CN106122616A - A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe - Google Patents
A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe Download PDFInfo
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- CN106122616A CN106122616A CN201610688438.2A CN201610688438A CN106122616A CN 106122616 A CN106122616 A CN 106122616A CN 201610688438 A CN201610688438 A CN 201610688438A CN 106122616 A CN106122616 A CN 106122616A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 32
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005530 etching Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 102
- 239000010959 steel Substances 0.000 claims abstract description 102
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 80
- 239000004567 concrete Substances 0.000 claims abstract description 40
- 239000011241 protective layer Substances 0.000 claims description 39
- 238000004519 manufacturing process Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 12
- 239000004574 high-performance concrete Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 5
- 230000010412 perfusion Effects 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 2
- 230000035699 permeability Effects 0.000 abstract description 5
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- 239000004570 mortar (masonry) Substances 0.000 description 44
- 239000000835 fiber Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 239000011083 cement mortar Substances 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 238000004220 aggregation Methods 0.000 description 9
- 230000002776 aggregation Effects 0.000 description 9
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- 238000007667 floating Methods 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
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- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
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- 206010010356 Congenital anomaly Diseases 0.000 description 1
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- 241000196324 Embryophyta Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
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- 235000020188 drinking water Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012681 fiber drawing Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/153—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and concrete with or without reinforcement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/06—Coatings characterised by the materials used by cement, concrete, or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe, uses the ultra-high performance concrete bonding of high deformability to cover and protection steel cylinder, compressor wire, bellmouth steel loop and socket steel ring not corrosion, and protects for concrete lining.Ultra-high performance concrete used in the present invention possesses the physical and mechanical property of excellence; including high deformation and high anti-crack ability, high-tensile, high bond strength, high tenacity; and high permeability resistant energy, high resist chemical performance and high anti-freezing melt performance superelevation durability; can be that lined Prestressed concrete cylinder pipe provides reliable, long-acting anti-corrosion protection; increase substantially durability and the operational reliability of this kind of pipeline, ensure and realize such tubing is laid the desired long service live of pipeline (75～100 years).
Description
Technical field
The present invention relates to a kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe, become in particular by height
The ultra-high performance concrete of shape ability, in corrosive atmosphere in protective conduit in the long-term not corrosion of steel and protection concrete
Lining is from corrosion in water.
Background technology
Prestressed concrete cylinder pipe (Prestressed Concrete Cylinder Pipe is called for short PCCP) is a kind of
Water transferring line, originates from France, and the forties in last century, America and Europe started development, the eighties start development in China and apply.
PCCP is to be wound around compressor wire by the high-strength concrete tube core of band steel cylinder, then sprays the structure with cement mortar protective course
Become；Welded together with steel bell and spigot and steel cylinder, the groove on bell and spigot and cushion rubber form slidingtype flexible joint.PCCP presses
Structure (steel cylinder position in tube core) is divided into lined Prestressed concrete cylinder pipe (being called for short PCCPL) and embed-type prestressing force
Cylinder concrete pipe (is called for short PCCPE).PCCPL, using thin steel cylinder inner lining concrete as tube core, is then wound around ring outside thin steel cylinder
To compressor wire and make mortar cover, it is suitable for the pipeline of bore DN400～1200mm.PCCPE is embedding with thin steel cylinder
In pipe of concrete in-core, outside concrete tube core, then it is wound around ring orientation prestress steel wire and makes mortar cover, being suitable for mouth
The pipeline of footpath DN1400～4000mm.The present invention is directed to lined Prestressed concrete cylinder pipe (PCCPL).
PCCP is the compound tubing that steel plate, concrete, high tensile steel wire and cement mortar different materials combine, and has
Steel and the respective characteristic of concrete, including can bear external pressure in height, rigidity big, impervious strong, seal tight, easy for installation, anti-
The features such as shock stability is good, operation and maintenance cost is low, thus long distance water transfer main, urban water supply and industry at home and abroad has
Pressure water (including general power plant, nuclear power station), pressure inverted-siphon, sewage pressure main, submarine pipeline (clean water or saline), overflow
The engineerings such as flow tube are widely adopted.For large-scale water transmission pipeline, PCCP is compared with steel pipe, ductile iron pipe, and advantage is system
Make low cost, and anticorrosive low with maintenance cost.
The U.S. once assessed, and the service life of PCCP was in 75～100 years.But, application so far, the durability of PCCP and can
Increasingly be under suspicion by property.Famous " the big race in the Africa " engineering built the eighties in last century, has sent out during by 2005
Raw 5 PCCP explosion；Part pipeline is through detection, and oneself, it is found that steel wire fracture 3500, is badly in need of carrying out positive rehabilitation plan.
This engineering now, thousands of joint PCCP pipeline sections need repairing or change, and remaining pipeline needs to carry out state estimation.Last century 90
Since age, there is a plurality of PCCP pipeline generation booster event in the U.S., reduces people to PCCP durability and the letter in service life
The heart." PCCP manages the highest failure likelihood and the calamity of inefficacy, has caused the U.S.'s the most not reproduction PCCP pipe ".In
State the most also there occurs the PCCP pipeline of the raw booster of a lot of PCCP pipeline burst event, bob, and the time put into effect is only
There are 3～5 years.Additionally, to running the detection discovery that pipeline is carried out, compressor wire " fracture of wire " is PCCP Common Diseases and hidden danger.
Investigation to all booster events all shows, compressor wire corrosion is broken, and makes PCCP bear intrinsic pressure ability big
Amplitude reduction, is the immediate cause that booster occurs.Wire quality difference and (or) mortar cover lost efficacy then compressor wire rust
Erosion, then be the steel wire main cause of breaking (fracture of wire).Having its source in of problem, embed-type Prestressed concrete cylinder pipe standard gauge
The mortar cover crack-resisting design of model, check method " deflection " it is assumed that have larger difference with reality." deflection " is false
If viewpoint is thought, protective layer will be produced, by higher than the stretching of mortar tensile strength, the microcrack that naked eyes can not be shown in；Split seen from and
Seam deflection is 8 times of microcrack, and now the virtual tension stress of protective layer is mortar tensile strength 8 times.Standard regulation protection
Slabbing seam check method, uses the deflection of suitable 6.4～8 times of cement mortar tensile strength or virtual tension stress, if interior
Deflection or tension stress that outer load produces assume deflection or virtual tension stress less than this, and protective layer crack is just checked
Can pass through.Such protective layer crack check perform practically no function, " PCCP standard specify, mortar cover be not allow for any can
Seeing crack, all cracks of practical situation mortar cover are inevitable ".It is to say, PCCP pipe mortar cover cracking and
Cannot effectively protect compressor wire, be because mortar deformation itself and anti-crack ability is not enough, and sand has been put up with in the design of pipe
Slurry performance, to such an extent as to cause PCCP(PCCPE and PCCPL to manage) there is the defect that congenital durability is not enough.Big in the temperature difference, be dried and
Corrosive atmosphere, this defect is fatal, compressor wire can very fast corrosion, break and booster occur.This Ye Shi U.S. washes in a pan
Eliminate the basic reason of PCCP.
The present invention manages the root of this defect just for PCCPL, it is provided that reliable solution, extensive application value weight
Greatly.China produces a large amount of and use PCCPL at present, and this heavy caliber pipe is often used for large-scale water delivery or pressure drainage work
Journey.These engineerings are projects of vital and lasting importance, do not allow booster occurs or there is potential hidden danger；Once there is problem, the loss brought
To be huge.People have also realised that, the mortar cover currently used cannot ensure durability and the safety of PCCPL
Property, need relatively reliable technical scheme.
Technical solution of the present invention, uses and has high deformation and high anti-crack ability, high-tensile ultra-high performance concrete
(UHPC), replacement ordinary mortar, as steel cylinder, steel wire and the bell and spigot steel loop protective layer of PCCPL, can be inherently eliminated tradition
The defect that mortar cover deformation is not enough with cracking resistance；Meanwhile, UHPC high bond strength, high tenacity, high impact properties are utilized
Energy, high permeability resistant energy and good corrosion resistance, can avoid mortar cover hollowing, easy damaged and corrosion resistance deficiency etc. to ask
Topic.UHPC protective layer can provide protection reliably and with long-term for compressor wire and bell and spigot steel loop, significantly promotes PCCPL's
Durability and service life.Additionally, PCCPL has been also used for pressure sewage or corrosive liquid conveyance conduit, concrete lining can be subject to
Reduce service life to chemical attack.For such problem, the present invention makes UHPC protective layer protection PCCPL at inside pipe wall and mixes
Solidifying soil liner.
Ultra-high performance concrete (Ultra-High Performance Concrete is called for short UHPC), because typically need to mix
Enter steel fibre or high-strength polymer fiber, also referred to as very-high performance fibre reinforced concrete (Ultra-High
Performance Fibre Reinforced Concrete, is called for short UHPFRC).UHPC belongs to modern advanced material, innovates
Cement-based material (concrete or mortar) and fiber, the composite mode of steel (reinforcing bar or high strength wire), significantly carry
High fiber and reinforcing bar intensity utilization ratio in concrete, make all round properties of cement-based material there occurs that great-leap-forward enters
Step has possessed that superelevation is strong, high tenacity and superelevation durability.
" the superelevation mechanical property " of UHPC be mainly reflected in superelevation tensile strength (uniaxial tension and bending and tensile strength) and
High tenacity, this relies on the short steel fibre of addition to realize.Tensile strength may be up to 30MPa, and energy to failure reaches 1,500 ~ 40,000 N/
M(steel fibre volume content 2% ~ 12%), make UHPC stride into toughness, (energy to failure is more than 1,000J/m for the ranks of high-toughness material2Draw
It is divided into toughness material).In terms of deformability, UHPC can realize the apparent of stretching in relatively low content of steel fiber level
" strain hardening " behavior, i.e., there are many microcracks in single shaft tension experience elastic stage, and fiber drawing-resistant function starts；Should with post-tensioning
Power rises, and enters the stiff strain hardening stage (" surrenders " of similar steel)；After reaching cracking, (tension is strong for maximum tension stress
Degree), indivedual crack occurs in local expansion, tension declines afterwards, enters softening stress-displacement stage.Steel fibre intensity obtains effective profit
With, UHPC thus obtain the highest cracking resistance and impact resistance.
Another performance of UHPC most captivation is potential superelevation durability.Theoretically with according to test so far
Result of study, substantially may determine that: UHPC does not has freeze-thaw cycle, alkali-aggregate reaction (AAR) and delayed ettringite formation
(DEF) problem destroyed；In uncracked condition, the intrusion of the anti-carbonation of UHPC, resisting chloride ion penetration, resisting erosion of sulfate, anti-chemistry corruption
Erosion, the endurance quality index such as wear-resisting, compared with tradition high-strength high-performance concrete (HSC/HPC), have carrying of the order of magnitude or multiple
High.UHPC has extraordinary microcrack self-healing ability.Owing to water-cement ratio is the lowest, UHPC mixes and stirs the water yield and is only capable of for part of cement
Aquation, the inside of most cement granules is in does not has hydrated state.Therefore, water or steam enter the crack of UHPC, expose
The unhydrated part of cement granules in fracture faces " will continue " aquation；The hydrated product volume combining outside moisture is more than
Cement is somehow volume, and additional volume can cram crack.Test and engineering verification show, the crack self-healing of UHPC can not only
Enough close microcrack reduce permeability and keep good durability, the most also play the effect of " cementing " crack, the most extensive
The mechanical property that multiple concrete reduces because of crack.
Ultra-high performance concrete used in the present invention (UHPC), possess high deformation and high anti-crack ability, high-tensile,
High tenacity, high impact resistance, high permeability resistant, high-durability and crack self-healing performance；With concrete and the interfacial adhesion of steel
Intensity is the highest, is the anti-corrosion protection material of preferable PCCPL pipe；The protective layer made of it, working life is up to hundred
More than Nian, it it is long-effective corrosion etching method.
Classifying from aggregate size, UHPC is also mortar or extraordinary mortar.UHPC mix rheological characteristic can be prepared high with common
Strength mortar is similar to, and directly uses existing weaponry and equipment roller to penetrate, spray or smear slurry and makes protective layer；Hardening capacity excellent for UHPC is utilized to protect
Protect the steel such as the compressor wire within PCCPL, steel cylinder, bell and spigot steel loop, and concrete lining, be a kind of easily implement, can
Lean on, long-acting anti-corrosion method, can significantly promote durability and the working life of PCCPL.
The implementation of prior art
Prestressed concrete cylinder pipe (PCCPL) occurs premature failure or durability bad, and main cause is the prestressing force of PCCPL
Steel wire and steel cylinder corrosion；Also there is small part PCCPL initial failure to be because quality of production defect, use grade defective, improper
Or the steel of kind, (excessive extra current may cause metal toughness or ductility fall because of liberation of hydrogen excessively to use cathodic protection
Low, i.e. " hydrogen embrittlement ").Now, standard criterion, such as GB/T 19685-2005 " Prestressed concrete cylinder pipe ", PCCP is produced matter
Amount, use steel and mortar cover to have to clearly require (cracking resistance requires to have put up with the performance that mortar can reach)； GB
28725-2012 " cathodic protection in buried Prestressed concrete cylinder pipe road " then specification, instruct and to improve PCCPL etch-proof
Cathodic protection level.But, the mortar cover of PCCPL remains the weak link of its durability.Mortar cover self is opened
Split inevitable, and in transporting and hoisting process easy damaged, resisting chloride ion penetration invades and resistance to chemical attack is not enough.Big in the temperature difference,
Be dried, drying and watering cycle and corrosive atmosphere (soil or subsoil water more generally exist sulfate, villaumite or sour corrosion), and interior
Under external pressure effect, mortar the most seriously ftractures and very fast deterioration, loses the protective effect to compressor wire, steel cylinder etc..
Mortar cover lost efficacy, the load of cathodic protection will significantly increase, so uncontrollable compressor wire, steel cylinder corrosion climing
Prolong.
Requirement can be met for PCCPL mortar cover cracking resistance, corrosion resistance, and the anti-chemistry of concrete lining is rotten
Erosion scarce capacity, also has some patents to propose Improving Measurements, Qi Zhongyou:
There is the lined Prestressed concrete cylinder pipe of fibre crack-resistance mortar cover on CN201220309638.X(surface): should
Utility model method relies on and mixes polypropylene fibre raising mortar cracking resistance in mortar.
CN201210162978.9(galvanizing is combined lined prestress steel cylinder concrete with epoxide coal bituminous anticorrosion
Pipe), CN201210220592.9(long-life multi-layer anticorrosion process lined Prestressed concrete cylinder pipe),
CN201310190348.7(inwall has the lined Prestressed concrete cylinder pipe of epoxy protective layer),
CN201510603804.5(full anticorrosive direct drinking-water lined Prestressed concrete cylinder pipe), CN201510604002.6(length
Life-span full antiseptical lined Prestressed concrete cylinder pipe): these inventive methods, anticorrosive measure includes steel cylinder and steel wire
Zinc-plated, inner liner stainless steel steel cylinder or PVC, inwall coating epoxy coating, pipe outer wall coating bituminous epoxy coating, bellmouth steel loop and insert
Mouth steel loop coating corrosion-inhibiting coating or zinc-aluminium rare earth coating, mortar cover admixture polypropylene fibre raising cracking resistance, etc., with
And these measures of compound use.
The PCCP power plant cooling water cylinder concrete pipe of CN201310187286.4(band anticorrosive coat and production method): should
Inventive method, while the last operation of whitewashing together that traditional PCCP pipeline produces, uses scraping device by the water after whitewashing
Cement mortar surface strikes off, simultaneously after the device of underflow of cementing of follow-up cement mortar is coated with strike off after crude pipe surface,
The cement mortar that pipe surface is coated with by the pressurization floating device followed up the most afterwards is the most floating, afterwards after pipeline parches completely, at pipe
Surface, road uses the method coating epoxy resin of machinery and is wound around glass fibre, uses mechanical means to scrape floating whole simultaneously, to be coated
It is production tube after the epoxy resin fiberglass protective layer solidification covered.
The Prestressed concrete cylinder pipe of CN201310187303.4(band epoxy mortar protective layer and production method): should
Inventive method, while the last operation of whitewashing together that traditional PCCP pipeline produces, uses scraping device by the water after whitewashing
Cement mortar surface strikes off, simultaneously after the device of coating epoxy resin of follow-up epoxy resin is coated with strike off after crude pipeline table
Face, more afterwards follow-up epoxy mortar coating unit by epoxy mortar coating and epoxy resin surface pressurize floating simultaneously.
CN201310187328.4(Novel seepage PCCP Prestressed concrete cylinder pipe and production method): this invented party
Method, while the last operation of whitewashing together that traditional PCCP pipeline produces, uses scraping device by the cement mortar after whitewashing
Surface strikes off, simultaneously after the device of underflow of cementing of follow-up cement mortar is coated with strike off after crude pipe surface, then heel
The cement mortar that pipe surface is coated with by the pressurization floating device entered is the most floating.
In said method, polypropylene fibre can only improve mortar hardening stage anti-crack ability, i.e. prevents from or reduce mortar moulding
Property contraction fissure；Polypropylene fibre can not improve the cracking resistance of hardened mortar, because its elastic modelling quantity is the lowest, it is impossible to constraint
The crack of hardened mortar；Additionally, the method does not improve impermeability and the resistance to corrosion of mortar.Mortar cover surface-coated
Epoxy resin fiberglass anticorrosive coat, bituminous epoxy coating etc., can completely cut off mortar with corrosive environment；Steel cylinder and wire galvanization,
Bell and spigot steel loop coating anticorrosive paints etc., can delay the generation of corrosion.Can these anti-corrosion methods extensively be applied, and depends on into
Originally with antiseptic effect or cost performance.
Summary of the invention
It is an object of the invention to provide a kind of reliable, long-acting for lined Prestressed concrete cylinder pipe (PCCPL)
Anti-corrosion method.
The technical scheme is that a kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe, liner
Outside formula Prestressed concrete cylinder pipe body and Pipe installing is followed by the exposed parts of cephalic groove channel-section steel material, including steel cylinder, pre-
Stress wire, bellmouth steel loop and socket steel ring, be respectively adopted factory and make ultra-high performance concrete external protection and field fabrication
The inside and outside protective layer of ultra-high performance concrete is protected；The concrete lining inwall of pipe, uses the ultra-high performance concrete that factory makes
Inner protective layer is protected.
In the production process of pipe, the factory making 20～50mm thickness outside steel cylinder and compressor wire makes superelevation
Can concrete external protection.
In the production process of pipe, the concrete lining inwall at pipe makes the factory of 15～30mm thickness and makes very-high performance
Concrete inner protective layer.
After Pipe installing is in place, fill field fabrication ultra-high performance concrete inner protective layer in pipe joint internal channel, viscous
Knot covers bellmouth steel loop and socket steel ring exposed parts.
After Pipe installing is in place, protect outside the perfusion of pipe joint outer channel and filling field fabrication ultra-high performance concrete
Layer, bonding covers socket steel ring and bellmouth steel loop exposed parts.
In factory and the inside and outside protective layer of field fabrication ultra-high performance concrete, the hardening of used ultra-high performance concrete
Performance reaches standard curing 28 days: comprcssive strength is more than or equal to 120MPa, and elasticity tensile strength is more than or equal to 6MPa, tension
Intensity is more than or equal to 7MPa, and ultimate tensile strength is more than or equal to 1.0 ‰.
Implementation is as follows:
1, ultra-high performance concrete is prepared: adhesive aggregation type mix is suitable for roller and penetrates, sprays or smear slurry equipment making protective layer；Pipeline is pacified
The ultra-high performance concrete mix that dress uses, is divided into adhesive aggregation type and self-compacting type concrete, and wherein self-compacting type concrete is used for joint outer channel
The perfusion of bottom.The hardening capacity (standard curing 28 days) of ultra-high performance concrete to reach: comprcssive strength is more than or equal to
120MPa, elasticity tensile strength (just splitting tension) is more than or equal to 6MPa, and tensile strength (ultimate tensile stress) is more than or equal to
7MPa, ultimate tensile strength is more than or equal to 1.0 ‰.
2, in the production process of pipe, the factory making 20～50mm thickness outside steel cylinder and compressor wire makes superelevation
Performance concrete external protection bonding covers；The factory making 15～30mm thickness at concrete lining inwall makes very-high performance
Concrete inner protective layer；Steam curing or room temperature moisture-keeping maintaining.
3, after Pipe installing is in place, fill adhesive aggregation type ultra-high performance concrete in pipe joint internal channel, form scene system
Make ultra-high performance concrete inner protective layer, complete bonding and cover bellmouth steel loop and socket steel ring exposed parts, room temperature moisture-keeping maintaining.
4, irrigating ultra-high performance concrete mix bottom pipe joint outer channel, joint outer channel side and top are filled out
Fill adhesive aggregation type ultra-high performance concrete mix, form field fabrication ultra-high performance concrete external protection, complete bonding and cover
Socket steel ring and bellmouth steel loop exposed parts, room temperature moisture-keeping maintaining.
It is an advantage of the current invention that: prepared UHPC mix rheological characteristic is similar with ordinary mortar, can be used directly existing
Equipment roller is penetrated, sprays or is smeared slurry and makes protective layer；Used ultra-high performance concrete (UHPC) possesses the physical mechanics property of excellence
Can, including high deformation and high anti-crack ability, high-tensile, high bond strength, high tenacity, high impact-resistance and high anti-
Ooze performance, high resist chemical performance and high anti-freezing and melt performance superelevation durability, for lined prestress steel cylinder concrete
Pipe (PCCPL) provides reliable, long-acting anti-corrosion protection, increases substantially durability and the reliability of this kind of pipeline, and guarantee makes
The pipeline laid with this tubing realizes desired long service live (75～100 years).
The present invention provides a kind of brand-new technical scheme, substitute tradition mortar with UHPC, the UHPC used possesses
Excellent mechanical property and durability, can protect the compressor wire within PCCPL, steel cylinder, bellmouth steel loop stably in a long term and insert
Mouth steel loop not corrosion, and concrete protection liner is from chemical attack.
Easy implementation and the reliability advantage of this technical scheme are embodied in: 1, can prepare UHPC mix rheological characteristic with common
Mortar is similar to, it is simple to directly use existing weaponry and equipment roller to penetrate, spray or smear external protection in slurry makes in factory, it is not necessary to change existing
Production technology；Meanwhile, self-compaction and adhesive aggregation type UHPC mix can be prepared in situ at Pipe installing, it is simple to irrigate and fill pipe
Road joint groove, bonding covers and protects bellmouth steel loop and socket steel ring exposed parts.2, UHPC mix has high cohesion,
With good adherence of concrete, steel wire, steel cylinder and steel loop surface, plant protection layer make efficiency can be improved, and improve Pipe installing
Field joint trench fill makes the efficiency of protective layer.3, the interface between hardening UHPC and concrete, steel cylinder, steel wire and steel loop
That adhesion strength, significantly larger than normal concrete, mortar can reach and between concrete, steel interface binding intensities, easily
In avoiding the occurrence of the defects such as hollowing.4, used in the present invention containing micro steel fiber UHPC, possess high deformation and high anti-crack ability,
High-tensile and high impact-resistance, it is possible to ensure PCCPL protective layer various mechanics loads (pipeline transportation lifting collision,
External and internal pressure effect) and environmental load (drying and watering cycle, variations in temperature) effect under globality.5, UHPC have high solidity,
High permeability resistant, good corrosion resistance and high anti-freezing melt performance, and UHPC itself is that in current all engineering materials, durability is best
Material (in natural environment more than working life a century, Japan's specification thinks 100 years UHPC arrangement works life-spans), therefore can be pre-
Stress wire, steel cylinder and bell and spigot steel loop and concrete lining provide protection reliably and with long-term.6, UHPC protective layer skill is used
Art scheme, in the face of salt-soda soil or ground water chemistry corrosion, it is no longer necessary to do corrosion-inhibiting coating, advantage of lower cost at pipe shaft.UHPC
Protective layer is compatible with cathode protection technology, and cathodic protection can be as standby measure.7, UHPC protective layer good combination property, reliability
Height, can be PCCPL compressor wire, steel cylinder and bell and spigot steel loop and concrete lining offer long life anti corrosion protection, significantly
Reduce pipeline performance maintenance and repair expense, the century-old engineering of achievement.8, the present invention solves PCCPL protective layer crack-resisting design, check
The difficult problem that the hypothesis of method is inconsistent with mortar material performance, eliminates the durability defect of PCCPL design from root.
Accompanying drawing explanation
Fig. 1 is a kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe of the present invention
1-steel cylinder；2-compressor wire；3-bellmouth steel loop；4-socket steel ring；5-factory makes and protects outside ultra-high performance concrete
Layer；6-1-field fabrication ultra-high performance concrete inner protective layer；6-2-field fabrication ultra-high performance concrete external protection；7-mixes
Solidifying soil liner；8-rubber ring；9-factory makes ultra-high performance concrete inner protective layer.
Specific implementation method
Lined Prestressed concrete cylinder pipe (PCCPL) steel cylinder, compressor wire, part bellmouth steel loop and part socket steel ring
Factory make ultra-high performance concrete external protection 5 and factory and make ultra-high performance concrete inner protective layer 9, make in factory
Complete.After Pipe installing is in place, joint bellmouth steel loop and the field fabrication ultra-high performance concrete of socket steel ring exposed parts
Inner protective layer 6-1 and field fabrication ultra-high performance concrete external protection 6-2, completes in Pipe installing field fabrication.Concrete step
Rapid as follows:
1, adhesive aggregation type ultra-high performance concrete is prepared in factory: newly mixing the mix slump is 30 ~ 100mm, applicable mechanical roller penetrates,
Spray or smear slurry and make protective layer.The hardening capacity (standard curing 28 days) of ultra-high performance concrete to reach: comprcssive strength is big
In or equal to 120MPa(100mm cube of test specimen), elasticity tensile strength is more than or equal to 6MPa(30mm thick plates test specimen), tension
Intensity is more than or equal to 7MPa, and ultimate tensile strength is more than or equal to 1.0 ‰.
2, in the production process of PCCPL, outside steel cylinder 1 and compressor wire 2, factory's system of 20～50mm thickness is made
Make ultra-high performance concrete external protection 5；The factory making 15～30mm thickness at concrete lining 7 inwall makes very-high performance
Concrete inner protective layer 9；Steam curing (90 DEG C of constant temperature 48 hours, heating-cooling speed is less than 15 DEG C/h) or room temperature moisturizing are supported
Protect at least 7 days.
3, on-the-spot at Pipe installing, prepare self-compacting type concrete and adhesive aggregation type ultra-high performance concrete, wherein self-compacting type concrete is used for
Perfusion bottom pipe joint outer channel.The hardening capacity of ultra-high performance concrete requires ibid.
4, after Pipe installing is in place, fill adhesive aggregation type ultra-high performance concrete in pipe joint internal channel, form scene system
Make ultra-high performance concrete inner protective layer 6-1, complete bonding and cover bellmouth steel loop 3 and socket steel ring 4 exposed parts, room temperature moisturizing
Maintenance at least 7 days.
5, irrigating self-compaction super performance concrete bottom pipe joint outer channel, joint outer channel side and top are filled out
Fill adhesive aggregation type ultra-high performance concrete mix, form field fabrication ultra-high performance concrete external protection 6-2, complete bonding and cover
Lid socket steel ring 4 and bellmouth steel loop 3 exposed parts, room temperature moisture-keeping maintaining at least 7 days.
Claims (6)
1. a kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe, it is characterised in that: lined prestress steel
Outside cylinder pipe of concrete body and Pipe installing is followed by the exposed parts of cephalic groove channel-section steel material, including steel cylinder (1), compressor wire
(2), bellmouth steel loop (3) and socket steel ring (4), be respectively adopted factory and make ultra-high performance concrete external protection (5) and on-the-spot
Make the inside and outside protective layer of ultra-high performance concrete (6-1,6-2) protection；Concrete lining (7) inwall of pipe, uses factory to make
Ultra-high performance concrete inner protective layer (9) protection.
A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe the most according to claim 1, its feature
Being: in the production process of pipe, the factory making 20～50mm thickness at steel cylinder (1) and compressor wire (2) outside makes super
High performance concrete external protection (5).
A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe the most according to claim 1, its feature
Being: in the production process of pipe, concrete lining (7) inwall at pipe makes the factory of 15～30mm thickness and makes very-high performance
Concrete inner protective layer (9).
A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe the most according to claim 1, its feature
It is: after Pipe installing is in place, fills field fabrication ultra-high performance concrete inner protective layer (6-1) in pipe joint internal channel,
Bonding covers bellmouth steel loop (3) and socket steel ring (4) exposed parts.
A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe the most according to claim 1, its feature
It is: after Pipe installing is in place, at the perfusion of pipe joint outer channel and filling field fabrication ultra-high performance concrete external protection
(6-2), bonding covers socket steel ring (4) and bellmouth steel loop (3) exposed parts.
A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe the most according to claim 1, its feature
It is: in factory and the inside and outside protective layer of field fabrication ultra-high performance concrete (5,9,6-1,6-2), used very-high performance mixes
The hardening capacity of solidifying soil reaches standard curing 28 days: comprcssive strength is more than or equal to 120MPa, elasticity tensile strength more than or etc.
In 6MPa, tensile strength is more than or equal to 7MPa, and ultimate tensile strength is more than or equal to 1.0 ‰.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426103A (en) * | 2018-05-10 | 2018-08-21 | 周敉 | A kind of UHPC-SS compound pipeline complex pipelines and preparation method thereof |
| CN114407189A (en) * | 2022-01-25 | 2022-04-29 | 中国电建集团山东电力管道工程有限公司 | Pressure-bearing pipeline for water delivery and distribution and preparation method thereof |
| CN114409323A (en) * | 2022-03-31 | 2022-04-29 | 中铁十八局集团第四工程有限公司 | High-adhesion repair concrete for PCCP (prestressed concrete cylinder pipe) pipe emergency repair and preparation method thereof |
| CN114525725A (en) * | 2022-01-24 | 2022-05-24 | 广西交科集团有限公司 | Large-span corrugated steel web continuous rigid frame lining concrete composite web structure |
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| CN108426103A (en) * | 2018-05-10 | 2018-08-21 | 周敉 | A kind of UHPC-SS compound pipeline complex pipelines and preparation method thereof |
| CN114525725A (en) * | 2022-01-24 | 2022-05-24 | 广西交科集团有限公司 | Large-span corrugated steel web continuous rigid frame lining concrete composite web structure |
| CN114407189A (en) * | 2022-01-25 | 2022-04-29 | 中国电建集团山东电力管道工程有限公司 | Pressure-bearing pipeline for water delivery and distribution and preparation method thereof |
| CN114409323A (en) * | 2022-03-31 | 2022-04-29 | 中铁十八局集团第四工程有限公司 | High-adhesion repair concrete for PCCP (prestressed concrete cylinder pipe) pipe emergency repair and preparation method thereof |
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Application publication date: 20161116 |