CN105203443B - Osmotic coefficient investigating device and its test method for pervious asphalt concrete track plate test specimen - Google Patents
Osmotic coefficient investigating device and its test method for pervious asphalt concrete track plate test specimen Download PDFInfo
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- CN105203443B CN105203443B CN201510713841.1A CN201510713841A CN105203443B CN 105203443 B CN105203443 B CN 105203443B CN 201510713841 A CN201510713841 A CN 201510713841A CN 105203443 B CN105203443 B CN 105203443B
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Abstract
The present invention provides a kind of osmotic coefficient investigating devices and its test method for pervious asphalt concrete track plate test specimen.Measurement device includes test device and water supply installation, and test device includes workbench, overflow sink, upper bush, lower sleeve, two flanges, electronic thermometer, graduated cylinders etc.；Upper bush lateral wall is equipped with the gap communicated with inside it, and it is an entirety that it is cementing with sleeve, which to be carved with a circle groove, for two identical flanges；Lower sleeve is penetrated through with overflow sink, and overflow sink is provided with an overflow port and a discharge outlet；Test specimen is placed between two flanges, and rubber gasket is placed between flange and test specimen, and flange is equipped with screw hole, is passed through screw hole by stay bolt and is fixed test specimen with nut；The water supply installation is made of water butt, water pump, power switch etc..The present apparatus is reasonable for structure, easy to operate, not only solves the problems, such as side wall leakage well, also achieves the flexible control of hydraulic gradient, and the result of measurement is rationally reliable.
Description
Technical field
The present invention relates to road engineering material osmotic coefficient investigating technical fields, especially a kind of to be used for pervious asphalt coagulation
The vertical osmotic coefficient investigating device of constant head and its test method of navy barrow rut plate test specimen.
Background technology
Asphalt paving has many advantages, such as draining, antiskid, noise reduction as a kind of environment-friendly type road structure sheaf.Its
Well solved the infiltration problem of pavement runoff rainwater, at the same again can recharge groundwater, adequately storage oozes ability and subtracts
Lack extensive concern of the runoff pollution load-bearing capacity by domestic and international field of road.
Infiltration coefficient is a most effective direct index for reflecting pore media drainability, indoor measurement infiltration coefficient
Instrument be generally divided into two kinds of constant head permeameter and falling head permeameter.The difference of different instruments is only form, measures
Difference in precision and use scope, operation principle are mostly based on Darcy laws.For water permeability asphalt mixture, ooze
Saturating coefficient is usually 1 × 10-2Cm/s or more, it is more reasonable using constant head method.
For pervious asphalt concrete osmotic coefficient investigating, there are no unified test methods both at home and abroad at present, mainly make
With the osmotic coefficient investigating device of designed, designed.The survey found that existing osmotic coefficient investigating device is different both at home and abroad
Have the following problems to degree：One, side wall side leakage problem is not solved well；Two, the control of hydraulic gradient is lacked
Flexibility, practical application be not extensive；Three, apparatus structure is complicated, and practical operation is cumbersome.In addition, the material that laboratory is tested
Material is mostly the molding marshal piece of compacting process, however this test specimen is small, and single test specimen differs greatly, and can influence to measure
The precision of data, and the molding track plate test specimen of rolled-on method is then avoided that problem above, and can preferably simulate practical road surface feelings
Condition, but there is presently no the osmotic coefficient investigating devices for track plate specimen Design.
Invention content
The purpose of the present invention provides one kind and is suitable for primarily directed to deficiency existing for existing osmotic coefficient investigating device
The vertical osmotic coefficient investigating device of constant head and its test method of pervious asphalt concrete track plate test specimen.The apparatus structure is set
Meter is reasonable, good leak tightness, it is easy to operate, it can be achieved that hydraulic gradient flexible control, and good solve side wall leakage problems.
In order to achieve the above object, technical scheme is as follows：
One kind being used for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device, including test device and the dress that supplies water
It sets, the test device includes workbench, overflow sink, upper bush, lower sleeve, first flange, second flange, graduated cylinder, temperature
Degree meter；The overflow sink is set on workbench, and overflow sink is equipped with overflow port and discharge outlet, institute is arranged below overflow port
State graduated cylinder；The setting lower sleeve, the lower sleeve are connected with the overflow sink in overflow sink；Above the lower sleeve
The first and second flange being connected is set, the pervious asphalt concrete track plate test specimen is set between the first and second flange, second
The upper bush is set above flange, and upper bush is equipped with spout hole；The thermometer is arranged in the overflow sink；Upper,
Lower sleeve is tubulose；
The water supply installation includes water butt, water pump, power switch, and water butt is by water supply conduit, water pump on described
Sleeve water filling, power switch control water pump running.
Preferably, first and second flange is being equipped with a circle groove close to edge, and upper and lower sleeve wall is embedded in corresponding
It is in groove and cementing；The lower sleeve sidewall bottom is equipped with the strip-shaped hole of several and the perforation of overflow sink；The upper and lower sleeve
Sectional dimension it is identical, upper and lower sleeve is that the high-quality organic glass of polymetylmethacrylate pours pipe, upper and lower sleeve
Internal diameter controls between 420mm-450mm..
Preferably, the pervious asphalt concrete track plate test specimen is using the molding pervious asphalt concrete vehicle of rolled-on method
Rut plate test specimen, four sides of test specimen and upper and lower marginal surface carry out gap seals, sample dimensions using epoxy coating
For long 300mm × wide 300mm × thickness 50mm.
Preferably, the overflow sink is to pour pipe and polymethyl by polymetylmethacrylate organic glass
Sour methyl esters PMMA organic glass circular bottom plates are cementing to be formed, and cementing place is water-tight.
Preferably, 8 screw holes are equipped between the first and second flange outer edge and groove, adjacent screw hole spacing is identical, the
One, the outer diameter of two flanges is more than the outer diameter of upper and lower sleeve, and the thickness of the first and second flange is more than the thickness of upper and lower sleeve；The first,
Two flange centers are equipped with square trepanning, and stay bolt passes through screw hole and fixes the pervious asphalt concrete track with nut installation
Plate test specimen.
Preferably, first and second flange is respectively placed with pervious asphalt concrete track plate surface of test piece contact position
One slat gum gasket, rubber gasket are bar shaped square, and rubber gasket inward flange and first and second flange center are just
Square opening size is identical.
Preferably, the power switch is automatically controlled equipped with water pump, and water pump is automatically controlled to connect the water pump by conducting wire.
Preferably, 5 overflow ports are provided on the upper bush lateral wall, overflow port is equipped with valve, two neighboring overflow
Distance is identical between mouthful, and 5 overflow ports are laid on same vertical line.
Preferably, the temperature is calculated as electronic thermometer, gap lower edge of the electronic thermometer bottom in overflow sink
Horizontal line is hereinafter, the digital display screen of electronic thermometer is higher than the top edge of overflow sink.
Test method for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device, characterized in that including
Following steps：
(1) the pervious asphalt concrete track plate test specimen that sealing is completed is put into Corelok vacuum densimeters and is vacuumized,
Then test specimen is put into clear water and stands 2h, it is water-saturated state to make it；
(2) after the leak detection of osmotic coefficient investigating device, between test specimen is placed in the first and second flange, and make
It is fixed with screw bolt and nut so that test specimen is fitted closely with sleeve, and water can not be flowed out from side；
(3) injected clear water into water butt, turns on the power switch, and into upper bush 1, slow water filling, flow are led to from top to bottom
Entire test specimen is crossed, after test specimen leaving no air bubbles inside is discharged, an overflow port of overflow sink overflow port and upper bush is opened, closes
Other overflow ports, make test specimen be in os-motic state；
(4) water supply flow size is adjusted so that waterflow stabilization overflows, i.e., head difference Δ h is remained unchanged；
(5) while pressing stopwatch, the initial reading Q of graduated cylinder is recorded1, cross regular hour t, record graduated cylinder at this time
Read Q2, and water temperature T at this time is recorded, then (Q2-Q1) i.e. test specimen within the t times by flow, be denoted as Q.
(6) coefficient of permeability is calculated according to following formula, and calculating is accurate to 1.0 × 10-2Mm/s, and result is scaled water
Infiltration coefficient when temperature is 20 DEG C；
In formula：KTFor water temperature T DEG C when infiltration coefficient, cm/s；
Q is the exudation water in time t second, cm3；
L is the height of pervious asphalt concrete test specimen, cm；Take 5cm
Δ h is head difference, cm；
A is the discharge section area of pervious asphalt concrete test specimen, cm2；
In formula：K20For 20 DEG C of water temperature when infiltration coefficient, cms-1；
ηTThe coefficient of dynamic viscosity of water, kPas when for water temperature being T DEG C；
(7) aforesaid operations are repeated three times, the data being calculated are averaged as last result；
(8) influence of the hydraulic gradient to osmotic coefficient investigating result is probed into, then changes head difference Δ h, i.e., is covered in change
The opening and closing combination of cylinder 3 valve of overflow port, aforesaid operations are repeated to same test specimen.
Compared with prior art, the invention has the advantages that：
1, reasonable for structure, easy to operate, input cost is low.
2, pervious asphalt concrete track plate test specimen surrounding is sealed with epoxy coating, while indirect with sleeve lateral wall
Contact, solves the problems, such as side wall leakage, improves the stability of osmotic coefficient investigating well.
3, the square bore size in flange center has been determined, then permeable cross section effective area is fixed value, eliminates examination
The uncertainty of permeable cross section effective area, improves the precision of measurement when between part and sleeve with sealings such as greasy filth, mortars.
4, it is connected with due to being between sleeve and test specimen, as long as so bolt long enough, then the height and number of test specimen
Amount can also be adjusted according to the needs of research.
5, upper bush be provided with multiple gaps, it can be achieved that hydraulic gradient flexible control.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is test device structural schematic diagram；
Fig. 3 is flange arrangement schematic diagram；
Fig. 4 is that track plate test specimen side surface seals schematic diagram；
Fig. 5 is the relational graph of infiltration coefficient and hydraulic gradient that the osmotic coefficient investigating device measures.
In figure, 1 upper bush, 2 upper bush overflow ports, 3 valves, 4 bolts, 5 electronic thermometers, 6 overflow sinks, 7, which work, puts down
Platform, 8 rubber gaskets, 9 pervious asphalt concrete track plate test specimens, 10 epoxy coatings, 11 flanges, 12 nuts, 13 overflows
Sink overflow port, 14 lower sleeves, 15 overflow water-trough outlets, 16 large capacity graduated cylinders, 17 water supply conduits, 18 water butts, 19 power supplys
Switch, 20 water pumps, 21 grooves, 22 screw holes.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings and by embodiment：
A kind of osmotic coefficient investigating device for pervious asphalt concrete track plate test specimen, including measure pervious asphalt and mix
The test device of solidifying navy barrow rut plate test specimen infiltration coefficient and the water supply installation to supply water to test device.
Test device includes workbench 7, overflow sink 6, upper bush 1, lower sleeve 14, two flanges 11, overflow port, rubbers
Glue gasket 8, electronic thermometer 5, large capacity graduated cylinder 16.The upper and lower part of upper bush 1 be open and be provided on lateral wall in it
The upper bush overflow port 2 that portion communicates, ((flange on top is referred to as second flange to two identical flanges 11, and the flange of lower part is referred to as
It is first flange, similarly hereinafter)) entirety it is cementing with sleeve to be carved with a circle groove 21 close to edge.Lower sleeve 14 it is upper and lower
Portion is open and opens multiple strip-shaped holes close to the side surface of bottom, is penetrated through with overflow sink 6.Overflow sink 6 is provided with one and overflows
Head piece 13 and a discharge outlet 15.7 upper surface of workbench is followed successively by overflow sink 6, lower sleeve 14 and the first method from the bottom to top
Orchid, rubber gasket 8, track plate test specimen 9, rubber gasket 8, second flange and upper bush 1.Track plate test specimen 9 is placed in first,
Between two flanges, flange respectively places a slat gum gasket with the upper and lower surface contact position of test specimen, and flange is equipped with screw hole, passes through
Stay bolt passes through screw hole and installs fixed test specimen with nut 12.
Water supply installation is made of water butt 18, water pump 20, power switch 19 etc., and water supply installation is by water supply conduit 17 to institute
Test device water filling from top to bottom is stated, flow size is controllable, flow speed stability.
Test specimen is using the molding pervious asphalt concrete track plate test specimen of rolled-on method, and size is long 300mm × wide 300mm
× thickness 50mm.Four sides of test specimen and upper and lower marginal surface carry out gap seals using epoxy coating.
Upper bush 1 is cylinder, and 5 overflow ports are provided on outer side wall, and distance is identical between two neighboring overflow port, and
It is laid on same vertical line.
Lower sleeve 14 is identical as the sectional dimension of upper bush 1, and is all the high-quality organic glass of polymetylmethacrylate
Glass pours pipe, and internal diameter controls between 420mm-450mm.
Overflow sink 6 is to pour pipe and polymetylmethacrylate by polymetylmethacrylate organic glass
Organic glass circular bottom plate is cementing to be formed, and cementing place is water-tight, if there are one gap and an exhaust-valve, gap water outlet is logical
It crosses conduit and flows into graduated cylinder.
11 edge of flange is equipped with 8 screw holes, and two neighboring spiral shell distance between borehole is identical, and the outer diameter of flange is more than upper and lower sleeve
Outer diameter, thickness be more than upper and lower sleeve thickness；Flange center is equipped with square trepanning, and trepanning outer rim has a circle cutting, described
Cutting width is identical as the thickness of upper and lower sleeve, and sleeve wall is in cutting and cementing, and cementing place is water-tight.
Rubber gasket 8 two is bar shaped square, inner edge square and the flange central square bore size phase
Together.
5 bottom of electronic thermometer overflow sink gap lower edge horizontal line hereinafter, electronic thermometer digital display screen
Curtain is higher than the top edge of overflow sink.
Power switch 19 is automatically controlled equipped with water pump, and water pump is automatically controlled to connect the water pump by conducting wire, and water butt is via conduit
Water pump is connected, water pump connects the test device via water inlet conduit.
Overflow sink 13 is placed on workbench 7；Lower sleeve 14 is embedded in the groove 21 of first flange, and cementing is
One is whole, places it in the center of overflow sink 13；The square trepanning outer rim of first flange 11 on lower sleeve 14 is solid
Determine rubber gasket 8, the outer rim alignment rubber gasket 8 of pervious asphalt concrete track plate test specimen 9 is placed reliable；Upper bush
1 with second flange, the connection type of rubber gasket 8 with lower sleeve 14, and place it on track plate test specimen 9；With bolt 4
And track plate test specimen 9 is fixed between the first and second flange 11 by nut 12；A great Rong is placed below overflow sink overflow port 13
Measure graduated cylinder 16；Water supply installation is to control water pump 20 by power switch 19 to operate, and passes through water pump 20 by water butt by water supply conduit 17
Water in 18 is passed through in the upper bush 1 of test device, and the flow exported by water supply installation is controllable and direct compared to running water pipe
It supplies water and more stablizes.
The mineral aggregate gradation and bitumen aggregate ratio of mixture are determined according to water-permeating pitch mixed material mixing proportion design method, and are mixed
Material mix is closed, the asphalt mixed is put into die trial, track plate test specimen is molded using rolled-on method, sample dimensions are
300mm × 300mm × 50mm is stored at least demould afterwards for 24 hours at normal temperatures, obtains water-permeating pitch mixed material track plate test specimen 9.
As shown in Fig. 2, the height H=500mm of entire test device, the height H1=300mm of upper bush 1, inner diameter
For D=400mm, on the basis of its lower edge, one overflow port 2 and valve 3 be set every 40mm from the bottom up, overflow port it is interior
Wall diameter D2=10mm；The height H2=150mm of lower sleeve 14, inner diameter are identical as upper bush 1；The height H3 of overflow sink
=240mm, inner diameter D1=500mm are arranged a discharge outlet 15 in its bottom, a band are arranged at the above 150mm in its bottom
The top edge of valvular overflow port 13,13 lower end of overflow port and lower sleeve 14 is in the same horizontal line；As shown in figure 3, flange
The diameter of 11 outer diameter D 3=450mm, groove 21 are identical as the diameter of upper bush 1 and lower sleeve 14, central square trepanning face
Product is L × L=260mm × 260mm, the as discharge section area of test specimen, inward flange and the square trepanning of rubber gasket 8
It overlaps, strip width 20mm, 8 screw holes 22 is equipped between 11 outer edge of flange and groove 21, a diameter of 10mm is adjacent
The spacing of screw hole 22 is identical.The water butt volume of water supply installation is 200L, graduated cylinder volume 50L.As shown in figure 4, using epoxy resin
With curing agent 1:Side surface and upper and lower marginal surface 20mm of the epoxy coating 10 to track plate test specimen 9 made of 1 reconciliation
Width at smear infiltration, stand 2h or more make epoxy resin cure.
The continuous mode of the coefficient of permeability of pervious asphalt concrete track plate test specimen is as follows：
1,9 test specimen of pervious asphalt concrete track plate that sealing is completed is put into Corelok vacuum densimeters and is vacuumized,
Then test specimen is put into clear water and stands 2h, it is water-saturated state to make it；
2, it after the leak detection of osmotic coefficient investigating device, between test specimen is placed in two flanges 11, and uses
Bolt 4 and nut 12 are fixed so that test specimen is fitted closely with sleeve, and water can not be flowed out from side；
3, the injected clear water into water butt 18, turns on the power switch 19, the slow water filling into upper bush 1, flow from upper and
Down by entire test specimen, after test specimen leaving no air bubbles inside is discharged, an overflow of overflow sink overflow port 13 and upper bush is opened
Mouth 2, closes other overflow ports, test specimen is made to be in os-motic state；
4, water supply flow size is adjusted so that waterflow stabilization overflows, i.e., head difference Δ h is remained unchanged.
5, while pressing stopwatch, the initial reading Q of graduated cylinder 16 is recorded1, regular hour t is crossed, graduated cylinder at this time is recorded
16 reading Q2, and water temperature T at this time is recorded, then (Q2-Q1) i.e. test specimen within the t times by flow, be denoted as Q.
6, coefficient of permeability is calculated according to following formula, and calculating is accurate to 1.0 × 10-2Mm/s, and result is scaled water
Infiltration coefficient when temperature is 20 DEG C.
In formula：KTFor water temperature T DEG C when infiltration coefficient, cm/s；
Q is the exudation water in time t second, cm3；
L is the height of pervious asphalt concrete test specimen, cm；Take 5cm
Δ h is head difference, cm；
A is the discharge section area of pervious asphalt concrete test specimen, cm2.Take 260mm × 260mm
In formula：K20For 20 DEG C of water temperature when infiltration coefficient, cms-1；
ηTThe coefficient of dynamic viscosity of water, kPas when for water temperature being T DEG C；
7, aforesaid operations are repeated three times, the data being calculated are averaged as last result.
8, influence of the hydraulic gradient to osmotic coefficient investigating result is probed into, then changes head difference Δ h, that is, changes upper bush
The opening and closing of 3 valve of overflow port is combined, and aforesaid operations are repeated to same test specimen.
Fig. 5 be the pervious asphalt concrete track plate test specimen measured using the osmotic coefficient investigating device infiltration coefficient with
The relational graph of hydraulic gradient, it is seen that the result measured by the osmotic coefficient investigating device is rationally reliable.
Claims (7)
1. one kind being used for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device, including test device and the dress that supplies water
It sets, which is characterized in that the test device includes workbench (7), overflow sink (6), upper bush (1), lower sleeve (14),
One flange, second flange, graduated cylinder (16), thermometer (5)；The overflow sink (6), overflow sink are set on workbench (7)
(6) it is equipped with overflow port (13) and discharge outlet (15), the graduated cylinder (16) is set below overflow port (13)；In overflow sink (6)
The lower sleeve (14) is set, and the lower sleeve (14) is connected with the overflow sink (6)；It is set above the lower sleeve (14)
The first and second flange being connected is set, the first and second flange center is equipped with square trepanning, is arranged between the first and second flange described
Bituminous grout concrete track plate test specimen (9), is arranged the upper bush (1) above second flange, on upper bush (1) lateral wall
5 overflow ports are provided with, overflow port is equipped with valve (3), and distance is identical between two neighboring overflow port, and 5 overflow ports are laid in
On same vertical line；The thermometer (5) is arranged in the overflow sink (6)；Upper and lower sleeve (1,14) is tubulose；
The water supply installation includes water butt (18), water pump (20), power switch (19), and water butt (18) passes through water supply conduit
(17), water pump (20) controls water pump (20) and operates to the upper bush (1) water filling, power switch (19).
2. according to claim 1 be used for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device, feature
It is that first and second flange is being equipped with a circle groove (21) close to edge, and upper and lower sleeve (1,14) barrel is embedded in corresponding
It is in groove (21) and cementing；Lower sleeve (14) sidewall bottom is equipped with the strip-shaped hole of several and the perforation of overflow sink；It is described
The sectional dimension of upper and lower sleeve (1,14) is identical, and upper and lower sleeve (1,14) is that the high-quality organic glasses of PMMA pour pipe, above and below
Sleeve (1,14) internal diameter controls between 420mm-450mm.
3. according to claim 1 be used for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device, feature
Be, the pervious asphalt concrete track plate test specimen (9) be using the molding pervious asphalt concrete track plate test specimen of rolled-on method,
Four sides of test specimen and upper and lower marginal surface carry out gap seals using epoxy coating, and sample dimensions are long 300mm
× wide 300mm × thickness 50mm.
4. according to claim 1 be used for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device, feature
It is that the overflow sink (6) is to pour pipe by PMMA organic glasses and PMMA organic glass circular bottom plates are cementing forms, cementing place
It is water-tight；The thermometer (5) is electronic thermometer, gap lower edge horizontal line of the electronic thermometer bottom in overflow sink
Hereinafter, the digital display screen of electronic thermometer is higher than the top edge of overflow sink.
5. according to claim 2 be used for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device, feature
It is that 8 screw holes (22) are equipped between the first and second flange outer edge and groove (21), adjacent screw hole spacing is identical, first,
The outer diameter of two flanges is more than the outer diameter of upper and lower sleeve (1,14), and the thickness of the first and second flange is more than upper and lower sleeve (1,14)
Thickness；Stay bolt passes through screw hole and fixes the pervious asphalt concrete track plate test specimen (9) with nut installation；First and second method
It is blue respectively to place a slat gum gasket (8), rubber seal with pervious asphalt concrete track plate test specimen (9) the surface contact position
Pad is square, and rubber gasket inward flange is identical as the first and second flange central square bore size.
6. according to claim 1 be used for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device, feature
It is that the power switch (19) is automatically controlled equipped with water pump, and water pump is automatically controlled to connect the water pump (20) by conducting wire.
7. being used for pervious asphalt concrete track plate test specimen osmotic coefficient investigating device as described in any one of claim 1-6
Test method, characterized in that include the following steps：
(1) pervious asphalt concrete track plate (9) test specimen that sealing is completed is put into Corelok vacuum densimeters and is vacuumized,
Then test specimen is put into clear water and stands 2h, it is water-saturated state to make it；
(2) after the leak detection of osmotic coefficient investigating device, between test specimen is placed in the first and second flange, and spiral shell is used
Bolt (4) and nut (12) are fixed so that test specimen is fitted closely with sleeve, and water can not be flowed out from side；
(3) to water butt (18) interior injected clear water, (19) are turned on the power switch, the slow water filling into upper bush (1), flow is from upper
And it is lower by entire test specimen, after test specimen leaving no air bubbles inside be discharged, one of opening overflow sink overflow port (13) and upper bush
Overflow port (2), closes other overflow ports, test specimen is made to be in os-motic state；
(4) water supply flow size is adjusted so that waterflow stabilization overflows, i.e., head difference Δ h is remained unchanged；
(5) while pressing stopwatch, the initial reading Q of record graduated cylinder (16)1, regular hour t is crossed, graduated cylinder at this time is recorded
(16) reading Q2, and water temperature T at this time is recorded, then (Q2-Q1) i.e. within the t times by the water flow of test specimen, be denoted as Q；
(6) coefficient of permeability is calculated according to following formula, and calculating is accurate to 1.0 × 10-2Mm/s, and result is scaled water temperature and is
Infiltration coefficient at 20 DEG C；
In formula：KTFor water temperature T DEG C when infiltration coefficient, cm/s；
Q is to pass through the water flow of test specimen, cm within the t times3；
L is the height of pervious asphalt concrete test specimen, cm；
Δ h is head difference, cm；
A is the discharge section area of pervious asphalt concrete test specimen, cm2；
In formula：K20For 20 DEG C of water temperature when infiltration coefficient, cms-1；
ηTThe coefficient of dynamic viscosity of water, kPas when for water temperature being T DEG C；
(7) aforesaid operations are repeated three times, the data being calculated are averaged as last result；
(8) influence of the hydraulic gradient to osmotic coefficient investigating result is probed into, then changes head difference Δ h, that is, changes upper bush and overflows
The opening and closing of head piece (3) valve is combined, and aforesaid operations are repeated to same test specimen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510713841.1A CN105203443B (en) | 2015-10-28 | 2015-10-28 | Osmotic coefficient investigating device and its test method for pervious asphalt concrete track plate test specimen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510713841.1A CN105203443B (en) | 2015-10-28 | 2015-10-28 | Osmotic coefficient investigating device and its test method for pervious asphalt concrete track plate test specimen |
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| CN105203443B true CN105203443B (en) | 2018-10-12 |
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| CN110186829A (en) * | 2019-05-31 | 2019-08-30 | 贵州大学 | A kind of physical simulation experiment device of seepage deformation monitoring and permeability parameters solution |
| CN110487699B (en) * | 2019-08-23 | 2022-03-22 | 淮阴工学院 | Testing device and testing method for permeability coefficient of pervious concrete |
| CN111337403B (en) * | 2020-01-06 | 2021-07-02 | 四川大学 | Experimental device for measuring slope water permeability and water-stone/sand separation characteristics of water permeable material |
| CN112394021B (en) * | 2021-01-20 | 2021-04-09 | 西南交通大学 | Indoor testing arrangement of permeable pavement structure osmotic coefficient |
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| CN2727731Y (en) * | 2004-03-31 | 2005-09-21 | 田波 | Multifunctional road material infiltration gauge |
| CN2718706Y (en) * | 2004-06-22 | 2005-08-17 | 浙江大学 | Self-circulating darcy law experimental instrument |
| CN100595562C (en) * | 2008-05-14 | 2010-03-24 | 浙江大学 | Integral permeability testing machine for self circulation measuring for perpendicular and horizontal permeability coefficient |
| CN201926607U (en) * | 2010-12-31 | 2011-08-10 | 中国水电顾问集团中南勘测设计研究院 | Seepage deformation tester |
| CN205120540U (en) * | 2015-10-28 | 2016-03-30 | 扬州大学 | A infiltration coefficient measurement device for permeating water asphalt concrete rut board test piece |
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