CN201233393Y - Lab nonsaturated earth substrate attracting force determinator - Google Patents
Lab nonsaturated earth substrate attracting force determinator Download PDFInfo
- Publication number
- CN201233393Y CN201233393Y CNU2008200533699U CN200820053369U CN201233393Y CN 201233393 Y CN201233393 Y CN 201233393Y CN U2008200533699 U CNU2008200533699 U CN U2008200533699U CN 200820053369 U CN200820053369 U CN 200820053369U CN 201233393 Y CN201233393 Y CN 201233393Y
- Authority
- CN
- China
- Prior art keywords
- soil
- laboratory
- suction
- cap
- cup
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000758 substrate Substances 0.000 title abstract 6
- 239000002689 soil Substances 0.000 claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000004927 clay Substances 0.000 claims description 20
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims 3
- 239000007924 injection Substances 0.000 claims 3
- 238000007689 inspection Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 3
- 241001669573 Galeorhinus galeus Species 0.000 abstract 1
- HPNSNYBUADCFDR-UHFFFAOYSA-N chromafenozide Chemical compound CC1=CC(C)=CC(C(=O)N(NC(=O)C=2C(=C3CCCOC3=CC=2)C)C(C)(C)C)=C1 HPNSNYBUADCFDR-UHFFFAOYSA-N 0.000 description 19
- 238000012423 maintenance Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 8
- 238000007789 sealing Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 238000011002 quantification Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a laboratory unsaturation soil substrate suction determinator, which is provided with a cavity; a water filling port, an air discharging port, a pottery plate substrate and a sub-pressure gauge; the tope end of the water filling port is provided with an examination cap; an air discharging cap is arranged on the air discharging port in a rotation way; a high air-intake value porous pottery plate is fixedly arranged on the pottery plate substrate; a capacity-fixed rigid soil cup is inserted in the pottery plate substrate; the sub-pressure gauge is arranged at one side of the water filling port and is made of rigid material; the capacity-fixed rigid soil cup is provided with test soil sample. The determinator has the advantages that technical requirements on the experiment personnel are low, the unsturation soil substrate suction can be quantitatively measured, and the price is low; and the deterinator is applicable to the industrialized production.
Description
Technical field
The utility model relates generally to a kind of laboratory unsaturated soil matric suction analyzer, especially the laboratory unsaturated soil matric suction analyzer that can measure unsaturated soil matric suction quantification in the laboratory.
Background technology
Soil suction is an important parameter of research unsaturated soil engineering properties, soil body suction is not only represented the height of the energy state of soil water, disclose the curvature state of soil water and the interactional intensity of soil particle and unsaturation soil water, aerosphere face, it can be from physical propertys such as more profound announcement soil water, gas laws of motion and native body change, Strength Changes.All distortion and strength problems that relates to unsaturated soil all must be got in touch the suction in the unsaturated soil.It has been generally acknowledged that suction is made up of two parts usually in the soil, i.e. matric suction and infiltration (solute) suction, because osmotic suction is less with the influence of water percentage, and the interior moisture salt content of the soil body is constant generally speaking.Therefore, in unsaturated soil research, only consider matric suction, and the research of matric suction just becomes the basic of unsaturated soil mechanics study.
To the nineties in 20th century, be accompanied by the development of unsaturated soil suction learning concept, the measurement means of suction have also obtained certain enriching.At present, shown in several in the world suction measuring equipments commonly used see the following form:
Table: existing suction method for measurement
In the said method, though some is cheap, be difficult to realize robotization, especially too high to operating personnel's technical requirement, it is bigger influenced by stochastic error, as filter paper method etc.; Some has but hindered applying of its because cost an arm and a leg, as pressure plare instrument method, heat conduction sensor method etc.
And, often exist during use and much be difficult to the limitation that overcomes for low price, tensiometer method simple to operate:
1, the correction of plexi-glass tubular potential head, the pipe range correction of tensiometer system can't accurately be estimated;
2, ceramic head is difficult for well contacting with the tested soil body;
3, can't the experimentize quantification of indoor unsaturated soil matric suction measures.
So, develop that to carry out that the unsaturated soil matric suction measures, unsaturation matric suction instrument low cost, that be easy to quantified controlling in a kind of suitable laboratory be very necessary.
The utility model content
The purpose of this utility model is to overcome the deficiency of prior art and provides a kind of operative technique to require the laboratory unsaturated soil matric suction analyzer of low, suitable laboratory to the measurement of unsaturated soil matric suction quantification.
The purpose of this utility model is achieved by following technical proposals:
A kind of laboratory unsaturated soil matric suction analyzer, be provided with a cavity in its member, described member is provided with water filling port, exhausr port, potter's clay plate pedestal and the vacuum table that is communicated with cavity, the top of described water filling port is installed with a maintenance cap, be installed with an exhaust cap on the described exhausr port, described potter's clay plate pedestal sealing and fixing has a high air-entry value porous potter's clay plate, and sealing is fitted with constant volume rigidity soil cup on the potter's clay plate pedestal.
Improvement of the present utility model, described vacuum table are arranged on a side of water filling port.
Improvement of the present utility model, described member are rigid material.
In the utility model, be provided with soil sample to be measured in the described constant volume rigidity soil cup.
Principle of work of the present utility model is sketched in following:
At first be the preparation soil sample, the required water yield that adds be sprayed onto on the earth material mix thoroughly, in the sealed plastic bag of packing into after leaving standstill slightly, put into closed container shelving 24h then, compactness as requested, converting takes by weighing the soil sample of required quality, with the native sample compacting in the constant volume rigidity soil cup, every layer is hit in fact after require height, hair is dug on the surface, and then add the last layer earth material, and so forth, stop during to appointment line scale, with the end face leveling, the preparation of soil sample to be measured is finished; Open the exhaust cap on this instrument and the maintenance cap on vacuum table top then, the degassing distilled water that will boil cooling repeatedly injects, and treats to put exhaust cap and maintenance cap after full, leaves standstill more than the 48h, so that high air-entry value porous potter's clay plate is fully saturated; The native cup sealing of constant volume rigidity that will have soil sample to be measured once more is inserted on the high air-entry value porous potter's clay plate pedestal, compresses to guarantee that soil sample to be measured and high air-entry value porous potter's clay plate surface fully contact, and being filled to toward water filling port with syringe expires again, and tightens the maintenance cap; Last reading, after beginning to test about 6 hours, reading appears in the negative pressure table, and every observation in 3 hours once, writing time and corresponding matrix suction value can be finished the mensuration of unsaturated soil matric suction.
The utility model is realized the measurement of the soil sample matric suction of surveying by porous potter's clay plate and contacting of constant volume soil sample, advantage is: the operative technique level to the experimenter requires low, can carry out the measurement of quantification to the laboratory to the unsaturated soil matric suction, and price is suitable partially, is fit to suitability for industrialized production.
Description of drawings
Figure is the utility model structural representation.
In the accompanying drawing: 1. vacuum table, 2. maintenance cap, 3. exhaust cap, 4. member, 5. constant volume rigidity soil cup, soil sample 6. to be measured, 7. high air-entry value porous potter's clay plate.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in the figure, a kind of laboratory unsaturated soil matric suction analyzer, be provided with a cavity in its member 4, described member 4 is provided with water filling port, exhausr port, potter's clay plate pedestal and the vacuum table 1 that is communicated with cavity, the top of described water filling port is installed with a maintenance cap 2, be installed with an exhaust cap 3 on the described exhausr port, described potter's clay plate pedestal sealing and fixing has a high air-entry value porous potter's clay plate 7, and sealing is fitted with constant volume rigidity soil cup 5 on the potter's clay plate pedestal.
Improvement of the present utility model, described vacuum table 1 is arranged on a side of water filling port.
Improvement of the present utility model, described member 4 is a rigid material.
In the utility model, be provided with soil sample 6 to be measured in the described constant volume rigidity soil cup 5.
1, the preparation of soil sample:
(1) take by weighing 10kg survey and represent soil sample, through air-dry, roll, sieve, measure air-dry water percentage, water percentage is on request calculated required amount of water, as follows formula:
In the formula: m
wBe required amount of water;
m
iBy being taken by weighing the wind desiceted soil unit mass;
w
0Be air-dry soil sample initial aqueous rate;
W is allotment target water percentage.
(2) the required water yield that adds is sprayed onto on the earth material mixes thoroughly, in the sealed plastic bag of packing into after leaving standstill slightly, put into closed container shelving 24h then;
(3) compactness as requested, converting takes by weighing the soil sample of required quality.With the native sample compacting in the constant volume rigidity soil cup 5, every layer is hit in fact after require height, hair is dug on the surface, and then add the last layer earth material, and so forth.Stop during to appointment line scale, with the end face leveling, soil sample 6 preparations to be measured are finished.
2, open the maintenance cap 2 on exhaust cap 3 and vacuum table 1 top on this instrument, the degassing distilled water that will boil cooling repeatedly injects, and treats to put exhaust cap 3 and maintenance cap 2 after full; Leave standstill more than the 48h, so that high air-entry value porous potter's clay plate 7 is fully saturated.
3, constant volume rigidity soil cup 5 sealings that will have a soil sample 6 to be measured are inserted on the potter's clay plate pedestal, compress to guarantee that soil sample 6 to be measured fully contact with high air-entry value porous potter's clay plate 7 surfaces, and being filled to the past water filling port of syringe expires again, and tightens and overhaul cap 2.
4, observed and recorded:
Because when soil sample 6 to be measured and high air-entry value porous potter's clay plate 7 reach balance, water in the system will have identical negative pressure with the pore water in the soil, and the pore air pressure in the common soil sample to be measured 6 equals atmospheric pressure (tensimeter pressure promptly equals zero), and therefore the negative pore water pressure of reading on vacuum table 1 numerically just equals the matric suction of the soil sample of surveying.After beginning to test about 6 hours, reading appears in the negative pressure table, and every observation in 3 hours once, writing time and corresponding matrix suction value can be finished the mensuration of unsaturated soil matric suction.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200533699U CN201233393Y (en) | 2008-06-05 | 2008-06-05 | Lab nonsaturated earth substrate attracting force determinator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200533699U CN201233393Y (en) | 2008-06-05 | 2008-06-05 | Lab nonsaturated earth substrate attracting force determinator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201233393Y true CN201233393Y (en) | 2009-05-06 |
Family
ID=40619775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200533699U Expired - Fee Related CN201233393Y (en) | 2008-06-05 | 2008-06-05 | Lab nonsaturated earth substrate attracting force determinator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201233393Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915717A (en) * | 2010-07-15 | 2010-12-15 | 上海大学 | Test device for measuring soil suction by filter paper method |
| CN103018128A (en) * | 2012-12-28 | 2013-04-03 | 中南大学 | Different-layer unsaturated soil total suction in situ measurement device and manufacturing method thereof |
| CN103743883A (en) * | 2013-12-23 | 2014-04-23 | 石家庄铁道大学 | Device and method for testing unsaturation soil hysteresis curve |
| CN104165981A (en) * | 2014-07-28 | 2014-11-26 | 西南交通大学 | Suction measuring device in consolidation test |
| CN104777060A (en) * | 2015-04-22 | 2015-07-15 | 三峡大学 | Field soil total suction measurement device based on filter paper method |
| CN105842420A (en) * | 2016-03-28 | 2016-08-10 | 中南大学 | Unsaturated soil tri-axial test matrix suction quick balance apparatus and use method thereof |
| CN109633131A (en) * | 2019-01-29 | 2019-04-16 | 长沙理工大学 | The soft rock matric suction balancing device and matric suction measurement method of controllable temperature pressure control |
| CN111650082A (en) * | 2020-07-22 | 2020-09-11 | 深圳大学 | A kind of measuring device and measuring method of unsaturated soil soil-water characteristic curve |
-
2008
- 2008-06-05 CN CNU2008200533699U patent/CN201233393Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915717A (en) * | 2010-07-15 | 2010-12-15 | 上海大学 | Test device for measuring soil suction by filter paper method |
| CN103018128A (en) * | 2012-12-28 | 2013-04-03 | 中南大学 | Different-layer unsaturated soil total suction in situ measurement device and manufacturing method thereof |
| CN103018128B (en) * | 2012-12-28 | 2015-04-15 | 中南大学 | Different-layer unsaturated soil total suction in situ measurement device and manufacturing method thereof |
| CN103743883A (en) * | 2013-12-23 | 2014-04-23 | 石家庄铁道大学 | Device and method for testing unsaturation soil hysteresis curve |
| CN103743883B (en) * | 2013-12-23 | 2016-01-13 | 石家庄铁道大学 | A device and method for testing hysteretic curve of unsaturated soil |
| CN104165981A (en) * | 2014-07-28 | 2014-11-26 | 西南交通大学 | Suction measuring device in consolidation test |
| CN104165981B (en) * | 2014-07-28 | 2015-11-25 | 西南交通大学 | Observation of The Suction device in a kind of consolidation test |
| CN104777060A (en) * | 2015-04-22 | 2015-07-15 | 三峡大学 | Field soil total suction measurement device based on filter paper method |
| CN105842420A (en) * | 2016-03-28 | 2016-08-10 | 中南大学 | Unsaturated soil tri-axial test matrix suction quick balance apparatus and use method thereof |
| CN109633131A (en) * | 2019-01-29 | 2019-04-16 | 长沙理工大学 | The soft rock matric suction balancing device and matric suction measurement method of controllable temperature pressure control |
| CN109633131B (en) * | 2019-01-29 | 2021-05-14 | 长沙理工大学 | Temperature-controllable and pressure-controllable soft rock matrix suction balancing device and matrix suction measuring method |
| CN111650082A (en) * | 2020-07-22 | 2020-09-11 | 深圳大学 | A kind of measuring device and measuring method of unsaturated soil soil-water characteristic curve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201233393Y (en) | Lab nonsaturated earth substrate attracting force determinator | |
| CN102680665B (en) | Suction accurately controlled pressure plate instrument capable of directly saturating soil sample | |
| CN103472206B (en) | Dual-layer pressure plate instrument for measuring soil-water characteristic curve | |
| CN102183622B (en) | Novel unsaturated soil high-pressure consolidation test device | |
| CN101915718B (en) | Multifunctional soil consolidation and penetration test device and test method thereof | |
| CN101509865B (en) | A device for measuring hydraulic parameters of unsaturated soil | |
| CN101813606B (en) | Test method for measuring permeability coefficient of soil body in saturation state or unsaturation state | |
| CN101865810A (en) | A Test Method for Measuring Moisture Characteristic Parameters of Unsaturated Soil | |
| CN105866000A (en) | Seepage testing apparatus and method for rock with single fracture | |
| CN111650082B (en) | Unsaturated soil water characteristic curve measuring device | |
| CN111238565B (en) | Test method for testing unsaturated geotechnical characteristic relation | |
| CN110261279B (en) | A Simultaneous Measurement Method of Unsaturated Soil Permeability Coefficient and Soil-Water Characteristic Curve Based on Axis Translation | |
| CN103604717B (en) | Measure volume displacement method and the equipment of soil quality moisture content | |
| CN203069461U (en) | Triaxial soil test device under water and soil chemical action | |
| CN103792172B (en) | Adding pressure type falling head permeameter | |
| CN102426151A (en) | Multifunctional soil-water characteristic curve tester | |
| CN204405439U (en) | A kind of high compression amount consolidation testing device | |
| CN205786625U (en) | A Soil-Water Characteristic Curve Experimental Instrument with Controllable Vertical Stress | |
| CN113176391A (en) | Soil testing device | |
| CN112945754B (en) | System and method for testing shear strength of expansive soil under dry-wet cycle action | |
| CN101806701B (en) | Testing apparatus used for measuring osmotic potential of unsaturated soil | |
| CN109060631A (en) | A kind of varying head permeability coefficient measuring system and measurement method | |
| CN101865811B (en) | A Method for Measuring the Permeability Coefficient of Unsaturated Soil | |
| CN111610131A (en) | Device and method for nondestructive determination of soil porosity | |
| CN204944999U (en) | A kind of simple and easy humidification soil sample pore water pressure real-time test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20110605 |