CN107703031B - A kind of air pressure driving loose media grouting simulation test device and test method - Google Patents
A kind of air pressure driving loose media grouting simulation test device and test method Download PDFInfo
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- CN107703031B CN107703031B CN201711190560.8A CN201711190560A CN107703031B CN 107703031 B CN107703031 B CN 107703031B CN 201711190560 A CN201711190560 A CN 201711190560A CN 107703031 B CN107703031 B CN 107703031B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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Abstract
The invention discloses a kind of air pressure driving loose media grouting simulation test devices and test method, slip casting platform subsystem to be made of top sealing cover, middle part tubular slip casting main platform body and pedestal；Air pressure subsystem provides grouting pressure by air compressor, and air pressure subsystem is connect by high pressure gas pipeline with slip casting platform subsystem；Monitoring system mainly includes monitoring host, baroceptor, hydrostatic sensor and weighing sensor.The present invention simulates live ground stress environment by filling, compacting pourable body, and the release after being compacted can simulate the actual conditions of side unloading, sealing cover and pedestal are dismantled after the completion of slip casting, after the loose media that bottom is not exposed to slurries loosens, measuring test with the length of loose media upper surface to lower surface by the general measures tool such as ruler is slip casting radius.Slurries diffusion length can be obtained before capable of constructing at the scene, and laboratory environment locating for test process is relatively stable, obtained result has directive significance to actual engineering design.
Description
Technical field
The present invention relates to a kind of air pressure driving loose media grouting simulation test device and test methods, are suitable for laboratory mould
The slip casting process of loose media unilateral side unloading condition under quasi- differently stress condition.
Background technique
Grouting and reinforcing loose media is ground, common problem in mining engineering practice.At the scene in practice process, determine not
It is particularly significant for instructing engineering design and construction with grout spreading range under stress condition.During site operation, slip casting is more
It is that tunnel (tunnel) wall surface unloaded in side carries out, belongs to side unloading problem.In conjunction with spherical diffusion theory, slip casting is minimum
Radius is bottom hole direction, instruct grouting design using direction slurries diffusion length as slip casting radius and construction is have it is scientific according to
According to, however determine that slurries diffusion length lags behind grouting design by field test, and live tunnel (tunnel) is enclosed
Rock mass is influenced by tectonic movement and Engineering Disturbance, has apparent inhomogeneities, it is real that obtained test result tends not to guidance
Border engineering design, so, the environment of true reappearance slip casting indoors is of great significance for loose media grouting design with construction.
In order to provide guidance to actual engineering design, there are some laboratory simulation devices at present, but these devices are most
Using filling grouting test, if 103267722 A of Chinese patent CN discloses a kind of pressure-bearing osmotic grouting strengthened test device,
The device is made of slip casting cylinder, slurries storage device, manual slip casting pressurizing device, the device can slip casting, the complete sample of production,
But slip casting process is comparatively laborious, device cleaning is difficult, can not simulate true side unloading slip casting ground stress environment, cannot achieve
The monitoring of slurries Diffusion Law, and can not quickly and easily measure slip casting radius.
Summary of the invention
In view of the above-mentioned problems of the prior art, ground stress environment, mould can be reappeared the object of the present invention is to provide a kind of
Intend true side unloading slip casting, the air pressure drive realized the monitoring of slurries Diffusion Law, accurate slip casting radius can be quickly obtained
Dynamic loose media grouting simulation test device；Another object of the present invention is to provide it is a kind of it is easily operated, being capable of real simulation one
Side dumping carries ground stress environment, and obtained test result there is the air pressure of directive significance to drive loose media slip casting actual engineering design
Simulation experiment method.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of air pressure drives loose media grouting simulation test
Device, including slip casting platform subsystem, air pressure subsystem and monitoring system；Slip casting platform subsystem includes tubular slip casting platform master
Body, tubular slip casting main platform body bottom end are fixed with a bottom by the bolt of lower base being circumferentially arranged around tubular slip casting main platform body
Seat, tubular slip casting main platform body top are equipped with sealing cover, and the sealing cover is sealed in tubular by circumferential screw thread and O-ring seals
Slip casting main platform body top, the tubular slip casting main platform body top side are equipped with feed liquor funnel；The air pressure subsystem includes
The outlet of air compressor, air compressor is connect with one end of a high pressure gas pipeline, and the other end of high pressure gas pipeline passes through close
Tubular slip casting main platform body is covered and protrudes into, air compressor is equipped with relief valve；
The monitoring system includes baroceptor, hydrostatic sensor, weighing sensor and monitoring host, the air pressure transmission
Sensor is located at air compressor gas outlet, and there are four hydrostatic sensors, is evenly arranged in tubular slip casting main platform body from top to bottom
On the installation interface of side wall, the hydrostatic sensor mounting height of the top and the high line of granular media in the middle part of tubular slip casting main platform body are put down
Together, and adjacent hydrostatic sensor spacing is 100mm；Weighing sensor is located at base center, and around weighing sensor on pedestal
Four fluid holes are distributed with, monitoring host is located at tubular slip casting main platform body periphery, the baroceptor, hydraulic sensing
Device, weighing sensor pass through data transmission link respectively and connect with monitoring host.
