CN109060560A - A kind of Rock And Soil shear creep test instrument and test method considering Frozen-thawed cycled - Google Patents
A kind of Rock And Soil shear creep test instrument and test method considering Frozen-thawed cycled Download PDFInfo
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- CN109060560A CN109060560A CN201810894239.6A CN201810894239A CN109060560A CN 109060560 A CN109060560 A CN 109060560A CN 201810894239 A CN201810894239 A CN 201810894239A CN 109060560 A CN109060560 A CN 109060560A
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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
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- 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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
Abstract
The present invention relates to a kind of Rock And Soil shear creep test instrument for considering Frozen-thawed cycled, including testing platform system, Frozen-thawed cycled system, four parts of creep test system and monitor control system.Frozen-thawed cycled system, creep test system and monitor control system pass through testing platform system one entirety of composition, Frozen-thawed cycled system provides Frozen-thawed cycled environment by refrigeration cycle and heating circulation for test, creep test system provides normal stress and shear stress by numerical control hydraulic jack for test, and monitor control system is monitored test process by displacement sensor and temperature sensor, controls and data acquisition.The present invention also provides a kind of Rock And Soil shear creep test methods for considering Frozen-thawed cycled.The present invention realizes the shear creep test for carrying out Rock And Soil under Frozen-thawed cycled environment, and effectively increases the efficiency and precision of test.
Description
Technical field
The present invention relates to technique of rock-soil mechanical test field, a kind of cutting for rock-soil material during Frozen-thawed cycled is particularly belonged to
Creep test device and its test method are cut, mechanics parameter of the test in rock-soil material in Frozen-thawed cycled environment is mainly used for.
Background technique
Frozen-thawed cycled is a kind of strong weathering effect, Glacier, alpine region and permafrost region is common in, to ground material
Material has apparent bad effect.Rock-soil material freeze and thawing is a continuous process, Frozen-thawed cycled leads to ground material
Material is repeatedly subjected to freeze and thawing acts on, and accelerates water and complicated physical and chemical reaction occurs for rock-soil material, and finally lead
Cause gradually changing for rock-soil material mechanical characteristic.Under Frozen-thawed cycled effect, mechanical characteristic generation gradually deteriorates rock-soil material,
The intensive parameter and deformation parameter for being mainly shown as Rock And Soil are gradually decreased with the increase of freezing-thawing cycles, and are gradually generated
The deformation of creep.Therefore, Frozen-thawed cycled is to cause one of Glacier, alpine region and principal element of many wprks of permafrost region,
Such as the destruction of slope instability, roadbed and chamber deformation etc..
Have many scholars at present and carried out research for Frozen-thawed cycled, is concentrated mainly on the mould of indoor freezing and thawing circulation environment
Quasi- aspect, discloses the patent of multinomial roadbed freezing and thawing circulating test device successively.But ground can be carried out under Frozen-thawed cycled environment by rarely having
The experimental rig of characteristic of material mechanics test discloses, the creep properties research of rock-soil material, mesh especially under Frozen-thawed cycled environment
It is preceding that there has been no any disclosed instrument and equipments can be used.Existing roadbed freezing and thawing circulating test device is primarily present two problems: 1. ground
Material is detached from original ambient stress during Frozen-thawed cycled, lead to that rock-soil material is subject to freeze and thawing effect with it is practical
Situation is not inconsistent, and influences the changing rule of its mechanics parameter；2. cannot directly carry out the compacted of rock-soil material under Frozen-thawed cycled environment
Become test, and the creep process of rock-soil material is directly related with Frozen-thawed cycled.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Rock And Soil cutting creep instruments for considering Frozen-thawed cycled, for opening
The shear creep test of rock-soil material during exhibition Frozen-thawed cycled.The present invention solves technical solution used by above-mentioned technical problem
It is:
A kind of Rock And Soil cutting creep instrument considering Frozen-thawed cycled, including testing platform system, Frozen-thawed cycled system, creep
Pilot system and monitor control system, the Frozen-thawed cycled system, the creep test system and the monitor control system are logical
It crosses the testing platform system and constitutes an entirety, the Frozen-thawed cycled system is mentioned by refrigeration cycle and heating circulation for test
For Frozen-thawed cycled environment, the creep test system provides normal stress by numerical control hydraulic jack for test and shearing is answered
Power, the monitor control system are monitored test process by displacement sensor and temperature sensor, control and adopt with data
Collection.
