CN106526129A - One-way freezing-thawing natural water replenishing device - Google Patents
One-way freezing-thawing natural water replenishing device Download PDFInfo
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- CN106526129A CN106526129A CN201610947339.1A CN201610947339A CN106526129A CN 106526129 A CN106526129 A CN 106526129A CN 201610947339 A CN201610947339 A CN 201610947339A CN 106526129 A CN106526129 A CN 106526129A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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Abstract
Due to the fact that more and more defects such as subsidence and frost boiling appear and are especially serious in the spring-thawing period, research on the influence of the freezing-thawing cycle on a soil body is urgently required. A one-way freezing-thawing natural water replenishing device is provided. The device comprises a water replenishing soil layer (6) which is placed in a water replenishing tank, the periphery and bottom of the water replenishing tank are provided with thermal insulation materials (3), a top plate (8) is arranged on the upper portion of the water replenishing tank, a test specimen containing hole is formed in the center of the top plate, a test specimen (5) is placed in the test specimen containing hole, when the test specimen is placed, the exterior of the test specimen is wrapped by a rubber membrane (11), filter paper (10) is placed at the position, where the test specimen is placed, of the water replenishing soil layer, an opening of the rubber membrane wrapping the test specimen is placed on the filter paper, a specimen temperature sensor (13) is arranged on the lower portion of the filter paper, a cooling chamber (4) is arranged on the upper portion of the top plate, and the exterior of the cooling chamber is also provided with the thermal insulation materials. The invention relates to the field of geological survey, and particularly relates to the natural water replenishing device applied to one-way freezing-thawing.
Description
Technical field：
The present application relates to a kind of geologic prospect field, more particularly to a kind of unidirectional freeze thawing nature moisturizing device.
Background technology：
Subgrade strength and deformation directly affect road surface bearing capacity, and with the constantly improve of Traffic Net, road is more and more
Appearance depression, the disease such as frost boiling, melt the phase in the spring especially serious, therefore, research impact of the Frozen-thawed cycled to the soil body is very urgent；
China seasonal frost region is widely distributed, accounts for the 53% of area, and many mega projects are built in seasonal frost region, and Frozen-thawed cycled is one
Individual extremely complex process, field test are particularly complicated, and carrying out research to the relevant issues of Frozen-thawed cycled using laboratory experiment is
Current main research meanses, in order to preferably study Frozen-thawed cycled problem, many scholars have carried out unremitting research, at the beginning
It is that three-dimensional is freezed, directly sample is put in refrigerator or cryogenic box, is tested after sample freezing-thawing, then as research
It was found that, it is exist that three-dimensional is frozen in embankment embankment, but Unidirectional Freezing is also generally existing, therefore, occur in that unidirectional
Freezing plant；While research is goed deep into, it is found that while that not moisturizing freezing system is present in nature, but nature freezing process
Generally there is water replenishment to migrate, even if negligible this moisturizing affects in some cases, the water charging system of Unidirectional Freezing is remained
The major way that nature freezes, classifies with regard to moisturizing, conventional unidirectional Frozen-thawed cycled system just have two kinds, i.e. closed system and
Open water charging system, the major drawbacks of traditional closed system are fed with regard to no moisture, are existed in nature less；And open system
It is then that test sample is directly connected with external water source, this results in sample and quickly absorbs water saturation, bearing capacity declines and destroys,
Such case is also less, and what the destruction of road foundation only had minority is bursted and become muddy when a thaw sets in during road freeze thawing, and relatively conventional destruction is
Roadbed settlement is caused, and such case roadbed absorbs a small amount of moisture in frozen-thaw process, closes water system and open system cannot
True to reflect, the representative common situation that resulting experimental rules can not be practical under this experimental condition is a kind of unidirectionally to freeze
Melt nature moisturizing device and directly reflect universal seasonal frost region roadbed freeze thawing mode, device is placed in into refrigerator or connection is dropped in upper end
Warm system, can be while unidirectional freeze thawing be simulated, it is ensured that test sample directly absorbs moisture from soil, can almost reflect nature
The universal freeze thawing mode in boundary, and it is easy to make, low cost, simple to operate.
The content of the invention：
It is an object of the invention to provide a kind of unidirectional freeze thawing nature moisturizing device.
Above-mentioned purpose is realized by following technical scheme：
A kind of unidirectional freeze thawing nature moisturizing device, its composition include：Moisturizing soil layer, described moisturizing soil layer are placed on water supply tank
In, described water supply tank surrounding and bottom have insulation material, and described moisturizing upper box part has top board, described top board center
Test sample putting hole is provided with, test sample is placed with described test sample putting hole, described test sample is placed
When, its outer wrap has rubber film, places in described moisturizing soil layer and be also placed with filter paper at the position of test sample, described
It is placed on filter paper at the rubber film opening of test sample overcoat, also there is specimen temperature sensor in described filter paper bottom,
The outside that the top of described top board has cooling chamber, described cooling chamber equally has insulation material, described cooling chamber's tool
There is circulation pipe, described circulation pipe connection cryogenic box, described cooling are indoor with cooling chamber's temperature sensor.
Described unidirectional freeze thawing nature moisturizing device, the material of described top board is insulation material, and described rubber film makes
Test sample closed upper part, lower open, described test specimen temperature sensor and described cooling chamber's temperature sensor are by leading
Line connects Temperature sampler, and polyurethane foam filler is adopted when the insulation material of described water supply tank is connected with top board, described
Test sample putting hole when being connected with rubber film using polyurethane foam filler, the thermal insulating material of the outside of described cooling chamber
Equally using polyurethane foam filler when material is connected with top board.
Soil sample is placed in hole before test by described unidirectional freeze thawing nature moisturizing device, described top board structure
Interior fixation, sample bottom will project sub-fraction to be preferably connected with bottom moisturizing soil layer.
Described unidirectional freeze thawing nature moisturizing device, described moisturizing soil layer, as sample bottom projects sub-fraction, institute
So that moisturizing soil layer and sample coupling part are suitably done softer, to prevent sample to be subject to crushing.
Described unidirectional freeze thawing nature moisturizing device, the adopted low-temperature circulating system of device, the power of cryogenic box want big by one
A bit, circulation pipe will keep and shorten as far as possible, to reduce heat exchange, if lacking cryogenic box, also can be by water supply tank and upper plate
Test during refrigerator is placed directly on after cohering, but insulation material will thicken.
The method of operating of described unidirectional freeze thawing nature moisturizing device, is characterized in that：Its step is：（1）Upper plate is encapsulated：
Heat-insulating heat-preserving material is formed into lower openings soil case using glued together using polyurethane foam filler first, top board is formed
The hole more bigger than test sample, test sample is placed in rubber film, one section of closing, one section of opening, then is placed on
In hole, using cranny filler of polyurethane foam fixing seal, stand-by, upper plate encapsulation is completed, stand-by；（2）Bottom water supply tank envelope
Dress：In process of the test, the soil of specific moisture content is placed in into unsealed water supply tank and does moisturizing soil layer, by the closely knit of design requirement
Degree hits reality, and is laying the position of test sample, lays test specimen temperature sensor, and places filter paper thereon, will be packaged
Upper plate cranny filler of polyurethane foam coheres closing, and unsealed soil sample section passes through filter paper and moisturizing soil layer in bottom is contacted, soil
Case overall package is completed；（3）Cooling chamber encapsulates：The circulation pipe of cryogenic box is placed in into the cooling box of lower openings, built-in temperature is passed
Sensor, coupling part are closed with foam gap filler, then by cranny filler of polyurethane foam, the bottom soil case completed with encapsulation is cohered
Sealing；（4）Device to test；After system assembles are completed, start cooling indoor equipment, cooling chamber is lowered the temperature, by temperature
Sensor test cooling chamber and moisturizing soil temperature, after treating freezing plateau, stop cooling, cooling chamber are raised to design temperature,
Melted, specific state can be selected as needed to take out soil sample carries out correlation test；Adopted by Temperature sampler record
Collection related data, draws recording curve；（5）After system is completed, freezing test, collection cooling room temperature and sample bottom are opened
Temperature；（6）After freezing-thawing, soil sample is taken out, soil sample is cut into into four sections from top to bottom, numbering 1,2,3,4 is contained
Water rate is tested.
Beneficial effects of the present invention：
1. device is placed in refrigerator or connects cooling system in upper end by the unidirectional freeze thawing nature moisturizing device of the present invention, can be
While simulating unidirectional freeze thawing, it is ensured that test sample directly absorbs moisture from soil, can almost reflect the universal freeze thawing of nature
Mode, and it is easy to make, low cost, simple to operate.
The unidirectional freeze thawing nature moisturizing device of the present invention, its maximum advantage is more can really to reflect objective reality
The frozen state on border, natural moisturizing effect in simulation freezing process, the i.e. direct slow-absorbing moisture from soil layer, coordinates temperature
The use of sensor, more efficiently seizure melting state, and then obtain reliable result of the test.
The unidirectional freeze thawing nature moisturizing device of the present invention, its cardinal principle is exactly to simulate natural freezing water supplementing method, test
Sample directly can freely absorb moisture from bottom soil layer in freezing process, and this water supplementing method that freezes can either overcome tradition to close
Formula system can preferably simulate the jelly under nature again without the excessive too fast moisturizing shortcoming of water recharging and open water charging system
Knot process, by slow moisturizing, top-down Unidirectional Freezing simulates nature moisturizing freezing process, buries near test bottom
Temperature sensor, moreover it is possible to accurately grasp the freezing-thawing state of soil sample, also solves test in the past and is difficult to accurately catch and freeze
The drawbacks of melting the moment.
The unidirectional freeze thawing nature moisturizing device of the present invention, with good practicality, can reflect objective reality, and cost
It is low, it is simple to operate.
Description of the drawings：
Accompanying drawing 1 is the unidirectional freeze thawing nature moisturizing system structure diagram of the present invention.
Accompanying drawing 2 is the encapsulating structure schematic diagram of the unidirectional freeze thawing nature moisturizing system of the present invention.
Accompanying drawing 3 is the encapsulating structure packaged type schematic diagram of the unidirectional freeze thawing nature moisturizing system of the present invention.
Accompanying drawing 4 is the enlarged drawing of the mark A of the accompanying drawing 1 of the present invention.
Accompanying drawing 5 is the temperature lowering curve of the present invention.
Accompanying drawing 6 is the plot of water cut of the present invention.
In figure：1 circulation pipe；2 cryogenic boxes；3 insulation materials；4 cooling chamber；5 test samples；6 —
Moisturizing soil layer；7 polyurethane foam fillers；8 top boards；9 test specimen temperature sensors；10 filter paper；11 rubber
Film；12 wires；13 Temperature samplers；14 cooling chamber's temperature sensors.
Specific embodiment：
Embodiment 1：
A kind of unidirectional freeze thawing nature moisturizing device, its composition include：Moisturizing soil layer, described moisturizing soil layer 6 are placed on water supply tank
In, described water supply tank surrounding and bottom have insulation material 3, and described moisturizing upper box part has top board 8, in described top board
The heart is provided with test sample putting hole, in described test sample putting hole is placed with test sample 5, and described test sample is put
When putting, its outer wrap has rubber film 11, places in described moisturizing soil layer and be also placed with filter paper 10 at the position of test sample,
It is placed on filter paper at the rubber film opening of described test sample overcoat, also passes with specimen temperature in described filter paper bottom
Sensor 13, the outside that the top of described top board has cooling chamber 4, described cooling chamber equally have insulation material, described
Cooling chamber has circulation pipe 1, and described circulation pipe connection cryogenic box 2, described cooling are indoor with cooling chamber's temperature sensor
14。
Embodiment 2：
Unidirectional freeze thawing nature moisturizing device according to claim 1, the material of described top board is insulation material, described
Rubber film makes test sample closed upper part, lower open, described test specimen temperature sensor 9 and described cooling chamber's TEMP
Device connects Temperature sampler by wire 12, and the insulation material of described water supply tank is filled out using polyurethane foam when being connected with top board
Fill agent 7, when described test sample putting hole is connected with rubber film, adopt polyurethane foam filler, described cooling chamber it is outer
Polyurethane foam filler is adopted when the insulation material in portion is connected with top board equally.
Embodiment 3：
Unidirectional freeze thawing nature moisturizing device according to claim 2, described top board structure, by soil sample before test
It is placed in hole and fixes, sample bottom will projects sub-fraction to be preferably connected with bottom moisturizing soil layer.
Embodiment 4：
Unidirectional freeze thawing nature moisturizing device according to claim 2, described moisturizing soil layer, as sample bottom projects
Fraction, so moisturizing soil layer and sample coupling part are suitably done into softer, to prevent sample to be subject to crushing.
Embodiment 5：
Unidirectional freeze thawing nature moisturizing device according to claim 2, the adopted low-temperature circulating system of device, the work(of cryogenic box
Rate is larger, and circulation pipe will keep and shorten as far as possible, to reduce heat exchange, if lacking cryogenic box, also can be by water supply tank
It is placed directly on after cohering with upper plate in refrigerator and tests, but insulation material will thickeies.
Embodiment 6：
A kind of method of operating of the unidirectional freeze thawing nature moisturizing device described in utilization claim 1 to 5, is characterized in that：Its step
For：（1）Upper plate is encapsulated：Heat-insulating heat-preserving material is formed into bottom using glued together using polyurethane foam filler first
The native case of opening, top board form the hole more bigger than test sample, test sample are placed in rubber film, one section of closing, and one
Section opening, then be placed in hole, using cranny filler of polyurethane foam fixing seal, stand-by, upper plate encapsulation is completed, and is treated
With；（2）Bottom water supply tank encapsulation：In process of the test, the soil of specific moisture content is placed in into unsealed water supply tank and does moisturizing soil
Layer, hits reality by the packing of design requirement, and laying the position of test sample, lays test specimen temperature sensor, and thereon
Place filter paper, packaged upper plate cranny filler of polyurethane foam cohered into closing, unsealed soil sample section by filter paper with
Moisturizing soil layer in bottom is contacted, and native case overall package is completed；（3）Cooling chamber encapsulates：The circulation pipe of cryogenic box is placed in into lower openings
Cooling box, built-in temperature sensor, coupling part are closed with foam gap filler, then by cranny filler of polyurethane foam, with envelope
The bottom soil case for installing coheres sealing；（4）Device to test；After system assembles are completed, start cooling indoor equipment, to cooling
Room is lowered the temperature, and tests cooling chamber and moisturizing soil temperature by temperature sensor, after treating freezing plateau, stops cooling, will
Cooling chamber is raised to design temperature, is melted, and specific state can be selected as needed to take out soil sample carries out correlation test；It is logical
Excess temperature collector record collection related data, draws recording curve；（5）After system is completed, freezing test, collection drop are opened
Greenhouse temperature and sample bottom temp；（6）After freezing-thawing, soil sample is taken out, soil sample is cut into into four sections from top to bottom,
Numbering 1,2,3,4, carries out water cut test.
Claims (6)
1. a kind of unidirectional freeze thawing nature moisturizing device, its composition include：Moisturizing soil layer, is characterized in that：Described moisturizing soil layer is put
Put in water supply tank, described water supply tank surrounding and bottom have insulation material, and described moisturizing upper box part has top board, described
Top board center be provided with test sample putting hole, be placed with test sample, described examination in described test sample putting hole
When testing sample placement, its outer wrap has rubber film, places in described moisturizing soil layer and is also placed with the position of test sample
Filter paper, is placed on filter paper at the rubber film opening of described test sample overcoat, also has sample in described filter paper bottom
Temperature sensor, the outside that the top of described top board has cooling chamber, described cooling chamber equally have insulation material, described
Cooling chamber there is circulation pipe, described circulation pipe connection cryogenic box, described cooling is indoor to have cooling chamber's temperature sensor.
2. unidirectional freeze thawing nature moisturizing device according to claim 1, is characterized in that：The material of described top board is insulation
Material, described rubber film make test sample closed upper part, lower open, described test specimen temperature sensor and described cooling
Room temperature sensor connects Temperature sampler by wire, and poly- ammonia is adopted when the insulation material of described water supply tank is connected with top board
Ester foam filling agent, adopts polyurethane foam filler, described drop when described test sample putting hole is connected with rubber film
Polyurethane foam filler is adopted when the insulation material of the outside in greenhouse is connected with top board equally.
3. unidirectional freeze thawing nature moisturizing device according to claim 2, is characterized in that：Described top board structure, tests it
Before soil sample is placed in hole fixed, sample bottom will project sub-fraction to be preferably connected with bottom moisturizing soil layer
Connect.
4. unidirectional freeze thawing nature moisturizing device according to claim 2, is characterized in that：Described moisturizing soil layer, due to examination
Sample bottom projects sub-fraction, so moisturizing soil layer and sample coupling part are suitably done into softer, to prevent sample quilt
Damage by pressure.
5. unidirectional freeze thawing nature moisturizing device according to claim 2, is characterized in that：The adopted low-temperature circulating system of device
System, the power of cryogenic box are larger, and circulation pipe will keep and shorten as far as possible, to reduce heat exchange, if lacking cryogenic box,
Also can be placed directly in refrigerator after cohering water supply tank and upper plate and test, but insulation material will thicken.
6. a kind of method of operating of the unidirectional freeze thawing nature moisturizing device described in utilization claim 1 to 5, is characterized in that：Its step
Suddenly it is：（1）Upper plate is encapsulated：Heat-insulating heat-preserving material is utilized into glued together using polyurethane foam filler first, under formation
Portion's opening soil case, top board form the hole more bigger than test sample, test sample are placed in rubber film, one section of closing,
One section of opening, then be placed in hole, using cranny filler of polyurethane foam fixing seal, stand-by, upper plate encapsulation is completed, and is treated
With；（2）Bottom water supply tank encapsulation：In process of the test, the soil of specific moisture content is placed in into unsealed water supply tank and does moisturizing soil
Layer, hits reality by the packing of design requirement, and laying the position of test sample, lays test specimen temperature sensor, and thereon
Place filter paper, packaged upper plate cranny filler of polyurethane foam cohered into closing, unsealed soil sample section by filter paper with
Moisturizing soil layer in bottom is contacted, and native case overall package is completed；（3）Cooling chamber encapsulates：The circulation pipe of cryogenic box is placed in into lower openings
Cooling box, built-in temperature sensor, coupling part are closed with foam gap filler, then by cranny filler of polyurethane foam, with envelope
The bottom soil case for installing coheres sealing；（4）Device to test；After system assembles are completed, start cooling indoor equipment, to cooling
Room is lowered the temperature, and tests cooling chamber and moisturizing soil temperature by temperature sensor, after treating freezing plateau, stops cooling, will
Cooling chamber is raised to design temperature, is melted, and specific state can be selected as needed to take out soil sample carries out correlation test；It is logical
Excess temperature collector record collection related data, draws recording curve；（5）After system is completed, freezing test, collection drop are opened
Greenhouse temperature and sample bottom temp；（6）After freezing-thawing, soil sample is taken out, soil sample is cut into into four sections from top to bottom,
Numbering 1,2,3,4, carries out water cut test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610947339.1A CN106526129B (en) | 2016-10-26 | 2016-10-26 | Unidirectional freeze thawing nature moisturizing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610947339.1A CN106526129B (en) | 2016-10-26 | 2016-10-26 | Unidirectional freeze thawing nature moisturizing device |
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| CN106526129A true CN106526129A (en) | 2017-03-22 |
| CN106526129B CN106526129B (en) | 2019-05-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361522A (en) * | 2019-07-29 | 2019-10-22 | 哈尔滨理工大学 | A kind of moisturizing freeze thawing device and method for frozen soil experiment |
| CN115950910A (en) * | 2023-03-10 | 2023-04-11 | 湖南大学 | Tester for deformation characteristics of soil body under dry-wet or freeze-thaw cycle effect |
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| CN205280714U (en) * | 2015-12-31 | 2016-06-01 | 长安大学 | Vertical moisturizing device of soil body in experimental section of thick bamboo of soil |
| JP2017106866A (en) * | 2015-12-11 | 2017-06-15 | Ｊｆｅスチール株式会社 | Evaluation method of high durability fine aggregate for concrete |
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| CN101923085A (en) * | 2010-07-06 | 2010-12-22 | 中交第二公路勘察设计研究院有限公司 | Multifunctional road soil roadbed freezing and thawing circulating test device |
| CN203587589U (en) * | 2013-12-04 | 2014-05-07 | 新疆农业大学 | Freezing-melting circulation detecting device suitable for natural saline soils |
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| CN110361522A (en) * | 2019-07-29 | 2019-10-22 | 哈尔滨理工大学 | A kind of moisturizing freeze thawing device and method for frozen soil experiment |
| CN115950910A (en) * | 2023-03-10 | 2023-04-11 | 湖南大学 | Tester for deformation characteristics of soil body under dry-wet or freeze-thaw cycle effect |
| CN115950910B (en) * | 2023-03-10 | 2023-11-14 | 湖南大学 | Soil deformation characteristic tester under dry-wet or freeze-thawing cyclic effect |
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| Publication number | Publication date |
|---|---|
| CN106526129B (en) | 2019-05-07 |
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