CN108760564A - For testing the persistent experimental provision of gas in unsaturation sand - Google Patents
For testing the persistent experimental provision of gas in unsaturation sand Download PDFInfo
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- CN108760564A CN108760564A CN201810693504.4A CN201810693504A CN108760564A CN 108760564 A CN108760564 A CN 108760564A CN 201810693504 A CN201810693504 A CN 201810693504A CN 108760564 A CN108760564 A CN 108760564A
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- 239000004576 sand Substances 0.000 title claims abstract description 60
- 238000012360 testing method Methods 0.000 title claims abstract description 13
- 230000002085 persistent effect Effects 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 176
- 238000005303 weighing Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 16
- 230000000116 mitigating effect Effects 0.000 claims abstract description 3
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 18
- 230000002688 persistence Effects 0.000 abstract description 6
- 238000005325 percolation Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 19
- 239000012530 fluid Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 230000010412 perfusion Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 241000193395 Sporosarcina pasteurii Species 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical class [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- IRPDISVJRAYFBI-UHFFFAOYSA-N nitric acid;potassium Chemical compound [K].O[N+]([O-])=O IRPDISVJRAYFBI-UHFFFAOYSA-N 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000011091 sodium acetates Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses one kind for testing the persistent experimental provision of gas in unsaturation sand, including seepage flow cylinder, head adjusting unit and weighing unit；Wherein, the seepage flow cylinder includes for holding the cylinder of sand, for generating the head cover of gas volume after calculating sand desaturation processing and causing the bottom cover of impact to sand for mitigating flow；It includes the high water tank and lower water box that flow is connect and generated in sand with the head cover of seepage flow cylinder and bottom cover that the head, which adjusts unit,；The seepage flow cylinder is placed on weighing unit, and the mass change that seepage flow cylinder is weighed by weighing unit calculates the volume of sand emergent gas.The experimental provision simple structure of the present invention, it is easy to assembly, can meet the needs of desaturation experimental stage calculating sand saturation degree variation, and the escaped quantity of gas in sand can be recorded in real time in gas persistence test phase, seepage flow length and percolation path can freely be converted according to experiment demand.
Description
Technical field
It is especially a kind of suitable for measuring gas biological desaturation processing liquefied sand the present invention relates to a kind of experimental provision
The persistent experimental provision of body.
Background technology
Sand foundation Liquefaction is one of important topic of geotechnical study, and traditional strong rammer, broken stone pile, cement are solid
Though the methods of change is effective, because construction cost is high, construction technical requirement is complicated, durability is poor, big etc. to environmental hazard
Reason can not be even more without meter for the liquefaction foundation treatment under built construction as the processing method of processing large area sand liquefaction
It can apply.Have the method that scholar generates bubble using bacterial solution and Induction of bacterial is injected into liquefied sand at present, to sand into
Row desaturation is handled, and proves that this method is highly effective by experiments such as shake table, dynamic triaxials.This method effect on environment
It is small, it is environmentally protective, it has a extensive future.But this method, which is generalized in practical application, can also face the persistent problem of gas.
The sandy soils for having liquefaction dangerous be normally at phreatic line hereinafter, and underground water is rarely in totally stationary state, when having
When flow, how the bubble that desaturation processing generates can be assessed with dribbling and improves gas in denitrification processing sand
Persistence is many scholar's issues that need special attentions, however traditional seepage apparatus cannot meet desaturation processing and gas is lasting
Property test two processes demand.
Invention content
Goal of the invention：The present invention is intended to provide a kind of can carry out sand desaturation processing and after not disturbance treatment
The experimental provision of gas persistence test is carried out on the basis of sand.
