Anti-seepage laying structure for side slope of ash storage yard

Abstract

An ash storage yard side slope anti-seepage laying structure comprises a cleaned and leveled foundation side slope, a clay lining layer laid on the foundation side slope, a composite geomembrane laid on the clay lining layer, a bagged coal ash protection layer laid on the composite geomembrane, and clay filled in gaps of the bagged coal ash protection layer. And an ash residue layer is laid on the bagged coal ash protection layer. The anti-seepage slope protection structure has the advantages that the anti-seepage slope is protected in the form of the bagged coal ash, gaps between the bags are filled and compacted by the clay, and the anti-seepage slope protection structure has the advantages that (1) the anti-seepage slope protection method can meet the requirement of environmental protection and has a strong protection effect on an anti-seepage layer; (2) the bagged fly ash is adopted, so that the use amount of clay is reduced, and the engineering investment is reduced; and (3) the bagged coal ash is used for slope anti-seepage protection, so that the construction is convenient, and the operability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of ash storage yards, and specifically, it is an anti-seepage laying structure for the slope of an ash storage yard. Background Technique

[0002] An ash storage yard refers to a site used to store ash materials generated by coal-fired power plants, which helps to control and manage the environmental impact of fly ash generated by coal-fired power plants. By reasonably designing the anti-seepage project of the ash storage yard, the diffusion of fly ash can be reduced, and the pollution of the surrounding soil and water bodies can be avoided.

[0003] Currently, the anti-seepage laying structure on the slope of the ash storage yard mainly adopts the form of laying two layers of clay above and below the geomembrane for protection, and the edge of the geomembrane is sealed and fixed in the anchorage groove of the anchorage platform with concrete.

[0004] On steeper slopes, in order to prevent damage to the laid composite geomembrane, various machinery cannot be used for the laying of the clay protective layer. Usually, manual paving and compaction with small-scale machines are adopted. The clay protective layer is prone to slipping, the construction is difficult, the cycle is long, and the cost is relatively high. Therefore, how to construct the anti-seepage protective layer on steeper slopes has become a technical difficulty in the anti-seepage system project of the ash yard. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is: aiming at the problems of economy, convenience and operability faced in the anti-seepage construction in the ash storage yard, how to construct the anti-seepage protective layer on steeper slopes. Therefore, a new anti-seepage laying structure for the slope of the ash storage yard is provided.

[0006] The technical solution of the utility model is specifically as follows:

[0007] An anti-seepage laying structure for the slope of an ash storage yard includes a cleaned and leveled basic slope, a clay lining layer is laid on the basic slope, a composite geomembrane is laid on the clay lining layer, a bagged fly ash protective layer is laid on the composite geomembrane, clay is filled in the gaps of the bagged fly ash protective layer, and a cinder layer is laid on the bagged fly ash protective layer.

[0008] The permeability coefficient of the clay lining layer should not be greater than 1.0×10 -7 cm / s, and the thickness should not be less than 75 cm.

[0009] The composite geomembrane adopts a composite geomembrane of high-density polyethylene, and the composite geomembrane of high-density polyethylene includes a first filament geotextile, a thick smooth HDPE geomembrane and a second filament geotextile from bottom to top.

[0010] Both the first filament geotextile and the second filament geotextile are 400 g / m 2 filament geotextile; the thickness of the thick smooth HDPE geomembrane is 1.5 mm.

[0011] The bagged fly ash protection layer includes a number of packaging bags, with fly ash filled in each bag, and the gaps between the bags are filled and tamped with clay.

[0012] The beneficial effects of the present utility model are as follows: from bottom to top, there are a foundation slope, a clay liner, a composite geomembrane, a bagged fly ash protection layer, and a cinder layer. In the form of bagged fly ash, it protects the slope that has been made impervious. The gaps between the bags are filled and tamped with clay, achieving the following beneficial effects: (1) Adopting this slope impervious protection method can meet the requirements of environmental protection and has a strong protective effect on the impervious layer; (2) Using bagged fly ash reduces the amount of clay used and lowers the project investment; (3) Using bagged fly ash for slope impervious protection is convenient for construction and has strong operability; (4) It improves the stability and anti-scouring ability of the slope. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the impervious laying structure of the slope of the ash storage yard;

[0014] Figure 2 It is a partial enlarged view of the impervious laying structure of the slope of the ash storage yard. Specific Embodiments

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0017] As Figure 1 、 Figure 2 shown, an impervious laying structure for the slope of an ash storage yard includes a foundation slope 1 after cleaning and leveling. A clay liner 2 is laid on the foundation slope 1, a composite geomembrane 3 is laid on the clay liner 2, a bagged fly ash protection layer 4 is laid on the composite geomembrane 3, clay 5 is filled in the gaps of the bagged fly ash protection layer 4, and finally, a cinder layer 6 is laid on the bagged fly ash protection layer 4.

[0018] The specific implementation method of the present utility model is as follows:

[0019] First, level the foundation slope 1, and then construct the clay liner 2. According to the "Pollution Control Standard for Storage and Landfill of General Industrial Solid Wastes", the permeability coefficient of the clay liner 2 should not be greater than 1.0×10 -7 cm / s, and the thickness should not be less than 75 cm. The clay liner 2 can be mechanically paved and compacted.

[0020] After the clay liner 2 is laid, lay the composite geomembrane 3. The composite geomembrane 3 is a composite geomembrane made of high-density polyethylene. The composite geomembrane of high-density polyethylene includes a first filament geotextile, a thick smooth-surface HDPE geomembrane, and a second filament geotextile from bottom to top. The overall composite geomembrane 3 should be laid flat to avoid tension, folding, wrinkles, etc. The composite geomembrane 3 should not be exposed to sunlight for a long time, and the upper protective layer should be laid as soon as possible. The open-air time should not exceed 20 days.

[0021] Further, both the first filament geotextile and the second filament geotextile are 400 g / m 2 filament geotextiles; the thickness of the thick smooth-surface HDPE geomembrane is 1.5 mm.

[0022] After the composite geomembrane 3 is laid, lay the bagged fly ash protective layer 4 from the bottom to the top of the slope. The bagged fly ash protective layer 4 includes a number of packaging bags. Fill fly ash in each packaging bag. In each bag, the fly ash should not be filled too full, 80% is appropriate. The gaps between the packaging bags are filled and tamped with clay 5.

[0023] The present utility model is particularly suitable for the laying and protection of the anti-seepage layer of relatively steep slopes of soil and rock, can meet the environmental protection requirements, has a strong protective effect on the anti-seepage layer, is convenient for construction, has strong operability, can greatly reduce the project investment, improve the stability and anti-scouring ability of the slope, and can effectively solve the problems of difficult anti-seepage construction, low efficiency and high cost under the conditions of relatively steep slopes of ash yards.

[0024] The working principle of the present utility model is:

[0025] From bottom to top are the basic slope 1, clay liner 2, composite geomembrane 3, bagged fly ash protection layer 4, and ash slag layer 6. In the form of bagged fly ash, it protects the slope that has been made waterproof. The gaps between the bags are filled and tamped with clay, achieving the following beneficial effects: (1) Adopting this slope waterproof protection method can meet the requirements of environmental protection and has a strong protective effect on the waterproof layer; (2) Using bagged fly ash reduces the consumption of clay and lowers the project investment; (3) Using bagged fly ash for slope waterproof protection is convenient for construction and has strong operability; (4) It improves the stability and anti-scouring ability of the slope.

[0026] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the overall concept of the present invention, several changes and improvements can still be made, and these should also be regarded as the protection scope of the present invention.

Claims

1. An anti-seepage paving structure for the slope of an ash storage yard, characterized in that: The method comprises: cleaning and leveling a foundation slope (1), laying a clay lining layer (2) on the foundation slope (1), laying a composite geomembrane (3) on the clay lining layer (2), laying a bagged fly ash protective layer (4) on the composite geomembrane (3), filling clay (5) in the gaps of the bagged fly ash protective layer (4), and laying an ash slag layer (6) on the bagged fly ash protective layer (4).

2. The anti-seepage paving structure for the slope of an ash storage yard according to claim 1 is characterized in that: The permeability coefficient of the clay lining (2) should not be greater than 1.0×10 -7 cm / s, thickness should not be less than 75cm.

3. The anti-seepage paving structure for the slope of an ash storage yard according to claim 1 is characterized in that: The composite geomembrane (3) adopts a composite geomembrane of high-density polyethylene, and the composite geomembrane of high-density polyethylene includes a first filament geotextile, a thick smooth HDPE geomembrane and a second filament geotextile from bottom to top.

4. The anti-seepage paving structure for the slope of an ash storage yard according to claim 3 is characterized in that: The first filament geotextile and the second filament geotextile are both 400g / m 2 Filament geotextile; The thickness of thick smooth HDPE geomembrane is 1.5mm.

5. The anti-seepage paving structure for the slope of an ash storage yard according to claim 1 is characterized in that: The bagged fly ash protective layer (4) comprises a plurality of packaging bags, each of which is filled with fly ash, and the gaps between the packaging bags are filled and compacted with clay (5).

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