Preferably, the size of the tubular slip casting main platform body is Φ 120mm × 480mm, wall thickness 15mm, is used
Such size can guarantee not generating obvious deformation under the stress condition of 20MPa.
Preferably, the highest liquid level of feed liquor funnel is concordant with the slurries high limit on tubular slip casting main platform body top, guarantees cylinder
There are compressed gas spaces on shape slip casting main platform body top.
Preferably, the diameter of the high pressure gas pipeline is 6mm.
Preferably, the hydrostatic sensor of top is apart from tubular slip casting main platform body top 120mm.
Preferably, the base inner diameter 200mm, wall thickness 20mm, the diameter of weighing sensor are 100mm.
The present invention also provides a kind of air pressures to drive loose media grouting simulation test method, includes the following steps:
(1) slip casting platform assembles: tubular slip casting main platform body and pedestal being fixed by bolt of lower base, tubular slip casting is put down
The hydrostatic sensor installation interface of platform main body is blocked with plug screw, is formed the column granular media having a size of Φ 120mm × 480mm and is compacted sky
Between；
(2) practical driving face loose media size grading, and field measurement vertical stress loose media padding and compacting: are determined
σ1, the test for meeting actual particle size gradation is filled into tubular slip casting main platform body with loose media, and use the test of filling
The compacting body of rod is placed in by loose media upper flat above tubular slip casting main platform body, in the press machine being connected with the compacting body of rod
Pressurization under test detected that stress level is σ with the weighing sensor that loose media is densified to pedestal1, pressure stabilizing 5min,
Loose media after compacting is following in granular media high limit；The compacting body of rod is removed, the item for unloading the test loose media of compacting at top
Dilatancy under part aggravates granular media expansion by tapping compacting pourable body top position wall surface, simulates scene unloading rear surface
Different degrees of destruction；
(3) slip casting subsystem seals: the sealing cover connecting with high pressure gas pipeline being tightened, by circumferential screw thread and O-shaped close
Seal seals slip casting subsystem；
(4) it installs monitoring sensor: removing plug screw, hydrostatic sensor is successively installed on each installation interface, open prison
Host is surveyed, determination can obtain the detection data of hydrostatic sensor, baroceptor and weighing sensor；
(5) slurries input: opening relief valve, test loose media upper space is made to pass through high pressure gas pipeline and the external world even
It is logical, slurries are input to by slip casting subsystem upper space, final slurries liquid level and feed liquor funnel edge by feed liquor funnel
Concordantly, or it is lower than feed liquor funnel edge, closes the switch valve of feed liquor funnel, and seal feed liquor funnel；
(6) air pressure pulp injection: closing relief valve, opens air compressor, adjusts the grouting pressure of air compressor to 0.7-
1.0MPa simulates live mine slip casting, forms hyperbaric environment between slurries liquid level and sealing cover at this time, at this time the liquid of the top
The hydraulic numerical value that pressure sensor detects is identical as the grouting pressure of air compressor, illustrates that grouting pressure can be transmitted steadily
Into slurries, pressure stabilizing slip casting is realized；
(7) stop the judgement of slip casting time: each hydrostatic sensor detection pressure inside test loose media is no longer sent out
When the grouting pressure of changing, baroceptor detection stablizes constant, then pressure stabilizing 3min closes air compressor, stops slip casting,
The seepage distance of slurries is slurries slip casting radius reference value at this time；
(8) sampling analysis obtains slip casting radius: removing hydrostatic sensor, dismantles sealing cover and pedestal, bottom do not contact
To slurries loose media loosen after, by the general measures tool such as ruler measurement test loose media upper surface to lower surface length
Degree is slip casting radius；Uniaxial compression test analysis is carried out after test after slip casting is infiltrated with loose media, then by ruler etc.
General measure tool carries out the positioning of slurries spreading morphology, the accurate grout spreading range for determining loose media；
(9) slip casting platform subsystem cleans: pourable medium after remaining slurries, slip casting being cleaned out, cleaning slip casting is flat
Station subsystem, in case next time uses.
Compared with the existing technology, the present invention has the advantage that
1. the present invention simulates live ground stress environment by filling, compacting pourable body, stress value directly passes through weighing and sensing
Device determines；Differently stress levels can be simulated, and the release after compacting can simulate one side dumping of live tunnel (tunnel) wall surface
The actual conditions of load, thus accurate reproduction engineering site ambient stress；It can detecte by hydrostatic sensor and understand slurries diffusion
Rule, to be beneficial to the research to slurries diffusion process；
2. sealing cover and pedestal are dismantled after the completion of slip casting, after the loose media that bottom is not exposed to slurries loosens, by straight
It is slip casting radius that the general measures tool such as ruler, which measures test with the length of loose media upper surface to lower surface,；By the examination after slip casting
It tests after being infiltrated with loose media and carries out uniaxial compression test analysis, and can be positioned by the general measures such as ruler tool and know slurries
Whole spreading morphology；
3. test method of the invention solves the problems, such as that loose mass ground stress applies difficulty or simulation similarity is low, energy
Enough preferable simulation field engineering conditions largely simplify laboratory simulation test step.It as the result is shown can be to slurries
Diffusion process real-time monitoring can obtain slurries diffusion length, and laboratory ring locating for test process before constructing at the scene
Border is relatively stable, and obtained test result has directive significance to actual engineering design.
Detailed description of the invention
Fig. 1 is loose media osmotic grouting simulation test device overall schematic；
Fig. 2 is sealing principle figure at the top of slip casting platform subsystem；
Fig. 3 schematic diagram of base structure；
Fig. 4 is the experiment process figure of grouting simulation test method.
In figure: 1, tubular slip casting main platform body；2, pedestal；3, bolt of lower base；4, feed liquor funnel；5, switch valve；6, it seals
Lid；7, plug screw；8, it is compacted the body of rod；9, loose media is used in test；10, granular media height limits；11, slurries；12, slurries height limits；13, air pressure
Contracting machine；14, baroceptor；15, relief valve；16, high pressure gas pipeline；17, host is monitored；18, hydrostatic sensor；19, it weighs
Sensor；20, data transmission link；21, circumferential screw thread；22, O-ring seal.
Specific embodiment
Below with reference to embodiment, invention is further described in detail.
As shown, a kind of air pressure drives loose media grouting simulation test device, including slip casting platform subsystem and air pressure
Subsystem；Slip casting platform subsystem includes tubular slip casting main platform body 1, and 1 bottom end of tubular slip casting main platform body passes through around tubular
The bolt of lower base 3 that slip casting main platform body 1 is circumferentially arranged is fixed with a pedestal 2, is equipped with sealing cover at the top of tubular slip casting main platform body 1
6, the sealing cover 6 passes through circumferential screw thread 21 and O-ring seals 22 are sealed in 1 top of tubular slip casting main platform body, the tubular
1 top side of slip casting main platform body is equipped with feed liquor funnel 4；The air pressure subsystem includes air compressor 13, air compressor
13 outlet is connect with one end of a high pressure gas pipeline 16, and the other end of high pressure gas pipeline 16 passes through sealing cover 6 and protrudes into tubular
Slip casting main platform body 1, air compressor 13 are equipped with relief valve 15, and opening relief valve 15 after the end of the experiment can let out safely
Pressure；
The monitoring system includes baroceptor 14, hydrostatic sensor 18, weighing sensor 19 and monitoring host 17, institute
It states baroceptor 14 and is located at 13 gas outlet of air compressor, there are four hydrostatic sensors 18, is evenly arranged in cylinder from top to bottom
On the installation interface of 1 side wall of shape slip casting main platform body, 18 mounting height of hydrostatic sensor of the top and tubular slip casting platform master
The high line 10 of the granular media at 1 middle part of body is concordant, and 18 spacing of adjacent hydrostatic sensor is 100mm；Weighing sensor 19 is located in pedestal 2
The heart, and four fluid holes are distributed with around weighing sensor 19 on pedestal 2, monitoring host 17 is located at tubular slip casting main platform body
1 periphery, the baroceptor 14, hydrostatic sensor 18, weighing sensor 19 pass through data transmission link 20 and monitoring respectively
Host 17 connects.
