CN109187223A - Test the testing equipment and test method of Creep of Geosynthetics performance - Google Patents
Test the testing equipment and test method of Creep of Geosynthetics performance Download PDFInfo
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- CN109187223A CN109187223A CN201811390074.5A CN201811390074A CN109187223A CN 109187223 A CN109187223 A CN 109187223A CN 201811390074 A CN201811390074 A CN 201811390074A CN 109187223 A CN109187223 A CN 109187223A
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of testing equipments and test method for testing Creep of Geosynthetics performance, belong to geosynthetics the field of test technology, the testing equipment includes Main Control Tank, sample holding device, lever loading device and temperature control box, and sample holding device is capable of clamping multiple test battens in temperature control box；The front of lever loading device outside temperature control box is connected with sample holding device, tail portion is connected with load pallet；Temperature control box is set on pedestal, and multiple measuring cells are equipped in pedestal；Main Control Tank is electrically connected with temperature control box, measuring cell.The test method, which is clamped in temperature control box by will test batten, stands 12-24h at a temperature of experimental test, and to the load of test batten and grading, lifting temperature control the temperature inside the box, passes through transmission and processing that computer completes data.The deformation of creep that can be realized stepped isothermal method test geosynthetics using the present invention, shortens Creep of Geosynthetics test period, reduces energy consumption and experimentation cost, improves precision.
Description
Technical field
The invention belongs to geosynthetics the field of test technology more particularly to a kind of test Creep of Geosynthetics
The testing equipment and test method of energy.
Background technique
In earth structure, due to being influenced by reinforced structure object sedimentation and deformation, the geotechnique's synthesis being placed in the soil body
Material is in tensional state.The strain of geosynthetics can with the time increase and increase, this phenomenon we be referred to as
For creep.When Creep of Geosynthetics deform it is excessive, the stress inside earth structure can be made redistribute, may cause add
The deformation of muscle soil structure is excessive and unstability or can not continue to use.Therefore, the deformation of creep control of geosynthetics is being set
It counts in service life, it is most important to stable structure.The test method of test Creep of Geosynthetics characteristic is mainly wrapped at present
Include two kinds: one is Creep of Geosynthetics deformation test method is tested under normal conditions according to specification, another kind is base
Accelerate the time-dependent knowledge model test method of polymer creep in temperature.
Creep of Geosynthetics deformation test method is tested under normal condition, is by geosynthetics in constant quiet lotus
It is stretched under load, stretching time is determined by reinforced structure object service life.Since geosynthetics majority is viscoelasticity material
Material, physical property are strongly dependent upon the time, and when extrapolating long-term creep deformation, specification regulation does not allow to be performed for more than one
The extrapolation of the order of magnitude.Therefore, if reinforced structure object service life is 50 ~ 100 years, need to test reinforcement material in constant quiet lotus
The lower deformation of creep for stretching 5 ~ 10 years is carried, even if reinforced structure object service life is 10 years, it is also desirable to test 10000h.Obviously,
Creep of Geosynthetics deformation test is tested under normal condition, time-consuming, and energy consumption is high, and test requirements document is higher, once in test
Between occur to have a power failure or other emergency cases, just can not be tested, not with existing quick developing material and application plan
It is compatible.
Time-dependent knowledge model is to increase temperature to can speed up polymer material creep, this test method is by multiple groups reinforcement material
Sample is placed under different temperatures environment, carries out the short-term tensile test under constant static load, then passes through mobile not equality of temperature
Test deformation of creep curve under degree constructs the creep principal curve under fiducial temperature.With the creep test phase under normal condition
Than the creep test time can be greatly reduced in time-dependent knowledge model, shorten the test period.But time-dependent knowledge model test is compacted
Deformation needs multiple groups sample, if at each temperature being one group, one group at least needs three samples, can thus cause biggish
Measurement error, longer duration of test runs and higher cost.
Therefore, it is necessary to research and develop a kind of device and method of Quick Measurement of Soil geosynthetics creep properties to solve following technology
Problem:
1, existing Creep of Geosynthetics duration of test runs is long, energy consumption and problem at high cost, with existing quick material
Exploitation and application plan incompatibility problem.
2, more using sample when time-dependent knowledge model and routine test method, larger measurement error caused by time of measuring length.
3, existing testing equipment precision is low, is unable to satisfy temperature control loading environment of the test of stepped isothermal method etc. and asks
Topic.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of testing equipments for testing Creep of Geosynthetics performance
And test method, it is capable of the croop property of Quick Measurement of Soil geosynthetics, geotechnique's synthesis under different temperatures can also be tested
Material creep characteristic, simple to operate, at low cost, testing efficiency is high, and measuring accuracy is high.
In order to solve the above technical problems, the technical solution used in the present invention is:
A kind of testing equipment for testing Creep of Geosynthetics performance, including Main Control Tank, sample holding device, lever-loading dress
It sets and the temperature control box for controlling geosynthetics test batten temperature, the sample holding device can clamp multiple tests
Batten is simultaneously set in temperature control box, and the lever loading device is set to the outside of temperature control box, before the lever loading device
Portion is connected with sample holding device, tail portion is connected with the load pallet for loading to test batten；The temperature control box is set to
On pedestal, equipped with multiple for detecting the measuring cell of test batten croop property in the pedestal；The Main Control Tank and temperature control
Case, measuring cell electrical connection.
Preferably, the lever loading device includes support frame and multiple levers being set side by side, and the lever is across
The top of temperature control box, the lever are set on support frame, and support frame as described above is set to the outside of temperature control box；The sample holder
Device and the quantity for loading pallet are corresponding with the quantity of lever, the front of the lever and corresponding sample holding device phase
Even, tail portion is connected with corresponding load pallet.
Preferably, the sample holding device is three groups, and the quantity of the load pallet and lever is three；The branch
Support includes the pillar of crossbeam and its two sides, and the beam vertical is rotatablely connected with crossbeam in lever, three levers.
Preferably, the sample holding device includes the upper fixture for clamp assay batten upper and lower side and lower fixture, institute
It states upper fixture to be connected by connecting rod with lever, the lower fixture is connected with slide bar, and the lower end of the slide bar is set in pedestal, institute
Slide bar is stated to be connected with the measuring cell in pedestal.
Preferably, it is equipped with the heater for heating up to temperature control box between the pedestal and temperature control box and is used for temperature control box
The refrigeration machine of cooling；The temperature control box includes chamber door and hollow shell, and the inner walls are equipped with thermal insulation layer, on the chamber door
Equipped with observation window, the observation window is corresponding with the test batten in temperature control box；The temperature control box rear portion is equipped with monitoring temperature cabinet,
The side of the monitoring temperature cabinet is equipped with temperature control panel, and the heater and refrigeration machine are electrically connected with monitoring temperature cabinet；
The monitoring temperature cabinet is electrically connected with Main Control Tank.
Preferably, multiple measuring cells are respectively temperature sensor, changing sensor and electronics extensometer；The temperature passes
Sensor, changing sensor and electronics extensometer are electrically connected with Main Control Tank.
Further, the thermal insulation layer filled polyurethane foamed plastic, the temperature control box is interior to be equipped with lighting installation.
The present invention also provides a kind of test methods for testing Creep of Geosynthetics performance, close using above-mentioned test geotechnique
At the testing equipment of material croop property, the test of croop property is carried out to the test batten of geosynthetics, including following
Step:
Test batten is clamped at a temperature of the experimental test in temperature control box using sample holding device and stands 12- by the first stage
For 24 hours, steps are as follows:
A, test batten is clamped between upper fixture and lower fixture, closes temperature control by the test batten for cutting geosynthetics
The chamber door of case；
B, start-up temperature monitoring cabinet controls temperature control the temperature inside the box to required temperature is tested, and stands test batten at such a temperature
24 hours；
Second stage, to the load of test batten and grading, lifting temperature control the temperature inside the box:
C, test parameters is set on the panel of main control box, and test parameters includes load, test period, initial tension and temperature
Degree, load needed for placing testing program on load pallet；
D, start button is pressed on the panel of main control box, the lever of lever loading device is with the crossbeam at the top of temperature control box
Fulcrum, counterweight are put on load pallet, apply pulling force to batten by the upper fixture of lever front, under the lower end of batten is clamped in
On fixture, lower fixture is mobile, and upper fixture starts to be loaded by lever, after reaching load needed for testing program, records data；
E, classification increases the temperature of temperature control box, and test batten stretching time is identical at a temperature of every grade, and every grade of promotion temperature temperature
Difference is equal, the record test batten elongation amount of changing with time；
F, after the completion of test, conclusion button is pressed on the panel of main control box, lever loading device stops load, opens sample
Clamping device removes test batten.
G, the test data on Main Control Tank is delivered to computer, completes the transmission and processing of data.
Preferably, in the step D of second stage, not less than two per second readings of minimum-rate of data record.
Preferably, in the first stage in the step E of step B and second stage, temperature control the temperature inside the box mentions in two minutes
15 °C are risen, temperature error range is within ± 1 °C in temperature control box；Every grade of temperature difference for polyester geosynthetics test batten
14 °C are not to be exceeded, every grade of temperature difference of polyolefin geosynthetics is not to be exceeded 7 °C.
Preferably, in the step E of second stage, every grade of temperature isothermal holding time is no less than 10000 seconds, test sample
Before fracturing, testing must not be less than 60000 seconds total time of the batten in temperature control box item.
It is tested the beneficial effects of adopting the technical scheme are that can be realized stepped isothermal method using the present invention
The deformation of creep of geosynthetics, specifically has the beneficial effect that:
1, shorten Creep of Geosynthetics test period, energy consumption is greatly lowered, effectively reduces experimentation cost, and it is existing
Quick developing material is mutually compatible with application plan.
2, the measurement error generated due to repeatedly testing multiple samples is eliminated, tests geosynthetics more accurately
The deformation of creep.
3, it is able to carry out continuous warming or cooling, is realized with classification isothermal test Creep of Geosynthetics deformation,
Test period is short, high-efficient, and low energy consumption.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is that a kind of structure of testing equipment for testing Creep of Geosynthetics performance provided in an embodiment of the present invention is shown
It is intended to；
Fig. 2 is the right view of Fig. 1；
In figure: 1, main control box；2, chamber door；3, lever loading device；31, support frame；32, lever；33, crossbeam；34, pillar；
4, upper fixture；5, watch window；6, pedestal；7, temperature control panel；8, pallet is loaded；9, lower fixture；10, temperature control box；11, even
Bar；12, monitoring temperature cabinet.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of testing equipment of test Creep of Geosynthetics performance as shown in Figure 1, 2, including Main Control Tank 1, sample
Clamping device, lever loading device 3 and the temperature control box 10 for controlling geosynthetics test batten temperature, the specimen holder
Multiple test battens can be clamped and be set in temperature control box 10 by holding device, and the lever loading device 3 is set to temperature control box 10
Outside, the front of the lever loading device 3 is connected with sample holding device, tail portion with for adding to test batten load
Pallet 8 is carried to be connected；The temperature control box 10 is set on pedestal 6, is equipped in the pedestal 6 multiple for detecting test batten creep
The measuring cell of performance respectively shows the temperature sensor of temperature control the temperature inside the box, for measuring test batten croop property
Changing sensor and electronics extensometer etc.；The Main Control Tank 1 is electrically connected with temperature control box 10, measuring cell.
As a preferred embodiment, the lever loading device 3 includes support frame 31 and multiple levers 32 being set side by side,
The lever 32 is across the top of temperature control box 10, and the lever 32 is set on support frame 31, and support frame as described above 31 is set to
The outside of temperature control box 10；The sample holding device and the quantity for loading pallet 8 are corresponding with the quantity of lever 32, the lever
32 front and corresponding sample holding device are connected, tail portion is connected with corresponding load pallet 8, and the load pallet 8 passes through
Connector is connected with the tail portion of lever, places counterweight on the load pallet 8.Lever using and support frame crosspoint as fulcrum, lead to
It crosses and places counterweight on load pallet, realize the load to test batten.Wherein, lever is three, and three levers are and crossbeam
Rotation connection.
In order to facilitate support lever, support frame as described above 31 includes the pillar 34 of crossbeam 33 and its two sides, and the crossbeam 33 hangs down
Directly it is rotatablely connected in lever 32 and with lever 32；The pillar is six, and six three groups of pillars point are set side by side, the two of middle part
A post top portion is connected by crossbeam, two pillars of two pillars of front close to middle part, the pillar of front two and rear portion two
A post top portion is equipped with floor stringer, and auxiliary depth of beam is lower than the height of middle beam, avoids tilting amplitude mistake before and after lever
Greatly.
As shown in Figure 1, 2, the sample holding device includes the upper fixture 4 for clamp assay batten upper and lower side and lower folder
Tool 9, the upper fixture 4 are connected by connecting rod 11 with lever 32, and the lower fixture 9 is connected with slide bar, and the lower end of the slide bar is set
It is placed in pedestal 6, the slide bar is connected with the measuring cell in pedestal 6.Wherein, upper fixture 4 is identical with the structure of lower fixture 9,
It include upper clamp plate and lower clamp plate, upper clamp plate and lower clamp plate are fixed on screw, and on the opposite face of upper clamp plate and lower clamp plate
Equipped with concave-convex embedded structure, the end for testing batten is built in groove, is fastened using screw, to grip test
Batten.The slide bar of lower fixture lower end is connected with mobile mechanism, and mobile mechanism is driven by motor, and moves in pedestal by motor,
Facilitate the position for adjusting lower fixture, guarantee test batten is in plumbness.
In one particular embodiment of the present invention, it is equipped between the pedestal 6 and temperature control box 10 for temperature control box liter
Warm heater and the refrigeration machine for cooling down to temperature control box, heat up to temperature control box by heater；Refrigerant will be connected with
Coil pipe be equipped with below temperature control box, cooled down by refrigeration machine to temperature control box.It is supervised equipped with temperature at 10 rear portion of temperature control box
Control cabinet 12, the side of the monitoring temperature cabinet 12 is equipped with temperature control panel 7, and the heater and refrigeration machine are and monitoring temperature
Cabinet 12 is electrically connected, for controlling and showing temperature control the temperature inside the box；The monitoring temperature cabinet 12 is electrically connected with Main Control Tank 1.
The temperature control box 10 includes chamber door 2 and hollow shell, and chamber door and shell are all made of cold-rolled steel sheet and are made；Institute
It states inner walls and is equipped with thermal insulation layer, filled polyurethane foamed plastic in thermal insulation layer avoids temperature control box inner air and outer air from carrying out heat exchange；
Observation window 5 there are three setting on the chamber door 2, the observation window 5 is corresponding with the test batten in temperature control box 10, while in temperature control
Headlamp is installed in case, facilitates test situation in observation temperature control box.
The present invention also provides a kind of test methods for testing Creep of Geosynthetics performance, close using above-mentioned test geotechnique
At the testing equipment of material croop property, the test of croop property is carried out to the test batten of geosynthetics, including following
Step:
First stage stands at a temperature of testing the experimental test that batten is clamped in temperature control box 10 using sample holding device
12-24h, preferably for 24 hours, the specific steps are as follows:
A, the test batten that geosynthetics is cut by test specification requirement adjusts upside fixture 4 under by main control box 1
Fixture 9 spacing in side meets test batten length, and test batten is clamped between upper fixture and lower fixture, temperature control box 10 is closed
Chamber door 2.
B, start-up temperature monitoring cabinet 12, setting test required temperature, reaches in 10 temperature of temperature control box on temperature control panel 7
When to required temperature, makes to test batten and stand 24 hours at such a temperature.
Second stage, to the load of test batten and grading, lifting temperature control the temperature inside the box:
C, test parameters is set on the panel of Main Control Tank 1, and test parameters includes load, test period, initial tension and temperature
Equal numerical value, load counterweight quantity needed for then placing testing program on load pallet.
D, press start button on the panel of Main Control Tank 1, the lever of lever loading device with the cross at the top of temperature control box
Beam is fulcrum, and counterweight is put on load pallet, applies pulling force, the lower end clamping of batten to batten by the upper fixture of lever front
On lower fixture, lower fixture is mobile, and upper fixture starts to be loaded by lever, after reaching load needed for testing program, starts
Record data；Data acquisition and record time and not less than the two per second readings of minimum-rate for testing batten elongation rate data,
It tests batten load to generate by counterweight self weight in lever loading device, does not need periodic measurement payload values.
E, classification increases the temperature of temperature control box 10, and record test batten elongation changes with time data；Every grade of temperature
Lower test batten stretching time is identical, and every grade of promotion temperature-difference is equal；Every grade of isothermal holding time is no less than 10000
Second, before fracturing, testing must not be less than 60000 seconds total time of the batten in temperature control box for test.
F, after the completion of test, conclusion button is pressed on the panel of main control box 1, lever loading device stops load, beats
It opens sample holding device and lower fixture is dropped into test front position, remove test batten.
G, by the USB data line interface and computer link in data on Main Control Tank 1 and output device, for convenience may be used
Using laptop, test data is transmitted to laptop, or test data is directly passed through to the printer worn
Printout, completes the transmission and processing of data.
H, power supply is closed, 10 inner wall of temperature control box, checking experiment equipment are wiped.
Note: in step B and step E, monitoring temperature cabinet 12, which can be realized, promotes 15 °C of temperature, in temperature control box in two minutes
Temperature error range is within ± 1 °C；Every grade of temperature difference for polyester geosynthetics is not to be exceeded 14 °C, polyolefin geotechnique
Every grade of temperature difference of synthetic material is not to be exceeded 7 °C.
Many details are elaborated in the above description to facilitate a thorough understanding of the present invention, still the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by particular embodiments disclosed above.
Claims (10)
1. a kind of testing equipment for testing Creep of Geosynthetics performance, it is characterised in that: filled including Main Control Tank, sample holder
Set, lever loading device and for control geosynthetics test batten temperature temperature control box, the sample holding device energy
It enough clamps multiple test battens and is set in temperature control box, the lever loading device is set to the outside of temperature control box, the thick stick
The front of bar loading device is connected with sample holding device, tail portion is connected with the load pallet for loading to test batten；Institute
It states temperature control box to be set on pedestal, equipped with multiple for detecting the measuring cell of test batten croop property in the pedestal；Institute
Main Control Tank is stated to be electrically connected with temperature control box, measuring cell.
2. the testing equipment of test Creep of Geosynthetics performance according to claim 1, it is characterised in that: the thick stick
Bar loading device includes support frame and multiple levers being set side by side, and the lever is across the top of temperature control box, the lever
It is set on support frame, support frame as described above is set to the outside of temperature control box；The quantity of the sample holding device and load pallet
Corresponding with the quantity of lever, the front of the lever and corresponding sample holding device are connected, tail portion is held in the palm with corresponding load
Disk is connected.
3. the testing equipment of test Creep of Geosynthetics performance according to claim 2, it is characterised in that: the examination
Sample clamping device is three groups, and the quantity of the load pallet and lever is three；Support frame as described above includes crossbeam and its two sides
Pillar, in lever, three levers are rotatablely connected with crossbeam the beam vertical.
4. the testing equipment of test Creep of Geosynthetics performance according to claim 3, it is characterised in that: the examination
Sample clamping device includes the upper fixture and lower fixture for clamp assay batten upper and lower side, and the upper fixture passes through connecting rod and lever
It is connected, the lower fixture is connected with slide bar, and the lower end of the slide bar is set in pedestal, the measurement member in the slide bar and pedestal
Part is connected.
5. the testing equipment of test Creep of Geosynthetics performance according to claim 4, it is characterised in that: the bottom
The heater for heating up to temperature control box and the refrigeration machine for cooling down to temperature control box are equipped between seat and temperature control box；The temperature control
Case includes chamber door and hollow shell, and the inner walls are equipped with thermal insulation layer, and the chamber door is equipped with observation window, the observation window
It is corresponding with the test batten in temperature control box；The temperature control box rear portion is equipped with monitoring temperature cabinet, the side of the monitoring temperature cabinet
Equipped with temperature control panel, the heater and refrigeration machine are electrically connected with monitoring temperature cabinet；The monitoring temperature cabinet and master control
Case electrical connection.
6. the testing equipment of test Creep of Geosynthetics performance according to claim 5, it is characterised in that: multiple surveys
Measuring element is respectively temperature sensor, changing sensor and electronics extensometer；The temperature sensor, changing sensor and electronics
Extensometer is electrically connected with Main Control Tank.
7. a kind of test method for testing Creep of Geosynthetics performance, which is characterized in that application is as claimed in claim 6
The testing equipment for testing Creep of Geosynthetics performance carries out the survey of croop property to the test batten of geosynthetics
Examination, comprising the following steps:
Test batten is clamped at a temperature of the experimental test in temperature control box using sample holding device and stands 12- by the first stage
For 24 hours, steps are as follows:
A, test batten is clamped between upper fixture and lower fixture, closes temperature control by the test batten for cutting geosynthetics
The chamber door of case；
B, start-up temperature monitoring cabinet controls temperature control the temperature inside the box to required temperature is tested, and stands test batten at such a temperature
24 hours；
Second stage, to the load of test batten and grading, lifting temperature control the temperature inside the box:
C, test parameters is set on the panel of main control box, and test parameters includes load, test period, initial tension and temperature
Degree, load needed for placing testing program on load pallet；
D, start button is pressed on the panel of main control box, the lever of lever loading device is with the crossbeam at the top of temperature control box
Fulcrum, counterweight are put on load pallet, apply pulling force to batten by the upper fixture of lever front, under the lower end of batten is clamped in
On fixture, lower fixture is mobile, and upper fixture starts to be loaded by lever, after reaching load needed for testing program, records data；
E, classification increases the temperature of temperature control box, and test batten stretching time is identical at a temperature of every grade, and every grade of promotion temperature temperature
Difference is equal, the record test batten elongation amount of changing with time；
F, after the completion of test, conclusion button is pressed on the panel of main control box, lever loading device stops load, opens sample
Clamping device removes test batten；
G, the test data on Main Control Tank is delivered to computer, completes the transmission and processing of data.
8. the test method of test Creep of Geosynthetics performance according to claim 7, it is characterised in that: second
In the step D in stage, not less than two per second readings of minimum-rate of data record.
9. the test method of test Creep of Geosynthetics performance according to claim 7, it is characterised in that: first
In the step B in stage and the step E of second stage, temperature control the temperature inside the box promotes 15 °C in two minutes, and temperature control the temperature inside the box misses
Poor range is within ± 1 °C；Every grade of temperature difference for polyester geosynthetics test batten is not to be exceeded 14 °C, polyolefin soil
Every grade of temperature difference of geosynthetics is not to be exceeded 7 °C.
10. the test method of test Creep of Geosynthetics performance according to claim 9, it is characterised in that: the
In the step E of two-stage, every grade of temperature isothermal holding time is no less than 10000 seconds, and test batten before fracturing, tests batten
Total time in temperature control box must not be less than 60000 seconds.
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| CN111551697A (en) * | 2020-05-27 | 2020-08-18 | 上海应用技术大学 | Method for rapidly evaluating long-term stability of ball-point pen ink composition containing thickening system |
| CN111521493A (en) * | 2020-06-10 | 2020-08-11 | 太原理工大学 | High-temperature triaxial rock creep testing machine capable of simultaneously loading in multiple stages and using method |
| CN112485116A (en) * | 2020-11-24 | 2021-03-12 | 国网北京市电力公司 | Device and method for testing buffer performance of buffer layer of high-voltage cable |
| CN112697604A (en) * | 2020-12-03 | 2021-04-23 | 国网北京市电力公司 | Device and method for detecting buffer performance of cable buffer layer |
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| CN113552000A (en) * | 2021-07-27 | 2021-10-26 | 河北工业大学 | Geosynthetic material test device and method based on temperature-load coupling effect |
| CN114166884A (en) * | 2021-11-26 | 2022-03-11 | 中国航发北京航科发动机控制系统科技有限公司 | Thermal deformation performance testing system for aviation temperature sensitive element |
| CN114894606A (en) * | 2022-05-23 | 2022-08-12 | 湖北工业大学 | Device and method for testing creep property of geosynthetic material |
| CN114894606B (en) * | 2022-05-23 | 2024-05-14 | 湖北工业大学 | Device and method for testing creep property of geosynthetic material |
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Application publication date: 20190111 |