CN106841003B - Portable multi-depth permeability coefficient field measurement device - Google Patents
Portable multi-depth permeability coefficient field measurement device Download PDFInfo
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- CN106841003B CN106841003B CN201710060000.4A CN201710060000A CN106841003B CN 106841003 B CN106841003 B CN 106841003B CN 201710060000 A CN201710060000 A CN 201710060000A CN 106841003 B CN106841003 B CN 106841003B
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- steel pipe
- current signal
- water tank
- permeability coefficient
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- 230000035699 permeability Effects 0.000 title claims abstract description 32
- 238000005259 measurement Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims description 12
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 230000003204 osmotic effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000002689 soil Substances 0.000 description 10
- 238000011065 in-situ storage Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005527 soil sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a portable multi-depth permeability coefficient on-site measurement device, which comprises a steel pipe main body and is characterized in that: the steel pipe main body consists of hollow steel pipes which are sleeved with each other front and back; a detachable instrument panel is sleeved on the first steel pipe at the outermost side, and a timer and a current signal converter are arranged in the instrument panel; the water level current signal collector is arranged in the steel pipe main body and consists of resistors which are mutually connected in series, a power supply, a power switch, an ammeter and a current signal collector, and the sealed water tank is formed by connecting wires in series; the current change signal collected by the current signal collector is transmitted to the current signal converter, the current signal converter converts the current change signal into a timing trigger signal to trigger the timer to read time data, and the permeability is obtained through the volume change relation between time and water in the water tank. The invention has the characteristics of simple operation, portability, strong function and low cost.
Description
Technical Field
The invention relates to a geotechnical in-situ test device, in particular to a device for measuring permeability coefficient on site.
Background
The permeability coefficient is an index for comprehensively reflecting the permeability of the soil body, and the accurate determination of the numerical value of the permeability coefficient has very important significance for the permeability calculation. The numerical value can be measured in a laboratory or can be obtained by in-situ test on a construction site.
The patent of publication 103091229a is a field test device, but the sealing effect is difficult to ensure due to the unstable structure, and the measurement result may not meet the expected requirement.
The patent with publication number 104155229A is a portable soil surface in-situ vertical infiltration experimental device, but the device has a complex structure and is complex in operation and carrying.
The patent with publication number 103344542A and the patent with publication number 103868838A are both indoor test devices, the indoor test usually adopts methods of in-situ soil sampling and experimental filling, the experimental soil body is close to the on-site compactness in a compaction mode and the like, the in-situ soil permeability characteristic is simulated, the test is convenient, the measurement means is more advanced, but the property of the soil after disturbance is always changed slightly, so that the obtained permeability coefficient is different from that of the on-site soil. Therefore, the obtained result can not reflect the real situation of the soil body.
Disclosure of Invention
In view of the drawbacks of the prior art, the present invention proposes a device for in situ determination of permeability coefficients, which aims to measure permeability coefficients of formations of different depths. The device has the characteristics of simple operation, portability, strong function and low cost.
To achieve the above object, the solution of the present invention is:
the utility model provides a portable many degree of depth osmotic coefficient field measurement device, includes steel pipe main part, its characterized in that: the steel pipe main body is of a telescopic structure and consists of hollow steel pipes which are sleeved with each other front and back; a detachable instrument panel is sleeved on the first steel pipe at the outermost side, and a timer and a current signal converter are arranged in the instrument panel; the steel pipe sleeved at the innermost end is a test pipe, the test pipe consists of a pile head and a test pipe body, and the pile head is detachably connected with the test pipe body through threads; the side wall of the test tube body is provided with a through hole, and a filter screen cover is arranged in the through hole; the water level current signal collector is arranged in the steel pipe main body and consists of a resistor, a power supply, a power switch, an ammeter, a current signal collector and a sealing water tank which are sequentially connected in series, wherein the sealing water tank is arranged between the through hole and the pile head; the through hole is provided with a conduit which is communicated with the sealed water tank, the bottom end of the sealed water tank is provided with a water draining switch, the sealed water tank is provided with a first resistor connecting point, a second resistor connecting point, a third resistor connecting point and a fourth resistor connecting point from bottom to top, resistors are electrically connected between the adjacent resistor connecting points, the first resistor, the second resistor, the third resistor and the fourth resistor are sequentially arranged from bottom to top, and the other end of the fourth resistor is electrically connected with a power supply; the current change signal collected by the current signal collector is transmitted to the current signal converter, and the current signal converter converts the current change signal into a timing trigger signal to trigger the timer and read time data.
Further, the power supply, the power switch, the ammeter, the first resistor, the second resistor, the third resistor and the fourth resistor are arranged in the instrument panel.
Further, the wire is a waterproof wire.
Further, adjacent hollow steel pipes can be fixedly connected through threads.
Still further, cavity steel pipe inner wall keep away from the stake head end and be equipped with the steel pipe check and keep off, the steel pipe check keep off for the ring form, the steel pipe check keep off and restrict the excessive shrink of steel pipe, influence its normal use.
Further, the sealing water tank is made of plastic materials.
Further, a water stop adhesive tape is arranged at the joint of the pile head and the test tube body.
Further, a cushion block is arranged at the end part of the first steel pipe.
Still further, the method for measuring the soil permeability coefficient by using the portable multi-depth permeability coefficient field measuring device comprises the following steps:
when in use, the power switch is closed, and the power switch is turned on after t 0 After a certain time, the water level in the sealed water tank reaches the first connecting point, and electricity is suppliedThe circuit is connected, the first resistor, the second resistor, the third resistor and the fourth resistor start to work, the ammeter starts to have readings, and the current signal converter converts a current change signal transmitted by the current signal collector into a timing trigger signal to trigger the timer 5 to start to work.
Further, as the seepage water in the sealed water tank 7 increases, the water level of the sealed water tank starts to rise, a resistor is short-circuited every rise h, the current of the circuit changes, and a timer records the time point t of the current change 1 ,t 2 ,...,t n Let Δt be the difference between two adjacent time points, and the cross-sectional area of the sealed water tank 7 is S.
Further, the permeability coefficient is calculated according to the acquired data, and the permeability coefficient of each stage can be obtained respectively
Further, an average permeability coefficient is calculated
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has the advantages of small volume occupation ratio when not in use and convenient carrying.
2. The method is simple to operate, most constructors can operate, and the permeability coefficient can be obtained by substituting the data into a formula.
3. The invention relates to an in-situ test experimental device, and the soil permeability coefficient obtained by in-situ measurement is more realistic.
4. The invention can measure the seepage coefficients of the soil with different depths, and the obtained data volume is larger.
5. The invention has low manufacturing cost and stronger popularization.
Drawings
FIG. 1 is an overall view of the device;
FIG. 2 is a partial view of the apparatus;
FIG. 3 is an expanded view of the device;
FIG. 4 is a partial view of a second embodiment;
FIG. 5 is a partial view of a third embodiment of the apparatus;
FIG. 6 is a partial view of a device;
fig. 7 is an instrument circuit connection diagram.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.
In the figure, 1, instrument panel, 2, cushion, 3, power switch, 4, ammeter, 5, timer, 6, steel pipe main body, 7, sealed water tank, 8, through hole, 9, filter screen cover, 10, pile head, 11, steel pipe block, 12, first steel pipe, 13, wire, 14, third resistor, 15, current signal collector, 16, current signal converter, 17, fourth resistor, 18, test pipe body, 19, first resistor connection point, 20, second resistor connection point, 21, third resistor connection point, 22, fourth resistor connection point, 23, first resistor, 24, second resistor.
The utility model provides a portable many degree of depth osmotic coefficient field measurement device, includes steel pipe main part 6, its characterized in that: the steel pipe main body 6 is of a telescopic structure and consists of hollow steel pipes which are sleeved with each other front and back; a detachable instrument panel 1 is arranged on the first steel pipe 12 sleeved on the outermost side, and a timer 5 and a current signal converter 16 are arranged in the instrument panel 1; the steel pipe sleeved at the innermost end is a test pipe, the test pipe consists of a pile head 10 and a test pipe body 18, and the pile head 10 and the test pipe body 18 are detachably connected through threads; the side wall of the test tube body 18 is provided with a through hole 8, and a filter screen cover 9 is arranged in the through hole 8; the water level current signal collector is arranged in the steel pipe main body 6, the water level current signal collector 15 is formed by connecting a resistor, a power supply, a power switch 3, an ammeter 4 and the current signal collector 15 in series in sequence, a sealing water tank 7 is formed by connecting a lead 13 in series, and the sealing water tank 7 is arranged between a through hole 8 and a pile head 10; the through hole 8 is provided with a conduit which is communicated with the sealed water tank 7, the bottom end of the sealed water tank 7 is provided with a water draining switch, the sealed water tank 7 is provided with a first resistor connecting point 19, a second resistor connecting point 20, a third resistor connecting point 21 and a fourth resistor connecting point 22 from bottom to top, resistors are electrically connected between the adjacent resistor connecting points, a first resistor 23, a second resistor 24, a third resistor 14 and a fourth resistor 17 are sequentially arranged from bottom to top, and the other end of the fourth resistor 17 is electrically connected with a power supply; the current change signal collected by the current signal collector 15 is transmitted to the current signal converter 16, and the current signal converter 16 converts the current change signal into a timing trigger signal to trigger the timer 5 and read the time data.
The power supply, the power switch 3, the ammeter 4, the first resistor 23, the second resistor 24, the third resistor 14 and the fourth resistor 17 are arranged in the instrument panel 1.
The wire 13 is a waterproof wire.
Adjacent hollow steel pipes can be fixedly connected through threads.
The inner wall of the hollow steel pipe is provided with a steel pipe grid block 11 at the end far away from the pile head 10, and the steel pipe grid block 11 is in a circular ring shape.
The sealing water tank 7 is made of plastic.
And a water stop adhesive tape is arranged at the joint of the pile head 10 and the test tube body 18.
The end part of the first steel pipe 12 is provided with a cushion block 2.
The distance between every two adjacent resistor connection points is set to be h, and the cross-sectional area of the sealing water tank 7 is set to be S.
In operation, the power switch 3 is closed, and the time t passes 0 After the time, the water level in the sealed water tank 7 reaches the first resistor connection point 19, the circuit is switched on, the first resistor 23, the second resistor 24, the third resistor 14 and the fourth resistor 17 start to work, the ammeter 4 starts to have readings, the current signal converter 16 transmits the signal transmitted by the current signal collector 15 to the timer 5, and the timer 5 starts to work.
With the increase of the seepage water in the sealed water tank 7, the water level of the sealed water tank 7 starts to rise, a resistor is short-circuited at each rising height h, the current of the circuit is changed, and the time is countedThe device 5 records the point in time t at which the current changes 1 ,t 2 ,...,t n Δt is defined as the difference between two adjacent time points.
According to the acquired data, the permeability coefficient is calculated, and the permeability coefficient of each stage can be obtained
Calculating the average permeability coefficient
The above embodiments are merely preferred embodiments for fully explaining the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions and changes are within the scope of this patent by those skilled in the art based on this patent. The protection scope of this patent is subject to the claims.
Claims (8)
1. The utility model provides a portable many degree of depth osmotic coefficient on-spot measuring device, includes steel pipe main part (6), its characterized in that: the steel pipe main body (6) is of a telescopic structure and consists of hollow steel pipes which are sleeved with each other front and back; a detachable instrument panel (1) is arranged on the first steel pipe (12) sleeved on the outermost side, and a timer (5) and a current signal converter (16) are arranged in the instrument panel (1); the steel pipe sleeved at the innermost end is a test pipe, the test pipe consists of a pile head (10) and a test pipe body (18), and the pile head (10) is detachably connected with the test pipe body (18) through threads; the side wall of the test tube body (18) is provided with a through hole (8), and a filter screen cover (9) is arranged in the through hole (8); the water level current signal collector (15) is arranged in the steel pipe main body (6), and consists of a resistor, a power supply, a power switch (3), an ammeter (4), the current signal collector (15) and a sealing water tank (7) which are sequentially connected in series, wherein the sealing water tank (7) is arranged between the through hole (8) and the pile head (10) through a lead (13); the through hole (8) is provided with a conduit which is communicated with the sealed water tank (7), the bottom end of the sealed water tank (7) is provided with a water draining switch, the sealed water tank (7) is provided with a first resistor connecting point (19), a second resistor connecting point (20), a third resistor connecting point (21) and a fourth resistor connecting point (22) from bottom to top, resistors are electrically connected between adjacent resistor connecting points, and the adjacent resistor connecting points are sequentially provided with a first resistor (23), a second resistor (24), a third resistor (14) and a fourth resistor (17) from bottom to top, and the other end of the fourth resistor (17) is electrically connected with a power supply; the current change signals collected by the current signal collector (15) are transmitted to the current signal converter (16), and the current signal converter (16) converts the current change signals into timing trigger signals to trigger the timer (5) and read time data at the same time;
setting the distance between every two adjacent resistor connection points as h, and setting the cross section area of the sealing water tank (7) as S;
when in operation, the power switch (3) is closed, and the power switch is closed after t 0 After the time, the water level in the sealed water tank (7) reaches a first resistor connection point (19), a circuit is connected, the first resistor (23), the second resistor (24), the third resistor (14) and the fourth resistor (17) start to work, the ammeter (4) starts to have readings, the current signal converter (16) transmits a signal transmitted by the current signal collector (15) to the timer (5), and the timer (5) starts to work;
as the seepage water in the sealed water tank (7) increases, the water level of the sealed water tank (7) starts to rise, a resistor is short-circuited at each rising height h, the current of the circuit changes, and a timer (5) records the time point t of the current change 1 ,t 2 ,...,t n Defining deltat as the difference between two adjacent time points;
and calculating the permeability coefficient according to the acquired data, and obtaining the permeability coefficient of each stage respectively.
2. The portable multi-depth permeability coefficient field measurement apparatus according to claim 1, wherein: the power supply, the power switch (3), the ammeter (4), the first resistor (23), the second resistor (24), the third resistor (14) and the fourth resistor (17) are arranged in the instrument panel (1).
3. The portable multi-depth permeability coefficient field measurement apparatus according to claim 1, wherein: the lead (13) is a waterproof lead.
4. The portable multi-depth permeability coefficient field measurement apparatus according to claim 1, wherein: adjacent hollow steel pipes can be fixedly connected through threads.
5. The portable multi-depth permeability coefficient field measurement apparatus according to claim 4, wherein: the inner wall of the hollow steel pipe is provided with a steel pipe grid block (11) at the end far away from the pile head (10), and the steel pipe grid block (11) is in a ring shape.
6. The portable multi-depth permeability coefficient field measurement apparatus according to claim 1, wherein: the sealing water tank (7) is made of plastic.
7. The portable multi-depth permeability coefficient field measurement apparatus according to claim 1, wherein: and a water stop adhesive tape is arranged at the joint of the pile head (10) and the test tube body (18).
8. The portable multi-depth permeability coefficient field measurement apparatus according to claim 1, wherein: the end part of the first steel pipe (12) is provided with a cushion block (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710060000.4A CN106841003B (en) | 2017-01-24 | 2017-01-24 | Portable multi-depth permeability coefficient field measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710060000.4A CN106841003B (en) | 2017-01-24 | 2017-01-24 | Portable multi-depth permeability coefficient field measurement device |
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| CN106841003A CN106841003A (en) | 2017-06-13 |
| CN106841003B true CN106841003B (en) | 2023-07-14 |
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| CN201710060000.4A Active CN106841003B (en) | 2017-01-24 | 2017-01-24 | Portable multi-depth permeability coefficient field measurement device |
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| CN116773408A (en) * | 2023-07-06 | 2023-09-19 | 星辰利源水利水电工程有限公司 | Seepage real-time detection system for hydraulic engineering |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5591898A (en) * | 1995-10-12 | 1997-01-07 | Modern Controls, Inc. | Method for measuring material permeability characteristics |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1679290A1 (en) * | 1988-07-20 | 1991-09-23 | Краснодарский политехнический институт | Device for determining structural parameters of porous materials |
| DE4041960A1 (en) * | 1990-12-24 | 1992-07-02 | Forschzent Bodenfruchtbarkeit | Automated in-situ measurement of infiltration characteristic esp. of soil - measuring times for partial vols. of infiltration liquid to penetrate infiltrated material |
| AUPQ788000A0 (en) * | 2000-05-30 | 2000-06-22 | Structural Monitoring Systems Ltd | Apparatus and method for measurement of the permeability of materials |
| FR2836228B1 (en) * | 2002-02-21 | 2005-08-19 | Inst Francais Du Petrole | METHOD AND DEVICE FOR EVALUATING PHYSICAL PARAMETERS OF AN UNDERGROUND DEPOSIT USING ROCK DEBRIS TAKEN FROM IT |
| WO2003095985A1 (en) * | 2002-05-13 | 2003-11-20 | The University Of Manitoba | Method and probe for measuring hydraulic conductivity of soil |
| CN102323196A (en) * | 2011-05-23 | 2012-01-18 | 申坤 | Design manufacturing and application of triaxial penetration tester |
| CN103278437B (en) * | 2013-05-29 | 2015-09-30 | 浙江大学 | The simulation test device of slurry shield mud film forming process |
| GB2515495B (en) * | 2013-06-24 | 2018-09-26 | Industrial Textiles & Plastics Ltd | Permeability determination |
| CN204142615U (en) * | 2014-09-24 | 2015-02-04 | 中国水利水电第五工程局有限公司 | A kind of osmotic coefficient investigating device |
| CN205103131U (en) * | 2015-09-28 | 2016-03-23 | 河海大学 | A infiltration parameter automatic measuring device for material permeability test |
| CN105527209B (en) * | 2015-12-07 | 2018-04-20 | 河海大学 | A kind of constant pressure type field soil ventilative speed analyzer |
| CN206563699U (en) * | 2017-01-24 | 2017-10-17 | 浙江工业大学 | Portable many depth of penetration coefficient field measurement apparatus |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5591898A (en) * | 1995-10-12 | 1997-01-07 | Modern Controls, Inc. | Method for measuring material permeability characteristics |
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