CN108956211A - Ground water fixed depth sampling probe, sampling system and the method for sampling using the probe - Google Patents
Ground water fixed depth sampling probe, sampling system and the method for sampling using the probe Download PDFInfo
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- CN108956211A CN108956211A CN201811116334.XA CN201811116334A CN108956211A CN 108956211 A CN108956211 A CN 108956211A CN 201811116334 A CN201811116334 A CN 201811116334A CN 108956211 A CN108956211 A CN 108956211A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/16—Devices for withdrawing samples in the liquid or fluent state with provision for intake at several levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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Abstract
The invention discloses a kind of ground water fixed depth sampling probe, using the sampling system and the method for sampling of the probe, ground water fixed depth sampling probe includes: quick union；Top screw thread blocking cap, aperture is offered on the screw thread blocking cap of top, and quick union is arranged in tapping；Bottom end screw thread blocking cap；Inner liner, inner liner are set between top screw thread blocking cap and bottom end screw thread blocking cap, and multiple holes are provided on inner liner；And outer sleeve, outer sleeve are set between top screw thread blocking cap and bottom end screw thread blocking cap, and multiple holes are provided with including outer cover pipe sleeve outside portion's bushing pipe, on outer sleeve；Wherein, top screw thread blocking cap and bottom end screw thread blocking cap are linked together by inner liner and outer sleeve, and the diameter in multiple holes on outer sleeve is less than the diameter in multiple holes on inner liner；Wherein, quick union, top screw thread blocking cap, bottom end screw thread blocking cap, inner liner and outer sleeve are stainless steel material manufactures.
Description
Technical field
It is fixed especially with regard to a kind of underground water the present invention relates to contaminated site investigation and health risk assessment technology field
Deep sampling probe, sampling system and the method for sampling using the probe.
Background technique
With China " moving back two into three ", " garden Tui Chengjin ", " industry restructuring and upgrading " and accelerate the political affairs such as urbanization
The continuous of plan is implemented, and the manufacturing enterprise positioned at urban fringe area gradually shuts down resettlement originally, vacates and returns soil for urban construction.But
Be, because early stage environmental consciousness is weaker, Some Enterprises during production because environmental protection measure implements the factors such as not in place, to enterprises
Soil and groundwater causes a degree of pollution.To ensure the population health and life during such place redevelopment utilizes
State Environmental security, ecological environment portion, which is distinctly claimed, to carry out soil and groundwater pollution surveys to doubtful pollution plot, for true
Recognize polluted plot, need to further carry out risk assessment, and risk management and control is formulated according to risk evaluation result and is repaired with improvement
Compound case.
Therefore, the distribution for clearly finding out pollutant in soil and groundwater is to carry out risk assessment and establishment risk management and control
With the basis for administering recovery scenario.In view of the importance of pollution surveys result, foreign countries are currently suggested contaminated site resolution ratio tune
Look into the concept of (i.e. high-resolution is portrayed), the means such as integrated use field quick detection, physical prospecting, fluorescence quickly detect, in meter level
Scale finds out the spatial distribution of pollutant.Wherein, Stratified Sampling monitoring is realized to underground water, is external dirty for place underground water
Dye carries out the important means that high-resolution is portrayed.But by funds limited domestic relevant unit carry out site investigation during
It is limited in the setting of plane and vertical up-sampling point.Especially for the thicker place of aquifer, to save probing
The cost of shaft building, often only construction complete penetration of well carries out groundwater sample acquisition for numerous observation units, to characterize place underground water
Pollution situation.The screen casing of such monitoring well often runs through entire aquifer, thus the underground water acquired be represent be
The aggregate sample in entire water-bearing layer, practical pollution situation of the contaminant detection results often than underground water in stratum is obviously relatively low,
Pollutant can not clearly be characterized in the specific distribution in water-bearing layer and concentration Vertical Distribution Characteristics, it is difficult to be subsequent risk assessment
And the formulation of risk management and control and improvement recovery scenario provides strong support, and is also possible to lead to exaggerating for pollution range.
