CN106644892A - Loadable permeability test device - Google Patents
Loadable permeability test device Download PDFInfo
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- CN106644892A CN106644892A CN201710114021.XA CN201710114021A CN106644892A CN 106644892 A CN106644892 A CN 106644892A CN 201710114021 A CN201710114021 A CN 201710114021A CN 106644892 A CN106644892 A CN 106644892A
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- 230000035699 permeability Effects 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 129
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 238000001704 evaporation Methods 0.000 claims abstract description 10
- 230000008020 evaporation Effects 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims description 26
- 230000003068 static effect Effects 0.000 claims description 25
- 239000011148 porous material Substances 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 7
- 239000002689 soil Substances 0.000 description 63
- 230000008859 change Effects 0.000 description 40
- 230000008595 infiltration Effects 0.000 description 37
- 238000001764 infiltration Methods 0.000 description 37
- 230000035515 penetration Effects 0.000 description 18
- 230000009471 action Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000009490 roller compaction Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a loadable permeability test device. The loadable permeability test device comprises a permeability instrument, a sensor acquiring module, a vertical load loading module, a water level fluctuation module, a dry and wet circulating module and a sample deformation monitoring module, wherein the sensor acquiring module is used for acquiring permeability parameters of a sample; the vertical load loading module is arranged on the top of the permeability instrument and is used for providing vertical load for the sample; the water level fluctuation module is connected to one side of the permeability instrument and is used for simulating tide load; the dry and wet circulating module is connected to the bottom of the permeability instrument and is used for simulating rainfall and evaporation; and the sample deformation monitoring module is arranged on a side of the permeability instrument, and is used for observing and recording deformation of the sample in an experimentation process.
Description
Technical field
The present invention relates to Geotechnical Engineering field, in particular to a kind of infiltration experiment device for loading.
Technical background
Permeameter is usually used in determining the infiltration coefficient of the soil body, belongs to a kind of conventional geotechnique's instrument, the infiltration coefficient of the soil body with
The type of the soil body itself, soil structures, temperature, load state etc. are all closely bound up, sufficiently complex.But existing geotechnological instrument
Device permeameter function is but more single, and existing permeability apparatus can only determine inactive infiltration of the soil body under the situation that do not stress naturally
Characterisitic parameter, it is impossible to the infiltration coefficient situation of change of external loads soil under action body is simulated according to actual conditions, this and reality
Soil body environment is not corresponded, and the actual conditions soil body often by load stress, environmental load, construction plus unloads load action, can cause the soil body
Itself Penetration Signature produces change, and the measure of its infiltration coefficient is also particularly significant, such as in construction project, with building
Build, the load on bottom soil body top is also at change procedure, and the excavation landfill of such as surrounding soil can cause adding for the soil body to be unloaded
Load, adds personnel's discrepancy, vibration equipment and construction loads, can make the soil body often in dead load and the environment of dynamic load
In, the effect of such external loads causes the soil body that compression occurs, and soil body hole by densification, also can by its infiltration coefficient
Change.Again for example for sandy soil, its granular size simultaneously unshifts, and Jing is often considered to have and connects in soil body theory
The sand grains composition of continuous granular size, fine particle has collectively constituted the skeleton of the soil body with bulky grain, in some hydrodynamic environments ten
Where point abundant, for example border on the sea embankment or seabeach ground, hydrodynamic by more frequently water-level fluctuation phenomenon, such as tide
Under effect, the fine particle of sandy soil soil body skeleton is in the presence of flow force, it may appear that flowing, and its position occurs to change accordingly
Become, now the infiltration coefficient of the soil body can also occur corresponding change；The permeance property of the soil body in the case of being not loaded with can only be determined
Change, it is impossible to match with Practical Project background；It is simultaneously frequently regional in some alternations of wetting and drying, there is also the soil body repeatedly
Rainfall vaporization cycle, flowing of the gas in the soil body can cause inside soil body hole change occur, also result in soil body penetration system
Several changes.Therefore, existing permeability test can not determine the virtual condition of the soil body, such as 1, when being vertically subject to load action
Infiltration coefficient changes.2nd, cannot determine near water that water-level fluctuation causes the soil body especially sand grains fine particle stream under environment
It is dynamic, cause its soil structures to change, and the soil body permeability change for causing.3rd, the soil under drying and watering cycle state cannot be determined
The permeability coefficient change of body.4th, the soil body self-deformation under outside load action cannot more be determined.Therefore prior art cannot
The infiltration coefficient situation of change of external loads soil under action body is simulated according to actual conditions.
