CN102175515A - Vacuum saturation device for soil engineering centrifugal model test - Google Patents
Vacuum saturation device for soil engineering centrifugal model test Download PDFInfo
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- CN102175515A CN102175515A CN 201110028218 CN201110028218A CN102175515A CN 102175515 A CN102175515 A CN 102175515A CN 201110028218 CN201110028218 CN 201110028218 CN 201110028218 A CN201110028218 A CN 201110028218A CN 102175515 A CN102175515 A CN 102175515A
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- 239000002689 soil Substances 0.000 title abstract description 26
- 229920006395 saturated elastomer Polymers 0.000 claims description 77
- 230000001105 regulatory effect Effects 0.000 claims description 26
- 239000011555 saturated liquid Substances 0.000 claims description 18
- 239000000446 fuel Substances 0.000 claims description 8
- 229920005479 Lucite® Polymers 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 238000004146 energy storage Methods 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000033764 rhythmic process Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The invention relates to a vacuum saturation device for a soil engineering centrifugal model test, and the device provided by the invention comprises a vacuum pump used for supplying power to the whole device, wherein one end of the vacuum pump is connected to a power control cabinet while the other end of the vacuum pump is connected to a water vapor separating jar which is used as the energy storage of the whole device; the water vapor separating jar is connected to the power control cabinet through an electric contact vacuum pressure gage; the vacuum pump is turned off and turned on in real time according to the higher and lower limit values of pressure preset by the electric contact vacuum pressure gage; a three-way valve is arranged on the top of the water vapor separating jar; a first vapor outlet of the three-way valve is connected to a saturation box for supplying a saturation space through a first pipeline; the saturation box is separated from the whole device; a second vapor outlet of the three-way valve is connected to an oil supply jar of a saturation system through a second pipeline; and the bottom of the oil supply jar is connected to a model box in the saturation box through a third pipeline. The vacuum saturation device is not limited by the volume of a saturation object, the saturation speed is controllable, and the saturation quality is ensured.
Description
Technical field
The present invention relates to a kind ofly can under the specified vacuum degree, carry out saturated geotechnical centrifugal model test vacuum saturation device to the model soil sample with given pace.
Background technology
About geotechnical centrifugal model test Design of device and few, only be useful on the imaging device and the model measurement stake of model test at present, do not find to be applicable to the vacuum saturation device of geotechnical centrifugal model test temporarily.
Geotechnical centrifugal model test has special requirement to model soil sample saturated.At first, the volume of saturated object is bigger.Be subjected to the restriction of hydro-extractor maximum centrifugal acceleration and existing sensor intensity, model scale can not be too big, causes the model casing size of splendid attire model soil sample can not be too little, generally reaches 1m
3Rank.Secondly, the saturation time of model soil sample is longer.Because the saturation degree of model soil sample is very big to the experimental result influence, therefore, guarantee the confidence level of experimental result in order to make the model soil sample obtain bigger saturation degree, require the saturated model soil sample as far as possible slowly, certainly will cause whole saturation history will continue the long time.Once more, the pressure reduction of saturated model soil sample can only be within certain scope.In the geotechnical centrifuge model experiment, the saturation history of model soil sample is very complicated: on the one hand, overcome the seepage force effect of soil sample, require Negative Pressure Difference that certain lower limit is arranged; On the other hand, saturated speed again can not be too fast, otherwise the seepage failure of meeting generation model soil sample, this will must have the certain upper limit value again by negate pressure reduction.Therefore in the geotechnical centrifuge model experiment, the saturated Negative Pressure Difference that requires of model soil sample is in certain scope.At last, the saturated velocity of model soil sample requires controlled.In geotechnical centrifugal model test, the saturated of model soil sample is from the bottom, generally requires the liquid level of saturated liquid to be higher than about the 1cm of model soil sample surface.In saturation history, model casing is placed in the saturated case, generally can't see liquid level variation, and conventional way is to preestablish a saturation time, reaches " 1cm " such requirement by the control saturated velocity.Saturated velocity is too big, exceeds the requirement of 1cm even overflows model casing; Saturated velocity is too little, and the model soil sample on top can not be saturated, and this just requires in saturation history, must control saturated speed well.
Existing saturation device exists the volume of saturated object less, and saturation time is short, and certain negative pressure reduction can not be set, and the uncontrollable deficiency of saturated speed can not satisfy the singularity requirement of the saturated preparation of soil sample of geotechnical centrifugal model test fully.
Summary of the invention
The present invention will overcome existing saturation device above shortcomings, provides a kind of saturability not to be subjected to saturated object volume restrictions and the controlled geotechnical centrifugal model test vacuum saturation device of saturated velocity.
The technical solution adopted for the present invention to solve the technical problems is:
Geotechnical centrifugal model test vacuum saturation device, being included as package unit provides the vacuum pump of power, it is characterized in that: an end of described vacuum pump is connected with electrical power control cabinet, the other end links to each other with steam separating tank as the accumulator of package unit, described steam separating tank is connected with described electrical power control cabinet by the electric contact pressure vacuum gauge, and described vacuum pump cuts out in real time according to the upper pressure limit value of described electric contact pressure vacuum gauge setting and lower limit and starts; The top of described steam separating tank is provided with T-valve, and the air intake opening of described T-valve is installed on the described steam separating tank; First gas outlet of described T-valve is connected to the saturated case that is used to provide saturated space by pipeline one, and described saturated case is separated from package unit, which is provided with precision pressure gauge; Second gas outlet of described T-valve is connected to the oil supply tank of saturation system by pipeline two; Described saturation system comprises bracing frame, and described fuel feeding is irritated and is fixed on the support frame as described above, and described oil supply tank is used to provide saturated liquid, and its bottom is connected to model casing in the saturated case by pipeline three;
Described pipeline one is composed in parallel by lucite pipe by first vacuum regulating valve and first ball valve, be used for coarse adjustment and the pressure of finely tuning described saturated case, because saturated case volume is bigger, adopt thinner pipeline to vacuumize and to take the long time, therefore vacuumizing the starting stage, utilizing the extra heavy pipe line that is connected to first ball valve; When the vacuum tightness of saturated case during near default value, close first ball valve, adopt first vacuum regulating valve that the vacuum tightness of saturated case is carried out accurate adjustment, make it reach default vacuum tightness;
Described pipeline two is used to regulate the pressure of described oil supply tank for being connected to the vent line of second vacuum regulating valve;
Described pipeline three is the oil pipe road, is composed in series by the flowmeter and the 3rd ball valve of adjustable speed, and described flowmeter is used to regulate the flow velocity of saturated liquid.
Further, the top that described fuel feeding is irritated is connected with the supply that communicates with it and irritates, and the uncovered support frame as described above top that is fixed on is irritated in described supply, is used for supply saturated liquid in described oil supply tank.
Preferably, the volume of described saturated case can be determined according to the size of model casing, and its putting position can change flexibly according to the test site.
Preferably, the material that described fuel feeding is irritated and supply is irritated is an organic glass.
During use, after each component-assembled of package unit finished, carry out saturated to the model soil sample in the hydro-extractor model casing by following steps:
The first, close all ball valves and regulate flowmeter and make it be in closed condition, in the supply jar, add and want saturated liquid, open second ball valve and make saturated liquid flow into oil supply tank, up to be full of its volume 80% till, close second ball valve.
The second, regulate the electric contact pressure vacuum gauge, the higher limit of set pressure and lower limit.
The 3rd, open the 4th ball valve and power supply vacuum pump is started.
The 4th, open the 5th ball valve, first ball valve and vacuum regulating valve, saturated case is vacuumized, the vacuum tightness in saturated case is closed first ball valve near default value, regulates vacuum regulating valve and makes the interior pressure of saturated case reach the force value of setting; Regulate vacuum regulating valve, make the pressure of oil supply tank reach default value.
The 5th, the pressure for the treatment of saturated case and oil supply tank begins to carry out saturated when all reaching the value of setting, open the 3rd ball valve, regulates flowmeter, makes the flow velocity of saturated liquid reach the value of setting, and record is constantly simultaneously.
Pipeline one is formed in parallel by lucite pipe by first vacuum regulating valve and first ball valve, not only can vacuumize saturated case apace and raise the efficiency, and the vacuum tightness that can regulate saturated case subtly simultaneously realizes coarse adjustment and accurate adjustment to saturated case pressure; Second vacuum regulating valve is installed on the pipeline two, can accurately controls the oil supply tank pressure inside; By the vacuum regulating valve of this two circuits, can be exactly the saturated Negative Pressure Difference of model soil sample be controlled in the scope of setting.
Pipeline three is connected to the flowmeter that can regulate flow velocity, and under the cooperation of the 3rd vacuum regulating valve, the flow velocity that can regulate saturated liquid is controlled the rhythm of whole saturation history, to guarantee saturated quality.
Beneficial effect of the present invention:
(1) remedied the little deficiency in the saturated space of conventional saturation device, by separating the saturated of the model soil sample that realizes that volume is bigger in saturated space (saturated case is set separately), the volume of saturated case can be determined according to the size of model casing, and its putting position can change flexibly according to the test site.
(2) by the vacuum regulating valve of pipeline one and pipeline two, accurately the saturated vacuum tightness of controlling models soil sample guarantees needed any one the vacuum tightness environment of experiment, fully satisfies the desired particular range of geotechnical centrifuge model experiment.
(3) the upper pressure limit value set according to the electric contact pressure vacuum gauge of vacuum pump and lower limit are closed in real time and are started, and do not need the running of long-time overload, thereby satisfied the long requirement of geotechnical centrifuge model experiment model soil sample saturation time, do not needed manual control.
(4) use the flowmeter of adjustable speed to control saturated speed, guarantee saturated quality.
Description of drawings
Fig. 1 is a wiring layout of the present invention.
1. electrical power control cabinets among the figure, 2. vacuum pump, 3. electric contact pressure vacuum gauge, 4. the 4th ball valve, 5. steam separating tank, 6. the 5th ball valve, 7. T-valve, 8. first vacuum regulating valve, 9. first ball valve, 10. saturated case, 11. precision pressure gauge, 12. second vacuum regulating valves, 13. supply jars, 14. second ball valve, 15. oil supply tanks, 16. flowmeters, 17. bracing frame, 18. the 3rd ball valves, 19. model casings.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
With reference to Fig. 1, geotechnical centrifugal model test vacuum saturation device of the present invention, being included as package unit provides the vacuum pump 2 of power, one end of described vacuum pump 2 is connected with electrical power control cabinet 1, the other end of described vacuum pump 2 links to each other with steam separating tank 5 as the accumulator of package unit, described steam separating tank 5 is connected with described electrical power control cabinet by electric contact pressure vacuum gauge 3, and described vacuum pump 2 cuts out in real time according to the upper pressure limit value of described electric contact pressure vacuum gauge 3 and lower limit and starts; The top of described steam separating tank 5 is provided with T-valve 7, and the air intake opening of described T-valve 7 is installed on the described steam separating tank 5; First gas outlet of described T-valve 7 is connected to the saturated case 10 that is used to provide saturated space by pipeline one, and described saturated case 10 is separated from package unit, which is provided with precision pressure gauge 11; Second gas outlet of described T-valve 7 is connected to the oil supply tank 15 of saturation system by pipeline two; Described saturation system comprises bracing frame 17, and described fuel feeding is irritated 15 and is fixed on the support frame as described above 17, and described oil supply tank 15 is used to provide saturated liquid, and its bottom is connected to model casing 19 in the saturated case 10 by pipeline three;
Described pipeline one is composed in parallel by lucite pipe by first vacuum regulating valve 8 and first ball valve 9, be used for coarse adjustment and the pressure of finely tuning described saturated case 10, because saturated case 10 volumes are bigger, adopt thinner pipeline to vacuumize and to take the long time, therefore vacuumizing the starting stage, utilizing the extra heavy pipe line that is connected to first ball valve 9; When the vacuum tightness of saturated case 10 during near default value, close first ball valve 9, adopt the vacuum tightness of 8 pairs of saturated casees 10 of first vacuum regulating valve to carry out accurate adjustment, make it reach default vacuum tightness;
Described pipeline two is used to regulate the pressure of described oil supply tank 15 for being connected to the vent line of second vacuum regulating valve 12;
Described pipeline three is the oil pipe road, is composed in series by the flowmeter 16 and the 3rd ball valve 18 of adjustable speed, and described flowmeter 16 is used to regulate the flow velocity of saturated liquid.
The top of described fuel feeding filling 15 is connected with the supply that communicates with it and irritates 13, and 13 uncovered support frame as described above 17 tops that are fixed on are irritated in described supply, are used for supply saturated liquid in described oil supply tank 15.
The volume of described saturated case 10 can be determined according to the size of model casing 19, and its putting position can change flexibly according to the test site.
The material of described fuel feeding filling 15 and supply filling 13 is an organic glass.
During use, after each component-assembled of package unit finished, carry out saturated to the model soil sample in the hydro-extractor model casing by following steps:
The first, close all ball valves and regulate flowmeter 16 and make it be in closed condition, in supply jar 13, add and want saturated liquid, open second ball valve 14 and make saturated liquid flow into oil supply tank 15, up to be full of its volume 80% till, close second ball valve 14.
The second, regulate electric contact pressure vacuum gauge 3, the higher limit of set pressure and lower limit.
The 3rd, open the 4th ball valve 4 and power supply vacuum pump 2 is started.
The 4th, open the 5th ball valve 6, first ball valve 9 and vacuum regulating valve 8, saturated case 10 is vacuumized, the vacuum tightness in saturated case 10 is near default value, close first ball valve 9, regulate vacuum regulating valve 8 and make saturated case 10 interior pressure reach the force value of setting; Regulate vacuum regulating valve 12, make the pressure of oil supply tank 15 reach default value.
The 5th, the pressure for the treatment of saturated case 10 and oil supply tank 15 begins to carry out saturated when all reaching the value of setting, open the 3rd ball valve 18, regulates flowmeter 16, makes the flow velocity of saturated liquid reach the value of setting, and record is constantly simultaneously.
Pipeline one is formed in parallel by lucite pipe by first vacuum regulating valve 8 and first ball valve 9, not only can vacuumize saturated case 10 apace and raise the efficiency, the vacuum tightness that simultaneously can regulate saturated case 10 subtly realizes coarse adjustment and accurate adjustment to saturated case 10 pressure; Second vacuum regulating valve 12 is installed on the pipeline two, can accurately controls oil supply tank 15 pressure inside; By the vacuum regulating valve of this two circuits, can be exactly the saturated Negative Pressure Difference of model soil sample be controlled in the scope of setting.
Pipeline three is connected to the flowmeter 16 that can regulate flow velocity, and under the cooperation of the 3rd vacuum regulating valve 18, the flow velocity that can regulate saturated liquid is controlled the rhythm of whole saturation history, to guarantee saturated quality.
The described content of this instructions embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (2)
1. geotechnical centrifugal model test vacuum saturation device, being included as package unit provides the vacuum pump of power, it is characterized in that: an end of described vacuum pump is connected with electrical power control cabinet, the other end links to each other with steam separating tank as the accumulator of package unit, described steam separating tank is connected with described electrical power control cabinet by the electric contact pressure vacuum gauge, and described vacuum pump cuts out in real time according to the upper pressure limit value of described electric contact pressure vacuum gauge setting and lower limit and starts; The top of described steam separating tank is provided with T-valve, and the air intake opening of described T-valve is installed on the described steam separating tank; First gas outlet of described T-valve is connected to the saturated case that is used to provide saturated space by pipeline one, and described saturated case is separated from package unit, which is provided with precision pressure gauge; Second gas outlet of described T-valve is connected to the oil supply tank of saturation system by pipeline two; Described saturation system comprises bracing frame, and described fuel feeding is irritated and is fixed on the support frame as described above, and described oil supply tank is used to provide saturated liquid, and its bottom is connected to model casing in the saturated case by pipeline three;
Described pipeline one is composed in parallel by lucite pipe by first vacuum regulating valve and first ball valve, be used for coarse adjustment and the pressure of finely tuning described saturated case, because saturated case volume is bigger, adopt thinner pipeline to vacuumize and to take the long time, therefore vacuumizing the starting stage, utilizing the extra heavy pipe line that is connected to first ball valve; When the vacuum tightness of saturated case during near default value, close first ball valve, adopt first vacuum regulating valve that the vacuum tightness of saturated case is carried out accurate adjustment, make it reach default vacuum tightness;
Described pipeline two is used to regulate the pressure of described oil supply tank for being connected to the vent line of second vacuum regulating valve;
Described pipeline three is the oil pipe road, is composed in series by the flowmeter and the 3rd ball valve of adjustable speed, and described flowmeter is used to regulate the flow velocity of saturated liquid.
2. geotechnical centrifugal model test vacuum saturation device according to claim 1, it is characterized in that: the top that described fuel feeding is irritated is connected with the supply that communicates with it and irritates, the uncovered support frame as described above top that is fixed on is irritated in described supply, is used for supply saturated liquid in described oil supply tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100282184A CN102175515B (en) | 2011-01-26 | 2011-01-26 | Vacuum saturation device for soil engineering centrifugal model test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100282184A CN102175515B (en) | 2011-01-26 | 2011-01-26 | Vacuum saturation device for soil engineering centrifugal model test |
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| CN102175515A true CN102175515A (en) | 2011-09-07 |
| CN102175515B CN102175515B (en) | 2012-11-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706711A (en) * | 2012-06-13 | 2012-10-03 | 中国水利水电科学研究院 | Geotechnical-engineering centrifugal model saturation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060117836A1 (en) * | 2004-12-08 | 2006-06-08 | Board Of Regents, The University Of Texas System | Centrifuge permeameter for unsaturated soils system |
| CN101201310A (en) * | 2006-12-14 | 2008-06-18 | 中国科学院东北地理与农业生态研究所 | Vacuum watering device for measuring soil water stable aggregate |
| CN202033229U (en) * | 2011-01-26 | 2011-11-09 | 浙江大学 | Vacuum saturation device for geotechnical centrifuge model test |
-
2011
- 2011-01-26 CN CN2011100282184A patent/CN102175515B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060117836A1 (en) * | 2004-12-08 | 2006-06-08 | Board Of Regents, The University Of Texas System | Centrifuge permeameter for unsaturated soils system |
| CN101201310A (en) * | 2006-12-14 | 2008-06-18 | 中国科学院东北地理与农业生态研究所 | Vacuum watering device for measuring soil water stable aggregate |
| CN202033229U (en) * | 2011-01-26 | 2011-11-09 | 浙江大学 | Vacuum saturation device for geotechnical centrifuge model test |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706711A (en) * | 2012-06-13 | 2012-10-03 | 中国水利水电科学研究院 | Geotechnical-engineering centrifugal model saturation device |
| CN102706711B (en) * | 2012-06-13 | 2014-04-02 | 中国水利水电科学研究院 | Geotechnical-engineering centrifugal model saturation device |
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| Publication number | Publication date |
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| CN102175515B (en) | 2012-11-21 |
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