CN105954119A - Static three-axis torsion shearing destructive property testing device of asphalt mixture - Google Patents
Static three-axis torsion shearing destructive property testing device of asphalt mixture Download PDFInfo
- Publication number
- CN105954119A CN105954119A CN201610465083.0A CN201610465083A CN105954119A CN 105954119 A CN105954119 A CN 105954119A CN 201610465083 A CN201610465083 A CN 201610465083A CN 105954119 A CN105954119 A CN 105954119A
- Authority
- CN
- China
- Prior art keywords
- axle
- pressure chamber
- square
- torsion
- variable speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
The invention belongs to the technical field of experimental testing of anti-shearing mechanical properties of asphalt mixture and discloses a static three-axis torsion shearing destructive property testing device of asphalt mixture. The device is characterized by comprising a testing framework, a torque loading system, an axial force loading system, a confining pressure loading system, a heat preservation system and a testing control system; the device disclosed by the invention can be used for applying axial load and radial confining pressure load while applying torsion load to a test piece so as to generate shearing stress and also so that the test piece is at a complicated stress state at which the test piece continuously rotates in the axial direction of main stress; and meanwhile, an environment testing environment is controlled and actual stress condition and damage process of the asphalt mixture under the action of traffic load can be really simulated.
Description
Technical field
The invention belongs to asphalt shearing resistance mechanical property test technical field of measurement and test, relate to a kind of Colophonium
The static three axle torsional shear destructive characteristics assay devices of compound, are that a kind of asphalt is multiple at triaxial torsion
Failure by shear strength detection under miscellaneous stress state and middle hot environment.
Background technology
Under Summer High Temperature environment and local function, usual friendship road access mouth, bus stop station, abrupt slope
The bituminous paving in the sections such as hairpin curve, interchange ramp mouth easily produces motive rut damage disease, and it is direct
Reason is that stability at high temperature of asphalt mixture is not enough, and shear behavior is to affect asphalt heat stability
Key factor.As tension, comprcssive strength, shear strength of asphalt mixture belongs to asphalt pavement material
Basic mechanical design feature index.
The test method being currently used for testing shear strength of asphalt mixture performance has triaxial compression test, single shaft
Penetration test, coaxial shear test, simple shear test (SST), gyratory compaction and testing shear performance, torsion
Turn shearing test, oblique scissor test etc..
Triaxial compression test based on mole-coulomb strength theory, by test determination asphalt cohesive force c,
Internal friction angleTwo material parameters, by mole-coulomb strength modelIt is calculated the plane of fracture
On maximum shear stress, wherein σ is the compressive stress of plane of fracture vertical direction.Triaxial compression test comes from ground work
The shear behavior test of journey material, its method is highly developed.It is controlled that its subject matter is the absence of actively applying
Shear stress τ, the test specimen principal direction of stress when stress the most constant (or in 180 sudden changes).
Uniaxial penetration test, coaxial shear test method are proposed by Tongji University, are developed and answered in recent years
With.The theoretical basis of uniaxial penetration shear strength test is based on elastic semo-infinite under single circle Uniform Load
The maximum shear stress of body, obtains the shear stress parameter of the method by mechanical analysis；Its test method is to utilize
Asphalt cylinder test specimen is pressurizeed until destroying by the steel column pressure head of special diameter, it is thus achieved that the most greatly
Pressure pressure P, in conjunction with the calculated results use computing formula obtain asphalt cohesive force c, in rub
Wipe angleMaterial parameter.Test proves, the shear strength that this test obtains is basic with threeaxis test results and rule
Unanimously.The subject matter of uniaxial penetration test is a lack of the simulation to actual traffic load level power effect；With
Triaxial test is similar, and test specimen entirety stress feature is that principal direction of stress keeps constant.
Coaxial shear test uses the hollow circular cylinder asphalt examination of external diameter Φ 150mm, internal diameter Φ 55mm
Part, is pasted onto test specimen between outer steel cylinder and interior steel column with epoxy resin；During test, outer steel cylinder is fixed, right
Steel column applies xial feed, by steel column ring shape binding face by shear action cylinder inside test specimen, and tries
Outside part, cylinder is limited, and test specimen is destroyed by shear action.Test loading can complete in Material Testing Machine,
Controlling test, data acquisition are more convenient, have preferable test accuracy and stability, and static, dynamically try
Test and all can conveniently carry out.The subject matter of coaxial shear test is, makes test specimen medial surface be subject to by applying pressure
To shear action, test specimen entirety lacks pressurized effect, differs greatly with actual bituminous paving stress.
Simple shear test (SST) is American Highway strategic research plan (SHRP) Superpave Pavement Design phase
The testing shear performance method answered, uses cantilever beam mechanical model, and bitumen mixture specimen bottom face is fixed,
Top end face bears horizontal shear load action, can carry out quiet, dynamic test.Class is tested with aforementioned coaxial shear
Seemingly, the pure shear effect of simple shear test (SST) main analog asphalt, additionally non-because of testing equipment
Chang Anggui, application at home and abroad is seldom.
Gyratory compaction and testing shear performance are to make asphalt in test chamber or show in mix factory, construction
Field sampling obtains compound；Debug and set pressure at right angle p during GTM gyratory compaction, testing machine is set
Initial rotation angle θα；According to the difference of die trial diameter, select corresponding metal calibrating block, to height sensor
Demarcate；Set test temperature, and carry out heating and thermal insulation.
GTM can be come by a kind of mode in poised state, revolution, height of specimen and the Sample density of setting
Automatically control test process.Being typically chosen poised state is test method, and process of the test Computer shows not
With bitumen mixture specimen density corresponding to gyratory compaction number of times, highly, the change curve such as wheel load, temperature,
Test specimen reaches GTM autostop after poised state set in advance, finally needs to carry out frictional force measuring.Logical
Cross calculate the Sample density obtained under different rotary number of machine passes, gyratory compaction index, spin stabilization index,
Rotational shear strength, the shear strength of asphalt mixture factor etc..
