CN106053312A - Testing device for representing space-time evolution of pore structure of porous medium and application method of testing device - Google Patents
Testing device for representing space-time evolution of pore structure of porous medium and application method of testing device Download PDFInfo
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- CN106053312A CN106053312A CN201610348335.1A CN201610348335A CN106053312A CN 106053312 A CN106053312 A CN 106053312A CN 201610348335 A CN201610348335 A CN 201610348335A CN 106053312 A CN106053312 A CN 106053312A
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- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 239000011148 porous material Substances 0.000 title claims abstract description 31
- 238000010998 test method Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000011440 grout Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 238000007569 slipcasting Methods 0.000 claims description 25
- 238000002474 experimental method Methods 0.000 claims description 20
- 238000001764 infiltration Methods 0.000 claims description 19
- 230000008595 infiltration Effects 0.000 claims description 19
- 238000003556 assay Methods 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 15
- 238000011161 development Methods 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 7
- 239000010935 stainless steel Substances 0.000 abstract description 7
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 15
- 239000002689 soil Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
Classifications
-
- 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
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a testing device for representing the space-time evolution of the pore structure of a porous medium and an application method of the testing device. The testing device is characterized in that a permeability test device system comprises a stainless-steel testing tube (1) and 8 samplers (2); the upper end of the stainless-steel testing tube (1) is connected with a grouting pipeline (10) through a flange (4), the grouting pipeline (10) is provided with a stop valve (9), a regulating valve (8) is mounted at the lower end of the stainless-steel testing tube (1), the plurality of fixed and sealed samplers (2) are arranged on the flange (4) at the upper end of the stainless-steel testing tube (1), a filling medium (13) in certain particle size distribution is distributed in the stainless-steel testing tube (1), and a filter screen (7) is arranged at each of the upper end and the lower end of the filling medium (13); a grouting equipment system (12) is connected with the permeability test device system and used for providing grout. The testing device has the advantages that the test piece porosity under different grouting parameters and different time and space conditions is measured to research the space-time evolution of the pore structure of the porous medium, and accordingly the grouting and reinforcing effect is controlled in terms of time and space.
Description
Technical field
The present invention relates to a kind of assay device characterizing the pore structure Spatio-temporal Evolution of rock soil medium during slip casting and side
Method.
Background technology
Along with the high speed development of Chinese national economy, tunnel, highway, the underground engineering construction such as dam and mine like rain after
Spring bamboo, however during building or using gushing water, cave in and depression phenomenon occurs often, these engineering project disaster accidents are made
Substantial amounts of economic loss and casualties are become.
Slurry injection technique, as one of the technical way of harnessing project disaster, its essence is that finger is having coagulating property
Serosity is injected in rock soil medium, makes the porosity of rock soil medium diminish by competent rock soil particle or filling crack, thus
Reach to reinforce the effect of rock soil medium.But, serosity is during injecting rock soil medium, owing to the filtration of rock soil medium is made
With under the physical-chemical reaction of, serosity and rock soil medium and external environment effect so that the pore structure of rock soil medium time
Between and Changing Pattern spatially the most complicated, this easily cause serosity not at specific slip casting time internal diffusion to predetermined district
Or although territory covers predetermined region but causes the fastening strength of rock soil medium not enough owing to density or viscosity diminish
Phenomenon occurs.At present, it is common that determine grouting parameter according to practical experience, such as slurry viscosity, slip casting time and grouting pressure
Deng, if grouting pressure and the slip casting time design too small, serosity can not regulation time in reach design range of grouting (body
In present time effect)；If excessive, although to have reached intended fastening strength, but unreasonable in economic benefit (it is embodied in sky
Between in effect)；If the slurry viscosity chosen is unreasonable, or the physical chemistry of the filtration serosity self due to rock soil medium
Effect causes serosity to inject or fastening strength is not enough (being embodied in time and space usage effect), it can thus be seen that research
Under different grouting parameters, the raising of grouting consolidation effect is had great by the pore structure spatial-temporal evolution pattern of rock soil medium
Meaning.To this end, some scholars expand research, such as: a kind of injecting paste material pressure filter experiment device and test method (China national thereof
Patent of invention, application number: 201510483562.0, publication number: 105092828A), split type layer of sand high-pressure slip-casting simulation experiment
Device (China national patent of invention, application number: 201310613948.X, publication number: 103630654A), but these methods are not
And can spatially embody the development law of porous media pore structure from the time, and have the blindest in operation
Mesh, for shallow layer grouting, if controlling improper meeting to cause rock soil medium surface elevation；For deep layer slip casting, easily occur reaching not
Phenomenon to fastening strength.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of by measuring grouting parameter (grouting pressure, slurry
Fluid viscosity, slip casting time) under, test specimen porosity under different time and steric requirements study porous media during slip casting
The Spatio-temporal Evolution of pore structure, thus realize the hole characterizing porous media from time and the effect spatially controlling grouting and reinforcing
Gap structure Spatio-temporal Evolution assay device.
Second technical problem to be solved by this invention is to provide the pore structure Spatio-temporal Evolution of this sign porous media
The using method of assay device.
In order to solve above-mentioned first technical problem, the pore structure Spatio-temporal Evolution characterizing porous media that the present invention uses
Assay device, including grouting equipment system and infiltration experiment device system；Described infiltration experiment device system includes rustless steel
Test cylinder and 8 samplers；Described rustless steel test cylinder upper end is connected with grouting pipe by flange, described grouting pipe
Being provided with stop valve, described rustless steel test cylinder lower end is installed on regulation valve, the institute of the upper end of described rustless steel test cylinder
The flange stated is provided with the sampler of multiple fixing seal, and the filling being furnished with certain grain size distribution in described rustless steel test cylinder is situated between
Matter, the top and bottom of described filling medium are provided with drainage screen；Described grouting equipment system is by described grouting pipe
Offer serosity is provided with described infiltration experiment device system.
Described sampler by pvc pipe, be located at described pvc pipe upper end close ring set and be located at described closed-loop
The upper connection composition put.
Described upper connection is made by 304 steel thickeied, and structure is that screw thread silk is carved with in outside, and inside is described envelope
Closed loop set；Described pvc pipe uses the PVC cylindrical tube that a diameter of 5cm, length and described rustless steel test cylinder are isometric.
The sidewall of described rustless steel test cylinder is provided with bearing, and described rustless steel test cylinder is rotated by described bearing
It is arranged on bracing frame.
Described filling medium is the porous medium becoming particle diameter distribution utilizing quality fractal dimension principle to constitute.
The outlet of described regulation valve is to being connected to plasticity cup.
In order to solve above-mentioned second technical problem, the pore structure Spatio-temporal Evolution characterizing porous media that the present invention provides
The using method of assay device, comprises the following steps:
Step 1: the serosity of differently configured viscosity, the concrete dynamic modulus assembling different-grain diameter distribution according to quality fractal dimension principle is situated between
Matter i.e. filling medium, places the drainage screen of special pore size distribution in rustless steel test cylinder lower end, fills the porous medium assembled, will
Flange is bolted with rustless steel test cylinder, thus is sealed by porous medium, and each pipeline needed for joint test；
Step 2: close stock inlet and the valve of grout outlet of the pressure pot of grouting equipment system, utilize air compressor machine to pressure
Apply pressure in bucket, and drive the agitator in pressure pot by air compressor machine simultaneously；
Step 3: when the pressure in the pressure pot of grouting equipment system reaches set pressure, opens going out of pressure pot
Stop valve on the grouting pipe of slurry mouth valve and infiltration experiment device system, opens regulation valve, to infiltration experiment device system
Rustless steel test cylinder in porous medium slip casting；
Step 4: arrive the slip casting time interval set, the grout outlet valve of closing presure bucket, utilizes sampler sampling to fill out
Filling medium；
Step 5: repeat step 4, until 8 sampler samplings are complete, measures the porosity of each test specimen afterwards.
In above-mentioned steps 4, sampling process is the upper connection turning on one of them sampler, pvc pipe is rammed filling and is situated between
In matter, then tighten the upper interface of sampler, then repeat process above every the specific time, until 8 samplers
Sampling complete, after whole slip casting process terminates, rotating infiltration experiment device system is level, takes out the sample of sampling,
Each sample cut into the cylinder small specimen of 7 5*5cm and measures its porosity, thus obtaining porosity on room and time
Development law.
In above-mentioned steps 4, sampling process is the upper connection turning on one of them sampler, pvc pipe is rammed filling and is situated between
In matter, then tighten the upper interface of sampler, then repeat process above every the 2min time.
Use the pore structure Spatio-temporal Evolution assay device characterizing porous media and the using method thereof of technique scheme,
It provides the benefit that: the present invention provides a kind of and characterizes the assay device of the pore structure Spatio-temporal Evolution of rock soil medium during slip casting
And method, by measuring under different grouting parameter (grouting pressure, slurry viscosity, slip casting time), different time and steric requirements
Under test specimen porosity study the Spatio-temporal Evolution of porous media pore structure during slip casting, thus realize from time and sky
Control the effect of grouting and reinforcing between, there is automaticity high, easy for installation, operate the features such as faster.
In sum, the present invention be a kind of by measuring under grouting parameter (grouting pressure, slurry viscosity, slip casting time),
Test specimen porosity under different time and steric requirements studies the Spatio-temporal Evolution of porous media pore structure during slip casting,
Thus realize the pore structure Spatio-temporal Evolution test characterizing porous media from time and the effect spatially controlling grouting and reinforcing
Device and using method thereof.
Accompanying drawing explanation
Fig. 1 is the front view of present configuration.
Fig. 2 is the top view of infiltration experiment device of the present invention.
Fig. 3 is the structural map of sampler of the present invention.
Fig. 4 is that test specimen cuts schematic diagram.
Wherein: 1-stainless steel test cylinder, 2-sampler, 3-bearing, 4-flange, 5-bolt, 6-bracing frame, 7-has the end
The drainage screen of seat supports, 8-regulates valve, 9-stop valve, 10-grouting pipe, 11-plasticity cup, and 12-grouting equipment system, 13-fills
Filling out medium, 14-closes ring set, and 15-PVC manages, 16-sampler upper connection.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described
As shown in Fig. 1, Fig. 2 and Fig. 3, characterize the pore structure Spatio-temporal Evolution assay device of porous media, set including slip casting
Standby system 12 and infiltration experiment device system；Infiltration experiment device system includes rustless steel test cylinder 1 and 8 samplers 2；Stainless
Steel test cylinder 1 upper end is connected with grouting pipe 10 by flange 4, and grouting pipe 10 is provided with stop valve 9, rustless steel test cylinder 1
Lower end is installed on regulation valve 8, and the flange 4 of the upper end of rustless steel test cylinder 1 is provided with the sampler 2 of 8 fixing seals, rustless steel
Being furnished with the filling medium 13 of certain grain size distribution in test cylinder 1, the top and bottom of filling medium 13 are provided with drainage screen 7；Slip casting
Device systems 12 is connected offer serosity by grouting pipe 10 with infiltration experiment device system.
Specifically, filling medium 13 is the porous medium becoming particle diameter distribution utilizing quality fractal dimension principle to constitute.
Specifically, sampler 2 by pvc pipe 15, is located at described pvc pipe 15 upper end closing ring set 14 and be located at described
The upper connection 16 closed on ring set 14 form.
Upper connection 16 is made by 304 steel thickeied, and structure is that screw thread silk is carved with in outside, and inside is described closed-loop
Set 14；Described pvc pipe 15 uses the PVC cylindrical tube that a diameter of 5cm, length and described rustless steel test cylinder 1 are isometric.
Further, the sidewall of rustless steel test cylinder 1 is provided with bearing 3, and rustless steel test cylinder 1 is by 3 turns described of bearing
Move and be arranged on bracing frame 6.
As shown in Fig. 1, Fig. 2 and Fig. 3, a kind of characterize the test of the pore structure Spatio-temporal Evolution of rock soil medium during slip casting
Method, specifically includes following steps:
Step 1: the serosity of differently configured viscosity and filling medium, places special pore size distribution in rustless steel test cylinder 1 lower end
Drainage screen 7, fills the filling medium 13 i.e. porous medium assembled, and flange 4 is solid by bolt 5 with rustless steel test cylinder 1
Fixed, thus porous medium is sealed, and each pipeline needed for joint test；
Step 2: poured into by the serosity configured in the pressure pot with agitating function of grouting equipment system 12, closes pressure
The stock inlet of power bucket and the valve of grout outlet, utilized air compressor machine to apply pressure in pressure pot, and driven by air compressor machine simultaneously
Agitator in pressure pot；
Step 3: when the pressure in the pressure pot of grouting equipment system reaches set pressure, opens going out of pressure pot
Stop valve 9 on the grouting pipe 10 of slurry mouth valve and infiltration experiment device system, opens regulation valve 8, to infiltration experiment device
Porous medium slip casting in the rustless steel test cylinder 1 of system；
Step 4: arrive the slip casting time interval set, the grout outlet valve of closing presure bucket, utilizes sampler 2 sampling to fill out
Filling medium；
Step 5: repeat step 4, until 8 samplers 2 sample complete, measure the porosity of each test specimen afterwards.
Wherein, in step 4, sampling process is the upper connection 16 turning on one of them sampler 2, is rammed by pvc pipe 15
In filling medium 13, then tighten the upper interface 16 of sampler 2, on then (generally 2min) repeats every the specific time
The process in face, until 8 samplers 2 sample complete, after whole slip casting process terminates, rotating infiltration experiment device system is water
Level state, takes out the sample of sampling, each sample cuts into the cylinder small specimen of 7 5*5cm and measures its porosity.
The above is only the preferred embodiment of the present invention, it should be pointed out that: one of ordinary skill in the art should be understood that
Without departing from the principles of the invention, those skilled in the art need not some improvements and modifications that creativeness is made, this
A little improvements and modifications are still within protection scope of the present invention.
Claims (9)
1. the pore structure Spatio-temporal Evolution assay device characterizing porous media, it is characterised in that: include grouting equipment system
And infiltration experiment device system (12)；Described infiltration experiment device system includes rustless steel test cylinder (1) and 8 samplers
(2)；Described rustless steel test cylinder (1) upper end is connected with grouting pipe (10) by flange (4), described grouting pipe (10)
Being provided with stop valve (9), described rustless steel test cylinder (1) lower end is installed on regulation valve (8), described rustless steel test cylinder
(1) the described flange (4) of upper end is provided with the sampler (2) of multiple fixing seal, the interior cloth of described rustless steel test cylinder (1)
The filling medium (13) of certain grain size distribution, the top and bottom of described filling medium (13) is had to be provided with drainage screen (7)；Described
Grouting equipment system (12) be connected offer serosity with described infiltration experiment device system by described grouting pipe (10).
The pore structure Spatio-temporal Evolution assay device of sign porous media the most according to claim 1, it is characterised in that: institute
Closing ring set (14) that the sampler (2) stated by pvc pipe (15), is located at described pvc pipe (15) upper end and be located at described
Close upper connection (16) composition on ring set (14).
The pore structure Spatio-temporal Evolution assay device of sign porous media the most according to claim 2, it is characterised in that: institute
The upper connection (16) stated is made by 304 steel thickeied, and structure is that screw thread silk is carved with in outside, and inside is described closing ring set
(14)；Described pvc pipe (15) uses the PVC cylindrical tube that a diameter of 5cm, length and described rustless steel test cylinder (1) are isometric.
The pore structure Spatio-temporal Evolution assay device of sign porous media the most according to claim 1 and 2, its feature exists
In: the sidewall of described rustless steel test cylinder (1) is provided with bearing (3), and described rustless steel test cylinder (1) is by described bearing
(3) it is rotatably installed on bracing frame (6).
The pore structure Spatio-temporal Evolution assay device of sign porous media the most according to claim 1 and 2, its feature exists
In: described filling medium (13) is the porous medium becoming particle diameter distribution utilizing quality fractal dimension principle to constitute.
The pore structure Spatio-temporal Evolution assay device of sign porous media the most according to claim 1 and 2, its feature exists
In: the outlet of described regulation valve (8) is to being connected to plasticity cup (11).
7. the method for the pore structure Spatio-temporal Evolution assay device characterizing porous media described in use claim 1, its feature
It is: comprise the following steps:
Step 1: the serosity of differently configured viscosity, assembles the porous medium of different-grain diameter distribution i.e. according to quality fractal dimension principle
Filling medium, places the drainage screen of special pore size distribution in rustless steel test cylinder lower end, fills the porous medium assembled, by flange
It is bolted with rustless steel test cylinder, thus porous medium is sealed, and each pipeline needed for joint test；
Step 2: close stock inlet and the valve of grout outlet of the pressure pot of grouting equipment system, utilize air compressor machine in pressure pot
Apply pressure, and drive the agitator in pressure pot by air compressor machine simultaneously；
Step 3: when the pressure in the pressure pot of grouting equipment system reaches set pressure, opens the grout outlet of pressure pot
Stop valve on the grouting pipe of valve and infiltration experiment device system, opens regulation valve, to infiltration experiment device system not
Porous medium slip casting in rust steel test cylinder；
Step 4: arrive the slip casting time interval set, the grout outlet valve of closing presure bucket, utilizes sampler sampling to fill and is situated between
Matter；
Step 5: repeat step 4, until 8 sampler samplings are complete, measures the porosity of each test specimen afterwards.
The method using the pore structure Spatio-temporal Evolution assay device characterizing porous media the most according to claim 7, its
Being characterised by: in above-mentioned steps 4, sampling process is the upper connection turning on one of them sampler, pvc pipe is rammed filling and is situated between
In matter, then tighten the upper interface of sampler, then repeat process above every the specific time, until 8 samplers
Sampling complete, after whole slip casting process terminates, rotating infiltration experiment device system is level, takes out the sample of sampling,
Each sample cut into the cylinder small specimen of 7 5*5cm and measures its porosity, thus obtaining porosity on room and time
Development law.
The method using the pore structure Spatio-temporal Evolution assay device characterizing porous media the most according to claim 8, its
Being characterised by: in above-mentioned steps 4, sampling process is the upper connection turning on one of them sampler, pvc pipe is rammed filling and is situated between
In matter, then tighten the upper interface of sampler, then repeat process above every the 2min time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610348335.1A CN106053312B (en) | 2016-05-24 | 2016-05-24 | Characterize the pore structure Spatio-temporal Evolution experimental rig and its application method of porous media |
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| CN201610348335.1A CN106053312B (en) | 2016-05-24 | 2016-05-24 | Characterize the pore structure Spatio-temporal Evolution experimental rig and its application method of porous media |
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| CN106053312B CN106053312B (en) | 2018-06-12 |
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| CN108204935A (en) * | 2018-01-10 | 2018-06-26 | 中南大学 | The experimental provision and experimental method of diffusion pressure microcosmic mechanism during characterization slip casting |
| CN109001078A (en) * | 2018-06-12 | 2018-12-14 | 北京城建道桥建设集团有限公司 | A method of establishing II class cement-based grouting material constitutive relation |
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| Publication number | Publication date |
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| CN106053312B (en) | 2018-06-12 |
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