CN108020473A - Consider the Rock And Soil cutting creep instrument and its test method of drying and watering cycle - Google Patents
Consider the Rock And Soil cutting creep instrument and its test method of drying and watering cycle Download PDFInfo
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- CN108020473A CN108020473A CN201810004350.3A CN201810004350A CN108020473A CN 108020473 A CN108020473 A CN 108020473A CN 201810004350 A CN201810004350 A CN 201810004350A CN 108020473 A CN108020473 A CN 108020473A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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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
- G01N2203/0058—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
- G01N2203/0236—Other environments
-
- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The present invention relates to a kind of Rock And Soil cutting creep instrument and its test method for considering drying and watering cycle.The object of the present invention is to provide a kind of the Rock And Soil cutting creep instrument and its test method of consideration drying and watering cycle simple in structure, easy to operate, both the shear creep test of soft rock or pan soil during drying and watering cycle can have been carried out, can also carry out the direct shear test of the lower soft rock of drying and watering cycle effect or pan soil.The technical scheme is that：A kind of Rock And Soil cutting creep instrument for considering drying and watering cycle, it is characterised in that：With bottom plate, bottom plate is equipped with opening up passive shear box, and ground sample is placed in passive shear box, sets the active shear box that Open Side Down above passive shear box, active shear box is covered on ground sample.The present invention is in the mechanics parameter of soft rock or pan soil drying and watering cycle environment suitable for test.
Description
Technical field
The present invention relates to a kind of Rock And Soil cutting creep instrument and its test method for considering drying and watering cycle.At test
The mechanics parameter of soft rock or pan soil in drying and watering cycle environment.
Background technology
Drying and watering cycle is a kind of common natural operating mode, such as：Natural slope Rock And Soil is subjected to periodic rainfall and wind
Dry effect, reservoir stability Rock And Soil is subjected to periodic Reservoir Operation effect, so as to cause Rock And Soil inside side slope to be subject to the cycle
Property drying and watering cycle effect, drying and watering cycle effect promotes water and Rock And Soil and complicated physical-chemical reaction occurs, and finally leads
Cause gradually changing for rock mechanical characteristic.
The change of the lower rock mechanical characteristic of drying and watering cycle effect is mainly shown as two aspects：1st, Rock And Soil intensive parameter
(especially shear strength parameter) is gradually reduced with the increase of drying moistening cycle；2nd, Rock And Soil under stress conditions, with dry
Wet cyclic process gradually produces the deformation of creep.Under above-mentioned both sides collective effect, the stability of side slope can pushing away with the time
Move and gradually reduce, therefore drying and watering cycle is a key factor for causing slope instability to destroy.
The mechanical characteristic for having scholar at present for the lower Rock And Soil of drying and watering cycle effect has carried out research, is concentrated mainly on room
Interior drying and watering cycle process simulation experiment and mechanics parameter measuring technology etc., deformation failure of these researchs for announcement side slope
Mechanism has important theoretical and practical significance.But current research still remains following deficiency：1st, indoor dry and wet is circulated throughout
Journey simulates the ambient stress departing from Rock And Soil.Current experiment is more to be divided into two single mistakes by drying and watering cycle and mechanical test
Journey, the true stress occurrence condition of Rock And Soil can not be simulated during drying and watering cycle, causes the change of rock mechanical parameter
Rule deviates actual；2nd, heating dehumidification method has certain damage to the internal structure of ground sample.Interior dry and wet is followed at present
The drying of ring process simulation is more especially native to Rock And Soil using oven for drying or the method for hot blast drying, such method
The structure in internal portion has certain damaging action, so as to cause the test result of mechanics parameter not conform to the actual conditions；3rd, Indoor Dry
Wet cyclic process is simulated less efficient.Since Rock And Soil is the non-conductor of heat, and ground sample, especially sticky great soil group are tried
The infiltration coefficient of sample is relatively low, therefore the moisture inside ground sample is difficult to be discharged by way of heating dehumidification so that dry and wet is followed
Ring process simulation it is less efficient, and the size for limiting ground sample cannot be excessive, thus cause Mechanical test results by
To the influence of certain size effect.
The content of the invention
The technical problem to be solved in the present invention is：For above-mentioned problem, there is provided a kind of simple in structure, easy to operate
Consideration drying and watering cycle Rock And Soil cutting creep instrument and its test method, can both carry out soft rock or pan soil during drying and watering cycle
Shear creep test, can also carry out the direct shear test of the lower soft rock of drying and watering cycle effect or pan soil.
The technical solution adopted in the present invention is：A kind of Rock And Soil cutting creep instrument for considering drying and watering cycle, its feature exist
In：With bottom plate, bottom plate is equipped with opening up passive shear box, and ground sample, passive shearing are placed in passive shear box
The active shear box that Open Side Down is set above box, and active shear box is covered on ground sample；
The normal direction load maintainer for applying normal stress to it is equipped with the top of active shear box, normal direction load maintainer is cut with active
Cut and rigid backing plate is equipped between box, rigid backing plate end face is uniformly provided with some rolling steel balls；Active shear box side is equipped with to it
Apply the shearing load maintainer of shear stress；
Corresponding active shear box, which is equipped with, to be used to measure active shear box Normal Displacement and the Normal Displacement of clipped position respectively
Sensor and shear displacemant sensor；
It is equipped with passive shear box and active shear box and realizes that ground sample dry and wet is followed by immersion moistening and microwave dehumidification
The drying and watering cycle system of ring.
Drying and watering cycle system includes infiltration mechanism and dehumidification mechanism；
Wherein infiltrating mechanism includes being respectively arranged in the upper permeable of bottom in active shear box inner top and passive shear box
Plate and lower porous disc, wherein offering connection active shear box in upper porous disc and extending to the upper steam outside active shear box
Hole, the passive shear box of connection is offered in lower porous disc and extends to the lower water vapor hole outside passive shear box；
Dehumidification mechanism includes the microwave generator being installed in active shear box and passive shear box；
When drying and watering cycle mechanism carries out ground sample immersion moistening, the distilled water of upper water vapor hole connection constant pressure,
Lower water vapor hole communicated drainage sink；
When drying and watering cycle mechanism carries out microwave dehumidification to ground sample, upper and lower water vapor hole connects negative pressure sucking pump.
The temperature sensor for being used for measuring ground specimen temperature is equipped with passive shear box and active shear box, microwave occurs
The ground specimen temperature that device is measured according to temperature sensor works.
Upper and lower porous disc uses the permeable slabstone of clay.
Normal direction load maintainer has numerical control normal direction jack, and shearing load maintainer has numerical control shearing jack.
Normal direction load maintainer and shearing load maintainer are fixed on bottom plate through stent.
Ground sample uses square large dimension specimen, the cavity shape that the passive shear box is cooperatively formed with active shear box
Shape is adapted with the ground sample.
The method tested using the Rock And Soil cutting creep instrument of drying and watering cycle is considered, it is characterised in that：
1st, sample is installed：Ground sample is positioned between active shear box and passive shear box, ground sample bottom is put
In on lower porous disc, porous disc on apical grafting at the top of ground sample；
2nd, primary stress is applied：According to the practically stress condition residing for ground sample sampling point, ground sample is determined
Initial stress values, apply primary stress using normal direction load maintainer；
3rd, drying and watering cycle：
The access of upper water vapor hole is had to the distilled water of constant pressure, lower water vapor hole is connected to draining sink, waits distillation water infiltration
Whole ground sample, and discharged from lower water vapor hole, maintain state certain time to realize the full water process of ground sample；
Upper and lower water vapor hole is respectively connected to negative pressure sucking pump, opens the microwave hair in active shear box and passive shear box
Raw device, maintains state certain time to realize the drying of ground sample；
Repeat the drying and watering cycle process that full water and dehumidification realize the certain number of ground sample；
4th, normal stress is applied：Normal stress is applied using normal direction load maintainer, keeps normal direction should after reaching specified value
Power is constant；
5th, shear stress is applied：Shear stress is applied using shearing load maintainer, loads per after level-one shear stress, maintains
Shear stress is constant and continuous observation record shear creep deforms, and after shear creep stabilization, deflection is small in one day
It is considered as stabilization in 0.01mm, then applies next stage shear stress, while record the action time of upper level shear stress, until examination
Sample shear creep destroys；
6th, repeat to test：Adjust different brackets normal stress, repeat step 1~5；
7th, shearing strain is calculated：
Wherein, ε is shearing strain；κ deforms for shear creep；L is length of the ground sample along shear direction.
8th, result treatment：Draw under the effect of different brackets normal stress, undergo Rock And Soil after certain number drying and watering cycle
Shearing strain and the relation curve of time.
The method tested using the Rock And Soil cutting creep instrument of drying and watering cycle is considered, it is characterised in that：
1st, sample is installed：Ground sample is positioned between active shear box and passive shear box, ground sample bottom is put
In on lower porous disc, porous disc on apical grafting at the top of ground sample；
2nd, primary stress is applied：According to the practically stress condition residing for ground sample sampling point, ground sample is determined
Initial stress values, apply primary stress using normal direction load maintainer；
3rd, drying and watering cycle：
The access of upper water vapor hole is had to the distilled water of constant pressure, lower water vapor hole is connected to draining sink, waits distillation water infiltration
Whole ground sample, and discharged from lower water vapor hole, maintain state certain time to realize the full water process of ground sample；
Upper and lower water vapor hole is respectively connected to negative pressure sucking pump, opens the microwave hair in active shear box and passive shear box
Raw device, maintains state certain time to realize the drying of ground sample；
Repeat the drying and watering cycle process that full water and dehumidification realize the certain number of ground sample；
4th, normal stress is applied：Normal stress is applied using normal direction load maintainer, keeps normal direction should after reaching specified value
Power is constant；
5th, shear stress is applied：Shear stress is applied using shearing load maintainer step by step, adds level-one at regular intervals, directly
To ground sample failure by shear；
6th, repeat to test：Adjust different brackets normal stress, repeat step 1~5；
7th, normal stress σ and shear stress τ is calculated：
Wherein, σ is normal stress；τ is shear stress；G is the gross weight of active shear box and rigid backing plate；PvFor normal direction
The output of load maintainer；PhTo shear the output of load maintainer；A is the section of shear of ground sample.
8th, result treatment：The normal stress of each sample and shear stress point are painted in coordinate diagram, fitting normal stress and
Shear stress relation curve, determines the shear strength parameter of Rock And Soil after the certain number drying and watering cycle of experience.
In drying, after the ground specimen temperature that temperature sensor measures exceedes setting high level, stop microwave hair
Raw device work, when temperature falls back to setting low value, starts microwave generator work.
The beneficial effects of the invention are as follows：
1st, the drying and watering cycle process and mechanical test process of ground sample are concentrated on Rock And Soil cutting creep instrument by the present invention
It is interior, drying and watering cycle and mechanical test are carried out without shifting ground sample repeatedly, largely reduces ground sample and repeatedly turns
Disturbance during shifting；
2nd, the present invention can recover the primitive stress of ground sample during drying and watering cycle, it is ensured that ground sample is in actual
Drying and watering cycle is carried out in ambient stress similar in geological conditions, the accuracy of result of the test is greatly improved；
3rd, the present invention realizes the drying of ground sample using microwave generator, due to metal material to microwave with good
Good reflex, rock-soil material have microwave fabulous penetration, and water has microwave good absorption, therefore
Microwave can penetrate rock-soil material, and vibration heating is carried out to the moisture of its inside, not only improve the dehumidification efficiency of ground sample, but also drop
Damage in low ground sample drying, and the shear box of metal material can effectively prevent microwave from leakage；
4th, the present invention carries out experiment using square large-sized ground sample, due to the stress side of square ground sample optimization
Formula and succinct geometry, are effectively simplified the computational methods of ground sample mechanics parameter；Simultaneously as square large scale rock
Soil sample than cutting ring direct shear test and the section of shear of the specific bigger of triaxial compression test, imitate by the size for effectively reducing experiment
Should.
Brief description of the drawings
Fig. 1 is the front view of embodiment.
Fig. 2 is the side view of embodiment.
Fig. 3 is the top view of embodiment.
Fig. 4 is the A-A sectional views of Fig. 3.
Fig. 5 is the B-B sectional views of Fig. 3.
Fig. 6 is the stereogram of embodiment.
Embodiment
As shown in Fig. 1~Fig. 6, the present embodiment is a kind of Rock And Soil cutting creep instrument for considering drying and watering cycle, has bottom plate 4
And stent, stent include the top plate 1 above bottom plate 4 and 4 support columns 3 being fixed on top plate 1 on bottom plate 4, support column 3
It is uniformly distributed at top and four angles of bottom plate, the corner of top plate 1 is fixed at the top of support column 3 through bolt I2.
The present embodiment is equipped with opening up passive shear box 15 on bottom plate 4, and the passive top of shear box 15 sets opening
Downward active shear box 14.
The top of active shear box 14 is equipped with the normal direction load maintainer for applying normal stress to it, normal direction load maintainer and active
Rigid backing plate 9 is equipped between shear box 14.Wherein rigid 9 upper surface of backing plate is uniformly provided with some rolling steel balls, for uniformly distributed method
To stress and enable active shear box 14 that shear displacemant occurs along shear direction.Normal direction load maintainer has number in the present embodiment
Normal direction jack 8 is controlled, numerical control normal direction jack 8 is fixed on the top plate 1 of stent by normal direction jack chassis 7 and bolt II5,
The normal direction jack inlet nozzle 6 of numerical control normal direction jack 8 is arranged at the outside of normal direction jack chassis 7.
14 side of active shear box is equipped with the shearing load maintainer that can apply shear stress to it in this example, shears loading machine
Structure has numerical control shearing jack 13, and numerical control shearing jack 13 is fixed on by shearing jack chassis 12 and bolt III10
Between two support columns 3 of stent side, numerical control shearing jack 13 shearing jack inlet nozzle 11 be arranged at shearing it is very heavy
Push up the outside of chassis 12.
Active shear box 14 is corresponded in the present embodiment and is equipped with and is used to measure active shear box Normal Displacement and shearing position respectively
The Normal Displacement sensor 23 and shear displacemant sensor 22 put.Wherein Normal Displacement sensor 23 is installed on active shear box 14
On, by measuring relative displacement of the active shear box 14 relative to top plate 1, obtain active shear box Normal Displacement；Shear displacemant
Sensor 22 is mounted between two support columns 3,12 top of shearing jack chassis, by measuring active shear box 14
Relative displacement, obtains active shear box shear displacemant.
Formed when active shear box 14 is matched with passive shear box 15 in this example and be used to load the rectangular of ground sample
Body hollow cavity.Ground specimen shape is adapted with the cavity geometry that active shear box 14 and passive shear box 15 cooperatively form,
Using square large dimension specimen.The force way of square large dimension specimen optimization and succinct geometry, are effectively simplified rock
The computational methods of soil sample mechanics parameter.
It is equipped with the passive shear box 15 and active shear box 14 of the present embodiment and is realized by immersion moistening and microwave dehumidification
The drying and watering cycle system of ground sample drying and watering cycle, drying and watering cycle system include infiltration mechanism and dehumidification mechanism.
Infiltration mechanism includes being respectively arranged in the upper permeable of bottom in 14 inner top of active shear box and passive shear box 15
Plate 18 and lower porous disc 19, connection active shear box 14 is offered in upper porous disc 18 and is extended to upper outside active shear box 14
Water vapor hole 1801, the lower water vapor hole for connecting passive shear box 15 and extending to passive shear box outer 15 is offered in lower porous disc 19
1901。
Dehumidification mechanism includes being installed on the microwave generator 16 of the top of active shear box 14 and passive 15 bottom of shear box, micro-
Wave producer 16 is used to launch microwave oscillation Rock And Soil internal water molecule so as to fulfill drying.Microwave generator 16 passes through electricity
Source data line connector 17 is connected with external power supply.The present embodiment installation in active shear box 14 and the passive shear box 15
Temperature sensor 21, for measuring the temperature of ground sample in real time.
Normal direction jack inlet nozzle 6 and numerical control shearing jack inlet nozzle 11 are connected with oil pump respectively in the present embodiment；Number
Control normal direction jack, numerical control shearing jack, shear displacemant sensor, Normal Displacement sensor, temperature sensor and microwave hair
Raw device is connected with microcomputer.It is micro- after the temperature of the ground sample wherein obtained when microcomputer by temperature sensor exceedes setting high level
Machine control microwave generator 16 is stopped, and when temperature falls back to setting low value, restarts microwave generator 16 and works.
In the present embodiment when drying and watering cycle system carries out ground sample immersion moistening, upper water vapor hole 1801 connects constant
The distilled water of pressure, lower 1901 communicated drainage sink of water vapor hole.When drying and watering cycle system carries out microwave dehumidification to ground sample,
Upper and lower water vapor hole 1801,1901 connects negative pressure sucking pump.Upper and lower porous disc 18,19 uses clay permeable stone in this example
Plate, microwave have completely penetrating through property to it.
The present embodiment application considers that the Rock And Soil cutting creep instrument of drying and watering cycle carries out the specific method of shear creep test
It is as follows：
1st, sample is installed：Ground sample is positioned between active shear box 14 and passive shear box 15, ground sample bottom
Portion is placed on lower porous disc 19, porous disc 18 on apical grafting at the top of ground sample；
2nd, primary stress is applied：According to the practically stress condition residing for ground sample sampling point, ground sample is determined
Initial stress values, apply primary stress using normal direction load maintainer；
3rd, drying and watering cycle：
The access of upper water vapor hole 1801 is had to the distilled water of constant pressure, lower water vapor hole 1901 is connected to draining sink, waits and steaming
Distilled water infiltrates whole ground sample, and is discharged from lower water vapor hole 1901, maintains state certain time to realize the full of ground sample
Water process；
Upper and lower water vapor hole 1801,1901 is respectively connected to negative pressure sucking pump, opens active shear box 14 and passive shear box
Microwave generator 16 in 15, maintains state certain time to realize the drying of ground sample；
Repeat the drying and watering cycle process that full water and dehumidification realize the certain number of ground sample；
4th, normal stress is applied：Normal stress is applied using normal direction load maintainer, keeps normal direction should after reaching specified value
Power is constant；
5th, shear stress is applied：Shear stress is applied using shearing load maintainer, loads per after level-one shear stress, maintains
Shear stress is constant and continuous observation record shear creep deforms, and after shear creep stabilization, deflection is small in one day
It is considered as stabilization in 0.01mm, then applies next stage shear stress, while record the action time of upper level shear stress, until examination
Sample shear creep destroys；
6th, repeat to test：Adjust different brackets normal stress, repeat step 1~5；
7th, shearing strain is calculated：
Wherein, ε is shearing strain；κ deforms for shear creep；L is length of the ground sample along shear direction.
8th, result treatment：Draw under the effect of different brackets normal stress, undergo Rock And Soil after certain number drying and watering cycle
Shearing strain and the relation curve of time.
The present embodiment application considers that the specific method of the Rock And Soil cutting creep instrument progress direct shear test of drying and watering cycle is as follows：
1st, sample is installed：Ground sample is positioned between active shear box 14 and passive shear box 15, ground sample bottom
Portion is placed on lower porous disc 19, porous disc 18 on apical grafting at the top of ground sample；
2nd, primary stress is applied：According to the practically stress condition residing for ground sample sampling point, ground sample is determined
Initial stress values, apply primary stress using normal direction load maintainer；
3rd, drying and watering cycle：
The access of upper water vapor hole 1801 is had to the distilled water of constant pressure, lower water vapor hole 1901 is connected to draining sink, waits and steaming
Distilled water infiltrates whole ground sample, and is discharged from lower water vapor hole 1901, maintains state certain time to realize the full of ground sample
Water process；
Upper and lower water vapor hole 1801,1901 is respectively connected to negative pressure sucking pump, opens active shear box 14 and passive shear box
Microwave generator 16 in 15, maintains state certain time to realize the drying of ground sample；
Repeat the drying and watering cycle process that full water and dehumidification realize the certain number of ground sample；
4th, normal stress is applied：Normal stress is applied using normal direction load maintainer, keeps normal direction should after reaching specified value
Power is constant；
5th, shear stress is applied：Shear stress is applied using shearing load maintainer step by step, adds level-one at regular intervals, directly
To ground sample failure by shear；
6th, repeat to test：Adjust different brackets normal stress, repeat step 1~5；
7th, normal stress σ and shear stress τ is calculated：
Wherein, σ is normal stress；τ is shear stress；G is the gross weight of active shear box and rigid backing plate；PvFor normal direction
The output of load maintainer；PhTo shear the output of load maintainer；A is the section of shear of ground sample.
8th, result treatment：The normal stress of each sample and shear stress point are painted in coordinate diagram, fitting normal stress and
Shear stress relation curve, determines the shear strength parameter of Rock And Soil after the certain number drying and watering cycle of experience.
Claims (10)
- A kind of 1. Rock And Soil cutting creep instrument for considering drying and watering cycle, it is characterised in that：With bottom plate (4), bottom plate (4) is equipped with Opening up passive shear box (15), passive shear box (15) is interior to place ground sample, is set above passive shear box (15) The active shear box (14) that Open Side Down, active shear box (14) are covered on the ground sample；The normal direction load maintainer for applying normal stress to it, normal direction load maintainer and master are equipped with the top of the active shear box (14) Rigid backing plate (9) is equipped between dynamic shear box (14), rigid backing plate (9) end face is uniformly provided with some rolling steel balls；Actively shear Box (14) side is equipped with the shearing load maintainer for applying shear stress to it；Corresponding active shear box (14) is equipped with the normal direction for being used for measuring active shear box (14) Normal Displacement and clipped position respectively Displacement sensor (23) and shear displacemant sensor (22)；It is equipped with the passive shear box (15) and active shear box (14) and realizes that ground tries by immersion moistening and microwave dehumidification The drying and watering cycle system of sample drying and watering cycle.
- 2. the Rock And Soil cutting creep instrument according to claim 1 for considering drying and watering cycle, it is characterised in that：The dry and wet is followed Loop system includes infiltration mechanism and dehumidification mechanism；Wherein infiltrating mechanism includes being respectively arranged in the upper of active shear box (14) inner top and passive shear box (15) interior bottom Porous disc (18) and lower porous disc (19), wherein offering connection active shear box (14) in upper porous disc (18) and extending to master The dynamic upper water vapor hole (1801) of shear box (14) outside, lower porous disc (19) is interior to be offered the passive shear box (15) of connection and extends to The passive lower water vapor hole (1901) of shear box (15) outside；The dehumidification mechanism includes the microwave generator being installed in the active shear box (14) and passive shear box (15) (16)；When drying and watering cycle system carries out ground sample immersion moistening, the distillation of upper water vapor hole (1801) connection constant pressure Water, lower water vapor hole (1901) communicated drainage sink；When drying and watering cycle system carries out microwave dehumidification to ground sample, upper and lower water vapor hole (1801,1901) connects negative pressure pumping Air pump.
- 3. the Rock And Soil cutting creep instrument according to claim 2 for considering drying and watering cycle, it is characterised in that：It is described passively to cut Cut the temperature sensor (21) for being equipped with box (15) and active shear box (14) and being used for measuring ground specimen temperature, the microwave hair Raw device (16) works according to the ground specimen temperature that temperature sensor (21) measures.
- 4. the Rock And Soil cutting creep instrument of the consideration drying and watering cycle according to Claims 2 or 3, it is characterised in that：On described, Lower porous disc (18,19) uses the permeable slabstone of clay.
- 5. the Rock And Soil cutting creep instrument according to claim 1 for considering drying and watering cycle, it is characterised in that：The normal direction adds Mounted mechanism has numerical control normal direction jack (8), and the shearing load maintainer has numerical control shearing jack (13).
- 6. the Rock And Soil cutting creep instrument of drying and watering cycle is considered according to claim 1 or 5, it is characterised in that：The method It is fixed on to load maintainer and shearing load maintainer through stent on the bottom plate (4).
- 7. the Rock And Soil cutting creep instrument according to claim 1 for considering drying and watering cycle, it is characterised in that：The ground examination Sample uses square large dimension specimen, the cavity geometry and institute that the passive shear box (15) is cooperatively formed with active shear box (14) Ground sample is stated to be adapted.
- 8. the side that the Rock And Soil cutting creep instrument of drying and watering cycle is tested is considered described in application claim 1~7 any one Method, it is characterised in that：8.1st, sample is installed：Ground sample is positioned between active shear box (14) and passive shear box (15), ground sample Bottom is placed on lower porous disc (19), porous disc (18) on apical grafting at the top of ground sample；8.2nd, primary stress is applied：According to the practically stress condition residing for ground sample sampling point, the first of ground sample is determined Beginning stress value, applies primary stress using normal direction load maintainer；8.3rd, drying and watering cycle：Upper water vapor hole (1801) access is had to the distilled water of constant pressure, lower water vapor hole (1901) is connected to draining sink, waits and steaming Distilled water infiltrates whole ground sample, and is discharged from lower water vapor hole (1901), maintains state certain time to realize ground sample Full water process；Upper and lower water vapor hole (1801,1901) is respectively connected to negative pressure sucking pump, opens active shear box (14) and passive shear box (15) microwave generator (16) in, maintains state certain time to realize the drying of ground sample；Repeat the drying and watering cycle process that full water and dehumidification realize the certain number of ground sample；8.4th, normal stress is applied：Normal stress is applied using normal direction load maintainer, normal stress is kept after reaching specified value It is constant；8.5th, shear stress is applied：Shear stress is applied using shearing load maintainer, loads per after level-one shear stress, maintains to cut Shearing stress is constant and continuous observation record shear creep deforms, and after shear creep stabilization, deflection is less than in one day 0.01mm is considered as stabilization, then applies next stage shear stress, while records the action time of upper level shear stress, until sample Shear creep destroys；8.6th, repeat to test：Adjust different brackets normal stress, repeat step 8.1~8.5；8.7th, shearing strain is calculated：<mrow> <mi>&epsiv;</mi> <mo>=</mo> <mfrac> <mi>&kappa;</mi> <mi>L</mi> </mfrac> </mrow>Wherein, ε is shearing strain；κ deforms for shear creep；L is length of the ground sample along shear direction.8.8th, result treatment：Draw under the effect of different brackets normal stress, undergo cutting for Rock And Soil after certain number drying and watering cycle Strain and the relation curve of time.
- 9. the side that the Rock And Soil cutting creep instrument of drying and watering cycle is tested is considered described in application claim 1~7 any one Method, it is characterised in that：9.1st, sample is installed：Ground sample is positioned between active shear box (14) and passive shear box (15), ground sample Bottom is placed on lower porous disc (19), porous disc (18) on apical grafting at the top of ground sample；9.2nd, primary stress is applied：According to the practically stress condition residing for ground sample sampling point, the first of ground sample is determined Beginning stress value, applies primary stress using normal direction load maintainer；9.3rd, drying and watering cycle：Upper water vapor hole (1801) access is had to the distilled water of constant pressure, lower water vapor hole (1901) is connected to draining sink, waits and steaming Distilled water infiltrates whole ground sample, and is discharged from lower water vapor hole (1901), maintains state certain time to realize ground sample Full water process；Upper and lower water vapor hole (1901) is respectively connected to negative pressure sucking pump, opens active shear box (14) and passive shear box (15) Interior microwave generator (16), maintains state certain time to realize the drying of ground sample；Repeat the drying and watering cycle process that full water and dehumidification realize the certain number of ground sample；9.4th, normal stress is applied：Normal stress is applied using normal direction load maintainer, normal stress is kept after reaching specified value It is constant；9.5th, shear stress is applied：Shear stress is applied using shearing load maintainer step by step, adds level-one at regular intervals, until Ground sample failure by shear；9.6th, repeat to test：Adjust different brackets normal stress, repeat step 9.1~9.5；9.7th, normal stress σ and shear stress τ is calculated：<mfenced open = "" close = "}"> <mtable> <mtr> <mtd> <mrow> <mi>&sigma;</mi> <mo>=</mo> <mfrac> <mrow> <msub> <mi>P</mi> <mi>v</mi> </msub> <mo>+</mo> <mi>G</mi> </mrow> <mi>A</mi> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>&tau;</mi> <mo>=</mo> <mfrac> <msub> <mi>P</mi> <mi>h</mi> </msub> <mi>A</mi> </mfrac> </mrow> </mtd> </mtr> </mtable> </mfenced>Wherein, σ is normal stress；τ is shear stress；G is the gross weight of active shear box (14) and rigid backing plate (9)；PvFor method To the output of load maintainer；PhTo shear the output of load maintainer；A is the section of shear of ground sample.9.8th, result treatment：The normal stress of each sample and shear stress point are painted in coordinate diagram, normal stress is fitted and cuts Shearing stress relation curve, determines the shear strength parameter of Rock And Soil after the certain number drying and watering cycle of experience.
- 10. test method according to claim 8 or claim 9, it is characterised in that：In drying, work as temperature sensor (21) after the ground specimen temperature measured exceedes setting high level, stop microwave generator (16) work, treat that temperature falls back to setting During low value, start microwave generator (16) work.
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