CN204758452U - Hypotonicity saturated clay infiltration apparatus - Google Patents
Hypotonicity saturated clay infiltration apparatus Download PDFInfo
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- CN204758452U CN204758452U CN201520592840.1U CN201520592840U CN204758452U CN 204758452 U CN204758452 U CN 204758452U CN 201520592840 U CN201520592840 U CN 201520592840U CN 204758452 U CN204758452 U CN 204758452U
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Abstract
The utility model relates to an about being used for clay hypotonicity saturated clay infiltration apparatus ware, in particular to hypotonicity saturated clay infiltration apparatus in the geology field laboratory. This apparatus includes the air compressor machine, bottle, penetrant unit and water collecting bottle supply water, the air compressor machine passes through the pipeline and communicates supply water bottle and penetrant unit respectively, supply water the bottle through pipeline intercommunication penetrant unit one end, the penetrant unit other end passes through pipeline intercommunication water collecting bottle. The advantage: this device simple structure, convenient operation, the cost of manufacture is lower, can test the osmotic coefficient that obtains cohesive soil accurate, rapidly, and efficiency of software testing is higher, and consuming time less, the practicality is strong.
Description
Technical field
The utility model relate to about in laboratory, geology field for clay low-permeability saturated clay penetration test instrument, particularly a kind of low-permeability saturated clay permeation tester.
Background technology
Cohesive soil aquitard pore water and water-bearing zone in close relations, in recent years because China's economic development is very fast, the excessive exploitation of groundwater resource has employed a large amount of expendable cohesive soil pore water resource, causes some areas to occur the geological hazards such as Ground Subsidence; Another reverse side, because cohesive soil pore water seepage flow is slow, abundant Palaeoclimatic information may be sealed up for safekeeping, by the migration of Study Viscous soil pores water, be conducive to explaining some engineering geology and hydrogeology problems, be conducive to the recovery to palaeohydrogeology, ancient hydrogeochemistry information.At present, coarse grain soil sample paid attention to by traditional infiltration instrument more, less for the clay testing tool compared with particulate, and it is longer that indivedual hyposmosis device exists time of penetration, and the impact by temperature and evaporation is comparatively serious, and degree of accuracy is lower, and error is larger.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of low-permeability saturated clay permeation tester, effectively solve traditional infiltration instrument and pay attention to coarse grain soil sample, less for the clay testing tool compared with particulate, it is longer to there is time of penetration in indivedual hyposmosis device, impact by temperature and evaporation is comparatively serious, degree of accuracy is lower, the defect that error is larger.
The technical scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of low-permeability saturated clay permeation tester, comprise air compressor machine, water supply bottle, permeability apparatus and collection bottle, above-mentioned air compressor machine is communicated with water supply bottle and permeability apparatus respectively by pipeline, above-mentioned water supply bottle is by pipeline communication permeability apparatus one end, and the above-mentioned permeability apparatus other end is by pipeline communication collection bottle.
Above-mentioned permeability apparatus comprises confined pressure room and infiltration mechanism, and above-mentioned infiltration mechanism two ends are fixed on the inwall of both sides, confined pressure room, and above-mentioned air compressor machine is by pipeline communication confined pressure room, and above-mentioned infiltration mechanism two ends are respectively by pipeline communication water supply bottle and collection bottle.
Above-mentioned infiltration mechanism comprises the withstand voltage steel drum of two one end open, rubber sleeve and two permeable stones, two above-mentioned withstand voltage steel drum symmetries are arranged on confined pressure chamber interior two ends, and openend is oppositely arranged, above-mentioned rubber sleeve socket is placed between two withstand voltage steel drums, and two ends are tightly connected by O type circle and confined pressure chamber interior walls, two above-mentioned permeable stones are symmetricly set on the port, two ends, inside of rubber sleeve, form a sample chamber between two above-mentioned permeable stones and rubber sleeve.
Above-mentioned air compressor machine is communicated with water supply bottle and permeability apparatus respectively by triplate line.
Above-mentioned triplate line comprises main line, the first branch pipeline and the second branch pipeline, above-mentioned main line one end is communicated with the first branch pipeline one end with the second branch pipeline respectively, the other end is communicated with air compressor machine, and the above-mentioned first branch pipeline other end is communicated with water supply bottle, and the second branch pipeline other end is communicated with permeability apparatus.
Above-mentioned main line is disposed with the first switch valve and drying device by the one end being communicated with air compressor machine to the other end, above-mentioned first branch pipeline is disposed with second switch valve, the first precise pressure regulating valve and breather cheek valve by the one end being communicated with main line to the one end being communicated with water supply bottle, above-mentioned second branch pipeline is disposed with the 3rd switch valve and the second precise pressure regulating valve by the one end being communicated with main line to the one end being communicated with permeability apparatus.
Above-mentioned water supply bottle is provided with the tensimeter for monitoring water supply bottle air pressure inside.
The pipeline that above-mentioned water supply bottle is communicated with permeability apparatus is provided with tongs.
The beneficial effects of the utility model are:
Low-permeability saturated clay permeation tester structure of the present utility model is simple, and easy to operate, cost of manufacture is lower, and accurately, promptly can test the infiltration coefficient obtaining cohesive soil, testing efficiency is higher, consuming time less, practical.
Accompanying drawing explanation
Fig. 1 is the structural representation of low-permeability saturated clay permeation tester of the present utility model;
Fig. 2 (a) is the time dependent linear distribution figure of water supply bottle head difference logarithm in specimen sample 1 test of the present utility model;
Fig. 2 (b) is the time dependent linear distribution figure of water supply bottle head difference logarithm in specimen sample 2 test of the present utility model;
Fig. 2 (c) is the time dependent linear distribution figure of water supply bottle head difference logarithm in specimen sample 3 test of the present utility model.
In accompanying drawing, the list of parts representated by each label is as follows:
1, air compressor machine, 2, water supply bottle, 3, permeability apparatus, 4, collection bottle, 11, the first switch valve, 12, drying device, 21, second switch valve, 22, the first precise pressure regulating valve, 23, breather cheek valve, 24, tensimeter, 25, tongs, 31, confined pressure room, 32, infiltration mechanism, 33, sample chamber, the 311, the 3rd switch valve, the 312, second precise pressure regulating valve, 321, withstand voltage steel drum, 322, rubber sleeve, 323, permeable stone.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
Embodiment: as shown in Figure 1, the low-permeability saturated clay permeation tester of the present embodiment, comprise air compressor machine 1, water supply bottle 2, permeability apparatus 3 and collection bottle 4, above-mentioned air compressor machine 1 is communicated with water supply bottle 2 and permeability apparatus 3 respectively by pipeline, above-mentioned water supply bottle 2 is by pipeline communication permeability apparatus 3 one end, and above-mentioned permeability apparatus 3 other end is by pipeline communication collection bottle 4.
Above-mentioned permeability apparatus 3 comprises confined pressure room 31 and infiltration mechanism 32, above-mentioned infiltration mechanism 32 two ends are fixed on the inwall of both sides, confined pressure room 31, above-mentioned air compressor machine 1 is by pipeline communication confined pressure room 31, and above-mentioned infiltration mechanism 32 two ends are respectively by pipeline communication water supply bottle 2 and collection bottle 4.
Above-mentioned infiltration mechanism 32 comprises the withstand voltage steel drum 321 of two one end open, rubber sleeve 322 and two permeable stones 323, two above-mentioned withstand voltage steel drum 321 symmetries are arranged on inner two ends, confined pressure room 31, and openend is oppositely arranged, above-mentioned rubber sleeve 322 socket is placed between two withstand voltage steel drums 321, and two ends are connected with confined pressure room 31 inner wall sealing by O type circle, two above-mentioned permeable stones 323 are symmetricly set on the port, two ends, inside of rubber sleeve 322, form a sample chamber 33 between two above-mentioned permeable stones 323 and rubber sleeve 322.
Above-mentioned air compressor machine 1 is communicated with water supply bottle 2 and permeability apparatus 3 respectively by triplate line.
Above-mentioned triplate line comprises main line, the first branch pipeline and the second branch pipeline, above-mentioned main line one end is communicated with the first branch pipeline one end with the second branch pipeline respectively, the other end is communicated with air compressor machine 1, the above-mentioned first branch pipeline other end is communicated with water supply bottle 2, the second branch pipeline other end and is communicated with permeability apparatus 3.
Above-mentioned main line is disposed with the first switch valve 11 and drying device 12 by the one end being communicated with air compressor machine 1 to the other end, above-mentioned first branch pipeline is disposed with second switch valve 21, first precise pressure regulating valve 22 and breather cheek valve 23 by the one end being communicated with main line to the one end being communicated with water supply bottle 2, above-mentioned second branch pipeline is disposed with the 3rd switch valve 311 and the second precise pressure regulating valve 312 by the one end being communicated with main line to the one end being communicated with permeability apparatus 3.
Above-mentioned water supply bottle 2 is provided with the tensimeter 24 for monitoring water supply bottle 2 air pressure inside.
The pipeline that above-mentioned water supply bottle 2 is communicated with permeability apparatus 3 is provided with tongs 25.
The principle of work of low-permeability saturated clay permeation tester: open air compressor machine 1, open the first switch valve 11 of main line, open second switch valve 21, first precise pressure regulating valve 22 and breather cheek valve 23, open the 3rd switch valve 311 and the second precise pressure regulating valve 312, air compressor machine 1 pressurized air produces the fully dry removal excessive moisture of pressure-air drying device 12, import in the confined pressure room 31 of permeability apparatus 3 and water supply bottle 2 by pipeline, to confined pressure room 31 and the continual and steady voltage supply of water supply bottle 2, simultaneously, open the tongs 24 on pipeline that water supply bottle 2 is communicated with permeability apparatus 3, water supply bottle 2 to supply water to the sample chamber 33 of permeability apparatus from bottom water outlet and carries out sample infiltration, be specially, the permeable stone 323 of water in water supply bottle 2 through permeability apparatus 3 one end penetrates into sample, after sample infiltration, permeable stone 323 through infiltration mechanism 32 other end oozes out, imported in collection bottle 4 by pipeline.
The concrete infiltrative method of testing of use low-permeability saturated clay permeation tester test low-permeability saturated clay comprises following step:
The first step: sample specimens makes, and is specially,
S1: leveling sample specimens, by the sample cutting ring pressing in sample of interior painting vaseline, then one deck of being pruned in the soil sample side that cutting ring is depressed, make to be greater than cutting ring internal diameter with the soil sample diameter of cutting ring cutting edge joint;
S2: repeat above-mentioned steps S1, give prominence to cutting ring top to sample;
S3: sample more than cutting ring both sides of pruning, the repeatedly surface of swab, avoids specimen surface pore plugging or sample compression, leaves in dry environment for subsequent use;
S4: the length l of record sample, specimen finish d, calculates specimen cross section area A.
Second step: the sample specimens obtained in the above-mentioned first step is put into vacuum machine and carries out full water 24-72 hour, deposit for subsequent use; Permeable stone 323 in permeability apparatus 3 is taken out and also puts into vacuum machine and carry out full water 24-72 hour, after be installed in permeability apparatus 3;
3rd step: the sample specimens of second step being embezzled water treatment is placed in sample chamber 33, and at permeable stone 323 Surface coating filter paper;
4th step: open tongs 25, in water supply bottle 2, liquid carries out penetration testing to permeability apparatus 3, synchronously, open air compressor machine 1, open the first switch valve 11 of main line, open on pipeline that air compressor machine 1 is communicated with water supply bottle 2 and be disposed with second switch valve 21, first precise pressure regulating valve 22 and breather cheek valve 23, open on pipeline that air compressor machine 1 is communicated with permeability apparatus 3 and be disposed with the 3rd switch valve 31 and the second precise pressure regulating valve 32, to confined pressure room 31 and the continual and steady voltage supply of water supply bottle 2, after having liquid to flow in collection bottle 4, the record inflow of water supply bottle 2 and the aquifer yield of collection bottle 4, when inflow is equal with aquifer yield or close, test the state that tends towards stability, start timing, and record initial water level h in water supply bottle 2
0, water supply bottle 2 internal gas pressure P and initial water header value H
0=h
0+ P/ (ρ
liquidg),
Wherein, ρ
liquidfor fluid density, g is gravity coefficient;
6th step: repetitive measurement, the water level h of the water supply bottle 2 that record different time t is corresponding and head value H=h+P/ (ρ
liquidg), the change dH=H-H of head value in water supply bottle 2 in the t period is obtained
0;
7th step: according to water supply bottle 2 initial head value is provided, and head value is along with the variation relation of time, calculates sample permeability K.
In experimentation, hydraulic gradient is about 2500P (m/m), 0<P<0.8Mpa, minimum division value is 0.01MPa, in conjunction with the initial hydraulic gradient of research both at home and abroad in the past, the scope of pressure in experimentation is adjusted to 0.04-0.55MPa, makes to meet Darcy's law between flow velocity and hydraulic gradient
this instrument is applicable to infiltration coefficient <10
-5the viscosity soil sample of m/s, uses under meeting the condition of air pressure range 0.04-0.55Mpa, avoids the impact that non-linear Darcy Flow produces data.
Experiment is chosen three kinds of specimen sample and is tested, and in experimentation, three kinds of every data of sample test are as following table:
In experimentation, in the t time, the volume flowing through sample transversal section is: dV=-AdH
;
Meanwhile, according to Water-balancing model, obtain by the volume of sample section be
In conjunction with Darcy's law
and dV=-AdH,
derive and draw head value linear changing relation in time in water supply bottle 2:
Above-mentioned Example Test Data table show that the linear distribution figure of the time dependent linear relationship of head value logarithm in water supply bottle is as shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c).
Calculate sample permeability K according to the slope meter of this linear changing relation, permeability K meets
Wherein, infiltration coefficient is as following table:
Low-permeability saturated clay permeation tester structure of the present utility model is simple, and easy to operate, cost of manufacture is lower, and accurately, promptly can test the infiltration coefficient obtaining cohesive soil, testing efficiency is higher, consuming time less, practical.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. a low-permeability saturated clay permeation tester, it is characterized in that: comprise air compressor machine (1), water supply bottle (2), permeability apparatus (3) and collection bottle (4), described air compressor machine (1) is communicated with water supply bottle (2) and permeability apparatus (3) respectively by pipeline, described water supply bottle (2) is by pipeline communication permeability apparatus (3) one end, and described permeability apparatus (3) other end is by pipeline communication collection bottle (4).
2. a kind of low-permeability saturated clay permeation tester according to claim 1, it is characterized in that: described permeability apparatus (3) comprises confined pressure room (31) and infiltration mechanism (32), described infiltration mechanism (32) two ends are fixed on the inwall of confined pressure room (31) both sides, described air compressor machine (1) is by pipeline communication confined pressure room (31), and described infiltration mechanism (32) two ends are respectively by pipeline communication water supply bottle (2) and collection bottle (4).
3. a kind of low-permeability saturated clay permeation tester according to claim 2, it is characterized in that: described infiltration mechanism (32) comprises the withstand voltage steel drum (321) of two one end open, rubber sleeve (322) and two permeable stones (323), two described withstand voltage steel drum (321) symmetries are arranged on confined pressure room (31) inner two ends, and openend is oppositely arranged, described rubber sleeve (322) socket is placed between two withstand voltage steel drums (321), and two ends are connected with confined pressure room (31) inner wall sealing by O type circle, two described permeable stones (323) are symmetricly set on the port, two ends, inside of rubber sleeve (322), a sample chamber (33) is formed between two described permeable stones (323) and rubber sleeve (322).
4. a kind of low-permeability saturated clay permeation tester according to claim 1, is characterized in that: described air compressor machine (1) is communicated with water supply bottle (2) and permeability apparatus (3) respectively by triplate line.
5. a kind of low-permeability saturated clay permeation tester according to claim 4, it is characterized in that: described triplate line comprises main line, the first branch pipeline and the second branch pipeline, described main line one end is communicated with the first branch pipeline one end with the second branch pipeline respectively, the other end is communicated with air compressor machine (1), the described first branch pipeline other end is communicated with water supply bottle (2), and the second branch pipeline other end is communicated with permeability apparatus (3).
6. a kind of low-permeability saturated clay permeation tester according to claim 5, it is characterized in that: described main line is disposed with the first switch valve (11) and drying device (12) by the one end being communicated with air compressor machine (1) to the other end, described first branch pipeline is disposed with second switch valve (21) by the one end being communicated with main line to the one end being communicated with water supply bottle (2), first precise pressure regulating valve (22) and breather cheek valve (23), described second branch pipeline is disposed with the 3rd switch valve (311) and the second precise pressure regulating valve (312) by the one end being communicated with main line to the one end being communicated with permeability apparatus (3).
7. a kind of low-permeability saturated clay permeation tester according to any one of claim 1 to 6, is characterized in that: described water supply bottle (2) is provided with the tensimeter (24) for monitoring water supply bottle (2) air pressure inside.
8. a kind of low-permeability saturated clay permeation tester according to any one of claim 1 to 6, is characterized in that: the pipeline that described water supply bottle (2) is communicated with permeability apparatus (3) is provided with tongs (25).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520592840.1U CN204758452U (en) | 2015-08-07 | 2015-08-07 | Hypotonicity saturated clay infiltration apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520592840.1U CN204758452U (en) | 2015-08-07 | 2015-08-07 | Hypotonicity saturated clay infiltration apparatus |
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| Publication Number | Publication Date |
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| CN204758452U true CN204758452U (en) | 2015-11-11 |
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| CN201520592840.1U Expired - Fee Related CN204758452U (en) | 2015-08-07 | 2015-08-07 | Hypotonicity saturated clay infiltration apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092450A (en) * | 2015-08-07 | 2015-11-25 | 中国地质大学（武汉） | Low-permeability saturated clay permeation testing instrument and method |
| CN105699257A (en) * | 2016-04-18 | 2016-06-22 | 山东大学 | Experimental device applicable to earth-rock contact surface seepage failure and experimental method thereof |
-
2015
- 2015-08-07 CN CN201520592840.1U patent/CN204758452U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092450A (en) * | 2015-08-07 | 2015-11-25 | 中国地质大学（武汉） | Low-permeability saturated clay permeation testing instrument and method |
| CN105699257A (en) * | 2016-04-18 | 2016-06-22 | 山东大学 | Experimental device applicable to earth-rock contact surface seepage failure and experimental method thereof |
| CN105699257B (en) * | 2016-04-18 | 2018-09-04 | 山东大学 | A kind of experimental rig and its test method being suitable for native stone contact surface seepage failure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20180807 |