Self-repairing capsule for impermeable layer of refuse landfill and anti-seepage method

Self-repairing capsule and anti-leakage method of landfill anti-seepage layer Technical field

[0001] The present invention relates to the technical field of solid waste treatment, in particular to a self-repairing capsule and an anti-leakage method for an anti-seepage layer in a landfill.

Background technique

Because the disaster that landfill has occurred at present is mainly leachate seepage, and pollution is very large, so at the beginning of landfill construction, anti-seepage design is extremely important, how to process and stop leakage in time after leakage occurs simultaneously is also critical important. At present, the anti-seepage layer is mainly composed of waterproof membrane and natural soil layer, and at the same time, leak holes are set to monitor the leakage.

However, due to the concealment of leakage, when leakage is often found to occur, great pollution has been caused, and it is difficult to block. In particular, for the central position of the bottom of the landfill, the location is relatively deep, and the overlying landfill is difficult to support heavy grouting equipment, so the plugging treatment is not easy.

Contents of the invention

In view of the above-mentioned shortcoming of the prior art, the technical problem to be solved in the present invention is to provide a kind of self-repairing capsule and anti-leakage method of landfill anti-seepage layer, can infiltrate landfill when leachate When the anti-seepage layer is used, it triggers the formation of foaming materials to fill the gap between the two layers of anti-seepage membranes, optimizes and repairs the anti-seepage structure of the anti-seepage layer of the landfill, and solves the problem of landfill leakage that is not found in time The problem of pollution is easy to solve the problem that it is difficult to perform grouting repair at the bottom of the landfill, and it is more conducive to the protection of the ecological environment.

In order to solve the problems of the technologies described above, the invention provides a kind of self-repairing capsule of landfill anti-seepage layer, comprising: a capsule shell, the inside of the capsule shell has a foaming reaction chamber, and the capsule shell is provided with a foaming reaction cavity A through-hole structure that communicates with the cavities; a foaming assembly that can produce foaming materials, the foaming assembly is accommodated in the foaming reaction chamber, the foaming assembly includes a plurality of grouting strips that are placed closely with each other, and the grouting strips are composed of Made of water-soluble film, different foaming liquids are installed in different grouting strips; water vapor barrier layer, the water vapor barrier layer is attached to the capsule shell and covers the through-hole structure; adhesive parts, the adhesive parts are arranged on the capsule shell On the part where no through-hole structure is opened, the adhesive part is used to adhere the capsule shell to the anti-seepage membrane of the anti-seepage layer of the landfill; when the foam assembly is soaked by the leachate of the landfill, different The foaming liquids are mixed with each other due to the dissolution of their corresponding grouting strips to form a foamed material. The foamed material expands and fills the void area of the anti-seepage layer of the landfill site after being pressured to push away the water vapor barrier layer. .

[0006] Preferably, the through hole structure includes an open hole provided at the end of the capsule shell and/or a plurality of hollow holes provided at the peripheral wall of the capsule shell.

[0007] Preferably, all of the hollow holes are uniformly distributed in the upper half of the capsule shell when it is placed horizontally, and the adhesive member is located at the lower half of the capsule shell when it is placed horizontally.

[0008] Preferably, the adhesive is a strip, and the strip is located at the bottom of the capsule shell when placed horizontally and extends horizontally.

[0009] Preferably, the number of the grouting bar is two, wherein one of the grouting bar is equipped with the A material component, and the other grouting bar is equipped with the B material component.

[0010] Preferably, the two grouting strips extend helically along the length direction of the capsule shell and are interlaced with each other.

Preferably, described water-soluble film is made of PVA material.

[0012] Preferably, the water vapor barrier layer is absorbent cotton.

[0013] Preferably, the capsule shell is made of PVC material.

The present invention also provides a kind of anti-leakage method that adopts the self-repairing capsule of described landfill anti-seepage layer, comprises the following steps: The parameters of the number of self-healing capsules between two layers of impermeable membranes and the spacing parameters of two adjacent self-healing capsules; horizontally place multiple self-healing capsules in an array between two layers of impermeable membranes, and each self-healing capsule The repairing capsule is adhered to the impermeable membrane of the lower layer, and the opening direction of the through-hole structure is not facing directly downward and not facing obliquely downward.

