CN110068512A - A kind of coupled heat-moisture-stress acts on lower Soil Direct Shear experimental rig and application method - Google Patents
A kind of coupled heat-moisture-stress acts on lower Soil Direct Shear experimental rig and application method Download PDFInfo
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- CN110068512A CN110068512A CN201910400439.6A CN201910400439A CN110068512A CN 110068512 A CN110068512 A CN 110068512A CN 201910400439 A CN201910400439 A CN 201910400439A CN 110068512 A CN110068512 A CN 110068512A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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Abstract
Lower Soil Direct Shear experimental rig is acted on the present invention relates to a kind of coupled heat-moisture-stress and application method, the device include model casing, direct shear apparatus, water system, temperature control system and data collection system；The direct shear apparatus includes displacement controller, transmission rod, thrust bearing, shear box, pressure transmission plate and ring of measuring one's own ability；The transmission rod, thrust bearing, shear box, pressure transmission plate, ring of measuring one's own ability are arranged in the model casing；Water system is used to carry out sample drying and watering cycle, and temperature control system is used for the temperature of Control Assay, and direct shear apparatus is used to carry out sample shearing test, and data collection system is used for the moisture content and temperature acquisition of sample；The application method is easy to operate, it is easy, easily controllable to adjust；The present invention solves the defect that existing apparatus is unable to satisfy test soil body shearing strength under coupled heat-moisture-stress effect, it realizes under coupled heat-moisture-stress effect, the shearing strength of the soil body is measured, measurement result is more accurate, provides basis for the coupled heat-moisture-stress research of the soil body.
Description
Technical field
The present invention relates to geotechnical engineering geotechnical testament technical field, specifically a kind of coupled heat-moisture-stress acts on the lower soil body
Direct shear test device and application method.
Background technique
The shearing strength of the soil body is an important parameter in geotechnical engineering design link, is calculating foundation bearing capacity, is commenting
All need to use the Shear Strength Index of the soil body in the engineering problems such as valence foundation stability, so, the Accurate Determining soil body it is anti-
Intensity is cut to be of great significance for geotechnical engineering.
The shallow surface soil body is the main object in geotechnical engineering construction, due to by weather and its self weight or other additional
The influence of load, stress field, moisture field and temperature field in swelled ground are continually changing, and are influenced each other, i.e., so-called
Coupled heat-moisture-stress effect.Therefore, the shearing strength of the Accurate Determining soil body needs to consider the influence of coupled heat-moisture-stress.
Currently, there is the method for many test soil shear strengths, wherein direct shear test is measurement soil shear strength
Most easy and most common method.But the current direct shear apparatus in measurement soil shear strength is also unable to satisfy hydro-thermal couple of force
Cooperate the test demand tested with lower soil shear strength.
Therefore, how a kind of coupled heat-moisture-stress is provided and acts on lower Soil Direct Shear experimental rig and application method, is existed with realizing
Under coupled heat-moisture-stress effect, the shearing strength of the soil body is tested, the accuracy of test result is improved, is current those skilled in the art
Technical problem urgently to be resolved.
Summary of the invention
In view of this, a kind of coupled heat-moisture-stress of being designed to provide of the application acts on lower Soil Direct Shear experimental rig and makes
The shearing strength of the soil body is tested, the accuracy of test result is improved to be realized under coupled heat-moisture-stress effect with method.
In order to achieve the above object, the application provides the following technical solutions.
A kind of lower Soil Direct Shear experimental rig of coupled heat-moisture-stress effect, including model casing, direct shear apparatus, water system, temperature
Control system and data collection system；
The direct shear apparatus includes displacement controller, transmission rod, thrust bearing, shear box, pressure transmission plate and ring of measuring one's own ability；The power transmission
Bar, thrust bearing, shear box, pressure transmission plate, ring of measuring one's own ability are arranged in the model casing.
Preferably, described transmission rod one end connects the displacement controller, and the other end connects the thrust bearing；The shearing
Box is located on the thrust bearing；The ring of measuring one's own ability is connect with shear box.
Preferably, the shear box includes upper shear box and lower shear box, the upper shear box and the lower shear box it
Between be connected and fixed by fixed pin；
The upper shear box is connected with stress block, and the stress block is being located at the opposite direction connection connecting with upper shear box
There is steel ball, the steel ball is contacted with the ring of measuring one's own ability.
Preferably, the thrust bearing bottom is provided with several balls, for moving thrust bearing in model casing.
Preferably, shear box bottom surrounding is provided with protrusion, and inner limited block and outer limit are provided on the thrust bearing
Position block, the inner limited block and outer limited block are for fixing the protrusion, and then the fixed shear box；
Recessed channel is provided on the thrust bearing, the shear box bottom is equipped with several roundlets in cross-shaped arrangement
Hole is used to form the channel into shear box into draining.
Preferably, the water system includes water valve, drainpipe and water tank；
The drainpipe is connect with the water tank, and the drainpipe passes through the model casing and thrust bearing.
Preferably, the water valve includes water inlet valve and a drain valve, and the row adjacent with the water tank is arranged in the inlet valve
On water pipe, the drain valve is arranged below on the drainpipe of shear box bottom.
Preferably, the temperature control system includes cold air transporting hose, heating plate and refrigerating plant；
The heating plate is arranged on the inner sidewall of the model casing, passes through between the refrigerating plant and the model casing
The connection of cold air transporting hose；
The cold air transporting hose includes charge transfer hose and outlet transporting hose；
The charge transfer hose and outlet transporting hose be separately fixed at model casing top setting with its Xiang Shi
On the circular hole matched.
Preferably, the data collection system includes that moisture sensor, moisture content information acquisition unit, temperature information are adopted
Collect unit and temperature sensor；
The moisture sensor is connect with moisture content information acquisition unit, and the temperature sensor and temperature information acquire
Unit connection；
The moisture sensor and temperature sensor are arranged in the shear box, the moisture content information collection list
Member and temperature information acquisition unit are arranged on the bottom plate in the model casing.
A kind of coupled heat-moisture-stress acts on the application method of lower Soil Direct Shear experimental rig, comprising the following steps:
101, according to requirement of engineering, need to prepare 4 for cutting under four kinds of different vertical pressures by dry density and moisture content
Cut the sample of test；
102, after step 101, it is sequentially placed lower permeable stone, sample, upper dankness stone in lower shear box, is then aligned with and cuts
Box and lower shear box are cut, fixed pin is finally inserted and is fixed；
103, after step 102, by displacement controller, the steel ball for connecting shear box front end stress block just with measure one's own ability
Ring contact, counterweight is put on pressure transmission plate；
104, it after step 103, consolidates to sample to stable state, is freezed by temperature control system to sample, made
Heat treatment, i.e., freeze to sample by refrigerating plant, or heated by heating plate to sample, realizes Frozen-thawed cycled；
105, it after step 104, supplied water, drained into shear box by water system, i.e., by opening inlet valve, the row of closing
Water valve, to shear box in supply water, impregnate sample, reach the state of " wet "；Inlet valve is closed, drain valve is opened, it will be in shear box
Water discharge, simulation soil sample spontaneously dry state；
106, step 104 and 105 is repeated；
107, after step 106, data are carried out by moisture sensor information acquisition unit and temperature information acquisition unit
Acquisition, the moisture and temperature change of sample during whole process record test；
108, when sample moisture content becomes original state moisture content, fixed pin is pulled out, carries out shearing test, measures sample
Shearing strength.
Present invention advantageous effects obtained:
1) present invention solve existing apparatus be unable to satisfy test the soil body coupled heat-moisture-stress effect under shearing strength lack
It falls into, the present invention realizes under coupled heat-moisture-stress effect, measures the shearing strength of the soil body, the shearing resistance of the more Accurate Determining soil body is strong
Degree provides basis for the coupled heat-moisture-stress research of the soil body；
2) present invention is by setting temperature control system and water system, and is customized for applying the weight of pressure at right angle
Code realizes the real coupling of hydro-thermal power, while the adjusting of each system is easy, easily controllable, can meet different degrees of hydro-thermal couple of force
It closes and requires；
3) present invention setting data collection system, i.e., adopted by moisture content information acquisition unit, temperature information acquisition unit
Collect the moisture content and temperature in sample, realizes real-time monitoring record, improve the precision of measurement result.
Above description is only the general introduction of technical scheme, in order to better understand the technological means of the application,
So as to be implemented in accordance with the contents of the specification, and in order to allow the above and other objects, features and advantages energy of the application
It is enough clearer and more comprehensible, with the preferred embodiment of the application and cooperates attached drawing below detailed description is as follows.
According to the accompanying drawings to the detailed description of the application specific embodiment, those skilled in the art will be brighter
The above-mentioned and other purposes of the application, advantages and features.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the application
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.In all the appended drawings, similar element or part are generally identified by similar appended drawing reference.
In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the orthogonal view that the present invention surveys that coupled heat-moisture-stress acts on lower Soil Direct Shear experimental rig；
Fig. 2 is the right sectional view that the present invention surveys that coupled heat-moisture-stress acts on lower Soil Direct Shear experimental rig；
Fig. 3 is the plan view of direct shear apparatus in the present invention；
Fig. 4 is the plan view of thrust bearing in the present invention；
Fig. 5 is the floor plan of heating plate in the present invention.
In the figures above: 1, displacement controller；2, transmission rod；3, cold air transporting hose；4, model casing；5, heating plate；
6, refrigerating plant；7, thrust bearing；8, ball；9, fixed pin；10, shear box；101, upper shear box；102, lower shear box；11, it passes
Pressing plate；121, upper dankness stone；122, lower permeable stone；13, it measures one's own ability ring；14, moisture content information acquisition unit；15, moisture content senses
Device；16, sample；17, temperature sensor；18, temperature information acquisition unit；19, water tank；201, inlet valve；202, drain valve；
21, drainpipe；22, steel ball；23, stress block；24, inner limited block；25, outer limited block.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.In the following description, such as specific configuration and component are provided
Specific detail just for the sake of help comprehensive understanding embodiments herein.It therefore, it will be apparent to those skilled in the art that can
To make various changes and modifications the embodiments described herein without departing from the scope and spirit of the present application.In addition, in order to clear
The description to known function and construction is omitted with succinctly in Chu in embodiment.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate: individualism A, individualism B exist simultaneously tri- kinds of situations of A and B, the terms
"/and " it is to describe another affiliated partner relationship, indicate may exist two kinds of relationships, for example, A/ and B, can indicate: individually depositing
In A, two kinds of situations of individualism A and B, in addition, character "/" herein, typicallying represent forward-backward correlation object is a kind of "or" pass
System.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion.
Embodiment 1
As shown in attached drawing 1-2, a kind of lower Soil Direct Shear experimental rig of coupled heat-moisture-stress effect, including model casing 4, staight scissors
Instrument, water system, temperature control system and data collection system；The water system is used to carry out drying and watering cycle to sample 16；
The temperature control system is used for the temperature of Control Assay 16；The direct shear apparatus is used to carry out shearing test to sample 16；It is described
Data collection system is used for the moisture content and temperature acquisition of sample 16.
As shown in Fig. 3, the direct shear apparatus includes displacement controller 1, transmission rod 2, thrust bearing 7, shear box 10, pressure transmission plate
11 and ring 13 of measuring one's own ability；The transmission rod 2, thrust bearing 7, shear box 10, pressure transmission plate 11, ring 13 of measuring one's own ability are arranged at the model casing
In 4, the setting of displacement controller 1 is in 4 outside of model casing；When test, sample 16 is placed on shear box 10, and is tried
16 upper and lower of sample places upper dankness stone 121 and lower permeable stone 122 respectively.
The pressure transmission plate 11 is arranged on 10 top of shear box, for placing counterweight, applies pressure at right angle to sample 16,
It is 100kPa, 200kPa, 300kPa, 400kPa that counterweight, which need to meet 16 vertical attached power of sample,.
Described 2 one end of transmission rod connects the displacement controller 1, and the other end connects the thrust bearing 7；The transmission rod 2
Across model casing 4, the displacement controller 1 drives thrust bearing 7 to move left and right by transmission rod 2；The shear box 10 is located at institute
It states on thrust bearing 7；The ring 13 of measuring one's own ability is connect with shear box 10.
The shear box 10 includes upper shear box 101 and lower shear box 102, the upper shear box 101 and the lower shearing
It is connected and fixed between box 102 by fixed pin 9, the upper shear box 101 is connected with stress block 23, and the stress block 23 is being located at
The opposite direction connecting with upper shear box 101 is connected with steel ball 22, the steel ball 22 and 13 end thereof contacts of ring of measuring one's own ability, described
The other end of ring 13 of measuring one's own ability is fixed on the model casing 4.
7 bottom of thrust bearing, which is provided with several balls 8, moves thrust bearing 7 in model casing 4.
Preferably, the model casing 4 be provided with guide rail on the contact surface of the thrust bearing 7, the ball 8 with it is described
Guide rail matches, for moving thrust bearing 7 in model casing 4.
Preferably, the bottom setting of the thrust bearing 7 is fluted, the groove for fixing ball 8, prevent ball 8 to
Surrounding arbitrarily rolls.
The 10 bottom surrounding of shear box is provided with protrusion, is provided with inner limited block 24 and outer limit on the thrust bearing 7
Block 25, as shown in Fig. 4, the inner limited block 24 and outer limited block 25 keep shear box 10 solid for fixing the protrusion
It is scheduled on thrust bearing 7.
Recessed channel is provided on the thrust bearing 7, lower 102 bottom of shear box is equipped in the several of cross-shaped arrangement
Small sircle hole is used to form the channel into shear box 10 into draining.
The water system includes water valve, drainpipe 21 and water tank 19；The drainpipe 21 is connect with the water tank 19, institute
Drainpipe 21 is stated across the model casing 4 and thrust bearing 7, the contact position of the drainpipe 21 and model casing 4, thrust bearing 7 is arranged
There is sealing ring, and one end of drainpipe 21 is fixed on the circular hole compatible with 21 aperture of drainpipe being arranged on the thrust bearing 7
On.
Preferably, the outside of the model casing 4 is arranged in the water tank 19, and the position of the water tank 19 is slightly above described
Sample 16, convenient for supplying water into shear box 10.
The water valve includes inlet valve 201 and drain valve 202, and the inlet valve 201 is arranged adjacent with the water tank 19
Drainpipe 21 on, for water in water tank 19 to be imported in shear box 10；The drain valve 202 is arranged below shear box 10
On the drainpipe 21 of bottom, for the water in shear box 10 to be exported.
The temperature control system includes cold air transporting hose 3, heating plate 5 and refrigerating plant 6；As shown in Fig. 5, described
Heating plate 5 is arranged on the inner sidewall of the model casing 4, and is located at the top of the shear box 10.
It is connected between the refrigerating plant 6 and the model casing 4 by cold air transporting hose 3, the cold air transporting hose 3
Including charge transfer hose and outlet transporting hose；The charge transfer hose and outlet transporting hose are separately fixed at the mould
On the matched circular hole of 4 top of molding box setting, and charge transfer hose and outlet transporting hose are taken with 4 top of model casing
The place of connecing is provided with sealing structure, and model casing 4 is made to form confined space, reduces the energy consumption waste in test process, improves test effect
Rate.
The data collection system includes moisture sensor 15, moisture content information acquisition unit 14, temperature information acquisition
Unit 18 and temperature sensor 17；The moisture sensor 15 is connect with moisture content information acquisition unit 14, and the temperature passes
Sensor 17 is connect with temperature information acquisition unit 18.
The moisture sensor 15 and temperature sensor 17 are arranged inside the sample 16 in the shear box 10, institute
It states moisture content information acquisition unit 14 and temperature information acquisition unit 18 is arranged on the bottom plate in the model casing 4；It is described
Two pairs of apertures are provided on the relative position of thrust bearing 7 and shear box 10 to pass with 17 connecting line of temperature sensor and moisture content respectively
The compatible circular hole of 15 connecting line of sensor, connecting line pass through circular hole and temperature information acquisition unit 18, moisture content information collection list
Member 14 connects.
Preferably, 4 top of model casing is provided with top cover, convenient for repairing, maintaining to device.
Embodiment 2
Based on the above embodiment 1, a kind of coupled heat-moisture-stress acts on the application method of lower Soil Direct Shear experimental rig, including with
Lower step:
101, according to requirement of engineering, need to prepare 4 for cutting under four kinds of different vertical pressures by dry density and moisture content
Cut the sample 16 of test；
102, after step 101, lower permeable stone 122, sample 16, upper dankness stone 121 are sequentially placed in lower shear box 102,
It is then aligned with shear box 101 and lower shear box 102, fixed pin 9 is finally inserted and is fixed；
103, after step 102, by displacement controller 1, the steel ball 22 for connecting 101 front end stress block 23 of shear box is rigid
It is good to be contacted with ring 13 of measuring one's own ability, counterweight is put on pressure transmission plate 11；
104, it after step 103, consolidates to sample 16 to stable state, sample 16 is made by temperature control system
Cold, heating processing, i.e., freeze to sample 16 by refrigerating plant 6, or heated by heating plate 5 to sample 16, real
Existing Frozen-thawed cycled；
105, it after step 104, supplied water, drained into shear box 10 by water system, i.e., by opening inlet valve 201,
Drain valve 202 is closed, to the inner water supply of shear box 10, sample 16 is impregnated, reaches the state of " wet "；Inlet valve 201 is closed, the row of opening
Water in shear box 10 is discharged water valve 202, and simulation soil sample spontaneously dries state；
106, step 104 and 105 is repeated；
107, it after step 106, is carried out by 15 information acquisition unit of moisture sensor and temperature information acquisition unit 18
Data acquisition, the moisture and temperature change of sample 16 during whole process record test；
108, when 16 moisture content of sample becomes original state moisture content, fixed pin 9 is pulled out, carries out shearing test, measurement
The shearing strength of sample 16.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit protection scope of the present invention, right
For those skilled in the art, the invention may be variously modified and varied.All within the spirits and principles of the present invention,
By conventional substitution or it can be realized identical function without departing from the principles and spirit of the present invention to these
Embodiment is changed, modifies, replacing, integrating and parameter modification is fallen within the protection scope of the present invention.
Claims (10)
1. a kind of coupled heat-moisture-stress acts on lower Soil Direct Shear experimental rig, which is characterized in that including model casing (4), direct shear apparatus, confession
Water system, temperature control system and data collection system；
The direct shear apparatus includes displacement controller (1), transmission rod (2), thrust bearing (7), shear box (10), pressure transmission plate (11) and amount
Power ring (13)；Described in the transmission rod (2), thrust bearing (7), shear box (10), pressure transmission plate (11), ring of measuring one's own ability (13) are arranged at
In model casing (4).
2. coupled heat-moisture-stress according to claim 1 acts on lower Soil Direct Shear experimental rig, which is characterized in that the power transmission
Bar (2) one end connects the displacement controller (1), and the other end connects the thrust bearing (7)；The shear box (10) is located at described
On thrust bearing (7)；The ring of measuring one's own ability (13) connect with shear box (10).
3. coupled heat-moisture-stress according to claim 1 acts on lower Soil Direct Shear experimental rig, which is characterized in that the shearing
Box (10) includes upper shear box (101) and lower shear box (102), the upper shear box (101) and the lower shear box (102) it
Between be connected and fixed by fixed pin (9)；
The upper shear box (101) is connected with stress block (23), and the stress block (23) connect with upper shear box (101) being located at
Opposite direction be connected with steel ball (22), the steel ball (22) contacts with the ring of measuring one's own ability (13).
4. coupled heat-moisture-stress according to claim 1-3 acts on lower Soil Direct Shear experimental rig, which is characterized in that
Thrust bearing (7) bottom is provided with several balls (8), for moving thrust bearing (7) in model casing (4).
5. coupled heat-moisture-stress according to claim 1-3 acts on lower Soil Direct Shear experimental rig, which is characterized in that
Shear box (10) bottom surrounding is provided with protrusion, is provided with inner limited block (24) and outer limited block on the thrust bearing (7)
(25), the inner limited block (24) and outer limited block (25) are for fixing the protrusion, and then the fixed shear box (10)；
Recessed channel is provided on the thrust bearing (7), shear box (10) bottom is equipped in the several small of cross-shaped arrangement
Circular hole is used to form into shear box (10) into the channel of draining.
6. coupled heat-moisture-stress according to claim 1-3 acts on lower Soil Direct Shear experimental rig, which is characterized in that
The water system includes water valve, drainpipe (21) and water tank (19)；
The drainpipe (21) connect with the water tank (19), and the drainpipe (21) passes through the model casing (4) and thrust bearing
(7)。
7. coupled heat-moisture-stress according to claim 6 acts on lower Soil Direct Shear experimental rig, which is characterized in that the water valve
Including inlet valve (201) and drain valve (202), the inlet valve (201) is arranged in the drainpipe adjacent with the water tank (19)
(21) on, the drain valve (202) is arranged below on the drainpipe (21) of shear box (10) bottom.
8. coupled heat-moisture-stress according to claim 1-3 acts on lower Soil Direct Shear experimental rig, which is characterized in that
The temperature control system includes cold air transporting hose (3), heating plate (5) and refrigerating plant (6)；
The heating plate (5) is arranged on the inner sidewall of the model casing (4), the refrigerating plant (6) and the model casing (4)
Between by cold air transporting hose (3) connect.
9. coupled heat-moisture-stress according to claim 1-3 acts on lower Soil Direct Shear experimental rig, which is characterized in that
The data collection system includes moisture sensor (15), moisture content information acquisition unit (14), temperature information acquisition unit
(18) and temperature sensor (17)；
The moisture sensor (15) connect with moisture content information acquisition unit (14), the temperature sensor (17) and temperature
Information acquisition unit (18) connection.
10. any one of -9 coupled heat-moisture-stress act on the application method of lower Soil Direct Shear experimental rig according to claim 1,
It is characterized in that, comprising the following steps:
101, it according to requirement of engineering, needs to prepare 4 by dry density and moisture content and is tried for being sheared under four kinds of different vertical pressures
The sample (16) tested；
102, after step 101, lower permeable stone (122), sample (16), upper dankness stone are sequentially placed in lower shear box (102)
(121), it is then aligned with shear box (101) and lower shear box (102), fixed pin (9) is finally inserted and is fixed；
103, after step 102, by displacement controller (1), the steel ball for connecting shear box (101) front end stress block (23)
(22) it is just contacted with ring of measuring one's own ability (13), counterweight is put on pressure transmission plate (11)；
104, it after step 103, consolidates to sample (16) to stable state, sample (16) is made by temperature control system
Cold, heating processing, i.e., freeze to sample (16) by refrigerating plant (6), or is carried out by heating plate (5) to sample (16)
Frozen-thawed cycled is realized in heating；
105, it after step 104, is supplied water by water system into shear box (10), draining, i.e., by opening inlet valve (201),
It closes drain valve (202), supplies water to shear box (10) is inner, impregnate sample (16), reach the state of " wet "；Close inlet valve
(201), drain valve (202) are opened, the inner water of shear box (10) is discharged, simulation soil sample spontaneously dries state；
106, step 104 and 105 is repeated；
107, it after step 106, is carried out by moisture sensor (15) information acquisition unit and temperature information acquisition unit (18)
Data acquisition, the moisture and temperature change of sample (16) during whole process record test；
108, it when sample (16) moisture content becomes original state moisture content, pulls out fixed pin (9), carries out shearing test, measurement
The shearing strength of sample (16).
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| CN111948031A (en) * | 2020-09-24 | 2020-11-17 | 吉林大学 | Soil body direct shear test device considering water heating power salt coupling effect |
| CN113720705A (en) * | 2021-09-28 | 2021-11-30 | 成都理工大学 | Multifunctional rock structural surface shear creep system and testing method thereof |
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| CN113720705A (en) * | 2021-09-28 | 2021-11-30 | 成都理工大学 | Multifunctional rock structural surface shear creep system and testing method thereof |
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