CN106018110A - Testing device for gas-liquid cooperative seepage-stress coupling - Google Patents
Testing device for gas-liquid cooperative seepage-stress coupling Download PDFInfo
- Publication number
- CN106018110A CN106018110A CN201610522719.0A CN201610522719A CN106018110A CN 106018110 A CN106018110 A CN 106018110A CN 201610522719 A CN201610522719 A CN 201610522719A CN 106018110 A CN106018110 A CN 106018110A
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- Prior art keywords
- pressure
- gas
- liquid
- pore
- holder
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
-
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
The invention discloses a testing device for gas-liquid cooperative seepage-stress coupling. Pore gas pressure and pore water pressure are applied to a pressure adding fixer at the same time, the gas pressure and the water pressure are transmitted into a gas-liquid mixer to be fully mixed, and the water and gas mixture is added to a testing sample end face together. The gas and liquid mixture can be uniformly added, testing sample end face stress concentration caused by gas and liquid pressure concentration can be avoided, gas-liquid seepage-stress coupling testing and researching can be carried out, testing errors can be reduced, and results better conform to practical situations.
Description
Technical field
The present invention relates to a kind of gas-liquid and work in coordination with the assay device of seepage-pipe coupling model, under the conditions of can be used for air-liquid seepage flow
Stress adds, the seepage-pipe coupling model assay device that especially gas and two kinds of different mediums of liquid are added jointly.
Background technology
The initial fissure of rock material, hole and joint are gas and liquid flowing in rock provides passage, rock
Stone is acted on by air-liquid seepage-pipe coupling model, and its stress state is extremely complex.In order to study the change of rock in this kind of environment
Shape seepage characteristic, various rock test devices arise at the historic moment.But, the rock triaxial compressions device of present stage can only unilaterally
Pore water pressure or hole air pressure are provided, and hydraulic pressure air pressure distribution is uniform not on sample and device contact surface, easily causes
Sample end face stress is concentrated, it is impossible to reaction rock force-bearing situation in complex environment definitely, but also can accelerate sample and break
Bad, bring difficulty to experimental study, result of the test is the most true and reliable, easily causes false judgment.
Summary of the invention
In order to overcome the deficiency of existing assay device, a kind of gas-liquid of the present invention works in coordination with the test dress of seepage-pipe coupling model
Putting, this device is possible not only to unilaterally add hydraulic pressure or air pressure, it is also possible to test is added hydraulic pressure and air pressure, pressure hole simultaneously
The pressure a diameter of 1.5cm of added holes, spacing is 2cm；Inside holder, high efficiency cylinder type gas-liquid is set and works in coordination with mixing bunker, its
A diameter of 50mm, height is 40mm, and gas and the liquid input come in are sufficiently mixed, and are then delivered to holder termination pore pressure and add
Add in hole；On holder termination, the number of pore water pressure added holes is too many, and the strength and stiffness of holder termination can be made to subtract
Weak, thus cause test pressure applying uneven and produce stress concentration phenomenon causing rock sample premature degradation, cause examination
Test the false consequence of data；And if number is very few, pore water pressure can be made can not to be distributed in test specimen end sufficiently uniformly
On face.Found by lot of experiments research: pore water pressure subtracts along with the increase of abporal lacuna water pressure added holes centre distance
Little, pore pressure that test draws, pore water pressure added holes diameter, any point distance pore water pressure added holes center on end face
The relational expression of distance is shown below.
q = p(1-l/2d)
Note: in formulaqPore pressure for after reduction:pFor original pore pressure；lAdd for any point distance pore water pressure on end face
The distance at center, hole；dFor pore water pressure added holes diameter.
Former pore water pressure added holes a diameter of 2.5mm, according to above formula, draw two pore pressure added holes centre distancesl = 7.5mm.By so arranging the distance at two pore pressure added holes centers, on the basis of can keeping holder strength and stiffness
The pressure provided is evenly distributed to sample end, holder termination arranges altogether 25 pore pressure added holes.
The technical solution adopted for the present invention to solve the technical problems is: sample holder is divided into single-phase pressure add and
Two-phase pressure adds holder.Uniaxial pressure adds holder can unilaterally provide air pressure or hydraulic pressure, two-phase to sample
Pressure adds holder then can provide air pressure and hydraulic pressure to sample simultaneously.According to testing program, select suitable holder, enter
Row pressure adds.When selecting two-phase pressure to add holder, by same to hole air pressure adding set and pore water pressure adding set
Time be connected on holder, high efficiency air and liquid mixer is set inside holder, by the most mixed for gas and the liquid added
Close, reach the effect of gas-liquid integral, sample is carried out two-phase pressure interpolation.On holder with sample contacts face, will be original
Single hole holder termination be modified to porous termination, the pressure added is evenly distributed on sample end face, it is to avoid local should
The problem that power is concentrated, reaches the equally distributed purpose of stress.
The invention has the beneficial effects as follows, sample can be added air pressure and hydraulic pressure simultaneously, and gas-liquid is sufficiently mixed, all
Add sample end face to evenly；Keep holder strength and stiffness simultaneously, so that it is guaranteed that the most effectively applying of test pressure.Dress
Putting improvement and only need to improve sample holder, result of the test reliability increases；And the principle of the invention is simple, easily realizes.
Accompanying drawing explanation
Fig. 1 is that single-phase pressure adds fixer structure schematic diagram, and wherein, label 1 is gas or liquid added holes.
Fig. 2 is that two-phase pressure adds fixer structure schematic diagram, and wherein, label 2 and 3 is respectively gas and liquid adds
Hole.
Fig. 3 is holder schematic longitudinal section, and wherein, label 4 and 5 is respectively gas passage and fluid passage；Label 6 is
Gas-liquid passage, label 7 is collaborative gas-liquid mixed storehouse.
Fig. 4 is holder termination schematic cross-section, and wherein, label 8 is pore pressure added holes.
Fig. 5 is holder termination pore pressure added holes schematic diagram.
Detailed description of the invention
In order to overcome the deficiency of existing assay device, the invention provides a kind of gas-liquid and work in coordination with seepage-pipe coupling model
Assay device, this device is possible not only to unilaterally add hydraulic pressure or air pressure, it is also possible to test is added hydraulic pressure and air pressure simultaneously,
The a diameter of 1.5cm of air pressure pore pressure added holes, spacing is 2cm；Inside holder, high efficiency air and liquid mixer is set, will input
Gas and the liquid come in are sufficiently mixed, and are then delivered in the pore pressure added holes of holder termination；On holder termination, pore water
The number of pressure added holes is too many, and the strength and stiffness of holder termination can be made to weaken, thus causes testing pressure and apply inequality
Even and generation stress concentration phenomenon can cause rock sample premature degradation, causes the false consequence of test data；If it is and individual
Number is very few, and pore water pressure can be made can not to be distributed in sufficiently uniformly on test specimen end face.Found by lot of experiments research: hole
Gap water pressure reduces along with the increase of abporal lacuna water pressure added holes centre distance, tests pore pressure, the pore water pressure drawn
On added holes diameter, end face, the relational expression of the distance at any point distance pore water pressure added holes center is shown below.
q = p ( 1 - l/2d )
Wherein,qPore pressure for after reduction:pFor original pore pressure；lFor in any point distance pore water pressure added holes on end face
The distance of the heart；dFor pore water pressure added holes diameter.
The former holder termination a diameter of 2.5mm of pore water pressure added holes, according to above formula, draws in two pore pressure added holes
Heart distancel =7.5mm.By so arranging the distance at two pore pressure added holes centers, holder intensity can kept with just
On the basis of degree, the pressure provided is evenly distributed to sample end, holder termination arranges altogether 25 pore pressure and adds
Hole.
The technical solution adopted for the present invention to solve the technical problems is: sample holder is divided into single-phase pressure add and
Two-phase pressure adds holder.Uniaxial pressure adds holder can unilaterally provide air pressure or hydraulic pressure, two-phase to sample
Pressure adds holder then can provide air pressure and hydraulic pressure to sample simultaneously.According to testing program, select suitable holder, enter
Row pressure adds.When selecting two-phase pressure to add holder, by same to hole air pressure adding set and pore water pressure adding set
Time be connected on holder, high efficiency air and liquid mixer is set inside holder, by the most mixed for gas and the liquid added
Close, reach the effect of gas-liquid integral, sample is carried out two-phase pressure interpolation.On holder with sample contacts face, will be original
Single hole holder termination be modified to porous termination, the pressure added is evenly distributed on sample end face, it is to avoid local should
The problem that power is concentrated, reaches the equally distributed purpose of stress.
The invention has the beneficial effects as follows, sample can be added air pressure and hydraulic pressure simultaneously, and gas-liquid is sufficiently mixed, all
Add sample end face to evenly；Keep holder strength and stiffness simultaneously, so that it is guaranteed that the most effectively applying of test pressure.Dress
Putting improvement and only need to improve sample holder, result of the test reliability increases；And the principle of the invention is simple, easily realizes.
When needs add hole air pressure or pore water pressure, select holder shown in Fig. 1, sample is arranged on upper and lower two
On individual holder, it is then placed in triaxial compressions indoor；Examination in advance adds pore water pressure or hole air pressure, if examination adds smoothly, and will
The joint of pore water pressure or hole air pressure is connected to Fig. 1 pressure and adds on holder joint 1, then fixing tight with spanner.Open
Begin single-phase pressure add test.
When sample is added pore water pressure and hole air pressure by needs simultaneously, select holder shown in Fig. 2, sample is installed
On upper and lower holder, it is then placed in triaxial compressions indoor；Examination in advance adds pore water pressure and hole air pressure, and examination adds smoothly, will
Pore water pressure joint and hole pneumatic fittings are coupled with Fig. 2 pressure and add on holder joint 2 and 3, then fix with spanner
Tightly, put down three axocoels, carry out punching oil, open confined pressure adder and add confined pressure, open pore water pressure adder and hole the most simultaneously
Gap air pressure adder, then turns on air and liquid mixer, allows gas and liquid add sample section to after being sufficiently mixed, carries out gas-liquid
Seepage-pipe coupling model is tested.
Claims (4)
1. a gas-liquid works in coordination with the assay device of seepage-pipe coupling model, it is characterised in that: added holes simultaneously in sample holder
Gap hydraulic pressure and hole air pressure, a diameter of 1.5cm of air pressure pore pressure added holes, spacing is 2cm；Inside holder, high efficiency is set
Cylindrical gas-liquid works in coordination with mixing bunker, its a diameter of 50mm, and height is 40mm, and gas and the liquid input come in are sufficiently mixed,
Then mixture is sent in the pore pressure added holes of holder termination；The termination a diameter of 2.5mm of pore pressure added holes, two adjacent adding
Add hole center distance 7.5mm, whole holder termination arranges altogether 25 holder termination pore pressure added holes.
A kind of gas-liquid the most according to claim 1 works in coordination with the assay device of seepage-pipe coupling model, it is characterised in that: permissible
Single-phase interpolation pore water pressure or hole air pressure, it is also possible to be added, two-phase pressure adds holder and is internally provided with simultaneously
High efficiency air and liquid mixer, can be sufficiently mixed the hydraulic pressure being added and air pressure simultaneously, forms aqueous vapor body and adds sample to
End face.
A kind of gas-liquid the most according to claim 1 works in coordination with the assay device of seepage-pipe coupling model, it is characterised in that permissible
Uniformly add liquid, gas or aqueous vapor body to sample end face, it is to avoid sample end face problem of stress concentration occurs.
4. a gas-liquid works in coordination with the assay device of seepage-pipe coupling model, it is characterised in that: pore water pressure is along with abporal lacuna hydraulic pressure
The increase of power added holes centre distance and reduce, any point on pore pressure that test draws, pore water pressure added holes diameter, end face
The determination of distance at distance pore water pressure added holes center should be according to formulaq = p ( 1 - l/2d )Determine, wherein,q
Pore pressure for after reduction:pFor original pore pressure；lFor the distance at any point distance pore water pressure added holes center on end face；d
For pore water pressure added holes diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610522719.0A CN106018110B (en) | 2016-07-05 | 2016-07-05 | A kind of experimental rig of gas-liquid collaboration seepage-pipe coupling model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610522719.0A CN106018110B (en) | 2016-07-05 | 2016-07-05 | A kind of experimental rig of gas-liquid collaboration seepage-pipe coupling model |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106018110A true CN106018110A (en) | 2016-10-12 |
| CN106018110B CN106018110B (en) | 2019-05-31 |
Family
ID=57107158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610522719.0A Expired - Fee Related CN106018110B (en) | 2016-07-05 | 2016-07-05 | A kind of experimental rig of gas-liquid collaboration seepage-pipe coupling model |
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| Country | Link |
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| CN (1) | CN106018110B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255547A (en) * | 2017-08-10 | 2017-10-17 | 中国地震局工程力学研究所 | A kind of dynamic pore hydraulic gage calibrating pressure chamber device and calibration method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1453259A1 (en) * | 1986-01-07 | 1989-01-23 | Ю.Н.Крючков | Method of determining distribution of volume of pores by sizes |
| CN102252918A (en) * | 2011-06-30 | 2011-11-23 | 中国科学院武汉岩土力学研究所 | Three-axis test device and methods for sediments including gas hydrates |
| CN104260408A (en) * | 2014-07-24 | 2015-01-07 | 重庆大学 | Heat-fluid-solid coupling multi-phase fluid fracturing-seepage combined pressure head for reservoir permeable medium |
| CN204536174U (en) * | 2015-03-13 | 2015-08-05 | 西安科技大学 | Fragmented rock body compacting and seepage characteristic experimental apparatus for research |
| CN104977234A (en) * | 2015-06-23 | 2015-10-14 | 安徽理工大学 | Pressure rock failure and instability process and dynamic permeability test apparatus and method thereof |
-
2016
- 2016-07-05 CN CN201610522719.0A patent/CN106018110B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1453259A1 (en) * | 1986-01-07 | 1989-01-23 | Ю.Н.Крючков | Method of determining distribution of volume of pores by sizes |
| CN102252918A (en) * | 2011-06-30 | 2011-11-23 | 中国科学院武汉岩土力学研究所 | Three-axis test device and methods for sediments including gas hydrates |
| CN104260408A (en) * | 2014-07-24 | 2015-01-07 | 重庆大学 | Heat-fluid-solid coupling multi-phase fluid fracturing-seepage combined pressure head for reservoir permeable medium |
| CN204536174U (en) * | 2015-03-13 | 2015-08-05 | 西安科技大学 | Fragmented rock body compacting and seepage characteristic experimental apparatus for research |
| CN104977234A (en) * | 2015-06-23 | 2015-10-14 | 安徽理工大学 | Pressure rock failure and instability process and dynamic permeability test apparatus and method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 廖红建 等: "《土木工程研究生系列教材 岩土工程测试》", 30 September 2007 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255547A (en) * | 2017-08-10 | 2017-10-17 | 中国地震局工程力学研究所 | A kind of dynamic pore hydraulic gage calibrating pressure chamber device and calibration method |
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| CN106018110B (en) | 2019-05-31 |
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