阅读说明：本技术 一种用于生活垃圾处理的填埋场高效防渗方法 (Efficient anti-seepage method for landfill for domestic garbage treatment ) 是由 黎忠琴 于 2020-05-18 设计创作，主要内容包括：本发明公开了一种用于生活垃圾处理的填埋场高效防渗方法,属于防渗处理技术领域,可以实现通过分层防渗的方式作为防渗基础,创新性的引入沉降双态减水层,利用微生物处理垃圾渗滤液的特性,将生活垃圾填埋时的垃圾渗滤液和微生物处理过程中产生的热量,双重沉降引流至沉降双态减水层,先通过分流吸附过滤结合微生物处理,对垃圾渗滤液中的污染成分进行分解,其次通过储蓄吸收来的热量对垃圾渗滤液进行加热使其蒸发,并沿预埋的管道向填埋场外排出进行收集回收利用水资源和热能,通过主动引流并促使双态变化的方式,对垃圾渗滤液进行高效处理,从而显著提高填埋场的防渗效果。(The invention discloses a high-efficiency anti-seepage method for a landfill for domestic garbage treatment, which belongs to the technical field of anti-seepage treatment, can realize that the sedimentation dual-state water reducing layer is innovatively introduced by taking a layered seepage-proofing mode as a seepage-proofing foundation, the garbage percolate generated during the landfill of the domestic garbage and the heat generated in the microbial treatment process are dually sedimentated and drained to the sedimentation dual-state water reducing layer by utilizing the characteristic of the microbial treatment of the garbage percolate, the pollutant components in the garbage percolate are decomposed by combining the shunting adsorption filtration with the microbial treatment, secondly, the absorbed heat is stored to heat the landfill leachate to evaporate, and the landfill leachate is discharged to the outside of the landfill along the pre-buried pipeline to collect and recycle water resources and heat energy, the landfill leachate is efficiently treated in a mode of actively draining and promoting the change of a two-state, so that the anti-seepage effect of a landfill site is obviously improved.)

1. A high-efficiency anti-seepage method for a landfill for domestic garbage treatment is characterized by comprising the following steps: the method comprises the following steps:

s1, site selection and excavation: selecting an area far away from human activities to carry out earth excavation according to a design drawing, and keeping a slope at a certain gradient to prevent collapse;

s2, early preparation: leveling, rolling and tamping a field of a landfill area, taking materials in situ, filling soil by using an excavator to form a soil seepage-proofing bottom layer (1) on the surface of a base layer, and compacting;

s3, underground water guide and drainage: digging an underground water guide and drainage underdrain, distributing drainage pipes, arranging graded sand and pebbles, reserving the installation position of the underground water guide and drainage pipes when laying the graded sand and pebbles, and installing the underground water guide and drainage pipes in time to form an underground water guide and drainage layer (21);

s4, construction of an anti-seepage bottom layer: naturally loosening and flatly paving the bentonite waterproof blanket (5) on the underground water guide and drainage layer (21), paving one surface of non-woven fabric downwards and the other surface of the woven fabric upwards, paving a double-smooth-surface HDPE (high-density polyethylene) geotechnical basement membrane (6) on the bentonite waterproof blanket (5), and paving a 30 cm-thick gravel layer (7) on the double-smooth-surface HDPE geotechnical basement membrane (6) after finishing;

s5, construction of an impermeable edge layer: firstly, covering soil on a slope and compacting to form a soil seepage-proofing side layer (14), paving a double-smooth-surface HDPE (high-density polyethylene) geomembrane (15) on the soil seepage-proofing side layer (14), and piling bagged clay to form a seepage-proofing film bag protective layer (17) after the soil seepage-proofing side layer (14) is finished;

s6, construction of a sedimentation dual-state water reducing layer: a layer of expanded perlite heat-insulating layer (8) with the thickness of 20cm is laid on the anti-seepage bottom layer, a plurality of air supply pipes (18) are embedded, two ends of each air supply pipe (18) respectively extend to the outside of the pit along the side slope, meanwhile, a plurality of heat collecting blocks (10) are uniformly embedded in the expanded perlite heat insulation layer (8), the heat collecting blocks (10) are welded with extension type heat conducting rods (2) in sections, and the long-fiber woven geotextile is immediately sleeved on the first section of the extension type heat conducting rod (2) after the welding is finished, a water and air guide block (9) is arranged between the gaps of the long-fiber woven geotextile corresponding to the heat collecting blocks (10), a ventilating support column pipe (12) used for supporting long-fiber woven geotextile is welded between the lower end of the water-guiding air-supplementing block (9) and the air-supplementing pipe (18), steam escape pipes (19) which are distributed at intervals with the air-supplementing pipe (18) are also arranged on the side slope, and the steam escape pipes (19) respectively extend into the long-fiber woven geotextile and out of the pit;

s7, ending work: mortar is poured on the slope to form a mortar curtain layer (20) covering the air supply pipe (18) and the steam escape pipe (19), and an annular water intercepting groove (4) is excavated at a position 1-2m outside the pit.

2. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 1, which is characterized in that: the thickness of the soil seepage-proofing bottom layer (1) in the step S2 is not less than 1m, and the thickness of the soil seepage-proofing edge layer (14) in the step S5 is not less than 75 cm.

3. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 1, which is characterized in that: the bagged clay in the step S5 is filled in the anti-seepage geomembrane bag, the filling thickness of the clay is kept between 5cm-10cm, then the bagged clay of the first layer is laid, the adjacent bagged clays are ensured to be close to each other during laying, the bagged clay of the first layer is laid after the laying of the bagged clay of the first layer is finished, the bagged clay of the second layer is laid, and the staggered arrangement between the bagged clay of the upper layer and the bagged clay of the lower layer is ensured in the bagged clay laying process, so that the anti-seepage effect of the bagged clay is improved.

4. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 1, which is characterized in that: and a needled long-fiber polyester non-woven geotextile is further laid between the double-optical-surface HDPE geotechnical bottom film (6) and the gravel layer (7) in the step S4, and a three-dimensional composite geotechnical drainage grid (16) is further laid between the double-optical-surface HDPE geotechnical side film (15) and the anti-seepage film bag protective layer (17) in the step S6.

5. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 1, which is characterized in that: and in the step S4, the double-smooth-surface HDPE geotechnical basement membrane (6) is laid on the bentonite waterproof blanket (5), is stretched and flattened without large bubbles, is pressed and flattened, avoids heavy machinery such as an excavator and the like from rolling or turning and walking on the laid impermeable membrane, the lap joint edge between the double-smooth-surface HDPE geotechnical basement membrane (6) and the double-smooth-surface HDPE geotechnical basement membrane (6) is not less than ten centimeters, and the edge is kept clean and free of impurities and stones.

6. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 1, which is characterized in that: the water guide air supplement block (9) is a hemispherical shell with an upward spherical surface and is communicated with the ventilation pillar pipe (12), the outer end of the water guide air supplement block (9) is provided with a plurality of air supplement micropores (22) which are uniformly distributed, and a waterproof breathable film (23) is fixedly connected in the air supplement micropores (22).

7. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 1, which is characterized in that: an embedding decomposition block (11) wrapping the extension type heat conducting rod (2) is filled between the adjacent water and air supplying blocks (9), the embedding decomposition block (11) is made of porous adsorption materials, and microbial colonies are cultured on the porous adsorption materials.

8. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 7, wherein the seepage-proofing method comprises the following steps: the lower end of the embedding decomposition block (11) is connected with a plurality of double-state conversion rods (13) which are uniformly distributed in an embedded mode, each double-state conversion rod (13) comprises a water guide cladding (131) and a heat conduction carbon fiber needle (132) wrapped on the outer surface of the water guide cladding (131), and the lower end of the water guide cladding (131) is in contact with the heat gathering block (10).

9. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 8, wherein the seepage-proofing method comprises the following steps: the water guide cladding (131) is prepared by mixing high-molecular water-absorbing resin and water-absorbing fluff fibers in a ratio of 1: 1.

10. The efficient seepage-proofing method for the landfill site for the household garbage disposal according to claim 1, which is characterized in that: the landfill site adopts a layered landfill mode of domestic garbage, a drainage fixing net (3) is covered in advance and is welded with the adjacent extending type heat conducting rod (2) when one layer of domestic garbage is buried, and the drainage fixing net (3) is located in the middle of each layer of domestic garbage.

Technical Field

The invention relates to the technical field of anti-seepage treatment, in particular to a high-efficiency anti-seepage method for a landfill for treating household garbage.

Background

The leakage of the refuse landfill pollutes the environment and has great harm, after the soil is polluted, the soil can be salinized and poisoned, pathogens such as parasites, pathogenic bacteria and the like in the soil can cause diseases, the infiltration can also pollute the underground water, and finally the soil enters a food chain of human beings to cause serious damage to the human bodies. The use of HDPE geomembranes of 1 to 2 mm thickness in landfill anti-seepage treatment since the 80 s abroad has become a mature technology and is increasingly used. The environment-friendly landfill of China starts late, but under the attention of the national general environmental protection bureau and the improvement of the consciousness of national environmental protection in recent years, the environment-friendly landfill adopting HDPE anti-seepage treatment is widely applied nationwide.

The landfill leachate is high-concentration wastewater which is formed by deducting the saturated water holding capacity of garbage and a soil covering layer from water contained in the garbage in a garbage landfill, rain, snow and water entering the landfill and other water and passing through the garbage layer and the soil covering layer. The water quality of the landfill leachate is quite complex, the landfill leachate generally contains high-concentration organic matters, heavy metal salts, SS and ammonia nitrogen, and the landfill leachate not only pollutes soil and surface water sources, but also pollutes underground water

The existing landfill seepage-proofing system is simple, has a poor seepage-proofing effect, generally has a good seepage-proofing effect on outside water, but the garbage penetrating fluid with high pollution degree is difficult to treat and difficult to treat by means of microorganism treatment in garbage, and the seepage-proofing effect is inevitably reduced to cause seepage with different degrees along with the lapse of time.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a high-efficiency anti-seepage method for a landfill for treating domestic garbage, which can realize that the landfill leachate generated in the process of landfill and heat generated in the process of microorganism treatment are dually settled and drained to a settlement dual-state water reducing layer by using a layered anti-seepage mode as an anti-seepage foundation and innovatively introducing the settlement dual-state water reducing layer by utilizing the characteristic of the microorganism treatment of the landfill leachate, firstly, pollutant components in the landfill leachate are decomposed by combining shunting adsorption filtration and the microorganism treatment, secondly, the landfill leachate is heated and evaporated by storing the absorbed heat, and the landfill leachate is discharged to the outside of the landfill along a pre-buried pipeline to collect and recycle water resources and heat energy, and the landfill leachate is efficiently treated by actively draining and promoting the dual-state change, thereby obviously improving the anti-seepage effect of the landfill.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A high-efficiency anti-seepage method for a landfill for domestic garbage treatment comprises the following steps:

s1, site selection and excavation: selecting an area far away from human activities to carry out earth excavation according to a design drawing, and keeping a slope at a certain gradient to prevent collapse;

s2, early preparation: leveling, rolling and tamping a field of a landfill area, taking materials in situ, filling soil by using an excavator to form a soil seepage-proofing bottom layer on the surface of a base layer, and compacting;

s3, underground water guide and drainage: digging an underground water guide and drainage underdrain, distributing drainage pipes, arranging graded sand and pebbles, reserving the installation position of the underground water guide and drainage pipes when laying the graded sand and pebbles, and installing the underground water guide and drainage pipes in time to form an underground water guide and drainage layer;

s4, construction of an anti-seepage bottom layer: the bentonite waterproof blanket is naturally loosened and flatly paved on the underground water drainage guide layer, one surface of the non-woven fabric faces downwards, the other surface of the woven fabric faces upwards, then the double-smooth-surface HDPE geotechnical bottom film is paved on the bentonite waterproof blanket, and after the double-smooth-surface HDPE geotechnical bottom film is paved, a crushed stone layer with the thickness of 30cm is paved on the double-smooth-surface HDPE geotechnical bottom film;

s5, construction of an impermeable edge layer: covering soil on the slope and compacting to form a soil seepage-proofing edge layer, laying a double-smooth-surface HDPE (high-density polyethylene) geotechnical edge film on the soil seepage-proofing edge layer, and stacking bagged clay to form a seepage-proofing film bag protective layer;

s6, construction of a sedimentation dual-state water reducing layer: laying an expanded perlite heat insulation layer with the thickness of 20cm on the anti-seepage bottom layer, embedding a plurality of air supply pipes, wherein two ends of each air supply pipe respectively extend out of the pit along a side slope, simultaneously embedding a plurality of heat accumulation blocks in the expanded perlite heat insulation layer uniformly, welding extension type heat conduction rods on the heat accumulation blocks in a segmented mode, penetrating and sleeving long-fiber woven geotextile immediately after the welding of the extension type heat conduction rods at the first section is finished, placing water-guiding air supply blocks between gaps, corresponding to the heat accumulation blocks, on the long-fiber woven geotextile, welding air-ventilating pillar pipes for supporting the long-fiber woven geotextile between the lower ends of the water-guiding air supply blocks and the air supply pipes, arranging air escape pipes which are distributed at intervals with the air supply pipes on the side slope, and respectively extending into the long-fiber woven geotextile and out of the pit;

s7, ending work: and pouring mortar on the side slope to form a mortar curtain layer covering the air supply pipe and the steam escape pipe, and excavating an annular water intercepting groove 1-2m outside the pit.

Further, the thickness of the soil impermeable bottom layer in the step S2 is not less than 1m, and the thickness of the soil impermeable edge layer in the step S5 is not less than 75 cm.

Further, the bagged clay in the step S5 is filled in the anti-seepage geomembrane bag, the filling thickness of the clay is kept between 5cm and 10cm, then the bagged clay of the first layer is laid, it is ensured that the bagged clay of the adjacent layers are close to each other during laying, the bagged clay of the first layer is laid after the bagged clay of the first layer is laid, the bagged clay of the second layer is laid, and the bagged clay of the upper layer and the bagged clay of the lower layer are arranged in a staggered mode in the process of laying the bagged clay, so that the anti-seepage effect of the bagged clay is improved.

Further, still laid the long fiber polyester non-woven geotextile of acupuncture between two plain noodles HDPE geotechnological basement membrane and the metalling in step S4, still laid three-dimensional compound geotechnological drainage net between two plain noodles HDPE geotechnological border membrane and the prevention of seepage membrane bag inoxidizing coating in step S6, the long fiber polyester non-woven geotextile of acupuncture plays the effect of the two plain noodles HDPE geotechnological basement membranes of protection, avoids appearing damaged phenomenon under the oppression effect on the metalling, and three-dimensional compound geotechnological drainage net then plays the guard action to two plain noodles HDPE geotechnological border membranes, plays level and smooth and lays fixed effect to bagged clay simultaneously.

Further, in the step S4, the double-smooth-surface HDPE geomembrane is laid on the bentonite waterproof blanket, stretched and flattened without large bubbles, and pressed and flattened, so that heavy machinery such as an excavator and the like is prevented from rolling, turning or walking on the laid impermeable membrane, the lap joint edge between the double-optical-surface HDPE geomembrane and the double-optical-surface HDPE geomembrane is not less than ten centimeters, and the edge is kept clean and free of impurities and stones.

Furthermore, the water guide and air supplement block is a hemispherical shell with an upward spherical surface and is communicated with the ventilation support column pipe, a plurality of air supplement micropores which are uniformly distributed are formed in the outer end of the water guide and air supplement block, waterproof breathable films are fixedly connected in the air supplement micropores, the spherical shape characteristics of the water guide and air supplement block can enable settled water to flow into the embedding decomposition block under the action of gravity to be intensively treated, and the external air can be continuously conveyed onto the embedding decomposition block by utilizing the communication effect of the ventilation support column pipe, so that the efficient treatment effect of microorganisms on the embedding decomposition block is always kept.

Further, it is adjacent it has the embedding decomposition piece that the extension formula heat conduction pole was lived to the parcel to fill between the water guide air supplement piece, the embedding decomposition piece adopts porous adsorption material to make, the last microorganism fungus colony that has of cultivation of porous adsorption material, porous adsorption material can cultivate more microorganism fungus colonies on the one hand, and the excellent adsorption of on the other hand self can filter impurity and pollutant in the most landfill leachate, and the microorganism fungus colony plays the decomposition to the pollutant as last barrier, provides a large amount of heats that the decomposition produced nearby simultaneously, is favorable to concentrating the heat in water guide air supplement piece then to the landfill leachate heating evaporation.

Furthermore, the lower end of the embedding decomposition block is connected with a plurality of double-state conversion rods which are uniformly distributed in an embedded mode, each double-state conversion rod comprises a water guide covering layer and a heat conduction carbon fiber needle which is wrapped on the outer surface of the water guide covering layer, the lower end of the water guide covering layer is in contact with the heat accumulation block, the water guide covering layer plays a role in guiding water and absorbing garbage percolate in the embedding decomposition block, the heat conduction carbon fiber needles play a role in heating the garbage percolate, the water guide covering layer is wrapped on the outer surface of the heat conduction carbon fiber needles, on one hand, the contact area is increased to promote the heating effect, on the other hand, the heat dissipation can be reduced.

Furthermore, the water guide covering layer is prepared by mixing the high-molecular water-absorbent resin and the water-absorbent fluff fibers in a ratio of 1:1, has extremely strong water absorption and water retention, and can lock water so as not to continuously permeate downwards even if the water cannot be heated to the evaporation temperature due to insufficient heat in the process of fluctuation of microbial action, and continuously store heat to the evaporation temperature and then guide the heat to the evaporation temperature by virtue of a steam escape pipe.

Further, the landfill adopts the mode of layering landfill domestic waste, and every landfill one deck domestic waste should cover the solid net of drainage in advance and weld with adjacent extension formula heat conduction pole, and guarantee that the solid net of drainage is located the centre of each layer domestic waste, the solid net of drainage plays the firm effect to rubbish on the one hand, avoid the too much phenomenon that appears the migration of landfill, can have certain influence to the prevention of seepage, on the other hand can play drainage landfill leachate and quick endothermic effect, the indirect improvement subsides the water reducing effect of two-state water reducing layer.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme can realize that the garbage percolate during the landfill is buried by using a layered seepage prevention mode as an seepage prevention foundation, a sedimentation bimodal water reducing layer is innovatively introduced, the characteristic of treating the garbage percolate by using microorganisms is utilized, the garbage percolate and heat generated in the microorganism treatment process are dually sedimentated and drained to the sedimentation bimodal water reducing layer, the microbial treatment is combined through shunting, adsorbing and filtering firstly, the pollutant components in the garbage percolate are decomposed, the garbage percolate is heated by storing and absorbing the heat to be evaporated, the garbage percolate is discharged to the outside of a landfill along a pre-buried pipeline to collect and recycle water resources and heat energy, the garbage percolate is efficiently treated by actively draining and promoting bimodal change, and the seepage prevention effect of the landfill is obviously improved.

(2) The bagged clay is filled in the anti-seepage geomembrane bag, the filling thickness of the clay is kept between 5cm-10cm, then the first layer bagged clay is laid, the adjacent bagged clay is ensured to be close to each other during laying, the first layer bagged clay is laid and is continuously laid on the second layer bagged clay after being laid, and the bagged clay laying process is ensured to realize the staggered arrangement between the upper layer bagged clay and the lower layer bagged clay, so that the anti-seepage effect of the bagged clay is improved.

(3) Still laid the long fiber polyester non-woven geotextile of acupuncture between two plain noodles HDPE geotechnical basement membrane and the metalling, still laid three-dimensional compound geotechnological drainage net between two plain noodles HDPE geotechnological border membrane and the prevention of seepage membrane bag inoxidizing coating in step S6, the long fiber polyester non-woven geotextile of acupuncture plays the effect of protection two plain noodles HDPE geotechnological basement membrane, avoid appearing damaged phenomenon under the oppression effect of metalling, three-dimensional compound geotechnological drainage net then plays the guard action to two plain noodles HDPE geotechnological border membranes, play simultaneously to bagged clay level and lay fixed effect.