Technical solution：The present invention is for testing the persistent experimental provision of gas in unsaturation sand, including seepage flow cylinder, water
Head adjusts unit and weighing unit；Wherein, seepage flow cylinder includes for holding the cylinder of sand, for calculating sand desaturation processing
The head cover of gas volume is generated afterwards and causes the bottom cover of impact to sand for mitigating flow；Head adjusts unit
The head cover of cylinder connects with bottom cover and generates the high water tank and lower water box of flow in sand；Seepage flow cylinder is placed in weighing unit
On, the mass change that seepage flow cylinder is weighed by weighing unit calculates the volume of sand emergent gas.
Preferably, head cover includes exhaust chamber, measuring chamber and filter chamber from top to bottom, wherein the company of opening up at the top of exhaust chamber
Interface and water injection hole.Further, exhaust chamber is cone, opens up connector at top center and installs valve, deviates top
Portion opens up water injection hole at center.
Bottom cover includes filter chamber and surge chamber from top to bottom, wherein the surge chamber bottom opens up connecting hole and installs valve
Door.
It is additionally provided with firm banking between seepage flow cylinder and weighing unit, which is equipped with and is longitudinally arranged for seepage flow cylinder
Longitudinal cavity or lateral arrangement transverse concave groove.
When seepage flow cylinder is longitudinally arranged in firm banking, bottom cover bottom is connect with high water tank by pipeline, at the top of head cover
It is connect by pipeline with lower water box or bottom cover bottom is connect with lower water box by pipeline, head cover top and high water tank
It is connected by pipeline；When seepage flow cylinder lateral arrangement is in firm banking, bottom cover bottom is connect with high water tank by pipeline, head cover
Top is connect with lower water box by pipeline.
It further includes that water feeding tank, high water tank and lower water box are connect by pipeline with water feeding tank that head, which adjusts unit,.Into one
Step ground, high water tank and the interior spilling water partition board that is equipped with of lower water box will be divided into overflow area and water reserve inside water tank, the spilling water partition board
Height be less than water tank wall.It further includes holder that head, which adjusts unit, and altitude scale, high water tank and low are equipped on the holder
Position water tank is set on holder.High water tank and lower water box are equipped with arrow, the height and spilling water partition board of the arrow
Height it is identical.
Advantageous effect：Compared with prior art, experimental provision simple structure of the invention, it is easy to assembly, can meet subtract it is full
The demand of sand saturation degree variation is calculated with the experimental stage, and can record gas in sand in real time in gas persistence test phase
Escaped quantity, seepage flow length and percolation path can freely convert according to experiment demand, meanwhile, the experimental provision is of low cost,
Applicability is wide.
Description of the drawings
Fig. 1 is the assembling schematic diagram of experimental provision of the present invention；
Fig. 2 (a) is the structural schematic diagram of seepage flow cylinder；
Fig. 2 (b) is the structural schematic diagram of head cover；
Fig. 2 (c) is the structural schematic diagram of bottom cover；
Fig. 3 (a) is the diagrammatic cross-section of head cover；
Fig. 3 (b) is the diagrammatic cross-section of bottom cover；
Fig. 4 (a) is the structural schematic diagram of high water tank；
Fig. 4 (b) is the structural schematic diagram of lower water box；
Fig. 5 is the structural schematic diagram of holder；
Fig. 6 is the structural schematic diagram of firm banking；
Fig. 7 is that sample saturation degree changes over time figure；
Fig. 8 is that sample permeability coefficient changes over time figure.
