CN106124553B - A kind of novel and multifunctional frost heave test instrument - Google Patents
A kind of novel and multifunctional frost heave test instrument Download PDFInfo
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- CN106124553B CN106124553B CN201610537859.5A CN201610537859A CN106124553B CN 106124553 B CN106124553 B CN 106124553B CN 201610537859 A CN201610537859 A CN 201610537859A CN 106124553 B CN106124553 B CN 106124553B
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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
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses the test devices of a kind of frost-heave force of rock-soil material, free frozen-heave factor and constant pressure frozen-heave factor, it is characterised in that：It is made of steel reaction frame, refrigerant agent container (including refrigerant agent inlet and outlet), turntable, screw thread, constant pressure bar, load sensor, the double-deck adiabatic lateral spacing ring, limited block, steel plate (with fluted), refrigerant agent, magnetic displacement meter.Refrigerant agent carries out Unidirectional Freezing by steel plate groove to sample, and magnetic displacement meter is used for measuring the frozen-heave factor of sample, and load sensor is used for measuring the frost-heave force of sample.The advantage of the invention is that the frozen-heave factor and frost-heave force of rock-soil material accurate can be measured, and it is vdiverse in function, it is simple and practical, as a result reliably.
Description
Technical field
Free frozen-heave factor, the perseverance of Frozen Rock and Soil material are measured in being tested present invention is mainly used for the Unidirectional Freezing of rock-soil material
Frozen-heave factor and frost-heave force are pressed, is a kind of novel measuring device, it is multiple functional, it is easy to operate.
Background technology
In engineering with artificial freezing method work progress, frost heave can cause fracture of freezing pipe, meanwhile, the frost heave of ground can jeopardize attached
The safety of nearly pipeline and building, so frost heave test index is the important indicator of frozen soil performance, it is important in frozen soil experiment
Pilot project, important evidence when being engineering design.Frost-heaving deformation becomes ice by water phase in soil, volume expansion is formed, and water
Freeze to include two parts, first, the original position of water is freezed in soil, second is that migrating water freezing caused by freezing.Influence body frost heaving because
Be known as it is very much, but be summed up moisture in the granularmetric composition nothing more than soil, mineral composition, soil, density, temperature, load and
Salinity.According to national standard《Standard for test methods of earthworks》(GB/T50123-1999), the maximum frost heaving amount of sample and sample are former
Long ratio is the frozen-heave factor of sample.Frost-heave force refers to freezing the soil body when frozen-heave factor is zero to restraining structure after frost heave generation
The maximum pressure applied.
Invention content
The technical problem to be solved by the present invention is to provide a kind of novel, easy instrument to measure Frozen Rock and Soil material
Frost-heave force, constant pressure frozen-heave factor and free frozen-heave factor.
To achieve the above object, the present invention can take technical solution as follows：A kind of novel and multifunctional frost heave experiment instrument, by steel
Reaction frame, refrigerant agent container (including refrigerant agent inlet and outlet), steel plate, turntable, screw thread, constant pressure bar, load sensor,
The compositions such as limited block, magnetic displacement meter, the double-deck adiabatic lateral spacing ring.The steel reaction frame is fixed on the base, and sheet-steel cover is in refrigerant
On agent container, there is the circular groove of an a diameter of 4D (D is soil sample diameter) at its center, have a small-sized round platform (straight in groove
Diameter is D), sample is placed on round platform, it is therefore an objective to it prevents condensed water aggregation, freeze to have an impact experimentation and result, meanwhile,
The position for limiting sample keeps it placed in the middle.In refrigerant agent container lower end, refrigerant agent outlet is on the upper side in refrigerant agent container for refrigerant agent import
End, and refrigerant agent outlet bottom end maintains an equal level in top in steel plate groove, it is therefore an objective to and ensure to carry out sample is Unidirectional Freezing.It is cold
Mediator container belongs to heat-insulation system, therefore its material should be thermal insulation material, because groove to be freezed to sample and pressure-bearing, institute
Tentatively to draft material as steel plate.Refrigerant agent container is welded with steel reaction frame.Low-temperature receiver is from external refrigeration system, loading sensing
Device is for measuring frost-heave force.The measurement of constant pressure frozen-heave factor only need to utilize constant pressure bar to sample on the basis of without pressure frozen-heave factor experiment
Apply certain load, other experimental methods and the determination step without pressure frozen-heave factor are all identical.The double-deck thermal insulation lateral spacing ring it is interior
Ring is to limit the lateral frost heave of sample, the non-conductor material of the heat such as double-deck lateral spacing ring central filler cotton, to ensure to try
The Unidirectional Freezing of sample.Refrigerant agent container needs to take certain Insulation to keep the stabilization of solidification point.
