CN205246495U - Test device is blockked up in normal velocity of flow infiltration of soil - Google Patents
Test device is blockked up in normal velocity of flow infiltration of soil Download PDFInfo
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- CN205246495U CN205246495U CN201521020642.4U CN201521020642U CN205246495U CN 205246495 U CN205246495 U CN 205246495U CN 201521020642 U CN201521020642 U CN 201521020642U CN 205246495 U CN205246495 U CN 205246495U
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Abstract
The utility model discloses a test device is blockked up in normal velocity of flow infiltration of soil. Constitute by a cylindrical infiltration section of thick bamboo, differential pressure sensor, constant flow pump, magnetic stirrers, laser particle analyzer, the storage water tank of intaking, valve, pressure hose, play water header tank etc, it blocks up the sample to intake to put in in the storage water tank to through the magnetic stirrers stirring, make and stop up the sample suspension in going into the sepage, use the constant flow pump to keep seepage flow constant flow, adopt differential pressure sensor to replace traditional pressure -measuring pipe simultaneously and measure a plurality of different seepage flow sections department seepage pressure, the automatic acquisition test data in succession of ability, can reflection directly perceived block up the law that granule particle size, quantity and seepage flow time change to seepage pressure, sample permeability, can change the particle diameter and the content in going into the sepage that stop up the sample to can carry out infiltrations continuous, the different velocities of flow to experimental soil sample and block up the experiment, the migration of research granule is to the influence of soil body permeance property.
Description
Technical field
The utility model relates to the infiltration clogging testing device of soil under normal flow condition, tiny by carryingThe seepage flow of the pore water of particulate in soil, simulation particulate gathers and is deposited in soil body hole and causes seepage flow logicalRoad diminishes, and reduces the process of soil body penetration performance. The utility model is exactly the examination that quantification is tested this kind of effectExperiment device.
Background technology
In recent years, the slope geological hazards such as landslide, mud-rock flow take place frequently, the permeance property pair of research slope soilThe research of the stability analysis on slope and slope disaster mechanism is all significant. Slope soil infiltration coefficientBe an important indicator of reflection slope soil penetrating power, generally can record by on-the-spot and laboratory test.Existing test mostly records soil body osmotic coefficient taking pure water as percolating medium, and in real process, current can be takenBand fine earth particle, the permeance property to the soil body in flow event exerts an influence, particularly stronger to dispersivenessOr the poor slope soil of erosion resistance, wherein the plasma concentration containing in current is higher, with orderThe soil body osmotic coefficient error that front laboratory adopts pure water to record is larger, thus can affect seepage of slope analysis andThe result of its stability analysis.
The internal diameter of the instrument of at present conventional indoor measurement soil body osmotic coefficient is less, is suitable for the particle diameter model of the soil bodyEnclose less, and can not simulate with quantitative evaluation soil body hole by current carry particulate stop up situation, be difficult toReflection actual conditions.
The infiltrative instrument of indoor measurement soil adopts constant head test or varying head test conventionally at present, and water existsSeepage velocity in the soil body is generally by calculating, but can stop up the soil body in the time containing plasma in currentHole can reduce seepage velocity.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of existing permeameter aspect above-mentioned, provides one to be applicable toCarry the percolating medium of particulate to the sex experimental rig of soil body penetration.
The utility model is achieved in that a kind of permanent current speed infiltration clogging testing device of soil, comprises into waterStorage tank, magnetic agitation instrument, the first water inlet pressure hose, constant flow pump, the first valve, second are intake withstand voltageFlexible pipe, water inlet top cover, the first porous disc, the first flange, cushion, the first infiltration cylinder, the second flange,The second infiltration cylinder, filter screen, the second porous disc, water outlet bottom, three-flange, water outlet header tank, second valveDoor, the first water outlet pressure hose, the first threeway, the second water outlet pressure hose, the 3rd valve, laser particle sizeInstrument, the 3rd water inlet pressure hose, the 4th valve, the second threeway, differential pressure pick-up and data collecting instrument.
Magnetic stirring apparatus is placed in into water storage tank, and water inlet storage tank is by the first water inlet pressure hose and constant currentPump is connected, and the constant flow pump other end connects the first valve, and the first valve is by the second water inlet pressure hose and water inletTop cover is connected, and water inlet top cover is connected with the first infiltration cylinder by the first flange, and a first infiltration top arranges theOne porous disc, the first porous disc below arranges cushion, and the first infiltration cylinder and the second infiltration cylinder are by the second methodBlue being connected, the first infiltration cylinder and second infiltration cylinder the same side arrange row's differential pressure pick-up, and differential pressure pick-up is establishedBe placed in and permeate on the same straight line of an axis parallel, differential pressure pick-up is connected with data collecting instrument respectively,The second infiltration cylinder bottom arranges the second porous disc, and the second porous disc top arranges filter screen, and the second infiltration cylinder passes throughThree-flange is connected with water outlet bottom, and water outlet bottom is by the first water outlet pressure hose and the second threeway and water outletHeader tank is connected, and on the first water outlet pressure hose, the second valve is set, and residue one end of the second threeway is passed throughThe second water outlet pressure hose is connected with laser particle analyzer, and the 3rd valve is set on the second water outlet pressure hose,Residue one end of the first threeway is connected with laser particle analyzer by the 3rd water inlet pressure hose, resistance in the 3rd water inletPress flexible pipe that the 4th valve is set.
The first described infiltration cylinder and the second infiltration cylinder total length are 30-40cm, internal diameter is 18-25cm, theOne porous disc and the second porous disc are all that diameter is the lucite with holes that 18-25cm, thickness are 3-5mmCircular slab, aperture is 4-6mm, cushion is the gravel layer that 2-3cm is thick.
Described cushion is the gravel layer that 2-3cm is thick. Cushion is set and alleviates percolating fluid washing away sample topEffect, filter screen mainly plays particle in restriction sample and directly enters in outlet pipe and Control Assay seepage stabilityEffect.
Connect water outlet header tank at the second infiltration end, open and close the 3rd valve valve of sampling, by laser grainDegree instrument is measured granular size and distribution thereof in percolating fluid; Water outlet header tank can be by promoting its position height in examinationTest and frontly carry out saturated to sample.
The first described infiltration cylinder and second infiltration cylinder the same side arrange differential pressure pick-up, differential pressure pick-up settingIn with the same straight line of infiltration cylinder axis parallel on, differential pressure pick-up connection data Acquisition Instrument, and with calculatingMachine is connected, can Real-time Collection analytical test data.
Described laser particle analyzer can be measured particle diameter and the distribution characteristics thereof of particulate in water inlet and water outlet, specifically establishesBe set at water inlet pressure hose and water outlet pressure hose connecting tee, and Sampler valves is set carries out Discontinuous sampling,For laser particle analyzer real-time analysis.
Described magnetic stirring apparatus is arranged in water storage tank, the obstruction of adding for being stirred into sepageGrain, is suspended in sepage it more equably.
The beneficial effects of the utility model are: the constant flow that is controlled at seepage flow in process of the test by constant flow pumpConstant, and required uninterrupted can be set artificially. By add plugging particle in percolating fluid, grindStudy carefully plugging particle ponding to sample in flow event. And analyze exit by laser particle analyzer and oozeThe granular size that runs off in flow liquid and particle distribution characteristics, can contrast the feature that flows into and flow out particle. FinalTo the percolating medium that carries particulate to the sex quantitative evaluation of soil body penetration.
Brief description of the drawings
Fig. 1 is the permanent current speed infiltration clogging testing device structural representation of the utility model soil.
Mark in figure: the 1-storage tank of intaking, 2-magnetic agitation instrument, 3-first pressure hose of intaking, 4-constant flow pump,5-the first valve, 6-second pressure hose of intaking, 7. water inlet top cover, 8-the first porous disc, 9-the first flange,10-cushion, 11. first infiltration cylinders, 12-the second flange, 13-the second infiltration cylinder, 14-filter screen, 15-second is saturatingWater plate, 16-water outlet bottom, 17-three-flange, 18-water outlet header tank, 19-the second valve, 20-the first water outletPressure hose, 21-the first threeway, 22-the second water outlet pressure hose, 23-the 3rd valve, 24-laser particle analyzer,25-the 3rd water inlet pressure hose, 26-the 4th valve, 27-the second threeway, 28-differential pressure pick-up, 2-data acquisitionCollection instrument.
Fig. 2 is the soil body normalization infiltration system that the permanent current speed infiltration clogging testing device of the utility model soil recordsNumber is with the relation curve of time of penetration.
Fig. 3 be the permanent current speed infiltration clogging testing device of the utility model soil record enter plugging particle in sepageGrading curve with seepage flow loss particle.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described further.
Embodiment:
A permanent current speed infiltration clogging testing device for soil, comprises into water storage tank 1, magnetic agitation instrument 2, theOne water inlet pressure hose 3, constant flow pump 4, the first valve 5, the second water inlet pressure hose 6, water inlet top cover 7, theOne porous disc 8, the first flange 9, cushion 10, the first infiltration cylinder 11, the second flange 12, the second infiltration cylinder13, filter screen 14, the second porous disc 15, water outlet bottom 16, three-flange 17, water outlet header tank 18, secondValve 19, the first water outlet pressure hose 20, the first threeway 21, the second water outlet pressure hose 22, the 3rd valve23, laser particle analyzer 24, the 3rd water inlet pressure hose 25, the 4th valve 26, the second threeway 27, differential pressure passSensor 28 and data collecting instrument 29.
Magnetic stirring apparatus 2 is placed in into water storage tank 1, and water inlet storage tank 1 is by the first water inlet pressure hose 3Be connected with constant flow pump 4 with the first threeway 27, constant flow pump 4 other ends connect the first valve 5, the first valves 5Be connected with water inlet top cover 7 by the second water inlet pressure hose 6, water inlet top cover 7 passes through the first flange 9 and theOne infiltration cylinder 11 is connected, and the first infiltration cylinder 11 tops arrange the first porous disc 8, the first porous disc 8 belows and areCushion 10, the first infiltration cylinders 11 are connected by the second flange 12 with the second infiltration cylinder 13, the first infiltration cylinder11 and second infiltration cylinder 13 the same sides one row's differential pressure pick-up 28 is set, differential pressure pick-up 28 is arranged at and theOn the same straight line of one infiltration cylinder 11 and the second infiltration cylinder 13 axis parallels, differential pressure pick-up 28 respectivelyBe connected with data collecting instrument 29, the bottom of the second infiltration cylinder 13 arranges the second porous disc 15, permeable secondSteel net 14, the second infiltration cylinders 13 that aperture 2mm is set on plate 15 pass through the 3rd with water outlet bottom 16Flange 17 is connected, and water outlet bottom 16 is by the first water outlet pressure hose 20 and the second threeway 21 and water outlet collectionWater tank 18 is connected, and the residue of the second valve 19, the second threeways 21 is set on the first water outlet pressure hose 20One end is connected with laser particle analyzer 24 by the second water outlet pressure hose 22, at the second water outlet pressure hose 22On the 3rd valve 23, the first threeways 27 are set residue one end by the 3rd water inlet pressure hose 25 and laserParticle size analyzer 24 is connected, and at the 3rd water inlet pressure hose 25, the 4th valve 26 is set.
Described the first infiltration cylinder 11 and the second infiltration cylinder 13 are made by transparent lucite, and total length is 30Cm, internal diameter are 19cm, and the first porous disc 8 and the second porous disc 15 are all that diameter is that 19cm, thickness are 3The lucite circular slab with holes of mm, aperture is 4mm, cushion 10 is the gravel layer that 2-3cm is thick.
At the first infiltration cylinder 11 and the second infiltration cylinder 13 1 side seepage pressure monitoring holes, differential pressure pick-ups 28 are installedInstallation method is: two impulse pipelines of differential pressure pick-up 28 are respectively installed in adjacent two holes, simultaneouslyThe gap of good seal differential pressure pick-up 28 and junction, stack shell hole, and use bolt to be fixed; And differential pressure is passedSensor 28 other end connection data Acquisition Instruments 29, data collecting instrument 29 connects computer.
Utilize the permanent current speed infiltration clogging testing device of above-mentioned soil to permeate blocking test concrete steps to be:
One. filling sample, sample is filled between infiltration cushion 10 and filter screen 14, adopts layering dress sample method,Every layer of about 10cm of soil sample, by the tamping of design density, and interlayer plane hair, complete sample and load.
Two. in water outlet header tank 18, pack clear water into, and control the position of water outlet header tank 18, guarantee that liquid level is notHigher than sample bottom, the infiltration coefficient of sample according to a preliminary estimate, determine and promote speed, open the first valve 5 and theTwo valves 19 also promote water outlet header tank 18, and the air in emptying pipeline and sample or bubble, make sample saturated.
Three. inject clear water in water inlet in storage tank 1, and add plugging agent by the concentration that enters sepage of design in advanceQuantity, and it is even by suspension agitation to start magnetic stirring apparatus 2.
Four. set the flow velocity of constant flow pump 4, close the 4th valve 26 and the 3rd valve 23, turn-on data Acquisition Instrument29, open constant flow pump 4 and permeate blocking test.
Five. calculate in real time the Changing Pattern of soil sample infiltration coefficient in flow event according to Darcy's law, and set upInfiltration coefficient is relation over time.
Six. infiltration coefficient adopts Darcy's law to calculate, need to be by differential pressure pick-up 28 readings (unit is kPa)Be converted into head difference hi(cm), then by the seepage flow flow Q (cm of constant flow pump 43/ s), specimen length li(cm)、Sample seepage area A (cm2) calculation permeability coefficient in substitution Darcy's law expression formula:
In formula: KiThe-the i soil section is the infiltration coefficient of the measured sample section of same differential pressure pick-up (28),Unit: cm/s;
Q-seepage discharge, unit: cm3/s；
The cross-sectional area of A-earth pillar body, unit: cm2；
liThe length of the-the i section earth pillar, unit: cm;
hiThe-the i section earth pillar loss of flood peak value be the measured pressure differential of same differential pressure pick-up,Unit: cm;
The infiltration coefficient computing formula of whole specimen length l is:
By the infiltration coefficient not calculating in the same time, to the soil body, the saturation permeability coefficient under pure water infiltration carries outNormalized, finally obtains the Changing Pattern of sample normalization infiltration coefficient with time of penetration. Test is finalObtain sample normalization infiltration coefficient with the Changing Pattern of time of penetration as shown in Figure 2.
Seven, using laser particle analyzer 24 to measure particle in infiltrate and diffusate according to required time interval suspendsFeature. When what test was surveyed enters sepage and 10min, in percolating fluid, run off particle size distribution feature as Fig. 3Shown in.
Claims (1)
1. a native permanent current speed infiltration clogging testing device, comprise into water storage tank (1), magnetic agitation instrument (2), the first water inlet pressure hose (3), constant flow pump (4), the first valve (5), the second water inlet pressure hose (6), water inlet top cover (7), the first porous disc (8), the first flange (9), cushion (10), the first infiltration cylinder (11), the second flange (12), the second infiltration cylinder (13), filter screen (14), the second porous disc (15), water outlet bottom (16), three-flange (17), water outlet header tank (18), the second valve (19), the first water outlet pressure hose (20), the first threeway (21), the second water outlet pressure hose (22), the 3rd valve (23), laser particle analyzer (24), the 3rd water inlet pressure hose (25), the 4th valve (26), the second threeway (27), differential pressure pick-up (28) and data collecting instrument (29), it is characterized in that magnetic stirring apparatus (2) is placed in into water storage tank (1), water inlet storage tank (1) is connected with constant flow pump (4) with the first threeway (27) by the first water inlet pressure hose (3), constant flow pump (4) other end connects the first valve (5), the first valve (5) is connected with water inlet top cover (7) by the second water inlet pressure hose (6), water inlet top cover (7) is connected with the first infiltration cylinder (11) by the first flange (9), first infiltration cylinder (11) top arranges the first porous disc (8), the first porous disc (8) below is cushion (10), the first infiltration cylinder (11) is connected by the second flange (12) with the second infiltration cylinder (13), the first infiltration cylinder (11) and second infiltration cylinder (13) the same side arrange row's differential pressure pick-up (28), differential pressure pick-up (28) is arranged at the first infiltration cylinder (11) and second and permeates on the same straight line of cylinder (13) axis parallel, differential pressure pick-up (28) is connected with data collecting instrument (29) respectively, the bottom of the second infiltration cylinder (13) arranges the second porous disc (15), the filter screen (14) of aperture 2mm is set on the second porous disc (15), the second infiltration cylinder (13) is connected by three-flange (17) with water outlet bottom (16), water outlet bottom (16) is connected with water outlet header tank (18) with the second threeway (21) by the first water outlet pressure hose (20), on the first water outlet pressure hose (20), the second valve (19) is set, residue one end of the second threeway (21) is connected with laser particle analyzer (24) by the second water outlet pressure hose (22), the 3rd valve (23) is set on the second water outlet pressure hose (22), residue one end of the first threeway (27) is connected with laser particle analyzer (24) by the 3rd water inlet pressure hose (25), at the 3rd water inlet pressure hose (25), the 4th valve (26) is set,
The first described infiltration cylinder (11) and second infiltration cylinder (13) total length are 30-40cm, internal diameter is 18-25cm, the first porous disc (8) and the second porous disc (15) are all that diameter is the circular slab with holes that 18-25cm, thickness are 3-5mm, aperture is 4-6mm, and cushion (10) is the gravel layer that 2-3cm is thick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521020642.4U CN205246495U (en) | 2015-12-10 | 2015-12-10 | Test device is blockked up in normal velocity of flow infiltration of soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521020642.4U CN205246495U (en) | 2015-12-10 | 2015-12-10 | Test device is blockked up in normal velocity of flow infiltration of soil |
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| CN205246495U true CN205246495U (en) | 2016-05-18 |
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| CN201521020642.4U Expired - Fee Related CN205246495U (en) | 2015-12-10 | 2015-12-10 | Test device is blockked up in normal velocity of flow infiltration of soil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706492A (en) * | 2016-11-21 | 2017-05-24 | 大连理工大学 | Penetration device for researching porous medium whole-zone penetration mechanism |
| CN107167410A (en) * | 2017-06-01 | 2017-09-15 | 三峡大学 | A kind of periodicity comes and goes seepage experimental apparatus and method |
| CN107192651A (en) * | 2017-05-25 | 2017-09-22 | 昆明理工大学 | A kind of tailing dam silting phenomena simulation device |
| CN109030290A (en) * | 2018-08-01 | 2018-12-18 | 中国地质科学院水文地质环境地质研究所 | Salt Transport Characteristics in Soil test platform in underground water under the conditions of a kind of varying head |
| CN110702562A (en) * | 2019-10-25 | 2020-01-17 | 济南大学 | Two-dimensional pore medium water and fine particle migration simulation test device |
-
2015
- 2015-12-10 CN CN201521020642.4U patent/CN205246495U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706492A (en) * | 2016-11-21 | 2017-05-24 | 大连理工大学 | Penetration device for researching porous medium whole-zone penetration mechanism |
| CN107192651A (en) * | 2017-05-25 | 2017-09-22 | 昆明理工大学 | A kind of tailing dam silting phenomena simulation device |
| CN107167410A (en) * | 2017-06-01 | 2017-09-15 | 三峡大学 | A kind of periodicity comes and goes seepage experimental apparatus and method |
| CN107167410B (en) * | 2017-06-01 | 2023-05-02 | 三峡大学 | Periodic round-trip seepage experimental device and method |
| CN109030290A (en) * | 2018-08-01 | 2018-12-18 | 中国地质科学院水文地质环境地质研究所 | Salt Transport Characteristics in Soil test platform in underground water under the conditions of a kind of varying head |
| CN110702562A (en) * | 2019-10-25 | 2020-01-17 | 济南大学 | Two-dimensional pore medium water and fine particle migration simulation test device |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20160518 Termination date: 20161210 |