CN214738298U - Sealing structure of rigid landfill - Google Patents
Sealing structure of rigid landfill Download PDFInfo
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- CN214738298U CN214738298U CN202120471599.2U CN202120471599U CN214738298U CN 214738298 U CN214738298 U CN 214738298U CN 202120471599 U CN202120471599 U CN 202120471599U CN 214738298 U CN214738298 U CN 214738298U
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Abstract
The utility model discloses a sealing structure of a rigid landfill, which comprises a plurality of landfill units, wherein each landfill unit is filled with a landfill body; the structure of closing a yard includes: the flexible anti-seepage structure, the middle drainage layer and the rigid anti-seepage structure are sequentially arranged on the landfill body; the flexible anti-seepage structure comprises a lower protective layer and a sealing anti-seepage layer which are sequentially arranged from bottom to top, the lower protective layer is connected with the side wall protective layer of the landfill unit, and the sealing anti-seepage layer is connected with the side wall anti-seepage layer of the landfill unit. The utility model adopts the mode of combining the rigid seepage-proofing structure and the flexible seepage-proofing structure, which not only can meet the requirements of the sealing structure of the rigid landfill site in the new standard, but also can collect and guide the rainwater permeating into the top concrete; the instability problem of the top concrete structure caused by the settlement of the pile body is avoided, and the long-term stability of the sealing structure is improved.
Description
Technical Field
The utility model relates to a hazardous waste landfill handles technical field, concretely relates to seal structure of rigidity landfill.
Background
The landfill is one of important facilities for solid waste management in China, and is closely related to the life of residents and urban and rural environments. The hazardous waste landfill pollution control standard (GB 18598-. In order to meet the requirements of new standards such as site selection and entrance requirements, the use of rigid landfills is increasing day by day.
In the new standard, only the general requirements on the sealing structure of the rigid landfill site are required, namely, the rigid landfill unit is sealed in time after being filled up, and the sealing structure comprises a high-density polyethylene impermeable film and impermeable concrete with the thickness of more than 1.5 mm. At present, more than ten landfill sites adopting novel rigid landfill structures are put into operation, new projects are also put into use successively, part of landfill units are fully piled up and need to be sealed for covering, and the sealing structures for the novel rigid landfill sites temporarily have no specific referable basis.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a sealing structure of a rigid landfill site, which adopts a mode of combining a rigid anti-seepage structure and a flexible anti-seepage structure, not only can meet the requirements of the sealing structure of the rigid landfill site in new standards, but also can collect and guide rainwater permeating into top concrete; the instability problem of the top concrete structure caused by the settlement of the pile body is avoided, and the long-term stability of the sealing structure is improved.
The utility model discloses a sealing structure of a rigid landfill, which comprises a plurality of landfill units, wherein each landfill unit is filled with a landfill body; the seal structure includes: the landfill pile body is sequentially provided with a flexible anti-seepage structure, a middle drainage layer and a rigid anti-seepage structure;
the flexible anti-seepage structure comprises a lower protective layer and a sealing anti-seepage layer which are sequentially arranged from bottom to top, the lower protective layer is connected with the side wall protective layer of the landfill unit, and the sealing anti-seepage layer is connected with the side wall anti-seepage layer of the landfill unit.
As a further improvement of the utility model, the lower protective layer is non-woven geotextile, and the specification is not lower than 400g/m2(ii) a The seal-off impervious layer and the side wall impervious layer are made of the same impervious material and are high-density polyethylene geomembranes with the thickness not less than 1.5 mm.
As a further improvement, the protective layer is with original under the membrane lateral wall protective layer heat bonding, the sealing barrier layer is with original the lateral wall barrier layer is connected through lateral wall anchor structure and double-deck seal structure.
As a further improvement of the utility model, the side wall impermeable layer is fixed on the side wall of the landfill unit through the side wall anchoring structure, and a geomembrane and a reverse side wall anchoring structure are reserved at the anchoring point; the side wall anchoring structure is mechanically anchored or anchored by an embedded part;
the sealing impermeable layer is welded on the side wall impermeable layer in an extrusion welding mode, and the reserved geomembrane of the side wall impermeable layer is welded on the sealing impermeable layer; and simultaneously, reinforcing the joint position of the sealing impervious layer and the side wall of the landfill unit in a pipe skirt mode to form the double-layer sealing structure.
As a further improvement of the utility model, the middle drainage layer comprises a composite drainage net and a vertical drainage pipe in the vertical direction;
the composite drainage network is provided with a drainage guide slope, the vertical drainage pipe is arranged at the low-level slope of the composite drainage network and penetrates through the vertical drainage guide pipe to the outside of the top of the rigid anti-seepage structure.
As a further improvement, the thickness of the composite drainage net is not less than 5mm, and the vertical drainage pipe is of a T-shaped structure or an inverted L-shaped structure.
As a further improvement of the utility model, the rigid anti-seepage structure comprises an anti-seepage concrete cover plate, a middle supporting beam and an auxiliary functional layer;
the middle supporting beam is fixed to the top of the landfill unit, the impervious concrete cover plate is arranged on the middle supporting beam, and the auxiliary functional layer is arranged on the impervious concrete cover plate.
As a further improvement, the joint pointing is sealed through the low permeability sealant between the impervious concrete apron or between the impervious concrete apron with linking seam between the middle supporting beam.
As a further improvement of the utility model, the impervious concrete cover plate is a prefabricated part, the thickness of the impervious concrete cover plate is not less than 200mm, and the middle supporting beam is a steel-concrete structure or a steel structure with an inverted T-shaped structure; the auxiliary functional layer is an upper protective layer and comprises waterproof mortar, waterproof paint, sprayed concrete and waterproof coiled materials.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model can meet the requirements of the new standard on the sealing structure of the rigid landfill site, and provides reference for the sealing structure of the rigid landfill site under the requirements of the new standard;
2. when the structure layer is divided, the utility model fully combines the characteristics of the novel rigid landfill operation, implements sealing by stages, can meet the requirements of cell division operation and regional division operation, and has stronger implementability;
3. the utility model adopts a mode of combining a rigid seepage-proofing structure and a flexible seepage-proofing structure, can make the upper limit value rainwater enter the landfill body to the maximum extent, and reduce the production of percolate;
4. the utility model can collect and guide the rainwater permeating into the top concrete, and guide the anti-seepage structure out through the rainwater drainage pipe, and simultaneously, the utility model also has the function of monitoring the seepage condition of the rigid anti-seepage structure;
5. the utility model forms the sealing impervious layer and the original side wall impervious layer into an integral structure through the special forms of the anchoring structure and the double-layer sealing structure, thereby preventing external seepage from entering the side wall structure of the landfill unit through gaps;
6. the utility model discloses an add special structures such as middle support beam, for impervious concrete cover plate provides the support, avoided because the heap body subsides the top concrete structure unstability problem that causes, increased the long-term stability of seal structure.
Drawings
Fig. 1 is a schematic cross-sectional view of a seal structure according to an embodiment of the present invention;
fig. 2 is a schematic view of each anti-seepage structure of the seal structure disclosed in an embodiment of the present invention;
fig. 3 is a schematic view of a mechanical double-layer sealing structure of a seal structure according to an embodiment of the present invention;
fig. 4 is a schematic view of a pre-buried double-layer sealing structure of a seal structure according to an embodiment of the present invention;
fig. 5 is a schematic plan view of a rigid anti-seepage structure of a seal structure according to an embodiment of the present invention.
In the figure:
1. burying the pile body; 2. burying a cell sidewall; 3. a flexible impermeable structure; 3-1, a protective layer under the film; 3-2, sealing an impermeable layer; 3-3, double-layer sealing structure; 4. a middle drainage layer; 4-1, a composite drainage net; 4-2, vertically drawing and arranging the pipes; 5. a rigid impermeable structure; 5-1, impervious concrete cover plate; 5-2, a middle supporting beam; 5-3, pointing and sealing; 5-4, an auxiliary functional layer; 6. a sidewall barrier layer; 7. a sidewall anchoring structure; 8. mechanical anchoring; 9. anchoring an embedded part; 10. and (5) extrusion welding.
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.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1 to 5, the utility model provides a sealing structure of a rigid landfill, which comprises a plurality of landfill units, each landfill unit is filled with a landfill body 1; the structure of closing a yard includes: the landfill pile body is sequentially provided with a flexible anti-seepage structure 3, a middle drainage layer 4 and a rigid anti-seepage structure 5; wherein the content of the first and second substances,
the flexible anti-seepage structure 3 of the utility model comprises a lower protective layer 3-1 and a sealing impervious layer 3-2 which are arranged from bottom to top in sequence, wherein the lower protective layer 3-1 is connected with a side wall protective layer (not shown in the figure) of a landfill unit, and the sealing impervious layer 3-2 is connected with a side wall impervious layer 6 of the landfill unit. Wherein, the lower protective layer 3-1 of the utility model is non-woven geotextile with the specification not less than 400g/m2(ii) a The sealing impervious layer 3-2 and the side wall impervious layer 6 are made of the same impervious material, preferably a high-density polyethylene geomembrane with the thickness of not less than 1.5 mm. The utility model discloses a protective layer 3-1 under the membrane bonds with original lateral wall protective layer heat, and sealing barrier layer 3-2 is connected with original lateral wall barrier layer 6 through lateral wall anchor structure 7 and double-layer seal structure 3-3, and double-layer seal structure 3-3 is located landfill unit lateral wall 2 top; specifically, as shown in fig. 3 and 4, the sidewall impermeable layer 3-2 of the present invention is fixed on the sidewall 2 of the landfill unit through a sidewall anchoring structure 7, and a geomembrane is reserved at the anchoring point and the sidewall anchoring structure 7 is reversely wrapped; the side wall anchoring structure 7 surrounds the side wall 2 of the landfill unit for one circle and comprises a mechanical anchoring 8 and an embedded part anchoring 9,wherein the mechanical anchor 8 is in the form of flat steel and expansion bolts, and the embedded part anchor 9 is in the form of E-shaped lock catch or embedded nail geomembrane. The sealing impermeable layer 3-2 is welded on the side wall impermeable layer 6 in an extrusion welding 10 mode, and the reserved geomembrane of the side wall impermeable layer 6 is welded on the sealing impermeable layer 3-2; and meanwhile, reinforcing the joint position of the sealing impervious layer 3-2 and the side wall of the landfill unit in a pipe skirt mode to form a double-layer sealing structure 3-3.
As shown in fig. 1 and 2, the middle drainage layer 4 of the utility model comprises a composite drainage network 4-1 and a vertical drainage pipe 4-2 in the vertical direction; the composite drainage network 4-1 is provided with a certain natural drainage guide slope, the vertical drainage pipe 4-2 is arranged at the low-position slope of the composite drainage network 4-1, and the vertical drainage guide pipe 4-2 passes through the rigid anti-seepage structure 5 and leads to the outside of the top. Wherein, the thickness of the composite drainage network 4-1 is not less than 5mm, the vertical drainage guide pipe 4-2 is higher than the top of the rigid anti-seepage structure and is in a T-shaped structure or an inverted L-shaped structure.
As shown in fig. 1, 2 and 5, the rigid seepage-proofing structure 5 of the utility model comprises a seepage-proofing concrete cover plate 5-1, a middle supporting beam 5-2, a pointing seal 5-3 and an auxiliary functional layer 5-4; the middle supporting beam 5-2 is fixed at the top of the side wall 2 of the landfill unit and provides support for the impervious concrete cover plate 5-1; the anti-permeability concrete cover plates 5-1 are erected on the middle supporting beams 5-2, joint seams between the anti-permeability concrete cover plates 5-1 or between the anti-permeability concrete cover plates 5-1 and the middle supporting beams 5-2 are sealed by pointing through low-permeability sealant 5-3, and the auxiliary functional layers 5-4 are laid on the anti-permeability concrete cover plates 5-1. Further, the impervious concrete cover plate 5-1 is a prefabricated part, the thickness of the impervious concrete cover plate is not less than 200mm, the middle supporting beam 5-2 is a steel-concrete structure or a steel structure in an inverted T-shaped structure, and the middle supporting beam is fixed with the top of the side wall 2 of the landfill unit; the auxiliary functional layer 5-4 is an upper protective layer, comprises waterproof mortar, waterproof paint, sprayed concrete and waterproof coiled materials, and has a certain natural drainage gradient.
The utility model provides a construction method of seal structure of rigidity landfill, include:
1) after the landfill unit is designed, the hazardous waste landfill body 1 is processed according to the design requirement, and the stability of the sealing structure is checked and calculated from the aspects of the compaction degree, the uneven settlement and the like of the landfill body;
2) laying a lower protective layer 3-1, and thermally bonding the lower protective layer 3-1 with the original side wall protective layer;
3) fixing an original side wall impermeable layer 6 on the top of the side wall 2 of the landfill unit through a side wall anchoring structure 7, enabling the side wall anchoring structure 7 to surround the side wall 2 of the landfill unit for a circle, then reversely wrapping the geomembrane, and reserving the geomembrane to be connected with a sealing impermeable layer 3-2;
4) when the side wall anchoring structure 7 is selected, preferably adopting an embedded part anchoring 9, namely an E-shaped lock catch or an embedded nail geomembrane, wherein the mode needs to be embedded when the side wall of the landfill unit is poured; the mechanical anchoring 8 is applied to the side wall of the poured landfill unit;
5) laying a sealing impermeable layer 3-2, welding the sealing impermeable layer 3-2 on a side wall impermeable layer 6 in an extrusion welding 10 mode, and welding a reserved geomembrane of the side wall impermeable layer 6 on the sealing impermeable layer 3-2; and meanwhile, reinforcing the joint position of the sealing impervious layer 3-2 and the side wall 2 of the landfill unit in a pipe skirt manner to form a double-layer sealing structure 3-3.
Step 2, construction of the middle drainage layer 4:
1) horizontally laying a composite drainage net 4-1 with a drainage guide slope on the sealing impervious layer 3-2;
2) a vertical drainage guide pipe 4-2 is arranged at the low-position slope position of the composite drainage network 4-1, and the vertical drainage guide pipe 4-2 passes through the rigid anti-seepage structure 5 and leads to the outer side of the top;
1) according to the size requirements of the anti-permeability concrete cover plate 5-1 and the landfill unit, the middle supporting beam 5-2 is arranged at the top of the landfill unit, and the middle supporting beam 5-2 is fixed with the top of the side wall 2 of the landfill unit to provide support for the anti-permeability concrete cover plate 5-1;
2) prefabricating an anti-permeability concrete cover plate 5-1 in advance according to the design size, erecting the anti-permeability concrete cover plate 5-1 after the construction of the middle supporting beam 5-2 is finished and the strength requirement is met, and performing joint pointing sealing by using a low-permeability sealant 5-3, wherein the unit sealing structure is basically finished;
3) after the landfill unit is sealed, the auxiliary functional layer 5-4 construction is not carried out, a plurality of landfill units are divided into a region, and after the whole region is filled, the auxiliary functional layer 5-4 sealing construction is carried out on the region.
4) The auxiliary functional layer 5-4 is an upper protective layer of the rigid anti-seepage structure 5, a proper protective layer is selected according to actual conditions on site, the protective layer comprises waterproof mortar, waterproof paint, sprayed concrete and waterproof coiled materials, and the auxiliary functional layer is suitable for being built into a certain drainage gradient and is beneficial to guiding and draining rainwater.
The utility model has the advantages that:
1. the utility model can meet the requirements of the new standard on the sealing structure of the rigid landfill site, and provides reference for the sealing structure of the rigid landfill site under the requirements of the new standard;
2. when the structure layer is divided, the utility model fully combines the characteristics of the novel rigid landfill operation, implements sealing by stages, can meet the requirements of cell division operation and regional division operation, and has stronger implementability;
3. the utility model adopts a mode of combining a rigid seepage-proofing structure and a flexible seepage-proofing structure, can make the upper limit value rainwater enter the landfill body to the maximum extent, and reduce the production of percolate;
4. the utility model can collect and guide the rainwater permeating into the top concrete, and guide the anti-seepage structure out through the rainwater drainage pipe, and simultaneously, the utility model also has the function of monitoring the seepage condition of the rigid anti-seepage structure;
5. the utility model forms the sealing impervious layer and the original side wall impervious layer into an integral structure through the special forms of the anchoring structure and the double-layer sealing structure, thereby preventing external seepage from entering the side wall structure of the landfill unit through gaps;
6. the utility model discloses an add special structures such as middle support beam, for impervious concrete cover plate provides the support, avoided because the heap body subsides the top concrete structure unstability problem that causes, increased the long-term stability of seal structure.
