CN108760599A - A kind of simulating measuring device - Google Patents

A kind of simulating measuring device Download PDF

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Publication number
CN108760599A
CN108760599A CN201810467625.7A CN201810467625A CN108760599A CN 108760599 A CN108760599 A CN 108760599A CN 201810467625 A CN201810467625 A CN 201810467625A CN 108760599 A CN108760599 A CN 108760599A
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CN
China
Prior art keywords
water
cylinder
experiment cylinder
supply
pipe
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
Application number
CN201810467625.7A
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Chinese (zh)
Inventor
徐武
卜鑫涛
赵建宇
张浩源
王伟
孙洪广
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Hohai University HHU
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Hohai University HHU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hohai University HHU filed Critical Hohai University HHU
Priority to CN201810467625.7A priority Critical patent/CN108760599A/en
Publication of CN108760599A publication Critical patent/CN108760599A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082Investigating permeability by forcing a fluid through a sample
    • G01N15/0826Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/0806Details, e.g. sample holders, mounting samples for testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082Investigating permeability by forcing a fluid through a sample

Abstract

The invention discloses a kind of simulating measuring devices, including experiment cylinder, water collection agencies, pressure sensor and FDR probes;Filter screen is arranged for accommodating soil, the experiment cylinder bottom in the experiment cylinder;The side wall of the experiment cylinder is equipped with circular hole, the pressure sensor and FDR probes and is inserted into experiment cylinder from outside by circular hole, for detecting hydraulic pressure and humidity;The water collection agencies include water-supply-pipe and electromagnetic flowmeter, and one end of the water-supply-pipe is used to collect the liquid of experiment cylinder bottom percolation, and the electromagnetic flowmeter is connected on water-supply-pipe;The water collection agencies further include funnel, and the funnel setting is between water-supply-pipe and experiment cylinder.The present invention is when carrying out water infiltration simulation, according to instrument and existing parameter soil permeability coefficient can be quickly measured by having correlation formula, change single infiltration process simulation, can directly obtain it is effective must obtain test data, solve the problems, such as that error is larger and clears up difficulty.

Description

A kind of simulating measuring device
Technical field
The invention discloses a kind of simulating measuring devices, are related to soil test device field.
Background technology
With China human mortality growth, modern agriculture and tourism development, industrialization and urbanization progress faster, and ecology The improvement of environment, the problems such as leading to water resources consumption sustainable growth, shortage of water resources and soil water pollution, become of people's attention Hot spot.Supporting body of the soil water as soil pollutant, in reasonable utilization and seepage flow diffusion etc. by the generally pass of people Note.In recent years, soil water pollution problems getting worse has influenced the cycle of the ecosphere.Study soil moisture movement rule Rule explores the rule of surface water supply underground water under rainfall or irrigation conditions, can be water and soil conservation, water-saving irrigation and anti-pollution treatment Dye provides theoretical reference.Probe into the migration rule of pollutant in the soil with the soil water, first it is to be understood that moisture in the soil Vertical Infiltration rule.At present frequently with indoor soil-column permeability intensity, by simulate moisture in unsaturated soil it is vertical enter It oozes process, studies in unsaturated soil moisture content during moisture Vertical Infiltration and change with time rule.The existing soil water It is divided into and oozes device when in use, can only often carry out single infiltration process simulation, obtained experimental data is less.And due to examination It is relatively low to test earth pillar bottom level, is not suitable for directly measuring seepage discharge using instruments such as graduated cylinders, therefore soil sample can not be unable to measure Infiltration coefficient also calculates the rate of Infiltration.In addition, the above method wants water receiving and the synchronism of timing when implementing It asks higher, otherwise will cause large error;Under be mixed with a large amount of silt impurities in the moisture that oozes, occupy certain mass and volume, Test error can be brought;After existing apparatus use, since earth pillar volume is larger, heavier-weight is inconvenient in cleaning.Mirror In the above reason, testing crew needs one kind that can obtain valid data at present, easy to operate, and can effectively reduce test error Simulating measuring device.
Invention content
The purpose of the present invention is that is unable to measure soil sample infiltration coefficient and infiltration rate to solve simulating process Disadvantage provides a kind of simulating measuring device to improve the problem that error is larger and cleaning is difficult.
To achieve the above object, the technical solution adopted by the present invention is as follows:A kind of simulating measuring device, including experiment Cylinder, water collection agencies, pressure sensor and FDR probes;
The experiment cylinder open top, and the experiment cylinder is for accommodating soil, experiment cylinder bottom setting Filter screen;
The filter screen can be used multilayer asbestos gauge, permeable non-woven fabrics or permeable stone material and be made;Permeation rate should not influence The infiltration rate of portion's earth pillar, while preventing the soil body in column from flowing out, it is also possible to prevent silt and electromagnetic flow valve is damaged;
The side wall of the experiment cylinder is equipped with circular hole, the pressure sensor and FDR probes and is inserted into experiment from outside by circular hole Cylinder, for detecting hydraulic pressure and humidity;
The water collection agencies include water-supply-pipe and electromagnetic flowmeter, and one end of the water-supply-pipe is for collecting experiment cylinder bottom The liquid of portion's infiltration, the electromagnetic flowmeter are connected on water-supply-pipe;The water collection agencies further include funnel, and the funnel is set It sets between water-supply-pipe and experiment cylinder, the funnel is made of organic glass or acrylic material.
Further, further include pedestal, connector is set on the pedestal, the experiment cylinder is connected by connector On pedestal top, the water collection agencies are connected to the inside of pedestal by connector.
Further, the connector is arranged on the upper plate of pedestal, and through-hole, institute are equipped in the middle part of the upper plate The connector stated is ring segment, and the ring segment is wholely set with upper plate, the ring segment and the experiment cylinder and The water collection agencies are bolted, and one week in ring segment is uniformly arranged in bolt, and also sets up washer, ensure junction Uniform force is hardly damaged.
Further, rubber seal is arranged between the experiment cylinder and the funnel respectively in the connector, When preventing detection, experiment water body leakage, the rubber seal between the connector and experiment cylinder is arranged in the upper of connector The lower part outer wall in connector is arranged in portion's inner wall, the rubber seal between the connector and funnel.
Further, pervious bed is set inside the connector, the pervious bed is with the upper plate same Horizontal plane, the diameter of the filter screen are less than the diameter of pervious bed, and the filter screen is arranged close to pervious bed, and pervious bed can be right The soil body in the testing column body of top is played a supporting role.
Further, it is inserted into the testing column soil body after the front end of the pressure sensor and FDR probes winding adhesive waterproof tape Inside, when preventing detection, experiment water body leakage.
Further, the experiment cylinder upper side wall is equipped with water inlet, and the experiment inboard wall of cylinder is equipped with annular Groove, the water inlet connect annular groove, inject water into annular groove.
