CN202974742U - Tri-axial sample preparation unit for silty soil with low liquid limit - Google Patents
Tri-axial sample preparation unit for silty soil with low liquid limit Download PDFInfo
- Publication number
- CN202974742U CN202974742U CN 201220711615 CN201220711615U CN202974742U CN 202974742 U CN202974742 U CN 202974742U CN 201220711615 CN201220711615 CN 201220711615 CN 201220711615 U CN201220711615 U CN 201220711615U CN 202974742 U CN202974742 U CN 202974742U
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- sample preparation
- split cavity
- threaded rod
- low liquid
- liquid limit
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- 239000002689 soil Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000011068 loading method Methods 0.000 claims abstract description 15
- 229920001971 elastomer Polymers 0.000 claims description 17
- 230000000295 complement effect Effects 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000013138 pruning Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the technical field of tri-axial test sample preparation and discloses a tri-axial sample preparation unit for silty soil with a low liquid limit. The tri-axial sample preparation unit comprises a test sample barrel, a leveler, a vibratory unit and a loader, wherein the sample barrel comprises a base, a split mould, a split mould fixing plate, a capacity increasing barrel and a capacity increasing barrel fixing plate, wherein the leveler comprises a straight convex end head and a guide rod; the vibratory unit comprises a combined vibrating head, a screw rod, a positioning plate and an auxiliary positioning plate; the loader comprises a loading head, the screw rod, the positioning plate, the fastening plate, a second air guide and water guide hole; a gas exhaustion slot is etched in the split mould, wherein a convex slot and a concave slot are formed in the two ends of the gas exhaustion slot, respectively; the convex slot and the concave slot are communicated with a sealing strip; a sealing ring is arranged on the side wall of the loading head; a water guide channel is arranged in the screw rod; and the water guide channel is connected with the air guide and water guide hole. According to the tri-axial sample preparation unit for the silty soil with the low liquid limit, a problem in the process of preparing uniform silty soil sample is solved, the positioning and the sealing of the split mould are integrated, so that the sample dimension precision and the sealing effect are improved; and moreover, the tri-axial sample preparation unit can be matched with the existing tri-axial apparatus, so that the device investment is reduced.
Description
Technical field
The utility model relates to rock-soil mechanics triaxial test sample preparing technical field, particularly a kind of low liquid limit slity soil three axle sample preparation devices.
Background technology
Slity soil is the transitional type of boundary between sandy soil and cohesive soil, extensively distribute in China, such soil stabilization is poor, both easily washed away erosion, be easy to again liquefaction under various dynamic loadings, in the situation that current extreme weather takes place frequently, corresponding geologic hazard has a strong impact on the national economic development and the people's stable life, and therefore the research to low liquid limit slity soil is very urgent.Be limited to the restriction of test in situ, general shop experiment is the Main Means that carries out correlative study, and the sample of homogeneous is to obtain stable, reliable test figure, guarantees the necessary basis of result of study.
Summary of the invention
The purpose of this utility model is: for solving above-mentioned technical matters of the prior art, a kind of economy, low liquid limit slity soil three axle sample preparation devices reliably are provided, it can improve the homogeneity of slity soil sample, reduce human factor to the impact of sample, and the density by existing triaxial test equipment Control Assay, reduce the requirement to equipment investment.
In order to achieve the above object, the utility model adopts following technical scheme: a kind of low liquid limit slity soil three axle sample preparation devices are provided, have comprised: test specimen tube, smoother, vibrator and loader;
Described test specimen tube further comprises: base 1, split cavity 2, split cavity fixed head 3, increase-volume cylinder 14, increase-volume cylinder fixed head 15; Base 1 two ends are provided with screw thread circular groove 33, and the center is provided with round boss, and the central vertical line place of round boss and chassis side arranges the first air guide conduit pipe, and the first air guide conduit pipe exit is provided with the first air guide water-guiding hole 4; Split cavity 2 lower ends and described round boss are complementary, and split cavity 2 upper ends and increase-volume cylinder 14 lower ends are complementary; Fixed bar 12 is fixed on base 1 by screwing in screw thread circular groove 33; Split cavity fixed head 3 is equipped with through hole with increase-volume cylinder fixed head 15 two ends, fixed head pass successively fixed bar 12 and be placed on respectively split cavity with the flange of increase-volume cylinder on, and fix with nut 13; Split cavity fixed head 3 with base 1 and split cavity 2 be fixed together, increase-volume cylinder fixed head 15 is fixed together split cavity 2 and increase-volume cylinder 14;
Described smoother further comprises: a word nose head 16, guide rod 17, and both are threaded connection;
Described vibrator further comprises: associating vibrator 18, the first threaded rod 19, the first location-plate 20, the first connecting plate 21, auxiliary positioning plate 22; The first threaded rod 19 lower ends are threaded with associating vibrator 18, and the upper end is threaded with auxiliary positioning plate 22, and the first location-plate 20 and the first connecting plate 21 move freely on the first threaded rod 19;
Described loader is put into the increase-volume cylinder, further comprise: loading head 23, the second threaded rod 24, the second location-plate 25, the second connecting plate 26, the second air guide water-guiding hole 27, loading head 23 is threaded with the second threaded rod 24 lower ends, the second air guide water-guiding hole 27, the second location-plates 25 are set in the second threaded rod 24 upper ends and the second connecting plate 26 moves freely on the second threaded rod 24.
Wherein, described split cavity 2 is that the semicircle sheet metal of 180 ° forms by two central angles, its junction, one end arranges tongue 9, the other end arranges the first groove 8, tongue 9 is corresponding with the first groove 8, and tongue 9 is longer than approximately 0.5mm of the first groove 8, and the first groove 8 communicates with diameter 3mm rubber seal circle bar 10.
Wherein, described split cavity 2 centre positions, the outside are provided with suction hole 5, and the air discharge duct that some 1.5mm are wide, 1.5mm is dark is carved with in split cavity 2 inboards, and vertically air discharge duct 6 interval is 60 °, hoop air discharge duct 7 interval 15mm, vertically air discharge duct 6 and hoop air discharge duct 7 intersect at suction hole 5 places.
Wherein, described associating vibrator 18 is comprised of 20mm high elastic rubber cylindrical piece and the white steel cylindrical piece of 20mm.
Wherein, loading head 23 sidewalls of described loader arrange two seals circle 29, and embedded the first permeable stone 30, the second threaded rod 24 upper ends, lower end arrange curved groove 31, establish the second air guide conduit pipe 28 in the second threaded rod 24, and the second air guide conduit pipe 28 exits are provided with the second air guide water-guiding hole 27.
Low liquid limit slity soil three axle sample preparation devices when sample preparation, first with Rubber membrane cover on split cavity 2, by the logical vacuum of suction hole 5, rubber diaphragm and split cavity 2 inwalls are adjacent to; Put into the second permeable stone and filter paper in split cavity 2, wind desiceted soil is poured in split cavity 2 by part, first strike off with smoother at every turn, then control initial dry density to predetermined altitude with vibrator; Loading head 23 lower ends and soil layer Surface Contact are placed filter paper between the two, and the curved groove 31 of the second threaded rod 24 upper ends contacts with the ring of measuring one's own ability of three axle equipment, then by the first logical carbon dioxide of the first air guide water-guiding hole 4 of base 1, more logical air free water saturated sample; According to the secondary dry density calculate and fixed sample to predetermined altitude, then take off successively loader, increase-volume cylinder 14, base 1, the unnecessary soil of pruning is completed sample production; The sample that completes should be placed on and remove split cavity 2 on testing equipment again, the sample Secondary Disturbance that causes to eliminate the cover rubber diaphragm, the saturation testing of then directly being correlated with.
The beneficial effects of the utility model are: the utility model has solved the problem of making slity soil homogeneous sample, it is integrated split cavity location, sealing, improve specimen size precision and sealing effectiveness, and can be complementary with existing triaxial apparatus, reduce equipment investment; Control by initial dry density and secondary dry density two-stage, can specify arbitrarily within the specific limits the density of sample; Adopt rubber-steel associating vibrator effectively to improve the vibration cipher round results; In whole sample making course, sample is protected by split cavity, effectively reduces the human factor impact, and default rubber diaphragm has been eliminated the Secondary Disturbance of the processes such as cover rubber diaphragm to sample.The utility model is not only easy to use, and density control accurately, and sample is applicable to various triaxial tests without Secondary Disturbance.
Description of drawings
Fig. 1 is the front view of the low liquid limit slity soil three axle sample preparation devices of the utility model.
Fig. 2 is the front view of the utility model split cavity.
Fig. 3 is the vertical view of the utility model split cavity.
Fig. 4 is the structural representation of the utility model smoother.
Fig. 5 is the structural representation of the utility model vibrator.
accompanying drawing sign: 1-base, the 2-split cavity, 3-split cavity fixed head, 4-the first air guide water-guiding hole, the 5-suction hole, the vertical air discharge duct of 6-, 7-hoop air discharge duct, 8-the first groove, the 9-tongue, 10-rubber seal circle bar, the 11-bolt, the 12-fixed bar, the 13-nut, 14-increase-volume cylinder, 15-increase-volume cylinder fixed head, 16-one word nose head, the 17-guide rod, 18-unites vibrator, 19-the first threaded rod, 20-the first location-plate, 21-the first connecting plate, 22-auxiliary positioning plate, the 23-loading head, 24-the second threaded rod, 25-the second location-plate, 26-the second connecting plate, 27-the second air guide water-guiding hole, 28-the second air guide conduit pipe, the 29-O-ring seal, 30-the first permeable stone, the curved groove of 31-, 32-the first air guide conduit pipe, 33-screw thread circular groove.
Embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
With reference to Fig. 1-5, a kind of low liquid limit slity soil three axle sample preparation devices of the utility model comprise: test specimen tube, smoother, vibrator and loader;
Described test specimen tube further comprises: base 1, split cavity 2, split cavity fixed head 3, increase-volume cylinder 14, increase-volume cylinder fixed head 15; Base 1 two ends are provided with screw thread circular groove 33, and the center is provided with round boss, and the central vertical line place of round boss and chassis side arranges the first air guide conduit pipe, and the first air guide conduit pipe exit is provided with the first air guide water-guiding hole 4; Split cavity 2 lower ends and described round boss are complementary, and split cavity 2 upper ends and increase-volume cylinder 14 lower ends are complementary, and split cavity 2 is clamped by bolt 11; Fixed bar 12 is fixed on base 1 by screwing in screw thread circular groove 33; Split cavity fixed head 3 and increase-volume cylinder fixed head 15 are fusiformis, and there is through hole at major axis two ends, and are complementary with fixed bar 12, fixed head pass successively fixed bar 12 and be placed on split cavity and the flange of increase-volume cylinder on, and fixing with nut 13; Split cavity fixed head 3 with base 1 and split cavity 2 be fixed together, increase-volume cylinder fixed head 15 is fixed together split cavity 2 and increase-volume cylinder 14;
Described smoother further comprises: a word nose head 16, guide rod 17, and both are threaded connection;
Described vibrator further comprises: associating vibrator 18, the first threaded rod 19, the first location-plate 20, the first connecting plate 21, auxiliary positioning plate 22; The first threaded rod 19 lower ends are threaded with associating vibrator 18, and the upper end is threaded with auxiliary positioning plate 22, and the first location-plate 20 and the first connecting plate 21 move freely on the first threaded rod 19;
Described loader further comprises: loading head 23, the second threaded rod 24, the second location-plate 25, the second connecting plate 26, the second air guide water-guiding hole 27, loading head 23 is threaded with the second threaded rod 24 lower ends, the second air guide water-guiding hole 27, the second location-plates 25 are set in the second threaded rod 24 upper ends and the second connecting plate 26 moves freely on the second threaded rod 24.
Wherein, described split cavity 2 is that the semicircle sheet metal of 180 ° forms by two central angles, its junction, an end arranges tongue 9, and the other end arranges the first groove 8, tongue 9 is corresponding with the first groove 8, tongue 9 is longer than approximately 0.5mm of the first groove 8, and the first groove 8 communicates with diameter 3mm rubber seal circle bar 10, and this arranges can accurately locate split cavity 2, guarantee sealing, guarantee specimen size and shape.
Wherein, described split cavity 2 centre positions, the outside are provided with suction hole 5, the air discharge duct that some 1.5mm are wide, 1.5mm is dark is carved with in split cavity 2 inboards, vertically air discharge duct 6 interval is 60 °, hoop air discharge duct 7 interval 15mm, after being vacuumized by suction hole 5, air discharge duct can guarantee that rubber diaphragm and split cavity 2 are close together, and vertically air discharge duct 6 and hoop air discharge duct 7 intersect at suction hole 5 places.
Wherein, described associating vibrator 18 is comprised of 20mm high elastic rubber cylindrical piece and the white steel cylindrical piece of 20mm, and links together by three bolts, and wherein high elastic rubber with effective transmitting vibrations, guarantees the soil sample cipher round results.
Wherein, loading head 23 sidewalls of described loader arrange two seals circle 29, embedded the first permeable stone 30 in lower end, the second threaded rod 24 upper ends arrange curved groove 31, establish the second air guide conduit pipe 28 in the second threaded rod 24, and the second air guide conduit pipe 28 exits are provided with the curved groove 31 of the second air guide water-guiding hole 27, the second threaded rod 24 upper ends and the ring of measuring one's own ability of three axle equipment is complementary.
The utility model when sample preparation, first with Rubber membrane cover on split cavity 2, by the logical vacuum of suction hole 5, rubber diaphragm and split cavity 2 inwalls are adjacent to; Put into the second permeable stone and filter paper in split cavity 2, wind desiceted soil is poured in split cavity 2 by part, first strike off with smoother at every turn, then control initial dry density to predetermined altitude with vibrator; Loading head 23 lower ends and soil layer Surface Contact are placed filter paper between the two, and the curved groove 31 of the second threaded rod 24 upper ends contacts with the ring of measuring one's own ability of three axle equipment, then by the first logical carbon dioxide of the first air guide water-guiding hole 4 of base 1, more logical air free water saturated sample; According to the secondary dry density calculate and fixed sample to predetermined altitude, then take off successively loader, increase-volume cylinder 14, base 1, the unnecessary soil of pruning is completed sample production; The sample that completes should be placed on and remove split cavity 2 on testing equipment again, the sample Secondary Disturbance that causes to eliminate the cover rubber diaphragm, the saturation testing of then directly being correlated with.
Above content is the further description of the present invention being done in conjunction with optimal technical scheme, can not assert that the concrete enforcement of invention only limits to these explanations.Concerning the general technical staff of the technical field of the invention, under the prerequisite that does not break away from design of the present invention, can also make simple deduction and replacement, all should be considered as protection scope of the present invention.
Claims (6)
1. low liquid limit slity soil three axle sample preparation devices, is characterized in that, described low liquid limit slity soil three axle sample preparation devices comprise: test specimen tube, smoother, vibrator and loader;
Described test specimen tube further comprises: base (1), split cavity (2), split cavity fixed head (3), increase-volume cylinder (14), increase-volume cylinder fixed head (15); Base (1) two ends are provided with screw thread circular groove (33), and the center is provided with round boss, and the central vertical line place of round boss and chassis side arranges the first conduit pipe (32), and the first conduit pipe (32) exit is provided with the first air guide water-guiding hole (4); Split cavity (2) lower end and described round boss are complementary, and split cavity (2) upper end and increase-volume cylinder (14) lower end are complementary; Fixed bar (12) is fixed on base (1) by screwing in screw thread circular groove (33); Split cavity fixed head (3) is equipped with through hole with increase-volume cylinder fixed head (15) two ends, fixed head pass successively fixed bar (12) and be placed on respectively split cavity with the flange of increase-volume cylinder on, and fix with nut (13).
2. low liquid limit slity soil three axle sample preparation devices according to claim 1, is characterized in that, described smoother further comprises: a word nose head (16), guide rod (17), and both are threaded connection;
Described vibrator further comprises: associating vibrator (18), the first threaded rod (19), the first location-plate (20), the first connecting plate (21), auxiliary positioning plate (22); The first threaded rod (19) lower end is threaded with associating vibrator (18), and the upper end is threaded with auxiliary positioning plate (22), and the first location-plate (20) moves freely on the first threaded rod (19) with the first connecting plate (21);
Described loader is put into the increase-volume cylinder, further comprise: loading head (23), the second threaded rod (24), the second location-plate (25), the second connecting plate (26), the second air guide water-guiding hole (27), loading head (23) is threaded with the second threaded rod (24) lower end, the second threaded rod (24) upper end arranges the second air guide water-guiding hole (27), and the second location-plate (25) moves freely on the second threaded rod (24) with the second connecting plate (26).
3. low liquid limit slity soil three axle sample preparation devices according to claim 1, it is characterized in that, described split cavity (2) is that the semicircle sheet metal of 180 ° forms by two central angles, its junction, one end arranges tongue (9), and the other end arranges the first groove (8), and tongue (9) is corresponding with the first groove (8), tongue (9) is longer than the first groove (8) 0.5mm, and the first groove (8) communicates with diameter 3mm rubber seal circle bar (10).
