CN102680292A - Sample fabricating device for geotechnical model tests - Google Patents
Sample fabricating device for geotechnical model tests Download PDFInfo
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- CN102680292A CN102680292A CN201210132430XA CN201210132430A CN102680292A CN 102680292 A CN102680292 A CN 102680292A CN 201210132430X A CN201210132430X A CN 201210132430XA CN 201210132430 A CN201210132430 A CN 201210132430A CN 102680292 A CN102680292 A CN 102680292A
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Abstract
The invention belongs to the technical field of geotechnical model tests, and relates to a sample fabricating device for geotechnical model tests. The sample fabricating device comprises a sample fabricating box (1), a sample loading box (2) and a partition board (3), wherein the partition board (3) is nested at the bottom of the sample fabricating box (1), and the sample loading box (2) is arranged on the sample fabricating box (1). According to the sample fabricating device for geotechnical model tests, tested granular materials can fall into a designated model box in a layering mode according to a certain identical falling distance, homogeneity of samples fabricated each time in the horizontal direction and the vertical direction is guaranteed to a large extent, and the operation is simple.
Description
Technical field
The invention belongs to the geotechnical model test technical field, relate to a kind of geotechnical model test sample preparation device.
Background technology
Geotechnical model test has special advantages in geotechnical study, be convenient to the collection of test parameters, is easy to control boundary condition, offers convenience to theoretical analysis.Therefore, good geotechnical model test often plays a multiplier effect, and is the important means in the theoretical research.The specimen preparation of geotechnical model test is a very the key link; Especially repeat to prepare in the test of big volume sample at needs; The initial physical mechanical state that guarantees the prepared sample of each time is basic identical; And keep making the homogenieity of sample self at every turn, be the matter of utmost importance of guaranteeing to obtain accurate reasonable model test findings.If directly in model casing, banket, then sample receives the interference of inhomogeneous external force easily, and particle alignment is affected, and the physical and mechanical parameter that forms the soil body changes, and is difficult to obtain the sample of homogeneous.Traditional layering method for making sample adopts dry density control usually, confirm the raw-material quality of each layering sample after, the layering model casing of directly packing into is densified to target volume then.This method for making sample is easy and simple to handle, quick, but has the following defective: 1) individual layer sample starting material are inserted in the process of model casing, be difficult to guarantee its level to homogeneity; 2) in the placement in layers process,, usually cause whole sample to demonstrate topmost and satisfy sampling requirement and the too closely knit phenomenon in bottom because the bottom sample repeats to receive the influence of compaction energy in the upper sample compacting process.
Summary of the invention
The objective of the invention is to provides a kind of simple and easy effectively geotechnical model test sample preparation device for the defective that overcomes prior art; This device is the sample of various geotechnical model test research preparation homogeneous in the Geotechnical Engineering; Avoided directly to the banket nonuniformity of the sample that brings of model casing, also overcome bottom that the traditional obtained sample of compaction in layers method often has too closely knit with level to the not good enough defective of homogenieity.
For realizing above-mentioned purpose, technical scheme of the present invention is:
A kind of geotechnical model test sample preparation device comprises the sample preparation case, dress appearance case and dividing plate, and described dividing plate can be embedded in the bottom of sample preparation case, and described dress appearance case is positioned at the top of sample preparation case.
Described sample preparation case is a rectangular box, and it highly is 3～5cm.
Described dress appearance case is that the bottom surface is foursquare casing, and it highly is 3～5cm, and the width of dress appearance case is identical with the width of sample preparation case.
The bottom surface of the wallboard extend through dress appearance case of described dress appearance case both sides is formed with bayonet socket, and bayonet socket is fastened on the upper edge of sample preparation wall panel, and the height of bayonet socket is 1～1.5cm.
Be evenly distributed with uniform some punchings on the base plate of described sample preparation case, dress appearance case and dividing plate, this punching is quincuncial arrangement, and the aperture is 5～10mm, and pitch of holes is 2～3 times of apertures.
The two bottom sides of described sample preparation case is provided with draw-in groove, and it is capable that draw-in groove is L, and described diaphragm housing ring is embedded on the draw-in groove.
The both sides of described sample preparation case are respectively equipped with hoist cable, and hoist cable is the U type, its height a little more than the thickness of sample preparation case and dress appearance case with.
One end of described dividing plate is provided with handle.
The below of described dividing plate is welded with floor.
The both sides of one end of described dividing plate are respectively equipped with spacing card, spacing card make dividing plate only can unidirectional insertion draw-in groove in, when dividing plate inserted draw-in groove fully, the circular hole of dividing plate overlapped with the circular hole of sample preparation box plate fully.
The length of described sample preparation case is 2～4 times of its width.
Said sample preparation case can make particulate material freely fall along the circular hole of its base plate; The required sample of preparation test; Said dress appearance case can place the top of sample preparation case, is convenient in the sample preparation case, load the sample starting material, and said dividing plate can insert the draw-in groove of sample preparation case bottom; Can seal sample preparation box plate circular hole and be convenient to load the sample starting material, also can open circular hole the particulate material in the case is freely fallen.
The size of sample preparation case is processed the tray of uncovered according to the size of model test case, and height is advisable with 5～10cm according to the thickness of layering sample preparation.The punching of sample preparation box plate can make sample fall, the desirable 5～10mm in aperture, and isometrical circular hole is by quincunx distribution (being that adjacent two pitch-rows are from constant), pitch of holes is advisable with 2～3 times of apertures.L type draw-in groove is left in biside plate bottom on the length direction, is convenient to the insertion of dividing plate and fixing.The draw-in groove size should suit, and falls to being as the criterion along the base plate circular hole not influence particulate material, and will keep dividing plate to be close to base plate as far as possible.A hoist cable is respectively installed in the outside of two blocks of long side plates, is convenient to the lifting or the lifting of sample preparation case.
The purposes of dress appearance case is filling sample starting material in the sample preparation case, can make sample disturbed by external force equally, homogeneity and charge weight that control is banketed.Dress appearance case is the square tray wide with the sample preparation case, and height 3～5cm is advisable, and base plate cloth well format is consistent with the sample preparation case, and wherein a pair of relative wallboard stretches out the about 1cm of base plate, forms parallel bayonet socket, and bayonet socket can be stuck in sample preparation case two wallboard upper edges and slide.During sample preparation, dress soil and slidably reciprocating in dress appearance case fills up the sample starting material in the sample preparation case.
The size of dividing plate and sample preparation case are wide; Cloth well format and quantity are all identical with the sample preparation box plate, and two ends grow 5～10cm than sample preparation case, and an end grows the spacing card of the slightly wide formation of part; Make that circular hole can overlap just up and down when dividing plate inserted sample preparation case bottom draw-in groove fully.When dividing plate is outwards pulled out 1/2nd circular hole spacings, can stagger with sample preparation box plate eyelet, this moment can be to sample preparation case filler; After dividing plate pushed fully, Kong Wei aligned up and down, and particulate material can freely fall and form uniform individual layer sample.The tail end of dividing plate installs the leader additional, is convenient to holding operation, and the bottom can be welded a series of floors as required, prevents thin plate bend by pressure distortion back leakage sample.
The present invention is the device that geotechnical model test prepares sample, need all can use in the test of a large amount of samples of preparation various.The shape of sample preparation case and big I are confirmed according to the chamber of model test, are fallen into the test model case fully with the sample that guarantees the sample preparation case.This test unit is applicable to the specimen preparation of the particulate material of certain size usually, and particulate material freely falls from certain altitude, forms the homogeneous sample with certain initial stress state.During sample preparation, layering is progressively carried out and is not had other disturbing factor, even particle distribution in the gained sample, and native sample preparation has more superiority for the simulation layered ground, and may command interlayer contact stress also forms good branch aspect.
Generally speaking; This device comprises the sample preparation case, dress appearance case and dividing plate three parts, and said sample preparation case can make particulate material freely fall along the circular hole of its base plate; The sample that the preparation test is required; Said dress appearance case is used for to even, the quantitative filling particulate material of sample preparation case, and said dividing plate is used for sealing and open sample preparation box plate circular hole, is convenient to load the free-falling of particulate material and sample preparation case endoparticle material.
Because adopt technique scheme, the present invention can be used for the required specimen preparation of geotechnical model test, for geotechnical model test provides homogenieity good sample.
Beneficial effect of the present invention is:
1, apparatus of the present invention are that the specimen preparation of geotechnical model test provides a kind of device of being convenient to operate.
When 2, apparatus of the present invention are used for sample preparation, sample gravitate only in filling and the process that falls, the sample of formation vertically to upwards all having good homogenieity with level.
