CN105004850B - The experimental rig of a kind of quantitative simulation soil body three axle sample drying and watering cycle and method - Google Patents
The experimental rig of a kind of quantitative simulation soil body three axle sample drying and watering cycle and method Download PDFInfo
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- CN105004850B CN105004850B CN201510299066.XA CN201510299066A CN105004850B CN 105004850 B CN105004850 B CN 105004850B CN 201510299066 A CN201510299066 A CN 201510299066A CN 105004850 B CN105004850 B CN 105004850B
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Abstract
The invention discloses a kind of experimental rig and the method for the quantitative simulation soil body three axle sample drying and watering cycle, further relate to the use of one-shot forming three axle sample mould.Device includes casing, humidification mechanism, drier, Weighing mechanism, controlling organization and sealing mechanism.Set one layer of water-stop sheet in casing and inner chamber is divided into humidification drying chamber and the chamber of weighing of bottom on top, humidification mechanism is installed in humidification drying chamber sidewall, drier is installed in humidification drying chamber top, Weighing mechanism is installed in bottom chamber of weighing, water-stop sheet is provided with the circular hole allowing three axle samples be disposed through on Weighing mechanism, and sealing mechanism is arranged at the top of three axle samples.Humidification mechanism, the on an off of drier and sealing mechanism lift by controlling organization control.The inventive method can be monitored three axle sample masses in real time and determine its moisture content, fixing quantity sample dry and wet degree, has automaticity high, and drying and wetting is uniform, mitigation, and simple to operate, drying and watering cycle is effective, efficiency advantages of higher.
Description
Technical field
The present invention relates to technical field of civil engineering, particularly to a kind of quantitative simulation soil body three axle sample drying and watering cycle
Experimental rig and method, be mainly used in geotechnical study and three axle samples carried out wetting-drying test.
Background technology
Behind south China damp-heat area, extensive rainfall and rain, the rapid evaporation of moisture alternately occurs often, causes ground
The moisture content of the table soil body occurs repeatedly to change；Alternation of wetting and drying causes river, the water level in lake and level of ground water that reciprocal change occurs
Change, make filled-up ground at reservoir stability and hypsography low-lying be in the environment of drying and watering cycle.Under the effect of drying and watering cycle, roadbed
Or the strength and stiffness of slope soil have decayed, the deterioration of roadbed long-term behaviour, service life is caused to reduce, under slope stability
The disasters such as fall, easily initiation landslide.For verifying soil body deterioration rule of engineering characteristic under drying and watering cycle effect, evaluate roadbed accordingly
With stability and the durability of side slope, provide theory support for operation maintenance, the soil body need to be carried out wetting-drying test.
In current wetting-drying test, the humidification of the soil body is generally used infusion method or spray process, be dried and generally use
High-temperature oven drying method, this drying and watering cycle process is excessively violent, often results in three axle specimen surfaces peelings, serious cracking, with deep layer road
In base, water content is slowly, the actual conditions of even variation are not inconsistent.Owing to the sample of direct shear test can enter under the protection of cutting ring
Row humidification, major part wetting-drying test at present uses staight scissors sample, and the wet-dry test of three axle samples is less, but triaxial test phase
Have can apply the obvious advantage such as active force and non-fixed shear face in three directions simultaneously than direct shear test, therefore, to three axles
It is necessary that wetting-drying test carried out by sample.Additionally, in conventional test, the weighing of three axle samples, humidify and be dried generally
Do not carry out at same position, not only inconvenient to three axle sample displacements, and easily make three axle sample disturbance damages, cause test
Result is inaccurate or test failure.Exactly because method the most before weighing three axle samples need three axle samples are shifted repeatedly
And easily causing three axle specimen fails, major part test selects only to control humidification, drying time, three axle samples not to be carried out matter
Amount weighs, thus can not fixing quantity three axle sample moisture content.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, it is provided that one can monitor three axle samples in real time
Quality also determines three axle sample moisture content, energy fixing quantity three axle sample dry and wet degree, and automaticity is high, simple to operate, system
Sample quality is high, and drying and watering cycle is effective, efficiency is high, and the drying and wetting quantitative simulation soil body three axle sample dry and wet uniform, that relax is followed
The experimental rig of ring and test method.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is:
The experimental rig of a kind of quantitative simulation soil body three axle sample drying and watering cycle, including transparent cabinet, humidification mechanism, is dried
Mechanism, Weighing mechanism, controlling organization and the sealing mechanism for sealing three axle samples, described casing front and rear wall is equipped with case
Door, box house arranges one layer of water-stop sheet and cabinets cavity is divided into superposed humidification-drying chamber and is positioned at weighing of bottom
Chamber, described humidification mechanism is installed on the sidewall of humidification-drying chamber, and drier is installed in the top of humidification-drying chamber, weighs
Mechanism is installed in bottom chamber of weighing, and water-stop sheet is provided with and allows three axle samples through the circular hole being placed on Weighing mechanism, sealer
Structure is liftably arranged at the top of three axle samples, and controlling organization controls described humidifier according to the quality target value set
Structure, the on an off of drier and the lifting of sealing mechanism.
Further improvement as technique scheme:
Preferably, described sealing mechanism includes that seal closure, lifting rope and lifting pulley, described seal closure are bottom end opening, top
The hollow cylinder that end seals, its internal diameter and height are slightly larger than three axle samples；Described lifting pulley is installed in the top of casing；Hang
Rope one end is connected to seal closure end face, and the other end is walked around lifting pulley and is connected to described controlling organization.
Preferably, described humidification mechanism includes being positioned at storage tank integral outside casing and atomization box, and storage tank is positioned at
Top, its bottom is provided with water level controller, and atomization box is positioned at bottom, is provided with atomizer bottom it, and top is provided with band spray nozzle
Injection spray pipe, injection spray pipe is provided with spray amount adjuster, and described spray nozzle stretches into box house.
Preferably, described drier is positioned at box house, and including thermal resistance and miniature exhaust fan, miniature exhaust fan is positioned at
The top of thermal resistance.
Preferably, described Weighing mechanism include sensing the high-precision electronic of three axle sample water evaporation quantities claim and
For supporting the cylinder cushion block of three axle samples, described cylinder cushion block is placed in high-precision electronic through the circular hole on water-stop sheet and deserves to be called,
Leaving gap between side and the circular hole wall of cylinder cushion block, end face is slightly above water-stop sheet, and the diameter of cylinder cushion block is with three axle samples
Diameter.
Preferably, described controlling organization is positioned at outside casing, including humidification mechanism switch, drier switch, spray amount
Adjusting knob, temperature adjustment knob, wind speed adjusting knob, seal closure lift valve and automatic controller, described automatic controller
Connect humidification mechanism, drier, Weighing mechanism and sealing mechanism, when automatic controller judges that the quality of Weighing mechanism reaches
During to desired value, control is dry, wet mechanism is automatically switched off and seal closure declines automatically.
Preferably, described water-stop sheet surrounding and circular hole periphery are provided with dash band, and water-stop sheet periphery is provided with osculum, draining
Run in below hole water pipe, and it is outer by ponding discharge that drainpipe stretches out casing.
Preferably, described three axle samples by three axle sample sampling die one-shot formings, described sampling die include the collar, two
Part inner chamber is petal and the two pieces cushion block of semi-cylindrical, and it is whole that petal described in two pieces is merged into one by the collar outside being sheathed on
Body, forms an internal diameter with the cylindrical cavity of three axle specimen finish, the top that two pieces cushion block is divided in cylindrical cavity and under
Portion, middle part forms the space for shaping three axle samples.
As an overall design, the present invention also provides for a kind of using the above-mentioned experimental rig quantitative simulation soil body three axle
The test method of sample drying and watering cycle, comprises the steps:
1) three axle samples are made；
2) the three axle samples made are positioned on the cylinder cushion block of Weighing mechanism, and are positioned at humidification-drying chamber, in high precision
On electronic scale, the quality of display is three axle sample initial massesClaim high-precision electronic after, to reset；
3) according to the initial mass of three axle samples, initial aqueous rateWith target moisture content w, according to the following formula
Three axle sample aimed quality m:, and humidification quality target value is set on controlling organization；
4) closing chamber door, open humidification mechanism, spray nozzle is sprayed, and three axle sample humidifications, three axle sample masses increase；
5) when high-precision electronic claim to monitor three axle sample masses increase to humidify quality target value time, humidification mechanism is automatic
Closing, seal closure automatically lands and covers whole three axle samples, and three axle samples stand 12 hours in seal closure, make in three axle samples
Moisture diffusion uniform；
6), after standing, handle seal closure lift valve and make seal closure rise, dry mass desired value is set；
7) opening chamber door, open drier, send warm braw, three axle samples dried, three axle sample masses reduce；
8) when high-precision electronic claim to monitor three axle sample masses be reduced to dry mass desired value time, drier is automatic
Closing, seal closure automatically lands and covers whole three axle samples, and three axle samples stand 12 hours in seal closure, make in three axle samples
Moisture diffusion uniform；
9), after standing, handle seal closure lift valve and make seal closure rise；
10) according to test needs, determine repetition step 3)-9) wetting-drying test number of times, dry and wet order and moisture content
Amplitude of variation.
Preferably, described step 1) makes specifically comprising the following steps that of three axle samples
11) according to three axle sample dry densities and initial aqueous rate of getting the raw materials ready, weighing quality isSoil；
12) uniform application vaseline on the two pieces petal inwall of three axle test sample-producing dies, then preservative film is paved patch
Invest on inwall；
13) merging petal, put into lower cushion block, lower cushion block bottom surface flushes with petal bottom surface, puts the collar, by step 11)
The soil weighed disposably is poured in petal, puts into cushion block, carries out preliminary consolidation with hand by pressing cushion block；
14) flush with petal end face with cushion block supreme cushion block end face on jack pushing tow, static pressure demoulding after 30 minutes, i.e. make
Obtain described three axle samples.
Compared with prior art, it is an advantage of the current invention that:
The experimental rig of the present invention, the drying and wetting in process of the test is uniform, mitigation, and whole process of the test need not three
Axle sample shifts, and can monitor three axle sample masses in real time and determine three axle sample moisture content, and then fixing quantity three axle sample is done
Wet degree；Sealed environment can be provided to make three axle sample moisture diffusion uniform to three axle samples after dry, wet；Can automatically control
The operating of dry and wet mechanism processed and the lifting of seal closure；Sampling die overcomes compaction in layers sample after drying and watering cycle easily in layering
The problem of place's fracture.It is high that the inventive method has automaticity, simple to operate, and sample quality is high, and drying and watering cycle is effective, effect
Rate advantages of higher.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of wetting-drying circular tester of the present invention.
Fig. 2 is the side-looking structural representation of wetting-drying circular tester of the present invention.
Fig. 3 is the structural representation of water-stop sheet in the present invention.
Fig. 4 is the structural representation in the present invention before sampling die assembling.
Fig. 5 is the plan structure schematic diagram in the present invention after the merging of bivalve mould.
Marginal data:
1, casing；2, humidification mechanism；3, drier；4, Weighing mechanism；5, sealing mechanism；6, controlling organization；7, water proof
Plate；8, atomizer；9, water level controller；10, spray nozzle；11, spray amount adjuster；12, storage tank；13, thermal resistance；14, micro-
Type exhaust fan；15, high-precision electronic claims；16, cylinder cushion block；17, seal closure；18, lifting rope；19, lifting pulley；20, humidifier
Structure switchs；21, drier switch；22, spray amount adjusting knob；23, temperature adjustment knob；24, wind speed adjusting knob；25、
Seal closure lift valve；26, automatic controller；27, circular hole；28, dash band；29, osculum；30, drainpipe；31, petal；
32, the collar；33, upper cushion block；34, lower cushion block；35, three axle sample.
Detailed description of the invention
For the ease of understanding the present invention, below in conjunction with Figure of description and preferred embodiment, the present invention is made more complete
Face, describe meticulously, but protection scope of the present invention is not limited to embodiment in detail below.
As Figure 1-Figure 5, the experimental rig of the quantitative simulation soil body three axle sample drying and watering cycle of a kind of present invention is implemented
Example, including transparent organic glass casing 1, humidification mechanism 2, drier 3, Weighing mechanism 4, controlling organization 6 and for sealing
The sealing mechanism 5 of three axle samples 35, casing 1 front and rear wall is equipped with a fan chamber door, and casing 1 is internal arranges one layer of water-stop sheet 7, by case
Body 1 inner chamber is divided into superposed humidification-drying chamber and is positioned at the chamber of weighing of bottom, and humidification mechanism is installed in humidification-drying chamber
Sidewall on, drier 3 is installed in the top of humidification-drying chamber, and Weighing mechanism 4 is installed in bottom chamber of weighing, and water-stop sheet 7 is used
To isolate the Weighing mechanism 4 impact from other process.Water-stop sheet 7 is provided with and allows three axle samples 35 through being placed in Weighing mechanism
Circular hole 27 on 4, whole three axle samples 35 will be located in water-stop sheet more than 7, it is ensured that humidification, the uniformity of dry run.Seal
Mechanism 5 is liftably arranged at the top of three axle samples 35, controlling organization 6 according to set quality target value control described in add
Wet mechanism 2, the on an off of drier 3 and the lifting of sealing mechanism 5.
In the present embodiment, three axle samples 35 by three axle sample sampling die one-shot formings, this sampling die include the collar 32,
Two pieces inner chamber is petal 31 and two pieces cylinder cushion block (respectively going up cushion block 33 and lower cushion block 34), the two pieces lobe of semi-cylindrical
Mould 31 merges integral by being sheathed on the collar 32 in outside, forms an internal diameter empty with the cylinder of three axle sample 35 diameters
Chamber, the upper and lower that upper cushion block 33 and lower cushion block 34 are divided in cylindrical cavity, middle part is formed for shaping three axle samples
Space.The upper high 50mm of cushion block 33, the high 10mm of lower cushion block 34, petal height deducts upper and lower cushion block height sum and is three axle examinations
The height of sample, uses the supreme cushion block of earth material in jack pushing tow static pressure bivalve mould to be completely forced in bivalve mould, and three axle samples are straight
Footpath and height be able to reach to expect that requirement, the one-shot forming of three axle samples overcome compaction in layers sample and easily exist after drying and watering cycle
The problem of fracture at layering.
In the present embodiment, Weighing mechanism 4 includes that high-precision electronic claims 15 and for supporting the cylinder pad of three axle samples 35
Block 16, the diameter of cylinder cushion block 16 is with three axle sample 35 diameters, and height is 20mm.High-precision electronic claims 15 can sense three axles
Sample water evaporation quantity.Before the wetting-drying circular tester of the present invention put into by three axle samples 35, need first to be worn by cylinder cushion block 16
Cross the circular hole 27 on water-stop sheet 7 to be placed in high-precision electronic and claim on 15, and ensure that the side of cylinder cushion block 16 does not connects with circular hole 27 wall
Touching, leave minim gap therebetween, claim 15 owing to water-stop sheet 7 is only slightly higher than high-precision electronic, therefore the end face of cylinder cushion block 16 is high
In water-stop sheet 7, placing three axle samples 35 the most again on cylinder cushion block 16, whole soil sample will be located in water-stop sheet more than 7, it is ensured that
Humidification, the uniformity of dry run.Owing to casing uses transparent material, can observe electronic scale numerical value through casing, therefore, can
According to test needs, force interrupt humidification or dry run.
In the present embodiment, humidification mechanism 2 includes being positioned at outside casing 1 and integral storage tank 12 and atomization box, water storage
Case 12 is positioned at top, and its bottom is provided with water level controller 9, and atomization box is positioned at bottom, is provided with atomizer 8 bottom it, and top is provided with
With the injection spray pipe of spray nozzle 10, injection spray pipe is provided with spray amount adjuster 11, and it is internal that spray nozzle 10 stretches into casing 1.Water-stop sheet 7 four
Week and circular hole 27 periphery are provided with dash band 28, and water-stop sheet 7 periphery is provided with osculum 29, and run in below osculum 29 water pipe 30,
It is outer by ponding discharge that drainpipe 30 stretches out casing 1.During humidification, opening humidification mechanism, close drier, chamber door is closed, test
Device is in sealing state.Distilled water is atomized into spraying and is sprayed by spray nozzle by the atomizer in humidification mechanism, and spray nozzle is positioned at
More than water-stop sheet, fog uniformly can spread at the humidification-drying chamber on water-stop sheet top.Water-stop sheet surrounding and circular hole periphery are arranged
It is dirty that dash band intercepts ponding, and the ponding on water-stop sheet is discharged by drainpipe.Deposit between circular hole and the cylinder cushion block of water-stop sheet
In gap, but only bigger than cylinder cushion block due to circular hole, and gap the most between the two is small, invades water-stop sheet bottom by gap
Chamber fog of weighing negligible, also can place drier in the chamber of weighing of bottom, it is ensured that chamber of weighing is in drying regime,
Ensure normal work and the accuracy of quality weighing of electronic scale.Can by spray amount adjuster control spray amount size with
Realize different humidification speed.When the water level deficiency of storage tank, need to retaining in storage tank.
