CN108225918A - Large-scale metaling-rock contact face rheological experiments instrument and its application method - Google Patents
Large-scale metaling-rock contact face rheological experiments instrument and its application method Download PDFInfo
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- CN108225918A CN108225918A CN201810088828.5A CN201810088828A CN108225918A CN 108225918 A CN108225918 A CN 108225918A CN 201810088828 A CN201810088828 A CN 201810088828A CN 108225918 A CN108225918 A CN 108225918A
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- 238000002474 experimental method Methods 0.000 title claims abstract description 22
- 239000011435 rock Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010008 shearing Methods 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000005336 cracking Methods 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims description 35
- 238000006073 displacement reaction Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 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 description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000010295 mobile communication Methods 0.000 claims 1
- 230000007306 turnover Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 9
- 239000002689 soil Substances 0.000 description 9
- 230000007774 longterm Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Classifications
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- 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
-
- 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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of large-scale metaling rock contact face rheological experiments instrument and its application methods.The tester includes direct shear box, vertical load lever and horizontal loading lever with upper box and lower box and shearing seam.The vertical load lever and horizontal loading lever are loaded using mechanical system；In the rigid adjusting block of place's setting adjustable position of cracking of the shearing seam；The upper box of the direct shear box is configured with box movement retainer；The direct shear box is configured with roller assembly；The horizontal loading lever and vertical load lever are each equipped with lever Balame regulating device.
Description
Technical field
The invention belongs to civil engineering technical field of measurement and test, are related to rheometer test technology more particularly to a kind of large-scale rubble
Material-rock contact face rheological experiments instrument and its application method.
Background technology
With the fast development of China western mountainous areas infrastructure construction, high fill foundation is increasing, after permanent worker
Sedimentation is directly related to the normal use for building the facilities such as highway, railway and airport thereon.And high fill foundation work
The forecast analysis of journey sedimentation is very difficult, this needs is considered inside the metaling-rock contact interface filled and metaling
Long-term shear creep characteristic.The tester can provide corresponding result of the test, to research have important theory significance and
Engineering practical value.
Existing Large Shear device be mostly motor loading or hydraulic-servo-load, provide normal direction (vertical) and tangentially
(level) power.These load modes have at 2 points, first, in experimentation, load can change, and need timely
Adjust load, it is difficult to ensure that load is steady in a long-term；Second is that power consumption is needed, once occur the loss of power accident during the experiment,
Experiment fails, this experiment short on the duration influences less, but is very big to the experiment of duration length (being up to the several months)
Threat.Therefore there is presently no metaling-rock contact face shear creep laboratory apparatus, only study contact surface and load in short term
The instrument of mechanical characteristic.
Traditional small-sized soil test equipment (such as consolidation apparatus) is loaded using mechanical system, and load is stablized, but specimen size
It is usually smaller, available for the experiment of the materials such as clay, sand, but the test requirements document of coarse granule material can not be met.
Box and lower box stay the seam size to fix on existing instrument, the fair-sized and the particle of material therefor actually stitched
Diameter is related, and fixed size can not adapt to different types of material.
Shear box is also easy to produce rotation under the action of shearing force, and upper box in shear history is caused to be contacted with lower box, influences boundary
Face stress reduces test accuracy.
Invention content
The present invention provides a kind of large-scale metaling-rock contact face rheological experiments instrument and its application methods.
On the one hand, large-scale metaling-rock contact face rheological experiments instrument provided by the invention, including：
Direct shear box is arranged on pedestal, including upper box and lower box, wherein the upper box includes upper box head cover, it is described
There is shearing seam between upper box and lower box；
Vertical load lever is configured to amplified power using the weight of vertical load counterweight by vertically loading
Head is vertically applied to the upper box head cover of the direct shear box；
Horizontal loading lever is configured to that amplified power is passed through pulley transverse direction using the weight of horizontal loading counterweight
The lower box of the direct shear box is applied to, so as to apply horizontal shear force；
Wherein, the vertical load and horizontal loading are loaded using mechanical system.
In one embodiment of the invention, it is adjusted in the rigidity of place's setting adjustable position of cracking of the shearing seam
Block, to adjust the size cracked.
In one embodiment, the upper box of the direct shear box is configured with box movement retainer, for preventing on described
Box is overturn.
In one embodiment, the direct shear box is configured with roller assembly, for upper box is controlled not overturn and is prevented
Upper box and the contact of lower box.
In one embodiment, the horizontal loading lever and vertical load lever are each equipped with lever balancing dress
It puts, for ensureing the accurate of load and position.
In one embodiment, the tester may also include horizontal force snesor, with the horizontal loading respectively
Lever connection is used for read level pulling force size.
In one embodiment, the direct shear box is also configured with sink, so as to be used for when test needs with water filling
Humidifying is carried out to test specimen.
In one embodiment, the vertical load lever and the horizontal loading lever are set as respectively so that vertical
All it is by 1 with horizontal loading:24 lever amplification, is then re-applied on sample.
On the other hand, the user of the large-scale metaling-rock contact face rheological experiments instrument provided by the invention
Method, including：
Slabstone in the lower box of direct shear box after installation processing, wherein the position of the slabstone can be by the lower box
Backing plate is finely tuned；
The upper box of direct shear box is installed, wherein moving up and down adjustable plate so as to be determined according to granular size using adjusting bolt
Slit width degree is stayed, then places upper box horizontal displacement fixed block；
Rubble, which is put into, into the upper box prepares sample；
Counterweight is added on toward vertical load lever, applies vertical pressure；
After vertical pressure applies and stablizes, box horizontal displacement fixed block in taking-up, then toward adding on horizontal loading lever
Counterweight applies horizontal pull, slides the lower box and shear sample.
A kind of embodiment according to the present invention, the method can further include：
The vertical pressure size is asked by the counterweight weight and lever amplification coefficient added on the vertical load lever
, the horizontal pull size is read by horizontal force snesor；
The vertical displacement of the lower box can be read vertical loading head by dial gauge and move down distance acquisition, the lower box
Horizontal displacement pass through dial gauge and read lower box displacement distance and obtain；
When test specimen deforms under load and causes horizontal loading lever that excessive inclination occurs, pass through Balame regulating device
The position of horizontal loading lever is made to be adjusted to horizontality, so as to ensure that the accurate of load and position.
A kind of embodiment according to the present invention, the method further includes：It is used when test is needed to sink water filling
To carry out humidifying to test specimen.
Description of the drawings
Figure 1A -1C are respectively to illustrate large-scale metaling-rock contact surface current of the description according to one embodiment of the present invention
Become front view, vertical view and the left view of attribute testing instrument.
Fig. 2A and 2B is respectively to illustrate soil (or gravelly soil)-rock contact face of the description according to one embodiment of the present invention
The front view and left view of the direct shear box of rheological test.
Specific embodiment
With reference to embodiment and attached drawing is further explained explanation to invention process, the principle of the present invention.It should
When understanding, the invention is not limited in following specific embodiments in relation to inventing.It is it is also to be understood that used herein
Term be only intended to for specific embodiment be described rather than for this application claims range limit
System.
Here, according to certain embodiments of the present invention to contacting the apparatus of interfacial test and its feature and operation side
Method is compared detailed description.
1. test apparatus
1), apparatus structure
As shown in figs. 1A-1 c, the large-scale metaling of the present embodiment-rock contact face rheological experiments instrument includes：
Direct shear box 110 is arranged on pedestal 120, including upper box 112 and lower box 113, wherein the upper box 112 wraps
Box head cover is included, there is shearing seam 115 between the upper box 112 and lower box 113；
Vertical load lever 130 is configured to pass through amplified power using the weight of vertical load counterweight 132 perpendicular
The upper box head cover 114 of the direct shear box 110 is vertically applied to loading head 133；
Horizontal loading lever 140 is configured to that amplified power is passed through cunning using the weight of horizontal loading counterweight 142
Wheel 144 is applied laterally into the lower box 113 of the direct shear box 110, so as to apply horizontal shear force；
Wherein, the vertical load lever 130 and horizontal loading lever 140 are loaded using mechanical system.
As seen in figs. 2a-2b, the rigid adjusting block 116 of adjustable position is set at the place of cracking of the shearing seam 115, with
Just the size cracked is adjusted.
Preferably, the configurable upper box movement retainer 115 of the upper box 112 of the direct shear box 110, for preventing the upper box
Overturning.
Preferably, the direct shear box 110 is configured with roller assembly 160, for upper box 112 is controlled not overturn and is prevented
Box 112 and lower box 113 contact.
Preferably, the horizontal loading lever 140 is configured with lever Balame regulating device 146, for ensure load and
Position it is accurate.
Preferably, the tester may also include horizontal force snesor 147, with the horizontal loading lever 140 respectively
Connection is used for read level pulling force size.The horizontal force snesor 147 could be provided as can be with connecting the upper box 112
Top component 118 contact.
The direct shear box is also configured with sink 119, so as to be used for carrying out humidifying to test specimen with water filling when test needs.
Preferably, the vertical load lever 130 and the horizontal loading lever 140 are set as respectively so that vertical and water
Flat load is all by 1:24 lever amplification, is then re-applied on sample.
2) experimental design
Native (or gravelly soil)-rock contact face rheological test
Interfacial test mode：Design specialized shear box, slabstone is under, soil is in upper mode.The effective height of upper box-packed sample
For 10cm.Cannot be substantially flat in view of slabstone upper and lower surface used in experiment, placing the lower box of slabstone should allow some leeway, if
The height for putting lower box is 100mm, and the backing plate that slabstone position is adjusted in lower box can be finely tuned suitably.In lower box sliding process, slabstone
Remain constant with the contact area of soil.
Fig. 2A, 2B show slabstone in one embodiment of the invention and the shear creep of soil body material designs just
View and left view show that the shearing occurred after being acted in the creep test of slabstone and soil body material by horizontal shear force is compacted
Become.
The interior length of the down cut box of fixed slabstone is more than upper box 45mm.
Soil-slabstone interface directly stays gap, and crack width 10mm.Upper box stays seam 10mm, using adjusting bolt, makes adjusting
Plate moves up and down, and adjusts the size of cracking of 2-10mm.Fixation of the place there are 10mm thickness of cracking during sample preparation between upper box and slabstone
Block takes out fixed block before shearing.
The requirement of " interface humidifying " can be met, water is added to make soil saturation at soil-rock interface.Design is higher than the Sheng of upper shear box
Water box ensure the shearing entire humidifying of sample, discharge outlet are set at shear surface.
Soil-rock contact interview can carry out wetting-drying test in testing.Upper box air inlet needs to use 704 silicone rubber seals
The seam crossing of pressure transmission plate and upper shear box is passed through dry air and enters sample, and gas outlet is selected on shear surface.
2. technical indicator
In a kind of specific embodiment, the technical indicator of the interface shearing creep test includes：
1), specimen size in shear box：200*200mm；
2), rock board size：Wide 20cm, long 24cm；Upper box specimen height 10cm；
3), vertical maximum pressure：60kN；
4), horizontal maximum shear stress：60kN；
5), horizontal maximum displacement：40mm；
6), lever ratio：1：24, lever Balame regulating device is set；
7), instrument apparent size：2200mm (length) * 500mm (width) * 1360mm (height)
3. test features
According to the embodiment of the present invention, the large-scale metaling-rock contact face rheological experiments instrument and its use
Method is embodied includes but not limited to following feature and advantage relative to the prior art.
A. the vertical and horizontal loading of the tester is all loaded using mechanical system, so as to ensure load
Steadily in the long term, traditional experiment instrument is in addition also avoided because power-off causes the accident of test failure to occur.
B. the experiment size of the tester is 200*200mm, and particle maximum particle diameter is 20mm, so as to meet thick
The test requirements document of grain sample.
C. it in the direct shear box of the tester, in the Stiff Block of place's setting adjustable position that cracks, cracks to adjust
Size enables adaptation to the experiment of different kinds material sample.
D. the tester has used roller assembly, so as to which upper box is controlled not overturn, and prevents box contact up and down.
4. test operation
According to the embodiment of the present invention, below to the large-scale metaling-rock contact face rheological experiments instrument
Using being described.
In some embodiments, it in order to ensure the steady in a long-term of load, is loaded in the present apparatus using mechanical system.
See the front view, vertical view and left view of the tester shown in 1A, 1B, 1C.As shown in Figure 1A, left side is the thick stick for adding vertical load
Bar 130 is added to 1112 head cover of upper box of direct shear box 110 after amplifying load；Right side is filled for horizontal loading lever 130 and pulley 144
It puts, the weight of counterweight 132 is amplified by horizontal loading lever 130, is then changed direction by pulley 140, is drawn direct shear box to the right
110 lower box 113 applies horizontal shear force.
In order to meet the test requirements document of coarse granule material, present apparatus specimen size is 200*200mm, therefore required load
It is very big.This requires the counterweight weight and lever multiple that use are all higher.To meet the requirement of load magnitude, vertical and horizontal loading
All pass through 1:24 lever amplification, is then re-applied on sample.Horizontal loading lever 140 is as shown in Figure 1A, to ensure load
Size and location it is accurate, there is provided lever Balame regulating devices 146.
In order to enable the shearing seam of box adapts to different types of material up and down, the shearing seam 115 in direct shear box 110 is opened
The rigid adjusting block 116 of one adjustable position at seam is set, cracks size as shown in 2A to adjust.
Upper box 112 is overturn in order to prevent, prevents box 112 from being contacted with lower box 113, one kind has been used in shear box 110
Roller assembly 160, as shown in Figure 1A and Fig. 2A.
In some embodiments, as shown in figs. 1A-1 c, the meter unit of the tester includes parallel bars shown in figure
Bar, i.e. vertical load lever 130 and horizontal loading lever 140.Left side lever is vertical load lever 130, by amplified power
It is applied to the head cover of the upper box 112 of direct shear box 110.Right side lever is horizontal loading lever 140, by one group of pulley, will be amplified
Power afterwards is applied to the lower box 113 of direct shear box 110.It can see by Fig. 1 C, to ensure accurate, the setting of load and position
Lever Balame regulating device 146 can be used for adjusting the horizontal position of horizontal loading lever.
According to preferred embodiment, the mobile retainer 115 (as shown in Figure 2 B) of conjunction is devised in direct shear box,
It is to prevent box 112 from overturning.In addition to the gap between upper and lower box can be adjusted, there is provided rigidity as shown in Figure 2 A to be adjusted
Block 116.
Mode is applied in some implementations operated according to related tester, is first installed in box 113 under the shearing shown in Fig. 2A -2B
Slabstone after processing, the position of slabstone can be finely tuned by the backing plate in lower box 113.Slabstone is after installation is complete, then installation shearing
The upper box 112 of box, using adjusting bolt, moves up and down adjustable plate, and slit width is stayed according to granular size decision shearing seam 115
Degree, and place upper box horizontal displacement fixed block 117.Up rubble is put into box 112 and prepares sample, by 119 water filling of sink
To achieve the purpose that soak test specimen (ignoring this step if the dry sample of research).After abundant humidifying, pass through past vertical load thick stick
Vertical load counterweight 132 is added on bar 130, applies vertical pressure.After vertical force apply stablize after, in taking-up box horizontal displacement consolidate
Determine block, toward horizontal loading lever 140 on pitch-based sphere load counterweight 142, apply horizontal pull, lower box 113 is made to slide and shear
Sample.In experiment, vertical pressure size is acquired by 132 weight of vertical load counterweight and lever amplification coefficient, and horizontal pull is big
It is small to be read by horizontal force snesor 147.The vertical displacement of the lower box 113 can read vertical loading head 133 by dial gauge
It moves down distance to obtain, the horizontal displacement of the lower box 113 is read lower box displacement distance by dial gauge and obtained.When test specimen exists
It deforms under load, when causing to load the lever excessive inclination of generation, can be lived by shaking the handle of Balame regulating device 146
Plug pushes, and the position of lever is made to be adjusted to horizontality, so as to ensure that the accurate of load and position.
Specific description is carried out, and one is provided for illustration purpose above for some preferred embodiments
A little technical details.However those skilled in the art should be understood that the present invention can have various variations and it is more not
Same embodiment, and details described herein can have spirit and master of the comparable variation without departing from the present invention
Purport, so as to which the application range claimed should be belonged to.
Claims (11)
1. a kind of large size metaling-rock contact face rheological experiments instrument, including：
Direct shear box is arranged on pedestal, including upper box and lower box, wherein the upper box includes upper box head cover, the upper box
There is shearing seam between lower box；
Vertical load lever is configured to erect amplified power by vertical loading head using the weight of vertical load counterweight
To the upper box head cover for being applied to the direct shear box；
Horizontal loading lever is configured to be laterally applied to amplified power by pulley using the weight of horizontal loading counterweight
To the lower box of the direct shear box, so as to apply horizontal shear force；
Wherein, the vertical load lever and horizontal loading lever are loaded using mechanical system.
2. tester according to claim 1, wherein the rigidity of place's setting adjustable position of cracking in the shearing seam
Adjusting block, to adjust the size cracked.
3. tester according to claim 1 wherein the upper box of the direct shear box is configured with box movement retainer, is used for
Prevent the upper box overturning.
4. tester according to claim 1, wherein the direct shear box is configured with roller assembly, for upper box is controlled not turn over
Turn and prevent box and lower box from contacting.
5. tester according to claim 1, wherein the horizontal loading lever and the vertical load lever are configured
There is lever Balame regulating device, for ensureing the accurate of load and position.
6. tester according to claim 1, wherein horizontal force snesor is may also include, with the horizontal loading respectively
Lever connection is used for read level pulling force size.
7. tester according to claim 1, wherein the direct shear box is also configured with sink, thus can when test needs
It is used for carrying out humidifying to test specimen with water filling.
8. tester according to claim 1, wherein the vertical load lever and the horizontal loading lever are set as
Respectively so that vertical and horizontal loading is all by 1:24 lever amplification, is then re-applied on sample.
9. a kind of user of claim 1-8 any one of them large size metaling-rock contact face rheological experiments instrument
Method, including：
Slabstone in the lower box of direct shear box after installation processing, wherein the position of the slabstone can pass through the backing plate in the lower box
Fine tuning；
The upper box of direct shear box is installed, wherein moving up and down adjustable plate so as to stay seam according to granular size decision using adjusting bolt
Then width places upper box horizontal displacement fixed block；
Rubble, which is put into, into the upper box prepares sample；
Counterweight is added on toward vertical load lever, applies vertical pressure；
After vertical pressure applies and stablizes, box horizontal displacement fixed block in taking-up, then toward adding counterweight on horizontal loading lever,
Apply horizontal pull, slide the lower box and shear sample.
10. according to the method described in claim 9, it further includes：
The vertical pressure size is acquired by the counterweight weight and lever amplification coefficient added on the vertical load lever, institute
Horizontal pull size is stated to read by horizontal force snesor；
The vertical displacement of the lower box can be read vertical loading head by dial gauge and move down distance acquisition, the water of the lower box
Prosposition Mobile Communication crosses dial gauge and reads lower box displacement distance acquisition；
When test specimen deforms under load and causes horizontal loading lever that excessive inclination occurs, water is made by Balame regulating device
The position of flat load lever is adjusted to horizontality, so as to ensure that the accurate of load and position.
11. according to the method described in claim 9, it further comprises：It is used for when test is needed to sink water filling to test specimen
Carry out humidifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088828.5A CN108225918B (en) | 2018-01-30 | 2018-01-30 | Large crushed stone-rock contact surface rheological property tester and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088828.5A CN108225918B (en) | 2018-01-30 | 2018-01-30 | Large crushed stone-rock contact surface rheological property tester and use method thereof |
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| CN108225918B CN108225918B (en) | 2024-07-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827759A (en) * | 2018-07-12 | 2018-11-16 | 华北科技学院 | Mineral rheology disturbance effect instrument shock vibration system |
| CN109060561A (en) * | 2018-08-10 | 2018-12-21 | 西南交通大学 | Overall process direct shear apparatus and soil shear strength measuring method |
| CN109443988A (en) * | 2018-12-05 | 2019-03-08 | 河海大学 | A kind of test equipment and test method of coarse-grained soil rheological behavior |
| CN110967249A (en) * | 2019-11-13 | 2020-04-07 | 鞍钢集团矿业有限公司 | Direct shearing and drawing tester for geosynthetic material |
| CN113138134A (en) * | 2021-03-26 | 2021-07-20 | 中国地质大学（武汉） | Direct shear tester for testing strength of sliding belt and direct shear test method |
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| 胥建华 等: "土剪切流变试验仪改进设计", 地质灾害与环境保护 * |
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| CN108827759A (en) * | 2018-07-12 | 2018-11-16 | 华北科技学院 | Mineral rheology disturbance effect instrument shock vibration system |
| CN109060561A (en) * | 2018-08-10 | 2018-12-21 | 西南交通大学 | Overall process direct shear apparatus and soil shear strength measuring method |
| CN109443988A (en) * | 2018-12-05 | 2019-03-08 | 河海大学 | A kind of test equipment and test method of coarse-grained soil rheological behavior |
| CN109443988B (en) * | 2018-12-05 | 2021-02-12 | 河海大学 | Testing instrument and testing method for rheological property of coarse-grained soil |
| CN110967249A (en) * | 2019-11-13 | 2020-04-07 | 鞍钢集团矿业有限公司 | Direct shearing and drawing tester for geosynthetic material |
| CN113138134A (en) * | 2021-03-26 | 2021-07-20 | 中国地质大学（武汉） | Direct shear tester for testing strength of sliding belt and direct shear test method |
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