CN221297983U - Semi-closed type valley type dangerous waste flexible landfill - Google Patents
Semi-closed type valley type dangerous waste flexible landfill Download PDFInfo
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- CN221297983U CN221297983U CN202323036336.7U CN202323036336U CN221297983U CN 221297983 U CN221297983 U CN 221297983U CN 202323036336 U CN202323036336 U CN 202323036336U CN 221297983 U CN221297983 U CN 221297983U
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- 239000002920 hazardous waste Substances 0.000 claims abstract description 19
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a semi-closed type valley type hazardous waste flexible landfill, which is formed by enclosing a substrate, a side slope and a garbage dam into a semi-closed type valley type landfill, and further comprises a ceiling, a middle column, a side column, an anti-seepage system, a percolate collecting and guiding and draining system and a groundwater guiding and draining system; the ceiling is used for keeping off rain at the upper part of the landfill area; the middle column is positioned in the landfill field and used for supporting the ceiling; the side columns are positioned at the periphery of the landfill site to form an enclosure structure; the seepage prevention system is divided into a base seepage prevention system for base seepage prevention, a side slope seepage prevention system for side slope seepage prevention and a middle column seepage prevention system for middle column seepage prevention; the percolate collecting and guiding system is inserted into the substrate seepage prevention system and is used for collecting and guiding percolate; the underground water drainage system is positioned below the base seepage-proofing system and is used for guiding and draining underground water. The utility model can greatly reduce the generation of percolate and effectively solve the problems of high operation cost and environmental pollution of percolate treatment.
Description
Technical Field
The invention relates to the technical field of safe landfill disposal of dangerous wastes, in particular to a semi-closed valley type flexible landfill of dangerous wastes.
Background
The hazardous waste landfill is an important means and facility for safely disposing hazardous waste as a method for finally disposing hazardous waste, and has the main functions of isolating the transfer of harmful components such as heavy metals in the hazardous waste to the environment and human bodies and realizing the safe disposal of the hazardous waste. The flexible landfill is a main landfill disposal facility because of low cost, relatively mature technology and simple operation.
The generation of landfill leachate and the avoidance of environmental damage are important problems which must be considered in the design, construction and operation of the landfill, and are important problems to be solved by the seepage-proofing engineering scheme. The generation of percolate mainly comes from rainfall infiltration in a field region, and the water content of dangerous waste is the second water content. The property and the water quantity change are complex, and are mainly related to various factors such as hazardous waste components, landfill operation process, seasonal change, landfill age, covering material condition and the like.
Disclosure of Invention
The invention aims to provide a semi-closed type valley type hazardous waste flexible landfill for solving the problems.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The semi-closed type valley type dangerous waste flexible landfill comprises a substrate, a side slope and a waste dam, wherein the substrate, the side slope and the waste dam are enclosed to form a semi-closed type valley type landfill, and the landfill further comprises a ceiling, a middle column, a side column, an anti-seepage system, a percolate collecting and guiding and draining system and a groundwater guiding and draining system;
The roof is used for shielding rain at the upper part of a landfill site and comprises a grid and a roof, wherein the roof adopts a profiled steel sheet, and the grid is positioned below the steel sheet to support the steel sheet;
The middle column is positioned in the landfill field and used for supporting the ceiling;
the side columns are positioned at the periphery of the landfill site to form an enclosure structure;
The seepage prevention system is divided into a base seepage prevention system for base seepage prevention, a side slope seepage prevention system for side slope seepage prevention and a middle column seepage prevention system for middle column seepage prevention;
The percolate collecting and guiding and draining system is inserted in the substrate seepage prevention system and is used for collecting and guiding and draining percolate;
The underground water drainage system is positioned below the base seepage-proofing system and is used for guiding and draining underground water.
Further, the base seepage-proofing system comprises a first seepage-proofing layer, a second seepage-proofing layer, a first protection layer, a third seepage-proofing layer, a fourth seepage-proofing layer, a second protection layer and an isolation layer from bottom to top.
Further, the first impermeable layer consists of compacted clay with the thickness of 300mm and a geotextile clay liner with the thickness of 5000g/m 2 GCL, the second impermeable layer is a 2.0mm smooth HDPE geotextile, the first protective layer is 600g/m 2 polyester non-woven geotextile, the third impermeable layer consists of compacted clay with the thickness of 300mm and a geotextile clay liner with the thickness of 5000g/m 2 GCL, the fourth impermeable layer is a smooth HDPE geotextile with the thickness of 2.0mm, the second protective layer is 600g/m 2 polyester non-woven geotextile, and the isolation layer is 200g/m 2 PE woven geotextile.
Further, the side slope seepage prevention system comprises a protective layer, a secondary artificial lining layer, a secondary seepage detection layer, a master lining layer, a protective layer, a primary seepage detection layer and a laminated top layer from bottom to top.
Further, the protective layer is a 5000g/m 2 GCL geotechnical polymerization clay liner, the secondary artificial lining layer is a single-wool-surface HDPE geomembrane with the thickness of 2.0mm, the secondary leakage detection layer is a 6.3mm geotechnical composite three-dimensional drainage grid, the master artificial lining layer is a single-wool-surface HDPE geomembrane with the thickness of 2.0mm, the protective layer is 600g/m 2 polyester non-woven geotechnical cloth, the primary leakage detection layer is a 6.3mm geotechnical composite three-dimensional drainage grid, and the laminated layer is a woven bag with the thickness of 300 mm.
Further, the middle column seepage-proofing system comprises a column body, a first protective layer, a secondary artificial lining layer, a second protective layer, a master lining layer and a third protective layer from inside to outside.
Further, the protective layer 1 is 600g/m 2 of polyester non-woven geotextile, the secondary artificial lining is a single-wool-side HDPE geotextile with the thickness of 2.0mm, the protective layer 2 is 600g/m 2 of polyester non-woven geotextile, the primary artificial lining is a single-wool-side HDPE geotextile with the thickness of 2.0mm, and the protective layer 3 is 600g/m 2 of polyester non-woven geotextile.
Further, the percolate collecting and guiding and draining system comprises a primary percolate guiding and draining layer, a secondary percolate guiding and draining layer, a guiding and draining pipeline and a water collecting well, wherein the primary percolate guiding and draining layer is arranged between a second protecting layer and an isolating layer and is composed of pebbles with the thickness of 50cm and the particle size of 30-50 mm and HDPE perforated water collecting pipes, the secondary percolate guiding and draining layer is arranged between the first protecting layer and the third protecting layer, a 6.3mm composite geotechnical drainage net is adopted, and the primary percolate guiding and draining layer and the secondary percolate guiding and draining layer are sequentially connected with the guiding and draining pipeline and the water collecting well.
Further, the underground water drainage system sequentially comprises a reverse filtering layer, an underground water drainage layer and a protective layer from bottom to top, wherein the reverse filtering layer is 200g/m 2 PE woven geotextile, the underground water drainage layer is 500mm thick pebbles with the particle size of 30-50 mm, and the protective layer is 600g/m 2 polyester non-woven geotextile.
Compared with the prior art, the invention has the following beneficial effects:
(1) The flexible landfill roof is arranged, so that the amount of percolate is greatly reduced, serious influence on the environment is avoided, and the operation cost is reduced.
(2) By arranging the light collecting belt on the flexible landfill ceiling, the influence of ultraviolet rays on the material of the seepage prevention system is blocked, the service life of the material of the seepage prevention system is prolonged, and the leakage risk of the seepage prevention system is reduced.
(3) The flexible landfill site is constructed with a base seepage prevention system and a side slope seepage prevention system, and the base and the side slope of the site adopt a high-standard seepage prevention design scheme, so that shallow rainwater reserved in the underground of the site bottom and the soil of the side slope is effectively prevented from entering the site bottom percolate collection system and the pile body, and the percolate amount is reduced.
