CN102590476B - Vertisol expansion coefficient measurement device and application thereof - Google Patents
Vertisol expansion coefficient measurement device and application thereof Download PDFInfo
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- CN102590476B CN102590476B CN201210029867.0A CN201210029867A CN102590476B CN 102590476 B CN102590476 B CN 102590476B CN 201210029867 A CN201210029867 A CN 201210029867A CN 102590476 B CN102590476 B CN 102590476B
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- vertisol
- expansion coefficient
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- 238000005259 measurement Methods 0.000 title claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 230000008961 swelling Effects 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 19
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 17
- 238000005213 imbibition Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000010339 dilation Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- UPLPHRJJTCUQAY-WIRWPRASSA-N 2,3-thioepoxy madol Chemical compound C([C@@H]1CC2)[C@@H]3S[C@@H]3C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@](C)(O)[C@@]2(C)CC1 UPLPHRJJTCUQAY-WIRWPRASSA-N 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a vertisol expansion coefficient measurement device and application thereof. The vertisol expansion coefficient measurement device comprises a water container, an inner pipe with scales and a piston with a piston rod. A first through hole is arranged on the bottom surface of the water container, the inner pipe is erected in the water container, the piston is located in the inner pipe, a water passing gap is arranged between the piston and the inner wall of the inner pipe, a water permeable part for blocking a test sample is arranged at the top of the piston, and the piston rod penetrates through the first through hole and is matched with the inner edge of the first through hole in sealing mode. The vertisol expansion coefficient measurement device is simple to manufacture, easy to operate, high in test efficiency and capable of being used repeatedly. When the device is used for measuring vertisol expansion coefficient, the device eliminates differences of human control conditions and is good in result repeatability. The vertisol expansion coefficient measurement device can perform experimental study on influences of different environmental factors on soil expansion by changing parameters of size of soil bulk density, types and concentration of soil conditioners and water electrolytes and the like.
Description
Technical field
The present invention relates to soil mechanics and soil testing technical field, be specifically related to a kind of Vertisol expansion coefficient measurement device and application thereof.
Background technology
Vertisol is that significant soil is shunk in a kind of imbibition, dehydration, this soil worldwide distributes very extensive, there is so far more than 40 country to find that there is the existence of vertisol, due to the characteristic of this remarkable dilation of vertisol, give local building and agriculturally bring a lot of destruction, take China as example, China is one of the widest country of swelled ground distribution, has a large amount of engineering constructions to suffer the havoc of swelled ground every year.According to a preliminary estimate, the loss that China causes all kinds of engineering workses to destroy because of native swelling property every year, greatly more than several hundred million units.Given this be, a problem being badly in need of solution to the research of vertisol dilation performance.
In Soil Taxonomy and Soil Taxonomy, vertisol is an order of soil.It is the clayey soil that one is rich in 2: 1 type dilatant minerals.When this antecedent soil moisture, the soil body strongly shrinks and forms crack, and after imbibition, volume increases, and has the clayey soil of strong breathing and disturbance characteristic.Therefore, dilation characteristic is the fundamental characteristics of vertisol, and in the evaluation and classification of soil, soil swelling coefficient is important diagnostic feature and index; In engineering construction and agricultural production, soil swelling coefficient is the leading indicator of understanding soil fundamental property, as the road of swelled ground distributive province, buildings and other civil engineering project all need to measure the expansion coefficient of soil; Due to soil swelling also strong effect soil water movement and management, in the agricultural management such as soil moisture and farming, also need to measure native expansion coefficient; The expansion coefficient of soil is also the leading indicator that judges expansive soil improvement and treatment technology.
At present, geotechnique and soil physics field mainly contain saran method, rubbing method and needle tubing method to the expansile mensuration of vertisol both at home and abroad, wherein the most frequently used is latter two, in soil testing, rubbing method and needle tubing method are all first soil to be packed in cutting ring, seal with filter paper and gauze bottom, immersion saturated 24 hours, is then put on silica sand dehydration 24 hours, by the time can moulding carry out rubbing method and needle tubing method is measured again.Rubbing method is due to each firmly different shape, all differences of diameter that cause bar in the time of rubbing, and needle tubing method has extruding force to earth pillar in the time of sampling, and varying in size of each extruding force, causes condition determination to be difficult to control unanimously; Rubbing method and needle tubing method in drying course not only length can reduce, diameter also can reduce, and the mensuration of expansion coefficient is produced to considerable influence; Rubbing method and needle tubing method process and test process in all need the long time, complex operation, human factor affect larger, the poor reproducibility of measurement result.Therefore, invent a kind of soil swelling factor detection device and the method that can avoid human factor impact, favorable reproducibility, there is important theory and actual application value.
Summary of the invention
The invention provides a kind of Vertisol expansion coefficient measurement device of recycling, simple in structure, easy to operate, testing efficiency is high.
A kind of Vertisol expansion coefficient measurement device, comprise water container, with graduated inner tube and with the piston of piston rod, the bottom surface of described water container is with the first through hole, described inner tube is erected in water container, described piston in inner tube and and the inwall of inner tube between with crossing water space, described top land is provided with the permeable parts for stopping sample, and described piston rod runs through the first described through hole and is sealed and matched with the first through hole inner edge.
Described Vertisol expansion coefficient measurement device also comprises base and is fixed on the fixed bar on this base, and described inner tube is connected with described fixed bar by the first web member, and described water container passes through the second web member and is connected with described fixed bar.
Described water container is placed in described base top surface, described base is with position and described corresponding the second through hole of the first through hole, described piston rod runs through described the first through hole, the second through hole successively, the length of described piston rod is greater than the length of inner tube, so that the replacing of test sample.
As preferably, described water container and inner tube are coaxially arranged, so that intuitively observe the height of water and sample.
As preferably, described the first web member, the second web member are pipe clamp, with the inner tube that is fixedly clamped, outer tube.
As preferably, the outer wall of described water container is with scale, so that the water absorbing capacity of read test sample while expanding.
As preferably, described permeable parts are two filter paper and are positioned at the permeable stone between these two filter paper.
The present invention also provides the application of above-mentioned Vertisol expansion coefficient measurement device in soil swelling coefficient determination.
The application process of described Vertisol expansion coefficient measurement device is: the lowermost end that piston is pulled to inner tube, vertisol is packed in inner tube, make real gently, to control the soil weight in the scope requiring, write down the scale of soil surface in inner tube, then in water container, add water, the height of soil in its water level and inner tube is maintained an equal level, moisture in water container is along the gap between inner tube and base, see through filter paper and permeable stone and enter inner tube, make soil imbibition, imbibition is after 24 hours, writes down the scale of soil surface in inner tube now; Calculate the swell increment of soil according to the difference of reading before and after inner tube scale; According to formula
Calculate soil property (e
p), in formula, h is the height after soil swelling is stablized, h
0for soil original height, e
pduring directly with fractional representation, be expansion coefficient, after off-test, promote piston rod, soil is released, after expansion coefficient determinator is cleaned, preserve for use next time.
Apparatus of the present invention manufacture is simple, easy and simple to handle, and testing efficiency is high, can recycle; When apparatus of the present invention test vertisol expansion coefficient, eliminate the difference of manual control condition, result favorable reproducibility; Determinator of the present invention can, by changing the parameter such as kind of electrolytes and concentration of soil weight size, soil conditioner, water, carry out the experimental study of varying environment factor on soil swelling impact.
Accompanying drawing explanation
Fig. 1 is the structural representation of Vertisol expansion coefficient measurement device of the present invention.
Embodiment
As shown in Figure 1, a kind of Vertisol expansion coefficient measurement device, comprise water container 1, be with graduated inner tube 2, with the piston 4 of piston rod 3, base 5 and be fixed on the fixed bar 6 on this base 5, water container 1 and inner tube 2 are coaxially arranged, the bottom surface of water container 1 is with the first through hole, water container 1 is connected with fixed bar 6 by the second web member 7, water container 1 is placed in base 5 end faces, base 5 is with position and described corresponding the second through hole of the first through hole, inner tube 2 is erected in water container 1, inner tube 2 is connected with fixed bar 6 by the first web member 8, the second web member 7, the first web member 8 is pipe clamp, piston 4 in inner tube 2 and and the inwall of inner tube 2 between with crossing water space, piston 4 tops are provided with two filter paper 9 and are positioned at the permeable stone 10 between these two filter paper, piston rod 4 runs through the first through hole successively, the second through hole, and with the first through hole, the second through hole inner edge is sealed and matched, the length of piston rod 4 is greater than the length of inner tube 2.
Adopt said apparatus testing soil expansion coefficient, 4 test pedotheques are taken from the typical swelled ground that is distributed in Xinyi, belong to vertisol in classification.Piston 4 is pulled to the lowermost end of inner tube 2, vertisol is packed in inner tube 2, make real gently, the control soil weight is 1.3～1.4g/cm
3write down the scale of soil surface in inner tube 2, then in water container 1, add water, the height of soil in its water level and inner tube 2 is maintained an equal level, moisture in water container 1 enters inner tube 2 along the gap between inner tube 2 tube walls and base 1, sees through filter paper 9 and enters inner tube 2 with permeable stone 10, makes soil imbibition, after imbibition 24 hours, write down the now scale millimeter of inner tube 2 interior soil surfaces; According to the difference of reading before and after test, according to formula
Calculate the expansion coefficient of soil sample to be measured, in formula, h is the height after soil swelling is stablized, h
0for soil original height, result is as follows: the expansion coefficient of test pedotheque 1 is 13.43%, and the expansion coefficient of test pedotheque 2 is 13.13%, the expansion coefficient of test pedotheque 3 is 12.73%, the expansion coefficient of test pedotheque 4 is 12.43%.After off-test, promote piston rod 3, soil is released, after expansion coefficient determinator is cleaned, preserve for next time.
Claims (9)
1. a Vertisol expansion coefficient measurement device, it is characterized in that, comprise water container (1), with graduated inner tube (2) and with the piston (4) of piston rod (3), the bottom surface of described water container (1) is with the first through hole, described inner tube (2) is erected in water container (1), described piston (4) be arranged in inner tube (2) and and the inwall of inner tube (2) between with crossing water space, described piston (4) top is provided with the permeable parts for stopping sample, described piston rod (3) runs through the first described through hole, and be sealed and matched with the first through hole inner edge.
2. Vertisol expansion coefficient measurement device as claimed in claim 1, it is characterized in that, also comprise base (5) and be fixed on the fixed bar (6) on this base (5), described inner tube (2) is connected with described fixed bar (6) by the first web member (8), and described water container (1) is connected with described fixed bar (6) by the second web member (7).
3. Vertisol expansion coefficient measurement device as claimed in claim 1 or 2, it is characterized in that, described water container (1) is placed in described base (5) end face, described base (5) is with position and described corresponding the second through hole of the first through hole, and described piston rod (3) runs through described the first through hole, the second through hole successively.
4. Vertisol expansion coefficient measurement device as claimed in claim 1, is characterized in that, the length of described piston rod (3) is greater than the length of inner tube (2).
5. Vertisol expansion coefficient measurement device as claimed in claim 1, is characterized in that, described water container (1) and inner tube (2) are coaxially arranged.
6. Vertisol expansion coefficient measurement device as claimed in claim 2, is characterized in that, described the first web member (8), the second web member (7) are pipe clamp.
7. Vertisol expansion coefficient measurement device as claimed in claim 1, is characterized in that, the outer wall of described water container (1) is with scale.
8. Vertisol expansion coefficient measurement device as claimed in claim 1, is characterized in that, described permeable parts are two filter paper (9) and are positioned at the permeable stone (10) between these two filter paper (9).
9. the application of the Vertisol expansion coefficient measurement device as described in claim as arbitrary in claim 1～8 in soil swelling coefficient determination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210029867.0A CN102590476B (en) | 2012-02-10 | 2012-02-10 | Vertisol expansion coefficient measurement device and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210029867.0A CN102590476B (en) | 2012-02-10 | 2012-02-10 | Vertisol expansion coefficient measurement device and application thereof |
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| CN102590476A CN102590476A (en) | 2012-07-18 |
| CN102590476B true CN102590476B (en) | 2014-06-25 |
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| CN104749343B (en) * | 2015-03-17 | 2016-05-25 | 中山大学 | A kind of axle of constant volume controllable temperature is soil expansion force tester radially |
| CN109060657B (en) * | 2016-12-17 | 2020-12-22 | 苏州开普岩土工程有限公司 | Exploration engineering soil expansion rate measuring method |
| CN106526136A (en) * | 2017-01-04 | 2017-03-22 | 山东省水利科学研究院 | Liquid handling apparatus |
| CN106908581B (en) * | 2017-01-25 | 2019-06-14 | 浙江工业大学 | A kind of simple portable Soil Water Content Rate Determination instrument of belt sensor |
| CN108444902A (en) * | 2018-02-09 | 2018-08-24 | 安徽省金田建筑设计咨询有限责任公司 | Measure the experimental rig of the free Salt heaving rate of sulfate-salinized soil |
| CN110501375A (en) * | 2019-09-26 | 2019-11-26 | 郑州大学 | The experimental rig and test method of high polymer free wxpansion cubing |
| CN113600104A (en) * | 2021-07-28 | 2021-11-05 | 海南富山油气化工有限公司 | Aromatization device suitable for diversified raw materials |
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| JPS63186148A (en) * | 1987-01-28 | 1988-08-01 | Daido Steel Co Ltd | Testing method for expansion coefficient of slag |
| CN2842422Y (en) * | 2005-10-10 | 2006-11-29 | 长安大学 | Load and water environment coupling device |
| CN201331482Y (en) * | 2009-01-21 | 2009-10-21 | 河南省第一建筑工程集团有限责任公司 | Device for determining permeation coefficient of permeable concrete |
| CN101936705A (en) * | 2010-06-17 | 2011-01-05 | 北京探矿工程研究所 | High-temperature high-pressure dynamic mud shale expansion amount tester |
| CN102230931A (en) * | 2011-06-15 | 2011-11-02 | 中国地质大学（武汉） | Dilatometer |
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2012
- 2012-02-10 CN CN201210029867.0A patent/CN102590476B/en not_active Expired - Fee Related
Patent Citations (5)
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|---|---|---|---|---|
| JPS63186148A (en) * | 1987-01-28 | 1988-08-01 | Daido Steel Co Ltd | Testing method for expansion coefficient of slag |
| CN2842422Y (en) * | 2005-10-10 | 2006-11-29 | 长安大学 | Load and water environment coupling device |
| CN201331482Y (en) * | 2009-01-21 | 2009-10-21 | 河南省第一建筑工程集团有限责任公司 | Device for determining permeation coefficient of permeable concrete |
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