While by adopting the above technical scheme, the present invention can also be used or be combined using technology further below
Scheme:
The testing platform system includes test platform and suspension, and the test platform is four leg table type platforms, as whole
The support construction and operating platform of a tester, upper part space is for installing the creep test system, monitoring control
The equipment of system and part the Frozen-thawed cycled system；The suspension is fixed below test platform table top using 4 hanging pillars,
Equipment of the inner space for Frozen-thawed cycled system described in installation section.
The Frozen-thawed cycled system includes refrigeration machine, heating machine, connection hose, cold heat circulation pipe, experiment casing, heat preservation
Shell, hinge, test chamber door and double layer glass observation window, the refrigeration machine and the heating machine are mounted on the test
On the suspension of plateform system, refrigeration can be constituted by the connection hose and the cold heat circulation pipe or heating is recycled back to
Road provides stably and controllable refrigeration or heating effect for test；The experiment casing is cuboid hollow member open at one end,
It is fixed on above the test platform；The test chamber door constitutes closed hollow cavity by the hinge and the experiment casing
Body can carry out switching action along the hinge, can provide relatively closed experimental enviroment to test when closure；The test chamber door
Middle part offers the double layer glass observation window, for observing each component of tester and ground sample during the test
State；The insulation shell is wrapped on the outside of the experiment casing, for completely cutting off inside the experiment casing between outside
Cold and hot exchange provides metastable temperature environment for the Frozen-thawed cycled of test.
The creep test system includes normal direction jack anchor bolt, normal direction numerical control hydraulic jack, normal direction jack
It is inlet nozzle, level jack anchor bolt, horizontal numerical control hydraulic jack, level jack inlet nozzle, active shear box, passive
Shear box, rolling steel ball and postive stop baffle, the normal direction numerical control hydraulic jack are solid by the normal direction jack anchor bolt
It is connected in the experiment casing inner top, provides stably and controllable normal stress for test；The normal direction jack inlet nozzle passes through
It wears the experiment casing and the insulation shell extends to outside；The horizontal numerical control hydraulic jack is very heavy by the level
Top anchor bolt is fixed on the experiment casing inside right side wall, provides stably and controllable shear stress for test；The active
Shear box is cuboid hollow member open at one end, and right side position has and the matching used auricula of the level jack
Out, Open Side Down when use；The passive shear box is cuboid hollow member open at one end, opening upwards when use, with
The internal cavities that the active shear box cooperatively forms are for loading Rock And Soil sample to be tested；The rolling steel ball is opened in column
The active shear box is being cut as the drag reduction component of the active shear box set on the top of the active shear box
Shear displacemant can occur under shearing stress effect；The postive stop baffle is fixed on the top of the experiment casing, passively cuts with described
It cuts box to match, prevents the passive shear box from shear displacemant occurs under shear stress.
The monitor control system includes temperature sensor and horizontal displacement sensors, and the temperature sensor is installed on institute
Experiment casing internal side wall is stated, for the temperature inside experiment casing described in real-time monitoring, when temperature reaches setting value, is stopped
The work of the refrigeration machine or the heating machine, when temperature departure setting value a certain range, be again started up the refrigeration machine or
The work of the heating machine guarantees that the temperature inside the experiment casing maintains near setting value；The horizontal displacement sensing
Device is installed on the experiment casing internal side wall, the horizontal direction position for the active shear box during real-time monitoring test
It moves.