In the present embodiment, it is internal that drier 3 is positioned at casing 1, including thermal resistance 13 and miniature exhaust fan 14, miniature exhaust
Fan 14 is positioned at the top of thermal resistance 13.When being dried, opening drier, close humidification mechanism, chamber door is opened, inside experimental rig
Space connects with space outerpace.The thermal resistance of drier makes ambient air temperature raise, and miniature exhaust fan makes drier send
Go out warm braw.Can pass through thermoregulator, velocity regulator controls the height of drier temperature with the size of wind speed to realize
Different rate of dryings.
In the present embodiment, controlling organization 6 is positioned at outside casing 1, including humidification mechanism switch 20, drier switch 21,
Spray amount adjusting knob 22, temperature adjustment knob 23, wind speed adjusting knob 24, seal closure lift valve 25 and automatic controller
26, automatic controller 26 connects humidification mechanism 2, drier 3, Weighing mechanism 4 and sealing mechanism 5.Sealing mechanism 5 includes close
Sealing cover 17, lifting rope 18 and lifting pulley 19, seal closure 17 is the hollow cylinder plexiglass tent of bottom end opening, end sealing,
Its internal diameter and height are slightly larger than three axle samples 35；Lifting pulley 19 is installed in the top of casing 1；Lifting rope 18 one end is connected to seal
Covering 17 end faces, the other end is walked around lifting pulley 19 and is connected to controlling organization 6.When Weighing mechanism 4 judged by automatic controller 26
Quality when reaching desired value, control dry, wet mechanism is automatically switched off and seal closure 17 declines automatically.
The principle of the present invention:
In humidification, casing water-stop sheet space above is full of fog, and three axle samples can absorb around uniformly, lentamente
Moisture, quality is gradually increased, and moisture content gradually rises；In dry run, the moisture evaporation in three axle samples, quality gradually subtracts
Little, moisture content is gradually reduced.Assume the initial mass of known three axle samples, initial aqueous rateWith target moisture content,
Three axle sample aimed quality according to the following formula:, and quality target value is set on controlling organization.When
Controlling organization is judged when the quality of Weighing mechanism reaches desired value, and automatic controller is to humidification or drier and sealer
Structure sends instruction, and humidification or drier are automatically switched off, and seal closure declines automatically.Seal closure inner space be slightly larger in dimension than three
Axle sample yardstick and seal closure are without bottom surface, and therefore, seal closure will not be with three axle sample contacts, and three axle samples are in seal closure
Standing and within 12 hours, make the diffusion of sample internal moisture uniformly, seal closure provides sealing space to sample so that it is during standing
Do not have water-cut variation.
After three axle samples stand, need manual operation seal closure lift valve to rise seal closure, and then carry out subsequent process.
Can need, according to test, the dry and wet order determining in the drying moistening cycle of three axle samples and each circulation and do
Wet amplitude.
Multiple three axle samples can be humidified simultaneously according to test needs or are dried, it is only necessary to expand or shrink test dress
Put size, the quantity of circular hole, seal closure and electronic scale is increased or decreased, promote or reduce humidification or the ability of drier, from
Dynamic control program need to change into when the quality on certain electronic scale reaches desired value, the sealing that this electronic scale that automatically lands is corresponding
Cover, when the quality on all electronic scales reaches desired value, is automatically switched off humidification or drier.
Use the test method of the above-mentioned experimental rig quantitative simulation soil body three axle sample drying and watering cycle, including walking as follows
Rapid:
1) three axle samples are made:
11) according to three axle sample dry densities and initial aqueous rate of getting the raw materials ready, weighing quality isSoil；
12) uniform application vaseline on the two pieces petal inwall of three axle test sample-producing dies, then preservative film is paved patch
Invest on inwall；
13) merging petal, put into lower cushion block, lower cushion block bottom surface flushes with petal bottom surface, puts the collar, by step 11)
The soil weighed disposably is poured in petal, puts into cushion block, carries out preliminary consolidation with hand by pressing cushion block；
14) flush with petal end face with cushion block supreme cushion block end face on jack pushing tow, static pressure demoulding after 30 minutes, i.e. make
Obtain three axle samples；
2) the three axle samples made are positioned on the cylinder cushion block of Weighing mechanism, and are positioned at humidification-drying chamber, in high precision
On electronic scale, the quality of display is three axle sample initial massesClaim high-precision electronic after, to reset；
3) according to the initial mass of three axle samples, initial aqueous rateWith target moisture content w, according to the following formula
Three axle sample aimed quality m:, and humidification quality target value is set on controlling organization；
4) closing chamber door, open humidification mechanism, spray nozzle is sprayed, and three axle sample humidifications, three axle sample masses increase；
5) when high-precision electronic claim to monitor three axle sample masses increase to humidify quality target value time, humidification mechanism is automatic
Closing, seal closure automatically lands and covers whole three axle samples, and three axle samples stand 12 hours in seal closure, make in three axle samples
Moisture diffusion uniform；
6), after standing, handle seal closure lift valve and make seal closure rise, dry mass desired value is set；
7) opening chamber door, open drier, send warm braw, three axle samples dried, three axle sample masses reduce；
8) when high-precision electronic claim to monitor three axle sample masses be reduced to dry mass desired value time, drier is automatic
Closing, seal closure automatically lands and covers whole three axle samples, and three axle samples stand 12 hours in seal closure, make in three axle samples
Moisture diffusion uniform；
9), after standing, handle seal closure lift valve and make seal closure rise；
10) according to test needs, determine repetition step 3)-9) wetting-drying test number of times, dry and wet order and moisture content
Amplitude of variation.
Claims (10)
1. an experimental rig for the quantitative simulation soil body three axle sample drying and watering cycle, including transparent cabinet (1), humidification mechanism (2),
Drier (3), Weighing mechanism (4) and controlling organization (6), it is characterised in that: also include for sealing three axle samples (35)
Sealing mechanism (5), described casing (1) front and rear wall is equipped with chamber door, and casing (1) is internal arranges one layer of water-stop sheet (7) by casing (1)
Inner chamber is divided into superposed humidification-drying chamber and be positioned at the chamber of weighing of bottom, described humidification mechanism (2) be installed in add wet-dry
On the sidewall in dry chamber, drier (3) is installed in the top of humidification-drying chamber, and Weighing mechanism (4) is installed in bottom chamber of weighing,
Water-stop sheet (7) is provided with and allows three axle samples (35) through the circular hole (27) being placed on Weighing mechanism (4), and sealing mechanism (5) can
Being arranged at the top of three axle samples (35) up and down, controlling organization (6) controls described humidification according to the quality target value set
Mechanism (2), the on an off of drier (3) and the lifting of sealing mechanism (5).
Experimental rig the most according to claim 1, it is characterised in that: described sealing mechanism (5) includes seal closure (17), hangs
Rope (18) and lifting pulley (19), described seal closure (17) is the hollow cylinder of bottom end opening, end sealing, its internal diameter and height
Degree is slightly larger than three axle samples (35)；Described lifting pulley (19) is installed in the top of casing (1)；Lifting rope (18) one end is connected to close
Sealing cover (17) end face, the other end is walked around lifting pulley (19) and is connected to described controlling organization (6).
Experimental rig the most according to claim 1, it is characterised in that: described humidification mechanism (2) includes being positioned at casing (1) outward
Storage tank (12) that side is integral and atomization box, storage tank (12) is positioned at top, and its bottom is provided with water level controller (9), atomization
Case is positioned at bottom, is provided with atomizer (8) bottom it, and top is provided with the injection spray pipe of band spray nozzle (10), and injection spray pipe is provided with spraying
Amount adjuster (11), it is internal that described spray nozzle (10) stretches into casing (1).
Experimental rig the most according to claim 1, it is characterised in that: it is internal that described drier (3) is positioned at casing (1),
Including thermal resistance (13) and miniature exhaust fan (14), miniature exhaust fan (14) is positioned at the top of thermal resistance (13).
Experimental rig the most according to claim 1, it is characterised in that: described Weighing mechanism (4) includes sensing three
The high-precision electronic of axle sample (35) water evaporation quantity claims (15) and for supporting the cylinder cushion block (16) of three axle samples (35),
Described cylinder cushion block (16) is placed in high-precision electronic through the circular hole (27) on water-stop sheet (7) and claims on (15), cylinder cushion block (16)
Side and circular hole (27) wall between leave minim gap, end face is slightly above water-stop sheet (7), and the diameter of cylinder cushion block (16) is with three
Axle sample (35) diameter.
Experimental rig the most according to claim 2, it is characterised in that: described controlling organization (6) is positioned at casing (1) outside,
Including humidification mechanism switch (20), drier switch (21), spray amount adjusting knob (22), temperature adjustment knob (23), wind
Speed adjusting knob (24), seal closure lift valve (25) and automatic controller (26), described automatic controller (26) connects humidification
Mechanism (2), drier (3), Weighing mechanism (4) and sealing mechanism (5), when Weighing mechanism judged by automatic controller (26)
(4), when quality reaches desired value, control is dry, wet mechanism is automatically switched off and seal closure (17) declines automatically.
Experimental rig the most according to claim 1, it is characterised in that: described water-stop sheet (7) surrounding and circular hole (27) periphery
Being provided with dash band (28), water-stop sheet (7) periphery is provided with osculum (29), and run in water pipe (30) in osculum (29) lower section, draining
Pipe (30) stretches out casing (1) and is discharged by ponding outward.
8. according to the experimental rig according to any one of claim 2-7, it is characterised in that: described three axle samples (35) are by three axles
Sample sampling die one-shot forming, described sampling die include petal (31) that the collar (32), two pieces inner chamber are semi-cylindrical with
And two pieces cushion block, petal (31) described in two pieces merges integral by being sheathed on the collar (32) in outside, formed an internal diameter with
The cylindrical cavity of three axle sample (35) diameters, two pieces cushion block is divided into the upper and lower in cylindrical cavity, and middle part is formed
For being molded the space of three axle samples (35).
9. use a test method for the experimental rig quantitative simulation soil body three axle sample drying and watering cycle described in claim 8,
It is characterized in that: comprise the steps:
1) three axle samples are made；
2) the three axle samples made are positioned on the cylinder cushion block of Weighing mechanism, and are positioned at humidification-drying chamber, high-precision electronic
The quality deserving to be called display is three axle sample initial massesClaim high-precision electronic after, to reset；
3) according to the initial mass of three axle samples, initial aqueous rateWith target moisture content w, three axle according to the following formula
Sample aimed quality m:, and humidification quality target value is set on controlling organization；
4) closing chamber door, open humidification mechanism, spray nozzle is sprayed, and three axle sample humidifications, three axle sample masses increase；
5) when high-precision electronic claim to monitor three axle sample masses increase to humidify quality target value time, humidification mechanism is closed automatically
Closing, seal closure automatically lands and covers whole three axle samples, and three axle samples stand 12 hours in seal closure, make in three axle samples
Moisture diffusion is uniform；
6), after standing, handle seal closure lift valve and make seal closure rise, dry mass desired value is set；
7) opening chamber door, open drier, send warm braw, three axle samples dried, three axle sample masses reduce；
8) when high-precision electronic claim to monitor three axle sample masses be reduced to dry mass desired value time, drier closes automatically
Closing, seal closure automatically lands and covers whole three axle samples, and three axle samples stand 12 hours in seal closure, make in three axle samples
Moisture diffusion is uniform；
9), after standing, handle seal closure lift valve and make seal closure rise；
10) according to test needs, determine repetition step 3)-9) wetting-drying test number of times, dry and wet order and water-cut variation
Amplitude.
Test method the most according to claim 9, it is characterised in that: described step 1) makes the concrete of three axle samples
Step is as follows:
11) according to three axle sample dry densities and initial aqueous rate of getting the raw materials ready, weighing quality isSoil；
12) uniform application vaseline on two petal inwalls of three axle test sample-producing dies, then in preservative film is paved being attached at
On wall；
13) merging petal, put into lower cushion block, lower cushion block bottom surface flushes with petal bottom surface, puts the collar, will weigh in step 11)
Soil disposably pour in petal, put into cushion block, carry out preliminary consolidation with hand by pressing cushion block；
14) flush with petal end face with cushion block supreme cushion block end face on jack pushing tow, static pressure demoulding after 30 minutes, i.e. prepare institute
State three axle samples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108007780B (en) * | 2017-10-26 | 2020-02-18 | 华南理工大学 | Simulation method and device for dry-wet cycle test of three-direction stress state of roadbed slope |
| CN108106940A (en) * | 2018-01-05 | 2018-06-01 | 华侨大学 | A kind of triaxial tests instrument test specimen apparatus for measuring quality |
| CN109030769A (en) * | 2018-06-14 | 2018-12-18 | 长沙理工大学 | The experimental rig of charcoal mudrock crack development law is disintegrated under the conditions of a kind of drying and watering cycle in advance |
| CN109187207A (en) * | 2018-08-18 | 2019-01-11 | 中山大学 | A kind of drying and watering cycle true triaxial test system |
| CN109752276A (en) * | 2019-02-21 | 2019-05-14 | 贵州大学 | A kind of three axis sample wetting-drying circular tester of the soil body and its test method |
| CN112964855B (en) * | 2021-02-05 | 2023-02-10 | 合肥工业大学 | Test device and test method for rainfall-evaporation circulation and soil fracture characteristic measurement |
| CN112903973A (en) * | 2021-03-03 | 2021-06-04 | 中国矿业大学 | Soil body dry-wet cycle effect simulation experiment instrument based on quality threshold control |
| CN113092213B (en) * | 2021-04-25 | 2023-06-30 | 西藏农牧学院 | Triaxial sample batch manufacturing device and method capable of performing dry-wet circulation |
| CN114062657B (en) * | 2021-11-16 | 2023-06-06 | 中国电建集团江西省电力设计院有限公司 | Rock-soil body dry-wet circulation test system and method in unsaturated state |
| CN114354434B (en) * | 2021-12-28 | 2023-11-21 | 中国路桥工程有限责任公司 | Roadbed material dry-wet cycle test device and test method |
| CN114460268A (en) * | 2022-01-09 | 2022-05-10 | 三峡大学 | Experimental device and method for simulating soil body cracking and collapsing process under periodic water level lifting action |
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| JP5315869B2 (en) * | 2007-09-10 | 2013-10-16 | Ｊｆｅスチール株式会社 | Corrosion resistance evaluation method for metal material, metal material and corrosion acceleration test apparatus for metal material |
| CN201397288Y (en) * | 2009-05-08 | 2010-02-03 | 中国铁道科学研究院铁道建筑研究所 | Concrete sulfate corrosion wet-dry circle testing machine |
| JP2013134162A (en) * | 2011-12-27 | 2013-07-08 | Hitachi Ltd | Atmospheric corrosion testing method and atmospheric corrosion testing apparatus |
| CN103776982B (en) * | 2014-01-27 | 2015-09-16 | 甘肃省交通科学研究院有限公司 | Quality formula ground drying and watering cycle experimental provision and experimental technique |
| CN203838145U (en) * | 2014-01-27 | 2014-09-17 | 甘肃省交通科学研究院有限公司 | Quality type geotechnical engineering wetting-drying test device |
| CN203824882U (en) * | 2014-03-28 | 2014-09-10 | 河海大学 | Accelerated durability testing device for drying and watering cycle in quantitatively simulated natural environment |
| CN204679492U (en) * | 2015-06-03 | 2015-09-30 | 中南大学 | The test unit of a kind of quantitative simulation soil body three axle sample drying and watering cycle |
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