Double-layer HDPE (high-density polyethylene) structure anti-seepage system of red mud storage yard backwater

Abstract

The utility model discloses an anti-seepage system with a double-layer HDPE (high-density polyethylene) structure for a backwater tank of a red mud storage yard, which belongs to the technical field of anti-seepage of water tanks, solves the problem that the backwater tank of the red mud storage yard is easy to leak, and adopts the technical scheme that the anti-seepage system mainly comprises an upper-layer HDPE film, a lower-layer HDPE film and a support structure arranged between the upper-layer HDPE film and the lower-layer HDPE film, and a lower-layer film protection layer is arranged below the lower-layer HDPE film.

Description

Technical Field

[0001] The utility model relates to a double-layer HDPE structure anti-seepage system for a red mud dump return pool, belonging to the technical field of water pool anti-seepage. Background Art

[0002] With the development of the alumina industry, the discharge of red mud has continued to increase, and the number of red mud dumps has also continued to increase. The red mud dump return water pool is an important facility for collecting red mud dump leaching water during the rainy season. The red mud leaching water has a high pH value and heavy metal content. If the anti-seepage measures are not appropriate, it will cause serious pollution to the environment. The anti-seepage performance of the pool is directly related to the protection of the surrounding environment. Since the volume of the red mud dump return water pool ranges from 10,000 to 600,000 m 3 The use of reinforced concrete structure has disadvantages such as large initial investment, long construction period, and high anti-seepage requirements, while the use of a single HDPE membrane for anti-seepage is also susceptible to damage by external forces and prone to leakage. Summary of the Invention

[0003] The utility model provides a double-layer HDPE structure anti-seepage system for a red mud dump return water pool, which solves the problem of easy leakage in the red mud dump return water pool.

[0004] The utility model provides a double-layer HDPE structure anti-seepage system for a red mud dump reclaim pool, comprising an upper HDPE membrane, a lower HDPE membrane and a supporting structure arranged between the upper HDPE membrane and the lower HDPE membrane, wherein the upper HDPE membrane is provided with an upper membrane protective layer, and a lower membrane protective layer is provided under the lower HDPE membrane.

[0005] Furthermore, a bottom plate cushion layer is provided below the lower membrane protection layer, and the bottom plate cushion layer is placed on the bedrock layer.

[0006] Furthermore, the bottom plate cushion layer is a C25 concrete structure with a thickness of 150 to 250 mm.

[0007] Furthermore, a side wall cushion layer is provided below the lower membrane protection layer, and the side wall cushion layer is placed on the water retaining dam.

[0008] Furthermore, the side wall cushion layer is a C30 concrete mesh sprayed structure with a thickness of 75 to 125 mm.

[0009] Furthermore, sandbags are provided on the upper membrane protective layer.

[0010] Adopting the above-mentioned technical solution, the advantages of the present invention are: the structure of the upper and lower HDPE membranes further enhances the anti-seepage performance of the pool; its flexible structure can adapt to pools of various shapes and sizes; the support structure ensures the stability and uniformity of the two HDPE membrane layers, preventing local collapse or wrinkling between the HDPE membrane layers; the lower membrane protective layer enhances the water stability of the lower HDPE membrane with the pool bottom and sidewall structure, and provides a certain degree of protection for the lower HDPE membrane. The upper membrane protective layer protects the upper HDPE membrane from external damage, such as punctures and scratches, thereby extending the service life of the upper HDPE membrane; and due to its simple structure, it also has the advantages of easy construction, strong adaptability, high durability, and low construction cost, making it widely applicable to anti-seepage projects for various types of pools. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the bottom plate structure of the red mud dump return pool;

[0012] Figure 2 This is a schematic diagram of the side wall structure of the red mud dump return pool;

[0013] In the figure: 1-upper HDPE film, 2-lower HDPE film, 3-support structure, 4-upper membrane protective layer, 5-lower membrane protective layer, 6-bottom plate cushion layer, 7-side wall cushion layer, 8-bedrock layer, 9-water retaining dam, 10-sandbag. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0015] In the specification and claims of this utility model, the terms "first," "second," and so on (if any) are used to distinguish similar items, not to describe a specific order or precedence. Even if "second" is used before a technical feature to distinguish it, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. It should be understood that in this utility model, "plurality" refers to two or more items. "And / or" is merely a description of an association between related items, indicating that three possible relationships exist. For example, "X and / or Y" can mean: X exists alone, X and Y exist simultaneously, or Y exists alone. The character " / " generally indicates that the related items are in an "or" relationship. "Including X, Y, and Z" means that all three of X, Y, and Z are included. "Including X, Y, or Z" means that any one of X, Y, or Z is included. "Including X, Y, and / or Z" means that any one, any two, or any three of X, Y, and Z are included. Example

[0016] like Figure 1 As shown, the utility model provides a double-layer HDPE structure anti-seepage system for a red mud dump recirculation pool, comprising an upper HDPE membrane 1, a lower HDPE membrane 2, and a support structure 3 arranged between the upper HDPE membrane 1 and the lower HDPE membrane 2. The upper HDPE membrane 1 is provided with an upper membrane protective layer 4, and a lower membrane protective layer 5 is provided under the lower HDPE membrane 2.

[0017] The utility model further enhances the anti-seepage performance of a water pool through the structure of an upper HDPE film 1 and a lower HDPE film 2. Its flexible structure can adapt to pools of different shapes and sizes. The support structure 3 ensures the stability and uniformity of the two HDPE film layers, preventing local collapse or wrinkles between the HDPE film layers. The lower film protective layer 5 enhances the water stability of the lower HDPE film 2 and the pool bottom and sidewall structure, providing a certain degree of protection for the lower HDPE film 2. The upper film protective layer 4 prevents the upper HDPE film 1 from being damaged by external forces such as punctures and scratches, thereby extending the service life of the upper HDPE film 1. At the same time, due to its simple structure, it also has the advantages of convenient construction, strong adaptability, high durability, and low construction cost, and can be widely used in anti-seepage projects for various types of water pools.

[0018] In this embodiment, a bottom plate cushion layer 6 is further provided below the lower membrane protection layer 5 , and the bottom plate cushion layer 6 is placed on the bedrock layer 8 .

[0019] Among them, in this embodiment, the HDPE film is an environmentally friendly HDPE smooth film or single rough film, the upper film thickness is 2.00 mm, and the lower film thickness is 1.00 mm; the upper film protective layer 4 and the lower film protective layer 5 are filament anti-sticking needle-punched non-woven geotextiles with a nominal strength of 24 N / m; the bottom plate cushion layer 6 is a C25 concrete structure with a thickness of 200 mm, and the supporting structure 3 is a geocomposite drainage net with double-sided filtration function, with a thickness of 6.00 mm.

[0020] Specifically, in this embodiment, sandbags 10 are provided on the upper membrane protection layer 4 , and the interval between the sandbags 10 is 2.0 m. Example

[0021] Different from the first embodiment, Figure 2 As shown, in this embodiment, a side wall cushion layer 7 is provided below the lower membrane protection layer 5, and the side wall cushion layer 7 is placed on the water retaining dam 9. The water retaining dam 9 is a rolled earth-rock dam, and the inner slope of the water retaining dam 9 is 1:2.0, and the compaction coefficient is not less than 0.95.

[0022] The side wall cushion layer 7 is a C30 concrete mesh sprayed structure with a thickness of 75 to 125 mm, and the mesh is a single-layer bidirectional steel mesh.

[0023] In addition to the above-mentioned preferred embodiments, the present invention has other implementation methods. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A double-layer HDPE structure anti-seepage system for a red mud dump recirculation pool, characterized by: The invention comprises an upper HDPE film (1), a lower HDPE film (2), and a support structure (3) arranged between the upper HDPE film (1) and the lower HDPE film (2); the upper HDPE film (1) is provided with an upper film protective layer (4); and the lower HDPE film (2) is provided with a lower film protective layer (5) below.

2. The double-layer HDPE structure anti-seepage system for the red mud dump recirculation pool according to claim 1 is characterized by: A bottom plate cushion layer (6) is further provided below the lower membrane protective layer (5), and the bottom plate cushion layer (6) is placed on the bedrock layer (8).

3. The double-layer HDPE structure anti-seepage system for the red mud dump recirculation pool according to claim 2 is characterized by: The bottom plate cushion layer (6) is a C25 concrete structure with a thickness of 150 to 250 mm.

4. The double-layer HDPE structure anti-seepage system for the red mud dump reclaim pool according to claim 1, characterized in that: A side wall cushion layer (7) is further provided below the lower membrane protection layer (5), and the side wall cushion layer (7) is placed on the water retaining dam (9).

5. The double-layer HDPE structure anti-seepage system for the red mud dump recirculation pool according to claim 4 is characterized by: The side wall cushion layer (7) is a C30 concrete mesh spraying structure with a thickness of 75 to 125 mm.

6. The double-layer HDPE structure anti-seepage system for the red mud dump reclaim pool according to claim 1, characterized in that: A sandbag (10) is provided on the upper membrane protective layer (4).

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