CN105866001A - Device and method for measuring rock-soil body osmotic coefficient based on water-based fluorescent agent dilution method - Google Patents
Device and method for measuring rock-soil body osmotic coefficient based on water-based fluorescent agent dilution method Download PDFInfo
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- CN105866001A CN105866001A CN201610238984.6A CN201610238984A CN105866001A CN 105866001 A CN105866001 A CN 105866001A CN 201610238984 A CN201610238984 A CN 201610238984A CN 105866001 A CN105866001 A CN 105866001A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000002689 soil Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003204 osmotic effect Effects 0.000 title claims abstract description 21
- 238000003113 dilution method Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 9
- 239000011435 rock Substances 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000001917 fluorescence detection Methods 0.000 claims abstract description 17
- 239000011521 glass Substances 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 229920005479 Lucite® Polymers 0.000 claims description 35
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 35
- 239000003085 diluting agent Substances 0.000 claims description 21
- 230000008595 infiltration Effects 0.000 claims description 21
- 238000001764 infiltration Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 238000010790 dilution Methods 0.000 claims description 9
- 239000012895 dilution Substances 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 9
- 230000000740 bleeding effect Effects 0.000 claims description 8
- 231100000252 nontoxic Toxicity 0.000 claims description 8
- 230000003000 nontoxic effect Effects 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000035945 sensitivity Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 238000005325 percolation Methods 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 230000004313 glare Effects 0.000 claims description 4
- 230000000873 masking effect Effects 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 229920005372 Plexiglas® Polymers 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims 1
- 230000008859 change Effects 0.000 description 8
- 238000001259 photo etching Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007903 penetration ability Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009897 systematic effect Effects 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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a device and method for measuring the rock-soil body osmotic coefficient based on a water-based fluorescent agent dilution method. The device comprises a liquid supplying tank, the bottom of the liquid supplying tank is connected with a water inlet pipe, a water check valve is mounted on the water inlet pipe, an organic glass barrel is placed under the water inlet pipe, the organic glass barrel is filled with a to-be-detected rock and soil sample, a gravel layer is arranged on the top layer of the to-be-detected rock and soil sample, and a permeable gauze element and a steel wire filter screen are arranged on the bottom layer of the to-be-detected rock and soil sample; air exhausting devices are symmetrically arranged at the bottom of the organic glass barrel; a fluorescent agent putting device is arranged at the bottom of the organic glass barrel and connected with a florescence detector control terminal through a data acquisition unit; the fluorescent agent putting device is connected with a fluorescence detection sub-system; a temperature control system is arranged at the outer side of the organic glass barrel; a liquid outlet pipe is arranged at the bottom of the organic glass barrel, and a liquid containing tank is arranged under the liquid outlet pipe. The seepage velocity is directly obtained by measuring the concentration of a fluorescent agent, wherein the fluorescence concentration is achieved through the fluorescence detection sub-system.
Description
Technical field
The invention belongs to Geotechnical Engineering field, being specifically related to a kind of laboratory measurement Rock And Soil sample infiltration is
The device and method of number.
Background technology
Rock And Soil seepage flow is to affect side slope foundation ditch, the storehouse very important factor of bank stability of earth dams, therefore by test
Obtain soil body permeability parameter accurately and there is important engineering significance and scientific research value.French scientist Darcy is led to
Cross great many of experiments, within 1856, propose water Percolation Law Darcy's law in the soil body.Darcy flow instrument is made
For measuring infiltration coefficient conventional instrument, measure coarse-grained soil infiltration coefficient, variable head permeability test with constant head test
Measure fine grained soil infiltration coefficient, use loading penetration to measure cohesive soil infiltration coefficient.Conventional darcy flow
Single character soil mass permeability can only be surveyed, and the flow event of Rock And Soil under complex environment cannot be simulated, measure essence
Degree also has much room for improvement.