On the basis of the Rock And Soil cutting creep instrument of above-mentioned consideration Frozen-thawed cycled, the present invention also provides a kind of consideration jellies
Melt the Rock And Soil shear creep test method of circulation.For this purpose, the invention adopts the following technical scheme:
The test method the following steps are included:
(1) test prepares:
Test chamber door is opened, active shear box and passive shear box are taken out, the ground sample that preparation is completed is packed into actively
Between shear box and passive shear box, then together with Rock And Soil sample, edge is limited as a whole by active shear box and passive shear box
Baffle is pushed into inside experiment casing, closes test chamber door；
Normal direction jack inlet nozzle and level jack inlet nozzle are connect with oil pump respectively；Normal direction numerical control hydraulic is very heavy
Top, horizontal numerical control hydraulic jack, temperature sensor and horizontal displacement sensors are connect with microcomputer, and by data initialization；
(2) primary stress: the practically stress condition according to locating for ground sample determines the normal stress of ground sample
Value applies normal stress using normal direction numerical control hydraulic jack；
(3) consider the shear creep of Frozen-thawed cycled: setting solidification point, melt temperature and circulation time, applying the first order
Frozen-thawed cycled is opened when shear stress, the temperature inside experiment casing is reduced by refrigeration machine, is tieed up after reaching setting solidification point
Hold certain time；Increase the temperature inside experiment casing by heating machine, maintains certain time after reaching setting melt temperature, from
And realize Frozen-thawed cycled, and record shear creep deformation under this condition；
Shear stress is applied using numerical control shearing jack step by step, under Frozen-thawed cycled environment, every level-one shearing is loaded and answers
After power, maintain shear stress constant and continuous observation record shear creep deformation, under applying again after shear creep stabilization
Level-one shear stress, until sample shears creep rupture；
(4) it repeats to test after the sample more renewed: adjusting different solidification points, repeat step (2)~(3)；
(5) shearing strain is calculated by formula 1:
Wherein, ε is shearing strain；κ is shear creep deformation；L is length of the ground sample along shear direction；
(6) result treatment: draw Rock And Soil in the corresponding Frozen-thawed cycled environment of different solidification points shear strain and when
Between relation curve.
The beneficial effects of the present invention are:
1, the synchronous Frozen-thawed cycled process and creep testing process for carrying out ground sample in an instrument, to realize
The creep test research of Rock And Soil under Frozen-thawed cycled environment；
2, the primitive stress of ground sample can be restored during Frozen-thawed cycled, it is ensured that ground sample is in practical geology item
Frozen-thawed cycled is carried out in ambient stress similar in part, and the accuracy of test result greatly improved；
3, rectangular large-sized ground sample can be used and carry out test, due to the optimization of rectangular ground sample force way and
Succinct geometry, is effectively simplified the calculation method of ground sample mechanics parameter, and significantly reduces test dimensional effect
Influence.
Detailed description of the invention
Fig. 1 is a kind of front view of Rock And Soil shear creep test instrument for considering Frozen-thawed cycled.
Fig. 2 is a kind of side view of Rock And Soil shear creep test instrument for considering Frozen-thawed cycled.
Fig. 3 is the A-A ' sectional view of Fig. 2.
Fig. 4 is a kind of perspective view of Rock And Soil shear creep test instrument for considering Frozen-thawed cycled.
Figure label: 1: test platform；2: suspension；3: refrigeration machine；4: heating machine；5: connection hose；6: cold cycling pipe；
7: experiment casing；8: insulation shell；9: hinge；10: test chamber door；11: double layer glass observation window；12: normal direction jack
Anchor bolt；13: normal direction numerical control hydraulic jack；14: normal direction jack inlet nozzle；15: level jack anchor bolt；16:
Horizontal numerical control hydraulic jack；17: level jack inlet nozzle；18: active shear box；19: passive shear box；20: limiting block
Plate；21: rolling steel ball；22: temperature sensor；23: horizontal displacement sensors.
Specific embodiment
Referring to attached drawing.The Rock And Soil shear creep test instrument provided by the invention for considering Frozen-thawed cycled, including test platform
System, Frozen-thawed cycled system, creep test system and monitor control system, the Frozen-thawed cycled system, the creep test system
By the testing platform system one entirety of composition, the Frozen-thawed cycled system passes through refrigeration for system and the monitor control system
Circulation and heating, which recycle, provides Frozen-thawed cycled environment for test, and the creep test system is test by numerical control hydraulic jack
Normal stress and shear stress be provided, the monitor control system by displacement sensor and temperature sensor to test process into
Row monitoring, control and data acquire.
