CN106352165A - Prestressed carbon fiber reinforced structure design of prestressed concrete cylinder pipe (PCCP) - Google Patents
Prestressed carbon fiber reinforced structure design of prestressed concrete cylinder pipe (PCCP) Download PDFInfo
- Publication number
- CN106352165A CN106352165A CN201610883948.5A CN201610883948A CN106352165A CN 106352165 A CN106352165 A CN 106352165A CN 201610883948 A CN201610883948 A CN 201610883948A CN 106352165 A CN106352165 A CN 106352165A
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- Prior art keywords
- pccp
- carbon fiber
- structure design
- pccp pipe
- reinforcing structure
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a prestressed carbon fiber reinforced structure design of a prestressed concrete cylinder pipe (PCCP). A prestressed carbon fiber reinforced structure of the PCCP sequentially comprises a flexible impermeable coating, a carbon fiber cloth layer, an elastic and rigid compound cushion layer and the PCCP from inside to outside. According to the prestressed carbon fiber reinforced structure of the PCCP, by arrangement of an elastic cushion layer, on the premise of guaranteeing that the PCCP is not stressed obviously, the deformation of the carbon fiber cloth layer is increased, so that pulling stress capable of being born by the carbon fiber cloth layer, namely prestressed carbon fibers, is increased, the stress dispersed to the PCCP is reduced, fracture of PCCP concrete or breakage of a prestressed wire is avoided, the high strength advantages of the carbon fiber material is brought into full play, and the PCCP reinforcing effect of carbon fibers is increased to the largest extent.
Description
Technical field
The present invention relates to hydraulic engineering field is and in particular to a kind of pccp pipe pre-stressed carbon fiber reinforcing structure sets
Meter.
Background technology
Prestressed concrete cylinder pipe (prestressed concrete cylinder pipe, write a Chinese character in simplified form pccp pipe) is
Refer to be wound around ring orientation prestress steel wire, then the cement mortar guarantor that spray thereon is fine and close on the high-strength concrete tube core with steel cylinder
Sheath and the water-supply-pipe made.It is the composite pipe being made up of sheet metal, high tensile steel wire and concrete, has comprehensively played steel
Tension, the easily resistance to compression of sealing and concrete, decay resistance, there is high leakproofness, high intensity and high impervious characteristic, extensively
It is applied to long interval water conveying tunnel, pressure inverted-siphon, urban water supply engineering, industry pressure water conveyer pipeline, power plant cycle Hydraulic Projects
Sewer pipe, pressure blowdown main etc..Compared with conventional tubing, pccp pipe has applied widely, economic life length, shock resistance
Can be good, easy for installation, substantially water-tight the advantages of.In China's water diversion project, the engineering using pccp pipe gets more and more at present.
But due to the reason such as design, Construction defect, operational management be improper, occur multiple engineerings booster phenomenon to occur, sternly at present
Threaten the safe operation of aqueduct again.Most of booster is due to being wound around ring orientation prestress steel wire on high-strength concrete tube core
Caused by fracture of wire occurs, in order to prevent trouble before it happens, the pccp pipe being tested with fracture of wire is needed to reinforce.
Pccp pipe reinforce can using displacement, increase outside section, steel bonding method, liner steel drum, paste outside carbon fiber and
The methods such as inner side sticking carbon fiber.These methods differ from one another, and have both advantages and disadvantages.Inner side sticking carbon fiber reinforces pccp Manifold technology
Carbon fibre material is pasted on by concrete surface inside pccp pipe by resinae cementing material, is reached by both collective effects
To reinforcement and strengthening, a kind of reinforcement technique of improving structure tension performance.Compared with other reinforcement techniques, this technology need not be large-scale
Construction equipment, easy construction, efficiently, quality easily ensures.Carbon fibre material typically has good corrosion resistance and durability, piece
Material is lighter and thin, does not substantially increase original structure deadweight and the cross-section of river not reducing pccp pipe.But substantial amounts of experimentation and work
Journey practice have shown that, current reinforce pccp Manifold technology from inner side sticking carbon fiber and there are some inherent shortcomings, due to carbon fiber bullet
Property modulus much lower relative to its intensity, need larger deformation during Developed fiber strength it is difficult to the deformation of suppression pccp tubular construction with split
The development of seam, leads to carbon cloth reinforced pccp pipe DeGrain.As carbon fiber, in relatively low stress level, pccp manages
Will crack or the fracture of outside compressor wire in concrete, so that the high intensity advantage of carbon fibre material can not be had
Effect plays.These defects reduce the effect that carbon fiber is reinforced to pccp pipe to a great extent, increased reinforcing
Cost.
Content of the invention
For improving the deficiencies in the prior art, a kind of reinforcing structure design is proposed, can under water under high pressure effect maximum journey
Degree reinforces pccp pipe using the advantage of carbon fiber high-strength degree, the invention provides a kind of pre-stressed carbon fiber reinforcing pccp pipe
Structure design, located at pccp inside pipe wall, described pccp pipe pre-stressed carbon fiber reinforcing structure design includes:
Flexible barrier coating, located at pccp pipe inner side, is used for preventing from managing interior water penetration in carbon cloth and bed course；
Carbon fibre cloth layer, located between flexible barrier coating and bed course, that shares under internal water pressure effect that pccp pipe bears draws
Stress；
Bed course, including spaced elastic insert and rigid mat, wherein,
Elastic insert between the concrete layer and carbon fibre cloth layer of pccp inside pipe wall, for increasing the deformation of carbon fibre cloth layer
Amount；
Rigid mat, between the concrete layer and carbon fibre cloth layer of pccp inside pipe wall, with elastic insert in same layer, is used for
Strengthen the connection of carbon cloth and pccp pipe；
Wherein, between 0-30cm, thickness is between 3-6mm for the width of aforementioned rigid mat.
Wherein, between 20-50cm, thickness is between 3-6mm for the width of aforementioned flexible bed course.
Wherein, the thickness of aforementioned flexible bed course is equal to rigid mat.
Wherein, the material of aforementioned rigid mat is epoxy putty or epoxy resin mortar.
Wherein, the material of aforementioned flexible bed course is compressible low-elasticity-modulus polyurathamc, the described low-elasticity-modulus poly- ammonia of foaming
The decrement of ester is more than 40%.
Wherein, aforementioned carbon fibre cloth layer is set to 1-3 layer, by carbon fiber binding agent paste elastic insert after hardening and
On rigid mat.
Wherein, the material of aforementioned carbon fiber binding agent is epoxy resin.
Wherein, the thickness of foregoing soft protective coating is between 1 ~ 2mm.
Wherein, the material of foregoing soft protective coating is one-component polyureas.
The pccp pipe pre-stressed carbon fiber reinforcing structure design that the present invention provides, by arranging elastic insert, is protecting
On the basis of card pccp pipe does not substantially deform, increased the deflection of carbon fibre cloth layer, thus increased carbon fibre cloth layer institute
The tension that can bear, and then reduce the stress being distributed to pccp pipe, effectively prevent pccp pipe concrete occur crack or
Compressor wire rupture, make carbon fibre material high intensity advantage be effectively played, farthest increased carbon fiber pair
The reinforcing effect of pccp pipe.
Brief description
Fig. 1: pccp pipe pre-stressed carbon fiber reinforcing structure design schematic diagram according to embodiments of the present invention.
Specific embodiment
Further understand to have to the pccp pipe pre-stressed carbon fiber reinforcing structure design of the present invention, below
Cooperation accompanying drawing describes the structure design of the present invention and its effect of generation in detail.
Fig. 1 is the pccp pipe pre-stressed carbon fiber reinforcing structure design schematic diagram of one embodiment of the invention, such as Fig. 1
Shown, the invention provides a kind of pccp pipe pre-stressed carbon fiber reinforcing structure, it is arranged in pccp pipe, from inboard to outer
Side includes successively: flexible protective coating 1, carbon fibre cloth layer 2 and bed course, and described bed course includes elastic insert 31 and rigid mat
32.
When being embodied as, described flexible protective coating 1 can also be omitted selectivity, and makes only to include in the pccp pipe of preparation
From inboard to the carbon fibre cloth layer 2 in outside, elastic insert 31+ rigid mat 32 and steel cylinder concrete layer 4, but in flexible protective
In the presence of coating 1, carbon fiber can be prevented effectively from while playing its high-strength characteristic, because carbon fibre cloth layer 2 is stretched
Long rate is larger, deform the situation that microcrack in surface that is larger and may leading to, makees in water under high pressure such that it is able to effectively solving
Problem with the internal pre-stressed carbon fiber antiseepage of lower pccp pipe.
In the present invention, by arranging bed course between carbon fibre cloth layer 2 and steel cylinder concrete layer 4, bed course includes cushion
Layer 31 and rigid mat 32, on the basis of substantially can not deforming ensureing pccp pipe, increased the deformation of carbon fibre cloth layer 2
Amount, thus increased the tension that carbon fibre cloth layer 2 can bear, and then reduces the stress being distributed to steel cylinder concrete layer 4,
Avoid pccp pipe concrete simultaneously and crack or compressor wire fracture occur, so that the high intensity advantage of carbon fibre material is had
Effect plays, and farthest increased the consolidation effect to pccp pipe for the carbon fiber.Its particular technique principle is to make in internal water pressure
With under, elastic insert 31 compressive deformation, lead to carbon fibre cloth layer 2 tension on its surface, that is, be equivalent to and apply to carbon fibre cloth layer 2
Pre-tensile stress, carbon fibre cloth layer 2, because being in tension state, there has been certain deformation, can first undertake water in a part
Pressure, then bear internal water pressure together with the steel cylinder concrete layer 4 of periphery, therefore can give full play to carbon fiber high-tensile
Feature.
When being embodied as, as shown in figure 1, elastic insert 31 and rigid mat 32 interval setting, wherein, elastic insert 31
Decrement is far longer than rigid mat 32 so that elastic insert 31 that the carbon fibre cloth layer 2 on its surface can be driven to produce is larger
Deformation so that carbon fibre cloth layer 2 bears larger tension, and what the carbon fibre cloth layer 2 on rigid mat 32 surface produced
Deformation is less, therefore in real process, can be adjusted by adjusting elastic insert 31 and the thickness of rigid mat 32 and width
The prestretching degree of whole carbon fibre cloth layer 2.
The width of described elastic insert 32 is situated between 3-6mm, the width of described rigid mat 31 between 20-50cm, thickness
In 0-30cm, thickness is identical with the thickness of elastic insert.
Certainly, it is also possible to omit rigid mat 32 in the case of ensureing elastic insert 31 and carbon fiber strong bond
Setting, and whole bed course is set to elastic insert 31.
When being embodied as, the material of described rigid mat 32 can be set to epoxy putty or epoxy resin mortar；Described elastic insert
31 material can be set to compressible low-elasticity-modulus polyurathamc, it is of course also possible to be set to other materials, as long as can be effectively increased
The deflection of carbon fibre cloth layer 2, simultaneously with pccp pipe strong bond.
In the present invention, described carbon fibre cloth layer 2 is preferably set to 1-3 layer, is pasted by carbon fiber binding agent (not shown)
On bed course after solidification.
In the present invention, the material of described carbon fiber binding agent is preferably epoxy resin.
In the present invention, between 1-2mm, material is preferably one-component polyureas to the thickness of described flexible protective coating 1.
The pccp pipe pre-stressed carbon fiber reinforcing structure that the present invention provides, mainly operation is formed as follows:
(1) size according to pccp pipe diameter, the steel cylinder concrete layer 4 inner surface brushing rigid mat 32 in pccp pipe, will
It is divided into some areas inside pccp pipe；
(2) between each rigid mat 32 brushing stack pile elastic insert 31；
(3) after elastic insert 31 solidification, in its external coating carbon fiber binding agent, prestressed carbon cloth, shape are pasted in layering
Become multi-storey up-down and translation layer 2；
(4) after the solidification of carbon fiber binding agent, in carbon fibre cloth layer 2 external coating flexible protective layer 1, wherein, flexible protective layer 1
Thickness is between 1.5-2mm.
So, just it is made for the pccp pipe including rigid mat 32 and elastic insert 31, certainly, needing to omit rigid pad
It is also possible to omit step (1) in the case of layer 32, and directly in the steel cylinder concrete layer 4 inner surface brushing cushion of pccp pipe
Layer 31.
To sum up, the pccp pre-stressed carbon fiber reinforcing structure that the present invention provides, has the advantage that
(1) pass through to arrange elastic insert, on the basis of ensureing that pccp pipe does not substantially deform, increased the change of carbon fibre cloth layer
Shape amount, thus increased the stress that carbon fibre cloth layer can bear, and then reduces the stress being distributed to steel cylinder concrete layer, with
When avoid pccp pipe concrete occur crack or compressor wire fracture, so that the high intensity advantage of carbon fibre material is obtained effectively
Play, farthest increased the consolidation effect to pccp pipe for the carbon fiber.Setting rigid mat is to increase carbon fiber layer
Globality with pccp pipe.
(2) pass through interval setting rigid mat and elastic insert, the prestretching of carbon fibre cloth layer according to actual needs, can be adjusted
Degree, so that present invention can apply to multiple occasion.
(3) pass through to arrange flexible protective coating, carbon fiber can be prevented effectively from while playing its high-strength characteristic, due to
Carbon fibre cloth layer percentage elongation is larger, deform the situation that microcrack in surface that is larger and may leading to, solves such that it is able to effective
Certainly under water under high pressure effect pccp pipe pre-stressed carbon fiber antiseepage problem.
Although the present invention is illustrated using above-mentioned preferred embodiment, so it is not limited to the protection model of the present invention
Enclose, within without departing from the spirit and scope of the present invention, above-described embodiment relatively carries out various changes to any those skilled in the art
Dynamic and modification still belongs to the scope that the present invention is protected, and therefore protection scope of the present invention is by being defined that claims are defined.
Claims (9)
1. a kind of pccp pipe pre-stressed carbon fiber reinforcing structure design, located at pccp inside pipe wall it is characterised in that described
Pccp pipe pre-stressed carbon fiber reinforcing structure design includes:
Flexible barrier coating, located at pccp pipe inner side, is used for preventing from managing interior water penetration in carbon cloth and bed course；
Carbon fibre cloth layer, located between flexible barrier coating and bed course, that shares under internal water pressure effect that pccp pipe bears draws
Stress；
Bed course, including spaced elastic insert and rigid mat, wherein,
Elastic insert between the concrete layer and carbon fibre cloth layer of pccp inside pipe wall, for increasing the deformation of carbon fibre cloth layer
Amount；
Rigid mat, between the concrete layer and carbon fibre cloth layer of pccp inside pipe wall, with elastic insert in same layer, is used for
Strengthen the connection of carbon cloth and pccp pipe.
2. pccp pipe pre-stressed carbon fiber reinforcing structure design as claimed in claim 1 is it is characterised in that described elasticity
, between 20-50cm, thickness is between 3-6mm for the width of bed course.
3. pccp pipe pre-stressed carbon fiber reinforcing structure design as claimed in claim 1 is it is characterised in that described rigidity
, between 0-30cm, thickness is between 3-6mm for the width of bed course.
4. pccp pipe pre-stressed carbon fiber reinforcing structure design as claimed in claim 1 is it is characterised in that described elasticity
Cushion thickness is equal to the thickness of rigid mat.
5. the pccp pipe pre-stressed carbon fiber reinforcing structure design as any one of claim 1-4, its feature exists
In the material of described elastic insert is compressible low-elasticity-modulus polyurathamc, the decrement of described low-elasticity-modulus polyurathamc
More than 40%.
6. the pccp pipe pre-stressed carbon fiber reinforcing structure design as any one of claim 1-4, its feature exists
In the material of described rigid mat is epoxy putty or epoxy resin mortar.
7. pccp pipe pre-stressed carbon fiber reinforcing structure design as claimed in claim 1 is it is characterised in that described carbon is fine
Dimension layer of cloth is set to 1 ~ 3 layer, is pasted on elastic insert and rigid mat after hardening by carbon fiber binding agent.
8. pccp pipe pre-stressed carbon fiber reinforcing structure design as claimed in claim 7 is it is characterised in that described carbon is fine
The material of dimension binding agent is epoxy resin.
9. pccp pipe pre-stressed carbon fiber reinforcing structure design as claimed in claim 1 is it is characterised in that flexible protective
Between 1 ~ 2mm, the material of described flexible protective coating is one-component polyureas to the thickness of coating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610883948.5A CN106352165B (en) | 2016-10-10 | 2016-10-10 | A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610883948.5A CN106352165B (en) | 2016-10-10 | 2016-10-10 | A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design |
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| CN106352165A true CN106352165A (en) | 2017-01-25 |
| CN106352165B CN106352165B (en) | 2018-08-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107443812A (en) * | 2017-07-27 | 2017-12-08 | 北京中水科海利工程技术有限公司 | A kind of high elastic course and its application |
| CN111720667A (en) * | 2020-06-22 | 2020-09-29 | 中国水利水电科学研究院 | Compound carbon fiber reinforcing method for inner wall of water pipeline |
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| JP2000205487A (en) * | 1999-01-13 | 2000-07-25 | World Engineering Kk | Pipe to be buried on sea bottom, etc. |
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| CN102691851A (en) * | 2012-06-15 | 2012-09-26 | 上海久坚加固工程有限公司 | Method for reinforcing pipeline by adopting fibrous composite fabric |
| CN202660148U (en) * | 2012-06-16 | 2013-01-09 | 上海久坚加固工程有限公司 | Pipeline repaired and reinforced by fiber composite cloth |
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| CN105401955A (en) * | 2015-11-30 | 2016-03-16 | 武汉大学 | Seepage-proofing bearing structure of soft soil pressure tunnel |
| CN105650400A (en) * | 2016-03-31 | 2016-06-08 | 中国水利水电科学研究院 | Internal strengthening and reinforcing method and strengthening combined structure for PCCP (prestressed concrete cylinder pipes) with broken wires |
| CN206234492U (en) * | 2016-10-10 | 2017-06-09 | 北京中水科海利工程技术有限公司 | A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design |
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2016
- 2016-10-10 CN CN201610883948.5A patent/CN106352165B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000205487A (en) * | 1999-01-13 | 2000-07-25 | World Engineering Kk | Pipe to be buried on sea bottom, etc. |
| CN201183949Y (en) * | 2008-04-12 | 2009-01-21 | 中交第三航务工程局有限公司江苏分公司 | Prestress large diameter assembled tube pile |
| CN102691851A (en) * | 2012-06-15 | 2012-09-26 | 上海久坚加固工程有限公司 | Method for reinforcing pipeline by adopting fibrous composite fabric |
| CN202660148U (en) * | 2012-06-16 | 2013-01-09 | 上海久坚加固工程有限公司 | Pipeline repaired and reinforced by fiber composite cloth |
| CN202826546U (en) * | 2012-10-24 | 2013-03-27 | 南京林业大学 | Composite pipe concrete combination structure |
| CN204756188U (en) * | 2015-07-27 | 2015-11-11 | 冯若愚 | Prestressed concrete PE steel sleeve pipe |
| CN105401955A (en) * | 2015-11-30 | 2016-03-16 | 武汉大学 | Seepage-proofing bearing structure of soft soil pressure tunnel |
| CN105650400A (en) * | 2016-03-31 | 2016-06-08 | 中国水利水电科学研究院 | Internal strengthening and reinforcing method and strengthening combined structure for PCCP (prestressed concrete cylinder pipes) with broken wires |
| CN206234492U (en) * | 2016-10-10 | 2017-06-09 | 北京中水科海利工程技术有限公司 | A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107443812A (en) * | 2017-07-27 | 2017-12-08 | 北京中水科海利工程技术有限公司 | A kind of high elastic course and its application |
| CN107443812B (en) * | 2017-07-27 | 2019-08-13 | 北京中水科海利工程技术有限公司 | A kind of high elastic course and its application |
| CN111720667A (en) * | 2020-06-22 | 2020-09-29 | 中国水利水电科学研究院 | Compound carbon fiber reinforcing method for inner wall of water pipeline |
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| Publication number | Publication date |
|---|---|
| CN106352165B (en) | 2018-08-31 |
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