CN108362728A - A kind of cold area's Modified soil three-dimensional swell-shrink deformation indoor test system - Google Patents
A kind of cold area's Modified soil three-dimensional swell-shrink deformation indoor test system Download PDFInfo
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- CN108362728A CN108362728A CN201810055712.1A CN201810055712A CN108362728A CN 108362728 A CN108362728 A CN 108362728A CN 201810055712 A CN201810055712 A CN 201810055712A CN 108362728 A CN108362728 A CN 108362728A
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 title claims abstract description 22
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 238000012937 correction Methods 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 6
- 230000008602 contraction Effects 0.000 claims description 13
- 238000010257 thawing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 5
- 239000011888 foil Substances 0.000 claims description 4
- 229910001374 Invar Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
- 206010044565 Tremor Diseases 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/16—Investigating or analyzing materials by the use of thermal means by investigating thermal coefficient of expansion
Abstract
The present invention relates to a kind of cold area's Modified soil three-dimensional swell-shrinks to deform indoor test system, it is characterised in that：The outer ledge of pedestal bottom plate, it is respectively provided with front side level(l)ing bubble and side level(l)ing bubble, it is equipped with four correction socles for making pedestal bottom plate be in horizontality below pedestal bottom plate, pedestal bottom plate can be made to be in horizontality by adjusting four correction socles under pedestal bottom plate；Two sliding rails of pedestal bottom plate center arranged beneath, the form being misplaced using right-angled intersection are corresponding respectively to be weldingly fixed on the middle part benchmark column of peripheral frame；Four side pasting boards for measuring deformation are corresponding two-by-two, it is connected respectively with two sliding rails of right-angled intersection by sliding block with fixing bracket, is connected as the entirety that can not be split, wherein side pasting board is grid construction；The present invention can carry out the analogue measurement that three-dimensional swell-shrink deforms under temperature change to the frozen embankment soil body, test good integrity, easy to operate, applied widely, can be according to adjustment such as soil body type, moisture content and compactness.
Description
Technical field
The present invention relates to a kind of During Geotechnical Tests system, it is specially adapted for surveying in frozen embankment Modified soil three-dimensional frozen-heave factor room
Examination.
Background technology
The a large amount of line projects such as high-grade highway and railway inevitably pass through frozen ground regions and round the clock temperature
The larger area of difference, adheres to the principle of " gathering materials on the spot ", needs to be modified processing to some rock-soil materials, be filled out for embankment
It builds, such as processing is modified to drift-sand addition cement material, but the embankment engineering Jing Guo this modification, in freeze thawing
Swell-shrinking deformation can occur in the process, many harmful engineering ground problems such as crack and thaw collapse occur, brought to cold regions engineering many
Hidden danger.Therefore, outdoor environment is simulated, the test of the three-dimensional swell-shrink deformation under freeze thawing state is carried out to area's Modified soil of trembling with fear to seem particularly
It is important.Currently, focusing primarily upon a peacekeeping two-dimensional device for the measurement of swell-shrinking deformation in soil body room, that is, assume that sample is plane
Shape and ignore the influence that sample sheet is brought as stereo structure, such as patent CN203755286U, which is only capable of measuring Vertical Square
To frost heave variation, measure it is single, data are not complete enough；For another example patent CN202057647U, although the patent will measure and system
Cold integration, but temperature is not easy to control, and it is limited only to negative temperature, and environmental protection concept is not met using freon refrigeration.And it trembles with fear
Area's soil body especially frozen embankment filling body, is not just influenced by one-dimensional or two-dimension temperature variation, mostly in three-dimensional temperature
It spends in environment, freeze thawing deflection is three-dimensional state.Patent of the present invention provides a kind of cold area's soil body three-dimensional swell-shrink deformation of measurement
Laboratory testing rig, solve the problems, such as that soil body three-dimensional frozen-heave factor can not be measured under current indoor design condition, it is high-grade for cold area
Line project construction provides important scientific basis.
