CN215053288U - Covering layer beneficial to recovery of refuse landfill vegetation - Google Patents

Abstract

The utility model provides a covering layer beneficial to the recovery of refuse landfill vegetation, which comprises a greening layer, a protective layer and an exhaust layer, wherein a drainage layer is arranged between the greening layer and the protective layer, an impermeable layer is arranged between the protective layer and the exhaust layer, a thermal insulation layer is arranged between the protective layer and the impermeable layer, and the covering layer can be used for being accumulated on the upper part of a refuse pile body; the heat insulation layer comprises a plurality of layers of honeycomb networks, and expanded vermiculite can be placed inside the honeycomb networks. Through being equipped with the insulating layer between protective layer and the barrier layer, can completely cut off the high temperature that produces at long-term degradation of rubbish and fermentation, avoid too high temperature to cause direct burn to the rhizome of vegetation in afforestation layer bottom, make the plant dead prematurely, can effectively reduce to should make the earth's surface temperature rise because of the rubbish fermentation to make the earth's surface plant produce serious transpiration, influence the absorption of plant to moisture and nutrient. The structure can not damage soil near a refuse factory, has practical significance for accelerating vegetation recovery, and is suitable for popularization and use.

Description

Covering layer beneficial to recovery of refuse landfill vegetation

Technical Field

The utility model relates to a landfill technical field, especially a overburden that does benefit to landfill vegetation and resumes.

Background

With the increase of the population number of cities and towns and the continuous improvement of living standard, the amount of the generated domestic garbage is also increased continuously, and the domestic garbage can pollute the environment if not effectively treated. Therefore, garbage landfill sites are built in all cities for landfill treatment of the household garbage, and pollution of the household garbage to the environment is reduced. The technology of the refuse landfill closing and covering greening system is that after closing is completed, a large amount of clay is covered, vegetation is planted or seeds are broadcast on clay layers, and then later-stage maintenance is carried out on the filled areas, water and gas are treated in time in a targeted manner, meanwhile, the vegetation is restored, the image of the refuse landfill is maintained, and the natural ecological function of the site is gradually restored. If these measures are not done, secondary pollution to the environment will be caused. The heat that the fermentation of the rubbish degradation in the current overburden structure gave out can be up to 70 degrees centigrade, on the one hand, causes direct injury to the growth of plant roots, and on the other hand, the inside high temperature of heap body structure has produced serious transpiration effect and has influenced the absorption of plant analysis to moisture and nutrient. The high temperature can seriously affect the normal growth of the plants planted on the pile, resulting in a low survival rate of the plants planted on the pile, which can not achieve the aim of designing a covering structure. Almost no plants grow on the top of most of the cover layer, or the plants grow too slowly, which affects the field reuse and the surrounding environment in the later period of the cover layer.

Chinese patent document CN 210597403U describes a landfill closing and covering greening structure, which includes: the clay layer is positioned on the garbage layer; the impermeable layer is positioned on the clay layer; an isolation layer on the barrier layer; a composite greening layer on the isolation layer, comprising: a mesh fabric and a filament-like composition fixed to the mesh fabric; and a sand layer disposed between the filamentary compositions of the composite greening layer. Through the structure, the construction cost of the greening engineering of the refuse landfill is reduced, and the sealing, covering and greening can be rapidly completed. However, the problem that the heat emitted by the garbage degradation fermentation in the structure can reach 70 ℃ still cannot be solved by the scheme, the plants grow slowly in the growth process, the covering layer has no exhaust structure, and the overflowing gas can influence the normal growth of the plants planted on the pile body, so that the survival rate of the plants planted on the pile body is low. Meanwhile, the monitoring of various indexes such as temperature and humidity in the garbage pile is lacked, the complex environmental risk in the covering layer cannot be effectively monitored, and the requirement of the existing garbage plant on the covering layer structure cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a overburden that does benefit to landfill vegetation to resume is provided, the heat that avoids the fermentation of the degradation of rubbish in the overburden to give out causes direct injury to plant roots's growth, and high temperature has produced serious transpiration effect and has influenced the phenomenon that plant analysis is to moisture and nutrient absorption. Affecting plant growth on the overburden and thereby affecting restoration of the overburden vegetation from the landfill.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the covering layer comprises a greening layer, a protective layer and an exhaust layer, a water drainage layer is arranged between the greening layer and the protective layer, an impermeable layer is arranged between the protective layer and the exhaust layer, a heat insulation layer is arranged between the protective layer and the impermeable layer, and the covering layer can be stacked on the upper part of the garbage pile body;

the heat insulation layer comprises a plurality of layers of honeycomb networks, and expanded vermiculite can be placed inside the honeycomb networks.

In the preferred scheme, even mesh cloth is arranged between every two layers of honeycomb nets, and iron nails are arranged at the bottoms of the honeycomb nets.

In a preferred embodiment, the cellular network material is a thermoplastic sheet material and the cellular network is comprised of a plurality of polygonal mesh cell structures.

In the preferred scheme, the covering layer further comprises a plurality of exhaust pipes, the air inlet ends of the exhaust pipes are arranged in the exhaust layers, the outlet ends of the exhaust pipes are arranged outside the covering layer, and the exhaust pipes sequentially penetrate through the impermeable layer, the heat insulation layer, the protective layer, the drainage layer and the greening layer from inside to outside.

In a preferable scheme, pebbles with the particle size of 20-40mm are arranged in the exhaust layer, a geotechnical filter screen is arranged on the upper layer of the pebbles, and a filter screen is arranged on the lower layer of the pebbles.

In the preferred scheme, the drainage blanket adopts compound geotechnological drainage network, and compound geotechnological drainage network adopts the overlap joint, and the drainage blanket passes through the platform ponding drainage measure intercommunication of water pipe and overburden one side, and the opposite side intercommunication waste water collection box of platform ponding drainage measure intercommunication.

In the preferred scheme, be equipped with a plurality of temperature sensor and humidity transducer in the rubbish heap physically, temperature sensor and humidity transducer are connected with the sensor monitor screen of overburden one side respectively.

In the preferred scheme, the greening layer is laid by planting soil with the thickness of 500-1000 mm.

In the preferred scheme, the protective layer comprises a clay protective layer and a geotextile bag layer, wherein stone grains are filled in the geotextile bag, and the grain size of the stone grains is 20-40 mm.

In a preferred scheme, the impermeable layer material is a high-density polyethylene geomembrane.

The utility model provides a do benefit to overburden that landfill vegetation resumes, through being equipped with the insulating layer between protective layer and the barrier layer, can completely cut off the long-term degradation of rubbish and the produced high temperature of fermentation, avoid too high temperature to cause direct burn to the rhizome of vegetation in afforestation layer bottom, make the too early death of plant, also can effectively reduce and should make the earth's surface temperature rise because of the fermentation of rubbish to make the earth's surface plant produce serious transpiration effect, influence the absorption of plant to moisture and nutrient. By adopting the structure, the heat insulation layer is convenient to install and uniform in arrangement. Set up facilities such as even screen cloth and iron nail, can ensure each layer stable state in long-term use, can not influence overall stability because of rubbish degradation. The material that each in situ of overburden used is energy-concerving and environment-protective, can not harm near rubbish factory soil, overburden overall structure is simple, the construction of being convenient for, produced waste gas waste water in the overburden can discharge to carry out long-time control to the interior complicated abominable environment of rubbish heap, to recovering with higher speed landfill vegetation, a large amount of water, gaseous can in time discharge when raining, can not cause overall structure to destroy, have very strong realistic meaning, be fit for using widely.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the partial structure of the present invention;

fig. 3 is a schematic top view of a partial structure of the present invention;

FIG. 4 is an enlarged schematic view of a part of the structure of the present invention;

FIG. 5 is a partial cross-sectional view of the present invention;

fig. 6 is an exploded view of a partial structure of the present invention;

in the figure: a greening layer 1; a drainage layer 2; a protective layer 3; a heat insulation layer 4; expanded vermiculite 401; a cellular network 402; uniform mesh 403; a nail 404; an impermeable layer 5; an exhaust layer 6; an exhaust pipe 601; pebbles 602; a garbage pile body 7; a platform accumulated water drainage measure 8; a sensor system 9; a temperature sensor 901; a humidity sensor 902; a sensor monitor screen 903; a waste water collection tank 10.

Detailed Description

Example 1:

as shown in fig. 1 to 6, a covering layer beneficial to recovery of refuse landfill vegetation comprises a greening layer 1, a protective layer 3 and an exhaust layer 6, wherein a drainage layer 2 is arranged between the greening layer 1 and the protective layer 3, an impermeable layer 5 is arranged between the protective layer 3 and the exhaust layer 6, a heat insulation layer 4 is arranged between the protective layer 3 and the impermeable layer 5, and the covering layer can be stacked on the upper part of a refuse pile 7;

the insulating layer 4 comprises a plurality of layers of honeycomb mesh 402, and expanded vermiculite 401 can be placed inside the honeycomb mesh 402. By the structure, the formed heat insulation layer 4 can isolate high temperature generated by long-term degradation and fermentation of garbage, direct burning of roots and stems of plants growing at the bottom of the greening layer due to overhigh temperature is avoided, the plants die too early, and the temperature of the ground surface can be effectively reduced to rise due to garbage fermentation, so that the plants on the ground surface generate serious transpiration, and the absorption of the plants on moisture and nutrients is influenced. The expanded vermiculite can be used as a soil conditioner, and has good cation exchange property and adsorbability, so that the structure of soil can be improved, water can be stored, soil moisture can be preserved, the air permeability and water content of the soil can be improved, and the acid soil can be changed into neutral soil; the vermiculite can also play a role in buffering, prevent the rapid change of the pH value, enable the fertilizer to be slowly released in a crop growth medium, and allow the fertilizer to be used in a slight excess manner without harm to plants; the vermiculite can also provide K, Mg, Ca and Fe contained in the vermiculite and trace elements such as Mn, Cu, Zn and the like to crops. The vermiculite has the characteristics of water absorption, cation exchange and chemical components, so that the vermiculite has multiple functions of fertilizer retention, water storage, air permeability, mineral fertilizer and the like.

