CN102520003A - Device for testing ambient-temperature gradient freezing and thawing processes - Google Patents
Device for testing ambient-temperature gradient freezing and thawing processes Download PDFInfo
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- CN102520003A CN102520003A CN2011103879801A CN201110387980A CN102520003A CN 102520003 A CN102520003 A CN 102520003A CN 2011103879801 A CN2011103879801 A CN 2011103879801A CN 201110387980 A CN201110387980 A CN 201110387980A CN 102520003 A CN102520003 A CN 102520003A
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Abstract
The invention discloses a device for testing ambient-temperature gradient freezing and thawing processes. The device is structurally characterized in that a thermostatic chamber is composed of a temperature control top, an organic glass cylinder and a temperature control bottom plate; a soil body sample is put in the thermostatic chamber; a temperature measurement probe is inserted into the organic glass cylinder; the temperature measurement probe is externally connected to a data acquirer through a conducting wire; a temperature control top plate and the temperature control bottom plate are externally connected with a top plate temperature control cryostat and a bottom plate temperature control cryostat outside; a water replenishing pipe and an adjusting pipe in the soil body sample pass through a small hole on the temperature control bottom plate; the water replenishing pipe is connected to a Maliaote bottle; the adjusting pipe is arranged outside a thermal insulation cover; a temperature conductive cover is positioned among an upper thermal insulation cover, a lower thermal insulation cover and the thermostatic chamber; a displacement sensor is in inserted connection on the temperature conductive cover; and the Maliaote bottle and the thermal insulation cover are arranged on a bracket. The device disclosed by the invention is capable of providing required test data for the relation between frost heaving and thawing-settlement amount and temperature change under conditions of different temperatures, different densities, different soil textures, different water contents and the like. A detection device and a test method are provided for frozen soil and frozen soil engineering in china in terms of researches on the natural frost heaving and thawing-settlement phenomenon.
Description
Technical field
The present invention relates to a kind ofly carry out the soil frost heave thaw collapse to different soil and detect, can obtain the environment temperature gradient type frozen-thaw process test unit that body frost heaving thaw collapse phenomenon and temperature variation concern test figure.
Technical background
China is that ever frost distribution area the third-largest state ever frost and seasonal frozen ground are distinguished cloth area and accounted for 21.5% and 53.5% of national area respectively in the world, and frozen soil is that a kind of temperature is lower than 0 ℃ and contain the Tu Yan of ice.Frozen soil is a kind of special great soil group; Its singularity shows that mainly its character and temperature are closely related, and cold district's surface soil layer causes soil profile to reproduce because temperature fluctuation annual period produces and freezes repeatedly and melt; This phenomenon of reproducing shows as water translocation highlightedly and causes that the fractional condensation ice sheet occurs; Finally cause body frost heaving, after the soil body surface temperature raises, can produce the thaw collapse phenomenon again, this frost heave thaw collapse phenomenon can cause destruction and engineering works safe in utilization of cold district each item engineering works.Carry out the soil frost heave thaw collapse to different soil and detect a kind of frozen soil frozen-thaw process test unit of development; Can obtain body frost heaving thaw collapse phenomenon and temperature variation and concern test figure, for frozen soil and frozen soil engineering are providing a kind of pick-up unit and test method aspect nature frost heave thaw collapse phenomenon Study.
Summary of the invention
In view of above-mentioned; The object of the invention aims to provide a kind of environment temperature gradient type frozen-thaw process test unit; Be to different soil properties and disturbance or original state soil body sample, under different densities different moisture content and condition of different temperatures, carry out open system (moisturizing) and closed system.The test of frozen soil frost heave thaw collapse detects; The soil frost heave amount is to obtain through the electronic displacement sensor collection; Temperature acquisition adopts the thermistor temperature detecting probe to obtain, and the open system water replanishing device adopts horse Liao Te bottle to carry out moisturizing, comes simulating nature circle recharge of ground water mode.This test method can satisfy frozen soil and the frozen soil engineering research testing requirements that test is proposed to the frost heave thaw collapse.
The objective of the invention is to realize like this:
A kind of environment temperature gradient type frozen-thaw process test unit; Comprise that stay-warm case, temperature control top board, environment temperature lead warm cover, temperature probe, organic glass tube, temperature control base plate, stay-warm case, the cryostat of external top board temperature control, the cryostat of external base plate temperature control, displacement transducer, external data Acquisition Instrument, horse Liao Te bottle, water pipe, support and soil body sample down; It is characterized in that constant temperature enclosure is then to be made up of temperature control top board, organic glass tube and temperature control base plate; The temperature control top board places organic glass tube top; The temperature control base plate is positioned at the bottom of organic glass tube, and soil body sample is placed in one; The organic glass tube has temperature probe, and temperature probe is through lead external data Acquisition Instrument, and cryostat links to each other the temperature control top board with external base plate temperature control with outside external top board temperature control cryostat respectively with the temperature control base plate; Filling pipe and adjustable pipe pass the aperture on the temperature control base plate in the soil body sample; Filling pipe connects horse Liao Te bottle, and adjustable pipe connects stay-warm case, and temperature is led the temperature cover and is between stay-warm case, following stay-warm case and the constant temperature enclosure; Temperature is led the temperature cover and is gone up the grafting displacement transducer, and horse Liao Te bottle and stay-warm case place on the support.
Advantage of the present invention:
1, constant temperature enclosure is made up of the dress soil container of a sealing together temperature control top board, temperature control base plate and organic glass tube; Constant temperature enclosure is covered with upper and lower stay-warm case outward again, environment temperature is led the temperature cover; Isolated ambient temperature guarantees the precision of soil body sample frozen-thaw process to the interference of test specimen.
2, the organic glass tube is inserted with the temperature probe of different gradients, and temperature probe is through lead external data Acquisition Instrument, and data collecting instrument can be gathered the data of different gradient soil body sample frozen-thaw processes, for the research of artificial frozen soil freeze thawing mechanism provides technical guarantee.
3, adjustable pipe is used for regulating the water level in the horse Liao Te bottle.Make the pressure of soil sample bottom in air pressure, hydraulic pressure, external pressure and the organic glass tube in the horse Liao Te bottle reach equilibrium state.
4, the control of constant temperature enclosure temperature adopts temperature control top board and the interior circulation alcohol of base plate to regulate required test temperature through low temperature cryostat refrigeration temperature control, makes the constant temperature enclosure temperature be in temperature constant state.
Description of drawings
Fig. 1 is a synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described again:
As shown in Figure 1; A kind of environment temperature gradient type frozen-thaw process test unit; Comprise that stay-warm case 1, temperature control top board 2, environment temperature lead temperature cover 3, temperature probe 4, organic glass tube 5, temperature control base plate 6, stay-warm case 7, external top board temperature control cryostat 8, external base plate temperature control cryostat 9, displacement transducer 10, external data Acquisition Instrument 11, horse Liao Te bottle 12, aqueduct 13, support 14, soil body sample 15 and adjustable pipe 16 down; Constant temperature enclosure is then to be made up of temperature control top board 2, organic glass tube 5 and temperature control base plate 6; Temperature control top board 2 places organic glass tube 5 tops, and temperature control base plate 6 is positioned at the bottom of organic glass tube 5, and soil body sample 15 is placed in one.Temperature control top board 2, temperature control base plate 6 and soil body sample environment temperature are led temperature cover 3 and are adopted and lead the good aluminium alloy of temp effect or copper metal material is manufactured.Soil body sample 15 is the cylindrical soil sample of high 100mm diameter 100mm; Organic glass tube 5 adopts thickness 20mm plexi-glass tubular to make; Be inserted with temperature probe 4 in the tube, temperature probe 4 is through lead external data Acquisition Instrument 11, and temperature control top board 2 links to each other with external base plate temperature control cryostat 9 with outside external top board temperature control cryostat 8 respectively with temperature control base plate 6; Filling pipe 13 passes the aperture on the temperature control base plate 6 with adjustable pipe 16 in the soil body sample 15; Aqueduct 13 connects horse Liao Te bottle 12, and adjustable pipe 16 places outside the stay-warm case 1, is used for regulating the water level in the horse Liao Te bottle 12.Temperature is led temperature cover 3 and is between stay-warm case (1), following stay-warm case 7 and the constant temperature enclosure, and temperature is led grafting displacement transducer 10 on the temperature cover 3, and horse Liao Te bottle 12 places on the support 14 with stay-warm case 1.
Describe below in conjunction with concrete process of the test, prepare soil sample before the test on request and the test tank body 5 of packing in, and connecting line makes an experiment.Temperature through control temperature control top board 2 and temperature control base plate 6 during test reaches required test upper and lower end temperature; Unlatching through horse Liao Te bottle aqueduct 16 comes simulating nature circle recharge of ground water mode with sealing control moisturizing condition; Through contact the axial displacement of the soil body in the electronic displacement sensor 10 acquisition test processes with temperature control top board 2; Gather the temperature of sample different layers position through placing the temp probe 4 that contacts with soil sample on the tank wall; Thereby the temperature in the acquisition entire test under the unidirectional freezing condition of sample, volume change situation, and then can obtain the frost heave thaw collapse amount of different soil properties, different moisture content soil sample and the variation tendency that changes with temperature conditions, moisturizing condition thereof.
Claims (1)
1. environment temperature gradient type frozen-thaw process test unit; Comprise that stay-warm case (1), temperature control top board (2), environment temperature lead temperature cover (3), temperature probe (4), organic glass tube (5), temperature control base plate (6), stay-warm case (7), external top board temperature control cryostat (8), external base plate temperature control cryostat (9), displacement transducer (10), external data Acquisition Instrument (11), horse Liao Te bottle (12), water pipe (13), support (14) and soil body sample (15) down; It is characterized in that constant temperature enclosure is then to be made up of temperature control top board (2), organic glass tube (5) and temperature control base plate (6); Temperature control top board (2) places organic glass tube (5) top; Temperature control base plate (6) is positioned at the bottom of organic glass tube (5), and soil body sample (15) is placed in one; Organic glass tube (5) is inserted with temperature probe (4); Temperature probe (4) is through lead external data Acquisition Instrument (11); Temperature control top board (2) links to each other with external base plate temperature control cryostat (9) with outside external top board temperature control cryostat (8) respectively with temperature control base plate (6), and filling pipe (13) and adjustable pipe (16) pass the aperture on the temperature control base plate (6) in the soil body sample (15), and filling pipe (13) connects horse Liao Te bottle (12); Adjustable pipe (16) places outside the stay-warm case (1); Temperature is led temperature cover (3) and is between stay-warm case (1), following stay-warm case (7) and the constant temperature enclosure, and temperature is led temperature cover (3) and gone up grafting displacement transducer (10), and horse Liao Te bottle (12) and stay-warm case (1) place on the support (14).
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| CN2011103879801A CN102520003A (en) | 2011-11-29 | 2011-11-29 | Device for testing ambient-temperature gradient freezing and thawing processes |
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| CN2011103879801A CN102520003A (en) | 2011-11-29 | 2011-11-29 | Device for testing ambient-temperature gradient freezing and thawing processes |
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| CN103364266A (en) * | 2013-07-24 | 2013-10-23 | 中国矿业大学 | Two-dimensional temperature gradient frozen soil test device and use method thereof |
| CN103487564A (en) * | 2013-07-23 | 2014-01-01 | 北京交通大学 | Double-chamber determinator for volume frost-heaving ratio of frozen soil |
| CN103557907A (en) * | 2013-10-31 | 2014-02-05 | 中国科学院寒区旱区环境与工程研究所 | Automatic water level (water quantity) recording device |
| CN104034863A (en) * | 2014-06-26 | 2014-09-10 | 中国工程物理研究院总体工程研究所 | Freezing-thawing centrifugal model box in freezing-thawing deformation centrifugal simulation system |
| CN104215566A (en) * | 2013-06-04 | 2014-12-17 | 中国科学院寒区旱区环境与工程研究所 | Visual soil freeze-thawing process test apparatus |
| CN104730100A (en) * | 2015-03-05 | 2015-06-24 | 中国科学院寒区旱区环境与工程研究所 | Device for testing hydrothermal variation features of hydrous porous medium in freeze thawing process |
| CN104977321A (en) * | 2015-07-14 | 2015-10-14 | 中国矿业大学 | Method for measuring freeze-thaw damage gradient and anisotropy |
| CN105158440A (en) * | 2015-08-29 | 2015-12-16 | 西安科技大学 | Indoor frozen soil water migration rule simulating system and characteristic parameter measuring method |
| CN105241753A (en) * | 2015-07-06 | 2016-01-13 | 河北工程大学 | Apparatus and method of hydraulic lining concrete compression test under controllable temperature gradient |
| CN105300808A (en) * | 2015-11-09 | 2016-02-03 | 重庆交通大学 | Soil freezing and thawing cycle test device in triaxial test conditions and test method |
| CN105352989A (en) * | 2015-10-27 | 2016-02-24 | 天津市港源试验仪器厂 | Geo-technical frozen soil frost heave experiment machine |
| CN105651976A (en) * | 2015-12-30 | 2016-06-08 | 同济大学 | Concrete coupled heat and moisture transfer testing device and method |
| CN107064474A (en) * | 2017-03-22 | 2017-08-18 | 青海大学 | A kind of swollen characteristic test apparatus of the salt of salinized soil |
| CN107907655A (en) * | 2017-11-09 | 2018-04-13 | 安徽理工大学 | Multifunctional Frozen complex boundary thaw collapse coefficient measuring instrument |
| CN108037268A (en) * | 2017-12-21 | 2018-05-15 | 吉林大学 | A kind of controllable temperature body frost heaving experimental rig |
| CN108195877A (en) * | 2017-12-21 | 2018-06-22 | 吉林大学 | It can carry out the body frost heaving experimental rig of water salt supply |
| CN108344850A (en) * | 2017-12-29 | 2018-07-31 | 吉林大学 | By load soil mass water-Re-power-shift assays system and method under freezing-thawing |
| CN108362727A (en) * | 2017-12-22 | 2018-08-03 | 北京交通大学 | Visualize two-way frost heave experimental bench |
| CN108398453A (en) * | 2018-02-08 | 2018-08-14 | 中国科学院寒区旱区环境与工程研究所 | A kind of three samples linkage freezing-thawing test system for simulating soil body frozen-thaw process in real time |
| CN108445192A (en) * | 2018-05-31 | 2018-08-24 | 北京城建集团有限责任公司 | A kind of multi-functional frost heave, thaw collapse experimental rig |
| CN108519405A (en) * | 2018-05-02 | 2018-09-11 | 中国科学院寒区旱区环境与工程研究所 | A set of testing equipment for studying power and deformation relationship during body frost heaving |
| CN108956937A (en) * | 2018-05-23 | 2018-12-07 | 安徽理工大学 | The experimental provision and experimental method of the artificial Freezing stratum as rapid of multi-parameter dynamic acquisition |
| CN109298161A (en) * | 2018-11-05 | 2019-02-01 | 重庆大学 | A kind of test device of soil sample internal water branch and temperature field |
| CN109490350A (en) * | 2018-12-12 | 2019-03-19 | 石家庄铁道大学 | Ventilation type body frost heaving experimental rig and test method |
| CN109738478A (en) * | 2019-01-18 | 2019-05-10 | 绍兴文理学院元培学院 | A kind of high-precision body frost heaving process automation monitoring system |
| CN109781957A (en) * | 2017-11-12 | 2019-05-21 | 兰州城市学院 | A kind of soil function test barrel |
| CN109884110A (en) * | 2019-03-22 | 2019-06-14 | 辽宁工程技术大学 | A kind of laboratory testing rig and method for simulating subgrade engineering freeze-thaw damage phenomenon |
| CN111307855A (en) * | 2020-02-17 | 2020-06-19 | 北京建筑大学 | A frost heaving test system for ice lens body is surveyd |
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| CN114018970A (en) * | 2021-11-08 | 2022-02-08 | 哈尔滨工业大学 | Multifunctional freezing low-temperature model test device for cold region |
| CN115144429A (en) * | 2022-09-01 | 2022-10-04 | 中国有色金属工业昆明勘察设计研究院有限公司 | Deep saturated soft tailing undisturbed sample frost heaving test system and method |
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| CN114018970A (en) * | 2021-11-08 | 2022-02-08 | 哈尔滨工业大学 | Multifunctional freezing low-temperature model test device for cold region |
| CN114018970B (en) * | 2021-11-08 | 2024-02-09 | 哈尔滨工业大学 | Multifunctional freezing low-temperature model test device for cold region |
| CN115144429A (en) * | 2022-09-01 | 2022-10-04 | 中国有色金属工业昆明勘察设计研究院有限公司 | Deep saturated soft tailing undisturbed sample frost heaving test system and method |
| CN115144429B (en) * | 2022-09-01 | 2022-11-11 | 中国有色金属工业昆明勘察设计研究院有限公司 | Deep saturated soft tailing undisturbed sample frost heaving test system and method |
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Application publication date: 20120627 |