CN110274830A - A kind of drift-sand Modified soil tensile characteristics test macro - Google Patents
A kind of drift-sand Modified soil tensile characteristics test macro Download PDFInfo
- Publication number
- CN110274830A CN110274830A CN201910311635.6A CN201910311635A CN110274830A CN 110274830 A CN110274830 A CN 110274830A CN 201910311635 A CN201910311635 A CN 201910311635A CN 110274830 A CN110274830 A CN 110274830A
- Authority
- CN
- China
- Prior art keywords
- pulling block
- block
- drift
- pressure
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 239000004576 sand Substances 0.000 title claims abstract description 46
- 239000002689 soil Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 claims abstract description 19
- 238000012546 transfer Methods 0.000 claims abstract description 11
- 230000033001 locomotion Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 230000000694 effects Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000013480 data collection Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 3
- 238000002407 reforming Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 8
- 239000000523 sample Substances 0.000 description 59
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005527 soil sampling Methods 0.000 description 2
- 238000004154 testing of material Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 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 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
A kind of drift-sand Modified soil tensile characteristics test macro is specially adapted for convenient, the accurate test of drift-sand modified material uniaxial direct tensile intensity.It is characterized in that, Zola's block is engaged with right pulling block and is connected to form whole pulling block, fixing buckle is arranged in Zola's block and right pulling block outer wall contact area, fixing buckle is mutually twisted, horizontal transverse movement dislocation occurs for entirety pulling block when limiting sample preparation, extensometer one end connects Zola's block end, the other end connects right pulling block end, whole pulling block top connects left armlet and right armlet, it is connected between two armlets and whole pulling block by prominent limiting stand in the middle part of whole pulling block both ends, lower pressure plate directly acts on sample, lower pressure plate top, which is longitudinally equally spaced, fixes three for transmitting the transfer column of pressure, the fixed upper pressure plare in transfer column top；Suitable for utilizing more accurate, convenient, efficiently test drift-sand Modified soil the tensile strength of conventional press under laboratory condition.
Description
Technical field
The present invention relates to a kind of drift-sand Modified soil tensile characteristics test macros, and it is straight to be specially adapted for drift-sand modified material
Connect convenient, the accurate test of tensile strength.
Background technique
Drift-sand is the Quaternary Period eluvium that stream is formed in alluvial plain, is distributed widely in Xinjiang, interior in China
Nine provinces and regions such as Mongolia, Qinghai, Gansu, Shaanxi and Ningxia.However drift-sand has that hole is big, water penetration is strong, non-plastic and anti-
The features such as intensity is low is cut, is difficult to build up the road for meeting high-grade line project (high-speed rail, highway) requirement merely with drift-sand
Dike can not only reduce it by project cost, while energy there is an urgent need to which the adhesive materials such as cement are added to be modified it processing
Meet requirement of the line project to deformation and stability.Therefore, the mechanics for testing and analyzing different conditions drift-sand Modified soil refers to
Mark is particularly important.Drift-sand Modified soil is as a kind of fragile material, and in many intensity indexs, the test of tensile strength is aobvious
It is particularly difficult and crucial, presently, there are test method in, either uniaxial direct tensile method or indirect pulling method, all in the presence of one
Determine defect, when such as using Brazilian split the law tested for tensile strength, drift-sand modified soil sample not only " is drawn bad " when destroying, together
When will receive the influence of compression so as to cause test data generate error；As patent CN105043866A is split using Brazilian disc
Method is split, it is larger that tensile strength values error is measured when sample tensile strength is more too small than compression strength；Such as patent CN206832593U
The hubbing of use, load using manual operation, the speed of artificial loading velocity will have a direct impact on test data accuracy and
Convenience；For another example patent CN205175835U is loaded using scale pan, although the consistency of loading velocity is improved, nothing
Method accomplishes to measure the Precise control of rate, while carrying out displacement measurement using dial gauge, and test data is not accurate enough.The present invention
A kind of drift-sand Modified soil tensile strength test system integrating sample preparation and test is provided, not only realizes drift-sand Modified soil
The integration of sample preparation, while the common Material Testing Machine in laboratory can be used, tensile strength test is carried out to sample, it solves
Problem not convenient enough to drift-sand Modified soil tensile strength test at present and that measuring accuracy is not accurate enough is desert area wind
The research and application of sand modified material provide effective laboratory testing method.