The testing platform system includes test platform 1 and suspension 2, and the test platform 1 is four leg table type platforms, as
The support construction and operating platform of entire tester, upper part space is for installing the creep test system, monitoring control
The equipment of system processed and part the Frozen-thawed cycled system；The suspension 2 is fixed below test platform using 4 hanging pillars,
Equipment of the inner space for Frozen-thawed cycled system described in installation section.
The Frozen-thawed cycled system include refrigeration machine 3, heating machine 4, connection hose 5, cold cycling pipe 6, experiment casing 7,
Insulation shell 8, hinge 9, test chamber door 10 and double layer glass observation window 11, the refrigeration machine 3 and the heating machine 4 are pacified
On the suspension 2 loaded on the testing platform system, system can be constituted by the connection hose 5 and the cold cycling pipe 6
Cold or heating circulation loop provides stably and controllable refrigeration or heating effect for test, and the setting of cold cycling pipe 6 is being tested
In cabinet 7；The experiment casing 7 is cuboid hollow member open at one end, is fixed on 1 top of test platform；It is described
Test chamber door 10 constitutes closed hollow cavity with the experiment casing 7 by the hinge 9, and the test chamber door 10 can be along described
Hinge 9 carries out switching action, can provide relatively closed experimental enviroment to test when closure；It is opened up in the middle part of the test chamber door 10
There is the double layer glass observation window 11, for observing the state of each component of tester and ground sample during the test；
The insulation shell 8 is wrapped in 7 outside of experiment casing, cold between 7 inside of experiment casing and outside for completely cutting off
Heat exchange provides metastable temperature environment for the Frozen-thawed cycled of test.
The creep test system includes normal direction jack anchor bolt 12, normal direction numerical control hydraulic jack 13, normal direction thousand
Jin jacking oil nozzle 14, level jack anchor bolt 15, horizontal numerical control hydraulic jack 16, level jack inlet nozzle 17, master
Dynamic shear box 18, passive shear box 19, rolling steel ball 21 and postive stop baffle 20, the normal direction numerical control hydraulic jack 13 pass through institute
It states normal direction jack anchor bolt 12 and is fixed on 7 inner top of experiment casing, provide stably and controllable normal direction for test and answer
Power；The normal direction jack inlet nozzle 14 extends to outside through the experiment casing 7 and the insulation shell 8；The level
Numerical control hydraulic jack 16 is fixed on the experiment casing inside right side wall by the level jack anchor bolt 15, for examination
It tests and stably and controllable shear stress is provided；The active shear box 18 is cuboid hollow member open at one end, right side position
Equipped with prominent with the matching used ear of the level jack, when use, Open Side Down；The passive shear box 19 is one end
The cuboid hollow member of opening, opening upwards when use, the internal cavities cooperatively formed with the active shear box 18 are used for
Load Rock And Soil sample to be tested；The rolling steel ball 21 is opened in the top of the active shear box 18 in column, as institute
The drag reduction component for stating active shear box 18 makes the active shear box 18 that shear displacemant can occur under the action of shear stress；
The postive stop baffle 20 is a pair of of strip component, is fixed on the top of the experiment casing 7, mating with the passive shear box 19
It uses, prevents the passive shear box 19 from shear displacemant occurs under the action of shear stress.
The monitor control system includes temperature sensor 22 and horizontal displacement sensors 23, and the temperature sensor 22 is pacified
Loaded on 7 internal side wall of experiment casing, for the temperature inside experiment casing 7 described in real-time monitoring, when temperature reaches setting
When value, stop the work of the refrigeration machine 3 or the heating machine 4, when temperature departure setting value a certain range, is again started up institute
The work for stating refrigeration machine 3 or the heating machine 4 guarantees that the temperature inside the experiment casing 7 maintains near setting value；It is described
Horizontal displacement sensors 23 are installed on 7 inside left side wall of experiment casing, for the active during real-time monitoring test
The horizontal direction of shear box 18 is displaced.
Using the Rock And Soil shear creep test of the invention for carrying out consideration Frozen-thawed cycled, specific step is as follows:
(1) sample is installed: test chamber door is opened, active shear box and passive shear box are taken out, the ground that preparation is completed
Sample is packed between active shear box and passive shear box, then active shear box and passive shear box are made together with Rock And Soil sample
It is pushed into inside experiment casing for entirety along postive stop baffle, closes test chamber door；
(2) instrument connects: normal direction jack inlet nozzle and level jack inlet nozzle are connect with oil pump respectively；By normal direction
Numerical control hydraulic jack, horizontal numerical control hydraulic jack, temperature sensor and horizontal displacement sensors are connect with microcomputer, and will be counted
According to initialization；
(3) primary stress: the practically stress condition according to locating for ground sample determines the normal stress of ground sample
Value applies normal stress using normal direction numerical control hydraulic jack；
(4) it Frozen-thawed cycled: setting solidification point, melt temperature and circulation time, is opened when applying first order shear stress
Frozen-thawed cycled reduces the temperature inside experiment casing by refrigeration machine, maintains certain time after reaching setting solidification point；Pass through
Heating machine increases the temperature inside experiment casing, certain time is maintained after reaching setting melt temperature, to realize Frozen-thawed cycled.
(5) shear creep: applying shear stress using numerical control shearing jack step by step, under Frozen-thawed cycled environment, load
After every level-one shear stress, maintain shear stress constant and continuous observation record shear creep deformation, it is steady to shear creep deformation
(deflection is considered as stabilization less than 0.01mm in 24 hours) applies next stage shear stress again after fixed, until sample shear creep
It destroys.
(6) it repeats to test: adjusting different solidification points, repeat step (1)~(5)；
(7) shearing strain is calculated by formula 1:
Wherein, ε is shearing strain；κ is shear creep deformation；L is length of the ground sample along shear direction.
(8) result treatment: draw Rock And Soil in the corresponding Frozen-thawed cycled environment of different solidification points shear strain and when
Between relation curve.
The foregoing is merely the specific implementation case of invention, technical characteristic of the invention is not limited thereto, any correlation
Within the field of the present invention, made changes or modifications all cover within the protection scope of the present invention the technical staff in field.
Claims (6)
1. a kind of Rock And Soil cutting creep instrument for considering Frozen-thawed cycled, it is characterised in that: including testing platform system, Frozen-thawed cycled
System, creep test system and monitor control system；The Frozen-thawed cycled system, the creep test system and monitoring control
System processed constitutes an entirety by the testing platform system, and the Frozen-thawed cycled system passes through refrigeration cycle and heating circulation
There is provided Frozen-thawed cycled environment for test, the creep test system by numerical control hydraulic jack be test provide normal stress with
Shear stress, the monitor control system is monitored test process by displacement sensor and temperature sensor, control with
Data acquisition.
2. a kind of Rock And Soil cutting creep instrument for considering Frozen-thawed cycled as described in claim 1, it is characterised in that: the test
Plateform system includes test platform and suspension, and the test platform is four leg table type platforms, the support knot as entire tester
Structure and operating platform, upper part space is for installing the creep test system, the monitor control system and the part jelly
Melt the equipment of the circulatory system；The suspension is fixed below test platform table top using 4 hanging pillars, and inner space is for installing
The equipment of the part Frozen-thawed cycled system.
3. a kind of Rock And Soil cutting creep instrument for considering Frozen-thawed cycled as described in claim 1, it is characterised in that: the freeze thawing
The circulatory system includes refrigeration machine, heating machine, connection hose, cold heat circulation pipe, experiment casing, insulation shell, hinge, chamber
Door and double layer glass observation window, the refrigeration machine and the heating machine are mounted on the described outstanding of the testing platform system
On frame, refrigeration or heating circulation loop are constituted by the connection hose and the cold heat circulation pipe, providing stabilization for test can
The refrigeration or heating effect of control；The experiment casing is cuboid hollow member open at one end, is fixed on the test platform
Top；The test chamber door constitutes closed hollow cavity by the hinge and the experiment casing, can carry out along the hinge
Switching action can provide relatively closed experimental enviroment for test when closure；The bilayer is offered in the middle part of the test chamber door
Hollow glass observation window, for observing the state of each component of tester and ground sample during the test；The insulation shell
It is wrapped on the outside of the experiment casing, is exchanged inside the experiment casing with cold and hot between outside for completely cutting off, for test
Frozen-thawed cycled provides metastable temperature environment.
