CN102706711B - Geotechnical-engineering centrifugal model saturation device - Google Patents
Geotechnical-engineering centrifugal model saturation device Download PDFInfo
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- CN102706711B CN102706711B CN201210194836.0A CN201210194836A CN102706711B CN 102706711 B CN102706711 B CN 102706711B CN 201210194836 A CN201210194836 A CN 201210194836A CN 102706711 B CN102706711 B CN 102706711B
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Abstract
The invention relates to a geotechnical-engineering centrifugal model saturation device comprising a saturation box, at least one vacuum pump, at least one model box and a solution cabinet, wherein the model box is arranged in the saturation box; the saturation box comprises a box body and a sealing cover; a water penetration pipe used for delivering liquid is arranged at the bottom of the model box; multiple holes are arranged on the wall of the water penetration pipe; one end of the water penetration pipe is connected with a water delivery pipe which is vertically placed; the model box is internally further provided with a test model covering on the water penetration pipe; and the solution cabinet comprises a cabinet body and an upper cover, wherein the upper cover is provided with a stirring motor and a stirrer connected with the stirring motor. The geotechnical-engineering centrifugal model saturation device increases the saturation degree of the test model through a saturation process form inside to outside and can maintain the mixing uniformity of a solution in the long-time saturation process and enhance the quality of the solution.
Description
Technical field
The present invention relates to a kind ofly for the model that Geotechnical Centrifugal Model Test is used, carry out saturated device.
Background technology
In many engineering sciences, usually need to go with the physical model of little guide essence and the mechanism of announcement and analysis phenomenon, to verify and to solve engineering problem.For example, in Geotechnical Engineering, the gravity stress of soil is conventionally dominant, and mechanical characteristic and the hydraulic performance of soil change with stress level.Utilize the test of little guide centrifugal model, can adopt the material identical with prototype, in the high acceleration field forming at centrifugal testing machine, reach the stress level identical with prototype, thereby model is equated with the ess-strain of prototype, be out of shape similar, failure mechanism is identical, can reproduce prototype characteristic, for the analytical approachs such as theoretical and numerical value provide true and reliable parameter foundation.
When utilizing geotechnical centrifuge research to invade the ground situation of change under earthquake conditions such as dam body under profit line about liquefaction of sand or water resources dam, need to utilize the higher dynamic viscosity coefficient of glutinousness liquid to simulate the stressed conduction situation of water in prototype, therefore just need to use glutinousness liquid to carry out saturated to the test model for Geotechnical Centrifugal Model Test.
But the design of the device of the current relevant treatment about the test model for Geotechnical Centrifugal Model Test is also few, particularly when carrying out when saturated the test model for Geotechnical Centrifugal Model Test, existing method is mainly that the mode by spraying sprays liquid on geotechnological centrifugal model, by Liquid Penetrant, geotechnological centrifugal model is reached capacity, but this saturation process from outside to inside can not well be controlled for the saturation degree of geotechnological centrifugal model, often, after the cost plenty of time, geotechnological centrifugal model inside does not still reach desired saturation degree.
Chinese patent CN202033229U has proposed a kind of geotechnical centrifugal model test vacuum saturation device, but what it still adopted is from the outside inside infiltration saturation process of model, and, because the saturation history of geotechnological centrifugal model often reaches a couple of days even a few hours, for using viscous liquid to carry out when saturated model, how to control viscous liquid and in saturation history, keep stable mixture homogeneity, this patent does not provide solution yet.
Summary of the invention
The invention provides a kind of geotechnological centrifugal model saturation device, this equipment can reduce or avoid problem noted earlier.
For addressing the above problem, the present invention proposes a kind of geotechnological centrifugal model saturation device, it comprises:
A saturated case, at geotechnological centrifugal model saturation history sealing test model, thereby forms vacuum around at described test model,
At least one solution cabinet, for storing for making the solution that geotechnological centrifugal model is saturated,
At least one vacuum pump, for described saturated case and described solution cabinet are formed to vacuum,
At least one is placed in the model casing in described saturated case, for carrying described test model, and carries described solution to described test model,
Described saturated case comprises a casing and a gland bonnet, and described casing is provided with exhaust tube and at least one feed pipe, and described exhaust tube is connected with described vacuum pump,
Described model casing is arranged in described saturated case, and described gland bonnet is provided with transparent watch window; Described model casing bottom is provided with the soakaway trench for delivery of liquid, the tube wall of described soakaway trench is provided with a plurality of holes, one end of described soakaway trench is connected with a water-supply-pipe of vertically placing, in described model casing, be further provided with a described test model covering on described soakaway trench, described water-supply-pipe height is greater than described test model height;
Described solution cabinet comprises cabinet and upper cover, described bottom of cabinet bulk is provided with drainpipe, described cabinet top is provided with gas outlet, and described gas outlet is connected with described vacuum pump, and described drainpipe is connected by the described feed pipe of described saturated case and the described water-supply-pipe of described model casing;
The stirrer that the described upper cover of described solution cabinet is provided with stirring motor and is connected with described stirring motor, the length of described stirrer is less than the height of described cabinet.
Preferably, described geotechnological centrifugal model saturation device further comprises a switch board, and described switch board is connected with described vacuum pump and described stirring motor respectively.
Preferably, the described cabinet arranged outside of described solution cabinet has a solution height observation device.
Preferably, described geotechnological centrifugal model saturation device further comprises a solution supply tank, and described solution supply tank comprises a taphole, and described solution cabinet further comprises a fluid infusion mouth, and described taphole is connected with described fluid infusion mouth.
Preferably, the described feed pipe of fluid infusion mouth, drainpipe, gas outlet and the described saturated case of described solution cabinet is provided with solenoid valve, and described solenoid valve is all connected with described switch board.
Preferably, described stirrer is propeller mixer, comprises at least one group of 3 pusher propeller leaves, the rotating shaft of described stirrer and described upper cover out of plumb.
Preferably, described stirrer is turbine type agitator.
Geotechnological centrifugal model saturation device provided by the present invention, by making solution and test model that geotechnological centrifugal model is saturated all be placed in certain vacuum tightness environment by being used for, utilize gravity or the vacuum pressure reduction of solution self, by the soakaway trench under described test model, complete saturation history, can improve by saturation history from the inside to the outside described test model saturation degree like this.In saturation history, by stirrer, solution is stirred, can in long-time saturation history, keep the mixture homogeneity of solution like this, can there is the Bas Discharged of group in solution simultaneously, promote the quality of solution.
Accompanying drawing explanation
The following drawings is only intended to the present invention to schematically illustrate and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is according to the structural representation of the geotechnological centrifugal model saturation device of a specific embodiment of the present invention;
Fig. 2 is the structural representation of the solution cabinet of the geotechnological centrifugal model saturation device shown in Fig. 1;
Fig. 3 is the structural representation of the saturated case of the geotechnological centrifugal model saturation device shown in Fig. 1;
Fig. 4 is the structural representation of the model casing of the geotechnological centrifugal model saturation device shown in Fig. 1.
Embodiment
For technical characterictic of the present invention, object and effect being had more clearly, understand, now contrast accompanying drawing explanation the specific embodiment of the present invention.Wherein, identical parts adopt identical label.
Describe in detail with reference to the accompanying drawings according to the structure of a kind of geotechnological centrifugal model saturation device of the present invention and principle thereof.
Fig. 1 is according to the structural representation of the geotechnological centrifugal model saturation device of a specific embodiment of the present invention; Fig. 2 is the structural representation of the solution cabinet of the geotechnological centrifugal model saturation device shown in Fig. 1; Fig. 3 is the structural representation of the saturated case of the geotechnological centrifugal model saturation device shown in Fig. 1; Fig. 4 is the structural representation of the model casing of the geotechnological centrifugal model saturation device shown in Fig. 1.Participate in shown in Fig. 1-4, geotechnological centrifugal model saturation device provided by the present invention, it comprises:
A saturated case 1, it is for geotechnological centrifugal model saturation history sealing test model 5, thereby forms vacuum around at described test model 5,
At least one solution cabinet 2, for storing for making the solution that geotechnological centrifugal model is saturated,
At least one vacuum pump 3, for described saturated case 1 and described solution cabinet 2 are formed to vacuum,
At least one is placed in the model casing 4 in described saturated case 1, for carrying described test model 5, and carries described solution to described test model 5,
Described saturated case 1 comprises a casing 11 and a gland bonnet 12, and described casing 11 is provided with exhaust tube 111 and at least one feed pipe 112, and described exhaust tube 111 is connected with described vacuum pump 3,
Described model casing 4 is arranged in described saturated case 1, described gland bonnet 12 is provided with transparent watch window 121, described model casing 4 bottoms are provided with for delivery of liquid soakaway trench 41, the tube wall of described soakaway trench 41 is provided with a plurality of holes, one end of described soakaway trench 41 is connected with a water-supply-pipe 42 of vertically placing, described model casing 4 is interior is further provided with a described test model 5 covering on described soakaway trench 41, and described water-supply-pipe 42 is highly greater than described test model 5 height.
Described solution cabinet 2 comprises cabinet 21 and upper cover 22, described cabinet 21 bottoms are provided with drainpipe 211, described cabinet 21 tops are provided with gas outlet 212, described gas outlet 212 is connected with described vacuum pump 3, and described drainpipe 211 is connected by the described feed pipe 122 of described saturated case 1 and the described water-supply-pipe 42 of described model casing 4.
The stirrer 222 that the described upper cover 22 of described solution cabinet 2 is provided with stirring motor 221 and is connected with described stirring motor 221, the length of described stirrer 222 is less than the height of described cabinet 21.
When needs carry out when saturated described test model 5, can first according to soakaway trench 41 described in described test model 5 shapes, large young pathbreaker, in described model casing 4 bottoms, put as curve shape, such as spirality, level are snakelike, or put snakelike for what have height to rise and fall, can increase like this contact area of described soakaway trench 41 and described test model 5, ensure solution quantity delivered; Then can on described soakaway trench 41, cover described test model 5 is set, the water-supply-pipe 42 of the vertical placement being connected with one end of described soakaway trench 41 is higher than the height of described test model 5, so not when access water source, can not affect the described test model 5 having placed, described water-supply-pipe 42, lower than the height of described model casing 4, can not affect the sealing to described model casing 4 like this.
Described soakaway trench 41 can be pipe, described hole setting on described soakaway trench 41 tube walls can be axially spaced-apart 1cm, and spaced radial 120 degree are uniformly distributed, and can be also axially spaced-apart 1.5cm, spaced radial 60 degree are uniformly distributed, and described hole diameter is 0.2-3mm.Can ensure that so described soakaway trench 41 oozes out solution uniformly in described test model 5 inside, thereby ensure the effective saturation of described test model 5.
In described model casing 4, set after described test model 5, described model casing 4 can be placed as described in casing 11, use flexible pipe to connect described water-supply-pipe 42 and described feed pipe 112.Then use described gland bonnet 12 to cover described casing 11, described exhaust tube 111 is connected with described vacuum pump 3.Described gland bonnet 12 can be used organic glass that transparent watch window 121 is set, and can observe at any time like this degree of saturation of described test model 5.
Described solution cabinet 2 is placed on to the position higher than described saturated case 1, uses pipeline that described feed pipe 112 is connected with described drainpipe 211,, described gas outlet 212 is connected with described vacuum pump 3 meanwhile.
When needs are used viscosity solution, geotechnological centrifugal model is carried out when saturated, viscosity solution can be allocated with methylcellulose, the methocel solution according to the needs allotment of test with certain viscosity, when preparing solution well after, the described cabinet 21 that packs described solution cabinet 2 into, cover described upper cover 22 by described solution cabinet 2 good seals, the stirrer 222 that described upper cover 22 is provided with stirring motor 221 and is connected with described stirring motor 221, the length of described stirrer 222 is less than the height of described cabinet 21, like this after covering described upper cover 22, described stirrer 222 just can immerse in solution.
Connecting described saturated case 1, after described solution cabinet 2 and described vacuum pump 3, open described vacuum pump 3, can be in described saturated case 1 and the interior formation vacuum of described solution cabinet 2, due to the position higher than described saturated case 1, the position of described solution cabinet 2, when described saturated case 1 is identical with vacuum tightness in described solution cabinet 2, solution just can flow into described water-supply-pipe 42 by pipeline under self gravitation effect, and the seepage force that overcomes described test model 5 by the hole on described soakaway trench 41 from the inside of described test model 5 is saturated to described test model 5 external penetration.
Certainly, also can regulate the vacuum tightness in described saturated case 1 and described solution cabinet 2, make described solution cabinet 2 and described saturated case 1 form pressure reduction, adjust the saturation rate of solution to described test model 5.
In saturation history, by described stirring motor 221, described stirrer 222 is stirred in solution, so just can in long-time saturation history, keep the mixture homogeneity of solution, can have the Bas Discharged of group in solution, promote the quality of solution simultaneously.
After saturated the completing of described test model 5, just can recover the atmospheric pressure of described saturated case 1 and described solution cabinet 2, open described gland bonnet 12, described model casing 4 be put into geotechnical centrifuge from described saturated case 1 takes out and further test.
In a preferred embodiment, described geotechnological centrifugal model saturation device further comprises a switch board 6, and described switch board 6 is connected with described vacuum pump 3 and described stirring motor 221 respectively.Like this can be by vacuum pump 3 and described stirring motor 221 described in described switch board centralized control.
In a preferred embodiment, described cabinet 21 arranged outside of described solution cabinet 2 have a solution height observation device 213.Described solution height observation device 213 can be two ends respectively with the described cabinet sealing hollow organic-glass pipe that Shang Xia 21, two ends are connected, so just can from described solution height observation device 213, observe at any time the capacity situation of the solution in described solution cabinet 2.
In a preferred embodiment, described geotechnological centrifugal model saturation device further comprises a solution supply tank 7, described solution supply tank 7 comprises a taphole, and described solution cabinet 2 further comprises a fluid infusion mouth 23, and described taphole is connected with described fluid infusion mouth 23.When the needed solution of described test model 5 is many, can, at the interior placement solution of described solution supply tank 7, in saturation history, be described solution cabinet 2 make-up solution at any time easily.
In a preferred embodiment, the described feed pipe 112 of the fluid infusion mouth 23 of described solution cabinet 2, drainpipe 211, gas outlet 212 and described saturated case 1 is provided with solenoid valve 8, and described solenoid valve 8 is all connected with described switch board 6.So just can by described switch board 6, concentrate and adjust described saturated case 1 and the vacuum tightness of described solution cabinet 2, the supplementary degree of the solution of described solution cabinet 2 and described solution enter the flow velocity of described saturated case 1 at any time.
In a preferred embodiment, described stirrer 222 is propeller mixer, comprises at least one group of 3 pusher propeller leaves, the rotating shaft of described stirrer 222 and described upper cover 22 out of plumb.The rotating shaft of described like this stirrer 222 is exactly oblique insertion solution, when solution is stirred, just can make the closed circuit of liquid stream asymmetric, can increase turbulence, solution is mixed more abundant.
In a preferred embodiment, described stirrer 222 is turbine type agitator.Can cause when rotated like this Radial Flow of height turbulence, solution be mixed more abundant.
Geotechnological centrifugal model saturation device provided by the present invention, by solution and test model are all placed in to certain vacuum tightness environment, utilize gravity or the vacuum pressure reduction of solution self, by the soakaway trench under described test model, complete saturation history, can improve by saturation history from the inside to the outside described test model saturation degree like this.In saturation history, by stirrer, solution is stirred, can in long-time saturation history, keep the mixture homogeneity of solution like this, can there is the Bas Discharged of group in solution simultaneously, promote the quality of solution.
Although it will be appreciated by those skilled in the art that the present invention is described according to the mode of a plurality of embodiment, not each embodiment only comprises an independently technical scheme.For the purpose of in instructions, so narration is only used to know; those skilled in the art should make instructions as a wholely to be understood, and regard technical scheme related in each embodiment as the mode that can mutually be combined into different embodiment understand protection scope of the present invention.
The foregoing is only the schematic embodiment of the present invention, not in order to limit scope of the present invention.Any those skilled in the art, not departing from equivalent variations, modification and the combination of doing under the prerequisite of design of the present invention and principle, all should belong to the scope of protection of the invention.
