CN106596372B - The two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index - Google Patents
The two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index Download PDFInfo
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- 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
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Abstract
The present invention discloses the two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index, it is formed by the double column run model that two-tube China and foreign countries' tube method determines the aquiclude coefficient of consolidation and deformation hysteresis index at the scene first, based on double column run model, deriving reduces a certain constant in inner tube head, and outer tube aquiclude cylinder side keeps the settling amount Formula Parsing solution of underground water invariant position condition lower outer pipe aquiclude；Secondly according to the experimental data that aquiclude settling amount changes over time in the outer tube based on the dial gauge measurement arranged in outer tube aquiclude, the aquiclude coefficient of consolidation and deformation hysteresis index are determined using herbal combination.The invention has the following advantages that the analytic solutions pushed away are theoretical tight；Realize the in-situ test of the aquiclude coefficient of consolidation and deformation hysteresis index, experimental rig and test process are simple, easy to operate；Leaky system rate, the coefficient of consolidation, deformation hysteresis index, the coefficient of conductivity and infiltration coefficient can be acquired simultaneously, and the parameter of acquisition is more.
Description
Technical field
The present invention relates to a kind of two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index, especially
It is a kind of scene determining leaky system rate, the method for the coefficient of conductivity and infiltration coefficient.
Background technique
Aquifer System seepage and deformation is the most immediate cause for causing regional surface subsidence.Surface subsidence is a kind of ground
The environmental geology phenomenon that absolute altitude slowly reduces is a kind of not compensable permanent environment and resources loss, can develop when serious
For geological disaster.From hydrogeologic aspect, deep covering layer is exactly aquifer System the most typical.For example, China is long
River delta deep covering layer is exactly the aquifer System being made of three artesian aquifers and four aquicludes, and thickness reaches
50~200m.In Yangtze River Delta, area of the surface subsidence due to caused by groundwater mining greater than 200mm has accounted for region area
1/10th, wherein cumulative maximum settling amount reach 2.80m, the economic loss having resulted in is up to 50,000,000,000 dollars.
For being saturated seepage flow-problem on deformation of aquiclude, research saturation aquiclude percolation law and change respectively in the past
The achievement of shape rule is more, and the achievement for studying saturation aquiclude seepage―deformation coupling relationship simultaneously recently is quite a few.But these
Achievement is nearly all research seepage flow-deformation relationship on the basis of existing seepage flow-Deformation control equation；It is not with suspicion these
Between the associated parameter of governing equation with the presence or absence of problem either without discovery there are the problem of.However many problems are still tired
Disturb us: although 1. the coefficient of consolidation in the coefficient of conductivity and consolidation equation in osmotic control equation should belong to together in form
One parameter, but the conduction that field hydrogeology test obtains is rarely employed in our regulation, specification or in real work
Coefficient replaces coefficient of consolidation calculating soil deformation or replaces the coefficient of conductivity to calculate infiltration using the coefficient of consolidation that consolidation test obtains
Flow problem, reason are that the two always has bigger difference.2. saturation aquiclude exists in terms of seepage flow and consolidation governing equation form
Occur seepage flow-deformation process should be it is synchronous, actually it is found that deformation lag behind seepage flow always.3. based on existing
Seepage flow-consolidation model prediction calculates the deformation of soil body sedimentation, is difficult to match with actual observation result, often calculated value is all different
Degree is bigger than normal.
Summary of the invention
Goal of the invention: to overcome the shortcomings of the existing technology, the present invention is based on the two-tube in-situ testing techniques that drills, according to weak permeable
Layer cylinder side head reduces aquiclude settling amount Formula Parsing solution under the conditions of a certain constant, proposes that a kind of determination in situ is weak
The two-tube outer tube method of the water layer coefficient of consolidation and deformation hysteresis index.
Technical solution: in order to solve the above technical problems, the present invention adopts the following technical scheme:
The in situ two-tube outer tube method for determining the aquiclude coefficient of consolidation and deformation hysteresis index, it is characterised in that: including with
Lower step:
1) it, is formed by two-tube China and foreign countries' tube method at the scene and determines the two-tube of the aquiclude coefficient of consolidation and deformation hysteresis index
Test model is based on double column run model, and deriving reduces a certain constant in inner tube head, and outer tube aquiclude cylinder side is protected
Hold the settling amount Formula Parsing solution of level of ground water permanence condition lower outer pipe aquiclude；
2), at any time according to aquiclude settling amount in the outer tube based on the dial gauge measurement arranged in outer tube aquiclude
The experimental data of variation determines the aquiclude coefficient of consolidation and deformation hysteresis index using herbal combination.
Working principle: experimental provision and experimentation of the present invention are simple, easy to operate, and analytic solutions are theoretical tight, using wiring
Method determines that parameter, method are simply easily grasped, and can solve current scene can not determine the weak permeable coefficient of consolidation in situ and deform stagnant
The key technical problem of index afterwards overcomes the error tested after field sampling in laboratory；Meanwhile primary experiment can be with
Leaky system rate, the coefficient of consolidation, deformation hysteresis index, the coefficient of conductivity and infiltration coefficient are acquired simultaneously, the parameter of acquisition is more.
Most importantly, the weak permeable coefficient of consolidation and deformation hysteresis index are determined the method achieve in situ, therefore, this method has very
Good application value.
It is preferred that the water level of inner tube head is not less than aquiclude top surface.
The implementation method of the double column run model the following steps are included:
1) it, drills at the scene to the top surface for needing aquiclude to be tested, while by outer tube down toward the top surface of aquiclude
And the soil sample in outer tube more than aquiclude top surface is taken out into drilling；
2), outer tube is depressed into the bottom surface of aquiclude using drilling machine pressure from the top surface of aquiclude；
3) it, is put into inner tube in outer tube hub, equally, will be placed under inner tube to the top surface of aquiclude；
4) it, is pressed into drilling machine pressure drop inner tube to the examination section bottom for needing aquiclude to be tested, and the side by inhaling mud
Aquiclude soil sample in inner tube is sucked out formula；
5) gravel, is set as loaded filter in inner tube middle berth, and right in the circular ring shape casing formed between outer tube and inner tube
Gravel should be laid with as loaded filter in the examination section top position of aquiclude；It is formed by two-tube China and foreign countries' tube method and determines aquiclude
The double column run model of the coefficient of consolidation and deformation hysteresis index.
Ensure that water level is consistent with the outer level of ground water that drills in circular ring shape casing and inner tube；In circular ring shape casing middle and upper part port
Position is arranged Ma Liaote bottles, and Ma Liaote bottles of water inlet pipe lower end is placed at level of ground water elevation, makes water in circular ring shape casing
Position keeps determining water level；The pump line that draws water is arranged in inner tube, and suction pump bottom of the tube is placed between level of ground water and examination section top surface,
After test is ready to complete, suction pump is instantaneously opened, makes the water-head that water level generates in inner tube, and keeps the head difference of inner and outer pipes solid
It is fixed constant.
It is above-mentioned to determine water level for level of ground water.
Arrange that settlement observation system, the settlement observation system include sequentially connecting from top to bottom in circular ring shape casing
Dial gauge, rigid rod and pedestal；Pedestal is organic glass plectane, and gathered permeable hole thereon, and the reading of dial gauge reflects pedestal
The settling amount of following soil layer；After test is ready to complete, suction pump is opened, so that water level in inner tube is generated water-head, and in holding
The head difference of outer tube immobilizes, and records the settling amount that the dial gauge arranged in circular ring shape casing is recorded and change over time.
Based on double column run model, deriving reduces a certain constant not less than the head of aquiclude top surface in inner tube water level,
And outer tube aquiclude cylinder side keeps the settling amount Formula Parsing solution of underground water invariant position condition lower outer pipe aquiclude；So
Afterwards according to based on arranged in circular ring shape casing aquiclude dial gauge measurement circular ring shape casing in aquiclude settling amount with
The experimental data of time change determines the aquiclude coefficient of consolidation and deformation hysteresis index using herbal combination.
The reality that aquiclude settling amount changes over time in inner tube based on the dial gauge measurement arranged in circular ring shape casing
Certification of registered capital material, determines the aquiclude coefficient of consolidation and deformation hysteresis index using herbal combination, i.e., will survey in the circular ring shape casing of record
The variation of settling amount S t at any time make S (t)~t measured curve in the log-log coordinate system with standard curve identical molds,
With S~t standard curve wiring, make two curve overlappings, an optional match point writes down corresponding coordinate value[S]、With
[t] substitutes into respective formula and calculates aquiclude coefficient of consolidation CvWith deformation hysteresis index τv0。
The unmentioned technology of the present invention is the prior art.
The utility model has the advantages that compared with prior art, the determining aquiclude coefficient of consolidation and deformation hysteresis provided by the present invention
The method of index has the advantage that
1. the analytic solutions pushed away, theoretical tight, because the method has stringent theoretical foundation；
2. realizing the in-situ test of the aquiclude coefficient of consolidation and deformation hysteresis index, and experimental rig and test process
Simply, easy to operate；
3. determining that parameter, method are simply easily grasped using herbal combination；
4. primary experiment can acquire simultaneously leaky system rate, the coefficient of consolidation, deformation hysteresis index, the coefficient of conductivity and
The parameter of infiltration coefficient, acquisition is more, and this method has good application value.
Detailed description of the invention
Fig. 1 is the flow chart of the embodiment of the present invention；
Fig. 2 is the double column run model of the embodiment of the present invention；
Fig. 3 is the present inventionStandard curve；
Fig. 4 is the settlement calculation value and observation matched curve of the embodiment of the present invention；
In figure: 1 is outer tube, and 2 be inner tube, and 3 be Ma Liaote bottles, and 4 be dial gauge, and 5 be rigid rod, and 6 be pedestal, and 7 be filter
Layer, 8 be examination section, and 9 be suction pump.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
The two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index, comprising the following steps:
1) it, is formed by two-tube China and foreign countries' tube method at the scene and determines the two-tube of the aquiclude coefficient of consolidation and deformation hysteresis index
Test model is based on double column run model, and deriving reduces a certain constant in inner tube head, and outer tube aquiclude cylinder side is protected
Hold the settling amount Formula Parsing solution of level of ground water permanence condition lower outer pipe aquiclude；The water level of inner tube head is not less than weak permeable
Layer top surface；
2), at any time according to aquiclude settling amount in the outer tube based on the dial gauge measurement arranged in outer tube aquiclude
The experimental data of variation determines the aquiclude coefficient of consolidation and deformation hysteresis index using herbal combination.
The implementation method of double column run model the following steps are included:
1) it, drills at the scene to the top surface for needing aquiclude to be tested, while by outer tube that diameter is 127mm down toward weak
The soil sample in outer tube more than aquiclude top surface is simultaneously taken out into drilling in the top surface of pervious bed；
2), outer tube is depressed into the bottom surface of aquiclude using drilling machine pressure from the top surface of aquiclude；
3) it, is put into the PVC inner tube that diameter is 75mm in outer tube hub, equally, will be placed under PVC inner tube to aquiclude
Top surface；
4) it, is pressed into drilling machine pressure drop PVC inner tube to the examination section bottom for needing aquiclude to be tested, and by inhaling mud
Aquiclude soil sample in PVC inner tube is sucked out mode；
5) gravel, is laid in PVC inner tube as loaded filter, and in the circular ring shape casing formed between outer tube and inner tube
Examination section top position corresponding to aquiclude is laid with gravel as loaded filter；Be formed by two-tube China and foreign countries' tube method determine it is weak permeable
The double column run model of the layer coefficient of consolidation and deformation hysteresis index.
Ensure that water level is consistent with the outer level of ground water that drills in circular ring shape casing and PVC inner tube；In circular ring shape casing middle and upper part
Port position is arranged Ma Liaote bottles, and Ma Liaote bottles of water inlet pipe lower end is placed at level of ground water elevation, makes circular ring shape casing
Water level is determined in interior water level holding；The pump line that draws water is arranged in PVC inner tube, and suction pump bottom of the tube is placed into level of ground water and examination section top surface
Between, after test is ready to complete, suction pump is instantaneously opened, makes the water-head that water level generates in PVC inner tube, and keep inner and outer pipes
Head difference immobilize.
Arrange that settlement observation system, the settlement observation system include sequentially connecting from top to bottom in circular ring shape casing
Dial gauge, rigid rod and pedestal；Pedestal is organic glass plectane, and gathered permeable hole thereon, and the reading of dial gauge reflects pedestal
The settling amount of following soil layer；After test is ready to complete, suction pump is opened, so that water level in PVC inner tube is generated water-head, and keep
The head difference of inner and outer pipes immobilizes, and records the settling amount that the dial gauge arranged in circular ring shape casing is recorded and become at any time
Change.
Based on double column run model, deriving reduces a certain constant not less than the head of aquiclude top surface in inner tube water level,
And outer tube aquiclude cylinder side keeps the settling amount Formula Parsing solution of underground water invariant position condition lower outer pipe aquiclude；So
Afterwards according to based on arranged in circular ring shape casing aquiclude dial gauge measurement circular ring shape casing in aquiclude settling amount with
The experimental data of time change determines the aquiclude coefficient of consolidation and deformation hysteresis index using herbal combination.