Sealing cover 6, tubular slip casting main platform body 1 and 2 three parts of pedestal of the invention surround granular media compacting and slurries storage
Space.The hydraulic data that hydrostatic sensor 18 monitors is transferred to monitoring host 17 by data transmission link 20, realizes tubular note
The real-time acquisition of 1 internal hydraulic pressure data of main platform body is starched, weighing sensor 19 directly obtains compacting pourable body 9 and acts on its top
Stress, and reach monitoring host 17 in real time obtain stress data.13 pressure adjustable of air compressor, stability are good, and highest is steady
Pressure energy enough reaches 1MPa, is equipped with baroceptor 14 and relief valve 15, the compressed air pressure that baroceptor 14 obtains in real time
It can reach in real time in monitoring host 17, it after the end of the experiment can be to 13 safety relief of air compressor by relief valve 15.
Preferably, the size of the tubular slip casting main platform body 1 is Φ 120mm × 480mm, and wall thickness 15mm is adopted
It can be guaranteed not generating obvious deformation under the stress condition of 20MPa with such size.
Preferably, the highest liquid level of feed liquor funnel 4 is concordant with the slurries height on 1 top of tubular slip casting main platform body limit 12, protects
Demonstrate,proving 1 top of tubular slip casting main platform body, there are compressed gas spaces.
Preferably, the diameter of the high pressure gas pipeline 16 is 6mm.
Preferably, the hydrostatic sensor 18 of top is apart from 1 top 120mm of tubular slip casting main platform body.
Preferably, the 2 internal diameter 200mm of pedestal, wall thickness 20mm, the diameter of weighing sensor 19 are 100mm.
Air pressure by taking loose coal grouting simulation test as an example drives loose media grouting simulation test method, including walks as follows
It is rapid:
(1) slip casting platform assembles.Tubular slip casting main platform body 1 and pedestal 2 is fixed by bolt of lower base 3, tubular is infused
The hydrostatic sensor 18 of slurry main platform body 1 is installed interface plug screw 7 and is blocked, and is formed having a size of Φ 120mm × 480mm column granular media
Compaction space.
(2) loose coal filling, compacting.Determine that practical roadway head loose coal size grading is as shown in table 1,
Field measurement vertical stress σ1For 10MPa, the test loose media 9 for meeting size grading is filled into tubular slip casting main platform body
In 1, and make fill loose media upper flat, will compacting the body of rod 8 be placed in above tubular slip casting main platform body 1, with compaction rod
The weighing sensor 19 that test loose media 9 is densified to pedestal 2 is detected into stress under the pressurization of the connected press machine of body 8
Level is 10MPa, pressure stabilizing 5min, and the loose media after compacting limits 10 or less in granular media height；The compacting body of rod 8 is removed, the examination of compacting is made
It tests and uses dilatancy under conditions of top unloads of loose media 9, it may be necessary to pass through and tap compaction test 9 top of loose media
Position wall surface expands to aggravate granular media, simulates the different degrees of destruction situation of scene unloading rear surface；
1 driving face loose coal size grading of table
(3) slip casting subsystem seals.The sealing cover 6 connecting with high pressure gas pipeline 16 is tightened, by circumferential screw thread 21 and O
Type sealing ring 22 seals slip casting subsystem.
(4) monitoring sensor is installed.Plug screw 7 is removed, hydrostatic sensor 18 is successively installed on each installation interface, is opened
Host 17 is monitored, is determined to obtain the detection data of hydrostatic sensor 18, baroceptor 14 and weighing sensor 19.
(5) slurries input.Relief valve 15 is opened, 9 upper space of test loose media is made to pass through high pressure gas pipeline 16 and outer
Slurries 11 are input to slip casting subsystem upper space by feed liquor funnel 4, slurries 11 use the ratio of mud for 1:1's by boundary's connection
Cement grout, cement are 1250 mesh superfine cements.11 liquid level of slurries is preferably concordant with 4 edge of feed liquor funnel, or slightly low
In the edge of feed liquor funnel 4, and the slurries 11 in tubular slip casting main platform body 1 are no more than slurries high limit 12, guarantee tubular slip casting
There are the spaces of compressed gas on main platform body 1 top, close the switch valve 5 of feed liquor funnel 4, and seal feed liquor funnel 4.
