JP5448141B2 - Landfill auxiliary equipment at waste disposal site - Google Patents

Description

  The present invention is a waste disposal site comprising a concave waste landfill area formed on the ground and opening upward, and a water shielding sheet laid on the slope of the edge of the landfill area. The present invention relates to a landfill auxiliary device.

  Conventionally, the above-mentioned waste disposal site is disclosed in Patent Document 1 below. According to this publication, the waste disposal site is formed on the ground and has a concave waste landfill area that opens upward, and the slope and center side of the edge of the landfill area. A water-impervious sheet laid over the entire bottom surface, and a fixture for fixing the outer edge of the water-impervious sheet to the outer edge of the landfill area.

And waste is thrown in one after another in the recess formed with the said water-impervious sheet, and the said waste is finally disposed by the landfill of the said landfill area.
Japanese Patent No. 3033402

By the way, the said water-impervious sheet is normally made of resin, and its thermal expansion coefficient is about 2.0 × 10 ⁻⁴ / ° C. That is, as the temperature rises by 50 ° C., a large slack of about 1% occurs.

  For this reason, for example, in the construction of a waste disposal site, the water shielding sheet is laid in the landfill area in the winter, and then, when the summer is reached, the water shielding sheet is accompanied by a temperature increase due to the seasonal change. Tends to cause large slack.

  Here, the slope of the edge of the landfill area is a slope of the slope that forms the outer edge of the landfill area, and a slope of slope that extends obliquely downward from the slope shoulder toward the bottom surface of the landfill area. And a surface portion. For this reason, when the above-mentioned slack occurs in the water-impervious sheet laid on the slope, the slack in the lower part of the water-impervious sheet located on the lower side of the sloped surface part due to the weight of each part of the water-impervious sheet Tends to occur intensively.

  Then, as described above, when waste is thrown into the recess formed by the water-impervious sheet with the slack in the lower part of the water-impervious sheet laid on the slope, the load from the waste is reduced. Given to the slack. Then, due to the load applied to the slack, the upper portion of the water shielding sheet located on the upper side of the slope is pulled downward, and a large tensile stress tends to be generated in the upper portion. As a result, there is a risk that this water-impervious sheet may be damaged at an early stage in terms of life.

  The present invention has been made by paying attention to the above-described circumstances, and an object of the present invention is to form a concave waste landfill area formed on the ground and opening upward, and an edge of the landfill area. In a waste disposal site equipped with a water shielding sheet laid on the slope of the section, it is prevented that the water shielding sheet is damaged early due to the slack due to thermal expansion of the water shielding sheet. Thus, the improvement of the life of the water shielding sheet is achieved.

  Another object of the present invention is to make it easier to construct a landfill auxiliary device in a waste disposal site.

The invention of claim 1 is a concave landfill area 4 for waste 2 formed on the ground 3 and opening upward, and a water shielding sheet 7 laid on the slope 5 of the edge of the landfill area 4. The slope 5 is located at the outer edge of the landfill area 4 and extends substantially horizontally, and the slope 5a extends from the slope shoulder 5a toward the bottom surface 6 of the landfill area 4. In a waste disposal site having a sloped surface portion 5b extending obliquely downward,
Compressed air 24 is sent into a space 27 between the slope inclined surface portion 5b and the water shielding sheet 7 facing the slope inclined surface portion 5b so that the water shielding sheet 7 can bulge outward. A device 25 is provided, and the water shielding layer 24 is compressed by compressed air 24 fed into the space 27 by the blower 25 so as to remove slack generated in the lower portion of the water shielding sheet 7 located on the lower side of the slope 5. It is a landfill auxiliary | assistance apparatus in the waste disposal site characterized by making the sheet | seat 7 bulge.

The invention of claim 2 is a waste disposal site provided with a drain pipe 16 for draining the water in the ground 3 to the outside of the waste disposal site 1.
2. The landfill auxiliary device in a waste disposal site according to claim 1, wherein the compressed air 24 is sent into the space 27 through the drain pipe 16.

