CN212159191U - Integrated device for sampling soil gas and underground water at fixed depth - Google Patents
Integrated device for sampling soil gas and underground water at fixed depth Download PDFInfo
- Publication number
- CN212159191U CN212159191U CN202020502935.0U CN202020502935U CN212159191U CN 212159191 U CN212159191 U CN 212159191U CN 202020502935 U CN202020502935 U CN 202020502935U CN 212159191 U CN212159191 U CN 212159191U
- Authority
- CN
- China
- Prior art keywords
- sampling
- sealing cover
- hose connector
- pipeline
- soil gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model provides a depthkeeping soil gas and groundwater sampling integrated device, including sampling well and sampling head. The sampling well comprises a slotted pipe and a settling pipe. The sampling head comprises an upper sealing cover and a lower sealing cover, and is closely connected with the inner wall of the slotted pipe to form a sampling space; a lower drainage pipeline, an upper drainage pipeline, a sampling pipeline and a sampling rod are arranged downwards from a well mouth of the sampling well, the lower drainage pipeline hermetically penetrates through the upper sealing cover and the lower sealing cover, a water outlet is formed in the position, close to the top side of the upper sealing cover, of the upper drainage pipeline, and a sampling port is formed in the position, close to the top side of the lower sealing cover, of the sampling pipeline after the sampling pipeline penetrates through the upper sealing cover; through adopting the vacuum pump selectively with drain pipe, sample pipeline are linked together down, can realize transferring smoothly and lifting of sample head to soil gas and groundwater of setting for the degree of depth of accurate extraction carry out sampling analysis. The device has the advantages of simple structure, high construction speed, low cost, adjustable sampling depth and thickness and the like.
Description
Technical Field
The utility model relates to a soil and groundwater investigation sample technical field.
Background
The leakage and diffusion of pollutants in different organic pollution sites are greatly influenced by factors such as topography, geology, soil hydrology, pollutant characteristics and the like, and parameters such as underground water depth, soil layer permeability coefficient, liquid density of pollutants and the like directly determine occurrence states and distribution concentrations of the pollutants in the soil and underground water of the sites. Some pollutants have larger distribution difference at different burial depths.
The organic pollution fields in China are numerous, the difference of the pollution production industry is large, the hydrogeological conditions are different, and the soil gas and non-aqueous phase liquids (NAPLs, including light non-aqueous phase liquids (LNAPLs) at the upper layer, heavy non-aqueous phase liquids (DNAs) at the lower layer and groundwater at different depths need to be sampled and detected irregularly at different stages of investigation and treatment.
The existing sampling method for the soil gas and underground water at the fixed depth is easy to damage the soil structure, the device is complex, the construction difficulty is high, and the cost is high; a single sampling point can only sample a limited number of depths; the sampling depth is fixed, and the later stage can not be changed.
For example, CN 109975084 a discloses a soil gas layered sampling device and method, comprising a gas-collecting circular tube, wherein the top end of the gas-collecting circular tube is open, and the bottom end is sealed by a circular bottom plate; the upper part of the middle part of the circular gas production pipe is divided into two branch pipes with semicircular cross sections through a middle vertical partition plate, and the end part of one branch pipe is sealed through a semicircular partition plate; the end part of the vertical clapboard is fixed above the semicircular clapboard; a first gas production hole is formed in the end part of the gas production circular pipe above the circular bottom plate; and a second gas collecting hole is reserved at the end part of the branch pipe above the semicircular partition plate. Through sending into the well with sampling device, around the first gas production hole of the different degree of depth and second gas production hole, fill quartz sand respectively to between first gas production hole and second gas production hole and fill bentonite with sealing more than the second gas production hole, thereby make deep soil gas see through quartz sand and get into first gas production hole, shallow soil gas sees through quartz sand and gets into second gas production hole, realizes the layering sampling of different degree of depth soil gas. But the device has a complex structure and the materials are not easy to obtain; is influenced by the structure of the device and is not suitable for multi-depth sampling of a single sampling point; the sampling depth is not modifiable.
