CN107036914A - A kind of retaining wall is with contacting soil body interface friction angle measuring device and method - Google Patents
A kind of retaining wall is with contacting soil body interface friction angle measuring device and method Download PDFInfo
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- CN107036914A CN107036914A CN201710474310.0A CN201710474310A CN107036914A CN 107036914 A CN107036914 A CN 107036914A CN 201710474310 A CN201710474310 A CN 201710474310A CN 107036914 A CN107036914 A CN 107036914A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A kind of retaining wall includes base, reaction frame, roller bearing slideway, load slide unit, shearing force and applies oil cylinder, loading force application oil cylinder, screw lift, screw lift mounting bracket, retaining wall sample shear box and contact soil body sample shear box with contacting soil body interface friction angle measuring device and method, device；Reaction frame and roller bearing slideway are packed on base, and loading force applies oil cylinder and is packed in reaction frame top vertically, and shearing force applies oil cylinder level and is packed on base, and loading force applies oil cylinder and the piston rod end of shearing force application oil cylinder is mounted on pressure sensor；Contact soil body sample shear box, retaining wall sample shear box screw lift mounting bracket load slide unit and roller bearing slideway are from top to bottom set on base.Method and step is：Prepare sample；Sample is installed；Imposed load power is to setting value；Apply shearing force to contact soil body sample failure by shear；Repeat multigroup failure by shear experiment；Loading force and shearing force straight line are fitted, the inclination angle of fitting a straight line is interface friction angle.
Description
Technical field
The invention belongs to technique of rock-soil mechanical test field, more particularly to a kind of retaining wall is with contacting soil body interface friction
Angle measuring device and method.
Background technology
During DESIGN OF RETAINING WALLS, retaining wall is that the indispensable of soil pressure distribution is joined with the interface friction angle for contacting the soil body
Number, and the order of accuarcy at interface friction angle, are also directly connected to the success or failure of the accuracy and DESIGN OF RETAINING WALLS of soil pressure distribution.
At present, retaining wall is typically according to soil body classification with the interface friction angle for contacting the soil body and provided with reference to similar engineering
Empirical value, such as《Technique Code for Building Slope Engineering》(GB50330-2013) etc., causing the numerical value at interface friction angle has phase
When the randomness of degree, easily potential safety hazard is brought to Practical Project.
Interface friction angle is obtained in order to accurate, Publication No. CN1699963A Chinese patent is non-scattered it discloses one kind
Plastochondria material friction angle analyzer, it is simultaneously uncomfortable although it can facilitate the succinct angle of friction obtained between non-granular material
For granular material.For Publication No. CN102012220A Chinese patent, it discloses a kind of bulk granular material angle of friction
Or repose angle measurement device and measuring method, although the angle of friction of bulk granular material can be obtained based on inclined-plane instrument principle, but be only capable of
The interface friction angle between bulk granular material and instrument is obtained, and the interface friction angle between two kinds of different materials can not be obtained, it is obtained
There is notable difference with contacting the interface friction angle of the soil body with the retaining wall in Practical Project in the interface friction angle taken.
The content of the invention
The problem of existing for prior art, the present invention provides a kind of retaining wall with contacting soil body interface friction angular measurement dress
Put and method, non-granular material and granular material are applicable, and acquired interface friction angle numerical value more presses close to actual value.
To achieve these goals, the present invention is adopted the following technical scheme that：A kind of retaining wall is with contacting soil body interface friction
Angle measuring device, including base, reaction frame, roller bearing slideway, load slide unit, shearing force apply oil cylinder, loading force and apply oil cylinder, silk
Bar lift, screw lift mounting bracket, retaining wall sample shear box and contact soil body sample shear box, the retaining wall sample
Shear box and contact soil body sample shear box use cylinder barrel shaped structure；Reaction frame and the roller bearing slideway is packed in base
On, the loading force applies oil cylinder and is packed in reaction frame top vertically, and the piston rod of loading force application oil cylinder is set down,
The piston rod end that loading force applies oil cylinder is provided with first pressure sensor；The load slide unit is located on roller bearing slideway, holds
Power slide unit has the rectilinear movement free degree on roller bearing slideway；The shearing force applies oil cylinder level and is packed on base, shears
Power applies the piston rod of oil cylinder towards load slide unit, and the stopper rod end for applying oil cylinder in shearing force is provided with second pressure sensing
Device；The screw lift is vertically installed on load slide unit by screw lift mounting bracket, the retaining wall sample shearing
Box is arranged on screw lift mounting bracket top, and the lifting tray of screw lift is located in retaining wall sample shear box, and
The lifting tray of screw lift coordinates with retaining wall sample shear box internal surface gaps；The contact soil body sample shear box is set
Put at the top of retaining wall sample shear box, and contact soil body sample shear box is located under loading force applies the piston rod of oil cylinder just
Side.
The spacer pin of plug-in type is installed between the load slide unit and base.
Apply the piston rod of oil cylinder with contacting in the loading force and be fitted with washer successively between soil body sample shear box
Block and pad, and the diameter of pad is equal to the internal diameter for contacting soil body sample shear box.
The top nozzle of the retaining wall sample shear box is fitted with detachable position-arresting disk.
The internal diameter size of the contact soil body sample shear box is less than the internal diameter size of retaining wall sample shear box.
The first pressure sensor and second pressure sensor are connected to the first digital display meter and the second digital display meter, lead to
The load force data that the first digital display meter directly reads the collection of first pressure sensor is crossed, second is directly read by the second digital display meter
The shearing force data of pressure sensor collection.
A kind of retaining wall employs described retaining wall with contacting soil body circle with contacting soil body interface friction angle measuring method
Face friction angle measurement device, comprises the following steps：
Step one：Prepare sample
Columned retaining wall original core is obtained by core drilling rig first, then retaining wall original core is cut
Piece, and then retaining wall sample is made；Meanwhile, by fetching earth, cutting ring directly prepares contact soil body sample；
Step 2：Retaining wall sample is installed
Retaining wall sample is placed in retaining wall sample shear box first, and is seated in the lifting tray of screw lift
On；Position-arresting disk is installed to the top tube port position of retaining wall sample shear box by bolt, then starts screw lift, makes liter
Pallet and retaining wall sample gradually lifting thereon are dropped, until retaining wall sample upper surface is brought into close contact with position-arresting disk lower surface, most
Position-arresting disk is unloaded afterwards；
Step 3：Contact soil body sample is installed
Contact soil body sample shear box is placed at the top of retaining wall sample shear box first, then by connecing in cutting ring of fetching earth
Tactile soil body sample is moved in contact soil body sample shear box, and is seated on retaining wall sample；
Step 4：Pad and force transmission shaft are sequentially placed in contact soil body sample upper surface；
Step 5：Start loading force and apply oil cylinder, control load power applies stretches under the piston rod of oil cylinder, to contact soil body examination
Sample at the uniform velocity imposed load power, gathers loading force numerical value, and supervise in real time by the first digital display meter in real time by first pressure sensor
Apparent load power numerical value change, until loading force reaches setting value；
Step 6：The spacer pin between load slide unit and base is pulled up, then starts shearing force and applies oil cylinder, control shearing
The piston rod that power applies oil cylinder stretches out, and passes sequentially through load slide unit, screw lift mounting bracket, retaining wall sample shear box and gear
Cob wall sample at the uniform velocity applies shearing force to contact soil body sample, and shearing force numerical value is gathered in real time by second pressure sensor, and
Shearing force numerical value change is monitored by the second digital display meter in real time, until contact soil body sample generation failure by shear, and this is recorded
When shearing force numerical value；
Step 7：The contact soil body sample failure by shear for repeating some groups is tested, and in follow-up several groups contact soil
In the experiment of body sample failure by shear, the setting value of loading force need to gradually increase, and the loading force in the experiment of each group failure by shear is set
The difference of definite value is equal, and records the shearing force numerical value in every group of failure by shear experiment；
Step 8：Shearing force during failure by shear occurs for the contact soil body sample obtained in some groups of failure by shear experiments
Loading force setting value under corresponding carries out fitting a straight line, and in the coordinate system of fitting a straight line, shearing force is ordinate, load
Power is abscissa, and the inclination angle of fitting a straight line is exactly interface friction angle of the retaining wall with contacting the soil body.
Beneficial effects of the present invention：
The retaining wall of the present invention directly prepares contact soil with contacting soil body interface friction angle measuring device by the cutting ring that fetches earth
Body sample, either non-granular material and granular material be applicable, i.e., the cohesive soil often met in Practical Project and non-glutinous
Property soil.
When carrying out laboratory test, shearing force applies oil cylinder, loading force application oil cylinder and screw lift and can select certainly
Dynamic formula, when carrying out field site test, shearing force applies oil cylinder, loading force and applies the optional hand of oil cylinder and screw lift
Dynamic formula, improves flexibility and the scope of application of the present invention.
The present invention is designed based on coulomb shearing law, it is ensured that the interface friction angle number obtained in shearing test
Value more presses close to actual value.
Brief description of the drawings
For a kind of retaining wall of the invention, (retaining wall sample installs rank to Fig. 1 with contacting soil body interface friction angle measuring device
Section) structural representation；
Fig. 2 for a kind of retaining wall of the invention, (apply with contacting soil body interface friction angle measuring device by loading force and shearing force
Plus the stage) structural representation；
In figure, 1-base, 2-reaction frame, 3-roller bearing slideway, 4-load slide unit, 5-shearing force application oil cylinder, 6-
Loading force applies oil cylinder, 7-screw lift, 8-screw lift mounting bracket, 9-retaining wall sample shear box, 10-contact
Soil body sample shear box, 11-first pressure sensor, 12-second pressure sensor, 13-spacer pin, 14-force transmission shaft,
15-pad, 16-position-arresting disk, 17-retaining wall sample, 18-contact soil body sample.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, 2, a kind of retaining wall with contact soil body interface friction angle measuring device, including base 1, reaction frame 2,
Roller bearing slideway 3, load slide unit 4, shearing force apply oil cylinder 5, loading force and apply oil cylinder 6, screw lift 7, screw lift peace
Shelve 8, retaining wall sample shear box 9 and contact soil body sample shear box 10, the retaining wall sample shear box 9 and the contact soil body
Sample shear box 10 uses cylinder barrel shaped structure；The reaction frame 2 and roller bearing slideway 3 are packed on base 1, the loading force
Apply oil cylinder 6 and be packed in the top of reaction frame 2 vertically, and the piston rod of loading force application oil cylinder 6 is set down, is applied in loading force
The piston rod end of oil cylinder 6 is provided with first pressure sensor 11；The load slide unit 4 is located on roller bearing slideway 3, load slide unit
4 have the rectilinear movement free degree on roller bearing slideway 3；The shearing force applies the level of oil cylinder 5 and is packed on base 1, shearing force
Apply the piston rod of oil cylinder 5 towards load slide unit 4, the stopper rod end for applying oil cylinder 5 in shearing force is provided with second pressure sensing
Device 12；The screw lift 7 is vertically installed on load slide unit 4 by screw lift mounting bracket 8, the retaining wall sample
Shear box 9 is arranged on the top of screw lift mounting bracket 8, and the lifting tray of screw lift 7 is sheared positioned at retaining wall sample
In box 9, and the lifting tray of screw lift 7 coordinates with the internal surface gaps of retaining wall sample shear box 9；The contact soil body examination
Sample shear box 10 is arranged on the top of retaining wall sample shear box 9, and contact soil body sample shear box 10 is located at loading force and applies oil
Immediately below the piston rod of cylinder 6.
The spacer pin 13 of plug-in type is installed between the load slide unit 4 and base 1.
Apply the piston rod of oil cylinder 6 with contacting in the loading force and be fitted with power transmission successively between soil body sample shear box 10
Cushion block 14 and pad 15, and the diameter of pad 15 is equal to the internal diameter for contacting soil body sample shear box 10.
The top nozzle of the retaining wall sample shear box 9 is fitted with detachable position-arresting disk 16.
The internal diameter size of the contact soil body sample shear box 10 is less than the internal diameter size of retaining wall sample shear box 9, from
And ensure that the section of shear of contact soil body sample 18 during interface friction angular measurement is constant, it is to avoid because the section of shear changes to boundary
Face friction Angle Measurements agency's adverse effect.
The first pressure sensor 11 and second pressure sensor 12 are connected to the first digital display meter and the second digital display
Table, the load force data that first pressure sensor 11 is gathered is directly read by the first digital display meter, direct by the second digital display meter
Read the shearing force data of the collection of second pressure sensor 12.
A kind of retaining wall employs described retaining wall with contacting soil body circle with contacting soil body interface friction angle measuring method
Face friction angle measurement device, comprises the following steps：
Step one：Prepare sample
Columned retaining wall original core is obtained by core drilling rig first, then retaining wall original core is cut
Piece, and then retaining wall sample 17 is made；In the present embodiment, 17 preparations of retaining wall sample are a piece of, and slice thickness is 20mm；
Contact soil body sample 18 is directly prepared by the cutting ring that fetches earth；In the present embodiment, contact soil body sample 18 prepares four parts,
And the thickness of every part of contact soil body sample 18 is 20mm；
Step 2：Retaining wall sample 17 is installed
Retaining wall sample 17 is placed in retaining wall sample shear box 9 first, and is seated in the lifting support of screw lift 7
On disk；Position-arresting disk 16 is installed to the top tube port position of retaining wall sample shear box 9 by bolt, then starts screw lift
7, make lifting tray and the thereon gradually lifting of retaining wall sample 17, until the upper surface of retaining wall sample 17 and the lower surface of position-arresting disk 16
It is brought into close contact, finally unloads position-arresting disk 16；
Step 3：Contact soil body sample 18 is installed
Contact soil body sample shear box 10 is placed into the top of retaining wall sample shear box 9 first, then will be fetched earth in cutting ring
Contact soil body sample 18 move in contact soil body sample shear box 10, and be seated on retaining wall sample 17；
Step 4：Pad 15 and force transmission shaft 14 are sequentially placed in contact soil body sample 18 upper surface；
Step 5：Start loading force and apply oil cylinder 6, control load power applies stretches under the piston rod of oil cylinder 6, to the contact soil body
The at the uniform velocity imposed load power of sample 18, passes through the collection loading force numerical value, and pass through the first digital display meter in real time of first pressure sensor 11
Loading force numerical value change is monitored in real time, until loading force reaches setting value；
Step 6：The spacer pin 13 between load slide unit 4 and base 1 is pulled up, then starts shearing force and applies oil cylinder 5, control
The piston rod that shearing force processed applies oil cylinder 5 stretches out, and passes sequentially through load slide unit 4, screw lift mounting bracket 8, retaining wall sample
17 pairs of contact soil body samples 18 of shear box 9 and retaining wall sample at the uniform velocity apply shearing force, real-time by second pressure sensor 12
Shearing force numerical value is gathered, and shearing force numerical value change is monitored by the second digital display meter in real time, until contact soil body sample 18 occurs
Failure by shear, and record shearing force numerical value now；
Step 7：The failure by shear of contact soil body sample 18 for repeating some groups is tested, and in follow-up several groups contact
In the experiment of the failure by shear of soil body sample 18, the setting value of loading force need to gradually increase, and the load in the experiment of each group failure by shear
The difference of power setting value is equal, and records the shearing force numerical value in every group of failure by shear experiment；In the present embodiment, four parts are utilized
The loading force setting value contacted in four groups of failures by shear experiments of the progress of soil body sample 18, the experiment of each group failure by shear is followed successively by
100KPa, 200KPa, 300KPa and 400KPa；
Step 8：Shearing during failure by shear occurs for the contact soil body sample 18 obtained in some groups of failure by shear experiments
Loading force setting value under power is corresponding carries out fitting a straight line, and in the coordinate system of fitting a straight line, shearing force is ordinate, carries
Load forces are abscissa, and the inclination angle of fitting a straight line is exactly interface friction angle of the retaining wall with contacting the soil body.In order to further improve
The measurement authenticity at interface friction angle, can carry out multiple parallel test, then the multiple interfaces obtained in parallel test are rubbed
Wipe angle and carry out averaged, the corresponding interface friction angle of the average value can more press close to actual value.
Scheme in embodiment and the scope of patent protection for being not used to the limitation present invention, it is all without departing from carried out by the present invention etc.
Effect is implemented or changed, and is both contained in the scope of the claims of this case.
Claims (7)
1. a kind of retaining wall is with contacting soil body interface friction angle measuring device, it is characterised in that：Including base, reaction frame, roller bearing
Slideway, load slide unit, shearing force apply oil cylinder, loading force and apply oil cylinder, screw lift, screw lift mounting bracket, earth-retaining
Wall sample shear box and contact soil body sample shear box, the retaining wall sample shear box and contact soil body sample shear box are adopted
Use cylinder barrel shaped structure；Reaction frame and the roller bearing slideway is packed on base, and the loading force applies oil cylinder and is packed in vertically
Reaction frame top, and loading force apply oil cylinder piston rod set down, loading force apply oil cylinder piston rod end install
There is first pressure sensor；The load slide unit is located on roller bearing slideway, and load slide unit has rectilinear movement on roller bearing slideway
The free degree；The shearing force applies oil cylinder level and is packed on base, and shearing force applies the piston rod of oil cylinder towards load slide unit,
The stopper rod end for applying oil cylinder in shearing force is provided with second pressure sensor；The screw lift is pacified by screw lift
Shelve and be vertically installed on load slide unit, the retaining wall sample shear box is arranged on screw lift mounting bracket top, and silk
The lifting tray of bar lift is located in retaining wall sample shear box, and the lifting tray and retaining wall sample shear of screw lift
Cut the cooperation of box internal surface gaps；The contact soil body sample shear box is arranged at the top of retaining wall sample shear box, and contact soil
Body sample shear box is located at loading force and applied immediately below the piston rod of oil cylinder.
2. a kind of retaining wall according to claim 1 is with contacting soil body interface friction angle measuring device, it is characterised in that：
The spacer pin of plug-in type is installed between the load slide unit and base.
3. a kind of retaining wall according to claim 1 is with contacting soil body interface friction angle measuring device, it is characterised in that：
The loading force applies the piston rod of oil cylinder and is fitted with force transmission shaft and pad successively between soil body sample shear box with contacting, and
The diameter of pad is equal to the internal diameter of contact soil body sample shear box.
4. a kind of retaining wall according to claim 1 is with contacting soil body interface friction angle measuring device, it is characterised in that：Institute
The top nozzle for stating retaining wall sample shear box is fitted with detachable position-arresting disk.
5. a kind of retaining wall according to claim 1 is with contacting soil body interface friction angle measuring device, it is characterised in that：Institute
The internal diameter size for stating contact soil body sample shear box is less than the internal diameter size of retaining wall sample shear box.
6. a kind of retaining wall according to claim 1 is with contacting soil body interface friction angle measuring device, it is characterised in that：Institute
State first pressure sensor and second pressure sensor is connected to the first digital display meter and the second digital display meter, pass through the first digital display
Table directly reads the load force data of first pressure sensor collection, and second pressure sensor is directly read by the second digital display meter
The shearing force data of collection.
7. a kind of retaining wall employs the retaining wall described in claim 1 with connecing with contacting soil body interface friction angle measuring method
Touch soil body interface friction angle measuring device, it is characterised in that comprise the following steps：
Step one：Prepare sample
Columned retaining wall original core is obtained by core drilling rig first, then retaining wall original core is cut into slices, is entered
And retaining wall sample is made；Meanwhile, by fetching earth, cutting ring directly prepares contact soil body sample；
Step 2：Retaining wall sample is installed
Retaining wall sample is placed in retaining wall sample shear box first, and is seated on the lifting tray of screw lift；Will
Position-arresting disk is installed to the top tube port position of retaining wall sample shear box by bolt, then starts screw lift, holds in the palm lifting
Disk and the thereon gradually lifting of retaining wall sample, until retaining wall sample upper surface is brought into close contact with position-arresting disk lower surface, finally will
Position-arresting disk is unloaded；
Step 3：Contact soil body sample is installed
Contact soil body sample shear box is placed at the top of retaining wall sample shear box first, then the contact fetched earth in cutting ring is native
Body sample is moved in contact soil body sample shear box, and is seated on retaining wall sample；
Step 4：Pad and force transmission shaft are sequentially placed in contact soil body sample upper surface；
Step 5：Start loading force and apply oil cylinder, control load power applies stretches under the piston rod of oil cylinder, even to contact soil body sample
Fast imposed load power, gathers loading force numerical value, and monitor load in real time by the first digital display meter in real time by first pressure sensor
Load forces numerical value change, until loading force reaches setting value；
Step 6：The spacer pin between load slide unit and base is pulled up, then starts shearing force and applies oil cylinder, control shearing force is applied
The piston rod of oiling cylinder stretches out, and passes sequentially through load slide unit, screw lift mounting bracket, retaining wall sample shear box and retaining wall
Sample at the uniform velocity applies shearing force to contact soil body sample, gathers shearing force numerical value in real time by second pressure sensor, and pass through
Second digital display meter monitors shearing force numerical value change in real time, until contact soil body sample generation failure by shear, and records now
Shearing force numerical value；
Step 7：Repeat some groups of contact soil body sample failure by shear experiment, and tried in the follow-up several groups contact soil body
In the experiment of sample failure by shear, the setting value of loading force need to gradually increase, and the loading force setting value in the experiment of each group failure by shear
Difference it is equal, and record the shearing force numerical value in the experiment of every group of failure by shear；
Step 8：Shearing force during the contact soil body sample generation failure by shear obtained in the experiment of some groups of failures by shear and its
Loading force setting value under correspondence carries out fitting a straight line, and in the coordinate system of fitting a straight line, shearing force is ordinate, and loading force is
Abscissa, and the inclination angle of fitting a straight line is exactly interface friction angle of the retaining wall with contacting the soil body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710474310.0A CN107036914B (en) | 2017-06-21 | 2017-06-21 | Device and method for measuring friction angle of retaining wall and contact soil body interface |
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|---|---|---|---|
| CN201710474310.0A CN107036914B (en) | 2017-06-21 | 2017-06-21 | Device and method for measuring friction angle of retaining wall and contact soil body interface |
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| CN107036914B CN107036914B (en) | 2023-07-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567429A (en) * | 2019-09-25 | 2019-12-13 | 辽宁工程技术大学 | Device and method for measuring actual Poisson ratio of foundation soil body under lateral limit stress condition |
| CN110567870A (en) * | 2019-09-30 | 2019-12-13 | 辽宁工程技术大学 | Pile-soil interface friction visual test device and method |
| CN113504133A (en) * | 2019-07-19 | 2021-10-15 | 三峡大学 | Soil-rock interface undisturbed sample torsional shear test method |
| CN114441341A (en) * | 2022-01-24 | 2022-05-06 | 西南交通大学 | Soil shearing device for testing dynamic performance of tillite |
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| CN113504133A (en) * | 2019-07-19 | 2021-10-15 | 三峡大学 | Soil-rock interface undisturbed sample torsional shear test method |
| CN110567429A (en) * | 2019-09-25 | 2019-12-13 | 辽宁工程技术大学 | Device and method for measuring actual Poisson ratio of foundation soil body under lateral limit stress condition |
| CN110567870A (en) * | 2019-09-30 | 2019-12-13 | 辽宁工程技术大学 | Pile-soil interface friction visual test device and method |
| CN114441341A (en) * | 2022-01-24 | 2022-05-06 | 西南交通大学 | Soil shearing device for testing dynamic performance of tillite |
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