CN106769206B - Modularized underground water single-well multilayer identification sampling system - Google Patents
Modularized underground water single-well multilayer identification sampling system Download PDFInfo
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Abstract
The invention relates to a modularized underground water single-well multilayer identification sampling system, which comprises at least two sampling modules which are sequentially installed from bottom to top, wherein each sampling module comprises a main pipe and a secondary pipe which is internally arranged in the main pipe; the main pipe comprises a slotted main pipe, a water-stopping main pipe and a main pipe blind pipe, the slotted main pipe is provided with a slot, and the water-absorbing expansion material is wrapped outside the water-stopping main pipe; the secondary pipe comprises a secondary pipe filter pipe and a secondary pipe blind pipe, and a filter seam is arranged on the secondary pipe filter pipe; the lower plugging layer, the secondary pipe filter pipe and the upper plugging layer are sequentially arranged in the slotted main pipe from bottom to top, and the secondary pipe filter pipe is positioned at the position of the slot; the cavity enclosed by the secondary pipe main pipe, the slotted main pipe, the lower plugging layer and the upper plugging layer is filled with filter materials; the upper end of the secondary pipe filter pipe is connected with a secondary pipe blind pipe which extends upwards to the top of the main pipe blind pipe of the uppermost sampling module. The invention adopts a direct penetration method to mount the sampling module step by step, can effectively avoid the penetration and the overflow between the water-containing layers, and is convenient and quick to mount.
Description
Technical Field
The invention relates to the technical field of underground water identification sampling systems, in particular to a modularized underground water single-well multilayer identification sampling system which is suitable for industries such as high-precision investigation in a complex site, identification and identification of underground pollution in the site, analysis of underground pollutants and the like, and can be used for collecting underground water pollution samples at layers with different depths in a single well so as to achieve the purpose of distinguishing different underground water pollution degrees and ranges.
Background
The underground water monitoring well is a common engineering mode for evaluating the underground water environment of a field, and is an important measure for grasping the dynamic change characteristics of underground water, evaluating underground water resources, investigating underground water pollution, carrying out underground water monitoring and other works. The underground water monitoring well provides a sample collection platform for underground water analysis and detection, and the structure and quality of the underground water monitoring well determine the data stability, relevance and integrity of the underground water sample analysis result. The single-well multilayer sampling monitoring well has more prior inventions and application examples, for example, a honeycomb well appears in the 90 th year of the last century, an inner well is inserted in an outer well in a layered manner, filtering materials and sealing fillers are filled in a layered manner, the honeycomb monitoring well is also called as a honeycomb monitoring well, a submersible pump and a self-priming pump are placed in the inner well for mechanical sampling, or an artificial belleville pipe is adopted for manual collection; as another CTM system developed by the canadian solvent company in recent years, by improving the manufacturing process of the PVC well pipe in the monitoring well, a plurality of water channels are designed in one PVC well pipe, each water channel is independently circulated through one aquifer, and the water level and water quality of the aquifer are monitored.
With the development of the field environment investigation industry, for field stratum characteristics with high heterogeneity and large stratum quantity, the precision requirement of pollution investigation is higher and higher, and especially the pollution range of groundwater in the vertical direction is more required to be scientifically and effectively identified, judged and authenticated. The identification of the ground water pollution depth is generally carried out according to the water level depth and the water quality condition as the judgment basis, so that the difference of the ground water monitoring well sampling platforms determines the identification degree of the pollution investigation judgment basis and the validity of the investigation result.
The application of technology is generally continuously updated with the development and change of industry. The well forming process of the single-well multilayer sampling well mostly adopts the traditional construction method of loading the single-well multilayer sampling well after hole forming, and is suitable for industries such as water level monitoring, hydrogeological parameter measurement and the like, but when aiming at the problems of complex underground water pollution types, vertical pollution distribution identification of small-scale pollution fields, investigation results are misjudged because the hole forming time is long, cross pollution of water-bearing layer pollutants is caused in the hole forming process, and underground water of an upper water-bearing layer after well forming flows into a lower water-bearing layer along the wall surface of a drilling hole and is uniformly mixed with underground water of the lower water-bearing layer, so that the depth identification of the pollution is difficult to reach; secondly, in the construction process of the single-well multilayer monitoring well, the well pipes in the single well are dense due to the limitation of the pipe well, especially, the number of the well pipes in the water-bearing layer hole in the upper layer is large, the space between the well pipes is small, the plugging filler is not tightly filled, the underground water between the water-bearing layers flows over in the inside of the drilled hole, the pollutants penetrate between the water-bearing layers, and parameters such as the water quality and the water level of the water-bearing layer are difficult to distinguish; and thirdly, if the penetrating and flowing phenomenon occurs in the well forming process in the investigation stage, the upper pollutant is diffused in the vertical direction to deeper stratum, so that the pollution range is enlarged and the risk of aggravation is caused. Therefore, the above-mentioned technology can cause the problems of cross contamination of the underground of the pollutant, definite depth of pollution, or difficult actual construction, etc. whether it is a well-forming process or actual construction, etc., and further cause the pollution responsibility to be difficult to clear, and the subsequent improvement of pollution site is difficult to develop.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the invention aims to provide a modularized underground water single-well multi-layer identification sampling system which is simple in structure, convenient to install, low in cost and capable of being repeatedly used, can be directly penetrated into a single well to sample different aquifers, can avoid penetrating and flowing beyond the aquifers, and ensures the integrity and effectiveness of detection data.
