CN110346257A - A method of measuring native stone mixture infiltration process - Google Patents
A method of measuring native stone mixture infiltration process Download PDFInfo
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- CN110346257A CN110346257A CN201910408835.3A CN201910408835A CN110346257A CN 110346257 A CN110346257 A CN 110346257A CN 201910408835 A CN201910408835 A CN 201910408835A CN 110346257 A CN110346257 A CN 110346257A
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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
Abstract
The invention discloses a kind of methods for measuring native stone mixture infiltration process, include the following steps: that filter paper 1) is placed on earth pillar bottom;2) it bankets for mono- layer of the every 5cm of earth pillar, rubble, soil quality needed for calculating the native stone mixture of this layer by native stone mixing bulk density and volume before banketing;3) earth pillar is fixed on certain altitude, is supplied water by Markov bottle and carries out permeability intensity;4) wetting front transport conditions in water level and earth pillar are recorded in Markov bottle simultaneously by 1-150min by stopwatch, calculate native stone mixture infiltrating performance curve;5) native stone mixture is loaded in cutting ring by same bulk density, stone sizes and stone contents, impregnate and be saturated 24 hours into the water;6) native stone mixture saturated hydraulic conductivity is measured using constant head;The present invention can quickly and accurately obtain native stone mixture infiltrating performance using modified Kostiakov model, largely shorten time of measuring, reduce water consumption, and reduce labour cost, improve measurement efficiency, have very strong application prospect.
Description
Technical field
The present invention relates to native stone mixture infiltrating performance field of measuring technique more particularly to a kind of native stone mixture of measurement to enter
The method of infiltration process.
Background technique
Because of the influence of soil-forming process and mankind's activity, in many soil containing a certain amount of rubble (2mm < soil particle <
The component of 75mm, Soil Loss categorizing system), the presence of rubble changes soil water movement channel and the cross-section of river, increases
The bending degree in soil aperture, and then influence soil infiltration capability;Some researches show that the presence meeting of rubble is so that soil water retention is special
Property change, the Infiltration and water consumpation content and plant growth of soil are influenced, to improving arid, semiarid zone
Productivity play a significant role;Also studies have found that soil containing rubble is easily formed concentration stream, strong native stone is caused to mix
Object corrodes, and native stone mixture loss directly contributes soil fertility decline, desertification of land aggravation;Compared with soil matrix, native stone is mixed
Object is closed to produce the validity of plant amount of infiltrating water, water uptake by plant roots, the moisture evaporation of precipitation and native stone mixture moisture
Raw large effect;Therefore, to the infiltrating performance of native stone mixture, native stone mixture water characteristic, native stone mixture hydraulic conductivity
Research be constantly subjected to the wide of the domestic and international researcher in the fields such as the hydrology, ecology, field irrigation, the soil erosion and soil physics
General concern.
Currently, the measurement to native stone mixture infiltration process mostly uses traditional measurement method, such as artificial rain method, vertically
One-dimensional soil infiltrates method and double-ring infiltration instrument method etc.;Such as Chen Zihua measures native infiltrating property of stone mixture using double-ring infiltration instrument
Can, when measurement, is 4 hours a length of;Wang little Yan etc. using influence of the artificial rainfall experiment analysis stone contents to infiltrating, will test into
2 hours of row;The influence that Wang Huifang infiltrates native stone mixture using vertical one-dimensional soil infiltration research stone sizes, every group real
It tests and carries out or so 5 hours;Zhou Beibei is the influence studying stone contents and diameter and infiltrating to native stone mixture, and every group vertical
One-dimensional soil infiltrates experiment and extends to 5-8 hour.
To obtain more accurate native stone mixture infiltration process, researcher extends time of measuring as much as possible, however, compared with
Long time of measuring not only labor intensive and material resources, while can also reduce measurement efficiency;Accordingly, it is considered to conventional method need compared with
Long time measurement, higher water requirement and lower measurement efficiency seek a kind of native stone mixture infiltrating performance of accurate acquisition
Experimental method become of crucial importance.
Summary of the invention
The purpose of the invention is to overcome the deficiencies in the prior art, and native stone can rapidly and accurately be obtained by providing one kind
The experimental method of mixture infiltrating performance process can utilize the soil measured in the short time after saturated hydraulic conductivity determines
Stone mixture infiltration rate determines the parameter of modified Kostiakov Infiltration Model, then in conjunction with saturated hydraulic conductivity, with amendment
Kostiakov Infiltration Model determine complete native stone mixture infiltration process;Measurement method is to raising measurement efficiency, saving
Water consumption and reduction labour cost in measurement process are of great significance.
