CN218713332U

CN218713332U - Rubbish normal position isolation structure of closing a yard

Info

Publication number: CN218713332U
Application number: CN202223038457.0U
Authority: CN
Inventors: 崔留洋; 李永军; 马富强; 张敏; 柳旭
Original assignee: Northwest Water Conservancy and Hydropower Engineering Co Ltd
Current assignee: Northwest Water Conservancy and Hydropower Engineering Co Ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-24
Anticipated expiration: 2032-11-14

Abstract

The utility model relates to the technical field of garbage disposal, and discloses a garbage in-situ sealing isolation structure, which comprises a foundation pit, wherein a garbage layer is buried in the foundation pit, a geotechnical exhaust layer is arranged on the surface of the garbage layer, an impermeable layer is arranged on the upper surface of the geotechnical exhaust layer, a geotechnical drainage layer is arranged on the upper surface of the impermeable layer, and a vegetable layer is arranged on the upper surface of the geotechnical drainage layer; the barrier layer includes HDPE geomembrane, epimembranal protective layer and the protective layer under set up respectively in the upper surface and the lower surface of HDPE geomembrane, epimembranal protective layer and the protective layer under all adopt nonwoven geotechnological cloth and geotechnological net core, the geotechnological net core sets up in the middle part of nonwoven geotechnological cloth. The utility model discloses possess better prevention of seepage performance, avoid the phenomenon that the leachate is downflow to cause the pollution, improved refuse treatment's effect.

Description

Rubbish normal position isolation structure of closing a yard

Technical Field

The utility model relates to a refuse treatment technical field especially relates to a rubbish normal position sealing isolation structure.

Background

At present, the treatment of the garbage mainly adopts a landfill mode, and in order to prevent the landfill garbage from polluting the environment, a garbage site needs to be sealed and covered.

The existing refuse landfill closure covering and isolating system mainly comprises a covering support soil layer and a nutrient soil layer, and whether the quality of the closure covering and isolating system directly influences the landfill refuse to pollute the environment or not. However, the existing sealing covering isolation structure has poor permeability resistance, and leachate on the surface can permeate and flow downwards to pollute a garbage layer and a soil layer, so that the garbage in-situ sealing isolation structure is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of poor seepage prevention performance of the garbage in-situ sealing isolation structure in the prior art and providing the garbage in-situ sealing isolation structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a garbage in-situ sealing isolation structure comprises a foundation pit, wherein a garbage layer is buried in the foundation pit, a geotechnical exhaust layer is arranged on the surface of the garbage layer, an impermeable layer is arranged on the upper surface of the geotechnical exhaust layer, a geotechnical drainage layer is arranged on the upper surface of the impermeable layer, and a vegetable layer is arranged on the upper surface of the geotechnical drainage layer;

the barrier layer includes HDPE geomembrane, epimembranal protective layer and membrane under protective layer set up respectively in the upper surface and the lower surface of HDPE geomembrane, epimembranal protective layer and membrane under protective layer all adopt nonwoven geotechnological cloth and geotechnological net core, the geotechnological net core sets up in the middle part of nonwoven geotechnological cloth.

Preferably, the thickness of the geotechnical air exhaust layer is 7.5mm, the thickness of the impermeable layer is 1.5mm, and the thickness of the geotechnical drainage layer is 7.5mm.

Preferably, the vegetation layer is a natural soil layer, and the thickness of the natural soil layer is 0.3m.

Preferably, the HDPE geomembrane is fixedly connected by adopting double-rail hot-melt welding, single-rail hot-melt welding or staggered welding.

Preferably, the length direction of the geotechnical drainage layer is longitudinally laid, and the water flow direction of the geotechnical drainage layer is longitudinally arranged.

Preferably, an anchoring groove is arranged at the edge of the top of the foundation pit.

Compared with the prior art, the utility model provides a rubbish normal position sealing isolation structure possesses following beneficial effect:

1. this rubbish normal position closure isolating structure, HDPE geomembrane, epimembranal protective layer and the lower protective layer that is equipped with, HDPE geomembrane covers realizes domestic waste sanitary processing field distribution of rain and sewage, reduces the filtration liquid and handles, and effective processing utilizes landfill gas and improves the key of environment, and epimembranal protective layer and the lower protective layer of membrane can protect the lower floor of HDPE geomembrane simultaneously, ensure the life of HDPE geomembrane.

2. This rubbish normal position isolation structure of closing a yard adopts double track heat fusion welding, single track heat fusion welding or crisscross welding fixed connection through the HDPE geomembrane, can be with firm the welding between the adjacent HDPE geomembrane, to the perfection and the improvement of the welding technique of HDPE geomembrane, realize the important guarantee that the HDPE geomembrane covers the effect as rubbish.

The part that does not relate to among the device all is the same with prior art or can adopt prior art to realize, the utility model discloses possess better prevention of seepage performance, avoid the phenomenon that the downward pollution that causes of leachate, improved refuse treatment's effect.

Drawings

Fig. 1 is a schematic structural view of a garbage in-situ sealing isolation structure provided by the present invention;

fig. 2 is a schematic structural diagram of the protective layer on the film and the protective layer under the film according to the present invention.

In the figure: 1. a foundation pit; 2. a waste layer; 3. an earthwork exhaust layer; 4. an impermeable layer; 5. a geotechnical drainage layer; 6. a vegetable layer; 7. HDPE geomembranes; 8. a protective layer on the film; 9. a protective layer under the film; 10. non-woven geotextile; 11. and (4) a geonet core.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, a garbage in-situ sealing isolation structure comprises a foundation pit 1, wherein an anchoring ditch is arranged at the edge of the top of the foundation pit 1, a garbage layer 2 is buried in the foundation pit 1, a geotechnical exhaust layer 3 is arranged on the surface of the garbage layer 2, an impermeable layer 4 is arranged on the upper surface of the geotechnical exhaust layer 3, a geotechnical drainage layer 5 is arranged on the upper surface of the impermeable layer 4, the length direction of the geotechnical drainage layer 5 is laid longitudinally, the water flow direction of the geotechnical drainage layer 5 is arranged longitudinally, a vegetation layer 6 is arranged on the upper surface of the geotechnical drainage layer 5, the vegetation layer 6 is a natural soil layer, and the thickness of the natural soil layer is 0.3m;

the barrier layer 4 includes HDPE geomembrane 7, protective layer 8 and the protective layer 9 under the membrane on the membrane, protective layer 8 and the protective layer 9 under the membrane set up respectively in HDPE geomembrane 7's upper surface and lower surface, protective layer 8 and protective layer 9 all adopt nonwoven geotechnique cloth 10 and geotechnological net core 11 on the membrane, geotechnological net core 11 sets up in the middle part of nonwoven geotechnological cloth 10, nonwoven geotechnological cloth 10 and geotechnological net core 11 must contact the barrier, protective layer 8 has the remainder on the membrane, the remainder of protective layer 8 on the membrane will be enough to roll over back to below geotechnological drainage blanket 5, the geotechnological net core 11 that the protection exposes, prevent that the small soil grain from getting into the flow channel of geotechnological net core 11.

The thickness of the geotechnical air exhaust layer 3 is 7.5mm, the thickness of the impermeable layer 4 is 1.5mm, and the thickness of the geotechnical drainage layer 5 is 7.5mm.

The HDPE geomembrane 7 is fixedly connected by adopting double-rail hot-melt welding, single-rail hot-melt welding or staggered welding, and the perfection and improvement of the welding technology of the HDPE geomembrane 7 are important guarantees for realizing the function of covering garbage by the HDPE geomembrane.

The utility model discloses in, prepare before the construction

1. Before the construction of the impervious structural layer, the foundation pit 1 field and the side slope should be finely finished in place, and the foundation should be uniform and dense.

2. Before covering, the surface of the foundation pit 1 and the anchoring ditch are inspected, and sharp objects causing damage to the anti-seepage material, such as stones, tree roots, reinforcing steel bar heads, glass and the like, cannot be contained.

3. And reasonably planning and partitioning the garbage pile body before closing and covering, and constructing according to the partition area sequence.

4. And arranging the number of people, materials and machines meeting the construction progress requirement according to the divided areas.

5. And (3) checking the surface of the composite geotechnical drainage layer 5 to determine whether oil stains, fuels or splashed chemical spots exist, and timely cleaning the oil stains, the fuels and the splashed chemical spots.

6. The wearing inspection of the operating personnel firstly ensures that the working shoes are soft-bottom flat-bottom heelless working shoes, and the tack shoes and the shoes with iron soles cannot enter the field for operation.

Laying of the geotechnical air exhaust layer 3 and the geotechnical drainage layer 5

The geotechnical air exhaust layer 3 and the geotechnical drainage layer 5 are different in structure parts and have different functions, but the used materials are the same, and the construction process is consistent.

The laid geotechnical drainage layer 5 needs to be dry and tidy, and only products with qualified quality can be used.

The geotechnical drainage layer 5 only allows professional construction equipment and personnel with corresponding qualifications to carry out construction, only an approved tool box or tool bag can be used, and the equipment and tools cannot be placed on the surface of the geotechnical drainage layer 5.

The manual rolling operation mode is adopted for paving, when the barriers (such as the discharge pipe or the monitoring well) are met in the process of paving the geotechnical drainage layer 5, the geotechnical drainage layer must be cut, and when the barriers are paved, no gap is formed between the barriers and the materials.

