CN206018048U - The embed-type Prestressed concrete cylinder pipe of long life anti corrosion - Google Patents
The embed-type Prestressed concrete cylinder pipe of long life anti corrosion Download PDFInfo
- Publication number
- CN206018048U CN206018048U CN201620903480.7U CN201620903480U CN206018048U CN 206018048 U CN206018048 U CN 206018048U CN 201620903480 U CN201620903480 U CN 201620903480U CN 206018048 U CN206018048 U CN 206018048U
- Authority
- CN
- China
- Prior art keywords
- concrete
- high performance
- ultra
- pipe
- embed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 38
- 230000007797 corrosion Effects 0.000 title claims abstract description 28
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 80
- 239000004567 concrete Substances 0.000 claims abstract description 49
- 230000004224 protection Effects 0.000 claims abstract description 33
- 239000011241 protective layer Substances 0.000 claims description 42
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 239000010410 layer Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 12
- 238000011049 filling Methods 0.000 claims description 5
- 230000010412 perfusion Effects 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000007115 recruitment Effects 0.000 claims description 2
- 230000035699 permeability Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 4
- 238000007710 freezing Methods 0.000 abstract description 3
- 239000004570 mortar (masonry) Substances 0.000 description 40
- 238000000034 method Methods 0.000 description 17
- 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
- 239000000835 fiber Substances 0.000 description 11
- 239000011083 cement mortar Substances 0.000 description 10
- 238000005336 cracking Methods 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 230000002776 aggregation Effects 0.000 description 9
- 238000004220 aggregation Methods 0.000 description 9
- 239000002002 slurry Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000002689 soil Substances 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 6
- 238000007667 floating Methods 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 5
- 238000004210 cathodic protection Methods 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 238000005056 compaction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004574 high-performance concrete Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000000518 rheometry Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- -1 zinc-aluminium rare earth Chemical class 0.000 description 3
- 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
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229920006334 epoxy coating Polymers 0.000 description 2
- 239000011210 fiber-reinforced concrete Substances 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 206010010356 Congenital anomaly Diseases 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 238000005530 etching Methods 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
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The utility model discloses a kind of embed-type Prestressed concrete cylinder pipe of long life anti corrosion, compressor wire covered and protect using the ultra-high performance concrete bonding of high deformability, bury steel not corrosion in other, and for internal layer concrete protection.The ultra-high performance concrete used by this utility model possesses excellent physical and mechanical property; including high bond strength, high deformation and high anti-crack ability, high tenacity, high-tensile; and high permeability resistant energy, high resist chemical performance and high anti-freezing melt performance superelevation durability; reliable, long-acting anti-corrosion protection can be provided for embed-type Prestressed concrete cylinder pipe; the durability and operational reliability of this kind of pipeline is increased substantially, is ensured and is realized to such desired long service live of tubing laying pipeline（75～100 years）.
Description
Technical field
The present invention relates to embed-type Prestressed concrete cylinder pipe, in particular by the very-high performance coagulation of high deformability
Soil, the long-term not corrosion of steel in protective conduit in corrosive atmosphere, and concrete inner wall is protected from corrosion in water.
Background technology
Prestressed concrete cylinder pipe（Prestressed Concrete Cylinder Pipe, abbreviation PCCP）It is a kind of
Water transferring line, originates from France, and America and Europe started development, the eighties and started to develop in China and apply the forties in last century.
PCCP is to wind compressor wire by the high-strength concrete tube core with steel cylinder, then sprays with cement mortar protective course and structure
Into；Welded together with steel bell and spigot and steel cylinder, slidingtype flexible joint is formed by the groove on bell and spigot and cushion rubber.PCCP is pressed
Structure（Position of the steel cylinder in tube core）It is divided into lined Prestressed concrete cylinder pipe（Abbreviation PCCPL）With embed-type prestressing force
Cylinder concrete pipe（Abbreviation PCCPE）.Then PCCPL winds ring outside thin steel cylinder using thin steel cylinder inner lining concrete as tube core
To compressor wire and mortar cover is made, be 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 wind ring orientation prestress steel wire and make mortar cover, be suitable for mouth
The pipeline of footpath DN1400～4000mm.This utility model is directed to embed-type Prestressed concrete cylinder pipe（PCCPE）.
PCCP is the compound tubing that steel plate, concrete, high tensile steel wire and cement mortar different materials are combined, 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-
Shock stability is good, the low feature of operation and maintenance cost, thus long distance water transfer main at home and abroad, urban water supply and industry have
Pressure water（Including general power plant, nuclear power station）, pressure inverted-siphon, sewage pressure main, submarine pipeline（Clean water or saline）, overflow
It is widely adopted in the engineerings such as flow tube.For large-scale water transmission pipeline, compared with steel pipe, ductile iron pipe, advantage is to make PCCP
Low cost is made, and anticorrosive and maintenance cost is low.
The U.S. once assessed, and the service life of PCCP was in 75～100 years.However, application is so far, the durability of PCCP and can
Property is leaned on increasingly to be under suspicion.Famous " the big race in the Africa " engineering that builds the eighties in last century, has sent out during by 2005
Raw 5 PCCP explosions；Through detection, oneself is it is found that steel wire fracture 3500, is badly in need of carrying out positive rehabilitation plan part pipeline.
This engineering present, thousands of section PCCP pipeline sections need repairing or change, and remaining pipeline needs to carry out state estimation.Last century 90
Since age, the U.S. has a plurality of PCCP pipelines that booster event occurs, and reduces people to PCCP durability and the letter of service life
The heart." PCCP manages the calamity of very high failure likelihood and failure, and reproduction PCCP is not managed now to have caused the U.S. ".In
State also there occurs that a lot of PCCP pipeline bursts events, most bob give birth to the PCCP pipelines of booster in recent years, and the time for putting into effect is only
There are 3～5 years.Additionally, the detection carried out to running pipeline finds that compressor wire " fracture of wire " is PCCP Common Diseases and hidden danger.
Compressor wire corrosion is broken to be shown to the investigation of all booster events, makes PCCP bear intrinsic pressure ability big
Amplitude reduction, is the immediate cause that booster occurs.Wire quality difference and（Or）Then compressor wire becomes rusty for mortar cover failure
Erosion, then be that steel wire is broken（Fracture of wire）Main cause.Problem has its source in, embed-type Prestressed concrete cylinder pipe standard gauge
The mortar cover crack-resisting design of model, " deflection " of check method are it is assumed that have larger difference with reality." deflection " is false
If viewpoint thinks, protective layer will be produced the microcrack that visually can not be seen by stretch higher than mortar tensile strength；And visible split
8 times for microcrack of seam deflection, now protective layer virtuality tension stress is 8 times of mortar tensile strength.Standard regulation protection
Slabbing stitches check method, using the deflection or virtual tension stress of suitable 6.4～8 times of cement mortar tensile strength, as long as interior
The deflection or tension stress that outer load is produced assumes deflection or virtual tension stress less than this, and protective layer crack is just checked
Can pass through.Such protective layer crack is checked and is performed practically no function, " PCCP standards specify, mortar cover be not allow for any can
See crack, a variety of cracks of practical situation mortar cover are inevitable ".That is, PCCP pipes mortar cover cracking and
Cannot effective protection compressor wire, be because that mortar deformation itself and anti-crack ability are not enough, and sand put up with the design of pipe
Slurry performance, so that cause PCCP（PCCPE and PCCPL pipes）The defect for having congenital durability not enough.The temperature difference big, dry and
Corrosive atmosphere, this defect be fatal, compressor wire can very fast corrosion, break and booster occur.This is also that the U.S. washes in a pan
Eliminate the basic reason of PCCP.
Content of the invention
This utility model exactly manages the root of this defect for PCCPE, there is provided reliable solution, extensive application value
Great.China is producing in a large number and is using PCCPE at present, and this heavy caliber pipe is often used for large-scale, ultra-large type water delivery engineering.
These engineerings are projects of vital and lasting importance, do not allow booster or there is potential hidden danger；Once generation problem, the loss for bringing will be
Huge.People have also realised that the mortar cover for currently using cannot ensure the durability of PCCPE and safety, need
Want relatively reliable technical scheme.
The purpose of this utility model is, is embed-type Prestressed concrete cylinder pipe（PCCPE）There is provided a kind of reliable, long
The anti-corrosion method of effect, it is characterised in that：Embed-type Prestressed concrete cylinder pipe（PCCPE）And after Pipe installing all outer
The steel of dew, including compressor wire, bellmouth steel loop and socket steel ring, are respectively adopted factory and field fabrication very-high performance coagulation
Native external protection and inner protective layer bonding covering protection；The internal layer concrete inner wall of pipe, is mixed using the very-high performance that factory makes
Solidifying soil inner protective layer protection.
Technical solutions of the utility model are：A kind of embed-type Prestressed concrete cylinder pipe of long life anti corrosion, embed-type pre-
On the outside of stress cylinder concrete pipe body and Pipe installing is followed by the exposed parts of cephalic groove channel-section steel material, including compressor wire,
Recruitment factory is coated with bellmouth steel loop and socket steel ring makes ultra-high performance concrete external protection or field fabrication very-high performance
The inside and outside protective layer of concrete；The internal layer concrete inner wall of pipe is coated with factory and makes ultra-high performance concrete inner protective layer.
Factory on the outside of the outer tube layer concrete and compressor wire makes ultra-high performance concrete external protection thickness
20～50mm.
It is 15～30mm that ultra-high performance concrete inner protective layer thickness is made in the factory of inner tube layer concrete inner wall.
Field fabrication ultra-high performance concrete inner protective layer, bellmouth steel loop and socket are made in the filling of pipe joint internal channel
On steel loop exposed parts, bonding covers field fabrication ultra-high performance concrete inner protective layer.
Irrigate in pipe joint outer channel and filling makes field fabrication ultra-high performance concrete external protection, socket steel ring
Field fabrication ultra-high performance concrete external protection is covered with bonding on 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 1.5 ‰.
Implementation is as follows：1st, ultra-high performance concrete is prepared：Adhesive aggregation type mix is suitable for roller and penetrates, sprays or smear slurry equipment
Make protective layer；The ultra-high performance concrete mix that Pipe installing is used, is divided into adhesive aggregation type and self-compacting type concrete, wherein self-compaction
Type is used for the perfusion of joint exterior bottom groove.The hardening capacity of ultra-high performance concrete（Standard curing 28 days）Reach：Anti-
Compressive Strength is more than or equal to 120MPa, elasticity tensile strength（Tension is just split）It is more than or equal to 6MPa, tensile strength（The limit is drawn
Stress）It is more than or equal to 7MPa, ultimate tensile strength is more than or equal to 1.5 ‰.2nd, in the production process of pipe, in outer concrete
Cover with the ultra-high performance concrete external protection bonding for making 20～50mm thickness on the outside of compressor wire；In interior layer concrete
Inwall makes the ultra-high performance concrete inner protective layer of 15～30mm thickness；Steam curing or room temperature moisture-keeping maintaining.3rd, pipeline peace
Fill in place after, pipe joint internal channel fill adhesive aggregation type ultra-high performance concrete, formed inner protective layer, complete bond covering hold
Mouth steel loop and socket steel ring exposed parts, room temperature moisture-keeping maintaining.4th, self-compaction super is irrigated in pipe joint outer fissure trench bottom
Energy concrete batching system, joint outer channel side and top filling adhesive aggregation type ultra-high performance concrete mix, form outer protection
Layer（6-2）, complete bonding and cover socket steel ring and bellmouth steel loop exposed parts, room temperature moisture-keeping maintaining.
Technical solutions of the utility model, are mixed with high anti-crack ability, high-tensile very-high performance using having high deformation
Solidifying soil（UHPC）, ordinary mortar is substituted as the steel wire and bell and spigot steel loop protective layer of PCCPE, can be inherently eliminated traditional sand
The defect that slurry protective layer deformation is not enough with cracking resistance；Meanwhile, using UHPC high bond strengths, high tenacity, high impact resistance,
High permeability resistant energy and good corrosion resistance, can avoid mortar cover hollowing, the problems such as easy damaged and corrosion resistance are not enough.
UHPC protective layers can provide protection reliably and with long-term for compressor wire and bell and spigot steel loop, significantly lift the resistance to of PCCPE
Long property and service life.Additionally, PCCPE has been also used for pressure sewage or corrosive liquid conveyance conduit, interior layer concrete can be subject to
Chemical attack and reduce service life.For such problem, this utility model makes UHPC protective layers protection PCCPE in inside pipe wall
Interior layer concrete.
Ultra-high performance concrete（Ultra-High Performance Concrete, abbreviation UHPC）, because need to typically 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, abbreviation UHPFRC）.UHPC belongs to modern advanced material, innovation
Cement-based material（Concrete or mortar）With fiber, steel（Reinforcing bar or high strength wire）Composite mode, significantly carry
The high intensity utilization ratio of fiber and reinforcing bar in concrete, makes all round properties of cement-based material there occurs that great-leap-forward enters
Step possesses strong superelevation, high tenacity and superelevation durability.
" the superelevation mechanical property " of UHPC is mainly reflected in superelevation tensile strength（Uniaxial tension and bending and tensile strength）With
High tenacity, this are realized by short steel fibre is added.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 the ranks of toughness, high-toughness material（Energy to failure is more than 1,000J/m2Draw
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
Elastic stage is experienced in " strain hardening " behavior, i.e. single shaft tension, many microcracks occurs, and fiber drawing-resistant function starts；Should with post-tensioning
Power rises, and enters the stiff strain hardening stage（" surrender " of similar steel）；Reach maximum tension stress after cracking（Tension is strong
Degree）, there are indivedual cracks in local expansion, afterwards tension decline, enter softening stress-displacement stage.Steel fibre intensity obtains effective profit
With, UHPC so as to obtaining very high cracking resistance and impact resistance.
Another performance of UHPC most captivations is potential superelevation durability.Theoretically and according to test so far
Result of study, substantially can determine：UHPC does not have freeze-thaw cycle, alkali-aggregate reaction（AAR）And delayed ettringite formation
（DEF）The problem of destruction；In uncracked condition, the anti-carbonation of UHPC, resisting chloride ion penetration intrusion, resisting erosion of sulfate, anti-chemistry are rotten
Erosion, the endurance quality index such as wear-resisting, with traditional high-strength high-performance concrete（HSC/HPC）Compare, have carrying for the order of magnitude or multiple
High.UHPC has extraordinary microcrack self-healing ability.As water-cement ratio is very low, UHPC mixes and stirs the water yield and is only capable of supplying part of cement
Aquation, the inside of most cement granules are in without hydrated state.Therefore, water or steam enter the crack of UHPC, expose
Aquation " will be continued " in the unhydrated part of the cement granules of fracture faces；The hydrated product volume for combining outside moisture is more than
Somehow volume, additional volume can cram crack to cement.Test and engineering verification show that the crack self-healing of UHPC can not only
Enough closing microcrack reduces permeability and keeps good durability, while also play the effect of " cementing " crack, extensive to a certain extent
The mechanical property that multiple concrete reduces because of crack.
The ultra-high performance concrete used by this utility model（UHPC）, possess high deformation and high anti-crack ability, high tensile
Intensity, high tenacity, high impact resistance, high permeability resistant, high-durability and crack self-healing performance；With concrete and the boundary of steel
Face adhesion strength is also very high, is the anti-corrosion protection material of preferable PCCPE pipes；The protective layer made of which, working life
More than a century, it is long-effective corrosion etching method.
Classify from aggregate size, UHPC is also mortar or extraordinary mortar.UHPC can be prepared rheology is mixed and stirred with common height
Strength mortar is similar to, and directly penetrates, sprays or smears slurry using existing weaponry and equipment roller and make protective layer；Protected using the excellent hardening capacities of UHPC
The steel such as compressor wire and bell and spigot steel loop inside shield PCCPE, and interior layer concrete, are a kind of easily enforcement, reliability, length
The anti-corrosion method of effect, can significantly lift the durability and working life of PCCPE.
Prestressed concrete cylinder pipe in the implementation of prior art（PCCPE）Generation premature failure or durability are not
Good, main cause is the compressor wire of PCCPE and steel cylinder corrosion；Also small part PCCPE initial failure is because producing matter
Amount defect, using unqualified, improper grade or the steel of kind, excessively using cathodic protection（Excessive extra current, Ke Nengyin
Liberation of hydrogen causes metal toughness or ductility to reduce, i.e., " hydrogen embrittlement "）.Now, standard criterion, such as GB/T 19685-2005《Prestress steel
Cylinder pipe of concrete》, clearly require to the PCCP qualities of production, using steel and mortar cover（Cracking resistance requires to put up with
The performance that mortar can reach）； GB 28725-2012《The cathodic protection in buried Prestressed concrete cylinder pipe road》Then advise
Model, guidance and the etch-proof cathodic protection levels of raising PCCPE.But, the mortar cover of PCCPE remains its durability
Weak link.Mortar cover itself cracking is inevitable, and in transporting and hoisting process easy damaged, resisting chloride ion penetration is invaded and anti-ization
Learn corrosive power not enough.The temperature difference big, dry, drying and watering cycle and corrosive atmosphere（Soil or subsoil water are compared with generally existing sulphuric acid
Salt, villaumite or sour corrosion）, and under external and internal pressure effect, mortar is possible to serious cracking and very fast deterioration, loses in advance should
The protective effect of power steel wire, bell and spigot steel loop etc..Mortar cover fails, and the load of cathodic protection significantly will increase, or even
Uncontrollable compressor wire, steel loop corrosion spread.
Requirement can be met for PCCPE mortar cover cracking resistances, corrosion resistance, and internal layer agent on crack resistance of concrete chemistry is rotten
Erosion scarce capacity, also has some patents to propose Improving Measurements, wherein has：
·CN201220309614.4（There is the embed-type prestress steel cylinder concrete of fibre crack-resistance mortar cover on surface
Pipe）：The utility model method is relied on.
·CN201210162950.5（Galvanizing is combined embed-type prestress steel cylinder concrete with epoxide coal bituminous anti-corrosion
Pipe）、CN201210220591.4（The embed-type Prestressed concrete cylinder pipe of long-life multi-layer anticorrosion process）、
CN201310189741.4（A kind of inwall has the embed-type Prestressed concrete cylinder pipe of epoxy protective layer）、
CN201510603627.0（The embed-type Prestressed concrete cylinder pipe of long-life full anti-corrosion direct drinking）、
CN201510604025.7（The embed-type Prestressed concrete cylinder pipe of full anti-corrosion direct drinking）：These inventive methods, anti-corrosion
Erosion measure includes steel cylinder and wire galvanization, inner liner stainless steel steel cylinder or PVC, inwall coating epoxy coating, pipe outer wall coating epoxy
Bituminous coating, bellmouth steel loop and socket steel ring coating corrosion-inhibiting coating or zinc-aluminium rare earth coating, mortar cover admixture polypropylene are fine
Dimension improves cracking resistance, etc., and compound use these measures.
·CN201310187286.4（PCCP power plant cooling waters cylinder concrete pipe and production method with anticorrosive coat）：Should
Inventive method while the last operation of whitewashing together that traditional PCCP pipelines are produced, using scraping device by whitewashing after water
Cement mortar surface strikes off, while cement mortar is applied and strikes off rear crude pipe surface by the device of the underflow of cementing of rear follow-up,
The pressurization floating device cement mortar that applies pipe surface that follows up afterwards again afterwards after pipeline is parched completely, is managed while floating
Road surface using machinery method coating epoxy resin and winding glass fibre, while scraped using mechanical means floating whole, to be coated
Production tube is after the epoxy resin fiberglass protective layer solidification that covers.
·CN201310187303.4（Prestressed concrete cylinder pipe and production method with epoxy mortar protective layer）：Should
Inventive method while the last operation of whitewashing together that traditional PCCP pipelines are produced, using scraping device by whitewashing after water
Cement mortar surface strikes off, while the crude pipeline table after epoxy resin is applied and struck off of the device of the coating epoxy resin of rear follow-up
Face, then follow-up epoxy mortar coating unit coats epoxy mortar with epoxy resin surface and pressurizes simultaneously floating afterwards.
·CN201310187328.4（Novel seepage PCCP Prestressed concrete cylinder pipes and production method）：The invented party
Method while the last operation of whitewashing together that traditional PCCP pipelines are produced, using scraping device by whitewashing after cement mortar
Surface strikes off, while cement mortar is applied and strikes off rear crude pipe surface, then heel by the device of the underflow of cementing of rear follow-up
The cement mortar that pipe surface is applied by the pressurization floating device for entering is while floating.
In said method, polypropylene fibre can only improve mortar hardening stage anti-crack ability, that is, prevent or reduce mortar modeling
Property contraction fissure；Polypropylene fibre can not improve the cracking resistance of hardened mortar, because its elastic modelling quantity is too low, it is impossible to constrain
The crack of hardened mortar；Additionally, the method does not improve the impervious and resistance to corrosion of mortar.Mortar cover surface-coated
Mortar can be completely cut off by epoxy resin fiberglass anticorrosive coat, bituminous epoxy coating etc. with corrosive environment；Steel cylinder and wire galvanization,
Bell and spigot steel loop coating anticorrosive paint etc., can delay the generation of corrosion.Can these anti-corrosion methods extensively be applied, depending on into
Originally with antiseptic effect or cost performance.
This utility model then provides a kind of brand-new technical scheme, substitutes traditional mortar, the UHPC for being used with UHPC
Possess excellent mechanical property and durability, compressor wire inside PCCPE, bellmouth steel loop and socket can be protected stably in a long term
In steel loop not corrosion, and protection, layer concrete is from chemical attack.The easy implementation of the technical scheme and reliable sexual clorminance body
Now：
1st, can preparing UHPC, to mix and stir rheology similar with ordinary mortar, is easy in factory directly using existing weaponry and equipment roller
Penetrate, spray or smear slurry and make interior external protection, existing production technology need not be changed；Meanwhile, can be prepared in situ in Pipe installing
Self-compaction and adhesive aggregation type UHPC mix, are easy to perfusion and fill pipe joint groove, bonding cover and protection bellmouth steel loop and
Socket steel ring exposed parts.
2nd, UHPC mixs have high cohesion, with good adherence of concrete, steel wire and steel loop surface, can improve plant protection
Layer make efficiency, and improve the efficiency that Pipe installing field joint trench fill makes protective layer.
3rd, hardening UHPC and the interface binding intensity between concrete, steel wire and steel loop, significantly larger than normal concrete, sand
The interface binding intensity between concrete, steel that slurry can reach, it is easy to avoid the occurrence of the defects such as hollowing.
4th, UHPC containing micro steel fiber used in the present invention, possess high deformation and high anti-crack ability, high-tensile and
High impact-resistance, ensure that PCCPE protective layers in various mechanics loads（Pipeline transportation lifting collision, external and internal pressure effect）
And environmental load（Drying and watering cycle, temperature change）Globality under effect.
5th, there is UHPC high solidity, high permeability resistant, good corrosion resistance and high anti-freezing to melt performance, and UHPC is current in itself
The best material of durability in all engineering materials（In natural environment more than working life a century, Japanese specification thinks that UHPC is tied
Structure working life 100 years）, therefore guarantor reliably and with long-term can be provided for compressor wire and bell and spigot steel loop and interior layer concrete
Shield.
6th, UHPC protective layer technical schemes are adopted, is corroded in the face of salt-soda soil or ground water chemistry, it is no longer necessary to do in pipe shaft
Corrosion-inhibiting coating, advantage of lower cost.UHPC protective layers are compatible with cathode protection technology, and cathodic protection can be used as standby measure.
7th, UHPC protective layers good combination property, reliability are high, can be PCCPE compressor wires and bell and spigot steel loop and interior
Layer concrete provides long life anti corrosion protection, significantly reduces pipeline performance maintenance and repair expense, the century-old engineering of achievement.
8th, to solve PCCPE protective layer crack-resisting designs, the hypothesis of check method and mortar material performance inconsistent for the present invention
A difficult problem, eliminate from root PCCPE design durability defect.
The utility model has the advantage of：It is similar with ordinary mortar that prepared UHPC mixes and stirs rheology, can be used directly
Existing weaponry and equipment roller is penetrated, sprays or is smeared slurry and makes protective layer；Used ultra-high performance concrete（UHPC）Possesses excellent physical force
Performance is learned, including high deformation and high anti-crack ability, high-tensile, high bond strength, high tenacity, high impact-resistance, and
High permeability resistant energy, high resist chemical performance and high anti-freezing melt performance superelevation durability, are that embed-type pre-stress steel cylinder is mixed
Solidifying soil pipe（PCCPE）Reliable, long-acting anti-corrosion protection is provided, increases substantially the durability and reliability of this kind of pipeline, protect
Desired long service live realized by the pipeline that barrier is laid using the tubing（75～100 years）.
Description of the drawings
Fig. 1 is the embed-type Prestressed concrete cylinder pipe structural representation of this utility model.
1- steel cylinders；2- compressor wires；3- bellmouth steel loops；4- socket steel rings；5- factories are made outside ultra-high performance concrete
Protective layer；6-1- field fabrication ultra-high performance concrete inner protective layers；6-2- field fabrication ultra-high performance concrete external protections；
Layer concrete in 7-；8- outer concretes；9- rubber rings；The pre-buried anchorages of 10-；11- factories make in ultra-high performance concrete and protect
Sheath
Specific embodiment
Embed-type Prestressed concrete cylinder pipe（PCCPE）Compressor wire, part bellmouth steel loop and part socket steel ring
Factory make ultra-high performance concrete external protection 5 and the factory of interior layer concrete makes ultra-high performance concrete inner protective layer
11, complete in factory.After Pipe installing is in place, the very-high performance of joint bellmouth steel loop and socket steel ring exposed parts is mixed
Solidifying soil inner protective layer 6-1 and external protection 6-2, completes in Pipe installing field fabrication.Comprise the following steps that：
1st, adhesive aggregation type ultra-high performance concrete is prepared in factory：The mix slump is newly mixed for 30 ~ 100mm, is suitable for machinery
Roller is penetrated, sprays or is smeared slurry and makes protective layer.The hardening capacity of ultra-high performance concrete（Standard curing 28 days）Reach：Pressure resistance
Degree is more than or equal to 120MPa（100mm cube of test specimen）, elasticity tensile strength is more than or equal to 6MPa（30mm thick plates test specimens）,
Tensile strength is more than or equal to 7MPa, and ultimate tensile strength is more than or equal to 1.5 ‰.
2nd, in the production process of PCCPE, 20～50mm thickness is made on the outside of outer concrete 8 and compressor wire 2
Factory makes ultra-high performance concrete external protection 5；The factory that 15～30mm thickness is made in internal layer concrete seven inwall makes super
High performance concrete inner protective layer 11；Steam curing（90 DEG C of constant temperature 48 hours, heating-cooling speed are less than 15 DEG C/h）Or room temperature
Moisture-keeping maintaining at least 7 days.
3rd, at Pipe installing scene, self-compacting type concrete and adhesive aggregation type ultra-high performance concrete are prepared, wherein self-compacting type concrete is used for
The perfusion of pipe joint outer fissure trench bottom.The hardening capacity of ultra-high performance concrete is required ibid.
4th, after Pipe installing is in place, adhesive aggregation type ultra-high performance concrete is filled in pipe joint internal channel, form interior protection
Layer 6-1, completes bonding and covers bellmouth steel loop 3 and 4 exposed parts of socket steel ring, room temperature moisture-keeping maintaining at least 7 days.
5th, self-compaction super performance concrete is irrigated in pipe joint outer fissure trench bottom, joint outer channel side and top are filled out
Adhesive aggregation type ultra-high performance concrete mix is filled, field fabrication ultra-high performance concrete external protection 6-2 is formed, is completed bonding and cover
3 exposed parts of lid socket steel ring 4 and bellmouth steel loop, room temperature moisture-keeping maintaining at least 7 days.
Claims (5)
1. the embed-type Prestressed concrete cylinder pipe of a kind of long life anti corrosion, it is characterised in that：Embed-type pre-stress steel cylinder coagulation
On the outside of native pipe body and Pipe installing is followed by the exposed parts of cephalic groove channel-section steel material, including compressor wire（2）, bellmouth steel loop
（3）And socket steel ring（4）On be coated with recruitment factory make ultra-high performance concrete external protection（5）Or field fabrication very-high performance
The inside and outside protective layer of concrete（6-1、6-2）；The interior layer concrete of pipe（7）Inwall is coated with factory and makes ultra-high performance concrete
Inner protective layer（11）.
2. the embed-type Prestressed concrete cylinder pipe of long life anti corrosion according to claim 1, it is characterised in that：Outer in pipe
Layer concrete（8）And compressor wire（2）The factory in outside makes ultra-high performance concrete external protection（5）Thickness be 20～
50mm.
3. the embed-type Prestressed concrete cylinder pipe of long life anti corrosion according to claim 1, it is characterised in that：In pipe
Layer concrete（7）The factory of inwall makes ultra-high performance concrete inner protective layer（11）Thickness is 15～30mm.
4. the embed-type Prestressed concrete cylinder pipe of long life anti corrosion according to claim 1, it is characterised in that：In pipeline
The filling of joint internal channel makes field fabrication ultra-high performance concrete inner protective layer（6-1）, bellmouth steel loop（3）And socket steel ring
（4）On exposed parts, bonding covers field fabrication ultra-high performance concrete inner protective layer（6-1）.
5. the embed-type Prestressed concrete cylinder pipe of long life anti corrosion according to claim 1, it is characterised in that：In pipeline
The perfusion of joint outer channel and filling make field fabrication ultra-high performance concrete external protection（6-2）, socket steel ring（4）And bellmouth
Steel loop（3）On exposed parts, bonding covers field fabrication ultra-high performance concrete external protection（6-2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620903480.7U CN206018048U (en) | 2016-08-19 | 2016-08-19 | The embed-type Prestressed concrete cylinder pipe of long life anti corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620903480.7U CN206018048U (en) | 2016-08-19 | 2016-08-19 | The embed-type Prestressed concrete cylinder pipe of long life anti corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206018048U true CN206018048U (en) | 2017-03-15 |
Family
ID=58249423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620903480.7U Expired - Fee Related CN206018048U (en) | 2016-08-19 | 2016-08-19 | The embed-type Prestressed concrete cylinder pipe of long life anti corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206018048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483171A (en) * | 2021-07-02 | 2021-10-08 | 中山大学 | Novel prestressed steel cylinder concrete pipe |
-
2016
- 2016-08-19 CN CN201620903480.7U patent/CN206018048U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483171A (en) * | 2021-07-02 | 2021-10-08 | 中山大学 | Novel prestressed steel cylinder concrete pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101698589A (en) | Novel patching material | |
| CN106122616A (en) | A kind of long-effective corrosion etching method of lined Prestressed concrete cylinder pipe | |
| CN110952996A (en) | Method and material for reinforcing power tunnel with fiber mesh reinforced polymer mortar | |
| CN203307801U (en) | Composite material sleeve | |
| Asmara | Concrete Reinforcement Degradation and Rehabilitation: Damages, Corrosion and Prevention | |
| CN107599273A (en) | Enhancing by polymer Prestressed concrete cylinder pipe road moulding process | |
| CN102747751B (en) | Underground waterproof system and construction method thereof | |
| CN114407189B (en) | Pressure-bearing pipeline for water delivery and distribution and preparation method thereof | |
| CN112982396A (en) | Tensile fiber anchor rod body and anchor rod | |
| CN204254073U (en) | A kind of pre-stress steel cylinder RPC tubing | |
| CN206018048U (en) | The embed-type Prestressed concrete cylinder pipe of long life anti corrosion | |
| CN106287008A (en) | A kind of long-effective corrosion etching method of embed-type Prestressed concrete cylinder pipe | |
| WO2016064326A1 (en) | Concrete mixture and its applications | |
| Fan et al. | Retrofitting of damaged reinforced concrete pipe with CAC-GGBFS blended strain hardening cementitious composite (SHCC) | |
| CN113026837A (en) | Restoration, reinforcement and anticorrosion construction method for port RC pile foundation in alpine region | |
| CN206036428U (en) | Long -effective anti -corrosion loses inside lining formula prestressing force steel cylinder concrete pipe | |
| Sun et al. | A new controlled drainage system for submarine tunnels using double-adhesive waterproof membrane | |
| Lea et al. | THE DETERIORATION OF CONCRETE IN STRUCTURES. | |
| CN208295326U (en) | Full corrosion-proof lining formula Prestressed concrete cylinder pipe | |
| CN206754617U (en) | The prefabricated natural gas line of concrete outer cladding | |
| CN215862114U (en) | Sewage pipeline with waterproof structure inside | |
| CN106082855A (en) | A kind of high intensity high-durability modified concrete structure repair material | |
| CN113105188B (en) | A method of reinforcing poles based on fiber mesh reinforced UHPC | |
| CN206268634U (en) | A kind of power station pressure pipeline water-tight corrosion-proof structure | |
| Deng et al. | Construction materials and structures of digesters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170315 Termination date: 20190819 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |