CN110146371A - Heating and thermal insulation sleeve is loaded for large scale rock direct shear test - Google Patents
Heating and thermal insulation sleeve is loaded for large scale rock direct shear test Download PDFInfo
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- CN110146371A CN110146371A CN201910341418.1A CN201910341418A CN110146371A CN 110146371 A CN110146371 A CN 110146371A CN 201910341418 A CN201910341418 A CN 201910341418A CN 110146371 A CN110146371 A CN 110146371A
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- heating
- thermal insulation
- constant temperature
- insulation sleeve
- heat transfer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Heating and thermal insulation sleeve is loaded for large scale rock direct shear test the invention discloses a kind of; it includes rigid heating and thermal insulation sleeve body and heated constant temperature control system; rigid heating and thermal insulation sleeve body is made of material, completely identical in structure top heating muff and lower part heating muff; the innermost layer of top heating muff is heat transfer support plate; outermost layer is rigid protective sleeve, centre setting insulating；It is provided with several support columns arranged in arrays in heat transfer support plate, heating coil is provided between adjacent support column, insulating is fixed on the support columns；Heated constant temperature control system includes constant temperature controller, electric wire, temperature sensor feedback line and temperature sensor.The present invention can either transmit the shear stress of loading tester and then push rock sample two parts Relative sliding up and down, additionally it is possible to can load heating and thermal insulation to rock progress, guarantee the constant hot environment in rock sample periphery.
Description
Technical field
Heating and thermal insulation sleeve is loaded for large scale rock direct shear test the present invention relates to a kind of, especially a kind of use
Locating hot environment loads heating and thermal insulation set in large scale rock direct shear test and analog hot dry rock development process
Cylinder.
Background technique
China is that the biggish country of geothermal energy resources reserves, geothermal energy resources are stable with its high spatter property in the world
Property and spatial distribution popularity become countries in the world primary study and exploitation new cleaning fuel.3~10km of China's Mainland
Depths hot dry rock resource is about 260,000 times of the current annual energy total amount consumed of China.National geothermal energy development specially explicitly points out
Try to explore and develop every technology of hot dry rock, therefore further system research hot dry rock reservoir fracture is in Li-heat-liquid coupling
Failure by shear and crack propagation feature under cyclization border and water injection pressure, further investigation hot dry rock rock mass shear fissure form machine
System is to break through hot dry rock development technique bottleneck urgent need to resolve key technology difficulty, and the energy-saving and emission-reduction and environment to China's future are dirty
Dye is administered and the Energy restructuring of a new round has important theoretical value and practical advice meaning.
However, laboratory test heating apparatus in the prior art has the disadvantage that (1) is real using media such as hydraulic oil
Now to the heating of rock sample, however this method has ignored influence of the fluid to the mechaanical property of materials；(2) traditional direct shear test examination
The size of sample is often below 7mm, and shearing test result is difficult to react true hot dry rock rock mass.The devices such as traditional heating muff
Have the following disadvantages: (1) heating muff more application is in manufacturing industry, however the less indoor rock mechanics that is related to is tried
It tests, previous heating muff is unable to satisfy the requirement of indoor direct shear test；(2) most of heating muff often only provides heating function
Can, do not have rigidity can loading environment, i.e., cannot using heating muff transmit loading stress；(3) most of heating muff can not
Function of temperature control when realizing long.
Prior art correlative study is such as: CN207418584U discloses a kind of 3D bend glass hot bending based on high-frequency heating
Device, is mainly used for the heated fast sofening treatment of glass, and size, function are not suitable for indoor direct shear test.
CN206294035U discloses a kind of ring shaped heating mechanism, which cannot achieve the transmitting of loading stress, and then can not apply
In indoor rock mechanics experiment.
Therefore, this field related researcher be dedicated to developing it is a kind of for large scale rock direct shear test load plus
Heat heat preservation sleeve.
Summary of the invention
Heating and thermal insulation sleeve is loaded for large scale rock direct shear test the purpose of the present invention is to provide a kind of,
The shear stress of loading tester can either be transmitted and then push rock sample two parts Relative sliding up and down, additionally it is possible to rock
Progress can load heating and thermal insulation, guarantee the constant high temperature environment in rock sample periphery.
It is a kind of to load heating and thermal insulation sleeve for large scale rock direct shear test comprising rigid heating and thermal insulation sleeve
Ontology and heated constant temperature control system, the rigid heating and thermal insulation sleeve body are by material, completely identical in structure top
Heating muff and lower part heating muff composition, the innermost layer of the top heating muff is heat transfer support plate, and outermost layer is rigid
Property protection sleeve, centre setting insulating；
The heat transfer support plate is provided with four pieces, and it is arranged in arrays to be provided with several in the heat transfer support plate
Support column, be provided with heating coil between adjacent support column, the side of the heat transfer support plate it is vertical be provided with it is more
A fastening bolt holes are cooperated together by fastening bolt and fastening bolt holes between adjacent heat transfer support plate；
The insulating is fixed on the support column, the rigid protective sleeve and the thermally conductive support
Fixation is bolted by nonmetallic reinforcing between plate；
The heated constant temperature control system includes constant temperature controller, electric wire, temperature sensor feedback line and temperature sensing
Device is attached in the temperature sensor on the inside of the heat transfer support plate, passes through temperature sensor feedback line and thermostatic control
Device is connected；Heating coil is connected by the electric wire with constant temperature controller, and the constant temperature controller is connected with power supply.
As a preferred solution of the present invention, the maximum of the rock in top heating muff, lower part heating muff
Having a size of 200mm × 200mm × 150mm.
As another preferred embodiment of the invention, above-mentioned heating coil is made by chromium silk, above-mentioned fastening spiral shell
Bolt is metal material.
A kind of application method for loading heating and thermal insulation sleeve for large scale rock direct shear test successively includes following
Step:
A, the concrete inclusion enclave made or protolith sample are placed in the heating muff of lower part, later in lower part heating mantle
Cylinder top disposes top heating muff；
B, the assembled heating and thermal insulation sleeve that loads is placed in direct shear test machine, pressure head of testing machine contact can load
Heating and thermal insulation sleeve simultaneously applies certain external load；
C, test temperature required for being adjusted in constant temperature controller, and the switch of constant temperature controller is opened；
D, manipulation direct shear test machine carries out direct shear test, record and collection test data, expands in conjunction with test data and crackle
Spread formula discloses shear fissure Dynamic Evolution Characteristics and sliding rupture mechanism.
Compared with prior art, present invention offers following advantageous effects:
The first, using compression strength, high, impact water in corrosion resistance is good and with the thermally conductive of certain thickness high density steel manufacture
Support plate and rigid protective sleeve are the main body of device, and the top heating muff and lower part heating muff directly contact shearing test
For transmitting shear stress sliding can be achieved between the heating muff of top and the bottom, and then meet the rigidity of rock sample in the pressure head of machine
Shearing test.
The second, top heating muff and lower part heating muff is internally provided with high frequency heating coil, so as to by rock
Sample is brought rapidly up and guarantees to be heated evenly, meanwhile, insulating and heated constant temperature control system can guarantee that rock sample exists
Whole experiment process keeps constant temperature.
Third, the present invention can load heating and thermal insulation sleeve and can either transmit the shear stress of loading tester and then push rock
Two parts Relative sliding above and below stone test specimen, additionally it is possible to heating and thermal insulation can be loaded to rock progress, guarantee that rock sample periphery is constant
High temperature environment, maximum temperature reaches 300 degrees Celsius, while the direct shear test to large dimension specimen may be implemented, maximum ruler
Very little 200mm × 200mm × 300mm better reflects rock shear fissure dynamic evolution when underground is broken by complex external force
Feature and sliding rupture feature.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is a kind of structural representation for loading heating and thermal insulation sleeve for large scale rock direct shear test of the present invention
Figure；
Fig. 2 be top of the present invention, lower part heating muff A-A` line cross-sectional view；
Fig. 3 is the structural schematic diagram of heat transfer support plate of the present invention；
Fig. 4 is the structural schematic diagram of insulating of the present invention；
Fig. 5 is top of the present invention, lower part heating muff and test sample entirety installation diagram.
Appended drawing reference is as follows:
The top 1- heating muff；11- heat transfer support plate；111- support column；12- high frequency heating coil；13- heat-insulation and heat-preservation
Layer；14- rigid protective sleeve；15- fastening bolt；151- fastening bolt holes；16 nonmetallic reinforcing bolts；161- reinforces bolt
Hole；The lower part 2- heating muff；3- constant temperature controller；4- electric wire；5- temperature sensor feedback line；6- temperature sensor；7- coagulation
Native inclusion enclave；8- protolith sample.
Specific embodiment
Heating and thermal insulation sleeve is loaded for large scale rock direct shear test the invention proposes a kind of, in order to make this hair
Bright advantage, technical solution are clearer, clear, elaborate combined with specific embodiments below to the present invention.
In conjunction with shown in Fig. 1 to Fig. 5, the present invention is a kind of to load heating and thermal insulation set for large scale rock direct shear test
Cylinder, including top heating muff 1, lower part heating muff 2, top heating muff, lower part heating muff are prepared by identical material
It forms, assembling structure, function are identical.
Top heating muff 1 includes heat transfer support plate 11, high frequency heating coil 12, insulating 13, rigid protective set
Cylinder 14, fastening bolt 15, nonmetallic reinforcing bolt 16, wherein heat transfer support plate 11 is located at innermost layer, and 14, rigid protective sleeve
It is therebetween insulating 13 in outermost layer, heat transfer support plate 11 is provided with support column 111, fastening bolt holes 151, adds
Fixing bolt hole 161, wherein the horizontally-arranged vertical setting of types permutation matrix shape of support column 11, heat transfer support plate 11 totally 4 pieces and each other before using tight
15 fixing seal of fixing bolt；High frequency heating coil 12 is arranged between support column 111；Insulating 13 is fixed on support column
111 tops；Rigid protective sleeve 14 is arranged in 13 totally 4 pieces of top of insulating, and rigid protective sleeve 14 is added using nonmetallic
Fixing bolt 16 is connected and fixes with heat transfer support plate 11.
Heated constant temperature control system includes constant temperature controller 3, electric wire 4, temperature sensor feedback line 5, temperature sensor 7.
It is attached to 11 inside of heat transfer support plate in temperature sensor 6, is connected by temperature sensor feedback line 5 with constant temperature controller 3；Electricity
High frequency heating coil 12 is connected by line 4 with constant temperature controller 3；Constant temperature controller 3 is controlled to a power supply.
Heat transfer support plate 11 and rigid protective sleeve 14 are high using compression strength, impact water in corrosion resistance is good and has certain thickness
High density steel manufacture；High frequency heating coil 12 is nickel filament production；Fastening bolt 15 is metal material；Nonmetallic reinforcing spiral shell
Bolt 16 is non-metallic material；Temperature sensor 6 is the production of high temperature resistant material.
Using apparatus above, test can be followed the steps below:
(1) test material preparation
Large scale protolith sample: it will be sealed from fetch protolith sample of scene with preservative film and be placed in corning machine and take
The protolith careful of taking-up is finally polished into raw coal cube rock sample using grinding machine by core, cube rock sample having a size of
200mm × 200mm × 300mm, by the protolith to complete be placed in constant temperature, constant humidity curing box in conserve.
Small size protolith sample and large-size concrete inclusion enclave: C30 concrete is prepared, wherein water, cement, sand and stone
Mass ratio be 0.38:1:1.11:2.72, prepared concrete is placed in the double die sinkings of 200mm × 200mm × 150mm
It is consolidated in tool, by the protolith sample to complete (being less than 150mm × 150mm × 150mm, be greater than 70mm × 70mm × 70mm) peace
It is placed in the middle part of concrete, while guaranteeing in cube rock sample half insertion concrete；10mm backing plate is placed above double molds,
It is placed in the double molds of 200mm × 200mm × 150mm above backing plate, and pours into concrete and is consolidated；It is cut to concrete
Cutting block forming by the concrete shearing block made be placed in constant temperature, constant humidity curing box in conserve.
(2) assembling of equipment
Top heating muff 1 and lower part heating muff 2 include heat transfer support plate 11, high frequency heating coil 12, heat-insulation and heat-preservation
Layer 13, rigid protective sleeve 14, fastening bolt 15, nonmetallic reinforcing bolt 16.Heat transfer support plate 11 be provided with support column 111,
Fastening bolt holes 151, reinforce bolt hole 161, heat transfer support plate 11 totally 4 pieces and each other using fastening bolt 15 fixation it is close
Envelope；High frequency heating coil 12 is arranged between support column 111；Insulating 13 is fixed on 111 top of support column；Rigid protective
Sleeve 14 is arranged in 13 totally 4 pieces of top of insulating, and rigid protective sleeve 14 utilizes nonmetallic reinforcing bolt 16 and thermally conductive branch
Fagging 11 is connected and fixes.
Heated constant temperature control system includes constant temperature controller 3, electric wire 4, temperature sensor feedback line 5, temperature sensor 6.
It is attached to 11 inside of heat transfer support plate in temperature sensor 6, is connected by temperature sensor feedback line 5 with constant temperature controller 3；Electricity
High frequency heating coil 12 is connected by line 4 with constant temperature controller 3；Constant temperature controller 3 is controlled to a power supply.
(3) test specimen installation and test
The concrete inclusion enclave 7 made or protolith sample 8 are placed in lower part heating muff 2, heated later in lower part
Top heating muff 1 is installed above sleeve 2；
Assembled heating muff is placed in direct shear test machine, pressure head of testing machine contact rigid protective sleeve 14 is simultaneously applied
Add certain external load；
Constant temperature controller 3 is connected to power supply, test temperature (such as 200 DEG C) required for being adjusted in constant temperature controller 3,
And thermostat is opened；
Direct shear test machine is manipulated, direct shear test, record and collection test data are carried out, in conjunction with test data and crack propagation
Form discloses shear fissure Dynamic Evolution Characteristics and sliding rupture mechanism
It uses for reference the prior art and can be realized in the part that the present invention does not address.
It should be understood that any equivalent way that those skilled in the art are made under the introduction of this specification, or
Obvious variant should all be within the scope of the present invention.
Claims (4)
1. a kind of load heating and thermal insulation sleeve for large scale rock direct shear test comprising rigid heating and thermal insulation sleeve sheet
Body and heated constant temperature control system, it is characterised in that:
The rigid heating and thermal insulation sleeve body is by material, completely identical in structure top heating muff and lower part heating muff
Composition, the innermost layer of the top heating muff are heat transfer support plate, and outermost layer is rigid protective sleeve, and centre setting is heat-insulated
Insulating layer；
The heat transfer support plate is provided with four pieces, several branch arranged in arrays are provided in the heat transfer support plate
Dagger is provided with heating coil between adjacent support column, the side of the heat transfer support plate it is vertical be provided with it is multiple tight
Fixing bolt hole is cooperated together by fastening bolt and fastening bolt holes between adjacent heat transfer support plate；
The insulating is fixed on the support column, the rigid protective sleeve and the heat transfer support plate it
Between fixation is bolted by nonmetallic reinforcing；
The heated constant temperature control system includes constant temperature controller, electric wire, temperature sensor feedback line and temperature sensor, institute
It is attached in the temperature sensor stated on the inside of the heat transfer support plate, is connected by temperature sensor feedback line with constant temperature controller
It connects；Heating coil is connected by the electric wire with constant temperature controller, and the constant temperature controller is connected with power supply.
2. it is according to claim 1 it is a kind of load heating and thermal insulation sleeve for large scale rock direct shear test, it is special
Sign is: the full-size of the rock in top heating muff, lower part heating muff is 200mm × 200mm × 150mm.
3. it is according to claim 2 it is a kind of load heating and thermal insulation sleeve for large scale rock direct shear test, it is special
Sign is: the heating coil is made by chromium silk, and the fastening bolt is metal material.
4. according to claim 1 to 3 a kind of making for heating and thermal insulation sleeve is loaded for large scale rock direct shear test
With method, which is characterized in that successively the following steps are included:
A, the concrete inclusion enclave made or protolith sample are placed in the heating muff of lower part, later on the heating muff of lower part
Side's placement top heating muff；
B, the assembled heating and thermal insulation sleeve that loads is placed in direct shear test machine, pressure head of testing machine contact can load heating
Heat preservation sleeve simultaneously applies certain external load；
C, test temperature required for being adjusted in constant temperature controller, and the switch of constant temperature controller is opened；
D, manipulation direct shear test machine carries out direct shear test, record and collection test data, in conjunction with test data and crack propagation shape
Formula discloses shear fissure Dynamic Evolution Characteristics and sliding rupture mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910341418.1A CN110146371A (en) | 2019-04-26 | 2019-04-26 | Heating and thermal insulation sleeve is loaded for large scale rock direct shear test |
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|---|---|---|---|
| CN201910341418.1A CN110146371A (en) | 2019-04-26 | 2019-04-26 | Heating and thermal insulation sleeve is loaded for large scale rock direct shear test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749513A (en) * | 2019-11-20 | 2020-02-04 | 清华大学 | Direct shear test device for rock fracture |
| CN110823720A (en) * | 2019-11-20 | 2020-02-21 | 清华大学 | Direct shear test method for natural cemented filling rock fracture under high temperature condition |
| CN116040966A (en) * | 2023-01-17 | 2023-05-02 | 东华大学 | Glass chemical strengthening method by using heat high pressure treatment |
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