In order to solve the technical problems, the invention comprises the following components:
a modular groundwater single well multilayer identification sampling system is characterized in that: the system comprises at least two sampling modules which are sequentially installed from bottom to top, wherein each sampling module comprises a main pipe, a secondary pipe which is internally arranged in the main pipe, a lower plugging layer and an upper plugging layer; the main pipe comprises a slotted main pipe, a water-stopping main pipe and a main pipe blind pipe which are sequentially connected from bottom to top, wherein a slot is formed in the pipe wall of the middle part of the slotted main pipe, and a water-absorbing expansion material is wrapped outside the water-stopping main pipe; the secondary pipe comprises a secondary pipe filter pipe and a secondary pipe blind pipe, and a filter seam is arranged on the pipe wall of the secondary pipe filter pipe; the lower plugging layer, the secondary pipe filter pipe and the upper plugging layer are sequentially arranged in the slotted main pipe from bottom to top, and the secondary pipe filter pipe is arranged at the position of the slot; the hollow cavity surrounded by the secondary pipe main pipe, the slotted main pipe, the lower plugging layer and the upper plugging layer is filled with filter materials; the upper end of the secondary pipe filter pipe is connected with at least one secondary pipe blind pipe which extends upwards to the top of the main pipe blind pipe of the uppermost sampling module; the upper plugging layer of the sampling module and the lower plugging layers and the upper plugging layers of all the sampling modules above are respectively provided with a through hole for the secondary tube blind tube to pass through.
The split main pipe and the water stop main pipe, the water stop main pipe and the main pipe blind pipe, and the main pipe blind pipe of the downsampling module and the split main pipe of the upsampling module are detachably connected in a threaded connection mode.
The secondary pipe filter pipes are detachably connected with the secondary pipe blind pipes and the adjacent secondary pipe blind pipes in a threaded connection mode.
The system also includes a cone drill bit mounted to the lower end of the slotted main tube of the lowermost sampling module.
The upper end of the cone drill bit is detachably connected with the lower end of the slotted main pipe in a threaded connection mode.
The system also comprises a pressure-bearing top cover which is detachably arranged at the upper end of the blind pipe of the main pipe in a threaded connection mode during construction.
The lower end face of the pressure-bearing top cover is embedded with a rubber solid buffer plug.
The outside of the slot of the slotted main pipe is wrapped with a filter screen.
The lower end of the secondary pipe filter pipe of the lowest sampling module is connected with a secondary pipe blind pipe with a bottom cover, and a through hole for the secondary pipe blind pipe to pass through is arranged on the lower plugging layer.
The lower plugging layer and the upper plugging layer are fixed on the slotted main pipe through screws, and screw holes for the screws to pass through are formed in the pipe wall of the slotted main pipe.
Compared with the prior art, the modularized underground water single-well multi-time identification sampling system has the following advantages:
(1) By adopting a single well direct injection well forming method, sampling modules are sequentially installed step by step from bottom to top, and excessive stratum disturbance in the drilling well forming process can be avoided.
(2) For different aquifers, one sampling module corresponds to one aquifer, the design that the plugging layer and the water-stop main pipe are arranged on the upper and lower sides of the secondary pipe filter pipe in the slotted main pipe are all provided with water-absorbing expansion materials is adopted, an inner and outer integrated water-stop structure is formed between each water-stop layer, the penetrating overflow phenomenon between the aquifers and the risk of expanding the vertical range of pollution are effectively avoided, the underground water collected by each sampling module is ensured not to be mixed with each other and cross-polluted, the purposes of identifying, sampling and analyzing the pollution depth are achieved, and accordingly the integrity and the effectiveness of monitoring data are ensured.
