CN106644758A - Rock direct shear and point load test device and test operation method thereof - Google Patents
Rock direct shear and point load test device and test operation method thereof Download PDFInfo
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- CN106644758A CN106644758A CN201611072138.8A CN201611072138A CN106644758A CN 106644758 A CN106644758 A CN 106644758A CN 201611072138 A CN201611072138 A CN 201611072138A CN 106644758 A CN106644758 A CN 106644758A
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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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
- 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
- G01N3/12—Pressure testing
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- 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
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Abstract
The invention discloses a rock direct shear and point load test device which comprises a loading counter-force frame, an axial loading system, a normal loading system, a shear test fixture and a point load test fixture. The rock direct shear and point load test device not only can develop rock direct shear test, but also can develop rock point load test; meanwhile, the invention discloses a rock direct shear and point load test operation method. The rock direct shear and point load test device is simple and practical in structure and strong in maneuverability, and can adapt to rectangular and cylindrical rock samples with different shapes and sizes.
Description
Technical field
The invention belongs to rock mechanics experiment Instrument technology field, specifically related to a kind of rock staight scissors and Point Load Tests are filled
Put and its experimental working technique.
Background technology
In recent years, with the development that national Large Infrastructure Projects are built, the problem related to rock mechanics is a large amount of in engineering
Occur.The shearing of rock and comprcssive strength are the topmost mechanical index of rock, in recent years by applying shearing force or shearing position
The method that shifting is tested rock strength is taken seriously in worldwide.Wherein, direct shear test because its is easy to operate,
It is applied widely and apply it is the most universal.
Due to without unified direct shear test instrument manufacturer's standard, the rock direct shear test instrument that each unit is voluntarily developed
There is very big difference from form, structure to using method.From in terms of the retrieval of data, direct shear apparatus equipment both domestic and external is a lot：Such as
The large-scale high-performance contact surface direct shear apparatuses of LG-140 of Durham Geo companies of U.S. production, it is large-scale that ELE companies of Britain produce
Direct shear apparatus, GCTS companies of the U.S. production SERVO CONTROL staight scissors test system, Tsing-Hua University develop TH-20t it is large-scale soil with
Structure interface circular loading shear apparatus, the indoor DHJ60 types stacked ring type shearing test of the Changjiang river research institute geotechnique's institute
Machine, the coarse soil direct shear instrument that water power institute of Sichuan University develops, the high property of NHRI-4000 types of Nanjing soil Instrument Ltd.
Can large contact surface direct shear apparatus.
But the said equipment still suffers from many weak points:
（1）Complex operation.Such as angle variable plate method shearing test, need to prepare the cuboid sample of given size, and need in test
Different angles of inclination are adjusted, makes sample that failure by shear occur along different directions；Also some test apparatuses, before needing test
Lining mould is made, will be solid in die trial with glue such as cement after the wrapping of test specimen waterproof jacket, the work such as mica powder is spread in the middle part of die trial
For shear surface.These complicated operating process, are unfavorable for the development of undergraduate's laboratory, if especially student's operation is not yet done
Practice, be easily caused instrument damage.
（2）Single function.Some instruments described above can only carry out single experimental project, carry out other experiments and need it
Its instrument, it is difficult to meet needs.
（3）Rock sample specification requirement is strict.Existing some direct shear test instruments are strict to specimen size size requirements, small-sized system
Row sample is tested in mini-plant, and medium-sized Series of Samples is tested in medium size installations, and large series sample sets large-scale
Standby middle test.Caused consequence is that the test result of each equipment cannot effectively be connected.
The content of the invention
It is an object of the invention to provide a kind of rock staight scissors and Point Load Tests device, the device can carry out rock staight scissors
Test, can also carry out Rock Point Load Strength, while providing rock staight scissors and Point Load Tests operational approach.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of rock staight scissors and Point Load Tests device, its feature is：Including loading reaction frame, axial loading system, method
To loading system, shearing test clamp and Point Load Tests fixture：
Described loading reaction frame is made up of four root posts, upright nut, crossbeam and workbench, and workbench is provided with four and stands
Post, using threaded connection, column upper end is installed crossbeam and is fixed by upright nut, in order to strengthen column in the strong of work stress
Degree, is provided with gusset between column；Described work top center is provided with a fixation stove bolt；
Described axial loading system includes axially loaded jack, axial hand oil pump and pressure transducer；Described axial direction
Loading jack base end is arranged on crossbeam center and is fixedly connected using screw, and the piston end of axially loaded jack sets
There is pressure transducer；Described axial hand oil pump is connected with axially loaded jack by oil pipe, and axial direction is provided with pipeline
Loading valve and pressure gauge with back connection；
Described normal direction loading system includes normal direction loading jack, horizontal reacting force screw rod, bolt and nut, normal direction hand oil pump；
Described normal direction loading jack is arranged in the middle of the two root posts of the upper plane frontal left of workbench, described horizontal reacting force
Screw rod and bolt and nut are arranged in the middle of the two root posts of the positive right side of face of upper plane of workbench, and horizontal reacting force screw rod tail end is equipped with
By handle；Described normal direction hand oil pump is connected with normal direction loading jack by oil pipe, and normal direction charge valve is provided with pipeline
Door, normal pressure table and overflow valve；
Described shearing test clamp includes horizontal reacting force plate and shear box；Described shear box include pressing plate, band roller bearing pressing plate,
Rubber backing plate, shearing keeper plate of steel；On horizontal reacting force plate, two pressing plates are respectively disposed on band to two band roller bearing pressing plate symmetrical placements
Lay sample in the inner side of roller bearing pressing plate, centre；Rubber backing plate and shearing keeper plate of steel, rubber are laid respectively in the top and bottom of sample
Backing plate and shearing keeper plate of steel are symmetrically laid with sample shear centre；
Described Point Load Tests fixture includes upper polishing head, lower polishing head；Upper polishing head is lived installed in axially loaded jack
The lower surface of plug side pressure force transducer, lower polishing head is arranged on table core, is fixed by stove bolt；
Of the invention the characteristics of, also resides in：
Described pressing plate and the Alignment Design in sample contacts face are linear, circular arc or abnormity, described shearing keeper plate of steel
Linear is identical with the linear of sample, and shear box adapts to the rock sample of rectangle, cylinder and different shape and size.
The shearing test operational approach of a kind of rock staight scissors and Point Load Tests device, is made up of following steps：
Step one：Axially loaded valve is opened, axial hand oil pump is manipulated, makes piston drop to correct position, by horizontal reacting force
Plate is placed in table core position and is fixed by stove bolt, and adjustment work platform transverse center loads jack and horizontal reacting force with normal direction
Screw rod is axially in parallel；
Step 2：Corresponding shear box is filled according to different specimen shapes and set of dimensions, packet sample selects square shear steel
Pressing plate and corresponding pressing plate and band roller bearing pressing plate, cylindrical specimens select circular cutout keeper plate of steel and corresponding pressing plate and band roller bearing
Pressing plate；, the positive zoom level reaction plate center of shearing billet, with the another one side of something hollow part of rubber backing plate filling shearing billet
Point, then sample being placed on shearing billet and is aligned, sample upper surface is equally covered with shearing billet and is aligned, using rubber
The another one side of something hollow parts of leather packing plate filling shearing billet, billet is sheared up and down symmetrically to be laid with sample shear centre；
Step 3：Normal direction hand oil pump is manipulated, loading end face is in close contact with sample；
Step 4：Lay pressing plate, band roller bearing pressing plate, adjustment normal direction loading jack and horizontal reacting force successively respectively in sample two sides
Screw rod makes close contact, if absent-mindedness, swinging handle makes horizontal reacting force screw rod in close contact therewith, notices that pressing plate will be completely covered
Firmly sample two sides, and keep center side consistent with normal direction loading center；
Step 5：Normal stress starts hierarchical loading from 0MPa, and same levels are increased every time, sets Normal stress predetermined value, beats
Therapy of waking up the patient from unconsciousness manipulates normal direction hand oil pump to loading valve, and loading velocity is slowly at the uniform velocity carried out, and makes normal pressure represent that number reaches predetermined
Value；
Step 6：Axial hand oil pump is manipulated, loading velocity is slowly at the uniform velocity carried out, until sample destruction, obtains by pressure sensing
The load value of device collection.
The Point Load Tests operational approach of a kind of rock staight scissors and Point Load Tests device, is made up of following steps：
Step one：Upper polishing head is respectively installed under the piston end pressure transducer of axially loaded jack with lower polishing head
End face and table core, upper polishing head is with lower polishing head on same vertical curve；
Step 2：Axially loaded valve is opened, axial hand oil pump is manipulated, makes piston drop to correct position, sample is placed
On lower polishing head, while manipulating axial hand oil pump, polishing head and sample close contact, contact point and sample axle center weight are made
Close, keep sample axis and upper polishing head, lower polishing head line coincident；
Step 3：Axial hand oil pump, at the uniform velocity loading are manipulated until sample destruction, obtains the charge number gathered by pressure transducer
Value.
Beneficial effects of the present invention
（1）It is simple to operate, it is workable, it is easy to carry out the hard mechanical behaviour of soil and rock testing experiment of design mode.According to some biographies
The rock shearing test of system needs casting concrete to wrap up rock, and the present invention is reduced using the shearing test clamp of special design
Sample program is wrapped up with concrete（And the impact of parcel cement）, and greatly shortening prepares the sample cycle.In addition, according to specification
Requirement prepares the compressive strength test of standard specimen development rock and takes time and effort, and needs special sample making apparatus, is unfavorable for student
Start to carry out multifarious autonomous Design type test, and use Point Load Tests method simple and convenient, sample, can without the need for loaded down with trivial details processing
Test data is obtained in time.Laboratory test sample preparation difficult decayed rock, weak broken rock etc. can be directed to and carry out test.
（2）Rock direct shear test and Point Load Tests can be carried out, function is more.The device is by making respectively direct shear test and point
Loading test fixture, and same set of loading system and sensing system are used, reaching can carry out rock direct shear test, also can carry out
The purpose of Point Load Tests, lifts the cost performance of instrument.
（3）The shearing test for adapting to various sizes of rock sample can be carried out.By improving shearing indenter size etc. so that shearing
Box can be to different shape（Cylinder, cuboid）Carry out shearing test with various sizes of sample.
With reference to the accompanying drawings and examples the present invention is further described.
Description of the drawings
Fig. 1 is a kind of rock staight scissors and Point Load Tests device shearing test schematic diagram of the present invention.
Fig. 2 is packet sample shear box sectional view in Fig. 1.
Fig. 3 is the B-B sectional views of Fig. 2.
Fig. 4 is cylindrical specimens shear box sectional view.
Fig. 5 is a kind of rock staight scissors and Point Load Tests device Point Load Tests schematic diagram of the present invention.
Fig. 6 is a kind of rock staight scissors and Point Load Tests device front view of the present invention.
Fig. 7 is the top view of Fig. 6.
Fig. 8 is the left view of Fig. 6.
It is numbered in figure：1- gussets, 2- workbench, 3- stove bolts, 4- horizontal reacting force plates, 5- shear boxs, 6- pressing plates, 7- bands
Roller bearing pressing plate, 8- rubber backing plates, 9- shearing keeper plate of steels, the upper polishing heads of 10-, the axially loaded jack of 11-, 12- is axially oily manually
Pump, the axially loaded valves of 13-, 14- pressure gauge with back connection, 15- normal direction loading jack, 16- counter-force screw rods, 17- normal direction is oily manually
Pump, 18- overflow valves, 19- normal direction loading valve, 20- normal pressure tables, 21- samples, polishing head under 22-, 23- columns, 24- is horizontal
Beam, 25- handles, 26- bolt and nuts, 27 upright nuts, 28 pressure transducers.
With reference to the accompanying drawings and examples the invention will be further described.
Specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, Fig. 1 is that a kind of rock staight scissors and Point Load Tests device of the present invention are cut
Test schematic diagram is cut, Fig. 2 is packet sample shear box sectional view in Fig. 1, and Fig. 3 is the B-B sectional views of Fig. 2, and Fig. 4 is cylinder
Sample shear box sectional view, Fig. 5 is a kind of rock staight scissors and Point Load Tests device Point Load Tests schematic diagram of the present invention.
A kind of rock staight scissors and Point Load Tests device of the present invention, its feature is：Including loading reaction frame, axial direction
Loading system, normal direction loading system, shearing test clamp and Point Load Tests fixture：
Described loading reaction frame is made up of four root posts 23, upright nut 27, crossbeam 24 and workbench 2, and workbench 2 sets
There are four root posts 23, using threaded connection, the upper end of column 23 is installed crossbeam 24 and fixed by upright nut 27, in order to strengthen column
23, in the intensity of stress that works, are provided with gusset 1 between column 23；The described face center of workbench 2 is provided with a fixation
Stove bolt 3；
Described axial loading system includes axially loaded jack 11, axial hand oil pump 12 and pressure transducer 28；It is described
The base end of axially loaded jack 11 be arranged on and the center of crossbeam 24 and be fixedly connected using screw, axially loaded jack
11 piston end is provided with pressure transducer 28；Described axial hand oil pump 12 is connected with axially loaded jack 11 by oil pipe
Connect, axially loaded valve 13 and pressure gauge with back connection 14 are installed in pipeline；
Described normal direction loading system includes that normal direction loading jack 15, horizontal reacting force screw rod 16, bolt and nut 26, normal direction are manual
Oil pump 17；Described normal direction loading jack 15 is arranged in the middle of the two root posts 23 of the upper plane frontal left of workbench 2, institute
The horizontal reacting force screw rod 16 stated and bolt and nut 26 are arranged in the middle of the two root posts 23 of the positive right side of face of upper plane of workbench 2,
The tail end of horizontal reacting force screw rod 16 is equipped with by handle 25；Described normal direction hand oil pump 17 passes through oil pipe with normal direction loading jack 15
Connection, is provided with normal direction loading valve 19, normal pressure table 20 and overflow valve 18 in pipeline；
Described shearing test clamp includes horizontal reacting force plate 4 and shear box 5；Described shear box 5 includes pressing plate 6, band roller bearing
Pressing plate 7, rubber backing plate 8, shearing keeper plate of steel 9；Two symmetrical placements of band roller bearing pressing plate 7 on horizontal reacting force plate 4, two pressing plates 6
The inner side with roller bearing pressing plate 7 is respectively disposed on, sample 21 is laid in centre；Rubber backing plate is laid respectively in the top and bottom of sample 21
8 is with the symmetrically placement of the shear centre of sample 21 with shearing keeper plate of steel 9, rubber backing plate 8 and shearing keeper plate of steel 9；
Described Point Load Tests fixture includes upper polishing head 10, lower polishing head 22；Upper polishing head 10 is arranged on axially loaded thousand
The lower surface of 11 piston end pressure transducers 28 of jin top, lower polishing head 22 is arranged in workbench 2 in the heart, is fixed by stove bolt 3.
Of the invention the characteristics of, also resides in：
Described pressing plate 6 and the Alignment Design of the contact surface of sample 21 are linear, circular arc or abnormity, described shearing keeper plate of steel
The linear of 9 linear and sample 21 is identical, and shear box 5 adapts to the rock of rectangle, cylinder and different shape and size
Sample.
The shearing test operational approach of a kind of rock staight scissors and Point Load Tests device, is made up of following steps：
Step one：Axially loaded valve 13 is opened, axial hand oil pump 12 is manipulated, makes piston drop to correct position, by level
Reaction plate 4 is placed in the center of workbench 2 and is fixed by stove bolt 3, and the transverse center of adjustment work platform 2 loads jack 15 with normal direction
And horizontal reacting force screw rod 16 is axially in parallel；
Step 2：Corresponding shear box 5 is filled according to different specimen shapes and set of dimensions, packet sample 21 selects square cutouts
Keeper plate of steel 9 and corresponding pressing plate 6 and band roller bearing pressing plate 7, cylindrical specimens 21 select circular cutout keeper plate of steel 9 and corresponding pressing plate
6 and band roller bearing pressing plate 7；, the positive center of zoom level reaction plate 4 of shearing billet 9, with the filling shearing billet 9 of rubber backing plate 8
Another one side of something hollow parts, are then placed on sample 21 on shearing billet 9 and align, and shear steel pad is equally used in the upper surface of sample 21
Plate 9 is covered and aligned, and using the another one side of something hollow parts of the filling shearing billet 9 of rubber backing plate 8, it is to try that billet 9 is sheared up and down
What the shear centre of sample 21 was symmetrically laid；
Step 3：Normal direction hand oil pump 17 is manipulated, loading end face is in close contact with sample 21；
Step 4：Lay pressing plate 6, band roller bearing pressing plate 7, adjustment normal direction loading jack 15 and water successively respectively in the two sides of sample 21
Power of redressing screw rod 16 makes close contact, if absent-mindedness, swinging handle 25 makes horizontal reacting force screw rod 16 in close contact therewith, notes pressure
Plate 6 will cover all the two sides of sample 21, and keep center side consistent with normal direction loading center；
Step 5：Normal stress starts hierarchical loading from 0MPa, and same levels are increased every time, sets Normal stress predetermined value, beats
Therapy of waking up the patient from unconsciousness manipulates normal direction hand oil pump 17 to loading valve 19, and loading velocity is slowly at the uniform velocity carried out, and reaches the registration of normal pressure table 20
To predetermined value；
Step 6：Axial hand oil pump 12 is manipulated, loading velocity is slowly at the uniform velocity carried out, until sample 21 is destroyed, obtained by pressure
The load value of the collection of sensor 28.
The Point Load Tests operational approach of a kind of rock staight scissors and Point Load Tests device, is made up of following steps：
Step one：Upper polishing head 10 and lower polishing head 22 are respectively installed to into the piston end pressure sensing of axially loaded jack 11
The lower surface and the center of workbench 2 of device 28, upper polishing head 10 is with lower polishing head 22 on same vertical curve；
Step 2：Axially loaded valve 13 is opened, axial hand oil pump 12 is manipulated, makes piston drop to correct position, by sample
21 are placed on lower polishing head 22, while manipulating axial hand oil pump 12, polishing head 10 is in close contact with sample 21, contact
Point and the axis coinciding of sample 21, keep the axis of sample 21 and upper polishing head 10, the line coincident of lower polishing head 22；
Step 3：Axial hand oil pump 12 is manipulated, at the uniform velocity loading is destroyed up to sample 21, obtains what is gathered by pressure transducer 28
Load value.
Further instruction：
Referring to Fig. 6, Fig. 7 and Fig. 8, Fig. 6 is a kind of rock staight scissors and Point Load Tests device front view of the present invention, and Fig. 7 is Fig. 6
Top view, Fig. 8 is the left view of Fig. 6.
The present invention is 50 tons from the tonnage of axially loaded jack 11, and the tonnage of normal direction loading jack 15 is 30 tons；
Loading reaction frame is designed according to the tonnage of jack；Hydraulic pressure in axial loading system and normal direction loading system
Part：Axially loaded jack 11, axial hand oil pump 12, axially loaded valve 13, pressure gauge with back connection 14, normal direction loading jack
15th, normal direction hand oil pump 17, overflow valve 18, normal direction loading valve 19, normal pressure table 20 and its auxiliary accessories are commercially available
's.
Claims (4)
1. a kind of rock staight scissors and Point Load Tests device, it is characterised in that：Including loading reaction frame, axial loading system,
Normal direction loading system, shearing test clamp and Point Load Tests fixture：
Described loading reaction frame is by four root posts（23）, upright nut（27）, crossbeam (24) and workbench（2）Composition,
Workbench（2）It is provided with four root posts（23）, using threaded connection, column（23）Crossbeam (24) is installed by upright nut in upper end
（27）It is fixed, in order to strengthen column（23）In the intensity of work stress, in column（23）Between be provided with gusset（1）；It is described
Workbench（2）Face center is provided with a fixation stove bolt（3）；
Described axial loading system includes axially loaded jack（11）, axial hand oil pump（12）And pressure transducer
（28）；Described axially loaded jack（11）Base end is arranged on crossbeam (24) center and is fixedly connected using screw,
Axially loaded jack（11）Piston end be provided with pressure transducer（28）；Described axial hand oil pump（12）With it is axially loaded
Jack（11）Connected by oil pipe, axially loaded valve is installed in pipeline（13）And pressure gauge with back connection（14）；
Described normal direction loading system includes that normal direction loads jack（15）, horizontal reacting force screw rod（16）, bolt and nut（26）, method
To hand oil pump（17）；Described normal direction loading jack（15）Installed in workbench（2）Two of upper plane frontal left
Column（23）Centre, described horizontal reacting force screw rod（16）And bolt and nut（26）Installed in workbench（2）Upper plane front
The two root posts on right side（23）Centre, horizontal reacting force screw rod（16）Tail end is equipped with by handle（25）；Described normal direction hand oil pump
（17）Jack is loaded with normal direction（15）Connected by oil pipe, normal direction loading valve is installed in pipeline（19）, normal pressure table
（20）And overflow valve（18）；
Described shearing test clamp includes horizontal reacting force plate（4）And shear box（5）；Described shear box（5）Including pressing plate
（6）, band roller bearing pressing plate（7）, rubber backing plate（8）, shearing keeper plate of steel（9）；Two band roller bearing pressing plates（7）Symmetrical placement is in horizontal reverse
Power plate（4）On, two pressing plates（6）It is respectively disposed on band roller bearing pressing plate（7）Inner side, centre lay sample（21）；Sample（21）
Top and bottom lay rubber backing plate respectively（8）With shearing keeper plate of steel（9）, rubber backing plate（8）With shearing keeper plate of steel（9）Be with
Sample（21）What shear centre was symmetrically laid；
Described Point Load Tests fixture includes upper polishing head（10）, lower polishing head（22）；Upper polishing head（10）Installed in axial direction
Loading jack（11）Piston end pressure transducer（28）Lower surface, lower polishing head（22）Installed in workbench（2）In in the heart,
By stove bolt（3）It is fixed.
2. a kind of rock staight scissors according to claim 1 and Point Load Tests device, it is characterised in that described pressing plate（6）
With sample（21）The Alignment Design of contact surface be linear, circular arc or abnormity, described shearing keeper plate of steel（9）It is linear with examination
Sample（21）It is linear be identical, shear box（5）Adapt to the rock sample of rectangle, cylinder and different shape and size.
3. a kind of shearing test operational approach of a kind of rock staight scissors and Point Load Tests device as described in claim 1, its
It is characterised by being made up of following steps：
Step one：Open axially loaded valve（13）, manipulate axial hand oil pump（12）, make piston drop to correct position, will
Horizontal reacting force plate（4）It is placed in workbench（2）Center is by stove bolt（3）It is fixed, adjustment work platform（2）Transverse center and normal direction
Loading jack（15）And horizontal reacting force screw rod（16）It is axially in parallel；
Step 2：Corresponding shear box is filled according to different specimen shapes and set of dimensions（5）, packet sample（21）Select square
Shearing keeper plate of steel（9）And corresponding pressing plate（6）With band roller bearing pressing plate（7）, cylindrical specimens（21）Select circular cutout keeper plate of steel
（9）And corresponding pressing plate（6）With band roller bearing pressing plate（7）；, shearing billet（9）Positive zoom level reaction plate（4）Center, uses
Rubber backing plate（8）Filling shearing billet（9）Another one side of something hollow parts, then sample（21）It is placed on shearing billet（9）
On align, sample（21）Upper surface is equally with shearing billet（9）Cover and align, using rubber backing plate（8）Filling shear steel pad
Plate（9）Another one side of something hollow parts, shear up and down billet（9）It is with sample（21）What shear centre was symmetrically laid；
Step 3：Manipulate normal direction hand oil pump（17）, make loading end face and sample（21）It is in close contact；
Step 4：Sample（21）Lay pressing plate successively respectively in two sides（6）, band roller bearing pressing plate（7）, adjustment normal direction loading jack
（15）And horizontal reacting force screw rod（16）Close contact is made, if absent-mindedness, swinging handle（25）Make horizontal reacting force screw rod（16）With it
It is in close contact, notes pressing plate（6）Cover all sample（21）Two sides, and keep center side to load center one with normal direction
Cause；
Step 5：Normal stress starts hierarchical loading from 0MPa, and same levels are increased every time, sets Normal stress predetermined value, beats
Therapy of waking up the patient from unconsciousness is to loading valve（19）, manipulate normal direction hand oil pump（17）, loading velocity slowly at the uniform velocity carries out, and makes normal pressure table（20）
Registration reaches predetermined value；
Step 6：Manipulate axial hand oil pump（12）, loading velocity is slowly at the uniform velocity carried out, until sample（21）Destruction, obtain by
Pressure transducer（28）The load value of collection.
4. a kind of Point Load Tests operational approach of a kind of rock staight scissors and Point Load Tests device as described in claim 1,
It is characterized in that being made up of following steps：
Step one：By upper polishing head（10）With lower polishing head（22）It is respectively installed to axially loaded jack（11）Piston side pressure
Force transducer（28）Lower surface and workbench（2）Center, upper polishing head（10）With lower polishing head（22）On same vertical curve；
Step 2：Open axially loaded valve（13）, manipulate axial hand oil pump（12）, make piston drop to correct position, will
Sample（21）It is placed on lower polishing head（22）On, while manipulating axial hand oil pump（12）, make polishing head（10）With sample
（21）Close contact, contact point and sample（21）Axis coinciding, keeps sample（21）Axis and upper polishing head（10）, lower polishing head
（22）Line coincident；
Step 3：Manipulate axial hand oil pump（12）, at the uniform velocity loading is until sample（21）Destruction, obtains by pressure transducer（28）
The load value of collection.
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| CN201611072138.8A CN106644758B (en) | 2016-11-29 | 2016-11-29 | Rock direct shear and point load test device and test operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072138.8A CN106644758B (en) | 2016-11-29 | 2016-11-29 | Rock direct shear and point load test device and test operation method thereof |
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| CN106644758A true CN106644758A (en) | 2017-05-10 |
| CN106644758B CN106644758B (en) | 2023-02-28 |
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| CN108225946A (en) * | 2018-03-16 | 2018-06-29 | 四川大学 | A kind of cylindrical rock sample straight shear device and method |
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| CN108426788A (en) * | 2018-04-11 | 2018-08-21 | 四川大学 | Rock direct shearing test test specimen, piece fixture and its shearing test method |
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| CN109269897A (en) * | 2018-11-14 | 2019-01-25 | 深圳大学 | A kind of tension experimental rig under lateral stressed state |
| CN109374369A (en) * | 2018-08-30 | 2019-02-22 | 中国地质大学（武汉） | A kind of device and method for realizing the rock joint charges difference degree of consolidation |
| CN109443913A (en) * | 2018-12-25 | 2019-03-08 | 长沙矿山研究院有限责任公司 | A kind of fixed device of rock test block for Point Load Tests |
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| CN113686695A (en) * | 2021-07-27 | 2021-11-23 | 中国科学院武汉岩土力学研究所 | Rock friction test device |
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| CN114778346A (en) * | 2022-04-21 | 2022-07-22 | 合肥工业大学 | Driving load simulation device |
| CN114858621A (en) * | 2022-07-07 | 2022-08-05 | 四川省公路规划勘察设计研究院有限公司 | Mud rock on-site direct shear test method and equipment |
| CN108426788B (en) * | 2018-04-11 | 2024-06-04 | 四川大学 | Rock direct shear experiment test piece, test piece clamp and shear test method thereof |
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