CN105891108B - A kind of test device of intergrain bond thing cutting performance and method of testing - Google Patents
A kind of test device of intergrain bond thing cutting performance and method of testing Download PDFInfo
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- CN105891108B CN105891108B CN201610184811.0A CN201610184811A CN105891108B CN 105891108 B CN105891108 B CN 105891108B CN 201610184811 A CN201610184811 A CN 201610184811A CN 105891108 B CN105891108 B CN 105891108B
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- fixed block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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Abstract
The invention discloses a kind of test device of intergrain bond thing cutting performance and method of testing, wherein test device includes test platform, the fixed block and sliding shoe being connected with a model ball respectively is provided with test platform, the lower end of test platform is provided with a hinged support and makes the Motorized lift device that test platform swings around hinged support, and sliding shoe is arranged on the upper end of fixed block the adhesive property slided on fixed block in the presence of Motorized lift device for test between two model ball on fixed block and sliding shoe；A concave mirror is additionally provided with sliding shoe, is used for obtaining the optical inductor of light that the line source sends through the concave mirror back reflection light a line source and is just arranged to the position of the concave mirror.Apparatus of the present invention are simple, it is easy to operate, and result of the test is more accurate, preferably can be applied in the adhesion test at interface.
Description
Technical field
The present invention relates to a kind of test device and test device, specifically a kind of test device of interfacial bond property and survey
Method for testing.
Background technology
So far, the test in terms of numerous scholars simply carry out mechanical property to the cementing whole soil body for completing, but rock
Soil is made up of many microscopic particles, and the filler adhesion strength between particle and particle is also effectively studied.Jiang Ming
Mirror etc. simplifies the cementing mechanical model of microcosmic and proposes the method for testing of each parameter in model, in order to study cement gel between particle
Knot thing mechanical property, cement particle is simulated using two aluminium bars by its team, by the use of cement and epoxy resin as cementing material,
Then carry out stretching, compress, a series of load tests detection cementing strength such as compression shear, pressure are turned round, subsequently under different cementing thickness
Cementing strength rule studied, in order to verify cementing adhesion strength between sand particle further, it is possible to use its research
The particle contact force characteristic test device that team develops is simulated test.Cementing for microcosmic mechanical model is incorporated into discrete element
Program, so as to simulate mechanical characteristic and Analysis on Mechanism of the soil body from cement under different loading environments, sets up the cementing of the soil body
Constitutive model.Jiang Mingjing (Jiang Mingjing, Xiao Yu, Sun Yugang, Wu Xiaofeng. the Micromechanics model test [J] of cementing particle.
Rock-soil mechanics, 2012,33 (5):1293-1299) adhesion problem of particle is simplified to plane problem, bonding force is amplified, just
In the applying of power and the test of displacement.Due to by bar-shaped replacement spheroid, thus there is certain error with actual situation.
Hai(Hai L,Muhannad T S,Jeffery H,Derick G B.Measurement of Bonding
Strength between Glass Beads Treated by Microbial-Induced Calcite
Precipitation(MICP)[J].Geotechnical Special Publication,2014(234):1625-1634.)
Sand grains are simulated Deng the glass pellet using a diameter of 3mm, two beads are connected to above precision bearing platform, wherein one
Bead is connected to the stabilized platform with hard muscle, and another is connected to the moveable platform with deflection optical fiber, by integral installation
Put in microorganism grouting solution, as shown in Figure 2.Optical fiber is driven to deflect so as to between two glass marbles by mobile platform
Apply pulling force, this design device assesses the bond between simulation sand particle well, however it is necessary that surveying using accurate displacement
Examination and micro- power bringing device.The testing program indirectly calculates the power of applying by applying small displacement, and this power has
A lot of influence factors, such as fiber size is less, the error that meeting up-sizing is brought when calculating optical fiber resistance moment, Er Qiewei
The precision of test is moved, the reliability of result of the test can be all affected, and tests the high-precision micro-displacement actuator of needs.