Summary of the invention
It is much smaller than the material property of compression strength for drift-sand modified material tensile strength, a kind of laboratory conditions are provided
Under convenient sample preparation, the tensile strength test system accurately tested, be suitable under laboratory condition it is relatively accurate using conventional press,
Tensile strength that is convenient, efficiently testing drift-sand Modified soil.
The technical solution adopted by the present invention to solve the technical problems:
A kind of drift-sand Modified soil tensile characteristics test macro, which is characterized in that each section is suitable according to connecting from top to bottom
Sequence is followed successively by, and Zola's block (6) is engaged with right pulling block (7) and is connected to form whole pulling block, and Zola's block (6) and right pulling block (7) outer wall connect
Region setting fixing buckle (10) is touched, fixing buckle (10) is mutually twisted, and horizontal transverse movement occurs for entirety pulling block wrong when limiting sample preparation
Position, extensometer (11) one end connect Zola's block (6) end, and the other end connects right pulling block (7) end, and whole pulling block top connection is left
Armlet (15) and right armlet (16) are connected between two armlets and whole pulling block by prominent limiting stand in the middle part of whole pulling block both ends,
Lower pressure plate (21) directly acts on sample, and lower pressure plate (21) top, which is longitudinally equally spaced, fixes three for transmitting pressure
Transfer column (20), transfer column (20) top are fixed upper pressure plare (17)；
Rectangular base frame (1) and Zola's plate (3) are rigidly connected, and bedframe (1) is disposed with sliding rail, right whole pulling block living
Top connects left armlet (15) and right armlet (16), is limited between two armlets and whole pulling block by prominent in the middle part of whole pulling block both ends
Position platform is connected, and lower pressure plate (21) directly acts on sample, and lower pressure plate (21) top, which is longitudinally equally spaced, to be fixed three and be used for
The transfer column (20) of pressure is transmitted, transfer column (20) top is fixed upper pressure plare (17)；
Rectangular base frame (1) and Zola's plate (3) are rigidly connected, and bedframe (1) is disposed with sliding rail, right activity pulling plate
(4) it is connected to sliding rail and forms movable end, fixed more fixed corner posts (2) at bedframe (1) each endpoint, fixed corner post (2) top
The fixed lid (13) in portion connection top, hydraulic conversion pipe (9) tube body pass through fixed lid (13) center reserving hole in top, hydraulic conversion
Pipe (9) lower nozzle piston (8) is corresponding with stress meter (12) that are rigidly connected at right movable pulling plate (4) center, hydraulic conversion
Pipe (9) upper orifice piston is connected with pressure effect end (22).
Further, in junction using zigzag occlusion (18), zigzag is engaged (18) for Zola's block (6) and right pulling block (7)
It is provided with step limit part (19).
Further, wherein the fixed lid (13) in the top in tensile strength test mold uses hollow design, reduces fixed angles
The pressure that column (2) is born.
Sample (14) is placed in whole pulling block, right activity pulling plate (4) is slided on sliding rail (5), hydraulic conversion pipe (9)
Piston (8) it is consistent with right movable pulling plate (4) direction of motion on sliding rail (5)；By Zola's block (6) and right pulling block (7) end
The center groove and push-in of prominent limiting stand alignment tensile strength test mold Zola plate (3) and right movable pulling plate (4), will fix
Button (10) is unlocked, and adjustment piston (8) position makes it be in close contact stress meter (12), extensometer (11) and stress meter (12) acquisition
Data simultaneously transfer data to data collection station (23)；
Conventional press longitudinal pressure is converted to lateral pull by hydraulic conversion pipe (9)；On the one hand by the longitudinal direction of press machine
Pressure constant speed level conversion on the other hand measures the pressure being applied on right movable pulling plate (4) to right movable pulling plate (4)；
The middle section of Zola's block (6) and the contact of right pulling block (7) outer wall is equipped with the fixing buckle (10) being mutually twisted, in sample preparation
When locking fixing buckle (10), guarantee that in horizontal cross mobile dislocation will not occur for sample in sample preparation, unlock fixation in test
It detains (10), releases sample and transversely and horizontally constrain.
