CN208239184U - A kind of rock mass discontinuity circulation shear tester - Google Patents
A kind of rock mass discontinuity circulation shear tester Download PDFInfo
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- CN208239184U CN208239184U CN201820654012.XU CN201820654012U CN208239184U CN 208239184 U CN208239184 U CN 208239184U CN 201820654012 U CN201820654012 U CN 201820654012U CN 208239184 U CN208239184 U CN 208239184U
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Abstract
The utility model provides a kind of rock mass discontinuity circulation shear tester; including base support system; cyclic load system; Normal stress system and shearing test system, cyclic load system, Normal stress system and shearing test system are mounted in base support system; cyclic load system provides continuous circulation shear load for test; Normal stress system provides stable Normal stress for test, and shearing test system provides protection for rock mass discontinuity sample, and to carry out circulation shear test.The utility model also provides a kind of test method using above-mentioned tester, including sample installation, stress application, amplitude modulationfrequency modulation, circulation shear, dynamic shear stress calculating and data analysis.The utility model overcomes the noncontinuity defect of conventional method, realizes the adjustable controllable of test amplitude and frequency, effectively increases the efficiency and precision of test.
Description
Technical field
The utility model relates to rock mechanics technical fields, particularly belong to a kind of circulation shear examination of rock mass discontinuity
Experiment device is mainly used for the mechanics parameter that test acts on lower rock mass discontinuity in vibrations load.
Background technique
The deformation failure of engineering rock mass is controlled primarily by the strength characteristics of rock mass discontinuity.In building for large-sized rock mass engineering
And if during operation, be subjected to the effect of explosive load and earthquake load, explosive load and earthquake load be both vibrations load again
It is cyclic load.Studies have shown that under cyclic load, the Undulating angle of rock mass discontinuity gradually moves back a large amount of rock mechanics
Change, roughness gradually decreases, and gradually degrading for rock mass discontinuity strength characteristics is eventually exhibited as, to influence the steady of engineering rock mass
Qualitative and safety.
Deterioration rule of the rock mass discontinuity strength characteristics under vibrations load effect, is geotechnical engineering and earthquake engineering field
Emerging research topic.Currently, existing some scholars carry out circulation shear test using rock mass discontinuity or artificial structure face, grind
The wear characteristic for having studied carefully circulation shear front-end geometry face surface analyzes circulation shear number and normal stress to rock mass discontinuity
The influence of mechanical characteristic.The studies above is for disclosing Mechanism of Deformation And Failure of the engineering rock mass under vibrations load effect with important
Theoretical and practical significance.However existing research is all made of traditional rock mass discontinuity straightway testing method, by repeatedly past
Multiple staight scissors realize that circulation shear is tested, and have the following disadvantages: 1, realize circulation shear by repeatedly reciprocal staight scissors, test process
Segmentation carries out, and does not have continuity, is not consistent with the mechanism of practical vibrations load；2, test process can not consider to shake lotus
Influence of the cycle frequency of load to test result；3, test process is difficult to control accurately the amplitude of circulation shear.Pass through inspection simultaneously
Rope, there has been no test apparatuses can be used for carrying out continuous rock mass discontinuity circulation shear test at present.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of rock mass discontinuity circulation shear testers, to carry out
The shearing strength test of rock mass discontinuity under cyclic load.The utility model solves technology used by above-mentioned technical problem
Scheme is:
A kind of rock mass discontinuity circulation shear tester, it is characterised in that: including base support system, cyclic load system
System, Normal stress system and shearing test system, base support system side is no top plate, to install the circulation
Load resisting systems, the base support system other side is the hollow three-dimensional frame with top plate and bottom plate, to install the method
To load resisting systems and the shearing test system.
While by adopting the above technical scheme, the utility model can also be used or be combined using further below
Technical solution:
The cyclic load system includes AC servo motor, motor bedplate, motor rotary shaft, motor turntable, turns
Disk activity section, connecting rod and connecting rod active section, the AC servo motor are fixed on the motor bedplate, the AC servo
Motor provides rotational kinetic energy for instrument, and the motor turntable is fixed on motor rotary shaft, and the connecting rod cooperation is described electronic
Machine turntable, the turntable active section and the connecting rod active section, the rotational kinetic energy that the AC servo motor provides is converted to
Translational kinetic energy provides continuous circulation shear load for the shearing test system.
Eccentric position on the motor turntable is equipped with a column active section bolt hole at different radii, passes through described turn
The connecting rod is connected on the different active section bolts hole by disk activity section, to realize that the amplitude of circulation shear test can
It adjusts.
It is equipped with amplitude graduation apparatus along the active section bolt hole on the motor turntable, it can be direct by amplitude graduation apparatus
Find the corresponding shearing test amplitude of different active section bolts hole；The inverse of the motor rotary speed, as circulation shear
The frequency of test, by adjusting the revolving speed of the AC servo motor, the frequency that circulation shear test can be realized is adjustable.
The Normal stress system include be in the downward numerical control flat jack of hollow three-dimensional framework upper, action direction and
It is in rigid movable backing plate below.
The shearing test system includes strain gauge, circulation shear box, fixed shear box, position limiting structure and helps sliding machine
Structure, fixed shear box can only be displaced in the up-down direction by position limiting structure limit, and the strain gauge is in cyclic load system
Circulation shear between system and circulation shear box, for being acted on during monitoring record circulation shear on the circulation shear box
Load, the circulation shear box and the fixed shear box match, Inner Constitution cavity and be used to load keep rock mass knot
Structure interviews sample, and the fixed shear box is set to above the circulation shear box, and the slide-aided mechanism, which is set to, places circulation shear
On the position of box and the movement routine of circulation shear box, circulation shear cassette bottom portion is placed on slide-aided mechanism.
The position limiting structure is using the limit plate being fixed on top plate.
The cyclic load system includes AC servo motor, motor bedplate, motor rotary shaft, motor turntable, turns
Disk activity section, connecting rod and connecting rod active section, the AC servo motor are fixed on the motor bedplate, the AC servo
Motor provides rotational kinetic energy for instrument, and the motor turntable is fixed on motor rotary shaft, and the connecting rod cooperation is described electronic
Machine turntable, the turntable active section and the connecting rod active section, the rotational kinetic energy that the AC servo motor provides is converted to
Translational kinetic energy provides continuous circulation shear load for the shearing test system；The strain gauge is set to the company
Between bar active section and the circulation shear box.
The slide-aided mechanism roller group vertical with circulation shear direction using rolling steel balls or rotation axis.
The beneficial effects of the utility model are:
1, a kind of circulation shear tester of rock mass discontinuity is provided, translation is converted for rotational kinetic energy by connecting rod principle
Kinetic energy realizes automatically coherent circulation shear process, overcomes conventional method noncontinuity defect, largely reduces test
Artificial disturbance in the process；
2, a column active section bolt hole is opened up along motor turntable radial direction, is connected to connecting rod by turntable active section
On different active section bolts hole, according to connecting rod principle, the spacing in turntable active section and the motor turntable center of circle is to recycle to cut
The range of journey is cut through, the range of circulation shear test can be adjusted by adjusting the link position of turntable active section,
The adjustable amplitude for realizing circulation shear test is controllable；
3, the frequency of the inverse of motor rotary speed, as circulation shear test, by adjusting AC servo motor
The frequency that circulation shear test can be realized in revolving speed is adjustable controllable；
4, the circulation shear stress of shearing test system is passed to using strain gauge dynamic monitoring cyclic load system,
The automatic of shear stress monitors and whole record during realizing circulation shear test.
Detailed description of the invention
Fig. 1 is a kind of front view of rock mass discontinuity circulation shear tester.
Fig. 2 is a kind of side view of rock mass discontinuity circulation shear tester.
Fig. 3 is a kind of top view of rock mass discontinuity circulation shear tester
Fig. 4 is the A-A ' sectional view of Fig. 3.
Fig. 5 is a kind of perspective view of rock mass discontinuity circulation shear tester.
Figure label: 1: instrument top plate；2: top plate fixing bolt；3: AC servo motor；4: motor bedplate；5: bottom plate
Fixing bolt；6: motor rotary shaft；7: motor turntable；8: active section bolt hole；9: amplitude graduation apparatus；10: turntable active section；
11: connecting rod；12: connecting rod active section；13: strain gauge；14: numerical control flat jack；15: jack inlet nozzle；16: rigid pad
Plate；17: fixed shear box；18: limit plate；19: circulation shear box；20: frame column；21: rolling steel ball；22: chassis.
Specific embodiment
Referring to attached drawing.A kind of rock mass discontinuity circulation shear tester provided by the utility model, including base support system
System, cyclic load system, Normal stress system and shearing test system, the cyclic load system, the Normal stress system
It is mounted in the base support system with the shearing test system, the cyclic load system passes through AC servo motor
3 kinetic energy provides circulation shear load for test, and the Normal stress system is provided by numerical control flat jack 14 for test steady
Fixed Normal stress, the shearing test system protect rock mass discontinuity sample by circulation shear box 19 and fixed shear box 17
100 and carry out circulation shear test, fixed shear box 17 is in top, and circulation shear box 19 is under fixed shear box 17
Side, fixed shear box 17 and circulation shear box 19 are protected towards the position setting of other side towards the open rock mass discontinuity sample of other side
Hold chamber.
The base support system includes chassis 22, frame column 20 and instrument top plate 1, and the chassis 22 is
L shape, the area of the instrument top plate 1 is consistent with the right side area of the chassis 22, and the bottom of the frame column 20 is solid
It is connected on chassis 22, instrument top plate 1 four is detachably connected to by top plate fixing bolt 2 at the top of the frame column 20
Angle, the chassis 22, the frame column 20 and the instrument top plate 1 constitute the support construction of entire instrument, are described
Cyclic load system, the Normal stress system and the shearing test system provide installation and operating space.
The cyclic load system includes AC servo motor 3, motor bedplate 4, motor rotary shaft 6, motor turntable
7, turntable active section 10, connecting rod 11 and connecting rod active section 12, the AC servo motor 3 are fixed on the motor bedplate 4,
The AC servo motor 3 provides rotational kinetic energy for test, and the motor bedplate 4 passes through bottom plate fixing bolt 5 removably
It is connected to 22 left side of chassis, the motor rotary shaft 6 is stretched out from 3 one end of AC servo motor, and the motor turns
Disk 7 is fixed on motor rotary shaft 6, and the eccentric position of the motor turntable 7 is equipped with a column active section bolt hole 8 and amplitude scale
Table 9, the turntable active section 10 is detachably connected on the motor turntable 7 by the active section bolt hole 8, described
11 both ends of connecting rod are respectively rotatably connected on the turntable active section 10 and the connecting rod active section 12, connecting rod active section 12
It is removably connect with circulation shear box, the connecting rod 11 cooperates the motor turntable 7, turntable active section 10 and connecting rod activity
Section 12, is converted to translational kinetic energy for the rotational kinetic energy that the AC servo motor 3 provides, provides and follow for the shearing test system
Ring shear load.
The Normal stress system includes numerical control flat jack 14, jack inlet nozzle 15 and rigid backing plate 16, the number
Control flat jack 14 is set to 1 downside of the instrument top plate, and the jack inlet nozzle 15 is by right side limit plate 18 to overhanging
Out, the rigid backing plate 16 is set between the flat jack 14 and fixed shear box 17, for stablizing and being evenly distributed with normal direction lotus
It carries, the numerical control flat jack 14 and the rigid backing plate 16 are used cooperatively, and provide stable method for the shearing test system
To load.
The shearing test system includes strain gauge 13, circulation shear box 19, fixed shear box 17,18 and of limit plate
Rolling steel ball 21, the strain gauge 13 are set between the connecting rod active section 12 and the circulation shear box 19, are used for
The circulation shear load on the circulation shear box 19, the circulation shear box 19 are acted on during monitoring record circulation shear
It is matched with the fixed shear box 17, the rock mass discontinuity sample holding chamber structure of fixed shear box 17 and circulation shear box 19
At rectangular cavity 200 for loading rock mass discontinuity sample, the fixed shear box 17 is set on the circulation shear box 19
Side, 17 two sides of fixed shear box are limited and are vertically oriented by the limit plate 18, and the rolling steel ball 21 opens up in column
In the right part of chassis 22,19 bottom of circulation shear box is contacted with the rolling steel ball 21, is convenient for the circulation
Under cyclic load shear displacemant can occur for shear box, improve the accuracy of test.
Carrying out the test of rock mass discontinuity circulation shear using the utility model, specific step is as follows:
(1) sample is installed: the rock mass discontinuity sample 100 that preparation is completed is packed into circulation shear box 19 and fixed shear box
In rectangular cavity 200 between 17, then circulation shear box 19, fixed shear box 17 and structural fece sample 100 pushed away as a whole
Enter in test apparatus；
(2) stress applies: rigid backing plate 16 being placed between numerical control flat jack 14 and fixed shear box 17, according to rock
Practically stress condition determines normal stress value locating for body structural fece sample sample point, is gradually applied using numerical control flat jack
Normal stress is to setting value；
(3) amplitude modulationfrequency modulation: according to research needs, the amplitude and frequency of circulation shear test are determined, according to determining test
The link position of amplitude adjustment turntable active section and motor turntable；The revolving speed of AC servo motor is set according to test frequency；
(4) circulation shear: maintaining the normal stress of numerical control flat jack constant, and starting AC servo motor is carried out circulation and cut
Test is cut, it is 1 circulation shear that motor turntable, which completes rotation in 1 week, while using the record examination of strain gauge monitored over time
Circulation shear load during testing, until completing the circulation shear test of stipulated number；
(5) dynamic shear stress calculates: being calculated by formula 1 and the dynamic of rock mass discontinuity sample after different number of cycles shearings is undergone to cut
Stress value.
Wherein, τnFor the dynamic shear stress value of rock mass discontinuity sample after experience n times circulation shear；PnIt is cut for experience n times circulation
The circulation shear load that strain gauge records when cutting；f0For total frictional resistance of instrument；A is the area of rock mass discontinuity sample.
(6) data are analyzed: being vertical sit with dynamic shear stress value using circulation shear number as abscissa in rectangular coordinate system
Mark, the testing site of dynamic shear stress value when drawing corresponding circulation shear number are fitted circulation shear number and dynamic shear stress using formula 2
Relationship between value, to obtain the calculation formula of rock mass discontinuity sample dynamic shear stress value:
Y(τn)=τ0×[a+(1-a)×e-bn] formula 2
Wherein, Y (τn) be rock mass discontinuity sample dynamic shear stress calculated value；τ0For the initial dynamic shear stress of rock mass discontinuity
Value；N is circulation shear number；A and b is undetermined coefficient, is fitted and is obtained by test result.
The foregoing is merely the structure features of specific embodiment of the utility model, but the utility model to be not limited to
This, in the field of the utility model, made changes or modifications all cover practical new at this any those skilled in the art
Among the protection scope of type.
Claims (9)
1. a kind of rock mass discontinuity circulation shear tester, it is characterised in that: including base support system, cyclic load system,
Normal stress system and shearing test system, base support system side are no top plate, to install the circulation lotus
Loading system, the base support system other side is the hollow three-dimensional frame with top plate and bottom plate, to install the normal direction
Load resisting systems and the shearing test system.
2. a kind of rock mass discontinuity circulation shear tester as described in claim 1, it is characterised in that: the cyclic load system
System includes AC servo motor, motor bedplate, motor rotary shaft, motor turntable, turntable active section, connecting rod and connecting rod activity
Section, the AC servo motor are fixed on the motor bedplate, and the AC servo motor provides rotational kinetic energy for instrument,
The motor turntable is fixed on motor rotary shaft, the connecting rod cooperate the motor turntable, the turntable active section and
The rotational kinetic energy that the AC servo motor provides is converted to translational kinetic energy by the connecting rod active section, is the shearing test
System provides continuous circulation shear load.
3. a kind of rock mass discontinuity circulation shear tester as claimed in claim 2, it is characterised in that: the motor turntable
On eccentric position at different radii be equipped with a column active section bolt hole, the connecting rod is connected by the turntable active section
In on the different active section bolts hole, to realize the adjustable amplitude of circulation shear test.
4. a kind of rock mass discontinuity circulation shear tester as claimed in claim 3, it is characterised in that: the motor turntable
On along the active section bolt hole be equipped with amplitude graduation apparatus, different active section bolts hole pair can be directly found by amplitude graduation apparatus
The shearing test amplitude answered；The frequency of the inverse of the motor rotary speed, as circulation shear test, by adjusting described
The revolving speed of AC servo motor, the frequency that circulation shear test can be realized is adjustable.
5. a kind of rock mass discontinuity circulation shear tester as described in claim 1, it is characterised in that: the Normal stress system
System includes being in the downward numerical control flat jack of hollow three-dimensional framework upper, action direction and being in rigid movable pad below
Plate.
6. a kind of rock mass discontinuity circulation shear tester as described in claim 1, it is characterised in that: the shearing test system
System includes strain gauge, circulation shear box, fixed shear box, position limiting structure and slide-aided mechanism, and fixed shear box is tied by limit
Structure limit can only be displaced in the up-down direction, and the strain gauge is between cyclic load system and circulation shear box, be used
Act on the circulation shear load on the circulation shear box during the monitoring record circulation shear, the circulation shear box and
The fixed shear box matches, Inner Constitution cavity and be used to load keep rock mass discontinuity sample, the fixed shear
Box is set to above the circulation shear box, and the slide-aided mechanism is set to the position for placing circulation shear box and circulation shear box
Movement routine on, circulation shear cassette bottom portion is placed on slide-aided mechanism.
7. a kind of rock mass discontinuity circulation shear tester as claimed in claim 6, it is characterised in that: the position limiting structure is adopted
With the limit plate being fixed on top plate.
8. a kind of rock mass discontinuity circulation shear tester as claimed in claim 6, it is characterised in that: the cyclic load system
System includes AC servo motor, motor bedplate, motor rotary shaft, motor turntable, turntable active section, connecting rod and connecting rod activity
Section, the AC servo motor are fixed on the motor bedplate, and the AC servo motor provides rotational kinetic energy for instrument,
The motor turntable is fixed on motor rotary shaft, the connecting rod cooperate the motor turntable, the turntable active section and
The rotational kinetic energy that the AC servo motor provides is converted to translational kinetic energy by the connecting rod active section, is the shearing test
System provides continuous circulation shear load；
The strain gauge is set between the connecting rod active section and the circulation shear box.
9. a kind of rock mass discontinuity circulation shear tester as claimed in claim 6, it is characterised in that: the slide-aided mechanism is adopted
With rolling steel balls or the rotation axis roller group vertical with circulation shear direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820654012.XU CN208239184U (en) | 2018-05-04 | 2018-05-04 | A kind of rock mass discontinuity circulation shear tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820654012.XU CN208239184U (en) | 2018-05-04 | 2018-05-04 | A kind of rock mass discontinuity circulation shear tester |
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| CN208239184U true CN208239184U (en) | 2018-12-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444816A (en) * | 2018-05-04 | 2018-08-24 | 中国电建集团华东勘测设计研究院有限公司 | A kind of rock mass discontinuity circulation shear tester and test method |
| CN110455644A (en) * | 2019-08-06 | 2019-11-15 | 武汉理工大学 | The shearing test device of the two-way exciting of the soil body |
| CN115824841A (en) * | 2023-02-07 | 2023-03-21 | 浙大城市学院 | Method for measuring tension-shear and compression-shear coupling stress of rock-soil mass |
-
2018
- 2018-05-04 CN CN201820654012.XU patent/CN208239184U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444816A (en) * | 2018-05-04 | 2018-08-24 | 中国电建集团华东勘测设计研究院有限公司 | A kind of rock mass discontinuity circulation shear tester and test method |
| CN108444816B (en) * | 2018-05-04 | 2024-04-02 | 中国电建集团华东勘测设计研究院有限公司 | Rock mass structural plane cyclic shear tester and test method |
| CN110455644A (en) * | 2019-08-06 | 2019-11-15 | 武汉理工大学 | The shearing test device of the two-way exciting of the soil body |
| CN115824841A (en) * | 2023-02-07 | 2023-03-21 | 浙大城市学院 | Method for measuring tension-shear and compression-shear coupling stress of rock-soil mass |
| CN115824841B (en) * | 2023-02-07 | 2023-05-09 | 浙大城市学院 | Rock-soil body tensile shear and compressive shear coupling stress measurement method |
| JP7313753B1 (en) * | 2023-02-07 | 2023-07-25 | 浙大城市学院 | Measurement method of cohesive stress of tensile shear and pressure shear of rock body |
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