CN108035387A - Controllable confined pressure is used for the experimental provision for simulating closing pile installation process - Google Patents
Controllable confined pressure is used for the experimental provision for simulating closing pile installation process Download PDFInfo
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- CN108035387A CN108035387A CN201711457394.3A CN201711457394A CN108035387A CN 108035387 A CN108035387 A CN 108035387A CN 201711457394 A CN201711457394 A CN 201711457394A CN 108035387 A CN108035387 A CN 108035387A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
It is used for the experimental provision for simulating closing pile installation process, including rack, pressure indoor, pile body, limiting device, loading system, water confined pressure control system, sensing system, data collection and control system the invention discloses a kind of controllable confined pressure.Pile body used in the present apparatus can be assembled pile body, be spliced by stake piece, and feature is that the big displacement that stake can be simulated by assembling installs penetration process.Assembly pile body is located at pressure indoor center during experiment, is in close contact with pressure indoor upper cover, bottom plate and the internal soil body.It is in contact inside pile body with limiting device, limiting device is used to limit pile body rotation.Pile body can quiet by screw rod and Serve Motor Control, dynamic installation process.The present invention can squeeze into process by controlling confined pressure to simulate static(al) and power of the closing pile in the soil body of complex stress condition, can measure quiet, the dynamic resistance of side wall during pile body is squeezed into, at the same also can the unlimited displacement of simulation piles squeeze into the process of the soil body.
Description
Technical field
A kind of controllable confined pressure is used for the experimental provision for simulating closing pile installation process, available for simulation closing pile a variety of
Static(al) and power in the soil body (sand, clay, silt) squeeze into process, and are contemplated that the complex stress condition of soil, drainage condition
Etc. various working.
Background technology
In recent years, in order to meet requirement of the skyscraper to ground bearing capacity, pile foundation is designed more next
Longer, this construction and installation to stake proposes the requirement of higher.Construct for guarantee and that installs is smoothed out, it is necessary in installation
The preceding installation resistance to pile body is assessed, to select suitable installation equipment to provide guidance.
Have the experimental provision of many simulation prefabricated pile installation processes indoors at present, but due under normal gravity state
The stress state of the soil body differs greatly in the stress state and Practical Project of the soil body, therefore the normal Gravity Models done according to reduced scale
Experiment can not be in accurate simulation Practical Project between stake soil stressing conditions.Hypergravity centrifuge test can also be used at this stage
Soil mass state is reduced, but this experimentation cost is very high, experiment is complicated.
The present invention proposes that a kind of controllable confined pressure is used for the experimental provision for simulating closing pile installation process, can be enclosed by control
Pressing mold intends static(al) and power of the closing pile in the soil body of complex stress condition and squeezes into process, can measure side during pile body is squeezed into
Quiet, the dynamic resistance of wall, at the same also can the unlimited displacement of simulation piles squeeze into the process of the soil body.
The content of the invention
The present invention have devised the experimental provision that a kind of controllable confined pressure is used to simulate closing pile installation process.The device
Feature is：Static(al) and power of the closing pile in the soil body of complex stress condition can be simulated and squeeze into process, pile body can be measured and squeezed into
During side wall quiet, dynamic resistance；Since pile body can be assembled, can the unlimited displacement of simulation piles squeeze into the process of the soil body.
The present invention takes following technical scheme：
A kind of controllable confined pressure is used to simulating the experimental provision of closing pile installation process, including rack, pressure indoor, pile body,
Limiting device, loading system, water confined pressure control system, sensing system, data collection and control system；
In pile body insertion pressure indoor, with forming stake Soil Interface loaded on the indoor soil sample of confined pressure, soil can be controlled by pressure indoor
The stress state and drainage condition of body；Limiting device is used to limit pile body rotation, and its role is to ensure that pile body can be done without spin
Up and down motion, and reduce sidewall friction as far as possible.Loading system includes hydraulic system, worm screw and servomotor, hydraulic system
For applying vertical stress to the soil body, worm screw upper end is screwed in pile body, and lower end is connected with servomotor drives snail by servomotor
Bar completes quiet to pile body dynamic Loading Control, and water confined pressure control system is used to control the confined pressure of pressure indoor to adjust the stress shape of the soil body
State, sensing system are used for the testing data in detection device, and are transmitted in data collection and control system, data acquisition and
Control system is used to control loading system, hydraulic system and water confined pressure control system.Closing pile may be simulated by the device to exist
Static(al) and power in the soil body of complex stress condition squeeze into process.
In above-mentioned technical proposal, it is preferred that the pressure indoor includes cylindrical outer wall, pressure indoor bottom plate, cricoid confined pressure
Room upper cover, rubber membrane；Cylindrical outer wall is fixed on pressure indoor bottom plate, can use pmma material, is seen with facilitating from outside
Sample situation to be examined, cylindrical outer wall top open part is covered in pressure indoor, pile body is inserted into pressure indoor upper cover in the middle part of bottom plate,
Pass through rubber between pile body and pressure indoor upper cover, between pressure indoor upper cover and cylindrical outer wall, between pile body and pressure indoor bottom plate
Circle sealing, a rubber membrane retainer ring, rubber membrane upper and lower side point are respectively fixed with pressure indoor upper cover lower surface and plate upper surface
It is not fixed on by rubber ring in rubber membrane retainer ring, is used to the soil body to be measured, rubber membrane and cylinder are installed between rubber membrane and pile body
Confined pressure space is formed between shape outer wall；
The water confined pressure control system include be opened on the bottom plate of confined pressure space confined pressure water hole, be opened in soil body space to be measured
Back-pressure hole and hydraulic pressure force controller on bottom plate；Confined pressure water hole is connected by pipeline with hydraulic pressure force controller for empty to confined pressure
To control the hydraulic pressure in confined pressure space, back-pressure hole is connected by flowmeter with hydraulic pressure force controller for surveying for interior water filling or draining
The body for measuring the soil body under drainage condition becomes.
Preferably, the hydraulic system includes hydraulic loaded control device and passes through oil with hydraulic loaded control device
The oil cylinder of pipe connection；The piston rod of oil cylinder is connected by transmission rod and pressure indoor upper cover, and upper cover can be under the action of oil cylinder along axis
Line moves up and down, and can apply vertical pressure to the lower part soil body.
Preferably, using splicing pile body, including a section stake or end to end more piece stake, often save stake includes the pile body
Along the symmetrical stake piece of the two panels of longitudinal profile split, stake piece inner wall is provided with screw thread and for matched vertical recessed with limiting device
Groove, the stake inner wall after two panels stake piece split form the continuous thread that can be matched with worm screw, and often saving stake upper end has external screw thread, lower end
There is internal thread, for being connected with next section stake upper external screw thread.
It is furthermore preferred that the limiting device includes connecting rod, limiting plate, connecting rod is fixed in rack, on limiting plate
End is connected with connecting rod, in other end insertion pile body vertical groove.
It is furthermore preferred that the limiting plate side is embedded with ball to reduce the friction with vertical groove.
It is furthermore preferred that in order to reach the requirement of waterproof, (stake should be often saved in contact position when the split of two panels stake piece connects
Axial direction at seam) rubber waterproof strip is set.
Preferably, the sensor measuring system includes sensor for pore water pressure, displacement sensor, piezoelectric type axle power sensing
Device；Sensor for pore water pressure is used for the pore pressure response for measuring inside soil body, and displacement sensor, which is arranged on above pressure indoor upper cover, to be used to measure
The vertical displacement of the soil body, piezoelectric type axial force sensor are arranged on stake Soil Interface when pressure indoor bottom is used to measure pile body vertical motion
Mechanical response, torque sensor are used for the moment of torsion for measuring pile body, and axial force sensor and torque sensor are arranged on transmission shaft.
Preferably, the pressure indoor is arranged in rack, and pressure indoor bottom is supported by four columns, in each column
Piezoelectric type axial force sensor is respectively arranged with, for measuring stressing conditions when pile body moves up and down between stake soil.
Data collection and control system includes computer, program controlled software and data collecting instrument etc..Data collecting instrument connects
Connect each sensor and carry out data acquisition, program controlled software analyzes and processes data and referred to according to user setting issue
Order, for controlling loading system, hydraulic system, water confined pressure control system to realize different stress states.
