CN108896467A - A kind of method and device of dynamic measurement porosity of soil - Google Patents
A kind of method and device of dynamic measurement porosity of soil Download PDFInfo
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- CN108896467A CN108896467A CN201810988855.8A CN201810988855A CN108896467A CN 108896467 A CN108896467 A CN 108896467A CN 201810988855 A CN201810988855 A CN 201810988855A CN 108896467 A CN108896467 A CN 108896467A
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- 239000002689 soil Substances 0.000 title claims abstract description 104
- 238000005259 measurement Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910052704 radon Inorganic materials 0.000 claims abstract description 43
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000009792 diffusion process Methods 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007373 indentation Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 5
- 229910052753 mercury Inorganic materials 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000000214 mouth Anatomy 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000003466 welding 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
- 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
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Radiation (AREA)
Abstract
The present invention provides a kind of method and device of dynamic measurement porosity of soil, the present invention passes through the changing rule using radon consistence in closed loop gas circuit measuring device, change measuring device volume and obtain the variation of radon consistence in measuring device under different measurement volumes, porosity of soil can be calculated.The changing rule of radon consistence considers the Effective Decay Constant of radon in measuring device, wherein including the decay coefficient of radon, leadage coefficient and back-diffusion coefficient, accurate porosity of soil η can be calculated, measurement accuracy is high.The present invention carries out nonlinear fitting using the value of n measurement period in measuring device, without waiting radon consistence in devices to stablize, saves time of measuring, sampled measurements process and calculation method are simple, reduce measurement difficulty, have saved measurement cost.
Description
Technical field
The present invention relates to a kind of radiation detection technology, especially a kind of method and device of dynamic measurement porosity of soil.
Background technique
Porosity of soil is the ratio that pore volume between soil particle accounts for soil total volume.Porosity of soil is reflection
One important indicator of soil characteristic.Measurement porosity of soil has experience calculating method, mercury penetration method, soil to hold in the prior art
Weight and specific gravity calculating method, image treating and volume differences calculating method etc., but have certain limitation, there are measurement accuracy
The problems such as not high, the data error of acquisition is larger, complicated for operation.
Empirical Calculating Method is converted by the index (natural density, water content, the severe of specific density of solid particles, water) of other soil
It gets, majority parameters (natural density, water content, specific density of solid particles) have error in measurement process, and convert process
In error can amplify, and measuring process is comparatively laborious, therefore the data inaccuracy that conversion is got, and this method be suitable for it is real
Room operation is tested, engineering site application is not suitable for.Mercury penetration method will use mercury PORE SIZE APPARATUS FOR due to needing pressure to act on, and
Be not suitable for the soil softer applied to soil property, dissipate because may result in soil sample and pressed by pressure, be generally used in this way
Carry out the pore analysis of harder solid.In addition, mercury and instrument price are high, it is higher using experimentation cost when the method, and
And mercury belongs to toxic chemical, improper use can cause damages to experimenter and environment.Image treating installation cost and make
Expense is all higher, and the preferable mechanism that only has ready conditions just uses, and general Study personnel often do not have such condition.Air pressure specific gravity
Meter method measurement period is long, complicated for operation, is unable to satisfy the needs of real time information acquisition, significantly limits its practical application.
For different soils quality, soil particle density difference is objective reality for the soil weight and specific gravity calculating method.And determine different soil
The soil particle density on loamy texture ground is time-consuming, and usually using the bulk density of quartz sand sample as exemplary reference value, this is virtually increased by
The error of measurement data.
Patent document CN107741391A discloses a kind of method for measuring porosity of soil, utilizes resistivity and soil
Relationship between porosity obtains porosity of soil by measurement soil resistivity, and this method is during sampled measurements
Soil original structure need not be destroyed, can retain the elements such as original density, the water content of soil to the maximum extent, but this side
Method still has calculating complexity, needs the relational model first established between porosity of soil and soil resistivity, and model is thick
Slightly estimate model, introduces error, influence computational accuracy.