Conventional press longitudinal pressure is converted into lateral pull using hydraulic conversion device；Hydraulic reforming unit upper end with
Press machine loading end directly contacts, and lower end corresponds to pressure sensor, and pressure sensor and right movable pulling plate are rigidly connected, a side
The longitudinal pressure constant speed level conversion of press machine to right movable pulling plate, on the other hand can be measured accurately and be applied on tension board by face
Pressure be denoted as P, using the sliding rail dynamic friction coefficient μ tested before test, obtain being applied to the modified soil sample both ends of drift-sand
Drawing force F, i.e. F=P-G μ, wherein G is the sum of the weight of pressure sensor and right end tension board；When test, it will contain
The lateral push-in left and right pressure plare of the pulling block of the modified soil sample of drift-sand, it is ensured that be interlocked between pulling block and pulling plate and seamless postposition
In pressure machine platform, pulling block fixing buckle is unlocked, press machine loading speed, cracking pressure sensor acquisition device and displacement meter are set
Data collection station is connected computer, starts press machine, can carry out drift-sand Modified soil tensile strength test by acquisition device.
A kind of drift-sand Modified soil tensile characteristics test macro, overall structure are divided into two parts: drift-sand Modified soil system
Original mold tool, drift-sand Modified soil tensile strength test mold.
Drift-sand Modified soil sampling die is mainly by partially forming: pulling block, armlet and pressing plate.Pulling block is designed as " I-shaped
Type " can provide constraint for the molding of drift-sand Modified soil and provide pulling force effect face for tested for tensile strength, to avoid influencing
Test stress concentration effect uses radiused design in connecting portion.Pulling block is symmetrically divided into left and right two parts, two parts by middle part
Internal structure one, which is shown, guarantees that sample tensile strength does not bias situation because shape changes, and is stung in junction using zigzag
Conjunction connects to be limited in sample when carrying out sample preparation or test and horizontal direction displacement occurs.The side that pulling block or so two parts are in contact
The fixed lock for intersecting and being engaged is respectively arranged to guarantee that two parts are integrated in sample preparation, and in test sample tensile strength
When fixed lock must open so that left and right two parts accessible can pull open.Extensometer is installed in pulling block end, and extensometer corresponds in opposite directions
To measure the deflection of sample generation in being stretched destructive process.Armlet, pressure plare are synchronous to participate in sample preparation operation, and armlet is embedding
It is placed on above pulling block, sufficiently compresses sample for original loose condition (of surface) sample for pressing plate and compression space is provided, and prevent regulation weight
After the sample of amount is pressurized outside the loss to pulling block of part；Pressing plate is compacted drift-sand Modified soil, it is ensured that concentrated force is uniformly made
With to each stress surface of drift-sand Modified soil.
Drift-sand Modified soil tension mold can not accurately test drift-sand for existing conventional material testing machine in laboratory
Conventional press longitudinal pressure is converted to lateral pull using hydraulic conversion device by the situation of Modified soil tensile strength.It is hydraulic
Reforming unit upper end is directly contacted with press machine loading end, and lower end corresponds to pressure sensor, and pressure sensor and right activity are drawn
On the one hand on the other hand plate rigid connection can accurately survey the longitudinal pressure constant speed level conversion of press machine to right movable pulling plate
The pressure (being denoted as P) that must be applied on tension board can must be applied to drift-sand Modified soil using the dynamic friction coefficient (μ) of sliding rail
The drawing force (F) at sample both ends, i.e. F=P-G μ, wherein G is the sum of the weight of pressure sensor and right end tension board.
When test, the pulling block for containing the modified soil sample of drift-sand is laterally pushed into left and right pressure plare, it is ensured that be engaged between pulling block and pulling plate
Close and it is seamless be placed on pressure machine platform, unlock pulling block fixing buckle, press machine loading speed be set, cracking pressure sensor is adopted
Data collection station is connected computer, starts press machine, can carry out drift-sand Modified soil by acquisition means and displacement meter acquisition device
Tensile strength test.
