CN109490150A - Heterogeneous soils hole predominant current simulation experiment method and device - Google Patents
Heterogeneous soils hole predominant current simulation experiment method and device Download PDFInfo
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- CN109490150A CN109490150A CN201910077949.4A CN201910077949A CN109490150A CN 109490150 A CN109490150 A CN 109490150A CN 201910077949 A CN201910077949 A CN 201910077949A CN 109490150 A CN109490150 A CN 109490150A
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- 239000002689 soil Substances 0.000 title claims abstract description 66
- 238000004088 simulation Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000012360 testing method Methods 0.000 claims abstract description 44
- 239000011159 matrix material Substances 0.000 claims abstract description 36
- 239000000706 filtrate Substances 0.000 claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229920000742 Cotton Polymers 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000001764 infiltration Methods 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000012263 liquid product Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 abstract description 5
- 238000011160 research Methods 0.000 abstract description 3
- 239000003673 groundwater Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/0813—Measuring intrusion, e.g. of mercury
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/0846—Investigating permeability, pore-volume, or surface area of porous materials by use of radiation, e.g. transmitted or reflected light
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention provides heterogeneous soils hole predominant current simulation experiment method and devices, belong to study of groundwater field.It include: inlet tank, switch, Markov bottle, test earth pillar chamber, liquid-collecting bottle, check valve, soil matrix filtrate water collector, hole filtrate water collector, check-valves, recovery tank.A kind of heterogeneous soils hole predominant current simulation experiment method and device proposed by the present invention, structure is simple, can piecemeal dismounting, it is convenient to operate, hole predominant current is studied by the variation and distribution characteristics of observation soil moisture and pore water pressure, there is reference significance to predominant current theoretical research and engineering practice.
Description
Technical field
Heterogeneous soils hole predominant current simulation experiment method and device of the present invention pass through observation soil moisture and pore water pressure
The variation of power and distribution characteristics study hole predominant current, belong to study of groundwater field.
Background technique
Special heterogeneity is important one of the attribute of soil.Predominant current caused by the soil as caused by hole is heterogeneous is one
The common soil water movement form of kind.The presence of predominant current in heterogeneous soils reduces the available of soil moisture and nutrient
Property, a possibility that soil matrix corrodes is increased, the risk of underground water pollution is increased.Accurate description and simulation soil advantage
The spatial-temporal characteristics of stream are one of the difficulties of Soil Hydrological educational circles.It is generally believed that soil matrix stream meets Darcy's law,
But there is presently no form unified understanding for the movement mechanism of Preferential Flow in Soil with the presence of macrovoid.The present invention
A kind of heterogeneous soils hole predominant current simulation experiment method and device are proposed, observation soil moisture and pore water pressure are passed through
Change with distribution characteristics and study hole predominant current, there is reference significance to predominant current theoretical research and engineering practice.
Summary of the invention
It is an object of the invention to open heterogeneous soils hole predominant current simulation experiment method and devices, observe soil moisture
With the variation and distribution characteristics of pore water pressure.
Heterogeneous soils hole predominant current simulation test device includes inlet tank, switch, Markov bottle, test soil from top to bottom
Column chamber, liquid-collecting bottle, check valve, soil matrix filtrate water collector, hole filtrate water collector, check-valves, recovery tank；
Above-mentioned Markov bottle water outlet terminates at the even bleed-through road input end in test earth pillar chamber, even infiltration channel outlet and one
A liquid-collecting bottle input end connects, and test earth pillar chamber outlet end is connected with another liquid-collecting bottle input end, and liquid-collecting bottle outlet end connects
Check valve is connect, the water body in earth pillar chamber is tested and flows into soil matrix filtrate water collector, the water body in even bleed-through road flows into hole filter
Liquid water collector, two check-valves are connect respectively in the outlet end of soil matrix filtrate water collector and hole filtrate water collector, recovery tank
Entrance is connected to the end of two check-valves, and is fixed on iron stand；Video camera is set up in the middle part of above-mentioned iron stand.
