CN114809110A - Laying structure and laying method of rain and sewage diversion covering material in fly ash landfill reservoir area - Google Patents
Laying structure and laying method of rain and sewage diversion covering material in fly ash landfill reservoir area Download PDFInfo
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- CN114809110A CN114809110A CN202210740811.XA CN202210740811A CN114809110A CN 114809110 A CN114809110 A CN 114809110A CN 202210740811 A CN202210740811 A CN 202210740811A CN 114809110 A CN114809110 A CN 114809110A
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- fly ash
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- 239000000463 material Substances 0.000 title claims abstract description 184
- 239000010881 fly ash Substances 0.000 title claims abstract description 120
- 239000010865 sewage Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005192 partition Methods 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000009826 distribution Methods 0.000 claims abstract description 17
- 239000004927 clay Substances 0.000 claims description 15
- -1 polyethylene Polymers 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000002386 leaching Methods 0.000 abstract description 8
- 238000007599 discharging Methods 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000004576 sand Substances 0.000 description 7
- 238000004873 anchoring Methods 0.000 description 6
- 239000010813 municipal solid waste Substances 0.000 description 5
- 239000002920 hazardous waste Substances 0.000 description 4
- 230000003712 anti-aging effect Effects 0.000 description 3
- 239000004746 geotextile Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/006—Sealing of existing landfills, e.g. using mining techniques
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
- E02D2300/0009—PE
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
Abstract
The invention discloses a laying structure of a rain and sewage diversion covering material in a fly ash landfill reservoir area, wherein the fly ash landfill reservoir area comprises a reservoir area side slope and a reservoir area reservoir bottom; the fly ash is stacked at a preset position at the bottom of the reservoir area, and a water collecting and discharging channel is formed between the fly ash and an adjacent reservoir area slope; paving bottom covering materials at the rest positions of the reservoir side slope and the reservoir bottom of the reservoir; partition materials are arranged around the fly ash and connected with the bottom covering material; the top of the fly ash is covered with a day covering material, and the day covering material is connected with a partition material or a bottom covering material. The invention also discloses a method for paving the cover material for the distribution of rain and sewage in the fly ash landfill reservoir area. The invention can efficiently isolate the external rainwater from entering, ensures zero generation of the leaching solution, controls the generation of pollutants from the source and saves the post-treatment cost.
Description
Technical Field
The invention relates to the field of municipal solid waste incineration fly ash landfill disposal, in particular to a laying structure and a laying method of a rain and sewage diversion covering material in a fly ash landfill reservoir area.
Background
The national hazardous waste record (2021 edition) confirms that the incineration fly ash of the domestic garbage belongs to hazardous waste, and the category is incineration disposal residue of HW 18. The fly ash meets the requirements of the pollution control standard (GB 16889) of a domestic garbage landfill site, the fly ash can enter the domestic garbage landfill site for landfill, the landfill disposal process is not managed according to hazardous waste, and although the landfill disposal can be exempted, the nature of the hazardous waste of the fly ash is not changed due to the exemption. Although the yield and concentration of the fly ash leaching solution are greatly less than those of a domestic garbage landfill, the Cl < - > concentration of the fly ash leaching solution is high, and the pressure on post-stage leaching solution treatment equipment is high; therefore, daily coverage must be done in the landfill operation process, the control working face is as small as possible, coverage measures are timely done, and the generation of leaching solution is minimized as much as possible.
The traditional daily covering measure is to cover a film above the stack after the fly ash is buried, the fixing mode of the covering film is temporary ballasting, although the buried subareas can reduce the entering of partial rainwater, the covering measure can not isolate rainwater in the non-buried operation area outside the stack from entering the fly ash stack.
Disclosure of Invention
The invention aims to provide a laying structure and a laying method of a rain and sewage diversion covering material in a fly ash landfill storage area, which can efficiently isolate the entering of outside rainwater, ensure the zero generation of a leaching solution, control the generation of pollutants from the source and save the post-treatment cost.
In order to solve the technical problems, the invention provides a laying structure of a cover material for distribution of rain and sewage in a fly ash landfill reservoir area, wherein the fly ash landfill reservoir area comprises a reservoir area side slope and a reservoir area reservoir bottom;
the fly ash is stacked at a preset position at the bottom of the reservoir area, and a water collecting and discharging channel is formed between the fly ash and an adjacent reservoir area slope; paving bottom covering materials at the rest positions of the reservoir side slope and the reservoir bottom of the reservoir;
partition materials are arranged around the fly ash and connected with the bottom covering material;
the top of the fly ash is covered with a day covering material, and the day covering material is connected with a partition material.