Invention content
In order to measure the deformation of the three-dimensional swell-shrink under cold area's soil body freeze thawing state, present invention offer is a kind of to measure area's soil body three of trembling with fear
Tie up the laboratory testing rig of swell-shrinking deformation, the three-dimensional swell-shrink rate of the effectively measuring indoor soil body of device energy.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of cold area's Modified soil three-dimensional swell-shrink deformation indoor test system, it is characterised in that：
The outer ledge of pedestal bottom plate is respectively provided with front side level(l)ing bubble and side level(l)ing bubble, is set below pedestal bottom plate
There are four correction socles for making pedestal bottom plate be in horizontality,
Pedestal bottom plate can be made to be in horizontality by adjusting four correction socles under pedestal bottom plate；
Two sliding rails of pedestal bottom plate center arranged beneath, the form being misplaced using right-angled intersection, respectively corresponding weldering
It connects on the middle part benchmark column for being fixed on peripheral frame；
Four side pasting boards for measuring deformation are corresponding two-by-two, pass through sliding block and right-angled intersection with fixing bracket respectively
Two sliding rails are connected, and are connected as the entirety that can not be split, and wherein side pasting board is grid construction；
Before test, first two side pasting boards and upper sliding rail rack (5) are rigidly connected, and this part is made to pass through upper sliding rail
Sliding block (7) is slidably connected with upper sliding rail (9), between upper sliding rail spring (11) is installed on two upper sliding-rail slidings (7), in sample
(22) indicate that each three groups of planes of symmetry wait for that foil gauge is viscous in front and back symmetrical two sides center stickup foil gauge up and down, around on
After knot is secured, sample (22) is placed on pedestal bottom plate (15), it is ensured that side pasting board (20) and sample (22) left and right two sides are abundant
Contact, and 20 reciprocal average accumulateds measured in 2 minutes strain≤50 μ ε, the elastic coefficient and connection write down at this time are grown
Degree；Similarly, other two side patch version and glidepath holder (6) are rigidly connected, by this part by glidepath sliding block (8) with
Glidepath (10) is slidably connected, between glidepath spring (12) is installed on two glidepath sliding blocks (8), this glidepath spring
(12) coefficient of elasticity and connection length is consistent with upper sliding rail spring (11).
Further, pasting board material in side is the larger aluminium sheet of thermal coefficient, meanwhile, the pasting board periphery length of side is less than sample side
Long, bottom plate side is more than the test specimen length of side, and baseboard material is the smaller invar of thermal coefficient.
When the temperature decreases, sample occurs to freeze contracting, and side pasting board is closely bonded with sample by elastic restoring force, surveys
Determine contraction distortion；When temperature increases, sample expands；
Standard sample (22) is positioned over pedestal bottom plate (15) center, makes four side pasting boards and its exact contact, by four
The contact zone of side pasting board is close in a side sensor telescopic head one end, and the tail end of side sensor is fixed on peripheral frame
On middle part benchmark column (18), top pasting board (19) is placed, connecing for top pasting board (19) is close in upper sensor telescopic head one end
Area is touched, upper sensor tail end is fixed on peripheral frame upper cover (16) center, places peripheral frame upper cover, by adjusting five tails
End fixing end makes five sensor telescopic heads be compressed at the half of its length, can effectively be recorded when ensuring expansion and contraction
It is deformed；
Three-dimensional test device is put into freezing-thawing case, when the temperature increases, sample expands deformation, causes side
Pasting board slides on upper and lower slide rail, at this point, the horizontal displacement that side sensor is small by measuring pasting board, to measure sample level
The dilatancy of both direction, and top pasting board can generate vertical displacement under the action of expansive force, to measure sample in vertical
The dilatancy in direction；When the temperature decreases, sample shrinks deformation, by the horizontal resiliency restoring force of spring between sliding block,
Side pasting board and sample are in close contact, and sensor is by measuring the contraction horizontal displacement of pasting board, to measure two sides of sample level
To contraction distortion, and top pasting board can measure contraction distortion of the sample in vertical direction under gravity to bottom offset.
The beneficial effects of the invention are as follows：
Can the analogue measurement that three-dimensional swell-shrink deforms under temperature change be carried out to the frozen embankment soil body indoors, test is whole
Property it is good, it is easy to operate, it is applied widely, can be carried out according to the different types test specimen such as soil body type, moisture content and compactness double
It adjusts, carries out under different Frozen-thawed cycled effects, breathing becomes under different freeze thawing temperature actions and under different freeze thawing rates to elastic force
The continuous acquisition of graphic data, precision is high, and it is good to can perform rate.Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples：
Fig. 1 is the structural schematic diagram of the present invention
Fig. 2 is the front view of the present invention
Fig. 3 is the side view of the present invention
Fig. 4 is the vertical view of the present invention
Fig. 5 is the pedestal bottom plate of the present invention
Fig. 6 is the test device of the present invention
Fig. 7 is the sectional view of the present invention
Structure explanation：
1. upper sensor in figure, 2. side sensors, 3. upper sensor fixing ends, 4. side sensor fixing ends,
5. sliding rail rack on, 6. glidepath holders, 8. glidepath sliding block of sliding-rail sliding on 7., sliding rail on 9., 10. glidepaths are sliding on 11
Rail spring, 12. glidepath springs, 13. front side level(l)ing bubble, 14. side level(l)ing bubble, 15. pedestal bottom plates, in 16. peripheral frames
Lid, 17. peripheral frames, 18. middle part benchmark columns, 19. top pasting boards, 20. side pasting boards, 21. correction socles, 22. samples
Specific implementation mode：
The outer ledge of pedestal bottom plate is respectively provided with front side level(l)ing bubble and side level(l)ing bubble, can be by adjusting pedestal
Four correction socles under bottom plate, make pedestal bottom plate be in horizontality；To ensure that device measures lateral double-deformation, base simultaneously
Seat bottom plate center two sliding rails of arranged beneath, the form being misplaced using right-angled intersection are corresponding respectively to be welded and fixed outside
On the middle part benchmark column of peripheral frame frame；Four side pasting boards for measuring deformation are corresponding two-by-two, pass through cunning with fixing bracket respectively
Block is connected with smooth upper and lower slide rail, is connected as the entirety that can not be split, and wherein side pasting board is mainly characterized by grid construction, material
Material is the higher aluminium sheet of thermal coefficient, and grid width is 20mm, and thickness 2mm both may insure the change of sample and pasting board in this way
Shape is coordinated, and can guarantee that temperature is preferably transmitted, simultaneously as upper and lower two sliding rails test the change of both direction respectively
Shape cannot influence each other, and the pasting board periphery length of side=(the sample length of side -20mm), sample is not hanging when to ensure dilatancy, bottom plate
The length of side=(the test specimen length of side+10mm), the heat-transfer environment of simulation embankment soil body downside relative closure, base plate thickness 20mm, material
For the smaller invar of thermal coefficient；Between two sliding blocks in smooth guide, the smaller spring of installation coefficient of elasticity, the spring
It is characterized in that：When installing sample, spring is in tensional state, with the presence of certain pulling force between two sliding blocks, it is ensured that pasting board
It is come into full contact with sample, but sample cannot generate excessive strain, that is, when testing, or not two-way pasting board squeezes force effect
Arrange that transverse strain piece (BX120-60AA) is pasted on the sample two sides of pasting board, it is ensured that 20 times the reciprocal 2min average accumulateds that measure strain
≤50με.When the temperature decreases, sample occurs to freeze contracting, and side pasting board is closely bonded with sample by elastic restoring force, measures
Contraction distortion；When temperature increases, sample expands, and spring is smaller to specimen temperature deformation effect, similarly, the weight in glidepath
Multiple above-mentioned spring installation steps；Side sensor one end is close to the induction zone of side pasting board, and reserves enough collapsing lengths, it will
The tail end of sensor is fixed on the middle part benchmark column of peripheral frame, will by the side sensor fixing end on the benchmark column of middle part
Sensor tail is fixed, and standard sample is put into this three-dimensional swell-shrink deformation measuring device, places top pasting board, top is sensed
Device is mounted at the sensor fixing end of top pasting board, peripheral frame upper cover is placed, in order to improve test system to high/low temperature
Applicability keeps simulated environment truer, and sensor selects low temperature resistant sensor (- 30 DEG C), bi-directional expansion side head, range ability
5mm.This three-dimensional test device is put into freezing-thawing case, when temperature increases, sample expands deformation, causes side pasting board
It is slided on upper and lower slide rail, at this point, the displacement that sensor is small by measuring pasting board, to measure the dilatancy of sample；Work as temperature
Degree reduces, and sample occurs to freeze compression deformation, and by the elastic restoring force of spring between sliding block, side pasting board is in close contact with sample, is passed
Sensor is by measuring the contraction displacement of pasting board, to measure the contraction distortion of sample, test specimen under the conditions of testing thawing
When 3 D deformation rule, which can guarantee the integrality of the continuity and test test specimen of test data.
In Figure 5, on pedestal bottom plate (15), four correction socles (21) is adjusted, pedestal bottom plate (15) outer ledge is made
Front side level(l)ing bubble (13) between two parties, meanwhile, also make side level(l)ing bubble (14) between two parties, make pedestal bottom plate (15) be in it is horizontal
State.
In figure 6, side pasting board (20) and upper sliding rail rack (5) are rigidly connected, and so that this part is passed through upper sliding rail and slides
Block (7) is slidably connected with upper sliding rail (9).Upper sliding rail spring (11) is installed between two upper sliding-rail slidings (7)；Similarly, side
Portion pastes version (20) and is rigidly connected with glidepath holder (6), this part is connected by glidepath sliding block (8) and glidepath (10) sliding
It connects, glidepath spring (12) is installed between two glidepath sliding blocks (8).
In the figure 7, upper and lower slide rail (9), (10) use the form that right-angled intersection is misplaced, and are rigidly attached to middle part respectively
On benchmark column (18)；Side sensor (2) is connected on middle part benchmark column (18), and solid with side sensor fixing end (4)
It is fixed.Top pasting board (19) is put in above sample, and upper sensor (1) is made to be in close contact with top pasting board (19), uses top
Sensor fixing end (3) is fixed in peripheral frame upper cover (16), and integral outer frame is made to close.
The course of work is as follows：
Soil body sample (22) is placed pedestal bottom plate (15) to hit exactly, side pasting board (20) is made closely to be pasted with sample (22)
It closes, upper pasting board (19), which is placed sample (22), to be hit exactly, and connects each section sensor.This device is integrally placed at freezing-thawing case
Interior, when temperature is raised and lowered, when sample generates expansion or shrinkage, top pasting board (19) and side pasting board (20) will produce shifting
Dynamic, upper sensor (1) and side sensor (2) placed on it will collect movement and deformation, reflect that area's soil body freeze thawing of trembling with fear becomes
Shape rule, the construction for high-grade cold area's line project provide quality assurance.
Claims (3)
1. a kind of cold area's Modified soil three-dimensional swell-shrink deforms indoor test system, it is characterised in that：
The outer ledge of pedestal bottom plate is respectively provided with front side level(l)ing bubble and side level(l)ing bubble, and being equipped with below pedestal bottom plate makes
Pedestal bottom plate is in four correction socles of horizontality,
Pedestal bottom plate can be made to be in horizontality by adjusting four correction socles under pedestal bottom plate；
Two sliding rails of pedestal bottom plate center arranged beneath, the form being misplaced using right-angled intersection, corresponding welding is solid respectively
It is scheduled on the middle part benchmark column of peripheral frame；
Corresponding two-by-two, pass through sliding block and right-angled intersection with fixing bracket respectively two by four side pasting boards for measuring deformation
Sliding rail is connected, and is connected as the entirety that can not be split, and wherein side pasting board is grid construction；
Before test, first two side pasting boards and upper sliding rail rack (5) are rigidly connected, and this part is made to pass through upper sliding-rail sliding
(7) it is slidably connected with upper sliding rail (9), between upper sliding rail spring (11) is installed on two upper sliding-rail slidings (7), in sample (22)
On indicate up and down, each three groups of planes of symmetry around, paste foil gauge at front and back symmetrical two sides center, wait for that foil gauge bonds jail
Gu after, sample (22) is placed on pedestal bottom plate (15), it is ensured that side pasting board (20) comes into full contact with sample (22) left and right two sides,
And 20 reciprocal average accumulateds measured in 2 minutes strain≤50 μ ε, write down the elastic coefficient and connection length at this time；Together
Other two side patch version is rigidly connected with glidepath holder (6), this part by glidepath sliding block (8) and is glided by reason
Rail (10) is slidably connected, between glidepath spring (12) is installed on two glidepath sliding blocks (8), this glidepath spring (12)
Coefficient of elasticity and connection length are consistent with upper sliding rail spring (11).
2. system according to claim 1, it is characterised in that：Side pasting board material is the larger aluminium sheet of thermal coefficient, meanwhile,
The pasting board periphery length of side is less than the sample length of side, and bottom plate side is more than the test specimen length of side, and baseboard material is the smaller invar of thermal coefficient.
3. the method for application system as claimed in claim 1 or 2, it is characterised in that：When the temperature decreases, sample occurs to freeze contracting,
Side pasting board is closely bonded with sample by elastic restoring force, measures contraction distortion；When temperature increases, sample expands；
Standard sample (22) is positioned over pedestal bottom plate (15) center, makes four side pasting boards and its exact contact, by four sides
The contact zone of side pasting board is close to sensor telescopic head one end in portion, and the tail end of side sensor is fixed on to the middle part of peripheral frame
On benchmark column (18), top pasting board (19) is placed, upper sensor telescopic head one end is close to the contact zone of top pasting board (19),
Upper sensor tail end is fixed on peripheral frame upper cover (16) center, places peripheral frame upper cover, solid by adjusting five tail ends
Fixed end makes five sensor telescopic heads be compressed at the half of its length, can effectively record its change when ensuring expansion and contraction
Shape；
Three-dimensional test device is put into freezing-thawing case, when the temperature increases, sample expands deformation, causes side pasting board
It is slided on upper and lower slide rail, at this point, the horizontal displacement that side sensor is small by measuring pasting board, to measure sample level two
The dilatancy in direction, and top pasting board can generate vertical displacement under the action of expansive force, to measure sample in vertical direction
Dilatancy；When the temperature decreases, sample shrinks deformation, passes through the horizontal resiliency restoring force of spring between sliding block, side
Pasting board and sample are in close contact, and sensor is by measuring the contraction horizontal displacement of pasting board, to measure the horizontal both direction of sample
Contraction distortion, and top pasting board can measure contraction distortion of the sample in vertical direction under gravity to bottom offset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810055712.1A CN108362728B (en) | 2018-01-19 | 2018-01-19 | Indoor test system for three-dimensional expansion deformation of modified soil in cold region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810055712.1A CN108362728B (en) | 2018-01-19 | 2018-01-19 | Indoor test system for three-dimensional expansion deformation of modified soil in cold region |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108362728A true CN108362728A (en) | 2018-08-03 |
| CN108362728B CN108362728B (en) | 2020-04-28 |
Family
ID=63006465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810055712.1A Expired - Fee Related CN108362728B (en) | 2018-01-19 | 2018-01-19 | Indoor test system for three-dimensional expansion deformation of modified soil in cold region |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108362728B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567428A (en) * | 2019-09-12 | 2019-12-13 | 东北电力大学 | Frozen expansive soil body displacement detection device and installation method thereof |
| CN111398049A (en) * | 2020-03-24 | 2020-07-10 | 河海大学 | Device for testing bidirectional thermal shrinkage stress and frost heaving stress of frozen water-containing asphalt mixture |
| CN114646753A (en) * | 2021-12-24 | 2022-06-21 | 中铁二十四局集团有限公司 | Concrete expansion and shrinkage deformation testing system in curing period |
| WO2023277853A3 (en) * | 2021-06-30 | 2023-03-02 | Eskisehir Teknik Universitesi | Volume change measuring apparatus for frozen porous media |
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| CN2196301Y (en) * | 1994-05-27 | 1995-05-03 | 西安交通大学 | Measuring apparatus for film thermal coefficient of expansion |
| JP3503927B2 (en) * | 1998-09-07 | 2004-03-08 | 財団法人電力中央研究所 | Triaxial cell, triaxial test apparatus and triaxial test method |
| CN101178395A (en) * | 2007-12-05 | 2008-05-14 | 中国科学院武汉岩土力学研究所 | Non-contact type rock three-way shrinkage test device and test method |
| CN103543250A (en) * | 2013-10-29 | 2014-01-29 | 上海大学 | Undisturbed three-way contraction testing device |
| CN204854605U (en) * | 2015-04-24 | 2015-12-09 | 温州大学 | Survey device is warp in breathing of concrete solid structure |
| CN205941548U (en) * | 2016-07-22 | 2017-02-08 | 中交一公局厦门工程有限公司 | Trapped orbit formula concrete shrinkage test device |
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2018
- 2018-01-19 CN CN201810055712.1A patent/CN108362728B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2196301Y (en) * | 1994-05-27 | 1995-05-03 | 西安交通大学 | Measuring apparatus for film thermal coefficient of expansion |
| JP3503927B2 (en) * | 1998-09-07 | 2004-03-08 | 財団法人電力中央研究所 | Triaxial cell, triaxial test apparatus and triaxial test method |
| CN101178395A (en) * | 2007-12-05 | 2008-05-14 | 中国科学院武汉岩土力学研究所 | Non-contact type rock three-way shrinkage test device and test method |
| CN103543250A (en) * | 2013-10-29 | 2014-01-29 | 上海大学 | Undisturbed three-way contraction testing device |
| CN204854605U (en) * | 2015-04-24 | 2015-12-09 | 温州大学 | Survey device is warp in breathing of concrete solid structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567428A (en) * | 2019-09-12 | 2019-12-13 | 东北电力大学 | Frozen expansive soil body displacement detection device and installation method thereof |
| CN110567428B (en) * | 2019-09-12 | 2021-04-09 | 东北电力大学 | Frozen expansive soil body displacement detection device and installation method thereof |
| CN111398049A (en) * | 2020-03-24 | 2020-07-10 | 河海大学 | Device for testing bidirectional thermal shrinkage stress and frost heaving stress of frozen water-containing asphalt mixture |
| WO2023277853A3 (en) * | 2021-06-30 | 2023-03-02 | Eskisehir Teknik Universitesi | Volume change measuring apparatus for frozen porous media |
| CN114646753A (en) * | 2021-12-24 | 2022-06-21 | 中铁二十四局集团有限公司 | Concrete expansion and shrinkage deformation testing system in curing period |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108362728B (en) | 2020-04-28 |
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