Rotary shear failure performance determination test device of asphalt mixture is that applicant is acquired authorizes invention specially
Profit (ZL201310159058.6), uses this assay device can carry out the examination of asphalt torsional shear destructive characteristics
Test, it is thus achieved that asphalt peak shear strength.It is characterized in: (1) acts on the test specimen of axial symmetry cross section
Moment of torsion only produces pure shear deformation, can obtain pure shear Simple stress condition, it is simple to measure；Compared to tension and compression
Deformation, torsional deflection can be the infinitely great restriction being not substantially affected by test space in theory, and test takies relatively
The little test space.Its major defect is: because lacking axial compressive force, and test test specimen is in pure shear stress shape
State, its maximum tension stress is equal with maximum shear stress, for tensile strength less than the material of shearing strength, tries
Part is by tensile failure rather than sheared destruction.
Tiltedly scissor test is to use make specially tiltedly to cut fixture, passes through in the Material Testing Machine such as MTS, UTM
Axially ballast realizes shearing and loads.After test specimen is fixed by fixture, test specimen cross section loads axle with Material Testing Machine
Line angled (θ), when testing machine applies compressive load by fixture to test specimen, along cutting of test specimen cross section
Line direction (shear surface) and normal direction all produce certain active force, complete load test.
Inclined-plane shearing test comes from " highway engineering building stones testing regulations " building stones shear strength test, and it loads
Mode relatively meets the shearing situation that actual wheel road pavement applies.After determining optimal shear blade spacing by test,
The development of maximum shear strength of asphalt can be drawn.
Under actual traffic load (mobile vehicle) effect, in asphalt pavement structural layer there is consecutive variations in arbitrfary point
Shear stress, be in the triaxial state of stress of complexity, stress path in " heart-shaped " full curve, main answer
Power axle is the most rotationally-varying.Obviously, for truly simulating the ground surface material stress under action of traffic loading,
Test must take into and directly apply controllable continuous shear stress stress load.Current assay device and test
Method, all can not realize the true simulation of ground surface material stress under action of traffic loading.
Summary of the invention
The invention provides the static three axle torsional shear destructive characteristics assay devices of a kind of asphalt.This sets
Putting inside and outside double-layer heat insulation environment, pressure chamber is internal layer heat-preserving equipment, in test preparation, test specimen installation process
Thermal environment is provided；Outer layer thermal environment provides the insulation effect in process of the test.Assembly of the invention can be only
Vertical or combination applies confined pressure, axial compression and torsion load, and test test specimen is in the triaxial torsion stress state of complexity,
Principal stress rotates continuously.At least include that 3 kinds of Load Combinations apply modes: constant confining pressure, axial compression, then apply to turn round
Turn load；Constant confining pressure, torsion load, then apply axial compression；Constant confining pressure, more in proportion apply axial compression and
Torsion load.Different loads apply mode, can simulate different failure modes.Applying moment of torsion load side
Between test specimen die trial upper end and entablature, double layer planar ball bearing is set, while transmission shaft pressuring load
Release torsion load, does not transmits, is not subject to torsion load；Load axle lower end in axial compression and square-section section be set,
Torsion load is born by the square hole of sill.Using non-composite sensor, torque sensor, axle power sense
Device is kept completely separate, and moment of torsion, axle load effect are independent of each other, and both mate without range.Use spring as axially
The buffer unit that load applies.
The technical solution used in the present invention is as follows:
The static three axle torsional shear destructive characteristics assay devices of a kind of asphalt, including test framework, torsion
Square loading system, axle force loading system, confined pressure loading system, heat-insulation system and experiment control system.
Described test framework include pedestal upright post, base shelf, base deck, door frame column, entablature,
Rubber mat plate, steel plate square washer, sill and sill lowering or hoisting gear；Wherein base shelf is used for fixing
No. two variable speed electric motors, particularlies and No. three variable speed electric motors, particularlies, door frame column is fixed on base deck, and sill passes through two
A number linear bearing is placed on two door frame columns, can the most slidably, and entablature stands with door frame
Post is fixing to be connected, and rubber mat plate is fixed on below entablature, and steel plate square washer is fixed on sill；Base
Shelf, base deck, entablature, sill are all horizontally mounted, the vertical right angle setting of door frame column.
Sill lowering or hoisting gear by No. three variable speed electric motors, particularlies, No. three motor brake devices, No. three motor vertical screw,
No. three motor vertical screw circular shaft sections, No. seven contiguous blocks and connection support composition；No. three variable speed electric motors, particularly levels are solid
On base shelf, No. three motor vertical screw are connected with the swing pinion of No. three variable speed electric motors, particularlies, and No. two straight
Bobbin holds and is fixed on base deck, and No. three motor vertical screw circular shaft sections pass base through No. two linear bearings
Top board, No. three motor vertical screw circular shaft section tops are detachably fixed with No. seven contiguous blocks and are connected, and connect support
Being detachably fixed with No. seven contiguous block lower ends and be connected, connection support is detachably fixed with sill and is connected.
Torque loading system by spiral frame, motor, torque-measuring apparatus, torsion angle measurement apparatus,
Moment of torsion loads axle and torque releasing apparatus composition；Spiral frame is by spiral framework pillar, rotating handles, spiral
Housing slide block, a contiguous block composition, wherein spiral frame is fixed on entablature by spiral framework pillar
On, a contiguous block is fixed on spiral frame sliding shoe；A number motor is by a variable speed electric motors, particularly, an electricity
Machine brake, a motor output shaft composition, wherein a variable speed electric motors, particularly is fixed on a contiguous block, and one
Number motor brake device is fixed on a variable speed electric motors, particularly；Torque-measuring apparatus is by No. two contiguous blocks, torque sensings
Device forms, and wherein the circular shaft of No. two contiguous blocks is detachably solid by the output shaft of shaft coupling and a variable speed electric motors, particularly
Fixed connection, torque sensor and No. two contiguous blocks are detachably fixed connection；Torsion angle measurement apparatus is by fixing
Frame, corner displacement sensor urceolus, corner displacement sensor inner core form, and wherein fixed support is detachably solid
On entablature, corner displacement sensor inner core is enclosed within moment of torsion loading axle circular shaft section and the most solid
Fixed connection；Torque releasing apparatus by a Plane Ball bearing, No. three contiguous blocks, spring, No. four contiguous blocks,
No. two Plane Ball bearing compositions, wherein the lower panel of No. two Plane Ball bearings is embedded in the upper of test specimen upper testing mould
In end groove, the top panel of No. two Plane Ball bearings and the lower end of spring are embedded in No. four contiguous blocks respectively
In upper and lower end groove, the upper end of spring and a Plane Ball bearing lower panel are embedded in No. three connections respectively
In the upper and lower end groove of block, the top panel of a Plane Ball bearing is embedded in the low groove of pressure chamber top board；
Moment of torsion loads axle and is added by moment of torsion loading axle square groove, moment of torsion loading axle circular shaft section, Horizontal axle bearing, moment of torsion
Carrying axle square tenon composition, wherein moment of torsion loading axle square groove is connected with the square shaft plug-in type of torque sensor,
Horizontal axle bearing is detachably fixed and is installed on entablature, and moment of torsion loads axle circular shaft section and sequentially passes through horizontal bearing
Seat, entablature, rubber mat plate, pressure chamber top board piston bush, pressure chamber top board, Plane Ball bearing,
No. three contiguous blocks, spring, No. four contiguous blocks, No. two Plane Ball bearings, load axle side finally by moment of torsion
Shape tenon is connected with the groove plug-in type of test specimen upper testing mould upper end.
