CN106370815A - Method for controlling dryness and humidity of salt expansion test - Google Patents
Method for controlling dryness and humidity of salt expansion test Download PDFInfo
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- CN106370815A CN106370815A CN201610824404.1A CN201610824404A CN106370815A CN 106370815 A CN106370815 A CN 106370815A CN 201610824404 A CN201610824404 A CN 201610824404A CN 106370815 A CN106370815 A CN 106370815A
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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
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
Abstract
The invention discloses a method for controlling dryness and humidity of a salt expansion test. According to the method, a salt expansion tester is used for carrying out the salt expansion test. The method is characterized in that a pipeline connected with a water source is connected into a salt expansion tester inner cylinder and is used for controlling humidification of sample soil, and a pipeline connected with an air source is connected into an air drying unit arranged on the inner wall of the salt expansion tester inner cylinder and is used for controlling air drying of the sample soil during test. The method is capable of controlling more environment parameters and improving test simulation effect, has the advantages of simplicity in implementation, high test accuracy, flexible and adjustable in sample parameters and various test manners, and is extremely applicable to the study of properties of saline soil.
Description
Technical field
The present invention relates to salting earth salt swollen harm research field tests humidity control method and in particular to a kind of salt is swollen.
Background technology
Salinized soil isSolonchakWithAlkaline earthAnd various salinization,Alkali-affected soilGeneral name.Solonchak refers to soluble-salt in soil
Content reaches notable harm to plant growthGreat soil group.Salt content index is different because different salt are grouped into.Alkaline earth refers to soil
The volume exchangeable sodium containing harm plant growing in earth and changing soil property.Salinized soil be mainly distributed on inland arid,Half Arid area, coastal region is also distributed.About 897.0 ten thousand square kilometres of whole world salinized soil area meter, accounts for world land total
The 6.5% of area, accounts for the 39% of the arid biogeographic zone gross area.Chinese salinized soil area there are about more than 20 ten thousand square kilometres, accounts for the total face in territory
Long-pending 2.1%.The salt of salinized soil is swollen to lead to ground tympanites, cause the constructure grounds such as highway, airport, house to produce bulge, open
The engineering disease such as split；The engineerings such as the road in NORTHWEST CHINA area, pipeline, transmission of electricity, airport, Fang Jian all relate generally to salting earth salt
Distension syndrome does harm to problem.Therefore the research for salinized soil has realistic meaning for the building construction of saline soil area very much.
Solve the salt distension syndrome evil of salinized soil, the most basic be intended to understand the swollen machine of salting earth salt by the swollen experimental study of salt
Reason, influence factor and its affecting laws.Salt is swollen, and test is carried out using the swollen tester of salt.At present, the swollen tester of existing salt is also deposited
In following more deficiency: 1. can only do the swollen test of the salt under temperature (freeze-thaw cycle, thermograde) and load action it is impossible to realize
The swollen test of water content continually varying drying and watering cycle salt under constant temperature is it is impossible to realize freeze-thaw cycle and drying and watering cycle coupling under load action
The swollen test of salt closed；2. function is simple, and integration degree is low；3. adopt integrally-built sample bucket, and salt swollen test sample chi
Very little highly larger, the sample bucket constraint swollen to the vertical salt of sample during test substantially, leads to result of the test substantially less than normal；4. test bucket
Highly certain, lead to specimen height size adjusting limited.
Therefore, how to improve further the swollen test of salt detection function, improve the swollen test of salt detection research effect, to
Preferably the swollen mechanism of salt, influence factor and its affecting laws for studying salinized soil provide technical conditions, become this area and need
The problem considering.
Content of the invention
For above-mentioned the deficiencies in the prior art, the technical problem to be solved is: how to provide one kind real
Now more environment parameter controls, improve test simulation effect, improve test accuracy, facilitate the salt swollen test dry and wet of sample adjustment
Degree control method.
In order to solve above-mentioned technical problem, present invention employs following technical scheme: the equipment that is based in the application uses
State carries out orientation description.
A kind of salt swollen test humidity control method, carries out the swollen test of salt, its feature using the swollen tester of salt in this method
It is, during test, be connected into, inside salt swollen tester inner core, sample soil being entered by the pipeline relying on and water source connects
Row humidification controls, and relies on the pipeline connecting with wind regime to be connected into the air-dried list of setting on tube inner chamber inwall in the swollen tester of salt
In unit, sample soil is carried out air-dry control.
So, the control to sample humidity when this method can quickly and easily be realized testing, and then realize under constant temperature
Test that water content continually varying drying and watering cycle salt is swollen, helps realize salinized soil is more comprehensively researched and analysed.
As optimization, this method is carried out using the following swollen tester of salt, and salt is swollen, and tester includes sample bucket and temperature tune
Control system, sample bucket includes outer barrel and the inner core being arranged in outer barrel, and outer barrel is vertically installed on sample gantry, temperature adjusting system
System includes one circulation fluid temperature control equipment a, circulation fluid temperature control equipment a pass through circulation fluid pipeline and outer barrel and inner core it
Between the circumferential circulation fluid chamber circulation connection that constitutes of gap it is characterised in that also including for realization, inner core pilot scale sample being done
The sample humidity control system of humid control.
Described sample humidity control system includes a container that adds water being arranged at outside sample bucket, and the container that adds water passes through
Pipeline is connected to inner tank theca and inner core inner space.The water that so can realize weighing needed for test is added to the container that adds water
Interior, then control and enter in interior tube inner chamber, realize the adjustment to sample humidity and control.Preferably, the container that adds water is using peace
Shelve be arranged on position higher than sample bucket top with facilitate carry out adding water by current deadweight moistening.The container that further adds water arrives
It is provided with water adjusting valve, to facilitate control to add water speed, it is to avoid adding water too fast leads to humidity uneven on pipeline between sample bucket
And affect result of the test.
Wherein said sample humidity control system also includes an air compressor machine, and air compressor machine outlet side is by gas pipeline even
It is connected to a temperature control expansion box, temperature control expansion box is provided with the expansion box attemperating unit realizing internal temperature control, temperature control is stored up
Gas tank gas outlet is connected to by gas pipeline in the air dried cell being arranged at inner core inwall, is provided with gas outlet in air dried cell
And be connected to outside sample bucket by outlet pipe.
As such, it is possible to air be pressed in temperature control expansion box by air compressor machine, air adjustment is to meet needed for test
After air pressure and temperature, it is re-fed in the air dried cell of inner core inwall, the sample in internal tube inner chamber is air-dried, to control
Its humidity changes, and sample humidity is better achieved and controls simulation, improve test simulation effect.Further, air compressor machine goes out
It is provided with gas pressure regulator, for controlling the gas within temperature control expansion box on gas pipeline between gas end and temperature control expansion box
Pressure.Its air pressure constant can be made to ensure to air-dry requirement in 10kpa～30kpa, and do not destroy soil sample structure.
As optimization, described temperature control expansion box is provided with a circulation fluid interlayer, circulation fluid interlayer passes through pipeline and
Individual circulation fluid temperature control equipment c circulation connection.So, the air in temperature control expansion box is controlled to reach examination during test by circulation fluid
Temperature needed for sample, it is to avoid air themperature and the inconsistent impact to test accuracy of specimen temperature.
Further, temperature control expansion box includes outer case and interior case, interior one lateral surface of case and one medial surface of outer case
Fitting, fixing and air compressor machine outlet side is communicated to interior case by this side, and remaining side and upper bottom surface vacantly arrange and constitute
Circulation fluid interlayer, is provided with support I-steel between interior case bottom surface and outer case inner bottom surface.This spline structure is more reasonable, convenient
The installation arranging and facilitating gas pipeline interface of circulation fluid interlayer.Further, it is provided with the circulation of the coiling in s shape in interior case
Liquid coil pipe, circulation fluid coil pipe two ends are passed through pipeline and are connected with described circulation fluid temperature control equipment c circulation.As such, it is possible to more preferably
The effective control to temperature control gas storage the temperature inside the box is realized on ground.
As optimization, described air dried cell includes the annular groove being circumferentially disposed on inner core inwall, annular groove groove
The closing of mouthful position is provided with a circle baffle plate, and baffle plate offers some passages, formed between baffle plate and annular groove for
The ventilating layer of gas pipeline connection.
So, the structure of this air dried cell, can realize air-drying, simultaneously and not of the sample in internal tube inner chamber well
Can interfere with sample itself test process it is ensured that result of the test accurately and reliably.
Further, baffle surface is provided with grenadine, so can be better protected from sample blocking passage it is also possible to keep away
Be excused from an examination sample enter passage and affect test accuracy.Further baffle plate adopts soft plastic board and inner surface and inner core surface of internal cavity
Unanimously；Can conveniently realize installing and seal, preferably to reduce the impact to test.Yet further, fill in ventilating layer
It is provided with sand grains, sand grains can ensure that and can avoid soft plastic board indent well while ventilation drying effect it is ensured that baffle plate
Inwall profile is consistent with inner core surface of internal cavity, at utmost reduces the impact to test accuracy.Adopt 1 millimeter as preferred sand grains
The homogeneous sand grains of particle diameter, so that the effect above reaches most preferably.
As optimization, interior tube inner chamber top face has been disposed adjacent a top circulation fluid chamber, top circulation fluid chamber
Setting is connected with described circulation fluid temperature control equipment a circulation by circulation fluid pipeline；Interior tube inner chamber subjacent is disposed adjacent
There is a bottom cycle sap cavity room, bottom cycle sap cavity room is followed by circulation fluid pipeline and a circulation fluid temperature control equipment b
Ring connection setting.
So, inner core top and bottom can respectively by the circulation fluid of different temperatures, realize thermograde control so that
More preferably simulation can be there is the actual environment situation of the temperature difference by earth's surface downward different buried depth stratum during specimen test, improve test
Simulation effect, improves test accuracy, salt expandability to salinized soil is better achieved can be studied.
As optimization, it is provided with top cover at interior tube inner chamber top surface, tube inner chamber top surface in top cover lower surface composition, inside top cover
Hollow setting forms top circulation fluid chamber, and lid periphery forms can slide up and down with interior tube inner chamber perisporium and contacts, on top cover
Vertically it is provided through temperature sensor fixing hole and humidity sensor installing hole, temperature sensor fixing hole is used for installing temperature
Sensor simultaneously makes the display portion of temperature sensor be exposed to above sample bucket, and humidity sensor installing hole is used for installing humidity
Sensor simultaneously makes humidity sensor be exposed to above sample bucket；Be additionally provided with above top cover for detect top cover move up away from
From instrumentation.
So adopt top cover simultaneously as the basis of setting top circulation fluid chamber, and realize salting soil expansion detection
Basis, has structure simply, the advantages of easy to detect, can also conveniently arrange temperature sensor and humidity sensor with anti-simultaneously
Feedback detection salinized soil internal temperature and humidity condition it is ensured that in process of the test state modulator accurate reliability.
As optimization, instrumentation is electronic centigrade scale and is fixed on sample gantry, electronic centigrade scale lower end is touched
Head and top cover upper surface contact；Can ensure that the accuracy of accuracy of detection.
As optimization, above top cover, it is additionally provided with the load simulating device for top cover is applied with downward pressure.
As such, it is possible to dependence load simulating device, realize the load simulation to salinized soil, realize freeze thawing under load action and follow
The swollen test of salt that ring is coupled with drying and watering cycle.Improve test simulation effect, improve to salinized soil performance study analysis ability.
As optimization, described load simulating device, including the dowel steel arranging straight up positioned at top cover upper surface,
Also include one to be horizontally disposed with and lever beam above dowel steel for the apical grafting, lever beam one end is support end and support end upper surface
Spacing by lever position-limit mechanism, for loading end and loading end is provided with counterweight loading disc to the lever beam other end.So, by lever
Mode load negative pressure, one is the size amplifying load by lever principle, and two is can preferably to keep load in process of the test
Power size constant, with ensure dead load simulation effect.Further, lever position-limit mechanism includes one and is horizontally placed on lever beam
The fulcrum beam of top, fulcrum beam spins by screw thread and is vertically provided with a regulating bolt, regulating bolt lower end and lever beam connect
Touch and form fulcrum.As such, it is possible to regulation to lever level be better achieved it is ensured that the calculating of carrying accurately and keeps loading
Steadily constant.Further, the upper surface of lever beam loading end is additionally provided with air level, can preferably judge to adjust lever beam
Level.Further, lever beam and regulating bolt lower end contact position and and dowel steel tip contact at be male-female engagement
Spherical structure.As such, it is possible to be accurately positioned out force application location it is ensured that load loads effect.Yet further, counterweight loading disc
The vertical peg that top surface middle part upwardly extends formation is articulated in a hook in the middle part of peg beam loading end lower surface
On.So ensure that the counterweight weight loading is concentrated to be applied on a point of lever beam, beneficial to the essence improving load simulation calculating
Degree.Yet further, in the middle part of top cover inner chamber, corresponding dowel steel position also has the connector that the entirety being vertically connected with is in taper type,
To better ensure that the load pressure being delivered to sample top surface as evenly load.
As optimization, at interior tube inner chamber bottom surface, it is provided with bottom, bottom upper surface forms interior tube inner chamber bottom surface, inside bottom
Hollow setting forms bottom cycle sap cavity room, and bottom periphery forms can slide up and down with interior tube inner chamber perisporium and contacts, under bottom
Side is provided with the bottom height adjustment mechanism being capable of the regulation of bottom height and position.
So, by bottom as salinized soil holding members and bottom cycle sap cavity room basic component, simple and reliable for structure,
Bottom can slide up and down and height adjustment mechanism can be leaned on to adjust so as to the adjustment of specimen height can conveniently be realized, and improves examination
Test effect.
As optimization, described bottom height adjustment mechanism includes a height adjustment bolt, and height adjustment bolt vertically sets
Put and screw thread spins cooperation in the middle screw thread in the hole of sample bottom of the barrel, height adjustment bolt upper end is rotatably engaged by bearing
It is connected on bottom, height adjustment bolt lower end is provided with altitude mixture control handle.
As such, it is possible to convenient pass through the adjustment to specimen height for the rotation height regulation handle realization, structure is simple, adjustment side
Just fast reliable.
Further, bottom height adjustment mechanism, also includes one and height adjustment bolt spaced scale side by side
Chi, rule is fixed on sample gantry, and height adjustment bolt lower section is additionally provided with an altitude location chi, altitude location
Chi one end can slide up and down to spacing cooperation on the scale, the other end lean on a bearing being fixed in height adjustment bolt with
Height adjustment bolt is rotatably connected.As such, it is possible to more easily directly observed reading obtains bottom regulation height, enter
And obtain specimen height.
Further, outer barrel include cylindrical shape outer barrel body and be located at outer barrel body bottom portion an entirety in the form of annular discs
Collet, in the middle part of collet setting and height adjustment bolt cooperation screwed hole, collet is additionally provided with two circulation fluid pipeline mistakes
Hole and escape pipe via, collet upper surface is coaxially arranged with two circle draw-in grooves, each clamping seal solid of outer barrel body and inner core
It is scheduled in corresponding draw-in groove.So, there is structure simple, the advantage of installation convenient for assembly.