For this problem, though domestic have a small amount of unit to attempt the construction group Jing Huo Testis formula near the same monitoring point at present
Groundwater monitoring well builds multiple monitoring wells in same position, the installation site by designing each monitoring well screen casing is realized
Acquire the groundwater sample of different depth.But the shortcomings that this mode be the cost is relatively high, in-site installation shaft building when
Between the period it is long.Meanwhile because this mode generallys use the monitoring well well casing of outer diameter about 50mm, washed before leading into well well-flushing and sampling
A large amount of waste water is generated during well, duration of well flushing is longer.In addition, it is some containing in the fine grain stratum such as silt use this
Kind mode builds groundwater monitoring well, it tends to be difficult to reach the well-flushing requirement of associated specifications requirement.
It is difficult to realize high-resolution pollution for current domestic groundwater monitoring well shaft building to portray, the invention proposes one
The groundwater sampling system and the method for sampling that kind is portrayed for place underground water pollution high-resolution.This method has installation letter
The advantages that single, at low cost, well-flushing sampling process waste water yield is few, be very suitable for underground water buried depth pay, water-bearing layer it is thicker
Place underground water pollution spatial distribution portray process sample acquisition.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The purpose of the present invention is to provide a kind of ground water fixed depth sampling probe, use the sampling system and sampling of the probe
Method, the shortcomings that prior art can be overcome.
To achieve the above object, the present invention provides a kind of ground water fixed depth sampling probes, comprising: quick union；Top
Screw thread blocking cap, aperture is offered on the screw thread blocking cap of top, and quick union is arranged in tapping；Bottom end screw thread blocking cap；Inner liner,
Inner liner is set between top screw thread blocking cap and bottom end screw thread blocking cap, and multiple holes are provided on inner liner；And it is external
Casing, outer sleeve are set between top screw thread blocking cap and bottom end screw thread blocking cap, including outer cover pipe sleeve outside portion's bushing pipe, outside
Multiple holes are provided on parts casing pipe；Wherein, top screw thread blocking cap and bottom end screw thread blocking cap are by inner liner and outer sleeve
It links together, the diameter in multiple holes on outer sleeve is less than the diameter in multiple holes on inner liner；Wherein, it connects fastly
Head, top screw thread blocking cap, bottom end screw thread blocking cap, inner liner and outer sleeve are stainless steel material manufactures.
In a preferred embodiment, wherein quick union is 1/4 inch screw thread pneumatic joint；Aperture is 1/4 " spiral shell
The aperture of line；The wall thickness of inner liner is 1.5mm, diameter 22mm, is highly 60cm, 8 column holes, hole are provided on inner liner
Aperture be 4mm, pitch of holes 2mm；The wall thickness of outer sleeve is 0.4mm, diameter 24mm, is highly 60cm, outer sleeve
With 18 mesh apertures.
The present invention also provides a kind of groundwater sampling systems portrayed for place underground water pollution high-resolution, are used for
The groundwater sampling system that place underground water pollution high-resolution is portrayed includes ground water fixed depth sampling probe as the aforementioned, is used for
The groundwater sampling system that place underground water pollution high-resolution is portrayed further include: connecting tube, connecting tube for will impurely under
Water sample is guided to ground sample mouth out of ground water fixed depth sampling probe；Frequency conversion low flow velocity sampling apparatus, frequency conversion low flow velocity are adopted
Sampling device includes low flow velocity sampling pump and peristaltic pump silicon special sebific duct, and frequency conversion low flow velocity sampling apparatus is adopted for that will be mounted on design
Groundwater sample in the ground water fixed depth sampling probe of sample depth location is transferred in sample bottle；Normal hydration parameter is real-time
Monitoring system, normal hydration parameter real time monitoring system are connected to the water outlet of frequency conversion low flow velocity sampling apparatus, normal hydration
Parameter real time monitoring system is learned for reading underground water dissolved oxygen, temperature, conductivity, oxidation-reduction potential and pH reading in real time；
Well casing, well casing are mounted below ground 30cm between the above 50cm in ground, and pipe plug is stamped on well casing top, and well casing is provided with and connects
The drilling that pipe diameter is consistent；Raised platform around a well, raised platform around a well are used to protect well casing from extraneous destruction；Filtrate, filtrate are partial size and acquisition position
The similar cleaning quartz sand of stratum particle diameter distribution is set, cleaning quartz sand is installed on around ground water fixed depth sampling probe；And resistance
Every device, obstructing instrument is high density water uptake expansion material, and obstructing instrument is installed between ground water fixed depth sampling probe.
In a preferred embodiment, connecting tube is nylon material.
In a preferred embodiment, well casing material is stainless steel or chemical grade UPVC, diameter 110mm.
In a preferred embodiment, raised platform around a well uses obvious formula raised platform around a well, and raised platform around a well is poured using cement slurry, and cement slurry pours
Height 30cm.
The present invention also provides a kind of acquisition sides of groundwater sample portrayed for place underground water pollution high-resolution
Method, which is characterized in that acquisition method uses groundwater sampling system as the aforementioned, and acquisition method is the following steps are included: S1, monitoring
The probing of well wellhole；S2, shaft building, wherein shaft building further comprises following steps: it step 1, is drilled in fact before shaft building using tape measure
Border depth, and connecting tube and ground water fixed depth sampling probe are connected and fixed；Step 2, the ground water fixed depth connected is sampled
Probe installation extremely design sampling depth, and quartz sand is filled between ground water fixed depth sampling probe and casing by sand-guiding tube
Gap in；Step 3, water uptake expansion material is interior until projected depth by sand-guiding tube investment drilling；Step 4, step 2 is repeated
With step 3 until all ground water fixed depth sampling probes are respectively mounted and finish；Step 5, water uptake expansion material is added until absorbing water swollen
Swollen material is at the 30cm of ground aperture；Step 6, well casing is mounted in drilling, cement slurry is poured and builds up raised platform around a well；Step 7, will
The pipe plug for fixing connecting tube is covered on well casing；S3, polluted underground water well-flushing and sampling, polluted underground water well-flushing and sample into
One step includes the following steps: step 1, after at well 48 hours, according to place aquifer feature, adjusts suitable well-flushing
Flow velocity carries out well-flushing using frequency conversion low flow velocity sampling apparatus；Step 2, in washing well process, by normal hydration parameter real time monitoring
System is fixed on frequency conversion low flow velocity sampling apparatus water outlet, for reading underground water dissolved oxygen (DO), temperature, conductance in real time
Rate, oxidation-reduction potential (ORP) and pH reading, when underground water normal hydration parameter meets following multiple conditions, well-flushing knot
Beam: pH variation range is ± 0.1, and range of temperature is ± 3%, conductivity variations range be ± 3%, DO variation range for ±
10%, ORP variation range ± 10mV；Step 3, after well-flushing, using frequency conversion low flow velocity sampling apparatus to be not higher than 200mL/min's
Groundwater sample in the depthkeeping sampling probe for being mounted on projected depth is transferred in respective sample bottle by flow velocity.
In a preferred embodiment, when monitoring well wellhole is drilled, in conjunction with place earth formation, applicable brill is selected
It visits device and method and is drilled into designated depth, whole casing follow-up prevents borehole collapse.
In a preferred embodiment, wherein well-flushing volume calculation formula is as follows:
Wherein, VWell-flushingFor well-flushing volume, rCasingFor sleeve outer, h is quartz sand thickness, and ρ is quartz sand porosity.
In a preferred embodiment, wherein adding water uptake expansion material until water uptake expansion material is apart from ground
During at the 30cm of aperture, when adding water-swelling material, Jia Shui expands water-swelling material.
Compared with prior art, the present invention has the advantage that of the invention is used for place underground water pollution high-resolution
The acquisition method and acquisition system for the groundwater sample portrayed, which solve existing routine monitoring well, can not achieve stratified sampling, clump formula
The problems such as well is at high cost, nido well well construction technology is complicated.Sampling system Joining Technology of the invention is simple, technological operation feasibility
It is high, measure, be at low cost while can be realized individual well multichannel stratified sampling, can be realized sampling and normal hydration parameter,
Facilitate the spatial distribution of assessment place underground water pollutant, higher resolution portrays place conceptual model.
Detailed description of the invention
Fig. 1 is the schematic diagram that place underground water pollution of the invention is distributed that high-resolution portrays sampling system；
Fig. 2 is the schematic view of the front view of the ground water fixed depth sampling probe in the present invention；
Fig. 3 is the side structure schematic view of the ground water fixed depth sampling probe in the present invention；
Fig. 4 is the structural schematic diagram of the inner liner sieve of the ground water fixed depth sampling probe in the present invention；
Fig. 5 is the structural schematic diagram of the outer sleeve sieve of the ground water fixed depth sampling probe in the present invention；
Fig. 6 is the method for sampling flow diagram that place underground water pollution of the invention is distributed that high-resolution is portrayed；
Fig. 7 is the actual monitoring effect that place underground water pollution of the invention is distributed；
Main appended drawing reference explanation:
1- frequency conversion low flow velocity sampling apparatus, 2- normal hydration parameter real time monitoring system, 3- well casing, 4- pipe plug (have out
Hole), 5- raised platform around a well, 6- connecting tube, 7- obstructing instrument, 8- filtrate, 9- depthkeeping sampling probe, 10- quick union, the top 11- screwed plug
Cap (has aperture), the bottom end 12- screw thread blocking cap, 13- sampling probe outer sleeve, 14- sampling probe inner liner.
Specific embodiment
Hereinafter, depthkeeping sampling probe of the invention, place underground water pollution distribution high-resolution are described with reference to the accompanying drawings
Rate portrays the case study on implementation of sampling system and method.
The embodiment recorded herein is specific specific embodiment of the invention, for illustrating design of the invention,
Be it is explanatory and illustrative, should not be construed as the limitation to embodiment of the present invention and the scope of the invention.Except what is recorded herein
Outside embodiment, those skilled in the art can also based on the claim of this application book and specification disclosure of that using aobvious and
The other technical solutions being clear to, these technical solutions include using any obvious to making for the embodiment recorded herein
The technical solution of substitutions and modifications.
The attached drawing of this specification is schematic diagram, aids in illustrating design of the invention, it is schematically indicated the shape of each section
And its correlation.It note that for the ease of clearly showing the structure of each component of the embodiment of the present invention, between each attached drawing
Do not drawn according to identical ratio.Identical reference marker is for indicating identical part.
Fig. 1 is the schematic diagram that place underground water pollution of the invention is distributed that high-resolution portrays sampling system；Fig. 2 is this hair
The schematic view of the front view of ground water fixed depth sampling probe in bright；Fig. 3 is the ground water fixed depth sampling probe in the present invention
Side structure schematic view；Fig. 4 is the structural schematic diagram of the inner liner sieve of the ground water fixed depth sampling probe in the present invention；Figure
5 be the structural schematic diagram of the outer sleeve sieve of the ground water fixed depth sampling probe in the present invention.
As shown, ground water fixed depth sampling probe 9 includes: quick union 10；Top screw thread blocking cap 11, top screwed plug
Aperture is offered on cap, quick union is arranged in tapping；Bottom end screw thread blocking cap 12；Inner liner 14, inner liner is set to
Between top screw thread blocking cap and bottom end screw thread blocking cap, multiple holes are provided on inner liner；And outer sleeve 13, outer sleeve
It is set between top screw thread blocking cap and bottom end screw thread blocking cap, including outer cover pipe sleeve outside portion's bushing pipe, is arranged on outer sleeve
There are multiple holes.Wherein, top screw thread blocking cap and bottom end screw thread blocking cap are linked together by inner liner and outer sleeve,
The diameter in multiple holes on outer sleeve is less than the diameter in multiple holes on inner liner；Wherein, quick union, top screwed plug
Cap, bottom end screw thread blocking cap, inner liner and outer sleeve are stainless steel material manufactures.
In a preferred embodiment, wherein quick union is 1/4 inch screw thread pneumatic joint；Aperture is 1/4 " spiral shell
The aperture of line；The wall thickness of inner liner is 1.5mm, diameter 22mm, is highly 60cm, 8 column holes, hole are provided on inner liner
Aperture be 4mm, pitch of holes 2mm；The wall thickness of outer sleeve is 0.4mm, diameter 24mm, is highly 60cm, outer sleeve
With 18 mesh apertures.
The groundwater sampling system portrayed for place underground water pollution high-resolution includes ground water fixed depth as the aforementioned
Sampling probe 9, the groundwater sampling system portrayed for place underground water pollution high-resolution further include: connecting tube 6, connecting tube
For polluted underground water sample to be guided to ground sample mouth out of ground water fixed depth sampling probe；Frequency conversion low flow velocity sampling apparatus
1, frequency conversion low flow velocity sampling apparatus includes low flow velocity sampling pump and peristaltic pump silicon special sebific duct, and frequency conversion low flow velocity sampling apparatus is used for
Groundwater sample in the ground water fixed depth sampling probe for being mounted on design sampling depth position is transferred in sample bottle；It is conventional
Water chemistry parameter real time monitoring system 2, normal hydration parameter real time monitoring system are connected to frequency conversion low flow velocity sampling apparatus
Water outlet, normal hydration parameter real time monitoring system for reading underground water dissolved oxygen, temperature, conductivity, oxidation also in real time
Former current potential and pH reading；Well casing 3, well casing are mounted below ground 30cm between the above 50cm in ground, and pipe is stamped on well casing top
Stifled 4, well casing is provided with the drilling being consistent with 6 diameter of connecting tube；Raised platform around a well 5, raised platform around a well are used to protect well casing from extraneous destruction；Filtrate
8, filtrate is partial size cleaning quartz sand similar with acquisition position stratum particle diameter distribution, and cleaning quartz sand is installed on ground water fixed depth
Around sampling probe；And obstructing instrument 7, obstructing instrument are high density water uptake expansion material, obstructing instrument is installed on ground water fixed depth and takes
Between sample probe.
In a preferred embodiment, connecting tube is nylon material.
In a preferred embodiment, well casing material is stainless steel or chemical grade UPVC, diameter 110mm.
In a preferred embodiment, raised platform around a well uses obvious formula raised platform around a well, and raised platform around a well is poured using cement slurry, and cement slurry pours
Height 30cm.
Fig. 6 is the method for sampling flow diagram that place underground water pollution of the invention is distributed that high-resolution is portrayed.Such as figure
Shown, the present invention provides a kind of acquisition methods of groundwater sample portrayed for place underground water pollution high-resolution, adopt
Set method use groundwater sampling system as the aforementioned, acquisition method the following steps are included:
S1, the probing of monitoring well wellhole；
S2, shaft building, wherein shaft building further comprises following steps:
Step 1, using tape measure drilling actual depth before shaft building, and connecting tube and ground water fixed depth sampling probe are connected
Connect fixation；
Step 2, the ground water fixed depth sampling probe connected is installed to design sampling depth, and by quartz sand by leading
Sandpipe is filled in the gap between ground water fixed depth sampling probe and casing；
Step 3, water uptake expansion material is interior until projected depth by sand-guiding tube investment drilling；
Step 4, step 2 and step 3 are repeated until all ground water fixed depth sampling probes are respectively mounted and finish；
Step 5, water uptake expansion material is added until water uptake expansion material is at the 30cm of ground aperture；
Step 6, well casing is mounted in drilling, cement slurry is poured and builds up raised platform around a well；
Step 7, the pipe plug for fixing connecting tube is covered on well casing；
S3, polluted underground water well-flushing and sampling, polluted underground water well-flushing and sampling further comprise following steps:
Step 1, after at well 48 hours, according to place aquifer feature, suitable well-flushing flow velocity is adjusted, is used
Frequency conversion low flow velocity sampling apparatus carries out well-flushing；
Step 2, in washing well process, normal hydration parameter real time monitoring system is fixed on frequency conversion low flow velocity sampling apparatus
Water outlet, for reading underground water dissolved oxygen (DO), temperature, conductivity, oxidation-reduction potential (ORP) and pH reading in real time,
When underground water normal hydration parameter meets following multiple conditions, well-flushing terminates: pH variation range is ± 0.1, temperature change
Range is ± 3%, and conductivity variations range is that ± 3%, DO variation range is ± 10%, ORP variation range ± 10mV；
Step 3, after well-flushing, it will be mounted on using frequency conversion low flow velocity sampling apparatus with to be not higher than the flow velocity of 200mL/min and be set
The groundwater sample counted in the depthkeeping sampling probe of depth is transferred in respective sample bottle.
In a preferred embodiment, when monitoring well wellhole is drilled, in conjunction with place earth formation, applicable brill is selected
It visits device and method and is drilled into designated depth, whole casing follow-up prevents borehole collapse.
In a preferred embodiment, wherein well-flushing volume calculation formula is as follows:
Wherein, VWell-flushingFor well-flushing volume, rCasingFor sleeve outer, h is quartz sand thickness, and ρ is quartz sand porosity.
In a preferred embodiment, wherein adding water uptake expansion material until water uptake expansion material is apart from ground
During at the 30cm of aperture, when adding water-swelling material, Jia Shui expands water-swelling material.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (10)
1. a kind of ground water fixed depth sampling probe, which is characterized in that the ground water fixed depth sampling probe includes:
Quick union；
Top screw thread blocking cap, aperture is offered on the top screw thread blocking cap, and the quick union is arranged in the tapping；
Bottom end screw thread blocking cap；
Inner liner, the inner liner are set between the top screw thread blocking cap and the bottom end screw thread blocking cap, described interior
Multiple holes are provided on portion's bushing pipe；And
Outer sleeve, the outer sleeve are set between the top screw thread blocking cap and the bottom end screw thread blocking cap, described outer
Parts casing pipe covers outside the inner liner, and multiple holes are provided on the outer sleeve；
Wherein, the top screw thread blocking cap and the bottom end screw thread blocking cap are connected by the inner liner and the outer sleeve
It is connected together, the diameter in multiple holes on the outer sleeve is less than the diameter in multiple holes on the inner liner；
Wherein, the quick union, top screw thread blocking cap, bottom end screw thread blocking cap, inner liner and outer sleeve are by stainless
Steel material manufacture.
2. ground water fixed depth sampling probe as described in claim 1, which is characterized in that wherein, the quick union is 1/4 English
Screw thread pneumatic joint processed；" the aperture of screw thread that the aperture is 1/4；The wall thickness of the inner liner be 1.5mm, diameter 22mm,
Height is 60cm, and 8 column holes are provided on the inner liner, and the aperture in the hole is 4mm, pitch of holes 2mm；The outer cover
The wall thickness of pipe is 0.4mm, diameter 24mm, is highly 60cm, and the outer sleeve has 18 mesh apertures.
3. a kind of groundwater sampling system portrayed for place underground water pollution high-resolution, which is characterized in that described to be used for
The groundwater sampling system that place underground water pollution high-resolution is portrayed includes ground water fixed depth sampling as described in claim 1
Probe, the groundwater sampling system portrayed for place underground water pollution high-resolution further include:
Connecting tube, the connecting tube are used to polluted underground water sample being guided to ground out of described ground water fixed depth sampling probe
Sample tap；
Frequency conversion low flow velocity sampling apparatus, the frequency conversion low flow velocity sampling apparatus include low flow velocity sampling pump and peristaltic pump silica gel special
Pipe, the frequency conversion low flow velocity sampling apparatus are used to be mounted on the ground water fixed depth sampling probe of design sampling depth position
In groundwater sample be transferred in sample bottle；
Normal hydration parameter real time monitoring system, the normal hydration parameter real time monitoring system are connected to frequency conversion low flow velocity
The water outlet of sampling apparatus, the normal hydration parameter real time monitoring system in real time read underground water dissolved oxygen, temperature,
Conductivity, oxidation-reduction potential and pH reading；
Well casing, the well casing are mounted below ground 30cm between the above 50cm in ground, and pipe plug is stamped on the well casing top, institute
State the drilling that well casing is provided with connect pipe diameter and be consistent；
Raised platform around a well, the raised platform around a well are used to protect well casing from extraneous destruction；
Filtrate, the filtrate are partial size cleaning quartz sand similar with acquisition position stratum particle diameter distribution, the cleaning quartz sand
It is installed on around the ground water fixed depth sampling probe；And
Obstructing instrument, the obstructing instrument are high density water uptake expansion material, and the obstructing instrument is installed on ground water fixed depth sampling probe
Between.
4. the groundwater sampling system portrayed as claimed in claim 3 for place underground water pollution high-resolution, feature
It is, the connecting tube is nylon material.
5. the groundwater sampling system portrayed as claimed in claim 3 for place underground water pollution high-resolution, feature
It is, the well casing material is stainless steel or chemical grade UPVC, diameter 110mm.
6. the groundwater sampling system portrayed as claimed in claim 3 for place underground water pollution high-resolution, feature
It is, the raised platform around a well uses obvious formula raised platform around a well, and the raised platform around a well is poured using cement slurry, and cement slurry pours height 30cm.
7. a kind of acquisition method for the groundwater sample portrayed for place underground water pollution high-resolution, which is characterized in that institute
Acquisition method is stated using groundwater sampling system as described in one of claim 3-6, the acquisition method the following steps are included:
S1, the probing of monitoring well wellhole；
S2, shaft building, wherein the shaft building further comprises following steps:
Step 1, using tape measure drilling actual depth before shaft building, and connecting tube is connect admittedly with ground water fixed depth sampling probe
It is fixed；
Step 2, the ground water fixed depth sampling probe connected is installed to design sampling depth, and quartz sand is passed through into sand-guiding tube
It is filled in the gap between ground water fixed depth sampling probe and casing；
Step 3, water uptake expansion material is interior until projected depth by sand-guiding tube investment drilling；
Step 4, step 2 and step 3 are repeated until all ground water fixed depth sampling probes are respectively mounted and finish；
Step 5, water uptake expansion material is added until the water uptake expansion material is at the 30cm of ground aperture；
Step 6, well casing is mounted in drilling, cement slurry is poured and builds up raised platform around a well；
Step 7, the pipe plug for fixing connecting tube is covered on the well casing；
S3, polluted underground water well-flushing and sampling, the polluted underground water well-flushing and sampling further comprise following steps:
Step 1, after at well 48 hours, according to place aquifer feature, suitable well-flushing flow velocity is adjusted, frequency conversion is used
Low flow velocity sampling apparatus carries out well-flushing；
Step 2, in washing well process, normal hydration parameter real time monitoring system is fixed on the water outlet of frequency conversion low flow velocity sampling apparatus
It is local for reading underground water dissolved oxygen (DO), temperature, conductivity, oxidation-reduction potential (ORP) and pH reading in real time at mouthful
When being lauched the multiple conditions of normal hydration parameter satisfaction or less, well-flushing terminates: pH variation range is ± 0.1, range of temperature
It is ± 3%, conductivity variations range is that ± 3%, DO variation range is ± 10%, ORP variation range ± 10mV；
Step 3, after well-flushing, design will be mounted on deeply to be not higher than the flow velocity of 200mL/min using frequency conversion low flow velocity sampling apparatus
Groundwater sample in the depthkeeping sampling probe of degree is transferred in respective sample bottle.
8. acquisition method as claimed in claim 7, which is characterized in that in the probing of monitoring well wellhole, in conjunction with formation knot
Structure, selects applicable drilling equipment and method to be drilled into designated depth, and whole casing follow-up prevents borehole collapse.
9. acquisition method as claimed in claim 7, which is characterized in that wherein, well-flushing volume calculation formula is as follows:
Wherein, VWell-flushingFor well-flushing volume, rCasingFor sleeve outer, h is quartz sand thickness, and ρ is quartz sand porosity.
10. acquisition method as claimed in claim 7, which is characterized in that wherein, adding water uptake expansion material until the suction
During water-swelling material is at the 30cm of ground aperture, when adding water-swelling material, Jia Shui keeps the water-swelling material swollen
It is swollen.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811116334.XA CN108956211B (en) | 2018-09-25 | 2018-09-25 | Underground water depth-setting sampling probe, sampling system using same and sampling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811116334.XA CN108956211B (en) | 2018-09-25 | 2018-09-25 | Underground water depth-setting sampling probe, sampling system using same and sampling method |
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| CN108956211A true CN108956211A (en) | 2018-12-07 |
| CN108956211B CN108956211B (en) | 2021-06-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633118A (en) * | 2019-01-22 | 2019-04-16 | 中国环境科学研究院 | A kind of contaminated site aeration zone and underground water pollution method for early warning |
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| CN110031262A (en) * | 2019-03-28 | 2019-07-19 | 中国地质调查局水文地质环境地质调查中心 | A kind of low disturbance layered sampling device of low discharge and its method of sampling |
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| CN111257055A (en) * | 2020-03-19 | 2020-06-09 | 北京市环境保护科学研究院 | Portable underground water depth-setting sampling device, sampling system and sampling method |
| CN111257055B (en) * | 2020-03-19 | 2021-08-17 | 北京市环境保护科学研究院 | Portable underground water depth-setting sampling device, sampling system and sampling method |
| CN114541965A (en) * | 2020-11-25 | 2022-05-27 | 裕山环境工程股份有限公司 | Soil modification method suitable for environmental monitoring |
| CN114264507A (en) * | 2021-11-15 | 2022-04-01 | 中国科学院武汉岩土力学研究所 | Underground water sampling device, sampling method and installation method |
| CN114264507B (en) * | 2021-11-15 | 2024-02-13 | 中国科学院武汉岩土力学研究所 | Groundwater sampling device, sampling method and installation method |
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