The infiltration coefficient of the soil body and native granularity and mineralogical composition, the structure structure of soil, the viscosity of water, and
It is relevant that grogs combines water film thickness.Infiltration coefficient is an important indicator of reflection soil body penetration ability, the most smart
Really measure Rock And Soil infiltration coefficient under different seepage flow working conditions, be the focus that studies for a long period of time of soil test person
Topic.Distinct device, researcher need to be used to propose heterogeneity Rock And Soil for conventional darcy flow instrument
A large amount of seepage tests instrument that can simulate different seepage flow operating mode, the more conventional seepage instrument of its structure is complicated, used principle
Similar.Pressure-measuring pipe is set by soil body penetration container outer wall, piezometric head when measuring seepage stability, infiltration
The water yield measures volume by graduated cylinder, and then calculates soil body osmotic coefficient.Affected by aerial temperature and humidity, pressure-measuring pipe
And moisture can evaporate in process of the test in graduated cylinder.The infiltration coefficient scope of soil is 10-1Cm/s～10-9Between cm/s,
For the soil that permeability is the lowest, conventional method is used to be recorded infiltration coefficient error by moisture Influence of Evaporation relatively big, and
Belong to systematic error, can not eliminate.
Summary of the invention
The purpose of this device is for overcoming above-mentioned the deficiencies in the prior art, it is therefore intended that provide a kind of based on water base glimmering
The Rock And Soil osmotic coefficient investigating device and method of photo etching dilution method.It is dilute that Moser proposes single hole point in nineteen fifty-seven
Interpretation of the law, establishes the relation between fluorescer concentration and seepage velocity in seepage flow dilution:
Immediately arriving at percolation flow velocity by measuring fluorescer concentration, wherein fluorescence intensity is real by fluorescence detection subsystem
Existing.
Fluorescer is excited by the special wavelength light that energy is higher, launches the fluorescence that wavelength ratio excitation wavelength is longer,
And fluorescence intensity meets langbobier law with fluorescer concentration.According to this principle, that chooses is water base glimmering
Photo etching luyor-6200 has stable in properties, non-toxic degradable, the feature that easy detection sensitivity is high, sets up a set of
Can be according to the system of fluorescer concentration real-time determining Rock And Soil seepage velocity.
For achieving the above object, the technical solution adopted in the present invention is: a kind of based on water base fluorescer dilution method
Rock And Soil osmotic coefficient investigating device, it includes liquid supply box, and the bottom of liquid supply box connects water inlet pipe, water inlet
Being provided with water check valve on pipe, organic glass infuser is placed in the underface of water inlet pipe, and the internal filling of lucite cylinder is to be measured
Ground sample, the top layer of described ground sample to be measured is provided with gravel layer, and bottom is provided with permeable gauze and Steel net；
The bottom symmetrical of described lucite cylinder is provided with exhaust apparatus；The bottom of described machine glass infuser is provided with fluorescer
Delivery device, fluorescer delivery device controls terminal by data acquisition unit with fluorescence detector and is connected；Described glimmering
Photo etching delivery device is connected with fluorescence detection subsystem；The outside of described lucite cylinder is provided with temperature control system；
The bottom of described lucite cylinder is provided with drain pipe, and the underface of drain pipe is provided with liquid holding groove.
Described exhaust apparatus includes blast pipe, and blast pipe is provided with air bleeding valve.
Described fluorescer delivery device includes that fluorescer throws in controller and fluorescer agitator automatically；Described fluorescence
Agent automatically throw in controller be connected with fluorescer syringe control fluorescence diluent injection volume；Described fluorescer stirs
Mixing device and include stirring power set, the output shaft of stirring power set is provided with mixing arm speed adjuster, mixing arm control
On the output shaft of device processed, mixing arm is installed.
Described fluorescence detection subsystem includes that ultraviolet LED lamp, ultraviolet LED lamp are arranged on the head supporting buttress shaft,
The power line of described ultraviolet LED lamp is arranged on inside insulation wire casing, and the afterbody of described support buttress shaft is provided with photosensitive
Resistance, supports and is sequentially installed with concavees lens, convex lens and arrowband from the interlude of its head to afterbody inside buttress shaft
Optical filter；It is machined with inlet opening on support buttress shaft between described concavees lens and convex lens, facilitates fluorescent liquid to enter.
Described temperature control system includes temperature sensor, compressor and heat-transfer pipe, and described temperature sensor uses Pt100
RTD is used for detecting temperature；Described compressor and heat-transfer pipe are for being adjusted temperature control the temperature inside the box；Described
Temperature sensor is connected with main control chip, and described main control chip uses single-chip microcomputer STM32；Described main control chip
The communication of slave computer and computer, described Pt100 RTD and XTR105 is realized by RS232 communication protocol
Combination is converted into stable analog signal amount, and it is defeated that described analog signal amount will be changed into digital quantity by AD7705
Entering main control chip, main control chip just obtains the value of Current Temperatures by calculating；Main control chip through pid algorithm,
Calculating and need to export size of current, write in MAX538 chip, digital quantity is converted by MAX538 chip
For analog input XTR110, thus obtain stable electric current output, control compressor and heat-transfer pipe, reach
Regulation experimental temperature purpose.
Described fluorescence diluent uses water base fluorescer luyor-6200 to have stable in properties, non-toxic degradable, easily
The feature that detection sensitivity is high.
Using item Rock And Soil osmotic coefficient investigating device to carry out Rock And Soil osmotic coefficient investigating method, it includes following
Step:
1) water check valve opened bottom liquid supply box on water inlet pipe, controls the aperture of water check valve and then controls water flow velocity
Degree and discharge, to the internal slowly water supply of lucite cylinder, open temperature control system simultaneously and make lucite cylinder be in
Test under steady temperature environment；
2) water flowed out from water inlet pipe first passes around gravel layer, flows through and oozes under ground sample to be measured, is filtered by steel wire
Net and permeable gauze prevent rock mass particle from falling into bottom lucite cylinder with infiltration, open air bleeding valve by row simultaneously
Tracheae is exhausted；
3), after During Geotechnical Tests to be measured is uniformly filled in water, noted bottom lucite cylinder by fluorescer delivery device
Enter appropriate fluorescence diluent；
4), after fluorescence diluent is uniformly mixed in bottom lucite cylinder, controls terminal by fluorescence detector and beat
Open fluorescence detection subsystem, now close water inlet pipe top water check valve；Meanwhile, organic in Steel net bottom
Glass infuser part masking foil wraps up, and prevents the interference of ambient；
5) open ultraviolet LED lamp, launch the ultraviolet light of 365nm after energising, will be dissipated by concavees lens
Spot light is converted to directional light, irradiates the fluorescent solutions between convex lens and concavees lens, excites fluorescer to send ripple
The fluorescence of a length of 550nm, it is spot light that source of parallel light is converged by convex lens, is radiated on narrow band pass filter,
Filtering other veiling glare only by the fluorescence of 550nm, fluorescence is radiated in photo resistance, and fluorescence intensity is converted to
Photoelectric current, fluorescence detector is controlled terminal 9 and is amplified faint light electric current by micro-current sensing means, logical
Cross A/D conversion equipment and convert electrical signals to data signal；
6), after fluorescence detection subsystem all parts preheating 2min, open the water check valve on water inlet, beat simultaneously
Opening the water check valve on drain pipe, water oozes under soil sample to be measured is continuous, and lucite cylinder base fluorescent agent is by constantly
Dilution, is read and stores record fluorescer concentration value in real time, carry out data process in terminal by data acquisition unit
The seepage velocity of ground sample to be measured can be measured；
Described step 3) in fluorescer throw in method of operating be, automatically thrown in by fluorescer controller promote glimmering
Photo etching syringe is thrown in fluorescence diluent the most on time and is entered lower cavity according to operational order, is stirred by fluorescer
Mix device to be mixed in by the fluorescence diluent Quick uniform of injection in the percolating fluid of bottom, wherein mixing arm stirring at low speed
2～3min, it is then shut off fluorescer agitator.
Described step 6) the calculating process of seepage velocity is:
It is directly proportional to fluorescer concentration c according to photo-current intensity I, so having:
Further according to single hole point Dilution Model, the relation between fluorescer concentration c and seepage velocity v:
By and the relation that can obtain between percolation flow velocity v and photo-current intensity I be:
Wherein: α is loaded filter correction factor, if loaded filter water penetration be far longer than ground sample to be measured can value
It is 1；R is the radius of plexiglass cylinder；T constantly dilutes the time used for fluorescer in experiment.
Advantages of the present invention with have the beneficial effects that:
1. this fluorescence Rock And Soil seepage detector detection sensitivity is high, and photoelectric cell can catch fluorescence by high discrimination
Concentration change, the fluorescence intensity change caused, its accurate measurement precision can reach 0.0001ug/ml, because of
This can be changed by such small concentrations accurately measures Rock And Soil seepage coefficient, measuring method and conventional seepage flow instrument
Completely different.
2. the fluorescer luyor-6200 used has stable in properties, non-toxic degradable, and easy detection sensitivity is high
Feature.In experiment, fluorescer solution concentration is the lowest, and its volume ratio is 0.1 ‰～0.25 ‰, and fluorescer consumes
Little, cheap.Fluorescer is not limited to one, as long as meeting high water soluble, nontoxic can natural degradation,
Excitation wavelength differs greatly with wavelength of fluorescence, these conditions of stable in properties, can be all that experiment detection is used.
3. instrument volume is little, increasingly automated, easy to operate.
4. ultraviolet LED lamp can send the ultraviolet light of specific 365nm, is turned by divergence point light source by concavees lens
It is changed to directional light, irradiates the fluorescent solutions between convex lens and concavees lens, excite fluorescer to send wavelength to be
The fluorescence of 550nm, it is spot light that source of parallel light is converged by convex lens, is radiated on narrow band pass filter, filters it
Its veiling glare is only by the fluorescence of 550nm, and fluorescence is radiated in photo resistance, and fluorescence intensity is converted to photoelectric current,
Fluorescence detector is controlled terminal 9 and is amplified faint light electric current by micro-current sensing means, passes through A/D
Conversion equipment converts electrical signals to data signal, can convert optical signal into telecommunications by above-mentioned illumination system
Number, and then the fluorescent liquid change in concentration that detection is within lucite cylinder.
5., for the ease of Germicidal efficacy, contain sample lucite cylinder transparent, but in experimentation, use masking foil
Tight parcel cylinder outer wall lower cavity part, after fluorescence detection subsystem starts, can avoid ambient to do
Disturb.
6. can convert optical signal into the signal of telecommunication by photo resistance, and then the change of solution concentration be detected,
Finally realize the mensuration of infiltration coefficient.
7. after seepage stability, in bottom of cylinder, add certain density water base fluorescer, constantly flow through rock
Under the infiltration dilution of the soil body, catch such small concentrations by photoelectric current detecting system and change, dilute mould according to conventional point
Type, can accurately measure Rock And Soil speed of seepage flow, and then obtain the infiltration coefficient of sample.
8. experiment find, luyor-6200 when finite concentration (volume ratio is 0.1 ‰～0.25 ‰), the light detected
Electric current is directly proportional to concentration.By adding certain density fluorescer in device, constantly flowing through Rock And Soil
Under infiltration dilution, catch such small concentrations by photoelectric current detecting system and change, according to conventional point Dilution Model, can
Accurately to measure Rock And Soil speed of seepage flow.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the Rock And Soil sample infiltration coefficient measuring equipment schematic diagram that the present invention provides.
Fig. 2 is the fluorescence detecting system thin portion structural representation that the present invention provides.
Fig. 3 is the infiltration coefficient measurement system anti-filter modular construction schematic diagram that the present invention provides.
Fig. 4 is the fluorescence detecting system principle sketch that the present invention provides.
Fig. 5 is concentration and the photoelectric current relation curve that experiment records water base fluorescer.
In figure: liquid supply box 1, water inlet pipe 2, water check valve 3, temperature control system 4, lucite cylinder 5, gravel layer
6, ground sample 7 to be measured, Steel net 8, fluorescence detector controls terminal 9, data acquisition unit 10, fluorescence
Agent delivery device 11, fluorescence detection subsystem 12, drain pipe 13, liquid holding groove 14, stir power set 15,
Mixing arm speed adjuster 16, mixing arm 17, fluorescer throws in controller 18 automatically, fluorescer syringe 19, glimmering
Light diluent 20, insulate wire casing 21, ultraviolet LED lamp 22, and concavees lens 23 support buttress shaft 24, convex lens
25, narrow band pass filter 26, photo resistance 27, permeable gauze 28, air bleeding valve 29, blast pipe 30.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the present invention are described further.
Embodiment 1:
As Figure 1-4, a kind of Rock And Soil osmotic coefficient investigating device based on water base fluorescer dilution method, it
Including liquid supply box 1, the bottom of liquid supply box 1 connects water inlet pipe 2, and water inlet pipe 2 is provided with water check valve 3,
Organic glass infuser 5 is placed in the underface of water inlet pipe 2, and lucite cylinder 5 is internal fills ground sample 7 to be measured,
The top layer of described ground sample 7 to be measured is provided with gravel layer 6, and bottom is provided with permeable gauze 28 and Steel net 8；
The bottom symmetrical of described lucite cylinder 5 is provided with exhaust apparatus；The bottom of described machine glass infuser 5 is provided with glimmering
Photo etching delivery device 11, fluorescer delivery device 11 is controlled eventually with fluorescence detector by data acquisition unit 10
End 9 is connected；Described fluorescer delivery device 11 is connected with fluorescence detection subsystem 12；Described lucite cylinder
The outside of 5 is provided with temperature control system 4；The bottom of described lucite cylinder 5 is provided with drain pipe 13, drain pipe
The underface of 13 is provided with liquid holding groove 14.
Further, by lucite cylinder 5, ground sample 7 to be measured is held, by liquid supply box 5
Ground sample 7 to be measured can be carried out water injection work, and then make ground sample 7 to be measured to penetrate through
Fluorescer delivery device 11 can inject the measurement that a certain amount of fluorescence diluent 20 is follow-up in penetrating fluid and carry
For test basis.
Further, described exhaust apparatus includes blast pipe 30, and blast pipe 30 is provided with air bleeding valve 29.Logical
Cross air bleeding valve 29 and blast pipe 30 can be exhausted operation.
Further, described fluorescer delivery device 11 includes that fluorescer throws in controller 18 and fluorescer automatically
Agitator；Described fluorescer automatically throw in controller 18 be connected with fluorescer syringe 19 control fluorescence diluent
The injection volume of 20；Described fluorescer agitator includes stirring power set 15, the output of stirring power set 15
Axle is provided with mixing arm speed adjuster 16, and the output shaft of mixing arm controller 16 is provided with mixing arm 17.Pass through
Controller 18 thrown in automatically by fluorescer can inject quantitative fluorescence diluent 20 in penetrating fluid, by stirring
Arm controller 16 can make fluorescer sufficiently mix with penetrating fluid.
Further, described fluorescence detection subsystem 12 includes that ultraviolet LED lamp 22, ultraviolet LED lamp 22 are arranged
Supporting the head of buttress shaft 24, it is internal that the power line of described ultraviolet LED lamp 22 is arranged on insulation wire casing 21,
The afterbody of described support buttress shaft 24 is provided with photo resistance 27, supports buttress shaft 24 inside from its head to afterbody
Interlude be sequentially installed with concavees lens 23, convex lens 25 and narrow band pass filter 26；Described concavees lens 23 He
It is machined with inlet opening on support buttress shaft 24 between convex lens 25, facilitates fluorescent liquid to enter.It is subject to according to fluorescer
The special wavelength light that energy is higher excites, and launches the fluorescence that wavelength ratio excitation wavelength is longer, and fluorescence intensity
Langbobier law is met with fluorescer concentration.According to this principle, the water base fluorescer chosen
Luyor-6200 has stable in properties, non-toxic degradable, the feature that easy detection sensitivity is high, sets up a set of permissible
System according to fluorescer concentration real-time determining Rock And Soil seepage velocity.Experiment finds, luyor-6200 is in concentration
When volume ratio is 0.1 ‰～0.25 ‰, the photoelectric current detected is directly proportional to concentration.By adding one in device
Determine the fluorescer of concentration, under the infiltration constantly flowing through Rock And Soil dilutes, catch micro-by photoelectric current detecting system
Little change in concentration, according to conventional point Dilution Model, can accurately measure Rock And Soil speed of seepage flow.
Further, described temperature control system 4 includes temperature sensor, compressor and heat-transfer pipe, and described temperature passes
Sensor uses Pt100 RTD to be used for detecting temperature；Described compressor and heat-transfer pipe are for temperature control the temperature inside the box
It is adjusted；Described temperature sensor is connected with main control chip, and described main control chip uses single-chip microcomputer STM32；
Described main control chip realizes the communication of slave computer and computer, described Pt100 platinum electricity by RS232 communication protocol
Resistance and XTR105 combination are converted into stable analog signal amount, and described analog signal amount will be turned by AD7705
Becoming digital quantity input main control chip, main control chip just obtains the value of Current Temperatures by calculating；Main control chip warp
Cross pid algorithm, calculate and need to export size of current, write in MAX538 chip, MAX538 chip
Digital quantity is converted into analog input XTR110, thus obtains stable electric current output, control compressor and
Heat-transfer pipe, reaches to regulate experimental temperature purpose.Water percolation flow velocity in soil is relevant with the density of water and viscosity,
And the two numerical value is relevant in temperature.Under condition of different temperatures, the coefficient of dynamic viscosity η of water is different, water close
Degree change is less negligible.Regulate experimental temperature by temperature control subsystem 4, test accuracy can be improved.
Further, described fluorescence diluent 20 use water base fluorescer luyor-6200 have stable in properties,
Non-toxic degradable, the feature that easy detection sensitivity is high.In experiment, fluorescer solution concentration is the lowest, and fluorescer consumes
With little, cheap.Fluorescer is not limited to one, as long as meeting high water soluble, nontoxic can natural degradation,
Excitation wavelength differs greatly with wavelength of fluorescence, these conditions of stable in properties, can be all that experiment detection is used.
Embodiment 2:
See Fig. 4, use item Rock And Soil osmotic coefficient investigating device to carry out Rock And Soil osmotic coefficient investigating method,
It comprises the following steps:
1) water check valve 3 opened bottom liquid supply box 1 on water inlet pipe 2, controls aperture and then the control of water check valve 3
Water velocity processed and discharge, to the internal slowly water supply of lucite cylinder 5, open temperature control system 4 simultaneously and made
Machine glass infuser 5 is under steady temperature environment and tests；
2) water flowed out from water inlet pipe 2 first passes around gravel layer 6, flows through ground sample to be measured and oozes for 7 times, passes through
Steel net 8 and permeable gauze 28 prevent rock mass particle from falling into bottom lucite cylinder 5 with infiltration, open simultaneously
Open air bleeding valve 29 to be exhausted by blast pipe 30；
3) after During Geotechnical Tests 7 to be measured is uniformly filled in water, by fluorescer delivery device 11 to lucite cylinder 5
Appropriate fluorescence diluent 20 is injected in bottom；
4), after fluorescence diluent 20 is uniformly mixed in bottom lucite cylinder 5, controlled eventually by fluorescence detector
End 9 opens fluorescence detection subsystem 12, now closes water inlet pipe 2 top water check valve 3；Meanwhile, filter at steel wire
Lucite cylinder 5 part of net 8 bottom masking foil wraps up, and prevents the interference of ambient；
5) open ultraviolet LED lamp 22, launch the ultraviolet light of 365nm after energising, by concavees lens 23
Divergence point light source is converted to directional light, irradiates the fluorescent solutions between convex lens 25 and concavees lens 23, excite
Fluorescer sends the fluorescence that wavelength is 550nm, and it is spot light that source of parallel light is converged by convex lens 25, is radiated at
On narrow band pass filter 26, filtering other veiling glare only by the fluorescence of 550nm, fluorescence is radiated at photo resistance 27
On, fluorescence intensity is converted to photoelectric current, and fluorescence detector controls terminal 9 by micro-current sensing means to faint
Photoelectric current is amplified, and converts electrical signals to data signal by A/D conversion equipment；
6), after fluorescence detection subsystem 12 all parts preheating 2min, the water check valve 3 on water inlet is opened,
Opening the water check valve 3 on drain pipe 13, water oozes under soil sample to be measured is continuous simultaneously, lucite cylinder 5 end
Portion's fluorescer is constantly diluted, and is read and store record fluorescer concentration value in real time by data acquisition unit, at end
End carries out data and processes the seepage velocity that can measure ground sample to be measured；
Described step 3) in fluorescer throw in method of operating be automatically to be thrown in controller 18 by fluorescer and push away
Dynamic fluorescer syringe 19 is thrown in fluorescence diluent 20 the most on time and is entered lower cavity according to operational order, logical
Cross fluorescer agitator to be mixed in by fluorescence diluent 20 Quick uniform of injection in the percolating fluid of bottom, wherein stir
Mix arm 17 stirring at low speed 2～3min, be then shut off fluorescer agitator.
Embodiment 3:
Such as Fig. 5, experiment records the fluorescer concentration of luyor-6200 with photoelectric current relation curve as it can be seen, ooze
The calculating process of flow velocity is thoroughly:
It is directly proportional to fluorescer concentration c according to photo-current intensity I, so having:
Further according to single hole point Dilution Model, the relation between fluorescer concentration c and seepage velocity v:
Can be obtained the relation between percolation flow velocity v and photo-current intensity I by (1) and (2) is:
Wherein: α is loaded filter correction factor, if loaded filter water penetration be far longer than ground sample to be measured can value
It is 1；R is the radius of plexiglass cylinder；T constantly dilutes the time used for fluorescer in experiment.
Above-described embodiment is used for illustrating the present invention rather than limiting the invention, in the essence of the present invention
In god and scope of the claims, any modifications and changes that the present invention is made, both fall within the present invention's
Protection domain.
Claims (9)
1. a Rock And Soil osmotic coefficient investigating device based on water base fluorescer dilution method, it is characterized in that: it includes liquid supply box (1), the bottom of liquid supply box (1) connects water inlet pipe (2), water check valve (3) is installed on water inlet pipe (2), organic glass infuser (5) is placed in the underface of water inlet pipe (2), lucite cylinder (5) is internal fills ground sample (7) to be measured, the top layer of described ground sample (7) to be measured is provided with gravel layer (6), and bottom is provided with permeable gauze (28) and Steel net (8)；The bottom symmetrical of described lucite cylinder (5) is provided with exhaust apparatus；The bottom of described machine glass infuser (5) is provided with fluorescer delivery device (11), and fluorescer delivery device (11) controls terminal (9) by data acquisition unit (10) with fluorescence detector and is connected；Described fluorescer delivery device (11) is connected with fluorescence detection subsystem (12)；The outside of described lucite cylinder (5) is provided with temperature control system (4)；The bottom of described lucite cylinder (5) is provided with drain pipe (13), and the underface of drain pipe (13) is provided with liquid holding groove (14).
A kind of Rock And Soil osmotic coefficient investigating device based on water base fluorescer dilution method the most according to claim 1, it is characterized in that: described exhaust apparatus includes blast pipe (30), and blast pipe (30) is provided with air bleeding valve (29).
A kind of Rock And Soil osmotic coefficient investigating device based on water base fluorescer dilution method the most according to claim 1, it is characterised in that: described fluorescer delivery device (11) includes that fluorescer throws in controller (18) and fluorescer agitator automatically；Described fluorescer automatically throw in controller (18) be connected with fluorescer syringe (19) control fluorescence diluent (20) injection volume；Described fluorescer agitator includes stirring power set (15), the output shaft of stirring power set (15) is provided with mixing arm speed adjuster (16), and the output shaft of mixing arm controller (16) is provided with mixing arm (17).
A kind of Rock And Soil osmotic coefficient investigating device based on water base fluorescer dilution method the most according to claim 1, it is characterized in that: described fluorescence detection subsystem (12) includes ultraviolet LED lamp (22), ultraviolet LED lamp (22) is arranged on the head supporting buttress shaft (24), it is internal that the power line of described ultraviolet LED lamp (22) is arranged on insulation wire casing (21), the afterbody of described support buttress shaft (24) is provided with photo resistance (27), support buttress shaft (24) inside and be sequentially installed with concavees lens (23) from the interlude of its head to afterbody, convex lens (25) and narrow band pass filter (26)；It is machined with inlet opening on support buttress shaft (24) between described concavees lens (23) and convex lens (25), facilitates fluorescent liquid to enter.
A kind of Rock And Soil osmotic coefficient investigating device based on water base fluorescer dilution method the most according to claim 1, it is characterized in that: described temperature control system (4) includes temperature sensor, compressor and heat-transfer pipe, described temperature sensor uses Pt100 RTD to be used for detecting temperature；Described compressor and heat-transfer pipe are for being adjusted temperature control the temperature inside the box；Described temperature sensor is connected with main control chip, and described main control chip uses single-chip microcomputer STM32；Described main control chip realizes the communication of slave computer and computer by RS232 communication protocol, described Pt100 RTD and XTR105 combination are converted into stable analog signal amount, described analog signal amount will be changed into digital quantity input main control chip by AD7705, and main control chip just obtains the value of Current Temperatures by calculating；Main control chip, through pid algorithm, calculates and needs to export size of current, write in MAX538 chip, digital quantity is converted into analog input XTR110 by MAX538 chip, thus obtain stable electric current output, control compressor and heat-transfer pipe, reach to regulate experimental temperature purpose.
A kind of Rock And Soil osmotic coefficient investigating device based on water base fluorescer dilution method the most according to claim 3, it is characterized in that: described fluorescence diluent (20) uses water base fluorescer luyor-6200 to have stable in properties, non-toxic degradable, the feature that easy detection sensitivity is high.
7. use claim 2-6 any one Rock And Soil osmotic coefficient investigating device to carry out Rock And Soil osmotic coefficient investigating method, it is characterised in that it comprises the following steps:
1) water check valve (3) on liquid supply box (1) bottom water inlet pipe (2) is opened, control the aperture of water check valve (3) and then control water velocity and discharge, slowly supply water to lucite cylinder (5) is internal, open temperature control system (4) simultaneously and make lucite cylinder (5) be under steady temperature environment to test；
2) water flowed out from water inlet pipe (2) first passes around gravel layer (6), flow through and ooze under ground sample (7) to be measured, prevent rock mass particle from falling into lucite cylinder (5) bottom with infiltration by Steel net (8) and permeable gauze (28), open air bleeding valve (29) simultaneously and be exhausted by blast pipe (30)；
3), after During Geotechnical Tests to be measured (7) is uniformly filled in water, appropriate fluorescence diluent (20) is injected by fluorescer delivery device (11) to lucite cylinder (5) bottom；
4) after fluorescence diluent (20) is uniformly mixed in lucite cylinder (5) bottom, control terminal (9) by fluorescence detector and open fluorescence detection subsystem (12), now close water inlet pipe (2) top water check valve (3)；Meanwhile, lucite cylinder (5) the part masking foil in Steel net (8) bottom wraps up, and prevents the interference of ambient；
5) ultraviolet LED lamp (22) is opened, the ultraviolet light of 365nm is launched after energising, by concavees lens (23), divergence point light source is converted to directional light, irradiate the fluorescent solutions between convex lens (25) and concavees lens (23), excite fluorescer to send fluorescence that wavelength is 550nm, source of parallel light is converged as spot light by convex lens (25), it is radiated on narrow band pass filter (26), filter other veiling glare only by the fluorescence of 550nm, fluorescence is radiated in photo resistance (27), fluorescence intensity is converted to photoelectric current, fluorescence detector is controlled terminal 9 and is amplified faint light electric current by micro-current sensing means, data signal is converted electrical signals to by A/D conversion equipment；
6) after fluorescence detection subsystem (12) all parts preheating 2min, open the water check valve (3) on water inlet, open the water check valve (3) on drain pipe (13) simultaneously, water oozes under soil sample to be measured is continuous, lucite cylinder (5) base fluorescent agent is constantly diluted, read and store record fluorescer concentration value by data acquisition unit in real time, carry out data process in terminal and can measure the seepage velocity of ground sample to be measured.
Rock And Soil osmotic coefficient investigating method the most according to claim 7, it is characterized in that: described step 3) in fluorescer throw in method of operating be, automatically thrown in controller (18) by fluorescer promote fluorescer syringe (19) to throw in fluorescence diluent (20) entrance lower cavity according to operational order the most on time, by fluorescer agitator, fluorescence diluent (20) Quick uniform of injection is mixed in the percolating fluid of bottom, wherein mixing arm (17) stirring at low speed 2～3min, is then shut off fluorescer agitator.
Rock And Soil osmotic coefficient investigating method the most according to claim 7, it is characterised in that: described step 6) the calculating process of seepage velocity is:
It is directly proportional to fluorescer concentration c according to photo-current intensity I, so having:
Further according to single hole point Dilution Model, the relation between fluorescer concentration c and seepage velocity v:
Can be obtained the relation between percolation flow velocity v and photo-current intensity I by (1) and (2) is:
Wherein: α is loaded filter correction factor, if it can value be 1 that loaded filter water penetration is far longer than ground sample to be measured；R is the radius of plexiglass cylinder；T constantly dilutes the time used for fluorescer in experiment.
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| CN112432955A (en) * | 2020-11-01 | 2021-03-02 | 湖南圣人防水材料有限公司 | Method for detecting penetration depth of permeable epoxy resin waterproof coating |
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