CN103163055A - Resistivity imaging consolidation apparatus for judging osmotic coefficient of unsaturated soil - Google Patents
Resistivity imaging consolidation apparatus for judging osmotic coefficient of unsaturated soil Download PDFInfo
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- CN103163055A CN103163055A CN2013100531078A CN201310053107A CN103163055A CN 103163055 A CN103163055 A CN 103163055A CN 2013100531078 A CN2013100531078 A CN 2013100531078A CN 201310053107 A CN201310053107 A CN 201310053107A CN 103163055 A CN103163055 A CN 103163055A
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Abstract
The invention discloses a resistivity imaging consolidation apparatus for judging an osmotic coefficient of unsaturated soil. The resistivity imaging consolidation apparatus for judging the osmotic coefficient of the unsaturated soil comprises a top cover, a side ring and a base disc. The side ring is arranged on the base disc. The top cover is sleeved in the side ring. The upper portion of the top cover is a stainless steel cover. The lower portion of the top cover is a plastic cylinder body. A plurality of copper electrodes are evenly distributed in the plastic cylinder body. Meanwhile, a bender element and a wave detection device are further arranged. The plastic cylinder body is provided with a drainage channel and a drainage concentric circular ring communicated with the drainage channel. The side ring is a stainless steel ring, wherein an inner lining of the side ring is provided with a plastic circular ring. A plurality of copper electrodes are arranged on the side wall of the side ring at equal intervals. The base disc comprises a stainless steel barrel and a plastic inner lining arranged on the inner wall of the stainless steel barrel. The plastic inner lining is arranged to be corresponding to the plastic cylinder body. According to the resistivity imaging consolidation apparatus for judging the osmotic coefficient of the unsaturated soil, the defects in the prior art that anisotropy, anisotropism and a small experiment size cannot be considered are overcome. Through the fact that the resistivity of a soil body is changed along with the fact that pore water flows is measured a consolidation test, the osmotic coefficient of the unsaturated soil can be judged cheaply, conveniently and rapidly.
Description
Technical field
The invention belongs to technical field of civil engineering, relate in particular to for the resistivity imaging consolidometer of estimating the unsaturated soil infiltration coefficient.
Background technology
Along with China's expanding economy, the urban groundwater resource pollution problem is day by day serious.Pollutant is often migrated to saturated soil by earth's surface superficial part unsaturated soil, and therefore, at first the research of Contaminants Transport rule need to determine the seepage flow characteristics of unsaturated soil.In unsaturated soil, seepage flow characteristics can obtain by straightway testing method and indirect method usually, and the straightway testing method has comprised site test and shop experiment.Site test such as the tension force infiltration instrument test scope of application are confined to zone more shallow more than the earth's surface, and the test duration is long, and workload is large.Experimental Method in Laboratory adopts the infiltration coefficient of consolidation test or constant head and varying head test determination soil usually, this method is considered as homogeneous, isotropic unit with all indoor samples, ignored remodeling process to the anisotropic impact of sample, and volume of sample is little, and size effect makes the unsaturated soil seepage flow characteristics reliability that records not strong.Up-to-date research tendency is for adopting indirect method to estimate the penetration signature of unsaturated soil, and wherein the most commonly used and easy is the Method for Numerical Inversion.At first the Method for Numerical Inversion is supposed can be similar to infiltration coefficient function k and is adopted the analytic expression of several limited unknown parameters to express, give these unknown parameter initial values, then the k substitution of having given initial value is characterized the governing equation of instantaneous stream, and the controllable boundary condition of Combined Trials and starting condition, formation can complete description seepage state mathematical model, finally find the solution this mathematical model.Solution and the experimental observation of seepage flow equation are compared and analyze, improve and optimize the assignment of unknown parameter, repeat above-mentioned steps, until the error between the analogue value and measured value reaches minimum, thereby determine the expression formula of k.The Method for Numerical Inversion need to carry out indoor model test or site test equally, to provide actual observed value as a comparison.The resistivity imaging technology is a kind of emerging experimental technique, resistivity value reflection property of soil by the test soil body, the advantage such as quick owing to having, reliable, with low cost is rapidly developed, and can be used for that the monitoring of pollutant distribution scope, pollution level are divided, Soil Anisotropic is differentiated and the field such as ground Disposal quality evaluation.In consolidation test, along with the effect of load, pore water flows out, and volume of voids changes, and the resistivity of soil also changes thereupon, therefore can utilize the change inverting of resistivity to obtain soil body osmotic coefficient.Utilize the Method for Numerical Inversion and resistivity imaging technology, in conjunction with indoor conventional consolidometer, the present invention proposes a resistivity imaging consolidometer that can utilize the Method for Numerical Inversion to estimate the unsaturated soil seepage flow characteristics.
Summary of the invention
Goal of the invention: be problem and the defective that overcomes above-mentioned existence, the present invention proposes a kind of resistivity imaging consolidometer that can be used for estimating the unsaturated soil infiltration coefficient.
Technical scheme: for solving the problems of the technologies described above, the present invention is by the following technical solutions: a kind of resistivity imaging consolidometer of estimating the unsaturated soil infiltration coefficient, comprise top cover, side ring and chassis, described side ring is located on the chassis, described top cover is inserted in side ring, wherein: the top of described top cover is stainless steel cover, the bottom is plastic cylinder, be evenly distributed with a plurality of copper electrodes in described plastic cylinder, also be provided with simultaneously flexure element and detection instrument, described plastic cylinder is provided with drainage channel and draining donut, and described draining donut is communicated with drainage channel; Described side ring is lined with the stainless steel ring of plastic circle ring in being, the sidewall equal intervals of side ring is provided with a plurality of copper electrodes simultaneously; Described chassis comprises stainless steel cask and is located at the plastic inner lining of stainless steel cask inwall, described plastic inner lining is provided with copper electrode, flexure element, detection instrument and draining donut equally, and corresponding with copper electrode, flexure element, detection instrument and draining donut in plastic cylinder respectively; Described plastic inner lining also is provided with drainage channel simultaneously, and this drainage channel is connected with the draining concentric circles.
Further improve, described copper electrode comprises copper electrode bar, polyamide fibre plastic jacket, stainless steel handle and wire, described copper electrode bar tail end is connected with wire, and described polyamide fibre plastic jacket is enclosed within on the copper electrode bar, and described wire is imbedded in the stainless steel handle and left lead-in wire; Be provided with O-ring seal between copper electrode bar and Maranyl cover simultaneously.
Further, described top cover and chassis are respectively equipped with 13 copper electrodes, and wherein 8 copper electrodes be evenly distributed on respectively with the concentric circumference of top cover and chassis on, other 5 copper electrodes are arranged on respectively the centre on top cover and chassis.
Further, the surface of contact of described top cover and side ring, and the surface of contact on side ring and chassis is provided with O-ring seal; The surface of contact of described copper electrode and plastic cylinder or plastic inner lining is provided with O-ring seal simultaneously.
As preferably, described side ring is provided with 16 copper electrodes.
As preferably, the material of described plastic cylinder and plastic inner lining is polyamide fibre, and resistivity is 1～9 * 10
13Ω m.
As preferably, the outer wall on described chassis is provided with the pressure valve that is connected with drainage channel.
Beneficial effect: compared with prior art, the present invention has the following advantages: pollutant is often migrated to the saturated soil direction by earth's surface superficial part unsaturated soil, and therefore, at first the research of Contaminants Transport rule need to determine the seepage flow characteristics of unsaturated soil.The invention solves when domestic existing consolidometer is estimated the unsaturated soil seepage flow characteristics and can not consider anisotropy, nonuniformity and the little defective of test size, by in the test consolidation test along with pore water flows out the change cause soil body resistivity, carry out cheapness, estimate the unsaturated soil infiltration coefficient quickly and easily.This technology has reliably, economical, fast with the characteristics of repeatability.
Description of drawings
Fig. 1 is the structural representation of resistivity imaging consolidometer of the present invention;
Fig. 2 is the structural representation of side ring of the present invention;
Fig. 3 is the structural representation on chassis of the present invention;
Fig. 4 is the structural representation of copper electrode of the present invention.
Wherein, stainless steel cover 1, plastic cylinder 2, copper electrode 3, flexure element 4, detection instrument 5, drainage channel 6, draining donut 7, stainless steel ring 8, plastic circle ring 9, stainless steel cask 10, plastic inner lining 11, pressure valve 12, O-ring seal 13, copper electrode bar 31, polyamide fibre plastic jacket 32, stainless steel handle 33, wire 34.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
as shown in Figure 1, a kind of resistivity imaging consolidometer of estimating the unsaturated soil infiltration coefficient, this device are divided into top cover, side ring and three, chassis part, top cover top is stainless steel cover, bear the load that consolidation test applies, the top cover bottom is the polyamide fibre plastic cylinder, electric current and stainless steel cover insulation with resistivity imaging consolidometer inside, be provided with 13 copper electrodes in the inside of top cover, copper electrode 3 is by the copper electrode bar, O-ring seals, the polyamide fibre plastic jacket, stainless steel handle and wire form, wherein 8 copper electrodes equidistantly are distributed on circumference with polyamide fibre plastic cylinder concentric, and 5 copper electrodes have been installed concentratedly near the polyamide fibre plastic cylinder center of circle, 1 flexure element and 1 detection instrument, be provided with drainage channel and 3 draining donuts in polyamide fibre plastic cylinder inside, above drainage channel, flexure element and detection instrument inside all are equipped with O-ring seals, the current that prevent consolidometer inside cause short circuit, this device side ring outer wall is stainless steel ring, and inwall is that the polyamide fibre plastic circle ring plays insulating effect, is provided with 16 copper electrodes in the sidewall circumference equal intervals with the side ring concentric, this device chassis design is similar to top cover, the bottom, chassis is stainless steel cask, stainless steel cask 11 inwalls are covered by the polyamide fibre plastics, be provided with 13 copper electrodes, 1 flexure element, 1 detection instrument and 3 draining donuts at inside chassis, element in each element and top cover over against, be provided with equally drainage channel at inside chassis, and in the outer wall opposition of stainless steel cask, pressure valve is installed, to adjust and to control draining and the stress condition in consolidometer, be provided with O-ring seals in the groove of polyamide fibre plastics corresponding to the polyamide fibre plastic circle ring.
Polyamide fibre plastic cylinder diameter is designed to 130mm, resistivity approximately 10
13Ω m.
The stainless steel ring external diameter of side ring is 150mm, and internal diameter is 135mm, and the polyamide fibre plastic circle ring external diameter of side ring is 135mm, and internal diameter is 130mm, and the side ring height is 100mm.
The head copper electrode bar diameter of copper electrode is 2mm, and the spacing in side ring between 16 copper electrodes and side ring bottom surface is 20mm.
3 draining donut diameters are respectively 70mm, 90mm and 130mm, and tolerance is 2mm.
The stainless steel cask external diameter on chassis is 170mm, and internal diameter is 150mm, and the polyamide fibre plastics external diameter on chassis is 150mm, and internal diameter is 130mm.
In the resistivity imaging consolidation test, in polyamide fibre plastic cylinder and chassis, the spacing of polyamide fibre frosting is 20-60mm, and also namely the height of the soil sample of testing should be 20-60mm.
The resistivity imaging consolidometer that can be used for estimating the unsaturated soil infiltration coefficient of the present invention, its penetration signature part of detecting mainly are comprised of stainless steel cask and polyamide fibre plastics, copper electrode, drainage channel, 3 draining donuts, O-ring seals and the pressure valve on the stainless steel ring of the stainless steel cover of top cover and polyamide fibre plastic cylinder, side ring and polyamide fibre plastic circle ring, chassis.The stainless steel cask on the stainless steel cover of top cover, the stainless steel ring of side ring and chassis can bear the load that consolidation test applies.The polyamide fibre plastics on the polyamide fibre plastic cylinder of top cover, the polyamide fibre plastic circle ring of side ring, chassis are with the stainless steel insulation of resistivity imaging consolidometer internal circuit and outer wall, guarantee the correct measurement of electromotive force, reduce simultaneously the friction effect between resistivity imaging consolidometer inwall and soil sample.42 copper electrodes are arranged on the inner boundary of resistivity imaging consolidometer, and 16 electrodes are set in qually spaced in the side ring inwall, with the spacing of resistivity imaging consolidometer inwall bottom surface be 20mm, and 13 electrodes are respectively placed on top cover and chassis.Concentrate 5 copper electrodes that are positioned over top cover and chassis to increase the resistivity information at soil sample middle part, this is because the resolution of this place's back analysis is usually very poor, installs sensitivity and the accuracy of more step increase electricity inverting concentratedly.Wherein apply voltage on two copper electrodes at side ring during test, can draw the distribution of electric potential difference on other copper electrodes, thereby obtain the size of each position resistivity of the soil body, can be simultaneously from vertical and level to the measurement of carrying out resistivity, take into full account anisotropy and the nonuniformity of soil sample.Drainage channel and 3 draining donuts provide consolidation test required drainage path, and the mobile short circuit that causes for fear of pore water, near drainage channel, flexure element and detection instrument inside all is equipped with O-ring seals, thereby guarantees that pore water flows all the time in the drainage path of design.Pressure valve is controlled the required consolidation pressure of consolidation test and drainage channel is provided.Can obtain the infiltration coefficient function k of unsaturated soil by numerical simulation technology in conjunction with back analysis.
The Archie equation has provided conductivity and saturation degree relation that porous medium records:
In formula, ρ and ρ
wBe respectively soil and hole resistivity of water; N is porosity; P and q are empirical parameter, have reflected the internal void connection features.When in porosity and water, salt content remained unchanged, the Archie method can be written as:
In formula, ρ
satResistivity for saturated soil sample.
The saturation degree of remoulded sample can be written as:
S
r＝(σ/σ
sat)
1/q
Due on resistivity imaging consolidometer all borders, copper electrode is installed all, therefore can carry out a large amount of resistivity measurements, and the change of pore water has also obtained reflection.
According to the law of conservation of mass of continuous medium, the mobile partial differential equation of hole water and air is expressed as follows:
In formula, γ
iBe the native unit weight of i phase; q
iBe unit rate of flow; N is porosity; Sr is saturation degree; I=w or a, w represents water, a represents gas phase.
Can adopt the Darcy law to describe flowing of hole water and air:
In formula, k
aAnd k
wFor being respectively the infiltration coefficient of gas and water, it is the function of saturation degree; u
wAnd u
aBe respectively the gentle pressure of water.k
wBe the infiltration coefficient of unsaturated soil.
Brooks and Corey set up and saturation degree between relation:
K in formula
w satInfiltration coefficient for saturated soil.β is experience factor.
Corey has provided the infiltration coefficient expression formula of hole gas:
K in formula
a dryInfiltration coefficient for air in soil body under the bone dry condition.
According to van Genuchten relational expression, the moisture retention curve of soil is:
In formula, S
eBe effective saturation; S
r RESBe residual saturation; α, n, m are experience factor; s=u
a-u
wBe matric suction.The hysteresis phenomenon of having ignored native water characteristic curve repeatedly adds the water process because experienced in test.
Accordingly, the constitutive equation of two kinds of fluids of water and air is:
γ
w＝γ
w0exp(B
wu
w)
In formula, γ
w0The water capacity of depressing for normal atmosphere weighs, γ
w0=10kN/m
3B
wBe the coefficient of volume compressibility of water, B
w=1 * 10
-6kPa
-1m
aMassfraction when being considered as ideal gas for air, m
a=28.96kg/mol; R is ideal gas constant, R=8.31432J/ (molK); T is absolute temperature, T=298.23K; G is acceleration of gravity, g=9.8m/s
2
After constitutive equation is added suitable boundary condition and starting condition, namely can find the solution by finite element numerical simulation software.For simplifying calculation process, test can be considered as axially symmetric structure and process, grid is divided into three node types, and is more intensive near drainage channel.Except drainage channel, the border of sample may be for all not possessing perviousness to water and air.
The solution of finite element is in the same time u not
aAnd u
wForm, saturation degree and resistivity draw by moisture retention curve and Archie equation.The unknown quantity that above-mentioned model provides is α, n, m and five parameters of β.Adopt numerical simulation resistivity imaging consolidation test, obtain not resistivity simulation value in the same time, then resistivity simulation value and actual observed value are compared, by the difference of objective function Φ (b) sign resistivity simulation value and observed reading.
Φ(b)＝(e
T/ρ
m)·e
In formula, ρ
mResistivity vector for observation; B is parameter vector, b=b (α, n, m, β); E is error, e=ρ
m-ρ
sρ
sSeepage flow vector for numerical simulation; T represents transposition.When Φ (b) hour, can obtain the volume infiltration coefficient function k of unsaturated soil.At present existing many methods can make objective function reach minimum value, and as method of steepest descent, Newton method, Gaussian processes and LM method (Levenberg-Marquardt method) etc., wherein the LM method is widely used as standard method most.
Claims (7)
1. resistivity imaging consolidometer of estimating the unsaturated soil infiltration coefficient, it is characterized in that: comprise top cover, side ring and chassis, described side ring is located on the chassis, and described top cover is inserted in side ring, wherein:
The top of described top cover is stainless steel cover, the bottom is plastic cylinder, is evenly distributed with a plurality of copper electrodes in described plastic cylinder, also is provided with simultaneously flexure element and detection instrument, described plastic cylinder is provided with drainage channel and draining donut, and described draining donut is communicated with drainage channel;
Described side ring is lined with the stainless steel ring of plastic circle ring in being, the sidewall equal intervals of side ring is provided with a plurality of copper electrodes simultaneously;
Described chassis comprises stainless steel cask and is located at the plastic inner lining of stainless steel cask inwall, described plastic inner lining is provided with copper electrode, flexure element, detection instrument and draining donut equally, and corresponding with copper electrode, flexure element, detection instrument and draining donut in plastic cylinder respectively; Described plastic inner lining also is provided with drainage channel simultaneously, and this drainage channel is connected with the draining concentric circles.
2. estimate according to claim 1 the resistivity imaging consolidometer of unsaturated soil infiltration coefficient, it is characterized in that: described copper electrode comprises copper electrode bar, polyamide fibre plastic jacket, stainless steel handle and wire, described copper electrode bar tail end is connected with wire, described polyamide fibre plastic jacket is enclosed within on the copper electrode bar, and described wire is imbedded in the stainless steel handle and left lead-in wire; Be provided with O-ring seal between copper electrode bar and Maranyl cover simultaneously.
3. estimate according to claim 2 the resistivity imaging consolidometer of unsaturated soil infiltration coefficient, it is characterized in that: described top cover and chassis are respectively equipped with 13 copper electrodes, and wherein 8 copper electrodes be evenly distributed on respectively with the concentric circumference of top cover and chassis on, other 5 copper electrodes are arranged on respectively the centre on top cover and chassis.
4. estimate according to claim 3 the resistivity imaging consolidometer of unsaturated soil infiltration coefficient, it is characterized in that: the surface of contact of described top cover and side ring, and the surface of contact on side ring and chassis is provided with O-ring seal; The surface of contact of described copper electrode and plastic cylinder or plastic inner lining is provided with O-ring seal simultaneously.
5. estimate according to claim 4 the resistivity imaging consolidometer of unsaturated soil infiltration coefficient, it is characterized in that: described side ring is provided with 16 copper electrodes.
6. estimate according to claim 5 the resistivity imaging consolidometer of unsaturated soil infiltration coefficient, it is characterized in that: the material of described plastic cylinder and plastic inner lining is polyamide fibre, and resistivity is 1～9 * 10
13Ω m.
7. estimate according to claim 6 the resistivity imaging consolidometer of unsaturated soil infiltration coefficient, it is characterized in that: the outer wall on described chassis is provided with the pressure valve that is connected with drainage channel.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760089A (en) * | 2014-01-29 | 2014-04-30 | 山东农业大学 | Experiment-numerical analysis combined determination method for relative permeability coefficient of unsaturated soil |
| CN104897464A (en) * | 2015-05-06 | 2015-09-09 | 同济大学 | Consolidation apparatus for measuring static earth pressure coefficient and small strain shear modulus |
| CN106248548A (en) * | 2016-07-21 | 2016-12-21 | 江西理工大学 | Aeration zone boring constant head water injection test saturation permeability coefficient method of testing |
| CN109632494A (en) * | 2019-01-28 | 2019-04-16 | 浙江大学 | The consolidation testing device of complex spectrum induced polarization method and flexure element method |
| CN109799264A (en) * | 2019-02-26 | 2019-05-24 | 东南大学 | For studying the device of frozen soil thaw collapse and resistivity response under various working |
| CN109959553A (en) * | 2019-03-15 | 2019-07-02 | 浙江大学 | Consolidation-infiltration-shear wave velocity coupling experiment device |
| CN110006756A (en) * | 2019-03-25 | 2019-07-12 | 长安大学 | The device and method of in situ measurement Soil Anisotropic parameter in a kind of hole |
| 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 |
| CN111238565A (en) * | 2019-12-06 | 2020-06-05 | 重庆交通大学 | Device and method for testing unsaturated geotechnical characteristic relation |
| CN113916750A (en) * | 2021-11-23 | 2022-01-11 | 南通市建筑科学研究院有限公司 | Multifunctional impermeability tester and concrete comprehensive impermeability test system comprising same |
| CN116148165A (en) * | 2023-01-06 | 2023-05-23 | 重庆大学 | Three-dimensional imaging pinhole erosion test device based on resistance and test method thereof |
| CN116609242A (en) * | 2023-07-19 | 2023-08-18 | 北京建工环境修复股份有限公司 | Barrier material permeability characteristic evaluation method and system based on resistivity signal |
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| CN103760089A (en) * | 2014-01-29 | 2014-04-30 | 山东农业大学 | Experiment-numerical analysis combined determination method for relative permeability coefficient of unsaturated soil |
| CN103760089B (en) * | 2014-01-29 | 2015-12-02 | 山东农业大学 | Test-numerical analysis simultaneous determination the method for unsaturated soil relative coefficient of permeability |
| CN104897464A (en) * | 2015-05-06 | 2015-09-09 | 同济大学 | Consolidation apparatus for measuring static earth pressure coefficient and small strain shear modulus |
| CN104897464B (en) * | 2015-05-06 | 2018-07-06 | 同济大学 | A kind of consolidation apparatus for measuring coefficient of static earth pressure and small-strain shear modulus |
| CN106248548A (en) * | 2016-07-21 | 2016-12-21 | 江西理工大学 | Aeration zone boring constant head water injection test saturation permeability coefficient method of testing |
| CN106248548B (en) * | 2016-07-21 | 2018-08-21 | 江西理工大学 | Aeration zone drilling constant head water injection test saturation permeability coefficient test method |
| CN109632494A (en) * | 2019-01-28 | 2019-04-16 | 浙江大学 | The consolidation testing device of complex spectrum induced polarization method and flexure element method |
| CN109799264A (en) * | 2019-02-26 | 2019-05-24 | 东南大学 | For studying the device of frozen soil thaw collapse and resistivity response under various working |
| CN109959553A (en) * | 2019-03-15 | 2019-07-02 | 浙江大学 | Consolidation-infiltration-shear wave velocity coupling experiment device |
| CN109959553B (en) * | 2019-03-15 | 2023-12-01 | 浙江大学 | Consolidation-permeation-shear wave velocity coupling experimental device |
| CN110006756A (en) * | 2019-03-25 | 2019-07-12 | 长安大学 | The device and method of in situ measurement Soil Anisotropic parameter in a kind of hole |
| CN110006756B (en) * | 2019-03-25 | 2024-06-04 | 长安大学 | Device and method for in-situ measurement of soil body anisotropy parameters in holes |
| CN111238565B (en) * | 2019-12-06 | 2022-05-10 | 重庆交通大学 | Test method for testing unsaturated geotechnical characteristic relation |
| CN111238565A (en) * | 2019-12-06 | 2020-06-05 | 重庆交通大学 | Device and method for testing unsaturated geotechnical characteristic relation |
| 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 |
| CN111208042B (en) * | 2020-02-07 | 2021-06-29 | 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 |
| CN113916750A (en) * | 2021-11-23 | 2022-01-11 | 南通市建筑科学研究院有限公司 | Multifunctional impermeability tester and concrete comprehensive impermeability test system comprising same |
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| CN116609242A (en) * | 2023-07-19 | 2023-08-18 | 北京建工环境修复股份有限公司 | Barrier material permeability characteristic evaluation method and system based on resistivity signal |
| CN116609242B (en) * | 2023-07-19 | 2023-09-22 | 北京建工环境修复股份有限公司 | Barrier material permeability characteristic evaluation method and system based on resistivity signal |
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