In a preferred scheme, uniform mesh cloth 403 is arranged between each layer of the honeycomb mesh 402, and iron nails 404 are arranged at the bottom of the honeycomb mesh 402. With the structure, the heat insulation layer 4 has strong bearing capacity, and is exquisite in structure, applicable and material-saving. The multi-layer and series of continuous honeycomb-shaped net structures can dispersedly bear external force from all sides, so that the honeycomb structure can resist extrusion force and bear large pressure even if the material is very thin. The honeycomb sandwich structure has the advantages of smooth surface, difficult deformation, good impact resistance and good buffering performance, the outstanding pressure resistance and bending resistance are important characteristics of the heat insulation layer, and the honeycomb sandwich structure has a heat insulation effect and is more suitable for the installation of the heat insulation layer.

In a preferred embodiment, the honeycomb 402 is a thermoplastic sheet material and the honeycomb 402 is formed of a plurality of polygonal mesh cell structures. With the structure, the honeycomb network can be softened along with the rise of the temperature and molded, and after the temperature of the heat insulation layer is reduced, the honeycomb network becomes hard after being cooled, and the process can be repeated for many times, so that the overall stability of the heat insulation layer is improved, and the covering layer is in a stable state. The thermoplastic sheet also has excellent mechanical properties, relatively high tensile strength and modulus, and excellent toughness, impact resistance and damage tolerance. The overall stability of the covering layer is improved, the thermoplastic sheet can be recycled and reused, the resource utilization rate is high, and the energy-saving and environment-friendly effects are achieved.

In a preferable scheme, the covering layer further comprises a plurality of exhaust pipes 601, the air inlet ends of the exhaust pipes 601 are arranged in the exhaust layer 6, the outlet ends of the exhaust pipes 601 are arranged outside the covering layer, and the exhaust pipes 601 sequentially penetrate through the impermeable layer 5, the heat insulation layer 4, the protective layer 3, the drainage layer 2 and the greening layer 1 from inside to outside. By this structure, lay simple swift, exhaust effect good, the blast pipe leads directly to in the outer air of overburden, and it is little to occupy the landfill space, prevents the unordered loss of waste gas, avoids waste gas diffusion to lead to the plant weak, grow slowly and easily receive adverse environmental stress, produces low temperature injury and disease gas. The phenomenon that the roots of the plants are suffocated due to the fact that the waste gas is diffused and the root cells, the microorganisms breathe and the organic matters are decomposed can not be formed is avoided.

In a preferable scheme, pebbles 602 with the particle size of 20-40mm are arranged in the exhaust layer 6, a geotechnical filter screen is arranged on the upper layer of the pebbles 602, and a filter screen is arranged on the lower layer of the pebbles 602. With this construction, pebbles 602 act as a collection and drainage medium, and the geotextile screen acts to prevent the entry of waste components or foundation soil into the air displacement layer 6 while allowing the passage of liquid. The geotextile screen is designed to be positioned between the air discharge layer 6 and the pebbles 602. The performance of the earth screen for a landfill site is such as to allow the passage of liquid whilst preventing the passage of refuse and ground soil particles within the site and thereby avoiding fouling of the air discharge layer 6 of the pebbles 602.

In the preferred scheme, drainage blanket 2 adopts compound geotechnological drainage network, and compound geotechnological drainage network adopts the overlap joint, and drainage blanket 2 passes through the platform ponding drainage means 8 intercommunications of water pipe and overburden one side, and the opposite side intercommunication waste water collection box 10 of platform ponding drainage means 8 intercommunications. With the structure, the drainage layer ensures that the garbage leachate can be quickly drained away, so that the water level of the garbage leachate is prevented from being too high, and the risk of garbage leachate leakage is reduced. The drainage time is greatly shortened, and the service life of the road can be prolonged. The underground water of the road can be discharged, and the pore maintenance system can block capillary water under high load. Meanwhile, the composite drainage network has higher tensile strength and rigidity, and can also play roles in isolation of landfill sites and reinforcement of foundations.