Beneficial effects of the present invention
Drift-sand Modified soil sampling die is matched with drift-sand Modified soil tensile strength test mold, and sampling die is special
For tensile strength test mold design, there is high compatible degree.Sample is not taken out after the completion of sample preparation, sample is contained in built in mold
In test macro, prevent from causing structure to destroy on sample because probe intensity fragility is by external disturbance after taking out sample.This
System can once complete sample preparation, tested for tensile strength two operations, greatly reduce testing cost and because unstable caused by the time
Property.Automatic control is realized in sample preparation, tested for tensile strength process, reduces error caused by human factor, and test knot is effectively ensured
The accuracy of fruit.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is tensile strength test overall system architecture schematic diagram
Fig. 2 is sampling die structural schematic diagram
Fig. 3 is tension testing mould front view
Fig. 4 is tension testing mould right view
Fig. 5 is left and right pulling block construction diagrams
Fig. 6 is hydraulic conversion pipe schematic diagram
In figure: 1. bedframes；2. fixed corner post；3. Zola's plate；4. right activity pulling plate；5. sliding rail；6. Zola's block； 7.
Right pulling block；8. piston；9. hydraulic conversion pipe；10. fixing buckle；11. extensometer；12. stress meter；13. the fixed lid in top；14. examination
Sample；15. left armlet；16. right armlet；Pressure plare on 17.；18. zigzag occlusal contact condition part；19. step limit part；20.
Transfer column；21. lower pressure plate；22. pressure acts on end；23. data collection station
Specific embodiment:
Implementation method of the invention is broadly divided into two parts: preparing sample, test sample tensile strength.
Each section is followed successively by according to the order of connection from top to bottom, sampling die, and Zola's block (6) and right pulling block (7) pass through limit
The zigzag occlusion (18) of the horizontal linear deformation displacement of sample processed generation in compressive deformation is connected to form whole pulling block, zigzag
Step limit part (19) is provided with below occlusion (18) makes sample avoid generating in sample preparation vertically to displacement, Zola's block
(6) it is mutually twisted with right pulling block (7) outer wall contact area setting fixing buckle (10), fixing buckle (10), is integrally drawn when limiting sample preparation
Horizontal transverse movement dislocation occurs for block.Extensometer (11) connects Zola's block (6) and right pulling block (7) end, and whole pulling block top connects
Left armlet (15) and right armlet (16) are connect, pass through prominent limiting stand phase in the middle part of whole pulling block both ends between two armlets and whole pulling block
Even, avoid between armlet and whole pulling block that there are gaps.Lower pressure plate (21) directly acts on sample, and concentrated force is evenly dispersed
Sample is passed to, lower pressure plate (21) top, which is longitudinally equally spaced, fixes three for transmitting the transfer column (20) of pressure, transmitting
Column (20) top is fixed upper pressure plare (17), and upper pressure plare (17) is the direct zone of action of pressure.
Tensile strength test mold, rectangular base frame (1) and Zola's plate (3) are rigidly connected, lean in the middle part of bedframe (1)
Right place arranges short distance sliding rail, and right activity pulling plate (4) is connected to sliding rail and forms movable end, the system being displaced using reinforcing rib design guarantee
One property.Four fixed corner posts (2) are fixed at bedframe (1) each endpoint, the fixed lid in connection top at the top of fixed corner post (2)
(13), hydraulic conversion pipe (9) tube body passes through fixed lid (13) center reserving hole in top, and hydraulic conversion pipe (9) lower nozzle is living
Plug (8) is corresponding with stress meter (12) that are rigidly connected at right movable pulling plate (4) center, and hydraulic conversion pipe (9) upper orifice is living
Plug is connected with pressure effect end (22).
Sample (14) is placed in whole pulling block by test sample tensile strength, and right activity pulling plate (4) is raised in sliding rail (5)
To appropriate location, Zola's block (6) is directed at tensile strength test mold Zola's plate with the protrusion limiting stand of right pulling block (7) end
(3) with the center groove and push-in of right movable pulling plate (4), fixing buckle (10) are fastened, adjustment piston (8) position keeps it close
Contact stress meter (12).Extensometer (11) and stress meter (12) acquisition data simultaneously transfer data to data collection station (23).
The course of work
It by two pulling blocks of left and right and closes, locking fixing buckle forms entirety, and it is locking to place armlet above.Aeolian accumulation needed for configuration
Husky modified material, the compacting of multi-level recognition pressing plate, and conserved in pulling block.
