CN109406289A - A kind of fragmented rock body secondary grouting reinforcing bearer properties test method - Google Patents
A kind of fragmented rock body secondary grouting reinforcing bearer properties test method Download PDFInfo
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- CN109406289A CN109406289A CN201811186182.0A CN201811186182A CN109406289A CN 109406289 A CN109406289 A CN 109406289A CN 201811186182 A CN201811186182 A CN 201811186182A CN 109406289 A CN109406289 A CN 109406289A
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- rock body
- fragmented rock
- mold
- secondary grouting
- grouting
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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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of fragmented rock body secondary groutings to strengthen bearer properties test method, specifically includes that selection Mold Making shape and size, designs reserved inlet well number；After the completion of mold is assembled, it is placed in rigidity matching carrying disk center；Screening rubble carries out laying and densification；Fragmented rock body surface standing is smoothed out after pouring into cement grout to no longer lower infiltration；Restarting rigidity matching unloads after being compressed to sillar peak strength；Preformed hole vertically drills through injected hole on bearing plate, and carries out cement grout secondary grouting reinforcing；After test specimen stands a period of time, secondary uniaxial compression test is carried out, carries out data collection and analysis, completes test.The present invention is arranged different numbers and reserves slip casting hole, realized fragmented rock body once grouting and secondary grouting in mold using the docking of production multi-panel groove and hermetically sealed mold, is improved fragmented rock body secondary grouting and is strengthened bearer properties test accuracy.
Description
Technical field
The present invention relates to mine working and tunnel support technical field, in particular to a kind of fragmented rock body secondary grouting is strengthened
Bearer properties test method.
Background technique
In mine working and Tunnel Engineering, it is frequently encountered fault belt or weak tight stratum, as engineering is tunneled
And cause rock crushing, cranny development, wall caving, roof fall phenomenon when leading to working face mining cause difficulty of construction and risk to increase,
Related technical measures must be taken.It has been proved by practice that by carrying out grouting and reinforcing to underground engineering fragmented rock body, it is broken to changing
Rock mass strength plays rock mass itself bearing capacity, ensures that underground passage and chamber have safely good effect, and it is broken to realize increase
The purpose of broken rock mass strength reduces the generation of accident, adapts to the needs that working face quickly propels.But in slip casting practice, usually
The case where will appear slurries thickening, condensing and block drilling and slurries seepage channel, slip casting effect is greatly reduced, and for note
Slurry schedule of reinforcement and its bring supporting effect do not have exact qualitative research, instruct often through experience, for complicated and changeable
Rock crushing situation can not suit the remedy to the case.
For the problem that current slip casting Investigation on intensification rests on engineering site, deformation and bearing capacity inconvenience are obtained, are proposed
A kind of fragmented rock body secondary grouting strengthens bearer properties test method, and a kind of novel die is used to carry out the dress of fragmented rock body
It fills out, be in the milk, slip casting, carrying experiment is carried out to rock mass using laboratory rigidity matching, facilitating acquisition experimental data, control experiment
Unitary variant in the process achievees the purpose that quantitative study, has guiding significance to the operation of underground engineering site.
Summary of the invention
The present invention proposes that a kind of fragmented rock body secondary grouting strengthens carrying aiming at the problem that slip casting reinforcing is still instructed by experience
Characteristic test method.The invention has the features such as easy to operate, experimental data is easy to monitor, process variable design is controllable, enriches
Laboratory slip casting Investigation on intensification method.
To achieve the above object, the invention discloses a kind of broken rock secondary groutings to strengthen bearer properties test method,
It specifically includes that selection Mold Making shape and size, designs reserved inlet well number；After the completion of mold is assembled, it is placed in just
Property testing machine carry disk center；Screening rubble carries out laying and densification；Kata-rocks are smoothed out after pouring into cement grout to no longer lower infiltration
Body surface face is stood；Restarting rigidity matching unloads after being compressed to sillar peak strength；Preformed hole vertically bores on bearing plate
Injected hole is taken, and carries out cement grout secondary grouting reinforcing；After test specimen stands a period of time, secondary uniaxial compression test is carried out,
Data collection and analysis is carried out, test is completed.Different numbers are arranged using the docking of production multi-panel groove and hermetically sealed mold in the present invention
Mesh reserves slip casting hole, realizes fragmented rock body once grouting and secondary grouting in mold, improves fragmented rock body secondary grouting
Strengthen bearer properties and tests accuracy.
A kind of fragmented rock body secondary grouting reinforcing bearer properties test method, characterized by the following steps:
Step 1 determines test lithology and broken partial size according to experiment purpose, selects Mold Making shape and size, and design is pre-
Stay inlet well number；
Step 2 by the smooth placement of bottom plate, then is engaged installation with left and right sidesing wall plate, front and rear baffle, is inserted into fixed pin, measures four sides
Verticality guarantees that die size error is not more than ± 0.5mm, and rear coating lubricating oil, guarantee and sillar is fixed in insertion top plate
Contact surface is smooth；
The mold being completed is placed in rigidity matching carrying disk center, is designed using power rammer real machine by step 3
Fragmented rock body successively loads compacting；
Step 4 places bearing plate in fragmented rock body filling exposed surface, carries axial amesdial and connect control system, starting is rigid
Property testing machine axial direction oil pump be loaded onto setting load, complete fragmented rock body initial pass；
Step 5, removes bearing plate and axial amesdial, cement grout is poured slowly into mold by several times, after sillar immersion again
It is secondary to pour into, until smooth out fragmented rock body surface after the no longer lower infiltration of slurries stands 28d or more again；
Step 6 places bearing plate again after grout cures and carries axial amesdial, starts rigidity matching axial direction oil pump
It is unloaded after carrying out compression test to sillar peak strength, removes axial amesdial；
Step 7, preformed hole vertically drills through injected hole on bearing plate, and cement grout is pressed into injected hole using grouting with pressure device
It is interior, extra slurries, which are cleared up, after holding certain time pressure stands 28d or more again；
Step 8 carries axial amesdial again, starts rigidity matching axial direction oil pump, the kata-rocks after secondary grouting is strengthened
Body compression failure again is saved and is analyzed to acquisition data, completes experiment.
Further, in step 2, each face of mold is groove docking, and is fastened using fixed pin, meanwhile, remove top plate
Outer other each faces are fully sealed, and prevent slurries overflow.
The advantages of the present invention are: the method for the present invention has the characteristics that easily operated, step is reasonable, Neng Gou
Anchor rod anchored supporting is provided under various complex situations, meets the anchoring requirements of different length different location.
Detailed description of the invention
Fig. 1 is to realize that a kind of fragmented rock body secondary grouting of the present invention strengthens bearer properties test method flow chart.
Fig. 2 is to realize that a kind of fragmented rock body secondary grouting of the present invention strengthens bearer properties test method die structure dwg.
In figure: 1 is fixed pin；2 be preformed hole；3 be bearing plate；4 be top plate；5 be fixed pin holes；6 be left and right sidesing wall plate；7
For front and rear baffle；8 be bottom plate.
Specific embodiment
The present invention is described in further detail with example with reference to the accompanying drawing.
The present invention provides a kind of fragmented rock body secondary groutings to strengthen bearer properties test method.
Step 1 determines test lithology and broken partial size according to experiment purpose, selects Mold Making shape and size, if
Count reserved inlet well number；
Step 2 by the smooth placement of bottom plate 8, then is engaged installation with left and right sidesing wall plate 6, front and rear baffle 7, is inserted into fixed pin 1, measurement four
The verticality in face guarantees that die size error is not more than ± 0.5mm, and insertion top plate 4 is fixed rear coating lubricating oil, guarantee with
Sillar contact surface is smooth；
The mold being completed is placed in rigidity matching carrying disk center, is designed using power rammer real machine by step 3
Fragmented rock body successively loads compacting；
Step 4 places bearing plate 3 in fragmented rock body filling exposed surface, carries axial amesdial and connect control system, start
Rigidity matching axial direction oil pump is loaded onto setting load, completes fragmented rock body initial pass；
Step 5, removes bearing plate 3 and axial amesdial, cement grout is poured slowly into mold by several times, after sillar immersion
It pours into again, until smooth out fragmented rock body surface after the no longer lower infiltration of slurries stands 28d or more again；
Step 6 places bearing plate 3 again after grout cures and carries axial amesdial, starts rigidity matching axial direction oil pump
It is unloaded after carrying out compression test to sillar peak strength, removes axial amesdial；
Step 7, preformed hole 2 vertically drills through injected hole on bearing plate 3, and cement grout is pressed into slip casting using grouting with pressure device
In hole, extra slurries are cleared up after holding certain time pressure and stand 28d or more again；
Step 8 carries axial amesdial again, starts rigidity matching axial direction oil pump, the kata-rocks after secondary grouting is strengthened
Body compression failure again is saved and is analyzed to acquisition data, completes experiment.
Further, in step 2, each face of mold is groove docking, and is fastened using fixed pin 1, meanwhile, except top
Other each faces are fully sealed outside plate 4, prevent slurries overflow.
Protection scope of the present invention is not limited only to the description of present embodiment, but is limited according to claim
It is fixed.
Claims (2)
1. a kind of fragmented rock body secondary grouting strengthens bearer properties test method, characterized by the following steps:
Step 1 determines test lithology and broken partial size according to experiment purpose, selects Mold Making shape and size, and design is pre-
Stay inlet well number；
Step 2 by the smooth placement of bottom plate, then is engaged installation with left and right sidesing wall plate, front and rear baffle, is inserted into fixed pin, measures four sides
Verticality guarantees that die size error is not more than ± 0.5mm, and rear coating lubricating oil, guarantee and sillar is fixed in insertion top plate
Contact surface is smooth；
The mold being completed is placed in rigidity matching carrying disk center, is designed using power rammer real machine by step 3
Fragmented rock body successively loads compacting；
Step 4 places bearing plate in fragmented rock body filling exposed surface, carries axial amesdial and connect control system, starting is rigid
Property testing machine axial direction oil pump be loaded onto setting load, complete fragmented rock body initial pass；
Step 5, removes bearing plate and axial amesdial, cement grout is poured slowly into mold by several times, after sillar immersion again
It is secondary to pour into, until smooth out fragmented rock body surface after the no longer lower infiltration of slurries stands 28d or more again；
Step 6 places bearing plate again after grout cures and carries axial amesdial, starts rigidity matching axial direction oil pump
It is unloaded after carrying out compression test to sillar peak strength, removes axial amesdial；
Step 7, preformed hole vertically drills through injected hole on bearing plate, and cement grout is pressed into injected hole using grouting with pressure device
It is interior, extra slurries, which are cleared up, after holding certain time pressure stands 28d or more again；
Step 8 carries axial amesdial again, starts rigidity matching axial direction oil pump, the kata-rocks after secondary grouting is strengthened
Body compression failure again is saved and is analyzed to acquisition data, completes experiment.
2. strengthening bearer properties test method according to a kind of fragmented rock body secondary grouting described in claim 1, it is characterised in that:
In step 2, each face of mold is groove docking, and is fastened using fixed pin, meanwhile, other each faces are completely close in addition to top plate
Envelope, prevents slurries overflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811186182.0A CN109406289B (en) | 2018-10-12 | 2018-10-12 | Test method for secondary grouting reinforcement bearing characteristic of fractured rock mass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811186182.0A CN109406289B (en) | 2018-10-12 | 2018-10-12 | Test method for secondary grouting reinforcement bearing characteristic of fractured rock mass |
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| Publication Number | Publication Date |
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| CN109406289A true CN109406289A (en) | 2019-03-01 |
| CN109406289B CN109406289B (en) | 2021-03-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792114A (en) * | 2019-12-18 | 2020-02-14 | 江西省建筑科学研究院 | Grouting and slurry taking test mold after foundation pile self-balancing static load test |
| CN111487164A (en) * | 2020-04-21 | 2020-08-04 | 重庆大学 | Novel variable-load pressurized grouting test method for fractured coal and rock mass |
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| CN104965060A (en) * | 2015-07-02 | 2015-10-07 | 山东大学 | Simulation experiment method for evaluating grouting reinforcement effect of different factors on fractured rock mass |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792114A (en) * | 2019-12-18 | 2020-02-14 | 江西省建筑科学研究院 | Grouting and slurry taking test mold after foundation pile self-balancing static load test |
| CN111487164A (en) * | 2020-04-21 | 2020-08-04 | 重庆大学 | Novel variable-load pressurized grouting test method for fractured coal and rock mass |
| CN111487164B (en) * | 2020-04-21 | 2022-10-14 | 重庆大学 | Novel load-variable pressurizing grouting test method for crushed coal rock mass |
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| Publication number | Publication date |
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| CN109406289B (en) | 2021-03-30 |
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