CN114733890A - Underground water restoration and monitoring channel structure for landfill area - Google Patents
Underground water restoration and monitoring channel structure for landfill area Download PDFInfo
- Publication number
- CN114733890A CN114733890A CN202210263666.0A CN202210263666A CN114733890A CN 114733890 A CN114733890 A CN 114733890A CN 202210263666 A CN202210263666 A CN 202210263666A CN 114733890 A CN114733890 A CN 114733890A
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- Prior art keywords
- well pipe
- sleeve
- channel structure
- monitoring channel
- layer
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000003673 groundwater Substances 0.000 claims abstract description 19
- 238000005067 remediation Methods 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims description 14
- 239000004746 geotextile Substances 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 7
- 229920001903 high density polyethylene Polymers 0.000 claims description 6
- 239000004700 high-density polyethylene Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims 2
- 238000001764 infiltration Methods 0.000 claims 2
- 239000002689 soil Substances 0.000 abstract description 23
- 230000000903 blocking effect Effects 0.000 description 7
- 230000007774 longterm Effects 0.000 description 6
- 238000005070 sampling Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920006262 high density polyethylene film Polymers 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a groundwater remediation and monitoring channel structure in a landfill area, which comprises a well pipe and a plurality of impermeable layers, wherein a filter layer is arranged at the bottom end opening of the well pipe, and the impermeable layers are sleeved on the well pipe. The underground water repairing and monitoring channel structure can be combined with each layer of soil structure after repairing through the impermeable layer to form an embedded structure, so that the soil of each layer is prevented from leaking along with the well pipe structure, and the channel structure for underground water repairing is effectively reserved while the soil structure is not influenced.
Description
Technical Field
The invention relates to a repairing channel structure, in particular to a channel structure for repairing and monitoring underground water in a landfill area.
Background
At present, in many polluted soil treatment projects in China, soil after restoration treatment reaches the standard is generally subjected to in-situ blocking backfill. For complex sites with soil and underground water combined pollution, the underground water restoration platform period is long, the effect is slow in the later period, and long-term monitoring is needed. If the synchronous water and soil treatment and the long-term monitoring of underground water at the bottom in a field are required, the lap joint of the impermeable layer and the underground water well is a difficult engineering point, the damage of the soil barrier landfill impermeable layer is easily caused by improper operation, and the secondary pollution of the underground water to the restored up-to-standard soil is caused.
For the comprehensive treatment engineering of the landfill blocking and the groundwater remediation of the polluted soil, in order to ensure that the landfill blocking process and the groundwater remediation process are carried out synchronously or the groundwater in-situ remediation is carried out after the landfill blocking is carried out firstly, a groundwater remediation and monitoring channel structure is required to be built in a landfill area in the field, and the integrity of a landfill blocking and seepage prevention system is ensured while an injection well, an extraction well or a monitoring well for groundwater remediation is reserved.
Disclosure of Invention
The invention provides a groundwater remediation and monitoring channel structure for a landfill area, which can play a role in preventing seepage while reserving a groundwater remediation well.
The invention provides a groundwater remediation and monitoring channel structure in a landfill area, which comprises a well pipe and a plurality of impermeable layers, wherein a filter layer is arranged at the bottom end opening of the well pipe, and the impermeable layers are sleeved on the well pipe.
Furthermore, the well casing also comprises a plurality of strengthening structures, and the impermeable layer is fixedly connected with the well casing through the strengthening structures.
Still further, the reinforcing structure is a pipe shoe structure.
Furthermore, the well pipe, the pipe shoe structure and the impermeable layer are made of HDPE materials.
Further, the exterior of the well pipe is also coated with a non-woven geotextile layer.
Further, the filter layer is a non-woven geotextile layer.
Furthermore, the underground water restoration and monitoring channel structure further comprises a plurality of weight parts, and the weight parts are installed on the well pipe at intervals.