The basic theories principle of the present invention：According to national standard《Standard for test methods of earthworks》(GB/T50123-1999),
The maximum frost heaving amount of sample and the frozen-heave factor that the ratio of sample original length is sample.Calculation formula is as follows：
In formula：η is frozen-heave factor, %；Δ h is maximum frost heaving amount, mm；HfDo not include frost heaving amount, mm for the depth of freezing.Examination
It tests and subtracts thermostatic process soil body deflection under load action for sample elemental height.
Patent of the present invention has the beneficial effect that：Operating method is simple and practicable, and outcome measurement is accurately reliable.It can measure and freeze
The frost-heave force of rock-soil material, free frozen-heave factor and constant pressure frozen-heave factor.
Description of the drawings
Fig. 1 is the frost-heave force determination experiment main structure diagram of the present invention, and Fig. 2 is the frost-heave force determination experiment of the present invention
Overlooking structure diagram.
Fig. 3 is the free frozen-heave factor determination experiment main structure diagram of the present invention, and Fig. 4 is the free frozen-heave factor of the present invention
Determination experiment overlooking structure diagram.
Fig. 5 is the constant pressure frozen-heave factor determination experiment main structure diagram of the present invention, and Fig. 6 is the constant pressure frozen-heave factor of the present invention
Determination experiment overlooking structure diagram.
In figure：1 steel reaction frame；2 refrigerant agent container outlets；3 turntables；4 screw threads；5 load sensors；6 samples；7 pairs
The adiabatic lateral spacing steel loop of layer；8 limited blocks；9 steel plates；10 refrigerant agent vessel inlets；11 refrigerant agents；12 magnetic displacement meters；13 constant pressure bars；
14 refrigerant agent containers.
Specific implementation mode
Invention is further described in detail below in conjunction with the accompanying drawings：
The present invention is mainly by steel reaction frame, refrigerant agent container, steel plate, turntable, screw thread, constant pressure bar, limited block, loading
Sensor, magnetic displacement meter are composed, and inject the refrigerant agent of assigned temperature into refrigerant agent container by external refrigeration system,
The temperature in groove is measured with thermometer, the double-deck adiabatic side on housing sleeve on the round platform after it reaches and formulates temperature in groove
The rock-soil material sample of ring is limited, cushion block is placed, magnetic displacement meter is installed, after frost heave stabilization, you can frost heaving amount is read, to ask
Come from by frozen-heave factor.The measurement of constant pressure frozen-heave factor only need to install constant pressure by being shown on the basis of free frozen-heave factor measurement device
Bar, you can obtain constant pressure frozen-heave factor.When measuring frost-heave force, magnetic displacement meter is unloaded, is passed by figure installed load on steel reaction frame
Sensor, rotation turntable apply pressure, and when sample restores elemental height, the pressure that load sensor measures is frost-heave force.
Specific implementation step is as follows：
(1) steel bracket made in advance is fixed on the base, injects specified temperature thereto from refrigerant agent vessel inlet
The refrigerant agent of degree.
(2) sample is fabricated to standard cylindrical sample.
(3) temperature in groove is measured with thermometer, after it reaches specified solidification point, soil sample is put into setting of fixing
In standby, i.e., in steel loop, and on the round platform being placed on together in groove.
(4) cushion block is placed on sample, magnetic displacement meter is installed, and zeroing records displacement after waiting for that displacement meter registration is stablized
Meter reading, as frost heaving amount, to calculate free frozen-heave factor.
(5) magnetic displacement meter is removed, installation turntable, screw thread, load sensor and limited block rotate driven by rotary disc spiral shell
Line screw thread applies pressure by load sensor and limited block to sample, and when it restores elemental height, load sensor measures
Pressure be frost-heave force.
(6) when surveying constant pressure frozen-heave factor, preceding 3 steps are identical, and constant pressure bar is only installed at step (4), until experiment is complete
Terminate to unload load in portion.Other steps are identical, and so it will not be repeated.
The height of application vernier caliper measurement sample, waits measuring its height after testing again, twice before sample installation
Difference in height is frost heaving amount, to can also find out frozen-heave factor.The step is only checking experiment result.
Basic principles and main features, novelty and the advantage of the present invention is described and described to above section.The skill of the industry
It should be appreciated that the present invention is not limited by above-mentioned implementation example, described in above-mentioned implementation example and specification is art personnel
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (3)
1. a kind of novel and multifunctional frost heave test instrument, it is characterised in that：The tester by steel bracket, refrigerant agent container, turntable,
Screw thread, load sensor, constant pressure bar, the double-deck adiabatic lateral spacing ring, limited block, steel plate, refrigerant agent, magnetic displacement meter are constituted；
Wherein refrigerant agent container includes that refrigerant agent import and refrigerant agent export；The turntable applies pressure with screw thread to sample, compels
Frost heave sample is set to restore elemental height；For the sheet-steel cover on refrigerant agent container, the steel plate strip is fluted, and refrigerant agent passes through institute
It states groove and Unidirectional Freezing is carried out to sample；There is a round cushion cap in the groove at center, places sample on round cushion cap, play
Position-limiting action to sample simultaneously prevents condensed water from being had an impact to experimentation and result；The limited block for limit sample with
Position between load sensor；The constant pressure bar is to provide constant pressure to sample by frictional damping；Load sensor
For measuring the frost-heave force of sample；Magnetic displacement meter is used for measuring the frozen-heave factor of sample.
2. novel and multifunctional frost heave test instrument as described in claim 1, it is characterised in that：The steel bracket is mounted on pedestal
On, undertake end reaction.
3. novel and multifunctional frost heave test instrument as described in claim 1, it is characterised in that：The refrigerant agent of the refrigerant agent container
Outlet bottom end supports flat, guarantee sample Unidirectional Freezing with groove-bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610537859.5A CN106124553B (en) | 2016-07-08 | 2016-07-08 | A kind of novel and multifunctional frost heave test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610537859.5A CN106124553B (en) | 2016-07-08 | 2016-07-08 | A kind of novel and multifunctional frost heave test instrument |
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| Publication Number | Publication Date |
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| CN106124553A CN106124553A (en) | 2016-11-16 |
| CN106124553B true CN106124553B (en) | 2018-10-19 |
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| CN201610537859.5A Active CN106124553B (en) | 2016-07-08 | 2016-07-08 | A kind of novel and multifunctional frost heave test instrument |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645261B (en) * | 2017-03-17 | 2020-10-27 | 安徽理工大学 | Large-scale multifunctional manual freezing platform |
| CN108225651B (en) * | 2018-01-09 | 2023-07-04 | 石家庄铁道大学 | Test method and test device for testing tangential frost heaving force distribution of conical piles in frozen soil area |
| CN113720668B (en) * | 2021-09-22 | 2024-02-13 | 安徽理工大学 | Device for manufacturing frozen soil dynamic fracture toughness sample |
Citations (6)
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|---|---|---|---|---|
| CN202057647U (en) * | 2010-12-31 | 2011-11-30 | 任怀国 | Frost heave factor tester for soil property |
| RU2473080C1 (en) * | 2011-08-22 | 2013-01-20 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Северный (Арктический) федеральный университет имени М.В. Ломоносова" (САФУ) | Device for determining deformations and frost heaving force of soil |
| KR101285773B1 (en) * | 2010-11-29 | 2013-07-18 | 주식회사 케이엠티엘 | Measuring system of frost heaving distress on asphalt concrete pavement and construction method of pavement using the same |
| CN203287337U (en) * | 2013-06-04 | 2013-11-13 | 中国科学院寒区旱区环境与工程研究所 | Soil body freezing-thawing process visualized testing device |
| CN104655823A (en) * | 2015-02-12 | 2015-05-27 | 中南大学 | Frost heaving meter |
| CN104749209A (en) * | 2015-03-25 | 2015-07-01 | 西北农林科技大学 | Vacuum inner-container type unidirectional freezing test device for closed system |
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2016
- 2016-07-08 CN CN201610537859.5A patent/CN106124553B/en active Active
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|---|---|---|---|---|
| KR101285773B1 (en) * | 2010-11-29 | 2013-07-18 | 주식회사 케이엠티엘 | Measuring system of frost heaving distress on asphalt concrete pavement and construction method of pavement using the same |
| CN202057647U (en) * | 2010-12-31 | 2011-11-30 | 任怀国 | Frost heave factor tester for soil property |
| RU2473080C1 (en) * | 2011-08-22 | 2013-01-20 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Северный (Арктический) федеральный университет имени М.В. Ломоносова" (САФУ) | Device for determining deformations and frost heaving force of soil |
| CN203287337U (en) * | 2013-06-04 | 2013-11-13 | 中国科学院寒区旱区环境与工程研究所 | Soil body freezing-thawing process visualized testing device |
| CN104655823A (en) * | 2015-02-12 | 2015-05-27 | 中南大学 | Frost heaving meter |
| CN104749209A (en) * | 2015-03-25 | 2015-07-01 | 西北农林科技大学 | Vacuum inner-container type unidirectional freezing test device for closed system |
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| Title |
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| Differential frost heave and sorted patterned ground: field measurements and a laboratory experiment;Norikazu Matsuoka et al.;《Geomorphology》;20031231;第52卷;第73–85页 * |
| Laboratory and field testing on rate of frost heave versus heat extraction;Ake Hermansson;《Cold Regions Science and Technology》;20041231;第38卷;第137–151页 * |
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