CN107036909A - A kind of ring shear test instrument suitable for vertical shearing face - Google Patents
A kind of ring shear test instrument suitable for vertical shearing face Download PDFInfo
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- CN107036909A CN107036909A CN201710235598.6A CN201710235598A CN107036909A CN 107036909 A CN107036909 A CN 107036909A CN 201710235598 A CN201710235598 A CN 201710235598A CN 107036909 A CN107036909 A CN 107036909A
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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
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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Abstract
The present invention relates to a kind of ring shear test instrument suitable for vertical shearing face, including shear box, jacking system, dynamic rotation system, monitor control system and framework, in shear box, shear plate is fixed on annular bottom plate along annular bottom plate is radially uniform, shear box outer cover cover is buckled on annular bottom plate and shear plate, fixed with annular bottom plate by sliver and guide groove assembling, shear box outer cover is connected with the rotary arm of dynamic rotation system, transmit moment of torsion, shaft coupling pressing plate centering is embedded in the centre bore of the outer cowl top panel of shear box, and normal force loading is carried out by jacking system driving, annular bottom plate centering is nested on cylindrical support platform, under rotating torque effect, interior cylindrical side produced by annular bottom plate drives shear plate progress circular motion is vertical shearing face；The present invention is able to ensure that on shear surface that shear displacemant and distribution of shear stress are uniform, and the thickness in vertical shearing face is unrestricted so that the large-scale ring shear test that bulky grain thing is present is achieved.
Description
Technical field
The present invention relates to a kind of ring shear test instrument, and in particular to a kind of ring shear test instrument suitable for vertical shearing face, category
In soil test engineering device technique field.
Background technology
Direct shear apparatus and simple shear apparatus are the relatively early earthwork test Instruments studied applied to soil body shearing-resistance characteristic.However, both
Being limited in that for instrument can neither realize the soil body shearing test of larger displacement, it is also difficult to shear surface is kept in process of the test
Product is constant.Until the appearance of ring shear apparatus, two above difficult point is just addressed, while also assures that sample can be in continuous displacement
Under the conditions of sheared.
The development of ring shear apparatus starts from 1920s.The ring shear apparatus design concept of early stage is relatively simple, and function compares
It is single, typically it is mainly used in studying residual strength property of the soil body after shear surface generation；Then, scientific and technical development also band
Moved ring shear apparatus update with it is perfect, apparent raising has been obtained in terms of test accuracy first, in addition, the work(of instrument
Variation can be started, since most simple soil strength research can only be carried out and gradually expand to that soil body failure by shear can be carried out
The research of process.During this period, Kyoto Univ Japan marches at the forefront of the world in the research and development field of ring shear apparatus device.Wherein assistant assistant is respectful
The high speed ring shear test instrument that the successes such as two professors are developed, can not only realize computer whole-process control, but also can pass through scene
The altitude simulation (the dynamic load environment such as earthquake, groundwater environment etc.) of geological conditions is sent out to disclose slip-crack surface in process of landslides
Raw stress variation, pore water pressure change and possible liquefaction phenomenon.Most importantly, this ring shear apparatus realizes height
Speed shearing (shear rate is up to 300cm/s), this performance provides experiment base for the research of high-speed shadowgraph technique genesis mechanism
Plinth.
These above-mentioned ring shear apparatus are typically all to be designed based on following characteristics：The normal direction of shear surface and shearing angular speed
Direction vector is parallel.However, this feature can cause following problem：In shear history on whole shear surface angular speed it is consistent,
Displacement difference is cut by causing along on radial direction shear surface, so as to cause shearing stress distribution uneven.
Therefore, designer reduces the shear stress of inside and outside interannular with this generally by the sufficiently small of the thickness design of shearing ring
Gap, and using cutting displacement and shear stress and represent displacement and the stress on whole contact surface at sample center ring, so that
Ignore the uneven caused error of shearing stress distribution.Consequently, it is possible to the shearing face thickness of this type ring shear apparatus is limited to smaller value,
Bulky grain presence is thus not allow in test sample, but often there is the block stone of many big particle diameters in actual sliding soil within landslide zones,
The actual mechanical property that ring shear test is difficult to simulate sliding soil within landslide zones is carried out by existing ring shear apparatus.
The content of the invention
Shear surface shearing stress distribution based on the presence of existing ring shear apparatus is uneven, shearing face thickness is smaller, test sample does not allow
With the presence of the deficiency of bulky grain, the present invention is intended to provide a kind of vertical shearing, i.e. shear plane method of being applied to is to shearing angular speed
The vertical ring shear test instrument of direction vector, available for the peak strength and residual strength of test gravelly soil, carrying out the soil body should soften
Change characteristic research, while the Research on Mechanical Properties suitable for soil under the conditions of big shear displacemant.
Technical scheme that the object of the invention used is realized for a kind of, ring shear test instrument suitable for vertical shearing face, extremely
Include shear box, jacking system, dynamic rotation system and framework less, the shear box includes turning cell and motionless room two parts,
Wherein turning cell includes shear box outer cover, annular bottom plate and more than the 1 piece shear plate placed vertically, and shear plate is along annular bottom plate footpath
To being uniformly fixed on annular bottom plate, shear box outer cover cover is buckled on annular bottom plate and shear plate, the cover of the shear box outer cover
Shell is with annular bottom plate by being arranged at sliver and guide groove assembling fixation therebetween, and the top plate of shear box outer cover is ring flat-plate, its
On offer and shear plate quantity identical shearing board slot, be embedded in for shear plate, the top plate of shear box outer cover and dynamic rotation system
The rotary arm connection of system, transmits moment of torsion；The motionless room includes rubber washer, shaft coupling pressing plate and cylindrical support platform, institute
State shaft coupling pressing plate centering to be embedded in the centre bore of the outer cowl top panel of shear box, and normal force loading carried out by jacking system driving,
The cylindrical support platform is connected with framework, and annular bottom plate centering is nested on cylindrical support platform, and passes through rubber
Packing ring controls the size in gap between the two.
The central protuberance of the cylindrical support platform, annular bottom plate centering is nested on the lug boss, in annular bottom plate
Lower wall ball is provided between the remainder of cylindrical support platform, lower wall ball is contacted with annular bottom plate lower surface.
The jacking system includes hydraulic elevator, frequency converter and hydraulic elevator platform, and hydraulic elevator is fixed on framework,
Lifted by transducer drive hydraulic elevator platform, shaft coupling pressing plate is connected with being arranged at the vertical pivot at hydraulic elevator platform center.
The hydraulic elevator platform is three layers of pyramidal structure, and hydraulic elevator is connected with upper strata, installed on the lower surface of middle level
There is guide rail, bottom table top center is provided with a vertical pivot, and the vertical pivot is connected with shaft coupling pressing plate.
The dynamic rotation system is installed on hydraulic elevator platform bottom, including motor, gear, hollow gear shaft, vertical axis
Hold and upper disk ball, the hollow gear shaft is set on the vertical pivot of hydraulic elevator platform, vertical axis is taken up assigned in therebetween, empty
The lower end of heart gear shaft is connected with rotary arm, upper disk ball be installed on hollow gear shaft top surface and with hydraulic elevator platform
Bottom table top is in contact, and the motor is installed on by sliding block on the guide rail in hydraulic elevator platform middle level, and it is defeated that gear is installed on motor
Engaged on shaft, with hollow gear shaft.
The framework includes base and is fixed on the two root posts of base both sides, and hydraulic elevator is fixed on two root posts
On, the left and right ends on hydraulic elevator platform upper strata have guide hole, and the two root posts for framework are passed through.
Also include monitor control system, monitor control system include controller, signal-transmitting cable, angular displacement sensor,
Rotating torque sensor and more than 2 earth pressure gauges, angular displacement sensor are arranged on rotary arm, rotating torque sensor peace
On middle part gear ring loaded on hollow gear shaft, each earth pressure gauge is uniformly distributed in the soil sample in shear box, angular displacement sensor,
Rotating torque sensor and earth pressure gauge are by signal-transmitting cable access controller, the hydraulic elevator of jacking system and dynamic
The motor of power rotary system controls to run by controller.
The base of the framework is structure as a whole with cylindrical support platform, and draining is provided with the middle part of cylindrical support platform
Groove, the notch surface of rhone is covered with one piece of water filter plate of laying in one layer of felt, groove, and bottom land is connected with drainpipe.
The edge of the frame base is provided with annular groove, is embedded in for the lower end of shear box outer cover.
It is radially even on the lower surface of the shaft coupling pressing plate and on the upper surface of cylindrical support platform to set 2
Above raised line.
As shown from the above technical solution, the ring shear test instrument suitable for vertical shearing face that the present invention is provided, main body includes
Shear box, hydraulic lifting system, dynamic rotation system, five funtion parts of framework and monitor control system, its middle frame are it
The installation of his funtion part provides installation position, the column of the left and right sides of framework, is mainly used in transmission hydraulic lifting system is counter to apply
To its active force, framework is fixed on cement flooring using big model bolt, it is played protection examination in process of the test
Test equipment and the effect of reaction of bearing is provided；Shear box is used for the ring shear test for carrying out soil sample, including turning cell and motionless room
Two parts, shear box outer cover is to rotate transmission member, and shear box outer cover is with annular bottom plate by being arranged at sliver therebetween
Assemble and fix with guide groove, cylindrical support platform is a part for frame base, while be a part of shear box again,
Primarily serve support soil sample and the circular platform of protrusion and shaft coupling pressure in the middle part of the effect of buffer brake, cylindrical support platform are provided
Plate constitute together be radially angularly distributed with the upper and lower interface of motionless room, cylindrical support tabletop of platform it is a plurality of trapezoidal convex
Bar, cylindrical support platform surrounding depression constitutes annular groove, is loaded primarily to meeting and sample consolidation being covered on outside shear box
The decline spaces of Cheng Zhongyou enough；When rotary arm transmits vertical pressure, shear box outer cover can rely on the vertical sliver of madial wall
The guide groove opened up on along annular bottom plate is migrated downwards, and shear plate can rise along shear box outer cover top end face shearing board slot, cut
Cutting plate groove can allow shear plate to pass through along notch, and shaft coupling pressing plate can be produced to bottom offset under the control of hydraulic elevator platform, by
Level applies vertical pressure to soil sample, therefore can realize on the transmission of the consolidation and soil pressure of soil sample, shaft coupling pressing plate bottom surface along footpath
To a plurality of inverted trapezoidal raised line is angularly distributed with, when pushing, on shaft coupling pressing plate bottom surface and in cylindrical support tabletop of platform
Raised line is deeply rolled into the soil body jointly, plays a part of fixed indoor soil sample；When rotary arm provides rotating torque, shearing
Box outer cover is and then rotated together, because the sliver of shear box outer cover madial wall blocks the guide groove of annular bottom plate, and shearing board
Firmly shear box outer cover top end face shearing board slot, therefore annular bottom plate along lower wall ball by with rotating together, turning cell is formed,
Along the radially uniform fixed polylith shear plate of annular bottom plate on annular bottom plate, annular bottom plate centering is nested in the circle of frame base
On pillar support platform, and therebetween provided with a circle elastic tape to control the size in gap between the two, while annular bottom plate
Under be laid with lower wall ball with facilitate annular bottom plate carry out fixed-axis rotation, in this way, rotating torque effect under, annular bottom plate band
Interior cylindrical side produced by dynamic shear plate carries out circular motion is vertical shearing face.
Hydraulic lifting system is connected with framework, including hydraulic elevator, frequency converter and hydraulic elevator platform, left and right hydraulic lifting
Machine is separately mounted on the column of the framework left and right sides, elevation rate of the frequency converter to adjust hydraulic elevator, hydraulic lifting
Platform is in three layers of upper, middle and lower turriform on front view, and upper strata is the thick flat board of cuboid, and its left and right ends has guide hole, for
The two root posts of framework are extended there through, while upper strata two ends are connected with the hydraulic elevator being fixed on upright of frame, can make liquid
Pressure lifting platform is lifted under the driving of hydraulic elevator；Middle level is size with respect to the less flat board in upper strata, with upper strata actually
Guide rail is installed on one, middle level lower surface, horizontally slipped for the motor of dynamic rotation system along guide rail；Bottom is a pressurization
Table top, table top center is welded with a vertical pivot, and the vertical pivot is mutually welded with shaft coupling pressing plate, it is constituted an entirety, plays to shaft coupling pressure
Plate transmits the effect of vertical pressure.
Dynamic rotation system is installed on hydraulic elevator platform bottom, including motor, gear, hollow gear shaft, vertical bearing and
Upper disk ball, hollow gear shaft is a hollow rotary vertical pivot, and its middle part is hollowed out so that foregoing vertical pivot is nested in
Wherein, the vertical bearing with ball is provided with inside hollow gear shaft, hollow gear shaft can be made arbitrarily to be rotated around center vertical pivot, it is empty
Upper disk ball is set at the top of heart gear shaft on end face, and the region being located at hydraulic elevator platform bottom on the outside of vertical pivot directly offsets,
Both the consolidation pressure of hydraulic elevator platform application can have been transmitted, can also hollow gear shaft is rotated freely around vertical pivot；In hollow gear shaft
Portion protrusion gear ring with left and right two motor output shafts on gear be meshed, and by its with rotate hollow gear shaft bottom and
Four equally distributed rotary arm welding, by rotary arm can pass to shear box by rotating torque；Before motor is arranged on
On the guide rail in the text hydraulic elevator platform middle level, mutually nibbled with the gear ring on aforementioned hollow gear shaft by the gear on output shaft
Close, motor can by power pass to hollow gear shaft, when sample carry out early stage consolidation when, motor can slide to two along guide rail
Side, is allowed to separate with hollow gear shaft；When needing to carry out style shearing, motor is needed again along guide rail slid inward, makes electricity
The gear on gear and hollow gear shaft on machine power transmission shaft is progressively engaged, then starts shearing test.
Internal moisture is needed to exclude when being consolidated in view of soil sample, and the present invention is set in the cylindrical support platform of frame base
Rhone is put, the notch surface of rhone is covered with the soil sample being mingled with one layer of felt, groove in one piece of water filter plate of laying, filter water
Grain, bottom land is connected with drainpipe, is mainly played a role in the drainage in soil sample consolidation and shear history；Drainpipe is arranged on framework bottom
In seat, it is connected with draining trench bottom, for the draining during Control experiment.
In addition, the present invention also sets up monitor control system, monitor control system can be used for realizing man-machine interaction, testing crew
Operational control can be carried out to process of the test by controller, while storing the prison with sensor in back-to-back testing by controller
Data are surveyed, the system includes controller, signal-transmitting cable, angular displacement sensor, rotating torque sensor and more than 2 soil pressures
Power meter；Angular displacement sensor is arranged on rotary arm, for measuring the turned angle of shear box in shear history, the sensing
Monitoring Data is fed back to controller by device in time, is stored data so as to controller or is made dependent instruction in time to motor progress
SERVO CONTROL；Rotating torque sensor is installed on the middle part gear ring of hollow gear shaft, is carried for monitoring motor in shear history
The rotating torque of confession, while data can be fed back to controller in time by the sensor, to facilitate controller to store data or timely
Make dependent instruction and SERVO CONTROL is carried out to motor；Earth pressure gauge is divided into four vertical setting of types, and each vertical setting of types respectively has four earth pressure gauges,
From top to bottom equidistantly distributed, four vertical setting of types are laid in the soil sample of the motionless room of shear box in cylinder, are located proximate in setting
Good cylindrical shear surface, the dynamometry face of earth pressure gauge is mainly used in measurement and loads and shear in sample parallel to shear surface
During normal pressure on shear surface, earth pressure gauge can by signal-transmitting cable by the pressure data measured in real time
Controller is fed back to, then controller can carry out SERVO CONTROL to adjust to sample plus unloading to hydraulic elevator platform in time, from
And ensure the normal pressure in sample shear history on vertical shear face and keep constant.
Compared with existing ring shear apparatus, the advantage for the ring shear test instrument suitable for vertical shearing face that the present invention is provided is：
1st, the present invention have devised a kind of experimental rig for producing vertical cylindrical shear surface, and the normal direction of its shear surface is vertical
In shearing angular velocity vector direction.
2nd, while the present invention can realize big displacement shearing and keep the section of shear constant, it can be ensured that cut on shear surface
Cut displacement and distribution of shear stress is uniform, vertical shearing face is rotated by polylith shear plate to be formed, it is vertical in shear history to control
Being formed uniformly for shear breakage, can avoid the shear surface soil body during being cut caused by shear plate is very few or laying is uneven
The uneven phenomenon of destruction.
3rd, the ring shear test instrument suitable for vertical shearing face of the invention provided ring shear test instrument different from the past, this hair
Bright ring shear test instrument is not required the width of shear surface, therefore the size of sample is unrestricted, is applicable to bulky grain soil
The Large Shear experiment of rock mixture, it is easier to simulate the actual mechanical property of sliding soil within landslide zones.
4th, the present invention is configured with computer servo control system, and hydraulic lifting system can be controlled, can be according to examination
Test demand sample is carried out plus unloaded in real time, and Monitoring Data can be received in real time by computer and data are stored up
Deposit.
5th, computer servo-system of the invention, can by receiving the Monitoring Data that rotating torque sensor is fed back,
Dependent instruction is made to motor in time, Torque Control is realized.
6th, computer servo-system of the invention, can by receiving the Monitoring Data that angular displacement sensor is fed back, and
When dependent instruction is made to motor, realize Bit andits control.
7th, computer servo-system of the invention, can be right in time by receiving the Monitoring Data that earth pressure gauge is fed back
Hydraulic elevator platform carries out SERVO CONTROL to adjust to sample plus unloading, so as to ensure the vertical shear face in sample shear history
On that one-level normal pressure keep it is constant.
Brief description of the drawings
The structure chart for the ring shear test instrument suitable for vertical shearing face that Fig. 1 provides for the present invention.
Fig. 2 for Fig. 1 AA to profile.
Fig. 3 for Fig. 1 BB to profile.
Fig. 4 for Fig. 1 CC to profile.
Fig. 5 is the attachment structure figure of annular bottom plate and shear plate.
Wherein, 1- frameworks, 2- hydraulic elevators, 3- frequency converters, 4- gears, 5- angular displacement sensors, 6- shaft coupling pressing plates, 7-
Rubber washer A, 8- shear box outer cover, 9- earth pressure gauges, 10- soil samples, 11- bases, 12- annular grooves, 13- drainpipes, 14- cement
Ground, 15- cylindrical support platforms, 16- lower wall balls, 17- annular bottom plates, 18- rubber washers B, 19- rhone, 20- controls
Device, 21- rotary arms, 22- vertical pivots, 23- hollow gear shafts, 24- rotating torque sensors, the vertical bearings of 25-, 26- columns,
In 27- guide rails, 28- motors, the upper disk balls of 29-, 30- hydraulic elevator platforms, 31- hydraulic elevator platforms upper strata, 32- hydraulic elevator platforms
Layer, 33- hydraulic elevator platform bottoms, 34- shear plates, 35- shearing board slots, 36- guide grooves, 37- slivers, 38- gear rings, 39- guide holes,
40- motor output shafts, 41- felt, 42- raised lines, 43- lug bosses.
Embodiment
The present invention is illustrated in detail with reference to the accompanying drawings and examples, present disclosure is not limited to following
Embodiment.
The ring shear test instrument suitable for vertical shearing face that the present invention is provided, its structure as shown in figure 1, including shear box,
Jacking system, dynamic rotation system, monitor control system and framework 1；
The framework 1 supports whole test structure, including base 11 and the two root posts 26 for being fixed on the both sides of base 11, bottom
The middle part of seat 11 is provided with rhone 19, and the notch surface of rhone 19 is covered with one piece of water filter plate of laying, groove in one layer of felt 41, groove
Bottom is connected with drainpipe 13, for the draining during Control experiment；The edge of the base 11 of framework 1 is provided with annular groove 12, supplies
The lower end insertion of shear box outer cover 8；Framework 1 is fixed on cement flooring 14 using big model bolt, makes it in process of the test
In play a part of protection test equipment and provide reaction of bearing；
Referring to Fig. 3 and Fig. 4, the shear box includes turning cell and motionless room two parts, and wherein turning cell includes shear box
The shear plate 34 that outer cover 8, annular bottom plate 17 and 4 pieces are placed vertically, as shown in figure 5,4 pieces of shear plates 34 along annular bottom plate 17 radially
Equidistantly it is welded on annular bottom plate 17, and its width is equal to the width of annular bottom plate 17, the cover of shear box outer cover 8 is buckled in annular bottom
On plate 17 and shear plate 34,4 vertically arranged slivers of radially even setting on the case inner surface of shear box outer cover 8
37, the edge of annular bottom plate 17 is radially even to open up 4 guide grooves 36 matched with the shape of cross section of sliver 37, guide groove 36
Between adjacent 2 pieces of shear plates 34, shear box outer cover 8 enters luggage with annular bottom plate 17 by the cooperation of the sliver 37 and guide groove 36
With fixation, thus, annular bottom plate 17, shear plate 34 form a whole with shear box outer cover 8, common rotation, shear box outer cover 8
Top plate be ring flat-plate, shearing board slot 35 identical with shear plate quantity and corresponding position is offered thereon, it is embedding for shear plate 34
Enter, and allow shear plate 34 to pass through along notch, the top plate of shear box outer cover 8 and 4 rotary arms 21 of dynamic rotation system
Welding, the welding position of 4 rotary arms 21 is corresponded with the position of sliver 37 or guide groove 36, and is total to diameter, transmission two-by-two
The moment of torsion of dynamic rotation system loads；The motionless room includes shaft coupling pressing plate 6, rubber washer A7, rubber washer B18 and cylinder
Support platform 15, cylindrical support platform 15 is actually a part for frame base 11, and the center of frame base 11 is grand upwards
Rise and constitute the cylindrical support platform 15, the central protuberance of cylindrical support platform 15, the centering of annular bottom plate 17 is nested in this
On lug boss 43, and the size in gap between the two is controlled by rubber washer B18, in annular bottom plate 17 and cylindrical support
Lower wall ball 16 is provided between the remainder of platform 15, lower wall ball 16 is contacted with the lower surface of annular bottom plate 17, the shaft coupling
The centering of pressing plate 6 is embedded in the centre bore of the top plate of shear box outer cover 8, on its lower surface and cylindrical support platform 15 lug boss
Radially even on 43 upper surface to set more than 2 raised lines 42, shaft coupling pressing plate 6 carries out normal force by jacking system driving and added
Carry, can be produced under the control of jacking system to bottom offset, vertical pressure, at the same time, shaft coupling pressure are applied to soil sample 10 step by step
Raised line 42 on plate 6 and lug boss 43 is deeply rolled into the soil body, plays a part of fixed indoor soil sample 10；
The jacking system includes two groups of hydraulic elevators 2, frequency converter 3 and hydraulic elevator platform 30, two groups of hydraulic elevators 2
It is individually fixed in the two root posts 26 of framework 1, drives hydraulic elevator platform 30, the hydraulic elevator platform 30 is three layers of knot of falling tower
Structure, hydraulic elevator 2 is connected with hydraulic elevator platform upper strata 31, and the left and right ends on hydraulic elevator platform upper strata 31 have guide hole
39, the two root posts 26 for framework 1 are passed through, and two guide rails 27, liquid are symmetrically installed with the lower surface of middle level 32 of hydraulic elevator platform
The table top center of bottom 33 of lifting platform is pressed to be provided with a vertical pivot 22, the vertical pivot 22 is connected with shaft coupling pressing plate 6, transmits pressure；
Referring to Fig. 2 and Fig. 3, the dynamic rotation system is installed on the bottom of hydraulic elevator platform 30, including two motors 28, two
Individual gear 4, hollow gear shaft 23, vertical bearing 25 and upper disk ball 29, the hollow gear shaft 23 are set in hydraulic elevator platform
On 30 vertical pivot 22, vertical bearing 25 is assemblied in therebetween, and hollow gear shaft 23 can be made arbitrarily to be rotated around vertical pivot 22, hollow
The lower end of gear shaft 23 is connected with rotary arm 21, upper disk ball 29 be installed on the top surface of hollow gear shaft 23 and with hydraulic pressure liter
The table top of bottom 33 of drop platform is in contact, and the motor 28 is installed on by sliding block on the guide rail 27 in the middle level 32 of hydraulic elevator platform 30,
It can horizontally slip, gear 4 is installed on the output shaft 40 of motor, and be nibbled with the middle part gear ring 38 of hollow gear shaft 23 along guide rail
Close；
The monitor control system includes controller 20, signal-transmitting cable, angular displacement sensor 5, rotating torque sensing
Device 24 and 16 earth pressure gauges 9, angular displacement sensor 5 are arranged on rotary arm 21, for measuring the angle cut in experiment,
Rotating torque sensor 24 is installed on the gear ring 38 of hollow gear shaft 23, for monitoring the rotation that motor is provided in shear history
Power, 16 9 points of earth pressure gauges are 4 vertical setting of types, and each vertical setting of types respectively has four earth pressure gauges, from top to bottom equidistantly distributed, four
Vertical setting of types is laid in the soil sample 10 of the motionless room of shear box in cylinder, is located proximate in the cylindrical shear surface set, angle position
Displacement sensor 5, rotating torque sensor 24 and earth pressure gauge 9 pass through signal-transmitting cable access controller 20, controller 20
Mandatory operation is carried out to hydraulic elevator 2, motor 4 by signal-transmitting cable simultaneously.
The basic process for carrying out large-scale ring shear test using the present invention is as follows：
First, sample is loaded
Firstly the need of operation computer, two motors in left and right is slided to both sides respectively along guide rail, then proceed to operation meter
Calculation machine, control hydraulic elevator, which drives, slowly to be declined.Now lifting platform with shaft coupling pressing plate and shear box outer cover together slowly under
Drop.When shear box outer cover lower edge will be close with sample, it is necessary to be directed at semicircle sliver and the examination of box metal housing inwall
Sample edge is rolled the guide groove (this sample guide groove is corresponding with equidistant 4 guide grooves being provided with annular bottom plate outward flange) come, alignment
Afterwards, slow decline is continued, until metal housing top end face and shaft coupling pressing plate are contacted (because strip is cut with sample top surface completely
The locus of cutting plate groove is just corresponding with four pieces of shear plates, therefore, and shear plate is against on strip shearing board slot just).It
Afterwards, it can transmit vertical pressure by manipulating hydraulic elevator by rotary arm and center vertical pivot, (this loaded to sample
When, the guide groove that shear box outer cover can be opened up by the vertical sliver of madial wall along on annular bottom plate is migrated downwards, and shear plate can edge
Shear box outer cover top end face shearing board slot to rise, shearing board slot can allow shear plate along notch to pass through).Now need soil pressure
Power meter monitors that Primary Assay pressure on shear surface in real time, and will monitor number in time by signal-transmitting cable
According to feeding back to computer.By SERVO CONTROL function of the computer to hydraulic system, hydraulic elevator is adjusted in real time so that soil pressure
The numerical value that power is measured is maintained on the compressive load needed for shearing test.
2nd, shearing test
Pass through the loading of previous step so that the pressure on shear surface is maintained at the pressure lotus needed for shearing test
After in load, it is possible to start shearing test.First, by calculating hands- operation, the motor of left and right two is distinguished along guide rail
Slid inward so that motor output shaft gear is meshed with the gear ring of hollow gear shaft.Then motor is started, by the power of motor
Hollow gear shaft is passed to, hollow gear shaft drives rotary arm and metal housing to start to cut.In shear history, angular displacement is passed
Sensor and torque sensor start Monitoring Data, and feed back to computer in time, to facilitate computer to preserve or make in time phase
Close instruction and SERVO CONTROL is carried out to motor.Earth pressure gauge is all monitored on shear surface in whole shear history in real time
Test pressure, and feed back to computer in time, SERVO CONTROL carried out to hydraulic system in the hope of computer, it is ensured that vertical in experiment
Experiment is kept not changed with value in the test pressure on shear surface.
The innovation of the present invention is the provision of a kind of ring shear test instrument suitable for vertical shearing face, is cut because it is able to ensure that
Shear displacemant and distribution of shear stress are uniform on tangent plane, thus the thickness in vertical shearing face is unrestricted so that bulky grain thing is deposited
Large Shear experiment be achieved.Obviously, those skilled in the art can carry out various changes and deformation to the present invention
Without departing from scope and spirit of the present invention.If but these are changed and deformation belongs to the claims in the present invention and its equivalent skill
In the range of art, then the present invention is also intended to comprising including these changes and deformation.
Claims (10)
1. a kind of ring shear test instrument suitable for vertical shearing face, at least including shear box, jacking system, dynamic rotation system and
Framework, it is characterised in that：The shear box include turning cell and motionless room two parts, wherein turning cell include shear box outer cover,
Annular bottom plate and more than the 1 piece shear plate placed vertically, shear plate are fixed on annular bottom plate along annular bottom plate is radially uniform, cut
Cut box outer cover cover to be buckled on annular bottom plate and shear plate, the case and annular bottom plate of the shear box outer cover are by being arranged at the two
Between sliver and guide groove assembling fix, the top plate of shear box outer cover is ring flat-plate, is offered thereon and shear plate quantity identical
Board slot is sheared, is embedded in for shear plate, the top plate of shear box outer cover is connected with the rotary arm of dynamic rotation system, moment of torsion is transmitted；
The motionless room includes rubber washer, shaft coupling pressing plate and cylindrical support platform, and the shaft coupling pressing plate centering is embedded in outside shear box
In the centre bore of cowl top panel, and normal force loading is carried out by jacking system driving, the cylindrical support platform is consolidated with framework
Even, annular bottom plate centering is nested on cylindrical support platform, and controls by rubber washer the size in gap between the two.
2. the ring shear test instrument according to claim 1 suitable for vertical shearing face, it is characterised in that：The cylinder branch
The central protuberance of platform is supportted, annular bottom plate centering is nested on the lug boss, in its of annular bottom plate and cylindrical support platform
Lower wall ball is provided between remaining part point, lower wall ball is contacted with annular bottom plate lower surface.
3. the ring shear test instrument according to claim 1 suitable for vertical shearing face, it is characterised in that：The jacking system
Including hydraulic elevator, frequency converter and hydraulic elevator platform, hydraulic elevator is fixed on framework, passes through transducer drive hydraulic pressure liter
Platform lifting is dropped, and shaft coupling pressing plate is connected with being arranged at the vertical pivot at hydraulic elevator platform center.
4. the ring shear test instrument according to claim 3 suitable for vertical shearing face, it is characterised in that：The hydraulic lifting
Platform is three layers of pyramidal structure, and hydraulic elevator is connected with upper strata, guide rail is provided with the lower surface of middle level, bottom table top center is set
There is a vertical pivot, the vertical pivot is connected with shaft coupling pressing plate.
5. the ring shear test instrument according to claim 4 suitable for vertical shearing face, it is characterised in that：The dynamic rotation
System is installed on hydraulic elevator platform bottom, including motor, gear, hollow gear shaft, vertical bearing and upper disk ball, described hollow
On vertical pivot of the gear bush loaded on hydraulic elevator platform, vertical axis, which takes up, to be assigned in therebetween, the lower end of hollow gear shaft and rotation
The arm of force is connected, and upper disk ball is installed on hollow gear shaft top surface and is in contact with the bottom table top of hydraulic elevator platform, described
Motor is installed on by sliding block on the guide rail in hydraulic elevator platform middle level, and gear is installed on motor output shaft and hollow gear shaft
Engagement.
6. the ring shear test instrument according to claim 5 suitable for vertical shearing face, it is characterised in that：The framework includes
Base and the two root posts for being fixed on base both sides, hydraulic elevator are fixed in two root posts, the left side on hydraulic elevator platform upper strata
Right two ends have guide hole, and the two root posts for framework are passed through.
7. the ring shear test instrument according to claim 6 suitable for vertical shearing face, it is characterised in that：Also include monitoring control
System processed, monitor control system include controller, signal-transmitting cable, angular displacement sensor, rotating torque sensor and 2 with
Upper earth pressure gauge, angular displacement sensor is arranged on rotary arm, and rotating torque sensor is installed on the middle part of hollow gear shaft
On gear ring, each earth pressure gauge is uniformly distributed in the soil sample in shear box, angular displacement sensor, rotating torque sensor and soil pressure
Power meter by signal-transmitting cable access controller, the hydraulic elevator of jacking system and the motor of dynamic rotation system by
Controller control operation.
8. the ring shear test instrument according to claim 6 suitable for vertical shearing face, it is characterised in that：The bottom of the framework
Seat is structure as a whole with cylindrical support platform, and rhone, the notch surface of rhone are provided with the middle part of cylindrical support platform
One piece of water filter plate of laying in one layer of felt, groove is covered with, bottom land is connected with drainpipe.
9. the ring shear test instrument according to claim 8 suitable for vertical shearing face, it is characterised in that：The frame base
Edge be provided with annular groove, for shear box outer cover lower end be embedded in.
10. the ring shear test instrument according to claim 1 suitable for vertical shearing face, it is characterised in that：The shaft coupling pressure
Equal more than 2 raised lines of radially even setting on the lower surface of plate and on the upper surface of cylindrical support platform.
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| CN201710235598.6A CN107036909B (en) | 2017-04-12 | 2017-04-12 | A kind of ring shear test instrument suitable for vertical shearing face |
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| CN201710235598.6A CN107036909B (en) | 2017-04-12 | 2017-04-12 | A kind of ring shear test instrument suitable for vertical shearing face |
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| CN108225945A (en) * | 2018-02-01 | 2018-06-29 | 福建省地质工程勘察院 | A kind of stacked ring type ring shear apparatus and stacked ring shear test |
| CN108426786A (en) * | 2018-03-21 | 2018-08-21 | 中国地质大学（武汉） | A kind of shear box suitable for vertical ring shear test |
| CN108801804A (en) * | 2018-03-21 | 2018-11-13 | 中国地质大学（武汉） | A kind of vertical shearing face ring scissor test instrument applying confining pressure |
| CN109557023A (en) * | 2018-11-19 | 2019-04-02 | 河海大学 | It is a kind of can self-adapting stretching deformation platen systems and its application method |
| CN111044390A (en) * | 2019-12-30 | 2020-04-21 | 武汉科技大学 | Shear box for testing structural surface anisotropy of rock sample and use method thereof |
| CN112540012A (en) * | 2020-12-04 | 2021-03-23 | 哈尔滨工业大学 | Annular pure shear loading method and device for pipe |
| CN113049399A (en) * | 2021-03-12 | 2021-06-29 | 广西科技大学 | Geosynthetic material multifunctional creep tester and test method thereof |
| CN113237711A (en) * | 2021-04-12 | 2021-08-10 | 中国电建集团华东勘测设计研究院有限公司 | Method for manufacturing sample of barrel-shaped structural surface and externally tangent and internally-blocked barrel-shaped shearing instrument |
| CN117288603A (en) * | 2023-11-24 | 2023-12-26 | 中国电建集团华东勘测设计研究院有限公司 | Up-to-down resistance type multi-layer high-efficiency ring shear tester and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225945A (en) * | 2018-02-01 | 2018-06-29 | 福建省地质工程勘察院 | A kind of stacked ring type ring shear apparatus and stacked ring shear test |
| CN108426786A (en) * | 2018-03-21 | 2018-08-21 | 中国地质大学（武汉） | A kind of shear box suitable for vertical ring shear test |
| CN108801804A (en) * | 2018-03-21 | 2018-11-13 | 中国地质大学（武汉） | A kind of vertical shearing face ring scissor test instrument applying confining pressure |
| CN109557023B (en) * | 2018-11-19 | 2021-02-12 | 河海大学 | Pressure plate system capable of self-adaptive stretching deformation and use method thereof |
| CN109557023A (en) * | 2018-11-19 | 2019-04-02 | 河海大学 | It is a kind of can self-adapting stretching deformation platen systems and its application method |
| CN111044390B (en) * | 2019-12-30 | 2023-03-14 | 武汉科技大学 | Shear box for testing structural surface anisotropy of rock sample and use method thereof |
| CN111044390A (en) * | 2019-12-30 | 2020-04-21 | 武汉科技大学 | Shear box for testing structural surface anisotropy of rock sample and use method thereof |
| CN112540012A (en) * | 2020-12-04 | 2021-03-23 | 哈尔滨工业大学 | Annular pure shear loading method and device for pipe |
| CN112540012B (en) * | 2020-12-04 | 2023-11-14 | 哈尔滨工业大学 | Annular pure shear loading method and device for pipe |
| CN113049399A (en) * | 2021-03-12 | 2021-06-29 | 广西科技大学 | Geosynthetic material multifunctional creep tester and test method thereof |
| CN113049399B (en) * | 2021-03-12 | 2023-11-21 | 广西科技大学 | Multifunctional creep deformation instrument for geosynthetic material and test method thereof |
| CN113237711A (en) * | 2021-04-12 | 2021-08-10 | 中国电建集团华东勘测设计研究院有限公司 | Method for manufacturing sample of barrel-shaped structural surface and externally tangent and internally-blocked barrel-shaped shearing instrument |
| CN117288603A (en) * | 2023-11-24 | 2023-12-26 | 中国电建集团华东勘测设计研究院有限公司 | Up-to-down resistance type multi-layer high-efficiency ring shear tester and application thereof |
| CN117288603B (en) * | 2023-11-24 | 2024-03-08 | 中国电建集团华东勘测设计研究院有限公司 | Up-to-down resistance type multi-layer high-efficiency ring shear tester and application thereof |
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