2: landfill

3: steel 4: water impermeable layer

5: water treatment facility 6: offshore

7: Waste 8: Oil pipe for rainwater discharge

9: segment 10: level meter

11 controller 12 pump

13 pipe 14 driving part

15: permeable layer 16: rainwater

The present invention relates to a water repellent facility that can prevent the outflow of the leachate from the landfill disposal waste to the sea when the industrial wastes or general wastes are landfilled.

In general, in case of landfill, landfills are first constructed along the boundaries of the planned landfill, and landfills are disposed of by dumping waste within the disposal site.

In addition, there are three known methods for constructing a shelter: ① cell type shelter, ② double steel shelter, and ③ keson shelter, each of which has its own characteristics and is used separately according to the situation of the landfill site.

An important thing to note about such landfills is that the seawater in the landfill and the wastes put into contact with them should be prevented from directly spilling into the open sea from contaminated seawater or shore bottoms. At present, as a means of preventing the spillage of such leachate into the sea in the landfill of wastes, as shown in Fig. 3, the exponent ( A steel material (3) or steel pipe for water is penetrated through the permeable layer 15 of the ground layer to be impregnated with an impermeable layer (permeability coefficient κ = 10 ^-5 cm / sec or less) (4), whereby the leachate in the landfill is discharged to the open sea. The degree of outflow is kept below a certain value.

However, as a countermeasure in FIG. 3, when the water level of the open sea is high, such as at high tide, seawater flows into the landfill from the open sea due to the infiltration from the strata and the penetration of the steel or steel pipes. When the water level in the landfill is high, the possibility of the leachate flowing into the open sea is extremely high. In case of more rainfall than the planned throughput of the water treatment facility, waste input, or failure of the water treatment facility, the water level in the landfill disposal site 2 is higher than the offshore sea 6 as shown in FIG. Leaching liquid from the counter and permeable layer 15 of the c) flows out into the sea (6), and there is a risk of polluting the sea by the harmful substances contained in the waste (7).

In addition, when the water treatment facility is dismantled after the completion of the landfill, as shown in FIG. 5, the rainwater discharge pipe 8 is installed in the landfill, and the rainwater is collected and excluded to prevent an increase in the water pressure due to the level of the landfill. 6) It is possible to prevent the outflow of the leachate into the water. However, in case of heavy rain or low tide, the leachate may leak into the open sea into the open sea as shown in Fig. 4, which also causes pollution of the open sea.

The present invention has been proposed as a countermeasure for the above phenomenon, and after the landfill disposal or completion of landfill, it is possible to reliably prevent the outflow of the leachate of the external sea from the landfill site, and the facility structure is simple, but it is easy to operate and manage the landfill An object of the present invention is to provide a water repellent facility.

In order to achieve the above object, the present invention has been developed as follows.

(1) In the water reclamation facility of a landfill site where a revetment is constructed along the boundary of the planned landfill site and dumped by dumping waste within the planned landfill disposal site, which is blocked from the outside, the double wall is provided at predetermined intervals on the side of the disposal site approaching the lakeshore. A water leveling facility in a reclaimed landfill, characterized in that the upper cutout is formed in steel or the like, and a water supply means is provided in the cutout, and the water level in the cutout is always higher than the level in the landfill.

(2) The water supply means compares at least two level meters for measuring the water level of the landfill disposal site and the water level in the segment with the measured values from these level meters, and gives a water supply instruction to the water supply section at the segment when the difference is a preset value. Ordering equipment having a control unit for emitting.

Since the water supply can be adequately watered in the relatively narrow segment installed between the landfill disposal site and the open sea, the water level in the segment can always be maintained higher than the level of the landfill disposal site. It will leach out at the disposal site, so that no harmful leaching liquid from the landfill disposal site will flow into the open sea. The advantage is that there is no problem because the level in the segment is higher even if the level of the repository is higher than the open sea.

EXAMPLE

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

In FIG. 1, 1 is Quezon Lake, 2 is landfill, 3 is steel, 4 is impervious layer, 6 is open sea, 7 is waste in disposal site, and both are shown in FIG. 3 and FIG. It is the same as that, and no explanation is given. Of course, the construction method of the revetment is not limited to the method shown in the figure, even known cell-type revetment or double steel revetment is irrelevant.

In the present invention, the finishing material for index water (in the figure, steels may be formed but may be composed of other plates) at a predetermined interval from the disposal area in the direction of the landfill disposal site (2) from Quezon Lake (1) Driven in two rows to form a segment 9 on the double wall. In this segment 9, a plurality of steels are doubled and connected to the impermeable layer 4 while connecting the mutual coefficients to form two rows of steel walls 3a and 3b. The same type of soil is filled and the upper level of the soil is enough to store enough water inside. In addition, the segment 9 is always filled with water, and is configured to maintain the water level higher than that of the landfill site 2. As a result, the water in the segment 9 flows out through the steel walls 3a and 3b to the landfill site 2 or the external sea 6 through the earth and sand, the foundation ground, and the permeable layer as shown by the arrow. As a result, the segment 9 has a blocking function for preventing leakage of the leachate of the landfill.

In order to keep the water level in the segment 9 higher than the level in the landfill 2, both levels are monitored. When both levels approach, water may be supplied in the segment, but preferably, for example, When the water level in the section 9 and both levels of the landfill are less than the preset level difference, water can be automatically supplied until the appropriate amount of water is automatically replenished in the segment or the level difference is at the upper limit. Adoption of the system is necessary.

Fig. 2 shows a specific example of the automatic water supply means in the segment. 10a and 10b are the level meters 11 for detecting the water level in the segment and the water level in the landfill 2, respectively, and the control for outputting a predetermined signal because the detected value from the level meter is input and compared with the set value. The pump provided in the piping 13 which connects the seawater and the segment 9 in the seawater, and 14 is a driving part of this pump. In this control system, when the difference between the two levels is less than or equal to a predetermined value, a signal is sent from the controller 11 to the drive unit 14 of the pump 12 to start the pump so that seawater is broken through the pipe 13. The part 9 is supplied. Similarly, the water supply can be stopped when the level difference returns to the set value, or when the water supply by the timer or the fixed water supply by the flow valve are finished. Of course, other well-known systems may be employed for the water supply control system as well as those shown in the drawings. It is good to use seawater in the vicinity as the water to supply in the segment, but it is good to install harmless fresh water such as discharged water of the water treatment facility by installing piping.

If the interval of the segment 9 formed in the present invention is too narrow, it is difficult to maintain the water pressure so as to effluent water at the same time as the embedding work, while increasing the difficulty in construction, such as steel driving work, and this gap is too small. If it becomes wider, the level rise at the time of replenishing water will be solved, and the level of difficulty will be increased. Therefore, it should be decided at appropriate intervals in consideration of the size of the landfill, the size of the steel and the width of the embedding.

As described above, according to the degree equipment of the present invention, the following advantages are expected.

1) The current order method allows for leaching below a certain value, but according to the present invention, the leaching liquid hardly flows out into the open sea.

2) Even if there is a rainfall beyond the capacity of the water treatment plant or an unforeseen situation such as a breakdown of this treatment plant, the level of the landfill treatment plant becomes higher than the sea, the harmful leachate will not be able to flow into the sea.

3) The order can be assured only by managing the water level in the segment.

4) The planned rainfall can be reduced to reduce the size of the water treatment plant.

5) Even if the water treatment facility is demolished after the completion of the landfill, if the facility is left, the leachate can be prevented from leaking into the open sea.

6) Simple structure, no breakdown, and high reliability.

Claims (2)

In the landfill facility for sea level landfill, which constructs a revetment along the boundary of the planned landfill site and dumps waste in the planned landfill disposal site, which is blocked from the sea, the section of the double wall is made of steel, etc. And a water supply means in the concave convex part, and at the same time maintaining the water level in the segment at a higher level than that in the landfill disposal site. The water supply means according to claim 1, wherein the water supply means supplies at least two level meters for measuring the water level in the landfill and the water level in the segment, and the water supply to the water segment at a predetermined value when the difference is a preset value. A degree facility for sponge landfill, characterized in that it has a control unit that issues a command.