(3) The modular assembly mode is adopted, the pipe is prefabricated, the specification can be adjusted according to the site conditions, and the variety is rich; the well is convenient and quick to install, all the component installation operations are completed in the space above the ground, the module components are installed along with the preset penetration depth, and the operation is simple and convenient along with the penetration.
(4) In the process of installing the secondary pipe which is used for circulating underground water in the main pipe, the plugging material can be selected according to the actual situation of the site, such as the type of site pollutant, the stratum depth and the like, and the construction operation flexibility is high.
(5) The material is pulled out after the monitoring and sampling work of the multilayer aquifer is completed, and the main pipe can be recycled, so that the material cost is reduced.
Drawings
Fig. 1: the invention discloses a decomposition and installation schematic diagram of a modularized underground water single-well multi-layer identification sampling system.
Fig. 2: the invention discloses an application example schematic diagram of a modularized underground water single-well multi-layer identification sampling system.
Detailed Description
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
As shown in fig. 1 and 2, a modular underground water single-well multi-layer identification sampling system comprises at least two sampling modules, a cone-shaped drill bit 40 and a pressure-bearing top cover 50 which are sequentially installed from bottom to top, wherein each sampling module comprises a main pipe, a secondary pipe arranged in the main pipe, a filter material 31, a lower plugging layer 32 and an upper plugging layer 33. In this embodiment, a single well identification sampling system consisting of three sampling modules is employed for a formation containing three aquifers.
The main pipe comprises a slotted main pipe 11, a water stopping main pipe 12 and a main pipe blind pipe 13 which are sequentially connected from bottom to top, and the main pipe blind pipe 13 of the lower sampling module is connected with the slotted main pipe 11 of the upper sampling module; the pipe wall in the middle of the slotted main pipe 11 is provided with a plurality of slots 111, the slots of the slots 111 are not larger than the particle size of the filter material in principle, for example, the slots are larger than the particle size of the filter material, and a filter screen needs to be wrapped outside the slots 111 to prevent the filter material 31 from flowing outwards; the water-absorbing expansion material 121 is wrapped outside the water-stopping main pipe 12, so that the phenomenon of overflow mixing between aquifers is prevented, and the risk of expanding the vertical range of pollution is avoided.
The secondary pipe comprises a secondary pipe filter pipe 21 and a secondary pipe blind pipe 22; a plurality of filter slits 211 are arranged on the pipe wall of the secondary pipe filter pipe 21; the lower plugging layer 32, the secondary pipe filter tube 21 and the upper plugging layer 33 are sequentially arranged in the slotted main pipe 11 from bottom to top, and the secondary pipe filter tube 21 is positioned at the position of the slot 111; the hollow cavity surrounded by the secondary pipe filter tube 21, the slotted main pipe 11, the lower plugging layer 32 and the upper plugging layer 33 is filled with filter materials 31. The upper end of the secondary pipe filter pipe 21 is connected with at least one secondary pipe blind pipe 22, and the secondary pipe blind pipe 22 extends upwards to the top of the main pipe blind pipe 13 of the uppermost sampling module; the upper plugging layer 33 of the sampling module, and the lower plugging layer 32 and the upper plugging layer 33 of all the sampling modules above are provided with through holes for the secondary blind pipes 22 to pass through.
Each sampling module is provided with a plugging layer in the space above and below the secondary pipe filter tube 21 in the slotted main pipe 11, the secondary pipe blind pipe at the upper end of the secondary pipe filter tube extends to the top of the main pipe blind pipe of the uppermost sampling module, and the water stopping main pipe is externally wrapped with a water-absorbing expansion material, so that an internal and external integrated water stopping structure is formed between each water stopping layer, the penetrating overflow phenomenon between the water containing layers and the risk of expanding the vertical range of pollution are effectively avoided, the underground water collected at each sampling module is ensured not to be mixed and cross-polluted mutually, and the purposes of identifying, identifying and sampling analysis of the pollution depth are achieved, thereby ensuring the integrity and the effectiveness of monitoring data.
The installation process of the sampling module is as follows: a lower blocking layer 32 is firstly installed in the slotted main pipe 11, and then a secondary pipe blind pipe 22 is installed in the lower blocking layer 32; the upper end of the secondary pipe blind pipe 22 is connected with a secondary pipe filter pipe 21, and meanwhile, a filter material 31 is filled in an annular cavity between the secondary pipe filter pipe 21 and the slotted main pipe 11, and the secondary pipe filter pipe 21 is covered by the height of the filter material 31; at least one secondary pipe blind pipe 22 and an upper plugging layer 33 are arranged on the upper part of the secondary pipe filter pipe 21; then, installing a water stop main pipe 12 at the upper end of the slotted main pipe 11, and fixing the lower plugging layer 32 and the upper plugging layer 33 on the slotted main pipe 11 through screws 112 at the moment; finally, a main pipe blind pipe 13 with a corresponding length size is selected according to the thickness of the field stratum and is arranged at the upper end of the water stop main pipe 12, so that the complete sampling module is finished.
In a specific embodiment, the lower blocking layer 32 and the upper blocking layer 32 are fixed to the slotted main pipe 11 through screws 112, and screw holes through which the screws 112 pass are provided on the pipe wall of the slotted main pipe 11. The lower end of the secondary pipe filter pipe 21 of the lowest sampling module is connected with a secondary pipe blind pipe 22 with a bottom cover, and a through hole for the secondary pipe blind pipe 22 to pass through is arranged on the lower plugging layer 32.
The components of the main pipe and the components of the secondary pipe are assembled in a detachable connection mode, so that the well is convenient and quick to install, and the module components are installed along with the preset penetration depth.
The split main pipe 11 and the water stop main pipe 12, the water stop main pipe 12 and the main pipe blind pipe 13, and the main pipe blind pipe 13 and the split main pipe 11 of the downsampling module are detachably connected in a threaded connection mode, and specifically: the lower ends of the slotted main pipe 11, the water stop main pipe 12 and the main pipe blind pipe 13 are respectively provided with an external thread interface, and the upper ends are respectively provided with an internal thread interface.
The secondary filter tube 21 and the secondary blind tube 22 and the adjacent secondary blind tubes 22 are detachably connected in a threaded connection mode, specifically: the lower ends of the secondary pipe filter pipe 21 and the secondary pipe blind pipe 22 are respectively provided with an external thread interface, and the upper ends are respectively provided with an internal thread interface.
The cone-shaped drill bit 40 is a solid drill bit and is arranged at the lower end of the slotted main pipe 11 of the lowest sampling module; the conical drill bit 40 is detachably connected with the lower end of the slotted main pipe 11 in a threaded connection manner, specifically: the upper end of the cone drill bit 40 is provided with an internal threaded interface which is matched with the external threaded interface of the lower end of the slotted main pipe 11.
The pressure-bearing top cover 50 is used for protecting the secondary pipe in the main pipe during construction, and is arranged at the top of the blind pipe 13 of the main pipe during construction; a rubber solid buffer plug 51 is embedded in the lower end surface of the pressure-bearing top cover 50 to protect the secondary pipe in the main pipe from pressure stress during the construction process of direct penetration. The lower end of the pressure-bearing top cover 50 is detachably connected with the upper end of the main pipe blind pipe 13 in a threaded connection mode, specifically: the lower end of the pressure-bearing top cover 50 is provided with an external threaded interface matched with the internal threaded interface at the upper end of the main pipe blind pipe 13.
Fig. 2 shows an application example of the system for identifying and adopting a single well and multiple layers of modularized underground water according to the invention, wherein 61 is the ground, 62 is the submerged aquifer, 63 is the first aquifer, 64 is the second aquifer, 65 is the second aquifer, 66 is the third aquifer, 67 is the waterproof bottom plate, A is the submerged aquifer water outlet and sampling, B is the second aquifer water outlet and sampling, and C is the third aquifer water outlet and sampling.
The method for installing sampling modules corresponding to each aquifer step by step from bottom to top is adopted to form a well pipe system which is directly penetrated into a finished well, and the construction process is as follows:
(1) The bottom cone drill bit 40 and sampling module for the third aquifer 66 are first installed on the ground 61, then the pressure cap 50 is installed and penetrated directly into the ground 61 by pressure.
(2) The pressure cap 50 is removed, then a sampling module for the second aquifer 64 is installed on the ground 61, and the pressure cap 50 is installed again, and the ground 61 is pressed again by direct penetration.
(3) The pressure cap 50 is removed, then the sampling modules for the submerged aquifer 62 are reinstalled on the ground 61, then the pressure cap 50 is installed and directly penetrated until the slotted main 11 of the main in each sampling module is within the predetermined respective aquifer.
Other technical solutions within the scope of the present invention can be fully realized by those skilled in the art according to the teachings of the present embodiment.
