CN106053312B - Characterize the pore structure Spatio-temporal Evolution experimental rig and its application method of porous media - Google Patents
Characterize the pore structure Spatio-temporal Evolution experimental rig and its application method of porous media Download PDFInfo
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- CN106053312B CN106053312B CN201610348335.1A CN201610348335A CN106053312B CN 106053312 B CN106053312 B CN 106053312B CN 201610348335 A CN201610348335 A CN 201610348335A CN 106053312 B CN106053312 B CN 106053312B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000011148 porous material Substances 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 50
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 36
- 239000010935 stainless steel Substances 0.000 claims abstract description 36
- 238000002474 experimental method Methods 0.000 claims abstract description 25
- 238000007569 slipcasting Methods 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 230000008595 infiltration Effects 0.000 claims abstract description 21
- 238000001764 infiltration Methods 0.000 claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims description 16
- 238000012512 characterization method Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 13
- 239000011440 grout Substances 0.000 claims description 7
- 238000011161 development Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 239000011435 rock Substances 0.000 description 15
- 239000002689 soil Substances 0.000 description 15
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 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
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 201000004569 Blindness Diseases 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
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram 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
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—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 kind of pore structure Spatio-temporal Evolution experimental rig and its application method for characterizing porous media, infiltration experiment device system includes stainless steel test cylinder (1) and 8 samplers (2)；Stainless steel test cylinder (1) upper end is connect by flange (4) with grouting pipe (10), grouting pipe (10) is equipped with shut-off valve (9), stainless steel test cylinder (1) lower end is installed on regulating valve (8), the flange (4) of the upper end of stainless steel test cylinder (1) is equipped with the sampler (2) of multiple fixing seals, the filling medium (13) of certain grain size distribution is furnished in stainless steel test cylinder (1), the top and bottom of filling medium (13) are equipped with filter screen (7)；Grouting equipment system (12) is connect by grouting pipe (10) with infiltration experiment device system provides slurries.For the present invention by measuring under different grouting parameters, test specimen porosity under different time and steric requirements studies the Spatio-temporal Evolution of the porous media pore structure during slip casting, so as to fulfill the effect of grouting and reinforcing from the time and is spatially controlled.
Description
Technical field
The present invention relates to the experimental rig of the pore structure Spatio-temporal Evolution of rock soil medium and sides during a kind of characterization slip casting
Method.
Background technology
With the high speed development of Chinese national economy, tunnel, highway, after the underground engineering constructions such as dam and mine such as rain
Spring bamboo, however during construction or use gushing water, cave in and depression phenomenon occurs often, these engineering project disaster accidents are made
Into a large amount of economic loss and casualties.
One of the technical way of slurry injection technique as harnessing project disaster, its essence is refer to coagulating property
Slurries are injected into rock soil medium, the porosity of rock soil medium are made to become smaller by competent rock soil particle or filling crack, so as to
Have the function that reinforce rock soil medium.However, slurries are during rock soil medium is injected, since the filtration of rock soil medium is made
With under, slurries and the effect of the physical-chemical reaction and external environment of rock soil medium so that the pore structure of rock soil medium when
Between and changing rule spatially it is very complicated, this easily causes slurries and is not diffused into scheduled area within the specific slip casting time
Although domain either covers scheduled region but causes the fastening strength deficiency etc. of rock soil medium since density or viscosity become smaller
Phenomenon occurs.At present, grouting parameter is typically determined according to practical experience, such as slurry viscosity, slip casting time and grouting pressure
Deng, if grouting pressure and the slip casting time design it is too small, slurries cannot reach the range of grouting (body of design before the deadline
In present time effect)；It is unreasonable in economic benefit (to be embodied in sky although having reached expected fastening strength if excessive
Between in effect)；If the slurry viscosity chosen is unreasonable, filtration or slurries itself due to rock soil medium it is physico
Effect causes that slurries can not inject or fastening strength is insufficient (being embodied in time and space usage effect), it can thus be seen that grinding
Study carefully the pore structure spatial-temporal evolution pattern of the rock soil medium under different grouting parameters have to the raising of grouting consolidation effect it is great
Meaning.For this purpose, some scholars expand research, such as：A kind of injecting paste material pressure filter experiment device and its test method (Chinese state
Family's patent of invention, application number：201510483562.0 publication number：105092828A), split type layer of sand high-pressure slip-casting simulation is real
Experiment device (China national patent of invention, application number：201310613948.X publication number：103630654A), but these sides
Method cannot be from the time upper development law with spatially embodiment porous media pore structure, and has in operation apparent
Blindness, for shallow layer grouting, if control is improper to cause rock soil medium surface elevation；For deep layer slip casting, it is susceptible to
The phenomenon that fastening strength is not achieved.
Invention content
First technical problem to be solved by this invention is to provide one kind by measuring grouting parameter (grouting pressure, slurry
Fluid viscosity, slip casting time) under, test specimen porosity under different time and steric requirements study the porous media during slip casting
The Spatio-temporal Evolution of pore structure, so as to fulfill the hole of the characterization porous media of from the time and spatially effect of control grouting and reinforcing
Gap structure Spatio-temporal Evolution experimental rig.
Second technical problem to be solved by this invention is to provide the pore structure Spatio-temporal Evolution of the characterization porous media
The application method of experimental rig.
In order to solve above-mentioned first technical problem, the pore structure Spatio-temporal Evolution of characterization porous media that the present invention uses
Experimental rig, including grouting equipment system and infiltration experiment device system；The infiltration experiment device system includes stainless steel
Test cylinder and 8 samplers；The stainless steel test cylinder upper end is connect by flange with grouting pipe, the grouting pipe
Shut-off valve is equipped with, the stainless steel test cylinder lower end is installed on regulating valve, the institute of the upper end of the stainless steel test cylinder
The flange stated is equipped with the sampler of multiple fixing seals, and the filling that certain grain size distribution is furnished in the stainless steel test cylinder is situated between
Matter, the top and bottom of the filling medium are equipped with filter screen；The grouting equipment system passes through the grouting pipe
It is connect with the infiltration experiment device system and slurries is provided.
The sampler by pvc pipe, be located at the closing ring set of the pvc pipe upper end and the closed-loop described in being located at
Upper connection forms on set.
The upper connection is made by 304 steel thickeied, and structure is carved with screw thread silk for outside, and inside is the envelope
Closed loop set；The pvc pipe is using a diameter of 5cm, length and the isometric PVC cylindrical tubes of the stainless steel test cylinder.
The side wall of the stainless steel test cylinder is equipped with bearing, and the stainless steel test cylinder is rotated by the bearing
On supporting rack.
The filling medium is the porous medium of the change particle diameter distribution formed using quality fractal dimension principle.
The outlet of the regulating valve is to being connected to plasticity cup.
In order to solve above-mentioned second technical problem, the pore structure Spatio-temporal Evolution of characterization porous media provided by the invention
The application method of experimental rig, includes the following steps：
Step 1：The slurries of different viscosities are configured, the concrete dynamic modulus that different-grain diameter distribution is assembled according to quality fractal dimension principle is situated between
Matter, that is, filling medium places the filter screen of special pore size distribution in stainless steel test cylinder lower end, fills the porous medium assembled, will
Flange is bolted with stainless steel test cylinder, so as to seal porous medium, and each pipeline needed for joint test；
Step 2：The stock inlet of pressure pot of grouting equipment system and the valve of grout outlet are closed, using air compressor machine to pressure
Apply pressure in bucket, and pass through the blender in air compressor machine drive pressure pot simultaneously；
Step 3：When the pressure in the pressure pot of grouting equipment system reaches set pressure, Opening pressure bucket goes out
The shut-off valve on mouth valve and the grouting pipe of infiltration experiment device system is starched, regulating valve is opened, to infiltration experiment device system
Stainless steel test cylinder in porous medium slip casting；
Step 4：The slip casting time interval of setting is reached, closes the grout outlet valve of pressure pot, is filled out using sampler sampling
Filling medium；
Step 5：Step 4 is repeated, until 8 sampler samplings finish, measures the porosity of each test specimen later.
In above-mentioned steps 4, sampling process is to unscrew the upper connection of one of sampler, and pvc pipe is rammed into filling is situated between
In matter, the upper interface of sampler is then tightened, then process above is repeated every the specific time, until 8 samplers
Sampling finishes, and after treating entire slip casting process, rotation infiltration experiment device system is horizontality, takes out the sample of sampling,
Each sample is cut into the cylinder small specimen of 7 5*5cm and measures its porosity, so as to obtain porosity on room and time
Development law.
In above-mentioned steps 4, sampling process is to unscrew the upper connection of one of sampler, and pvc pipe is rammed into filling is situated between
In matter, the upper interface of sampler is then tightened, then repeats process above every the 2min times.
Using above-mentioned technical proposal characterization porous media pore structure Spatio-temporal Evolution experimental rig and its application method,
Advantage is：The experimental rig of the pore structure Spatio-temporal Evolution of rock soil medium during a kind of characterization slip casting of present invention offer
And method, by measuring under different grouting parameters (grouting pressure, slurry viscosity, slip casting time), different time and steric requirements
Under test specimen porosity study the Spatio-temporal Evolution of the porous media pore structure during slip casting, so as to fulfill from time and sky
Between upper control grouting and reinforcing effect, there is high degree of automation, it is easy for installation, operate the features such as faster.
In conclusion the present invention be one kind 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 the porous media pore structure during slip casting,
So as to fulfill the pore structure Spatio-temporal Evolution experiment of the characterization porous media of from the time and spatially effect of control grouting and reinforcing
Device and its application method.
Description of the drawings
Fig. 1 is the front view of structure of the present invention.
Fig. 2 is the vertical view of infiltration experiment device of the present invention.
Fig. 3 is the structural map of sampler of the present invention.
Fig. 4 is test specimen cutting schematic diagram.
Wherein：1- stainless steel test cylinders, 2- samplers, 3- bearings, 4- flanges, 5- bolts, 6- supporting racks, 7- have bottom
The filter screen of seat supports, 8- regulating valves, 9- shut-off valves, 10- grouting pipes, 11- plasticity cups, 12- grouting equipment systems, 13- fill
Fill out medium, 14- closing ring sets, 15-PVC pipes, 16- sampler upper connections.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings
As shown in Fig. 1, Fig. 2 and Fig. 3, the pore structure Spatio-temporal Evolution experimental rig of porous media is characterized, is set including slip casting
Standby system 12 and infiltration experiment device system；Infiltration experiment device system includes stainless steel test cylinder 1 and 8 samplers 2；It is stainless
1 upper end of steel test cylinder is connect by flange 4 with grouting pipe 10, and grouting pipe 10 is equipped with shut-off valve 9, stainless steel test cylinder 1
Lower end is installed on regulating valve 8, and the flange 4 of the upper end of stainless steel test cylinder 1 is equipped with the sampler 2 of 8 fixing seals, stainless
The filling medium 13 of certain grain size distribution is furnished in steel test cylinder 1, the top and bottom of filling medium 13 are equipped with filter screen 7；Note
Slurry device systems 12 are connect by grouting pipe 10 with infiltration experiment device system provides slurries.
Specifically, filling medium 13 is the porous medium of the change particle diameter distribution formed using quality fractal dimension principle.
Specifically, sampler 2 by pvc pipe 15, be located at the closing ring set 14 of 15 upper end of pvc pipe and be located at described
Closing ring set 14 on upper connection 16 form.
Upper connection 16 is made by 304 steel thickeied, and structure is carved with screw thread silk for outside, and inside is the closed-loop
Set 14；The pvc pipe 15 is using a diameter of 5cm, length and the isometric PVC cylindrical tubes of the stainless steel test cylinder 1.
Further, the side wall of stainless steel test cylinder 1 is equipped with bearing 3, and stainless steel test cylinder 1 passes through 3 turns of the bearing
It is dynamic to be mounted on supporting rack 6.
As shown in Fig. 1, Fig. 2 and Fig. 3, the experiment of the pore structure Spatio-temporal Evolution of rock soil medium during a kind of characterization slip casting
Method specifically comprises the following steps：
Step 1：The slurries and filling medium of different viscosities are configured, special pore size distribution is placed in 1 lower end of stainless steel test cylinder
Filter screen 7 fills the filling medium 13 i.e. porous medium assembled, flange 4 is consolidated with stainless steel test cylinder 1 by bolt 5
It is fixed, so as to porous medium be sealed, and each pipeline needed for joint test；
Step 2：The slurries being configured are poured into the pressure pot with agitating function of grouting equipment system 12, close pressure
The stock inlet of power bucket and the valve of grout outlet apply pressure into pressure pot, and driven simultaneously by air compressor machine using air compressor machine
Blender in pressure pot；
Step 3：When the pressure in the pressure pot of grouting equipment system reaches set pressure, Opening pressure bucket goes out
The shut-off valve 9 on mouth valve and the grouting pipe 10 of infiltration experiment device system is starched, regulating valve 8 is opened, to infiltration experiment device
Porous medium slip casting in the stainless steel test cylinder 1 of system；
Step 4：The slip casting time interval of setting is reached, closes the grout outlet valve of pressure pot, is filled out using the sampling of sampler 2
Filling medium；
Step 5：Step 4 is repeated, until 8 samplings of sampler 2 finish, measures the porosity of each test specimen later.
Wherein, in step 4, sampling process is to unscrew the upper connection 16 of one of sampler 2, and pvc pipe 15 is rammed into
In filling medium 13, the upper interface 16 of sampler 2 is then tightened, is then repeated every the specific time (generally 2min)
Process above is finished until 8 samplers 2 sample, and after treating entire slip casting process, rotates infiltration experiment device system
For horizontality, the sample of sampling is taken out, each sample is cut 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：Those skilled in the art should understand that
Without departing from the principles of the invention, those skilled in the art does not need to the creative several improvements and modifications made, this
A little improvements and modifications are still within protection scope of the present invention.
Claims (6)
1. a kind of pore structure Spatio-temporal Evolution experimental rig for characterizing porous media, it is characterised in that：Including grouting equipment system
(12) and infiltration experiment device system；The infiltration experiment device system includes stainless steel test cylinder (1) and 8 samplers
(2)；Stainless steel test cylinder (1) upper end is connect by flange (4) with grouting pipe (10), the grouting pipe (10)
Shut-off valve (9) is equipped with, described stainless steel test cylinder (1) lower end is installed on regulating valve (8), the stainless steel test cylinder
(1) flange (4) of upper end is equipped with the sampler (2) of multiple fixing seals, the interior cloth of the stainless steel test cylinder (1)
There is the filling medium (13) of certain grain size distribution, the top and bottom of the filling medium (13) are equipped with filter screen (7)；It is described
Grouting equipment system (12) connect by the grouting pipe (10) with the infiltration experiment device system provide slurries,
The sampler (2) by pvc pipe (15), be located at the closing ring set (14) of described pvc pipe (15) upper end and be located at described
Closing ring set (14) on upper connection (16) composition, the upper connection (16) makes by 304 steel that thicken, structure
Screw thread silk is carved with for outside, inside is the closing ring set (14)；The pvc pipe (15) using a diameter of 5cm, length with
The isometric PVC cylindrical tubes of the stainless steel test cylinder (1), the side wall of the stainless steel test cylinder (1) are equipped with bearing (3),
The stainless steel test cylinder (1) is rotatably installed in by the bearing (3) on supporting rack (6).
2. the pore structure Spatio-temporal Evolution experimental rig of characterization porous media according to claim 1, it is characterised in that：Institute
The filling medium (13) stated is the porous medium of the change particle diameter distribution formed using quality fractal dimension principle.
3. the pore structure Spatio-temporal Evolution experimental rig of characterization porous media according to claim 1 or 2, feature exist
In：The outlet of the regulating valve (8) is to being connected to plasticity cup (11).
4. the application method of the pore structure Spatio-temporal Evolution experimental rig of characterization porous media according to claim 1,
It is characterized in that：Include the following steps：
Step 1：The slurries of different viscosities are configured, the porous medium of different-grain diameter distribution is assembled i.e. according to quality fractal dimension principle
Filling medium places the filter screen of special pore size distribution in stainless steel test cylinder lower end, the porous medium assembled is filled, by flange
It is bolted with stainless steel test cylinder, so as to seal porous medium, and each pipeline needed for joint test；
Step 2：The stock inlet of pressure pot of grouting equipment system and the valve of grout outlet are closed, using air compressor machine into pressure pot
Apply pressure, and pass through the blender in air compressor machine drive pressure pot simultaneously；
Step 3：When the pressure in the pressure pot of grouting equipment system reaches set pressure, the grout outlet of Opening pressure bucket
Shut-off valve on valve and the grouting pipe of infiltration experiment device system opens regulating valve, to infiltration experiment device system not
The porous medium slip casting become rusty in steel test cylinder；
Step 4：The slip casting time interval of setting is reached, closes the grout outlet valve of pressure pot, sampling filling using sampler is situated between
Matter；
Step 5：Step 4 is repeated, until 8 sampler samplings finish, measures the porosity of each test specimen later.
5. the application method of the pore structure Spatio-temporal Evolution experimental rig of characterization porous media according to claim 4,
It is characterized in that：In above-mentioned steps 4, sampling process is to unscrew the upper connection of one of sampler, and pvc pipe is rammed into filling is situated between
In matter, the upper interface of sampler is then tightened, then process above is repeated every the specific time, until 8 samplers
Sampling finishes, and after treating entire slip casting process, rotation infiltration experiment device system is horizontality, takes out the sample of sampling,
Each sample is cut into the cylinder small specimen of 7 5*5cm and measures its porosity, so as to obtain porosity on room and time
Development law.
6. the application method of the pore structure Spatio-temporal Evolution experimental rig of characterization porous media according to claim 5,
It is characterized in that：In above-mentioned steps 4, sampling process is to unscrew the upper connection of one of sampler, and pvc pipe is rammed into filling is situated between
In matter, the upper interface of sampler is then tightened, then repeats process above every the 2min times.
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| CN108062789B (en) * | 2017-12-20 | 2021-06-01 | 中国石油天然气股份有限公司 | Core sample selection method and device |
| 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 |
| CN109001078B (en) * | 2018-06-12 | 2021-02-09 | 北京城建道桥建设集团有限公司 | Method for establishing constitutive relation of II-type cement-based grouting material |
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| CN103267722A (en) * | 2013-05-07 | 2013-08-28 | 中国矿业大学 | Pressure bearing permeation grouting strengthening test apparatus and method |
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| CN105527384A (en) * | 2016-01-15 | 2016-04-27 | 山东大学 | Grouting simulating test device and test method thereof |
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| US6666068B2 (en) * | 2001-09-25 | 2003-12-23 | Pertect Detectors, Inc. | Vapor trap system and associated method for detecting volatile organic chemical vapors |
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|---|---|---|---|---|
| CN101799386A (en) * | 2009-12-25 | 2010-08-11 | 福州大学 | Testing device and testing method for engineering mechanical properties of falling rock backfill |
| CN101893617A (en) * | 2010-06-24 | 2010-11-24 | 同济大学 | Tester for testing discount rule of water pressure of grouting circle of anti-water pressure emission-limit tunnel |
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