The wrinkles and the creases are avoided as much as possible during the laying, the paving surface is guaranteed to be smooth and straight, the gap between the adjacent geotechnical water drainage layers 5 is adjusted, and the seamless lap joint of the geotechnical water drainage layers 5 is guaranteed.

The ligature tie interval satisfies the requirement, and through the inspection after qualified, weld adjacent geotechnological drainage 5, form wholly.

7. When not laying HDPE geomembrane 7, carry out the finished product protection to geotechnological drainage blanket 5 that has accomplished, avoid the good material of mating formation to receive destruction, if when meeting the wind, must have sufficient interim ballast thing or earth anchor (sand bag or geotextile coiled material) in order to prevent that geotechnological drainage blanket 5 of laying is blown by the strong wind.

8. All data related to the construction quality assurance aspect, including the timely records of the laying, repairing, testing and the like of the geotechnical drainage layer 5, are ready for detection and searching.

HDPE geomembrane 7 construction

1. Before the seepage-proofing material is formally laid, the site needs to be comprehensively checked and confirmed, the quality of the seepage-proofing material (various technical indexes, whether wrinkles, bubbles, damage and the like exist on the surface) is strictly checked, and the seepage-proofing material can be laid without errors.

2. Each material to be laid is numbered according to the roll, and the materials are laid in sequence, and the material numbers are submitted to a supervision engineer for record so as to facilitate detection.

3. The amount of paving material per day should be no greater than the amount that can be welded on the day.

4. And stopping the laying work when the temperature is too high, too low, rainfall, ponding or strong wind weather occurs.

5. During the construction process, workers and field personnel should wear shoes which do not damage the impermeable material, and must not engage in activities which may damage the impermeable material, such as smoking, etc.

6. When the anti-seepage material coiled material is laid, the anti-seepage material coiled material is naturally unfolded to ensure that the phenomena of material deformation, wrinkling and material performance damage caused by stretching do not occur.

7. And (3) pressing and placing heavy objects such as sand and soil bags which do not damage the materials in time on the laid impermeable materials to prevent the materials from being blown by wind.

8. If the foundation is damaged during the laying process, the foundation should be repaired in time, and the foundation can be laid after repeated compaction and acceptance by a supervision engineer.

9. The material is prevented from shrinking and wrinkling or generating stress due to temperature change, joint welding is carried out on the paved material in time, and the protective layer is covered in time after the material is qualified through inspection.

10. In the process of laying and welding the anti-seepage material, a supervision engineer checks operation procedures, laying and welding quality in time, and has the right to provide detection for obvious defects or damaged parts and require a construction unit to repair until the detection is qualified.

11. In the laying process, the folds are pushed to the greatest extent, and on the premise of obtaining the consent of a supervision engineer, redundant parts can be cut off and the seams can be repaired.

And paving a vegetation layer 6, paving a 0.3m natural soil layer, and then planting green plants to ensure that the field sealing coverage thickness is 0.7m.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The in-situ sealing isolation structure for the garbage comprises a foundation pit (1) and is characterized in that a garbage layer (2) is buried in the foundation pit (1), a geotechnical exhaust layer (3) is arranged on the surface of the garbage layer (2), an impermeable layer (4) is arranged on the upper surface of the geotechnical exhaust layer (3), a geotechnical drainage layer (5) is arranged on the upper surface of the impermeable layer (4), and a vegetable layer (6) is arranged on the upper surface of the geotechnical drainage layer (5);

impermeable layer (4) include HDPE geomembrane (7), epimembranal protective layer (8) and membrane lower protective layer (9) set up respectively in the upper surface and the lower surface of HDPE geomembrane (7), epimembranal protective layer (8) and membrane lower protective layer (9) all adopt nonwoven geotechnological cloth (10) and geotechnique's net core (11), geotechnological net core (11) set up in the middle part of nonwoven geotechnological cloth (10).

2. A waste in-situ sealing and isolating structure according to claim 1, wherein the thickness of the geotechnical air-release layer (3) is 7.5mm, the thickness of the impermeable layer (4) is 1.5mm, and the thickness of the geotechnical water-drainage layer (5) is 7.5mm.

3. The in-situ refuse sealing and isolating structure according to claim 1, wherein the vegetation layer (6) is a natural soil layer, and the thickness of the natural soil layer is 0.3m.

4. The in-situ refuse landform isolation structure according to claim 1, wherein the HDPE geomembrane (7) is fixedly connected by double-rail hot-melt welding, single-rail hot-melt welding or staggered welding.

5. A refuse in-situ sealing isolation structure according to claim 1, wherein the length direction of the geotechnical drainage layer (5) is laid longitudinally, and the water flow direction of the geotechnical drainage layer (5) is arranged longitudinally.

6. A refuse in-situ sealing isolation structure according to claim 1, characterized in that an anchoring ditch is arranged at the top edge of the foundation pit (1).