CN106404825A - Frost-heaving ratio and thaw-settlement coefficient simultaneous determination tester for soil body - Google Patents
Frost-heaving ratio and thaw-settlement coefficient simultaneous determination tester for soil body Download PDFInfo
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- CN106404825A CN106404825A CN201610838149.6A CN201610838149A CN106404825A CN 106404825 A CN106404825 A CN 106404825A CN 201610838149 A CN201610838149 A CN 201610838149A CN 106404825 A CN106404825 A CN 106404825A
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- 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
- G01N25/14—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
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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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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a frost-heaving ratio and thaw-settlement coefficient simultaneous determination tester for a soil body. The tester comprises a soil body filling barrel with two run-through ends, wherein a water tank is arranged at the bottom of the soil body filling barrel; the water tank is connected with a water source supplementing device for keeping a water level in the water tank constant; the upper part of the soil body filling barrel is connected with a low-temperature stabilizing system for enabling the soil body to be in a low constant temperature state and a plurality of displacement sensors for detecting displacement of the soil body; a plurality of temperature and humidity sensors for detecting the moisture content and the temperature of the soil body are arranged on the soil body filling barrel in an inserting manner; the displacement sensors and the temperature sensors are respectively connected to a main control computer through a displacement data acquirer and a moisture and temperature recorder. On the premise of guaranteeing a stable water level, the tester can simultaneously measure a frost-heaving ratio and a thaw-settlement coefficient of the soil body under two conditions with water source supplementation and without water source supplementation, and can further measure changes of a temperature field and a moisture field of the soil body in a frost-thaw process, so that a moisture migration rule that the moisture field is changed with the temperature field in a gradient manner can be explained.
Description
Technical field
The invention belongs to soil mass property field tests are and in particular to a kind of body frost heaving rate and thaw collapse coefficient simultaneous determination try
Test instrument.
Background technology
The frost boiling of road is the distinctive phenomenon in seasonal frozen soil region.It is also one of most common disease of highway engineering, generation
Frequency is big, and scope is wide, and impact is more serious.And frost heave is the main cause of induction frost boiling.The frost heave of the soil body mainly uses frost heave
Rate is characterizing.
However, there is following defect in terms of soil body freeze thawing property test at present：First, domestic frozen-heave factor and thaw collapse coefficient
Test be carried out separately, waste time and energy；2nd, conventional method is applied to clay soil and the less sand soil of particle diameter.For viscous
For matter soil and the less sand soil of particle diameter, sample box can use external diameter 120mm, wall thickness 10mm, the lucite cylinder of high 100mm
As side wall, but for the larger soil of particle diameter because instrument is less than normal, often deviation is larger for result of the test；3rd, conventional frost heave
Rate is tested, and the moisture not measuring soil body sample vertical direction changes, the temperature change of the soil sample differing heights simply measuring,
Can not illustrate due to the change in temperature field in Freezing Soils, and the redistribution phenomenon of the moisture field caused.
Content of the invention
It is an object of the invention to provide a kind of body frost heaving rate and thaw collapse coefficient simultaneous determination tester, above-mentioned to overcome
The defect that prior art exists, the present invention can measure the soil body simultaneously and having or not water source benefit on the premise of guaranteed water level is stable
To the frozen-heave factor under the conditions of two kinds and thaw collapse coefficient；Meanwhile, temperature field in frozen-thaw process for the soil body can also be measured
Change with moisture field is it may be said that the Moisture Transfer Rule that changes with temperature gradient of open fire branch.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that：
Body frost heaving rate and thaw collapse coefficient simultaneous determination tester, the soil body including two ends insertion loads bucket, and the soil body loads
The bottom of bucket is provided with tank, tank is connected with for making water level in tank keep constant water recharging device, the soil body is filled out
Barrelling top be connected with for make the soil body be in cryogenic thermostat state cryogenic thermostat system and some for detecting soil body position
The displacement transducer moving, the soil body loads also to intert on bucket and is provided with some temperature and humidity sensings for detecting soil body moisture and temperature
Device, described displacement transducer and Temperature Humidity Sensor respectively by displacement data harvester and moisture moisture recorder connect to
Main control computer.
