CN104564113B - The construction method of roadway surrounding rock fiber slurry grouting and reinforcing - Google Patents
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing Download PDFInfo
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- CN104564113B CN104564113B CN201510020792.3A CN201510020792A CN104564113B CN 104564113 B CN104564113 B CN 104564113B CN 201510020792 A CN201510020792 A CN 201510020792A CN 104564113 B CN104564113 B CN 104564113B
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- 239000011435 rock Substances 0.000 title claims abstract description 85
- 239000000835 fiber Substances 0.000 title claims abstract description 81
- 239000002002 slurry Substances 0.000 title claims abstract description 78
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 26
- 239000011398 Portland cement Substances 0.000 claims abstract description 51
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 42
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 239000002360 explosive Substances 0.000 claims abstract description 7
- 210000004911 serous fluid Anatomy 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 77
- 239000003365 glass fiber Substances 0.000 claims description 51
- 239000003513 alkali Substances 0.000 claims description 50
- 239000004568 cement Substances 0.000 claims description 45
- 239000003638 chemical reducing agent Substances 0.000 claims description 40
- 239000002245 particle Substances 0.000 claims description 31
- 238000007569 slipcasting Methods 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000004880 explosion Methods 0.000 claims description 6
- 208000002565 Open Fractures Diseases 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000003469 silicate cement Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 abstract 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- 208000010392 Bone Fractures Diseases 0.000 description 11
- 206010017076 Fracture Diseases 0.000 description 11
- 238000002360 preparation method Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000005474 detonation Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mining & Mineral Resources (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses the construction method of roadway surrounding rock fiber slurry grouting and reinforcing, grouting serous fluid is fiber slurry, the construction method for grouting reinforcement of fiber slurry uses following steps: hole country rock, isolated tube is put into after having holed, ignite the explosive being previously positioned at isolated tube inwall, in isolated tube, place anchor pole afterwards；Stop grouting plug is respectively fitted on anchor pole and isolated tube composition dicyclo stop grouting plug, then installs pallet, fastening nut additional；Carrying out once grouting and inject fiber slurry, Grouting Pipe connects isolated tube, and fiber slurry is penetrated into wall-rock crack by isolated tube；Carrying out secondary grouting, Grouting Pipe connects anchor pole, and portland cement is injected by anchor pole with waterglass serosity.This construction method ensures that anchor pole also can high performance play a role under high-stress state, improves anchor pole, serosity, fiber, the globality of country rock so that four synergism, thus fundamentally improves the character of country rock, it is ensured that the monolithic stability of country rock.
Description
Technical field
The present invention relates to the rock-reinforcing during tunnel, heavily stressed many cracks is built in the underground engineerings such as a kind of mine engineering, Tunnel Engineering
Construction method, the construction method of a kind of roadway surrounding rock fiber slurry grouting and reinforcing.
Background technology
In the underground engineering such as mine engineering, Tunnel Engineering, after exposing along with roadway excavation country rock, crustal stress starts progressively to discharge,
Initial fissure extension in rock and then generation secondary interstice, greatly threaten the safety and stability in tunnel.Now need to take effectively
Roadway surrounding rock is reinforced by method, controls its deformation, stablizes its stress, it is ensured that the stability of country rock, use effective supporting
Means, improve country rock self-strength, it is ensured that supporting construction and country rock synergism resist crustal stress jointly, it is ensured that surrouding rock deformation,
Force controlled is in rational scope.
On drift support type, use the active supports such as traditional anchor pole, suspention, compression work can be played to a certain extent
With, but still cannot fundamentally change the character of country rock self, and especially in broken, soft-rock tunnel, anchor-holding force of anchor bolt
Be unable to reach design load, so cannot its effect of maximized performance, add the difficulty of roadway support.Current most note
Paste-making method and construction method all use conventional slurries to carry out slip casting, conventional slurries and grouting method for improving country rock self
The shearing resistance of intensity, especially crack, tensile strength are limited, and the extension in crack does not obtain substantive improvement, to underground work
Efficient, the safety in production of journey bring huge threat.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention proposes the construction method of roadway surrounding rock fiber slurry grouting and reinforcing.Originally execute
Big crack country rock is injected fibre-bearing serosity by work method can improve country rock bulk strength.
The present invention adopts the following technical scheme that
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing, adds alkali-resistant glass fibre in grouting serous fluid and becomes fiber slurry,
The construction method employing following steps of the grouting and reinforcing of cooperation fiber slurry:
(1) country rock is holed, after having holed, put into isolated tube, ignite the explosive being previously positioned at isolated tube inwall, it
After in isolated tube place anchor pole, the effect of isolated tube be closure serosity realize secondary grouting and for explosion open fracture opening provide
Carrier；
(2) stop grouting plug is respectively fitted on anchor pole and isolated tube, makes stop grouting plug be combined and install stop grouting plug tail with country rock tighter gap
Portion's composition dicyclo stop grouting plug, then installs pallet, fastening nut additional；
(3) carrying out once grouting and inject fiber slurry, Grouting Pipe connects isolated tube, and fiber slurry passes through isolated tube to wall-rock crack
Penetrate into；
(4) carrying out secondary grouting after once grouting reaches final grouting pressure a period of time, Grouting Pipe connects anchor pole, silicate cement
Mud is injected by anchor pole with waterglass serosity, unloads lower tray during slip casting, reaches slip casting limit, secondary grouting final pressure back outside
Removal isolated tube, adjusts dicyclo stop grouting plug, then installs pallet additional after removing isolated tube completely, continue slip casting until again reaching two
Slip casting is stopped after secondary final grouting pressure a period of time.
Preferably, described fiber slurry includes superfine cement, water, water reducer and alkali-resistant glass fibre, described water and superfine cement
Mass ratio be 1.2:1-1:1, water reducer volume is the 1%-2% of superfine cement quality, and the volume of alkali-resistant glass fibre accounts for cumulative volume
1%-2%；
Wherein superfine cement average particle size is 2.8um-3.6um, and maximum particle diameter is less than 20um；Water reducer uses Cai Xigao
Effect water reducer.
Preferably, described fiber slurry includes Portland cement, water, water reducer and alkali-resistant glass fibre, and described water is with general
The mass ratio of logical portland cement is 1.2:1-1:1, and water reducer volume is the 1%-2% of superfine cement quality, alkali-resistant glass fibre
Volume 1%-2% of the total volume；
Wherein Portland cement average particle size is 36um-68um, and maximum particle diameter is less than 80um；Water reducer uses Cai
Series high-efficiency water-reducing agent.
Preferably, a length of 1mm-6mm of described alkali-resistant glass fibre, a diameter of 10um-20um, use following steps to alkaline-resisting glass
Glass fiber carries out pretreatment:
A. alkali-resistant glass fibre is first through 350 DEG C of high-temperature heat treatment 1min；
The most again alkali-resistant glass fibre is placed on 20% dilute NaOH and dilute KOH solution in 100 DEG C heat two hours；
C. alkali-resistant glass fibre 30min is cleaned with the distilled water of 100 DEG C of flowings.
Preferably, superfine cement/Portland cement is first pressed proportioning mix and blend with water by described fiber slurry preparation process
After 1.5min, it is subsequently adding pretreated alkali-resistant glass fibre stirring 3min.
Preferably, in described step (1), isolated tube diameter is more than bolt diameter less than bore diameter, and isolated tube is divided into gas
One-way cock, the airtight steel pipe layer in inner side and outer elastic rubber layer, described isolated tube is provided with gas unidirectional valve, can be unidirectional
To outside country rock transmission detonation wave, Grouting Pipe is fixed in outer rubber layer, is had injected hole by isolated tube outer rubber layer,
It also is provided with injected hole on anchor pole, a diameter of 30mm of injected hole on outer rubber layer and anchor pole simultaneously.
Preferably, in described step (1), being fixed with a small amount of Explosive roll inside isolated tube, fine explosion is by tight with country rock
Vibrations are passed to country rock by the outer rubber layer of contact, open fracture opening further, discharge crustal stress.
Preferably, in described step (3), the injection speed of once grouting is 20L/min, and final grouting pressure is 1.25MPa, note
During slurry, pressure increases step by step, respectively with 0.5MPa, 0.75MPa, 1MPa, 1.25MPa successively slip casting.
Preferably, described step (4) portland cement and water glass solution include waterglass, water and cement, described water and water
The mass ratio of mud is 0.8:1, and cement is 1:1 with the volume ratio of waterglass；
Wherein Portland cement average particle size is 56um-68um, and maximum particle diameter is less than 80um；The concentration of waterglass
For 34Be '-40Be ', modulus of water glass is 2.4-2.8.
Preferably, in described step (4), the injection speed of secondary grouting is 10L/min, and final grouting pressure is 1.5MPa, reaches
Outwards remove isolated tube to slip casting limit, secondary grouting final pressure 1.5MPa back, adjust dicyclo stop grouting plug after removing completely and install torr additional
Dish, until stopping slip casting after again reaching secondary grouting final pressure 1.5MPa.
The Advantageous Effects using such scheme to obtain is:
Crack propagation is amplified by the construction method explosion in advance of roadway surrounding rock fiber slurry grouting and reinforcing, and produces secondary crack, logical
Cross once grouting to inject and be filled with by outside country rock with the superfine cement serosity of alkali-resistant glass fibre, injected by secondary grouting
Anchor pole exterior circumferential is filled with by the cement-silicate serosity not containing fiber, and slowly that isolated tube is outside by marginal not slurry limit
Removal so that the small spaces in the country rock filled by fibre-bearing serosity by certain pressure without fiber slurry carries out secondary filling,
The portland cement waterglass serosity that secondary injects accelerates the setting time of serosity, realizes quick blocking serosity circle for once grouting
After face, excavation country rock, accelerating construction progress provides technical support, ensure that the density of country rock fiberfill fibers serosity simultaneously, makes
The shearing strength of country rock, tensile strength are effectively strengthened, and be also filled with without fiber slurry around anchor pole so that serosity and
The close contact of anchor pole and caking property, it is ensured that anchor pole also can high performance play a role under high-stress state, raising anchor pole,
Serosity, fiber, the globality of country rock so that four synergism, thus fundamentally improve the character of country rock, it is ensured that enclose
The monolithic stability of rock, produces for site safety, ensures that lives and properties provide strong technical support.
Accompanying drawing explanation
Fig. 1 is the construction method flow chart of roadway surrounding rock fiber slurry grouting and reinforcing.
Fig. 2 is dicyclo stop grouting plug scheme of installation.
Fig. 3 is removal isolated tube schematic diagram in secondary grouting.
Fig. 4 is the schematic diagram after roadway surrounding rock fiber slurry grouting and reinforcing has been constructed.
Detailed description of the invention
Detailed description of the invention in conjunction with 1 to 4 couple of present invention of accompanying drawing is described further:
Embodiment 1:
The fracture opening country rock less than 1mm.
Select a length of 1mm of alkali-resistant glass fibre, a diameter of 10um, make fiber slurry enter wall-rock crack, fundamentally improve
The character of country rock, it is ensured that the monolithic stability of country rock.Use following steps that alkali-resistant glass fibre carries out pretreatment:
A. alkali-resistant glass fibre is first through 350 DEG C of high-temperature heat treatment 1min；
The most again alkali-resistant glass fibre is placed on 20% dilute NaOH and dilute KOH solution in 100 DEG C heat two hours；
C. alkali-resistant glass fibre 30min is cleaned with the distilled water of 100 DEG C of flowings.
Fiber slurry includes that superfine cement, water, water reducer and alkali-resistant glass fibre, described water are 1:1 with the mass ratio of superfine cement,
Water reducer volume is the 1% of superfine cement quality, and the volume of the total volume 1% of alkali-resistant glass fibre, wherein superfine cement is average
Grain diameter is 2.8um-3.6um, and maximum particle diameter is less than 20um, and water reducer uses Cai's series high-efficiency water-reducing agent i.e. Cai Huangsuanyanjia
Aldehyde condensate.
Superfine cement, water first by after proportioning mix and blend 1.5min, are subsequently adding pre-with water reducer by fiber slurry preparation process
The alkali-resistant glass fibre stirring 3min processed.Select superfine cement configure the above-mentioned fiber slurry that allows, be to allow fiber slurry
Preferably penetrate into wall-rock crack.
Portland cement and water glass solution include that waterglass, water and cement, described water are 0.8:1 with the mass ratio of cement,
Cement is 1:1 with the volume ratio of waterglass；Wherein Portland cement average particle size is 56um-68um, and maximum particle diameter is not
More than 80um；The concentration of waterglass is 34Be ', and modulus of water glass is 2.4.
Fracture opening is less than the construction method employing following steps of 1mm roadway surrounding rock fiber slurry grouting and reinforcing:
(1) country rock 1 is carried out boring and obtains holing 3, after having holed, put into isolated tube 4, ignite and be previously positioned at isolated tube
The explosive of inwall, places anchor pole 5 in isolated tube 4, the effect of isolated tube is that closure serosity realizes secondary grouting and opens for explosion
Fracture opening provides carrier；
Wherein, isolated tube 4 diameter more than anchor pole 5 diameter and be slightly less than boring 3 diameters, isolated tube be divided into gas unidirectional valve,
The airtight steel pipe layer in inner side and outer elastic rubber layer, described isolated tube is provided with gas unidirectional valve, can be unidirectional to outside country rock
Transmission detonation wave, Grouting Pipe is fixed in outer rubber layer, by having injected hole on isolated tube outer rubber layer, the most simultaneously,
Also being provided with injected hole on anchor pole, the injected hole diameter on outer rubber layer and anchor pole is 30mm.
The effect of isolated tube: be fixed with a small amount of Explosive roll inside one slip casting early stage isolated tube, be provided with gas at isolated tube tube wall
One-way cock, the detonation wave that ignition charge produces transmits to outside country rock by gas unidirectional valve is unidirectional, opens crack further
Aperture, discharges crustal stress；Its two closure serosity, it is achieved delamination pour slurry, inject in country rock the serosity with fiber strengthen its shearing resistance,
Tensile property, injects around anchor pole and strengthens cementation without fiber slurry, more securely play bolt action.
(2) stop grouting plug is respectively fitted on anchor pole 5 and isolated tube 4 (as shown in Figure 2), makes stop grouting plug and country rock tighter gap
In conjunction with and install stop grouting plug afterbody composition dicyclo stop grouting plug 6, then install pallet, fastening nut additional；
(3) carrying out once grouting and inject fiber slurry, Grouting Pipe connects isolated tube 4, the fiber slurry injected hole by isolated tube
Penetrate into wall-rock crack；
The injection speed of once grouting is 20L/min, and final grouting pressure is 1.25MPa, and during slip casting, pressure increases step by step, respectively
With 0.5MPa, 0.75MPa, 1MPa, 1.25MPa successively slip casting.
(4) carrying out secondary grouting after once grouting reaches final grouting pressure 30min, Grouting Pipe connects anchor pole 5, silicate cement
Mud is injected by the injected hole of anchor pole with waterglass serosity, unloads lower tray 7 during slip casting, and the injection speed of secondary grouting is
10L/min, final grouting pressure is 1.5MPa, reach slip casting limit, secondary grouting final pressure 1.5MPa back outwards remove isolated tube 4 (as
Shown in Fig. 3), adjust dicyclo stop grouting plug 6 after removing isolated tube 4 completely, then install pallet 7 additional, fastening nut, continues slip casting
Until after again reaching secondary grouting final pressure 1.5MPa 60 seconds stop slip casting.
Slip casting terminates (as shown in Figure 4), and the alkali-resistant glass fibre 8 in fiber slurry is near country rock, and enters in crack, leans on
The serosity of nearly anchor pole is without alkali-resistant glass fibre, and secondary grouting does not contains the portland cement waterglass serosity of fiber by outside anchor pole
Around it is filled with, and slowly isolated tube is outwards removed by marginal not slurry limit so that will be contained by certain pressure without fiber slurry
Small spaces in the country rock that fiber slurry is filled carries out secondary filling, and the portland cement waterglass serosity that secondary injects accelerates
The setting time of serosity, after realizing quick blocking slurry interface, excavation country rock for once grouting, accelerating construction progress provides technology
Support, ensure that the density of country rock fiberfill fibers serosity so that the shearing strength of country rock, tensile strength are effectively added simultaneously
By force, it is also filled with around anchor pole without fiber slurry so that serosity and the close contact of anchor pole and caking property, it is ensured that anchor pole
Also can high performance play a role under high-stress state.
Embodiment 2:
Fracture opening is the country rock of 1mm-2mm.
Select a length of 2mm of alkali-resistant glass fibre, a diameter of 12um, alkali-resistant glass fibre is carried out the step of pretreatment with implementing
Example 1.
Fiber slurry includes Portland cement, water, water reducer and alkali-resistant glass fibre, described water and Portland cement
Mass ratio be 1:1, water reducer volume is the 1% of Portland cement quality, and the volume of alkali-resistant glass fibre is of the total volume
1%, wherein Portland cement average particle size is 36um-48um, and maximum particle diameter is less than 60um；Water reducer uses Cai
Series high-efficiency water-reducing agent i.e. Cai's sulfonate and formaldehyde condensation substance.
After Portland cement, water are first pressed proportioning mix and blend 1.5min with water reducer by fiber slurry preparation process, then
Add pretreated alkali-resistant glass fibre stirring 3min.Portland cement is selected to configure the above-mentioned fiber slurry that allows, both full
Foot fiber slurry penetrates into the requirement of wall-rock crack, meets again the requirement of Financial cost, because Portland cement is relative to ultra-fine
The cost of cement is low.
Portland cement and water glass solution include that waterglass, water and cement, described water are 0.8:1 with the mass ratio of cement,
Cement is 1:1 with the volume ratio of waterglass；Wherein Portland cement average particle size is 36um-48um, and maximum particle diameter is not
More than 60um；The concentration of waterglass is 34Be ', and modulus of water glass is 2.6.
The construction method of fracture opening 1mm-2mm roadway surrounding rock fiber slurry grouting and reinforcing adopts step with embodiment 1.
Embodiment 3:
Fracture opening is the country rock of 2mm-3mm.
Select a length of 3mm of alkali-resistant glass fibre, a diameter of 14um, alkali-resistant glass fibre is carried out the step of pretreatment with implementing
Example 1.
Fiber slurry includes Portland cement, water, water reducer and alkali-resistant glass fibre, described water and Portland cement
Mass ratio be 1.1:1, water reducer volume is the 1.5% of Portland cement quality, and the volume of alkali-resistant glass fibre accounts for totally
Long-pending 1.5%, wherein Portland cement average particle size is 46um-58um, and maximum particle diameter is less than 80um；Diminishing
Agent uses Cai's series high-efficiency water-reducing agent i.e. Cai's sulfonate and formaldehyde condensation substance.
After Portland cement, water are first pressed proportioning mix and blend 1.5min with water reducer by fiber slurry preparation process, then
Add pretreated alkali-resistant glass fibre stirring 3min.Portland cement is selected to configure the above-mentioned fiber slurry that allows, both full
Foot fiber slurry penetrates into the requirement of wall-rock crack, meets again the requirement of Financial cost, because Portland cement is relative to ultra-fine
The cost of cement is low.
Portland cement and water glass solution include that waterglass, water and cement, described water are 0.8:1 with the mass ratio of cement,
Cement is 1:1 with the volume ratio of waterglass；Wherein Portland cement average particle size is 46um-58um, and maximum particle diameter is not
More than 80um；The concentration of waterglass is 36Be ', and modulus of water glass is 2.6.
The construction method of fracture opening 2mm-3mm roadway surrounding rock fiber slurry grouting and reinforcing adopts step with embodiment 1.
Embodiment 4:
Fracture opening is the country rock of 3mm-5mm.
Select a length of 5mm of alkali-resistant glass fibre, a diameter of 16um, alkali-resistant glass fibre is carried out the step of pretreatment with implementing
Example 1.
Fiber slurry includes the quality of Portland cement, water, water reducer and alkali-resistant glass fibre, described water and superfine cement
Ratio is 1.1:1, and water reducer volume is the 1.5% of Portland cement quality, and the volume of alkali-resistant glass fibre is of the total volume
1.5%, wherein Portland cement average particle size is 46um-58um, and maximum particle diameter is less than 80um；Water reducer uses
Cai's series high-efficiency water-reducing agent i.e. Cai's sulfonate and formaldehyde condensation substance.
After Portland cement, water are first pressed proportioning mix and blend 1.5min with water reducer by fiber slurry preparation process, then
Add pretreated alkali-resistant glass fibre stirring 3min.Portland cement is selected to configure the above-mentioned fiber slurry that allows, both full
Foot fiber slurry penetrates into the requirement of wall-rock crack, meets again the requirement of Financial cost, because Portland cement is relative to ultra-fine
The cost of cement is low.
Portland cement and water glass solution include that waterglass, water and cement, described water are 0.8:1 with the mass ratio of cement,
Cement is 1:1 with the volume ratio of waterglass；Wherein Portland cement average particle size is 46um-58um, and maximum particle diameter is not
More than 80um；The concentration of waterglass is 38Be ', and modulus of water glass is 2.8.
The construction method of fracture opening 4mm-5mm roadway surrounding rock fiber slurry grouting and reinforcing adopts step with embodiment 1.
Embodiment 5:
The fracture opening country rock more than 5mm.
Select a length of 6mm of alkali-resistant glass fibre, a diameter of 20um, alkali-resistant glass fibre is carried out the step of pretreatment with implementing
Example 1.
Fiber slurry includes the quality of Portland cement, water, water reducer and alkali-resistant glass fibre, described water and superfine cement
Ratio is 1.1:1, and water reducer volume is the 2% of Portland cement quality, the volume of the total volume 2% of alkali-resistant glass fibre,
Wherein Portland cement average particle size is 56um-68um, and maximum particle diameter is less than 80um；Water reducer uses Cai Xigao
Effect water reducer i.e. Cai's sulfonate and formaldehyde condensation substance.
After Portland cement, water are first pressed proportioning mix and blend 1.5min with water reducer by fiber slurry preparation process, then
Add pretreated alkali-resistant glass fibre stirring 3min.Portland cement is selected to configure the above-mentioned fiber slurry that allows, both full
Foot fiber slurry penetrates into the requirement of wall-rock crack, meets again the requirement of Financial cost, because Portland cement is relative to ultra-fine
The cost of cement is low.
Portland cement and water glass solution include that waterglass, water and cement, described water are 0.8:1 with the mass ratio of cement,
Cement is 1:1 with the volume ratio of waterglass；Wherein Portland cement average particle size is 56um-68um, and maximum particle diameter is not
More than 80um；The concentration of waterglass is 40Be ', and modulus of water glass is 2.8.
Fracture opening adopts step with embodiment 1 more than the construction method of 5mm roadway surrounding rock fiber slurry grouting and reinforcing.
Certainly, only presently preferred embodiments of the present invention described above, the present invention is not limited to enumerate above-described embodiment, it should say
Bright, any those of ordinary skill in the art are under the guidance of this specification, and all equivalents made substitute, substantially become
Shape form, within all falling within the essential scope of this specification, ought to be protected by the present invention.
Claims (10)
1. the construction method of roadway surrounding rock fiber slurry grouting and reinforcing, it is characterised in that add alkali-proof glass in grouting serous fluid fine
Dimension becomes fiber slurry, the construction method employing following steps of the grouting and reinforcing of cooperation fiber slurry:
(1) country rock is holed, after having holed, put into isolated tube, ignite the explosive being previously positioned at isolated tube inwall, it
After in isolated tube place anchor pole, the effect of isolated tube be closure serosity realize secondary grouting and for explosion open fracture opening provide
Carrier；
(2) stop grouting plug is respectively fitted on anchor pole and isolated tube, makes stop grouting plug be combined and install stop grouting plug tail with country rock tighter gap
Portion's composition dicyclo stop grouting plug, then installs pallet, fastening nut additional；
(3) carrying out once grouting and inject fiber slurry, Grouting Pipe connects isolated tube, and fiber slurry passes through isolated tube to wall-rock crack
Penetrate into；
(4) carrying out secondary grouting after once grouting reaches final grouting pressure a period of time, Grouting Pipe connects anchor pole, silicate cement
Mud is injected by anchor pole with waterglass serosity, unloads lower tray during slip casting, reaches slip casting limit, secondary grouting final pressure back outside
Removal isolated tube, adjusts dicyclo stop grouting plug, then installs pallet additional after removing isolated tube completely, continue slip casting until again reaching two
Slip casting is stopped after secondary final grouting pressure a period of time.
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing the most according to claim 1, it is characterised in that described fibre
Dimension serosity includes that superfine cement, water, water reducer and alkali-resistant glass fibre, described water are 1.2:1-1:1 with the mass ratio of superfine cement,
Water reducer volume is the 1%-2% of superfine cement quality, the volume 1%-2% of the total volume of alkali-resistant glass fibre；
Wherein superfine cement average particle size is 2.8um-3.6um, and maximum particle diameter is less than 20um；Water reducer uses Cai Xigao
Effect water reducer.
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing the most according to claim 1, it is characterised in that described fibre
Dimension serosity includes the quality of Portland cement, water, water reducer and alkali-resistant glass fibre, described water and Portland cement
Ratio is 1.2:1-1:1, and water reducer volume is the 1%-2% of superfine cement quality, the volume of the total volume 1% of alkali-resistant glass fibre
-2%；
Wherein Portland cement average particle size is 36um-68um, and maximum particle diameter is less than 80um；Water reducer uses Cai
Series high-efficiency water-reducing agent.
4. according to the construction method of the roadway surrounding rock fiber slurry grouting and reinforcing described in Claims 2 or 3, it is characterised in that institute
State a length of 1mm-6mm of alkali-resistant glass fibre, a diameter of 10um-20um, use following steps that alkali-resistant glass fibre is carried out pre-place
Reason:
A. alkali-resistant glass fibre is first through 350 DEG C of high-temperature heat treatment 1min；
The most again alkali-resistant glass fibre is placed on 20% dilute NaOH and dilute KOH solution in 100 DEG C heat two hours；
C. alkali-resistant glass fibre 30min is cleaned with the distilled water of 100 DEG C of flowings.
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing the most according to claim 4, it is characterised in that described fibre
After cement is first pressed proportioning mix and blend 1.5min with water by dimension slurry production process, it is subsequently adding pretreated alkali-proof glass fine
Dimension stirring 3min.
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing the most according to claim 1, it is characterised in that described step
Suddenly, in (1), isolated tube diameter is more than bolt diameter less than bore diameter, and isolated tube is divided into gas unidirectional valve, inner side airtight
Steel pipe layer and outer elastic rubber layer, described isolated tube is provided with gas unidirectional valve, can be unidirectional quick-fried to outside country rock transmission
Hong ripple, Grouting Pipe is fixed in outer rubber layer, is had injected hole by isolated tube outer rubber layer, also is provided with simultaneously on anchor pole
Injected hole, a diameter of 30mm of injected hole on outer rubber layer and anchor pole.
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing the most according to claim 6, it is characterised in that described step
Suddenly in (1), being fixed with a small amount of Explosive roll inside isolated tube, fine explosion is by the outer rubber layer general being in close contact with country rock
Vibrations pass to country rock, open fracture opening further, discharge crustal stress.
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing the most according to claim 1, it is characterised in that described step
Suddenly in (3), the injection speed of once grouting is 20L/min, and final grouting pressure is 1.25MPa, and during slip casting, pressure increases step by step
Add, respectively with 0.5MPa, 0.75MPa, 1MPa, 1.25MPa successively slip casting.
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing the most according to claim 1, it is characterised in that described step
Suddenly (4) portland cement and water glass solution include that waterglass, water and cement, described water are 0.8:1 with the mass ratio of cement,
Cement is 1:1 with the volume ratio of waterglass；
Wherein portland cement average particle size is 56um-68um, and maximum particle diameter is less than 80um；The concentration of waterglass is
34Be '-40Be ', modulus of water glass is 2.4-2.8.
The construction method of roadway surrounding rock fiber slurry grouting and reinforcing the most according to claim 1, it is characterised in that described
In step (4), the injection speed of secondary grouting is 10L/min, and final grouting pressure is 1.5MPa, reaches secondary grouting final pressure 1.5MPa
Slip casting limit, back outwards removes isolated tube, adjusts dicyclo stop grouting plug and install pallet additional after removing completely, until again reaching secondary injection
Slip casting is stopped after slurry final pressure 1.5MPa.
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| US4193715A (en) * | 1978-05-12 | 1980-03-18 | The Eastern Company | Mine roof support method and apparatus |
| EP0437262B1 (en) * | 1990-01-11 | 1994-07-27 | TREVI S.p.A. | Method for preventive consolidation of the soil for underground minings |
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