CN114264507B - Groundwater sampling device, sampling method and installation method - Google Patents
Groundwater sampling device, sampling method and installation method Download PDFInfo
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- CN114264507B CN114264507B CN202111345957.6A CN202111345957A CN114264507B CN 114264507 B CN114264507 B CN 114264507B CN 202111345957 A CN202111345957 A CN 202111345957A CN 114264507 B CN114264507 B CN 114264507B
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- 238000005070 sampling Methods 0.000 title claims abstract description 58
- 239000003673 groundwater Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 22
- 238000009434 installation Methods 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000000926 separation method Methods 0.000 claims abstract description 49
- 230000000903 blocking effect Effects 0.000 claims abstract description 9
- 238000000605 extraction Methods 0.000 claims abstract description 5
- 238000005553 drilling Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 239000006004 Quartz sand Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- 239000002349 well water Substances 0.000 claims description 4
- 235000020681 well water Nutrition 0.000 claims description 4
- 238000010276 construction Methods 0.000 description 13
- 239000004927 clay Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 210000004681 ovum Anatomy 0.000 description 1
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- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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Abstract
The invention provides a groundwater sampling device, which comprises: the side wall of the multisection PE well pipe is provided with a plurality of first through holes for conducting groundwater; the plurality of separation connection structures are used for connecting the plurality of PE well pipes to form a complete straight pipe with a preset length; the two ends of each separation and connection structure are correspondingly connected with the adjacent ends of a pair of PE well pipes into a whole, the separation and connection structure is provided with a blocking plate for separating the adjacent two PE well pipes, and a plurality of connection holes are formed in the blocking plate; the PE collecting pipes are different in length and are used for extending into preset height positions of the PE well pipe so as to sample underground water at the positions; the PE collecting pipe is arranged at the tail end of the PE collecting pipe, which extends into the PE well pipe, and the PE collecting pipe is connected with the PE collecting pipe; when the extraction assembly is started, groundwater at a preset height position in the PE well pipe is extracted through the corresponding PE collection pipe.
Description
Technical Field
The invention belongs to the technical field of groundwater sampling, and particularly relates to a groundwater sampling device, a sampling method and an installation method of the sampling device.
Background
Groundwater is a rich resource in nature, plays an important role in the development of human society, and protection and monitoring of groundwater are becoming more and more important. Due to the interconversion relationship between the groundwater and the surface water, and with the advanced development of modern social industry and agriculture, when the pollutants gather in soil or river, migration, diffusion or direct entry of the pollutants into the groundwater is very likely to be caused, serious pollution of the groundwater is caused, and the groundwater is very difficult to repair, so that the pollution source is difficult to thoroughly destroy. At present, underground water samples are monitored by adopting on-line sampling or monitoring of a built underground water well, because of the complexity of stratum in each region, underground water is often concentrated in different aquifers, and because the isolation effect of each aquifer on pollutants is different, the pollution condition of the underground water of different aquifers needs to be measured, if the underground water condition of different aquifers is monitored and measured, multistage well construction with different depths is needed, the treatment mode is easy to generate the following three defects, namely resource waste is caused by repeated well construction, and the cost is high; secondly, the data acquisition is inaccurate due to multistage well construction, the distances of the wells are relatively close to each other, and different data conditions can be generated due to different stratum conditions when the distances are relatively far; thirdly, the well quality is difficult to control at the same level.
That is, for groundwater sampling work of different aquifers, the prior art samples groundwater of different aquifers through a multi-stage well construction method, and thus, the repeated well construction method has the technical disadvantages of large engineering quantity, high well construction cost, mutual influence of relatively close intervals between wells, and difficulty in controlling the well quality at the same level.
Therefore, how to solve the drawbacks caused by repeated well construction, save well construction procedures, and improve well construction quality is a technical problem that needs to be solved by those skilled in the art for groundwater sampling work of different aquifers.
Disclosure of Invention
The invention provides a groundwater sampling device to at least solve the technical problems
In order to solve the above-mentioned problems, a first aspect of the present invention provides a groundwater sampling device, where groundwater exists at locations of different depths below the ground, the sampling device is used to extend into locations of different depths below the ground, and is used to sample the groundwater through an extraction assembly; the sampling device comprises: a plurality of sections of PE well pipes are provided with a plurality of first through holes on the side walls of the PE well pipes for conducting groundwater; the plurality of separation connecting structures are used for connecting a plurality of sections of PE well pipes to form a complete straight pipe with a preset length; the two ends of each separation connecting structure are correspondingly connected with the adjacent ends of a pair of PE well pipes into a whole, each separation connecting structure is provided with a blocking plate for separating the two adjacent PE well pipes, and a plurality of connecting holes are formed in each blocking plate; the PE collecting pipes are different in length, each PE collecting pipe is used for extending into a preset height position of the PE well pipe through one connecting hole, and a second through hole is formed in the side wall of each PE collecting pipe located at the preset height position so as to sample groundwater located at the preset height position through the second through hole; the PE collecting pipes are arranged at the tail ends of the PE collecting pipes, which extend into the PE well pipes, respectively; when the extraction assembly is started, groundwater at a preset height position in the PE well pipe is extracted through the corresponding PE collection pipe.
In a first aspect, the PE wellbore tubular and the partition connection are detachably connected.
In a first aspect, the separation connection structure is in a circular tube shape, the separation plate is arranged in the circular tube-shaped separation structure, and both ends of the separation connection structure are provided with first internal threads; the PE well pipe is provided with first external threads at the connecting position of the separation connecting structure, and the first external threads are matched with the first internal threads.
In a first aspect, the groundwater sampling device further comprises: the bottom sealing device is arranged at the bottom of the PE well pipe.
In a first aspect, the sampling device further comprises: the dense mesh gauze is sleeved on the periphery of the PE well pipe.
In a first aspect, the occlusion structure comprises: one end of the bolt pipe is connected with one end of the PE collecting pipe through a water stopping bolt; the middle part of the outer side of the bolt tube is provided with a second external thread, and a second internal thread matched with the second external thread of the bolt tube is arranged in a connecting hole of the partition plate; the plugging device is arranged at one end, far away from the collecting pipe, of the bolt pipe.
In the first aspect, the aperture size of the first through hole and the second through hole is 5mm.
In a second aspect, the present invention provides a method for sampling groundwater, for sampling groundwater of aquifers of different heights in the ground by a water intake device, and drilling a well at a target location; the drilling at the target location comprises: drilling a well with preset depth downwards from the surface at the target position; installing the water intake device within the well; plugging the periphery of the water taking device; the plugging of the periphery of the water taking device comprises the following steps: and quartz sand filter layers are filled in the periphery of the water taking device in a layered manner in the well, a bentonite layer is arranged between each two quartz sand filter layers, and concrete is used for pouring after the well mouth is plugged by bentonite.
Further, on the lower section of the well, two adjacent sand egg layer sections are selected, and a clay layer is arranged between the two sections.
In a second aspect, the method further comprises, prior to the sampling the well water: pumping water 3-4 times to the well by using a pumping device so as to observe the water quality in the well.
In a third aspect, the present invention provides a method of installing an underground water sampling device, the underground water sampling device comprising: the PE well pipe comprises a plurality of sections of PE well pipes, a plurality of separation connecting structures, a plurality of PE collecting pipes and a plurality of plugging structures, wherein a plurality of first through holes are formed in the side wall of each section of PE well pipes and used for conducting groundwater; the plurality of separation connection structures are used for connecting the PE well pipes to form a complete straight pipe with a preset length; two ends of each separation connecting structure are correspondingly connected with one adjacent end of a pair of PE well pipes into a whole; the PE collecting pipes are different in length, each PE collecting pipe is used for extending into a preset height position of the PE well pipe through one connecting hole, a second through hole is formed in the side wall of each PE collecting pipe located at the preset height position, and each plugging structure is correspondingly arranged at the tail end of one PE collecting pipe extending into the PE well pipe; arranging a first section of the PE well pipe at the bottom of the well; setting a first section of PE well pipe at the bottom of the well, wherein the first section of PE well pipe is lowered to a preset position at the bottom of the well, and then the bottom of the first section of PE well pipe is plugged through a separation connecting device and a bottom sealing device, so that the first section of PE well pipe is sealed; perforating the side wall of the PE well pipe of the first section; sequentially arranging a plurality of sections of PE well pipes at one end, far away from the bottom of the well, of the first section of PE well pipe according to the steps until the length of the PE well pipe reaches a collection pipeline with a preset length; and sequentially lowering and installing a plurality of PE collecting pipes into the PE collecting pipeline reaching the preset length.