(4) The middle column with the seepage-proofing system is arranged in the flexible landfill, so that the structural safety of the large-span valley-shaped ceiling is guaranteed, and meanwhile, the seepage-proofing system meets the seepage-proofing requirement.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a landfill according to the present invention;
FIG. 2 is a schematic view of a middle column according to the present invention;
FIG. 3 is a schematic diagram of a base barrier system and a middle column barrier system of the present invention;
FIG. 4 is a schematic diagram of a center pillar permeation prevention system according to the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
Base 100, side slope 200, waste dam 300, ceiling 400, middle column 500, side column 600, anti-seepage system 700, percolate collection and drainage system 800, groundwater drainage system 900, base anti-seepage system 701, side slope anti-seepage system 702, middle column anti-seepage system 703.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the landfill comprises a base 100, a side slope 200 and a waste dam 300, wherein the base 100, the side slope 200 and the waste dam 300 are enclosed to form a semi-closed type valley type landfill field, and the landfill further comprises a ceiling 400, a middle column 500, a side column 600, an anti-seepage system 700, a percolate collecting and guiding system 800 and a groundwater guiding and draining system 900;
The ceiling 400 is used for shielding rain at the upper part of a landfill site and comprises a net rack and a roof, wherein the roof adopts profiled steel sheets, and the net rack is positioned below the steel sheets to support the steel sheets;
The intermediate column 500 is located within a landfill site, for supporting a roof,
The side columns 600 are positioned at the periphery of the landfill site to form an enclosure structure;
The seepage prevention system 700 is divided into a base seepage prevention system 701 for base seepage prevention, a side slope seepage prevention system 702 for side slope seepage prevention and a middle column seepage prevention system 703 for middle column seepage prevention;
The percolate collection and drainage system 800 is inserted in the base impermeable system 701 and is used for collecting and draining percolate;
The groundwater drainage system 900 is located below the substrate barrier system 701 for draining groundwater.
The roof 400 in this scheme comprises rack and roofing to the roofing adopts profiled steel sheet to set up the light extraction area, its main role is to shelter from the rainfall, prevents that the rainwater from directly getting into the landfill site, thereby reduces the volume of production of flexible landfill site filtration liquid by a wide margin, and this helps alleviateed filtration liquid treatment pressure, has reduced the risk that environment and groundwater received the pollution simultaneously. The middle column 500 in the scheme is used for supporting the large-span steel structure ceiling 400 and consists of a reinforced concrete column 501 and a steel lattice column 502, and the reinforced concrete column 501 with a hollow structure provides enough structural strength to ensure that the ceiling 400 is used for keeping off rain on the upper part of a landfill area. The side columns 600 in the scheme are positioned at the periphery of the field to form an integral enclosure structure, and are also composed of the reinforced concrete columns 501 and the steel lattice columns 502, and the side columns 600 have the functions of further enhancing the stability of a landfill area, simultaneously preventing hazardous waste at the boundary of the landfill area from leaking, playing a role in protecting the periphery of the landfill, and being beneficial to ensuring the safety of the landfill.
As an alternative embodiment, the roof is provided with a light collecting belt, which can block the influence of ultraviolet rays on the impermeable material and prolong the service life of the impermeable system.
As an alternative embodiment, the roof 400 is provided with a rain gutter to direct rain water out of the flood interception gutter discharge field. And flood intercepting ditches can be arranged along the edges of the field, so that off-site rain flood during rainfall is discharged into the rain water collecting pool through the flood intercepting ditches, and the field percolate quantity is reduced.
As an alternative embodiment, the intermediate posts 500 span about 50-60 m and are about 8-22 m in height. In view of economy and safety, a reinforced concrete column 501 and steel lattice column 502 are adopted.
As an alternative embodiment, the side column 600 is also comprised of reinforced concrete columns and steel lattice columns.
As an alternative example, the base barrier system 701 is composed of, from bottom to top, a barrier layer I (300 mm thick compacted clay+5000 g/m 2 GCL geopolymeric clay liner), a barrier layer II (2.0 mm thick smooth HDPE geomembrane), a protective layer I (polyester nonwoven geotextile (600 g/m 2), a barrier layer III (300 mm thick compacted clay+5000 g/m 2 GCL geopolymeric clay liner), a barrier layer IV (2.0 mm thick smooth HDPE geomembrane), a protective layer II (600 g/m 2 polyethylene nonwoven geotextile), an insulating layer (PE woven geotextile 200g/m 2), and a base compaction of not less than 93%.
As an alternative embodiment, the slope impervious system 702 is a protective layer (5000 g/m 2 GCL geotechnical polymeric clay liner), a secondary artificial lining (2.0 mm thick single-wool HDPE geomembrane), a secondary leak detection layer (6.3 mm geocomposite three-dimensional drainage grid), a master lining (2.0 mm thick single-wool HDPE geomembrane), protective layer 1 (600 g/m 2 polyester nonwoven geotextile), a primary leak detection layer (6.3 mm geocomposite three-dimensional drainage grid), a laminated layer (300 mm thick woven bag bagging sand).
As an alternative embodiment, the middle column barrier system 703 is a column from inside to outside, a first protective layer (600 g/m 2 polyester nonwoven geotextile), a secondary artificial liner (2.0 mm thick single-faced HDPE geotextile), a second protective layer (600 g/m 2 polyester nonwoven geotextile), a master liner (2.0 mm thick single-faced HDPE geotextile), a third protective layer (600 g/m 2 polyester nonwoven geotextile).
The seepage prevention system 700 in the scheme prevents seepage of percolate in a hazardous waste landfill area to the underground or surrounding environment, and effectively isolates diffusion of the percolate by seepage prevention of a substrate, a slope and a middle column respectively, so that the environment cannot be harmed.
As an alternative embodiment, the percolate collecting and guiding and draining system 800 comprises a primary percolate guiding and draining layer, a secondary percolate guiding and draining layer, a guiding and draining pipeline and a water collecting well, wherein the primary percolate guiding and draining layer is arranged between the protective layer 2 and the isolating layer, and consists of pebbles with the thickness of 50cm and the particle size of 30-50 mm and an HDPE perforated water collecting pipe, and is used for collecting and draining percolate. The secondary percolate drainage layer is positioned between the second protective layer and the third impermeable layer and is used for detecting the impermeable condition of an impermeable system at the upper layer of the secondary percolate drainage layer and discharging percolate which is likely to leak, and a 6.3mm composite geotechnical drainage net is selected as a drainage material of the secondary percolate drainage layer for preventing interlayer water stagnation. The primary percolate guide and discharge layer and the secondary percolate guide and discharge layer are sequentially connected with the guide and discharge pipeline and the water collecting well.
As an alternative embodiment, the landfill includes a groundwater drainage system 900, the groundwater drainage system 900 is located below the base seepage prevention system 701, and a reverse filtering layer (200 g/m 2 PE woven geotextile), a groundwater drainage layer (500 mm thick pebbles, with a particle size of 30-50 mm) and a protective layer (600 g/m 2 polyester nonwoven geotextile) are sequentially arranged from bottom to top. The function of the groundwater drainage layer system 900 in this solution in the landfill is to ensure that groundwater is effectively managed and discharged, prevent groundwater from being polluted, and protect the structural stability of the landfill, which is an important component of landfill environment management, and helps to reduce adverse effects on groundwater and surrounding environment.
As an alternative embodiment, the garbage dam encloses the valley-shaped natural foundation layer into a landfill area to form a certain storage capacity, and meanwhile, the overall safety of the storage area is ensured, and in the embodiment, the garbage dam body 30m is high and a slurry-cut stone dam is adopted.
As an alternative embodiment, the landfill site is externally connected with an off-site working road with the width of 4m, and a concrete pavement is adopted. The operation road in this scheme is in the landfill effect of providing effective traffic channel, ensures the transportation and the operation of dangerous waste to satisfy road design rule and prevention of seepage requirement, in order to ensure landfill normal operating, environmental protection and security, this is the indispensable infrastructure in landfill operation and management.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (9)
1. The utility model provides a semi-closed valley type hazardous waste flexible landfill, the landfill includes basement, side slope, rubbish dam, basement, side slope, rubbish dam enclose into semi-closed valley type landfill, its characterized in that:
The landfill further comprises a ceiling, a middle column, side columns, an anti-seepage system, a percolate collecting and guiding and draining system and a groundwater guiding and draining system;
The roof is used for keeping off rain at the upper part of a landfill area and comprises a grid and a roof, wherein the roof adopts a profiled steel sheet, the grid is positioned below the steel sheet to support the steel sheet, and the roof is provided with a light-collecting belt;
The middle columns are positioned in the landfill field and used for supporting the ceiling, the span between the middle columns is 50-60 m, and the height is 8-22 m;
the side columns are positioned at the periphery of the landfill site to form an enclosure structure;
The seepage prevention system is divided into a base seepage prevention system for base seepage prevention, a side slope seepage prevention system for side slope seepage prevention and a middle column seepage prevention system for middle column seepage prevention;
The percolate collecting and guiding and draining system is inserted in the substrate seepage prevention system and is used for collecting and guiding and draining percolate;
The underground water drainage system is positioned below the base seepage-proofing system and is used for guiding and draining underground water.
2. The semi-enclosed valley type hazardous waste flexible landfill of claim 1, wherein: the base seepage-proofing system comprises a first seepage-proofing layer, a second seepage-proofing layer, a first protective layer, a third seepage-proofing layer, a fourth seepage-proofing layer, a second protective layer and an isolation layer from bottom to top.
3. The semi-enclosed valley type hazardous waste flexible landfill of claim 2, wherein: the first impermeable layer consists of compacted clay with the thickness of 300mm and a geotechnical polymerization clay liner with the thickness of 5000g/m 2 GCL, the second impermeable layer is a smooth HDPE geotechnical film with the thickness of 2.0mm, the first protective layer is a polyester nonwoven geotechnical cloth with the thickness of 600g/m 2, the third impermeable layer consists of compacted clay with the thickness of 300mm and a geotechnical polymerization clay liner with the thickness of 5000g/m 2 GCL, the fourth impermeable layer is a smooth HDPE geotechnical film with the thickness of 2.0mm, the second protective layer is a polyester nonwoven geotechnical cloth with the thickness of 600g/m 2, and the isolation layer is a PE woven geotechnical cloth with the thickness of 200g/m 2.
4. The semi-enclosed valley type hazardous waste flexible landfill of claim 1, wherein: the side slope seepage prevention system comprises a protective layer, a secondary artificial lining layer, a secondary seepage detection layer, a master lining layer, a protective layer, a primary seepage detection layer and a laminated layer from bottom to top.
5. The semi-enclosed valley type hazardous waste flexible landfill of claim 4, wherein: the protection layer is 5000g/m 2 GCL geotechnical polymerization bonding pad, the secondary artificial lining layer is a single-wool-surface HDPE geomembrane with the thickness of 2.0mm, the secondary leakage detection layer is a 6.3mm geotechnical composite three-dimensional drainage grid, the primary artificial lining layer is a single-wool-surface HDPE geomembrane with the thickness of 2.0mm, the protection layer is 600g/m 2 polyester non-woven geotechnical cloth, the primary leakage detection layer is a 6.3mm geotechnical composite three-dimensional drainage grid, and the laminated layer is a woven bag with the thickness of 300mm for bagging sand.
6. The semi-enclosed valley type hazardous waste flexible landfill of claim 1, wherein: the middle column seepage-proofing system comprises a column body, a first protective layer, a secondary artificial lining layer, a second protective layer, a master lining layer and a third protective layer from inside to outside.
7. The semi-enclosed valley type hazardous waste flexible landfill of claim 6, wherein: the first protection layer is 600g/m 2 polyester non-woven geotextile, the secondary artificial lining layer is a single-wool-side HDPE geotextile with the thickness of 2.0mm, the second protection layer is 600g/m 2 polyester non-woven geotextile, the primary artificial lining layer is a single-wool-side HDPE geotextile with the thickness of 2.0mm, and the third protection layer is 600g/m 2 polyester non-woven geotextile.
8. The semi-enclosed valley type hazardous waste flexible landfill of claim 2, wherein: the percolate collecting and guiding and draining system comprises a primary percolate guiding and draining layer, a secondary percolate guiding and draining layer, a guiding and draining pipeline and a water collecting well, wherein the primary percolate guiding and draining layer is arranged between a second protective layer and an isolating layer and is composed of pebbles with the thickness of 50cm and the grain size of 30-50 mm and HDPE perforated water collecting pipes, the secondary percolate guiding and draining layer is arranged between the first protective layer and a third impermeable layer, a 6.3mm composite geotechnical drainage net is adopted, and the primary percolate guiding and draining layer and the secondary percolate guiding and draining layer are sequentially connected with the guiding and draining pipeline and the water collecting well.
9. The semi-enclosed valley type hazardous waste flexible landfill of claim 1, wherein: the underground water drainage system sequentially comprises a reverse filtering layer, an underground water drainage layer and a protective layer from bottom to top, wherein the reverse filtering layer is 200g/m 2 PE woven geotextile, the underground water drainage layer is 500mm thick pebbles with the particle size of 30-50 mm, and the protective layer is 600g/m 2 polyester non-woven geotextile.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202323036336.7U CN221297983U (en) | 2023-11-10 | 2023-11-10 | Semi-closed type valley type dangerous waste flexible landfill |
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| CN202323036336.7U CN221297983U (en) | 2023-11-10 | 2023-11-10 | Semi-closed type valley type dangerous waste flexible landfill |
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| CN221297983U true CN221297983U (en) | 2024-07-09 |
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| CN202323036336.7U Active CN221297983U (en) | 2023-11-10 | 2023-11-10 | Semi-closed type valley type dangerous waste flexible landfill |
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