In a preferable scheme, a plurality of temperature sensors 901 and humidity sensors 902 are arranged in the garbage stack body 7, and the temperature sensors 901 and the humidity sensors 902 are respectively connected with a sensor monitoring screen 903 on one side of the covering layer. By the structure, the temperature and humidity in the garbage pile body 7 can be monitored for a long time, data generated in the long-time garbage decomposition process can be collected, the change of the internal environment of the garbage pile can be controlled in real time, the stability of a covering layer and the long-term stability of a covering layer system under the complex chemical, permeation, biological and other actions of the garbage pile body can be known in real time, and long-term observation, development and recycling are facilitated.

In the preferred scheme, the greening layer 1 is laid by planting soil with the thickness of 500-1000 mm. By the structure, thick-layer planting soil in the greening layer 1 is laid, namely, a good and thick growing environment is provided for plants, the lower part geotechnical material is protected to play a role for a long time, and the rapid recovery of the refuse landfill vegetation is facilitated.

In the preferred scheme, the protective layer 3 comprises a clay protective layer and a geotextile bag layer, wherein stone grains are filled in the geotextile bag, and the grain diameter of the stone grains is 20-40 mm. The structure provides protection capability for the whole covering layer and plays a supporting role for a garbage plant.

In a preferred scheme, the material of the impermeable layer 5 is a high-density polyethylene geomembrane. By the structure, the high-density polyethylene geomembrane can play a good role in seepage prevention and isolation, has the characteristics of excellent corrosion resistance, high strength, good extensibility, large deformation modulus, acid and alkali resistance, aging resistance, good seepage prevention performance and the like, and can well resist the corrosion effect generated by garbage degradation.

The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (10)

1. The utility model provides a do benefit to overburden that landfill vegetation resumes which characterized by: the covering layer comprises a greening layer (1), a protective layer (3) and an exhaust layer (6), a water drainage layer (2) is arranged between the greening layer (1) and the protective layer (3), an impermeable layer (5) is arranged between the protective layer (3) and the exhaust layer (6), a heat insulation layer (4) is arranged between the protective layer (3) and the impermeable layer (5), and the covering layer can be used for being accumulated on the upper part of the garbage pile body (7);

the heat insulation layer (4) comprises a plurality of layers of honeycomb nets (402), and expanded vermiculite (401) can be placed inside the honeycomb nets (402).

2. The blanket of claim 1 for facilitating recovery of landfill vegetation, wherein: uniform mesh cloth (403) is arranged between every two layers of the honeycomb net (402), and iron nails (404) are arranged at the bottom of the honeycomb net (402).

3. The blanket of claim 2 for facilitating recovery of landfill vegetation, wherein: the cellular network (402) material is a thermoplastic sheet material, and the cellular network (402) is composed of a plurality of polygonal cellular cell structures.

4. The blanket of claim 1 for facilitating recovery of landfill vegetation, wherein: the covering layer further comprises a plurality of exhaust pipes (601), the air inlet ends of the exhaust pipes (601) are arranged in the exhaust layer (6), the outlet ends of the exhaust pipes are arranged outside the covering layer, and the exhaust pipes (601) sequentially penetrate through the impermeable layer (5), the heat insulation layer (4), the protective layer (3), the drainage layer (2) and the greening layer (1) from inside to outside.

5. The blanket of claim 1 for facilitating recovery of landfill vegetation, wherein: pebbles (602) with the particle size of 20-40mm are arranged in the exhaust layer (6), a geotechnical filter screen is arranged on the upper layer of the pebbles (602), and a filter screen is arranged on the lower layer of the pebbles (602).

6. The blanket of claim 1 for facilitating recovery of landfill vegetation, wherein: drainage blanket (2) adopt compound geotechnological drainage network, and compound geotechnological drainage network adopts the overlap joint, and drainage blanket (2) lead to pipe and the platform ponding drainage measure (8) intercommunication of overburden one side, and the opposite side intercommunication waste water collection box (10) of platform ponding drainage measure (8) intercommunication.

7. The blanket of claim 1 for facilitating recovery of landfill vegetation, wherein: a plurality of temperature sensors (901) and humidity sensors (902) are arranged in the garbage pile body (7), and the temperature sensors (901) and the humidity sensors (902) are respectively connected with a sensor monitoring screen (903) on one side of the covering layer.

8. The blanket of claim 1 for facilitating recovery of landfill vegetation, wherein: the greening layer (1) is laid by planting soil with the thickness of 500-1000 mm.

9. The blanket of claim 1 for facilitating recovery of landfill vegetation, wherein: the protective layer (3) comprises a clay protective layer and a geotextile bag layer, wherein stone grains are filled in the geotextile bag, and the grain diameter of the stone grains is 20-40 mm.

10. The blanket of claim 1 for facilitating recovery of landfill vegetation, wherein: the material of the impermeable layer (5) is a high-density polyethylene geomembrane.

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