Specific implementation mode
Technical scheme of the present invention is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2 shown in (a) -2 (c) and Fig. 3 (a) -3 (b), experimental provision of the invention includes seepage flow cylinder 1, head tune
Unit 2 and weighing unit 3 are saved, seepage flow cylinder 1 includes cylinder 101, head cover 102 and bottom cover 103.Cylinder 101, head cover 102 and bottom cover
It is linked by ring flange between 103, wherein the ring flange of head cover 102 and bottom cover 103 has annular groove 114 and in annular groove 114
Place sealing ring 110.Experiment sand is contained in cylinder 101, and cylinder inboard wall is frosted form to increase between inner wall and sand
Filtrational resistance.Head cover is from top to bottom divided into exhaust chamber 111, measuring chamber 112 and filter chamber 113, measures chamber interior walls and indicates volume
Scale 109 enables liquid level in seepage flow cylinder be located near the bottom volume markings of measuring chamber when carrying out desaturation processing to sand, soil
The gas generated in vivo can be such that water level rises, and calculating the volume risen by volume markings can calculate what desaturation processing generated
Gas volume.Exhaust chamber 111 is cone, and the geometric center position for measuring head cover is provided with the connecting hole at perforation top, and installs
Valve 104 with fast interface is provided with water injection hole in the position for deviateing geometric center, and installs water injection pipe 106, and water injection pipe is attached
There is a sealing-plug 108,106 nozzle of water injection pipe is higher than fast interface, after desaturation processing procedure, by water injection pipe 106 to oozing
In flow cartridge 1 plus water is until water is overflowed from connecting hole, you can fills up seepage flow cylinder to carry out next step experiment.Bottom cover 103 by up to
Under be divided into filter chamber 113 and surge chamber 115, surge chamber 115 can mitigate flow to testing the impact of sand.Head cover 102 and bottom cover
Permeable stone 105 is installed, to prevent experiment sand flowing in 103 filter chamber.
Head adjusts unit 2 by 207 groups of holder 201, high water tank 202, lower water box 203, water feeding tank 206 and water pump
At.There is spilling water partition board 204 as shown in Fig. 4 (a) -4 (b), inside water tank, divider height is less than water tank wall, and water tank is divided into storage
Pool and overflow area.In water reserve, side wall is provided with connecting hole and installs the valve 104 with fast interface, is provided in overflow area excessive
Water hole 209.In addition, being also provided with water supply hole 212 in the water reserve of high water tank.When carrying out Seepage Experiment, in water tank water reserve
Water level can maintain at the top of spilling water partition board, thus constitute constant head.High water tank and lower water box back tank wall laterally to
Flank is extended to form outside, each flank opens two mounting holes 210, and holes is located along the same line in vertical direction.In water tank
One wing has arrow 211, arrow height identical as spilling water partition board overhead height.There are two vertical strip holes on holder
208, strip hole width is identical as fixed bore dia, and two strip pitchs of holes are identical as the fixed pitch of holes of the row of water tank flank two, by spiral shell
Nail installs nut in the other side and tightens and water tank can be fixed on holder across mounting hole and strip hole.As shown in figure 5,
Side identical with arrow 211 has altitude scale 205, arrow meaning altitude scale to indicate water in water tank on holder
Position height.
Firm banking 301 as shown in FIG. 6, basic configuration are truncated rectangular pyramids, longitudinal using wherein frustum axis as axis turning
Go out to be slightly larger than the cylindrical cavity of seepage flow cylinder bottom cover, laterally goes out radius and seepage flow cylinder cylinder half by axis turning of frustum upper surface axis
The equal transverse concave groove 304 of diameter, on the direction of groove, from cylindrical cavity to one side opening of frustum.In cylindrical cavity week
Mounting hole 303 there are four enclosing out, the position of mounting hole is corresponding with four holes on seepage flow cylinder bottom cover ring flange, in assembling seepage flow
When cylinder mounting flange, corresponding four holes are connected using special screw 107, and special screw length is thick much larger than ring flange
Special screw can be inserted into four mounting holes to fix seepage flow cylinder by degree after assembling.Firm banking should be placed in the weighing of weighing unit
On pedestal 302, when testing sand internal gas persistence to sand water flowing, it need to use and weigh pedestal weighing firm banking and ooze
Flow cartridge includes the gross mass of sand and liquid in seepage flow cylinder, and when there is gas effusion in sand, its quality will produce variation, according to
The variation of quality can calculate gas escaped quantity.By weighing the water of lower water box outflow in the set time, flow velocity can be calculated, is tied
The infiltration coefficient of sample can be calculated by closing fix-head difference and specimen size.In addition, seepage flow cylinder can be also horizontally placed on cross by the device
Into groove 304, to carry out lateral Seepage Experiment.