The parameter of native stone mixture Infiltration Model can be demarcated by primary specific infiltration curve, therefore, a calibration ginseng
Several Infiltration Models be it is corresponding with measurement is once specifically infiltrated, parameter is unrelated with the time, if selecting initial infiltration data true
Rational method shortens and surveys then it is determined that the model of parameter can predict complete native stone mixture infiltration process under this condition
Measure the time.
Wu Haijiao studies the soil of different rubble mixed ratios with Kostiakov model and modified Kostiakov model
Stone mixture infiltration rate changes over time curve, and discovery Kostiakov model and modified Kostiakov model can be preferably
Ground express the infiltration process of native stone mixture, modified Kostiakov model and measured curve more closely, related coefficient compared with
The related coefficient of Kostiakov model is more close to 1.Therefore, this research selects modified Kostiakov model quickly to calculate
Native stone mixture infiltration process.
The object of the present invention is achieved like this: a method of native stone mixture infiltration process is measured, including is walked as follows
It is rapid:
1) filter paper is placed on earth pillar bottom, avoids banketing unrestrained while forms ventilative boundary again;
2) it bankets for mono- layer of the every 5cm of earth pillar, calculates the native stone mixture of this layer by native stone mixing bulk density and volume before banketing
Soil sample after weighing is placed in earth pillar by required rubble, soil quality, then is compacted at 5cm scale;
3) earth pillar is fixed on certain altitude, is supplied water by Markov bottle and carries out permeability intensity;
4) wetting front transport conditions in water level and earth pillar are recorded in Markov bottle simultaneously by 1-150min by stopwatch, calculate native stone
Mixture infiltrating performance curve;
5) native stone mixture is loaded in cutting ring by same bulk density, stone sizes and stone contents, impregnate into the water simultaneously
Saturation 24 hours;
6) native stone mixture saturated hydraulic conductivity is measured using constant head, weighs the outflow of every 5min by electronic scale, every kind
The saturated hydraulic conductivity measurement of native stone mixture repeats three times.
The earth pillar is by diameter 29cm, and the cylinder of height 60cm forms, and bottommost is distributed the pore of 5mm, is formed saturating
Gas boundary.
The filling earth pillar height 55cm reserves head height 3cm.
The rubble is made of the rubble of two kinds of specifications, respectively diameter be 2-4mm, bulk density 2.52g/cm3It is broken
Stone and diameter be 1-2cm, bulk density 2.65g/cm3Rubble.
The filling soil is wind desiceted soil, and the soil weight is controlled in 1.2g/cm3。
The stone contents are 0,10%, 20%, 30%, 40%, and wherein stone contents 0 are control group test.
The native stone mixture infiltration process is calculated by modified Kostiakov model, and calculation formula is as follows:
I=at-b+i∞ (1)
In formula: i is native stone mixture infiltration rate, mm/h;i∞It is that stable infiltration rate can be by saturated hydraulic conductivity ksInstead of working as soil
It can be only achieved stable infiltration rate i.e. saturated hydraulic conductivity when body is fully saturated, can be obtained by traditional measurement method measurement;A, b are
Fitting parameter;
When removing stable infiltration rate in modified Kostiakov model, only remaining a, b value it needs to be determined that;Accordingly, it is determined that
After two data points in equation can determine that two unknown parameters, unknown parameter determine, it can calculate completely to enter with the model
Infiltration process.Parameter value can be determined by formula (2), (3);
im-i∞=atm -b (2)
in-i∞=atn -b (3)
In formula, imIt is the native stone stabilized with mixture infiltration rate of initial time m, inIt is the infiltration rate of initial time n.
A, the parameter value of b, as the saturated hydraulic conductivity k of native stone mixture is calculatedsIt is modified and after a, b value determine
Kostiakov model can calculate the infiltration rate of different moments.
It is that the present invention generates the utility model has the advantages that the invention discloses a kind of method for measuring native stone mixture infiltration process, benefit
Native stone mixture infiltrating performance can be quickly and accurately obtained with modified Kostiakov model, largely shortens measurement
Time reduces water consumption, and reduces labour cost, improves measurement efficiency, has very strong application prospect.
Detailed description of the invention
Fig. 1 is the calculated value and measured value comparison diagram that control group tests native stone mixture infiltration rate.
Native stone mixture infiltration rate calculated value and the measured value comparison that Fig. 2 is stone sizes 2-4mm, stone contents are 10%
Figure.
Native stone mixture infiltration rate calculated value and the measured value comparison that Fig. 3 is stone sizes 2-4mm, stone contents are 20%
Figure.
Native stone mixture infiltration rate calculated value and the measured value comparison that Fig. 4 is stone sizes 2-4mm, stone contents are 30%
Figure.
Native stone mixture infiltration rate calculated value and the measured value comparison that Fig. 5 is stone sizes 2-4mm, stone contents are 40%
Figure.
Native stone mixture infiltration rate calculated value and the measured value comparison that Fig. 6 is stone sizes 1-2cm, stone contents are 10%
Figure.
Native stone mixture infiltration rate calculated value and the measured value comparison that Fig. 7 is stone sizes 1-2cm, stone contents are 20%
Figure.
Native stone mixture infiltration rate calculated value and the measured value comparison that Fig. 8 is stone sizes 1-2cm, stone contents are 30%
Figure.
Native stone mixture infiltration rate calculated value and the measured value comparison that Fig. 9 is stone sizes 1-2cm, stone contents are 40%
Figure.
Figure 10 is control group in 0-30min period infiltration rate measured value and calculated value comparison diagram.
Figure 11 is control group in 30-150min period infiltration rate measured value and calculated value comparison diagram.
Figure 12 is the native stone mixture of stone sizes 2-4mm, stone contents 10% in 0-30min period infiltration rate measured value
With calculated value comparison diagram.
Figure 13 is the native stone mixture 30-150min period infiltration rate measured value of stone sizes 2-4mm, stone contents 10%
With calculated value comparison diagram.
Figure 14 is the native stone mixture of stone sizes 2-4mm, stone contents 20% in 0-30min period infiltration rate measured value
With calculated value comparison diagram.
Figure 15 is stone sizes 2-4mm, the native stone mixture of stone contents 20% is measured in 30-150min period infiltration rate
Value and calculated value comparison diagram.
Figure 16 is the native stone mixture of stone sizes 2-4mm, stone contents 30% in 0-30min period infiltration rate measured value
With calculated value comparison diagram.
Figure 17 is stone sizes 2-4mm, the native stone mixture of stone contents 30% is measured in 30-150min period infiltration rate
Value and calculated value comparison diagram.
Figure 18 is the native stone mixture of stone sizes 2-4mm, stone contents 40% in 0-30min period infiltration rate measured value
With calculated value comparison diagram.
Figure 19 is stone sizes 2-4mm, the native stone mixture of stone contents 40% is measured in 30-150min period infiltration rate
Value and calculated value comparison diagram.
Figure 20 is the native stone mixture of stone sizes 1-2cm, stone contents 10% in 0-30min period infiltration rate measured value
With calculated value comparison diagram.
Figure 21 is stone sizes 1-2cm, the native stone mixture of stone contents 10% is measured in 30-150min period infiltration rate
Value and calculated value comparison diagram.
Figure 22 is the native stone mixture of stone sizes 1-2cm, stone contents 20% in 0-30min period infiltration rate measured value
With calculated value comparison diagram.
Figure 23 is stone sizes 1-2cm, the native stone mixture of stone contents 20% is measured in 30-150min period infiltration rate
Value and calculated value comparison diagram.
Figure 24 is the native stone mixture of stone sizes 1-2cm, stone contents 30% in 0-30min period infiltration rate measured value
With calculated value comparison diagram.
Figure 25 is stone sizes 1-2cm, the native stone mixture of stone contents 30% is measured in 30-150min period infiltration rate
Value and calculated value comparison diagram.
Figure 26 is the native stone mixture of stone sizes 1-2cm, stone contents 40% in 0-30min period infiltration rate measured value
With calculated value comparison diagram.
Figure 27 is stone sizes 1-2cm, the native stone mixture of stone contents 40% is measured in 30-150min period infiltration rate
Value and calculated value comparison diagram.
Figure 28, which reaches to stablize for the native stone mixture of stone sizes 2-4mm, infiltrates required time figure.
Figure 29, which reaches to stablize for the native stone mixture of stone sizes 1-2cm, infiltrates required time figure.
Specific embodiment
Embodiment of the present invention is elaborated further with reference to the accompanying drawings and examples.