Furtherly, groundwater is restoreed and is monitored access structure still includes prevention of seepage sleeve, prevention of seepage sleeve diameter is greater than the well casing diameter, just prevention of seepage sleeve cover is located well casing top department, just prevention of seepage sleeve with the well casing is equipped with the interval.
Furthermore, an impermeable layer is arranged outside the impermeable sleeve and fixedly connected with the impermeable sleeve.
Furthermore, the underground water restoration and monitoring channel structure further comprises a protective sleeve, the protective sleeve is connected with the anti-seepage sleeve, and the protective sleeve is wholly or partially positioned above the anti-seepage sleeve.
Compared with the prior art, the well pipe can be combined with each layer of the repaired soil structure to form an embedded structure by arranging the impermeable layer, so that the soil of each layer is prevented from leaking along with the well pipe structure, an underground water repairing channel is reserved under the condition that the bottom of a landfill and the impermeable layer structure of a sealing site are not damaged, the later-stage repairing and treatment and long-term monitoring of underground water are realized, the project construction period can be greatly shortened, and the integrity of a landfill blocking system is ensured. Meanwhile, the local sewer repairing and monitoring channel structure can be used as a sampling channel after the landfill is finished, so that the long-term monitoring of solid wastes in a landfill area is realized, and if the soil at the sampling point exceeds the standard, the local sewer repairing and monitoring channel structure can be used as a channel for in-situ repairing and injecting chemicals, thereby achieving multiple purposes.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a well and reinforcing structure connection according to an embodiment of the present invention.
1. A well pipe; 11. a reinforcing structure; 2. an impermeable layer; 3. a filter layer; 4. a counterweight; 5. an impermeable sleeve; 6. and (7) protecting the sleeve.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a landfill area underground water repairing and monitoring channel structure which comprises a well pipe 1 and a plurality of impermeable layers 2, wherein a filter layer 3 is arranged at the bottom end opening of the well pipe 1, and the impermeable layers 2 are sleeved on the well pipe 1.
The diameter of the well pipe 1 is DN 160-DN 200, the soil layer structures of the environment in which the embodiment of the invention is located are shown in figure 1, the soil layer structures comprise a bottom seepage-proofing structure layer, backfilled soil and a field-sealing seepage-proofing structure layer from bottom to top in sequence, the well pipe 1 penetrates through a groundwater drainage layer and then is embedded into a tamping foundation layer (the compaction degree is 0.93), the embedding depth is more than or equal to 500mm, and the channel of the well pipe 1 is kept fixed and vertical. An impermeable layer 2 is arranged in the impermeable structural layer at the bottom, and the well pipe 1 penetrates through the impermeable layer 2 and is connected with the impermeable layer 2 in a sealing way. After the top of the well pipe 1 extends 200 mm-300 mm out of the ground, a pipe plug is arranged at the pipe orifice at the top of the well pipe 1,
according to the embodiment of the invention, the well pipe 1 can be combined with each layer of the repaired soil structure by arranging the impermeable layer 2 to form an embedded structure, so that the soil of each layer is prevented from leaking along with the well pipe 1 structure, an underground water repairing channel is reserved under the condition that the structures of the landfill bottom and the impermeable layer 2 of the sealing field are not damaged, the later-stage repairing and treatment and long-term monitoring of underground water are realized, the project period can be greatly shortened, and the integrity of a landfill blocking system is ensured. Meanwhile, the local sewer repairing and monitoring channel structure can be used as a sampling channel after the landfill is finished, so that the long-term monitoring of solid wastes in a landfill area is realized, and if the soil at the sampling point exceeds the standard, the local sewer repairing and monitoring channel structure can be used as a channel for in-situ repairing and injecting medicines, thereby achieving multiple purposes. In addition, the filter layer 3 is wrapped at the bottom of the well pipe 1 in the embodiment of the invention, so that the inflowing water body can be filtered, and the blockage of the well pipe 1 caused by the suction of silt and the like is avoided.
