CN108680409A - Sample preparation device applied to fine grained soil to control compaction degree - Google Patents
Sample preparation device applied to fine grained soil to control compaction degree Download PDFInfo
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- CN108680409A CN108680409A CN201810459104.7A CN201810459104A CN108680409A CN 108680409 A CN108680409 A CN 108680409A CN 201810459104 A CN201810459104 A CN 201810459104A CN 108680409 A CN108680409 A CN 108680409A
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- 239000002689 soil Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 37
- 238000005056 compaction Methods 0.000 title claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000013307 optical fiber Substances 0.000 claims description 21
- 239000004809 Teflon Substances 0.000 claims description 4
- 229920006362 Teflon® Polymers 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000686 essence Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000007634 remodeling Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005527 soil sampling Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- 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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a sample preparation device applied to fine grained soil to control compaction degree, which comprises a rigid frame, a stirring system, a compaction system, a steam generation system and a measurement system, wherein a compaction barrel is arranged on the rigid frame, and a steam guide pipe connected with the steam generation system is arranged below the compaction barrel; quantitative control is realized by accurately controlling the downward displacement of the compaction rod and combining accurate observation of an acrylic scale on the side wall of the compaction barrel; in the compaction process, the water content of the sample does not need to be transferred to other containers again after being prepared, so that water evaporation caused by soil sample transfer can be avoided, and the test precision is effectively improved; the scheme can also be applied to soil compaction tests, the optimal moisture content and the maximum dry density of the soil sample are determined by drawing compaction curves, the integration and the multiple purposes are realized, the trouble that a compaction tester needs to be used for tests is eliminated, and the practical value and the popularization value are high.
Description
Technical field
The present invention relates to soil test technique fields, and in particular to a kind of system accurately controlling compactness applied to fine grained soil
Sampling device, be laboratory test in, remodeling fine grained soil make different compactnesss, different water cut sample provide have more convenience and
The tool of precision, while the use of compaction test instrument can be made.
Background technology
In geotechnical engineering practice, it is often necessary to study physical mechanics of the various remoldability fine grained soils under different compactnesss
Property provides guidance for engineering practice.Soil sample compacting is all work to be done of the soil test first step, at this stage indoor geotechnique
It tests and relies primarily on manual experience when making the sample of different compactnesss, moisture content, be mostly qualitatively to control, shortage convenience,
Quantitative control, sample preparation device with strong points；Compactness is all controlled by moisture content, and now mostly is using first will be native
It after sample is mixed thoroughly outside, then puts into sample preparation device container and is compacted, during which there may be the influences such as moisture evaporation experiment essences
Degree, is unfavorable for practical application, causes compactness inside the sample made uneven, moisture content is inaccurate, the compacting of sample preparation finished product
There are larger gaps with design value for degree.In view of using pure manual sample preparation, either operation etc. is brought existing sample preparation device by rule of thumb
Inconvenience and low precision factor, design it is a kind of applied to fine grained soil control compactness sample preparation device be particularly important.
Invention content
The present invention proposes a kind of sample preparation device applied to fine grained soil control compactness, is made for laboratory soil test different
Moisture content, remolded cohesive soil offer one kind of different compactnesss is easily operated, controls accurately sample preparation tool.
The present invention is realized using technical solution below：A kind of sample preparation dress applied to fine grained soil control compactness
It sets, including rigid frame, stirring system, debulking systems, steam generating system and measuring system, is arranged on the rigid frame
There is compacting bucket, is compacted be provided with the steam lead being connected with steam generating system below bucket；
The debulking systems include driving device, compaction rod and the piston being connected with compaction rod, and compaction rod is filled with driving
Set connected, piston is arranged in compacting bucket and match with the internal diameter of compacting bucket, and driving device control compaction rod stretches up and down
It is mobile to be moved up and down in compacting bucket with piston in turn, soil sample is densified to required volume；The stirring system includes stirring
Bar and agitating plate in stirring boom end is set, the first through hole with the agitating plate form fit is provided on piston, is stirred
It mixes bar with driving device to be connected, rotates and realize stirring rod moving up and down along first through hole by driving device control stirring rod,
Stirring rod shifts up the bottom surface of the bottom surface and piston that make agitating plate under the action of driving device and closely pastes after the completion of stirring
It closes and in same level；
The steam generating system includes water tank, ultrasonic wave steam generator and turbine steam pressurizer, the water tank
Be connected with ultrasonic wave steam generator, ultrasonic wave steam generator is connected with turbine steam pressurizer, turbine steam pressurizer with
Steam lead is connected, and the high steam of generation is injected by the thin steam lead of length in soil sample, realizes the uniform humidification to soil sample；Institute
It includes optical fiber, optical fibre interrogation instrument and moisture content device for digit-displaying to state measuring system, the optical fiber along compacting bucket inner wall setting, optical fiber with
Optical fibre interrogation instrument is connected, and to detect the indexs such as soil sample temperature and moisture content, in injection steam, can monitor soil sample in real time
Moisture content.
Further, the compacting bucket includes a drum and the sample preparation bucket being arranged below drum, is compacted the side wall of bucket
On be vertically arranged with a bar shape trench hole, acrylic graduated scale is provided in bar shape trench hole, in order to observe soil sample in bucket in real time
Compacting height, so that it is guaranteed that the accuracy of sample compactness.
Further, the sample preparation bucket includes two semicircular petal, and cutting ring, the side wall of two semicircular petal are provided in sample preparation bucket
On be provided with fixing lock to realize the free switch of sample preparation bucket, facilitate by the soil sample made take out.
Further, Teflon long paint is coated on the inner surface and compacting bucket inner wall that the cutting ring is contacted with soil sample
Layer, to facilitate form removal.
Further, it is additionally provided with horizontal baffle on the compaction rod, is provided on the horizontal baffle and stirring rod
The second through-hole matched, stirring rod passes through second through-hole, to limit stirring rod, achievees the effect that stablize stirring.
Further, the cross-sectional shape of the agitating plate is cross, ensures the more uniform of stirring.
Further, it is arranged fluted on the compacting bucket inner wall, the fiber deployment is in the groove, effectively to protect
Optical fiber is protected, prevents from causing damage to optical fiber when soil shear failure and compacting, influence to monitor.
Further, the steam lead is laid in sample bottom high density, and the internal diameter of steam lead is 0.3mm-1mm,
And filter paper is provided with above steam lead, prevent soil particle from blocking under the premise of increasing vapor with sample contacts area
Steam lead.
Compared with prior art, the advantages and positive effects of the present invention are：
(1) compactness sample preparation device proposed by the present invention as a vapor humidifies soil sample, and passes through optical fiber reality
Now the implementation of Water Content Tests in Soil Samples is monitored, the soil sample of specific moisture content can accurately be configured；By be accurately controlled compaction rod to
Under displacement, and the acrylic scale on compacting barrel side wall is combined accurately to observe, realizes quantitative control, for example to control it dry
Soil sample is pressed onto some position (its corresponding soil sample dry density) and just stopped by density, and measuring accuracy is high；
(2) compactness is all controlled by controlling moisture content, and this programme is directly being compacted by way of vapor
It is stirred in bucket, vapor and soil sample are uniformly mixed, humidify uniformly；In compacting process, while moisture content can be prepared, be kept away
Exempt from other samples to stir humidification outside, carry out in container being compacted caused moisture evaporation, further increases precision；
(3) existing compactor is only compacted, and after compacting is over, to be generally placed on compaction tester, according to hitting
Solid-line curve obtains maximum dry density and optimum moisture content relationship；But the sample preparation device that this programme is proposed is in addition to accurate sample preparation,
Compacting can directly carry out compaction test, draw tamping curve after being over, determine the optimum moisture content and maximum dry density of soil sample,
It realizes that one is multi-purpose, eliminates and additionally need the trouble that compaction tester is done experiment.
Description of the drawings
Fig. 1 is the overall structure diagram of sample preparation device described in the embodiment of the present invention；
Fig. 2 is the attachment structure schematic diagram of debulking systems and stirring system in Fig. 1；
Fig. 3 is the structural schematic diagram that bucket is compacted in Fig. 1.
Specific implementation mode
In order to which the above objects, features and advantages of the present invention is more clearly understood, below in conjunction with the accompanying drawings and implement
The present invention will be further described for example.It should be noted that in the absence of conflict, in embodiments herein and embodiment
Feature can be combined with each other.Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still,
The present invention can also be implemented using different from other modes described here, and therefore, the present invention is not limited to following public
Specific embodiment.
As shown in Figure 1, a kind of sample preparation device applied to fine grained soil control compactness, including rigid frame 6, stirring system
System, debulking systems, steam generating system and measuring system are provided with compacting bucket 13 on the rigid frame 6, compacting bucket 13
Lower section is provided with the steam lead 14 being connected with steam generating system；The debulking systems include driving device 1, compaction rod 4 with
And the piston 7 being connected with compaction rod 4, compaction rod 4 are connected with driving device 1, hydraulic device, electricity may be used in the driving device
The structures such as machine are designed, be existing apparatus, be not set forth in detail herein, piston 7 setting compacting bucket 13 in and with compacting bucket
13 internal diameter matching, the driving device 1 control about 4 telescopic moving of compaction rod and then with piston 7 on compacting bucket 13 is interior
Soil sample is densified to required volume by lower movement；
The stirring system includes stirring rod 3 and agitating plate 10 in 3 end of stirring rod is arranged, as shown in Fig. 2, piston
It is provided with the first through hole with 10 form fit of the agitating plate on 7, in the present embodiment, the cross section of the agitating plate 10 is ten
Font ensures the more uniform of stirring, and stirring rod 3 is connected with driving device, is rotated and is realized by driving device control stirring rod
Stirring rod is moved up and down along first through hole, and stirring rod shifts up under the action of driving device after the completion of stirring makes stirring
The bottom surface of plate 10 fits closely with the bottom surface of piston 7 and in same level, in order to realize accurate positioning, the compaction rod
It is fixedly installed horizontal baffle 5 on 4, stop block 21 is provided on the stirring rod 3, when bottom surface fits closely, on stirring rod 3
Stop block 21 lived just by 5 backstop of baffle, when compaction rod is to bottom offset, agitating plate 10 and piston 7 together compacted samples, and
And it is provided on the horizontal baffle 5 and passes through second through-hole with 3 matched second through-hole of stirring rod, stirring rod 3, stirring
Stirring rod 3 can be limited when mixing, achieve the effect that stablize stirring.
In addition, continuing to refer to figure 1, the steam generating system includes water tank 18, ultrasonic wave steam generator 19 and whirlpool
Take turns steam pressurizer 17, in the present embodiment, steam generating system includes that water tank, ultrasonic wave steam generator and turbine steam add
Depressor is all made of existing equipment on sale, and the water tank 18 is connected with ultrasonic wave steam generator 19, ultrasonic wave steam generator 19
It is connected with turbine steam pressurizer 17, turbine steam pressurizer 17 is connected with steam lead 14, and the high steam of generation passes through length
In soil sample in the thin injection of steam lead 14 compacting bucket, the uniform humidification to soil sample is realized；The measuring system include optical fiber 9,
Optical fibre interrogation instrument 16 and moisture content device for digit-displaying 8, the optical fiber 9 are compacted be provided on bucket inner wall along compacting 13 inner wall of bucket setting
With the matched groove of optical fiber, the fiber deployment is in the groove, with effective protection optical fiber, when preventing soil shear failure and compacting
Damage is caused on optical fiber, influences monitoring, optical fiber 9 is connected with optical fibre interrogation instrument 16, to detect the fingers such as soil sample temperature and moisture content
Mark, in injection steam, can monitor the moisture content of soil sample, and shown by moisture content device for digit-displaying in real time.
As shown in figure 3, the compacting bucket 13 includes a drum 131 and the sample preparation bucket 132 being arranged below drum 131,
It is compacted be vertically arranged with a bar shape trench hole 20 on the side wall of bucket 13, acrylic graduated scale is provided in bar shape trench hole 20, in order to
The compacting height of soil sample in bucket is observed in real time, so that it is guaranteed that the accuracy of sample compactness, the sample preparation bucket 132 includes two semicircular
Petal is provided with cutting ring in sample preparation bucket 132, fixing lock 12 is provided on the side wall of two semicircular petal to realize sample preparation bucket 132
Free switch facilitates and takes out the soil sample made.
In addition, for convenience of form removal, Teflon is coated on the inner surface and compacting bucket inner wall that the cutting ring is contacted with soil sample
Long paint layer, and steam lead is laid in sample bottom in high density, and the internal diameter of steam lead is 0.3mm-1mm, preferably
0.5mm, and filter paper is provided with above steam lead, soil is prevented under the premise of increasing vapor with sample contacts area
Grain blocks steam lead.
With reference to specific processing procedure, the operating process of sample preparation device of the present invention is described in detail：
(1) it is first pre-processed, measures cutting ring height h0, the gross weight m of cutting ring and teflon coatings0, cutting ring bottom surface radius
r0, and calculate compacting bottom of the barrel area (cutting ring floor space) s0；
(2) open every sensor, inspection apparatus leakproofness after, two semicircular petal is fastened be placed on drum just under
Side makes its both sides scale coincide with compacting bucket both sides scale, and opening ultrasonic wave steam generator makes it first preheat 5min-10min,
It is M to be poured into compacting bucket and weighed up quality1Soil sample, record moisture content ρ at this time1；
(3) position of adjustment stirring rod makes in cross agitating plate whole injection soil sample, and turns on the switch and make its rotation, opens
Turbine steam pressurizer makes the steam of generation in larger pressure injection soil sample；
(4) variation for monitoring its moisture content in real time by moisture content device for digit-displaying, when the numerical value of display reaches ρ2When, it closes super
It is ρ that moisture content, which can be obtained, in sound wave steam generator, turbine steam pressurizer and cross agitating plate2Soil sample；
So that cross agitating plate is increased along the first through hole of piston by controller, is stirred when its bottom coincide with piston base
Bar is mixed just to be blocked by baffle.
(5) driving device is opened, if the displacement that good compaction rod is downward, while the acrylic scale plate by being compacted bucket both sides
Observation soil sample is compacted situation in real time；After stiff piston is displaced to the position H calculated in advance, driving device is shut down, is stood
Two semicircular petal is opened after 1min-2min, and takes out cutting ring, is scabbled the part of soil sample surface irregularity using native knife is cut,
Weigh gained soil sample and cutting ring gross weight m1。
Handle data：If the density after soil sample compacting is υ, then there is the volume V of soil sample after compacting1=H*s0, qualityTherefore have
M1Soil sample initial mass；M2Moisture content reaches ρ2When quality of soil sample；ρ1Soil sample initial aqueous rate；ρ2Soil sample target
Moisture content；Height after the compacting of H- soil samples；s0It is compacted bucket, cutting ring cross-sectional area.
Accuracy detection：(m1-m0)=η (ν * s0*h0)
h0Soil sample elemental height；m0Cutting ring quality；m1Soil sample and cutting ring quality.
If according to experiment statistics as a result, | 1- η |≤3%, illustrate that the precision of soil sample reaches standard.
In compaction test, sample moisture content is ρa, hit the height H of sample after realitya, sample matter dry density is：
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
It imitates embodiment and is applied to other fields, but it is every without departing from technical solution of the present invention content, according to the technical essence of the invention
To any simple modification, equivalent variations and remodeling made by above example, the protection domain of technical solution of the present invention is still fallen within.
Claims (8)
1. it is a kind of applied to fine grained soil control compactness sample preparation device, which is characterized in that including rigid frame, stirring system,
Debulking systems, steam generating system and measuring system are provided with compacting bucket on the rigid frame, are compacted the lower section setting of bucket
There is the steam lead being connected with steam generating system；
The debulking systems include driving device, compaction rod and the piston being connected with compaction rod, compaction rod and driving device phase
Even, piston is arranged in compacting bucket and is matched with the internal diameter of compacting bucket, the driving device control compaction rod telescopic moving up and down
And then moved up and down in compacting bucket with piston, with compacted samples；The stirring system includes that stirring rod and setting are being stirred
The agitating plate of boom end is mixed, the first through hole with the agitating plate form fit, stirring rod and driving device are provided on piston
It is connected, rotated by driving device control stirring rod and realizes stirring rod moving up and down along first through hole；
The steam generating system includes water tank, ultrasonic wave steam generator and turbine steam pressurizer, the water tank with it is super
Sound wave steam generator is connected, and ultrasonic wave steam generator is connected with turbine steam pressurizer, turbine steam pressurizer and steam
Conduit is connected, and realizes the steam humidification to soil sample；The measuring system includes optical fiber, optical fibre interrogation instrument and moisture content digital display
Device, the optical fiber are connected with optical fibre interrogation instrument, refer to detect soil sample temperature and moisture content along compacting bucket inner wall setting, optical fiber
Mark, and shown by moisture content device for digit-displaying.
2. the sample preparation device according to claim 1 applied to fine grained soil control compactness, it is characterised in that：The compacting
Bucket includes a drum and the sample preparation bucket being arranged below drum, is compacted be vertically arranged with a bar shape trench hole, item on the side wall of bucket
Acrylic graduated scale is provided in shape slot.
3. the sample preparation device according to claim 2 applied to fine grained soil control compactness, it is characterised in that：The sample preparation
Bucket includes two semicircular petal, is provided with cutting ring in sample preparation bucket, fixing lock is provided on the side wall of two semicircular petal.
4. the sample preparation device according to claim 1 or 3 applied to fine grained soil control compactness, it is characterised in that：It is described
It is additionally provided with horizontal baffle on compaction rod, is provided on the horizontal baffle and is worn with matched second through-hole of stirring rod, stirring rod
Cross second through-hole.
5. the sample preparation device according to claim 4 applied to fine grained soil control compactness, it is characterised in that：The stirring
The cross-sectional shape of plate is cross.
6. the sample preparation device according to claim 5 applied to fine grained soil control compactness, it is characterised in that：The cutting ring
It is coated with Teflon dope layer on the inner surface and compacting bucket inner wall contacted with soil sample.
7. the sample preparation device according to claim 6 applied to fine grained soil control compactness, it is characterised in that：The compacting
It is arranged fluted on bucket inner wall, the fiber deployment is in the groove.
8. the sample preparation device according to claim 7 applied to fine grained soil control compactness, it is characterised in that：The steam
Catheter diameter is 0.3mm-1mm, and filter paper is provided with above steam lead.
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| CN201810459104.7A CN108680409B (en) | 2018-05-15 | 2018-05-15 | Sample preparation device applied to fine grained soil to control compaction degree |
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| CN201810459104.7A CN108680409B (en) | 2018-05-15 | 2018-05-15 | Sample preparation device applied to fine grained soil to control compaction degree |
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| CN108680409B CN108680409B (en) | 2020-09-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297782A (en) * | 2018-10-31 | 2019-02-01 | 刘海松 | A kind of soil sample humidification dehumidifying device |
| CN113008641A (en) * | 2021-02-26 | 2021-06-22 | 洛阳理工学院 | Combined multi-connection sample preparation instrument and sample preparation method for remolded soil cutting ring sample |
| CN113941266A (en) * | 2020-12-22 | 2022-01-18 | 中山大学 | Small-size integrated device of appointed moisture content of preparation and soil additive content soil sample |
| CN114323830A (en) * | 2021-11-18 | 2022-04-12 | 北京卫星制造厂有限公司 | Soil preparation device and method |
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