Summary of the invention
Object of the present invention is to overcome the above-mentioned deficiency of the prior art, provide a kind of dynamic measurement porosity of soil method and
Device, this method can obtain accurate soil porosity quickly through simple calculation method.The present invention is by utilizing closed loop
The changing rule of radon consistence in gas circuit measuring device changes measuring device volume and obtains under different measurement volumes radon in measuring device
The variation of concentration, with Nonlinear Quasi hop algorithm, without etc. in measuring devices radon consistence stablize, soil aperture can be calculated
Rate saves time of measuring.The changing rule of radon consistence considers the Effective Decay Constant of radon in measuring device, wherein including radon
Decay coefficient, accurate porosity of soil η can be calculated in leadage coefficient and back-diffusion coefficient, and measurement accuracy is high.This hair
The bright value using n measurement period in measuring device carries out nonlinear fitting, without waiting radon consistence in devices to stablize, saves survey
The time is measured, sampled measurements process and calculation method are simple, reduce measurement difficulty, have saved measurement cost.
The specific technical solution of the present invention is：
The present invention provides a kind of method of dynamic measurement porosity of soil, it is characterised in that：Including sampling process and measurement
Calculating process.
S1：Measurement process：
Using the steel cutting ring that cutting ring handle volume is V is connected through a screw thread, the soil of nature is cut, soil sample is made
Full of wherein.It can not rock from side to side, so that soil natural structure is not destroyed, until in cutting ring all indentation soil；Then with small
Shovel digs out cutting ring from soil, removes handle, and carefully scabbled along the finishing of cutting ring edges at two ends with pocket knife, cuts off extra soil
Earth；
After the completion of finishing, filter membrane on excellent cutting ring upper end cover will be taken, then lower cover top cover labyrinth is connected by screw thread again
Cutting ring handle is connect, soil cutting device is connect by gas path pipe with emanometer and air pump, and a closed loop gas circuit measurement dress is formed
It sets；
Cutting ring handle can be used as handle for sampling, after being combined into measuring device, in cutting ring after connecting with cutting ring
There is biggish gap between the soil of sampling, enable air-flow uniformly through soil, the radon in soil is uniformly taken out of by air-flow
Come, improves the accuracy of measurement.
S2, survey calculation process：
Radon in measuring system is uniformly mixed by booster air pump, considers leakage and back-diffusion effect, radon consistence in measuring system
Changing rule it is as follows：
In formula, V1It is the volume of sampling soil；V3It is space total volume in measuring system gas circuit and emanometer；When C (t) is
Between be t when measuring system in radon consistence, unit Bqm-3；λeFor Effective Decay Constant, the decay coefficient comprising radon, leakage
Coefficient and back-diffusion coefficient；η is soil porosity, is dimensionless number；A is the generation rate of radon in soil, unit Bqm-3·s-1。
The solution of formula (1) is：
A is arbitrary constant in formula.
For emanometer using T as measurement period, T is 2-20 minutes；N measurement period is measured, n is more than or equal to 3；Each measurement week
The measured value of phase is considered the measured value at measurement period midpoint.
In formula, m is constant, and the present invention provides the value that two kinds of algorithms calculate m：
Algorithm 1：Using the value of first measurement period, it is back-calculated to obtain the value of a in formula (2), then utilizes n measurement period
Value to formula (2) carry out nonlinear fitting, obtainValue m；
Algorithm 2：Nonlinear fitting directly is carried out to formula (2) using the value of n measurement period, is obtainedValue
m。
Stop pump, it is V that a volume is added in measuring system gas circuit4Cavity, starting pump, radon is uniformly mixed, this
When measuring system in the changing rule of radon consistence be：
A is arbitrary constant in formula.
For emanometer using T as measurement period, T is 2-20 minutes；N measurement period is measured, n is more than or equal to 3；Each measurement week
The measured value of phase is considered the measured value at measurement period midpoint.
In formula, k is constant.
Algorithm 1：Using the value of first measurement period, it is back-calculated to obtain the value of a in formula (4), then utilizes n measurement period
Value to formula (4) carry out nonlinear fitting, obtainValue k；
Algorithm 2：Nonlinear fitting directly is carried out to formula (4) using the value of n measurement period, is obtainedValue
k。
Relevant parameter is substituted into formula (3), formula (5) solves, so that it may obtain porosity of soil.
The present invention further provides a kind of devices of dynamic measurement porosity of soil, it is characterised in that：
The measuring device is closed loop gas path device, passes through gas by soil cutting device, sealing cover, air pump and emanometer
It is formed after the connection of road pipeline；
The soil cutting device is made of cutting ring handle, cutting ring.It is opened equipped with annular one end of the cutting ring handle
Oral cavity, the port of annular opening chamber are equipped with stepped hole, and the port of stepped hole is equipped with the internal screw thread connecting with cutting ring, annular opening chamber
Bottom centre be equipped with centre bore, the other end of cutting ring handle is welded with the straight pipe communicated with centre bore, straight pipe
The other end is welded with a straight tube handle open at one end closed at one end, the inner hole phase of gas vent and straight pipe on straight tube handle
It is logical.Straight tube handle gas vent is connected by one end of gas path pipe and air pump, the other end of the air pump by gas path pipe with
One end of emanometer connects, and the other end of the emanometer is connect by gas path pipe with the straight pipe on sealing cover.
One end of the cutting ring is equipped with the edge of a knife, and the other end of cutting ring is equipped with the external screw thread connecting with cutting ring handle.
The sealing cover has gasket, and the sealing cover center is equipped with centre bore, and centre bore is welded with straight pipe, directly
Siphunculus is connect by gas path pipe with emanometer, and the sealing cover is covered in one end that cutting ring has the edge of a knife.
The external screw thread is not higher than cutting ring outer surface.
The cutting ring handle and cutting ring junction are an inclined-planes.
Cutting ring handle can be used as handle for sampling after connecting with cutting ring, annular opening chamber is arranged on cutting ring handle, when
After being combined into measuring device, and there is biggish gap between the soil that samples in cutting ring, enables air-flow uniformly through soil, it will
Radon in soil is uniformly brought out by air-flow, improves the accuracy of measurement.
The present invention has following features compared with prior art：
1, the present invention establishes changing rule formula using the changing rule of radon consistence in closed loop gas circuit measuring device, changes
Measuring device volume obtains the variation of radon consistence in measuring device under different measurement volumes, and porosity of soil η is calculated.This hair
In the method for bright offer, the changing rule formula of radon consistence considers the Effective Decay Constant of radon in measuring device, wherein including
More accurate porosity of soil η can be calculated in the decay coefficient of radon, leadage coefficient and back-diffusion coefficient.
2, the present invention carries out nonlinear fitting using the value of n measurement period in measuring device, without waiting radon in devices dense
Degree stablize, save time of measuring, sampled measurements process and calculation method are simple, reduce measurement difficulty, saved measurement at
This.
3, cutting ring handle and cutting ring junction are an inclined-planes, are sampled convenient for cutting ring, firmly more uniform in sampling, are kept away
Exempt to rock from side to side, so that soil natural structure is not destroyed.
4, cutting ring handle can be used as handle for sampling, after being combined into measuring device, with cutting ring after connecting with cutting ring
There is biggish gap between the soil of interior sampling, enable air-flow uniformly through soil, the radon in soil is passed through into air-flow homogeneous band
Out, the accuracy of measurement is improved.
Detailed description of the invention
Fig. 1 is measuring device schematic diagram provided by the invention；
Fig. 2 is the structural schematic diagram of soil cutting device；
Fig. 3 is the A-A cross-sectional view in attached drawing 2；
Fig. 4 is the structural schematic diagram of cutting ring handle；
Fig. 5 is the B-B cross-sectional view in attached drawing 4；
Fig. 6 is the structural schematic diagram of cutting ring；
Fig. 7 is the C-C cross-sectional view in attached drawing 6；
Fig. 8 is the structural schematic diagram of sealing cover；
Fig. 9 is the D-D cross-sectional view of attached drawing 8.
Wherein：1 is soil cutting device, and 2 be air pump, and 3 be emanometer, and 4 be soil, and 5 be filter membrane, and 6 be sealing cover, and 7 are
Gas path pipe, 1-1 are cutting ring handle, and 1-2 is cutting ring, and 1-1-1 is annular opening chamber, and 1-1-2 is stepped hole, and 1-1-3 is interior spiral shell
Line, 1-1-4 are center hole, and 1-1-5 is straight pipe, and 1-1-6 is straight tube handle, and 1-2-1 is the edge of a knife, and 1-2-2 is external screw thread, 6-1
For center hole, 6-2 is straight pipe.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The present invention provides a kind of method of dynamic measurement porosity of soil, it is characterised in that：Including sampling process and measurement
Calculating process.
S1, sampling process：
Using the steel cutting ring 1-2 that cutting ring handle 1-1 volume is V is connected through a screw thread, the soil of nature is cut,
Make soil sample full of wherein.It can not rock from side to side, so that soil natural structure is not destroyed, until in cutting ring 1-2 all indentation soil.
Then cutting ring 1-2 is dug out with scuppit from soil, removes cutting ring handle 1-1, and carefully repaired along cutting ring 1-2 edges at two ends with pocket knife
It is whole to scabble, cut off extra soil.
After the completion of finishing, filter membrane 5 on excellent cutting ring 1-2 upper end cover will be taken, then lower cover top cover labyrinth 6 passes through again
It is threadedly coupled cutting ring handle 1-1 and forms soil cutting device 1, soil cutting device 1 is gentle by gas path pipe 7 and emanometer 3
2 connection of pump, forms a closed loop gas circuit measuring device.
Cutting ring handle 1-1 can be used as handle and be used to sample after connecting with cutting ring 1-2, after being combined into measuring device, with
There is biggish gap between the soil sampled in cutting ring 1-2, enables air-flow uniformly through soil, the radon in soil is passed through into air-flow
It uniformly brings out, improves the accuracy of measurement.
S2, survey calculation process：
Radon in measuring system is uniformly mixed by booster air pump 2, considers leakage and back-diffusion effect, radon is dense in measuring system
The changing rule of degree is as follows：
In formula, V1It is the volume of sampling soil；V3It is space total volume in measuring device gas circuit and emanometer；When C (t) is
Between be t when measuring system in radon consistence, Bqm-3；λeFor Effective Decay Constant, the decay coefficient comprising radon, leadage coefficient and
Back-diffusion coefficient.
The solution of formula (1) is：
A is arbitrary constant in formula.
For emanometer using T as measurement period, T is 2-20 minutes；N measurement period is measured, n is more than or equal to 3；Each measurement week
The measured value of phase is considered the measured value at measurement period midpoint.
In formula, m is constant.
Algorithm 1：Using the value of first measurement period, it is back-calculated to obtain the value of a in formula (2), then utilizes n measurement period
Value to formula (2) carry out nonlinear fitting, obtainValue m：
Algorithm 2：Nonlinear fitting directly is carried out to formula (2) using the value of n measurement period, is obtained's
Value m.
Stop air pump 2, it is V that a volume is added in measuring device gas circuit4Cavity, booster air pump 2 mixes radon equal
Even, the changing rule of radon consistence is in measuring device at this time：
A is arbitrary constant in formula.
For emanometer using T as measurement period, T is 2-20 minutes；N measurement period is measured, n is more than or equal to 3；Each measurement week
The measured value of phase is considered the measured value at measurement period midpoint.
In formula, k is constant.
Algorithm 1：Using the value of first measurement period, it is back-calculated to obtain the value of a in formula (4), then utilizes n measurement period
Value to formula (4) carry out nonlinear fitting, obtainValue k：
Algorithm 2：Nonlinear fitting directly is carried out to formula (5) using the value of n measurement period, is obtained's
Value k.
Relevant parameter is substituted into formula (3), formula (5) solves, so that it may obtain porosity of soil η.
The present invention further provides a kind of devices of dynamic measurement porosity of soil porosity of soil, it is characterised in that：
The measuring device is closed loop gas path device, is led to by soil cutting device 1, air pump 2, emanometer 3 and sealing cover 6
It crosses after gas path pipe 7 connects and forms；
Straight tube handle 1-1-6 gas vent on the soil cutting device 1 is connected by one end of gas path pipe 7 and air pump 2
It connects, the other end of the air pump 2 is connect by gas path pipe 7 with one end of emanometer 3, and the other end of the emanometer 3 passes through
Gas path pipe 7 is connect with the straight pipe 6-2 on sealing cover 6.
The soil cutting device 1 is made of cutting ring handle 1-1, cutting ring 1-2.One end of the cutting ring handle 1-1
Equipped with annular opening chamber 1-1-1, the port of annular opening chamber 1-1-1 is equipped with stepped hole 1-1-2, and the port of stepped hole 1-1-2 is set
There is the internal screw thread 1-1-3 connecting with cutting ring 1-2, the bottom centre of annular opening chamber 1-1-1 is equipped with centre bore 1-1-4, cutting ring hand
The other end of handle 1-1 is welded with the straight pipe 1-1-5 communicated with centre bore 1-1-4, the other end welding of straight pipe 1-1-5
There is a straight tube handle 1-1-6 open at one end closed at one end, the gas vent on straight tube handle 1-1-6 is with straight pipe 1-1-5's
Inner hole communicates.One end of the cutting ring 1-2 is equipped with edge of a knife 1-2-1, and the other end of cutting ring 1-2 is equipped with to be connected with cutting ring handle 1-1
The external screw thread 1-2-2 connect.
The sealing cover 6 has gasket, and 6 center of the sealing cover is equipped with centre bore 6-1, and centre bore is welded with straight-through
Pipe 6-2, straight pipe 6-2 are connect by gas path pipe 7 with emanometer 3, and sealing cover 6 covers have edge of a knife 1-2-1 in cutting ring 1-2 one
End.
The cutting ring handle 1-1 can be used as handle for sampling after connecting with cutting ring 1-2.
The external screw thread 1-2-2 is not higher than the outer surface cutting ring 1-2.
The cutting ring handle 1-1 and the junction cutting ring 1-2 are an inclined-planes.
It is it and have between the soil that samples in cutting ring 1-2 that the effect of annular opening chamber 1-1-1 is arranged on cutting ring handle 1-1
Biggish gap, enables air-flow uniformly through soil, and the radon in soil is uniformly brought out by air-flow, improves the standard of measurement
True property.
The preferred embodiment of the patent is described in detail above, but this patent is not limited to above-mentioned embodiment party
Formula within the knowledge of one of ordinary skill in the art can also be under the premise of not departing from this patent objective
It makes a variety of changes.
Claims (6)
1. a kind of method of dynamic measurement porosity of soil, it is characterised in that：Including sampling process and survey calculation process,
S1, sampling process：
Using the steel cutting ring 1-2 for being connected through a screw thread cutting ring handle 1-1, volume is V, the soil of nature is cut, is made
Soil sample is full of wherein；It can not rock from side to side, so that soil natural structure is not destroyed, until in cutting ring 1-2 all indentation soil；So
Cutting ring 1-2 is dug out with scuppit from soil afterwards, removes cutting ring handle 1-1, and carefully modified along cutting ring 1-2 edges at two ends with pocket knife
It scabbles, cuts off extra soil；
After the completion of finishing, filter membrane 5 on excellent cutting ring 1-2 upper end cover will be taken, then lower cover top cover labyrinth 6 passes through screw thread again
It connects cutting ring handle 1-1 and forms soil cutting device 1, soil cutting device 1 is connected by gas path pipe 7 and emanometer 3 and air pump 2
It connects, forms a closed loop gas circuit measuring device；
S2, survey calculation process：
Radon in measuring system is uniformly mixed by booster air pump 2, considers leakage and back-diffusion effect, radon consistence in measuring system
Changing rule is as follows：
In formula, V1It is the volume of sampling soil；V3It is space total volume in measuring device gas circuit and emanometer；It is t that C (t), which is the time,
When measuring system in radon consistence, unit Bqm-3；λeFor Effective Decay Constant, the decay coefficient comprising radon, leadage coefficient
And back-diffusion coefficient；
The solution of formula (1) is：
A is arbitrary constant in formula；
For emanometer using T as measurement period, T is 2-20 minutes；N measurement period is measured, n is more than or equal to 3；Each measurement period
Measured value is considered the measured value at measurement period midpoint；
In formula, m is constant, and the value of m is calculated using any one following algorithm：
Algorithm 1：Using the value of first measurement period, it is back-calculated to obtain the value of a in formula (2), then utilizes the value of n measurement period
Nonlinear fitting is carried out to formula (2), is obtainedValue m；
Algorithm 2：Nonlinear fitting directly is carried out to formula (2) using the value of n measurement period, is obtainedValue m；
Stop air pump 2, it is V that a volume is added in measuring device gas circuit4Cavity, radon is uniformly mixed by booster air pump 2, this
When measuring device in the changing rule of radon consistence be：
A is arbitrary constant in formula；
For emanometer using T as measurement period, T is 2-20 minutes；N measurement period is measured, n is more than or equal to 3；Each measurement period
Measured value is considered the measured value at measurement period midpoint；
In formula, k is constant, and the value of k is calculated using any one following algorithm：
Algorithm 1：Using the value of first measurement period, it is back-calculated to obtain the value of a in formula (4), then utilizes the value of n measurement period
Nonlinear fitting is carried out to formula (4), is obtainedValue k；
Algorithm 2：Nonlinear fitting directly is carried out to formula (5) using the value of n measurement period, is obtainedValue k；
Relevant parameter is substituted into formula (3), formula (5) solves, so that it may obtain porosity of soil η.
2. a kind of device of dynamic measurement porosity of soil, it is characterised in that：The measuring device is closed loop gas path device, by
Soil cutting device, sealing cover, air pump and emanometer form after being connected by gas path pipe；
The soil cutting device is made of cutting ring handle, cutting ring, and one end of the cutting ring handle is equipped with annular opening chamber, institute
The port for stating annular opening chamber is equipped with stepped hole, and the port of the stepped hole is equipped with the internal screw thread connecting with the cutting ring, described
The bottom centre of annular opening chamber be equipped with centre bore, the other end of the cutting ring handle be welded with one communicated with centre bore it is straight
Siphunculus, the other end of the straight pipe are welded with a straight tube handle open at one end closed at one end, on the straight tube handle
Gas vent is communicated with the inner hole of straight pipe；One end of the cutting ring is equipped with the edge of a knife, and the other end of the cutting ring is equipped with and the ring
The external screw thread of knife handle connection；The straight tube handle gas vent is connect by gas path pipe with one end of the air pump, the gas
The other end of pump connect by gas path pipe with one end of the emanometer, the other end of the emanometer pass through gas path pipe and
The sealing cover connection.
3. the device of dynamic measurement porosity of soil according to claim 2, it is characterised in that：The sealing cover center is set
There is centre bore, centre bore is welded with straight pipe, and straight pipe is connect by gas path pipe with emanometer, and sealing cover, which is covered, has knife in cutting ring
One end of mouth.
4. the device of dynamic measurement porosity of soil according to claim 2, it is characterised in that：The sealing cover is with sealing
Pad.
5. the device of dynamic measurement porosity of soil according to claim 2, it is characterised in that：The external screw thread is not higher than cutting ring
Outer surface.
6. the device of dynamic measurement porosity of soil according to claim 2, it is characterised in that：The cutting ring handle and cutting ring connect
Meeting place is an inclined-plane.
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|---|---|---|---|
| CN201810988855.8A CN108896467B (en) | 2018-08-28 | 2018-08-28 | Method and device for dynamically measuring soil porosity |
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|---|---|---|---|
| CN201810988855.8A CN108896467B (en) | 2018-08-28 | 2018-08-28 | Method and device for dynamically measuring soil porosity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060633A (en) * | 2018-09-14 | 2018-12-21 | 衡阳师范学院 | A kind of method and device of static measurement porosity of soil |
| CN110595976A (en) * | 2019-08-07 | 2019-12-20 | 中国水利水电科学研究院 | Experimental device and method for rapidly measuring porosity of soil in field |
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