Further, outer barrel also includes a sample bucket capping positioned at outer barrel body upper end, and sample bucket covers level side
To projection be in that interior tube inner chamber is exposed at annular and middle part, sample bucket covers lower surface and outer barrel body upper end and inner core upper end
Any one is sealedly and fixedly connected and (so that it is not integrally affected interior with another one for the embedded grafting cooperation that can slide up and down
Cylinder vertically movable)；Interface for accessing the container conduit that adds water the connecting tube by inside are provided with the capping of sample bucket
Road is connected to interior tube inner chamber, the capping of sample bucket is additionally provided with the interface of gas pipeline for accessing temperature control expansion box and passes through
Internal connecting pipe is connected to air dried cell.So there is structure simply, the advantage installed with pipe arrangement convenient for assembly.
As improving further, described inner core is spliced by multiple interior shell rings vertically and obtains, between adjacent inner barrel section by under
In side, a shell ring upper surface taper type structure upwards is inserted into shell ring lower surface corresponding taper hole shape respective outer side edges in top
Be connected, and in lower end, shell ring do not constrain shell ring in upper end and moves up, at cooperation between adjacent inner barrel section outside be provided with sealing
Film is used for completely cutting off the circumferential circulation fluid chamber outside fit clearance and inner core.So make in the swollen process of the test of salt, at utmost
Reduce the constraint of the inner core inwall suffered by axial expansion of sample, substantially reduce the shadow to the vertical swell increment of sample for the interior bucket inwall
Ring, drastically increase test accuracy.
As a kind of version of diaphragm seal, can be using elastica and to be provided separately within the interior shell ring of adjacent two
At cooperation, such consumptive material is less.Can also be using the cylindrical shape diaphragm seal surrounding whole inner core peripheral surface, so can be more
Ensure well sealing effectiveness and reduce the effect of constraint value to the vertical expansion of sample for the diaphragm seal itself.Preferably diaphragm seal upper and lower two
End be fixed in the inwall upper and lower ends of outer barrel, make circulation fluid circulate in outer barrel inwall with sealing intermembranous, so sample will be erected
It is preferably minimized to the impact expanding.
As optimizing further, shell ring in each is all correspondingly arranged at least one air dried cell and at least circumference is upper all
Four of even arrangement are used for the water inlet that sample is added water.So can more preferably and more uniformly improve humidity control effect.
As optimization, described circulation fluid temperature control equipment a, circulation fluid temperature control equipment b and circulation fluid temperature control
Device c, all using High Precision Low Temperature groove, has temperature control conveniently, the high advantage of control accuracy.
In sum, the present invention is capable of more environment parameter controls, improves test simulation effect, has enforcement letter
Single, test accuracy is high, and sample parameter is flexibly adjustable, can advantage more than test method, be highly suitable for salinized soil performance
Research.
Brief description:
Fig. 1 is the structural representation of the swollen tester of salt adopting in embodiment of the present invention.
Fig. 2 is the cross section structure diagram of independent temperature control expansion box in Fig. 1.
Fig. 3 is the structural representation of independent sample barrel section in Fig. 1.
Fig. 4 is the structural representation of independent water adjusting valve in Fig. 1.
Fig. 5 is the structural representation of independent inner cylindrical portion in Fig. 1.
Fig. 6 is the structural representation of independent collet part in Fig. 1.
Fig. 7 is the structural representation of independent header field in Fig. 1.
Fig. 8 is the structural representation of independent bottom cover member in Fig. 1.
Fig. 9 is the part-structure schematic diagram of independent two interior shell rings in Fig. 1.
Figure 10 is the structural representation of independent gas pressure regulator part in Fig. 1.
Figure 11 is the structural representation that can show sample bucket cover portion in Fig. 1.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Optimum embodiment: a kind of salt swollen test humidity control method, in this method, salt is carried out using the swollen tester of salt
Swollen test, its feature is, during test, is connected in salt swollen tester inner core by the pipeline relying on and water source connects
Face, carries out to sample soil humidifying control, relies on and the pipeline of wind regime connection is connected in tube inner chamber in the swollen tester of salt
In the air dried cell of setting on wall, sample soil is carried out air-dry control.
So, the control to sample humidity when this method can quickly and easily be realized testing, and then realize under constant temperature
Test that water content continually varying drying and watering cycle salt is swollen, helps realize salinized soil is more comprehensively researched and analysed.
In this specific embodiment, this method is carried out using the swollen tester of salt of structure as shown in figs. 1-11, examination that this salt is swollen
Test instrument, including sample bucket and temperature regulation system, sample bucket includes outer barrel 18 and the inner core being arranged in outer barrel, and outer barrel 18 is vertical
It is arranged on sample gantry 13, temperature regulation system includes a circulation fluid temperature control equipment a6, circulation fluid temperature control fills
Put a6 to pass through the circumferential circulation fluid chamber that between circulation fluid pipeline and outer barrel and inner core, gap is constituted and circulate to connect, also include for
Realize the sample humidity control system that the humidity to inner core pilot scale sample controls.
This swollen tester of sample salt, when using, is capable of more ambient parameter simulations, it is possible to achieve sample is done
The control of humidity, and then realize the swollen test of water content continually varying drying and watering cycle salt under constant temperature, help realize to salinized soil more
Plus comprehensively research and analyse.
In present embodiment, described sample humidity control system includes a container that adds water being arranged at outside sample bucket
4, the container 4 that adds water is connected to inner tank theca and inner core inner space by pipeline.So can realize weighing needed for test
Water is added to and adds water in container 4, then controls and enters in interior tube inner chamber, realizes the adjustment to sample humidity and controls.During enforcement,
The container 4 that adds water adopt installing rack 23 be arranged on position higher than sample bucket top with facilitate carry out adding water by current deadweight moistening.
Further add water and be provided with water adjusting valve 27 on the pipeline between sample bucket for the container, to facilitate control to add water speed, it is to avoid plus
Water is too fast to be led to humidity uneven and affects result of the test.
Wherein, described sample humidity control system also includes an air compressor machine 5, and gas tube is passed through in air compressor machine 5 outlet side
Road is connected to a temperature control expansion box 2, and temperature control expansion box 2 is provided with the expansion box attemperating unit realizing internal temperature control,
Temperature control expansion box gas outlet is connected to by gas pipeline in the air dried cell being arranged at inner core inwall, is provided with air dried cell
Gas outlet is simultaneously connected to outside sample bucket by outlet pipe 33.Air compressor machine is preferably the pneumatics of the no hot absorption drier of band
Machine.
As such, it is possible to dried air be pressed in temperature control expansion box by air compressor machine, air adjustment is to meet examination
After testing required air pressure and temperature, it is re-fed in the air dried cell of inner core inwall, the sample in internal tube inner chamber enters sector-style
Dry, to control its humidity to change, sample humidity is better achieved and controls simulation, improve test simulation effect.Further,
Gas pressure regulator 40 is provided with the gas pipeline between air compressor machine outlet side and temperature control expansion box, for controlling temperature control expansion box
Internal air pressure.Its air pressure can be made to keep being scheduled between 10kpa～30kpa, to ensure to air-dry requirement, and do not destroy soil sample
Structure.During enforcement further, temperature control expansion box 2 is additionally provided with gas storage temperature sensor 1, is used for realizing temperature control expansion box 2
The detection of interior air themperature is with conveniently regulating and controlling.
Wherein, described temperature control expansion box is provided with a circulation fluid interlayer, circulation fluid interlayer is followed by pipeline and one
Ring liquid temp control device c8 circulation connection.So, to control the air in temperature control expansion box to reach examination during test by circulation fluid
Sample is temperature required, it is to avoid air themperature and the inconsistent impact to sample precision of sample.
Wherein, temperature control expansion box includes outer case 3 and interior case 10, interior 10 1 lateral surface of case and 3 one inner sides of outer case
Face fits, and fixing and air compressor machine outlet side is communicated to interior case by this side, and remaining side and upper bottom surface are vacantly arranged and structure
Become circulation fluid interlayer, between interior case 10 bottom surface and outer case 3 inner bottom surface, be provided with support I-steel 12.This spline structure more closes
Reason, the setting facilitating circulation fluid interlayer and the installation facilitating gas pipeline interface.Further, it is provided with interior case in s shape disk
Around circulation fluid coil pipe 11, circulation fluid coil pipe 11 two ends are passed through pipeline and described circulation fluid temperature control equipment c8 circulation and are connected.
As such, it is possible to effective control to temperature control gas storage the temperature inside the box is better achieved.
Wherein, described air dried cell includes the annular groove being circumferentially disposed on inner core inwall, annular groove notch position
Put closing and be provided with a circle baffle plate 38, baffle plate 38 offers some passages, formed between baffle plate and annular groove for
The ventilating layer 36 of gas pipeline connection.
So, the structure of this air dried cell, can realize air-drying, simultaneously and not of the sample in internal tube inner chamber well
Can interfere with sample itself test process it is ensured that result of the test accurately and reliably.
Wherein, baffle surface is provided with grenadine 37, so can be better protected from sample blocking passage it is also possible to avoid
Sample enters passage and affects test accuracy.Further soft plastic board and inner surface and interior can also be adopted by baffle plate during enforcement
Tube inner chamber surface is consistent；Can conveniently realize installing and seal, preferably to reduce the impact to test.Yet further, lead to
It has been filled with sand grains, sand grains can ensure that and can avoid in soft plastic board well while ventilation drying effect in stratification of wind 36
Recessed it is ensured that baffle inner wall profile is consistent with inner core surface of internal cavity, at utmost reduce the impact to test accuracy.As preferred sand
Grain adopts homogeneous sand grains or the high rigidity sand grains (as normal sand sand grains) of 1 millimeter of particle diameter, so that the effect above reaches most preferably.
Wherein, interior tube inner chamber top face has been disposed adjacent a top circulation fluid chamber, and top circulation fluid chamber passes through
Circulation fluid pipeline connects setting with described circulation fluid temperature control equipment a6 circulation；Interior tube inner chamber subjacent has been disposed adjacent one
Individual bottom cycle sap cavity room, circulation fluid pipeline is passed through in bottom cycle sap cavity room and a circulation fluid temperature control equipment b7 circulation connects
Logical setting.
So, inner core top and bottom can respectively by the circulation fluid of different temperatures, realize thermograde control so that
More preferably simulation can be there is the actual environment situation of the temperature difference by earth's surface downward different buried depth stratum during specimen test, improve test
Simulation effect, improves test accuracy, salt expandability to salinized soil is better achieved can be studied.
Wherein, it is provided with top cover 32 at interior tube inner chamber top surface, tube inner chamber top surface in top cover 32 lower surface composition, in top cover 32
Portion's hollow setting forms top circulation fluid chamber, and lid periphery forms can slide up and down with interior tube inner chamber perisporium and contacts, top cover
On be vertically provided through temperature sensor fixing hole 32-3 and humidity sensor installing hole 32-4, temperature sensor fixing hole is used
In installing sample temperature sensor 16 and so that the display portion of sample temperature sensor 16 is exposed to above sample bucket, wet
Degree sensor mounting hole is used for installing humidity sensor 25 and so that humidity sensor 25 is exposed to above sample bucket；Above top cover
It is additionally provided with for detecting that top cover moves up the instrumentation 26 of distance.
So adopt top cover simultaneously as the basis of setting top circulation fluid chamber, and realize salting soil expansion detection
Basis, has structure simply, the advantages of easy to detect, can also conveniently arrange temperature sensor and humidity sensor with anti-simultaneously
Feedback detection salting soil sample internal temperature and humidity condition it is ensured that in process of the test state modulator accurate reliability.
Wherein, instrumentation 26 is electronic centigrade scale and is fixed on sample gantry, electronic centigrade scale lower end contact
Contact with top cover upper surface；Can ensure that the accuracy of accuracy of detection.
Wherein, it is additionally provided with the load simulating device for top cover is applied with downward pressure above top cover 32.
As such, it is possible to dependence load simulating device, realize the load simulation to salinized soil, realize freeze thawing under load action and follow
The swollen test of salt that ring is coupled with drying and watering cycle.Improve test simulation effect, improve to salinized soil performance study analysis ability.
Wherein, described load simulating device, including the dowel steel 32-5 arranging straight up positioned at top cover upper surface,
Also include one to be horizontally disposed with and lever beam 15 above dowel steel for the apical grafting, lever beam one end is support end and support end upper table
Face is spacing by lever position-limit mechanism, and the lever beam other end is loading end and loading end is provided with and adds for the counterweight loading counterweight 17
Load plate 9.So, load negative pressure by way of lever, one is the size amplifying load by lever principle, and two is can be preferably
In holding process of the test, carrying size is constant, the simulation effect to ensure constant load.During enforcement further, lever limit
Position mechanism includes a fulcrum beam being horizontally placed on above lever beam, fulcrum beam spins by screw thread and is vertically provided with a tune
Section bolt 24, regulating bolt 24 lower end contacts formation fulcrum with lever beam.As such, it is possible to tune to lever level is better achieved
Section is it is ensured that the calculating of carrying accurately and keeps load steadily constant.During enforcement, the upper surface of lever beam loading end is additionally provided with
Air level 14, can preferably judge to adjust the level of lever beam.Further, lever beam and regulating bolt lower end contact position with
And and dowel steel tip contact at be the spherical structure of male-female engagement.As such, it is possible to be accurately positioned out force application location it is ensured that bearing
Carry and load effect.Yet further, the top surface middle part of counterweight loading disc upwardly extends a vertical peg of formation and is articulated in
On a hook in the middle part of peg beam loading end lower surface.So ensure that the counterweight weight loading is concentrated and be applied to the one of lever beam
On individual point, beneficial to the precision improving load simulation calculating.Yet further, in the middle part of top cover inner chamber, corresponding dowel steel position also has
The entirety being vertically connected with is in the connector of taper type, to be preferably delivered on sample load pressure in the form of evenly load
Surface.
Wherein, it is provided with bottom 35 at interior tube inner chamber bottom surface, bottom 35 upper surface forms interior tube inner chamber bottom surface, inside bottom
Hollow setting forms bottom cycle sap cavity room, and bottom periphery forms can slide up and down with interior tube inner chamber perisporium and contacts, under bottom
Side is provided with the bottom height adjustment mechanism being capable of the regulation of bottom height and position.During enforcement, bottom 35 bottom surface is additionally provided with
Export 35-2 with bottom cycle liquid chamber bottom circulation fluid entrance 35-1 and bottom circulation fluid.
So, by bottom as salting soil sample holding members and bottom cycle sap cavity room basic component, structure is simple
Reliable, bottom can slide up and down and height adjustment mechanism can be leaned on to adjust so as to the adjustment of specimen height can conveniently be realized, and carries
High test effect.
Wherein, described bottom height adjustment mechanism includes a height adjustment bolt 20, and height adjustment bolt 20 vertically sets
Put and screw thread spins cooperation in the middle screw thread in the hole of sample bottom of the barrel, height adjustment bolt upper end is rotationally joined by bearing 34
Conjunction is connected on bottom 35, and height adjustment bolt lower end is provided with altitude mixture control handle.
As such, it is possible to convenient pass through the adjustment to specimen height for the rotation height regulation handle realization, structure is simple, adjustment side
Just fast reliable.
Wherein, bottom height adjustment mechanism, also includes one and height adjustment bolt spaced rule 22 side by side,
Rule 22 is fixed on sample gantry, and height adjustment bolt lower section is additionally provided with an altitude location chi 21, highly fixed
Position chi 21 one end can slide up and down to spacing cooperation on rule 22, and the other end is by being fixed in height adjustment bolt 20
Individual bearing and height adjustment bolt 20 are rotatably connected.As such, it is possible to more easily directly observed reading obtains bottom
Adjust height, and then obtain specimen height.
Wherein, outer barrel includes the outer barrel body of cylindrical shape and positioned at an entirety of outer barrel body bottom portion bottom in the form of annular discs
Support 19, the screwed hole of collet 19 middle part setting and height adjustment bolt 20 cooperation, collet 19 is additionally provided with two circulation liquid pipes
Road via and an escape pipe via, collet upper surface is coaxially arranged with two circle draw-in grooves, outer barrel body and inner core each clamping
And seal and be fixed in corresponding draw-in groove.So, there is structure simple, the advantage of installation convenient for assembly.
Wherein, outer barrel also includes a sample bucket capping 30 positioned at outer barrel body upper end, and sample bucket covers 30 level sides
To projection be in that interior tube inner chamber is exposed at annular and middle part, sample bucket covers lower surface and outer barrel body upper end and inner core upper end
Any one is sealedly and fixedly connected and (so that it is not integrally affected interior with another one for the embedded grafting cooperation that can slide up and down
Cylinder vertically movable), sample bucket capping 30 on be provided with for access add water container conduit interface and pass through inside connection
Pipeline 29 is connected to interior tube inner chamber, and the capping of sample bucket is additionally provided with the interface 31 of the gas pipeline for accessing temperature control expansion box
And air dried cell is connected to by internal connecting pipe.So there is structure simple, convenient for assembly install and pipe arrangement
Advantage.When being embodied as, sample bucket capping lower surface has to be fixed for the outer barrel fixing with outer barrel body upper end grafting sealing
With cannelure, there is inside outer barrel fixation cannelure the downward annular flange flange of a circle, annular flange flange lower end can slide up and down to
Grafting coordinates in a capping connection cannelure of inner core upper surface.So, can facilitate sample bucket capping complete and
Inner core and the realization sealing easy to connect of outer barrel body, make it not affect inner core moving up and down in specimen again, protect
Confirmatory test precision is reliable.
In present embodiment, described inner core is spliced by multiple interior shell rings 28 vertically and obtains, between adjacent inner barrel section 28 by
In lower section, a shell ring upper surface taper type structure upwards is inserted into shell ring lower surface corresponding taper hole shape structure in top and joins
Close and be connected, and in lower end, shell ring does not constrain shell ring in upper end and moves up, at cooperation between adjacent inner barrel section outside be provided with close
Sealer 41 is used for completely cutting off the circumferential circulation fluid chamber outside fit clearance and inner core.So make in the swollen process of the test of salt, maximum
Degree reduces the constraint of the inner core inwall suffered by axial expansion of sample, substantially reduces the impact to the vertical swell increment of sample, pole
The earth improves test accuracy.
As a kind of version of diaphragm seal 41 during enforcement, can be using elastica and to be provided separately within adjacent two
At individual interior shell ring cooperation, such consumptive material is less.Can also be using the cylindrical shape diaphragm seal surrounding whole inner core peripheral surface, this
Sample can better ensure that sealing effectiveness and reduce the effect of constraint value to the vertical expansion of sample for the diaphragm seal itself.Preferably seal
Film upper and lower ends are fixed in the upper and lower ends of outer barrel inwall, so that circulation fluid is circulated in outer barrel inwall and seal intermembranous, circulation fluid
During circulation, diaphragm seal can be attached on interior bucket outer wall, and so existing good sealing effectiveness also has good temperature control effect, and will
The vertical impact expanding of sample is preferably minimized.
In present embodiment, shell ring in each is all correspondingly arranged at least one air dried cell and at least circumference is upper uniformly
Four of arrangement are used for the water inlet that sample is added water.So can more preferably and more uniformly improve humidity control effect.
In this specific embodiment, described circulation fluid temperature control equipment a, circulation fluid temperature control equipment b and circulation fluid
Temperature control equipment c, all using High Precision Low Temperature groove, has temperature control conveniently, the high advantage of control accuracy.
Above-mentioned salt is swollen, and tester has the advantages that 1. achieves water content continually varying dry and wet under temperature-controllable
Test that cyclic salt is swollen；2. achieve the swollen test of the salt that under load action, freeze-thaw cycle is coupled with drying and watering cycle；3. function is integrated
Degree is high, enables under the influence factors such as freeze-thaw cycle, thermograde, load, drying and watering cycle and each influence factor's coupling condition
The swollen test of salt, and each factor all can manual control above；4. stagewise sample bucket substantially reduces the vertical swell increment to sample
Impact, test result more accurate；5. sample drum head supporting plate height can realize specimen height at sample bucket (interior bucket) with up-down adjustment
Any setting in altitude range.
Performance detection test is carried out to above-mentioned tester, result of the test shows the sample of a high 30cm, diameter 10cm
Water content from 20% drop to 3%～6% only need 2d～4d(temperature low when the time longer, current temperature 0～5 DEG C need
6d), the salt bulk measured using stagewise sample bucket is substantially big compared with the salt bulk that monoblock type sample bucket is measured, and therebetween
Gap increase with specimen height and increase, and slightly reduce with the increase of specimen finish.During drying and watering cycle circulation experiment
The air pressure of air in calorstat should strictly be controlled, to avoid air pressure to cross havoc soil sample structure, preferably control within 30kpa.
Therefore the swollen tester of above-mentioned salt is capable of more environment parameter controls, improves test simulation effect, has structure
Simply, test accuracy is high, and sample parameter is flexibly adjustable, can advantage more than test method, be highly suitable for salinized soil performance
Research.
Claims (10)
1. a kind of salt swollen test humidity control method, carries out the swollen test of salt using the swollen tester of salt in this method, its feature exists
In, during test, by rely on and water source connect pipeline be connected into, inside salt swollen tester inner core, sample soil being carried out
Humidification controls, and relies on the pipeline connecting with wind regime to be connected into the air dried cell of setting on tube inner chamber inwall in the swollen tester of salt
In, sample soil is carried out air-dry control.
2. salt as claimed in claim 1 swollen test humidity control method is it is characterised in that employ the swollen test of following salt
Instrument is carried out, and salt is swollen, and tester includes sample bucket and temperature regulation system, and sample bucket includes outer barrel and the inner core being arranged in outer barrel,
Outer barrel is vertically installed on sample gantry, and temperature regulation system includes a circulation fluid temperature control equipment a, circulates liquid temp control
The circumferential circulation fluid chamber circulation that device a processed passes through gap composition between circulation fluid pipeline and outer barrel and inner core connects, and also includes
For realizing the sample humidity control system that the humidity to inner core pilot scale sample controls；
Described sample humidity control system includes a container that adds water being arranged at outside sample bucket, and the container that adds water passes through pipeline
It is connected to inner tank theca and inner core inner space；
Described sample humidity control system also includes an air compressor machine, and air compressor machine outlet side is connected to one by gas pipeline
Temperature control expansion box, temperature control expansion box is provided with the expansion box attemperating unit realizing internal temperature control, and temperature control expansion box is given vent to anger
Mouth is connected in the air dried cell being arranged at inner core inwall by gas pipeline, is provided with gas outlet and passes through in air dried cell
Feed channel is connected to outside sample bucket.
3. salt swollen test humidity control method as claimed in claim 2 is it is characterised in that arrange on described temperature control expansion box
There is a circulation fluid interlayer, circulation fluid interlayer passes through pipeline and a circulation fluid temperature control equipment c circulation connection.
4. salt swollen test humidity control method as claimed in claim 2 is it is characterised in that described air dried cell was included along week
To the annular groove being arranged on inner core inwall, the closing of annular groove notch position is provided with a circle baffle plate, baffle plate offers
Some passages, form between baffle plate and annular groove for the ventilating layer with gas pipeline communication.
5. salt as claimed in claim 2 swollen test humidity control method is it is characterised in that interior tube inner chamber top face is adjacent
It is provided with a top circulation fluid chamber, top circulation fluid chamber passes through circulation fluid pipeline and described circulation fluid temperature control equipment
A circulation connection setting；Interior tube inner chamber subjacent has been disposed adjacent a bottom cycle sap cavity room, and bottom cycle sap cavity room is passed through
Circulation fluid pipeline and a circulation fluid temperature control equipment b circulation connection setting.
6. salt as claimed in claim 5 swollen test humidity control method is it is characterised in that be provided with interior tube inner chamber top surface
Top cover, top cover lower surface constitute in tube inner chamber top surface, the setting of top cover inner hollow forms top circulation fluid chamber, lid periphery and
Interior tube inner chamber perisporium forms the contact that can slide up and down, and top cover is vertically provided through temperature sensor fixing hole and humidity passes
Sensor installing hole, temperature sensor fixing hole is used for mounting temperature sensor and the display portion of temperature sensor is exposed to
Above sample bucket, humidity sensor installing hole is used for installing humidity sensor and so that humidity sensor is exposed to sample bucket
Side；It is additionally provided with above top cover for detecting that top cover moves up the instrumentation of distance.
7. salt as claimed in claim 6 swollen test humidity control method it is characterised in that be additionally provided with above top cover for
Top cover is applied with the load simulating device of downward pressure.
8. salt as claimed in claim 5 swollen test humidity control method is it is characterised in that be provided with interior tube inner chamber bottom surface
Bottom, bottom upper surface forms interior tube inner chamber bottom surface, and the setting of bottom inner hollow forms bottom cycle sap cavity room, bottom periphery and
Interior tube inner chamber perisporium forms the contact that can slide up and down, and is provided with the bottom height being capable of bottom height and position below bottom
Governor motion.
9. salt as claimed in claim 8 swollen test humidity control method is it is characterised in that described bottom height adjustment mechanism
Including a height adjustment bolt, height adjustment bolt is vertically arranged and screw thread spins cooperation in the middle screw thread of sample bottom of the barrel
In the hole, height adjustment bolt upper end is rotatably engaged by bearing and is connected on bottom, and height adjustment bolt lower end is provided with height
Degree regulation handle.
10. salt swollen test humidity control method as claimed in claim 9, it is characterised in that bottom height adjustment mechanism, is gone back
Including one and height adjustment bolt spaced rule side by side, rule is fixed on sample gantry, altitude mixture control spiral shell
One altitude location chi is additionally provided with bolt lower section, altitude location chi one end can slide up and down to spacing cooperation in rule
On, the other end is rotatably connected by a bearing being fixed in height adjustment bolt and height adjustment bolt.
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| CN106370815B (en) | 2018-10-23 |
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