CN110044796A - Geotechnical fibre filter performance and multifunctional tester - Google Patents
Geotechnical fibre filter performance and multifunctional tester Download PDFInfo
- Publication number
- CN110044796A CN110044796A CN201910402680.2A CN201910402680A CN110044796A CN 110044796 A CN110044796 A CN 110044796A CN 201910402680 A CN201910402680 A CN 201910402680A CN 110044796 A CN110044796 A CN 110044796A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- water tank
- fibre filter
- filter performance
- geotextile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000004746 geotextile Substances 0.000 claims abstract description 33
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000009182 swimming Effects 0.000 claims 1
- 239000012466 permeate Substances 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 description 10
- 239000002689 soil Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 238000007872 degassing Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (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 kind of geotechnical fibre filter performance and multifunctional testers, including upper cylinder, middle cylinder and lower cylinder, it is connected between three cylinders by ring flange, geotextile apparatus for placing to be measured is provided between the middle cylinder and lower cylinder, water inlet, exhaust outlet and pressurization mouth are provided on the upper cylinder, the water inlet connects upstream water tank, the pressurization mouth connects air compressor machine, the lower cylinder side wall setting removes port, water outlet is arranged in bottom, the port that removes connects vacuum pump, and the water outlet connects downstream water tank, and the upstream water tank and downstream water tank are all connected with traction device.The present invention can be used to test geotextile in different Normal stress, go out stream mode and permeate the anti-filter characteristic of the complex conditions such as direction.
Description
Technical field
The present invention relates to geotechnical fibre filter ability meters, and in particular to a kind of geotechnical fibre filter performance and multifunctional survey
Try instrument.
Background technique
Geotextile is a kind of artificial synthesized macromolecule polymeric material, since geotextile has porosity high and aperture
Small feature, therefore water conservancy, ground, environment, municipal administration etc. are widely used in frequently as a kind of novel filtration material in recent years
In engineering, high porosity ensure that water flow has enough infiltration lanes, and small-bore can guarantee the soil particle of composition skeleton not
It is lost.It is compared to traditional filtration material, geotextile has easily construction, the easily advantages such as transport, low cost.Geotextile
Anti-filter characteristic mainly includes permeability, soil conservation and silting.Permeability refers to the property that geotextile allows liquid to seep, and protects
Soil nature refers under the conditions of seepage flow geotextile to the reserve capability of soil particle, and silting refers to geotextile under the conditions of seepage flow
Surface or the internal property blocked by soil particle or other substances.Permeability, soil conservation of the different engineerings to geotextile
It is different with the requirement of silting, so in order to select more appropriate geotextile, it need to be to geotextile in different condition
Under anti-filter characteristic carry out experimental study.
Currently, the experimental study method about geotechnical fibre filter characteristic is many kinds of, includes mainly gradient ratio test, changes
Into gradient ratio test, failing head permeameter, there are pressure permeability test and vacuum filtration test etc..Gradient ratio test is mainly used for surveying
Geotextile is tried to the silting characteristic of non-cohesive soil, can not but study geotextile to the silting characteristic of cohesive soil.Improve gradient
Deficiency than test for gradient ratio test is improved, so as to study geotextile to the silting characteristic of cohesive soil.
Failing head permeameter can simulate the infall process of mud in test, and it is special to the anti-filter of mud to can be used for studying geotextile
Property.There are pressure permeability test and vacuum filtration test to simulate normal pressure to geotechnical fibre filter spy by different methods respectively
The influence of property.Compared by analysis it can be found that the above test method has the following deficiencies: that (1) cannot study geotextile in method
Anti-filter characteristic under to stress state；(2) can not achieve geotechnical fibre filter boundary flood out stream and non-submersion go out flow between
Mutually conversion；(3) anti-filter characteristic of the geotextile under the fluidised form that moves in circles is not can be carried out.And geotextile is applied to reality instead
Engineering is filtered, often different Normal stress can be encountered in the different operation phase, go out stream mode and permeate the complex conditions such as direction.So
If wanting to study anti-filter performance of a certain geotextile under the conditions of above several now, just difference must be done with different instruments
Test, sample state and engineering actual variance are larger and complicated for operation, take time and effort.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of geotechnical fibre filter ability meters, solve existing instrument not
The problem of geotechnical fibre filter performance under different condition can be tested simultaneously.
Technical solution: geotechnical fibre filter geotechnical fibre filter performance and multifunctional tester of the present invention, including it is upper
Cylinder, middle cylinder and lower cylinder are provided with geotextile to be measured and place by flanged joint between three cylinders between the middle cylinder and lower cylinder
Device is provided with water inlet, exhaust outlet and pressurization mouth, the water inlet on the upper cylinder and connects upstream water tank, the pressurization mouth
Connect air compressor machine, the lower cylinder side wall setting removes port, and bottom is arranged water outlet, described except port connects vacuum pump, it is described go out
The mouth of a river connects downstream water tank, and the upstream water tank and downstream water tank are all connected with traction device.
For the size of atmospheric pressure value in monitoring permeability apparatus, air gauge is provided on the pressurization mouth.
For the size of atmospheric pressure value in control permeability apparatus, pressure regulation is provided on the pipeline between the pressurization mouth and air compressor machine
Valve.
To monitor different parts hydraulic pressure force value size and distribution in permeability apparatus, several survey pressure sides are provided on the middle cylinder
Mouthful.
For the infiltration direction in control permeability apparatus, the upstream water tank and downstream water tank are all connected with traction device, described
Traction device includes motor and fixed pulley, and the motor is connect by traction rope with fixed pulley.The traction device can week
The height of change the downstream water tank and upstream water tank of phase property, can carry out geotextile in different hydraulic slopes and the fluidised form that moves in circles
Under filter effciency test.
In order to facilitate geotextile to be measured is placed, the geotextile apparatus for placing to be measured is stainless steel cloth, it is described not
Rust steel wire is fixed in flange groove.
The utility model has the advantages that the present invention can study geotextile in different Normal stress, go out stream mode and infiltration direction etc. is multiple
Anti-filter characteristic under the conditions of miscellaneous.The present invention can study geotextile in different normal direction by aerating pressure device and head control device
Anti-filter characteristic under load.Anti-filter characteristic of the geotextile under different stream modes out can be studied by air bubble eliminating device.Pass through
Head control device can study anti-filter characteristic of the geotextile under different infiltration directions.
Detailed description of the invention
Fig. 1 is a kind of geotechnical fibre filter performance and multifunctional tester schematic diagram provided by the invention.
Specific embodiment
Invention is further described with reference to the accompanying drawing.
As shown in Figure 1, be used for geotechnical fibre filter performance and multifunctional tester, comprising: permeability apparatus, aerating pressure device,
Air bubble eliminating device, head control device and pore water pressure force test device.
Lower cylinder 12 is placed between pedestal 14 and ring flange c11, it is then by bolt that lower cylinder 12 is fixed, close degasification
Tongs on mouth 13, water outlet 15 are connected with downstream water tank 22, and close the tongs on water outlet 15；By stainless steel
Silk screen is placed in the annular groove of ring flange c11, places geotextile to be measured on the net in stainless steel wire, by ring flange b10 and
Ring flange c11 is clamped and is fixed；The fixing means that middle cylinder 7 presses cylinder 12 is fixed, each survey pressure side mouth 8 is connected
To pore water pressure force test device；Dry soil samples or mud sample 9 are fills up in middle cylinder 7 to certain height according to test requirements document,
The fixing means that upper cylinder 5 presses cylinder 12 is fixed.
The tongs on pressurization mouth 4 are closed, the tongs on exhaust outlet 2 is opened, water inlet 3 is connected with upstream water tank 21
It connects, finely tunes the tongs on water inlet 3, allow the water to slowly flow into lower cylinder 5 and undisturbed sample, continue to water from exhaust outlet
2 outflows and the lower bubble-free of top cover 1, close the tongs on exhaust outlet 2.Test can by two kinds of pressuring methods of waterpower and gas come
Study anti-filter characteristic of the geotextile under normal stress state.1) hydraulic pressurization mode: the sealing on water inlet 3 is fully opened
Upstream water tank 21, is adjusted in the height of test requirements document by folder by fixed pulley 23 and motor 24, and will by water system
Height of water level in upstream water tank 21 is kept constant.2) gas pressurized mode: closing the tongs on water inlet 3, by the mouth 4 that pressurizes
Successively it is connected with air gauge 16, pressure regulator valve 17 and air compressor machine 18, opens the tongs on pressurization mouth 4, starting air compressor machine 18 is simultaneously
Pressure regulator valve 17 is adjusted, its atmospheric pressure value for reaching test requirements document is controlled.
Tester of the present invention be able to achieve geotechnical fibre filter boundary flood out stream and non-submersion go out flow between mutual conversion.
1) it floods circulation out and is changed to non-submersion stream out: disconnecting water outlet 15 and 22 phase of downstream water tank full of water in cylinder 12 under this operating condition,
One liquid collecting vessel is placed on 15 lower section of water outlet, one end of Dewar bottle 19 is connected with port 13 is removed, the other end and vacuum
Pump 20 is connected, and opens except the tongs on port 13 and water outlet 15, starting vacuum pump 20 is by removing the downward cylinder 12 of port 13
Water is discharged by water outlet 15, after water in lower cylinder 12 all discharge, closes vacuum pump 20, be then shut off degasification by interior inflation
Tongs on mouth 13, and graduated cylinder is placed under water outlet 15, test its flow.2) non-submersion goes out to circulate to be changed to and flood out
Stream: water outlet 15 is connected by no liquid in cylinder 12 under this operating condition with downstream water tank 22, adjusts the height of downstream water tank 22, makes
Its height is slightly above geotextile, opens water outlet 15 and except the tongs on port 13, flows the water in the water tank of downstream slowly
Enter in lower cylinder 12, when mouth 13 to be degassed there are flowing out, close water outlet 15 and except the tongs on port 13, will except port 13 according to
Secondary to be connected with Dewar bottle 19 and vacuum pump 20, the pico- height for reducing downstream water tank 22 opens water outlet 15 and removes port 13
On tongs, starting vacuum pump 20 is evacuated and manufactures negative pressure in Dewar bottle 19, and the gas in lower cylinder 12 is passed through degasification
Mouth 13 is discharged, and when in lower cylinder 12 without gas, closes vacuum pump 20, is then shut off except the tongs on port 13.
Tester of the present invention can study anti-filter characteristic of the geotextile under the fluidised form that moves in circles.Pass through 23 He of fixed pulley
Motor 24 periodically changes the height of upstream water tank 21 and downstream water tank 22, to realize the stream that moves in circles in test
State.
Claims (6)
1. a kind of geotechnical fibre filter performance and multifunctional tester, which is characterized in that including upper cylinder (5), middle cylinder (7) and lower cylinder
(12), it is connected between three cylinders by ring flange, geotextile to be measured is provided between the middle cylinder (7) and lower cylinder (12) and is placed
Device, water inlet (3), exhaust outlet (2) and pressurization mouth (4) are provided on the upper cylinder (5), and the water inlet (3) connects upstream
Water tank (21), the pressurization mouth (4) connect air compressor machine (18), and lower cylinder (12) the side wall setting removes port (13), bottom setting
Water outlet (15), described except port (13) connection vacuum pump (20), the water outlet (15) connects downstream water tank (22), it is described on
Swimming case (21) and downstream water tank (22) are all connected with traction device.
2. geotechnical fibre filter performance and multifunctional tester according to claim 1, which is characterized in that the pressurization mouth
(4) air gauge (16) are provided on.
3. geotechnical fibre filter performance and multifunctional tester according to claim 1, which is characterized in that the pressurization mouth
(4) pressure regulator valve (17) are provided on the pipeline between air compressor machine (18).
4. geotechnical fibre filter performance and multifunctional tester according to claim 1, which is characterized in that the middle cylinder (7)
On be provided with several survey pressure side mouths (8).
5. geotechnical fibre filter performance and multifunctional tester according to claim 1, which is characterized in that the traction device
Including motor (24) and fixed pulley (23), the motor (24) is connect by traction rope with fixed pulley (23).
6. geotechnical fibre filter performance and multifunctional tester according to claim 1, which is characterized in that the geotechnique to be measured
Fabric apparatus for placing is stainless steel cloth, and the stainless steel cloth is fixed in ring flange groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402680.2A CN110044796A (en) | 2019-05-15 | 2019-05-15 | Geotechnical fibre filter performance and multifunctional tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402680.2A CN110044796A (en) | 2019-05-15 | 2019-05-15 | Geotechnical fibre filter performance and multifunctional tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110044796A true CN110044796A (en) | 2019-07-23 |
Family
ID=67281933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910402680.2A Pending CN110044796A (en) | 2019-05-15 | 2019-05-15 | Geotechnical fibre filter performance and multifunctional tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110044796A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398133A (en) * | 2020-05-14 | 2020-07-10 | 江苏苏源工程检测有限公司 | Soil engineering penetration slope and fall tester |
| CN112540038A (en) * | 2020-12-21 | 2021-03-23 | 滁州学院 | Test device and method for testing coupling permeability characteristics of geotextile and sandy soil |
| CN113218841A (en) * | 2021-04-29 | 2021-08-06 | 同济大学 | Device and method for testing reverse filtration characteristic of geotextile |
| CN113959892A (en) * | 2021-10-08 | 2022-01-21 | 南昌工学院 | Ultra-fine high-density slurry suction filtration experimental system and implementation method |
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| CN109030317A (en) * | 2018-09-05 | 2018-12-18 | 中山大学 | A kind of impervious material osmotic grouting laboratory testing rig |
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| CN103149143A (en) * | 2013-03-04 | 2013-06-12 | 黄河水利委员会黄河水利科学研究院 | Device and method for determining permeability coefficient of coarse-grained soil with super large grain size |
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| CN104597227A (en) * | 2014-12-04 | 2015-05-06 | 浙江大学 | Testing apparatus for double-air-entry-value soil-water characteristic curve of coarse-grain soil |
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|---|---|---|---|---|
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| CN112540038A (en) * | 2020-12-21 | 2021-03-23 | 滁州学院 | Test device and method for testing coupling permeability characteristics of geotextile and sandy soil |
| CN113218841A (en) * | 2021-04-29 | 2021-08-06 | 同济大学 | Device and method for testing reverse filtration characteristic of geotextile |
| CN113959892A (en) * | 2021-10-08 | 2022-01-21 | 南昌工学院 | Ultra-fine high-density slurry suction filtration experimental system and implementation method |
| CN113959892B (en) * | 2021-10-08 | 2023-06-30 | 南昌工学院 | Ultra-fine high-density concentration slurry suction filtration experimental system |
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Application publication date: 20190723 |