The present invention has the following advantages：
1. the present invention can simulate difference and enclose by controlling the stress state of confined pressure and vertical pressure accurate simulation in-situ soil
Pressure closing pile squeezes into the response of pile Soil Interface.
2. the splicing pile body that the present apparatus proposes, can recycle, can simulate stake squeezing into the soil body under unlimited displacement
Journey.
3. the present apparatus can simulate static(al), a variety of piling operating modes of power by servomotor, experimental simulation result can be stake
Engineering design and construction installation provides guidance.
Brief description of the drawings
Fig. 1 is the structure diagram of an embodiment of the present invention；
Fig. 2 is pressure indoor enlarged drawing in Fig. 1；
Fig. 3 is pressure indoor horizon-slice map in Fig. 1；
Fig. 4 is that a piece three regards schematic diagram；
Fig. 5 is splicing pile body schematic diagram；
Fig. 6 is limiting plate schematic diagram；
Wherein, 1. bases, 2. hydraulic loaded control devices, 3. hydraulic pressure force controllers, 4. flowmeters, 5. columns, 6. water pipes,
7. sensor for pore water pressure, 8. pressure indoor bottom plates, 9. cylindrical outer walls, 10. rubber membranes, 11. pressure indoor upper covers, 12. displacement sensors,
13. displacement sensor bracket, 14. limiting plates, 15. transmission rods, 16. fixed beams, 17. connecting rods, 18. reaction beams, 19. oil pipes,
20. oil cylinder, 21. worm threads, 22. pile bodies, 23. worm screws, 24. servomotors, 25. rubber rings, 26, rubber ring retainer ring, 27.
Rubber waterproof strip, 28. limiting slots, 29. external screw threads, 30. internal threads, 31. balls or bearing, 32. piezoelectric type axial force sensors,
A 33. piece screw thread.
Embodiment
The experimental provision of the present invention includes rack, pressure indoor, pile body, limiting device, loading system, water confined pressure control system
System, sensing system, data collection and control system；Pile body 22 is inserted into pressure indoor, with being formed loaded on the indoor soil sample of confined pressure
Stake Soil Interface, limiting device are used to limit pile body rotation, and loading system includes hydraulic system, worm screw 23 and servomotor 24, liquid
Pressure system is used to apply vertical stress to the soil body, and 23 upper end of worm screw is screwed in pile body, and lower end is connected by servo with servomotor 24
Motor driving worm screw completes quiet to pile body dynamic Loading Control, and water confined pressure control system is used to control the confined pressure of pressure indoor to adjust soil
The stress state of body, sensing system is used for the testing data in detection device, and is transmitted in data collection and control system,
Data collection and control system is used to control loading system, hydraulic system and water confined pressure control system.
Specifically, as shown in figures 1 to 6, a kind of specific embodiment is as follows：
The rack includes engine base 1, column 5, reaction beam 18 etc..The pressure indoor includes cylindrical outer wall 9, pressure indoor
Bottom plate 8, cricoid pressure indoor upper cover 11, rubber membrane 10；Cylindrical outer wall 9 is fixed on pressure indoor bottom plate 8, is covered in pressure indoor
Cylindrical outer wall top open part, pile body 22 are inserted into pressure indoor upper cover 11 in the middle part of bottom plate, between pile body and pressure indoor upper cover,
Between pressure indoor upper cover and cylindrical outer wall, between pile body and pressure indoor bottom plate by seal with elastometic washer, under pressure indoor upper cover
Surface and plate upper surface are respectively fixed with the rubber membrane retainer ring 26 of a 2cm high, and 10 upper and lower side of rubber membrane passes through rubber respectively
Circle is fixed in rubber membrane retainer ring 26, is used to install the soil body to be measured between rubber membrane and pile body, rubber membrane and cylindrical outer wall it
Between form confined pressure space；Oil cylinder 20 is fixed at 18 center of reaction beam, the piston rod of oil cylinder 20 connects four transmission rods 15, transmission rod
15 are connected with pressure indoor upper cover 11 by screw, and upper cover 11 is annular.Splicing pile body 22 is located at pressure indoor center, with pressure indoor
Upper cover 11, bottom plate 8 and the internal soil body are in close contact.22 inside of splicing pile body connects with worm screw 21, and worm screw 21 is by servomotor 24
Control, servomotor 24 are fixed on base, can complete (such as motor slow rotation) quiet to pile body, dynamic (such as motor quick rotation)
Loading Control, thus the quiet dynamic installation process of stake can be simulated.
The pressure indoor for annular, outer wall 9 is pmma material, can from outside sample situation, pressure indoor bottom
Plate 8 is supported on transverse slat by four columns, and piezoelectric type axial force sensor 32 is equipped with column, is moved up and down for measuring pile body
When interface stressing conditions；Three holes are provided with bottom plate, the hole in outside is confined pressure water hole, for the water filling into pressure indoor or row
Water adjusts pressure；There are two holes in inner side at the soil body, and one is pore pressure measured hole 7, connection sensor for pore water pressure measurement internal holes
Pressure value；Another is back-pressure hole, and is connected by flowmeter 4 with hydraulic pressure force controller 3, for measuring the soil body under drainage condition
Body becomes.
Pile body 22 is assembled by the splicing of stake piece；The splicing of two panels stake piece becomes a section pile body；In stake piece (as shown in Figure 4)
Side has the stake piece screw thread 33 cut with together with parallel to the limiting groove 28 of axis direction, and single stake piece can regard a section stake piece as
Part after being cut along the symmetrical plane of axis, but in order to reach the requirement of waterproof, should be in contact position when two stake pieces connect
Seamed in putting and put rubber waterproof strip 27.Often saving stake upper end has an external screw thread 29, and there is internal thread 30 in lower end, and (or there is screw or convex in upside
Rise, there are nut or pit in downside), for some section stakes to be connected into longer pile body.
Limiting device is loaded in fixed beam 16, including connecting rod 17, limiting plate 14, ball or bearing 31 etc..Fixed beam 16
Positioned at 18 positive bottom of reaction beam, fixed connecting rod 17 on the downside of center, connecting rod 17 connects limiting plate 14, the side wall of limiting plate 14 and
Ball 31 (or bearing) is respectively arranged with face, to reduce vertical friction.The effect of limiting device is to ensure that pile body is done without spin
Move up and down, and reduce sidewall friction as far as possible.
Hydraulic system includes oil cylinder 20 and hydraulic loaded control device 2 etc..Oil cylinder 20 is fixed on 18 medium position of reaction beam,
The piston rod of oil cylinder is connected with transmission rod 15；The top of oil cylinder 20 is connected to hydraulic loaded control device 2 by oil pipe 19.
Hydraulic pressure Force control system includes water pipe 6, flowmeter 4 and hydraulic pressure force controller 3.The controllable soil of hydraulic pressure force controller 3
Confined pressure value suffered by body, can also Control Assay drainage condition and measure the soil body body become.
Various kinds of sensors includes LVDT displacement sensors 12 including sensor for pore water pressure 7, piezoelectric type axial force sensor 32.Position
Displacement sensor 12 is fixed on a column 5 by stent 13, and LVDT displacement sensors 12 are used for the vertical displacement for measuring the soil body；
Sensor for pore water pressure 7 is fixed in rack, for measuring the pore pressure response of inside soil body；Piezoelectric type axial force sensor 32 is used to measure
Pile body squeezes into the mechanical response of process median surface.
Data collection and control system includes computer, program controlled software and data collecting instrument etc..Data collecting instrument connects
Connect each sensor and carry out data acquisition, program controlled software analyzes and processes data and referred to according to user setting issue
Order, for controlling loading system, hydraulic system, water confined pressure control system to realize different stress states.
Had below to squeeze into the simulated experiment of long stake summary in sand using a kind of of the above embodiment of the present invention device
Body tests process：
1. the screw in pressure indoor on lid is backed out, transmission rod is lifted by hydraulic loaded control device, and by confined pressure
Room upper cover and confined pressure chamber outer wall take out.
2. by the side of the vertical spacing groove alignment limiting plate of stake piece, rubber waterproof strip is placed in stake piece junction, is spelled
Stake is passed through into pressure indoor after the completion of connecing, completes the installation of stake；
3. by Rubber membrane cover with specimen finish and highly identical casing in, aspirate the sky between rubber membrane and casing
Gas, makes rubber membrane be close to casing, and casing is installed in pressure indoor rubber membrane retainer ring and by rubber ring and is fixed；
4. weighing sand sample, peace loads sand sample according to the layering of predetermined compactness；
5. dress sample is installed to precalculated position, rubber membrane and pressure indoor upper cover are sealed up using rubber ring, casing is taken
Under, confined pressure chamber outer wall is installed to designated position, pressure indoor reaches sealing state at this time；
6. confined pressure value and vertical pressure value are set according to requirement of experiment；
7. open software sets simulation operating mode according to requirement of experiment, when a fully extended pressure indoor of section pile body is arranged at pile body lower part
When, pile body is dismantled, and spliced on pile body top, this process of repetition can simulate the process that the soil body is squeezed into long stake；
8. experiment is completed, confined pressure water is discharged, pressure indoor is removed, sample is taken out.
Claims (9)
1. a kind of controllable confined pressure is used for the experimental provision for simulating closing pile installation process, it is characterised in that：Including rack, confined pressure
Room, pile body, limiting device, loading system, water confined pressure control system, sensing system, data collection and control system；Pile body
(22) it is inserted into pressure indoor, with forming stake Soil Interface loaded on the indoor soil sample of confined pressure, limiting device is used to limit pile body rotation, adds
Loading system includes hydraulic system, worm screw (23) and servomotor (24), and hydraulic system is used to apply vertical stress, worm screw to the soil body
(23) upper end is screwed in pile body, and lower end is connected with servomotor (24) completes dynamic loading quiet to pile body by servomotor driving worm screw
Control, water confined pressure control system are used to control the confined pressure of pressure indoor to adjust the stress state of the soil body, and sensing system is used to examine
The testing data in device is surveyed, and is transmitted in data collection and control system, data collection and control system is used to control and adds
Loading system, hydraulic system and water confined pressure control system.
2. controllable confined pressure according to claim 1 is used for the experimental provision for simulating closing pile installation process, its feature exists
In：The pressure indoor includes cylindrical outer wall (9), pressure indoor bottom plate (8), cricoid pressure indoor upper cover (11), rubber membrane (10)；
Cylindrical outer wall (9) is fixed on pressure indoor bottom plate (8), and cylindrical outer wall top open part is covered in pressure indoor, and pile body (22) passes through
Wear in the middle part of bottom plate in insertion pressure indoor upper cover (11), between pile body and pressure indoor upper cover, between pressure indoor upper cover and cylindrical outer wall,
Between pile body and pressure indoor bottom plate one is respectively fixed with pressure indoor upper cover lower surface and plate upper surface by seal with elastometic washer
A rubber membrane retainer ring (26), rubber membrane (10) upper and lower side are fixed in rubber membrane retainer ring (26) by rubber ring respectively, rubber
It is used to the soil body to be measured be installed between glued membrane and pile body, confined pressure space is formed between rubber membrane and cylindrical outer wall；
The water confined pressure control system include be opened on the bottom plate of confined pressure space confined pressure water hole, be opened in soil body space to be measured bottom plate
On back-pressure hole and hydraulic pressure force controller (3)；Confined pressure water hole is connected by pipeline with hydraulic pressure force controller to be used for confined pressure space
To control the hydraulic pressure in confined pressure space, back-pressure hole is connected by flowmeter with hydraulic pressure force controller for measuring for interior water filling or draining
The body of the soil body becomes under drainage condition.
3. controllable confined pressure according to claim 2 is used for the experimental provision for simulating closing pile installation process, its feature exists
In：The hydraulic system includes hydraulic loaded control device (2) and the oil being connected with hydraulic loaded control device by oil pipe
Cylinder (20)；The piston rod of oil cylinder (20) is connected by transmission rod (15) and pressure indoor upper cover (11).
4. controllable confined pressure according to claim 1 is used for the experimental provision for simulating closing pile installation process, its feature exists
In：Using splicing pile body, including a section stake or end to end more piece stake, often save stake includes cuing open along longitudinal direction the pile body (22)
The symmetrical stake piece of two panels of face split, stake piece inner wall be provided with screw thread (33) and for the matched vertical groove of limiting device
(28), the stake inner wall after the split of two panels stake piece forms the continuous thread that can be matched with worm screw, and often saving stake upper end has external screw thread
(29), there is internal thread (30) in lower end, for being connected with next section stake upper external screw thread.
5. controllable confined pressure according to claim 4 is used for the experimental provision for simulating closing pile installation process, its feature exists
In：The limiting device includes connecting rod (17), limiting plate (14), and connecting rod (17) is fixed in rack, limiting plate (14)
Upper end is connected in connecting rod (17), in other end insertion pile body vertical groove (28).
6. controllable confined pressure according to claim 4 is used for the experimental provision for simulating closing pile installation process, its feature exists
In：Described limiting plate (14) side is embedded with ball or bearing (31) with reduction and the friction of vertical groove (28).
7. controllable confined pressure according to claim 4 is used for the experimental provision for simulating closing pile installation process, its feature exists
In：Rubber waterproof strip (27) is set in contact position when the two panels stake piece split connects.
8. controllable confined pressure according to claim 1 is used for the experimental provision for simulating closing pile installation process, its feature exists
In：The sensor measuring system includes sensor for pore water pressure (7), displacement sensor (12), piezoelectric type axial force sensor (32)；
Sensor for pore water pressure (7) is used for the pore pressure response for measuring inside soil body, and displacement sensor (12) is arranged on above pressure indoor upper cover (11)
For measuring the vertical displacement of the soil body, piezoelectric type axial force sensor (32) is arranged on pressure indoor bottom and is used to measure pile body vertical motion
When stake Soil Interface mechanical response, torque sensor (21) is used to measure the moment of torsion of pile body, axial force sensor and torque sensor
It is arranged on transmission shaft (18).
9. controllable confined pressure according to claim 8 is used for the experimental provision for simulating closing pile installation process, its feature exists
In：The pressure indoor is arranged in rack, and pressure indoor bottom is supported by four columns, and piezoelectric type is respectively arranged with each column
Axial force sensor (32).
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| CN201711457394.3A CN108035387B (en) | 2017-12-28 | 2017-12-28 | Experimental device capable of controlling confining pressure and used for simulating installation process of closed pile |
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| CN201711457394.3A CN108035387B (en) | 2017-12-28 | 2017-12-28 | Experimental device capable of controlling confining pressure and used for simulating installation process of closed pile |
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| CN108035387B CN108035387B (en) | 2023-03-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982265A (en) * | 2018-07-16 | 2018-12-11 | 浙江大学 | A kind of experimental provision of stake soil shear action observation and measurement based on PIV technology |
| CN109187204A (en) * | 2018-08-03 | 2019-01-11 | 广西大学 | A kind of experimental rig for simulating pile-soil interaction when vertically recycling load-bearing |
| CN109374418A (en) * | 2018-09-20 | 2019-02-22 | 浙江大学 | Equivalent Elasticity boundary Lower chains and native tangential and normal direction drag test device |
| CN110389060A (en) * | 2019-07-01 | 2019-10-29 | 浙江大学 | A kind of bamboo joint pile-cement soil contact face sample preparation device and contact surface frictional behavior research shearing test device and test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108982265A (en) * | 2018-07-16 | 2018-12-11 | 浙江大学 | A kind of experimental provision of stake soil shear action observation and measurement based on PIV technology |
| CN108982265B (en) * | 2018-07-16 | 2021-03-02 | 浙江大学 | Experimental device for pile soil shearing action is observed and is measured based on PIV technique |
| CN109187204A (en) * | 2018-08-03 | 2019-01-11 | 广西大学 | A kind of experimental rig for simulating pile-soil interaction when vertically recycling load-bearing |
| CN109187204B (en) * | 2018-08-03 | 2020-12-08 | 广西大学 | Test device for simulating pile-soil interaction during vertical cyclic loading |
| CN109374418A (en) * | 2018-09-20 | 2019-02-22 | 浙江大学 | Equivalent Elasticity boundary Lower chains and native tangential and normal direction drag test device |
| CN110389060A (en) * | 2019-07-01 | 2019-10-29 | 浙江大学 | A kind of bamboo joint pile-cement soil contact face sample preparation device and contact surface frictional behavior research shearing test device and test method |
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|---|---|
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