(4) The water guide air supplement block is a hemispherical shell with an upward spherical surface and is communicated with the ventilation support column pipe, a plurality of air supplement micropores which are uniformly distributed are formed in the outer end of the water guide air supplement block, waterproof breathable films are fixedly connected in the air supplement micropores, the spherical shape characteristics of the water guide air supplement block can enable settled water to flow to the embedding decomposition block under the action of gravity to be intensively treated, and the communication effect of the ventilation support column pipe can be utilized to continuously convey external air to the embedding decomposition block, so that the efficient treatment effect of microorganisms on the embedding decomposition block is always kept.

(5) It has the embedding decomposition piece that the parcel lived extension formula heat-conducting rod to fill between the adjacent water guide tonifying qi piece, the embedding decomposition piece adopts porous adsorption material to make, the last cultivation of porous adsorption material has the microorganism fungus colony, porous adsorption material can cultivate more microorganism fungus colonies on the one hand, on the other hand self excellent adsorption can filter impurity and pollutant in the most landfill leachate, the microorganism fungus colony plays the decomposition to the pollutant as last barrier, provide a large amount of heats that the decomposition produced nearby simultaneously, be favorable to concentrating the heat in water guide tonifying qi piece then to the landfill leachate heating evaporation.

(6) The lower end of the embedding decomposition block is embedded with a plurality of binary conversion rods which are uniformly distributed, each binary conversion rod comprises a water guide covering layer and a heat conduction carbon fiber needle wrapped on the outer surface of the water guide covering layer, the lower end of the water guide covering layer is in contact with the heat accumulation block, the water guide covering layer plays a role in guiding and absorbing landfill leachate in the embedding decomposition block, the heat conduction carbon fiber needles play a role in heating the landfill leachate, the water guide covering layer wraps the outer surface of the heat conduction carbon fiber needles, on one hand, the contact area is increased to promote the heating effect, on the other hand, the heat loss can be reduced, and the heat energy is effectively utilized.

(7) The water guide covering layer is prepared by mixing high-molecular water-absorbent resin and water-absorbent fluff fibers in a ratio of 1:1, has extremely strong water absorption and water retention, and can prevent water from continuously permeating downwards even if the water cannot be heated to the evaporation temperature due to insufficient heat in the process of fluctuation of microbial action, and can guide the water to flow out by virtue of the steam escape pipe after continuously storing heat to the evaporation temperature.

(8) The mode that the landfill adopted the layering landfill domestic waste, every landfill one deck domestic waste should cover the drainage in advance and fix the net and weld with adjacent extension formula heat conduction pole, and guarantee that the drainage is fixed the net and be located the centre of each layer domestic waste, the drainage is fixed the net and is played the firm effect to rubbish on the one hand, avoid the too much phenomenon that appears the migration of landfill, can have certain influence to the prevention of seepage, on the other hand can play drainage landfill leachate and quick endothermic effect, the indirect water reduction effect that subsides the bimorph water reducing layer that improves.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic structural view of a bimodal conversion rod according to the present invention;

FIG. 4 is a schematic structural view of the water-guiding air-replenishing block of the present invention;

FIG. 5 is a schematic flow chart of the present invention.

The reference numbers in the figures illustrate:

the soil seepage-proof bottom layer 1, the extension type heat conducting rod 2, the drainage fixing net 3, the annular water-intercepting groove 4, the bentonite waterproof blanket 5, the double-optical-surface HDPE geotechnical bottom film 6, the crushed stone layer 7, the expanded perlite heat-insulating layer 8, the water and air supplementing block 9, the heat-gathering block 10, the embedded decomposition block 11, the ventilating pillar pipe 12, the double-state conversion rod 13, the water guide cladding layer 131, the heat-conducting carbon fiber needles 132, the soil seepage-proof edge layer 14, the double-optical-surface HDPE geotechnical edge film 15, the three-dimensional composite geotechnical drainage grid 16, the seepage-proof film bag protective layer 17, the air supplementing pipe 18, the air escape pipe 19, the mortar curtain layer 20, the underground water guide drainage layer 21, the air supplementing micropore.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.