(6) air pressure pulp injection.Relief valve 15 is closed, air compressor 13 is opened, adjusts the grouting pressure of air compressor 13
Live mine slip casting is simulated for 0.7MPa, forms hyperbaric environment between 11 ullage of slurries and sealing cover 6 at this time, at this time most
The hydraulic numerical value that the hydrostatic sensor 18 of top detects is 0.7MPa, illustrates that grouting pressure can steadily be transmitted to slurries 11
In, pressure stabilizing slip casting may be implemented at this time；
(7) stop the judgement of slip casting time.Hydrostatic sensor 18 inside test loose media 9 detects pressure and no longer occurs
Variation, the grouting pressure that baroceptor 14 detects are stablized in 0.7MPa, then air compressor 13 is closed after pressure stabilizing 3min, stop
Only slip casting, the seepage distance of slurries may act as slurries slip casting radius reference value at this time.This time is tested due to compacting pourable body 9
Compactness is good, and the property infused is poor, and for a hydrostatic sensor 18 of bottommost without hydraulic registration, slurries diffusion length is less than 300mm,
Also indicate that the property infused of superfine cement slurries is poor.
(8) sampling analysis.Each hydrostatic sensor 18 is removed, sealing cover 6 and pedestal 2 are dismantled, the test after slip casting is used
Uniaxial compression test analysis is carried out after loose media 9 is unbearable, then is carried out slurries spreading morphology by the general measures tool such as ruler and determined
Position, determining that test uses the grout spreading range of superfine cement slip casting with loose media 9 is about 220mm, with note when practice of construction
Radius is starched substantially without error, and there are apparent percolation phenomenas.
(9) slip casting platform subsystem cleans.Pourable medium after superfine cement slurries, slip casting is cleaned out, slip casting is cleaned
Platform subsystem, in case next time uses.
Claims (7)
1. a kind of air pressure drives loose media grouting simulation test device, which is characterized in that including slip casting platform subsystem, air pressure
System and monitoring system；Slip casting platform subsystem includes tubular slip casting main platform body (1), tubular slip casting main platform body (1) bottom end
It is fixed with a pedestal (2) by the bolt of lower base (3) being circumferentially arranged around tubular slip casting main platform body (1), tubular slip casting platform
Sealing cover (6) are equipped at the top of main body (1), the sealing cover (6) passes through circumferential screw thread (21) and O-ring seals (22) are sealed in cylinder
Shape slip casting main platform body (1) top, tubular slip casting main platform body (1) the top side are equipped with feed liquor funnel (4)；The air pressure
Subsystem includes air compressor (13), and the outlet of air compressor (13) is connect with one end of a high pressure gas pipeline (16), high
The other end of pressure appendix (16) passes through sealing cover (6) and protrudes into tubular slip casting main platform body (1), and air compressor is set on (13)
There are relief valve (15)；
The monitoring system includes baroceptor (14), hydrostatic sensor (18), weighing sensor (19) and monitoring host
(17), the baroceptor (14) is located at air compressor (13) gas outlet, and there are four hydrostatic sensors (18), from top to bottom
It is evenly arranged on the installation interface of tubular slip casting main platform body (1) side wall, hydrostatic sensor (18) mounting height of the top
It is concordant with granular media high line (10) in the middle part of tubular slip casting main platform body (1), and adjacent hydrostatic sensor (18) spacing is 100mm；
Weighing sensor (19) is located at pedestal (2) center, and is distributed with four around weighing sensor (19) on pedestal (2) and goes out liquid
Hole, monitoring host (17) be located at tubular slip casting main platform body (1) periphery, the baroceptor (14), hydrostatic sensor (18),
Weighing sensor (19) is connect by data transmission link (20) with monitoring host (17) respectively.
2. air pressure according to claim 1 drives loose media grouting simulation test device, which is characterized in that the tubular note
The size for starching main platform body (1) is Φ 120mm × 480mm, wall thickness 15mm.
3. air pressure according to claim 1 drives loose media grouting simulation test device, which is characterized in that the feed liquor leakage
The highest liquid level of bucket 4 is concordant with the slurries height on tubular slip casting main platform body (1) top limit (12).
4. air pressure according to claim 1 drives loose media grouting simulation test device, which is characterized in that the high pressure is defeated
The diameter of tracheae (16) is 6mm.
5. air pressure according to claim 1 drives loose media grouting simulation test device, which is characterized in that the liquid of top
Pressure sensor (18) is apart from tubular slip casting main platform body (1) top 120mm.
6. air pressure according to claim 1 drives loose media grouting simulation test device, which is characterized in that the pedestal
(2) internal diameter 200mm, wall thickness 20mm, weighing sensor (19) diameter 100mm.
7. a kind of air pressure using any air pressure driving loose media grouting simulation test device of claim 1-6 drives pine
Granular media grouting simulation test method, which comprises the steps of:
(1) slip casting platform assembles: tubular slip casting main platform body (1) and pedestal (2) is fixed by bolt of lower base (3), by tubular
Hydrostatic sensor (18) the installation interface of slip casting main platform body (1) is blocked with plug screw (7), is formed having a size of Φ 120mm × 480mm
Column granular media compaction space；
(2) practical driving face loose media size grading, and field measurement vertical stress σ loose media padding and compacting: are determined1, will
The test for meeting actual particle size gradation is filled into tubular slip casting main platform body (1) with loose media (9), and uses the test of filling
The compacting body of rod (8) is placed in above the tubular slip casting main platform body (1) by loose media (9) upper flat, with the compacting body of rod (8)
Test is detected with the weighing sensor (19) that loose media (9) is densified to pedestal (2) under the pressurization of connected press machine
Stress level is σ1, pressure stabilizing 5min, loose media after compacting granular media high limit (10) below；The compacting body of rod (8) is removed, makes to be compacted
Test with loose media (9) top unload under conditions of dilatancy, pass through tap compacting pourable body (9) top position wall surface
To aggravate granular media expansion, the different degrees of destruction of simulation scene unloading rear surface；
(3) slip casting subsystem seals: the sealing cover (6) connecting with high pressure gas pipeline (16) being tightened, by circumferential screw thread (21)
Slip casting subsystem is sealed with O-ring seal (22)；
(4) it installs monitoring sensor: removing plug screw (7), hydrostatic sensor (18) successively are installed on each installation interface, open
It monitors host (17), determination can obtain the detection of hydrostatic sensor (18), baroceptor (14) and weighing sensor (19)
Data；
(5) slurries input: open relief valve (15), make test loose media (9) upper space by high pressure gas pipeline (16) with
Slurries (11) are input to slip casting subsystem upper space by feed liquor funnel (4) by external world's connection, and final slurries (11) liquid level is high
Degree is concordant with feed liquor funnel (4) edge, or is lower than feed liquor funnel (4) edge, closes the switch valve (5) of feed liquor funnel (4), and
It seals feed liquor funnel (4)；
(6) air pressure pulp injection: closing relief valve (15), opens air compressor (13), adjusts the slip casting pressure of air compressor (13)
Power simulates live mine slip casting to 0.7-1.0MPa, forms hyperbaric environment between slurries (11) liquid level and sealing cover (6) at this time,
The hydraulic numerical value that the hydrostatic sensor (18) of the top detects at this time is identical as the grouting pressure of air compressor (13), explanation
Grouting pressure can be steadily transmitted in slurries (11), realize pressure stabilizing slip casting；
(7) stop the judgement of slip casting time: when the internal each hydrostatic sensor (18) of test loose media (9) detects pressure no longer
It changing, when the grouting pressure of baroceptor (14) detection stablizes constant, then pressure stabilizing 3min closes air compressor (13),
Stop slip casting, the seepage distance of slurries is slurries slip casting radius reference value at this time；
(8) sampling analysis obtains slip casting radius: removing hydrostatic sensor (18), dismantles sealing cover (6) and pedestal (2), bottom does not have
After having the loose media for touching slurries (11) to loosen, test table on loose media (9) is measured by the general measures tool such as ruler
The length of face to lower surface is slip casting radius；Uniaxial compression test is carried out after test after slip casting is infiltrated with loose media (9)
Analysis, then the positioning of slurries spreading morphology is carried out by the general measures tool such as ruler, accurately determine the slurries diffusion of loose media (9)
Radius；
(9) slip casting platform subsystem cleans: pourable medium after remaining slurries, slip casting being cleaned out, cleaning slip casting platform
System, in case next time uses.
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| CN108506033B (en) * | 2018-03-19 | 2019-04-26 | 山东科技大学 | The method of the best time for injecting of bolt-grouting support is determined in a kind of laboratory |
| CN109187284B (en) * | 2018-09-07 | 2021-11-26 | 广东睿住住工科技有限公司 | Cement slurry testing equipment and method |
| CN109975177B (en) * | 2019-04-30 | 2023-11-10 | 中南大学 | Simulation test device and method for grouting diffusion form of horizontal grouting port |
| CN113310780B (en) * | 2021-05-25 | 2023-06-13 | 北京中煤矿山工程有限公司 | Preparation method of laboratory cement grouting soil block |
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