CN110333269A - The lossless formula measuring device and its measurement method of frozen soil Moisture Transfer Rule - Google Patents
The lossless formula measuring device and its measurement method of frozen soil Moisture Transfer Rule Download PDFInfo
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Abstract
The invention discloses the measuring devices that a kind of frozen soil does not freeze water Transport, container, controller, several electrode patch, several electrode connecting lines, low-temperature circulating device, host computer, external measurement device and water injection module including both ends open；Low-temperature circulating device is mounted on the container both ends of both ends open and carries out temperature control to the frozen soil sample being placed in container；Controller coordination electrode patch works and obtains the electric signal for measurement；Electrode patch obtains the electric signal of the power supply signal or output of input for measurement；Water injection module connects the water filling port of low-temperature circulating device and fills the water to container；External measurement device is powered to controller, is provided the power supply signal of input and is obtained the electric signal for measurement by controller；PC control electrode patch and control low-temperature circulating device work.The invention also discloses the measurement methods that the frozen soil does not freeze the measuring device of water Transport.The present invention realizes the measurement that frozen soil does not freeze water, and simple and reliable, easy to use.
Description
Technical field
Present invention relates particularly to the lossless formula measuring devices and its measurement method of a kind of frozen soil Moisture Transfer Rule.
Background technique
Frozen soil contains the Rock And Soil of ice crystal when being defined as be below 0 DEG C.According to freeze-off time, can be divided into: ever-frozen ground is (also referred to as
Permafrost refers to the soil layer for freezing not melt of lasting 2 years or 2 years or more), frost zone (half a month to several months) and freeze in short-term
Soil (a few hours/a few days down to half a month).China's ever-frozen ground accounts for 1/5 or more national territorial area, is to be only second to Russia and Canada
The big frozen soil state in third place in the world, be mainly distributed on northeast, Inner Mongol and Xinjiang Tibet grade height latitude and high altitude localities, usually can shape
At the weather of high and cold high fever, due to the influence of weather, the most of frozen soil in China belongs to frost zone.
However, the ultimate challenge that the high-speed rail construction of Han Qu is faced with airport is how to cope with roadbed " frost heave " problem.
So-called frost heave refers to that moisture is due to congealing into ice so as to cause volume expansion, causing in subzero state at negative temperature in roadbed
The phenomenon that subgrade and pavement swells is particularly acute construction quality damage.The area the Liang Tiaohan high-speed rail that China has been built up at present, Harbin-to-Dalian
All there is different degrees of problem of frost heave in high-speed rail and Lanzhou-Xinjiang high-speed rail.Harbin-Dalian railway line all fronts frost heave average out to 5mm, reaches as high as 20mm,
Seriously affect operation security.Problem of frost heave have become cold regions engineering construction overriding concern problem, especially high-speed railway with
This kind of road pavement smooth degree in airport requires high key project.The essence of frost heave is water translocation problem, is with Harbin-Dalian railway line
Example, since the roadbed surface temperature of Han Qu is spent down to -30, water translocation of the temperature in 10 degree or so current frozen soil in subgrade soils
The generally referred to as migration of liquid water, and what it did not froze that water refers generally in freezing process is exactly liquid water, therefore studies moisture
Migration be exactly study its content for not freezing water and its variation, and do not freeze water content can variation with temperature and change, water
The phase transformation divided will affect waterpower, heating power and the physical property of freezing soil, so the measurement for not freezing water is very important.
The common method of water translocation is all experimental method indoors in current measurement unsaturated soil freezing process, domestic
The device for carrying out water translocation in measurement unsaturated soil freezing process generally directlys adopt layering oven drying method or TDR is similar
Method etc..However, although such methods have certain scope of application, but still there is following limitation.
1, it is layered oven drying method, the total amount of soil body water translocation in overall process can only be understood, and during cannot being reflected in
The rule of water translocation, and the required time is longer, heavy workload；
2, TDR similar method, although such method operation is fairly simple, the time is also shorter, such method
It inserts a probe into soil, can destroy the integrality of the soil body in this way, and TDR method is lower to probe into water translocation its precision, it is right
The influence factor of experiment is more, and unstable.
Summary of the invention
A kind of one of the objects of the present invention is to provide high reliablity and simply and easily nothing of frozen soil Moisture Transfer Rule
Damage formula measuring device.
The second object of the present invention is to provide a kind of survey of the lossless formula measuring device of frozen soil Moisture Transfer Rule
Amount method.
The lossless formula measuring device of this frozen soil Moisture Transfer Rule provided by the invention, container including both ends open,
Controller, several electrode patch, several electrode connecting lines, low-temperature circulating device, host computer, external measurement device and water injection module；
Low-temperature circulating device includes the first low-temperature circulating plate interconnected and the second low-temperature circulating plate, and the first low-temperature circulating plate is mounted on two
One end of the container of end opening, the second low-temperature circulating plate are mounted on the other end of the container of both ends open, and low-temperature circulating device is used for
Temperature control is carried out to the frozen soil sample being placed in container；One end connection electrode connecting line of controller, and connected by electrode
Wiring connection electrode patch；The other end of controller is directly connected to external measurement device；Controller is for coordination electrode patch
Work, and obtain the electric signal for measurement of electrode patch output；Electrode patch is mounted on container inner wall, and passes sequentially through electricity
Pole connecting line connects external measurement device with controller, for obtaining the telecommunications of the power supply signal or output of input for measurement
Number；Water injection module connects the water filling port of low-temperature circulating device, for filling the water in container；External measurement device is used to supply to controller
Electricity provides the power supply signal of input, and the electric signal for measurement of electrode patch output is obtained by controller；Host computer
It is connect with controller, for passing through the work of controller coordination electrode patch, and the temperature of control low-temperature circulating device.
The container of the both ends open is round and both ends open lucite cylinder.
The water injection module includes horse trie Austria's bottle and water filling sebific duct；Horse trie Austria's bottle connects low temperature by water filling sebific duct
The water filling port of circulator, for being filled the water in container.
The electrode patch is mounted on container inner wall, specially divides the container into several layers, and every alternating floor is mounted on
Several electrode patch, electrode patch are connected by electrode connecting line, controller and external measurement device, for obtaining the electricity of input
The electric signal of source signal or output for measurement；The resistivity of layer where electrode patch is used to measure by vanderburg method.
The electrode patch is mounted on container inner wall, specially divides the container into 20 layers, every alternating floor is mounted on 4
Electrode patch, the connecting line of first electrode patch and third electrode patch is by the center of circle at place layer, second electrode patch and the
For the connecting line of four electrode patch by the center of circle of place layer, it is electric that first electrode patch is equal to third at a distance from second electrode patch
Pole patch is at a distance from the 4th electrode patch.
The electrode patch is thin copper electrode patch.
The electrode patch is mounted on container inner wall, and specially electrode patch is pasted onto container inner wall by glue.
The present invention also provides the measurement method of the lossless formula measuring device of the frozen soil Moisture Transfer Rule, including it is as follows
Step:
S1. it is only packed into the soil pattern of one layer of known moisture content in measuring device, and does not enable low-temperature circulating device and note
Water module；
S2. it measures using vanderburg method and obtains the soil pattern resistivity of single layer；
S3. the soil pattern of water content identical as step S1 is filled in test device, and do not enable low-temperature circulating device and
Water injection module；
S4. the soil pattern resistivity of layer where measuring using vanderburg method and obtain electrode patch；
S5. the electrode patch place layer obtained according to the soil pattern resistivity of the obtained single layer of step S2 and step S4
Soil pattern resistivity, the correction factor of layer where calculating each electrode patch；
S6. the soil pattern of water content identical as step S1 is filled in test device, sets the temperature of low-temperature circulating device
With the water injection rate of water injection module, and start low-temperature circulating device and water injection module, to obtain frozen soil sample；
S7. the test frozen soil sample resistivity of layer where measuring using vanderburg method and obtain electrode patch；
S8. according to the correction factor of the obtained each electrode patch place layer of step S5, the electrode paste that step S7 is obtained
The test frozen soil sample resistivity of layer is modified where piece, to obtain the true frozen soil sample resistance of layer where electrode patch
Rate；
S9. according to the true frozen soil sample resistivity of the obtained electrode patch place layer of step S8, electrode patch institute is calculated
In the unfrozen water content of the frozen soil sample of layer；
S10. according to the time of measuring point of setting, step S7~S9 is repeated, to obtain the frozen soil of layer where electrode patch
The curve that the unfrozen water content of sample changes over time；
S11. the unfrozen water content of the frozen soil sample of layer changes over time where the electrode patch obtained according to step S10
Curve, analysis frozen soil do not freeze the Transport of water.
Using vanderburg method measured resistivity, following steps measured resistivity is specially used:
A. four electrode patch connected for frozen soil sample, are infused between first electrode patch and second electrode patch
Enter constant current IA1-A2, and measure the voltage V between third electrode patch and the 4th electrode patchA3-A4, to obtain the first electricity
Resistance value
B. four electrode patch connected for frozen soil sample, are infused between second electrode patch and third electrode patch
Enter constant current IA2-A3, and measure the voltage V between the 4th electrode patch and first electrode patchA4-A1, to obtain the second electricity
Resistance value
C. electricalresistivityρ is calculated using following formula:
R in formula1For first resistor value, R2For second resistance value, d is the diameter of container.
The correction factor of layer, is specially calculated using following formula where each electrode patch of calculating described in step S5
The correction factor of layer where to each electrode patch:
μ in formulaiFor the correction factor of layer where i-th layer of motor patch, riFor the soil examination of layer where i-th layer of electrode patch
Sample resistivity, r are the soil pattern resistivity of single layer.
According to the correction factor of the obtained each electrode patch place layer of step S5 described in step S8, step S7 is obtained
Electrode patch where the test frozen soil sample resistivity of layer be modified, each electrode patch for specially obtaining step S5
The correction factor of place layer, the test frozen soil sample resistivity of layer where the electrode patch obtained multiplied by step S7, to obtain
The true frozen soil sample resistivity of layer where electrode patch.
The unfrozen water content of the frozen soil sample of layer where calculating electrode patch described in step S9, specially using following public
The unfrozen water content of the frozen soil sample of layer where formula calculates electrode patch:
ρ is the resistivity of the frozen soil sample of layer where electrode patch, θ in formulavThe frozen soil sample of layer where electrode patch
The content for not freezing water.
The lossless formula measuring device and its measurement method of this frozen soil Moisture Transfer Rule provided by the invention, pass through design
Measuring device and measurement method, realize the measurement that frozen soil does not freeze water, thus for frozen soil do not freeze water Transport analysis mention
Basic data and measurement data are supplied；The method of the present invention is simple and reliable, and easy to use.
Detailed description of the invention
Fig. 1 is the schematic diagram of measuring device of the invention.
Fig. 2 is the arrangement schematic diagram and vanderburg method schematic diagram of single-layer electrodes patch of the invention.
Fig. 3 is the method flow schematic diagram of the method for the present invention.
Specific embodiment
It is as shown in Figure 1 measuring device schematic diagram of the invention: this frozen soil Moisture Transfer Rule provided by the invention
Lossless formula measuring device, container, controller, several electrode patch, several electrode connecting lines, low-temperature circulating including both ends open
Device, host computer, external measurement device and water injection module；Low-temperature circulating device includes the first low-temperature circulating plate interconnected and second
Low-temperature circulating plate, the first low-temperature circulating plate are mounted on one end of the container of both ends open, and the second low-temperature circulating plate is mounted on both ends
The other end of open container, low-temperature circulating device are used to carry out temperature control to the frozen soil sample being placed in container；Controller
One end connection electrode connecting line, and pass through electrode connecting line connection electrode patch；The other end of controller is directly connected to outside
Measuring device；Controller is used for the work of coordination electrode patch, and obtains the electric signal for measurement of electrode patch output；Electricity
Pole patch is mounted on container inner wall, and passes sequentially through electrode connecting line and connect external measurement device with controller, defeated for obtaining
Electric signal of the power supply signal or output entered for measurement；Water injection module connects the water filling port of low-temperature circulating device, for appearance
Water filling in device；External measurement device is used to power to controller, provides the power supply signal of input, and obtain electricity by controller
The electric signal for measurement of pole patch output；Host computer is connect with controller, for passing through controller coordination electrode patch
Work, and the temperature of control low-temperature circulating device.
In the specific implementation, this frozen soil provided by the invention does not freeze the measuring device of water Transport, including both ends are opened
Container 7, controller 8 (PLC can be used when specific implementation), external measurement device 9, the host computer 10 of mouth (can when specific implementation
To use computer), several electrode patch 5, several electrode connecting lines 6, low-temperature circulating device 4 and water injection module (1 and 2)；Low temperature follows
Ring device includes the first low-temperature circulating plate interconnected and the second low-temperature circulating plate, and the first low-temperature circulating plate is mounted on both ends open
Container one end, the second low-temperature circulating plate is mounted on the other end of the container of both ends open, and low-temperature circulating device is used for placement
Frozen soil sample in container carries out temperature control；Logic controller (PLC) is a kind of programmable logic controller (PLC), can be by special
Realize any measurement in a closed series interelectrode two-by-two with system, electrode patch is mounted on container inner wall, and by electrode connecting line with
Logic controller (PLC) connects external measurement device, for obtaining the telecommunications of the power supply signal or output of input for measurement
Number；Water injection module connects the water filling port of low-temperature circulating device, for filling the water in container；3 in figure be barometric pipe, for putting down
The air pressure weighed in test specimen tube, so that the water energy in Markov bottle enough flows into sink.
In the specific implementation, the container of both ends open is round and both ends open lucite cylinder；Water injection module includes
Horse trie Austria bottle 1 and water filling sebific duct 2；Horse trie Austria's bottle connects the water filling port of low-temperature circulating device by water filling sebific duct, for using
Law of connected vessels (purpose and effect of water filling: is filled the water for test specimen tube sink to water filling in container, can supplement sink in real time
In moisture, and tank water invariant position is kept, to facilitate manufacture frozen soil sample；The principle of water filling: the principle of linker, according to
Difference in height is filled the water)；Electrode patch is thin copper electrode patch, is pasted onto container inner wall by glue；It is being packed into sample frozen soil
When, the conducting resinl on the side figure of electrode patch contact sample, to increase being electrically connected between electrode patch and sample frozen soil
Property, to reduce the resistance of contact surface；
Electrode patch is mounted on container inner wall, specially divides the container into several layers, and every alternating floor is mounted on several electricity
Pole patch, electrode patch is by electrode connecting line and logic controller (PLC) and externally measured connection, for obtaining the electricity of input
The electric signal of source signal or output for measurement；The resistivity of layer where electrode patch is used to measure by vanderburg method；Than
As depicted in figs. 1 and 2, electrode patch is mounted on container inner wall, divides the container into 20 layers, every alternating floor is mounted on 4 electricity
Pole patch (the electrode patch scheme of installation for being illustrated in figure 2 a certain layer), first electrode patch A1 and third electrode patch A3
Connecting line by the center of circle of place layer, the connecting line of second electrode patch A2 and the 4th electrode patch A4 pass through the circle at place layer
The heart, first electrode patch are equal to third electrode patch at a distance from the 4th electrode patch at a distance from second electrode patch；
External measurement device then includes power module, voltage measurement module and current measurement module；Power module is for giving
The electrode slice of device is powered；Voltage measurement module is used for the voltage signal of measuring electrode patch；Current measurement module is used for
Measure the current signal of motor patch.Logic controller (PLC) aims at a kind of electricity of digital operation of industrial production design
Sub-device, it is used for its internally stored program using a kind of programmable memory, executes logical operation, sequential control.In reality
Before testing, the electrode wires of measurement module and external measurement device are respectively coupled to the both ends of logic controller (PLC), are then passed through
Host computer (computer) executes process control to logic controller, enables two terminal circuit of logic controller automatically according to program
Set connection, respectively to device power supply, measure voltage signal and current signal between device respective electrode piece.
It is illustrated in figure 3 the measurement method flow diagram of measuring device of the invention: this frozen soil provided by the invention
The measurement method for not freezing the measuring device of water Transport, includes the following steps:
S1. it is only packed into the soil pattern of one layer of known moisture content in measuring device, and does not enable low-temperature circulating device and note
Water module；
S2. it measures using vanderburg method and obtains the soil pattern resistivity of single layer；
S3. the soil pattern of water content identical as step S1 is filled in test device, and do not enable low-temperature circulating device and
Water injection module；
S4. the soil pattern resistivity of layer where measuring using vanderburg method and obtain electrode patch；
S5. the electrode patch place layer obtained according to the soil pattern resistivity of the obtained single layer of step S2 and step S4
Soil pattern resistivity, the correction factor of layer where calculating each electrode patch；Specially it is calculated respectively using following formula
The correction factor of layer where a electrode patch:
μ in formulaiFor the correction factor of layer where i-th layer of motor patch, riFor the soil examination of layer where i-th layer of electrode patch
Sample resistivity, r are the soil pattern resistivity of single layer；
S6. the soil pattern of water content identical as step S1 is filled in test device, sets the temperature of low-temperature circulating device
With the water injection rate of water injection module, and start low-temperature circulating device and water injection module, to obtain frozen soil sample；
S7. the test frozen soil sample resistivity of layer where measuring using vanderburg method and obtain electrode patch；
S8. according to the correction factor of the obtained each electrode patch place layer of step S5, the electrode paste that step S7 is obtained
The test frozen soil sample resistivity of layer is modified where piece, to obtain the true frozen soil sample resistance of layer where electrode patch
Rate；The correction factor of layer, the electrode patch obtained multiplied by step S7 where each electrode patch that specially step S5 is obtained
The test frozen soil sample resistivity of place layer, to obtain the true frozen soil sample resistivity of layer where electrode patch；
S9. according to the true frozen soil sample resistivity of the obtained electrode patch place layer of step S8, electrode patch institute is calculated
In the unfrozen water content of the frozen soil sample of layer；The frozen soil sample of layer where specially calculating electrode patch using following formula is not
Freeze water content:
ρ is the resistivity of the frozen soil sample of layer where electrode patch, θ in formulavThe frozen soil sample of layer where electrode patch
The content for not freezing water；
S10. according to the time of measuring point of setting, step S7~S9 is repeated, to obtain the frozen soil of layer where electrode patch
The curve that the unfrozen water content of sample changes over time；
S11. the unfrozen water content of the frozen soil sample of layer changes over time where the electrode patch obtained according to step S10
Curve, analysis frozen soil do not freeze the Transport of water.
During above-mentioned step, using vanderburg method measured resistivity, following steps measured resistivity is specially used:
A. four electrode patch connected for frozen soil sample, are infused between first electrode patch and second electrode patch
Enter constant current IA1-A2, and measure the voltage V between third electrode patch and the 4th electrode patchA3-A4, to obtain the first electricity
Resistance value
B. four electrode patch connected for frozen soil sample, are infused between second electrode patch and third electrode patch
Enter constant current IA2-A3, and measure the voltage V between the 4th electrode patch and first electrode patchA4-A1, to obtain the second electricity
Resistance value
C. electricalresistivityρ is calculated using following formula:
R in formula1For first resistor value, R2For second resistance value, d is the diameter of container.
Claims (10)
1. the measuring device that a kind of frozen soil does not freeze water Transport, it is characterised in that if container, controller including both ends open,
Dry electrode patch, several electrode connecting lines, low-temperature circulating device, host computer, external measurement device and water injection module；Low-temperature circulating device
Including the first low-temperature circulating plate interconnected and the second low-temperature circulating plate, the first low-temperature circulating plate is mounted on the appearance of both ends open
One end of device, the second low-temperature circulating plate are mounted on the other end of the container of both ends open, and low-temperature circulating device is used to hold to being placed on
Frozen soil sample in device carries out temperature control；One end connection electrode connecting line of controller, and electricity is connected by electrode connecting line
Pole patch；The other end of controller is directly connected to external measurement device；Controller is used for the work of coordination electrode patch, and obtains
The electric signal for measurement of electrode patch output；Electrode patch is mounted on container inner wall, and pass sequentially through electrode connecting line and
Controller connects external measurement device, for obtaining the electric signal of the power supply signal or output of input for measurement；Fill the water mould
Block connects the water filling port of low-temperature circulating device, for filling the water in container；External measurement device is used to power to controller, provides defeated
The power supply signal entered, and the electric signal for measurement that electrode patch exports is obtained by controller；Host computer and controller
Connection, for passing through the work of controller coordination electrode patch, and the temperature of control low-temperature circulating device.
2. the measuring device that frozen soil according to claim 1 does not freeze water Transport, it is characterised in that the water filling mould
Block includes horse trie Austria's bottle and water filling sebific duct；Horse trie Austria's bottle connects the water filling port of low-temperature circulating device by water filling sebific duct, is used for
To being filled the water in container.
3. the measuring device that frozen soil according to claim 2 does not freeze water Transport, it is characterised in that open at the both ends
The container of mouth is round and both ends open lucite cylinder；The electrode patch is mounted on container inner wall, will specially hold
Device is divided into several layers, and every alternating floor is mounted on several electrode patch, and electrode patch is by electrode connecting line and controller and outside
Portion's measurement connection, for obtaining the electric signal of the power supply signal or output of input for measurement；Electrode patch is for passing through model
The resistivity of layer where De Baofa measurement.
4. the measuring device that frozen soil according to claim 3 does not freeze water Transport, it is characterised in that the electrode paste
Piece is mounted on container inner wall, specially divides the container into 20 layers, every alternating floor is mounted on 4 plate electrode patches, first electrode patch
By the center of circle of place layer, the connecting line of second electrode patch and the 4th electrode patch leads to the connecting line of piece and third electrode patch
The center of circle of layer where crossing, first electrode patch are equal to third electrode patch and the 4th electrode patch at a distance from second electrode patch
Distance.
5. the measuring device that frozen soil described according to claim 1~one of 4 does not freeze water Transport, it is characterised in that described
Electrode patch is thin copper electrode patch, and is mounted on container inner wall, and specially electrode patch is pasted onto container by glue
Wall.
6. frozen soil described in a kind of one of Claims 1 to 5 does not freeze the measurement method of the measuring device of water Transport, including such as
Lower step:
S1. it is only packed into the soil pattern of one layer of known moisture content in measuring device, and does not enable low-temperature circulating device and water filling mould
Block；
S2. it measures using vanderburg method and obtains the soil pattern resistivity of single layer；
S3. the soil pattern of water content identical as step S1 is filled in test device, and does not enable low-temperature circulating device and water filling
Module；
S4. the soil pattern resistivity of layer where measuring using vanderburg method and obtain electrode patch；
S5. the soil of the electrode patch place layer obtained according to the soil pattern resistivity of the obtained single layer of step S2 and step S4
Sample resistivity, the correction factor of layer where calculating each electrode patch；
S6. the soil pattern of water content identical as step S1 is filled in test device, sets the temperature and note of low-temperature circulating device
The water injection rate of water module, and start low-temperature circulating device and water injection module, to obtain frozen soil sample；
S7. the test frozen soil sample resistivity of layer where measuring using vanderburg method and obtain electrode patch；
S8. according to the correction factor of the obtained each electrode patch place layer of step S5, the electrode patch institute that step S7 is obtained
It is modified in the test frozen soil sample resistivity of layer, to obtain the true frozen soil sample resistivity of layer where electrode patch；
S9. according to the true frozen soil sample resistivity of the obtained electrode patch place layer of step S8, layer where electrode patch is calculated
Frozen soil sample unfrozen water content；
S10. according to the time of measuring point of setting, step S7~S9 is repeated, to obtain the frozen soil sample of layer where electrode patch
The curve that changes over time of unfrozen water content；
S11. the song that the unfrozen water content of the frozen soil sample of layer where the electrode patch obtained according to step S10 changes over time
Line, analysis frozen soil do not freeze the Transport of water.
7. measurement method according to claim 6, it is characterised in that use vanderburg method measured resistivity, specially use
Following steps measured resistivity:
A. four electrode patch connected for frozen soil sample inject permanent between first electrode patch and second electrode patch
Constant current IA1-A2, and measure the voltage V between third electrode patch and the 4th electrode patchA3-A4, to obtain first resistor value
B. four electrode patch connected for frozen soil sample inject permanent between second electrode patch and third electrode patch
Constant current IA2-A3, and measure the voltage V between the 4th electrode patch and first electrode patchA4-A1, to obtain second resistance value
C. electricalresistivityρ is calculated using following formula:
R in formula1For first resistor value, R2For second resistance value, d is the diameter of container.
8. measurement method according to claim 7, it is characterised in where each electrode patch of calculating described in step S5
The correction factor of layer, the correction factor of layer where each electrode patch specially is calculated using following formula:
μ in formulaiFor the correction factor of layer where i-th layer of motor patch, riFor the soil pattern electricity of layer where i-th layer of electrode patch
Resistance rate, r are the soil pattern resistivity of single layer.
9. measurement method according to claim 8, it is characterised in that obtained described in step S8 according to step S5 each
The correction factor of layer where electrode patch, the test frozen soil sample resistivity of layer carries out where the electrode patch obtained to step S7
Amendment, the correction factor of layer, the electrode paste obtained multiplied by step S7 where each electrode patch for specially obtaining step S5
The test frozen soil sample resistivity of layer where piece, to obtain the true frozen soil sample resistivity of layer where electrode patch.
10. measurement method according to claim 9, it is characterised in that layer where calculating electrode patch described in step S9
The unfrozen water content of frozen soil sample, the water that do not freeze of the frozen soil sample of layer contains where specially calculating electrode patch using following formula
Amount:
ρ is the resistivity of the frozen soil sample of layer where electrode patch, θ in formulavThe frozen soil sample of layer does not freeze where electrode patch
The content of water.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910656271.5A CN110333269B (en) | 2019-07-19 | 2019-07-19 | Nondestructive measuring device and method for frozen soil moisture migration rule |
| GB2010910.4A GB2587892B (en) | 2019-07-19 | 2020-07-15 | Apparatus for non-destructively measuring water migration law of frozen soil and measurement method thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910656271.5A CN110333269B (en) | 2019-07-19 | 2019-07-19 | Nondestructive measuring device and method for frozen soil moisture migration rule |
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| Publication Number | Publication Date |
|---|---|
| CN110333269A true CN110333269A (en) | 2019-10-15 |
| CN110333269B CN110333269B (en) | 2022-04-08 |
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| CN110823781A (en) * | 2019-11-22 | 2020-02-21 | 山东大学 | Multifunctional roadbed soil moisture migration experiment model box and experiment method |
| GB2587892A (en) * | 2019-07-19 | 2021-04-14 | Univ Central South | Apparatus for non-destructively measuring water migration law of frozen soil and measurement method thereby |
| CN114460088A (en) * | 2021-12-22 | 2022-05-10 | 吉林大学 | Soil freezing-thawing cycle simulation device and NAPL phase migration quantitative identification method |
| CN117054315A (en) * | 2023-10-13 | 2023-11-14 | 东北林业大学 | Frozen soil permeability coefficient measurement system |
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| CN113419044B (en) * | 2021-06-02 | 2022-03-22 | 中国科学院西北生态环境资源研究院 | Method for calculating unfrozen water content of frozen soil based on clay diffusion layer ion concentration gradient |
| CN117990889B (en) * | 2024-04-03 | 2024-06-14 | 西南石油大学 | Method for determining unfrozen water content of unsaturated soil |
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| CN117054315A (en) * | 2023-10-13 | 2023-11-14 | 东北林业大学 | Frozen soil permeability coefficient measurement system |
| CN117054315B (en) * | 2023-10-13 | 2024-01-09 | 东北林业大学 | Frozen soil permeability coefficient measurement system |
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| GB2587892A (en) | 2021-04-14 |
| CN110333269B (en) | 2022-04-08 |
| GB202010910D0 (en) | 2020-08-26 |
| GB2587892B (en) | 2021-11-24 |
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