The beneficial effects are that: the invention provides a groundwater sampling device, which is characterized in that a plurality of PE well pipes are butted in a well to form an integrated structure, then the PE well pipes forming the integrated structure are separated by a plurality of separation connection structures according to groundwater levels with different depths to form an independent water taking area, and finally, a plurality of PE collecting pipes correspondingly extend into the water taking areas with different heights to take out groundwater in the corresponding areas; through the mode, the technical purpose that groundwater with different depths can be sampled by drilling one well is achieved, and the technical problems of process waste caused by repeated well construction and mutual influence among multiple wells in the prior art are solved.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an groundwater sampling device according to an embodiment of the invention;
FIG. 2 is a diagram showing a connection structure between a PE well pipe and a partition connection structure according to an embodiment of the invention;
FIG. 3 is a flow chart of a method for sampling groundwater according to a second embodiment of the invention;
reference numerals illustrate:
1. PE well pipe;
101. a first external thread;
2. PE collection tubes;
3. a partition connection structure;
301. a first internal thread;
4. a plugging disc;
5. a bottom sealing device;
6. a bolt tube;
7. a blocking plate;
8. a quartz sand filter layer;
9. a sand ovum layer;
10. a bentonite layer;
11. a clay layer;
12. coarse sand layer.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
Meanwhile, in the embodiment of the present specification, when an element is referred to as being "fixed to" another element, it may be directly on the other element or may be present with an intervening element. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and the like are used in the embodiments of the present specification for the purpose of illustration only and are not intended to limit the present invention.
Embodiment one:
as shown in fig. 1, the first embodiment provides a groundwater sampling device, where groundwater exists at locations with different depths below the ground, and the sampling device is used to extend into locations with different depths below the ground, and is used to sample the groundwater through a pumping assembly; characterized in that the sampling device comprises: a plurality of sections of PE well pipes 1 are arranged, and a plurality of first through holes are formed in the side wall of each section of PE well pipe 1 and are used for conducting underground water; the plurality of separation connecting structures 3 are used for connecting the plurality of sections of PE well pipes 1 to form a complete straight pipe with a preset length; the two ends of each separation and connection structure 3 correspondingly connect the adjacent ends of a pair of PE well pipes 1 into a whole, the separation and connection structure 3 is provided with a blocking plate 7 for separating the adjacent two PE well pipes 1, and a plurality of connection holes are arranged on the blocking plate 7; the PE collecting pipes 2 are different in length, each PE collecting pipe 2 is used for extending into a preset height position of the PE well pipe 1 through one connecting hole, and a second through hole is formed in the side wall of each PE collecting pipe 2 located at the preset height position so as to sample groundwater located at the preset height position through the second through hole; a plurality of plugging structures, wherein each plugging structure is correspondingly arranged at the tail end of one PE collecting pipe 2 extending into the PE well pipe 1; when the pumping assembly is started, groundwater at a preset height position in the PE well pipe 1 is pumped through the corresponding PE collecting pipe 2.
In the technical scheme, a plurality of PE well pipes 1 are butted in a well to form an integrated structure, then the PE well pipes 1 with the integrated structure are separated by a plurality of separation connecting structures 3 according to the groundwater levels with different depths to form an independent water taking area, and finally the PE collecting pipes 2 are correspondingly extended into the water taking areas with different heights to take out groundwater in the corresponding areas; through the mode, the technical purpose that groundwater with different depths can be sampled by drilling one well is achieved, and the technical problems of process waste caused by repeated well construction and mutual influence among multiple wells in the prior art are solved.
Specifically, regarding the connection relationship between the PE well pipe 1 and the split connection structure in the above embodiment, the first embodiment proposes an implementation manner, which includes: the PE well pipe 1 and the separation connecting structure 3 are detachably connected, so that the PE well pipe 1 and the separation connecting structure 3 can be gradually and respectively connected in the well construction process and the subsequent disassembly process.
Further, for the detachable connection relationship between the PE well pipe 1 and the split connection structure, a specific implementation manner is provided in the first embodiment, and the specific implementation manner includes: the separation connecting structure 3 is in a round tube shape, the separation plate is arranged in the round tube-shaped separation structure, and the two ends of the separation connecting structure 3 are provided with first internal threads 301; the connection position of the PE well pipe 1 and the separation connection structure 3 is provided with a first external thread 101, and the first external thread 101 is matched with a first internal thread 301, so that the detachable connection of the separation connection structure and the PE well pipe 1 can be completed through the first external thread 101 and the first internal thread 301.
Specifically, for the groundwater sampling device, a specific embodiment is also provided, which includes a bottom sealer 5, and the bottom sealer 5 is disposed at the bottom of the PE well pipe 1 to ensure the tightness of the PE bottom sealer 5.
Further, for the groundwater sampling device, the device also comprises a dense mesh gauze sleeved on the periphery of the PE well pipe 1, and the dense mesh gauze is used for placing underground large-particle structures to impact the PE well pipe 1.
Specifically, for the plugging structure of the above embodiment, the first embodiment proposes an implementation manner, which includes: the device comprises a bolt pipe 6 and a plugging device, wherein one end of the bolt pipe 6 is connected with one end of the PE collecting pipe 2 through a water stopping bolt; the middle part of the outer side of the bolt tube 6 is provided with a second external thread, and a second internal thread matched with the second external thread of the bolt tube 6 is arranged in the connecting hole of the partition plate; the stopper is disposed at the end of the bolt tube 6 remote from the collection tube.
Further, as for the sizes of the first through hole and the second through hole in the above embodiment, the first embodiment proposes an implementation manner, which includes: the aperture size of the first through hole and the second through hole is 5mm.
Further, for the selection and the size of the PE well pipe 1 and the PE collection pipe 2, the first embodiment proposes an embodiment including: the PE well pipe 1 is divided into two types of 0.5m and 1.0m in length, connection lengthening treatment can be carried out through a separation connecting disc, the PE well pipe 1 can be divided into two types of 75mm and 100mm in diameter, hole opening treatment can be carried out after underground condition judgment is carried out by drilling cores on site on the PE well pipe 1, the hole opening diameter is 5mm, the diameter of a PE collecting pipe 2 is 25mm, the PE collecting pipe 1 is divided into two types of 0.5m and 1.0m in length, the PE collecting pipe 2 in a collecting layer is uniformly drilled, the hole opening diameter is 5mm, the separation connecting disc is 3-hole, 4-hole and 5-hole, 3-layer, 4-layer and 5-layer underground water are correspondingly arranged, and the type and the quantity required by the separation connecting system are determined according to site practice.
Embodiment two:
the invention provides a sampling method of groundwater, which is used for sampling groundwater of aquifers with different heights underground through a water taking device and drilling a well at a target position; the drilling at the target location comprises: drilling a well with preset depth downwards from the surface at the target position; installing the water intake device within the well; plugging the periphery of the water taking device; the plugging of the periphery of the water taking device comprises the following steps: a quartz sand filter layer 8 is filled at the periphery of the water taking device in the well, and concrete is used for pouring after the well mouth is plugged by bentonite; sampling the well water.
In the technical scheme of the second embodiment, the water taking device is installed in the well after the well is drilled, and then the periphery of the water taking device is plugged, so that secondary pollution to water samples in the well after well construction is prevented, and the accuracy of underground water sampling is disturbed.
Further, before sampling the well, the second embodiment also proposes an implementation manner, which includes: pumping water for 3-4 times by using the water pumping device to observe the water quality in the well, if the water quality meets the sampling standard, continuing sampling, and if the water quality does not meet the sampling standard, settling until the water quality meets the sampling standard.
Embodiment III:
the third embodiment provides an installation method of an underground water sampling device, where the underground water sampling device includes: the PE well pipe comprises a plurality of sections of PE well pipes 1, a plurality of separation connecting structures 3, a plurality of PE collecting pipes 2 and a plurality of plugging structures, wherein a plurality of first through holes are formed in the side wall of the PE well pipe 1, and are used for conducting groundwater; the plurality of separation connecting structures 3 are used for connecting a plurality of sections of PE well pipes 1 to form a complete straight pipe with a preset length; the two ends of each separation connecting structure 3 are correspondingly connected with the adjacent ends of a pair of PE well pipes 1 into a whole; the lengths of the PE collection tubes 2 are different, each PE collection tube 2 is used for extending into a preset height position of the PE well pipe 1 through one connecting hole, a second through hole is formed in the side wall of each PE collection tube 2 located at the preset height position, and each plugging structure is correspondingly arranged at the tail end of one PE collection tube 2 extending into the PE well pipe 1; arranging a first section of the PE well pipe 1 at the bottom of the well; setting a first section of PE well pipe 1 at the bottom of the well comprises the steps of lowering the first section of PE well pipe 1 to a preset position at the bottom of the well, and plugging the bottom of the first section of PE well pipe 1 through a separation connecting device and a bottom sealing device 5 to enable the first section of PE well pipe 1 to be sealed; perforating the side wall of the PE well pipe 1 of the first section; sequentially arranging a plurality of sections of PE well pipes 1 at one end, far away from the bottom of the well, of the first section of PE well pipe 1 according to the steps until the length of the PE well pipe 1 reaches a collection pipeline with a preset length; and sequentially lowering and installing a plurality of PE collecting pipes 2 into the PE collecting pipe 2 which reaches a preset length.
In the technical scheme of the third embodiment, a first section of PE well pipe 1 is arranged at the bottom of a well, a mounting foundation is established, holes are formed in the side wall of the first section of PE well pipe 1, the first section of PE well pipe 1 is mounted, a plurality of sections of PE well pipes 1 are sequentially arranged on the upper portion of the first section of PE well pipe 1 until all the PE well pipes 1 are mounted, a PE well pipe 1 pipeline with a preset length is formed, and finally a plurality of PE collecting pipes 2 are sequentially lowered and mounted in the PE well pipe 1 pipeline with the preset length.
Further, the sequentially lowering and installing the plurality of PE collecting pipes 2 into the PE well pipe 1 pipe line reaching the preset length includes: firstly, uniformly perforating PE collecting pipe 2, secondly, assembling PE collecting pipe 2 on a separation connecting system required by a layer 2, mutually screwing internal threads of PE collecting pipe 2 and external threads of bolt pipe 6 to form the connecting system, clockwise screwing bolt pipe 6 until the middle threads of the inner threads completely penetrate through the upper surface of a separation connecting disc, then screwing a water stopping bolt, clockwise screwing the lower end of PE collecting pipe 2 with a rubber pad and a screwing clamping groove between the inner part of the water stopping bolt and the separation connecting disc, ensuring a water stopping effect after clockwise screwing, screwing bolt pipes 6 on the other separation connecting systems by using a plugging device, mutually attaching the internal threads of the plugging device and the external threads of bolt pipe 6 to form a sealing, clockwise screwing the bolt pipe 6 and the water stopping bolt according to the method, and according to the scheme, if a clay layer 11 is shown, not perforating PE well pipe 1 and connecting other PE collecting pipes 2, wherein the layer 2 only plays a role in connection, the lower end of PE collecting pipe 2 is clockwise screwed with bolt pipe 6, the upper end of PE collecting pipe 6 is clockwise screwed, and simultaneously, and the other water stopping bolts are sequentially screwed according to the steps.
Since the second embodiment and the first embodiment are an embodiment under the same inventive concept, the partial structures thereof are completely the same, and therefore, the structure substantially the same as that of the first embodiment in the second embodiment is not described in detail, and the detailed description thereof is omitted herein.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the above examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit of the corresponding technical solutions. Are intended to be encompassed within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (2)
1. The underground water sampling method is used for sampling underground water of aquifers with different heights underground through a sampling device, the underground water exists at positions with different depths below the ground surface, and the sampling device is used for extending into the positions with different depths below the ground surface and is used for sampling the underground water through an extraction assembly; characterized in that the sampling device comprises:
a plurality of sections of PE well pipes are provided with a plurality of first through holes on the side walls of the PE well pipes for conducting groundwater;
the plurality of separation connecting structures are used for connecting a plurality of sections of PE well pipes to form a complete straight pipe with a preset length; the two ends of each separation connecting structure are correspondingly connected with the adjacent ends of a pair of PE well pipes into a whole, each separation connecting structure is provided with a blocking plate for separating the two adjacent PE well pipes, and a plurality of connecting holes are formed in each blocking plate; the PE well pipe is detachably connected with the separation connecting structure; the separation connecting structure is in a circular tube shape, the separation plate is arranged in the separation connecting structure in the circular tube shape, and first internal threads are arranged at two ends of the separation connecting structure; a first external thread is arranged at the connecting position of the PE well pipe and the separation connecting structure, and the first external thread is matched with the first internal thread;
the PE collecting pipes are used for extending into the preset height position of the PE well pipe through one connecting hole, and a second through hole is formed in the side wall of each PE collecting pipe located at the preset height position so as to sample groundwater located at the preset height position through the second through hole; the aperture sizes of the first through hole and the second through hole are 5mm;
the PE collecting pipes are arranged at the tail ends of the PE collecting pipes, which extend into the PE well pipes, respectively; the plugging structure comprises: one end of the bolt pipe is connected with one end of the PE collecting pipe through a water stopping bolt; the middle part of the outer side of the bolt tube is provided with a second external thread, and a second internal thread matched with the second external thread of the bolt tube is arranged in a connecting hole of the partition plate; the plugging device is arranged at one end of the bolt pipe far away from the collecting pipe;
when the extraction assembly is started, the groundwater at the preset height position in the PE well pipe is extracted through the corresponding PE collection pipe;
the sampling device further comprises: the bottom sealing device is arranged at the bottom of the PE well pipe; the dense mesh gauze is sleeved on the periphery of the PE well pipe;
the sampling method comprises the following steps:
drilling a well at a target location; the drilling at the target location comprises: drilling a well with preset depth downwards from the surface at the target position;
installing the sampling device within the well;
plugging the periphery of the sampling device; the plugging of the periphery of the sampling device comprises: filling quartz sand filter layers in the periphery of the sampling device in a layered manner in the well, arranging bentonite layers between each quartz sand filter layer, plugging a wellhead position by bentonite, and pouring by concrete;
sampling the well water;
said installing said sampling device within said well comprises:
arranging a first section of the PE well pipe at the bottom of the well; setting a first section of PE well pipe at the bottom of the well, wherein the first section of PE well pipe is lowered to a preset position at the bottom of the well, and then the bottom of the first section of PE well pipe is plugged through a separation connecting structure and a bottom sealing device, so that the first section of PE well pipe is sealed;
perforating the side wall of the PE well pipe of the first section;
sequentially arranging a plurality of sections of PE well pipes at one end, far away from the bottom of the well, of the first section of PE well pipe according to the steps until the length of the PE well pipe reaches the PE well pipe line with the preset length;
and sequentially lowering and installing a plurality of PE collecting pipes into the PE well pipe line reaching the preset length.
2. The method of sampling groundwater according to claim 1, wherein prior to sampling the well water, the method further comprises:
pumping water 3-4 times to the well by using a pumping device so as to observe the water quality in the well.
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| CN214427419U (en) * | 2021-03-02 | 2021-10-19 | 南京大学环境规划设计研究院集团股份公司 | Underground water layering monitoring well |
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2021
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| JP2002054382A (en) * | 2000-08-10 | 2002-02-20 | Kajima Corp | Device and method foe sampling underground water |
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| CN108956211A (en) * | 2018-09-25 | 2018-12-07 | 北京市环境保护科学研究院 | Ground water fixed depth sampling probe, sampling system and the method for sampling using the probe |
| CN110146332A (en) * | 2019-04-30 | 2019-08-20 | 同济大学 | A kind of groundwater monitoring well device and groundwater sampling method |
| CN214427419U (en) * | 2021-03-02 | 2021-10-19 | 南京大学环境规划设计研究院集团股份公司 | Underground water layering monitoring well |
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