Axle force loading system by No. two variable speed electric motors, particularlies, No. two motor brake devices, No. two motor vertical screw, two
Number motor vertical screw circular shaft section, No. six contiguous blocks, pressure transducer, No. five contiguous blocks, axial compressions load axles
Composition；Wherein No. two variable speed electric motors, particularly levels are fixed on base shelf, and No. two motor brake devices are arranged on No. two
On variable speed electric motors, particularly, No. two motor vertical screw are connected with the swing pinion of No. two variable speed electric motors, particularlies, and No. two motors hang down
Straight screw rod circular shaft section is by No. three linear bearings through base deck, and No. three linear bearings are fixed on base deck,
No. two motor vertical screw circular shaft section tops are detachably fixed with No. six contiguous block lower ends and are connected；Pressure transducer
It is embedded in No. six contiguous block upper ends and No. five contiguous block lower ends；Axial compression loads axle and is loaded square section of axle, axle by axial compression
Pressure loads axle circular shaft section and axial compression loads axle square tenon composition, and wherein axial compression loads the square tenon of axle and test specimen
The detachable fixing connection of square groove of lower testing mould lower end, axial compression loads square section of axle and sequentially passes through downwards pressure
Power room base plate, pressure chamber base plate piston bush, steel plate square washer, sill, sill square opening, connection
Frame, the lower end of last axial compression square section of axle of loading is detachably fixed with the groove of No. five contiguous blocks and is connected；Wherein,
It is that plug-in type is connected with sill square opening that axial compression loads square section of axle, and axial compression loads square section of axle can sill
In square opening vertically movable, but can not reverse.
Confined pressure loading system is added unloading control by pressure chamber, confined pressure liquid in-out pipe, press-in connection valve, a confined pressure
Device processed forms；Wherein pressure chamber is by pressure chamber base plate, pressure chamber top board, pressure chamber outer wall, pressure chamber column
Bolt forms, and pressure chamber base plate is detachably secured on steel plate square washer, pressure chamber outer wall and pressure chamber base plate,
Groove and seal washer on pressure chamber top board removably connect, and pressure chamber upstanding studs is detachably fixed connection
Pressure chamber base plate and pressure chamber top board；Confined pressure liquid in-out pipe two ends add the connection of unloading controller respectively with confined pressure
Valve, a press-in connection valve removably connect, and a press-in connection valve is positioned on pressure chamber base plate.
Temperature control system is by program control type high-low temperature test chamber, thermostatic water bath, circulating pump, No. three press-in connection
Valve, outer layer insulation feed tube, outer layer insulation drain pipe, No. two press-in connection valves, internal layer insulation feed tube,
Internal layer insulation drain pipe, internal layer couveuse, outer layer couveuse, pressure seal valve, internal layer temperature sensor,
Exospheric temperature sensor forms；No. two press-in connection valves, pressure seal valve and lay respectively at pressure chamber base plate, pressure
On power ceiling plate, internal layer temperature sensor is positioned at internal layer couveuse upper and lower end, exospheric temperature sensor position
Upper and lower end in outer layer couveuse；Internal layer couveuse is made up of pressure chamber, outside outer layer couveuse is by pressure chamber
Wall, outer layer couveuse outer wall, pressure chamber base plate form, and its ectomesoderm couveuse outer wall is sealingly fastened in pressure
On the base plate of room；Outer layer insulation feed tube, outer layer insulation drain pipe, internal layer insulation feed tube, internal layer are incubated out
Liquid pipe is connected with circulating pump and No. two press-in connection valves, No. three press-in connection valves respectively, circulating pump pass through into,
Drain pipe is connected with thermostatic water bath, and thermostatic water bath is installed in program control type high-low temperature test chamber.
Experiment control system by computer, the integrated transducer of USB/RS232/485, converter, No. two
Converter, No. three converters, program control relay compositions；Computer passes through holding wire and USB/RS232/485
Integrated transducer connect, the integrated transducer of USB/RS232/485 by holding wire respectively with a converter,
No. two converters, No. three converters, program control relay, temperature sensor, temperature sensor and program control type
High-low temperature test chamber connects；Program control relay passes through holding wire and motor brake device, No. two motor brakes
Device, No. three motor brake devices connect, shaft position sensor (84), No. two shaft position sensors (85)
For the reserved sensor measuring axial displacement, transducer integrated with USB/RS232/485 is connected respectively.
Apparatus of the present invention, while test test specimen is applied torsion load generation torsional shear stress, apply axle
To load and radial direction confined pressure load, test test specimen is made to be in the complex stress shape that principal axes of stress direction rotates continuously
State, controls environmental testing temperature simultaneously, can truly simulate the reality of asphalt under action of traffic loading and be subject to
Power state and destructive process.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of apparatus of the present invention.