The invention of claim 3 is a concave landfill area 4 for waste 2 formed on the ground 3 and opening upward, and a water shielding sheet 7 laid on the slope 5 of the edge of the landfill area 4. The slope 5 is located at the outer edge of the landfill area 4 and extends substantially horizontally, and the slope 5a extends from the slope shoulder 5a toward the bottom surface 6 of the landfill area 4. In a waste disposal site having a sloped surface portion 5b extending obliquely downward,
The water shield sheet 7 facing to the slopes inclined surface portion 5b is on, is a bag shape with a lower sheet 11, they on the space 14 between the lower sheets 11 and 12 feed the compressed air 24 Nde write, the blowing device 25 to allow bulging of the water-impervious sheet 7 outwardly provided, so as to remove the slack 7b occurring in the lower portion of the water shield sheet 7 located on the lower side of the slopes 5, by the blower 25 is landfill aid in waste disposal sites you characterized in that so as to bulge the water shield sheet 7 by the compressed air 24 fed into the space 14.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 comprises a concave waste landfill area formed on the ground and opening upward, and a water shielding sheet laid on the slope of the edge of the landfill area, A surface is located at the outer edge of the landfill area and includes a sloped shoulder extending substantially horizontally and a sloped sloped part extending obliquely downward from the sloped shoulder toward the bottom of the landfill area. At the waste disposal site,
A blower device is provided to send compressed air to a space between the sloped surface part and the water-impervious sheet facing the sloped surface part, and to allow the water-impervious sheet to bulge outwardly. The water shielding sheet is bulged by the compressed air sent into the space by the blower so as to remove the slack generated in the lower part of the water shielding sheet located on the lower side of the surface.

  Here, when the water-impervious sheet laid on the slope face is thermally expanded and slack occurs, the slack is formed in the lower part of the water-impervious sheet located on the lower side of the slope face due to its own weight. Tends to occur intensively.

Therefore, when slack is generated in the water-impervious sheet as described above, when throwing waste into the landfill area, the blower device causes the sloped surface part to face the sloped surface part. Compressed air is sent into the space between the water sheet and the water shielding sheet bulges outward to remove the slack.

  And if the waste is thrown into the landfill area in the state where the slack is removed as described above, the waste thrown in will apply a load to the slack and the upper part of the water shielding sheet located on the upper side of the slope Is prevented from pulling downward and creating a large tensile stress in the upper part. Therefore, the water-impervious sheet is prevented from being damaged early, and the life of the water-impervious sheet is improved.

The invention of claim 2 is a waste disposal site provided with a drain pipe for draining the water in the ground to the outside of the waste disposal site.
The compressed air is sent into the space through the drain pipe.

For this reason, in order to send the compressed air into the space , the construction of the landfill auxiliary device can be simplified because the drainage pipe is used.

The invention of claim 3 includes a concave waste landfill area formed on the ground and opening upward, and a water shielding sheet laid on the slope of the edge of the landfill area, A surface is located at the outer edge of the landfill area and includes a sloped shoulder extending substantially horizontally and a sloped sloped part extending obliquely downward from the sloped shoulder toward the bottom of the landfill area. At the waste disposal site,
Said water barrier sheet facing the slopes inclined surface portion is above a bag shape with a lower layer sheet, on these, Nde write sends compressed air into the space between the lower layer sheet, the outer the water shield sheet The blower is provided with a blower that can be swelled, and compressed air sent into the space by the blower so as to remove slack generated in the lower part of the water shielding sheet located on the lower side of the slope. The water sheet is bulged .

Here, when the water-impervious sheet laid on the slope face is thermally expanded and slack occurs, the slack is formed in the lower part of the water-impervious sheet located on the lower side of the slope face due to its own weight. Tends to occur intensively.

Therefore, in the case where slack has occurred in the water shielding sheet as described above, when throwing waste into the landfill area, above the water shielding sheet facing the sloped surface portion by the blower, Compressed air is sent into the space between the lower layer sheets to bulge the waterproof sheet outward and remove the slack.

And if the waste is thrown into the landfill area in the state where the slack is removed as described above, the waste thrown in will apply a load to the slack and the upper part of the water shielding sheet located on the upper side of the slope Is prevented from pulling downward and creating a large tensile stress in the upper part. Therefore, the water-impervious sheet is prevented from being damaged early, and the life of the water-impervious sheet is improved.

Here, the space between the upper and lower sheets is hermetically sealed. For this reason, the compressed air for inflating the water shielding sheet to the outside can prevent unnecessary leakage to the outside of the space, and the amount of the compressed air can be brought close to the necessary minimum. Therefore, the capacity of the blower of the blower can be reduced accordingly, and the construction of the landfill auxiliary device can be further simplified .

  The present invention relates to a landfill auxiliary device in a waste disposal site, a concave landfill area formed on the ground and opening upward, and a water shielding sheet laid on the slope of the edge of the landfill area. In the waste disposal site equipped with the above, it is possible to prevent the impervious sheet from being damaged early due to the slack due to thermal expansion of the impervious sheet, and to improve the life of the impervious sheet. In order to achieve the object of achieving, the best mode for carrying out the present invention is as follows.

That is, the waste disposal site includes a concave waste landfill area formed on the ground and opening upward, and a water shielding sheet laid on the slope of the edge of the landfill area. Further, the slope is located at the outer edge of the landfill area and extends substantially horizontally, and a slope slope part extending obliquely downward from the slope shoulder toward the bottom of the landfill area. With. A blower device is provided to send compressed air to a space between the sloped surface part and the water-impervious sheet facing the sloped surface part, and to allow the water-impervious sheet to bulge outwardly. The water shielding sheet is bulged by the compressed air sent into the space by the blower so as to remove the slack generated in the lower part of the water shielding sheet located on the lower side of the surface.

  In order to describe the present invention in more detail, the first embodiment will be described with reference to FIGS.

  In FIGS. 1 and 2, reference numeral 1 denotes a waste disposal site for landfilling waste 2 for final disposal. The waste disposal site 1 is formed in the ground 3 and has a concave shaped landfill area 4 for waste 2 that opens upward, and a slope 5 and a central part that form the inner surface of the edge of the landfill area 4. A water-impervious sheet 7 laid continuously over the entire bottom surface 6 forming the inner surface on the side, and a fixture 8 for fixing the outer edge 7a of the water-impervious sheet 7 to the outer edge of the landfill area 4. ing.

  And the waste 2 is thrown in one after another in the recess 9 formed of the said water-impervious sheet 7, and the said waste 2 is made final disposal by performing a landfill.

  The slope 5 is located at the outer edge of the landfill area 4 and extends substantially horizontally, and the slope 5a extends obliquely downward from the slope shoulder 5a toward the bottom surface 6 of the landfill area 4. And a sloped surface portion 5b.

  The water-impervious sheet 7 includes a plurality of water-impervious units 13 that face each other in the vertical direction and have lower-layer sheets 11 and 12 that are formed into a bag shape. These water shielding units 13 are continuously laid along the inner surface (slope 5, bottom surface 6) of the landfill area 4. A space 14 inside each of the water shielding units 13 is a sealed space, and the two water shielding units 13 arranged side by side are tightly and tightly closed by heat welding or the like.

The upper and lower sheets 11 and 12 are made of thermoplastic high-density polyethylene (HDPE) or vinyl chloride (PVC), and other resins such as EPDM, TPO, TPU, FPA, and asphalt sheets. It is 1.5 mm or more and is usually about 3 mm. Further, the thermal expansion coefficient (× 10 ⁻⁴ / ° C.) of each of the above resins is generally as follows. HDPE = 1.9, PVC = 1.8, EPDM = 1.6, TPO = 2.1, TPU = 1.6, FPA = 1.0, and asphalt sheet = 1.4.