Optionally, the well casing 1 further comprises a plurality of reinforcing structures 11, and the impermeable layer 2 is fixedly connected with the well casing 1 through the reinforcing structures 11.
In particular, as shown in fig. 2, the reinforcing structure 11 is a pipe shoe structure.
In particular, the well pipe 1, the pipe shoe structure and the impermeable layer 2 are made of HDPE materials.
The pipe boot structure comprises a pipe sleeve and a pipe skirt, wherein the pipe sleeve and the pipe skirt are formed by welding cut HDPE membranes.
During construction, the pipe boot is sleeved outside the well pipe 1, the pipe sleeve and the outer wall of the well pipe 1 are welded and fixed by adopting an extrusion welding machine, and then the pipe skirt and the HDPE film impermeable layer 2 are welded to form an integral structure. After welding, an electric spark detector can be adopted for detecting the quality of the welding seam.
According to the embodiment of the invention, the pipe shoe structure is adopted, so that the external part of the well pipe 1 can be intensively reinforced, the position is ensured to have stronger anti-seepage performance, and the pollution of underground water to the soil at the position is avoided.
Optionally, the exterior of the well pipe 1 is further coated with a non-woven geotextile layer.
Wherein the non-woven geotextile is 600g/m2。
According to the embodiment of the invention, the non-woven geotextile layer is arranged outside the well pipe 1, so that the well pipe 1 structure is effectively protected, and meanwhile, if the well pipe 1 leaks, the non-woven geotextile can effectively prevent soil from falling into the well pipe 1, so that the cleanness of the inside of the well pipe 1 is ensured, and the subsequent repair of the well pipe 1 is facilitated.
Optionally, the filter layer 3 is a nonwoven geotextile layer.
Optionally, the underground water restoration and monitoring channel structure further includes a plurality of weight members 4, and the weight members 4 are installed on the well casing 1 at intervals.
As shown in figure 1, in order to ensure that the channel of the well pipe 1 is vertical to the ground and is not easy to incline and fall down due to lateral pressure in the landfill process, the embodiment of the invention is provided with a plurality of weight parts 4, and the interval between every two adjacent weight parts 4 is 3m-5 m.
During construction, the well pipe 1 can be buried in layers, in the process of burying in layers, each 3m-5m of the well pipe is provided with a group of weight parts 4, and each weight part 4 is a C20 concrete layer which is formed by pouring 200-300mm thick sand around the channel of the well pipe 1 and has the height of 500 mm.
According to the embodiment of the invention, the well pipe 1 can be effectively fixed by arranging the balance weights 4, so that the vibration and the shaking are reduced, and the stress balance effect is kept.
Optionally, the underground water restoration and monitoring channel structure further includes an anti-seepage sleeve 5, the diameter of the anti-seepage sleeve 5 is larger than the diameter of the well pipe 1, the anti-seepage sleeve 5 is sleeved on the top end of the well pipe 1, and the anti-seepage sleeve 5 and the well pipe 1 are spaced.
Particularly, the anti-seepage layer 2 is arranged outside the anti-seepage sleeve 5, and the anti-seepage layer 2 is fixedly connected with the anti-seepage sleeve 5.
As shown in fig. 1, when the landfill needs to be sampled and monitored for a long time, an impermeable sleeve 5 can be arranged, and the impermeable sleeve 5 is an HDPE sleeve. The diameter DN1000 of the seepage-proofing sleeve 5 is, as shown in figure 1, embedded in a clay layer and a planting soil layer of a sealing seepage-proofing structure layer, the embedding depth is more than or equal to 1000mm, and the seepage-proofing sleeve 5 is welded with the HDPE membrane seepage-proofing layer 2, and the seepage-proofing sleeve 5 and the well pipe 1 are provided with a distance, so that the seepage-proofing sleeve 5 can be used as a sampling channel, and workers can conveniently sample and mark the soil between the seepage-proofing sleeve 5 and the well pipe 1 through the seepage-proofing sleeve 5.
In particular, the underground water restoration and monitoring channel structure further comprises a protective sleeve 6, wherein the protective sleeve 6 is connected with the anti-seepage sleeve 5, and the protective sleeve 6 is wholly or partially positioned above the anti-seepage sleeve 5.
Wherein, the protective sleeve 6 is made of steel. The depth of the protective sleeve 6 embedded in the ground is more than or equal to 200mm, and 100-200mm thick C20 concrete is poured along the circumference of the sleeve for fixation. A protective cover plate is arranged on the protective sleeve 6 and locked. Protective sleeve 6 diameter DN250-DN 400; if the seepage-proofing sleeve 5 is arranged outside the well pipe 1 channel to be used as a sampling channel, the diameter DN 1100-DN 1200 of the steel protective sleeve 6.
Finally, it should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the modifications and equivalents of the specific embodiments of the present invention can be made by those skilled in the art after reading the present specification, but these modifications and variations do not depart from the scope of the claims of the present application.
Claims (10)
1. The underground water repairing and monitoring channel structure is characterized by comprising a well pipe and a plurality of impermeable layers, wherein a filter layer is arranged at the bottom end opening of the well pipe, and the impermeable layers are sleeved on the well pipe.
2. The landfill site area groundwater remediation and monitoring access structure of claim 1, wherein the well casing further comprises a plurality of reinforcing structures, and the impermeable layer is fixedly connected to the well casing through the reinforcing structures.
3. The landfill site area groundwater remediation and monitoring channel structure of claim 2, wherein the reinforcing structure is a pipe shoe structure.
4. The underground water restoration and monitoring channel structure for landfill site areas according to claim 3, wherein the well pipe, the pipe shoe structure and the impermeable layer are made of HDPE materials.
5. The landfill site area groundwater remediation and monitoring channel structure of claim 1, wherein the well pipe is further externally coated with a non-woven geotextile layer.
6. The landfill site area groundwater remediation and monitoring channel structure of claim 1, wherein the filter layer is a non-woven geotextile layer.
7. The landfill site area groundwater remediation and monitoring channel structure of claim 1, wherein the groundwater remediation and monitoring channel structure further comprises a plurality of weight members, wherein the weight members are mounted on the well pipe at intervals.
8. The underground water restoration and monitoring channel structure for landfill sites according to claim 1, wherein the underground water restoration and monitoring channel structure further comprises an anti-seepage sleeve, the diameter of the anti-seepage sleeve is larger than that of the well pipe, the anti-seepage sleeve is sleeved at the top end of the well pipe, and a distance is provided between the anti-seepage sleeve and the well pipe.
9. The underground water restoration and monitoring channel structure for the landfill area as claimed in claim 8, wherein an impermeable layer is arranged outside the impermeable sleeve and fixedly connected with the impermeable sleeve.
10. The landfill site area groundwater remediation and monitoring access structure of claim 8, further comprising a protective sleeve connected to the infiltration prevention sleeve, the protective sleeve being located wholly or partially above the infiltration prevention sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210263666.0A CN114733890B (en) | 2022-03-17 | 2022-03-17 | Underground water restoration and monitoring channel structure in landfill area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210263666.0A CN114733890B (en) | 2022-03-17 | 2022-03-17 | Underground water restoration and monitoring channel structure in landfill area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114733890A true CN114733890A (en) | 2022-07-12 |
| CN114733890B CN114733890B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210263666.0A Active CN114733890B (en) | 2022-03-17 | 2022-03-17 | Underground water restoration and monitoring channel structure in landfill area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115532801A (en) * | 2022-10-12 | 2022-12-30 | 上海市政工程设计研究总院（集团）有限公司 | Soil pollution prevention and control system for underground facilities of industrial enterprise |
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| Publication number | Publication date |
|---|---|
| CN114733890B (en) | 2024-04-09 |
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