In figure: 1 rotating handles；2 spiral framework pillars；3. spiral frame sliding shoe；4. a contiguous block；
5. a motor brake device；6. a variable speed electric motors, particularly；7. a motor output shaft；8. shaft coupling；
9. No. two contiguous blocks；10 torque sensors；11 moments of torsion load axle square groove；12 fixed supports；
13 corner displacement sensor urceolus；14 corner displacement sensor inner cores；15 Horizontal axle bearings；
16 moments of torsion load axle circular shaft section 17 pressure chamber top board 18 pressure chamber top board piston bush 19 entablature；
20 rubber mat plates；21 test specimen upper testing moulds；22 test specimen lower testing moulds；No. 23. Plane Ball bearings；
24. No. three contiguous blocks；25 springs；26. No. four contiguous blocks；27. No. two Plane Ball bearings；
28 pressure chamber upstanding studs；29 bitumen mixture specimens；30 pressure chamber outer walls；31 outer layer couveuse outer walls；
32 axial compressions load the square tenon of axle；33 axial compressions load axle circular shaft section；34 moments of torsion load the square tenon of axle；
35 internal layer temperature sensors；36 exospheric temperature sensors；37 pressure chamber base plate piston bush；
38 pressure chamber base plates；39 steel plate square washers；40 door frame columns；41 sills；42. No. two linear bearings；
43 sill square openings；44. No. five contiguous blocks；45 axial compressions load square section of axle；46 pressure seal valve；47
Pressure transducer；48. No. six contiguous blocks；49 connect support；50. No. two press-in connection valves；
51. No. seven contiguous blocks；52. No. three motor vertical screw circular shaft sections；53. No. three motor vertical screw；
54 base deck；55. No. three linear bearings；56. No. two motor vertical screw circular shaft sections；
57. No. two motor vertical screw；58. No. two motor brake devices；59. No. two variable speed electric motors, particularlies；
60. No. three variable speed electric motors, particularlies；61. No. three motor brake devices；62 base shelves；63 pedestal upright post；
64. No. four linear bearings；65. No. two converters；No. 66. converters；67 program control relays；
68 confined pressures add unloading controller；69. No. three converters；70 program control type high-low temperature test chambers；71 thermostatic water bath；
72 circulating pumps；73 outer layer insulation drain pipes；74 outer layer insulation feed tubes；
The integrated transducer of 75USB/RS232/485；76 computers；77 confined pressure liquid in-out pipes；78. No. three connection valves；
No. 79. press-in connection valves；80 internal layer insulation drain pipes；81 internal layer insulation feed tubes；No. 82. slide rails；
83. No. two slide rails, 85. No. two shaft position sensors of No. 84. shaft position sensors
Detailed description of the invention
The specific embodiment of the present invention is described in detail below in conjunction with technical scheme and accompanying drawing.
As it is shown in figure 1, the static three axle torsional shear destructive characteristics assay devices of a kind of asphalt.This dress
When putting work, make bitumen mixture specimen 29, start program control type high-low temperature test chamber 70, make thermostatic water bath
The temperature of 71 inside holding liquid reaches test determination requirement；Put together with test specimen upper testing mould 21, test specimen lower testing mould 22
In thermostatic water bath 71, carry out maintenance by test determination temperature and time.
Sill 41 is installed fixing steel plate square washer 39, at entablature, fixing rubber mat plate is installed for 19 times
20, entablature 19 is installed fixing spiral frame and a motor, base shelf 62 is installed fixing
No. two motors and No. three motors.
Install that No. seven contiguous blocks 51 and No. three motor vertical screw circular shaft sections 52 are fixing to be connected, install to connect and prop up
Frame 49 is fixing with sill 41 to be connected；The output services frequency of No. three converters 69 is controlled by computer 76,
Make No. three motor vertical screw 53 lift, sill 41 is moved to correct position.
Controlled the output services frequency of No. two converters 65 by computer 76, make No. two motor vertical screw 57
After dropping to correct position, install No. six the most successively on No. two motor vertical screw circular shaft section 56 tops
Contiguous block 48,47, No. five contiguous blocks 44 of pressure transducer；No. three converters 69 are controlled again by computer 76
Output services frequency, make No. three motor vertical screw 53 decline, mobile sill 41 to correct position.
Axial compression is loaded axle sequentially pass through downwards for square section 45 steel plate square washer 39, sill square opening 43,
Connect support 49, make axial compression load square section of axle 45 lower ends and insert in the upper recess of No. five contiguous blocks 44 also
Fixing connection；Then pressure chamber base plate 38, outer layer couveuse outer wall 31 are fixedly mounted on steel plate square washer
On 39, wherein need that axial compression is loaded axle circular shaft section 33 and be inserted in pressure chamber base plate piston bush 37, make axial compression add
Carry axle circular shaft section 33 to enter in pressure chamber through pressure chamber base plate 38；Pressure chamber base plate 38 lays pressure
Chamber outer wall 30.
Take out bitumen mixture specimen 29 and test specimen upper testing mould 21, test specimen lower testing mould 22, by test specimen lower testing mould
The groove of 22 lower ends is fixing with the axial compression loading square tenon of axle 32 to be connected；Test specimen upper testing mould 21 is pacified successively
Fill 27, No. four contiguous blocks 26 of No. two Plane Ball bearings, spring 24, plane of 25, No. three contiguous blocks
Ball bearing 23, then covers pressure chamber top board 17；Finally lay pressure chamber upstanding studs 28 and tighten solid
Fixed, pressure chamber and outer layer couveuse installation.
Controlled the output services frequency of No. three converters 69 by computer 76, make No. three motor vertical screw 53
Rise, promote sill 41 to rise, until pressure chamber top board 17 holds out against with rubber mat plate 20, entablature 19,
Stop No. three motor vertical screw 53 to rise；The output services of No. two converters 65 are controlled again by computer 76
Frequency, makes No. two motor vertical screw 57 rise, thus promotes axial compression to load axle and rise, and promotes test specimen simultaneously
Lower testing mould 22, bitumen mixture specimen 29, test specimen upper testing mould 21 and torque releasing apparatus rise, until turning round
Number Plane Ball bearing 23 top panel of square release device is with the groove of pressure chamber top board 17 inner bottom part just
Contact, computer 76 controls No. two motor vertical screw 57 and stops rising, simultaneously by program control relay 67
Controlling No. two motor brake devices 58 to work, the locking of No. two motor vertical screw 57, it is vertically solid that axial compression loads axle
Fixed.
Start circulating pump 72, by internal layer insulation feed tube 81, internal layer insulation drain pipe 80, outer layer be incubated into
Liquid pipe 74, outer layer insulation drain pipe 73 perfusion insulation liquid, Colophonium in pressure chamber and in outer layer couveuse respectively
Compound test specimen 29 is incubated by internal layer couveuse, it is desirable to fill insulation liquid in pressure chamber.
Rotate rotating handles 1, make 3, contiguous block 4 of spiral frame sliding shoe and a slide rail 82 increase,
A variable speed electric motors, particularly 6 is driven to rise to correct position；Horizontal axle bearing 15 is fixedly mounted on entablature 19
On.
Moment of torsion is loaded axle circular shaft section 16 and sequentially passes through downwards Horizontal axle bearing 15, entablature 19, rubber blanket
Plate 20, pressure chamber top board piston bush 18,23, No. three companies of 17, Plane Ball bearing of pressure chamber top board
Connect block 24, spring 26, No. two Plane Ball bearings 27 of 25, No. four contiguous blocks, finally make moment of torsion load axle
Square tenon 34 is connected with the square groove plug-in type of test specimen upper testing mould 21 upper end.
The inner core 14 of corner displacement sensor is enclosed within moment of torsion load axle end, circular shaft section 16 upper end and consolidate therewith
Fixed connection, then 13, No. two slide rails 83 of the urceolus of installing angle displacement transducer and fixed support 12；Will
The measurement square shaft of torque sensor 10 inserts moment of torsion and loads in axle square groove 11, on torque sensor 10
No. two contiguous blocks 9 fixing connection are installed；The vertical position of a variable speed electric motors, particularly 6 is adjusted by a slide rail 82
Put so that a motor output shaft 7 is the most just contacted with the circular shaft of No. two contiguous blocks 9, use shaft coupling
Device 8 is connected fixing with the circular shaft of No. two contiguous blocks 9 for a motor output shaft 7.
Two No. two press-in connection valves 50 on closing presure room base plate 38, pressure chamber top board 17, internal layer is protected
Incubator insulation liquid stops circulation；Then controlled confined pressure by computer 76 to add unloading controller 68 and entered by confined pressure
77, press-in connection valve 79 feed liquor in pressure chamber of drain pipe so that in pressure chamber, confined pressure presses given pace
Increase, until it reaches stopping during the confined pressure of test determination, bitumen mixture specimen 29 bears the footpath of test determination
To and axial compressive force；Being subject to vertical uneven hydraulic action because moment of torsion loads axle square tenon 34 end face, moment of torsion adds
Carrying axle will rise therewith, and drive angle displacement measuring device to rise along No. 2 slide rails, a motor is along a cunning
Rail is vertically raised；The stopping means work of a slide rail need to be started in good time, make moment of torsion load axle and no longer rise also
It is maintained at suitable vertical position.
Controlled the output services frequency of No. two converters 65 by computer 76, make No. two motor vertical screw 57
Rise, thus promote axial compression to load axle, test specimen lower testing mould 22, bitumen mixture specimen 29, test specimen upper testing mould
21,27, No. four contiguous blocks 26 of No. two Plane Ball bearings rise, and spring 25 is compressed, and Colophonium mixes simultaneously
Close material test specimen 29 by shaft pressuring load effect, until it reaches during the shaft pressuring load of test determination, No. two motors are vertical
Screw rod 57 rises and stops, and now requires that axial compression loads axle and must be positioned in sill square opening 43 for square section 45；
During axial compression applies, being compressed with spring 25 and test specimen upper testing mould 21 is gradually increasing, moment of torsion loads
Axle square tenon 34 end face moves closer to test specimen upper testing mould 21 upper end square groove, closes the most in good time
Close the vertical limit device of a slide rail 32；At the end of axial compression and confined pressure load, it is desirable to moment of torsion loads axle side
Shape tenon 34 is connected with test specimen upper testing mould 21 upper end square groove just plug-in type, and starts a slide rail 32
Vertical limit device, fix a motor and moment of torsion and load the vertical position of axle.
The output services frequency of a converter 66 is controlled, automatically a number speed change electricity of manipulation by computer 76
The output shaft direction of rotation of machine 6 and rotary speed, load the square tenon of axle 34 by moment of torsion and made by torsion load
For the square groove of test specimen upper testing mould 21 upper end, then by test specimen upper testing mould 21 by Torsional Loading in
Bitumen mixture specimen 29, until the output shaft of a number variable speed electric motors, particularly 6 stops when bitumen mixture specimen 29 destroys
Spline is moved；During moment of torsion load applies, it is embedded in sill square opening 43 for square section 45 because axial compression loads axle
In, axial compression loads the rotation of axle and automatically spends restrained, loads square section 45 fixing test specimen being connected of axle with axial compression
Lower testing mould 22 torsional freedom suffers restraints accordingly, so that the torsion of bitumen mixture specimen 29 lower end
Degree of freedom is fixed.
Computer 76 monitors in real time, record torque sensor 10, pressure transducer 47, confined pressure add unloading control
The confined pressure of device 68 processed, internal layer temperature sensor 35, exospheric temperature sensor 36, angle displacement measuring device
The measurement data such as rotational displacement, and each measurement data obtains the moment accordingly；Computer 76 can be painted in real time
M-torque curve figure time processed, time m-torsional angular displacement figure, time m-axial force diagram, time m-confined pressure figure, and automatically
Arrange and form torsional angular displacement-torque curve figure, torsional strain-torsional shearing stress figure etc..