Further, cryogenic thermostat system includes the temperature lowering board being arranged on above the soil body and is arranged on outside soil body filling cylinder
The low temperature thermostat bath of side, the arrival end of temperature lowering board and the port of export pass through the hose connection port of export to low temperature thermostat bath and entrance
End.
Further, it is provided with heat-preservation cotton above the outside of soil body filling cylinder and temperature lowering board.
Further, the soil body filling cylinder barrel on the downside of be provided with some water seepage holes, and water seepage hole be located at tank in waterline with
Under.
Further, the outer of tank is fixed with some threaded rods, and the top of threaded rod is fixed with crossbeam, displacement transducer
It is fixed on crossbeam by pressing plate.
Further, Temperature Humidity Sensor loads the axially arranged one-tenth string of cylinder along the soil body, and Temperature Humidity Sensor is along soil
The radial direction of body filling cylinder is interspersed to be arranged in the soil body.
Further, described water recharging device is geneva bottle, and tank is connected by rubber tube with geneva bottle.
Further, the soil body loads cylinder is lucite cylinder.
Further, the soil body loads cylinder is cylinder, its a diameter of 20cm, a height of 40cm, and wall thickness is 1.5cm.
Compared with prior art, the present invention has following beneficial technique effect：
The present invention adopts the soil body to load cylinder and loads soil, and loading soil in cylinder using water recharging device for the soil body provides water
Source feeds, and ensures the cryogenic thermostat state of the soil body using cryogenic thermostat system, using displacement transducer and Temperature Humidity Sensor inspection
Survey the displacement data of the soil body and warm and humid degrees of data, main control computer can calculate body frost heaving rate and thaw collapse system by surveyed data
Number, the present invention can measure the soil body in the frozen-heave factor having or not under the conditions of water source supplements two kinds and thaw collapse coefficient, user simultaneously
Just, structure is simple, flexible operation.
Further, cryogenic thermostat system includes being arranged on the soil body and loads temperature lowering board inside cylinder, above the soil body of filling,
And be arranged on the soil body load cylinder outside low temperature thermostat bath, in low temperature thermostat bath, coolant can be set, through temperature lowering board to soil
Body carries out cryogenic thermostat process it is ensured that the stability of temperature and operability in experimentation.
Further, it is provided with some water seepage holes on the downside of soil body filling cylinder barrel, and water seepage hole is located at waterline one in tank
Under, the water in tank carries out water recharging by water seepage hole to the soil body in cylinder, can measure under conditions of guaranteed water level is stable
Frozen-heave factor in the case of having water recharging for the soil body and thaw collapse coefficient.
Further, displacement transducer is fixed by the crossbeam being arranged on threaded rod, it is to avoid displacement transducer from
The error that body movement causes.
Further, Temperature Humidity Sensor loads the axially arranged one-tenth string of cylinder along the soil body, and Temperature Humidity Sensor is along soil
The radial direction of body filling cylinder is interspersed to be arranged in the soil body, can measure vertical change of temperature field in process of frost heave for the soil body and moisture
Field change, illustrates the Transport that moisture changes with temperature gradient.
Further, it is provided with heat-preservation cotton on the upside of the outside of soil body filling cylinder and temperature lowering board, soil body low temperature can be effectively ensured
Constant temperature.
Further, the soil body load cylinder be cylinder, its a diameter of 20cm, a height of 40cm, wall thickness be 1.5cm it is adaptable to
The larger soil of particle diameter is as test object.
Brief description
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 (a) is the assembling front view of the soil body filling cylinder of the present invention；
Fig. 2 (b) is the assembling side elevation of the soil body filling cylinder of the present invention；
Fig. 2 (c) is the assembling top view of the soil body filling cylinder of the present invention；
Fig. 3 (a) is the structural front view of the tank of the present invention；
Fig. 3 (b) is the structural side view of the tank of the present invention；
Fig. 3 (c) is the structure top view of the tank of the present invention.
Wherein, 1- threaded rod；2- crossbeam；3- displacement transducer；The 4- soil body loads cylinder；5- temperature lowering board；6- temperature and humidity sensing
Device；7- low temperature thermostat bath；8- geneva bottle；9- displacement data harvester；10- moisture moisture recorder；11- main control computer；12-
Tank；13- flexible pipe；14- rubber tube.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail：
Referring to Fig. 1, Fig. 2 (a)～Fig. 2 (c) and Fig. 3 (a)～Fig. 3 (c), a kind of body frost heaving rate and thaw collapse coefficient are combined
Determination test instrument, the soil body including two ends insertion loads cylinder 4, and it is cylindrical lucite cylinder that the soil body loads cylinder 4, and it is a diameter of
20cm, a height of 40cm, wall thickness is 1.5cm.The soil body loads and is placed in tank 12 below cylinder 4.The soil body loads bucket (4) top and is connected with
For making the soil body be in the cryogenic thermostat system of cryogenic thermostat state, tank 12 base plate interts and is fixed with threaded rod 1, and screw thread
Bar 1 is symmetrically positioned in soil body filling cylinder 4 both sides.Crossbeam 2 is fixed with threaded rod 1, displacement transducer 3 is fixed on crossbeam 2, and feels
Should hold and stand on temperature lowering board 5.The soil body loads also to intert on cylinder 4 and is provided with some biographies of the humitures for detecting soil body moisture and temperature
Sensor 6, in order to sense the change in moisture field and temperature field at differing heights in the soil body.Displacement transducer 3 and Temperature Humidity Sensor 6
Pass through displacement data harvester 9 respectively and moisture moisture recorder 10 connects to main control computer 11, in order to gather and to record examination
Test data.Main control computer 11 can calculate body frost heaving rate and thaw collapse coefficient by surveyed data, be located at the soil body simultaneously and load
The Temperature Humidity Sensor 6 of cylinder 4 axial directions can also measure thermograde change in process of frost heave for the soil body and moisture change, permissible
The Transport that moisture changes with thermograde is described.
Cryogenic thermostat system includes being placed in inside soil body filling cylinder 4, the temperature lowering board 5 of test soil sample upper surface, and temperature lowering board 5 leads to
Cross flexible pipe 13 and be connected with the low temperature thermostat bath 7 being arranged on soil body filling cylinder 4 outside, form closed circuit, returned by cold-producing medium
Circulating in road, provides required constant low temperature for test, in order to make the soil body be in unidirectional cryogenic thermostat state.Soil
Body loads the preformed hole leaving on side tube-wall on cylinder 4 for interting flexible pipe 13, temperature lowering board 5 leaves activity excuse, is easy in cylinder
After the completion of soil tamp, the access of temperature lowering board 5, make the more flexible convenience of experimental apparatus.
It is placed in tank 12 under soil body filling cylinder 4, tank 12 is connected with geneva bottle (8) by rubber tube (14), in order to
In tank during guarantee test, waterline stablizes it is ensured that in process of the test, the water pressure invariableness that soil sample is born is it is ensured that test
The reliability of condition and operability, using broad sense law of connected vessels, make constant-voltage system.Constant needed for providing for test
Water level supply line.Ensure that the reliability and feasibility of test.
When measuring frozen-heave factor under having water source supplementary condition for the soil body and thaw collapse coefficient, open the tap of geneva bottle 8
Switch, adjusts geneva bottle 8, makes stable level in tank 12 test desired position.Supplement bar when measuring the soil body at no water source
When the frozen-heave factor under part and thaw collapse coefficient, geneva bottle 8 need not be opened.
Operating process to the present invention is described in detail below：
During use, first the soil body is loaded cylinder 4 and carry out native sample compacting, after the completion of hitting reality, the soil body is loaded cylinder 4 and is transferred to water
In groove 12.Tank 12 is connected with geneva bottle 8 by rubber tube 14, sets up constant-voltage system, be the water replenishment in process of the test
Constant water level is provided.Temperature lowering board 5 is placed in soil sample top, and is connected with extraneous low temperature thermostat bath 7 with flexible pipe 13.Then by position
The upper end of displacement sensor 3 is fixed on crossbeam 2 by pressing plate, and lower end stands on temperature lowering board 5, is carried out by the movement of temperature lowering board 5
Monitoring of soil displacement.Temperature Humidity Sensor 6 is fixed on the soil body load on cylinder 4, record displacement is collected by main control computer 11
The data that data acquisition unit 9 and moisture moisture recorder 10 collect.Pass through surveyed data to calculate body frost heaving rate and melt
Heavy coefficient, the Temperature Humidity Sensor 6 being simultaneously located at soil body filling cylinder 4 axial direction can also measure temperature in process of frost heave for the soil body
Graded and the change of moisture field are it may be said that open fire divides the Transport with thermograde change.
When measuring frozen-heave factor under having water source supplementary condition for the soil body and thaw collapse coefficient, open the tap of geneva bottle 8
Switch, adjusts geneva bottle 8, makes stable level in tank 12 test desired position.Supplement bar when measuring the soil body at no water source
When the frozen-heave factor under part and thaw collapse coefficient, geneva bottle 8 need not be opened.
Claims (9)
1. body frost heaving rate and thaw collapse coefficient simultaneous determination tester are it is characterised in that the soil body including two ends insertion loads bucket
(4), the bottom of soil body filling bucket (4) is provided with tank (12), tank (12) is connected with for making the interior water level of tank (12) protect
Hold constant water recharging device, the soil body loads bucket (4) top and is connected with for making the soil body be in the low temperature of cryogenic thermostat state
Constant temperature system and some displacement transducers (3) for detecting land movement, the soil body load on bucket (4) also interspersed be provided with some
For detecting the Temperature Humidity Sensor (6) of soil body moisture and temperature, described displacement transducer (3) and Temperature Humidity Sensor (6)
Pass through displacement data harvester (9) respectively and moisture moisture recorder (10) connects to main control computer (11).
2. body frost heaving rate according to claim 1 and thaw collapse coefficient simultaneous determination tester are it is characterised in that low temperature is permanent
Warm system includes the temperature lowering board (5) being arranged on above the soil body and is arranged on the low temperature thermostat bath outside soil body filling cylinder (4)
(7), the arrival end of temperature lowering board (5) and the port of export connect the port of export and arrival end to low temperature thermostat bath (7) by flexible pipe (13).
3. body frost heaving rate according to claim 2 and thaw collapse coefficient simultaneous determination tester are it is characterised in that the soil body is filled out
It is provided with heat-preservation cotton above the outside of fitted tube (4) and temperature lowering board (5).
4. body frost heaving rate according to claim 1 and thaw collapse coefficient simultaneous determination tester are it is characterised in that the soil body fills
Fill out and be provided with some water seepage holes on the downside of cylinder (4) barrel, and water seepage hole is located at below the interior waterline of tank (12).
5. body frost heaving rate according to claim 1 and thaw collapse coefficient simultaneous determination tester are it is characterised in that tank
(12) outer is fixed with some threaded rods (1), and the top of threaded rod (1) is fixed with crossbeam (2), and displacement transducer (3) passes through
Pressing plate is fixed on crossbeam (2).
6. body frost heaving rate according to claim 1 and thaw collapse coefficient simultaneous determination tester are it is characterised in that humiture
Sensor (6) loads the axially arranged one-tenth string of cylinder (4) along the soil body, and Temperature Humidity Sensor (6) loads the footpath of cylinder (4) along the soil body
It is arranged in the soil body to interspersed.
7. body frost heaving rate according to claim 1 and thaw collapse coefficient simultaneous determination tester are it is characterised in that described
Water recharging device is geneva bottle (8), and tank (12) is connected by rubber tube (14) with geneva bottle (8).
8. body frost heaving rate according to claim 1 and thaw collapse coefficient simultaneous determination tester are it is characterised in that the soil body is filled out
Fitted tube (4) is lucite cylinder.
9. body frost heaving rate according to claim 1 and thaw collapse coefficient simultaneous determination tester are it is characterised in that the soil body is filled out
Fitted tube (12) is cylinder, its a diameter of 20cm, a height of 40cm, and wall thickness is 1.5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610838149.6A CN106404825A (en) | 2016-09-21 | 2016-09-21 | Frost-heaving ratio and thaw-settlement coefficient simultaneous determination tester for soil body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610838149.6A CN106404825A (en) | 2016-09-21 | 2016-09-21 | Frost-heaving ratio and thaw-settlement coefficient simultaneous determination tester for soil body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106404825A true CN106404825A (en) | 2017-02-15 |
Family
ID=57997169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610838149.6A Pending CN106404825A (en) | 2016-09-21 | 2016-09-21 | Frost-heaving ratio and thaw-settlement coefficient simultaneous determination tester for soil body |
Country Status (1)
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| CN (1) | CN106404825A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108548841A (en) * | 2018-05-22 | 2018-09-18 | 北京城建集团有限责任公司 | A kind of constant pressure frost heave test benefit drainage arrangement of real-time monitoring water variation |
| CN108844988A (en) * | 2018-05-22 | 2018-11-20 | 石家庄铁道大学 | Soil body steam migration follow-up mechanism and Tracing Experiment method under Freezing-Melting Condition |
| CN117054315A (en) * | 2023-10-13 | 2023-11-14 | 东北林业大学 | Frozen soil permeability coefficient measurement system |
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| JPH095226A (en) * | 1995-06-21 | 1997-01-10 | Masatoshi Aoki | Soil moisture sensor |
| 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 |
| CN102435717A (en) * | 2011-09-21 | 2012-05-02 | 南京林业大学 | Soil frost-heaving and thawing-settlement tester based on thermoelectric refrigeration control |
| CN202486125U (en) * | 2012-01-05 | 2012-10-10 | 中国科学院寒区旱区环境与工程研究所 | Experimental device for indoor frozen soil freezing and thawing circulation process |
| CN103776984A (en) * | 2014-02-24 | 2014-05-07 | 黑龙江省水利科学研究院 | Joint test device and method for expansion and frost heaving of soil body |
| CN105372284A (en) * | 2015-12-04 | 2016-03-02 | 长安大学 | Device and method for testing frost heaving parameter of soil under standard compaction work |
| CN205157556U (en) * | 2015-12-02 | 2016-04-13 | 长安大学 | Soil body frozen -heave factor and melting sinks coefficient and jointly surveys test instrument |
| 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 |
-
2016
- 2016-09-21 CN CN201610838149.6A patent/CN106404825A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH095226A (en) * | 1995-06-21 | 1997-01-10 | Masatoshi Aoki | Soil moisture sensor |
| 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 |
| CN102435717A (en) * | 2011-09-21 | 2012-05-02 | 南京林业大学 | Soil frost-heaving and thawing-settlement tester based on thermoelectric refrigeration control |
| CN202486125U (en) * | 2012-01-05 | 2012-10-10 | 中国科学院寒区旱区环境与工程研究所 | Experimental device for indoor frozen soil freezing and thawing circulation process |
| CN103776984A (en) * | 2014-02-24 | 2014-05-07 | 黑龙江省水利科学研究院 | Joint test device and method for expansion and frost heaving of soil body |
| CN205157556U (en) * | 2015-12-02 | 2016-04-13 | 长安大学 | Soil body frozen -heave factor and melting sinks coefficient and jointly surveys test instrument |
| CN105372284A (en) * | 2015-12-04 | 2016-03-02 | 长安大学 | Device and method for testing frost heaving parameter of soil under standard compaction work |
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548841A (en) * | 2018-05-22 | 2018-09-18 | 北京城建集团有限责任公司 | A kind of constant pressure frost heave test benefit drainage arrangement of real-time monitoring water variation |
| CN108844988A (en) * | 2018-05-22 | 2018-11-20 | 石家庄铁道大学 | Soil body steam migration follow-up mechanism and Tracing Experiment method under Freezing-Melting Condition |
| 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 |
| CN108445192B (en) * | 2018-05-31 | 2023-11-17 | 北京城建集团有限责任公司 | Multifunctional frost heaving and thawing test device |
| CN117054315A (en) * | 2023-10-13 | 2023-11-14 | 东北林业大学 | Frozen soil permeability coefficient measurement system |
| CN117054315B (en) * | 2023-10-13 | 2024-01-09 | 东北林业大学 | Frozen soil permeability coefficient measurement system |
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Application publication date: 20170215 |
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