It is as shown in Figure 1 after experimental provision assembling, wherein the water supply hole of high water tank is connected to water pump by water pipe.It is high
The spillway hole water receiving pipe of position water tank and lower water box, the water pipe other end are positioned in water feeding tank.When the lateral seepage flow of progress or water
When Seepage Experiment in flow direction, the connecting hole application water pipe of seepage flow cylinder bottom cover is connected to the connecting hole of high water tank, and seepage flow cylinder is surveyed
The connecting hole of amount head cover need to be connected to the connecting hole of lower water box with water pipe.When the downward Seepage Experiment of progress flow, seepage flow
The connecting hole application water pipe of cylinder bottom cover is connected to the connecting hole of lower water box, and the connecting hole that seepage flow cylinder measures head cover need to be connected with water pipe
It is connected to the connecting hole of high water tank.
The seepage flow cylinder quantity and length of the present invention can increase as needed.Multiple seepage flow cylinder cylinders are connected by ring flange
Sand specimen length can be increased together.In addition can by water pipe by multiple seepage flow cylinders head and the tail connect, with observe sample in
When the different location in water route, the lasting sex differernce of internal gas.
Experimental procedure：
1, desaturation handles sand sample
(1) bottom cover of seepage flow cylinder is connect with cylinder by screw and nut, wherein four corresponding open hole applications are special
Screw connects, and ring flange fluting planted agent is put into sealing ring, is fixed in after assembling on firm banking and by the valve on bottom cover
It closes.
(2) desaturation treatment fluid (such as solution containing denitrifying bacteria and necessary material) is injected in seepage flow cylinder, is sprinkled into
Sand is tested, and sand is kept to be constantly in treatment fluid liquid level once, until filling up, to ensure the saturation of original sample, at this time
Treatment fluid liquid level should be equal with cylinder upper end.
(3) the measurement head cover of seepage flow cylinder is mounted on cylinder, the valve on head cover is opened and by the stopple of water injection pipe
It pulls out, treatment fluid is filled into head cover from water injection pipe, until a certain volume markings in liquid level gauging room overlap in head cover, later by valve
It is a that door, which closes and records the corresponding volume markings of liquid level,.
(4) sample is placed into a period of time progress desaturation processing, observes and measures liquid level in head cover and rises situation, liquid level pair
It is the gas volume generated in sand to answer volume markings and the difference of a, can be carried out in next step when reaching experiment desirable value
Operation.
(5) valve for measuring head cover is opened, by water injection pipe water filling into measurement head cover, until water is overflowed from valve port,
Valve is closed, the effective stopple of water filling is clogged.
2, Seepage Experiment
(1) seepage flow cylinder is placed on together with firm banking and is weighed on pedestal (need to be horizontal by seepage flow cylinder when lateral seepage flow).
(2) both wings of high water tank and lower water box are adjacent to holder, and mounting hole are aligned with the strip hole of holder, root
According to the altitude scale on the arrow and holder on water tank, the difference in height of regulating tank high water tank and lower water box is extremely tested
Water tank and holder are fixed together by required numerical value with screw and nut.
(3) plus water is placed in water tank, and by water pump in water tank.
(4) valve on high water tank is closed, the water pump in the water supply hole and water tank of high water tank is connected with water pipe,
Water pump is opened, water reserve water level rises up to inflow overflow area, is led back the water in overflow area in water tank by water pipe,
The valve port installation water pipe of high water tank simultaneously opens valve, until water pipe is full of the fast interface that its other end is inserted into bottom cover after water
(carrying out that the fast interface for measuring head cover should be inserted into when downward Seepage Experiment).
(5) valve of lower water box is closed, manually to lower water box water reserve Jia Shui, is installed in the valve port of lower water box
Water pipe simultaneously opens valve, until water pipe (carries out downward seepage flow full of its other end to be inserted into the fast interface for measuring head cover after water
The fast interface of bottom cover should be inserted into when experiment).Continue to add water to spilling to lower water box water reserve, it will be in overflow area with water pipe
Water leads back water tank.
(6) valve on seepage flow cylinder is opened, forms access, you can generate flow in sand.
(7) record weighs the registration variation of pedestal until experiment terminates at regular intervals.When there is gas effusion in sand
When, escaping gas is taken out of by flowing water, weighs the quality that pedestal claims and becomes larger, the ratio of the density of increased quality and flowing water is
For the volume of emergent gas.Pedestal can will be weighed when needing is connected to computer real-time recorded data.
Specific test example
(1) prepare sand sample
It tests sand sample and uses Ottawa sand, the proportion that the sand is measured before experiment is 2.66.
(2) sample is filled
Bottom cover is connect with cylinder, perfusion pure water fills up surge chamber and the filter chamber of bottom cover.It is added into cylinder a certain amount of
Denitrifying bacteria treatment fluid (treatment fluid ingredient is：The denitrifying bacteria solution that 10ml/L OD values are 0.4,50mmol/L nitric acid
Potassium, 50mmol/L sodium acetates and other trace elements), and sand-like is perfused using sand rain method, remain liquid in filling process
Face is higher than sand sample, to ensure the fully saturated of sample, until sand sample fills up cylinder.Sample 1, sample making course are made using this method
Middle perfusion treatment fluid 510ml notes sand 1755g, and note sand body product is 659.8cm3, void ratio 0.77.Head cover is installed after perfusion,
Pure water to liquid level is noted by water injection pipe and reaches 0 scale of measuring chamber.
Sample 2 is perfused according to method for making sample identical with sample 1, but liquid is changed by denitrifying bacteria treatment fluid in cylinder
(treatment fluid ingredient is Bacillus pasteurii treatment fluid：500ml/L activity is the Bacillus pasteurii solution of 0.6mS/cmmin,
1mol/L calcium chloride and 1mol/L urea).Treatment fluid 508ml is perfused in sample making course, notes sand 1780g, note sand body product is
669.2cm3, void ratio 0.76.Head cover is installed after perfusion, by water injection pipe water filling and fills up head cover.
(3) drop is oozed and desaturation is handled
Sample 1 is vertically positioned on firm banking, is stood, until liquid level no longer changes in head cover, liquid level eventually arrives at
Scale is 148ml, calculate sample saturation degree be 71%.
Sample 2 is vertically positioned on firm banking, stands 4 days, after the reaction completely of pending liquid, using peristaltic pump the bottom of by
1.5L denitrifying bacteria treatment fluids are perfused in the connecting hole of lid, and liquid is discharged by the connecting hole of head cover in sand.After perfusion, utilize
Needle tubing extracts liquid in head cover out, and liquid level in head cover is made to be down to 0 scale.It stands, until liquid level no longer changes in head cover, liquid level is most
Zhongdao up to scale be 158ml, calculate sample saturation degree be 69%.
(4) Seepage Experiment
Sample is positioned over together with firm banking on meausring apparatus, seepage flow cylinder is connected with pipe fitting and head adjusts unit, adjust
The head difference of whole high water tank and lower water box is 15cm, opens water pump and picture lower water box water filling manually in water feeding tank, waits for height
In position water tank and lower water box after stable level, each valve of device for opening forms seepage flow access, and records meausring apparatus
Registration changes.Every 12 hours, the flow of flow in two samples in the set time is measured, according to fix-head difference and sample
Length and sectional area, you can calculate the permeability variation of sample.
(5) analysis saturation degree variation
In sample after gas effusion, space is filled by water, to make sample mass increase, increased quality divided by water
Density, as escaping gas volume.
The sample saturation degree variation being calculated according to experimental record is as shown in Figure 7；It is calculated according to experimental record
The variation of style permeability is as shown in Figure 8.
It has been found that in the case where not carrying out drop and oozing processing, gas escape analysis number with faster speed in sample, sharp
With Bacillus pasteurii carry out drop ooze processing after, permeability has apparent change, and gas escape speed is substantially reduced, explanation
Drop oozes processing has preferable promotion effect to the persistence of gas.
Claims (10)
1. one kind is for testing the persistent experimental provision of gas in unsaturation sand, it is characterised in that：Including seepage flow cylinder (1),
Head adjusts unit (2) and weighing unit (3)；Wherein, the seepage flow cylinder (1) includes for holding the cylinder of sand (101), using
The head cover (102) of gas volume is generated after calculating sand desaturation processing and causes the bottom of impact to sand for mitigating flow
It covers (103)；It includes the height that flow is connect and generated in sand with the head cover of seepage flow cylinder and bottom cover that the head, which adjusts unit (2),
Position water tank (202) and lower water box (203)；The seepage flow cylinder (1) is placed on weighing unit (3), is oozed by weighing unit weighing
The mass change of flow cartridge calculates the volume of sand emergent gas.
2. experimental provision according to claim 1, it is characterised in that：The head cover (102) includes exhaust chamber from top to bottom
(111), measuring chamber (112) and filter chamber (113), wherein open up connector and water injection hole at the top of the exhaust chamber (111).
3. experimental provision according to claim 2, it is characterised in that：The exhaust chamber (111) is conical, in top
Connector is opened up at the heart and valve is installed, and is deviateed and is opened up water injection hole at top center.
4. experimental provision according to claim 1, it is characterised in that：The bottom cover (103) includes filter chamber from top to bottom
(113) and surge chamber (115), wherein surge chamber (115) bottom opens up connecting hole and installs valve.
5. experimental provision according to claim 1, it is characterised in that：Between the seepage flow cylinder (1) and weighing unit (3) also
Equipped with firm banking (301), which is equipped with for the longitudinally arranged longitudinal cavity of seepage flow cylinder or lateral arrangement
Transverse concave groove.
6. experimental provision according to claim 5, it is characterised in that：When seepage flow cylinder (1) is longitudinally arranged in firm banking
(301) when, bottom cover bottom is connect with high water tank by pipeline, and head cover top is connect by pipeline with lower water box or bottom
Base portion is connect with lower water box by pipeline, is connect by pipeline with high water tank at the top of head cover；When the lateral cloth of seepage flow cylinder (1)
When being placed in firm banking (301), bottom cover bottom is connect with high water tank by pipeline, passes through pipeline with lower water box at the top of head cover
Connection.
7. experimental provision according to claim 1, it is characterised in that：It further includes water feeding tank that the head, which adjusts unit (2),
(206), high water tank (202) and lower water box (203) are connect by pipeline with water feeding tank (206).
8. experimental provision according to claim 1, it is characterised in that：The high water tank (202) and lower water box (203)
The interior spilling water partition board (204) that is equipped with will be divided into overflow area and water reserve inside water tank, and the height of the spilling water partition board (204) is less than water tank
Wall.
9. experimental provision according to claim 8, it is characterised in that：It further includes holder that the head, which adjusts unit (2),
(201), it and on the holder (201) is equipped with altitude scale, the high water tank (202) and lower water box (203) are set to holder
(201) on.
10. experimental provision according to claim 9, it is characterised in that：The high water tank (202) and lower water box
(203) it is equipped with arrow (211), the height of the arrow (211) is identical with the height of spilling water partition board (204).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810693504.4A CN108760564B (en) | 2018-06-29 | 2018-06-29 | Experimental device for be arranged in testing unsaturated sand gas persistence |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810693504.4A CN108760564B (en) | 2018-06-29 | 2018-06-29 | Experimental device for be arranged in testing unsaturated sand gas persistence |
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| CN108760564B CN108760564B (en) | 2024-04-19 |
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