The content of the invention
Present invention aim to overcome above-mentioned deficiency, there is provided it is a kind of more can actual response earth stress state, can survey
Determine the permeability apparatus for loading of the soil body its own seepage characteristic change under outside load action.
For achieving the above object, the present invention designed by the permeability apparatus for loading, including permeameter and for gather examination
The sensor acquisition module of sample permeability parameters, its feature exists：Also include vertical load load-on module, water-level fluctuation module, dry and wet
Loop module and sample deformation monitoring modular；
The vertical load load-on module is arranged on permeameter top, for providing vertical load for sample；
The water-level fluctuation module is connected to permeameter side, for tide simulation load；
The drying and watering cycle module is connected with permeameter bottom, for simulated rainfall and evaporation；
The sample deformation monitoring modular is arranged on permeameter side, for observing and records change of the sample in experimentation
Shape.
Further, the load of the vertical load load-on module can be Impact Load load, permanent static pressure load or follow
Ring dead load.Existing permeameter can only be determined when being not added with load, the permeance property change of the soil body；But in Practical Project, soil
Body is often subject to various vertical loads, such as Impact Load carry, permanent static pressure load and circulation dead load, the now permeability of the soil body
Can there is certain difference with measured by existing permeameter；The present invention can determine the soil body by Impact Load load, permanent static pressure lotus
Permeance property during dead load is carried or circulates, acquired results are closer to Practical Project.
Further, the concrete structure when load of the vertical load load-on module is carried for Impact Load is：Including
The dc source of circuit connection, the time relay and magnetic valve circuit connection successively successively；Also include the sky of gas circuit connection successively
Air compressor, air pressure pressure regulator valve, switching cylinder and cylinder, the magnetic valve is arranged on switching cylinder, is opened for controlling cylinder
Close, the cylinder is connected with permeameter top.The soil body is often subject to vertical Impact Load load in Practical Project, such as rams process
Deng now the permeance property of the soil body is it may happen that change, and existing permeameter cannot be to the permeance property under the conditions of this
It is measured；To solve this problem, the present invention can apply vertical Impact Load and carry to the soil body, and determine its permeance property
Change, as a result closer to Practical Project.
Yet further, the concrete structure when load of the vertical load load-on module is permanent static pressure load is：Including
Successively the air compressor of gas circuit connection, pressure regulator valve, switching cylinder and cylinder, are provided with control cylinder and open on the switching cylinder
The magnetic valve of pass, the cylinder is connected with permeameter top.The soil body is often subject to permanent static pressure load in Practical Project, is such as compacted
Journey etc., now the permeance property of the soil body is it may happen that change, and existing permeameter cannot be to the permeability under the conditions of this
Can be measured；To solve this problem, the present invention can apply permanent static pressure load to the soil body, and determine the change of its permeance property
Change, as a result closer to Practical Project.
Yet further, the load of the vertical load load-on module is that concrete structure when circulating dead load is：Including
Dc source, electric Proportion valve and function signal generator that successively circuit connects；Also include the air pressure of gas circuit connection successively
Contracting machine, air pressure pressure regulator valve, electric Proportion valve and cylinder, the cylinder is connected with permeameter top.Soil body Jing is normal in Practical Project
By circulating dead load, such as roller compaction process back and forth, now the permeance property of the soil body is it may happen that change, and existing infiltration
Instrument cannot be measured to the permeance property under the conditions of this；To solve this problem, it is quiet that the present invention can apply circulation to the soil body
Load, and the change of its permeance property is determined, as a result closer to Practical Project.
Yet further, the infiltration instrument apparatus include in the transparent cylinder with bottom surface, the transparent cylinder from it is lower to
On be sequentially provided with bottom permeable stone, sample, top permeable stone and loading lid, transparent cylinder bottom top and bottom are respectively provided with
There are cylinder water inlet and cylinder delivery port, three equidistant pressure taps are provided with the wall of the transparent cylinder side.The present invention is adopted
With transparent cylinder, the change of the soil body in observable process of the test, and existing permeameter cannot observe soil body change；Existing infiltration
Instrument is poor by the water pressure that three vertical transparent water level pipes measure the soil body, can only adopt PRECISION HOLE by artificial reading, the present invention
Gap water pressure sensor measures the water pressure of the soil body, and by computer recording, reduces the error that artificial reading is produced, more just
Just.
Yet further, the water-level fluctuation module includes water tank, and the water tank bottom is connected with lifting platform, the lifting
Platform bottom is connected with electric pushrod, and by controller control, and by driver drives, the water tank is tubular knot to the electric pushrod
Structure, water tank side wall is disposed with from top to bottom water tank inlet, water tank gap and water outlet of water tank, the water outlet of water tank
It is connected with the water inlet of permeameter.Existing permeameter is only capable of from top adding water, it is impossible to control the SEA LEVEL VARIATION of the soil body, and real
In engineering, the water level Jing in the soil body often changes；To solve this problem, the present invention is realized to soil by water-level fluctuation module
In vivo SEA LEVEL VARIATION is controlled, the environmental change of the soil body closer in Practical Project.
Yet further, the drying and watering cycle module includes PID temperature control systems and three-way valve, described three-way valve one end
For connecting permeameter delivery port, one end is connected with PID temperature control systems, and the other end is used to connect water-level fluctuation module delivery port.
The soil body is often subject to drench with rain and day Sai in Practical Project, and the soil body experienced the circulation change of dry and wet, now the permeance property of the soil body
It may happen that change, and existing permeameter cannot be measured to the permeance property under the conditions of this；Ask to solve this
Topic, the present invention can apply drying and watering cycle to the soil body, for water content of soil change caused by simulated rainfall and evaporation, and determine
The change of its permeance property, as a result closer to Practical Project.
Yet further, the sample deformation monitoring modular include high-definition camera and connect at an angle for a pair it is flat
Face mirror, the high-definition camera and level crossing it is positioned opposite, be arranged on permeameter both sides.Existing permeameter cannot monitoring test mistake
The deformation of the soil body in journey, the deformation of the soil body in present invention energy real-time monitoring process of the test is different environmental factors to the soil body
Permeance property affect provide test basis.
The present invention compared with prior art, with advantages below：
1st, Impact Load load, permanent static pressure load and circulation dead load are applied to sample by vertical load module.And traditional penetration
Device is compared, and the present invention can be contrasted to infiltration coefficient before and after sample load, draw the size of load, frequency, the time and
Impact of the load mode to sample infiltration coefficient；Traditional penetration device is only capable of measuring sample infiltration coefficient during setting-out.
2nd, the present invention can carry out drying and watering cycle to sample, for simulated rainfall and evaporation.Compare with traditional penetration device, this
Invention can be contrasted to infiltration coefficient before and after sample drying and watering cycle, draw number of times, frequency and the time of drying and watering cycle to examination
The impact of sample infiltration coefficient；Traditional penetration device is only capable of measuring sample infiltration coefficient during setting-out, and has one under natural environment
Fixed difference, have impact on the accuracy of permeability parameters.
3rd, the present invention can carry out water-level fluctuation to sample, for the fluctuation of tide simulation.Compare with traditional penetration device, this
Invention can to sample water-level fluctuation circulation before and after infiltration coefficient contrast, draw water-level fluctuation circulate number of times, frequency and
Impact of the time to sample infiltration coefficient；Traditional penetration device is only capable of measuring sample infiltration coefficient during setting-out.
4th, deformation of the observable sample of the present invention in process of the test.The present invention is by sample deformation monitoring modular to sample
In vertical load, drying and watering cycle, the sample deformation in the fluctuating procession of the water level is observed.The change of sample can clearly be seen.
And traditional penetration device cannot observed and recorded sample deformation.
5th, the present invention is connected collection with computer and records test data by sensor acquisition module, can gather continuous
Data variation so that the test data of collection is more accurate, and traditional penetration device can only measure instantaneous data.
Description of the drawings
Fig. 1 is the permeability apparatus structural representation that the present invention can be loaded.
Fig. 2 is permeameter structural representation.
Fig. 3 is vertical impact load connected mode structural representation.
Fig. 4 is vertical constant pressure dead load connected mode structural representation.
Fig. 5 is vertical circulation static pressure load connected mode structural representation.
Fig. 6 is water-level fluctuation modular structure schematic diagram.
Fig. 7 is PID temperature control system structural representations.
Fig. 8 is triple valve structural representation in the present invention.
Fig. 9 is drying and watering cycle structural representation.
Figure 10 is sample deformation monitoring modular structural representation.
Figure 11 is sensor acquisition module structural representation.
Wherein：Sample A, permeameter 100, transparent cylinder 101, bottom permeable stone 102a, top permeable stone 102b, circle with holes
Ring 103, loads lid 104, pressure tap 101b, vertical load load-on module 200, baric systerm 210, air compressor 211, air pressure
Pressure regulator valve 212, switching cylinder 213, cylinder 214, dc source 221, electric Proportion valve 222, function signal generator 223, electricity
Magnet valve 224, the time relay 225, water-level fluctuation module 300, water tank 301, lifting platform 302, electric pushrod 303, case water inlet
310a, water tank gap 310b, water outlet of water tank 310c, driver 304, controller 305, drying and watering cycle module 400, PID temperature
Control system 410, blower fan 411, heating wire 412, temperature detect switch (TDS) 413, three-way valve 420, sample deformation monitoring modular 500, high definition
Camera 501, level crossing 502, sensor acquisition module 600, accurate pore water pressure sensor 601, flowmeter 602.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail with specific embodiment：
The permeability apparatus for loading as shown in Figure 1, including permeameter 100 and the sensor for gathering sample permeability parameters adopt
Collection module 600, its feature exists：Also include vertical load load-on module 200, water-level fluctuation module 300, drying and watering cycle module 400
With sample deformation monitoring modular 500；
The vertical load load-on module 200 is arranged on the top of permeameter 100, for providing vertical load for sample；
The water-level fluctuation module 300 is connected to the side of permeameter 100, for tide simulation load；
The drying and watering cycle module 400 is connected with the bottom of permeameter 100, for simulated rainfall and evaporation；
The sample deformation monitoring modular 200 is arranged on the side of permeameter 100, for observing and records sample in experimentation
Deformation.
1st, permeameter
As shown in Fig. 2 permeameter 100 includes being set successively from top to bottom in the transparent cylinder 101 with cylinder bottom, transparent cylinder 101
There are bottom permeable stone 102a, Sample A, top permeable stone 102b, annulus with holes 103 and loading lid 104, the top of transparent cylinder 101
Cylinder water inlet 101a and cylinder delivery port 101c are respectively arranged with bottom, on the side wall of transparent cylinder 101 three etc. are provided with
The pressure tap 101b of spacing.
The operation principle of permeameter 100：Water is entered from permeameter water inlet 101a, is flowed out from permeameter delivery port 101c；When
During stable level, by the record data of sensor acquisition module 600, it is transferred to computer and calculates infiltration coefficient.
2nd, vertical load load-on module
Vertical load load-on module 200 includes the gentle piezoelectricity path control system of baric systerm 210 being connected with each other；Air pressure circuit control
System processed controls baric systerm 210.
1）, baric systerm 210
Described baric systerm 210 includes air compressor 211, air pressure pressure regulator valve 212, the and of switching cylinder 213 being sequentially connected
Cylinder 214.
2）, air pressure circuit control system
Described air pressure circuit control system includes dc source 221, electric Proportion valve 222, function signal generator 223, electricity
Magnet valve 224 and the time relay 225；
Specific embodiment is as follows：Baric systerm 210 provides power source, passes sequentially through loading lid 104 and annulus with holes 103 applies
To on permeable stone 102 and sample.Air pressure circuit control system controlled loading mode, applying size and application time.By impact
Load connected mode, constant pressure static pressure load connected mode and circulation static pressure load three kinds of gas circuit circuit connecting modes of connected mode can
To apply impact load, permanent static pressure load and circulation static pressure load to sample.
Wherein, when the load of vertical load load-on module 200 is carried for Impact Load, concrete structure as shown in Figure 3 is：Bag
Include the dc source 221 of circuit connection, the time relay 225 and magnetic valve 224 circuit connection successively successively；Also include gas successively
Air compressor 211, air pressure pressure regulator valve 212, switching cylinder 213 and cylinder 214 that road connects, magnetic valve 224 is arranged on cylinder
On switch 213, for controlling switching cylinder 213, cylinder 214 is connected with the top of permeameter 100.The impact load connected mode
Operation principle is：Magnetic valve 224 is controlled by the time relay 225, and the time relay 225 can pass through time control solenoid valve 224
Break-make, so as to control the flexible of cylinder 214；
When the load of vertical load load-on module 200 is permanent static pressure load, concrete structure as shown in Figure 4 is：Including successively
Air compressor 211, air pressure pressure regulator valve 212, switching cylinder 213 and cylinder 214 that gas circuit is connected, on the switching cylinder 213
The magnetic valve 224 of control switching cylinder is provided with, the cylinder 214 is connected with the top of permeameter 100.The constant pressure static pressure load
Connected mode operation principle is：The output pressure of the adjustable air compressor 211 of air pressure pressure regulator valve 212, so as to apply dead load.
When the load of vertical load load-on module 200 is to circulate dead load, concrete structure as shown in Figure 6 is：Including
Dc source 221, electric Proportion valve 222 and function signal generator 223 that successively circuit connects；Also connect including gas circuit successively
Air compressor 211, air pressure pressure regulator valve 212, electric Proportion valve 222 and cylinder 214, the cylinder 214 pushes up with permeameter 100
Portion connects.The circulation static pressure load connected mode operation principle is as follows：
The effect of function signal generator 213 is to provide the voltage signal of change；The effect of electric Proportion valve 222 is to receive electricity
Change the size of delivery air pressure value after pressure signal, be characterized in the linear change of voltage signal, there is provided linear change
Air pressure；Circulation static pressure load connected mode can be controlled size and the cycle of cyclic load by function signal generator 223.
3rd, water-level fluctuation module
Water-level fluctuation module 300 includes water tank 301, and the bottom of the water tank 301 is connected with flat lifting platform 302, the liter
Drop platform 302 bottom is connected with electric pushrod 303, and the electric pushrod 303 is controlled by controller 304, and is driven by driver 305
Dynamic, the water tank 301 is cylinder-like structure, and water tank side wall is disposed with from top to bottom water tank inlet 310a, water tank spilling water
Mouth 310b and water outlet of water tank 310c, the water outlet of water tank 310c are connected with cylinder water inlet 101a.Electric pushrod 303 is logical
Appliance, the bottom of electric pushrod 303 and horizontal plane are fixed, and the lifting of electric pushrod 303 is controlled by driver 304 and controller 305.
Timing is capable of achieving by driver 304 and controller 305, the water tank 301 of set a distance is lifted, water tank gap 301b
The height of water level of a height of water tank 301, water tank inlet 301a is connected with laboratory water pipe, water outlet of water tank 301c and permeameter
Water inlet 101a be connected, can be test infiltration coefficient measurement test provide fixation water level；Water outlet of water tank 301c and infiltration
The cylinder delivery port 101c of instrument is connected, and is capable of achieving the water-level fluctuation of sample.
4th, drying and watering cycle module
As shown in Figure 8,9, 10, drying and watering cycle module 400 includes PID temperature control systems 410 and three-way valve 420, the triple valve
420 one end of door are used to connect the cylinder delivery port 101c of permeameter, and one end is connected with PID temperature control systems 410, and the other end is used to connect
Meet the water outlet of water tank 310c of water-level fluctuation module.
The PID temperature control systems 410 are a heating system, including blower fan 411, heating wire 412, temperature detect switch (TDS) 413；
Blower fan 411 when being powered can blow out air forward, and regulating wind power size；Blower fan can heat sky built with heating wire 412
Gas, makes blower fan 411 blow out the air of uniform temperature；Temperature detect switch (TDS) 413 can control the temperature of blow out air.
Drying and watering cycle module operation principle：Open the cylinder delivery port 101c and water-level fluctuation module water tank 301c of permeameter
Valve when, in the saturating instrument 101 of the water infiltration in water tank 301, make Sample A saturation；Open the cylinder delivery port 101c of permeameter
During with the valve of PID temperature control systems 410, PID temperature control systems 410 are blown into the air of uniform temperature in permeameter 100 so that examination
Moisture evaporation in sample, so as to realize drying and watering cycle.
5th, sample deformation monitoring modular
Sample deformation monitoring modular 500 includes the level crossing 502 that high-definition camera 501 and a pair connect at an angle, described
High-definition camera 501 and level crossing 502 are positioned opposite, are arranged on the both sides of permeameter 100.
High-definition camera 501 is placed on the front of permeameter 100, using level crossing 502, can shoot Sample A in process of the test
The deformation of all directions.
Sample deformation monitoring modular operation principle：The Sample A deformation of sample all directions is recorded by high-definition camera 501,
It is easy to observation.
6th, sensor acquisition module
Sensor acquisition module 600 includes accurate pore water pressure sensor 601 and flowmeter 602, the accurate pore water pressure
Force snesor 601 is arranged on the pressure tap 101b of permeameter, the cylinder delivery port 101c phases of the flowmeter 602 and permeameter
Even, the accurate pore water pressure sensor 601 and flowmeter 602 are connected with outer computer, for collecting storage measurement
Parameter.
Sensing acquisition module operation principle：Tested using accurate pore water pressure sensor 601 and the measurement of flowmeter 602
Data, can improve test accuracy, reduce human error.
The drying and watering cycle of water-level fluctuation, rainfall and the evaporation of tide simulation of the present invention, vertical load is provided for sample and is oozed
The method that thoroughly coefficient is measured：
1st, water-level fluctuation method
Water outlet of water tank 301c is connected with permeameter delivery port 101c, and water tank inlet 301a is connected with laboratory water pipe；It is logical
Cross controller 304 arrange electric pushrod 303 it is flexible away from discrete time, make the water level of Sample A in permeameter 100 with water tank 301
Lifting change；The change of water level can be observed by transparent cylinder 101.
2nd, drying and watering cycle method
The one end of three-way valve 420 connects permeameter delivery port 101c, and one end connects PID temperature control systems 410, one end connection water level ripple
Dynamic model block delivery port 301c, water-level fluctuation module 300 provides certain hydraulic pressure.
When opening the valve of permeameter delivery port 101c and water-level fluctuation module delivery port 301c, the current in water tank 301
In entering permeameter 100, Sample A saturation is made；When opening the valve of permeameter delivery port 101c and PID temperature control system 410, PID temperature
Control system 410 is blown into the air of uniform temperature in permeameter 100 so that the moisture evaporation in Sample A, so as to realize that dry and wet is followed
Ring.
3rd, vertical load applying method
Vertical load is applied with three kinds of modes：Vertical impact load, vertical perseverance static pressure load and vertical circulation static pressure load.
1）Vertical impact load
By the connection of vertical impact load connected mode, the time relay 225 and switching cylinder 213, the composition timing electricity of magnetic valve 224
Control switching circuit such as Fig. 3, according to impact load frequency, can control the make-and-break time of magnetic valve 224, so as to indirect control cylinder
Switch 213, further controls stretching out and withdrawal duration for the piston of cylinder 214, with the impact load in simulated environment.
2）Vertical perseverance static pressure load
Such as Fig. 4, connect by vertical permanent static pressure load connected mode, open air compressor 211, set by air pressure pressure regulator valve 212
Required air pressure value is put, pneumatic loading system is started working, and cylinder 214 applies under the promotion of air pressure to Sample A
Dead load, such as need to over time adjust the pressure value size of cylinder 214, only need to adjust pressure regulator valve so as to reach corresponding pressure
Force value.
3）Vertical circulation static pressure lotus
By vertical circulation static pressure load connected mode connection, such as Fig. 6, the cardinal principle that required linear electric-controlled switch is further applied load
It is：Dc source 221 is powered to electric Proportion valve 222.Electric Proportion valve 222 can change under external voltage signal effect and pass through
The air-flow atmospheric pressure value size of switch.
The effect of function signal generator 223 is the voltage signal for exporting a linear change, and voltage signal acts on electricity
Gas proportioning valve 222.
By the voltage change function for being manually set signal generator 223, further controlled by electric Proportion valve 222 defeated
Enter the pressure value size to cylinder 214, realize the applying of linear load.
4th, osmotic coefficient measurement method
Sensing acquisition module 600 is connected, water outlet of water tank 301c is connected with permeameter water inlet 101a, flowmeter 602 and permeated
Instrument delivery port 101c is connected.Water outlet of water tank 301c is opened, water is flowed out, in instrument to be infiltrated 100 during stable level, record is accurate
The numerical value of pore water pressure sensor 601 and flowmeter 602, calculates test infiltration coefficient.
Advantages of the present invention is as follows：
1st, Impact Load load, permanent static pressure load and circulation dead load are applied to sample by vertical load module.And traditional penetration
Device is compared, and the present invention can be contrasted to infiltration coefficient before and after sample load, draw the size of load, frequency, the time and
Impact of the load mode to sample infiltration coefficient；Traditional penetration device is only capable of measuring sample infiltration coefficient during setting-out.
2nd, the present invention can carry out drying and watering cycle to sample, for simulated rainfall and evaporation.Compare with traditional penetration device, this
Invention can be contrasted to infiltration coefficient before and after sample drying and watering cycle, draw number of times, frequency and the time of drying and watering cycle to examination
The impact of sample infiltration coefficient；Traditional penetration device is only capable of measuring sample infiltration coefficient during setting-out, and has one under natural environment
Fixed difference, have impact on the accuracy of permeability parameters.
3rd, the present invention can carry out water-level fluctuation to sample, for the fluctuation of tide simulation.Compare with traditional penetration device, this
Invention can to sample water-level fluctuation circulation before and after infiltration coefficient contrast, draw water-level fluctuation circulate number of times, frequency and
Impact of the time to sample infiltration coefficient；Traditional penetration device is only capable of measuring sample infiltration coefficient during setting-out.
4th, deformation of the observable sample of the present invention in process of the test.The present invention is by sample deformation monitoring modular to sample
In vertical load, drying and watering cycle, the sample deformation in the fluctuating procession of the water level is observed.The change of sample can clearly be seen.
And traditional penetration device cannot observed and recorded sample deformation.
5th, the present invention is connected collection with computer and records test data by sensor acquisition module, can gather continuous
Data variation so that the test data of collection is more accurate, and traditional penetration device can only measure instantaneous data.
Claims (10)
1. a kind of permeability apparatus for loading, including permeameter（100）Gather with the sensor for being used to gather sample permeability parameters
Module（600）, it is characterised in that：Also include vertical load load-on module（200）, water-level fluctuation module（300）, drying and watering cycle mould
Block（400）With sample deformation monitoring modular（500）；
The vertical load load-on module（200）It is arranged on permeameter（100）Top, for providing vertical load for sample；
The water-level fluctuation module（300）It is connected to permeameter（100）Side, for tide simulation load；
The drying and watering cycle module（400）With permeameter（100）Bottom connects, for simulated rainfall and evaporation；
The sample deformation monitoring modular（200）It is arranged on permeameter（100）Side, for observing and records sample and was testing
Deformation in journey.
2. the permeability apparatus for loading according to claim 1, it is characterised in that：The vertical load load-on module
（200）Load can carry for Impact Load, permanent static pressure load or circulation dead load.
3. the permeability apparatus for loading according to claim 2, it is characterised in that：The vertical load load-on module
（200）Concrete structure of load when carrying for Impact Load be：Including the dc source of the connection of circuit successively（221）, the time after
Electrical equipment（225）And magnetic valve（224）Circuit connection successively；Also include the air compressor of gas circuit connection successively（211）, air pressure adjust
Pressure valve（212）, switching cylinder（213）And cylinder（214）, the magnetic valve（224）Installed in switching cylinder（213）On, it is used for
Control switching cylinder（213）, the cylinder（214）With permeameter（100）Top connection.
4. the permeability apparatus for loading according to claim 3, it is characterised in that：The vertical load load-on module
（200）Concrete structure of load when being permanent static pressure load be：Including the air compressor of the connection of gas circuit successively（211）, air pressure
Pressure regulator valve（212）, switching cylinder（213）And cylinder（214）, the switching cylinder（213）On be provided with control switching cylinder
Magnetic valve（224）, the cylinder（214）With permeameter（100）Top connection.
5. the permeability apparatus for loading according to claim 4, it is characterised in that：The vertical load load-on module
（200）Load be circulate dead load when concrete structure be：Including the dc source of the connection of circuit successively（221）, electric ratio
Example valve（222）And function signal generator（223）；Also include the air compressor of gas circuit connection successively（211）, air pressure pressure regulator valve
（212）, electric Proportion valve（222）And cylinder（214）, the cylinder（214）With permeameter（100）Top connection.
6. the permeability apparatus for loading according to any one of claim 3 ~ 5, it is characterised in that：The permeameter
（100）Including the transparent cylinder with cylinder bottom（101）, the transparent cylinder（101）It is permeable that bottom is inside sequentially provided with from top to bottom
Stone（102a）, sample（A）, top permeable stone（102b）, annulus with holes（103）With loading lid（104）, the transparent cylinder
（101）Top and bottom are respectively arranged with cylinder water inlet（101a）With cylinder delivery port（101c）, the transparent cylinder（101）
Three equidistant pressure taps are provided with the wall of side（101b）.
7. the permeability apparatus for loading according to claim 6, it is characterised in that：The water-level fluctuation module（300）Bag
Include water tank（301）, the water tank（301）Bottom is connected with lifting platform（302）, the lifting platform（302）Bottom is connected with electronic
Push rod（303）, the electric pushrod（303）By controller（304）Control, and by driver（305）Drive, the water tank
（301）For tubular structure, water tank side wall is disposed with from top to bottom water tank inlet（310a）, water tank gap（310b）With
Water outlet of water tank（310c）, the water outlet of water tank（310c）With cylinder water inlet（101a）Connection.
8. the permeability apparatus for loading according to claim 7, it is characterised in that：The drying and watering cycle module（400）Bag
Include PID temperature control systems（410）And three-way valve（420）, the three-way valve（420）One end is used to connect the cylinder of permeameter and goes out
The mouth of a river（101c）, one end and PID temperature control systems（410）Connection, the other end is used to connect the water outlet of water tank of water-level fluctuation module
（310c）.
9. the permeability apparatus for loading according to claim 8, it is characterised in that：The sample deformation monitoring modular
（500）Including high-definition camera（501）With the level crossing for connecting at an angle for a pair（502）, the high-definition camera（501）
And level crossing（502）It is positioned opposite, it is arranged on permeameter（100）Both sides.
10. the permeability apparatus for loading according to claim 9, it is characterised in that：The sensor acquisition module（600）
Including accurate pore water pressure sensor（601）And flowmeter（602）, the accurate pore water pressure sensor（601）Install
In the pressure tap of permeameter（101b）On, the flowmeter（602）With the cylinder delivery port of permeameter（101c）It is connected, it is described
Accurate pore water pressure sensor（601）And flowmeter（602）It is connected with outer computer, for collecting storage measurement ginseng
Number.
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| CN108007780A (en) * | 2017-10-26 | 2018-05-08 | 华南理工大学 | The analogy method and device of wetting-drying test under roadbed side slope triaxial stress state |
| CN109001098A (en) * | 2018-08-07 | 2018-12-14 | 西南大学 | A kind of instantaneous Penetration Signature tester of soil and soil infiltration characteristics calculation method |
| CN109060637A (en) * | 2018-09-19 | 2018-12-21 | 北京交通大学 | Unsaturated soil apparatus for measuring permeability coefficient |
| CN109087569A (en) * | 2018-09-04 | 2018-12-25 | 深圳大学 | A method of the simulation test device of research reinforcing side slope effect and determining slope reinforcement scheme |
| CN109596501A (en) * | 2019-01-29 | 2019-04-09 | 辽宁工程技术大学 | Top board seepage experimental rig and method under the influence of a kind of dynamic load |
| CN110565706A (en) * | 2019-09-10 | 2019-12-13 | 合肥工业大学 | Device of foundation ditch infiltration under simulation morning and evening tides effect |
| CN114034618A (en) * | 2021-10-25 | 2022-02-11 | 浙江理工大学 | Infiltration post is convenient for remove and flood peak adjustable area hits real hammer MBT rubbish permeameter |
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| CN107167410A (en) * | 2017-06-01 | 2017-09-15 | 三峡大学 | A kind of periodicity comes and goes seepage experimental apparatus and method |
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| CN109001098A (en) * | 2018-08-07 | 2018-12-14 | 西南大学 | A kind of instantaneous Penetration Signature tester of soil and soil infiltration characteristics calculation method |
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| CN109087569B (en) * | 2018-09-04 | 2019-06-04 | 深圳大学 | A method of slope reinforcement scheme is determined using simulation test device |
| CN109087569A (en) * | 2018-09-04 | 2018-12-25 | 深圳大学 | A method of the simulation test device of research reinforcing side slope effect and determining slope reinforcement scheme |
| CN109060637A (en) * | 2018-09-19 | 2018-12-21 | 北京交通大学 | Unsaturated soil apparatus for measuring permeability coefficient |
| CN109596501A (en) * | 2019-01-29 | 2019-04-09 | 辽宁工程技术大学 | Top board seepage experimental rig and method under the influence of a kind of dynamic load |
| CN109596501B (en) * | 2019-01-29 | 2023-08-22 | 辽宁工程技术大学 | Roof seepage test device and method under influence of dynamic load |
| CN110565706A (en) * | 2019-09-10 | 2019-12-13 | 合肥工业大学 | Device of foundation ditch infiltration under simulation morning and evening tides effect |
| CN114034618A (en) * | 2021-10-25 | 2022-02-11 | 浙江理工大学 | Infiltration post is convenient for remove and flood peak adjustable area hits real hammer MBT rubbish permeameter |
| CN114034618B (en) * | 2021-10-25 | 2024-05-17 | 浙江理工大学 | MBT garbage permeameter with compaction hammer and adjustable water head and convenient to move permeable column |
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