3, the sample making course layering of apparatus of the present invention is progressively carried out, and when being modeled to the specimen preparation of layer soil body, has convenience and sample preparation effect preferably.
Manufacture craft of the present invention is simple, and is easy to operate.
Description of drawings
Fig. 1 is that the three-dimensional axle of device is surveyed view in the embodiment of the invention.
Fig. 2 is a sample preparation case cloth hole synoptic diagram in installing in the embodiment of the invention.
Fig. 3 adorns appearance case cloth hole synoptic diagram in the device in the embodiment of the invention.
Fig. 4 is device median septum cloth hole and a floor synoptic diagram in the embodiment of the invention.
Fig. 5 is a device sample preparation case and the supporting synoptic diagram of dress appearance case in the embodiment of the invention.
Fig. 6 is embodiment of the invention median septum sealing sample preparation box plate circular hole synoptic diagram.
Fig. 7 is the open synoptic diagram of sample preparation case circular hole in the embodiment of the invention.
Numerical reference:
1 sample preparation case, 2 dress appearance casees, 3 dividing plates, 4 draw-in grooves,
5 hoist cables, 6 handles, 7 floors, 8 punchings,
11 wallboards, 21 bayonet sockets, 22 wallboards, 31 spacing cards.
Embodiment
Below in conjunction with the accompanying drawing illustrated embodiment the present invention is further described.
See also Fig. 1～7, the embodiment of the invention comprises sample preparation case 1, dress appearance case 2 and dividing plate 3.Dividing plate 3 is embedded in the bottom of sample preparation case 1, and dress appearance case 2 is positioned at the top of sample preparation case 1.
The bottom surface of the wallboard 22 extend throughs dress appearance case of dress appearance case 2 both sides is formed with bayonet socket 21, and bayonet socket 21 is fastened on wallboard 11 upper edges of sample preparation case 1, and the height of bayonet socket is 1～1.5cm.
On the base plate of sample preparation case 1, dress appearance case 2 and dividing plate 3 uniform some punchings 8 are arranged respectively evenly, this punching is quincuncial arrangement, and the aperture is 5～10mm, and pitch of holes is 2～3 times of apertures.
The two bottom sides of sample preparation case 1 is provided with draw-in groove 4, and it is capable that draw-in groove 4 is L, and dividing plate 3 is embedded on the draw-in groove 4.
The both sides of sample preparation case 1 are respectively equipped with hoist cable 5, and hoist cable 5 is the U type, its height a little more than the thickness of sample preparation case and dress appearance case with.
One end of dividing plate 3 is provided with handle 6.
The below of dividing plate 3 is welded with floor 7.
The both sides of one end of dividing plate 3 are respectively equipped with spacing card 31, spacing card 31 make dividing plate 3 only can unidirectional insertion draw-in groove 4 in, when dividing plate 3 inserted draw-in groove 4 fully, the circular hole of dividing plate 3 overlapped with the circular hole of sample preparation case 1 base plate fully.
Uncovered tray as shown in Figure 5, that dress appearance case 2 is processed for rigid plate, wherein two wallboards stretch out the about 1cm formation of base plate bayonet socket 21, are convenient to block the upper edge of sample preparation case 1 and can slide, and base plate is wide and consistent with the pattern of sample preparation case 1 base plate with sample preparation case 1.
In preferred embodiment of the present invention, floor 7 is equipped with in the bottom surface of dividing plate 3, prevents the distortion of pressurized rear curved.
During the test sample preparation, carry out according to the following step method,
The dividing plate that 1, will insert draw-in groove is earlier fully outwards pulled out a half-distance in about base plate aperture, makes the eyelet staggered positions of dividing plate and sample preparation box plate;
2, will adorn the appearance case and block sample preparation case biside plate upper edge, slowly pour sample into, make it evenly to insert the sample preparation case, and slide and adorn appearance case position and pour sample into, in the sample preparation case, fill up earth material fully to dress appearance case;
3, utilize lifting equipment that the sample preparation case is risen to predetermined altitude, the sample preparation case is placed directly over the model test case, after maintenance sample preparation case is stable, push dividing plate rapidly, sample can drop in the model casing.
The above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (10)
1. geotechnical model test sample preparation device is characterized in that: comprise sample preparation case (1), and dress appearance case (2) and dividing plate (3), described dividing plate (3) is embedded in the bottom of sample preparation case (1), and described dress appearance case (2) is positioned at the top of sample preparation case (1).
2. geotechnical model test sample preparation device according to claim 1 is characterized in that: described sample preparation case (1) is a rectangular box, and it highly is 3～5cm.
3. geotechnical model test sample preparation device according to claim 1 is characterized in that: described dress appearance case (2) is that the bottom surface is foursquare casing, and it highly is 3～5cm, and the width of dress appearance case (2) is identical with the width of sample preparation case (1); The bottom surface of wallboard (22) the extend through dress appearance case (2) of described dress appearance case (2) both sides is formed with bayonet socket (21), and bayonet socket (21) is fastened on wallboard (11) upper edge of sample preparation case (1), and the height of bayonet socket (21) is 1～1.5cm.
4. geotechnical model test sample preparation device according to claim 1; It is characterized in that: be evenly distributed with uniform some punchings (8) on the base plate of described sample preparation case (1), dress appearance case (2) and dividing plate (3); This punching is quincuncial arrangement; The aperture is 5～10mm, and pitch of holes is 2～3 times of apertures.
5. geotechnical model test sample preparation device according to claim 1 is characterized in that: the two bottom sides of described sample preparation case (1) is provided with draw-in groove (4), and it is capable that draw-in groove (4) is L, and described dividing plate (3) is embedded on the draw-in groove (4).
6. geotechnical model test sample preparation device according to claim 1 is characterized in that: the both sides of described sample preparation case (1) are respectively equipped with hoist cable (5), and hoist cable (5) is the U type, its height a little more than the thickness of sample preparation case and dress appearance case with.
7. geotechnical model test sample preparation device according to claim 1 is characterized in that: an end of described dividing plate (3) is provided with handle (6).
8. geotechnical model test sample preparation device according to claim 1 is characterized in that: the below of described dividing plate (3) is welded with floor (7).
9. geotechnical model test sample preparation device according to claim 1; It is characterized in that: the both sides of described dividing plate (3) one ends are respectively equipped with spacing card (31); When dividing plate (3) inserted draw-in groove (4) fully, the punching of dividing plate (3) overlapped with the punching of sample preparation case (1) base plate fully.
10. geotechnical model test sample preparation device according to claim 1 is characterized in that: the length of described sample preparation case (1) is 2～4 times of its width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210132430.XA CN102680292B (en) | 2012-04-28 | 2012-04-28 | Sample fabricating device for geotechnical model tests |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210132430.XA CN102680292B (en) | 2012-04-28 | 2012-04-28 | Sample fabricating device for geotechnical model tests |
Publications (2)
| Publication Number | Publication Date |
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| CN102680292A true CN102680292A (en) | 2012-09-19 |
| CN102680292B CN102680292B (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210132430.XA Expired - Fee Related CN102680292B (en) | 2012-04-28 | 2012-04-28 | Sample fabricating device for geotechnical model tests |
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Cited By (3)
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| CN105258996A (en) * | 2015-10-30 | 2016-01-20 | 华北水利水电大学 | Stratified soil simulation generation method and device |
| CN105510099A (en) * | 2016-01-13 | 2016-04-20 | 中南大学 | Heavy heterogeneous soil remodeling sample preparation device |
| CN108106904A (en) * | 2018-01-15 | 2018-06-01 | 同济大学 | Prepare device and its application of specific moisture content soil sample |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258996A (en) * | 2015-10-30 | 2016-01-20 | 华北水利水电大学 | Stratified soil simulation generation method and device |
| CN105258996B (en) * | 2015-10-30 | 2019-04-23 | 华北水利水电大学 | Laminated soil simulation-generation method and device |
| CN105510099A (en) * | 2016-01-13 | 2016-04-20 | 中南大学 | Heavy heterogeneous soil remodeling sample preparation device |
| CN105510099B (en) * | 2016-01-13 | 2019-04-12 | 中南大学 | A kind of heterogeneous manipulated soil sample preparation device of heavy type |
| CN108106904A (en) * | 2018-01-15 | 2018-06-01 | 同济大学 | Prepare device and its application of specific moisture content soil sample |
| CN108106904B (en) * | 2018-01-15 | 2020-04-14 | 同济大学 | Device for preparing soil sample with specific water content and application thereof |
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| CN102680292B (en) | 2014-05-21 |
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