4. low liquid limit slity soil three axle sample preparation devices according to claim 1, it is characterized in that, centre position, described split cavity (2) outside is provided with suction hole (5), the air discharge duct that some 1.5mm are wide, 1.5mm is dark is carved with in split cavity (2) inboard, vertically air discharge duct (6) interval is 60 °, hoop air discharge duct (7) interval 15mm, vertically air discharge duct (6) is located to intersect at suction hole (5) with hoop air discharge duct (7).
5. low liquid limit slity soil three axle sample preparation devices according to claim 1, is characterized in that, described associating vibrator (18) is comprised of 20mm high elastic rubber cylindrical piece and the white steel cylindrical piece of 20mm.
6. low liquid limit slity soil three axle sample preparation devices according to claim 1, it is characterized in that, the loading head of described loader (23) sidewall arranges two seals circle (29), embedded the first permeable stone in lower end (30), the second threaded rod (24) upper end arranges curved groove (31), establish the second air guide conduit pipe (28) in the second threaded rod (24), and the second air guide conduit pipe (28) exit is provided with the second air guide water-guiding hole (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220711615 CN202974742U (en) | 2012-12-21 | 2012-12-21 | Tri-axial sample preparation unit for silty soil with low liquid limit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220711615 CN202974742U (en) | 2012-12-21 | 2012-12-21 | Tri-axial sample preparation unit for silty soil with low liquid limit |
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| Publication Number | Publication Date |
|---|---|
| CN202974742U true CN202974742U (en) | 2013-06-05 |
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| CN 201220711615 Expired - Fee Related CN202974742U (en) | 2012-12-21 | 2012-12-21 | Tri-axial sample preparation unit for silty soil with low liquid limit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048174A (en) * | 2012-12-21 | 2013-04-17 | 大连理工大学 | Triaxial sample preparation device for low-liquid limit silty soil and sample preparation method |
| CN103776676A (en) * | 2014-01-23 | 2014-05-07 | 长沙理工大学 | Geotechnical triaxial test specimen split mold and specimen manufacturing method |
| CN106769320A (en) * | 2017-01-10 | 2017-05-31 | 南京工程学院 | A kind of liquid plastic combine tester sample cup for liquid and its method for making sample |
| CN107966336A (en) * | 2017-11-06 | 2018-04-27 | 华侨大学 | A kind of grouting and reinforcing soil body pressure-bearing test mould and its test method |
| CN108896372A (en) * | 2018-07-24 | 2018-11-27 | 武汉科技大学 | A kind of CT scan sample preparation device |
| CN110987561A (en) * | 2019-12-13 | 2020-04-10 | 中国海洋大学 | Sand sample preparation device and method |
-
2012
- 2012-12-21 CN CN 201220711615 patent/CN202974742U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048174A (en) * | 2012-12-21 | 2013-04-17 | 大连理工大学 | Triaxial sample preparation device for low-liquid limit silty soil and sample preparation method |
| CN103048174B (en) * | 2012-12-21 | 2015-08-12 | 大连理工大学 | A kind of low liquid limit slity soil three axle sample preparation device |
| CN103776676A (en) * | 2014-01-23 | 2014-05-07 | 长沙理工大学 | Geotechnical triaxial test specimen split mold and specimen manufacturing method |
| CN103776676B (en) * | 2014-01-23 | 2016-04-27 | 长沙理工大学 | Geotechnical triaxial test specimen split mold and specimen manufacturing method |
| CN106769320A (en) * | 2017-01-10 | 2017-05-31 | 南京工程学院 | A kind of liquid plastic combine tester sample cup for liquid and its method for making sample |
| CN107966336A (en) * | 2017-11-06 | 2018-04-27 | 华侨大学 | A kind of grouting and reinforcing soil body pressure-bearing test mould and its test method |
| CN107966336B (en) * | 2017-11-06 | 2023-10-20 | 华侨大学 | Grouting reinforcement soil body bearing test mold and test method thereof |
| CN108896372A (en) * | 2018-07-24 | 2018-11-27 | 武汉科技大学 | A kind of CT scan sample preparation device |
| CN110987561A (en) * | 2019-12-13 | 2020-04-10 | 中国海洋大学 | Sand sample preparation device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20151221 |
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| EXPY | Termination of patent right or utility model |