Claims (10)
1. A modular groundwater single well multilayer identification sampling system is characterized in that: the system comprises at least two sampling modules which are sequentially installed from bottom to top, wherein each sampling module comprises a main pipe, a secondary pipe which is internally arranged in the main pipe, a lower plugging layer (32) and an upper plugging layer (33);
the main pipe comprises a slotted main pipe (11), a water-stopping main pipe (12) and a main pipe blind pipe (13) which are sequentially connected from bottom to top, a slot (111) is formed in the pipe wall in the middle of the slotted main pipe (11), and a water-absorbing expansion material (121) is wrapped outside the water-stopping main pipe (12);
the secondary pipe comprises a secondary pipe filter pipe (21) and a secondary pipe blind pipe (22), and a filter seam (211) is arranged on the pipe wall of the secondary pipe filter pipe (21); the lower plugging layer (32), the secondary pipe filter tube (21) and the upper plugging layer (33) are sequentially arranged in the slotted main pipe (11) from bottom to top, and the secondary pipe filter tube (21) is positioned at the position of the slot (111); the hollow cavity surrounded by the secondary pipe main pipe (21), the slotted main pipe (11), the lower plugging layer (32) and the upper plugging layer (33) is filled with filter materials (31);
the upper end of the secondary pipe filter pipe (21) is connected with at least one secondary pipe blind pipe (22), and the secondary pipe blind pipe (22) extends upwards to the top of the main pipe blind pipe (13) of the uppermost sampling module; the upper blocking layer (33) of the sampling module and the lower blocking layers (32) and the upper blocking layers (33) of all the sampling modules above are respectively provided with a through hole for the secondary tube blind tube (22) to pass through.
2. The modular groundwater single well multilaminate identification sampling system of claim 1, wherein: the split main pipe (11) and the water stop main pipe (12), the water stop main pipe (12) and the main pipe blind pipe (13) of the downsampling module and the split main pipe (11) of the upsampling module are detachably connected in a threaded connection mode.
3. The modular groundwater single well multilaminate identification sampling system of claim 1, wherein: the secondary pipe filter pipes (21) and the secondary pipe blind pipes (22) and the adjacent secondary pipe blind pipes (22) are detachably connected in a threaded connection mode.
4. The modular groundwater single well multilaminate identification sampling system of claim 1, wherein: the system further includes a cone drill bit (40), the cone drill bit (40) being mounted to the lower end of the slotted main tube (11) of the lowermost sampling module.
5. The modular groundwater single well multilaminate identification sampling system of claim 4, wherein: the upper end of the cone drill bit (40) is detachably connected with the lower end of the slotted main pipe (11) in a threaded connection mode.
6. The modular groundwater single well multilaminate identification sampling system of claim 1, wherein: the system also comprises a pressure-bearing top cover (50), and the pressure-bearing top cover (50) is detachably arranged at the upper end of the main pipe blind pipe (13) in a threaded connection mode during construction.
7. The modular groundwater single well multilaminate identification sampling system of claim 6, wherein: the lower end face of the pressure-bearing top cover (50) is embedded with a rubber solid buffer plug (51).
8. The modular groundwater single well multilaminate identification sampling system of claim 1, wherein: the outside of the slot (111) of the slotted main pipe (11) is wrapped with a filter screen.
9. The modular groundwater single well multilaminate identification sampling system of claim 1, wherein: the lower end of a secondary pipe filter pipe (21) of the lowest sampling module is connected with a secondary pipe blind pipe (22) with a bottom cover, and a through hole for the secondary pipe blind pipe (22) to pass through is arranged on the lower plugging layer (32).
10. The modular groundwater single well multilaminate identification sampling system of claim 1, wherein: the lower plugging layer (32) and the upper plugging layer (32) are fixed on the slotted main pipe (11) through screws (112), and screw holes for the screws (112) to pass through are formed in the pipe wall of the slotted main pipe (11).
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| CN201710030178.4A CN106769206B (en) | 2017-01-17 | 2017-01-17 | Modularized underground water single-well multilayer identification sampling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108458901A (en) * | 2018-05-21 | 2018-08-28 | 中国地质调查局水文地质环境地质调查中心 | Separate zone stimulation system in a kind of underground water multilayer monitoring well |
| CN108982166A (en) * | 2018-06-29 | 2018-12-11 | 西安思坦科技有限公司 | A kind of sampled well casing programme based on Ground water Quality Survey |
| CN108956211B (en) * | 2018-09-25 | 2021-06-08 | 北京市环境保护科学研究院 | Underground water depth-setting sampling probe, sampling system using same and sampling method |
| CN109270235A (en) * | 2018-09-29 | 2019-01-25 | 南京万德斯环保科技股份有限公司 | A kind of segmented single-hole multi-channel monitoring well |
| CN114526950A (en) * | 2022-02-24 | 2022-05-24 | 中水北方勘测设计研究有限责任公司 | Underground water layering stagnant water sampling device |
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