Preferably, the partition material comprises a first partition material and a second partition material;
the first partition material is laid between the bottom of the reservoir and the fly ash; one side of the first partition material extends to the fly ash, and the other side of the first partition material extends to the bottom covering material on the bottom of the reservoir area;
the second partition material is laid between the fly ash and the reservoir slope; one side of the second partition material covers the water collecting and draining channel and then extends to the bottom covering material on the bank slope, and the other side of the second partition material extends to the fly ash.
Preferably, the day cover material completely covers the fly ash, and the day cover material completely covers or does not completely cover the first partition material and the second partition material.
Preferably, the first partition material, the second partition material and the day covering material are all fixed by adopting temporary ballast.
Preferably, the covering material and the partition material are polyethylene geomembranes, and the covering material covers the whole landfill area and is anchored in the first-stage anchoring platform.
Preferably, the first partition material and the second partition material are seamlessly connected with the bottom covering material by adopting a monorail welding mode.
Preferably, the water collecting and draining channels are filled and compacted by clay to form clay layers.
Preferably, the width of the collection and drainage channel is not less than 60 cm.
Preferably, the area of the daily cover material is greater than the bottom area of the fly ash.
The invention also provides a laying method of the laying structure of the rain and sewage diversion covering material in the fly ash landfill reservoir area, which is characterized by comprising the following steps of:
paving covering materials in the side slope of the reservoir area and the reservoir bottom of the reservoir area, cutting the covering materials paved in the reservoir bottom of the reservoir area according to a preset position, and taking the cut part of the covering materials as daily covering materials; cutting the rest part of the covering material to be used as a bottom covering material;
burying fly ash to a preset position, and forming a water collecting and draining channel between the fly ash and an adjacent reservoir slope;
paving partition materials around the fly ash, wherein the partition materials cover the over-collection drainage channel;
covering the fly ash with the day cover material.
Compared with the prior art, the invention has the beneficial effects that:
the invention can efficiently isolate the entering of external rainwater, ensure zero generation of the leaching solution, control the generation of pollutants from the source, save the post-treatment cost, and meanwhile, the invention has high flexibility and convenient operation.
The invention adopts the mode of pre-laying the covering material and the partition material to carry out daily covering, the partition material and the covering material at the bottom of the reservoir and the side slope of the reservoir can also adopt a welding mode to completely isolate rainwater from entering the fly ash pile body, and the fly ash pile body is arranged above the fly ash pile body in a water-following lap joint mode to guide and discharge the rainwater to the water collecting and discharging channel, thereby ensuring zero generation of drenching solution and effectively realizing distribution of rainwater and sewage.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a laying structure of a cover material for distribution of rain and sewage in a fly ash landfill area according to the present invention;
FIG. 2 is a schematic flow chart of the method for laying the cover material of the distribution of rain and sewage in the fly ash landfill area.
In the figure: a fly ash landfill area 1; a covering material 2; fly ash 3; a day cover material 4; a partition material 5; temporary ballast 6; reservoir area side slopes 7; a slope connecting part 8; a reservoir bottom connection site 9; a collection and drainage passage 10; a clay layer 11; a first stage anchoring platform 12; a bottom cover material 13; the reservoir area is a reservoir bottom 14.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather construed as limited to the embodiments set forth herein.
The terminology used in the description of the one or more embodiments is for the purpose of describing the particular embodiments only and is not intended to be limiting of the description of the one or more embodiments. As used in one or more embodiments of the present specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used in one or more embodiments of the present specification refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It will be understood that, although the terms first, second, etc. may be used herein in one or more embodiments to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first can also be referred to as a second and, similarly, a second can also be referred to as a first without departing from the scope of one or more embodiments of the present description. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The invention discloses a laying structure of a cover material for a rain and sewage shunt in a fly ash landfill reservoir area, wherein the fly ash landfill reservoir area 1 comprises a reservoir area side slope 7 and a reservoir area reservoir bottom 14;
the fly ash 3 is piled at a preset position of the reservoir bottom 14 of the reservoir area, and a water collecting and draining channel 10 is formed between the fly ash 3 and the adjacent reservoir area side slope 7; laying a bottom covering material 13 at the rest positions of the reservoir slope 7 and the reservoir bottom 14 of the reservoir area;
partition materials 5 are arranged around the fly ash 3, the partition materials 5 are connected with the bottom covering material 13, and the partition materials 5 cover the over-collection drainage channel 10;
the top of the fly ash 3 is covered with a day covering material 4, and the day covering material 4 is connected with a partition material 5.
The invention also discloses a laying method of the cover material for the distribution of rain and sewage in the fly ash landfill storage area, as shown in figure 1, the method is used for treating fly ash and comprises the following steps:
the covering material laying method specifically comprises the following steps:
1.1) pre-paving a layer of covering material 2 in the whole fly ash landfill area 1;
the fly ash landfill reservoir area 1 comprises a reservoir area reservoir bottom 14 and a reservoir area side slope 7 which are all completely covered with the covering material 2.
1.2), before the fly ash 3 is buried in the fly ash burying reservoir area 1, according to the position of the reservoir area reservoir bottom 14 area of the fly ash 3, cutting the corresponding covering material 2, wherein the cut part of the covering material 2 is used as the day covering material 4, and the cut rest part of the covering material 2 is used as the bottom covering material 13.
The area of the daily covering material 4 is larger than the bottom area of the fly ash 3 (the position of the reservoir bottom 14 area of the reservoir area where the fly ash 3 needs to be buried), so that the daily covering material 4 is ensured to be slightly larger than the bottom area of the fly ash 3, and complete covering can be realized.
Secondly, the fly ash 3 is buried into the corresponding reservoir bottom 14 area position of the fly ash burying reservoir area 1, the fly ash 3 begins to rise from a certain distance of the inner side of the reservoir side slope 7 (namely the fly ash 3 and the reservoir side slope 7 are separated by a certain distance), so that an effective water collecting and discharging channel 10 is formed, and the water collecting and discharging channel 10 can be convenient for collecting and guiding and discharging rainwater at the side slope.
The fly ash 3 is stabilized fly ash which is sealed and packaged, and is buried in a ton bag stacking mode to form a pile body, the gradient of the pile body is not more than 1:3, and gaps among the ton bags are filled and compacted by clay;
the stabilized fly ash which is sealed and packaged is the fly ash which is not in bulk and has the leaching standard meeting the requirements of landfill sites, the stability is strong, the sealing performance is good, and the stability of the fly ash 3 is ensured on the basis of ensuring that the fly ash 3 does not influence the surrounding environment.
The fly ash 3 is buried from the position close to the reservoir slope 7, and the position of the other side is determined according to daily burying workload as long as the final buried fly ash can ensure the self stability.
Thirdly, paving partition materials 5 around the fly ash 3, wherein the fly ash 3 is respectively connected with the covering materials 2 of the reservoir bottom 14 of the reservoir area and the reservoir side slope 7 of the reservoir area through the partition materials 5, and the partition materials 5 comprise first partition materials 51 and second partition materials 52; the method specifically comprises the following steps:
3.1) paving a layer of first partition material 51 between the bottom 14 of the reservoir area and the fly ash 3, wherein one side of the first partition material 51 extends to the ton bag fly ash at the first step position of the edge of the fly ash 3, and the side is fixed by adopting a temporary ballast 6; the other side of the first partition material 51 extends to the reservoir bottom 14 of the reservoir area to be connected with the pre-paved bottom covering material 13, and the connection position is used as a reservoir bottom connection position 9;
the fly ash 3 adopts a ton bag stacking mode, so that each layer of ton bag fly ash can form a step, and the height of each layer of ton bag fly ash is about 1 m; meanwhile, because the area of the reservoir bottom 14 of the reservoir area is large, even under the condition of raining, the depth of rainwater accumulated at the reservoir bottom 14 of the reservoir area cannot exceed 1m, namely the height of the reservoir bottom for resisting water is required to be not more than 1 m; according to the height of each layer of ton bag fly ash and the height of water resistance required at the bottom of the warehouse, the requirement of water resistance can be met by extending one side of the first partition material 51 to the ton bag fly ash at the first step position, and thus the material usage amount of the first partition material 51 cannot be wasted.
3.2) paving a layer of second partition material 52 between the fly ash 3 and the reservoir area side slope 7, wherein one side of the second partition material 52 extends to the reservoir area side slope 7 to be connected with the pre-paved bottom covering material 13, and the connection part is used as a side slope connection part 8; the other side of the second partition material 52 is laid on the top of the fly ash 3 and is fixed by adopting the temporary ballast 6;
because the rainwater collection amount at the position of the reservoir side slope 7 is large and the area of the reservoir side slope is much smaller than that of the reservoir bottom 14 of the reservoir region, the rainwater depth of the water collection and drainage channel 10 is deeper (more than 1 meter and can reach 2m and 3 m), namely the height of the side slope needing water insulation is higher; thus, the other side of the second partition material 52 is laid directly on top of the fly ash 3, thereby ensuring that rain water does not enter the fly ash 3.
Fourthly, paving the daily covering material 4 above the buried fly ash 3; the day covering material 4 is used for rain and sewage diversion covering;
the side of the day cover material 4 which extends to the complete bottom cover material 13 is fixed by pressing the day cover material 4, the first partition material 51 and the bottom cover material 13 which are arranged in this order from top to bottom with the temporary ballast 6;
the other side of the day covering material 4 extends above the second partition material 52 at the water collecting and draining passage 10, and the side is pressed on the day covering material 4 and the second partition material 52 which are arranged in sequence from top to bottom by adopting the temporary ballast 6 so as to be fixed;
the area of the daily covering material 4 is larger than the surface area of the fly ash 3, and the fly ash 3 needs to be completely covered;
one side of the daily covering material 4 is paved and extended to the outer side of the reservoir bottom connecting part 9, and the other side is paved into a water collecting and draining channel 10; the day covering material 4 of the present invention completely covers the second partition material 52 and the water collecting and draining passage 10, and the distance between the second partition material and the water collecting and draining passage 10 beyond the bottom of the reservoir is not less than 30 cm.
In this embodiment, the temporary ballast 6 of the present invention is a sand bag, the sand bag is an anti-aging geotextile bag made of polypropylene, the size of the sand bag is 65cm × 40cm × 30cm, sand is filled in the anti-aging geotextile bag, and the sand filling amount is not less than 1/2 of the anti-aging geotextile bag.
The spacing distance between the sand bags is not more than 1 m. The partition material 5 and the day cover material 4 are prevented from being lifted under the condition of strong wind, and the protective film can play a good role in protecting finished products such as welding seams and the like.
In this embodiment, the covering material 2 and the partition material 5 of the present invention are polyethylene geomembranes, the width is not less than 7m, the thickness is not less than 1.0mm, a plurality of covering materials 2 cover the whole fly ash landfill area 1 and are anchored in the first-stage anchoring platform 12, and the adjacent covering materials 2 are connected by welding.
Excavating a ditch with the size of 800mm multiplied by 800mm around a fly ash landfill area 1 to serve as a first-stage anchoring platform 12, wherein the first-stage anchoring platform 12 is used for fixing a covering material 2, and clay or sand or concrete blocks (generally, clay is preferably backfilled) are backfilled in the ditch of the first-stage anchoring platform 12; if the clay or sandy soil is backfilled, the compaction degree in the ditch is more than or equal to 93 percent.
The polyethylene geomembrane is preferably a linear density polyethylene (LLDPE) geomembrane having a width of 8m and a thickness of 1.0 mm. The linear density polyethylene (LLDPE) geomembrane has the permeability coefficient of less than or equal to 1.0 multiplied by 10 < -13 > cm/s and the elongation at break of more than or equal to 800 percent, has the excellent characteristics of corrosion resistance, puncture resistance, environmental stress cracking resistance and the like, and can effectively resist uneven settlement.
The polyethylene geomembrane can also adopt a high-density polyethylene geomembrane, and the linear density polyethylene geomembrane has better film extensibility than the high-density polyethylene geomembrane and better flexibility.
In this embodiment, the partition material 5 and the covering material 2 of the present invention are seamlessly connected by a single-rail welding method, that is, the side slope connection portion 8 and the bottom of reservoir connection portion 9 are seamlessly connected by a single-rail welding method, and the overlapping width is not less than 5.5 cm. The welded partition material 5 and the covering material 2 form an integral barrier, so that the fly ash 3 is completely isolated from the external environment, rainwater in a reservoir area does not enter the fly ash 3, the daily covering material 4 is adopted above the partition material 5 for omnibearing covering, and rainwater and sewage distribution is effectively realized.
In this embodiment, the drainage channels 10 are filled and compacted with clay to form clay layers 11. The specific shape of the clay layer 11 has no mandatory requirement, the stability of the stack of the fly ash 3 can be ensured after the clay is filled, the fly ash 3 is not suspended, the clay layer 11 needs to be compacted, the degree of compaction is more than or equal to 90 percent, and the upper surface of the clay layer 11 needs to be smooth.