Further, the water inlet, which goes out, is provided with the first valve.
Further, the other end of the water-supply-pipe connects catch basin, and the is also set up between the water-supply-pipe and catch basin Two valves.
Advantageous effect:1., can be related public by having to existing parameter according to instrument when carrying out water infiltration simulation Formula quickly measures soil permeability coefficient, changes single infiltration process simulation, and can directly obtain effective must obtain test data.
2. the present invention is filtered off the silt in lower infiltration point by filter screen, test error can be reduced, test accuracy is improved.
3. the present invention removes water receiving in experiment from, amount water operation, infiltration process and data record can be carried out at the same time, into one Step reduces the error brought due to manual operation.
4. experiment cylinder in top of the present invention, pedestal are connected with water-supply-pipe by connector, device uses rear dismounting joint The soil sample tested in cylinder is cleaned up, it is convenient to test next time.
Description of the drawings
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is the plan view of base portion;
Fig. 3 is filter screen schematic diagram of the present invention;
Fig. 4 is schematic diagram of base structure of the present invention.
Specific implementation mode
The implementation of technical solution is described in further detail below in conjunction with the accompanying drawings.Following embodiment is only used for more clear Illustrate to Chu technical scheme of the present invention, and not intended to limit the protection scope of the present invention.
As shown in Fig. 1 ~ 4, a kind of simulating measuring device provided by the invention, including experiment cylinder 1, water collection agencies, Pressure sensor 12 and FDR probes 13;
1 open top of experiment cylinder, and the experiment cylinder 1, for accommodating soil, 1 bottom of experiment cylinder is set Set filter screen 4;
The filter screen 4 can be used multilayer asbestos gauge, permeable non-woven fabrics or permeable stone material and be made;Permeation rate should not influence The infiltration rate of portion's earth pillar, while preventing the soil body in column from flowing out, it is also possible to prevent silt and electromagnetic flow valve is damaged;
The side wall of the experiment cylinder 1 is equipped with circular hole, the pressure sensor 12 and FDR probes 13 and is inserted into from outside by circular hole Cylinder 1 is tested, for detecting hydraulic pressure and humidity;
The water collection agencies include water-supply-pipe 10 and electromagnetic flowmeter 7, and one end of the water-supply-pipe 10 is tested for collecting The liquid of 1 bottom percolation of cylinder, the electromagnetic flowmeter 7 are connected on water-supply-pipe 10;The water collection agencies further include funnel 6, for the setting of the funnel 6 between water-supply-pipe 10 and experiment cylinder 1, the funnel 6 uses organic glass or acrylic material system At.
Further include pedestal 9, connector 15 is set on the pedestal 9, the experiment cylinder 1 is connected to by connector 15 9 top of pedestal, the water collection agencies are connected to the inside of pedestal 9 by connector 15.
The connector is arranged on the upper plate 91 of pedestal 9, and 91 middle part of upper plate is equipped with through-hole, described Connector is ring segment, and the ring segment is wholely set with upper plate, the ring segment and the experiment cylinder 1 and described Water collection agencies are connected by bolt 2, and one week in ring segment is uniformly arranged in bolt 2, and also sets up washer 3, guarantee junction Uniform force is hardly damaged.
Rubber seal 11, the company is arranged in the connector between the experiment cylinder 1 and the funnel 6 respectively The upper inside wall in connector is arranged in rubber seal 11 between fitting and experiment cylinder 1, between the connector and funnel 3 Rubber seal 11 the lower part outer wall in connector is set, prevent detection when, experiment water body leakage.
Pervious bed 5 is set inside the connector, the pervious bed 5 and the upper plate in same level, The diameter of the filter screen 4 is less than the diameter of pervious bed 5, and the filter screen 4 is arranged close to pervious bed 4, and pervious bed 4 can be to upper The soil body in side's experiment cylinder 1 is played a supporting role.
It is inserted into testing column inside soil body after the front end winding adhesive waterproof tape of the pressure sensor 12 and FDR probes 13, When preventing detection, experiment water body leakage.
The 1 top side wall of experiment cylinder is equipped with water inlet, and 1 inner wall of experiment cylinder is equipped with annular groove 16, The water inlet connects annular groove 16, injects water into annular groove 16.
The water inlet goes out to be provided with the first valve 14.
The other end of the water-supply-pipe 10 connects catch basin, and the second valve is also set up between the water-supply-pipe 10 and catch basin 8。
In apparatus of the present invention before use, overall package should be carried out first, lower hopper and pedestal lower connector are connected, connect It and lies in filter screen on pervious bed, and filter screen should be able to cover all trepannings on pervious bed completely, to there is damaged filtering Net should be replaced in time;Experiment cylinder is placed on pedestal later, after being aligned bolt hole, will be tried with the bolt with washer It tests cylinder and pedestal closely connects, you can complete the overall package of the present apparatus.
Before use, whether first check device air-tightness is good, specific implementation mode is the present invention:It assembles in a manner described After good device, the second valve on water-supply-pipe is closed, the pressure sensor for having twined adhesive waterproof tape and FDR probes are inserted into testing column In the circular hole reserved on body and stopper;Then by water inlet water filling into testing column body, water surface elevation is at least above testing column Body and pedestal connector, while the circular hole 10-20cm for being inserted with pressure sensor and probe should be also flooded completely;Observe rubber seal And whether have water exudation at circular hole, and record water surface elevation in experiment cylinder.If water surface elevation is constant after a period of time, say Bright air-tightness is good;If water surface elevation decline is more, illustrating device, there are breakthroughs, should check the rubber of pedestal or more interface Sealing ring, checks whether adhesive waterproof tape twines, and whether the devices such as probe stopper, in time the rubber seal of more aging.
After confirming that device air-tightness is good, the second valve on water-supply-pipe should be opened, the water in testing column body is discharged;Then Soil sample is packed into testing column body, when filling sample, it should be noted that do not leave a blank as possible in pressure sensor and spy pin insertion apertures neighbouring position Gap;The height about 5-10cm of water outlet should be less than by filling sample height;Pressure sensor and FDR probes are connected into reading plotter, into Row is tested in next step.
When carrying out infiltration process analogue measurement, the second valve on water-supply-pipe is first kept to open, with water supply installation by entering It supplies water into testing column body at the mouth of a river;Flow passes through water inlet outer annular groove, after annular groove is full, uniform fluid flow injection testing In cylinder;It adjusts the rate of output water of water supply installation or adjusts the second valve of water outlet so that constant head is formed in testing column body, And ensure that the head height should remain unchanged in experiment overall process, start simultaneously at t between timing1.Moisture is infiltrated from soil layer surface, and one It is observed that there is water to enter water collection agencies after the section time, and flowed out from water pipe;In this process, FDR probes can be monitored in real time Registration, obtain the soil moisture content of the position with infiltrating time t1Changing rule, that is, complete the mould to Infiltration process It is quasi-.
Continue to supply water into testing column body, observes the registration of electromagnetic flow valve;Wait for that registration stabilization fluctuates near certain numerical value When smaller, start to remember a period of time t2, in t2In period, every short period record flow valve registration q1And pressure sensor Registration p1.Find out q1And p1Average value q, p as t2Flow value in period and pressure value;It is obtained according to rule p=ρ gh Head height h, the vertical distance for measuring soil layer surface to pressure sensor with graduated scale are denoted as seepage paths l, are calculated according to cylinder internal diameter Go out cylinder cross-sectional area A.Then water percolating capacity is V=q in the t2 periods1·t2, by Darcy's law it is found that the osmotic coefficient k of sample= V·l/(A·h·t)=ql ρ g/(A·p);The infiltration rate for measuring the process simultaneously is v=kh/l=q/A.? Time t is not used in the operation of final result2, t in the calculation2It has been eliminated as intermediate quantity, therefore in actual experiment mistake Can need not also clock t in journey2, there is q multigroup enough1And p1, average value can be also found out, infiltration rate related data is obtained.
In the use of the present invention, filtering off the impurity such as the silt being mixed in water by filter screen, flowed into funnel by pervious bed; Hydraulic pressure is obtained by pressure sensor, to calculate head height, the error that artificial sensing tape comes is avoided, is all conducive to carry High experimental precision.
The present invention is during simulating Infiltration, the numerical value pair of electromagnetic flowmeter and pressure sensor and FDR probes Than combining, data are recorded, Infiltration Law is specifically understood convenient for intuitive, quickly measures soil permeability coefficient;Compared to existing dress It sets, adds the silt in the lower infiltration point of filter screen removal, test error can be reduced, improve test accuracy;Infiltration process and data Record can be carried out at the same time, and further decrease manually-operated error, and the present apparatus is readily disassembled after use, easy cleaning, To greatly facilitate the research to Infiltration process.
The present invention, can be quick by having correlation formula according to instrument and existing parameter when carrying out water infiltration simulation Soil permeability coefficient is measured, single infiltration process simulation is changed, can directly obtain effective must obtain test data.
The present invention is filtered off the silt in lower infiltration point by filter screen, can be reduced test error, be improved test accuracy.
The present invention removes water receiving operation from, and infiltration process and data record can be carried out at the same time, further decrease due to artificial Operate the error brought.
Cylinder is tested on top of the present invention, pedestal is connected with water-supply-pipe by connector, and device can be incited somebody to action using rear dismounting joint Soil sample in experiment cylinder cleans up, convenient to test next time.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations Also it should be regarded as protection scope of the present invention.

Claims (9)

1. a kind of simulating measuring device, which is characterized in that including testing cylinder, water collection agencies, pressure sensor and FDR are visited Needle;
The experiment cylinder open top, and the experiment cylinder is for accommodating soil, experiment cylinder bottom setting Filter screen;The side wall of the experiment cylinder is equipped with circular hole, the pressure sensor and FDR probes and is inserted into examination from outside by circular hole Cylinder is tested, for detecting hydraulic pressure and humidity;
The water collection agencies include water-supply-pipe and electromagnetic flowmeter, and one end of the water-supply-pipe is for collecting experiment cylinder bottom The liquid of portion's infiltration, the electromagnetic flowmeter are connected on water-supply-pipe;The water collection agencies further include funnel, and the funnel is set It sets between water-supply-pipe and experiment cylinder.
2. a kind of simulating measuring device according to claim 1, which is characterized in that further include pedestal, the pedestal Upper setting connector, the experiment cylinder are connected to pedestal top by connector, and the water collection agencies pass through connector It is connected to the inside of pedestal.
3. a kind of simulating measuring device according to claim 2, which is characterized in that the connector is arranged the bottom of at On the upper plate of seat, through-hole is equipped in the middle part of the upper plate, the connector is ring segment, the ring segment and upper bottom Plate is wholely set, and the ring segment is bolted with the experiment cylinder and the water collection agencies.
4. a kind of simulating measuring device according to claim 3, which is characterized in that the connector respectively with institute It states and rubber seal is set between experiment cylinder and the funnel.
5. a kind of simulating measuring device according to claim 2, which is characterized in that setting inside the connector Pervious bed, for the pervious bed with the upper plate in same level, the diameter of the filter screen is less than pervious bed Diameter.
6. a kind of simulating measuring device according to claim 1, which is characterized in that the pressure sensor and It is inserted into testing column inside soil body after the front end winding adhesive waterproof tape of FDR probes.
7. a kind of simulating measuring device according to claim 1, which is characterized in that the experiment cylinder upper side Wall is equipped with water inlet, and the experiment inboard wall of cylinder is equipped with annular groove, and the water inlet connects annular groove, injects water into In annular groove.
8. a kind of simulating measuring device according to claim 7, which is characterized in that the water inlet goes out to be provided with First valve.
9. a kind of simulating measuring device according to claim 1, which is characterized in that the other end of the water-supply-pipe connects Catch basin is connect, the second valve is also set up between the water-supply-pipe and catch basin.
CN201810467625.7A 2018-05-16 2018-05-16 A kind of simulating measuring device Pending CN108760599A (en)

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Application Number Priority Date Filing Date Title
CN201810467625.7A CN108760599A (en) 2018-05-16 2018-05-16 A kind of simulating measuring device

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Application Number Priority Date Filing Date Title
CN201810467625.7A CN108760599A (en) 2018-05-16 2018-05-16 A kind of simulating measuring device

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CN108760599A true CN108760599A (en) 2018-11-06

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Publication number Priority date Publication date Assignee Title
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CN107957388A (en) * 2017-10-27 2018-04-24 东南大学 Original state saturated soil and the seepage flow of conditioned soil-creep combined test device and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103235018A (en) * 2013-04-18 2013-08-07 中国地质大学(武汉) Rainwater quality monitoring and infiltration simulating comprehensive experiment instrument
CN105259090A (en) * 2015-11-04 2016-01-20 天津理工大学 Soil infiltrometer
CN105588796A (en) * 2015-12-17 2016-05-18 扬州大学 Device for accurately and rapidly determining permeability coefficient of soil
CN105911257A (en) * 2016-06-25 2016-08-31 西安科技大学 Multi-state undisturbed soil column infiltration simulation system and unsaturated osmotic coefficient determination method
CN106198341A (en) * 2016-06-25 2016-12-07 西安科技大学 Precipitation infiltration column simulation system and Unsaturated Hydraulic Conductivity assay method
CN106908368A (en) * 2017-03-14 2017-06-30 上海理工大学 Simulated rainfall earth pillar permeability intensity system
CN107957388A (en) * 2017-10-27 2018-04-24 东南大学 Original state saturated soil and the seepage flow of conditioned soil-creep combined test device and method

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窦宜 等: "《土工实验室测定技术》", 31 March 1987, 水利电力出版社 *

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