Tension testing mould is pushed into together together with pulling block using the sample that maintenance is completed, and is mutually linked closely with snap-gauge.Tension is surveyed
Test die is placed under press machine, and adjusting the piston being connected with hydraulic conversion pipe right end makes it be in close contact stress meter central portion
Press machine initial loading rate is arranged in position, is slowly forced into the behaviour in service of pressure gauge debugging extensometer and pressure gauge.It is tried
When testing, by the monitoring data of stress meter and extensometer, sample stress-strain behavior and tensile strength characteristic are reacted, is aeolian accumulation
The research of husky Modified soil tensile strength provides data basis.
Data correction
Inevitably factor leads to test data there are errors during test.Between right activity pulling plate pedestal and sliding rail
Existing frictional force, it is bigger than normal so as to cause stress meter registration, and experimental enviroment is different, coefficient of friction can also change, therefore try
The data needs got are tested to be modified.Measurement coefficient of friction is first had to, measurement coefficient of friction local environment should be as far as possible close to survey
Determine environment when sample tensile strength, reduces external factor interference, and then eliminate stress meter measurement error.Measure friction coefficient μ
It is carried out before sample preparation, the vacant kerve of locking fixing buckle is pushed into tension testing mould, started press machine with sample and load speed
For the slow uniform load of rate until right movable pulling plate stops after uniform movement takes place, reading stress meter reads σ1(MPa), S is
Piston area (with stress meter the sensor contact area) (mm being connected with hydraulic conversion pipe2).Frictional force at this time
Ff=σ1S can calculate the exact numerical of μ
In formula, σ1The reading (MPa) of uniform motion occurs for right movable pulling plate；M1For the quality (kg) of right pulling block；M2For the right side
The quality (kg) of movable pulling plate.
Frictional force F between right activity pulling plate and sliding railfIt is calculated as follows
In formula, μ is the friction factor between right movable pulling plate bottom and sliding rail, M1For the quality (kg) of right pulling block, M2For the right side
The quality (kg) of movable pulling plate, M3For sample mass (kg), g takes 9.8N/kg.
The tensile strength R of sample after the testm(MPa), it is calculated as follows
Rm=(σh·s-Ff)/sA
In formula, σh(MPa) is read on stress meter when being pulled off for sample；S is the piston area being connected with hydraulic conversion pipe
Product (mm2)；FfFrictional force (N) when being pulled off for sample between right activity pulling plate and sliding rail；sAFor sample original cross-sectional area
(mm2)。
By the data measured in analysis test, the tensile stress and strain of sample are calculated using side formula, is finally obtained
The tensile strength of sample.Using above-mentioned data, can to stress-strain behavior of the drift-sand Modified soil under different loading environments with
And tensile strength feature has deep cognition, to provide test reference for the modification of drift-sand and engineer application.
Claims (5)
1. a kind of drift-sand Modified soil tensile characteristics test macro, which is characterized in that each section is according to the order of connection from top to bottom
It is followed successively by, Zola's block (6) is engaged with right pulling block (7) and is connected to form whole pulling block, Zola's block (6) and the contact of right pulling block (7) outer wall
Fixing buckle (10) are arranged in region, and fixing buckle (10) is mutually twisted, and horizontal transverse movement dislocation occurs for entirety pulling block when limiting sample preparation,
Extensometer (11) one end connects Zola's block (6) end, and the other end connects right pulling block (7) end, and whole pulling block top connects left shield
Arm (15) and right armlet (16) are connected between two armlets and whole pulling block by prominent limiting stand in the middle part of whole pulling block both ends, under
Pressure plare (21) directly acts on sample, and lower pressure plate (21) top, which is longitudinally equally spaced, fixes three for transmitting the biography of pressure
It passs column (20), transfer column (20) top is fixed upper pressure plare (17)；
Rectangular base frame (1) and Zola's plate (3) are rigidly connected, and bedframe (1) is disposed with sliding rail, and right activity pulling plate (4) is even
It is connected to sliding rail and forms movable end, fixed more fixed corner posts (2) at bedframe (1) each endpoint, connection at the top of fixed corner post (2)
The fixed lid (13) in top, hydraulic conversion pipe (9) tube body pass through fixed lid (13) center reserving hole in top, hydraulic conversion pipe (9)
Lower nozzle piston (8) is corresponding with stress meter (12) that are rigidly connected at right movable pulling plate (4) center, hydraulic conversion pipe (9)
Upper orifice piston is connected with pressure effect end (22).
2. a kind of drift-sand Modified soil tensile characteristics test macro according to claim 1, the wherein left side in sampling die
In junction using zigzag occlusion (18), zigzag occlusion (18) is provided with step limit part for pulling block (6) and right pulling block (7)
(19)。
3. a kind of drift-sand Modified soil tensile characteristics test macro according to claim 1, wherein tensile strength test mould
The fixed lid (13) in top in tool uses hollow design, reduces the pressure that fixed corner post (2) are born.
4. a kind of application method of drift-sand Modified soil tensile characteristics test macro as described in claim 1, which is characterized in that
Sample (14) is placed in whole pulling block, right activity pulling plate (4) is slided on sliding rail (5), the piston of hydraulic conversion pipe (9)
(8) consistent with right movable pulling plate (4) direction of motion on sliding rail (5)；Zola's block (6) and the prominent of right pulling block (7) end are limited
The center groove and push-in of position platform alignment tensile strength test mold Zola plate (3) and right movable pulling plate (4), by fixing buckle (10)
It unlocks, adjustment piston (8) position makes its close contact stress meter (12), extensometer (11) and stress meter (12) acquisition data and will
Data are transferred to data collection station (23)；
Conventional press longitudinal pressure is converted to lateral pull by hydraulic conversion pipe (9)；On the one hand by the longitudinal pressure of press machine
Constant speed level conversion on the other hand measures the pressure being applied on right movable pulling plate (4) to right movable pulling plate (4)；
The middle section of Zola's block (6) and the contact of right pulling block (7) outer wall is equipped with the fixing buckle (10) being mutually twisted, and locks in sample preparation
It closes fixing buckle (10), guarantees that in horizontal cross mobile dislocation will not occur for sample in sample preparation, unlock fixing buckle in test
(10), sample is released transversely and horizontally to constrain.
5. according to the method described in claim 4, it is characterized by:
Conventional press longitudinal pressure is converted into lateral pull using hydraulic conversion device；Hydraulic reforming unit upper end and pressure
Machine loading end directly contacts, and lower end corresponds to pressure sensor, and pressure sensor and right movable pulling plate are rigidly connected, on the one hand will
On the other hand the longitudinal pressure constant speed level conversion of press machine can accurately measure the pressure being applied on tension board to right movable pulling plate
Power is denoted as P, using the dynamic friction coefficient μ of sliding rail, obtains the drawing force F, i.e. F that are applied to the modified soil sample both ends of drift-sand
=P-G μ, wherein G is the sum of the weight of pressure sensor and right end tension board；When test, the examination of drift-sand Modified soil will be contained
The lateral push-in left and right pressure plare of the pulling block of sample, it is ensured that be interlocked between pulling block and pulling plate and it is seamless be placed on pressure machine platform,
Pulling block fixing buckle is unlocked, press machine loading speed, cracking pressure sensor acquisition device and displacement meter acquisition device are set, will be counted
Computer is connected according to acquisition terminal, starts press machine, drift-sand Modified soil tensile strength test can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910311635.6A CN110274830A (en) | 2019-04-18 | 2019-04-18 | A kind of drift-sand Modified soil tensile characteristics test macro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910311635.6A CN110274830A (en) | 2019-04-18 | 2019-04-18 | A kind of drift-sand Modified soil tensile characteristics test macro |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110274830A true CN110274830A (en) | 2019-09-24 |
Family