In the present embodiment, the width of the water collecting and draining passage 10 of the present invention is not less than 60 cm. An effective water collecting and draining channel 10 is formed, so that rainwater can be quickly and smoothly guided and drained out of the field.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. Fly ash landfill reservoir area distribution of rain and sewage covering material's laying structure, fly ash landfill reservoir area (1) is including reservoir area side slope (7) and reservoir area bottom of the reservior (14), its characterized in that:
the fly ash (3) is stacked at a preset position of the reservoir bottom (14) of the reservoir area, and a water collecting and draining channel (10) is formed between the fly ash (3) and the adjacent reservoir area slope (7); laying a bottom covering material (13) at the rest positions of the reservoir slope (7) and the reservoir bottom (14) of the reservoir area;
partition materials (5) are arranged around the fly ash (3), the partition materials (5) are connected with the bottom covering material (13), and the partition materials (5) cover the over-collection drainage channel (10);
the top of the fly ash (3) is covered with a day covering material (4), and the day covering material (4) is connected with a partition material (5).
2. The laying structure of the cover material for distribution of rainwater and sewage in a fly ash landfill site according to claim 1, characterized in that:
the partition material (5) comprises a first partition material (51) and a second partition material (52);
the first partition material (51) is paved between the reservoir bottom (14) of the reservoir area and the fly ash (3); one side of the first partition material (51) extends to the fly ash (3), and the other side of the first partition material (51) extends to the bottom covering material (13) on the reservoir bottom (14) of the reservoir area;
the second partition material (52) is paved between the fly ash (3) and the reservoir slope (7); one side of the second partition material (52) covers the water collecting and draining channel (10) and then extends to the bottom covering material (13) on the reservoir slope (7), and the other side of the second partition material (52) extends to the fly ash (3).
3. The laying structure of the cover material for distribution of rainwater and sewage in a fly ash landfill site according to claim 2, characterized in that:
the fly ash (3) is completely covered by the day covering material (4), and the first partition material (51) and the second partition material (52) are completely covered or incompletely covered by the day covering material (4).
4. The laying structure of the cover material for distribution of rainwater and sewage in a fly ash landfill site according to claim 3, characterized in that:
the first partition material (51), the second partition material (52) and the day covering material (4) are fixed by adopting temporary ballast (6).
5. The laying structure of the cover material for distribution of rainwater and sewage in a fly ash landfill site according to claim 1, characterized in that:
the bottom covering material (13), the day covering material (4) and the partition material (5) are all polyethylene geomembranes.
6. The laying structure of the cover material for distribution of rainwater and sewage in fly ash landfill site according to claim 4, characterized in that:
the first partition material (51) and the second partition material (52) are seamlessly connected with the bottom covering material (13) in a monorail welding mode.
7. The laying structure of the cover material for distribution of rainwater and sewage in a fly ash landfill site according to claim 2, characterized in that:
the water collecting and draining channel (10) is filled and compacted by clay to form a clay layer (11).
8. The laying structure of the cover material for distribution of rainwater and sewage in a fly ash landfill site according to claim 1, characterized in that:
the width of the water collecting and draining channel (10) is not less than 60 cm.
9. The laying structure of the cover material for distribution of rainwater and sewage in a fly ash landfill site according to claim 1, characterized in that:
the area of the daily covering material (4) is larger than the bottom area of the fly ash (3).
10. A method for laying a laying structure of a cover material for a distribution of rainwater and sewage in a fly ash landfill site as claimed in any one of claims 1 to 9, comprising the steps of:
paving covering materials (2) in the reservoir slope (7) and the reservoir bottom (14) of the reservoir area, cutting the covering materials (2) paved in the reservoir bottom (14) of the reservoir area according to a preset position, and taking the cut parts of the covering materials (2) as daily covering materials (4); the remaining part of the covering material (2) is cut out to be used as a bottom covering material (13);
burying fly ash (3) to a preset position, and forming a water collecting and draining channel (10) between the fly ash (3) and an adjacent reservoir slope (7);
paving partition materials (5) around the fly ash (3), wherein the partition materials (5) cover the over-collection drainage channel (10);
covering the fly ash (3) with the day covering material (4).
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| CN202210740811.XA CN114809110A (en) | 2022-06-28 | 2022-06-28 | Laying structure and laying method of rain and sewage diversion covering material in fly ash landfill reservoir area |
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| CN202210740811.XA CN114809110A (en) | 2022-06-28 | 2022-06-28 | Laying structure and laying method of rain and sewage diversion covering material in fly ash landfill reservoir area |
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| CN114108705A (en) * | 2020-08-31 | 2022-03-01 | 中国瑞林工程技术股份有限公司 | Hazardous waste landfill system and method |
| CN114260282A (en) * | 2021-12-03 | 2022-04-01 | 灌南新苏国丰新能源有限公司 | Fly ash landfill method for waste incineration power plant |
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2022
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Application publication date: 20220729 |