  Although not shown, generally, upper and lower protective sheets are provided so as to sandwich the upper and lower layer sheets 11 and 12 from above and below, and an intermediate protective sheet is interposed between the upper and lower layer sheets 11 and 12. Established. Each of the protective sheets is made of a polyester resin nonwoven fabric and has a thickness of approximately 10 mm.

  A concave groove 15 is formed in the slope shoulder 5a along the slope shoulder 5a. The outer edge portion 7a of the water shielding sheet 7 is fitted into the groove 15 along the inner surface of the groove 15, and the outer edge portion 7a of the water shielding sheet 7 has a U-shaped cross section. Then, concrete is placed inside the outer edge portion 7 a of the water shielding sheet 7, and this is used as the fixture 8.

  Moreover, although not shown in figure, while forming the outer edge part 7a of the said water-impervious sheet 7, the both-ends edge part of the lower layer sheets 11 and 12 is joined firmly so that the cross section may become a bag shape. Alternatively, a water shielding material called asphalt mastic is injected between the upper and lower edge portions of the lower and upper sheet 11 and 12 in a heat-melted state, and then solidified so that the both edge portions are firmly integrated with each other.

  A drainage pipe 16 that is buried in the ground 3 that forms the bottom surface 6 of the landfill area 4 and drains the water generated in the ground 3 to the outside of the waste disposal site 1 is provided. Further, another drain pipe 17 is provided for draining the water generated in the recess 9 of the water shielding sheet 7 to the outside of the waste disposal site 1. Further, a gas vent pipe 20 for exhausting the gas 19 generated from the waste 2 in the recess 9 of the water shielding sheet 7 to the outside of the waste disposal site 1 is provided.

  A large number of small holes are formed in each portion of the pipe wall of the drain pipe 16 and the gas vent pipe 20 embedded in the waste 2 to allow water and gas to pass therethrough. Further, in order to prevent clogging of these small holes, a water-permeable and air-permeable covering material 21 composed of sand, pebbles, etc. that covers the pipes 16 and 20 as a whole is provided.

  A landfill assisting device 23 is provided to assist the landfill when the waste 2 is put into the recess 9 of the water shielding sheet 7 to perform landfill. The landfill auxiliary device 23 includes a blower device 25 that sends compressed air 24 to the inside of the water-impervious sheet 7 so that the water-impervious sheet 7 can be bulged outward (dashed line in FIG. 1). Yes. The blower 25 includes a blower 26 and a blower pipe that sends the compressed air 24 discharged from the blower 26 into the space 27 between the water shielding sheet 7 and the slope 5 that is inside the water shielding sheet 7. 28 and a pressure regulating valve (relief valve) that adjusts the pressure of the compressed air 24 so that the pressure of the compressed air 24 in the space 27 is maintained below a predetermined pressure.

  The blower pipe 28 communicates with the first pipe 30 directly communicating with the space 27 from the discharge port of the blower 26, and with the drainage pipe 16 through the discharge port. 27 and a third pipe 32 communicating from the discharge port to the gas vent pipe 20.

  Valves 33 are attached to the first to third pipes 30 to 32, respectively. When at least one of these valves 33 is opened, the opened valve 33 and a pipe communicating therewith are passed, and the compressed air 24 is supplied to the space 27 and the gas vent pipe 20. Is sent selectively.

  If the compressed air 24 is sent into the space 27 inside the water-impervious sheet 7 by the blower 25, the water-impervious sheet 7 can be bulged outwardly as shown by a one-dot chain line in FIG. Yes.

  Here, when the water-impervious sheet 7 laid on the slope 5 is thermally expanded to cause a slack 7b, the weight of each part of the water-impervious sheet 7 is caused by the weight of each part of the water-impervious sheet 7 so as to be located on the lower side of the sloped surface 5b. The slack 7b tends to occur intensively at the lower part of the water sheet 7.

  Therefore, when the slack 7b occurs in the water-impervious sheet 7 as described above, when the waste 2 is thrown into the landfill area 4, the air blower 25 causes the space 27 inside the water-impervious sheet 7 to be inside. Compressed air 24 is fed into the water-impervious sheet 7 so as to bulge outwardly as shown by a one-dot chain line in FIG. 1 to remove the slack 7b.

  Then, if the waste 2 is thrown into the landfill area 4 with the slack 7b removed as described above (two-dot chain line in FIGS. 1 and 2), the thrown waste 2 puts a load L on the slack 7b. It is possible to prevent the upper portion of the water-impervious sheet 7 located on the upper side of the slope 5 from being pulled downward and causing a large tensile stress in the upper portion. Therefore, the water-impervious sheet 7 is prevented from being damaged early, and the life of the water-impervious sheet 7 is improved.

  Moreover, the fixture 8 which fixes the outer edge part 7a of the said water-impervious sheet 7 to the outer edge part (slope shoulder part 5a) of the said landfill area 4 by the part in which the tensile stress produced in the upper part of the said water-impervious sheet 7 is suppressed small. Can be made smaller and lighter, that is, the configuration of the waste disposal site 1 can be simplified.

  Here, the water shielding sheet 7 in the waste disposal site 1 has a very large area. For this reason, even if a penetration flaw has occurred in any part of the water shielding sheet 7, it is extremely difficult to find it through visual observation.

  However, as described above, when the compressed air 24 is sent into the space 27 in an attempt to remove the slack 7b by expanding the water-proof sheet 7 outward, there is a penetration damage to the water-proof sheet 7. If so, at least a portion of the compressed air 24 is discharged to the outside through the penetrating wound.

  For this reason, when the water-impervious sheet 7 is bulged as described above, first, since the desired bulged state cannot be obtained in the water-impervious sheet 7, it is detected that the penetrating flaw has occurred. Is done. Second, the occurrence position of the penetrating flaw is detected by the occurrence of smoke and dust scattering accompanying the discharge of the compressed air 24 and the generation of bubbles due to the use of soapy water. Therefore, at the time of the removal work of the slack 7b due to the swelling of the water-impervious sheet 7 as described above, it is possible to easily and reliably find the penetrating flaw and repair the blockage, and discard it to the landfill area 4 This is extremely useful for the landfill work of the object 2.

  In addition, what is necessary is just to stop the said air blower 25, when stopping the injection | throwing-in of the waste material 2 to the said landfill area 4 or canceling.

Further, as described above, in the waste disposal site provided with the drain pipe 16 for draining the water in the ground 3 to the outside of the waste disposal site 1,
The compressed air 24 is sent into the space 27 inside the water shielding sheet 7 through the drain pipe 16 and the covering material 21.

  For this reason, in order to send the compressed air 24 to the inside of the water-impervious sheet 7, the construction of the landfill auxiliary device 23 can be simplified because the drain pipe 16 is used.

  On the other hand, by introducing the waste 2 into the landfill area 4, the waste 2 containing water is stored in the recess 9 of the water shielding sheet 7. In this case, the waste 2 tends to generate anaerobic organisms and generate unnecessary gas. Therefore, by using the gas vent pipe 20 and the third pipe 32, the compressed air 24 can be sent into the waste 2 in the recess 9 of the water shielding sheet 7. And by sending in this compressed air 24, the oxygen concentration of the said waste 2 improves, aerobic organisms generate | occur | produce, and generation | occurrence | production of the above-mentioned useless gas is prevented.

  In addition, although the above is based on the example of illustration, the 1st pipe 30 extended from the said air blower 26 may be once embedded in the ground 3, and the extension end may be opened to the said space 27 from this ground 3 side. .

FIG. 3 below shows the second embodiment. This Example 2, Example 1 and configuration, are common in many respects in operation and effect. Therefore, regarding these common items, common reference numerals are attached to the drawings, and redundant description thereof is omitted, and different points are mainly described. In addition, the configuration of each part in these embodiments may be variously combined in light of the object and operational effects of the present invention.

  In order to describe the present invention in more detail, the second embodiment will be described with reference to FIG.

  In FIG. 3, the water-impervious sheet 7 is formed into a bag shape with the upper and lower sheet 11, 12, and the compressed air 24 is placed in the space 14 between the upper and lower sheet 11, 12 inside the water-impervious sheet 7. Is supposed to be sent.

  Here, the space 14 between the upper and lower sheet 11, 12 is sealed. For this reason, the compressed air 24 for expanding the water shielding sheet 7 outward is prevented from unnecessary leakage to the outside of the space 14, and the amount of the compressed air 24 is brought close to the necessary minimum. Can do. Therefore, the capacity | capacitance of the air blower 26 of the said air blower 25 can be made smaller by that much, and the structure of the landfill auxiliary | assistance apparatus 23 can be simplified further.

  In the above case, the air pipes 28 of the blower device 25 are individually connected to the spaces 14 of the respective water-impervious units 13 and the valves are used to selectively supply the compressed air 24 to these spaces 14. It may be possible to send in.

If it does in this way, the water shielding unit 13 of the desired site | part in the said water shielding sheet 7 can be selectively expanded. Therefore, the capacity | capacitance of the air blower 26 of the said air blower 25 can be made smaller further, and the structure of the landfill auxiliary | assistance apparatus 23 can be simplified further .

FIG. 3 shows the first embodiment and is a partially enlarged sectional view of FIG. 2. 1 is a side sectional view of a waste disposal site, showing Example 1. FIG. FIG. 2 shows a second embodiment and corresponds to FIG .

DESCRIPTION OF SYMBOLS 1 Waste disposal site 2 Waste 3 Ground 4 Landfill area 5 Slope 5a Slope shoulder 5b Slope slope 6 Sole 7 Water shielding sheet 7a Outer edge 7b Slack 8 Fixture 9 Recess 11 Upper sheet 12 Lower sheet 13 Water shielding unit 14 Space 16 Drainage pipe 17 Other drainage pipe 19 Gas 20 Degassing pipe 23 Landfill auxiliary device 24 Compressed air 25 Blower 26 Blower 27 Space 28 Blower pipe 36 Tube L Load

Claims (3)

A concave waste landfill area formed on the ground and opening upward, and a water shielding sheet laid on the slope of the edge of the landfill area, the slope of the landfill area In a waste disposal site that is located at the outer edge and includes a slope shoulder that extends substantially horizontally and a slope slope that extends obliquely downward from the slope shoulder toward the bottom of the landfill area,
A blower device is provided to send compressed air to a space between the sloped surface part and the water-impervious sheet facing the sloped surface part, and to allow the water-impervious sheet to bulge outwardly. A feature of the present invention is that the water shielding sheet is swelled by compressed air sent into the space by the blower so as to remove slack generated in the lower part of the water shielding sheet located on the lower side of the surface. Landfill auxiliary equipment at a waste disposal site. In a waste disposal site with a drain pipe that drains the water in the ground to the outside of the waste disposal site,
The landfill auxiliary device in a waste disposal site according to claim 1, wherein the compressed air is sent into the space through the drain pipe. A concave waste landfill area formed on the ground and opening upward, and a water shielding sheet laid on the slope of the edge of the landfill area, the slope of the landfill area In a waste disposal site that is located at the outer edge and includes a slope shoulder that extends substantially horizontally and a slope slope that extends obliquely downward from the slope shoulder toward the bottom of the landfill area,
Said water barrier sheet facing the slopes inclined surface portion is above a bag shape with a lower layer sheet, on these, Nde write sends compressed air into the space between the lower layer sheet, the outer the water shield sheet The blower is provided with a blower that can be swelled, and compressed air sent into the space by the blower so as to remove slack generated in the lower part of the water shielding sheet located on the lower side of the slope. landfill aid in waste disposal sites characterized in that the water sheet so as to bulge.

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