CN105181404B - Frozen clay hollow cylinder sample sample preparation device - Google Patents
Frozen clay hollow cylinder sample sample preparation device Download PDFInfo
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- CN105181404B CN105181404B CN201510399623.5A CN201510399623A CN105181404B CN 105181404 B CN105181404 B CN 105181404B CN 201510399623 A CN201510399623 A CN 201510399623A CN 105181404 B CN105181404 B CN 105181404B
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Abstract
The present invention relates to a kind of frozen clay hollow cylinder sample sample preparation device, its architectural feature is that the upper push-down head of dentation is stuck between docking inner cylinder and outer barrel, upper and lower side, outer barrel positioned at hollow cylinder sample are fixed using lock ring circle, it is boosting-rod directly over toothed seaming chuck, it connects with the pressure head of pressure-like machine, is responsible for pressure Transmit evenly to toothed seaming chuck.The middle part of outer barrel is the lock ring circle with ear, is connected with a stainless steel stent.Its method for making sample is first to fix whole device, and the wet soil to stir is layered and imported in sample preparation cylinder, two compacting is carried out to the soil body using pressure-like machine.The present invention is not only easy to operate, save the time, principle is simple, and it is uniform that dry density, porous media can be made, the saturation hollow cylinder clay sample that initial damage is smaller, upper and lower surface is all dentation, technical support is provided for further mechanical property of the research frozen clay under the conditions of complicated stress environment.
Description
Technical field
The present invention relates to a kind of frozen clay hollow cylinder sample sample preparation device.Using this device, saturated clay can be prepared
Hollow sample, technical support is provided for further mechanical property of the research frozen clay under the conditions of complicated stress environment.
Background technology
Hollow cylinder experiment is to study the ideal supporting method of native mechanical property under the conditions of complicated stress environment.It is empty
The experiment of heart cylinder is always to restrict because of the limitation of be stressed room temperature control technique and hollow cylinder frozen soil sample sample making technology
We further recognize the bottleneck of frozen soil mechanics property.Also there is no development to pass through hollow cylinder in frozen soil mechanics research field at present
The work of the mechanical property of experimental study frozen soil.In non-cyopedology, often soil sample layering loading is held in film cylinder, and be layered and hit
In fact to certain density, back-pressure saturation then is carried out to hollow earth pillar, reaches the saturation moisture content under a certain density.Due to sand
Soil permeability is larger, and back-pressure saturation is relatively easy to, so this method for making sample is feasible.It is but more fine and closely woven for particle
Clay for, because its permeability is very poor, so back-pressure saturation is not easy very much, soil sample is carried out under high pressure effect anti-
Saturation is pressed, moisture can not be evenly distributed completely in soil sample, can not by the deformation of generation differential frost heave after soil sample is freezed
Carry out mechanical test.Therefore, we have developed frozen soil experiment with hollow cylinder apparatus to study the mechanics of frozen soil under the conditions of complicated stress environment
Property, and it is that smooth frozen soil hollow cylinder of carrying out is tested to prepare hollow cylinder sample, so as to recognize the key of frozen soil mechanics property.
The content of the invention
In view of above-mentioned, it is an object of the invention to provide a kind of sample preparation dress that can be used for preparing clay hollow cylinder sample
Put.Using the present apparatus, the clay sample dry density and moisture content made are uniform, the demoulding is easily and simple to operate, and can be with experiment
Machine loading system close fit, the mechanical property for frozen soil under the conditions of development complicated stress environment in next step establish good base
Plinth.
The purpose of the present invention is realized by following measures：
A kind of clay hollow cylinder sample sample preparation device, it is by boosting-rod, the valve outer barrel of stainless steel three, inner cylinder cap, lock ring
Circle, toothed seaming chuck, fixed screw, pumping board, the valve inner cylinder of stainless steel two, the lock ring circle with hangers, hollow cylinder clay sample
, toothed push-down head, support bracket fastened bolt, support, lower bottom base form.Boosting-rod section is in " ∏ " shape, is built-in with not
Become rusty the valve outer barrel of steel three, and be cased with stainless steel in the valve outer barrel of stainless steel three passes through toothed upper pressure to valve inner cylinder, the valve inner cylinder of stainless steel two
Head arrives at toothed push-down head, and inner cylinder cap is placed in the top of the valve inner cylinder of stainless steel two, one is embedded among the valve inner cylinder of stainless steel two
It is individual it is outer be pumping board that band bends in rectangle, toothed seaming chuck and toothed push-down head are separated, the valve outer barrel of stainless steel three and
It is hollow cylinder clay sample between the valve inner cylinder of stainless steel two, the top of the valve outer barrel of stainless steel three sets lock ring circle, with fixed spiral shell
Silk fastening, middle part set the lock ring circle with hangers, are connected with a stainless steel stent, are fastened with support bracket fastened bolt, under
Base contacts with the bottom of sample preparation device.