Claims (3)
1. the static three axle torsional shear destructive characteristics assay devices of asphalt, it is characterised in that: include test
Framework, torque loading system, axle force loading system, confined pressure loading system, heat-insulation system and experiment control system；
Described test framework includes pedestal upright post (63), base shelf (62), base deck (54), door
Erect post (40), entablature (19), rubber mat plate (20), steel plate square washer (39), sill (41)
And sill lowering or hoisting gear；Wherein base shelf (62) is used for fixing No. two variable speed electric motors, particularlies (59) and No. three
Variable speed electric motors, particularly (60), door frame column (40) is fixed on base deck (54), and sill (41) passes through
Two No. one linear bearing (42) is placed on two door frame columns (40), can the most slidably,
Entablature (19) is fixing with door frame column (40) to be connected, and rubber mat plate (20) is fixed on entablature (19)
Lower section, steel plate square washer (39) is fixed on sill (19)；Base shelf (62), base deck (54),
Entablature (19), sill (40) are all horizontally mounted, the vertical right angle setting of door frame column (40)；Lower horizontal stroke
Lifting device of girder by No. three variable speed electric motors, particularlies (60), No. three motor brake devices (61), No. three motor vertical screw (53),
No. three motors vertical screw circular shaft section (52), No. seven contiguous blocks (51) and connection support (49) composition；Three
Number variable speed electric motors, particularly (60) level is fixed on base shelf (62), and No. three motor vertical screw (53) are with three
The swing pinion of number variable speed electric motors, particularly (60) connects, and No. two linear bearings (64) are fixed on base deck (54)
On, No. three motors vertical screw circular shaft section (52) pass base deck (54) through No. two linear bearings (64),
No. three motor vertical screw circular shaft section (52) tops are detachably fixed with No. seven contiguous blocks (51) and are connected, and connect
Support (49) is detachably fixed with No. seven contiguous block (51) lower ends and is connected, and connects support (49) and sill
(40) it is detachably fixed connection；
Torque loading system is by spiral frame, motor, torque-measuring apparatus, torsion angle measurement apparatus, a torsion
Square loads axle and torque releasing apparatus composition；Spiral frame by spiral framework pillar (2), rotating handles (1),
Spiral frame sliding shoe (3), contiguous block (4) composition, wherein spiral frame passes through spiral framework pillar
(2) being fixed on entablature (19), a contiguous block (4) is fixed on spiral frame sliding shoe (3)；
A number motor is by a variable speed electric motors, particularly (6), motor brake device (5), motor output shaft (7) group
Becoming, wherein a variable speed electric motors, particularly (6) is fixed on a contiguous block (4), a motor brake device (5)
It is fixed on a variable speed electric motors, particularly (6)；Torque-measuring apparatus is by No. two contiguous blocks (9), torque sensor (10)
Composition, wherein defeated by shaft coupling (8) and a variable speed electric motors, particularly (6) of the circular shaft of No. two contiguous blocks (9)
Shaft (7) is detachably fixed connection, torque sensor (10) and No. two contiguous block (9) companies of being detachably fixed
Connect；Torsion angle measurement apparatus is passed by fixed support (12), corner displacement sensor urceolus (13), corner displacement
Sensor inner core (14) forms, and wherein fixed support (12) is removably fixed on entablature (19), corner
Displacement transducer inner core (14) is enclosed within moment of torsion loading axle circular shaft section (16) and above and is detachably fixed connection therewith；
Torque releasing apparatus by a Plane Ball bearing (23), No. three contiguous blocks (24), spring (25), No. four
Contiguous block (26), No. two Plane Ball bearings (27) composition, wherein No. two Plane Ball bearings (23)
Lower panel is embedded in the upper recess of test specimen upper testing mould (21), the top panel of No. two Plane Ball bearings (23)
And the lower end of spring (25) is embedded in the upper and lower end groove of No. four contiguous blocks (26) respectively, spring (25)
Upper end and Plane Ball bearing (23) lower panel be embedded in the upper and lower of No. three contiguous blocks (24) respectively
In end groove, the top panel of a Plane Ball bearing (23) is embedded in the low groove of pressure chamber top board (17)；
Moment of torsion loads axle and is loaded axle square groove (13), moment of torsion loading axle circular shaft section (16), Horizontal axle bearing by moment of torsion
(15), moment of torsion loads the square tenon of axle (34) composition, wherein moment of torsion loading axle square groove (11) and torsion
The square shaft plug-in type of square sensor (10) connects, and Horizontal axle bearing (15) is detachably fixed and is installed on entablature
(19) on, moment of torsion load axle circular shaft section (16) sequentially pass through Horizontal axle bearing (15), entablature (19),
Rubber mat plate (20), pressure chamber top board piston bush (18), pressure chamber top board (17), a Plane Ball axle
Hold (23), No. three contiguous blocks (24), spring (25), No. four contiguous blocks (26), No. two Plane Ball bearings
(27), the square tenon of axle (34) is loaded finally by moment of torsion slotting with the groove of test specimen upper testing mould (21) upper end
Enter formula to connect；
Axle force loading system is vertical by No. two variable speed electric motors, particularlies (59), No. two motor brake devices (58), No. two motors
Screw rod (57), No. two motors vertical screw circular shaft section (56), No. six contiguous blocks (48), pressure transducer (47),
No. five contiguous blocks (44), axial compressions load axle composition；Wherein No. two variable speed electric motors, particularly (59) levels are fixed on base
On shelf (62), No. two motor brake devices (58) are arranged on No. two variable speed electric motors, particularlies (59), No. two motors
Vertical screw (57) is connected with the swing pinion of No. two variable speed electric motors, particularlies (59), No. two motor vertical screw circular shafts
Section (56) is by No. three linear bearings (55) through base deck (54), and No. three linear bearings (55) are solid
Due to base deck (54), No. two motor vertical screw circular shaft section (56) tops and No. six contiguous blocks (48)
Lower end is detachably fixed connection；Pressure transducer (47) is embedded in No. six contiguous block (48) upper ends and No. five connections
Block (44) lower end；Axial compression loads axle and is loaded square section of axle (45), axial compression loading axle circular shaft section (33) by axial compression
And axial compression loads the square tenon of axle (32) composition, wherein axial compression loads the square tenon of axle (32) and examination under test specimen
The detachable fixing connection of square groove of mould (22) lower end, axial compression loads square section of axle (45) the most successively
Through pressure chamber base plate (46), pressure chamber base plate piston bush (37), steel plate square washer (39), sill (41),
Sill square opening (43), connection support (49), last axial compression loads the lower end and five of axle square section (45)
The groove of number contiguous block (44) is detachably fixed connection；Wherein, axial compression loads square section of axle (45) and lower horizontal stroke
Beam square opening (43) is that plug-in type connects, and axial compression loads square section of axle (45) can sill square opening (43)
Interior vertically movable, but can not reverse；
Confined pressure loading system is by pressure chamber, confined pressure liquid in-out pipe (77), press-in connection valve (79), a confined pressure
Add unloading controller (68) composition；Wherein pressure chamber by pressure chamber base plate (46), pressure chamber top board (17),
Pressure chamber outer wall (30), pressure chamber upstanding studs (28) form, and pressure chamber base plate (46) is detachably fixed
On steel plate square washer (39), pressure chamber outer wall (30) and pressure chamber base plate (46), pressure chamber top board (17)
On groove and seal washer removably connect, pressure chamber upstanding studs (28) is detachably fixed connection pressure chamber
Base plate (46) and pressure chamber top board (17)；Confined pressure liquid in-out pipe (77) two ends add unloading control respectively with confined pressure
The connection valve of device processed (68), a press-in connection valve (79) removably connect, a press-in connection valve (79)
It is positioned on pressure chamber base plate (46)；
Temperature control system by program control type high-low temperature test chamber (70), thermostatic water bath (71), circulating pump (72),
No. three press-in connection valves (78), outer layer insulation feed tube (74), outer layer insulation drain pipe (73), No. two pressures
Power connect valve (50), internal layer insulation feed tube (81), internal layer insulation drain pipe (80), internal layer couveuse,
Outer layer couveuse, pressure seal valve (46), internal layer temperature sensor (35), exospheric temperature sensor (36)
Composition；No. two press-in connection valves (50), pressure seal valve (46) and lay respectively at pressure chamber base plate (38), pressure
In power ceiling plate (17), internal layer temperature sensor (35) is positioned at internal layer couveuse upper and lower end, outer layer temperature
Degree sensor (36) is positioned at outer layer couveuse upper and lower end；Internal layer couveuse is made up of pressure chamber, and outer layer is protected
Incubator is made up of, wherein pressure chamber outer wall (30), outer layer couveuse outer wall (31), pressure chamber base plate (38)
Outer layer couveuse outer wall (31) is sealingly fastened on pressure chamber base plate (38)；Outer layer insulation feed tube (74),
Outer layer insulation drain pipe (73), internal layer insulation feed tube (81), internal layer insulation drain pipe (80) respectively with follow
Ring pump (72) and No. two press-in connection valves (50), No. three press-in connection valves (78) connect, circulating pump (72)
Being connected with thermostatic water bath (71) by liquid inlet and outlet pipe, thermostatic water bath (71) is installed on the examination of program control type high/low temperature
In tryoff (70)；
Experiment control system is by computer (76), the integrated transducer of USB/RS232/485 (75), a frequency conversion
Device (66), No. two converters (65), No. three converters (69), program control relay (67) compositions；Calculate
Machine (76) is connected, USB/RS232/485 by holding wire transducer integrated with USB/RS232/485 (75)
Integrated transducer (75) by holding wire respectively with a converter (66), No. two converters (65), No. three
Converter (69), program control relay (67), temperature sensor (35), temperature sensor (36) and journey
Control formula high-low temperature test chamber (70) connects；Program control relay (67) passes through holding wire and a motor brake device
(5), No. two motor brake devices (58), No. three motor brake devices (61) connect；A number axial displacement sensing
Device (84), No. two shaft position sensors (85) are the reserved sensor measuring axial displacement, respectively with
The integrated transducer of USB/RS232/485 (75) is connected.
2. the static three axle torsional shear destructive characteristics assay devices of a kind of asphalt as claimed in claim 1, its
It is characterised by, applies, between test specimen die trial end and the entablature of moment of torsion load side, to arrange double layer planar ball
Bearing；Axial compression loads the lower end of axle and arranges square-section section, bears torsion load by the square hole of sill.
3. the static three axle torsional shear destructive characteristics assay devices of a kind of asphalt as claimed in claim 2, its
It is characterised by, between double layer planar ball bearing, spring is set as the buffer unit applying shaft pressuring load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610465083.0A CN105954119B (en) | 2016-06-22 | 2016-06-22 | A kind of static three axis torsional shear destructive characteristics experimental rigs of asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610465083.0A CN105954119B (en) | 2016-06-22 | 2016-06-22 | A kind of static three axis torsional shear destructive characteristics experimental rigs of asphalt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105954119A true CN105954119A (en) | 2016-09-21 |
| CN105954119B CN105954119B (en) | 2018-08-07 |
Family
ID=56903658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610465083.0A Expired - Fee Related CN105954119B (en) | 2016-06-22 | 2016-06-22 | A kind of static three axis torsional shear destructive characteristics experimental rigs of asphalt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105954119B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580479A (en) * | 2018-12-03 | 2019-04-05 | 沈振宗 | A kind of experimental rig measuring asphalt roads inter-layer bonding force |
| CN109580349A (en) * | 2018-12-12 | 2019-04-05 | 中咨公路养护检测技术有限公司 | A kind of pitch cold-patch mixture performance experimental rig and test method |
| CN109870259A (en) * | 2019-02-14 | 2019-06-11 | 五邑大学 | Equivalent shear stress measurement device between shield screw conveyor and modified dregs |
| CN110082087A (en) * | 2019-05-13 | 2019-08-02 | 无锡科力捷新能源科技有限公司 | Motor shaft shearing resistance test fixture |
| CN111006955A (en) * | 2019-12-26 | 2020-04-14 | 江西省宏发路桥建筑工程有限公司 | Asphalt mixture performance testing method and system based on triaxial numerical test |
| CN112179780A (en) * | 2020-09-27 | 2021-01-05 | 江西荧光磁业有限公司 | Blank inspection device suitable for neodymium iron boron magnet and implementation method thereof |
| CN114689297A (en) * | 2022-03-22 | 2022-07-01 | 大连理工大学 | Test bed for detecting torque transmission performance of thin-wall interference connector |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201607374U (en) * | 2010-02-10 | 2010-10-13 | 长沙理工大学 | Asphalt mixture shearing performance testing device |
| CN101949800A (en) * | 2010-08-24 | 2011-01-19 | 清华大学 | Pressing-twisting multi-shaft loading testing machine |
| CN202066761U (en) * | 2011-05-20 | 2011-12-07 | 长安大学 | Torsion shear test device used for bituminous pavement materials and structure |