Claims (7)
1. a geotechnological centrifugal model saturation device, it comprises,
A saturated case, at geotechnological centrifugal model saturation history sealing test model, thereby forms vacuum around at described test model;
At least one solution cabinet, for storing for making the solution that geotechnological centrifugal model is saturated;
At least one vacuum pump, for forming vacuum to described saturated case and described solution cabinet;
At least one is placed in the model casing in described saturated case, for carrying described test model, and carries described solution to described test model; When described test model is saturated complete after, described model casing is put into geotechnical centrifuge and is further tested;
Described saturated case comprises a casing and a gland bonnet, and described casing is provided with exhaust tube and at least one feed pipe, and described exhaust tube is connected with described vacuum pump;
It is characterized in that,
Described model casing is arranged in described saturated case, and described gland bonnet is provided with transparent watch window; Described model casing bottom is provided with the soakaway trench for delivery of liquid, the tube wall of described soakaway trench is provided with a plurality of holes, one end of described soakaway trench is connected with a water-supply-pipe of vertically placing, in described model casing, be further provided with a described test model covering on described soakaway trench, described water-supply-pipe height is greater than described test model height;
Described solution cabinet comprises cabinet and upper cover, described bottom of cabinet bulk is provided with drainpipe, described cabinet top is provided with gas outlet, and described gas outlet is connected with described vacuum pump, and described drainpipe is connected by the described feed pipe of described saturated case and the described water-supply-pipe of described model casing;
The stirrer that the described upper cover of described solution cabinet is provided with stirring motor and is connected with described stirring motor, the length of described stirrer is less than the height of described cabinet.
2. geotechnological centrifugal model saturation device according to claim 1, is characterized in that, described geotechnological centrifugal model saturation device further comprises a switch board, and described switch board is connected with described vacuum pump and described stirring motor respectively.
3. geotechnological centrifugal model saturation device according to claim 1, is characterized in that, the described cabinet arranged outside of described solution cabinet has a solution height observation device.
4. geotechnological centrifugal model saturation device according to claim 2, it is characterized in that, described geotechnological centrifugal model saturation device further comprises a solution supply tank, described solution supply tank comprises a taphole, described solution cabinet further comprises a fluid infusion mouth, and described taphole is connected with described fluid infusion mouth.
5. geotechnological centrifugal model saturation device according to claim 4, is characterized in that, the described feed pipe of fluid infusion mouth, drainpipe, gas outlet and the described saturated case of described solution cabinet is provided with solenoid valve, and described solenoid valve is all connected with described switch board.
6. geotechnological centrifugal model saturation device according to claim 1, is characterized in that, described stirrer is propeller mixer, comprises at least one group of 3 pusher propeller leaves, the rotating shaft of described stirrer and described upper cover out of plumb.
7. geotechnological centrifugal model saturation device according to claim 1, is characterized in that, described stirrer is turbine type agitator.
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| CN103713110B (en) * | 2013-12-19 | 2015-10-21 | 同济大学 | Based on the landfill yard soil slope failure centrifugal model test device of liquid gas coupling |
| CN104251790B (en) * | 2014-10-09 | 2017-12-29 | 中国地质大学（武汉） | Automatic water-filling formula ground sample saturator |
| CN104359728B (en) * | 2014-10-29 | 2016-11-09 | 河海大学 | Cohesiveless soil three axle sample saturation device and using method thereof |
| CN106290793B (en) * | 2016-08-29 | 2019-03-29 | 中国水利水电科学研究院 | The centrifugal model test method of landfill body unstability is induced for solution-air |
| CN109959541B (en) * | 2019-04-10 | 2020-11-20 | 浙江大学 | Intelligent geotechnical centrifugal model saturation device |
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| CN101738360A (en) * | 2009-10-16 | 2010-06-16 | 同济大学 | Time domain reflection unsaturated permeameter and method for measuring unsaturated permeability coefficient |
| JP2010181232A (en) * | 2009-02-04 | 2010-08-19 | Kansai Electric Power Co Inc:The | Method of preparing test sample for triaxial test |
| CN102175515A (en) * | 2011-01-26 | 2011-09-07 | 浙江大学 | Vacuum saturation device for soil engineering centrifugal model test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010181232A (en) * | 2009-02-04 | 2010-08-19 | Kansai Electric Power Co Inc:The | Method of preparing test sample for triaxial test |
| CN101738360A (en) * | 2009-10-16 | 2010-06-16 | 同济大学 | Time domain reflection unsaturated permeameter and method for measuring unsaturated permeability coefficient |
| CN102175515A (en) * | 2011-01-26 | 2011-09-07 | 浙江大学 | Vacuum saturation device for soil engineering centrifugal model test |
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