CN206018048U - The embed-type Prestressed concrete cylinder pipe of long life anti corrosion - Google Patents

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

The embed-type Prestressed concrete cylinder pipe of long life anti corrosion

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）.