CN 110095308A discloses a sampling well system for organic pollution site investigation and long-term monitoring and a well construction method thereof. The monitoring well sequentially penetrates through a ground level, shallow surface soil, deep soil, light non-aqueous phase liquids (LNAPLs), a groundwater layer and heavy non-aqueous phase liquids (DNAPs) from top to bottom; forming a first water-resisting layer at the bottom of the monitoring well by using a first water-resisting layer which is partially damaged when the monitored well is excavated; a shallow surface soil gas sampling pump, a deep soil gas sampling pump, a light non-aqueous phase liquid (LNAPLs) sampling peristaltic pump, a shallow groundwater sampling peristaltic pump, a deep groundwater sampling peristaltic pump and a heavy non-aqueous phase liquid (DNAPLs) sampling peristaltic pump are respectively connected with a shallow surface soil gas sampling probe, a deep soil gas sampling probe, a light non-aqueous phase liquid (LNAPLs) sampling tube, a shallow groundwater sampling tube, a deep groundwater sampling tube and a heavy non-aqueous phase liquid (DNAPS) sampling tube through a shallow surface soil gas sampling tube, a deep soil gas sampling probe, a light non-aqueous phase liquid (LNAPLs) sampling probe, a shallow groundwater sampling probe, a deep groundwater sampling probe and a heavy non-aqueous phase liquid (DNAPS) sampling probe; the shallow surface soil gas sampling probe is arranged in the shallow surface soil; the deep soil gas sampling probe is arranged in the deep soil; a light non-aqueous phase liquid (LNAPLs) sampling probe is arranged on the light non-aqueous phase liquid (LNAPLs) layer; the shallow groundwater sampling probe is arranged in the shallow layer of the groundwater layer; the deep groundwater sampling probe is arranged in the deep layer of the groundwater layer; the heavy non-aqueous phase liquid (DNAs) sampling probe is arranged in the heavy non-aqueous phase liquid (DNAs) layer or a first water-resisting layer at the bottom of the monitoring well, wherein the first water-resisting layer is partially positioned at the lower liquid level of the heavy non-aqueous phase liquid (DNAs); the first coarse quartz sand layer is back filled around the heavy non-aqueous phase liquid (DNAPLS) sampling probe; a second coarse quartz sand layer is back-filled around the deep groundwater sampling probe, and a first fine quartz sand layer is back-filled between the first coarse quartz sand layer and the second coarse quartz sand layer; a third coarse quartz sand layer is back filled around the shallow groundwater sampling probe; a second fine quartz sand layer is back filled between the second coarse quartz sand layer and the third coarse quartz sand layer; a fourth coarse quartz sand layer is back filled around the light non-aqueous phase liquid (LNAPLs) sampling probe; a third fine quartz sand layer is back filled between the third coarse quartz sand layer and the fourth coarse quartz sand layer; a first bentonite layer is arranged on the upper part of the fourth coarse quartz sand layer; and (2) digging soil to the depth to be monitored at two sides around the finished monitoring well to arrange a deep soil gas sampling probe and a shallow soil gas sampling probe, backfilling a second bentonite layer under the deep soil gas sampling probe, backfilling a fifth coarse quartz sand layer around the deep soil gas sampling probe, backfilling a third bentonite layer under the shallow soil gas sampling probe, backfilling a sixth coarse quartz sand layer around the shallow soil gas sampling probe, and arranging a sleeve after backfilling the fourth bentonite layer in all the rest areas of the monitoring well, wherein the sleeve is exposed out of the ground to arrange a wall protection pipe and a well cover. However, the device has complex well construction process, causes soil structure damage, and has high construction difficulty and high cost; the sampling depth cannot be changed.