As mentioned above, the self-repairing capsule and the anti-leakage method of the landfill anti-seepage layer of the present invention have the following beneficial effects: the present invention designs applicable A self-healing capsule for the anti-seepage layer of the landfill. The self-healing capsule can produce a foam material that can fill the voids in the anti-seepage layer of the landfill to form a better anti-seepage layer. Leakage structure, so that the anti-seepage layer of the landfill has better anti-seepage function, realizes the prevention and treatment of the initial situation of leakage, and minimizes pollution. The anti-leakage principle of the self-healing capsule is as follows: the inside of the above-mentioned capsule shell has a foaming reaction chamber, which is convenient for different foaming liquids to mix and react to form a foaming material. The foaming material has a large number of fine void structures; There is a through-hole structure communicating with the foaming reaction chamber, which can allow the foaming material formed in the foaming reaction chamber to expand and overflow to the capsule shell through the through-hole structure, thereby filling the void in the anti-seepage layer of the landfill site. The foaming assembly includes a plurality of grouting strips placed closely with each other. The grouting strips are made of water-soluble film. Since the foaming liquid does not contain water, different foaming liquids are contained in different grouting strips; when the foaming assembly When soaked by the leachate of the landfill, different foaming solutions mix with each other to form a foaming material due to the dissolution of their corresponding grouting strips. Water vapor insulation layer, the water vapor insulation layer is applied on the capsule shell and covers the through-hole structure, which can resist the water vapor originally flowing between the two layers of impervious membranes, and prevent water vapor from flowing into the foaming reaction chamber, that is, the water vapor insulation layer has The performance characteristics of being impermeable to water vapor ensure that only leachate is allowed to penetrate into the foaming reaction chamber, thereby dissolving the grouting strip to produce foamed material. The adhesive part is arranged on the part of the capsule shell that does not have a through-hole structure. The adhesive part is used to adhere the capsule shell to the anti-seepage membrane of the anti-seepage layer of the landfill, which can prevent the capsule shell from being on the anti-seepage membrane. The leaky point that deviates from the anti-seepage layer of the landfill site occurs, thereby effectively ensuring the correctness of the release point of the foamed material. Finally, after the foam material fills the void area of the anti-seepage layer of the landfill, after a preset time, the foam material can be solidified and formed to form a dense and good anti-seepage structure. Therefore, the self-repairing capsule of the landfill anti-seepage layer of the present invention can trigger the formation of a foaming material to fill the gap between the two layers of anti-seepage membranes when the leachate penetrates into the anti-seepage layer of the landfill, thereby improving the impact on the landfill. The anti-seepage structure of the landfill anti-seepage layer is optimized and repaired to solve the problem of landfill leakage that is not discovered in time and cause pollution, and it is convenient to solve the problem that it is difficult to carry out grouting repairs at the deep bottom of the landfill. Conducive to ecological environment protection.

Description of drawings

Fig. 1 shows the perspective view of the self-repairing capsule of the landfill anti-seepage layer of the present invention.

[0017] Figure 2 shows an assembly view of the capsule shell and foam assembly.

[0018] Figure 3 shows a perspective view of the capsule shell.

[0019] Figure 4 shows a perspective view of the foam assembly.

Component label description

<td>1</td><td>capsule shell</td>

<td>11</td><td>Foaming reaction chamber</td>

<td>12</td><td>open hole</td>

<td>13</td><td>hollow hole</td>

<td>2</td><td>Foam assembly</td>

<td>21</td><td>Grouting strip</td>

<td>3</td><td>moisture barrier</td>

<td>4</td><td>Adhesives</td>

Implementation

[0021] The following specific examples illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the disclosed content.

It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings of this institute are only used to coordinate the disclosed content, for those familiar with this technology to understand and read, and are not intended to limit the implementation of the present invention Therefore, it has no technical substantive meaning. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of this invention without affecting the effect and purpose of the present invention. within the scope covered by the technical content disclosed by the invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this document are only for convenience of description and are not intended to limit the present invention. The practicable scope, the change or adjustment of its relative relationship, without any substantial change in the technical content, shall also be regarded as the practicable scope of the present invention.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the present invention provides a kind of self-repairing capsule of anti-seepage layer of landfill, comprising: Capsule shell 1, the inside of capsule shell 1 has foaming reaction cavity 11, the capsule shell 1 is provided with a through-hole structure communicating with the foaming reaction chamber 11; the foaming assembly 2 of the foaming material can be produced, the foaming assembly 2 is accommodated in the foaming reaction chamber 11, and the foaming assembly 2 The assembly 2 includes a plurality of grouting strips 21 placed closely together, the grouting strips 21 are made of water-soluble film, and different foaming liquids are contained in different grouting strips 21; the water vapor insulation layer 3, and the water vapor insulation layer 3 is applied On the capsule shell 1 and cover the through hole structure; Adhesive part 4, the adhesive part 4 is arranged on the position of the capsule shell 1 without the through hole structure, and the adhesive part 4 is used to adhere the capsule shell 1 to the garbage On the anti-seepage film of the anti-seepage layer of the landfill; when the foam assembly 2 is soaked by the leachate of the landfill, different foam solutions are mixed with each other due to the dissolution of the respective corresponding grouting strips 21 to form foam The foam material expands and fills the void area of the anti-seepage layer of the landfill site through the through-hole structure after pressure is applied to push away the water vapor insulating layer 3 .

The present invention designs a kind of self-repairing capsule applicable to the anti-seepage layer of landfill according to the structural form of the anti-seepage layer of the landfill, and the self-repairing capsule can produce foaming material, and this foaming material can Fill the gaps in the anti-seepage layer of the landfill to form a better anti-seepage structure, so that the anti-seepage layer of the landfill has a better anti-leakage function, and realize the initial situation of the leakage. Prevention and treatment to minimize pollution. The anti-leakage principle of the self-healing capsule is as follows:

The inside of the above-mentioned capsule shell 1 has a foaming reaction chamber 11, which is convenient for different foaming liquids to mix and react to form a foaming material. The foaming material has a large number of fine void structures; The interlinked through-hole structure can allow the foaming material formed in the foaming reaction chamber 11 to expand and overflow to the capsule shell 1 through the through-hole structure, thereby filling the voids in the anti-seepage layer of the landfill. The foam assembly 2 comprises a plurality of grouting bars 21 placed closely together, and the grouting bars 21 are made of water-soluble film, and because the foaming liquid does not contain water, different foaming liquids are housed in different grouting bars 21; When the foaming assembly 2 is soaked by the leachate from the landfill, different foaming liquids are mixed with each other due to the dissolution of the corresponding grouting strips 21 to form a foaming material. The water vapor insulating layer 3, the water vapor insulating layer 3 is applied on the capsule shell 1 and covers the through-hole structure, which can resist the water vapor originally flowing between the two layers of impermeable membranes, and prevent the water vapor from flowing into the foaming reaction chamber 11, namely The water vapor insulation layer 3 has the performance characteristics of being impermeable to water vapor, ensuring that only leachate (leachate is generally alkaline and contains chloride ions or sulfate ions) can penetrate into the foaming reaction chamber 11, thereby dissolving the grouting strip 21 to produce foamed material. Adhesive 4 It is arranged on the portion of the capsule shell 1 that does not have a through-hole structure, and the adhesive member 4 is used to adhere the capsule shell 1 to the anti-seepage membrane of the anti-seepage layer of the landfill, so that the capsule shell 1 can be prevented from being damaged by the anti-seepage membrane. The leakage point that deviates from the anti-seepage layer of the landfill site occurs on the top, thus effectively ensuring the correctness of the release point of the foam material. Finally, after the foam material fills the void area of the anti-seepage layer of the landfill, after a preset time, the foam material can be solidified and formed to form a dense and good anti-seepage structure.

Therefore, the self-repairing capsule of landfill anti-seepage layer of the present invention can trigger the formation of foaming material to fill the gap between two layers of anti-seepage membranes when leachate penetrates into landfill anti-seepage layer, Optimize and repair the anti-seepage structure of the anti-seepage layer of the landfill, solve the problem that the leakage of the landfill is not discovered in time and cause pollution, and facilitate the solution to the difficult problem of grouting repair at the bottom of the landfill deep problems, and more conducive to the protection of the ecological environment.

As shown in Figure 3, in order to facilitate above-mentioned leachate to flow in the foaming reaction chamber 11 of capsule shell 1, and to facilitate foaming material towards different directions, more evenly fill to the gap of anti-seepage layer of landfill site area, the through-hole structure includes an open hole 12 opened at the end of the capsule shell 1 and/or a plurality of hollow holes 13 opened at the outer peripheral wall of the capsule shell 1 . Specifically, the capsule shell 1 is a hollow cylindrical structure, and both opposite ends of the capsule shell 1 have open holes 12, that is, the foaming reaction chamber 11 of the capsule shell 1 is straight through.

In order to overflow the foaming material upwards, it is more conducive to the easy leakage point where the foaming material is attached to the anti-seepage film of the upper floor, and all the hollow holes 13 are evenly distributed in the upper half of the capsule shell 1 when placed horizontally , the adhesive member 4 is arranged on the lower half of the capsule shell 1 when placed horizontally.

As shown in Figure 1, in order to reduce the adhesive area of adhesive member 4 and the anti-seepage film of lower floor, described adhesive member 4 is glue strip, and glue strip is located at the bottom of capsule shell 1 when horizontal placement and extend horizontally.

Because foaming material uses polyurethane foaming liquid mixed reaction to produce usually, the quantity of described grouting bar 21 is two, and A material component is housed in wherein a grouting bar 21, and another grouting bar 21 is equipped with B material components.

As shown in Figure 4, in order to ensure that the mixing degree of A material component and B material component is higher after grouting bar 21 dissolves and damages, two grouting bars 21 all spiral along the lengthwise direction of capsule shell 1 extended and intertwined with each other.

Because leachate is generally alkalescence, can directly form soaking environment when seepage produces, therefore, described water-soluble film is made of PVA material, and PVA water-soluble film can customize reinforced type at present, and the thickness of reinforced PVA water-soluble film is 2mm, the tensile strength is 0.5MPa, which can ensure that the foaming liquid is released only when the leachate is soaked.

[0032] In order to reduce the manufacturing cost of the above-mentioned vapor barrier layer 3, the vapor barrier layer 3 is a water-absorbent cotton sheet.

[0033] In order to allow the volume of the above-mentioned capsule shell 1 to have a little expansion, and reduce the manufacturing cost of the above-mentioned capsule shell 1, the capsule shell 1 is made of PVC material.

The present invention also provides a kind of anti-leakage method that adopts the self-repairing capsule of described landfill anti-seepage layer, comprising

The following steps: According to the geological conditions of the area where the anti-seepage layer of the landfill is located, set the number parameters of the self-healing capsules located between the two layers of anti-seepage membranes and the distance parameters between two adjacent self-healing capsules; A plurality of self-healing capsules distributed in an array are placed horizontally between the permeable membranes, and each self-healing capsule is adhered to the lower impermeable membrane. below.

Further, the number of layers of above-mentioned anti-seepage film is two layers, even more, in order to further improve leak-proof effect, the expansion rate of foaming material decreases along with the water pressure value of geological condition with respect to foaming liquid get bigger.

Anti-leakage method of the present invention can make landfill anti-seepage layer have better anti-leakage function.

Specifically, one of the application scenarios of the application's anti-seepage method can be an existing dam body, and the self-repairing capsule is bonded between the upper and lower adjacent two-layer anti-seepage membranes of the landfill anti-seepage layer , the water vapor insulation layer 3 is arranged on the side of the capsule shell 1 facing the inside of the dam body, which can prevent seepage and plugging of small leakage points, and can be customized for the number and density of the setting according to the regional geological conditions, especially For easy seepage points. The foaming material can be a high polymer foaming material, and the expansion ratio of the high polymer foaming material can be adjusted between 5-20 times under different geological conditions according to the needs, and the expansion ratio of the high water pressure (above 1MPa) area is 5 times , In areas with medium water pressure (1-0.5MPa), the magnification is around 10 times, and in low water pressure areas (below 0.5MPa), the magnification is 20 times. The diameter of the capsule shell 1 is 5cm, the length of the capsule shell 1 is 10cm, and the slurry volume of the foam assembly 2 is 0.2kg. The expansion and diffusion range is 0.2-0.4cm, so the distance between the self-healing capsules should be between 0.2-0.6m and adjusted as needed. High-rate expansion will directly seal a large area, and the leakage point can be better blocked in the early stage of seepage, especially for small leakage points.

In summary, the present invention can trigger the formation of foaming material to fill the gap between the two layers of anti-seepage membranes when leachate penetrates into the landfill anti-seepage layer, and the impact on the landfill anti-seepage layer The anti-leakage structure is optimized and repaired to solve the problem of pollution caused by untimely discovery of leakage in the landfill, and it is convenient to solve the problem that it is difficult to perform grouting repair at the bottom of the landfill, which is more conducive to the protection of the ecological environment. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.

[0039] The foregoing embodiments are only illustrative of the principle of the present invention and its effect, rather than limiting the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.