CN102706711A - Geotechnical-engineering centrifugal model saturation device - Google Patents
Geotechnical-engineering centrifugal model saturation device Download PDFInfo
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- CN102706711A CN102706711A CN2012101948360A CN201210194836A CN102706711A CN 102706711 A CN102706711 A CN 102706711A CN 2012101948360 A CN2012101948360 A CN 2012101948360A CN 201210194836 A CN201210194836 A CN 201210194836A CN 102706711 A CN102706711 A CN 102706711A
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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 of model that is used for geotechnological centrifugal test is used and carry out saturated device.
Background technology
In many engineering sciences, usually need go to disclose and analyze the essence and the mechanism of phenomenon with the physical model of little guide, with checking and solution engineering problem.For example, in Geotechnical Engineering, the gravity stress of soil is dominant usually, and the mechanical characteristic and the hydraulic performance of soil change with stress level.Utilize the test of little guide centrifugal model; Can adopt and the prototype identical materials, in the high acceleration field that centrifugal testing machine forms, reach the stress level identical, thereby model is equated with the ess-strain of prototype with prototype; Be out of shape similar; Failure mechanism is identical, can reproduce the prototype characteristic, for analytical approachs such as theoretical and numerical value provide true and reliable parameter foundation.
When utilizing geotechnical centrifuge research to invade ground situation of change under earthquake conditions such as dam body under the profit line about liquefaction of sand or water conservancy dam; Need utilize the higher dynamic viscosity coefficient of glutinousness liquid to simulate the stressed conduction situation of water in the prototype, therefore just need use glutinousness liquid to carry out saturated to the test model that is used for geotechnological centrifugal test.
But at present about the Design of device of the relevant treatment of the test model that is used for geotechnological centrifugal test and few; Particularly when carrying out the test model that is used for geotechnological centrifugal test when saturated; Existing method mainly is on geotechnological centrifugal model, to spray liquid by the mode that sprays; Permeate by liquid and to make geotechnological centrifugal model reach capacity; But this saturation process from outside to inside can not better controlled for the saturation degree of geotechnological centrifugal model, and 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 several hours even a couple of days, for using viscous liquid that model is carried out when saturated; 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 is used at geotechnological centrifugal model saturation history sealing test model, thereby around said test model, forms vacuum,
At least one solution cabinet is used to store and is used for making the saturated solution of geotechnological centrifugal model,
At least one vacuum pump is used for said saturated case and said solution cabinet are formed vacuum,
The model casing that at least one places in the said saturated case is used to carry said test model, and carries said solution to said test model,
Said saturated case comprises a casing and a gland bonnet, and said casing is provided with exhaust tube and at least one feed pipe, and said exhaust tube links to each other with said vacuum pump,
Said model casing is arranged in the said saturated case, and said gland bonnet is provided with transparent watch window; Said model casing bottom is provided with the soakaway trench that is used to carry liquid; The tube wall of said soakaway trench is provided with a plurality of holes; One end of said soakaway trench is connected with a water-supply-pipe of vertically placing; Further be provided with a said test model that covers on the said soakaway trench in the said model casing, said water-supply-pipe height is greater than said test model height;
Said solution cabinet comprises cabinet and loam cake; Said bottom of cabinet bulk is provided with drainpipe; Said cabinet top is provided with gas outlet, and said gas outlet is connected with said vacuum pump, and said drainpipe is connected with the said water-supply-pipe of said model casing through the said feed pipe of said saturated case;
The stirrer that the said loam cake of said solution cabinet is provided with stirring motor and links to each other with said stirring motor, the length of said stirrer is less than the height of said cabinet.
Preferably, said geotechnological centrifugal model saturation device further comprises a switch board, and said switch board is connected with said vacuum pump and said stirring motor respectively.
Preferably, the said cabinet arranged outside of said solution cabinet has a solution height observation device.
Preferably, said geotechnological centrifugal model saturation device further comprises a solution supply jar, and said solution supply jar comprises a taphole, and said solution cabinet further comprises a fluid infusion mouth, and said taphole is connected with said fluid infusion mouth.
Preferably, the said feed pipe of fluid infusion mouth, drainpipe, gas outlet and the said saturated case of said solution cabinet is provided with solenoid valve, and said solenoid valve all is connected with said switch board.
Preferably, said stirrer is a propeller mixer, comprises at least one group of 3 pusher propeller leaves, the rotating shaft of said stirrer and said loam cake out of plumb.
Preferably, said stirrer is a turbine type agitator.
Geotechnological centrifugal model saturation device provided by the present invention; Through being used for making saturated solution of geotechnological centrifugal model and test model all place certain vacuum tightness environment; Utilize the gravity or the vacuum pressure reduction of solution self; Accomplish saturation history through the soakaway trench under the said test model, can improve said test model saturation degree through saturation history from the inside to the outside like this.In saturation history, through stirrer solution is stirred, can in long-time saturation history, keep the mixture homogeneity of solution like this, can there be the air of organizing in solution to discharge simultaneously, promote the quality of solution.
Description of drawings
Following accompanying drawing only is intended to the present invention is done schematic illustration and explanation, not delimit the scope of the invention.Wherein,
Fig. 1 is the structural representation according to 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 geotechnological centrifugal model saturation device shown in Figure 1;
Fig. 3 is the structural representation of the saturated case of geotechnological centrifugal model saturation device shown in Figure 1;
Fig. 4 is the structural representation of the model casing of geotechnological centrifugal model saturation device shown in Figure 1.
Embodiment
To understand in order technical characterictic of the present invention, purpose and effect being had more clearly, to contrast description of drawings embodiment of the present invention at present.Wherein, identical parts adopt identical label.
Specify structure and principle thereof with reference to the accompanying drawings according to a kind of geotechnological centrifugal model saturation device of the present invention.
Fig. 1 is the structural representation according to 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 geotechnological centrifugal model saturation device shown in Figure 1; Fig. 3 is the structural representation of the saturated case of geotechnological centrifugal model saturation device shown in Figure 1; Fig. 4 is the structural representation of the model casing of geotechnological centrifugal model saturation device shown in Figure 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 used for geotechnological centrifugal model saturation history sealing test model 5, thereby around said test model 5, forms vacuum,
At least one solution cabinet 2 is used to store and is used for making the saturated solution of geotechnological centrifugal model,
At least one vacuum pump 3 is used for said saturated case 1 and said solution cabinet 2 are formed vacuum,
The model casing 4 that at least one places in the said saturated case 1 is used to carry said test model 5, and carries said solution to said test model 5,
Said saturated case 1 comprises a casing 11 and a gland bonnet 12, and said casing 11 is provided with exhaust tube 111 and at least one feed pipe 112, and said exhaust tube 111 links to each other with said vacuum pump 3,
Said model casing 4 is arranged in the said saturated case 1; Said gland bonnet 12 is provided with transparent watch window 121; Said model casing 4 bottoms are provided with and are used to carry liquid soakaway trench 41, and the tube wall of said soakaway trench 41 is provided with a plurality of holes, and an end of said soakaway trench 41 is connected with a water-supply-pipe 42 of vertically placing; Further be provided with a said test model 5 that covers on the said soakaway trench 41 in the said model casing 4, said water-supply-pipe 42 height are greater than said test model 5 height.
Said solution cabinet 2 comprises cabinet 21 and loam cake 22; Said cabinet 21 bottoms are provided with drainpipe 211; Said cabinet 21 tops are provided with gas outlet 212; Said gas outlet 212 is connected with said vacuum pump 3, and said drainpipe 211 is connected with the said water-supply-pipe 42 of said model casing 4 through the said feed pipe 122 of said saturated case 1.
The stirrer 222 that the said loam cake 22 of said solution cabinet 2 is provided with stirring motor 221 and links to each other with said stirring motor 221, the length of said stirrer 222 is less than the height of said cabinet 21.
When needs carry out when saturated said test model 5; Can put in said model casing 4 bottoms and be curve shape according to said test model 5 shapes, the big said soakaway trench 41 of young pathbreaker earlier; Snakelike such as spirality, level; Perhaps put to the snakelike of height fluctuating arranged, can increase the contact area of said soakaway trench 41 and said test model 5 like this, ensure the solution quantity delivered; Can on said soakaway trench 41, cover then said test model 5 is set; The water-supply-pipe 42 of the vertical placement that is connected with an end of said soakaway trench 41 is higher than the height of said test model 5; So not when inserting the water source; Can not influence the said test model 5 that has placed, said water-supply-pipe 42 is lower than the height of said model casing 4, can not influence the sealing to said model casing 4 like this.
Said soakaway trench 41 can be a pipe; Described hole setting on said soakaway trench 41 tube walls can be axially spaced-apart 1cm, and spaced radial 120 degree evenly distribute, and also can be axially spaced-apart 1.5cm; Spaced radial 60 degree evenly distribute, and the described hole diameter is 0.2-3mm.Can ensure that so said soakaway trench 41 oozes out solution uniformly in said test model 5 inside, thereby ensure effective saturation degree of said test model 5.
After in said model casing 4, setting said test model 5, can said model casing 4 be placed as in the said casing 11, use flexible pipe to connect said water-supply-pipe 42 and said feed pipe 112.Use said gland bonnet 12 to cover said casing 11 then, said exhaust tube 111 is linked to each other with said vacuum pump 3.Said gland bonnet 12 can use organic glass that transparent watch window 121 is set, and can observe the degree of saturation of said test model 5 so at any time.
Said solution cabinet 2 is placed on the position that is higher than said saturated case 1, uses pipeline that said feed pipe 112 is connected with said drainpipe 211, simultaneously, said gas outlet 212 is connected with said vacuum pump 3.
When needs use viscosity solution geotechnological centrifugal model is carried out when saturated; Viscosity solution can use methylcellulose to allocate, the methocel solution that has certain viscosity according to the needs allotment of test, when preparing solution well after; Pack into the said cabinet 21 of said solution cabinet 2; Cover said loam cake 22 with said solution cabinet 2 good seals, the stirrer 222 that said loam cake 22 is provided with stirring motor 221 and links to each other with said stirring motor 221, the length of said stirrer 222 is less than the height of said cabinet 21; After covering said loam cake 22, said stirrer 222 just can immerse in the solution like this.
After connecting said saturated case 1, said solution cabinet 2 and said vacuum pump 3; Open said vacuum pump 3; Can in said saturated case 1 and said solution cabinet 2, form vacuum; Because the position of said solution cabinet 2 is higher than the position of said saturated case 1; When said saturated case 1 was identical with vacuum tightness in the said solution cabinet 2, solution just can flow into said water-supply-pipe 42 through pipeline under the self gravitation effect, and it is saturated to said test model 5 external penetration to overcome the seepage force of said test model 5 from the inside of said test model 5 through the hole on the said soakaway trench 41.
Certainly, also can regulate the vacuum tightness in said saturated case 1 and the said solution cabinet 2, make said solution cabinet 2 and said saturated case 1 form pressure reduction, adjust the saturation rate of solution said test model 5.
In saturation history; Through said stirring motor 221 said stirrer 222 is stirred in solution; So just can in long-time saturation history, keep the mixture homogeneity of solution, can have the air of organizing in solution to discharge simultaneously, promote the quality of solution.
After the said test model 5 saturated completion, just can recover the atmospheric pressure of said saturated case 1 and said solution cabinet 2, open said gland bonnet 12, said model casing 4 is further tested from putting into geotechnical centrifuge after said saturated case 1 takes out.
In a preferred embodiment, said geotechnological centrifugal model saturation device further comprises a switch board 6, and said switch board 6 is connected with said vacuum pump 3 and said stirring motor 221 respectively.Like this can be through said vacuum pump 3 of said switch board centralized control and said stirring motor 221.
In a preferred embodiment, said cabinet 21 arranged outside of said solution cabinet 2 have a solution height observation device 213.Said solution height observation device 213 can be two ends respectively with the said cabinet sealing hollow plexi-glass tubular that two ends are connected about in the of 21, so just can be at any time observe the capacity situation of the solution in the said solution cabinet 2 from said solution height observation device 213.
In a preferred embodiment; Said geotechnological centrifugal model saturation device further comprises a solution supply jar 7; Said solution supply jar 7 comprises a taphole, and said solution cabinet 2 further comprises a fluid infusion mouth 23, and said taphole is connected with said fluid infusion mouth 23.When said test model 5 needed solution are many, can in said solution supply jar 7, place solution, in saturation history, be said solution cabinet 2 make-up solution at any time easily.
In a preferred embodiment, the said feed pipe 112 of the fluid infusion mouth 23 of said solution cabinet 2, drainpipe 211, gas outlet 212 and said saturated case 1 is provided with solenoid valve 8, and said solenoid valve 8 all is connected with said switch board 6.So just can concentrate the said saturated case 1 of adjustment and the vacuum tightness of said solution cabinet 2, the additional degree of solution of said solution cabinet 2 and the flow velocity that said solution gets into said saturated case 1 through said switch board 6 at any time.
In a preferred embodiment, said stirrer 222 is a propeller mixer, comprises at least one group of 3 pusher propeller leaves, the rotating shaft of said stirrer 222 and said loam cake 22 out of plumb.The rotating shaft of said like this stirrer 222 is exactly oblique insertion solution, when solution is stirred, just can make the closed circuit of flow asymmetric, can increase turbulence, and it is more abundant that solution is mixed.
In a preferred embodiment, said stirrer 222 is a turbine type agitator.Can cause the Radial Flow of height turbulence so when rotated, it is more abundant that solution is mixed.
Geotechnological centrifugal model saturation device provided by the present invention; Through solution and test model are all placed certain vacuum tightness environment; Utilize the gravity or the vacuum pressure reduction of solution self; Accomplish saturation history through the soakaway trench under the said test model, can improve said test model saturation degree through saturation history from the inside to the outside like this.In saturation history, through stirrer solution is stirred, can in long-time saturation history, keep the mixture homogeneity of solution like this, can there be the air of organizing in solution to discharge simultaneously, promote the quality of solution.
Describing according to the mode of a plurality of embodiment though it will be appreciated by those skilled in the art that the present invention, is not that each embodiment only comprises an independently technical scheme.Narration like this only is for the sake of clarity in the instructions; Those skilled in the art should do instructions as a wholely to understand, and regard technical scheme related among each embodiment as the mode that can be combined into different embodiment each other understand protection scope of the present invention.
The above is merely the schematic embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, revises and combines the equivalent variations of under the prerequisite that does not break away from design of the present invention and principle, being done, and all should belong to the scope that the present invention protects.
Claims (7)
1. geotechnological centrifugal model saturation device, it comprises,
A saturated case is used at geotechnological centrifugal model saturation history sealing test model, thereby around said test model, forms vacuum;
At least one solution cabinet is used to store and is used for making the saturated solution of geotechnological centrifugal model;
At least one vacuum pump is used for said saturated case and said solution cabinet are formed vacuum;
The model casing that at least one places in the said saturated case is used to carry said test model, and carries said solution to said test model;
Said saturated case comprises a casing and a gland bonnet, and said casing is provided with exhaust tube and at least one feed pipe, and said exhaust tube links to each other with said vacuum pump;
It is characterized in that,
Said model casing is arranged in the said saturated case, and said gland bonnet is provided with transparent watch window; Said model casing bottom is provided with the soakaway trench that is used to carry liquid; The tube wall of said soakaway trench is provided with a plurality of holes; One end of said soakaway trench is connected with a water-supply-pipe of vertically placing; Further be provided with a said test model that covers on the said soakaway trench in the said model casing, said water-supply-pipe height is greater than said test model height;
Said solution cabinet comprises cabinet and loam cake; Said bottom of cabinet bulk is provided with drainpipe; Said cabinet top is provided with gas outlet, and said gas outlet is connected with said vacuum pump, and said drainpipe is connected with the said water-supply-pipe of said model casing through the said feed pipe of said saturated case;
The stirrer that the said loam cake of said solution cabinet is provided with stirring motor and links to each other with said stirring motor, the length of said stirrer is less than the height of said cabinet.
2. geotechnological centrifugal model saturation device according to claim 1 is characterized in that, said geotechnological centrifugal model saturation device further comprises a switch board, and said switch board is connected with said vacuum pump and said stirring motor respectively.
3. geotechnological centrifugal model saturation device according to claim 1 is characterized in that, the said cabinet arranged outside of said solution cabinet has a solution height observation device.
4. geotechnological centrifugal model saturation device according to claim 2; It is characterized in that; Said geotechnological centrifugal model saturation device further comprises a solution supply jar; Said solution supply jar comprises a taphole, and said solution cabinet further comprises a fluid infusion mouth, and said taphole is connected with said fluid infusion mouth.
5. geotechnological centrifugal model saturation device according to claim 4 is characterized in that the said feed pipe of fluid infusion mouth, drainpipe, gas outlet and the said saturated case of said solution cabinet is provided with solenoid valve, and said solenoid valve all is connected with said switch board.
6. geotechnological centrifugal model saturation device according to claim 1 is characterized in that said stirrer is a propeller mixer, comprises at least one group of 3 pusher propeller leaves, the rotating shaft of said stirrer and said loam cake out of plumb.
7. geotechnological centrifugal model saturation device according to claim 1 is characterized in that said stirrer is a turbine type agitator.
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Cited By (5)
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| CN103713110A (en) * | 2013-12-19 | 2014-04-09 | 同济大学 | Landfill soil slope unstability centrifugal model testing device based on liquid-gas coupling effect |
| CN104251790A (en) * | 2014-10-09 | 2014-12-31 | 中国地质大学（武汉） | Self-water injection type rock and soil sample saturator |
| CN104359728A (en) * | 2014-10-29 | 2015-02-18 | 河海大学 | Cohesiveless soil three-axis sample saturation device and using method thereof |
| CN106290793A (en) * | 2016-08-29 | 2017-01-04 | 中国水利水电科学研究院 | Centrifugal model test method for gas-liquid induction landfill body unstability |
| CN109959541A (en) * | 2019-04-10 | 2019-07-02 | 浙江大学 | A kind of intelligence geo- textile technique saturation device |
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| JP2010181232A (en) * | 2009-02-04 | 2010-08-19 | Kansai Electric Power Co Inc:The | Method of preparing test sample for triaxial test |
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| JP2010181232A (en) * | 2009-02-04 | 2010-08-19 | Kansai Electric Power Co Inc:The | Method of preparing test sample for triaxial test |
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| CN102175515A (en) * | 2011-01-26 | 2011-09-07 | 浙江大学 | Vacuum saturation device for soil engineering centrifugal model test |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713110A (en) * | 2013-12-19 | 2014-04-09 | 同济大学 | Landfill soil slope unstability centrifugal model testing device based on liquid-gas coupling effect |
| 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 |
| CN104251790A (en) * | 2014-10-09 | 2014-12-31 | 中国地质大学（武汉） | Self-water injection type rock and soil sample saturator |
| CN104251790B (en) * | 2014-10-09 | 2017-12-29 | 中国地质大学（武汉） | Automatic water-filling formula ground sample saturator |
| CN104359728A (en) * | 2014-10-29 | 2015-02-18 | 河海大学 | Cohesiveless soil three-axis sample saturation device and using method thereof |
| CN106290793A (en) * | 2016-08-29 | 2017-01-04 | 中国水利水电科学研究院 | Centrifugal model test method for gas-liquid induction landfill body unstability |
| 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 |
| CN109959541A (en) * | 2019-04-10 | 2019-07-02 | 浙江大学 | A kind of intelligence geo- textile technique saturation device |
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