CN 209542214U then discloses an underground soil gas collection system, including gas collecting chamber, handle, top cap, piston, first sampling tube, bottom, check valve, aspiration pump and sample bag, the gas collecting chamber top is located to the top cap, the gas collecting chamber bottom is located to the bottom, the handle passes the top cap and locates inside the gas collecting chamber, the inside of handle bottom, gas collecting chamber is located to the piston, the external diameter of piston corresponds with the internal diameter of gas collecting chamber, the outside at handle top, gas collecting chamber is located to the handle, top cap top is located to first sampling tube, and one end is passed the top cap and is met with gas collecting chamber inside, and the other end and aspiration pump air inlet swing joint, sample bag and aspiration pump gas outlet are connected, and the department of meeting of first sampling tube and top cap is equipped with the check valve. The utility model discloses a device has can fix a position, depthkeeping sampling, realizes advantages such as soil long-term monitoring, simple structure and the accuracy height to fixed position department. However, the device cannot go deep into deep soil and is not suitable for sampling deep soil; is not suitable for long-term monitoring and sampling, and needs to be built repeatedly.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a depthkeeping loam gas and groundwater sampling integrated device, its purpose is solved that prior art exists: the soil structure is easy to damage, the device is complex, the construction difficulty is high, and the cost is high; the single sampling point can only sample limited depth, the sampling depth is fixed, and the sampling depth can not be changed in the later period.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a depthkeeping soil gas and groundwater sampling integrated device which characterized in that, includes sampling well and sampling head, wherein:
the sampling well mainly comprises a slotted pipe and a settling pipe, wherein the slotted range of the slotted pipe is matched with the sampling depth, and a filter screen is wrapped outside the slotted pipe; the settling tube is a seamless tube and is connected with the lower end of the slotted tube through threads;
the sampling head comprises an upper sealing cover and a lower sealing cover which are fixedly connected through a connecting rod, and the upper sealing cover and the lower sealing cover are tightly connected with the inner wall of the slotted pipe so as to form a sampling space between the upper sealing cover and the lower sealing cover;
by the well head of sampling well downwards be equipped with drain pipe, last drain pipe, sample pipeline and sample arm down, wherein: the lower drainage pipeline passes through the upper sealing cover and the lower sealing cover in a sealing manner and is used for draining soil gas or underground water below the lower sealing cover; the upper water drainage pipeline is provided with a water outlet at a position close to the top side of the upper sealing cover and used for draining soil gas or underground water above the upper sealing cover; the sampling pipeline penetrates through the upper sealing cover and is provided with a sampling port at a position close to the top side of the lower sealing cover for collecting soil gas or underground water in a sampling space; the sampling rod is connected with the sampling head and is used for controlling the lifting height of the sampling head in the sampling well;
the sampling device comprises a vacuum pump, a sampling pipeline and a vacuum pump, and is characterized by further comprising a vacuum pump and a collecting device, wherein the input end of the vacuum pump can be selectively communicated with the lower drainage pipeline, the upper drainage pipeline and the sampling pipeline, and the collecting device is connected with the output end of the vacuum pump.
The integrated device for sampling the soil gas and the underground water at fixed depth comprises: the upper sealing cover is provided with a first drainage hose connector penetrating through the upper side and the lower side, the lower sealing cover is provided with a third drainage hose connector penetrating through the upper side and the lower side, the first drainage hose connector is connected with the third drainage hose connector through a connecting hose, and then the first drainage hose connector is connected to the upper end of the first drainage hose connector to form the lower drainage pipeline.
The integrated device for sampling the soil gas and the underground water at fixed depth comprises: a second drainage hose connector is fixed on the upper side of the upper sealing cover, a laterally arranged water outlet is formed in the position, close to the upper sealing cover, of the second drainage hose connector, and the second drainage hose is connected to the upper end of the second drainage hose connector to form the upper drainage pipeline.
The integrated device for sampling the soil gas and the underground water at fixed depth comprises: the upper sealing cover is provided with a first sampling hose connector penetrating through the upper side and the lower side, a second sampling hose connector is fixed on the upper side of the lower sealing cover, the sampling hose connector is laterally arranged at a position, close to the lower sealing cover, of the second sampling hose connector, the first sampling hose connector is connected with the second sampling hose connector through a connecting hose, and then the first sampling hose is connected to the upper end of the first sampling hose connector to form the sampling pipeline.
The integrated device for sampling the soil gas and the underground water at fixed depth comprises: the sampling rod is fixedly connected with the upper end of the connecting rod through threads.
The integrated device for sampling the soil gas and the underground water at fixed depth comprises: the sampling rod is composed of a plurality of seamless steel pipes, and all the seamless steel pipes are connected through threads.
The depth-fixing soil gas and underground water sampling integrated device provided by the utility model has the advantages of simple structure, fast construction speed and low cost; the sampling depth is deep, and the sampling depth and the thickness can be changed at any time according to requirements; the method is suitable for long-term monitoring and sampling without repeated well construction; the multifunctional water-saving device has the advantages of multiple purposes, capability of being used for collecting soil water and soil gas and the like.
Drawings
FIG. 1 is a sectional view of the whole structure of the depth-fixed soil gas and groundwater sampling integrated device provided by the utility model;
FIGS. 2 and 3 are a top plan view and a cross-sectional view, respectively, of the upper seal cap;
fig. 4 and 5 are a plan view and a sectional view of the lower sealing cap, respectively.
Description of reference numerals: 1-a collecting device; 2-a hose; 3-a vacuum pump; 4-a hose; 5, a first drainage hose; 6-a second drainage hose; 7-a sampling hose; 8-slotted tube; 9-a sampling rod; 10-upper sealing cover; 11-lower sealing cap; 12-a settling tube; 13-a connecting rod; 14-connecting a hose; 15-drainage hose connector I; 16-sampling hose interface one; 17-a second drainage hose connector; 18-a drain outlet; 19-a third drainage hose connector; 20-sampling hose connector II; 21-sampling port.
Detailed Description
Fig. 1 is a sectional view of the whole structure of the depth-fixed soil gas and groundwater sampling integrated device provided by the present invention, which is introduced with reference to fig. 1-5, the construction method of the present invention is as follows:
a. well construction
Forming holes: according to the stratum condition, a water drill, a percussion drill or a rotary drilling machine is adopted for forming holes, the diameter of each formed hole is larger than that of the slotted pipe 8, so that the pipe laying and the backfilling of filter materials are facilitated, and the depth of each formed hole extends downwards by more than 1 meter at the deepest sampling point.
Tube laying: firstly, a sedimentation pipe 12 is arranged, and the sedimentation pipe 12 is a seamless pipe and is 1m long; and then opening the slotted pipe 8, axially slotting for 1mm wide, determining the length of the slotted pipe 8 according to the sampling depth, and wrapping two layers of 40-mesh nylon nets (or filter screens in other forms for preventing silt from entering the slotted pipe 8) outside the slotted pipe 8. The slotted pipe 8 and the settling pipe 12 are connected in series through threads.
Backfilling a filter material: and adding a 50mm artificial sand filling layer around the well pipe.
And (3) sealing: the hole opening at the uppermost end of the outer side of the split pipe is sealed and filled with common cohesive soil or cement mortar, the depth is 300mm, and ground rainwater is prevented from entering the well along the split pipe.
Well flushing: and (3) washing the well by adopting a piston method or other methods to wash the well pipe.
After the well is formed, the well pipe is sealed by a cover, so that rainwater and sundries are prevented from entering the well.
b. Installing a sampling head:
the sampling head comprises an upper sealing cover 10 and a lower sealing cover 11 with the thickness of 10mm, the central positions of the upper sealing cover 10 and the lower sealing cover 11 are fixedly connected through a connecting rod 13, the length of the connecting rod 13 is determined according to the thickness of a sampling soil layer, and the upper sealing cover 10 and the lower sealing cover 11 are tightly connected with the inner wall of the slotted pipe 8 in a sealing manner so as to form a sampling space between the upper sealing cover 10 and the lower sealing cover 11;
a first drainage hose connector 15 and a first sampling hose connector 16 which penetrate through the upper side and the lower side of the upper sealing cover 10 are arranged on the upper sealing cover 10, a second drainage hose connector 17 is fixed on the upper side of the upper sealing cover 10, and a lateral water outlet 18 is arranged at the position, close to the upper sealing cover 10, of the second drainage hose connector 17;
a third drainage hose connector 19 (the lower end of which extends out about 0.5 m) penetrating through the upper side and the lower side of the lower sealing cover 11 is arranged on the lower sealing cover 11, a second sampling hose connector 20 is fixed on the upper side of the lower sealing cover 11, and a lateral sampling port 21 is arranged at the position, close to the lower sealing cover 11, of the second sampling hose connector 20;
the first drainage hose connector 15 is connected with the third drainage hose connector 19 through a connecting hose 14, and then the first drainage hose 5 is connected to the upper end of the first drainage hose connector 15 (so as to form a lower drainage pipeline), so that water liquid (or soil gas) below the lower sealing cover 11 can be drained, and a sampling head can be conveniently placed down (the sampling pipe is not used for a long time, much water exists in the sampling pipe, and the lower drainage pipeline is used for draining accumulated water in the sampling pipe, so that the sampling head can be smoothly placed down);
a second drainage hose 6 is connected to the upper end of the second drainage hose connector 17 (to form an upper drainage pipeline), so that water liquid (or soil gas) above the upper sealing cover 11 can be discharged, the sampling head can be lifted conveniently (the sampling time is long, or groundwater is large, so that the upper part of the sampling head is filled with water, when the sampling is deep, the resistance of the upper water is very large, and the sampling head can be discharged after the water above the sampling head is discharged firstly);
the first sampling hose connector 16 is connected with the second sampling hose connector 20 through another connecting hose 14, and then the sampling hose 7 is connected to the upper end of the first sampling hose connector 16 (to form a sampling pipeline), so that water liquid (or soil gas) in the sampling space can be pumped out and pumped to the collecting device 1 on the ground through the vacuum pump 3.
In addition, a sampling rod 9 is inserted from the wellhead, the sampling rod 9 is tightly connected with the upper end of a connecting rod 13 at the central position of an upper sealing cover 10 through threads, so that a sampling head can be pulled to move up and down in the slotted pipe 8, and the requirements of different sampling depths are met; in this embodiment, the thief rod 9 comprises the long seamless steel pipe of a plurality of sections 1.5m, through threaded connection between each section, adopts the mode that the multistage is connected, can satisfy the different degree of depth requirements to it is more convenient to carry.
c. Sampling:
the sampling head is lowered to a specified depth through the sampling rod 9 (if the water quantity in the slit pipe 8 is large or the sampling head is difficult to lower due to gas compression, the drainage hose 5 is connected with the vacuum pump 3, water or gas in the slit pipe 8 is pumped out through the vacuum pump 3), then the sampling hose 7 is connected with the vacuum pump 3, and the water or gas in the slit pipe 8 is pumped out through the vacuum pump 3; after standing for a period of time, the vacuum pump 3 is connected to the collection device 1, the vacuum pump 3 is turned on again, and soil water or soil gas of a specified depth (i.e., in the sampling space) enters the collection device 1 and is used for monitoring.
After sampling is finished, the second drainage hose 6 is connected to the vacuum pump 3, water on the upper portion of the sampling head in the slit pipe 8 is pumped out through the vacuum pump 3, and the sampling head is easier to take out of the slit pipe 8 after resistance is reduced.
Therefore, the depth-fixed soil gas and underground water sampling integrated device provided by the utility model has the advantages of simple structure, fast construction speed and low cost; the sampling depth is deep, and the sampling depth and the thickness can be changed at any time according to requirements; the method is suitable for long-term monitoring and sampling without repeated well construction; the multifunctional water-saving device has the advantages of multiple purposes, capability of being used for collecting soil water and soil gas and the like.
Claims (6)
1. The utility model provides a depthkeeping soil gas and groundwater sampling integrated device which characterized in that, includes sampling well and sampling head, wherein:
the sampling well mainly comprises a slotted pipe and a settling pipe, wherein the slotted range of the slotted pipe is matched with the sampling depth, and a filter screen is wrapped outside the slotted pipe; the settling pipe is a seamless pipe and is connected with the lower end of the slotted pipe through threads;
the sampling head comprises an upper sealing cover and a lower sealing cover which are fixedly connected through a connecting rod, and the upper sealing cover and the lower sealing cover are tightly connected with the inner wall of the slotted pipe so as to form a sampling space between the upper sealing cover and the lower sealing cover;
by the well head of sampling well downwards be equipped with drain pipe, last drain pipe, sample pipeline and sample arm down, wherein: the lower drainage pipeline passes through the upper sealing cover and the lower sealing cover in a sealing manner and is used for draining soil gas or underground water below the lower sealing cover; the upper water drainage pipeline is provided with a water outlet at a position close to the top side of the upper sealing cover and used for draining soil gas or underground water above the upper sealing cover; the sampling pipeline penetrates through the upper sealing cover and is provided with a sampling port at a position close to the top side of the lower sealing cover for collecting soil gas or underground water in a sampling space; the sampling rod is connected with the sampling head and is used for controlling the lifting height of the sampling head in the sampling well;
the sampling device comprises a vacuum pump, a sampling pipeline and a vacuum pump, and is characterized by further comprising a vacuum pump and a collecting device, wherein the input end of the vacuum pump can be selectively communicated with the lower drainage pipeline, the upper drainage pipeline and the sampling pipeline, and the collecting device is connected with the output end of the vacuum pump.
2. The integrated depth soil gas and groundwater sampling device as recited in claim 1, wherein: the upper sealing cover is provided with a first drainage hose connector penetrating through the upper side and the lower side, the lower sealing cover is provided with a third drainage hose connector penetrating through the upper side and the lower side, the first drainage hose connector is connected with the third drainage hose connector through a connecting hose, and then the first drainage hose connector is connected to the upper end of the first drainage hose connector to form the lower drainage pipeline.
3. The integrated depth soil gas and groundwater sampling device as recited in claim 1, wherein: a second drainage hose connector is fixed on the upper side of the upper sealing cover, a laterally arranged water outlet is formed in the position, close to the upper sealing cover, of the second drainage hose connector, and the second drainage hose is connected to the upper end of the second drainage hose connector to form the upper drainage pipeline.
4. The integrated depth soil gas and groundwater sampling device as recited in claim 1, wherein: the upper sealing cover is provided with a first sampling hose connector penetrating through the upper side and the lower side, a second sampling hose connector is fixed on the upper side of the lower sealing cover, the sampling hose connector is laterally arranged at a position, close to the lower sealing cover, of the second sampling hose connector, the first sampling hose connector is connected with the second sampling hose connector through a connecting hose, and then the first sampling hose is connected to the upper end of the first sampling hose connector to form the sampling pipeline.
5. The integrated depth soil gas and groundwater sampling device as recited in claim 1, wherein: the sampling rod is fixedly connected with the upper end of the connecting rod through threads.
6. The integrated depth soil gas and groundwater sampling device as recited in claim 1, wherein: the sampling rod is composed of a plurality of seamless steel pipes, and all the seamless steel pipes are connected through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020502935.0U CN212159191U (en) | 2020-04-07 | 2020-04-07 | Integrated device for sampling soil gas and underground water at fixed depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020502935.0U CN212159191U (en) | 2020-04-07 | 2020-04-07 | Integrated device for sampling soil gas and underground water at fixed depth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212159191U true CN212159191U (en) | 2020-12-15 |
Family
ID=73725236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020502935.0U Active CN212159191U (en) | 2020-04-07 | 2020-04-07 | Integrated device for sampling soil gas and underground water at fixed depth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212159191U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881109A (en) * | 2021-01-22 | 2021-06-01 | 上海建科环境技术有限公司 | High-precision soil gas single-hole multilayer sampling device |
-
2020
- 2020-04-07 CN CN202020502935.0U patent/CN212159191U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881109A (en) * | 2021-01-22 | 2021-06-01 | 上海建科环境技术有限公司 | High-precision soil gas single-hole multilayer sampling device |
| CN112881109B (en) * | 2021-01-22 | 2023-04-18 | 上海建科环境技术有限公司 | High-precision soil gas single-hole multilayer sampling device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111426512A (en) | Integrated device for sampling soil gas and underground water at fixed depth | |
| CN101246094B (en) | Gravity flow type farmland underground leaching liquor collecting device | |
| CN101261201B (en) | Natural state soil leachate collecting method | |
| CN106192971B (en) | A kind of artesian water water-level observation well construction and the method for multilayer water-level observation | |
| KR101701956B1 (en) | Multipurpose-multidepth monitoring structure and installation method thereof | |
| CN109736338A (en) | A kind of hydraulic engineering foundation pit pipe well combination light well point Yield rainfall relation method | |
| CN105369812B (en) | The pressure water head of foundation ditch pumping with constant rate determines method under suspension type water-stop curtain | |
| CN102704488A (en) | Novel soft soil foundation pit excavation method | |
| CN113866384A (en) | Detachable soil column soil water and solute transport testing device and method | |
| CN107130580A (en) | New independent well point integrate draining combined vacuum ground preloading method and hardened system | |
| CN212159191U (en) | Integrated device for sampling soil gas and underground water at fixed depth | |
| CN201785761U (en) | Water-gas separation integrated tube well | |
| CN110453699B (en) | Drainage slide-resistant pile structure of 'rice' -shaped pile core and construction method thereof | |
| KR100299417B1 (en) | Apparatus for gathering water per section of water level of underground water and method for gathering water | |
| CN201196609Y (en) | Gravity flow type farmland underground leaching liquor collecting device | |
| CN101261262B (en) | Soil eluviation in situ detection method | |
| CN114264507B (en) | Groundwater sampling device, sampling method and installation method | |
| CN103308351B (en) | A kind of underground eluviation in-situ gathering-device with plastic border | |
| CN203007963U (en) | Ultra-high vacuum double-pipe drained well at low-permeability silt clay course | |
| CN216082180U (en) | Fixed-depth sampling monitoring well in thick sandy aquifer | |
| CN214116706U (en) | Shallow groundwater level quality of water observation well structure | |
| CN205581667U (en) | Accurate controlling means of trial zone ground water level | |
| CN110878557B (en) | Layered bidirectional drainage method for foundation pit dewatering | |
| CN210665734U (en) | Experimental field soil leaching in-situ layered collection device | |
| CN113753981A (en) | Fourth series underground water and soil pollution treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |