CN109946128A - A kind of subgrade soils test material preparation device - Google Patents
A kind of subgrade soils test material preparation device Download PDFInfo
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- CN109946128A CN109946128A CN201910177070.7A CN201910177070A CN109946128A CN 109946128 A CN109946128 A CN 109946128A CN 201910177070 A CN201910177070 A CN 201910177070A CN 109946128 A CN109946128 A CN 109946128A
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- sample
- transmission rod
- accommodating chamber
- receiving member
- height
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- 239000002689 soil Substances 0.000 title claims abstract description 103
- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 239000000463 material Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 43
- 230000005540 biological transmission Effects 0.000 claims abstract description 145
- 238000005070 sampling Methods 0.000 claims abstract description 33
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000002706 hydrostatic effect Effects 0.000 claims description 14
- 230000001413 cellular effect Effects 0.000 claims description 6
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 description 11
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- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000012808 vapor phase Substances 0.000 description 3
- 229940099259 vaseline Drugs 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- HPNSNYBUADCFDR-UHFFFAOYSA-N chromafenozide Chemical compound CC1=CC(C)=CC(C(=O)N(NC(=O)C=2C(=C3CCCOC3=CC=2)C)C(C)(C)C)=C1 HPNSNYBUADCFDR-UHFFFAOYSA-N 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
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- 239000004033 plastic Substances 0.000 description 1
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Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to field of road, more particularly to a kind of subgrade soils test material preparation device.The present invention provides a kind of subgrade soils test material preparation device, including bearing member, first transmission rod, second transmission rod, sample receiving member, cushion block and pedestal, bearing member can detachably be connected with the first transmission rod and the second transmission rod respectively, sample receiving member includes sample accommodating chamber, sample accommodating chamber is cylindricality, first transmission rod, second transmission rod and cushion block are cylindricality, the internal diameter of sample accommodating chamber respectively with the first transmission rod, the outer diameter of second transmission rod and cushion block matches, pedestal is equipped with loading end, it further include sampling part, it samples part and is equipped with receiving member holding tank, the internal diameter of receiving member holding tank is matched with the outer diameter of sample receiving member, the bottom of receiving member holding tank is equipped with sample holding tank.Subgrade soils test material preparation device provided herein can finely controllable, convenient and efficient prepare all kinds of soil sample small specimens of molding, ensure the progress of all kinds of soil tests.
Description
Technical field
The present invention relates to field of road, more particularly to a kind of subgrade soils test material preparation device.
Background technique
In technical fields such as road engineering, geotechnical engineering, hydraulic engineerings, to the stress-strain state of various soil mass, microcosmic
Lesser soil sample test specimen need to be often used during the analysis of experiments of structure etc., mercury pore Structure Analysis, vapor phase method matrix is such as pressed to inhale
Power test, the scanning of CT microstructure etc..(the instrument tool instrument of customization specific dimensions first forms big test specimen again to traditional method of preparing sample
It is cut into the methods of small specimen), with high costs, production inconvenience, and the production that progress is greatly limited by instrument tool is tested, not only grasp
Make cumbersome, size to be difficult to control accurately, and easily disturbed sample during the preparation process, influences test result or even misoperation
Destroy soil sample, delay test progress, the limited material of waste.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of subgrade soils test material preparation dresses
It sets, for solving the problems of the prior art.
In order to achieve the above objects and other related objects, one aspect of the present invention provides a kind of subgrade soils test material preparation device,
It is characterised in that it includes bearing member, the first transmission rod, the second transmission rod, sample receiving member, cushion block and pedestal, the bearing member
Can detachably it be connected with the first transmission rod and the second transmission rod respectively, the sample receiving member includes sample accommodating chamber, institute
Stating sample accommodating chamber is cylindricality, and first transmission rod, the second transmission rod and cushion block are cylindricality, the internal diameter of the sample accommodating chamber
It is matched respectively with the outer diameter of first transmission rod, the second transmission rod and cushion block, the height of first transmission rod is less than examination
The height of sample accommodating chamber, the pedestal are equipped with loading end, further include sampling part, and the sampling part is accommodated equipped with receiving member
The internal diameter of slot, receiving member holding tank is matched with the outer diameter of sample receiving member, and the bottom of the receiving member holding tank is equipped with sample
Holding tank, the internal diameter of the sample holding tank are less than the internal diameter of receiving member holding tank.
In some embodiments of the present invention, first transmission rod is cylinder, and second transmission rod is cylinder, institute
Sample accommodating chamber is stated as cylinder, the height of the sample accommodating chamber is 80~120mm, and internal diameter is 5~10mm, and the cushion block is
Cylinder, the height of the cushion block are 10~20mm.
In some embodiments of the present invention, the bearing member is cylindrical body, and an end face of bearing member is pressure bearing face,
Other end is connected with transmission rod.
In some embodiments of the present invention, first transmission rod includes multiple sub- transmission rods being successively detachably connected,
It is preferably threadedly coupled, the height of first transmission rod is the 88~96% of sample accommodating chamber height, second transmission rod
Height be sample accommodating chamber height 88~96%.
In some embodiments of the present invention, the bottom of the sample holding tank is equipped with flexible cellular material 73.
In some embodiments of the present invention, the bearing member, the first transmission rod, sample receiving member, cushion block and pedestal can be with
Hydrostatic profile module is constituted, under the hydrostatic profile module status, the bottom surface of the sample receiving member is located at the loading end of pedestal
On, the bottom of the bearing member is connect with one end of the first transmission rod, and first transmission rod extends into sample appearance from top to bottom
Receive chamber, the cushion block is located at the bottom of sample accommodating chamber；
The bearing member, the second transmission rod, sample receiving member and sampling part may be constructed demoulding sampling module, the demoulding
Under sampling module state, the bottom of the sample receiving member is located in receiving member holding tank, the bottom of the bearing member and second
One end of transmission rod connects, and second transmission rod extends into sample accommodating chamber from top to bottom.
Another aspect of the present invention provides a kind of subgrade soils test material preparation method, uses subgrade soils test material preparation as described above
Device, comprising:
A) sample receiving member is placed on the loading end of pedestal, cushion block is placed in the bottom of sample accommodating chamber, soil sample is set
In the sample accommodating chamber of sample receiving member；
B) bearing member and the first transmission rod are connected, the first transmission rod is protruded into sample accommodating chamber, is applied on bearing member
Loading carries, with the soil sample being compacted in sample accommodating chamber；
C) take out the first transmission rod, and sample receiving member be placed in the receiving member holding tank of sampling part, by bearing member and
The connection of second transmission rod, the second transmission rod is protruded into sample accommodating chamber, is further applied load to obtain test specimen.
In some embodiments of the present invention, the step A) in further include: soil sample is flattened, the quality of soil sample is 0.2~
2.5g。
In some embodiments of the present invention, the height of the first transmission rod, the height of cushion block, the sum of object height of test specimen etc.
In the height of sample accommodating chamber.
In some embodiments of the present invention, the step B) in, the size of load is 20~40kN, the time being further applied load
For 2~5min.
Detailed description of the invention
Fig. 1 is shown as overall structure of the present invention.
Fig. 2 is shown as present invention sampling part enlarged diagram.
Fig. 3 is shown as test specimen compacting schematic diagram of the present invention.
Fig. 4 is shown as test specimen of the present invention and obtains schematic diagram.
Component label instructions
1 bearing member
2 first transmission rods
3 second transmission rods
4 sample receiving members
41 sample accommodating chambers
5 cushion blocks
6 pedestals
61 loading ends
7 sampling parts
71 receiving member holding tanks
72 sample holding tanks
73 flexible cellular materials
8 test specimens
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
It please refers to Fig.1 to Fig.4.It should be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to
Cooperate the revealed content of specification, so that those skilled in the art understands and reads, being not intended to limit the invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, it should all still fall in disclosed skill
Art content obtains in the range of capable of covering.Meanwhile in this specification it is cited as "upper", "lower", "left", "right", " centre " and
The term of " one " etc. is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, relativeness
It is altered or modified, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
As shown in FIG. 1 to FIG. 2, first aspect present invention provides a kind of subgrade soils test material preparation device, including bearing member 1,
First transmission rod 2, the second transmission rod 3, sample receiving member 4, cushion block 5 and pedestal 6, the bearing member 1 can pass respectively with first
Power bar 2 is detachably connected (for example, threaded connection) with the second transmission rod 3, and the sample receiving member 4 includes sample accommodating chamber
41, the sample accommodating chamber 41 is cylindricality, and first transmission rod 2, the second transmission rod 3 and cushion block 5 are cylindricality, and the sample holds
The internal diameter of chamber 41 received is matched with the outer diameter of first transmission rod 2, the second transmission rod 3 and cushion block 5 respectively, first power transmission
The height (extending direction of the corresponding body of rod) of bar 2 is less than the height (extending direction of respective chamber) of sample accommodating chamber 41, described
Pedestal 6 is equipped with the loading end 61 that can be used for carrying sample receiving member, further includes sampling part 7, and the sampling part 7, which is equipped with, to be held
Receive part holding tank 71, the internal diameter of receiving member holding tank 71 is matched with the outer diameter of sample receiving member 4, the receiving member holding tank 71
Bottom be equipped with sample holding tank 72, the internal diameter of the sample holding tank 72 is less than the internal diameter of receiving member holding tank 71.The road
Base soil test material preparation device when in use, can form hydrostatic profile mould by each component of the subgrade soils test material preparation device
Block and demoulding sampling module, the bearing member 1, the first transmission rod 2, sample receiving member 4, cushion block 5 and pedestal 6 may be constructed static pressure
Forming module, for example, the bottom surface of the sample receiving member 4 is located at the loading end 61 of pedestal 6 under the hydrostatic profile module status
On, the bottom of the bearing member 1 is connect with one end of the first transmission rod 2, and first transmission rod 2 extends into sample from top to bottom
Accommodating chamber 41, the cushion block 5 are located at the bottom of sample accommodating chamber 41；In addition, the bearing member 1, the second transmission rod 3, sample hold
It receives part 4 and sampling part 7 may be constructed demoulding sampling module, for example, under the demoulding sampling module state, the sample receiving member
4 bottom is located in receiving member holding tank 71, and the bottom of the bearing member 1 is connect with one end of the second transmission rod 3, and described second
Transmission rod 3 extends into sample accommodating chamber 41 from top to bottom.It more specifically, can be according to the substantially physical of test soil sample when use
Small specimen specification needed for matter and original state (for example, maximum dry density, initial aqueous rate, compactness etc.) and test
Etc. parameters, the soil sample of certain mass is calculated, weighs, and sample receiving member 4 is placed on the loading end 61 of pedestal 6, in sample
The bottom of accommodating chamber 41 is put into cushion block 5, and the bottom of cushion block 5 can be contacted with loading end 61, then accommodates soil sample filling sample
In chamber 41, since the outer diameter of cushion block 5 is matched with the internal diameter of sample accommodating chamber 41, so as to so that cushion block 5 side wall and sample
The inner wall of accommodating chamber 41 is fitted closely and can be slided along its inner wall, so soil sample can be placed in the top of cushion block 5, it is ensured that
Soil particle will not be squeezed out from mutual gap during hydrostatic profile, and can soil sample load, hydrostatic profile during,
Play a part of to protect soil sample, certain number is plugged and pounded to soil sample, and soil sample upper surface is slightly flattened, it is high according to the target of small specimen
Degree, the first transmission rod 1 of selection/assembly appropriate length, and fixed with bearing member 1, the first transmission rod 1 is slowly protruded into sample
In accommodating chamber 41, until contacting with soil sample, the first transmission rod 2 and the contact jaw of soil sample are usually smooth plane, can then be led to
It crosses bearing member 1 to be further applied load (for example, by press machine etc.), is compacted soil sample slowly, until bearing member 1 and sample receiving member 4
Contact, i.e. test specimen reach object height, that is, test specimen reaches target compaction degree, the internal diameter of the sample accommodating chamber 41 and described the
The outer diameter of one transmission rod 2 matches, so as to so that the side of the first transmission rod 2 and the inner wall of sample accommodating chamber 41 fit closely
And it can be slided along its inner wall, it is ensured that soil particle will not be squeezed out from mutual gap during hydrostatic profile, this time control
Stress processed is constant, pressure stabilizing certain time, to make the stress-strain state in test specimen soil sample reach flat by hydrostatic profile module
Weighing apparatus.Sample receiving member 4 can be then removed, and sample receiving member 4 is placed in the receiving member holding tank 71 of sampling part 7, it is described
The internal diameter of sample accommodating chamber 41 is matched with the outer diameter of second transmission rod 3, so as to so that the second transmission rod 3 side wall with
41 inner wall of sample accommodating chamber is fitted closely and can be slided along its inner wall, can be ejected sample by the second transmission rod 3, second
Transmission rod 3 and the contact jaw of soil sample are usually smooth plane, sample can be put into sample by demoulding sampling module and accommodated
In slot 73, to prepare sample.
In subgrade soils test material preparation device provided by the present invention, the transmission rod is usually matched with pressure bearing face,
The interconnecting piece of bearing member 1 and transmission rod may be typically located at the center of bearing member 1, thereby may be ensured that the carrying of pressure bearing face
Load can be transmitted effectively by transmission rod.The bearing member 1 can be cylindrical body, and an end face of cylindrical body can be pressure
Power bearing plane, thus bearing load, another side end face of cylindrical body can be connected with transmission rod, to deliver load to biography
Power bar, two end face can be smooth flats.In a specific embodiment of the invention, the bearing member 1 can be cylinder
The height (short transverse of bearing member 1 can be consistent with the short transverse of sample accommodating chamber 41) of body, the bearing member 1 can be
5~15mm, outer diameter can be 50~100mm.
In subgrade soils test material preparation device provided by the present invention, first transmission rod 2 can be cylinder, described the
Two transmission rods 3 can be cylinder, and the sample accommodating chamber 41 can be cylinder, and the cushion block 5 can be cylinder, when the
When one transmission rod 2, the second transmission rod 3 and cushion block 5 are located in sample accommodating chamber 41, the first transmission rod 2, the second transmission rod 3, sample
Accommodating chamber 41 and cushion block 5 can be with one heart it is coaxial, usually, height, the height of cushion block, the target of test specimen of the first transmission rod
The sum of height is equal to the height of sample accommodating chamber.In a specific embodiment of the invention, the height of the sample accommodating chamber 41 can
Think that 80~120mm, internal diameter can be 5~10mm, the wall thickness of sample accommodating chamber 41 can be 20~50mm, and the sample accommodates
Part 4 can be with the consistent cylinder of 41 extending direction of sample accommodating chamber, more specifically can be the column concentric with sample accommodating chamber 41
Body, the height (height of cushion block can be consistent with the short transverse of sample accommodating chamber 41) of the cushion block 5 can be 10~20mm,
The height of first transmission rod 2 can be less than the height of sample accommodating chamber 41, so as to reserve one in sample accommodating chamber 41
Static pressure is realized in fixed space, specifically, the height of first transmission rod 2 can for 41 height of sample accommodating chamber 88~
96%, the height of second transmission rod 3 can be slightly less than, equal to or more than the height of sample accommodating chamber 41, so as to
Soil sample after static pressure is ejected into cavity, specifically, the height of second transmission rod 3 can be the 88 of 41 height of sample accommodating chamber
~96%.
In subgrade soils test material preparation device provided by the present invention, first transmission rod 2 includes multiple successively detachable
The sub- transmission rod of connection preferably can be threaded connection.In a specific embodiment of the invention, in the bottom of the bearing member 1
The heart can be equipped with screw hole or screw thread, and one end of the first transmission rod 2 and the second transmission rod 3 can be equipped with to be matched with the screw hole
Screw thread or screw hole, so as to realize the threaded connection between the body of rod and bearing member 1, the sub- transmission rod of each head and the tail connection
Junction can be equipped with the screw thread and screw hole worked in coordination, and one end of the sub- transmission rod of end is then the contact surface of soil sample, from
And can according to need the first transmission rod 2 of composition appropriate length, (short transverse of sub- transmission rod is logical for the height of each sub- transmission rod
It is often consistent with the short transverse of transmission rod) it can be 5~10mm.
The typically light of loading end 61 in subgrade soils test material preparation device provided by the present invention, on the pedestal 6
Sliding plane stablizes carrying sample receiving member 4 so as to match with the bottom surface of sample receiving member 4.It is specific real in the present invention one
It applies in example, the pedestal 6 can be cylindrical body, and (height of pedestal 6 can be with the height of sample accommodating chamber 41 for the height of pedestal 6
Direction is consistent) it can be 20~50mm, diameter can be 100~250mm.
In subgrade soils test material preparation device provided by the present invention, the internal diameter of the sample holding tank 72 holds less than receiving member
Receive the internal diameter of slot 71, so as to constitute demould sampling module when, the receiving member that sample receiving member 4 is placed in sampling part 7 is held
It receives in slot 71, the bottom of the sample holding tank 72 is equipped with flexible cellular material, so as to play buffering when obtaining test specimen
Effect, collide with rigid element after avoiding sample from demoulding, and the flexible cellular material can be such as flexible foam, more
Body can be such as foamed plastics.In a specific embodiment of the invention, the wall thickness of the sample holding tank 72 can be 15
~20mm, the sample holding tank 72 can be cylindrical body, and internal diameter can be 10~30mm, and height be (sample holding tank 72
Short transverse can be consistent with the short transverse of receiving member holding tank 71) it can be 20~30mm, the receiving member holding tank 71
Wall thickness can be 5~10mm, the receiving member holding tank 71 can be cylindrical body, and internal diameter can be 25~50mm, height
(short transverse of receiving member holding tank 71 can be consistent with the short transverse of sample accommodating chamber 41) can be 5~20mm, flexible
The thickness of porous material 73 can be 2~4mm.In another specific embodiment of the present invention, the sampling part 7 can be extension side
To with sample holding tank 72 and/or the consistent cylinder of receiving member holding tank 71, more specifically can be with sample holding tank 72 and/or
The concentric cylinder of receiving member holding tank 71.
In subgrade soils test material preparation device provided by the present invention, bearing member 1, the first transmission rod 2, the second transmission rod 3, examination
Sample receiving member 4, cushion block 5, pedestal 6, sampling part 7 usually all have certain rigidity, so as in static pressure and sampling process
Stable delivery load.
Second aspect of the present invention provides a kind of subgrade soils test material preparation method, uses road provided by first aspect present invention
Base soil test material preparation device, comprising:
A) sample receiving member is placed on the loading end of pedestal, cushion block is placed in the bottom of sample accommodating chamber, soil sample is set
In the sample accommodating chamber of sample receiving member；
B) bearing member and the first transmission rod are connected, the first transmission rod is protruded into sample accommodating chamber, is applied on bearing member
Loading carries, with the soil sample being compacted in sample accommodating chamber；
C) take out the first transmission rod, and sample receiving member be placed in the receiving member holding tank of sampling part, by bearing member and
The connection of second transmission rod, the second transmission rod is protruded into sample accommodating chamber, is further applied load to obtain test specimen.
It may include: that sample receiving member is placed in holding for pedestal in subgrade soils test material preparation method provided by the present invention
On section, cushion block is placed in the bottom of sample accommodating chamber, soil sample is placed in the sample accommodating chamber of sample receiving member.Sample is held
Part of receiving is placed on the loading end of pedestal, and cushion block is placed in the bottom of sample accommodating chamber, so as to constitute hydrostatic profile module
The bottom of substructure, cushion block can be with carrying face contact, since the outer diameter of cushion block is matched with the internal diameter of sample accommodating chamber, institute
The top of cushion block can be placed in soil sample, it is ensured that soil particle will not be squeezed out from mutual gap during hydrostatic profile,
And can be loaded in soil sample, hydrostatic profile during, play protection soil sample, the outer wall of cushion block is interior with sample accommodating chamber
Filler (for example, lubricating oil, vaseline, silicone grease etc.) can also be added between wall, further to fill outer wall and the examination of cushion block
Gap between the inner wall of sample accommodating chamber.The step A) in, those skilled in the art can be according to the parameter (example of target sample
Such as, density, height etc.), in conjunction with the size of sample accommodating chamber, the quality for the soil sample added needed for obtaining is calculated, for example, soil sample
Quality can be 0.2~2.5g.After soil sample addition, soil sample can also usually be flattened, when guaranteeing static pressure, soil sample is forming examination
It can be with uniform stressed during part.
It may include: to connect bearing member and the first transmission rod in subgrade soils test material preparation method provided by the present invention,
First transmission rod is protruded into sample accommodating chamber, is further applied load on bearing member, with the soil sample being compacted in sample accommodating chamber.To soil
During sample carries out static pressure, the subgrade soils test material preparation device can usually form hydrostatic profile module, due to the first biography
The sum of the height of power bar, the height of cushion block, object height of test specimen are equal to the height of sample accommodating chamber, so carrying out static pressure
In the process, the bottom surface of bearing member is usually that can contact with the top of sample receiving member, to guarantee the test specimen and mesh that obtain
Dimensioning is consistent.During static pressure, the bottom of first transmission rod is usually contacted with soil sample, due to the outer diameter of the first transmission rod
Matched with the internal diameter of sample accommodating chamber, thus soil sample can by the first transmission rod carry out static pressure, and can guarantee static pressure at
Soil particle will not be squeezed out from mutual gap during type, between the outer wall of the first transmission rod and the inner wall of sample accommodating chamber also
Filler (for example, lubricating oil, vaseline, silicone grease etc.) can be added, further to fill the outer wall and sample of the first transmission rod
Gap between the inner wall of accommodating chamber.The size being further applied load during static pressure and time are to those skilled in the art
It should be adjustable, for example, can be further applied load by press machine, the size of the load applied can be 20~40kN,
The time being further applied load can be 2~5min.
It may include: to take out the first transmission rod, and sample is held in subgrade soils test material preparation method provided by the present invention
Part of receiving is placed in the receiving member holding tank of sampling part, and bearing member and the second transmission rod are connected, the second transmission rod is protruded into sample
In accommodating chamber, it is further applied load to obtain test specimen.During being sampled to test specimen, the subgrade soils test material preparation device is usual
Demoulding sampling module can be formed, during being sampled, the bottom of second transmission rod usually with molding sample
Contact, since the height of the second transmission rod is typically larger than the height of sample accommodating chamber, and the outer diameter of the second transmission rod and sample hold
The internal diameter of chamber received matches, so test specimen can be ejected sample accommodating chamber by the second transmission rod, and can guarantee pickup
Soil sample will not be left in journey in sample accommodating chamber, can also be added between the outer wall of the second transmission rod and the inner wall of sample accommodating chamber
Packing (for example, lubricating oil, vaseline, silicone grease etc.), further to fill the outer wall and sample accommodating chamber of the second transmission rod
Inner wall between gap.The size of load applied in sampling process and time should be to those skilled in the art
Adjustable, for example, can be further applied load by press machine, the size of the load applied can be 5~30kN, be further applied load
Time to test specimen be pushed out cavity.
Third aspect present invention provides the subgrade soils test material preparation device of size adjustable provided by first aspect present invention
With subgrade soils test material preparation method provided by second aspect of the present invention in the purposes in geotechnical testament field.
In conclusion the application is by providing a kind of subgrade soils test material preparation device of size adjustable, towards all kinds of geotechniques
It tests and the difference of small specimen size (diameter, height) is required, using the devices such as existing press machine and limited rock-soil material,
It is fine controllably, convenient and efficient to prepare all kinds of soil sample small specimens of molding based on the equipment adjustment of the components such as test specimen tube, transmission rod,
Ensure the progress of all kinds of soil tests.
Embodiment 1
To carry out the test of vapor phase method matric suction, the soil-water characteristic curve of soil sample under different compactnesss is probed into, needs to prepare
Multiple subgrade soils test specimens that Pass Test specification and size require.
The subgrade soils required in test be granite residual soil, it is desirable that initial aqueous rate be 5%, accordingly in advance drying,
It sprinkles water, mix thoroughly, stewing making soil sample.According to 3 kinds of compactnesss of soil sample of test requirements document: 85%, 90%, 95% and soil sample basic object
Rationality matter: maximum dry density 2.2g/cm3, determine that the soil sample dry density under 3 kinds of compactnesss is respectively 1.87g/cm3、1.98g/
cm3、2.09g/cm3.The dimensions of soil sample is diameter 10mm, and the cylindrical body of height 10mm determines the soil sample under 3 kinds of compactnesss
Quality is respectively 1.47g, 1.56g, 1.64g.The height for determining sample accommodating chamber 41 simultaneously is 80mm, and the first transmission rod 2 is by 3
Height is that the total height after the sub- transmission rod of 20mm is assembled is 60mm, and the height of cushion block 5 is 10mm；First transmission rod 2, cushion block
5 and the diameter of sample accommodating chamber 41 be 10mm；The wall thickness of sample receiving member 4 is 10mm；The diameter of force bearing disk 1 is 60mm, high
Degree is 5mm；The height of pedestal 6 is 10cm, diameter 100mm；；The height of receiving member holding tank 71 be 10mm, internal diameter 30mm,
Wall thickness is 5mm；The height of sample holding tank 72 is 20mm, internal diameter 20mm, wall thickness 10mm；The thickness of flexible cellular material 73
For 2mm.
Soil sample under 3 kinds of compactnesss is pressed corresponding quality respectively and is packed into sample appearance by preparation method as described above
Receive chamber, under be successively placed with cushion block and pedestal in advance；The first transmission rod is protruded into sample accommodating chamber, starting press machine makes to press
In force bearing disk, it is slowly densified to load pan bottom and sample receiving member upper contact, soil sample reaches target compaction degree at this time, makes to press
Press ram remains stationary, pressure stabilizing 1min；Press ram is risen, sample receiving member is removed, takes out the first transmission rod and cushion block；
Sampling part is mounted in sample receiving member bottom, the first transmission rod is loaded on the sub- transmission rod that 1 height is 20mm, makes total height
For 80mm；The first transmission rod is protruded into sample accommodating chamber, starting press machine makes to apply pressure to force bearing disk, extrudes sample slowly；
Follow-up test can be carried out by taking out sample.
After vapor phase method matric suction is tested, takes out sample and pulverize, dry, its quality is weighed, to check sample preparation and examination
As a result as shown in the table the precision tested, while being observed and preparing sample undisturbed defect after molding, during the test without soil
Particle is unrestrained, it is seen that preparation facilities provided by the invention and method are largely effective.
Table 1
In conclusion the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of subgrade soils test material preparation device, which is characterized in that including bearing member (1), the first transmission rod (2), the second power transmission
Bar (3), sample receiving member (4), cushion block (5) and pedestal (6), the bearing member (1) can respectively with the first transmission rod (2) and
Two transmission rods (3) are detachably connected, and the sample receiving member (4) includes sample accommodating chamber (41), the sample accommodating chamber
It (41) is cylindricality, first transmission rod (2), the second transmission rod (3) and cushion block (5) are cylindricality, the sample accommodating chamber (41)
Internal diameter matched respectively with the outer diameter of first transmission rod (2), the second transmission rod (3) and cushion block (5), first power transmission
The height of bar (2) is less than the height of sample accommodating chamber (41), and the pedestal (6) is equipped with loading end (61), further includes sampling part
(7), the sampling part (7) is equipped with receiving member holding tank (71), the internal diameter of receiving member holding tank (71) and sample receiving member (4)
Outer diameter match, the bottom of the receiving member holding tank (71) is equipped with sample holding tank (72), the sample holding tank (72)
Internal diameter be less than receiving member holding tank (71) internal diameter.
2. a kind of subgrade soils test material preparation device as described in claim 1, which is characterized in that first transmission rod (2) is
Cylinder, second transmission rod (3) are cylinder, and the sample accommodating chamber (41) is cylinder, the sample accommodating chamber
(41) height is 80~120mm, and internal diameter is 5~10mm, and the cushion block (5) is cylinder, and the height of the cushion block (5) is 10
~20mm.
3. a kind of subgrade soils test material preparation device as described in claim 1, which is characterized in that the bearing member (1) is cylinder
One end face of body, bearing member (1) is pressure bearing face, and other end is connected with transmission rod.
4. a kind of subgrade soils test material preparation device as described in claim 1, which is characterized in that the first transmission rod (2) packet
Multiple sub- transmission rods being successively detachably connected are included, are preferably threadedly coupled, the height of first transmission rod (2) is sample appearance
Receive the 88~96% of chamber (41) height, the height of second transmission rod (3) is the 88~96% of sample accommodating chamber (41) height.
5. a kind of subgrade soils test material preparation device as described in claim 1, which is characterized in that the sample holding tank (72)
Bottom is equipped with flexible cellular material (73).
6. a kind of subgrade soils test material preparation device as described in claim 1, which is characterized in that the bearing member (1), first pass
Power bar (2), sample receiving member (4), cushion block (5) and pedestal (6) may be constructed hydrostatic profile module, the hydrostatic profile module shape
Under state, the bottom surface of the sample receiving member (4) is located on the loading end (61) of pedestal (6), the bottom of the bearing member (1) and the
One end of one transmission rod (2) connects, and first transmission rod (2) extends into sample accommodating chamber (41), the cushion block from top to bottom
(5) it is located at the bottom of sample accommodating chamber (41)；
The bearing member (1), the second transmission rod (3), sample receiving member (4) and sampling part (7) may be constructed demoulding sampling module,
Under the demoulding sampling module state, the bottom of the sample receiving member (4) is located in receiving member holding tank (71), the load
The bottom of part (1) is connect with one end of the second transmission rod (3), and second transmission rod (3) extends into sample receiving from top to bottom
Chamber (41).
7. a kind of subgrade soils test material preparation method uses the subgrade soils test specimen system as described in claim 1~6 any claim
Standby device, comprising:
A) sample receiving member is placed on the loading end of pedestal, cushion block is placed in the bottom of sample accommodating chamber, soil sample is placed in examination
In the sample accommodating chamber of sample receiving member；
B) bearing member and the first transmission rod are connected, the first transmission rod is protruded into sample accommodating chamber, applies lotus on bearing member
It carries, with the soil sample being compacted in sample accommodating chamber；
C the first transmission rod) is taken out, and sample receiving member is placed in the receiving member holding tank of sampling part, by bearing member and second
Transmission rod connection, the second transmission rod is protruded into sample accommodating chamber, is further applied load to obtain test specimen.
8. subgrade soils test material preparation method as claimed in claim 7, which is characterized in that the step A) in further include: it will be native
Sample leveling, the quality of soil sample are 0.2~2.5g.
9. subgrade soils test material preparation method as claimed in claim 7, which is characterized in that the height of the first transmission rod, cushion block
Highly, the sum of object height of test specimen is equal to the height of sample accommodating chamber.
10. subgrade soils test material preparation method as claimed in claim 7, which is characterized in that the step B) in, the size of load
For 20~40kN, the time being further applied load is 2~5min.
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| CN201910177070.7A CN109946128A (en) | 2019-03-08 | 2019-03-08 | A kind of subgrade soils test material preparation device |
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| CN201910177070.7A CN109946128A (en) | 2019-03-08 | 2019-03-08 | A kind of subgrade soils test material preparation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487163A (en) * | 2020-04-21 | 2020-08-04 | 重庆大学 | Novel variable-load pressurizing grouting test device for fractured coal and rock mass |
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