Content of the invention
The technical problem to be solved is the deficiency existed for above-mentioned prior art, and provides a kind of test knot
Structure is simple, convenient test and testing precision are high shearing performance test device and method of testing.
For solving above-mentioned technical problem, the technical solution used in the present invention is：
A kind of test device of intergrain bond thing cutting performance, including test platform, is arranged on the test platform
There is the fixed block and sliding shoe being connected with a model ball respectively, the lower end of the test platform is provided with a hinged support and one
The Motorized lift device for making the test platform swing around the hinged support, the sliding shoe are arranged on the upper of the fixed block
End is simultaneously slided for test in the presence of the Motorized lift device positioned at fixed block and sliding shoe on the fixed block
Adhesive property between two model ball；It is characterized in that：A concave mirror is additionally provided with the sliding shoe, just to the concave surface
The position of mirror arranges a line source and is used for obtaining the light sensation of light that the line source sends through the concave mirror back reflection light
Answer device；The lowering or hoisting gear enters the sensed position for setting and controls the lifting according to the optical inductor according to the reflected light
Device lifting or the height of reduction.
The optical inductor is screen or sensed data processing terminal；The line source is laser.
Slip case and fixing case is provided with the test platform, and the sliding shoe is arranged on the slip case
Interior, the fixed block is arranged in the fixing case, and the slip case is located at the fixing case upper end, in the fixation
A cavity is formed between case and mobile case, the model ball on the fixed block and sliding shoe is located in the cavity,
Be communicated with the cavity pour passage for the note of cement is formed between two model ball.
A fixed mount is fixed with the test platform, and the fixed block is adjustable installed in institute by fixed block bolt
State on test platform, the fixing case is adjustable on the fixed mount by adjusting handle.
Ball is provided between the fixed block and fixing case.
A kind of method of test intergrain bond thing cutting performance, it is characterised in that step is：
Step one, the sliding shoe and fixed block that are formed with cement are placed on horizontal test platform, will be fixing
Block is fixed with test platform；
Step 2, determined according to the thickness of cement cement destroy when sliding shoe slide distance, and according to this away from
From the sensed position for determining that optical inductor sets；
Step 3, by Motorized lift device progressively lifting test platform one end, when reflected light reaches sensed position, stop
Only lifting test platform, obtains the angle of inclination of test platform；
Step 4, the angle of inclination obtained according to step 3 calculate cohesive force when shearing：
F=Gsin θ-μ Gcos θ
Wherein, cohesive force when F is sheared for particle, f are the frictional force between sliding shoe and fixed block, and G is sliding shoe
Weight, μ are coefficient of friction.
The distance that sliding shoe slides when the cement is destroyed is the 5～8% of the model radius of a ball.
Compared with prior art, apparatus of the present invention are simple, it is easy to operate, and result of the test is more accurate, preferably can apply
In the adhesion test at interface, sliding shoe be located at fixed block upper end, by the weight of fixed block itself can imposed load in mould
Between ball, the cutting performance that more really can reflect under particles' interaction, more it is consistent with actual, test result more has pin
To property and applicability.
Description of the drawings
Fig. 1 is the structural representation of test device of the present invention；
Fig. 2 is test device shearing test state diagram of the present invention；
Fig. 3 is concave mirror displacement measurement schematic diagram.
Wherein：1st, test platform；2nd, sliding shoe；21st, slip case；3rd, fixed block；31st, fixing case；32nd, sliding surface；
33rd, baffle plate；4th, fixed mount；5th, handle is adjusted；6th, ball；7th, grout outlet；8th, grouting port；9th, model ball；10th, concave mirror；11st, cut with scissors
Connect fulcrum；12nd, lowering or hoisting gear；13rd, cement；14th, line source；15th, optical inductor.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is elaborated：
As shown in figure 1, test device of the present invention includes：
Module of two length of sides for 30mm*50mm*30mm is made, one is sliding shoe 2, one is fixed block 3, wherein solid
Determine block 3 to be fixed on rigid test platform 1, sliding shoe 2 by guide rails assembling on fixed block 3 and can on fixed block with respect to
Slide.2-3mm diameter silicon grain ball is chosen as the model ball 9 of simulation soil particle, model ball 9 is connected with two modules respectively
Connect.The hinged one end in 1 one end of test platform is shelved on displacement Motorized lift device 12.A concave surface is also equipped with sliding shoe 2
Mirror 10, is just arranging a line source 14 and one to be used for obtaining the light that line source sends anti-after concave mirror to the position of the concave mirror
Penetrate the optical inductor 15 of light.
In order to cement and model ball are molded on test platform, sliding shoe 2 and fixed block 3 are individually positioned in a slip
In case 21 and fixing case 31, slip case 21 is slided on fixing case by being arranged on the guide rail on fixing case 31,
It is additionally provided with for spacing baffle plate 33 on fixing case, prevents slip case from falling when sliding.Fixing case 31 and survey
Fixed mount 4 on examination platform is connected by adjusting handle 5, for the ease of adjusting the thickness of cement between fixed block and sliding shoe
Degree, fixed block are adjustable on test platform and can be in slip in fixing case 31, sliding interface by fixed block bolt
It is provided with the ball 6 for reducing friction.One is enclosed with for noting in the casing structure being made up of slip case 21 and fixing case 31
The cavity of slurry, connected with the cavity have grouting port 8 and grout outlet 7.
First passing through grouting port before testing experiment carries out slip casting, treat slip casting and cementing complete after carry out interfacial bond property examination
Test.Slip casting is carried out using relevant bacteria species (as Bacillus pasteurii) to sample.
Shearing test：
A kind of method of test intergrain bond thing cutting performance, step is：
Step one, the sliding shoe and fixed block that are formed with cement are placed on horizontal test platform, will be fixing
Block is fixed with test platform；
Step 2, determined according to the thickness of cement cement destroy when sliding shoe slide distance, and according to this away from
From the sensed position for determining that optical inductor sets；
Step 3, by Motorized lift device progressively lifting test platform one end, when reflected light reaches sensed position, stop
Only lifting test platform, obtains the angle of inclination of test platform；
Step 4, the angle of inclination obtained according to step 3 calculate cohesive force when shearing：
F=G sin θ-μ G cos θ
Wherein, cohesive force when F is sheared for particle, f are the frictional force between sliding shoe and fixed block, and G is sliding shoe
Weight, μ are coefficient of friction.
Claims (7)
1. a kind of test device of intergrain bond thing cutting performance, including test platform, is provided with the test platform
The fixed block being connected with a model ball respectively and sliding shoe, the lower end of the test platform is provided with a hinged support and to be made
The Motorized lift device that the test platform is swung around the hinged support, the sliding shoe are arranged on the upper end of the fixed block
And slide on the fixed block in the presence of the Motorized lift device for testing positioned on fixed block and sliding shoe two
Adhesive property between model ball；It is characterized in that：A concave mirror is additionally provided with the sliding shoe, just to the concave mirror
Position one line source and be set be used for obtaining the photoinduction of light that the line source sends through the concave mirror back reflection light
Device；The lowering or hoisting gear enters the sensed position control for the setting lifting dress according to the optical inductor according to the reflected light
Put the height of lifting or reduction.
2. test device according to claim 1, it is characterised in that：The optical inductor is that screen or sensed data are processed
Terminal；The line source is laser.
3. test device according to claim 1 and 2, it is characterised in that：Sliding closure is provided with the test platform
Shell and fixing case, the sliding shoe are arranged in the slip case, and the fixed block is arranged in the fixing case, institute
State slip case and the fixing case upper end is located at, between the fixing case and mobile case, a cavity is formed with, described
Model ball on fixed block and sliding shoe is located in the cavity, is communicated with for being formed between two model ball in the cavity
The note of cement pours passage.
4. test device according to claim 3, it is characterised in that：A fixed mount is fixed with the test platform,
The fixed block is adjustable on the test platform by fixed block bolt, and the fixing case can by adjusting handle
Adjust on the fixed mount.
5. test device according to claim 4, it is characterised in that：It is provided between the fixed block and fixing case
Ball.
6. a kind of based on described in claim 1 test device test intergrain bond thing cutting performance method, it is characterised in that
Step is：
Step one, the sliding shoe and fixed block that are formed with cement are placed on horizontal test platform, by fixed block with
Test platform is fixed；
Step 2, the distance that sliding shoe slides when determining that according to the thickness of cement cement is destroyed, and according to this distance really
Determine the sensed position of optical inductor setting；
Step 3, by Motorized lift device progressively lifting test platform one end, when reflected light reaches sensed position, stop lift
Test platform is risen, obtains the angle of inclination of test platform；
Step 4, the angle of inclination obtained according to step 3 calculate cohesive force when shearing：
Fl=G sin θ-μ G cos θ
Wherein, FlCohesive force when shearing for particle, f are the frictional force between sliding shoe and fixed block, and G is the weight of sliding shoe,
μ is coefficient of friction.
7. method according to claim 6, it is characterised in that：The distance that sliding shoe slides when the cement is destroyed is institute
State the 5～8% of the model radius of a ball.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610184811.0A CN105891108B (en) | 2016-03-28 | 2016-03-28 | A kind of test device of intergrain bond thing cutting performance and method of testing |
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| CN201610184811.0A CN105891108B (en) | 2016-03-28 | 2016-03-28 | A kind of test device of intergrain bond thing cutting performance and method of testing |
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| CN105891108B true CN105891108B (en) | 2017-03-08 |
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| CN106813977B (en) * | 2017-01-18 | 2019-05-17 | 浙江科技学院（浙江中德科技促进中心） | Carefully see strain gauge means and measurement method in the cementing area of sand particle nanogel |
| CN106814031B (en) * | 2017-01-18 | 2019-03-19 | 浙江科技学院（浙江中德科技促进中心） | The cementing shearing of sand particle nanogel and bending strength test device and its method |
| CN106840921B (en) * | 2017-01-23 | 2019-04-05 | 浙江科技学院（浙江中德科技促进中心） | The cementing area's torsional strength of sand particle nanogel and shearing strain test device and method |
| CN111551407A (en) * | 2020-04-14 | 2020-08-18 | 清华大学 | Cementing double-spherical particle material and preparation method thereof |
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| JP2002131204A (en) * | 2000-10-27 | 2002-05-09 | Yamaguchi Technology Licensing Organization Ltd | Simplified-type field shearing testing method and device |
| CN101393093B (en) * | 2007-09-19 | 2011-04-06 | 同济大学 | Cementing granule contact anti-shearing and torsion resistant test device |
| CN101666720B (en) * | 2009-09-08 | 2011-05-11 | 清华大学 | Scouring model experimental device of underground silt and method |
| CN104007025A (en) * | 2014-05-08 | 2014-08-27 | 河海大学 | Multifunctional tilt table device used for testing interfacial shear strength characteristics of geotechnical synthetic material |
| CN104614258B (en) * | 2015-01-22 | 2017-11-07 | 同济大学 | Hemispherical ideal cementing granule contact anti-shearing, bending resistance, torsion resistant test device |
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Non-Patent Citations (1)
| Title |
|---|
| Measurement of Bonding Strength between Glass Beads Treated by Microbial-Induced Calcite Precipitation(MICP);Hai Lin etal.;《Geotechnical Special Publication》;20141231(第234期);1625-1634 * |
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