CN105547787B - Remold saturated soil water chemistry leaching test device and its method - Google Patents
Remold saturated soil water chemistry leaching test device and its method Download PDFInfo
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- CN105547787B CN105547787B CN201610078904.5A CN201610078904A CN105547787B CN 105547787 B CN105547787 B CN 105547787B CN 201610078904 A CN201610078904 A CN 201610078904A CN 105547787 B CN105547787 B CN 105547787B
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- sample
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- leaching
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- 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
Abstract
The invention discloses a kind of remodeling saturated soil water chemistry leaching test device and its methods, are related to civil engineering soil test field.The present apparatus is：Upper sample（01）With lower sample（02）It is positioned over leaching instrument（30）In；Liquid-collecting bottle（20）With leaching instrument（30）It is individually positioned in head stent（10）Upper and lower level on；Liquid-collecting bottle（20）With leaching instrument（30）Between pass through rubber catheter（40）Connection；Head stent（10）To liquid-collecting bottle（20）Different initial water pressure differences is provided.This method is：1. sample preparation；2. fill sample；3. leaching instrument is installed；4. leaching；5. sentence steady.The present invention can adjust head height according to the type of leaching soil sample, avoid erosion or disturbance of the leachate to soil sample；Pore content replacement can be not only quickly finished, shortens the sample preparation time, and pore solution concentration can be precisely controlled；Simple structure, it is easy to operate, in a leaching instrument can simultaneously two parallel samples of leaching, have preferable economic and practical.
Description
Technical field
The present invention relates to civil engineering soil test field more particularly to a kind of remodeling saturated soil water chemistry pour to strain to test dresses
It puts and its method.
Specifically, the present apparatus is a kind of sample preparation dress influenced for studying water soil chemical field to soil sample mechanical characteristic
It puts, especially suitable for having many advantages, such as that sample preparation is uniform, initial structure is weak and water chemistry effect is apparent, but infiltration coefficient is small, single
Change pore solution ingredient by diffusion and take longer mud sample preparation method（Ensure initial configuration consistency, distilled water is with doing
Soil mixing.
Background technology
At present, as engineering-built and the environmental problem during use become increasingly conspicuous, more and more scholars start
Geotechnical engineering problems caused by the various environmental problems of hand.Wherein, the soil body starts by the change of mechanical property after chemical erosion
It is taken seriously, but how to prepare and can effectively simulate the soil body and become a critical issue by the experiment soil sample after chemical erosion.Though
Right undisturbed soil sample can more accurately reflect the prototype structure of the soil body, but limitation by sampling technique and environment are influenced, and are tested
As a result unsatisfactory, discreteness is larger.Produce the experiment soil sample after chemical erosion on the contrary, indoor, not only property it is relatively uniform and
Result of the test discreteness is smaller；And the condition of sample is controllable, convenient for specific experimental study.But due to the soil body and chemical solution
Reaction process it is very slow, few then several weeks, at most several months, especially infiltration coefficient are small（Sample made from mud sample preparation method）'s
Soil sample, sample preparation period are even longer.Therefore, it is necessary to develop a quick preparation by the device of chemical erosion sample.
Invention content
In view of shortcoming and defect existing for above-mentioned technology, the present invention is intended to provide a kind of remodeling saturated soil water chemistry leaching examination
Experiment device and its method, the soil test grown especially suitable for chemical environment complexity and sample preparation period.
In order to achieve the above object, the technical scheme is that：
This experimental rig is included by leaching object --- upper sample and lower sample；
It is provided with head stent, liquid-collecting bottle, leaching instrument and rubber catheter；
Upper sample and lower sample are positioned in leaching instrument；
Liquid-collecting bottle and leaching instrument are individually positioned in the upper and lower level of head stent；
It is connected between liquid-collecting bottle and leaching instrument by rubber catheter；
Head stent provides different initial water pressure differences to liquid-collecting bottle.
Compared with prior art, the present invention it the advantage is that：
1. head stent is equipped with moveable bearing plate, can head height be adjusted according to the type of leaching soil sample, avoided
Erosion or disturbance of the filtrate to soil sample；
2. usually there are three types of modes for the existing saturated soil sample for preparing different aperture Hydrochemical Composition：Mixing method, infusion method
With leaching method；Although mixing method can reach chemical balance quickly, cannot very well simulation natural rock-filled by chemical erosion
Change in mechanics afterwards；Infusion method relies primarily on diffusion and changes soil body hole Hydrochemical Composition, but its process is very
Slowly, few then several weeks, at most several months, especially infiltration coefficient are small（Sample made from mud sample preparation method）Soil sample, the sample preparation period
It is even longer；In comparison, leaching method compensates for the deficiency of above two method, achieves comparatively ideal result；
3. the laboratory test soil sample by chemical erosion is prepared, it, should in the past mostly using the method directly impregnated afterwards is vacuumized
Whether method not only needs the long time, but also it is difficult to judge the chemical concentrations invaded in soil sample solution and reach flat
Weighing apparatus；Using leaching instrument by the pore solution in pressure displacement soil sample, required chemical concentrations, Er Qieke can be rapidly reached
With by measuring the concentration of filter liquor to determine whether completing to replace；
4. present apparatus simple structure, easy to operate；And in a leaching instrument can simultaneously two parallel samples of leaching, relatively
For existing technology, cost is effectively reduced, there is preferable economic and practical.
Description of the drawings
Fig. 1 is the structure diagram of the present apparatus（It is three-dimensional）；
Fig. 2 is the structure diagram of leaching instrument（Section view）；
Fig. 3 is the structure diagram of leaching instrument（It is three-dimensional）；
Fig. 4 is the structure diagram of cover board（It is three-dimensional）；
Fig. 5 is the structure diagram of test specimen tube（It is three-dimensional）；
Fig. 6 is the structure diagram that securing bracket is connected with pedestal（It is three-dimensional）.
In figure：
01-upper sample, 02-lower sample；
10-head stent,
11-top plate, 12-side plate, 13-bottom plate, 14-bearing plate, 15-groove；
20-liquid-collecting bottle；
30-leaching instrument,
31-cover board,
311-cover board fluid hole, 312-hemispherical groove, 313-cover board ring-shaped step；
32-test specimen tube,
321-inlet opening, 322-gas vent, ring-shaped step on 323-test specimen tube,
Ring-shaped step under 324-test specimen tube；
33-securing bracket,
331-screw rod, 332-crossbeam, 333-setting strut；
34-pedestal,
341-pedestal fluid hole, 342-pedestal ring-shaped step, 343-annular groove,
344-threaded hole.
35-upper dankness stone,
36-middle permeable stone,
37-lower permeable stone,
381-upper O-ring, 382-lower O-ring,
39-pagoda mouth；
40-rubber catheter.
Specific embodiment
With reference to the accompanying drawings and examples to the detailed description of the invention：
First, experimental rig
1st, it is overall
Such as Fig. 1, the present apparatus is included by leaching object --- upper sample 01 and lower sample 02；
It is provided with head stent 10, liquid-collecting bottle 20, leaching instrument 30 and rubber catheter 40；
Upper sample 01 and lower sample 02 are positioned in leaching instrument 30；
Liquid-collecting bottle 20 and leaching instrument 30 are individually positioned in the upper and lower level of head stent 10；
It is connected between liquid-collecting bottle 20 and leaching instrument 30 by rubber catheter 40；
Head stent 10 provides different initial water pressure differences to liquid-collecting bottle 20.
2nd, functional component
0）Upper sample 01 and lower sample 02
Upper sample 01 and lower sample 02 are by leaching object, are cutting ring sample（Undisturbed is compacted sample, hits real sample or mud
Sample）.
1）Head stent 10
Such as Fig. 1, head stent 10 includes top plate 11, side plate 12, bottom plate 13, bearing plate 14 and groove 15；
Top plate 11, bottom plate 13 and two blocks of left and right side plate 12 form a bite character form structure, are provided on left side plate 12 more
Layer groove 15, in left and right, groove 15 is embedded in multilayer bearing plate 14；
Leaching instrument 30 is placed on base 13, and liquid-collecting bottle 20 is placed on bearing plate 14.
Multi-layer groove 15 for changing bearing plate 14 height, and then change head height.
2）Liquid-collecting bottle 20
Such as Fig. 1, liquid-collecting bottle 20 is a kind of container for containing leachate, and bottom is provided with outlet；
The leachate of certain altitude is provided by rubber catheter 40 for leaching instrument 30.
3）Leaching instrument 30
Such as Fig. 2,3, leaching instrument 30 include cover board 31, test specimen tube 32, securing bracket 33, pedestal 34, upper dankness stone 35, in thoroughly
Water stone 36, lower permeable stone 37, upper O-ring 381, lower O-ring 382 and pagoda mouth 39；
Its position and connection relation are：
From top to bottom, cover board 31, test specimen tube 32 and pedestal 34 are sequentially connected one pressurization of composition by securing bracket 33
Full-closed structure, between and sealed by upper O-ring 381 and lower O-ring 382, prevent leachate from being overflowed from test specimen tube 32；
In test specimen tube 32, from top to bottom, screw rod 331, cover board 31, upper dankness stone 35, upper O-ring 381, upper sample
01st, middle permeable stone 36, lower sample 02, lower O-ring 382, lower permeable stone 37 and pedestal 34 are sequentially connected；
Pagoda mouth 39 is for cover board fluid hole 311, pedestal fluid hole 341, test specimen tube inlet opening 321, test specimen tube gas vent
322, it is connected through a screw thread.
（1）Cover board 31
Such as Fig. 2,4, cover board 31 is a kind of metal round block, its side is provided with cover board fluid hole 311, in the above center
Hemispherical groove 312 is provided with, is provided with cover board ring-shaped step 313 in its lower section；
331 lower end of screw rod with rotation hand wheel is inserted into hemispherical groove 312；
（2）Test specimen tube 32
Such as Fig. 2,5, test specimen tube 32 is a kind of metal cylinder, its side wall is provided with inlet opening 321, exhaust outlet 322 and its examination
Ring-shaped step 323, lower ring-shaped step 324 on sample cylinder；Upper O-ring 381 is placed on ring-shaped step 323；Lower O-ring 382 is pacified
It is placed on lower ring-shaped step 324；
（3）Securing bracket 33
As Fig. 2,6, securing bracket 33 include two setting struts 333, centres with the crossbeam 332 through screw thread and carry
The screw rod 331 of rotation hand wheel；
It erects 333 upper end of strut to be connected through a screw thread with crossbeam 332, erects 333 lower end of strut and screw on pedestal 34
Threaded hole 344 in, by handwheel rotate screw rod 331 be fastenedly connected cover board 31, test specimen tube 32 and pedestal 34.
（4）Pedestal 34
Such as Fig. 2,6, pedestal 34 includes pedestal fluid hole 341, pedestal ring-shaped step 342, annular groove 343 and threaded hole
344；
Pedestal 34 is a kind of spill round platform, the side wall of spill round platform is provided with pedestal fluid hole 341, in spill round platform
Top be respectively arranged with from top to bottom 3 descending annular grooves 343 for place test specimen tube 32, lower O-ring 382 and under
Permeable stone 37 is provided with the threaded hole 344 fastened for erectting strut 333 on the both sides of spill round platform.
3rd, working mechanism
Liquid-collecting bottle 20 and leaching 30 are placed in different elevations so that between there are an external head difference, in this water
Under the action of head difference, leachate is made to replace the original pore solution ingredient of the soil body through the soil body, it is dense to reach required chemistry
Degree.The advantage is that rapidly change solution composition and soil sample pore solution uniform concentration distribution obtained.
2nd, test method
This test method includes the following steps：
1. sample preparation
Sample is cutting ring sample, using compacting process, compacting or mud sample preparation method, can also directly use undisturbed；
2. fill sample
The upper sample 01 prepared and lower sample 02 are packed into test specimen tube 32；By 32 traverse of test specimen tube during dress sample, first fill
Enter upper sample 01, wet filter paper is attached to 01 upper surface of sample, then embedded upper O-ring 381 and be put into upper dankness stone 35, then will be up and down
The middle permeable stone 36 that face paste has wet filter paper is put into sample sleeve 32, is then charged into lower sample 02, pastes wet filter paper in lower sample 02
Upper surface, then embedded lower O-ring sealing 382 and lower permeable stone 37, are finally put into securing bracket 33 by the sample sleeve 32 installed
In, cover board 31 is covered, cover board 31, test specimen tube 32 and pedestal 34 are fastenedly connected by rotation screw rod 331；
3. leaching instrument 30 is installed
The inlet opening 321 at 32 middle part of test specimen tube of liquid-collecting bottle 20 and leaching instrument 30 is connected with rubber catheter 40, makes liquid-collecting bottle
20 connect with leaching instrument 30, liquid-collecting bottle 20 are controlled to close by adjusting the position of bearing plate 14 according to the difference for being packed into sample nature
Suitable height；
4. leaching
The filtrate of leaching needed for being packed into liquid-collecting bottle 20, opens the tongs of rubber catheter 40, filtrate is allowed to flow into leaching
In instrument 30, after the air in leaching instrument 30 is discharged by gas vent 322, the gas vent 322 of test specimen tube 32, filter are clamped with tongs
Liquid starts leaching through upper sample 01 and lower sample 02；
5. sentence steady
It is accepted with the vial with vaporization prevention function from cover board fluid hole（311）With pedestal fluid hole（341）What leaching went out
Filtrate, and the conductivity of filtrate gone out with conductivity meter measurement leaching, comparison filter liquor conductivity are big with leachate conductivity
It is small whether to be close, to determine whether leaching is completed.
Claims (1)
1. a kind of remodeling saturated soil water chemistry leaching test device, including as by the upper sample of leaching object（01）With lower sample
（02）；
Experimental rig is provided with head stent（10）, liquid-collecting bottle（20）, leaching instrument（30）And rubber catheter（40）；
Upper sample（01）With lower sample（02）It is positioned over leaching instrument（30）In；
Liquid-collecting bottle（20）With leaching instrument（30）It is individually positioned in head stent（10）Upper and lower level on；
Liquid-collecting bottle（20）With leaching instrument（30）Between pass through rubber catheter（40）Connection；
Head stent（10）To liquid-collecting bottle（20）Different initial water pressure differences is provided；
It is characterized in that：
The leaching instrument（30）Including cover board（31）, test specimen tube（32）, securing bracket（33）, pedestal（34）, upper dankness stone
（35）, middle permeable stone（36）, lower permeable stone（37）, upper O-ring（381）, lower O-ring（382）With pagoda mouth（39）；
Its position and connection relation are：
From top to bottom, cover board（31）, test specimen tube（32）And pedestal（34）Pass through securing bracket（33）It is sequentially connected, composition one adds
The full-closed structure of pressure, between and pass through upper O-ring（381）With lower O-ring（382）Sealing, prevents leachate from test specimen tube
（32）It overflows；
In test specimen tube（32）It is interior, from top to bottom, cover board（31）, upper dankness stone（35）, upper O-ring（381）, upper sample（01）, in
Permeable stone（36）, lower sample（02）, lower O-ring（382）, lower permeable stone（37）And pedestal（34）It is sequentially connected；
Pagoda mouth（39）For cover board fluid hole（311）, pedestal fluid hole（341）, test specimen tube inlet opening（321）, test specimen tube
Gas vent（322）, it is connected through a screw thread；
The cover board（31）It is a kind of metal round block, its side is provided with cover board fluid hole（311）, in the above center set
It is equipped with hemispherical groove（312）, it is provided with cover board ring-shaped step in its lower section（313）；Screw rod with rotation hand wheel（331）
Hemispherical groove is inserted into lower end（312）It is interior；
The test specimen tube（32）It is a kind of metal cylinder, its side wall is provided with inlet opening（321）, gas vent（322）And sample
Ring-shaped step on cylinder（323）, ring-shaped step under test specimen tube（324）；Upper O-ring（381）It is placed in ring-shaped step on test specimen tube
（323）On；Lower O-ring（382）It is placed in ring-shaped step under test specimen tube（324）On；
The securing bracket（33）Including two setting struts（333）, the intermediate crossbeam carried through screw thread（332）With with
The screw rod of rotation hand wheel（331）；Erect strut（333）Upper end and crossbeam（332）It is connected through a screw thread, erects strut
（333）Lower end screws in pedestal（34）On threaded hole（344）In, screw rod is rotated by handwheel（331）Make cover board（31）, examination
Sample cylinder（32）And pedestal（34）It is fastenedly connected；
The pedestal（34）Including pedestal fluid hole（341）, pedestal ring-shaped step（342）, annular groove（343）And threaded hole
（344）；Pedestal（34）It is a kind of spill round platform, the side wall of spill round platform is provided with pedestal fluid hole（341）, annular groove
（343）For placing test specimen tube（32）, pedestal ring-shaped step（342）O-ring under upper placement（382）, pedestal ring-shaped step（342）
Inside is used to place lower permeable stone（37）；It is provided on the both sides of spill round platform for erectting strut（333）The threaded hole of fastening
（344）.
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| CN201610078904.5A CN105547787B (en) | 2016-02-04 | 2016-02-04 | Remold saturated soil water chemistry leaching test device and its method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610078904.5A CN105547787B (en) | 2016-02-04 | 2016-02-04 | Remold saturated soil water chemistry leaching test device and its method |
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| Publication Number | Publication Date |
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| CN105547787A CN105547787A (en) | 2016-05-04 |
| CN105547787B true CN105547787B (en) | 2018-06-22 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866384B (en) * | 2016-06-03 | 2018-03-30 | 天津城建大学 | A kind of pore water salinity displacement and consolidation experimental rig |
| CN110595985A (en) * | 2019-10-29 | 2019-12-20 | 中南大学 | Geotextile performance testing system and method for compacted grouting soil nails |
| CN112964524B (en) * | 2021-02-04 | 2023-01-20 | 中国建筑第四工程局有限公司 | Indoor soil sample saturation device and application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2027910A (en) * | 1978-08-10 | 1980-02-27 | Jardine R | Apparatus for and method of performing soil permeability tests |
| CN101738458A (en) * | 2009-12-18 | 2010-06-16 | 中国科学院武汉岩土力学研究所 | Specimen tube for earth-pillar hydrochemical leaching experiment |
| CN204128930U (en) * | 2014-04-04 | 2015-01-28 | 河海大学 | The vertical permeability apparatus of a kind of geotextile |
| CN105115832A (en) * | 2015-06-26 | 2015-12-02 | 中国科学院地质与地球物理研究所 | Geotechnical oblique shear strength test apparatus considering seepage flow impact |
| CN205483725U (en) * | 2016-02-04 | 2016-08-17 | 桂林理工大学 | Remold saturated native water chemistry leaching test device |
-
2016
- 2016-02-04 CN CN201610078904.5A patent/CN105547787B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2027910A (en) * | 1978-08-10 | 1980-02-27 | Jardine R | Apparatus for and method of performing soil permeability tests |
| CN101738458A (en) * | 2009-12-18 | 2010-06-16 | 中国科学院武汉岩土力学研究所 | Specimen tube for earth-pillar hydrochemical leaching experiment |
| CN204128930U (en) * | 2014-04-04 | 2015-01-28 | 河海大学 | The vertical permeability apparatus of a kind of geotextile |
| CN105115832A (en) * | 2015-06-26 | 2015-12-02 | 中国科学院地质与地球物理研究所 | Geotechnical oblique shear strength test apparatus considering seepage flow impact |
| CN205483725U (en) * | 2016-02-04 | 2016-08-17 | 桂林理工大学 | Remold saturated native water chemistry leaching test device |
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