4. a kind of Rock And Soil cutting creep instrument for considering Frozen-thawed cycled as described in claim 1, it is characterised in that: the creep
Pilot system includes normal direction jack anchor bolt, normal direction numerical control hydraulic jack, normal direction jack inlet nozzle, level jack
Anchor bolt, horizontal numerical control hydraulic jack, level jack inlet nozzle, active shear box, passive shear box, rolling steel ball and
Postive stop baffle, the normal direction numerical control hydraulic jack are fixed in the experiment casing by the normal direction jack anchor bolt
Portion's top plate provides stably and controllable normal stress for test；The normal direction jack inlet nozzle runs through the experiment casing and institute
It states insulation shell and extends to outside；The horizontal numerical control hydraulic jack is fixed on institute by the level jack anchor bolt
Experiment casing inside right side wall is stated, provides stably and controllable shear stress for test；The active shear box is open at one end
Cuboid hollow member, right side position have with the matching used connecting portion of the level jack, Open Side Down when use；Institute
Stating passive shear box is cuboid hollow member open at one end, and opening upwards when use cooperate shape with the active shear box
At internal cavities for loading Rock And Soil sample to be tested；The rolling steel ball is opened in the active shear box in column
Top cut the active shear box can under shear stress as the drag reduction component of the active shear box
Cut displacement；The postive stop baffle is fixed on the top of the experiment casing, matches with the passive shear box, prevents described
Under shear stress shear displacemant occurs for passive shear box.
5. a kind of Rock And Soil cutting creep instrument for considering Frozen-thawed cycled as described in claim 1, it is characterised in that: the monitoring
Control system includes temperature sensor and horizontal displacement sensors, and the temperature sensor is installed on the experiment casing private side
Wall, when temperature reaches setting value, stops the refrigeration machine or described for the temperature inside experiment casing described in real-time monitoring
The work of heating machine is again started up the work of the refrigeration machine or the heating machine when temperature departure setting value a certain range,
Guarantee that the temperature inside the experiment casing maintains near setting value；The horizontal displacement sensors are installed on the chamber
Body internal side wall, the horizontal direction displacement for the active shear box during real-time monitoring test.
6. a kind of Rock And Soil shear creep test method for considering Frozen-thawed cycled, it is characterised in that: the test method application power
Benefit require 1 described in a kind of Rock And Soil cutting creep instrument of consideration Frozen-thawed cycled；
The testing platform system includes test platform and suspension, and the test platform is four leg table type platforms, as entire examination
The support construction and operating platform of instrument are tested, upper part space is for installing the creep test system, the monitor control system
With the equipment of the part Frozen-thawed cycled system；The suspension is fixed below test platform table top using 4 hanging pillars, inside
Equipment of the space for Frozen-thawed cycled system described in installation section；
The Frozen-thawed cycled system include refrigeration machine, heating machine, connection hose, cold heat circulation pipe, experiment casing, insulation shell,
Hinge, test chamber door and double layer glass observation window, the refrigeration machine and the heating machine are mounted on the test platform
On the suspension of system, refrigeration or heating circulation loop are constituted by the connection hose and the cold heat circulation pipe, for examination
It tests and stably and controllable refrigeration or heating effect is provided；The experiment casing is cuboid hollow member open at one end, is fixed on
Above the test platform；The test chamber door constitutes closed hollow cavity by the hinge and the experiment casing, can edge
The hinge carries out switching action, and when closure can provide relatively closed experimental enviroment to test；It is opened in the middle part of the test chamber door
Equipped with the double layer glass observation window, for observing the state of each component of tester and ground sample during the test；
The insulation shell is wrapped on the outside of the experiment casing, for completely cutting off the cold and hot friendship inside the experiment casing between outside
It changes, provides metastable temperature environment for the Frozen-thawed cycled of test；
The creep test system includes normal direction jack anchor bolt, normal direction numerical control hydraulic jack, normal direction jack oil inlet
Mouth, level jack anchor bolt, horizontal numerical control hydraulic jack, level jack inlet nozzle, active shear box, passive shearing
Box, rolling steel ball and postive stop baffle, the normal direction numerical control hydraulic jack are fixed on by the normal direction jack anchor bolt
The experiment casing inner top provides stably and controllable normal stress for test；The normal direction jack inlet nozzle runs through institute
It states experiment casing and the insulation shell extends to outside；The horizontal numerical control hydraulic jack passes through the level jack anchor
Fixing bolt is fixed on the experiment casing inside right side wall, provides stably and controllable shear stress for test；The active shearing
Box be cuboid hollow member open at one end, right side position have with the matching used connecting portion of the level jack, make
Used time, Open Side Down；The passive shear box is cuboid hollow member open at one end, opening upwards when use, with the master
The internal cavities that dynamic shear box cooperatively forms are for loading Rock And Soil sample to be tested；The rolling steel ball is opened in institute in column
The top for stating active shear box makes the active shear box in shear stress as the drag reduction component of the active shear box
Shear displacemant can occur under effect；The postive stop baffle is fixed on the top of the experiment casing, matches with the passive shear box
Set uses, and prevents the passive shear box from shear displacemant occurs under shear stress；
The monitor control system includes temperature sensor and horizontal displacement sensors, and the temperature sensor is installed on the examination
Box house side wall is tested, for the temperature inside experiment casing described in real-time monitoring, when temperature reaches setting value, described in stopping
The work of refrigeration machine or the heating machine is again started up the refrigeration machine or described when temperature departure setting value a certain range
The work of heating machine guarantees that the temperature inside the experiment casing maintains near setting value；The horizontal displacement sensors peace
Horizontal direction displacement loaded on the experiment casing internal side wall, for the active shear box during real-time monitoring test；
The test method the following steps are included:
(1) test prepares:
Test chamber door is opened, active shear box and passive shear box are taken out, the ground sample that preparation is completed, which is packed into, actively to be sheared
Between box and passive shear box, then by active shear box and passive shear box together with Rock And Soil sample as a whole along postive stop baffle
It is pushed into inside experiment casing, closes test chamber door；
Normal direction jack inlet nozzle and level jack inlet nozzle are connect with oil pump respectively；By normal direction numerical control hydraulic jack,
Horizontal numerical control hydraulic jack, temperature sensor and horizontal displacement sensors are connect with microcomputer, and by data initialization；
(2) primary stress: the practically stress condition according to locating for ground sample determines the normal stress value of ground sample, adopts
Apply normal stress with normal direction numerical control hydraulic jack；
(3) consider the shear creep of Frozen-thawed cycled: setting solidification point, melt temperature and circulation time apply first order shearing
Frozen-thawed cycled is opened when stress, the temperature inside experiment casing is reduced by refrigeration machine, maintains one after reaching setting solidification point
It fixes time；Increase the temperature inside experiment casing by heating machine, maintain certain time after reaching setting melt temperature, thus real
Existing Frozen-thawed cycled, and record shear creep deformation under this condition；
Shear stress is applied using numerical control shearing jack step by step, under Frozen-thawed cycled environment, after loading every level-one shear stress,
It maintains shear stress constant and continuous observation record shear creep deformation, applies next stage again after shear creep stabilization and cut
Shearing stress, until sample shears creep rupture；
(4) it repeats to test after the sample more renewed: adjusting different solidification points, repeat step (2)~(3)；
(5) shearing strain is calculated by formula 1:
Wherein, ε is shearing strain；κ is shear creep deformation；L is length of the ground sample along shear direction；
(6) shear strain of Rock And Soil and time in the corresponding Frozen-thawed cycled environment of different solidification points result treatment: are drawn
Relation curve.
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