Gas guide immersion irrigation ecological restoration coupling structure for pollution blocking

Abstract

The invention belongs to the technical field of environmental protection engineering, and relates to an air guide immersion irrigation ecological restoration coupling structure capable of being used for blocking pollution, which comprises an immersion irrigation net-shaped water absorption and water retention fiber layer, a reinforced cloth-HDPE (high-density polyethylene) composite blocking layer and a net-shaped air guide layer which are sequentially arranged from top to bottom, and net-shaped water absorption and water retention fibers are fully distributed on the surface layer of the immersion irrigation net-shaped water absorption and water retention fiber layer. Pores of the reticular water-absorbing and water-retaining fibers are filled with fine-grain nutrient soil. The covering and blocking structure is suitable for covering and blocking various pollution sources, the requirement for the slope ratio of a natural slope formed by the pollution sources is not high, meanwhile, the effect of a traditional covering and blocking structure can be achieved through one-time laying of construction, pollution source surface layer pollution blocking, gas guiding and immersion irrigation greening are formed at a time, the construction procedure is simple, meanwhile, the dependence degree of an external greening water source is extremely low, and the environment-friendly effect is achieved. External rainfall is fully absorbed and stored in the immersion irrigation ecological restoration layer, moisture and nutrients required by vegetation growth are fully guaranteed, and surface layer blocking and ecological greening restoration of pollution sources are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection engineering, and in particular to an air-conducting irrigation ecological restoration coupling structure for pollution isolation. Background Art

[0002] Among the types of pollution control, there are organic pollution sites, solid waste dumps, heavy metal pollution sites and even exposed soil dumps. Due to long-term exposure, the leaching solution produced by rainfall seeps into the ground, causing the underground soil and water bodies to be polluted.

[0003] Traditional treatment methods mainly use clay covering or multi-layer structures to reduce the impact of leachate generated by rainwater leaching pollution sources on soil and groundwater. However, the traditional clay covering barrier method is mainly affected by clay quality, performance and material source, and in most cases, the impermeability of clay is far from meeting the permeability coefficient of 1×10 -10 cm / s. At the same time, due to the complexity of pollutants in contaminated sites, most of them are acidic and have extremely high heavy metal content, which directly leads to unsatisfactory ecological restoration effects in the later stage. Another traditional method is multi-layer covering barrier, which isolates the pollution source from the external environment through different functional layers, but the connection and implementation between different structural layers are affected by factors such as the level of on-site technicians, material quality, and construction speed. Sometimes, when one structural layer is completed and the material supply of another structural layer is not timely, it will also affect the progress of the overall barrier implementation. At the same time, the traditional multi-layer covering barrier structure adopts a drainage method for external rainfall, and does not make effective use of rainfall. In order to achieve the effect of ecological restoration in the later stage, it is also necessary to connect a special external irrigation water source, which greatly increases the cost of later maintenance. For the traditional multi-layer covering barrier, its air guide layer often uses a geocomposite drainage net, and the thickness of the geocomposite drainage net is generally 5-8mm. As time goes by after the covering barrier, the geocomposite drainage net will be gradually flattened under the gravity of the top covering structure layer, and slowly lose its air guide function. In the implementation process, it is necessary to lay a separate air guide layer, and then implement the barrier layer and greening layer, and the implementation process is complicated.

[0004] In view of the characteristics of organic pollution sites, solid waste piles, heavy metal pollution sites and even exposed abandoned soil sites, in order to reduce the complexity of construction and reduce the investment in later operation, it is urgent to develop a new structural process that is compatible with barrier, air conduction, irrigation and greening coupling.

[0005] In summary, the existing multi-layer barrier covering process structure cannot simultaneously overcome the following defects:

[0006] (1) The construction is complicated. The traditional multi-layer barrier covering structure is constructed one by one according to the air guide layer, barrier layer, drainage layer, and greening layer. Each process needs to be closely connected, and the construction process is complicated;

[0007] (2) The air conduction effect is poor. The multi-layer barrier covering process structure uses a 5-8 mm geocomposite drainage net for air conduction. However, over time, the geocomposite drainage net will be squeezed under the external force at the top, the thickness will be reduced, and the air conduction ability will be weakened;

[0008] (3) There is a water-conducting layer on the top, which results in poor water retention capacity of the greening layer, and later on, it is necessary to rely on external water sources for greening maintenance.

[0009] (4) The surface layer is generally 500 mm thick planting soil, which is thick and has a high specific gravity. In areas with steep slopes or long slopes, the surface planting soil is prone to landslides or sliding, and requires separate covering construction, which is cumbersome. Summary of the invention

[0010] The purpose of the present invention is to provide an air-conducting irrigation ecological restoration coupling structure for pollution barrier, so as to solve the problems of cumbersome construction of traditional multi-layer barrier covering, difficult greening maintenance, unstable surface greening covering soil, and unclear air-conducting effect.

[0011] In order to achieve the above purpose, the following technical solutions are adopted:

[0012] A gas-conducting immersion irrigation ecological restoration coupling structure for pollution barrier comprises an immersion mesh water-absorbing and water-retaining fiber layer, a reinforced cloth-HDPE composite barrier layer, and a mesh gas-conducting layer which are sequentially arranged from top to bottom.

[0013] The specific structure of the immersion-irrigation mesh water-absorbing and water-retaining fiber layer is as follows: the surface of the immersion-irrigation mesh water-absorbing and water-retaining fiber layer is covered with mesh water-absorbing and water-retaining fibers, and the pores of the mesh water-absorbing and water-retaining fibers are filled with fine-grained nutrient soil.

[0014] Preferably, the mesh water-absorbing and water-retaining fiber layer used in the air-guiding irrigation ecological restoration coupling structure has a thickness of not less than 30 cm. The water-absorbing and water-retaining fiber is sprayed from a mixture of polyester fiber, sodium polyacrylate fiber and plant fiber. The fiber diameter is 50 μm, and it can absorb 100 times its own weight in water within 20 seconds. The limiting oxygen index (LOI) is 30%, and it has good flame retardancy and a high environmental safety risk factor. The internal porosity of the mesh water-absorbing and water-retaining fiber layer is 35%, and the capillary porosity between the fibers is 60%. The sufficiently large porosity provides sufficient accommodation space for the fine-grained nutrient soil required for vegetation restoration.

[0015] Preferably, the fine-grained nutrient soil is prepared with clay soil, carbonized rice husk powder, ground straw and organic fertilizer in a mass ratio of 6:1:2:1. The clay soil particle fineness is about 0.2-0.5 cm, the rice husk carbonized powder particle fineness is about 0.1-0.3 cm, and the ground straw particle fineness is 1.0-2.0 cm.

[0016] The mesh water-absorbing and water-retaining fiber layer is irrigated. Through the strong water absorption capacity and sufficient space for storing nutrient soil of the mesh water-absorbing and water-retaining fiber layer, it can fully store external rainfall and nutrient soil, and provide sufficient water and soil nutrition for the later vegetation growth.

[0017] Preferably, the specific structure of the reinforced cloth-HDPE composite barrier layer is: the reinforced cloth-HDPE composite barrier layer is composed of a HDPE membrane and a reinforced cloth woven from polyester / polypropylene fibers, which are tightly fitted together, and the polyester / polypropylene fiber reinforced cloth is flatly and tightly arranged on both sides of the HDPE membrane.

[0018] Preferably, the thickness of the HDPE membrane can be determined according to the needs, and the thicknesses are 1.0 mm, 1.5 mm, and 2.0 mm respectively. The thickness of the polyester / polypropylene fiber reinforced fabric is 0.3 cm. The permeability coefficient of the reinforced fabric-HDPE composite barrier layer can reach 1×10 -10 cm / s, the tensile strength of polyester / polypropylene fiber reinforced cloth is 60KN / m, which can meet the overall tensile strength between platforms with a vertical height difference of 10m.

[0019] Preferably, the mesh air guide layer is tightly coupled to the lower side of the reinforcement fabric-HDPE composite barrier layer in the laying direction, the mesh air guide layer is in direct contact with the surface layer of the pollution source, and the mesh air guide layer is woven from polyester / polypropylene fibers.

[0020] Preferably, the microstructure of the pore units inside the mesh air-conducting layer is a regular tetrahedral structure, i.e., tetrahedral mesh air-conducting pores, and the contact surface between the mesh air-conducting layer and the pollution source is wavy, i.e., a wavy structure, and the height difference between the wave peak and the wave valley is 2 cm.

[0021] Preferably, the mesh air guide layer is 10 cm thick, the fibers are irregularly and disorderly arranged, the fiber diameter is 0.6-1 mm, the porosity is 70%, the compressive strength is 100 kpa and the compression deformation is 0.2, which can play the role of buffering and protecting the reinforced cloth-HDPE composite barrier layer. At the same time, the wavy shape between the mesh air guide layer and the contact surface between the pollution source can ensure the stable laying of the air-guiding irrigation ecological restoration coupling structure, and can smoothly ensure the drainage of the overflow gas from the bottom pollution source.

[0022] The above-mentioned impregnated mesh water-absorbing and water-retaining fiber layer, reinforced cloth-HDPE composite barrier layer, and mesh air-conducting layer of the technical solution are interconnected and coupled to form a whole, which can be naturally rolled up and stored during storage and transportation, and can be laid as a whole during construction, with a single width of 6m.

[0023] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0024] (1) The present invention overcomes the cumbersome construction process and solves the problem that the traditional multi-layer barrier covering structure is constructed one by one according to the air guide layer, barrier layer, drainage layer, and greening layer, and each process needs to be closely connected and the construction process is cumbersome, and the molding process is realized one process at a time;

[0025] (2) The present invention improves the efficiency of exhausting gases from inside and outside the pollution source. Compared with the traditional multi-layer barrier covering process structure, which uses a 5-8mm geocomposite drainage net for air conduction, the geocomposite drainage net will be squeezed under the external force at the top over time, and the thickness will be reduced, and the air conduction ability will be weakened. The present invention adopts a wavy air conduction layer with a thickness of 10cm and a porosity of 70%, which improves the air conduction rate, compressive strength of 100kpa and compression deformation of 0.2, which can buffer the damage of the pollution source to the core pollution barrier layer and resist deformation caused by external pressure;

[0026] (3) The unique water absorption and storage function of the present invention can realize the storage and utilization of external rainfall, increase the survival rate of vegetation, and reduce the dependence on later vegetation maintenance;

[0027] (4) The structure of traditional covering barriers generally has a surface layer of 500 mm thick planting soil, which is thick and has a high specific gravity. In areas with steep slopes or long slopes, the surface planting soil is prone to landslides or sliding, and separate covering construction is required, which is cumbersome. The unique fine-grained nutrient soil of the present invention is fully filled and fused with the irrigation mesh water-absorbing and water-retaining fiber layer to form a whole. The fine-grained nutrient soil has its own rich organic nutrient elements, combined with the irrigation structure, to overcome the problems of traditional covering barriers for vegetation restoration, which require multiple constructions, rely on post-maintenance and have unsatisfactory results.

[0028] (5) The air-conducting irrigation and ecological restoration coupling structure that can be used for pollution barrier of the present invention is mainly aimed at the barrier coverage and vegetation restoration of various types of pollution sources. Its advantages are more obvious for environmental protection engineering projects with high requirements for the surrounding environment and complex construction conditions. At the same time, it has more obvious advantages in the ecological protection and pollution barrier control of waste slag piles and other polluted solid wastes.

[0029] The present invention is suitable for covering and blocking various types of pollution sources, and has low requirements on the slope ratio of the natural slope formed by the pollution source. At the same time, the effect of the traditional covering barrier structure can be achieved after one-time construction and laying. The surface pollution barrier, air conduction, and irrigation greening of the pollution source are formed in one step, and the construction process is simple. At the same time, the degree of dependence on external greening water sources is extremely low, and the external rainfall is fully absorbed and stored in the irrigation ecological restoration layer, which fully guarantees the water and nutrients required for vegetation growth, thereby realizing surface barrier of pollution sources and ecological greening restoration. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic plan view of an embodiment of the present invention;

[0032] Figure 2 A construction schematic diagram provided in one embodiment of the present invention;

[0033] Figure 3 A schematic diagram of water-absorbing and water-retaining fiber pores in a local structure of a water-absorbing and water-retaining mesh fiber layer provided in one embodiment of the present invention;

[0034] Figure 4 A schematic diagram of a local structure of a reinforced fabric-HDPE composite barrier layer provided in one embodiment of the present invention;

[0035] Figure 5 A schematic diagram of the fusion of fine-grained nutrient soil and a soaking mesh water-absorbing and water-retaining fiber layer provided in one embodiment of the present invention;

[0036] Figure 6 For invention 一 Schematic diagram of the mesh air guide layer provided in the embodiment;

[0037] The numbers in the figure are: 1-surface layer of pollution source; 2-mesh air-conducting layer; 3-reinforced cloth-HDPE composite barrier layer; 4-irrigated mesh water-absorbing and water-retaining fiber layer; 5-fine-grained nutrient soil; 6-water-absorbing and water-retaining fiber pores; 7-reinforced cloth; 8-HDPE membrane; 9-wavy structure; 10-tetrahedral mesh air-conducting pores. DETAILED DESCRIPTION

[0038] The embodiments of the present invention will be described in detail below in conjunction with the examples, but those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific conditions are specified in the examples, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the materials used do not specify the manufacturer, they are all conventional products that can be purchased commercially.

[0039] The following is a detailed description of an air-conducting irrigation ecological restoration coupling structure that can be used for pollution barrier according to an embodiment of the present invention.

[0040] As attached Figures 1 to 6As shown, a pollution barrier air-conducting immersion irrigation ecological restoration coupling structure, the surface of the pollution barrier air-conducting immersion irrigation ecological composite structure is covered with immersion mesh water-absorbing and water-retaining fibers 4, as shown in the attached Figure 3 , 5 The pores 6 of the irrigated mesh water-absorbing and water-retaining fibers are filled with fine-grained nutrient soil 5, with a reinforced cloth-HDPE composite barrier layer 3 in the middle, and a mesh air-conducting layer 2 under the reinforced cloth-HDPE composite barrier layer 3. The surface of the mesh air-conducting layer 2 is wavy. The water-absorbing and water-retaining fiber layer 4, the reinforced cloth-HDPE composite barrier layer 3, and the mesh air-conducting layer 2 are sequentially connected to each other from top to bottom and coupled to form a whole. They can be naturally rolled up and stored during storage and transportation, and can be laid as a whole during construction. The single width is 6m.

[0041] In the embodiments of the present invention, the targets are organic pollution sites, solid waste dumps, heavy metal pollution sites and even exposed soil dumps, which are pollution sources caused by long-term exposure, leachate generated by rainfall leaching, infiltrating into the ground, causing underground soil and water bodies to be polluted.

[0042] In the embodiment of the present invention, the surface of the pollution source is leveled and cleaned, and the surface height difference is ±2 cm, and finally the surface slope is formed to be no greater than 1:1.

[0043] As attached Figure 6 As shown, a mesh air conducting layer 2 is made, the surface of the mesh air conducting layer is wavy, i.e., a wavy structure 9, the height difference between the wave peak and the wave valley is 2 cm, the mesh air conducting layer 2 is 10 cm thick, and the mesh air conducting layer 2 is woven from polyester / polypropylene fibers, and the internal pore unit microstructure is a regular tetrahedral structure, i.e., tetrahedral mesh air conducting pores 10, the fiber diameter is 0.6-1 mm, the porosity is 70%, the compressive strength is 100 kPa and the compression deformation is 0.2, which can increase the air conductivity and vertical deformation resistance.

[0044] As attached Figure 4 As shown, in the embodiment of the present invention, the coupling of the reinforced cloth and the HDPE membrane 8 is made, the reinforced cloth is woven from polyester / polypropylene fibers, the polyester / polypropylene fiber reinforced cloth 7 is flat and tightly arranged on both sides of the HDPE membrane, the thickness of the HDPE membrane 8 can be determined according to needs, the thickness is 1.0mm, 1.5mm, 2.0mm respectively, the thickness of the polyester / polypropylene fiber reinforced cloth 7 is 0.3cm, and the permeability coefficient of the reinforced cloth-HDPE composite barrier layer 3 can reach 1×10 -10 cm / s, the tensile strength of polyester / polypropylene fiber reinforced cloth 7 is 60KN / m, which can meet the overall tensile strength between platforms with a vertical height difference of 10m.

[0045] In the embodiment of the present invention, the water-absorbing and water-retaining fiber layer 4 is made of an impregnated mesh, and the thickness is not less than 30 cm. The water-absorbing and water-retaining fiber is sprayed by mixing polyester fiber, sodium polyacrylate fiber and plant fiber, and the fiber diameter is 50 μm. It can absorb 100 times its own weight of water within 20 seconds, and the limiting oxygen index (LOI) is 30%. It has good flame retardancy and a high environmental safety risk factor; Figure 3 As shown, the internal porosity of the fibers in the mesh water-absorbing and water-retaining fiber layer is 35%, and the capillary porosity between the fibers is 60%. The sufficiently large porosity provides sufficient accommodation space for the fine-grained nutrient soil required for vegetation restoration.

[0046] In the embodiment of the present invention, Figure 5 As shown, the fine-grained nutrient soil is made of clay soil, rice husk carbonized powder, straw grind and organic fertilizer in a mass ratio of 6:1:2:1. The particle fineness of the clay soil is about 0.2-0.5cm, the particle fineness of the rice husk carbonized powder is about 0.1-0.3cm, and the particle fineness of the straw grind is 1.0-2.0cm, providing rich organic nutrition for vegetation growth.

[0047] In an embodiment of the present invention, after the surface of the pollution source is leveled, the pollution barrier air-conducting irrigation ecological restoration coupling material that has been prepared and coupled as one is laid as a whole to achieve pollution source isolation and vegetation restoration.

[0048] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0049] The air guide part includes a mesh air guide layer 2; a wavy structure 9 on the surface of the mesh air guide layer; and tetrahedral mesh air guide pores 10. Specifically, after the surface layer 1 of the pollution source is cleaned and leveled, a mesh air guide layer 2 having an internal pore unit microstructure of a regular tetrahedron is formed by weaving polyester / polypropylene fibers, and then the mesh air guide layer 2 is integrated with the reinforced cloth on one side of the composite structure of the reinforced cloth and the HDPE membrane.

[0050] The barrier part includes a reinforced cloth-HDPE composite barrier layer 3, a reinforced cloth 7, and a HDPE membrane 8. Specifically, the reinforced cloth 7 woven from polyester / polypropylene fibers is tightly arranged on both sides of the HDPE membrane 8 to enhance the overall tensile strength of the barrier layer.

[0051] Vegetation restoration part: including an irrigated mesh water-absorbing and water-retaining fiber layer 4; fine-grained nutrient soil 5; water-absorbing and water-retaining fiber pores 6; the irrigated mesh water-absorbing and water-retaining fiber layer 4 is sprayed by mixing polyester fiber, sodium polyacrylate fiber and plant fiber, with a thickness of not less than 30 cm, the irrigated mesh water-absorbing and water-retaining fiber layer 4 is arranged on the reinforced cloth-HDPE composite barrier layer 3 and formed into a whole, and then the irrigated mesh water-absorbing and water-retaining fiber layer 4 is vibrated and filled with the compounded fine-grained nutrient soil 5, and finally the air conduction part, the barrier part and the vegetation restoration part are coupled to form a whole, so as to achieve the effect of blocking the pollution source while taking into account the air conduction, storing external rainfall, vegetation irrigating and restoration.

[0052] Implementation process: The above three parts are coupled to form an air-conducting irrigation ecological restoration mat, and then the surface of the pollution source is leveled, shaped, and anchor trenches are excavated. The air-conducting irrigation ecological restoration mat formed by coupling is laid on the surface of the pollution source in one step, ultimately achieving coverage and isolation of the pollution source and restoration of vegetation.

[0053] Unless otherwise specified, the percentages described in the present invention are all mass percentages, and the ratios described are all mass ratios.

[0054] To sum up, the embodiment of the present invention provides an air-conducting and immersion-irrigation ecological restoration coupling structure that can be used for pollution barrier, which can solve the problem of long-term exposure of polluted sites such as organic pollution sites, solid waste piles, heavy metal pollution sites and even exposed abandoned soil sites, and the leachate produced by rainfall seeping into the ground, causing underground soil and water bodies to be polluted. It mainly solves the problem of complicated construction process, low air-conducting efficiency, and the need for fertilization and irrigation maintenance during vegetation restoration during the process of covering and blocking pollution sources. The implementation of this invention provides more convenient new materials, new technologies and new processes for the barrier covering of some special pollution sites.

[0055] The implementation cases described above are some embodiments of the present invention, rather than all embodiments. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A gas-conducting irrigation ecological restoration coupling structure for pollution isolation, characterized by: The invention comprises an irrigated mesh water-absorbing and water-retaining fiber layer (4), a reinforced fabric-HDPE composite barrier layer (3), and a mesh air-conducting layer (2) which are arranged in sequence from top to bottom. The surface of the irrigated mesh water-absorbing and water-retaining fiber layer (4) is covered with mesh water-absorbing and water-retaining fibers, and the pores (6) of the mesh water-absorbing and water-retaining fibers are filled with fine-grained nutrient soil (5).

2. A gas-conducting irrigation ecological restoration coupling structure for pollution isolation, characterized by: The reinforced fabric-HDPE composite barrier layer (3) is composed of a HDPE film (8) and polyester / polypropylene fiber reinforced fabrics (7) tightly fitted on both sides of the HDPE film (8).

3. The air-conducting irrigation ecological restoration coupling structure for pollution isolation according to claim 1 is characterized by: The mesh air guide layer (2) is coupled to the lower side of the reinforced fabric-HDPE composite barrier layer (3) in the laying direction, the mesh air guide layer (2) is in direct contact with the surface layer (1) of the pollution source, and the mesh air guide layer (2) is woven from polyester / polypropylene fibers.

4. The air-conducting irrigation ecological restoration coupling structure for pollution isolation according to claim 3 is characterized by: The microstructure of the internal pore units of the mesh air-conducting layer (2) is a regular tetrahedral structure, i.e., tetrahedral mesh air-conducting pores (10); the contact surface between the mesh air-conducting layer (2) and the pollution source surface layer (1) is wavy, i.e., a wavy structure (9); and the height difference between the wave peak and the wave valley is 2 cm.

5. The air-conducting irrigation ecological restoration coupling structure for pollution isolation according to claim 3 or 4, characterized in that: The mesh air-conducting layer (2) has a thickness of 10 cm, and the polyester / polypropylene fibers are irregularly and disorderly arranged. The fiber diameter is 0.6-1 mm, the porosity is 70%, the compressive strength is 100 kPa, and the compression deformation is 0.

2.

6. The air-conducting irrigation ecological restoration coupling structure for pollution isolation according to claim 1 is characterized by: The thickness of the impregnated mesh water-absorbing and water-retaining fiber layer (4) is not less than 30 cm. The water-absorbing and water-retaining fibers are sprayed from a mixture of polyester fibers, sodium polyacrylate fibers and plant fibers. The fiber diameter is 50 μm, the limiting oxygen index is 30%, the internal porosity of the fibers of the mesh water-absorbing and water-retaining fiber layer is 35%, and the capillary porosity between the fibers is 60%.

7. The air-conducting irrigation ecological restoration coupling structure for pollution isolation according to claim 1 or 6, characterized in that: The fine-grained nutrient soil (5) is prepared from clay soil, carbonized rice husk powder, ground straw, and organic fertilizer in a mass ratio of 6:1:2:

1. The particle fineness of the clay soil is about 0.2-0.5 cm, the particle fineness of the carbonized rice husk powder is about 0.1-0.3 cm, and the particle fineness of the ground straw is 1.0-2.0 cm.

8. The air-conducting irrigation ecological restoration coupling structure for pollution isolation according to claim 2 is characterized by: The thicknesses of the HDPE membrane (8) are 1.0 mm, 1.5 mm, and 2.0 mm, respectively, and the thickness of the polyester / polypropylene fiber reinforced fabric (7) is 0.3 cm.

9. The air-conducting irrigation ecological restoration coupling structure for pollution isolation according to claim 2 or 8, characterized in that: The permeability coefficient of the reinforced fabric-HDPE composite barrier layer (3) is less than or equal to 1×10 -10 cm / s, the tensile strength of the polyester / polypropylene fiber reinforced fabric (7) is 60KN / m, which can meet the overall tensile strength between platforms with a vertical height difference of 10m.

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