CN107941676B - A kind of pollution preparation of soil sample and testing permeability is detecting device integrated and method - Google Patents
A kind of pollution preparation of soil sample and testing permeability is detecting device integrated and method Download PDFInfo
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- CN107941676B CN107941676B CN201711315329.7A CN201711315329A CN107941676B CN 107941676 B CN107941676 B CN 107941676B CN 201711315329 A CN201711315329 A CN 201711315329A CN 107941676 B CN107941676 B CN 107941676B
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- 239000002689 soil Substances 0.000 title claims abstract description 87
- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 230000035699 permeability Effects 0.000 title claims description 24
- 238000002360 preparation method Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000013480 data collection Methods 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 230000008595 infiltration Effects 0.000 claims abstract description 9
- 238000001764 infiltration Methods 0.000 claims abstract description 9
- 230000003204 osmotic effect Effects 0.000 claims abstract description 5
- 230000007797 corrosion Effects 0.000 claims description 69
- 238000005260 corrosion Methods 0.000 claims description 69
- 239000004677 Nylon Substances 0.000 claims description 29
- 229920001778 nylon Polymers 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 7
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 230000037361 pathway Effects 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 238000013481 data capture Methods 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 238000009738 saturating Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000012466 permeate Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing 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
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Fluid Mechanics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of pollution soil sample being used to prepare different pollution levels under the conditions of seepage flow, is suitable for geotechnical engineering, engineering geology, field of environment engineering technology.Including hydraulic loading system I, sample bearing system II, constant pressure water supply system III, IV 4 part of data collection system.Wherein hydraulic loading system I is connected by pipeline road with sample bearing system II, and sample bearing system II is connected by hydraulic pipeline with constant pressure water supply system III, and constant pressure water supply system III is connected by route with data collection system IV.Its pollution soil sample that cannot be only used for preparing different pollution levels under the conditions of seepage flow, it can also complete the test of infiltration coefficient in Polluted Soil forming process under Structure Under Axial Compression, and has while generating the ability of the pollution soil sample of multiple different pollution level, its test that a variety of highly polluted soil body osmotic coefficients may be implemented as needed, its structure is simple, and detection efficiency is high.
Description
Technical field
The present invention designs a kind of detection device and method, especially a kind of geotechnical engineering, engineering geology, environment project
The pollution preparation of soil sample that field uses and testing permeability is detecting device integrated and method.
Background technique
The permeability of Polluted Soil is a hot spot of study of engineering geology.When the soil body is contaminated, permeability can be sent out
Raw corresponding variation.Its infiltrative changing rule after the soil body is contaminated is understood, for the theory of special soil mass property evaluation
Research and engineering practice are all of great significance.Laboratory is often to soil sample used by Polluted Soil testing permeability at present
In advance by the Polluted Soil that is prepared of modes such as impregnating, or is cut and moved into addition to soil sample is formed after seepage flow
Permeability apparatus carry out testing permeability, this preparation method and test method be difficult to objectively respond the forming process of Polluted Soil,
And be difficult to ensure the original state characteristic of Polluted Soil, it is even more impossible to be embodied under Structure Under Axial Compression flow event of the contaminated-fluid in the soil body and
The forming process and pollution level of Polluted Soil, it is even more impossible to test the permeability in Polluted Soil forming process simultaneously.
Summary of the invention
Shortcoming in view of the above technology, provides that a kind of structure is simple, and easy to use, detection effect is good, can prepare
Pollution soil sample under the conditions of seepage flow, at the same test the lower pollution soil sample of xial feed effect infiltration coefficient the pollution preparation of soil sample with
Testing permeability is detecting device integrated and method.
To realize the above-mentioned technical purpose, the pollution preparation of soil sample of the invention and testing permeability are detecting device integrated, and 1.
A kind of pollution preparation of soil sample and testing permeability are detecting device integrated, it is characterised in that: it includes hydraulic loading system I, examination
Sample bearing system II, constant pressure water supply system III, IV 4 part of data collection system；Wherein hydraulic loading system I passes through petroleum pipeline
Road is connected with sample bearing system II, and sample bearing system II is connected by hydraulic pipeline with constant pressure water supply system III, permanent
Pressure water system III is connected by route with data collection system IV；
The hydraulic loading system I include hydraulic oil container, hydraulic pump, reversal valve, accumulator, axis pressure table, collection separator and
Hydraulic cylinder, the hydraulic pump are arranged on hydraulic oil container the two and are connected by pipeline road a, and the output end of hydraulic pump passes through defeated
Oil pipe line b is connected with the input terminal of reversal valve, reversal valve, reversal valve through pipeline road c and pipeline road d respectively with accumulator
Sum aggregate separator is connected, and collects and is equipped with axis pressure table on separator, and the output end for collecting separator passes through pipeline road e and accumulator
It is connected, the output end for collecting separator is connected with multiple hydraulic cylinders respectively by a plurality of pipeline road f, wherein hydraulic cylinder
Column under Axial Load is equipped with below inner piston；
The sample bearing system II includes the consistent corrosion-resistant pressure of hydraulic cylinder quantity in quantity and hydraulic loading system I
Power room, corrosion-resistant pressure chamber top are equipped with the pressure-bearing top cover being connected with Column under Axial Load, and corrosion-resistant pressure chamber bottom is equipped with water proof bottom
Plate, between corrosion-resistant pressure chamber and water proof bottom plate be equipped with nylon bed course, nylon bed course be equipped with mesoporous a, water proof bottom plate be equipped with
The matched mesoporous b of mesoporous a, corrosion-resistant pressure chamber bottom are connected by mesoporous a and mesoporous b with hydraulic pipeline a；
The constant pressure water supply system III includes water tank, high-pressure hydraulic pump, expansion drum, adjustable compression release valve, water pressure gauge, safety valve
A, safety valve b, placement pipe, hydraulic pipeline a, hydraulic pipeline b, hydraulic pipeline c, hydraulic pipeline d, shunt valve and condensate correcting-distribuing device,
In more hydraulic pipeline a the input terminal of condensate correcting-distribuing device is connected to by shunt valve, condensate correcting-distribuing device passes through multiply pipeline water set
Hydraulic pipeline b is connected with placement pipe, and the placement pipe both ends are respectively equipped with safety valve a and safety valve b, close to safety valve b mono-
Side is equipped with adjustable compression release valve and water pressure gauge, is equipped with expansion drum among placement pipe, and hydraulic pipeline b is connected with safety valve b, safety
Valve a is connected by hydraulic pipeline c with high-pressure hydraulic pump, and high-pressure hydraulic pump is connected by hydraulic pipeline d with water feeding tank；
The data collection system IV include sensor, data line a, data line b, data line c, multiple pressure transmitters,
Data collecting card, computer, wherein pressure transmitter quantity matches with corrosion-resistant pressure chamber's quantity, the input of pressure transmitter
End is connected separately with the sensor being arranged in corrosion-resistant pressure chamber by more data line a, and the output end of pressure transmitter is logical
It crosses data line b to be connected with data collecting card respectively, data collecting card is connected by computer more than data line c.
Corrosion resistant metal is fixed with by pressure-bearing top cover at the top of corrosion-resistant pressure chamber in the sample bearing system II to burn
Netting, corrosion resistant metal sintered meshwork be arranged between pressure-bearing top cover and corrosion-resistant pressure chamber, corrosion-resistant pressure chamber bottom by every
Water-bed plate is fixed with nylon bed course, and nylon bed course is arranged between water proof bottom plate and corrosion-resistant pressure chamber, wherein in nylon bed course
The heart is equipped with mesoporous a, and water proof bottom plate is equipped with the mesoporous b to match on the position mesoporous a, sets respectively on nylon bed course lower section and side wall
There is seal groove b, the seal groove c for constituting concentric loop state is respectively equipped with above water proof bottom plate.
Mounting groove is equipped on the outside of the seal groove c of water proof bottom plate, water proof bottom plate is connected by mounting groove with corrosion-resistant pressure chamber
It connects.
Told water pressure sensor is arranged in corrosion-resistant pressure chamber, be transversely provided on the side wall of pressure-bearing top cover water outlet with
Sensor buries mouth, and the data line a of water pressure sensor buries mouth from pressure-bearing top cover sensor by the through-hole in pressure-bearing top cover
Extend and is connected with data collecting card.
O-shaped seal groove a is equipped with below the lower section of the corrosion resistant metal sintered meshwork.
A kind of pollution preparation of soil sample and the detecting device integrated detection method of testing permeability, its step are as follows:
It is packed into O-ring seal a on nylon bed course seal groove b and on pressure-bearing top seal slot a, soil sample to be measured is layered and is pressed
Enter corrosion-resistant pressure chamber, root detects soil sample height, the nylon bed course of different height is packed into corrosion-resistant pressure chamber bottom, so that inspection
It surveys soil sample and is full of corrosion-resistant pressure chamber；
Corrosion resistant metal sintered meshwork is placed at the top of detection soil sample, corrosion-resistant pressure chamber is installed on water proof bottom plate mounting groove
On, it docks nylon bed course mesoporous a with water proof bottom plate mesoporous b, hydraulic pipeline a is inserted into mesoporous a and mesoporous b, passes through pressure-bearing
Top cover sensor buries mouth and water pressure sensor is embedded at the top of detection soil sample, covers pressure-bearing top cover；
Start hydraulic pump, forward direction stirs reversal valve, and Column under Axial Load declines under hydraulic action and presses to pressure-bearing top cover, to axis
When the detection reading of pressure table reaches test setting value, reversal valve is reversed, maintains pressure using accumulator；
Open the safety-valve a, starts high-pressure hydraulic pump for the contaminated-fluid in water feeding tank and transports to expansion drum；
High-pressure hydraulic pump and safety valve a are closed when the detection reading in water pressure gauge reaches test requirements document, opens simultaneously safety
Valve b and shunt valve make contaminated-fluid enter detection soil sample bottom through water-stop sheet bottom mesoporous b；
Pressure reducing valve is adjusted, and maintains hydraulic pressure P to change using water pressure gauge present position as benchmark face using formula I using expansion drum
Calculation can obtain sample bottom piezometric head H1, contaminated-fluid Liquid penetrant testing soil sample from bottom to top under osmotic pressure effect, thus mould
The pollution course of quasi- detection soil sample；Piezometric head H at the top of soil sample is read by computer2, and measure pressure-bearing top cover water outlet
The infiltration coefficient of corresponding pollution soil sample is calculated using formula II by the water yield q of unit time.
P=ρ gH I
In formula: ρ-fluid density, unit kg/m3；G-acceleration of gravity, unit 9.8m/s2；H-head, unit
For m；
In formula: q-water outlet unit time water yield/seepage discharge, unit m3/s；L-specimen height/permeation pathway,
Unit is m；A-sample floor space/cross-section of river, unit m2；H1- sample bottom piezometric head, unit m；H2- examination
Piezometric head at the top of sample, unit m；
It is described that different detection soil samples is dispensed using multiple corrosion-resistant pressure chambers, multiple different pollution level can be obtained
Pollution soil sample.
The utility model has the advantages that
A kind of pollution preparation of soil sample test method integrated with testing permeability and device that the present invention is told, can basis
It needs to prepare the pollution soil sample under the conditions of seepage flow, and tests under xial feed effect, pollutes soil sample in pollution soil sample forming process
Infiltration coefficient；And the test of a variety of highly polluted soil body osmotic coefficients may be implemented as needed, structure is simple, detection effect
Rate is high.
Detailed description of the invention
Fig. 1 is pollution preparation of soil sample experimental rig structural schematic diagram integrated with testing permeability of the invention.
Fig. 2 is pressure-bearing top cover and data collection system structural schematic diagram of the invention.
Fig. 3 is nylon cushion schematic diagram of a layer structure of the invention.
Fig. 4 is water proof structural diagram of base plate of the invention.
In figure: I-hydraulic loading system, II-sample bearing system, III-constant pressure water supply system, IV-data collection system,
1- hydraulic oil container, 2- hydraulic pump, 3- pipeline road a, 4- pipeline road b, 5- reversal valve, 6- pipeline road c, 7- accumulator, 8-
Pipeline road d, 9- pipeline road e, 10- axis presses table, 11- collection separator, 12- pipeline road f, 13- hydraulic cylinder, 14- axis pressure
Column, 15- pressure-bearing top cover, 151- water outlet, 152- sensor bury mouth, and 153-O type seal groove a, 182- seal groove b, 192- is close
Sealing groove c, 16- corrosion resistant metal sintered meshwork, the corrosion-resistant pressure chamber 17-, 18- nylon bed course, 181- mesoporous a, 191- mesoporous b, 19-
Water proof bottom plate, 193- mounting groove, 20- hydraulic pipeline a, 21- shunt valve, 22- condensate correcting-distribuing device, 23- hydraulic pipeline b, 24- placement
Pipe, 25a- safety valve a, 25b- safety valve b, 26- adjustable compression release valve, 27- water pressure gauge, 28- expansion drum, 29- hydraulic pipeline c,
30- high-pressure hydraulic pump, 31- hydraulic pipeline d, 32- water feeding tank, 33- sensor, 34- data line a, 35- pressure transmitter, 36- data
Line b, 37- data collecting card, 38- data line c, 39- computer.
Specific embodiment
One embodiment is described in detail with reference to the accompanying drawing.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of pollution preparation of soil sample of the invention detection integrated with testing permeability
Device, including hydraulic loading system I, sample bearing system II, constant pressure water supply system III, IV 4 part of data collection system；Its
Middle hydraulic loading system I is connected by pipeline road with sample bearing system II, and sample bearing system II passes through hydraulic pipeline
It is connected with constant pressure water supply system III, constant pressure water supply system III is connected by route with data collection system IV；
The hydraulic loading system I includes hydraulic oil container 1, hydraulic pump 2, reversal valve 5, accumulator 7, axis pressure table 10, collection point
Oily device 11 and hydraulic cylinder 13, the hydraulic pump 2 are arranged on hydraulic oil container 1 the two and are connected by pipeline road a3, hydraulic pump 2
Output end be connected by pipeline road b4 with the input terminal of reversal valve 5, reversal valve 5, reversal valve 5 is through pipeline road c6 and defeated
Oil pipe line d8 is connected with 7 sum aggregate separator 11 of accumulator respectively, collects and is equipped with axis pressure table 10 on separator 11, collects separator 11
Output end be connected with accumulator 7 by pipeline road e9, the output end for collecting separator 11 passes through a plurality of pipeline road f12 and divides
It is not connected with multiple hydraulic cylinders 13, Column under Axial Load 14 is wherein equipped with below 13 inner piston of hydraulic cylinder；
The sample bearing system II includes that quantity and 13 quantity of hydraulic cylinder in hydraulic loading system I are consistent corrosion-resistant
Pressure chamber 17 is equipped with the pressure-bearing top cover 15 being connected with Column under Axial Load 14, corrosion-resistant 17 bottom of pressure chamber at the top of corrosion-resistant pressure chamber 17
Portion is equipped with water proof bottom plate 19, and nylon bed course 18 is equipped between corrosion-resistant pressure chamber 17 and water proof bottom plate 19, is set on nylon bed course 18
There is mesoporous a181, water proof bottom plate 19 is equipped with and the matched mesoporous b191 of mesoporous a181, the outside seal groove c192 of water proof bottom plate 19
Equipped with mounting groove 193, water proof bottom plate 19 is connected by mounting groove 193 with corrosion-resistant pressure chamber 17；Corrosion-resistant 17 bottom of pressure chamber
Portion is connected by mesoporous a181 and mesoporous b191 with hydraulic pipeline a20；Corrosion-resistant pressure in the sample bearing system II
Corrosion resistant metal sintered meshwork 16 is fixed with by pressure-bearing top cover 15 at the top of room 17, corrosion resistant metal sintered meshwork 16 is arranged on pressure-bearing top
Between lid 15 and corrosion-resistant pressure chamber 17, the lower section of the corrosion resistant metal sintered meshwork 16 is equipped with O-shaped seal groove a153, resistance to
Corrosion 17 bottom of pressure chamber is fixed with nylon bed course 18 by water proof bottom plate 19, the setting of nylon bed course 18 water proof bottom plate 19 with it is resistance to
Corrode between pressure chamber 17, wherein 18 center of nylon bed course is equipped with mesoporous a181, and water proof bottom plate 19 is set on the position mesoporous a181
There is the mesoporous b191 to match, is respectively equipped with seal groove b182, the top of water proof bottom plate 19 on 18 lower section of nylon bed course and side wall
It is respectively equipped with the seal groove c192 for constituting concentric loop state；Told water pressure sensor 33 is arranged in corrosion-resistant pressure chamber 17
In, it is transversely provided with water outlet 151 on the side wall of pressure-bearing top cover 15 and sensor buries mouth 152, the data of water pressure sensor 33
Line a34 buries mouth 152 from 15 sensor of pressure-bearing top cover by the through-hole in pressure-bearing top cover 15 and extends and data collecting card 37
It is connected；
The constant pressure water supply system III includes water tank 32, high-pressure hydraulic pump 30, expansion drum 28, adjustable compression release valve 26, hydraulic pressure
Table 27, safety valve a25a, safety valve b25b, placement pipe 24, hydraulic pipeline a20, hydraulic pipeline b23, hydraulic pipeline c29, water delivery
Pipeline d31, shunt valve 21 and condensate correcting-distribuing device 22, wherein more hydraulic pipeline a20 are connected to condensate correcting-distribuing device 22 by shunt valve 21
Input terminal, multiply pipeline water set is connected by hydraulic pipeline b23 with placement pipe 24 by condensate correcting-distribuing device 22, and the placement is managed
24 both ends are respectively equipped with safety valve a25a and safety valve b25b, are equipped with adjustable compression release valve 26 and water close to the side safety valve b25b
Table 27 is pressed, disposes and is equipped with expansion drum 28 among pipe 24, hydraulic pipeline b23 is connected with safety valve b25b, and safety valve a25a passes through
Hydraulic pipeline c29 is connected with high-pressure hydraulic pump, and high-pressure hydraulic pump 30 is connected by hydraulic pipeline d31 with water feeding tank 32；
The data collection system IV include sensor 33, data line a34, multiple pressure transmitters 35, data line b36,
Data collecting card 37, data line c38, computer 39, wherein 35 quantity of pressure transmitter and corrosion-resistant 17 quantity phase of pressure chamber
Match, the input terminal of pressure transmitter 35 is connected separately with the biography being arranged in corrosion-resistant pressure chamber 17 by more data line a34
The output end of sensor 33, pressure transmitter 35 is connected with data collecting card 37 respectively by data line b36, data collecting card 37
It is connected by data line c38 with computer 39.
A kind of pollution preparation of soil sample and the detecting device integrated detection method of testing permeability, its step are as follows:
It is packed into O-ring seal on nylon bed course seal groove b182 and on pressure-bearing top seal slot a153, by soil sample to be measured
Layering is pressed into corrosion-resistant pressure chamber 17, dispenses different detection soil samples using multiple corrosion-resistant pressure chambers 17, can obtain multiple
The pollution soil sample of different pollution levels；Root detects soil sample height, is packed into the Buddhist nun of different height in corrosion-resistant 17 bottom of pressure chamber
Imperial bed course 18, so that detection soil sample is full of corrosion-resistant pressure chamber 17；
Corrosion resistant metal sintered meshwork 16 is placed at the top of detection soil sample, corrosion-resistant pressure chamber 17 is installed on water proof bottom plate peace
It on tankage 193, docks nylon bed course mesoporous a181 with water proof bottom plate mesoporous b191, hydraulic pipeline a20 is inserted into mesoporous
A181 and mesoporous b191 buries mouth 152 by pressure-bearing top cover sensor and water pressure sensor 33 is embedded at the top of detection soil sample,
Cover pressure-bearing top cover 15；
Start hydraulic pump 2, forward direction stirs reversal valve 5, and Column under Axial Load 14 declines under hydraulic action and applies to pressure-bearing top cover 15
Pressure reverses reversal valve 5 when the detection of axis pressure table 10 reading reaches test setting value, maintains pressure using accumulator 7；
Open the safety-valve a25a, starts high-pressure hydraulic pump 30 for the contaminated-fluid in water feeding tank 32 and transports to expansion drum 28；
High-pressure hydraulic pump 30 and safety valve a25a are closed when the detection reading in water pressure gauge 27 reaches test requirements document, is beaten simultaneously
Safety valve b25b and shunt valve 21 are opened, contaminated-fluid is made to enter detection soil sample bottom through water-stop sheet bottom mesoporous b191；
Pressure reducing valve 26 is adjusted, and maintains hydraulic pressure P using expansion drum 28, using 27 present position of water pressure gauge as benchmark face, is utilized
The conversion of formula I can must detect soil sample bottom piezometric head H1, contaminated-fluid Liquid penetrant testing from bottom to top under osmotic pressure effect
Soil sample, thus the pollution course of analog detection soil sample；Piezometric head H at the top of detection soil sample is read by computer 392, and survey
The infiltration system of corresponding pollution soil sample is calculated using formula II by the water yield q for measuring 151 unit time of pressure-bearing top cover water outlet
Number.
P=ρ gH I
In formula: ρ-fluid density, unit kg/m3；G-acceleration of gravity, unit 9.8m/s2；H-head, unit
For m；
In formula: q-water outlet unit time water yield/seepage discharge, unit m3/s；L-specimen height/permeation pathway,
Unit is m；A-sample floor space/cross-section of river, unit m2；H1- sample bottom piezometric head, unit m；H2- examination
Piezometric head at the top of sample, unit m.
Pollute preparation of soil sample experimental rig working principle integrated with testing permeability:
Detection soil sample is fitted into corrosion-resistant pressure chamber 17, and 5 corrosion-resistant pressure are highly arranged by adjusting nylon bed course 18
The dress soil height of room 17.Axial compressive force is provided by pressure-bearing top cover 15 by hydraulic loading system I.By constant pressure water supply system II through every
Water-bed 191 contaminated-fluid of plate mesoporous is to soil sample bottom.Contaminated-fluid permeates from lower to upper, and through pressure-bearing top cover water outlet 151 at
Outflow, since the dress soil height of 5 corrosion-resistant pressure chambers 17 is different, contaminated-fluid infiltration can form 5 kinds of different pollution levels
Permeate soil sample.Water pressure at the top of soil sample is transmitted to computer by the water pressure sensor for being installed on herein and reads.Measure pressure-bearing
Lower 5 kinds of same axis pressure, identical hydraulic pressure different pollution level soil samples can be obtained in the water yield of 151 unit time of top cover water outlet
Infiltration coefficient.
Claims (7)
1. a kind of pollution preparation of soil sample and testing permeability are detecting device integrated, it is characterised in that: it includes hydraulic loaded system
Unite I, sample bearing system II, constant pressure water supply system III, IV 4 part of data collection system；Wherein hydraulic loading system I passes through
Pipeline road is connected with sample bearing system II, and sample bearing system II is connected by hydraulic pipeline with constant pressure water supply system III
It connects, constant pressure water supply system III is connected by route with data collection system IV；
The hydraulic loading system I includes hydraulic oil container (1), hydraulic pump (2), reversal valve (5), accumulator (7), axis pressure table
(10), collect separator (11) and hydraulic cylinder (13), the hydraulic pump (2) is arranged on hydraulic oil container (1), and the two passes through oil transportation
Pipeline a (3) is connected, and the output end of hydraulic pump (2) is connected by pipeline road b (4) with the input terminal of reversal valve (5), commutation
Valve (5) is connected with accumulator (7) sum aggregate separator (11) respectively through pipeline road c (6) and pipeline road d (8), collects separator
(11) axis pressure table (10) is installed on, the output end of collection separator (11) is connected by pipeline road e (9) with accumulator (7),
The output end of collection separator (11) is connected with multiple hydraulic cylinders (13) respectively by a plurality of pipeline road f (12), wherein liquid
Column under Axial Load (14) are equipped with below compressing cylinder (13) inner piston；
The sample bearing system II includes the consistent corrosion-resistant pressure of hydraulic cylinder (13) quantity in quantity and hydraulic loading system I
Power room (17), corrosion-resistant pressure chamber (17) top are equipped with the pressure-bearing top cover (15) being connected with Column under Axial Load (14), corrosion-resistant pressure
Room (17) bottom is equipped with water proof bottom plate (19), and nylon bed course is equipped between corrosion-resistant pressure chamber (17) and water proof bottom plate (19)
(18), nylon bed course (18) is equipped with mesoporous a (181), and water proof bottom plate (19) is equipped with and the matched mesoporous b of mesoporous a (181)
(191), corrosion-resistant pressure chamber (17) bottom is connected by mesoporous a (181) and mesoporous b (191) with hydraulic pipeline a (20)；
The constant pressure water supply system III include water tank (32), high-pressure hydraulic pump (30), expansion drum (28), adjustable compression release valve (26),
Water pressure gauge (27), safety valve a (25a), safety valve b (25b), placement pipe (24), hydraulic pipeline a (20), hydraulic pipeline b (23),
Hydraulic pipeline c (29), hydraulic pipeline d (31), shunt valve (21) and condensate correcting-distribuing device (22), wherein more hydraulic pipeline a (20) are logical
The input terminal that shunt valve (21) is connected to condensate correcting-distribuing device (22) is crossed, multiply pipeline water set is passed through water-supply-pipe by condensate correcting-distribuing device (22)
Road b (23) is connected with placement pipe (24), and the placement pipe (24) both ends are respectively equipped with safety valve a (25a) and safety valve b
(25b) is equipped with adjustable compression release valve (26) and water pressure gauge (27) close to the side (25b) safety valve b, is equipped among placement pipe (24)
Expansion drum (28), hydraulic pipeline b (23) are connected with safety valve b (25b), safety valve a (25a) by hydraulic pipeline c (29) with
High-pressure hydraulic pump is connected, and high-pressure hydraulic pump (30) is connected by hydraulic pipeline d (31) with water feeding tank (32)；
The data collection system IV includes sensor (33), data line a (34), multiple pressure transmitters (35), data line b
(36), data collecting card (37), data line c (38), computer (39), wherein pressure transmitter (35) quantity and corrosion-resistant pressure
Room (17) quantity matches, and the input terminal of pressure transmitter (35) is connected separately with by more data line a (34) to be arranged resistance to
Corrode the sensor (33) in pressure chamber (17), the output end of pressure transmitter (35) by data line b (36) respectively with data
Capture card (37) is connected, and data collecting card (37) is connected by data line c (38) with computer (39).
2. the pollution preparation of soil sample and testing permeability are detecting device integrated as described in claim 1, it is characterised in that: described
Corrosion resistant metal sintered meshwork is fixed with by pressure-bearing top cover (15) at the top of corrosion-resistant pressure chamber (17) in sample bearing system II
(16), corrosion resistant metal sintered meshwork (16) is arranged between pressure-bearing top cover (15) and corrosion-resistant pressure chamber (17), corrosion-resistant pressure
Room (17) bottom is fixed with nylon bed course (18) by water proof bottom plate (19), nylon bed course (18) setting water proof bottom plate (19) with
Between corrosion-resistant pressure chamber (17), wherein nylon bed course (18) center is equipped with mesoporous a (181), and water proof bottom plate (19) is in mesoporous a
(181) position is equipped with the mesoporous b (191) to match, is respectively equipped with seal groove b on nylon bed course (18) lower section and side wall
(182), the seal groove c (192) for constituting concentric loop state is respectively equipped with above water proof bottom plate (19).
3. the pollution preparation of soil sample and testing permeability are detecting device integrated as claimed in claim 2, it is characterised in that: water proof
Be equipped with mounting groove (193) on the outside of the seal groove c (192) of bottom plate (19), water proof bottom plate (19) by mounting groove (193) with it is corrosion-resistant
Pressure chamber (17) is connected.
4. the pollution preparation of soil sample and testing permeability are detecting device integrated as claimed in claim 2, it is characterised in that: described
Sensor (33) be arranged in corrosion-resistant pressure chamber (17), be transversely provided on the side wall of pressure-bearing top cover (15) water outlet (151) with
Sensor is buried mouth (152), and the data line a (34) of sensor (33) passes through the through-hole in pressure-bearing top cover (15) from pressure-bearing top cover
(15) sensor embedded mouth (152) extends is connected with data collecting card (37).
5. the pollution preparation of soil sample and testing permeability are detecting device integrated as claimed in claim 2, it is characterised in that: described
The lower section of corrosion resistant metal sintered meshwork (16) is equipped with O-shaped seal groove a (153).
6. it is a kind of using the pollution preparation of soil sample and detecting device integrated detection method of testing permeability described in claim 1,
It is characterized by the following steps:
It is packed into O-ring seal on nylon bed course seal groove b (182) and on pressure-bearing top seal slot a (153), by soil sample to be measured
Layering is pressed into corrosion-resistant pressure chamber (17), according to detection soil sample height, is packed into different height in corrosion-resistant pressure chamber (17) bottom
Nylon bed course (18) so that detection soil sample be full of corrosion-resistant pressure chamber (17)；
Corrosion resistant metal sintered meshwork (16) are placed at the top of detection soil sample, corrosion-resistant pressure chamber (17) are installed on water proof bottom plate peace
It on tankage (193), docks nylon bed course mesoporous a (181) with water proof bottom plate mesoporous b (191), hydraulic pipeline a (20) is inserted
Enter mesoporous a (181) and mesoporous b (191), mouth (152) is buried by pressure-bearing top cover sensor, sensor (33) is embedded in detection
At the top of soil sample, pressure-bearing top cover (15) are covered；
Start hydraulic pump (2), forward direction is stirred reversal valve (5), and Column under Axial Load (14) declines under hydraulic action and to pressure-bearing top cover
(15) it presses, when the detection of axis pressure table (10) reading reaches test setting value, reverses reversal valve (5), tieed up using accumulator (7)
Hold pressure；
Open the safety-valve a (25a), starts high-pressure hydraulic pump (30) for the contaminated-fluid in water feeding tank (32) and transports to expansion drum (28)；
High-pressure hydraulic pump (30) and safety valve a (25a) are closed when the detection reading in water pressure gauge (27) reaches test requirements document, simultaneously
Open the safety-valve b (25b) and shunt valve (21), and contaminated-fluid is made to enter detection soil sample bottom through water-stop sheet bottom mesoporous b (191)
Portion；
It adjusts pressure reducing valve (26), and maintains hydraulic pressure P using expansion drum (28), using water pressure gauge (27) present position as benchmark face, benefit
Soil sample bottom piezometric head H can must be detected with the conversion of formula I1, contaminated-fluid infiltration inspection from bottom to top under osmotic pressure effect
Soil sample is surveyed, thus the pollution course of analog detection soil sample；Piezometric head H at the top of detection soil sample is read by computer (39)2,
And the water yield q of pressure-bearing top cover water outlet (151) unit time is measured, the infiltration of corresponding pollution soil sample is calculated using formula II
Saturating coefficient；
P=ρ gH1 Ⅰ
In formula: ρ-fluid density, unit kg/m3；G-acceleration of gravity, value 9.8m/S2；H1- head, unit are
Rice；
In formula: q-water outlet unit time water yield/seepage discharge, unit m3/s；L-specimen height/permeation pathway, unit are
m；A-sample floor space/cross-section of river, unit m2；H1- sample bottom piezometric head, unit m；H2At the top of-sample
Piezometric head, unit m.
7. detection method according to claim 6, it is characterised in that: described to be dispensed using multiple corrosion-resistant pressure chambers (17)
Different detection soil samples can obtain the pollution soil sample of a variety of different pollution levels.
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| CN109085039B (en) * | 2018-09-20 | 2024-04-09 | 广西大学 | Device and method for preparing soil sample for ground penetrating radar polluted soil detection simulation test |
| CN109490041A (en) * | 2018-12-14 | 2019-03-19 | 重庆交通大学 | A kind of test method of test chemical modifying front and back soil body Erosion Law |
| CN110286000A (en) * | 2019-07-16 | 2019-09-27 | 中国科学院海洋研究所 | A kind of fluid sample Suction filtration device and its application method based on ROV |
| CN110553967A (en) * | 2019-08-05 | 2019-12-10 | 谢小英 | Mineral sample permeability coefficient test equipment |
| CN114813508B (en) * | 2022-04-18 | 2023-03-24 | 中国电建集团西北勘测设计研究院有限公司 | System and method for testing discontinuous equivalent permeability coefficient under step-by-step loading action |
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