CN108106904A - Prepare device and its application of specific moisture content soil sample - Google Patents
Prepare device and its application of specific moisture content soil sample Download PDFInfo
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- CN108106904A CN108106904A CN201810035736.0A CN201810035736A CN108106904A CN 108106904 A CN108106904 A CN 108106904A CN 201810035736 A CN201810035736 A CN 201810035736A CN 108106904 A CN108106904 A CN 108106904A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The present invention provides a kind of device for preparing specific moisture content soil sample and its application, belongs to Geotechnical Engineering field.The device includes preparation of soil sample device, water receiver, data acquisition storage processor and real-time control system, and wherein preparation of soil sample device includes water spray controller, dry ground sprinkler, gravity sensor and soil sample holder again；The device sprays paving by the layering of soil layer, sprays water with reference to layering, achievees the effect that soil moisture content homogeneous constant.For example and without limitation, compared with prior art, the beneficial effects of the present invention are：The present invention can preferably control the uniformity coefficient of soil moisture content, it is particularly possible to solve to lump during the specific moisture content preparation of soil sample agglomerating, moisture content is uneven, and human factor influences the problems such as big.Suitable for loess, sandy soil, especially swelled ground, the easily preparation of the stickiness soil sample of conglomeration.
Description
Technical field
The invention belongs to geotechnical engineering fields, are related to a kind of device for preparing specific moisture content soil sample and its application.
Background technology
It is many national in the world at present, including China, engineering construction activity all is being carried out, it must be to ground before engineering construction
Soil has enough understandings.Laboratory test is one of main method for understanding soil mass property, and many laboratory tests are carrying out testing it
The preceding soil sample that first prepare specific moisture content.How fast and efficiently to prepare the soil sample of the specific moisture content of high quality, be into
It first has to solve the problems, such as before other laboratory tests of row.
At present, the soil sample for preparing specific moisture content mainly mixes method thoroughly using manual.The method of mixing thoroughly is by certain mass by hand
Dry ground is placed in container, then according to needed for being calculated dry ground quality and moisture content water quality, be then spilled into container
The water of required quality is stirred when spilling.Although this method can prepare the soil sample of specific moisture content, hold in preparation process
Easily there is agglomerating phenomenon of luming, even more so particularly with cohesive soil, the moisture content for directly resulting in made soil sample is uneven；The party
During method sample preparation, soil sample is directly contacted with air, in the case where being air-dried, can accelerate moisture evaporation in whipping process,
Made Water Content Tests in Soil Samples is caused to be not allowed；Dust raising phenomenon is susceptible in this method sample making course, it is unfavorable to health；Finally, the party
Method preparation process automation degree is very low, and human factor influence is bigger, this can also directly affect the accuracy of sample preparation moisture content.
Therefore, the soil of high quality is prepared there is an urgent need for developing a kind of new device for preparing specific moisture content soil sample with quickly, efficiently and accurately
Sample.
The content of the invention
It is an object of the present invention to overcome the deficiencies of the prior art and provide a kind of device for preparing specific moisture content soil sample
And its application, suitable for the preparation of soil sample of specific moisture content, and the preparation of stickiness soil sample is particularly suitable for, the device is for by hand
It mixes method thoroughly and prepares that soil sample caking is agglomerating, Water Content Tests in Soil Samples is uneven, Water Content Tests in Soil Samples is not allowed, to healthy unfavorable, human factor shadow
Ringing the deficiencies of bigger can effectively solve.
In order to achieve the above objectives, solution of the invention is：
A kind of device for preparing specific moisture content soil sample, the preparation of soil sample device, water receiver, data which includes closing are adopted
Collection storage processor and real-time control system；Wherein, the preparation of soil sample device of closing again include dry ground sprinkler, water spray controller,
Soil sample holder and gravity sensor.
Soil sample holder is the container of upper opening, is used to place soil sample；Dry ground sprinkler and water spray controller are located at
The top of soil sample holder, uniformly to spray single-layer soil and water repeatedly into soil sample holder respectively；Gravity sensor to
Weigh the quality of soil sample in soil sample holder.
Further, the top of preparation of soil sample device must cover head cover when preparing soil sample, there are one head cover so as to keep
Preparation of soil sample device is closed.
Water spray controller is connected with water receiver, and is full of water in spray water controller and water receiver；Water is provided in water receiver
Pressure sensor, hydraulic pressure sensor are connected with data acquisition storage processor, and the hydraulic pressure in water receiver and water spray controller is real
When pass to data acquisition storage processor.
Further, which further includes air compressor, air bag is provided in water receiver, air compressor is by being placed in storage
Air bag in hydrophone is connected with water receiver.Conversion from from air pressure to hydraulic pressure can be realized by air bag, when in real-time control system
When the pressure of feedback is less than pre-set hydraulic pressure Po, real-time control system can control air compressor to pressurize to increase water
Pressure, on the contrary water pressure can be reduced, until hydraulic pressure, which is equal to, pre-sets value.
Data acquisition stores processor to record travel speed Vt, the moisture content of default hydraulic pressure Po, dry ground sprinkler
H, the length L of the mass M o of required soil sample, soil sample holder；Data acquisition storage processor is connected with gravity sensor, is also used
With according to setting moisture content H, the mass M t and default hydraulic pressure Po of newly-increased individual layer dry ground, the length of soil sample holder every time
L calculates the travel speed Vs of the mass M s to spray water every time and water spray controller during each water spray.
Data acquisition storage processor is connected with real-time control system, and is recorded and calculated the data message of gained
It is transferred to real-time control system；Real-time control system is connected respectively with dry ground sprinkler, water spray controller, dry ground to be controlled to spray
Device is spilt to drive towards opposite side from the one side above soil sample holder with default travel speed Vt and uniformly spray in soil sample holder
It spills one layer of dry ground or is sailed to control water spray controller with calculating one sides of the travel speed Vs of gained above soil sample rice packing device
The water of corrresponding quality Ms is uniformly sprayed to opposite side and in soil sample holder.
Meanwhile real-time control system is also connected with air compressor, and water receiver and water spray are ensured by air compressor
Hydraulic pressure P in controller maintains preset value Po always in the entire experiment process, and ensures the water discharge rate of water spray controller
Vp is constant.When water pressure invariableness, for the characteristic pipeline of specific position, its water discharge rate is necessarily constant.
In a preferred embodiment, dry ground sprinkler is a strip funnel, such as can be a strip stainless steel
Funnel；Real-time control system can control dry ground sprinkler to be contained along perpendicular to the direction of bar shaped with constant speed from soil sample
It puts the one side above device to spill to opposite side, so as to ensure that the dry ground thickness for falling into soil sample holder is uniform.
The size of the travel speed combination soil particle of dry ground sprinkler determines that soil particle is bigger, and lower leakage speed is slower, traveling
Speed can set suitably smaller；Soil particle is smaller, and lower leakage speed is faster, and travel speed can set suitably big by one
A bit；The maximum particle diameter of soil particle is necessarily less than funnel aperture, is fallen with ensureing that dry ground is smoothly stablized；When the maximum particle diameter of soil particle
During more than funnel aperture, it may be considered that replace the dry ground sprinkler of large aperture.
In a preferred embodiment, controller is sprayed water as one side wall cylindrical tube with holes, such as can laterally set
The cylindrical stainless steel tube put, real-time control system can control water spray controller with constant speed, along perpendicular to steel pipe
Axially direction, the one side above soil sample holder are sprayed onto opposite side, so as to ensure the uniformity of spray water.
Data storage processing device can calculate water discharge rate Vp according to default hydraulic pressure Po, and specific formula for calculation is as follows：
Water discharge rate
Wherein：γwFor the severe of water；
Then will spray water mass M s divided by water discharge rate Vp, you can to draw water spraying time t, then with water spray controller from
One side above soil sample holder is moved to the stroke L (the namely length of soil sample rice packing device) divided by water spray of opposite side institute conduct
Time t, you can be calculated water spray controller travel speed Vs, then by real-time control system control water spray controller with
It calculates one sides of the constant travel speed Vs of gained above soil sample holder and drives towards opposite side, to ensure that being spilled into soil sample holds
The water of device is uniform, and the quality of spray water is accurate.
Hydraulic pressure in water receiver is set according to the default moisture content H of soil sample, and general moisture content H is higher, and hydraulic pressure Po is set
It is higher, it can so ensure that the water discharge rate of water spray controller is bigger.
Further, spray water and be provided with gas vent at the top of controller, gas vent is provided at the top of water receiver, water receiver
Bottom is provided with row (into) water hole.
The present invention also provides prepare application of the device of specific moisture content soil sample in the preparation of soil sample：
(S1) water will be filled in water receiver and water spray controller, empties air, stored by hydraulic pressure sensor, data acquisition
Processor and real-time control system ensure the hydraulic pressure in water receiver and water spray controller to pre-set value, and are tested entirely
It is remained unchanged in journey；
(S2) enough dry ground are put into dry ground sprinkler, the head cover of preparation of soil sample device is covered, real-time control system control
Dry ground sprinkler processed is moved to opposite side with one side of the pre-set constant speed above soil sample holder, and dry ground is spilled into soil
In sample holder, and weighed by gravity sensor at mass transfer to the data acquisition storage for increasing dry ground in soil sample holder newly
It manages in device；
(S3) the mass M t that data acquisition storage processor record newly increases dry ground is combined, is then calculated according to moisture content H
Draw the mass M s of watering needed for next time；According to watering mass M s, hydraulic pressure Po, spray water controller stroke L (soil sample rice packing device
Length) the travel speed Vs of water spray controller is calculated automatically, and the travel speed Vs for controller of spraying water is passed in real time
Control system, real-time control system control water spray controller are sailed with one sides of the corresponding travel speed Vs above soil sample holder
To opposite side, water is uniformly sprayed in soil sample holder, and the matter of soil sample in soil sample holder is weighed by gravity sensor
Amount Mt+s is transferred in data acquisition storage processor；
(S4) it is repeated according to the step of spilling soil-water spray；After the completion of watering, the quality of soil sample M in soil sample holder
During more than required quality of soil sample Mo, experiment can terminate；
(S5) after experiment terminates, real-time control system carries out release to water receiver and water spray controller automatically；Discharge water storage
Water in device and water spray controller；Soil sample infiltration is overnight；Sampling uses.
A kind of preferred application：
(S11) utensil cleaning drying：It takes out dry ground sprinkler and soil sample holder is fully cleaned, cleaning is completed laggard
Then row drying process is installed in preparation of soil sample device；
(S12) it is vented water filling：The gas vent in water receiver and water spray controller is opened, is noted from row (into) water hole of water receiver
Enter pure water, when the gas vent for opening water receiver and controller of spraying water has water spilling, close all gas vents and row's (into)
Water hole；
(S13) dry ground is placed：The quality of dry ground according to needed for being calculated the quality of soil sample Mo of required preparation and moisture content H
Mo ' inserts the dry ground of sufficient amount into dry ground sprinkler, and the head cover of preparation of soil sample device is covered；
(S14) hydraulic pressure Po, dry ground sprinkler travel speed Vt, moisture content H, required quality of soil sample Mo, soil sample holder
The setting of length L：Hydraulic pressure Po in water receiver is set according to the moisture content H of soil sample, and moisture content H is higher, and hydraulic pressure Po setting values are got over
It is high；The size of the travel speed Vt combination soil particles of dry ground sprinkler determines that soil particle is bigger, and travel speed Vt setting values are got over
It is small；Required quality of soil sample Mo is determined according to the scale of follow-up test；The length L of soil sample holder can be held by measuring soil sample
Device determines；Hydraulic pressure Po, dry ground sprinkler travel speed Vt, moisture content H and required quality of soil sample Mo, soil sample holder is determined
Length L after, data acquisition store processor in input this five parameters；
(S15) pressurize：Hydraulic pressure sensor deposits the hydraulic pressure P real-time deliveries in water receiver and water spray controller to data acquisition
Processor is stored up, then the hydraulic pressure P in water spray controller is controlled in real time by real-time control system, ensures water spray controller
In hydraulic pressure P maintain preset value Po always in the entire experiment process；
(S16) soil is spilt：The quality of soil sample holder passes to data acquisition storage processor by gravity sensor and does
Storage；One sides of the travel speed Vt that real-time control system controls dry ground sprinkler to pre-set above soil sample holder
Opposite side is driven towards, after driving towards opposite side, one layer of dry ground has been newly increased in soil sample holder；The quality of soil sample is led in soil sample holder
It crosses gravity sensor and passes to data acquisition storage and processor and store, made the difference with the preceding quality once recorded as newly-increased
The mass M t of one layer of dry ground；
(S17) spray water：Data acquisition stores processor and is counted according to the mass M t and pre-set moisture content H of newly-increased dry ground
The mass M s of spray water needed for drawing is calculated, the water-jet velocity Vs of water spray controller is calculated according to default hydraulic pressure Po, it is specific to count
It is as follows to calculate formula：
Water discharge rate
Wherein：γwFor the severe of water；
Then the row of water spray controller is calculated according to the stroke L of water-jet velocity Vp, water spray mass M s, controller of spraying water
Speed Vs is sailed, and travel speed Vs is passed into real-time control system, real-time control system control water spray controller is with corresponding
Travel speed Vs drives towards opposite side in the one side above soil sample holder；After driving towards opposite side, the quality of soil sample holder passes through
Gravity sensor passes to data acquisition storage processor and stores；
(S18) experiment, which terminates, judges：(S16) (S17) step is iteratively repeated until after the completion of water spray at data acquisition storage
When quality of soil sample M in the soil sample holder that reason device is recorded is more than required quality of soil sample Mo, experiment can terminate；
(S19) release：When experiment terminates, real-time control system 7 can reduce water receiver and the water in controller of spraying water automatically
Pressure；
(S20) draining：After the completion of release, gas vent is opened successively and row (into) water hole carries out complete draining；
(S21) soil sample infiltrates：Soil sample continues to be placed in soil sample holder, and infiltration is overnight；
(S22) sample：When follow-up test needs, the soil sample use after the completion of infiltration is taken out from soil sample holder.
By adopting the above scheme, the beneficial effects of the invention are as follows：
1. the method that the present invention spills soil layering water spray using layering, compare for traditional craft mixes method thoroughly, the party
Method need not be stirred the soil body, it is not easy to agglomerating phenomenon of luming occur, Water Content Tests in Soil Samples is uniform, solves traditional-handwork and mixes
Even method prepares agglomerating, the non-uniform problem of Water Content Tests in Soil Samples of soil sample caking.
2. sample making course of the present invention is carried out in the preparation of soil sample device of closing, native unlike traditional-handwork mixes method thoroughly
Sample is directly contacted with air, and this method sample making course will not cause moisture evaporation, is solved traditional-handwork and is mixed method preparation soil sample thoroughly
The problem of moisture content inaccuracy.
3. sample making course of the present invention is carried out in the preparation of soil sample device of closing, sample making course will not cause to produce in air
Raw dust raising phenomenon, will not damage to the health of sample preparation personnel.
4. the present invention is in addition to dress dry ground, water filling and draining, remaining test procedure is automatically performed, the degree of automation
Compare high, can greatly reduce the influence of human error, solve traditional-handwork and mix the influence of method human factor thoroughly and compare
Big deficiency.
5. the present invention is a set of detachable, recycling device, structure composition is relatively simple, safeguards that use is very square
Just.
Description of the drawings
Fig. 1 is the schematic diagram of the device of the present invention for preparing specific moisture content soil sample.
Figure label：3. soil sample holder of controller, 4. gravity sensor, the 5. soil sample system 1. dry ground sprinkler 2. is sprayed water
10. air bag of standby device 6. data acquisition storage processor 7. real-time control system, 8. air compressor, 9. water receiver, 11. water
12. gas vent of pressure sensor 13. row (into) water hole.
Specific embodiment
Below in conjunction with specific embodiment and its attached drawing to the device provided by the invention for preparing specific moisture content soil sample and
Its technical solution applied is described further.With reference to following explanation, advantages and features of the invention will be apparent from.
It should be noted that the embodiment of the present invention has preferable implementation, it is not to any type of limit of the present invention
It is fixed.The combination of technical characteristic or technical characteristic described in the embodiment of the present invention is not construed as isolated, they can
To be mutually combined to reach superior technique effect.The scope of the preferred embodiment for the present invention can also include other reality
It is existing, and this should be understood by person of ordinary skill in the field of the embodiment of the present invention.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part for specification.Institute that is shown here and discussing
Have in example, any occurrence should be construed as merely illustrative, not as restriction.Therefore, exemplary embodiment
Other examples can have different values.
The attached drawing of the present invention is using very simplified form and using non-accurate ratio, only to convenient, apparent
Ground aids in illustrating the purpose of the embodiment of the present invention, is not to limit the enforceable qualifications of the present invention.The modification of any structure,
The change of proportionate relationship or the adjustment of size, in the case where not influencing the effect of the invention that can be generated and the purpose that can reach,
It should fall in the range of disclosed technology contents can be covered.And the identical label generation appeared in attached drawing of the present invention
The identical feature of table or component, can be applied in different embodiments.
As shown in Figure 11, a kind of device for preparing specific moisture content soil sample, preparation of soil sample device 5, water receiver including closing
9th, air compressor 8, data acquisition storage processor 6 and real-time control system 7；Wherein, preparation of soil sample device 5 sprays again including dry ground
Spill device 1, water spray controller 2, soil sample holder 3 and gravity sensor 4.
Further, the top of preparation of soil sample device 5 must cover head cover when preparing soil sample, there are one head cover so as to protect
Preparation of soil sample device 5 is held to close.
Gravity sensor 4 is connected with data acquisition storage processor 6, and to spilling soil property amount, quality of soil sample records.Data
Acquisition storage processor 6 is connected with real-time control system 7, and real-time control system 7 is connected with dry ground sprinkler 1, to ensure to be spilt
Dry ground thickness is uniform.Real-time control system 7 is connected with water spray controller 2, can guarantee that sprayed water quality is accurate, thickness is uniform.
Air compressor 8 is connected by the air bag 10 being placed in water receiver 9 with water receiver 9, water receiver 9 and water spray controller
2 are connected, and pressurization water spray is carried out to water spray controller 2 to realize.At hydraulic pressure sensor 11 and data acquisition storage in water receiver 9
It manages device 6 to be connected, data acquisition storage processor 6 is connected with real-time control system 7, real-time control system 7 and 8 phase of air compressor
Even, it is ensured that hydraulic pressure is constant in controller 2 of spraying water in whole experiment process.
The top of water spray controller 2 and water receiver 9 is equipped with gas vent 12, and water receiver bottom is equipped with row (into) water hole 13,
It can realize and water filling and draining are carried out to water spray controller 2 and water receiver 9.
A kind of application for preparing specific moisture content soil sample device, comprises the following steps：
(S11) utensil cleaning drying：It takes out dry ground sprinkler 1 and soil sample holder 3 is fully cleaned, after the completion of cleaning
Processing is dried, is then installed in preparation of soil sample device 5；
(S12) it is vented water filling：The gas vent 12 in water receiver 9 and water spray controller 2 is opened, from row's (into) of water receiver 9
Pure water is injected in water hole 13, when the gas vent 12 for opening water receiver 9 and controller 2 of spraying water has water spilling, closes all rows
Stomata 12 and row (into) water hole 13；
(S13) dry ground is placed：The quality of dry ground according to needed for being calculated the quality of soil sample Mo of required preparation and moisture content H
Mo ' inserts the dry ground of sufficient amount into dry ground sprinkler 1, and the head cover of preparation of soil sample device is covered；
(S14) hydraulic pressure Po, 1 travel speed Vt of dry ground sprinkler, moisture content H, required quality of soil sample Mo, soil sample holder
(3) setting of length L：Hydraulic pressure Po in water receiver 9 is set according to the moisture content H of soil sample, and moisture content H is higher, and hydraulic pressure Po is set
It is higher to put value；The size of the travel speed Vt combination soil particles of dry ground sprinkler 1 determines that soil particle is bigger, and travel speed Vt is set
It is smaller to put value；Required quality of soil sample Mo is determined according to the scale of follow-up test；The length L of soil sample holder 3 can pass through measurement
Soil sample holder 3 determines；Determine hydraulic pressure Po, 1 travel speed Vt of dry ground sprinkler, moisture content H and required quality of soil sample Mo,
After the length L of soil sample holder 3, this five parameters are inputted in data acquisition stores processor 6；
(S15) pressurize：Hydraulic pressure sensor 11 adopts the hydraulic pressure P real-time deliveries in water receiver 9 and water spray controller 2 to data
Then collection storage processor 6 controls the hydraulic pressure P in water spray controller 2 by real-time control system 7, ensures spray in real time
Hydraulic pressure P in water controller 2 maintains preset value Po always in the entire experiment process；
(S16) soil is spilt：The quality of soil sample holder 3 passes to data acquisition by gravity sensor 4 and stores processor 6 simultaneously
It stores；The travel speed Vt that real-time control system 7 controls dry ground sprinkler 1 to pre-set is above soil sample holder 3
One side drive towards opposite side, after driving towards opposite side, one layer of dry ground has been newly increased in soil sample holder 3；Soil sample in soil sample holder 3
Quality data acquisition passed to by gravity sensor 4 store and processor 6 and store, made the difference with the preceding quality once recorded
The as mass M t of one layer of newly-increased dry ground；
(S17) spray water：Data acquisition stores mass M t and pre-set moisture content H of the processor 6 according to newly-increased dry ground
The mass M s of spray water needed for being calculated calculates the water-jet velocity Vp of water spray controller 2 according to default hydraulic pressure Po, specifically
Calculation formula is as follows：
Water discharge rate
Wherein：γwFor the severe of water；
Then water spray controller 2 is calculated according to the stroke L of water-jet velocity Vp, water spray mass M s, controller 2 of spraying water
Travel speed Vs, and travel speed Vs is passed into real-time control system 7, the control water spray controller 2 of real-time control system 7 is with phase
The travel speed Vs answered drives towards opposite side in the one side above soil sample holder 3；After driving towards opposite side, the matter of soil sample holder 3
Amount passes to data acquisition storage processor 6 by gravity sensor 4 and stores；
(S18) experiment, which terminates, judges：(S16) (S17) step is iteratively repeated until after the completion of water spray at data acquisition storage
When quality of soil sample M in the soil sample holder 3 that reason device 6 is recorded is more than required quality of soil sample Mo, experiment can terminate；
(S19) release：When experiment terminates, real-time control system 7 can be automatically reduced in water receiver 9 and water spray controller 2
Hydraulic pressure；
(S20) draining：After the completion of release, gas vent 12 is opened successively and row (into) water hole 13 carries out complete draining；
(S21) soil sample infiltrates：Soil sample continues to be placed in soil sample holder 3, and infiltration is overnight；
(S22) sample：When follow-up test needs, the soil sample use after the completion of infiltration is taken out from soil sample holder 3.
It should be noted that：The application of the present invention is not limited to cohesive soil, and the other kinds of soil body is also possible；This hair
The open-top receptacle of various specifications can be placed in bright middle soil sample holder 3, such as hydrostatic column thus can be prepared directly
The soil sample of different size, such as cylindrical soil sample.
The present invention can prepare the soil sample of specific moisture content, and preparation soil sample is uniform, moisture content is accurate, will not be to sample preparation personnel
Health impacts, high degree of automation, can effectively solve traditional craft and mix method thoroughly and prepare the agglomerating, soil sample of soil sample caking to contain
Water rate is uneven, Water Content Tests in Soil Samples is not allowed, human factor unfavorable on health influences the problems such as bigger.
It is understood that the above description of the embodiments is intended to facilitate those skilled in the art and using this hair
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without having to go through creative labor.Therefore, the invention is not restricted to implementations here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (10)
1. a kind of device for preparing specific moisture content soil sample, it is characterised in that：Preparation of soil sample device (5), water receiver including closing
(9), data acquisition storage processor (6) and real-time control system (7)；Wherein, the preparation of soil sample device (5) of closing and including dry ground
Sprinkler (1), water spray controller (2), soil sample holder (3) and gravity sensor (4)；
The dry ground sprinkler (1) and water spray controller (2) are located at the top of soil sample rice packing device (3), to be contained respectively to soil sample
It puts and uniformly sprays single-layer soil and water in device (3) repeatedly；The gravity sensor (4) is weighing soil sample in soil sample holder (3)
Quality；
The water spray controller (2) connects with water receiver (9), and is full of water in spray water controller (2) and water receiver (9)；It is described
Hydraulic pressure sensor (11) is provided in water receiver (9), hydraulic pressure sensor (11) is connected with data acquisition storage processor (6), and
By the hydraulic pressure real-time delivery in water receiver (9) and water spray controller (2) to data acquisition storage processor (6)；
Data acquisition storage processor (6) to record the travel speed Vt of default hydraulic pressure Po, dry ground sprinkler (1),
Moisture content H, the mass M o of required soil sample, the length L of soil sample holder (3)；The data acquisition storage processor (6) and gravity
Sensor (4) connects, also to according to default moisture content H, the mass M t of each newly-increased individual layer dry ground and default hydraulic pressure
Po, the length L of soil sample holder (3) calculate the mass M s to spray water every time and water spray controller (2) in water spray process every time
In travel speed Vs；
The data acquisition storage processor (6) is also connected with real-time control system (7), and is recorded and calculated gained
Data information transfer is to real-time control system (7)；The real-time control system (7) also controls with dry ground sprinkler (1), water spray respectively
Device (2) connection processed, to control one side of the dry ground sprinkler (1) with default travel speed Vt above soil sample holder (3)
Drive towards opposite side and uniformly sprayed in soil sample holder (3) one layer of dry ground or to control water spray controller (2) to calculate
The travel speed Vs obtained drives towards opposite side from the one side above soil sample rice packing device (3) and is uniformly sprayed in soil sample holder (3)
The water of corrresponding quality Ms.
2. the device according to claim 1 for preparing specific moisture content soil sample, it is characterised in that：Further include air compressor
(8)；
It is provided with air bag (10) in the water receiver (9), air compressor (8) passes through the air bag (10) that is placed in water receiver (9)
It is connected with water receiver (9), the conversion from air pressure to hydraulic pressure is realized by air bag (10)；
Meanwhile the real-time control system (7) is also connected with air compressor (8), and pass through air compressor (8) and ensure water storage
Hydraulic pressure P in device (9) and water spray controller (2) maintains preset value Po always in the entire experiment process, and ensures water spray control
Device (2) water discharge rate Vp processed is constant.
3. the device according to claim 1 for preparing specific moisture content soil sample, it is characterised in that：The water spray controller
(2) gas vent (12) is provided at the top of.
4. the device according to claim 1 for preparing specific moisture content soil sample, it is characterised in that：The water receiver (9)
Top is provided with gas vent (12), and the bottom of the water receiver (9) is provided with row (into) water hole (13).
5. the device according to claim 1 for preparing specific moisture content soil sample, it is characterised in that：The dry ground sprinkler
(1) it is a strip funnel, the aperture of the strip funnel is more than the maximum particle diameter of soil particle.
6. the device according to claim 1 for preparing specific moisture content soil sample, it is characterised in that：The water spray controller
(2) it is one side wall cylindrical tube with holes.
7. a kind of application for the device for preparing specific moisture content soil sample as described in claim 1, which is characterized in that including as follows
Step：
(S1) water will be filled in water receiver (9) and water spray controller (2), empties air, adopted by hydraulic pressure sensor (11), data
Collection storage processor (6) and real-time control system (7) ensure the hydraulic pressure in water receiver (9) and water spray controller (2) to set in advance
Value is put, and is remained unchanged during entire experiment；
(S2) enough dry ground are put into dry ground sprinkler (1), real-time control system (7) control dry ground sprinkler (1) is with advance
One side of the constant speed of setting above soil sample holder (3) is moved to opposite side, and dry ground is spilled into soil sample holder (3),
And the mass M t for passing through newly-increased dry ground in gravity sensor (4) weighing soil sample holder (3) is transferred to data acquisition storage processing
In device (6)；
(S3) combine data acquisition storage processor (6) and record the mass M t for newly increasing dry ground, then calculated according to moisture content H
Go out the mass M s of watering needed for next time；It is calculated automatically according to the stroke L of watering mass M s, hydraulic pressure Po, water spray controller (2)
The travel speed Vs of water spray controller (2), and the travel speed Vs for controller (2) of spraying water is passed into real-time control system (7),
Real-time control system (7) control water spray controller (2) is sailed with one sides of the corresponding travel speed Vs above soil sample holder (3)
To opposite side, water is uniformly sprayed in soil sample holder (3), and passes through gravity sensor (4) and weigh in soil sample holder (3)
The mass M t+s of soil sample is transferred in data acquisition storage processor；
(S4) it is repeated according to the step of spilling soil-water spray；After the completion of watering, the quality of soil sample M in soil sample holder (3) is big
When required quality of soil sample Mo, experiment can terminate；
(S5) after experiment terminates, real-time control system (7) carries out release to water receiver (9) and water spray controller (2) automatically；Discharge
Water in water receiver (9) and water spray controller (2)；Soil sample infiltration is overnight；Sampling uses.
8. application according to claim 7, it is characterised in that：The dry ground sprinkler (1) is a strip funnel, described
Real-time control system (7) control dry ground sprinkler (1) is along perpendicular to the direction of bar shaped, with default constant speed Vt from soil sample
One side above holder (5) is spilt to opposite side, ensures that the dry ground thickness for falling into soil sample holder (3) is uniform.
9. application according to claim 7, it is characterised in that：The water spray controller (2) is one side wall cylinder with holes
Shape pipe, real-time control system (7) control water spray controller (2) is with corresponding travel speed Vs, along perpendicular to the side of pipe axial direction
To the one side above soil sample holder (5) is sprayed onto opposite side, to ensure the uniformity of spray water.
10. application according to claim 7, it is characterised in that：Default hydraulic pressure Po is according to soil sample in the water receiver (9)
Moisture content H setting, moisture content H is higher, hydraulic pressure Po set it is higher, with ensure water spray controller (2) water discharge rate Vp it is bigger.
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