1) by filter paper be placed on bottom most portion be furnished with 5mm pore, diameter 29cm, highly be 60cm cylindrical earth pillar bottom
Portion avoids banketing unrestrained while forming ventilative boundary again;
2) it bankets for mono- layer of the every 5cm of earth pillar, calculates the native stone mixture of this layer by native stone mixing bulk density and volume before banketing
Soil sample after weighing is placed in earth pillar by required rubble, soil quality, then is compacted at 5cm scale, wherein loading soil is
Wind desiceted soil, rubble are made of the rubble of two kinds of specifications, respectively diameter be 2-4mm, bulk density 2.52g/cm3Rubble and diameter
For 1-2cm, bulk density 2.65g/cm3Rubble;
3) earth pillar will be loaded to be fixed in 55cm height, reserves head height 3cm, carry out infiltrating examination by Markov bottle water supply
It tests;
4) wetting front transport conditions in water level and earth pillar are recorded in Markov bottle simultaneously by 1-150min by stopwatch, calculate native stone
Mixture infiltrating performance curve;
5) native stone mixture is loaded in cutting ring by same bulk density, stone sizes and stone contents, impregnate into the water simultaneously
Saturation 24 hours, the soil weight are controlled in 1.2g/cm3, stone sizes are 2-4mm and 1-2cm, stone contents 0,10%,
20%, 30%, 40%, wherein stone contents 0 are control group test;
6) native stone mixture saturated hydraulic conductivity is measured using constant head, weighs the outflow of every 5min by electronic scale, every kind
The saturated hydraulic conductivity measurement of native stone mixture repeats three times.
Native stone mixture infiltration process is calculated by modified Kostiakov model, and calculation formula is as follows:
I=at-b+i∞ (1)
In formula: i is native stone mixture infiltration rate, mm/h;i∞It is that stable infiltration rate can be by saturated hydraulic conductivity ksInstead of working as soil
It can be only achieved stable infiltration rate i.e. saturated hydraulic conductivity when body is fully saturated, can be obtained by traditional measurement method measurement;A, b are
Fitting parameter;
When removing stable infiltration rate in modified Kostiakov model, only remaining a, b value it needs to be determined that;Accordingly, it is determined that
After two data points in equation can determine that two unknown parameters, unknown parameter determine, it can calculate completely to enter with the model
Infiltration process.Parameter value can be determined by formula (2), (3);
im-i∞=atm -b (2)
in-i∞=atn -b (3)
In formula, imIt is the native stone stabilized with mixture infiltration rate of initial time m, inIt is the infiltration rate of initial time n.
A, the parameter value of b, as the saturated hydraulic conductivity k of native stone mixture is calculatedsIt is modified and after a, b value determine
Kostiakov model can calculate the infiltration rate of different moments.
The saturated hydraulic conductivity measurement result of different stone contents soil stone mixtures is shown in Table 1.
The different stone contents soil stone mixture saturated hydraulic conductivity measurement results of table 1
The native stone mixture saturated hydraulic conductivity deviation of different bulk density, different stone contents and stone sizes is respectively less than in table 1
0.2mm/h, therefore, the measurement of saturated hydraulic conductivity accuracy with higher and accuracy.It is led according to without rubble soil saturation
Water rate and the calculated result of different-diameter soil stone mixture are shown: the saturated hydraulic conductivity without gravelly soil stone mixture is maximum;Contain
For the saturated hydraulic conductivity of gravelly soil stone mixture with the increase of stone contents, saturated hydraulic conductivity is in reduction trend;Stone sizes are got over
Greatly, saturated hydraulic conductivity is smaller.
Native stone mixture infiltration rate is calculated by formula (4),
In formula, Δ t is the interval time for recording water level, min;Δ Q is Markov bottle water supply in the Δ t period, cm3;A be into
Area is seeped, that is, tests the cross-sectional area of earth pillar, cm2。
The a in infiltration rate calculating parameter (2) and (3) formula when choosing initial point 2,5,11min, b value, calculated result such as table
Shown in 2 and 3.
The a in modified Kostiakov model that 2 control group of table calculates, b value
The native stone mixture of table 3 is fitted a in modified Kostiakov model, b value
When the saturated hydraulic conductivity and a of native stone mixture, after b value determines, modified Kostiakov model can be calculated
The infiltration rate of different moments.
Fig. 1-9 shows that the infiltration rate measured value of each experiment condition and calculated value are very close, and control group tests proportionality coefficient
0.9659-0.9760, related coefficient 0.9781-0.9830;Stone sizes 2-4mm proportionality coefficient 0.9133-1.0095, phase relation
Number 0.9186-0.9949;Stone sizes 1-2cm proportionality coefficient 0.9371-1.0191, related coefficient 0.9028-0.9972.To sum up
The measured value and calculated value related coefficient of control group and the mixture of stone containing gravelly soil are all larger than 0.9, and related coefficient is all larger than 0.9.
The method for the quick infiltrating performance for determining native stone mixture that calculated result shows newly to propose can be according to the infiltration rate of preceding 11min very
Complete infiltrating performance curve is calculated well.
In order to further verify quick calculation method, the infiltration rate measured value and calculated value point of 0-30min and 30-150min
It does not compare, proportionality coefficient and related coefficient are listed in table 4,5.
4 control group of table tests the proportionality coefficient and related coefficient between the measured value and calculated value of different periods infiltration rate
Proportionality coefficient and related coefficient between the measured value and calculated value of 5 different periods soil stone mixture infiltration rate of table
Figure 10-11 is that control group tests different periods infiltration rate measured value and calculated value comparison diagram, and Figure 12-18 is that rubble is straight
For the native stone mixture of diameter 2-4 mm in different periods infiltration rate measured value and calculated value comparison diagram, Figure 19-27 is stone sizes 1-
The native stone mixture of 2cm is in different periods measured value and calculated value comparison diagram, and table 4-5 is shown under each experimental status, different periods
Proportionality coefficient and related coefficient between the measured value and calculated value of native stone mixture infiltration rate, when stone contents 0,0-
30min proportionality coefficient 0.9864-1.0030, related coefficient 0.9826-0.9845;30-150min proportionality coefficient 0.8242-
0.8701, related coefficient 0.8773-0.8933.The related coefficient of preceding 30min is all larger than 0.98, and the phase between 30-150min
Relationship number illustrates that test infiltration rate in preceding 30min is very fast, infiltrates after carrying out 30min, infiltration rate between 0.87-0.9
It reduces, slowly, measured value slowly reduces in continuous for variation.
As 2-4mm containing stone sizes in native stone mixture, 0-30min proportionality coefficient 0.9328-0.9996, related coefficient
0.8715-0.9970;30-150min proportionality coefficient 0.8969-1.1884, related coefficient 0.5017-0.9775.
When native stone mixture when containing 1-2cm, 0-30min proportionality coefficient 0.9088-1.0304, related coefficient 0.9357-
0.9809,30-150min proportionality coefficient 0.8427-1.1733, related coefficient 0.5987-0.9494.
The fit solution of native stone mixture is poor compared with gravelly soil earth fit solution is free of, and native stone mixture infiltration rate exists
It is not consecutive variations after 30min, is reduced in interim, and calculated value is continuously to reduce.The small fit solution of stone sizes is got over
Good, reason is that 2-4mm rubble can change soil aperture situation inside soil, makes the anti-extrusion ability enhancing of soil, it is easier to
Macrovoid is formed, for infiltration rate in slowly reducing, measured value is in continuously slowly to reduce on the whole;Diameter 1-2cm rubble is embedded in soil
The soil cross-section of river can be reduced in earth, increase hole bending degree, make moisture movement channel winding complex, infiltration rate is in 30-
150min is in reduction trend on the whole, but fluctuation is larger, and fitting effect is relatively poor compared with 2-4mm rubble.
Show that native stone mixture infiltration rate reaches final when transient state infiltration rate process goes to zero according to formula (2), (3)
Stable state does not change over time, and when the time, t tended to infinity, instantaneous infiltration rate goes to zero, and it is i.e. native that i reaches final infiltration rate
Stone mixture saturated hydraulic conductivity, the increase at any time of the rate of decay of transient state infiltration rate and reduce, become infiltrating latter half
It is smaller, it can be expressed by formula (6) according to formula (5) transient portion thereof,
atj -b=ij-ks≤1 (5)
tj -b≤1/a (6)
The a that a in formula, b value are calculated using different time points in table 3, the average value of b value.
The native stone mixture that Figure 28 and Figure 29 respectively indicates stone sizes 2-4mm and stone sizes 1-2cm, which reaches to stablize, to be entered
The time required to seeping, as time increases, the rate of decay of transient state infiltration rate is gradually reduced, and is become more infiltrating latter half
It is small.Stone contents, which reach more greatly, stablizes that infiltrate the time shorter;Ballast grain sizes are smaller to be reached and stablizes that infiltrate the time shorter.It is computed,
Native stone mixture, which reaches to stablize, to be infiltrated time needs 5 days or more.
Really native stone stabilized with mixture infiltration rate is obtained according to actual measurement to take a long time, and increases actual measurement
Difficulty.Native stone mixture infiltrating performance can be quickly and accurately obtained using modified Kostiakov model, largely
Shorten time of measuring, reduce water consumption, reduce labour cost, improve measurement efficiency, there is very strong application prospect.
Claims (7)
1. a kind of method for measuring native stone mixture infiltration process, characterized by the following steps:
1) filter paper is placed on earth pillar bottom, avoids banketing unrestrained while forms ventilative boundary again;
2) it bankets for mono- layer of the every 5cm of earth pillar, is calculated needed for the native stone mixture of this layer before banketing by native stone mixing bulk density and volume
Soil sample after weighing is placed in earth pillar by rubble, soil quality, then is compacted at 5cm scale;
3) earth pillar is fixed on certain altitude, is supplied water by Markov bottle and carries out permeability intensity;
4) wetting front transport conditions in water level and earth pillar are recorded in Markov bottle simultaneously by 1-150min by stopwatch, calculate native stone mixing
Object infiltrating performance curve;
5) native stone mixture is loaded in cutting ring by same bulk density, stone sizes and stone contents, impregnate and be saturated into the water
24 hours;
6) native stone mixture saturated hydraulic conductivity is measured using constant head, the outflow of every 5min, every kind of native stone is weighed by electronic scale
The saturated hydraulic conductivity measurement of mixture repeats three times.
2. a kind of method for measuring native stone mixture infiltration process as described in claim 1, it is characterised in that: the earth pillar
It is by diameter 29cm, the cylinder of height 60cm forms, and bottommost is distributed the pore of 5mm, forms ventilative boundary.
3. a kind of method for measuring native stone mixture infiltration process as described in claim 1, it is characterised in that: the filling
Earth pillar height 55cm reserves head height 3cm.
4. a kind of method for measuring native stone mixture infiltration process as described in claim 1, it is characterised in that: the rubble
Be made of the rubble of two kinds of specifications, respectively diameter be 2-4mm, bulk density 2.52g/cm3Rubble and diameter be 1-2cm, hold
Weight is 2.65g/cm3Rubble.
5. a kind of method for measuring native stone mixture infiltration process as described in claim 1, it is characterised in that: the filling
Soil is wind desiceted soil, and the soil weight is controlled in 1.2g/cm3。
6. a kind of method for measuring native stone mixture infiltration process as described in claim 1, it is characterised in that: the rubble
Content is 0,10%, 20%, 30%, 40%, and wherein stone contents 0 are control group test.
7. a kind of method for measuring native stone mixture infiltration process as described in claim 1, it is characterised in that: the native stone
Mixture infiltration process is calculated by modified Kostiakov model, and calculation formula is as follows:
I=at-b+i∞ (1)
In formula: i is native stone mixture infiltration rate, mm/h;i∞It is that stable infiltration rate can be by saturated hydraulic conductivity ksInstead of when the soil body is complete
It can be only achieved stable infiltration rate i.e. saturated hydraulic conductivity when full saturation, can be obtained by traditional measurement method measurement;A, b are fittings
Parameter;
When removing stable infiltration rate in modified Kostiakov model, only remaining a, b value it needs to be determined that;Accordingly, it is determined that equation
In two data points can determine two unknown parameters, after unknown parameter determines, can be calculated with the model and completely be infiltrated
Journey.Parameter value can be determined by formula (2), (3);
im-i∞=atm -b (2)
in-i∞=atn -b (3)
In formula, imIt is the native stone stabilized with mixture infiltration rate of initial time m, inIt is the infiltration rate of initial time n.
A, the parameter value of b, as the saturated hydraulic conductivity k of native stone mixture is calculatedsIt is modified and after a, b value determine
Kostiakov model can calculate the infiltration rate of different moments.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115078225A (en) * | 2022-08-22 | 2022-09-20 | 黑龙江省水利水电勘测设计研究院 | In-situ infiltration testing system and testing method thereof |
CN115078225B (en) * | 2022-08-22 | 2022-11-15 | 黑龙江省水利水电勘测设计研究院 | In-situ infiltration testing system and testing method thereof |
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