The reality that aquiclude settling amount changes over time in inner tube based on the dial gauge measurement arranged in circular ring shape casing
Certification of registered capital material, determines the aquiclude coefficient of consolidation and deformation hysteresis index using herbal combination, i.e., will survey in the circular ring shape casing of record
The variation of settling amount S t at any time make S (t)~t measured curve in the log-log coordinate system with standard curve identical molds,
WithStandard curve wiring, makes two curve overlappings, and an optional match point writes down corresponding coordinate value[S]、
[t] substitutes into respective formula and calculates aquiclude coefficient of consolidation CvWith deformation hysteresis index τv0。
The principle that aquiclude parameter determines:
1) analytic solutions of aquiclude distorted pattern are saturated:
Herein, consider saturation aquiclude cylinder saturation pressure-bearing and pressure head is equal everywhere, be saturated aquiclude column
Head reduces certain certain value on the downside of bodyAnd it is constant to be saturated water level on the upside of aquiclude；At this moment saturation aquiclude is vertical flow,
Being saturated aquiclude strain model is
In formula: cvFor the saturated soft soil coefficient of consolidation；εvFor the unit volume deformation values of saturated soft soil；For water on the downside of cylinder
Potential drop is deep；L is saturated soft soil thickness；mvFor the coefficient of bulk compressibility of saturated soft soil；ρwFor the density of water；G is acceleration of gravity；z
For coordinate in z-axis；T is the time.
Saturated soft soil flow model in porous media I must be solved through variables separation and Fourier transform are as follows:
In formula: n is natural number；E is natural constant.
2) analytic solutions of saturation aquiclude sedimentation:
If t moment unit level area is saturated cumulative volume deflection in aquiclude whole thickness are as follows:
In formula: L is examination segment length；M is natural number.
There are saturation aquiclude strain model and formulaThe profile variation (sedimentation) actually occurred
Amount be
S (t)=(1-n) DV (t)
In formula: μsTo be saturated leaky system rate.
As t=τv0Or when t → ∞, saturation aquiclude sedimentation tends towards stability, and is saturated in aquiclude whole thickness and deforms
Amount reaches maximum value
Dimensionless processing:
Wherein,For dimensionless drawdown；AndFor dimensionless position and time；For with it is full
With aquiclude property with thickness related parameter, referred to as deformation hysteresis index.Deformation hysteresis indicial response saturation aquiclude
Deform the lag time responded to boundary SEA LEVEL VARIATION.
WithVariation relation curve such as Fig. 3 standard curve.
In addition, there is formulaSame available formula (6), it may be assumed that
By formulaIt substitutes into, it is noted that with admittedly
Clone number CvInstead of coefficient of conductivity a.
In formula: q is the flow that t moment passes through position z unit level area；K is saturation aquiclude infiltration coefficient；U is
It is saturated the SEA LEVEL VARIATION value of aquiclude z point t moment.
Then:
It willSubstitute into above formula to get
3) parameter determination method
ForMoment aquiclude settling amount:
And
Logarithm is taken simultaneously to above-mentioned two formula both sides, is had
(9), the Section 2 on the right of (10) two formulas is all constant, therefore in log-log coordinate system, tests the S (t) of acquisition
~t andStandard curve (Fig. 3) is identical, only coordinate translation S in length and breadth in shape∞WithUsing herbal combination,
Two curves are overlapped, an optional match point writes down corresponding coordinate value[S]、[t], substitute into above-mentioned (7), (5),
(8) formula obtains
Release water rate:
The coefficient of consolidation:
The coefficient of conductivity:
Infiltration coefficient: K=μsa
Specific test procedure:
(1) firstly, drilling at the scene to the top surface for needing aquiclude to be tested, while the outer tube for being 127mm by diameter
Down toward aquiclude top surface and by outer tube more than aquiclude top surface soil sample take out drilling, then using drilling machine pressure will
Outer tube is depressed into the bottom surface of aquiclude from the top surface of aquiclude, is then put into the PVC inner tube that diameter is 75mm in outer tube hub,
Equally, it will be placed under PVC inner tube to the top surface of aquiclude, be then pressed into again with drilling machine pressure drop PVC inner tube to needing to test
Aquiclude examination section bottom, and by way of inhaling mud by inner tube aquiclude soil sample be sucked out, then in inner tube
Gravel is laid with as loaded filter, and is laid with gravel as loaded filter corresponding to the examination section top position of aquiclude in outer tube；
The two-tube examination that the aquiclude coefficient of consolidation and deformation hysteresis index are determined using two-tube China and foreign countries' tube method is thus formd at the scene
Test model.
(2) ensure that water level is consistent with the outer level of ground water that drills in circular ring shape casing and PVC inner tube；On in circular ring shape casing
Portion's port position is arranged Ma Liaote bottles, and Ma Liaote bottles of water inlet pipe lower end is placed at level of ground water elevation, makes circular ring shape set
Water level (level of ground water) is determined in water level holding in managing；The pump line that draws water is arranged in PVC inner tube, and suction pump bottom of the tube is placed into underground water
Or less a distance (examination section top surface or more).
(3) after test is ready to complete, suction pump is instantaneously opened, so that water level in inner tube is generated water-head, and inside and outside holding
The head difference of pipe immobilizes.Settlement observation system is arranged in outer tube, is made of dial gauge, rigid rod, pedestal etc..Instrument peace
It at the top of device, is connected on chassis by rigid rod, pedestal is organic glass plectane, and gathered permeable hole thereon, instrument
Reading reflection the following soil layer of pedestal settling amount.After test is ready to complete, suction pump is opened, water level in inner tube is made to generate water
Potential difference, and the head difference of inner and outer pipes is kept to immobilize, and record settling amount that the dial gauge arranged in inner tube is recorded at any time
Between change.
(4) record: dial gauge settle discharge observation time, preferably the 1st after opening suction pump, 2,3,4,6,8,10,15,
20,25,30,40,50,60,80,100,120min clock is respectively observed once, is recorded in table, can be observed later every 30min clock
Once.
(5) lasting observation, until be basically unchanged every 30min dial gauge settling amount, it can termination test.
(6) parameter calculates: by the variation of the settling amount S measured in the inner tube of record t at any time identical as standard curve
Make S (t)~t measured curve in the log-log coordinate system of mould, withStandard curve wiring is overlapped two curves, and optional one
Match point writes down corresponding coordinate value[S]、[t] substitutes into respective formula and calculates aquiclude coefficient of consolidation CvWith
Deformation hysteresis index τv0。
Embodiment
Cumulative settling in table 1 is changed with time and makees S (t)~t measured curve (Fig. 4 centre circle in log-log coordinate system
Point) withStandard curve (solid line in figure) wiring, makes two curve overlappings (such as Fig. 4), and an optional match point writes down correspondence
Coordinate value[S]=3.16,[t]=62, substitution formula (7), (5), (8) obtain
Release water rate:
The coefficient of consolidation:
Known average pore ratio e=0.861, porosity
The coefficient of conductivity:
Infiltration coefficient: K=μsA=6.58 × 10-2× 0.17=1.12 × 10-2(m/d)
Deformation hysteresis index:
1 deformation observation data of table
The above is only the preferred embodiment of the present invention, it should be pointed out that: those skilled in the art are come
It says, without departing from the principle of the present invention, can also be adjusted to each facility locations, these adjustment also should be regarded as this hair
Bright protection scope.
Claims (8)
1. the two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index, it is characterised in that: including following
Step:
1) it, is formed by the double column run that two-tube China and foreign countries' tube method determines the aquiclude coefficient of consolidation and deformation hysteresis index at the scene
Model is based on double column run model, and deriving reduces a certain constant in inner tube head, and outer tube aquiclude cylinder side is retentively
It is lauched the settling amount Formula Parsing solution of invariant position condition lower outer pipe aquiclude；Wherein, the realization side of the double column run model
Method the following steps are included:
1-1), drill at the scene to the top surface for needing aquiclude to be tested, at the same by outer tube down toward the top surface of aquiclude simultaneously
Soil sample in outer tube more than aquiclude top surface is taken out into drilling；
1-2), outer tube is depressed into the bottom surface of aquiclude using drilling machine pressure from the top surface of aquiclude；
1-3), it is put into inner tube in outer tube hub, equally, will placed under inner tube to the top surface of aquiclude；
1-4), it is pressed into drilling machine pressure drop inner tube to the examination section bottom for needing aquiclude to be tested, and by way of inhaling mud
Aquiclude soil sample in inner tube is sucked out；
1-5), gravel is set as loaded filter in inner tube middle berth, and corresponding in the circular ring shape casing formed between outer tube and inner tube
Gravel is laid with as loaded filter in the examination section top position of aquiclude；It is formed by two-tube China and foreign countries' tube method and determines that aquiclude is solid
The double column run model of clone number and deformation hysteresis index；
2) it, is changed over time according to aquiclude settling amount in the outer tube based on the dial gauge measurement arranged in outer tube aquiclude
Experimental data, the aquiclude coefficient of consolidation and deformation hysteresis index are determined using herbal combination.
2. the two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index according to claim 1,
It is characterized by: the water level of said inner tube head is not less than aquiclude top surface.
3. the two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index according to claim 1,
It is characterized by: ensuring that water level is consistent with the outer level of ground water that drills in circular ring shape casing and inner tube；In circular ring shape casing middle and upper part
Port position is arranged Ma Liaote bottles, and Ma Liaote bottles of water inlet pipe lower end is placed at level of ground water elevation, makes circular ring shape casing
Water level is determined in interior water level holding；Arrangement is drawn water pump line in inner tube, by suction pump bottom of the tube place level of ground water and examination section top surface it
Between, after test is ready to complete, suction pump is instantaneously opened, makes the water-head that water level generates in inner tube, and keep the water of inner and outer pipes
Head difference immobilizes.
4. the two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index according to claim 1,
It is characterized by: arrange settlement observation system in circular ring shape casing, the settlement observation system includes sequentially phase from top to bottom
Dial gauge, rigid rod and the pedestal connect；Pedestal is organic glass plectane, and gathered permeable hole thereon, the reading reflection of dial gauge
The settling amount of the following soil layer of pedestal；After test is ready to complete, suction pump is opened, so that water level in inner tube is generated water-head, and protect
The head difference for holding inner and outer pipes immobilizes, and records the settling amount that the dial gauge arranged in circular ring shape casing is recorded and become at any time
Change.
5. the two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index according to claim 4,
It is characterized by: being based on double column run model, derive a certain not less than the reduction of the head of aquiclude top surface often in inner tube water level
Amount, and outer tube aquiclude cylinder side keeps the settling amount Formula Parsing of underground water invariant position condition lower outer pipe aquiclude
Solution；Then according to aquiclude sedimentation in the circular ring shape casing based on the dial gauge measurement arranged in circular ring shape casing aquiclude
The experimental data changed over time is measured, the aquiclude coefficient of consolidation and deformation hysteresis index are determined using herbal combination.
6. the two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index according to claim 4,
It is characterized by: aquiclude settling amount changes over time in the inner tube based on the dial gauge measurement arranged in circular ring shape casing
Experimental data determines the aquiclude coefficient of consolidation and deformation hysteresis index using herbal combination, i.e., will be in the circular ring shape casing of record
It is bent that S (t)~t actual measurement is made in the variation of the settling amount S measured t at any time in the log-log coordinate system with standard curve identical molds
Line, withStandard curve wiring, makes two curve overlappings, and an optional match point writes down corresponding coordinate value[S]、[t] substitutes into respective formula and calculates aquiclude coefficient of consolidation CvWith deformation hysteresis index τv0。
7. original position described in -6 any one determines pair of the aquiclude coefficient of consolidation and deformation hysteresis index according to claim 1
Manage outer tube method, it is characterised in that: the outer tube diameter is 127mm.
8. the two-tube outer tube method in situ for determining the aquiclude coefficient of consolidation and deformation hysteresis index according to claim 7,
It is characterized by: said inner tube diameter is 75mm, inner tube material is PVC inner tube.
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| CN2684182Y (en) * | 2004-03-24 | 2005-03-09 | 中国科学院新疆生态与地理研究所 | Automatic water-supplying double-ring infiltration instrument |
| US9157666B2 (en) * | 2012-06-07 | 2015-10-13 | Braun Intertec Geothermal, Llc | Ground heat exchange processes and equipment |
| CN102809642B (en) * | 2012-08-03 | 2015-04-29 | 河海大学 | Method for determining hydrogeological parameters of aquitard |
| CN203758880U (en) * | 2014-02-19 | 2014-08-06 | 河海大学 | Experiment device for researching permeation mechanism of low-permeability oil layer |
| CN204101416U (en) * | 2014-09-05 | 2015-01-14 | 中国葛洲坝集团国际工程有限公司 | Geotechnique's original position dicyclo infiltration experiment device |
| CN204177712U (en) * | 2014-11-05 | 2015-02-25 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of earth's surface, slope, field double-ring infiltration instrument |
| CN105628612B (en) * | 2016-02-02 | 2018-05-25 | 河海大学 | It is a kind of to determine drawdown and induce clay artesian aquifer and release the device of water to release water method |
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2016
- 2016-12-13 CN CN201611149736.0A patent/CN106596372B/en active Active
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