Above-mentioned inlet tank is supplied water by conduit to Markov bottle；Markov bottle provides constant head to test earth pillar chamber；
Above-mentioned test earth pillar chamber is height 100cm, and the semicolumn cavity of diameter 30cm tests the intracavitary filling soil of earth pillar
Matrix；
Pressure sensor, moisture sensor are installed in above-mentioned soil matrix；
Filter grid is arranged in above-mentioned test earth pillar bottom of chamber portion；
The intracavitary even bleed-through road of setting of above-mentioned test earth pillar；
Above-mentioned even bleed-through road is internal diameter 1.8cm, the semi- cylindrical pvc pipe of outer diameter 2.0cm wall thickness 0.2mm, semi- cylindrical
Pvc pipe inner-wall spraying 0.1mm polyurethane vinyl；It is 92% drainage cotton, semicolumn that voidage is uniformly filled in semi- cylindrical pvc pipe
The permeable cotton that permeability rate is 2.2mL/min is surrounded on the outside of type pvc pipe；
Aperture, hole diameter 1mm, spacing 2mm are full of on above-mentioned semi- cylindrical pvc pipe；
Above-mentioned cylindrical type pvc pipe side insertion test earth pillar chamber plane cavity side, and with test earth pillar chamber planar cavity
It is bonded between body using tetrafluoroethene；
The test method includes the following contents:
1) soil matrix is subjected to basification: by closed check valve, using 12% NaHCO3Solution is passed through test soil
Column chamber maintains 24 hours；Check valve is opened, is oozed out 24 hours；
2) it is full of 2% phenolphthalein solution in inlet tank, starts to be tested；
3) motion process of the camera record phenolphthalein solution in soil matrix is used, is existed by video signal analysis predominant current
Depth and the coverage to soil matrix are infiltrated in soil matrix；
4) soil matrix filtrate and hole filtrate body are recorded by soil matrix filtrate water collector and hole filtrate water collector
Product changes with time.
5) parametric inversion is carried out using axisymmetric Richard equation, reflects the kinetic characteristic of predominant current.
In above formula, θ is volumetric water content, and h is pressure head, and t is the time, and r is radial coordinate, and z is vertical coordinate, and K is
Unsaturated hydraulic conductivity.
The relationship of the unsaturated hydraulic conductivity, volumetric water content and the pressure head that refer in above-mentioned Richards equation uses
VG-M model is described:
In above formula, θ r is residual water content；θ s is saturated aqueous rate；KS is saturated hydraulic conductivity；M, n, α are empirical coefficient, m
=1-1/n.
A kind of heterogeneous soils hole predominant current simulation experiment method and device proposed by the present invention, structure is simple, can piecemeal
Dismounting, it is convenient to operate, and studies hole predominant current by the variation and distribution characteristics of observation soil moisture and pore water pressure, right
Predominant current theoretical research and engineering practice have reference significance.
Detailed description of the invention
Fig. 1 is single unit system schematic diagram of the present invention；
Fig. 2 is present invention test earth pillar cavity segment schematic diagram；
Fig. 3 is present invention test earth pillar schematic cross-section；
Fig. 4 is the even infiltration access diagram of the present invention.
Specific embodiment
A specific embodiment of the invention is described with reference to the drawings.
As shown in Figure 1, heterogeneous soils hole predominant current simulation test device, includes inlet tank 1, switch 2, horse from top to bottom
Family name's bottle 3, test earth pillar chamber 6, liquid-collecting bottle 7, check valve 8, soil matrix filtrate water collector 10, hole filtrate water collector 11, non-return
Valve 12, recovery tank 13；The Markov bottle 3 is discharged the even bleed-through road input end terminated in test earth pillar chamber 6, and even bleed-through is said
Mouth end and 7 input end of liquid-collecting bottle connect, and test 6 outlet end of earth pillar chamber is connected with another 7 input end of liquid-collecting bottle, liquid-collecting bottle
7 outlet ends are all connected with check valve 8, the water body inflow soil matrix filtrate water collector 10 in test earth pillar chamber 6, in even bleed-through road
Water body flows into hole filtrate water collector 11, and two check-valves 12 are connect respectively in soil matrix filtrate water collector 10 and hole filtrate collection
The outlet end of hydrophone 11,13 entrance of recovery tank is connected to the end of two check-valves 12, and is fixed on iron stand 9；Above-mentioned
Video camera 4 is set up in the middle part of iron stand 9.
Above-mentioned inlet tank 1 is supplied water by conduit to Markov bottle 3；Markov bottle 3 provides constant head to test earth pillar chamber 6
61。
Above-mentioned test earth pillar chamber 6 is height 100cm, the semicolumn cavity of diameter 30cm, the interior filling soil of test earth pillar chamber 6
Earth matrix 64；
Pressure sensor 62, moisture sensor 63 are installed in above-mentioned soil matrix 64；
Filter grid 65 is arranged in above-mentioned 6 bottom of test earth pillar chamber；
The even bleed-through road of setting in above-mentioned test earth pillar chamber 6；
Above-mentioned even bleed-through road is internal diameter 1.8cm, the semi- cylindrical pvc pipe 51 of outer diameter 2.0cm wall thickness 0.2mm, semicolumn
51 inner-wall spraying 0.1mm polyurethane vinyl of type pvc pipe；It is 92% drainage cotton that voidage is uniformly filled in semi- cylindrical pvc pipe 51,
The permeable cotton 53 that permeability rate is 2.2mL/min is surrounded on the outside of semi- cylindrical pvc pipe 51；
Aperture 52, aperture 52 diameter 1mm, spacing 2mm are full of on above-mentioned semi- cylindrical pvc pipe 51；
Above-mentioned 51 side of cylindrical type pvc pipe insertion test 6 plane cavity side of earth pillar chamber, and it is flat with test earth pillar chamber 6
It is bonded between the cavity of face using tetrafluoroethene；
Above-mentioned device workflow is as follows:
1) soil matrix 64 is subjected to basification: check valve 8 is closed, using 12% NaHCO3Solution is passed through test
Earth pillar chamber 6 maintains 24 hours；Check valve 8 is opened, is oozed out 24 hours；
2) it is full of 2% phenolphthalein solution in inlet tank 1, starts to be tested；
3) motion process of the phenolphthalein solution in soil matrix 64 is recorded with video camera 4, passes through video signal analysis advantage
Stream infiltrates depth and the coverage to soil matrix 64 in soil matrix 64；
4) soil matrix filtrate and hole filter are recorded by soil matrix filtrate water collector 10 and hole filtrate water collector 11
Liquid product changes with time；
5) parametric inversion is carried out using axisymmetric Richard equation, reflects the kinetic characteristic of predominant current；
In above formula, θ is volumetric water content, and h is pressure head, and t is the time, and r is radial coordinate, and z is vertical coordinate, and K is
Unsaturated hydraulic conductivity；
The relationship of the unsaturated hydraulic conductivity, volumetric water content and the pressure head that refer in above-mentioned Richards equation uses
VG-M model is described:
In above formula, θ r is residual water content；θ s is saturated aqueous rate；KS is saturated hydraulic conductivity；M, n, α are empirical coefficient, m
=1-1/n.
Claims (5)
1. heterogeneous soils hole predominant current simulation test device, it is characterised in that: from top to bottom include inlet tank (1), switch
(2), Markov bottle (3), test earth pillar chamber (6), liquid-collecting bottle (7), check valve (8), soil matrix filtrate water collector (10), hole filter
Liquid water collector (11), check-valves (12), recovery tank (13)；Markov bottle (3) water outlet terminates in test earth pillar chamber (6)
Even bleed-through road input end, even infiltration channel outlet and liquid-collecting bottle (7) input end connect, test earth pillar chamber (6) outlet end with
Another liquid-collecting bottle (7) input end is connected, and liquid-collecting bottle (7) outlet end is all connected with check valve (8), the water in test earth pillar chamber (6)
Body flows into soil matrix filtrate water collector (10), and the water body in even bleed-through road flows into hole filtrate water collector (11), two non-returns
Valve (12) is connect respectively in the outlet end of soil matrix filtrate water collector (10) and hole filtrate water collector (11), and recovery tank (13) enters
Mouth is connected to the end of two check-valves (12), and is fixed on iron stand (9)；Camera shooting is set up in the middle part of above-mentioned iron stand (9)
Machine (4).
2. heterogeneous soils hole predominant current simulation test device according to claim 1, it is characterised in that: above-mentioned water inlet
Case (1) is supplied water by conduit to Markov bottle (3)；Markov bottle (3) provides constant head (61) to test earth pillar chamber (6).
3. heterogeneous soils hole predominant current simulation test device according to claim 1, it is characterised in that: above-mentioned test
Earth pillar chamber (6) is height 100cm, and the semicolumn cavity of diameter 30cm tests earth pillar chamber (6) interior filling soil matrix (64)；On
Pressure sensor (62), moisture sensor (63) are installed in the soil matrix (64) stated；Above-mentioned test earth pillar chamber (6) bottom
It is arranged filter grid (65)；The even bleed-through road of setting in above-mentioned test earth pillar chamber (6).
4. heterogeneous soils hole predominant current simulation test device according to claim 1, it is characterised in that: above-mentioned even infiltration
Channel is internal diameter 1.8cm, the semicolumn pvc pipe (51) of outer diameter 2.0cm wall thickness 0.2mm, semi- cylindrical pvc pipe (51) inner-wall spraying
0.1mm polyurethane vinyl；It is 92% drainage cotton, semi- cylindrical pvc pipe that voidage is uniformly filled in semi- cylindrical pvc pipe (51)
(51) outside surrounds the permeable cotton (53) that permeability rate is 2.2mL/min；Aperture is full of on the semi- cylindrical pvc pipe (51)
(52), aperture (52) diameter 1mm, spacing 2mm；Described semi- cylindrical pvc pipe (51) side insertion test earth pillar chamber (6) plane
Cavity side, and it is Nian Jie using tetrafluoroethene between test earth pillar chamber (6) plane cavity.
5. heterogeneous soils hole predominant current simulator according to claim 1, it is characterised in that: use claim 1
The method that the device is tested includes following below scheme:
1) soil matrix (64) are subjected to basification: check valve (8) are closed, using 12% NaHCO3Solution is passed through test
Earth pillar chamber (6) maintains 24 hours；Check valve (8) are opened, are oozed out 24 hours；
2) it is full of 2% phenolphthalein solution in inlet tank (1), starts to be tested；
3) motion process with video camera (4) record phenolphthalein solution in soil matrix (64), passes through video signal analysis advantage
Stream infiltrates depth and the coverage to soil matrix (64) in soil matrix (64)；
4) soil matrix filtrate and hole filter are recorded by soil matrix filtrate water collector (10) and hole filtrate water collector (11)
Liquid product changes with time.
5) parametric inversion is carried out using axisymmetric Richard equation, reflects the kinetic characteristic of predominant current:
In above formula, θ is volumetric water content, and h is pressure head, and t is the time, and r is radial coordinate, and z is vertical coordinate, and K is non-full
And hydraulic conductivity；
The relationship of the unsaturated hydraulic conductivity, volumetric water content and the pressure head that refer in above-mentioned Richards equation uses VG-M mould
Type is described:
In above formula, θ r is residual water content；θ s is saturated aqueous rate；KS is saturated hydraulic conductivity；M, n, α are empirical coefficient, m=1-
1/n。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910077949.4A CN109490150B (en) | 2019-01-28 | 2019-01-28 | Heterogeneous soil pore advantage current simulation test method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910077949.4A CN109490150B (en) | 2019-01-28 | 2019-01-28 | Heterogeneous soil pore advantage current simulation test method and device |
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| Publication Number | Publication Date |
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| CN109490150A true CN109490150A (en) | 2019-03-19 |
| CN109490150B CN109490150B (en) | 2024-02-06 |
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ID=65714944
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|---|---|---|---|
| CN201910077949.4A Active CN109490150B (en) | 2019-01-28 | 2019-01-28 | Heterogeneous soil pore advantage current simulation test method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850058A (en) * | 2019-11-18 | 2020-02-28 | 长安大学 | Leaching test device and using method thereof |
| CN111208042A (en) * | 2020-02-07 | 2020-05-29 | 中国科学院武汉岩土力学研究所 | Device and method for inverting hydraulic parameters of unsaturated waste soil |
| CN114113204A (en) * | 2021-11-11 | 2022-03-01 | 南京大学（苏州）高新技术研究院 | Quantitative testing method for dominant flow on surface of fractured soil body |
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| KR20090016071A (en) * | 2007-08-10 | 2009-02-13 | 광주과학기술원 | Extraction system for extracting of soil pore water |
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| CN110850058B (en) * | 2019-11-18 | 2023-11-14 | 长安大学 | Leaching test device and application method thereof |
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| CN114113204A (en) * | 2021-11-11 | 2022-03-01 | 南京大学（苏州）高新技术研究院 | Quantitative testing method for dominant flow on surface of fractured soil body |
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| CN109490150B (en) | 2024-02-06 |
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