| CN202453254U (en) * | 2011-12-07 | 2012-09-26 | 长安大学 | Electric large-size stress-control-type ring shear apparatus |
| CN103149098A (en) * | 2013-02-01 | 2013-06-12 | 大连理工大学 | Pitch rotation shear failure experimental device |
| CN103149078A (en) * | 2013-02-28 | 2013-06-12 | 西安理工大学 | Tension-compression-torsion-shearing coupling-based stress path triaxial apparatus |
| CN103149099A (en) * | 2013-02-04 | 2013-06-12 | 大连理工大学 | Pitch rotational shear oscillation fatigue rupture experimental device and method |
| CN103163026A (en) * | 2013-03-08 | 2013-06-19 | 长安大学 | Rock-soil pressure shear rheological testing machine and testing method |
| CN103207120A (en) * | 2013-03-12 | 2013-07-17 | 大连理工大学 | Test device and test method for asphalt rotational shear creep and repeated creep recovery |
| CN103217343A (en) * | 2013-03-07 | 2013-07-24 | 大连理工大学 | Asphalt rotation shear stress relaxation test apparatus |
| CN103245571A (en) * | 2013-05-02 | 2013-08-14 | 大连理工大学 | Rotary shear failure performance determination test device of asphalt mixture |
| CN104655499A (en) * | 2013-11-21 | 2015-05-27 | 交通运输部科学研究院 | Equipment for measuring interlamellar treatment measures torsional shear resistance between pavement structure layers |
-
2016
- 2016-06-22 CN CN201610465083.0A patent/CN105954119B/en not_active Expired - Fee Related
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201607374U (en) * | 2010-02-10 | 2010-10-13 | 长沙理工大学 | Asphalt mixture shearing performance testing device |
| CN101949800A (en) * | 2010-08-24 | 2011-01-19 | 清华大学 | Pressing-twisting multi-shaft loading testing machine |
| CN202066761U (en) * | 2011-05-20 | 2011-12-07 | 长安大学 | Torsion shear test device used for bituminous pavement materials and structure |
| CN202453254U (en) * | 2011-12-07 | 2012-09-26 | 长安大学 | Electric large-size stress-control-type ring shear apparatus |
| CN103149098A (en) * | 2013-02-01 | 2013-06-12 | 大连理工大学 | Pitch rotation shear failure experimental device |
| CN103149099A (en) * | 2013-02-04 | 2013-06-12 | 大连理工大学 | Pitch rotational shear oscillation fatigue rupture experimental device and method |
| CN103149078A (en) * | 2013-02-28 | 2013-06-12 | 西安理工大学 | Tension-compression-torsion-shearing coupling-based stress path triaxial apparatus |
| CN103217343A (en) * | 2013-03-07 | 2013-07-24 | 大连理工大学 | Asphalt rotation shear stress relaxation test apparatus |
| CN103163026A (en) * | 2013-03-08 | 2013-06-19 | 长安大学 | Rock-soil pressure shear rheological testing machine and testing method |
| CN103207120A (en) * | 2013-03-12 | 2013-07-17 | 大连理工大学 | Test device and test method for asphalt rotational shear creep and repeated creep recovery |
| CN103245571A (en) * | 2013-05-02 | 2013-08-14 | 大连理工大学 | Rotary shear failure performance determination test device of asphalt mixture |
| CN104655499A (en) * | 2013-11-21 | 2015-05-27 | 交通运输部科学研究院 | Equipment for measuring interlamellar treatment measures torsional shear resistance between pavement structure layers |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580479A (en) * | 2018-12-03 | 2019-04-05 | 沈振宗 | A kind of experimental rig measuring asphalt roads inter-layer bonding force |
| CN109580479B (en) * | 2018-12-03 | 2021-04-27 | 沈振宗 | Test device for measuring bonding force between asphalt road layers |
| CN109580349A (en) * | 2018-12-12 | 2019-04-05 | 中咨公路养护检测技术有限公司 | A kind of pitch cold-patch mixture performance experimental rig and test method |
| CN109870259A (en) * | 2019-02-14 | 2019-06-11 | 五邑大学 | Equivalent shear stress measurement device between shield screw conveyor and modified dregs |
| CN110082087A (en) * | 2019-05-13 | 2019-08-02 | 无锡科力捷新能源科技有限公司 | Motor shaft shearing resistance test fixture |
| CN110082087B (en) * | 2019-05-13 | 2023-11-14 | 超昇速科技(无锡)有限公司 | Motor rotating shaft shearing force resistance testing tool |
| CN111006955A (en) * | 2019-12-26 | 2020-04-14 | 江西省宏发路桥建筑工程有限公司 | Asphalt mixture performance testing method and system based on triaxial numerical test |
| CN112179780A (en) * | 2020-09-27 | 2021-01-05 | 江西荧光磁业有限公司 | Blank inspection device suitable for neodymium iron boron magnet and implementation method thereof |
| CN112179780B (en) * | 2020-09-27 | 2022-08-16 | 江西荧光磁业有限公司 | Blank inspection device suitable for neodymium iron boron magnet and implementation method thereof |
| CN114689297A (en) * | 2022-03-22 | 2022-07-01 | 大连理工大学 | Test bed for detecting torque transmission performance of thin-wall interference connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105954119B (en) | 2018-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105954119A (en) | Static three-axis torsion shearing destructive property testing device of asphalt mixture | |
| CN106153462A (en) | A kind of asphalt pressure turns round failure by shear performance test apparatus | |
| WO2018006585A1 (en) | Multi-functional true triaxial rock drilling test system and method | |
| CN109374855B (en) | Test device and test method for simulating railway roadbed slurry-rolling mud-pumping disease phenomenon | |
| CN109374454A (en) | Multifunction road pavement material performance testing device and test method | |
| CN110629808B (en) | Test device and test method for interfacial mechanical properties of piles and foundation soil | |
| CN106980014B (en) | Simulate concrete for hydraulic structure corrosion deterioration test device and method under high hydraulic gradient | |
| CN107167378A (en) | Axial tension experimental rig and its test method | |
| CN107219131B (en) | A kind of asphalt horizontal shear performance test apparatus and method considering local axial compressive force | |
| CN110687272A (en) | Rock joint face shear seepage test device and test method based on geothermal exploitation | |
| CN106018100A (en) | Multifunctional true-triaxial rock drilling test system | |
| CN206696093U (en) | Axial tension experimental rig | |
| CN103267682A (en) | Device and method for testing material creep under coupling action of tensile stress and environment | |
| CN103344553B (en) | High-speed rolling contact fatigue testing machine | |
| CN102706734A (en) | Loading test device and method of asymmetric lateral-force-resisting structure | |
| CN103149101A (en) | Multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions | |
| CN106323788A (en) | Device for evaluating drill bit wear and rock abrasiveness of different drilling modes and evaluation method | |
| CN204405424U (en) | A kind of laminar shear model clay case that can load | |
| CN104458428A (en) | Large-sized fluid-solid-heat multi-field coupling test loading system | |
| CN102607958B (en) | Three-direction independent load test method and device for semi-rigid base material of pavement | |
| CN113092256B (en) | Hydraulic concrete fatigue fracture test device | |
| CN102620999B (en) | Simple asphalt mixture true triaxial test equipment | |
| CN103575644A (en) | Test method for matching friction coefficient of contact surface of poured concrete | |
| CN102944483A (en) | Testing device and method for creep performance of material under coupling action of multiple factors | |
| CN105806721A (en) | Large rock-soil mass in-situ direct shear testing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180807 Termination date: 20210622 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |