CN105973782A - Determination instrument and determination method for osmotic coefficients of drilling and coring test part - Google Patents
Determination instrument and determination method for osmotic coefficients of drilling and coring test part Download PDFInfo
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- CN105973782A CN105973782A CN201610355507.8A CN201610355507A CN105973782A CN 105973782 A CN105973782 A CN 105973782A CN 201610355507 A CN201610355507 A CN 201610355507A CN 105973782 A CN105973782 A CN 105973782A
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- 238000012360 testing method Methods 0.000 title claims abstract description 179
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003204 osmotic effect Effects 0.000 title claims abstract description 8
- 238000005553 drilling Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 239000011435 rock Substances 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 17
- 239000012188 paraffin wax Substances 0.000 claims description 23
- 230000008595 infiltration Effects 0.000 claims description 18
- 238000001764 infiltration Methods 0.000 claims description 18
- 230000035699 permeability Effects 0.000 claims description 15
- 230000004888 barrier function Effects 0.000 claims description 12
- 239000004575 stone Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 9
- 238000007569 slipcasting Methods 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 7
- 238000013100 final test Methods 0.000 claims description 3
- 230000001934 delay Effects 0.000 claims 2
- 230000003139 buffering effect Effects 0.000 abstract description 10
- 238000003556 assay Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009863 impact test Methods 0.000 description 2
- 229940057995 liquid paraffin Drugs 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
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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
- 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
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- 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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a determination instrument and determination method for osmotic coefficients of a drilling and coring test part, aiming at effectively avoiding influences of lateral wall seepage, determining the osmotic coefficients of common rock soil bodies and porous concrete and further determining the osmotic coefficients of a drilling and coring test part of the rock soil bodies before and after grouting. The technical scheme of the determination instrument is as follows: the determination instrument comprises a water outlet buffering region, a testing cavity and a water inlet buffering region which are arranged in sequence from top to bottom; the water outlet buffering region, the testing cavity and the water inlet buffering region are fixedly connected to form a sealed cavity; a water outlet is formed in the upper end of a lateral wall of the water outlet buffering region; an exhaust hole is formed in the top of the water outlet buffering region; a water inlet is formed in the lower end of the lateral wall of the water inlet buffering region; in a testing process, a testing part is arranged in the testing cavity; a seepage-proof layer is arranged between the test part and an inner lateral wall of the testing cavity; water permeable layers are arranged at the upper and lower ends in the testing cavity; in the testing process, the testing part is located between the water permeable layers at the two ends and is in contact with the water permeable layers.
Description
Technical field
The present invention relates to technical field of civil engineering, be specifically related to a kind of boring and coring test specimen permeability coefficient determinator and mensuration side thereof
Method.
Background technology
At present, conventional permeameter, particularly test standard osmotic instrument is used to measure machinable medium or loose media placement in layers is situated between
The infiltration coefficient of matter, these permeameteres are not suitable for being obtained the infiltration system of test specimen by core-drilling machine because avoiding sidewall Seepage problems
Number.The existing permeameter for measuring boring and coring test specimen, is mainly used in porous concrete specimens test, the mistake at test specimen two ends
Filter device hole is relatively big, is not suitable for the mensuration of Rock And Soil infiltration coefficient before and after slip casting, and its for avoid sidewall seepage flow measure or
Make more difficult or poor effect.
Summary of the invention
In order to solve the problems of the prior art, the present invention proposes a kind of impact that can be prevented effectively from sidewall seepage flow, can not only measure
Common Rock And Soil and celluar concrete infiltration coefficient, moreover it is possible to the boring of the infiltration coefficient of Rock And Soil boring and coring test specimen before and after mensuration slip casting
Coring test specimen permeability coefficient determinator and assay method thereof.
In order to realize object above, the technical solution adopted in the present invention is:
A kind of boring and coring test specimen permeability coefficient determinator, including the outlet relief area set gradually from top to bottom, test cavity and
Water inlet relief area, outlet relief area, test cavity and water inlet buffering interval are fixed and are connected and composed airtight cavity, outlet
The sidewall upper of relief area offers outlet, and the top of outlet relief area offers aspirating hole, under the sidewall of water inlet relief area
End offers water inlet, in test specimen is positioned over test cavity body during test, arranges impervious barrier, examination between the medial wall of test specimen and test cavity
Testing in cavity two ends up and down and be respectively provided with pervious bed, during test, test specimen contacts between the pervious bed of two ends and with pervious bed.
Described aspirating hole connects vacuum pump.
The upper and lower two ends of sidewall of described test cavity are respectively arranged with water pressure table.
Described impervious barrier is paraffin layer.
Described test cavity body sidewall offers several paraffin inlets.
Described outlet relief area, test cavity and water inlet buffering interval use that flanged plate is fixing to be connected, and outlet relief area and
Water inlet relief area uses sealing rubber ring to seal with the connecting portion of test cavity.
Described outlet relief area and water inlet relief area are provided with the platform for supporting pervious bed with the connecting portion testing cavity
Face.
Described pervious bed uses permeable stone.
A kind of boring and coring test specimen osmotic coefficient investigating method, comprises the following steps:
1) first lower floor's pervious bed is placed in test cavity body, then test specimen is positioned on lower floor's pervious bed, and make test specimen be positioned at
The center position of test cavity, is filled in impervious barrier in test specimen and test cavity body in the space between sidewall, blocks paraffin inlet,
Upper strata pervious bed is placed on the upper end of test specimen, finally by the outlet relief area on upper strata and the water inlet relief area of lower floor and test cavity
Fixing connection after sealing；
2) close water inlet, outlet and water pressure table, open aspirating hole to outlet relief area, water inlet relief area and test
Cavity evacuation, closes aspirating hole, opens water inlet, after water can not go successively to water inlet relief area, open out after evacuation
The mouth of a river and water pressure table；
3) after the water flow stationary of outlet, measure the hydraulic pressure at test specimen two ends, and measure the water yield of outlet in a period of time,
Record test data the infiltration coefficient according to Darcy's law calculation testing piece；
4) step 1 is repeated)～3), test of many times takes the meansigma methods permeability coefficient as final test specimen of infiltration coefficient.
Described test specimen uses Rock And Soil boring and coring test specimen before and after common Rock And Soil test specimen, porous concrete specimens or slip casting.
Compared with prior art, the analyzer of the present invention by the outlet relief area set gradually from top to bottom, test cavity and enters
Relief area, the mouth of a river constitutes airtight cavity, it is provided that experimental enviroment, after the water of water inlet enters water inlet relief area, makes water have necessarily
Pressure, water enters in test specimen through lower floor pervious bed, through upper strata pervious bed after the osmosis of test specimen, and flows into water outlet
Mouth relief area, discharges from outlet, measures the hydraulic pressure at test specimen two ends, and measures the water yield in a period of time, in conjunction with the horizontal stroke of test specimen
Area of section and pressure tap away from, according to Darcy's law, thus obtain the infiltration coefficient of test specimen, additionally test specimen and test cavity body sidewall
Impervious barrier is filled in space, utilizes impervious barrier to seal, prevents the water sidewall seepage flow from test specimen, thus avoid sidewall seepage flow to infiltration
The impact that coefficient is measured.The analyzer of the present invention can not only measure Rock And Soil boring after the loose rock soil body, celluar concrete, slip casting
The infiltration coefficient of coring test specimen, moreover it is possible to mensuration normal concrete, the seepage-resistant grade of rock, and the impact of sidewall seepage flow can be prevented effectively from,
Simple in construction, easy and simple to handle, test error is little.
Further, use vacuum pump to connect aspirating hole, utilize vacuum pump that whole analyzer is carried out evacuation, the most not only may be used
Remove the air impact on seepage flow, moreover it is possible to accelerate test specimen saturated, shorten test period.
Further, impervious barrier uses paraffin layer, and test cavity body sidewall is offered paraffin inlet, during test, liquid paraffin passed through paraffin
Inlet injects in the gap, medial wall of test specimen and test cavity, it is ensured that paraffin solidifies uniformly densely and is filled in gap, places
Water is from test specimen sidewall seepage flow, and paraffin easily removes, and does not affect test next time.
Further, pervious bed uses permeable stone, and permeable stone can be supported on outlet relief area and water inlet relief area and test cavity
Connecting portion table top on, permeable stone can not only support test specimen, additionally it is possible to prevents water impact test specimen, prevents small particle simultaneously
Grain enters, and improves the accuracy of test.
In the assay method of the present invention to space between sidewall in test specimen and test cavity body is carried out Anti-seeping technology after, carry out evacuation,
After evacuation, after the water of water inlet enters water inlet relief area, making water have certain pressure, water enters examination through lower floor's pervious bed
In part, through upper strata pervious bed after the osmosis of test specimen, and flow into outlet relief area, discharge from outlet, measure examination
The hydraulic pressure at part two ends, and measure the water yield in a period of time, in conjunction with the cross-sectional area of test specimen and pressure tap away from, fixed according to darcy
Rule, thus obtain the infiltration coefficient of test specimen, assay method of the present invention can measure rock after the loose rock soil body, celluar concrete, slip casting
The infiltration coefficient of soil body boring and coring test specimen, moreover it is possible to measure normal concrete, the seepage-resistant grade of rock, and sidewall can be prevented effectively from ooze
The impact of stream, the evacuation the most removable air impact on seepage flow, moreover it is possible to accelerate test specimen saturated, shorten test period, the present invention
Method is easy and simple to handle, and test error is little.
Accompanying drawing explanation
Fig. 1 is the structural representation of analyzer of the present invention；
Wherein, 1 water inlet, 2 outlets, 3 water pressure tables, 4 paraffin layers, 5 test cavitys, 6 permeable stones, 7 tube walls, 8
Water inlet relief area, 9 outlet relief areas, 10 fixed screws, 11 flanged plates, 12 sealing rubber rings, 13 aspirating holes, 14 stones
Wax inlet.
Detailed description of the invention
Below in conjunction with specific embodiment and Figure of description, the present invention is further explained.
Seeing Fig. 1, the analyzer of the present invention includes the outlet relief area 9 set gradually from top to bottom, test cavity 5 and enters water
Mouth relief area 8, uses flanged plate 11 to pass through fixed screw between outlet relief area 9, test cavity 5 and water inlet relief area 8
10 fixing connections, and the connecting portion employing sealing rubber ring of outlet relief area 9 and water inlet relief area 8 and test cavity 5
12 seal the cavity that composition is airtight, outlet relief area 9 and water inlet relief area 8 is respectively provided with the connecting portion testing cavity 5
There is the table top for supporting pervious bed.The sidewall upper of outlet relief area 9 offers outlet 2, the top of outlet relief area 9
Portion offers aspirating hole 13, and aspirating hole 13 connects vacuum pump, and the side wall lower ends of the tube wall 7 of water inlet relief area 8 offers into water
Mouth 1, in test specimen is positioned over test cavity 5 during test, arranges impervious barrier between the medial wall of test specimen and test cavity 5, and impervious barrier is
Paraffin layer 4, test cavity 5 sidewall offers several paraffin inlets 14, and in test cavity 5, two ends are respectively provided with pervious bed up and down,
Pervious bed uses permeable stone 6, and during test, test specimen contact between the pervious bed of two ends and with pervious bed, tests on the sidewall of cavity 5
Lower two ends are respectively arranged with water pressure table 3.
The assay method of the present invention, it is characterised in that comprise the following steps:
1) first lower floor's pervious bed is placed in test cavity 5, then test specimen is positioned on lower floor's pervious bed, and makes test specimen position
In the center position of test cavity 5, impervious barrier is filled in the space between test specimen and test cavity 5 medial wall, closure paraffin note
Entrance 14, is placed on the upper end of test specimen, finally by outlet relief area 9 and the water inlet buffering of lower floor on upper strata by upper strata pervious bed
District 8 is fixing after sealing with test cavity 5 to be connected；Test specimen uses rock before and after common Rock And Soil test specimen, porous concrete specimens or slip casting
Soil body boring and coring test specimen；
2) close water inlet 1, outlet 2 and water pressure table 3, open aspirating hole 13 and outlet relief area 9, water inlet are delayed
Rush district 8 and test cavity 5 evacuation, close aspirating hole 13 after evacuation, open water inlet 1, treat that water can not go successively to into water
Behind mouth relief area 8, open outlet 2 and water pressure table 3；
3) after the water flow stationary of outlet 2, measure the hydraulic pressure at test specimen two ends, and measure the water outlet of outlet 2 in a period of time
Amount, record test data the infiltration coefficient according to Darcy's law calculation testing piece, computing formula is:In formula, K is
Infiltration coefficient, Q is the water yield in the outlet t time, and t is time of penetration, and A is the cross-sectional area of test specimen, and L is pressure measurement
Pitch-row, Δ h is head difference (the hydraulic pressure force value conversion recorded by two water pressure gauges obtains)；
4) repeating step 1～3, test of many times takes the meansigma methods permeability coefficient as final test specimen of infiltration coefficient.
The specific works process of analyzer of the present invention:
1) before test, using core-drilling machine to drill through the test specimen of suitable diameter, cutting is polishing to suitable dimension；
2) open fixed screw 10, remove outlet relief area 9, take off sealing rubber ring 12, be initially charged with lower floor's permeable stone, put
Entering test specimen, test specimen position ensures to hit exactly at test cavity 5；
3) at the jack of water pressure table 3, sizeable rubber bar is filled in, top to surface of test piece；
4), after heating solid paraffin liquefies to it, liquid paraffin is injected between test specimen and test cavity 5 from paraffin inlet 14
In space, after paraffin solidifies again, block paraffin inlet, extract sticking plaster, water pressure table 3 is installed in test cavity 5
Two ends up and down；
5) load onto upper strata permeable stone, sealing rubber ring 12, then outlet relief area 9 is fixed with high-strength screw；
6) closing water inlet 1, outlet 2 and water pressure table 3, aspirating hole 13 connects vacuum pump, evacuation, after evacuation, closes
Close evacuating valve, open water inlet 1, after water can not go successively to, open outlet 2 and water pressure table 3；
7) wait for a period of time, after waterflow stabilization, read water pressure meter reading, measure the water yield at outlet 2 with graduated cylinder
And timing, record corresponding data；
8) repeat the above steps, test of many times is averaged.
9) open upper and lower high-strength screw, eject test specimen from side to opposite side.
Analyzer of the present invention by testing cavity 5, water inlet 1, outlet 2, aspirating hole 13, paraffin inlet 14, permeable stone 6,
Water pressure table 3 grade forms.Test cavity 5 is the position placing test specimen, and test specimen is more smaller than test cavity 5 inwall, space between the two
Seal with paraffin layer 4, to stop water paraffin inlet 14 around sidewall seepage flow, test cavity 5 to can ensure that paraffin is uniform
And closely knit filling is in the sidewall；Use vacuum pump from aspirating hole 13 evacuation, the impact on seepage flow of the most removable air, go back
Test specimen can be accelerated saturated, shorten test period；Permeable stone 6 can prevent water impact test specimen, also can prevent small size particle from passing through；
Water pressure table meter is used for measuring measuring point hydraulic pressure；The present invention is possible not only to measure Rock And Soil after the loose rock soil body, celluar concrete, slip casting
The infiltration coefficient of boring and coring test specimen, moreover it is possible to measure normal concrete, the seepage-resistant grade of rock, and sidewall seepage flow can be prevented effectively from
Impact, simple to operate, test error is little.
Claims (10)
1. a boring and coring test specimen permeability coefficient determinator, it is characterised in that include that the outlet set gradually from top to bottom delays
Rush district (9), test cavity (5) and water inlet relief area (8), outlet relief area (9), test cavity (5) and water inlet
Fixing between relief area (8) and connect and compose airtight cavity, the sidewall upper of outlet relief area (9) offers outlet (2),
The top of outlet relief area (9) offers aspirating hole (13), and the side wall lower ends of water inlet relief area (8) offers water inlet
(1), in test specimen is positioned over test cavity (5) during test, between the medial wall of test specimen and test cavity (5), impervious barrier is set, examination
Testing in cavity (5) two ends up and down and be respectively provided with pervious bed, during test, test specimen contacts between the pervious bed of two ends and with pervious bed.
A kind of boring and coring test specimen permeability coefficient determinator the most according to claim 1, it is characterised in that described aspirating hole
(13) vacuum pump is connected.
A kind of boring and coring test specimen permeability coefficient determinator the most according to claim 1, it is characterised in that described test cavity
The upper and lower two ends of sidewall of body (5) are respectively arranged with water pressure table (3).
A kind of boring and coring test specimen permeability coefficient determinator the most according to claim 1, it is characterised in that described impervious barrier
For paraffin layer (4).
A kind of boring and coring test specimen permeability coefficient determinator the most according to claim 4, it is characterised in that described test cavity
Body (5) sidewall offers several paraffin inlets (14).
A kind of boring and coring test specimen permeability coefficient determinator the most according to claim 1, it is characterised in that described outlet
Use the fixing connection of flanged plate (11) between relief area (9), test cavity (5) and water inlet relief area (8), and outlet delays
Rush connecting portion employing sealing rubber ring (12) sealing of district (9) and water inlet relief area (8) and test cavity (5).
A kind of boring and coring test specimen permeability coefficient determinator the most according to claim 6, it is characterised in that described outlet
Relief area (9) and water inlet relief area (8) are provided with the platform for supporting pervious bed with the connecting portion testing cavity (5)
Face.
A kind of boring and coring test specimen permeability coefficient determinator the most according to claim 7, it is characterised in that described pervious bed
Use permeable stone (6).
9. a boring and coring test specimen osmotic coefficient investigating method, it is characterised in that comprise the following steps:
1) first lower floor's pervious bed is placed in test cavity (5), then test specimen is positioned on lower floor's pervious bed, and makes test specimen
It is positioned at the center position of test cavity (5), impervious barrier is filled in the space between test specimen and test cavity (5) medial wall, envelope
Stifled paraffin inlet (14), is placed on the upper end of test specimen, finally by outlet relief area (9) and the lower floor on upper strata by upper strata pervious bed
Water inlet relief area (8) seal with test cavity (5) after fixing be connected；
2) close water inlet (1), outlet (2) and water pressure table (3), open aspirating hole (13) to outlet relief area (9),
Water inlet relief area (8) and test cavity (5) evacuation, close aspirating hole (13), open water inlet (1) after evacuation,
After water can not go successively to water inlet relief area (8), open outlet (2) and water pressure table (3)；
3) after the water flow stationary of outlet (2), measure the hydraulic pressure at test specimen two ends, and measure outlet (2) in a period of time
Water yield, record test data the infiltration coefficient according to Darcy's law calculation testing piece；
4) step 1 is repeated)～3), test of many times takes the meansigma methods permeability coefficient as final test specimen of infiltration coefficient.
A kind of boring and coring test specimen osmotic coefficient investigating method the most according to claim 9, it is characterised in that described examination
Part uses Rock And Soil boring and coring test specimen before and after common Rock And Soil test specimen, porous concrete specimens or slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610355507.8A CN105973782A (en) | 2016-05-25 | 2016-05-25 | Determination instrument and determination method for osmotic coefficients of drilling and coring test part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610355507.8A CN105973782A (en) | 2016-05-25 | 2016-05-25 | Determination instrument and determination method for osmotic coefficients of drilling and coring test part |
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