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 (9)
1. A field sealing structure of a rigid landfill comprises a plurality of landfill units, wherein each landfill unit is filled with a landfill body; it is characterized in that the sealing structure comprises: the landfill pile body is sequentially provided with a flexible anti-seepage structure, a middle drainage layer and a rigid anti-seepage structure;
the flexible anti-seepage structure comprises a lower protective layer and a sealing anti-seepage layer which are sequentially arranged from bottom to top, the lower protective layer is connected with the side wall protective layer of the landfill unit, and the sealing anti-seepage layer is connected with the side wall anti-seepage layer of the landfill unit.
2. The closure structure of claim 1, wherein said lower protective layer is a nonwoven geotextile having a gauge of not less than 400g/m2(ii) a The seal-off impervious layer and the side wall impervious layer are made of the same impervious material and are high-density polyethylene geomembranes with the thickness not less than 1.5 mm.
3. The seal structure of claim 1, wherein said lower protective layer is thermally bonded to said sidewall protective layer, and said seal barrier is connected to said sidewall barrier layer by a sidewall anchoring structure and a double-layer sealing structure.
4. The seal structure of claim 3, wherein said sidewall barrier is fixed to the landfill sidewall by said sidewall anchoring structure, leaving a geomembrane at the anchoring point and turning over the sidewall anchoring structure; the side wall anchoring structure is mechanically anchored or anchored by an embedded part;
the sealing impermeable layer is welded on the side wall impermeable layer in an extrusion welding mode, and the reserved geomembrane of the side wall impermeable layer is welded on the sealing impermeable layer; and simultaneously, reinforcing the joint position of the sealing impervious layer and the side wall of the landfill unit in a pipe skirt mode to form the double-layer sealing structure.
5. The closeout structure of claim 1, wherein the intermediate drainage layer comprises a composite drainage network and vertically oriented vertical drainage pipes;
the composite drainage network is provided with a drainage guide slope, the vertical drainage pipe is arranged at the low-level slope of the composite drainage network and penetrates through the vertical drainage guide pipe to the outside of the top of the rigid anti-seepage structure.
6. The closure structure of claim 5, wherein the thickness of the composite drainage network is not less than 5mm, and the vertical drainage pipes are in a T-shaped structure or an inverted L-shaped structure.
7. The seal yard structure of claim 1, wherein said rigid impervious structure comprises impervious concrete decking, intermediate support beams and auxiliary functional layers;
the middle supporting beam is fixed to the top of the landfill unit, the impervious concrete cover plate is arranged on the middle supporting beam, and the auxiliary functional layer is arranged on the impervious concrete cover plate.
8. The seal of claim 7, wherein the joints between said impervious concrete cover panels or between said impervious concrete cover panels and said intermediate support beams are joint sealed by a low permeability sealant.
9. The seal yard structure of claim 7, wherein said impervious concrete cover plate is a prefabricated member having a thickness of not less than 200mm, and said intermediate support beam is a steel-concrete structure or a steel structure having an inverted "T" structure; the auxiliary functional layer is an upper protective layer and comprises waterproof mortar, waterproof paint, sprayed concrete and waterproof coiled materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120471599.2U CN214738298U (en) | 2021-03-04 | 2021-03-04 | Sealing structure of rigid landfill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120471599.2U CN214738298U (en) | 2021-03-04 | 2021-03-04 | Sealing structure of rigid landfill |
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| Publication Number | Publication Date |
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| CN214738298U true CN214738298U (en) | 2021-11-16 |
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| CN202120471599.2U Active CN214738298U (en) | 2021-03-04 | 2021-03-04 | Sealing structure of rigid landfill |
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- 2021-03-04 CN CN202120471599.2U patent/CN214738298U/en active Active
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