CN104529339B - A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry - Google Patents
A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry Download PDFInfo
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- CN104529339B CN104529339B CN201510018415.6A CN201510018415A CN104529339B CN 104529339 B CN104529339 B CN 104529339B CN 201510018415 A CN201510018415 A CN 201510018415A CN 104529339 B CN104529339 B CN 104529339B
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Abstract
The invention discloses a kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry, starch including early stage leak stopping slurry and later stage leak stopping；Early stage leak stopping slurry is made up of the component of following parts by weight: composite filler 35 parts, composite consolidation agent 45 parts, sodium polyacrylate crosslinked copolymer particles 2.5 3 parts, flax fiber 56 parts, 0.5 1 parts of sawdust, 80 85 parts of water；Later stage leak stopping slurry is made up of the component of following parts by weight: portland cement 20 30 parts, sodium polyacrylate crosslinked copolymer particles 5 10 parts, flax fiber 5 15 parts, medium sand 15 20 parts, 5 10 parts of water；Bridge joint blocking method and chemical plugging are combined by the leak stopping slurry that the present invention provides, and reduce leak stopping risk, improve plugging effect, and cost is relatively low simultaneously.
Description
Technical field
The invention belongs to Base of Dam of Reservoir or other Rock And Soils are internal containing leak stopping slurry neck during the grouting of hidden large fracture
Territory, is specifically related to a kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry.
Background technology
Hydraulic engineering plays very important effect to the economic development of China, is possible not only to flood control and disaster reduction, also
Can be agricultural production and water for industrial use offer water source, therefore the relationship between quality of hydraulic engineering be to the life of the people
Property, is the problem of various circles of society's extensive concern.The frequent produced problem of hydraulic engineering has seepage, engineering to set
Standby aging, working procedure management imperfection, quality information feedback system are unsound.Wherein, leakage problems
The most serious being also most difficult to processes, the concentrative seepage problem that especially under dam foundation stratum, large fracture is formed.
At present, the method that leak stopping is conventional mainly bridge joint leak stopping and chemical plugging.Conventional bridge joint blocking method,
It is according to Size of Crack, leak-off velocity, hard particle materials, such as lamellar, fiber, powdery bridge formation are carried out leak stopping
Crack, forms mechanical blockage under pressurization squeezing action, reaches the purpose of leak stopping.Bridge joint leak stopping low cost,
It is widely used, but causes leak stopping success rate low owing to loss circulation material self is unlikely to deform.Chemical plugging is main
According to high polymer generation chemical reaction, self can with deformed dilation thus play the effect of leak stopping.Chemical plugging
Although effective, but blocking method risk is high, cost is the highest relative to bridging.
Summary of the invention
A kind of polypropylene cross-linked copolymer fiber concrete leak stopping that the present invention is directed to above-mentioned weak point and provide
Slurry, the present invention with portland cement, sodium polyacrylate cross-linked copolymer, sand, flax fiber as main material,
Material is simple, easy construction, and bridge joint blocking method and chemical plugging are combined by the present invention, reduce stifled
Leaking out danger, improve plugging effect, cost is relatively low simultaneously.
For achieving the above object, the technical solution adopted for the present invention to solve the technical problems is:
A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry, starches including early stage low-density expanded type leak stopping
Starch with later stage high-density sealed type leak stopping；
Wherein, early stage low-density expanded type leak stopping slurry is made up of the component of following parts by weight: composite filler
3-5 part, composite consolidation agent 4-5 part, sodium polyacrylate crosslinked copolymer particles 2.5-3 part, flax fiber 5-6
Part, sawdust 0.5-1 part, water 80-85 part；Each component is weighed by its parts by weight, mixes, through wet milk
Sending into agitator after grinding, then add UNF-5 type high efficiency water reducing agent, UNF-5 type high efficiency water reducing agent accounts for
State the 7%-9% of component weight, obtain early stage low-density expanded type leak stopping slurry；
Later stage high-density sealed type leak stopping slurry is made up of the component of following parts by weight: portland cement 20-30
Part, sodium polyacrylate crosslinked copolymer particles 5-10 part, flax fiber 5-15 part, medium sand 15-20 part, water
5-10 part；Each component is weighed by its parts by weight, mixes, after wet milk grinds, send into agitator, so
Rear interpolation UNF-5 type high efficiency water reducing agent, UNF-5 type high efficiency water reducing agent accounts for the 7%-9% of said components gross weight,
Obtain later stage high-density sealed type leak stopping slurry.
Wherein, sawdust fallen particulate matter in being the timber course of processing.
Further, described sodium polyacrylate crosslinked copolymer particles, its preparation method comprises the following steps:
1. by acrylates: water is the ratio mixing of 1:4 in mass ratio, makes acrylic acid brine solution；
2. by sodium hydroxide: acrylic acid: water is the ratio mixing of 1:2:5 in mass ratio；
3. by sodium peroxydisulfate or Ammonium persulfate.: water is the ratio mixing of 1:14 in mass ratio；
4. by step 1. in the acrylic acid brine solution that obtains and step 2., the solution equal-volume that 3. obtains of step
Mixing is placed in stainless steel reactor reaction 40-60min, and reaction temperature is 75 DEG C, obtains gel state fluid；
5. gel state fluid and the medium sand that modulus of fineness is 3.0 ratio for 1:8 in mass ratio mixes, and obtains
Containing mastic body；
6. will contain in mastic body injected plastic mould, the square groove of mould eyelet a size of 3-10mm,
Mould is placed on outdoor dry in the sun, is dried at normal temperatures, after the demoulding, i.e. can get foursquare sodium polyacrylate
Crosslinked copolymer particles.
Further, described composite filler is polyflon, and composite consolidation agent is that first is coagulated.
Further, described sawdust particle diameter is 8-10mm.
Further, a length of 3-5cm of described flax fiber.
Further, described medium sand particle diameter is 0.35-0.5mm.
Further, described early stage low-density expanded type leak stopping slurry and later stage high-density sealed type leak stopping are starched
Absolute viscosity is 115-120mPa s.
The polypropylene cross-linked copolymer fiber concrete leak stopping that the present invention provides is starched following beneficial effect:
(1) material of the present invention is simple, mainly with portland cement, sodium polyacrylate cross-linked copolymer, sand,
Flax fiber is material, the characteristic that sodium polyacrylate commissure copolymer expands after meeting water, can effectively block hidden
Cover large fracture gap, mortar leakage prevention, reduce cement mortar loss amount, and the environmental pollution damage that mortar leakage prevention brings.
(2) bridge joint blocking method and chemical plugging are combined by the present invention, reduce leak stopping risk, improve
Plugging effect, cost is relatively low simultaneously.
Detailed description of the invention
Embodiment 1
Polypropylene cross-linked copolymer fiber concrete leak stopping slurry include: early stage low-density expanded type leak stopping slurry and after
Phase high-density sealed type leak stopping is starched；
Wherein, early stage low-density expanded type leak stopping slurry is made up of the component of following parts by weight: composite filler
Polyflon 3 parts, composite consolidation agent first coagulate 5 parts, sodium polyacrylate crosslinked copolymer particles 2.5 parts,
The flax fiber of a length of 3-5cm 5 parts, particle diameter are 1 part of the sawdust of 8-10mm, 83.5 parts of water；Will be each
Component is weighed by its parts by weight, mixing, sends into agitator, then add UNF-5 after wet milk grinds
Type high efficiency water reducing agent, UNF-5 type high efficiency water reducing agent accounts for the 7%-9% of said components gross weight, makes serosity absolute
Viscosity 120mPa s, obtains early stage low-density expanded type leak stopping slurry；
Later stage high-density sealed type leak stopping slurry is made up of the component of following parts by weight: portland cement 20 parts,
Sodium polyacrylate crosslinked copolymer particles 10 parts, the flax fiber 10 parts of a length of 3-5cm, particle diameter are
The medium sand of 0.35-0.5mm 15 parts, 10 parts of water；Each component is weighed by its parts by weight, mixes, through wet
Agitator sent into by grinding machine after grinding, then add UNF-5 type high efficiency water reducing agent, UNF-5 type high efficiency water reducing agent
Account for the 7%-9% of said components gross weight, make serosity absolute viscosity 118mPa s, obtain later stage high-density sealed
Type leak stopping is starched.
The preparation method of described sodium polyacrylate crosslinked copolymer particles:
1. by acrylates: water is the ratio mixing of 1:4 in mass ratio, makes acrylic acid brine solution；
2. by sodium hydroxide: acrylic acid: water is the ratio mixing of 1:2:5 in mass ratio；
3. by sodium peroxydisulfate or Ammonium persulfate.: water is the ratio mixing of 1:14 in mass ratio；
4. by step 1. in the acrylic acid brine solution that obtains and step 2., the solution equal-volume that 3. obtains of step
Mixing is placed in stainless steel reactor reaction 40-60min, and reaction temperature is 75 DEG C, obtains gel state fluid；
5. gel state fluid and the medium sand that modulus of fineness is 3.0 ratio for 1:8 in mass ratio mixes, and obtains
Containing mastic body；
6. will contain in mastic body injected plastic mould, the square groove of mould eyelet a size of 3-10mm,
Mould is placed on outdoor dry in the sun, is dried at normal temperatures, after the demoulding, i.e. can get foursquare sodium polyacrylate
Crosslinked copolymer particles.
Specific construction technological process, comprises the following steps:
(1) boring and deviational survey
Using small-bore geology slewing drilling machine, diamond bit is holed, and uses two-point method earth anchorage before perforate,
Rig vertical shaft is corrected with bevel protractor and circumferentor；
(2) bore flushing and simple setting-out
Using water under high pressure pulsation to rinse, washing time is 30-60min, then returns clear water 10min；Before grouting
All carry out simple packer permeability test, it is ensured that setting-out pressure is 1.0MPa；
(3) slurrying and detection
Concentration of slurry uses the detection of standard funnel viscometer；Fineness mainly uses sedimentation, uses laser particle analyzer
Check；
(4) grouting
First perfusion early stage low-density expanded type leak stopping slurry, flax fiber, sawdust in serosity can be by large fracture holes
Footpath reduces, can quickly implantation, at short notice expansion 100 times containing sand sodium polyacrylate cross-linked polymer granule
Above, closure large fracture；
After 4 hours, treat the abundant expansion plugging large fracture in early stage serosity, carry out later stage high-density sealed type and block up
The perfusion of spillage, filling limit, limit adds the fine sand that 20-30% particle diameter is 0.1-0.25mm in hole, until slurry is returned in aperture；
For accelerating grout cures, it is to avoid serosity runs off too remote along crack, can add accelerator and make it solidify in serosity,
Wherein, accelerator is waterglass or the calcium chloride of 2%-4% of 1%；
(5) aperture irrigation gravel, coarse sand
With clear water in aperture in hole successively irrigation gravel, coarse sand so that it is along flow in fracture, accumulation, blocking
Passage, reduces speed of seepage flow, forms anti-filter, sets up the stagnant slurry of plasma resistance；Wherein, the particle diameter of gravel is 2-5mm,
The particle diameter of coarse sand is 0.5-2mm.
Embodiment 2
Polypropylene cross-linked copolymer fiber concrete leak stopping slurry include: early stage low-density expanded type leak stopping slurry and after
Phase high-density sealed type leak stopping is starched；
Wherein, early stage low-density expanded type leak stopping slurry is made up of the component of following parts by weight: composite filler
Polyflon 4 parts, composite consolidation agent first coagulate 4 parts, sodium polyacrylate crosslinked copolymer particles 3 parts,
The flax fiber of a length of 3-5cm 6 parts, particle diameter are 1 part of the sawdust of 8-10mm, 82 parts of water；By each group
Divide by the weighing of its parts by weight, mixing, after wet milk grinds, send into agitator, then interpolation UNF-5 type
High efficiency water reducing agent, UNF-5 type high efficiency water reducing agent accounts for the 7%-9% of said components gross weight, makes serosity the most viscous
Degree is 118mPa s, obtains early stage low-density expanded type leak stopping slurry；
Later stage high-density sealed type leak stopping slurry is made up of the component of following parts by weight: portland cement 25 parts,
Sodium polyacrylate crosslinked copolymer particles 8 parts, the flax fiber 15 parts of a length of 3-5cm, particle diameter are 0.35-0.5
The medium sand of mm 20 parts, 8 parts of water；Each component is weighed by its parts by weight, mixes, grind through wet milk
Rear feeding agitator, then adds UNF-5 type high efficiency water reducing agent, and UNF-5 type high efficiency water reducing agent accounts for above-mentioned
The 7%-9% of component weight, making serosity absolute viscosity is 120mPa s, obtains later stage high-density sealed type leak stopping
Slurry；
Embodiment 2 is with the difference of embodiment 1, and the parts by weight of the component of composition leak stopping slurry are different,
Remaining operation is the most identical.
Embodiment 3
Polypropylene cross-linked copolymer fiber concrete leak stopping slurry include: early stage low-density expanded type leak stopping slurry and after
Phase high-density sealed type leak stopping is starched；
Wherein, early stage low-density expanded type leak stopping slurry is made up of the component of following parts by weight: composite filler
Polyflon 5 parts, composite consolidation agent first coagulate 4 parts, sodium polyacrylate crosslinked copolymer particles 2.5 parts,
The flax fiber of a length of 3-5cm 5 parts, particle diameter are 0.5 part of the sawdust of 8-10mm, 83 parts of water；Will be each
Component is weighed by its parts by weight, mixing, sends into agitator, then add UNF-5 after wet milk grinds
Type high efficiency water reducing agent, UNF-5 type high efficiency water reducing agent accounts for the 7%-9% of said components gross weight, makes serosity absolute
Viscosity is 115mPa s, obtains early stage low-density expanded type leak stopping slurry；
Later stage high-density sealed type leak stopping slurry is made up of the component of following parts by weight: portland cement 30 parts,
Sodium polyacrylate crosslinked copolymer particles 5 parts, the flax fiber 10 parts of a length of 3-5cm, particle diameter are 0.35-0.5
The medium sand of mm 18 parts, 5 parts of water；Each component is weighed by its parts by weight, mixes, grind through wet milk
Rear feeding agitator, then adds UNF-5 type high efficiency water reducing agent, and UNF-5 type high efficiency water reducing agent accounts for above-mentioned
The 7%-9% of component weight, making serosity absolute viscosity is 120mPa s, obtains later stage high-density sealed type leak stopping
Slurry；
Embodiment 3 is with the difference of embodiment 1, and the parts by weight of the component of composition leak stopping slurry are different,
Remaining operation is the most identical.
Engineer applied:
Certain dam foundation is deep covering layer ground, uses grout curtain, projected depth 65m.Send out during 18m
Raw micro-leakage, leakage speed 5m3/h；Severe circulation loss, leakage speed 80m is there is when being drilled into well depth 25m3When/h, 37m,
There is the leakage of the mistake property returned, be tentatively judged as that Deposit in Limestone Fractures is missed.Clear water is used to be drilled into by force well depth 45m subsequently,
Miss 821m altogether3.During strong brill, there are 3 emptying phenomenons in 18-45m section, it is judged that miss for Caves.
Successively use the multiple blocking methods such as bridge blinding slurry, cementing to carry out repeatedly blocking construction, due to stratum for this
Complexity, leakage is serious, still walks construction requirement under not met.For improving lost-circulation zone bearing capacity, it is ensured that well cementation
Quality, the intumescent leak stopping slurry using the present invention to prepare carries out pressurization sealing construction to 18-45m section.
Site operation is divided into 3 stages along drilling depth: first stage 18-25m；Second stage 25-37m；
Phase III 37-45m.
First stage 18-25m:
Polish drill rod, down to well depth 25m, irrigates 32m3Low-density expanded type leak stopping slurry in embodiment 1, note is stifled
During spillage, pump pressure is gradually increased to 1Mpa, with clear water for slurry 5m3, during slurry, pump pressure gradually rises
To 3MPa, after terminating for slurry, rise and be drilled into well depth 18m, return slurry 4.5m3。
After 4 hours, irrigate 25m3High-density sealed type leak stopping slurry in embodiment 1, during note leak stopping slurry,
Pump pressure is gradually increased to 1MPa, with clear water for slurry 6m3, it is gradually increased to 1MPa for pump pressure during slurry, for slurry
After end, act being drilled into well depth 18m and wait solidifying, return slurry 2.3m3。
Second stage 25-37m:
Polish drill rod, down to well depth 37m, irrigates 80m3Low-density expanded type leak stopping slurry in embodiment 2, note is stifled
During spillage, pump pressure is gradually increased to 1Mpa, with clear water for slurry 12m3, during slurry, pump pressure is gradually
Rise to 3MPa, after terminating for slurry, rise and be drilled into well depth 25m, return slurry 1.5m3。
After 4 hours, irrigate 32m3High-density sealed type leak stopping slurry in embodiment 2, during note leak stopping slurry,
Pump pressure is gradually increased to 1MPa, with clear water for slurry 8m3, it is gradually increased to 1MPa for pump pressure during slurry, for slurry
After end, act being drilled into well depth 18m and wait solidifying, return slurry 1.3m3。
Phase III 37-45m:
Polish drill rod, down to well depth 45m, irrigates 32m3Low-density expanded type leak stopping slurry in embodiment 3, note is stifled
During spillage, pump pressure is gradually increased to 1Mpa, after note leak stopping slurry terminates, rises and is drilled into well depth 37m, closed-in well
Shove 8m after 1h3。
Effect:
By check analysis, use the polypropylene cross-linked copolymer fiber concrete leak stopping slurry that the present invention prepares
The effect of leak stopping karst cavities in dam foundation type leakage section is obvious, and pressure-bearing meets requirement, and then is drilled into the 65m degree of depth and completes to fill
Slurry, has no significantly leakage.
Claims (6)
1. a polypropylene cross-linked copolymer fiber concrete leak stopping slurry, it is characterised in that include that early stage low-density expanded type leak stopping slurry and later stage high-density sealed type leak stopping are starched；
Wherein, early stage low-density expanded type leak stopping slurry is made up of the component of following parts by weight: composite filler 3-5 part, composite consolidation agent 4-5 part, sodium polyacrylate crosslinked copolymer particles 2.5-3 part, flax fiber 5-6 part, sawdust 0.5-1 part, water 80-85 part；Each component being weighed by its parts by weight, mix, send into agitator, then add UNF-5 type high efficiency water reducing agent after wet milk grinds, UNF-5 type high efficiency water reducing agent accounts for the 7%-9% of said components gross weight, obtains early stage low-density expanded type leak stopping slurry；
Later stage high-density sealed type leak stopping slurry is made up of the component of following parts by weight: portland cement 20-30 part, sodium polyacrylate crosslinked copolymer particles 5-10 part, flax fiber 5-15 part, medium sand 15-20 part, water 5-10 part；Each component being weighed by its parts by weight, mix, send into agitator, then add UNF-5 type high efficiency water reducing agent after wet milk grinds, UNF-5 type high efficiency water reducing agent accounts for the 7%-9% of said components gross weight, obtains later stage high-density sealed type leak stopping slurry；
Described sodium polyacrylate crosslinked copolymer particles, its preparation method comprises the following steps:
1. by acrylates: water is the ratio mixing of 1:4 in mass ratio, makes acrylic acid brine solution；
2. by sodium hydroxide: acrylic acid: water is the ratio mixing of 1:2:5 in mass ratio；
3. by sodium peroxydisulfate or Ammonium persulfate.: water is the ratio mixing of 1:14 in mass ratio；
4. by step 1. in the acrylic acid brine solution that obtains and step 2., the solution equal-volume that 3. obtains of step mix and be placed in stainless steel reactor reaction 40-60min, reaction temperature is 75 DEG C, obtains gel state fluid；
5. gel state fluid and the medium sand that modulus of fineness is 3.0 ratio for 1:8 in mass ratio mixes, and obtains containing mastic body；
6. will contain in mastic body injected plastic mould, the square groove of mould eyelet a size of 3-10mm, mould is placed on outdoor dry in the sun, is dried at normal temperatures, after the demoulding, i.e. can get foursquare sodium polyacrylate crosslinked copolymer particles.
A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry the most according to claim 1, it is characterised in that described composite filler is polyflon, composite consolidation agent is that first is coagulated.
A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry the most according to claim 1, it is characterised in that described sawdust particle diameter is 8-10mm.
A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry the most according to claim 1, it is characterised in that a length of 3-5cm of described flax fiber.
A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry the most according to claim 1, it is characterised in that described medium sand particle diameter is 0.35-0.5mm.
A kind of polypropylene cross-linked copolymer fiber concrete leak stopping slurry the most according to claim 1, it is characterised in that the absolute viscosity of early stage low-density expanded type leak stopping slurry and later stage high-density sealed type leak stopping slurry is 115-120mPa s.
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| CN104946213A (en) * | 2015-07-14 | 2015-09-30 | 桂林市和鑫防水装饰材料有限公司 | Efficient waterproof leakage stopping agent |
| CN104973838B (en) * | 2015-07-16 | 2017-10-10 | 深圳市广汇源水利勘测设计有限公司 | A kind of concrete blocked for constructional engineering drain reserved holes of pipes |
| CN108102620A (en) * | 2017-12-10 | 2018-06-01 | 常州市雄图纺织有限公司 | A kind of Granular Postponed-Swelling LCM |
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| US8784558B2 (en) * | 2011-05-26 | 2014-07-22 | Premier Magnesia, Llc | Admixtures for shrink crack reduction of portland cement-based mortars and concretes |
| CN103740348A (en) * | 2013-12-31 | 2014-04-23 | 东营泰尔石油技术有限公司 | Leaking stoppage reinforcing agent |
| CN103773339B (en) * | 2013-12-31 | 2016-02-24 | 东营泰尔石油技术有限公司 | High-density consolidation type plugging agent |
| CN103740351B (en) * | 2013-12-31 | 2016-08-17 | 东营泰尔石油技术有限公司 | Low-density consolidation type sealing agent |
| CN104232039B (en) * | 2014-09-22 | 2017-11-10 | 中国石油天然气股份有限公司 | Multi-element synergistic plugging agent and application thereof |
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