Advantages of the present invention and caused beneficial effect are：
1st, inner cylinder of the invention is docked by two split pumping boards, in the demoulding, pumping board is extracted, can not only be reduced
The caused extruding force between inner membrance cylinder and soil sample in pressure-like, it is more laborsaving, conveniently to make to slough sample inner membrance, and can ensure
The smoothness of sample inwall；
2nd, outer barrel of the invention is docked by three valve body of stainless steel, and is fixed by lock ring circle.Not only ensure prepared try
The integrality of sample, and can be more prone to the sample demoulding；
4th, the lock ring circle in the middle part of the valve outer barrel of stainless steel three has a hangers, not only can with the valve outer barrel of lock ring stainless steel three,
And connect with support, using this hangers as axle, sample preparation cylinder is overturn, can be loaded at sample preparation cylinder two, ensure the uniformity of sample,
It is laborsaving, conveniently；
4th, hollow cylinder sample occupy the valve outer barrel of stainless steel three and stainless steel to valve inner cylinder, toothed seaming chuck with it is toothed
Between push-down head.When carrying out torsion shear test, keep hollow sample not departed from base, dry density, moisture content point can be made
Cloth is uniform, the saturation hollow cylinder clay sample that initial damage is smaller, upper and lower surface is all dentation；
5th, this sample preparation device is simple in construction, easy to operate, and the sample demoulding is light and will not destroy the external structure of sample.
Brief description of the drawings
Fig. 1 is the frozen clay hollow cylinder sample sample preparation device profilograph of the present invention；
Fig. 2 is the frozen clay hollow cylinder sample sample preparation device sectional side view of the present invention；
Fig. 3 is the frozen clay hollow cylinder sample sample preparation device top view of the present invention；
Fig. 4 is the frozen clay hollow cylinder sample sample preparation device base of the present invention；
Fig. 5 is pressure head structure figure above and below the frozen clay hollow cylinder sample sample preparation device of the present invention.
Embodiment
Below, with reference to accompanying drawing, the technical scheme of invention is described in further detail again by embodiment：
A kind of clay hollow cylinder sample sample preparation device, it is by boosting-rod 1, the valve of stainless steel three as shown in Fig. 1-Fig. 5
Outer barrel 2, inner cylinder cap 3, lock ring circle 4, toothed seaming chuck 5, fixed screw 6, pumping board 7, the valve inner cylinder 8 of stainless steel two, band hangers
Lock ring circle 9, hollow cylinder clay sample 10, toothed push-down head 11, support bracket fastened bolt 12, stainless steel stent
13rd, lower bottom base 14 is formed.Boosting-rod 1 connects with the cylindrical crimp of testing machine, and it is on toothed by pressure transmission that it, which is acted on,
Pressure head 5, toothed seaming chuck 5 are held in the top of hollow cylinder clay sample 10, and toothed push-down head 11 is placed in hollow cylinder
10 bottom of clay sample.The main function of toothed seaming chuck 5 and toothed push-down head 11 has at 2 points, first, by boosting-rod
1 pressure is uniformly distributed the top for being transmitted to sample, second, in order to which the hollow cylinder clay examination that upper bottom surface is all dentation is made
Sample.The valve outer barrel 2 of stainless steel three is made up of the circular arc stainless steel metal piece that certain thickness three valves central angle is 120 °.Inner cylinder cap
3 be a circular metal cover, and diameter is equal with the diameter of the valve inner cylinder of stainless steel two, primarily to by wet soil when preventing sample preparation
It is spilled into inner cylinder.The top and the bottom lock ring circle 4 of three valve outer barrel of stainless steel 2 is annular, and joint is threaded type circular hole, passes through screw 6
The valve outer barrel 2 of stainless steel three is fixed together, prevents outer barrel from loosening.The valve inner cylinder 8 of stainless steel two by two semicircular stainless steel cylinder with
One stainless steel pumping board 7 docking form inner cylinder body, the main function of pumping board 7 be reduce pressure-like during between inner membrance cylinder and soil sample
Caused extruding force, it is more laborsaving in de- sample inner membrance, conveniently, and ensure the smoothness of sample inner wall surface.Stainless steel
The internal face of three valve outer barrels 2 is adapted with the outside wall surface of hollow cylinder clay sample 10, the outer surface of the valve inner cylinder 8 of stainless steel two with
The inner surface of sample is close together.Stainless steel stent 13 is formed by the completely the same stainless steel plate docking of two panels, stainless steel
There is the lock ring circle 9 with hangers the both sides of three valve outer barrel 2, bolt hole are left on the stainless steel stent 13 of support, by support bracket fastened
Bolt 12 fastens lock ring circle and branch stainless steel frame 13.Lower bottom base 14 is the stainless steel that upper surface is big, lower surface is a small circle
Cylinder, it is used to hold sample preparation cylinder in sample preparation.