ID=67959518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910311635.6A Pending CN110274830A (en) | 2019-04-18 | 2019-04-18 | A kind of drift-sand Modified soil tensile characteristics test macro |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110274830A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203634A (en) * | 2021-04-23 | 2021-08-03 | 防灾科技学院 | Intelligent maintenance and temperature and humidity control loading test system for aeolian sand modified soil |
| CN113533686A (en) * | 2021-06-28 | 2021-10-22 | 中铁时代建筑设计院有限公司 | Liquid plastic limit automation equipment for measuring soil |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614638A (en) * | 2009-07-10 | 2009-12-30 | 清华大学 | A kind of horizontal triaxial tension and compression tester |
| CN102901669A (en) * | 2012-08-23 | 2013-01-30 | 苏州南智传感科技有限公司 | 8-analogue-shaped soil uniaxial tensile tester |
| CN103674723A (en) * | 2013-12-04 | 2014-03-26 | 西北农林科技大学 | Test method for determining uniaxial tensile strength of soil mass |
| CN103954512A (en) * | 2014-05-23 | 2014-07-30 | 上海核工程研究设计院 | Device and method for testing breaking tenacity of compact tension specimen in low-temperature environment |
| CN104062180A (en) * | 2014-06-06 | 2014-09-24 | 河海大学 | Experiment device and method for testing uniaxial drawing property of soil body |
| CN104062173A (en) * | 2014-06-24 | 2014-09-24 | 北京交通大学 | Soil tensile strength testing apparatus |
| CN204255718U (en) * | 2014-11-20 | 2015-04-08 | 中国人民解放军后勤工程学院 | A kind of semi-automatic multifunction soil test pressure-like machine |
| CN204269475U (en) * | 2014-11-28 | 2015-04-15 | 中国科学院寒区旱区环境与工程研究所 | Tensile Strength of Frozen Soil proving installation |
| CN104931349A (en) * | 2015-06-10 | 2015-09-23 | 合肥通用机械研究院 | Seal friction compensation method for hydrogen environment material performance test device |
| CN106404539A (en) * | 2016-11-15 | 2017-02-15 | 北方工业大学 | Test method for realizing uniform unidirectional stretching |
| CN107167377A (en) * | 2017-05-03 | 2017-09-15 | 河海大学 | A kind of utilization direct shear apparatus determines the device and method of soil body tensile strength |
| CN107727505A (en) * | 2017-09-15 | 2018-02-23 | 武汉钢铁有限公司 | A kind of plane strain extension (PSE) method |
| CN107935483A (en) * | 2017-10-12 | 2018-04-20 | 石河子大学 | A kind of bulk cotton stalk regeneration concrete brick and preparation method thereof and former |
| CN207300697U (en) * | 2017-10-23 | 2018-05-01 | 青岛科技大学 | A kind of dismountable rock soil test piece compaction apparatus |
| CN108633695A (en) * | 2018-02-13 | 2018-10-12 | 湖南农业大学 | A kind of plasticity fiber compost preparation process |
| CN210243377U (en) * | 2019-04-18 | 2020-04-03 | 防灾科技学院 | Aeolian sand modified soil tensile strength testing device |
-
2019
- 2019-04-18 CN CN201910311635.6A patent/CN110274830A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614638A (en) * | 2009-07-10 | 2009-12-30 | 清华大学 | A kind of horizontal triaxial tension and compression tester |
| CN102901669A (en) * | 2012-08-23 | 2013-01-30 | 苏州南智传感科技有限公司 | 8-analogue-shaped soil uniaxial tensile tester |
| CN103674723A (en) * | 2013-12-04 | 2014-03-26 | 西北农林科技大学 | Test method for determining uniaxial tensile strength of soil mass |
| CN103954512A (en) * | 2014-05-23 | 2014-07-30 | 上海核工程研究设计院 | Device and method for testing breaking tenacity of compact tension specimen in low-temperature environment |
| CN104062180A (en) * | 2014-06-06 | 2014-09-24 | 河海大学 | Experiment device and method for testing uniaxial drawing property of soil body |
| CN104062173A (en) * | 2014-06-24 | 2014-09-24 | 北京交通大学 | Soil tensile strength testing apparatus |
| CN204255718U (en) * | 2014-11-20 | 2015-04-08 | 中国人民解放军后勤工程学院 | A kind of semi-automatic multifunction soil test pressure-like machine |
| CN204269475U (en) * | 2014-11-28 | 2015-04-15 | 中国科学院寒区旱区环境与工程研究所 | Tensile Strength of Frozen Soil proving installation |
| CN104931349A (en) * | 2015-06-10 | 2015-09-23 | 合肥通用机械研究院 | Seal friction compensation method for hydrogen environment material performance test device |
| CN106404539A (en) * | 2016-11-15 | 2017-02-15 | 北方工业大学 | Test method for realizing uniform unidirectional stretching |
| CN107167377A (en) * | 2017-05-03 | 2017-09-15 | 河海大学 | A kind of utilization direct shear apparatus determines the device and method of soil body tensile strength |
| CN107727505A (en) * | 2017-09-15 | 2018-02-23 | 武汉钢铁有限公司 | A kind of plane strain extension (PSE) method |
| CN107935483A (en) * | 2017-10-12 | 2018-04-20 | 石河子大学 | A kind of bulk cotton stalk regeneration concrete brick and preparation method thereof and former |
| CN207300697U (en) * | 2017-10-23 | 2018-05-01 | 青岛科技大学 | A kind of dismountable rock soil test piece compaction apparatus |
| CN108633695A (en) * | 2018-02-13 | 2018-10-12 | 湖南农业大学 | A kind of plasticity fiber compost preparation process |
| CN210243377U (en) * | 2019-04-18 | 2020-04-03 | 防灾科技学院 | Aeolian sand modified soil tensile strength testing device |
Non-Patent Citations (4)
| Title |
|---|
| PRATEEK JINDAL等: "Effect of pore-water surface tension on tensile strength of unsaturated sand", INDIAN GEOTECHNICAL JOURNA, 17 February 2016 (2016-02-17) * |
| SURENDRA BAHADUR TAMRAKAR等: "Measurement of soil tensile strength and factors affecting its measurements", SOILD AND FOUNDATIONS, vol. 5, no. 47, 31 October 2007 (2007-10-31) * |
| 李昊达;唐朝生;徐其良;刘昌黎;冷挺;施斌;: "土体抗拉强度试验研究方法的进展", 岩土力学, no. 2, 10 October 2016 (2016-10-10) * |
| 李晓军等: "路基填土抗拉强度测定的实验研究", 西安公路交通大学学报, vol. 20, no. 2, 30 June 2000 (2000-06-30) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203634A (en) * | 2021-04-23 | 2021-08-03 | 防灾科技学院 | Intelligent maintenance and temperature and humidity control loading test system for aeolian sand modified soil |
| CN113533686A (en) * | 2021-06-28 | 2021-10-22 | 中铁时代建筑设计院有限公司 | Liquid plastic limit automation equipment for measuring soil |
| CN113533686B (en) * | 2021-06-28 | 2023-11-28 | 中铁时代建筑设计院有限公司 | Automatic equipment for determining liquid plastic limit of soil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Airey et al. | An evaluation of direct simple shear tests on clay | |
| US4854175A (en) | Simple shear device for testing earthen materials and powders | |
| CN106442112A (en) | Rock beam sample cantilever type bending test device | |
| CN110274830A (en) | A kind of drift-sand Modified soil tensile characteristics test macro | |
| CN109238376A (en) | A kind of device and method monitoring steam-cured cement-based material in the process deformation and stress | |
| CN103983516A (en) | Device and method for measuring and calculating poisson ratio of soil body | |
| CN103174122A (en) | Lateral stress pore pressure probe used for testing soil static lateral pressure coefficient | |
| CN105223095A (en) | A kind of textile or fibre compression resilience and eider down fluffy degree fully-automated synthesis instrument | |
| CN104931352B (en) | A kind of method of testing of concrete Poisson's ratio | |
| CN111751276A (en) | Loading device and method for bonding performance test of reinforcement and confined concrete | |
| CN117388082B (en) | Forward-pulling type tunnel anchor indoor test model and test method | |
| CN106018094A (en) | Concrete temperature stress testing machine and creep testing method | |
| CN107037075A (en) | One kind expansion grout material solidification process expansion system safety testing device and method of testing | |
| Wang et al. | Relationship between grain crushing and excess pore pressure generation by sandy soils in ring-shear tests | |
| CN210243377U (en) | Aeolian sand modified soil tensile strength testing device | |
| CN108645712A (en) | Geosynthetics tensile test apparatus based on soil medium | |
| CN205691418U (en) | The relaxation device when compression of thin stephanoporate elastomeric material is long | |
| CN109403392B (en) | System and method for measuring and calculating horizontal counter force coefficient of soil body | |
| CN106338249A (en) | Centrifuge vibration displacement field integrated test acquisition system and displacement measurement method | |
| CN106351267A (en) | Pile foundation bearing characteristic model testing device under down-pressing static load effect | |
| CN106526147B (en) | A kind of device and method that the expansion character measuring mortar or concrete under the conditions of vertical half soaks measures | |
| CN205941200U (en) | Concrete temperature stress testing machine | |
| CN210626226U (en) | Testing device for non-drainage shear strength and pore water pressure of soft clay | |
| CN112880549A (en) | Axial and radial integrated triaxial extensometer | |
| CN208399239U (en) | A kind of vertical vibration compaction test apparatus of measurable height of specimen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |