CN214401902U - Seepage-proofing mechanism for retrievable unit of rigid hazardous waste landfill - Google Patents

Abstract

The utility model discloses an anti-seepage mechanism for a retrievable unit of a rigid hazardous waste landfill, which comprises a vertical surface anti-seepage structure and a bottom anti-seepage structure; the vertical anti-seepage structure comprises a vertical reinforced concrete layer, a first HDPE geomembrane layer and a first protective layer which are sequentially arranged from outside to inside; the bottom seepage-proofing structure comprises a reinforced concrete bottom plate layer, a second protective layer, a second HDPE geomembrane layer, a third protective layer and a percolate diversion layer which are sequentially arranged from bottom to top; first HDPE geomembrane layer bottom is connected with second HDPE geomembrane layer, first protective layer bottom and third protective layer formula structure as an organic whole. The utility model discloses effectively strengthen geotechnological cloth protective layer and to the acid-base resistance of landfill thing, continue landfill service function, reduce the maintenance cost, avoided the seepage of high polluted medium and the environmental protection and the safety problem that cause.

Description

Seepage-proofing mechanism for retrievable unit of rigid hazardous waste landfill

Technical Field

The utility model relates to a dangerous waste landfill can retrieve the seepage prevention mechanism of unit, concretely relates to a be used for useless landfill of rigidity danger to retrieve the seepage prevention mechanism of unit.

Background

With the rapid development of social economy, the development of urbanization and industrialization is accelerated, and the formation of dangerous waste in industrial production is continuously increased. And aiming at the wastes with water-soluble salt more than 10 percent or organic matter content more than 5 percent, the wastes need to enter a rigid dangerous waste landfill, part of dangerous wastes with relatively simple components contain reusable elements, and the related dangerous wastes can be recycled for re-refining when the refining technology is improved, and a conventional anti-seepage system of the landfill is easy to damage in the recycling process to generate the environmental pollution risk.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists among the prior art, the utility model provides a prevention of seepage mechanism that is used for useless landfill site of rigidity to retrieve unit.

The utility model discloses an anti-seepage mechanism for a retrievable unit of a rigid hazardous waste landfill, which comprises a vertical surface anti-seepage structure and a bottom anti-seepage structure;

the vertical face seepage-proofing structure comprises a vertical face reinforced concrete layer, a first HDPE geomembrane layer and a first protective layer which are sequentially arranged from outside to inside;

the bottom anti-seepage structure comprises a reinforced concrete bottom plate layer, a second protective layer, a second HDPE geomembrane layer, a third protective layer and a percolate diversion layer which are sequentially arranged from bottom to top;

the bottom of the first HDPE geomembrane layer is connected with the second HDPE geomembrane layer, and the bottom of the first protective layer and the third protective layer are of an integrated structure.

As a further improvement of the utility model, the first HDPE geomembrane layer is an HDPE geomembrane with nails, the studs of the HDPE geomembrane with nails are embedded in the vertical face reinforced concrete layer, and the smooth surface of the HDPE geomembrane with nails faces the inside of the cell;

the HDPE area is followed closely smooth surface of geomembrane and is covered with first protective layer.

As a further improvement, the stud height of HDPE area nail geomembrane is not less than 1cm, and thickness is not less than 3mm except that the stud, and 1180/m is no less than to the density that sets up of stud²；

The pull-out strength of the embedded nail after being combined with the vertical face reinforced concrete layer is not less than 500 kpa.

As a further improvement, the second protective layer is fully distributed above the reinforced concrete bottom plate layer, and the second HDPE geomembrane layer covers the second protective layer.

As a further improvement of the utility model, the second HDPE geomembrane layer is a HDPE smooth geomembrane, and the HDPE smooth geomembrane is fixedly connected with the bottom of the first HDPE geomembrane layer;

the thickness of the HDPE geomembrane is not less than 2 mm.

As a further improvement of the utility model, the first protective layer, the second protective layer and the third protective layer are all filament non-woven geotextiles;

as a further improvement of the utility model, the percolate guiding layer comprises a filament non-woven geotextile, a composite geotechnical drainage net and a filament non-woven geotextile which are sequentially arranged from top to bottom, and the specification of the composite geotechnical drainage net is not less than 7 mm;

the filament non-woven geotextile is respectively provided with the specification of not less than 800g/m²Made of polypropylene material.

Compared with the prior art, the beneficial effects of the utility model are that:

the vertical face seepage-proofing structure and the bottom seepage-proofing structure of the utility model effectively enhance the resistance of the geotextile protective layer to acid and alkali of the landfill by arranging multilayer protection, ensure the process of retrieving the landfill, do not damage the HDPE geomembrane, continue the use function of the landfill, reduce the maintenance cost, and avoid the environmental protection and safety problems caused by the leakage of highly polluted media;

the utility model discloses a setting up of HDPE geomembrane has good environmental stress cracking resistance ability, anti low temperature, ageing resistance, corrosion resisting property to and great service temperature scope, can effectively reduce the seepage of high contaminated medium, improved seepage prevention structure's life.

Drawings

Fig. 1 is a schematic overall structure diagram of an anti-seepage mechanism for a retrievable unit of a rigid hazardous waste landfill disclosed by the utility model;

fig. 2 is a schematic view of a vertical anti-seepage structure for a retrievable unit of a rigid hazardous waste landfill disclosed by the utility model;

fig. 3 is the utility model discloses a bottom seepage prevention structure sketch map that is used for useless landfill site of rigidity danger to retrieve unit.

In the figure:

1. the unit cell can be retrieved; 2. a facade seepage-proofing structure; 2-1, a vertical face reinforced concrete layer; 2-2, HDPE geomembrane with nails; 2-3, a first protective layer; 3. a bottom impermeable structure; 3-1, a reinforced concrete floor layer; 3-2, a second protective layer; 3-3, HDPE smooth geomembrane; 3-4, a third protective layer; 3-5, and a percolate flow guiding layer.

Detailed Description

In order to make the objects, 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 with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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 also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1-2, the utility model discloses an anti-seepage mechanism for a retrievable unit of a rigid hazardous waste landfill, which comprises a vertical anti-seepage structure 2 and a bottom anti-seepage structure 3; the vertical anti-seepage structure 2 comprises a vertical reinforced concrete layer 2-1, a first HDPE geomembrane layer and a first protective layer 2-3 which are sequentially arranged from outside to inside; the bottom anti-seepage structure 3 comprises a reinforced concrete bottom plate layer 3-1, a second protective layer 3-2, a second HDPE geomembrane layer, a third protective layer 3-4 and a percolate diversion layer 3-5 which are sequentially arranged from bottom to top; the bottom of the first HDPE geomembrane layer is connected with the second HDPE geomembrane layer, and the bottom of the first protective layer 2-3 and the third protective layer 3-4 are of an integrated structure; specifically, the method comprises the following steps:

as shown in figure 2, the utility model discloses a first HDPE geomembrane layer is HDPE area nail geomembrane 2-2, and HDPE area nail geomembrane 2-2 one side is smooth, and the one side is equipped with the stud, and wherein HDPE area nail geomembrane 2-2's stud height is not less than 1cm, the utility model discloses the preferred 1cm of stud height, HDPE area nail geomembrane 2-2 are except that the stud, and thickness is not less than 3mm, the utility model discloses HDPE area nail geomembrane 2-2 is apart from the preferred 3mm of outer thickness of stud, and the density of arranging of stud is not less than 1180/m²The arrangement density of the studs of the utility model is preferably 1180/m²The HDPE geomembrane 2-2 is provided with an embedded nail surface facing to the vertical face reinforced concrete layer 2-1, the embedded nail is embedded and fixed in the vertical face reinforced concrete layer 2-1 of the recoverable unit cell 1, and the pull-out strength is more than or equal to 500kpa after the embedded nail is combined with the vertical face reinforced concrete layer 2-1.

Further, the utility model discloses a smooth surface of HDPE area nail geomembrane 2-2 is towards in the cell, and is covered with first protective layer 2-3 on the smooth surface of HDPE area nail geomembrane 2-2, the utility model discloses the filament non-woven geotechnological cloth of the preferred polypropylene material of first protective layer 2-3, the unit area quality of filament non-woven geotechnological cloth is not less than 800g/m²The utility model preferably selects 800g/m²The arrangement of the filament non-woven geotextile reduces the collision of a landfill site and a landfill machine on the HDPE geomembrane 2-2 with the nails, and prolongs the service life of the HDPE geomembrane 2-2 with the nails.

As shown in figure 3, the utility model discloses a second protective layer 3-2 is full cloth above reinforced concrete floor layer 3-1, and second HDPE geomembrane layer is arranged in on second protective layer 3-2, takes nail geomembrane 2-2 bottom fixed connection with the HDPE, the utility model discloses the preferred welding of fixed connection makes second HDPE soilThe working film layer and the HDPE geomembrane 2-2 with the nails form a whole body to ensure that pollutants do not leak. The third protective layer 3-4 covers on the second HDPE geomembrane layer, and is fully distributed at the bottom of the retrievable unit cell 1, and is of an integrated structure with the bottom of the first protective layer 2-3, the connection sealing performance of the first protective layer 2-3 and the second protective layer 3-4 is increased, the utility model discloses a second protective layer 3-2 and the third protective layer 3-4 are filament non-woven geotextiles made of polypropylene materials, and the unit area mass of the filament non-woven geotextiles is not less than 800g/m²The utility model preferably selects 800g/m²When the HDPE geotechnical film is actually laid, the first protective layer 2-3 and the third protective layer 3-4 can adopt complete filament non-woven geotextile for laying, the integrity of the first protective layer 2-3 and the third protective layer 3-4 is increased, the polypropylene filament non-woven geotextile is used as the protective layer, the acid and alkali resistance of the polypropylene material is fully utilized, the protective capability of the HDPE geotechnical film is improved, and the service life of the HDPE geotechnical film is prolonged.

Further, the utility model discloses a second HDPE geomembrane layer is HDPE plain noodles geomembrane 3-3, and HDPE plain noodles geomembrane 3-3 is arranged in on the second protective layer 3-2, and full cloth in can retrieving unit cell 1 bottom, and the thickness of HDPE plain noodles geomembrane is not less than 2mm, the utility model discloses preferred 2mm of thickness of HDPE plain noodles geomembrane 3-3, four sides and HDPE plain noodles geomembrane 2-2 bottom fixed connection of nail geomembrane are taken to HDPE simultaneously, form an overall structure, the utility model discloses the preferred welding of fixed connection, HDPE plain noodles geomembrane 3-3 and HDPE are taken nail geomembrane 2-2 fixed connection, have guaranteed the leakproofness of retrieving unit cell 1 inner geomembrane structure, have avoided the seepage of high contaminated medium.

Furthermore, the utility model discloses a long filament non-woven geotechnical cloth, compound geotechnological drainage network and long filament non-woven geotechnological cloth that percolate diversion layer 3-5 set gradually from top to bottom, wherein the specification of compound geotechnological drainage network is not less than 7mm, the utility model discloses preferred 7 mm; the filament non-woven geotextiles of the upper layer and the lower layer are both made of polypropylene materials, and the mass per unit area is not less than 800g/m²The utility model preferably selects 800g/m²。

The utility model discloses a construction method:

firstly, enabling an embedded nail surface of a HDPE (high-density polyethylene) geomembrane 2-2 with nails to face a vertical face reinforced concrete layer 2-1 of a retrievable unit cell 1, embedding the embedded nail in the vertical face reinforced concrete layer 2-1, ensuring that the pull-out strength is more than or equal to 500kpa after the embedded nail is combined with the vertical face reinforced concrete layer 1, and enabling a smooth surface of the HDPE geomembrane 2-2 with nails to face into the retrievable unit cell;

step two, paving a second protective layer 3-2 on the reinforced concrete floor layer 3-1 with the retrievable unit cells 1, namely the mass per unit area is 800g/m²The polypropylene filament non-woven geotextile is fully distributed on the reinforced concrete bottom plate layer 3-1;

thirdly, laying 3-3 parts of HDPE smooth geomembrane on the filament non-woven geotextile made of the first layer of polypropylene material, wherein the thickness of the HDPE smooth geomembrane 3-3 is 2mm, and the HDPE smooth geomembrane 3-3 is required to be fully distributed on the filament non-woven geotextile;

fourthly, the bottom of the HDPE geomembrane with the nails 2-2 is connected with the four sides of the HDPE smooth geomembrane 3-3 into a whole in a welding mode, so that the sealing performance of the geomembrane is ensured;

step five, covering the smooth surface side of the HDPE geomembrane 2-2 with the nails and the upper part of the HDPE smooth surface geomembrane 3-3 with the mass per unit area of 800g/m²The first protective layer 2-3 and the third protective layer 3-4 are formed by the filament non-woven geotextile made of polypropylene material;

step six, paving a percolate flow guiding layer 3-5 above the third protective layer 3-4; the laying of the bottom impermeable structure 3 is completed.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An anti-seepage mechanism for a retrievable unit of a rigid hazardous waste landfill site is characterized by comprising a vertical-face anti-seepage structure and a bottom anti-seepage structure;

the vertical face seepage-proofing structure comprises a vertical face reinforced concrete layer, a first HDPE geomembrane layer and a first protective layer which are sequentially arranged from outside to inside;

the bottom anti-seepage structure comprises a reinforced concrete bottom plate layer, a second protective layer, a second HDPE geomembrane layer, a third protective layer and a percolate diversion layer which are sequentially arranged from bottom to top;

the bottom of the first HDPE geomembrane layer is connected with the second HDPE geomembrane layer, and the bottom of the first protective layer and the third protective layer are of an integrated structure.

2. The seepage control mechanism of claim 1, wherein the first HDPE geomembrane layer is an HDPE nailing geomembrane, the studs of the HDPE nailing geomembrane are embedded in the vertical face reinforced concrete layer, and the smooth face of the HDPE nailing geomembrane faces the inside of the cell;

the HDPE area is followed closely smooth surface of geomembrane and is covered with first protective layer.

3. The seepage prevention mechanism of claim 2, wherein the stud height of the HDPE nailing geomembrane is not less than 1cm, the thickness except the stud is not less than 3mm, and the arrangement density of the studs is not less than 1180 studs/m²；

The pull-out strength of the embedded nail after being combined with the vertical face reinforced concrete layer is not less than 500 kpa.

4. The barrier mechanism of claim 1, wherein the second protective layer is interspersed over the reinforced concrete floor layer, and wherein the second HDPE geomembrane layer overlies the second protective layer.

5. The seepage control mechanism of claim 4, wherein the second HDPE geomembrane layer is an HDPE smooth geomembrane, and the HDPE smooth geomembrane is fixedly connected with the bottom of the first HDPE geomembrane layer;

the thickness of the HDPE smooth geomembrane is not less than 2 mm.

6. The barrier mechanism of claim 5, wherein the first, second, and third covers are all filament non-woven geotextiles.

7. The seepage prevention mechanism according to claim 6, wherein the percolate guiding layer comprises a filament non-woven geotextile, a composite geotechnical drainage net and a filament non-woven geotextile which are arranged from top to bottom in sequence, and the specification of the composite geotechnical drainage net is not less than 7 mm;

the filament non-woven geotextile is respectively provided with the specification of not less than 800g/m²Made of polypropylene material.

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