Operating procedure during sample preparation is as follows
（1）Sample preparation device is installed, i.e., the valve outer barrel 2 of stainless steel three is fixed with lock ring circle 4, is close to toothed push-down head
11 outside, is placed on base 14, then loads onto the lock ring circle 9 with hangers, whole stainless steel stent 13 and whole system
Sample cylinder fixes, and between pumping board 7 is stuck in into the valve inner cylinder 8 of stainless steel two, is together put into the valve outer barrel 2 of stainless steel three, is close to afterwards
Inner side with tooth push-down head 11, cover inner cylinder cap 3；
（2）The quality of wet soil according to needed for weighing dry density, successively pour into the bitubular of the valve inner cylinder of two stainless steel two, then
Wet soil surface will be buckled in 5 toothed one side of tooth seaming chuck, boosting-rod 1 is placed on the upper surface with tooth seaming chuck 5 afterwards；
（3）The speed of regulation pressure-like machine declines pressure head, when pressure head contacts with boosting-rod 1 and together drops to and stainless steel
During three valve outer barrels, 2 upper end open position, the displacement to pressure-like machine is reset, and mobile sample preparation cylinder makes boosting-rod 1 be in sample preparation cylinder upper end
The surface of opening, the difference of the specimen height with finally needing is calculated, the pressure of pressure head is controlled by computer control system
Real speed, fluffy soil sample is slowly compacted under ram pressures effect, when pressure head drops to certain distance, remove bottom
Seat 14, after overturning whole sample preparation cylinder, base 14 is again placed in the underface of sample preparation cylinder, time of controlled loading and load
Size, until the height of sample needed for reaching；
（4）Whole sample preparation cylinder is located on experimental bench, and boosting-rod transfers force to hollow cylinder sample top by testing machine
Biaxial loadings are realized with bottom, during biaxial loadings, using hangers as axle, are overturn sample preparation cylinder, are ensured the uniformity of sample.During the demoulding,
The cuboid pumping board 7 at inner cylinder center is first extracted, the pressure between removal part inner cylinder and sample, then can easily be unloaded stainless
The valve inner cylinder 8 of steel two；Hollow cylinder clay sample 10 needed for obtaining.
Claims (1)
- A kind of 1. clay hollow cylinder sample sample preparation device, by boosting-rod（1）, the valve outer barrel of stainless steel three（2）, inner cylinder cap（3）、 Lock ring circle（4）, toothed seaming chuck（5）, fixed screw（6）, pumping board（7）, the valve inner cylinder of stainless steel two（8）, lock ring with hangers Circle（9）, hollow cylinder clay sample（10）, toothed push-down head（ 11）, support bracket fastened bolt（12）, stainless steel branch Frame（13）, lower bottom base（14）Form, it is characterised in that：Boosting-rod（1）Section is in " ∏ " shape, is built-in with the valve outer barrel of stainless steel three （2）, the valve outer barrel of stainless steel three（2）Inside it is cased with the valve inner cylinder of stainless steel two（8）, the valve inner cylinder of stainless steel two（8）Through toothed upper pressure Head（5）Arrive at toothed push-down head（11）, inner cylinder cap（3）It is placed in the valve inner cylinder of stainless steel two（8）Top, the valve inner cylinder of stainless steel two （8）It is the pumping board with bow in rectangle that centre, which is embedded with one to be outside,（7）, by toothed seaming chuck（5）With toothed push-down head （11）Separate, the valve outer barrel of stainless steel three（2）With the valve inner cylinder of stainless steel two（8）Between be hollow cylinder clay sample（10）, it is stainless The valve outer barrel of steel three（2）Top and the bottom set lock ring circle（4）, use fixed screw（6）Fastening, middle part set the lock ring circle with hangers （9）, with a stainless steel stent（13）It is connected, with support bracket fastened bolt（12）Fastening, lower bottom base（14）With sample preparation device Bottom contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510399623.5A CN105181404B (en) | 2015-07-09 | 2015-07-09 | Frozen clay hollow cylinder sample sample preparation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510399623.5A CN105181404B (en) | 2015-07-09 | 2015-07-09 | Frozen clay hollow cylinder sample sample preparation device |
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| CN105181404A CN105181404A (en) | 2015-12-23 |
| CN105181404B true CN105181404B (en) | 2017-11-17 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571919B (en) * | 2016-02-02 | 2018-08-24 | 中国科学院武汉岩土力学研究所 | A kind of ring type sample preparation device for cutting experiment for ring |
| CN106644730B (en) * | 2016-12-28 | 2019-04-12 | 哈尔滨工业大学 | Complicated stress environment lower thin sheet deformation process stress-strain measurement device and method |
| CN106840808A (en) * | 2017-04-01 | 2017-06-13 | 宁波工程学院 | A kind of hollow cylinder remoulded sample preparing device |
| CN107515146B (en) * | 2017-09-22 | 2023-06-20 | 中国科学院武汉岩土力学研究所 | Annular remolded soil sample preparation device and sample preparation method for geotechnical annular shear test |
| CN107727477A (en) * | 2017-11-13 | 2018-02-23 | 宁波工程学院 | A kind of hollow cylinder compacted soil samples saturation device |
| CN111855339A (en) * | 2019-04-29 | 2020-10-30 | 中国石油化工股份有限公司 | Frozen soil rock core preparation device and method |
| CN110567777A (en) * | 2019-10-08 | 2019-12-13 | 宁夏大学 | hollow cylinder remolded soil sample bidirectional sample pressing device and method |
| CN113532994B (en) * | 2021-07-22 | 2023-01-10 | 济南大学 | Method for mounting annular compaction device, preparing soil sample and disassembling annular compaction device |
| CN114441262A (en) * | 2022-01-18 | 2022-05-06 | 中国人民解放军陆军勤务学院 | Device and method for preparing undisturbed soil sample for hollow cylinder torsional-shear triaxial test |
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| CN201917484U (en) * | 2010-12-29 | 2011-08-03 | 河海大学 | Saturation device of hollow cylindrical clay sample |
| CN102288461A (en) * | 2011-05-12 | 2011-12-21 | 河海大学 | Large-sized hollow cylindrical sampler for coarse grained soil and use method thereof |
| CN103630433A (en) * | 2013-11-19 | 2014-03-12 | 南京工业大学 | Hollow cylindrical cement-stabilized soil test sample preparation and maintenance device and using method thereof |
| CN103884581A (en) * | 2014-03-24 | 2014-06-25 | 中国矿业大学 | Hollow frozen soil test apparatus and using method of apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5871432A (en) * | 1981-10-23 | 1983-04-28 | Odakyu Kensetsu Kk | Soil test method |
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|---|---|---|---|---|
| CN201917484U (en) * | 2010-12-29 | 2011-08-03 | 河海大学 | Saturation device of hollow cylindrical clay sample |
| CN102288461A (en) * | 2011-05-12 | 2011-12-21 | 河海大学 | Large-sized hollow cylindrical sampler for coarse grained soil and use method thereof |
| CN103630433A (en) * | 2013-11-19 | 2014-03-12 | 南京工业大学 | Hollow cylindrical cement-stabilized soil test sample preparation and maintenance device and using method thereof |
| CN103884581A (en) * | 2014-03-24 | 2014-06-25 | 中国矿业大学 | Hollow frozen soil test apparatus and using method of apparatus |
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Effective date of registration: 20200818 Address after: 730000 No.318, Donggang West Road, Chengguan District, Lanzhou City, Gansu Province Patentee after: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CAS Address before: Chengguan District of Gansu city of Lanzhou province Donggang West Road 730000 No. 320 Patentee before: Institute of environment and Engineering in cold and dry areas, Chinese Academy of Sciences |
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