CN106352165B - A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design - Google Patents
A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design Download PDFInfo
- Publication number
- CN106352165B CN106352165B CN201610883948.5A CN201610883948A CN106352165B CN 106352165 B CN106352165 B CN 106352165B CN 201610883948 A CN201610883948 A CN 201610883948A CN 106352165 B CN106352165 B CN 106352165B
- Authority
- CN
- China
- Prior art keywords
- pccp
- carbon fiber
- reinforcing structure
- layer
- fiber reinforcing
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to a kind of pre-stressed carbon fiber reinforcing structure design of PCCP pipes, the PCCP pipes pre-stressed carbon fiber reinforcing structure includes successively from inboard to outside：Flexible barrier coating, carbon fibre cloth layer, elasticity and stiff assembly bed course and PCCP pipes（Prestressed concrete cylinder pipe）.PCCP pipes pre-stressed carbon fiber reinforcing structure provided by the invention, by the way that elastic insert is arranged, under the premise of ensureing that PCCP manages no apparent stress, increase the deflection of carbon fibre cloth layer, to increase the tensile stress that carbon fibre cloth layer can bear, that is pre-stressed carbon fiber, and then reduce the stress for being distributed to PCCP pipes, it avoids PCCP pipe concretes and crack or compressor wire fracture occurs, so that the high intensity advantage of carbon fibre material is not fully exerted, farthest increases reinforcing effect of the carbon fiber to PCCP pipes.
Description
Technical field
The present invention relates to hydraulic engineering fields, and in particular to a kind of PCCP pipes pre-stressed carbon fiber reinforcing structure is set
Meter.
Background technology
Prestressed concrete cylinder pipe (Prestressed Concrete Cylinder Pipe, write a Chinese character in simplified form PCCP pipe) is
Refer to and wind ring orientation prestress steel wire on the high-strength concrete tube core with steel cylinder, then the cement mortar of spray densification on it is protected
Sheath and manufactured water-supply-pipe.It is the composite pipe being made of sheet metal, high tensile steel wire and concrete, and synthesis has played steel
Tension, easily sealing and concrete resistance to compression, corrosion resistance, have high leakproofness, the characteristic of high intensity and high-impermeable, extensively
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 pipe etc..Compared with previous tubing, PCCP pipes are with applied widely, the economic life is long, shock resistance
Can be good, easy for installation, substantially water-tight the advantages that.It is more and more using the engineering of PCCP pipes in China's water diversion project at present.
But due to design, Construction defect, operational management are improper etc., multiple engineerings occurs at present and booster phenomenon have occurred, sternly
Threaten the safe operation of aqueduct again.Most of booster is due to winding ring orientation prestress steel wire on high-strength concrete tube core
Caused by there is fracture of wire, in order to prevent trouble before it happens, the PCCP pipes to being tested with fracture of wire are reinforced.
The reinforcing of PCCP pipes may be used displacement, increase external section, steel bonding method, liner steel drum, paste outside carbon fiber and
The methods of inside sticking carbon fiber.These methods are with their own characteristics, have both advantages and disadvantages.Inside sticking carbon fiber reinforces PCCP Manifold technologies
Carbon fibre material is pasted on concrete surface on the inside of PCCP pipes by resinae cementing material, is reached by the collective effect of the two
To reinforcement and strengthening, a kind of reinforcement technique of improvement structure tension performance.Compared with other reinforcement techniques, this technology is without large size
Construction equipment, easy construction, efficient, quality easily ensure.Carbon fibre material generally has good corrosion resistance and durability, piece
Material is lighter and thin, does not increase original structure dead weight substantially and does not reduce the cross-section of river of PCCP pipes.But a large amount of experimental study and work
Journey practice have shown that, it is current to reinforce PCCP Manifold technologies from inside sticking carbon fiber there are some inherent shortcomings, due to carbon fiber bullet
Property modulus is much lower with respect to its intensity, and when Developed fiber strength needs larger deformation, it is difficult to inhibit the deformations of PCCP pipe structures and split
The development of seam causes with carbon cloth reinforced PCCP pipes effect unobvious.As in lower stress level, PCCP is managed carbon fiber
Crack or the fracture of outside compressor wire will occur in concrete, prevent the high intensity advantage of carbon fibre material from being had
Effect plays.These defects largely reduce the effect that carbon fiber reinforces PCCP pipes, increase reinforcing
Cost.
Invention content
For improve the deficiencies in the prior art, propose a kind of reinforcing structure design, can high pressure water effect under maximum journey
Degree is reinforced PCCP using the advantage of carbon fiber high-strength degree and is managed, and the present invention provides a kind of pre-stressed carbon fiber reinforcing PCCP pipes
Structure design, be set to PCCP inside pipe walls, the PCCP pipes pre-stressed carbon fiber reinforcing structure design includes：
Flexible barrier coating is set to PCCP pipe most inner sides, for preventing in pipe in water penetration to carbon cloth and bed course；
Carbon fibre cloth layer is set between flexible barrier coating and bed course, PCCP pipes is shared under interior effect of water pressure and are born
Tensile stress；
Bed course, including spaced elastic insert and rigid cushion layer, wherein
Elastic insert is set between the concrete layer and carbon fibre cloth layer of PCCP inside pipe walls, for increasing carbon fibre cloth layer
Deflection；
Rigid cushion layer is set between the concrete layer and carbon fibre cloth layer of PCCP inside pipe walls, with elastic insert in same layer,
Connection for reinforcing carbon cloth and PCCP pipes；
Wherein, the width of aforementioned rigid cushion layer is between 0-30cm, and thickness is between 3-6mm.
Wherein, the width of aforementioned flexible bed course is between 20-50cm, and thickness is between 3-6mm.
Wherein, the thickness of aforementioned flexible bed course is equal to rigid cushion layer.
Wherein, the material of aforementioned rigid cushion layer is epoxy putty or epoxy resin mortar.
Wherein, the material of aforementioned flexible bed course is compressible low-elasticity-modulus polyurathamc, the poly- ammonia of the low-elasticity-modulus foaming
The decrement of ester is more than 40%.
Wherein, aforementioned carbon fibre cloth layer is set as 1-3 layers, by carbon fiber binder paste elastic insert after hardening and
On rigid cushion layer.
Wherein, the material of aforementioned carbon fiber binder 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.
PCCP pipes pre-stressed carbon fiber reinforcing structure design provided by the invention is being protected by the way that elastic insert is arranged
On the basis of PCCP pipes are demonstrate,proved without obviously deforming, the deflection of carbon fibre cloth layer is increased, to increase carbon fibre cloth layer institute
The tensile stress that can be born, and then reduce the stress for being distributed to PCCP pipes, effectively prevent PCCP pipe concretes occur crack or
Compressor wire be broken, make carbon fibre material high intensity advantage be effectively played, increase carbon fiber pair to the greatest extent
The reinforcing effect of PCCP pipes.
Description of the drawings
Fig. 1：PCCP pipes pre-stressed carbon fiber reinforcing structure design schematic diagram according to the ... of the embodiment of the present invention.
Specific implementation mode
In order to which the PCCP pipe pre-stressed carbon fiber reinforcing structure designs to the present invention have further understanding, below
Coordinate the attached drawing structure design that the present invention will be described in detail and its effect of generation.
Fig. 1 is the PCCP pipe pre-stressed carbon fiber reinforcing structure design schematic diagrames of one embodiment of the invention, such as Fig. 1
Shown, the present invention provides a kind of PCCP pipes pre-stressed carbon fiber reinforcing structures, are set in PCCP pipes, from inboard to outer
Side includes successively：Flexible protective coating 1, carbon fibre cloth layer 2 and bed course, the bed course include elastic insert 31 and rigid cushion layer
32。
When it is implemented, the flexible protective coating 1 can also be omitted selectively, and make the PCCP of preparation manage in only include
From inboard to the carbon fibre cloth layer 2, elastic insert 31+ rigid cushion layers 32 and steel cylinder concrete layer 4 in outside, but in flexible protective
In the presence of coating 1, carbon fiber is can effectively avoid while playing its high-strength characteristic, since carbon fibre cloth layer 2 is stretched
Long rate is larger, deformation is larger and the situation of microcrack occurs in surface caused by possibility, so as to effectively solve to make in high pressure water
The problem of with the pre-stressed carbon fiber antiseepage of lower PCCP pipes inside.
In the present invention, by the way that bed course is arranged between carbon fibre cloth layer 2 and steel cylinder concrete layer 4, bed course includes cushion
Layer 31 and rigid cushion layer 32 can increase the deformation of carbon fibre cloth layer 2 on the basis of ensureing PCCP pipes without obviously deforming
Amount, to increase the tensile stress that carbon fibre cloth layer 2 can bear, and then reduce the stress for being distributed to steel cylinder concrete layer 4,
PCCP pipe concretes are avoided simultaneously and crack or compressor wire fracture occur, and the high intensity advantage of carbon fibre material is made to be had
Effect plays, and increases consolidation effect of the carbon fiber to PCCP pipes to the greatest extent.Its particular technique principle is made in internal water pressure
Under, 31 compressive deformation of elastic insert leads to 2 tension of carbon fibre cloth layer on its surface, that is, applying to carbon fibre cloth layer 2
Pre-tensile stress, carbon fibre cloth layer 2 there has been certain deformation, can first undertake water in a part because being in tension state
Pressure, then internal water pressure is born together with the steel cylinder concrete layer 4 on periphery, therefore carbon fiber high-tensile can be given full play to
The characteristics of.
When it is implemented, as shown in Figure 1, elastic insert 31 and the setting of the interval of rigid cushion layer 32, wherein elastic insert 31
Decrement is far longer than rigid cushion layer 32, so that the carbon fibre cloth layer 2 on its surface can be driven to generate is larger for elastic insert 31
Deformation, to make carbon fibre cloth layer 2 bear larger tensile stress, and what the carbon fibre cloth layer 2 on 32 surface of rigid cushion layer generated
Deformation is smaller, therefore in real process, can be adjusted by adjusting the thickness and width of elastic insert 31 and rigid cushion layer 32
The prestretching degree of whole carbon fibre cloth layer 2.
The width of the elastic insert 32 is situated between 20-50cm, thickness between 3-6mm, the width of the rigid cushion layer 31
In 0-30cm, thickness is identical as the thickness of elastic insert.
Certainly, in the case where ensureing elastic insert 31 with carbon fiber strong bond, rigid cushion layer 32 can also be omitted
Setting, and entire bed course is set as elastic insert 31.
When it is implemented, the material of the rigid cushion layer 32 can be set as epoxy putty or epoxy resin mortar；The elastic insert
31 material can be set as compressible low-elasticity-modulus polyurathamc, it is of course also possible to other materials are set as, as long as can be effectively increased
The deflection of carbon fibre cloth layer 2, at the same with PCCP pipe strong bonds.
In the present invention, the carbon fibre cloth layer 2 is preferably set to 1-3 layers, passes through carbon fiber binder（It is not shown）It pastes
On bed course after solidification.
In the present invention, the material of the carbon fiber binder is preferably epoxy resin.
In the present invention, for the thickness of the flexible protective coating 1 between 1-2mm, material is preferably one-component polyureas.
PCCP pipes pre-stressed carbon fiber reinforcing structure provided by the invention, mainly operation is formed as follows：
（1）According to the size of PCCP pipe diameters, the 4 inner surface brushing rigid cushion layer of steel cylinder concrete layer in PCCP pipes
32, several areas will be divided on the inside of PCCP pipes；
（2）The elastic insert 31 of brushing stack pile between each rigid cushion layer 32；
（3）After the solidification of elastic insert 31, in its external coating carbon fiber binder, pre-stressed carbon fiber is pasted in layering
Cloth forms multi-storey up-down and translation layer 2；
（4）After the solidification of carbon fiber binder, in 2 external coating flexible protective layer 1 of carbon fibre cloth layer, wherein flexible protective
The thickness of layer 1 is between 1.5-2mm.
In this way, the PCCP pipes including rigid cushion layer 32 and elastic insert 31 have just been made, certainly, needing to omit rigid pad
In the case of layer 32, step can also be omitted（1）, and directly in 4 inner surface brushing cushion of the steel cylinder concrete layer of PCCP pipes
Layer 31.
To sum up, PCCP pre-stressed carbon fibers reinforcing structure provided by the invention, has the following advantages that：
（1）By the way that elastic insert is arranged, on the basis of ensureing PCCP pipes without obviously deforming, carbon fibre cloth layer is increased
Deflection, be distributed to answering for steel cylinder concrete layer to increase the stress that carbon fibre cloth layer can bear, and then reduce
Power, while avoiding PCCP pipe concretes and crack or compressor wire fracture occur, so that the high intensity advantage of carbon fibre material is obtained
It is played to effective, increases consolidation effect of the carbon fiber to PCCP pipes to the greatest extent.It is to increase carbon that rigid cushion layer, which is arranged,
The globality of fibrous layer and PCCP pipes.
（2）Rigid cushion layer and elastic insert are set by interval, the prestretching of carbon fibre cloth layer can be adjusted according to actual needs
Degree, to enable the invention to be applied to a variety of occasions.
（3）By setting flexible protective coating, carbon fiber is can effectively avoid while playing its high-strength characteristic, due to
Carbon fibre cloth layer elongation is larger, deformation is larger and the situation of microcrack occurs in surface caused by possibility, so as to effectively solve
Certainly under high pressure water effect the problem of PCCP pipe pre-stressed carbon fiber antiseepages.
Although the present invention is illustrated using above-mentioned preferred embodiment, the protection model that however, it is not to limit the invention
It encloses, any those skilled in the art are not departing within the spirit and scope of the present invention, and opposite above-described embodiment carries out various changes
It is dynamic still to belong to the range that the present invention is protected with modification, therefore protection scope of the present invention is subject to what claims were defined.
Claims (9)
1. a kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design is set to PCCP inside pipe walls, which is characterized in that described
PCCP pipe pre-stressed carbon fiber reinforcing structure designs include：
Flexible barrier coating is set to PCCP pipe most inner sides, for preventing in pipe in water penetration to carbon cloth and bed course；
Carbon fibre cloth layer is set between flexible barrier coating and bed course, the drawing that PCCP pipes are born is shared under interior effect of water pressure
Stress；
Bed course, including spaced elastic insert and rigid cushion layer, wherein
Elastic insert is set between the concrete layer and carbon fibre cloth layer of PCCP inside pipe walls, the deformation for increasing carbon fibre cloth layer
Amount；
Rigid cushion layer is set between the concrete layer and carbon fibre cloth layer of PCCP inside pipe walls, with elastic insert in same layer, is used for
Reinforce the connection of carbon cloth and PCCP pipes.
2. PCCP pipes pre-stressed carbon fiber reinforcing structure design as described in claim 1, which is characterized in that the elasticity
The width of bed course is between 20-50cm, and thickness is between 3-6mm.
3. PCCP pipes pre-stressed carbon fiber reinforcing structure design as described in claim 1, which is characterized in that the rigidity
The width of bed course is between 0-30cm, and thickness is between 3-6mm.
4. PCCP pipes pre-stressed carbon fiber reinforcing structure design as described in claim 1, which is characterized in that the elasticity
Cushion thickness is equal to the thickness of rigid cushion layer.
5. the PCCP pipe pre-stressed carbon fiber reinforcing structure designs as described in any one of claim 1-4, feature exist
In the material of the elastic insert is compressible low-elasticity-modulus polyurathamc, the decrement of the low-elasticity-modulus polyurathamc
More than 40%.
6. the PCCP pipe pre-stressed carbon fiber reinforcing structure designs as described in any one of claim 1-4, feature exist
In the material of the rigid cushion layer is epoxy putty or epoxy resin mortar.
7. PCCP pipes pre-stressed carbon fiber reinforcing structure design as described in claim 1, which is characterized in that the carbon fiber
Dimension layer of cloth is set as 1 ~ 3 layer, is pasted on elastic insert and rigid cushion layer after hardening by carbon fiber binder.
8. PCCP pipes pre-stressed carbon fiber reinforcing structure design as claimed in claim 7, which is characterized in that the carbon fiber
The material for tieing up binder is epoxy resin.
9. PCCP pipes pre-stressed carbon fiber reinforcing structure design as described in claim 1, which is characterized in that flexible protective
For the thickness of coating between 1 ~ 2mm, the material of the flexible protective coating is one-component polyureas.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106352165A CN106352165A (en) | 2017-01-25 |
| CN106352165B true CN106352165B (en) | 2018-08-31 |
Family
ID=57865714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610883948.5A Active CN106352165B (en) | 2016-10-10 | 2016-10-10 | A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106352165B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| 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. |
-
2016
- 2016-10-10 CN CN201610883948.5A patent/CN106352165B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106352165A (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104675141B (en) | A kind of FRP pipe constraint cement-base composite material reinforces pillarwork | |
| CN202117165U (en) | Composite structure with fibre compound material barrel confining concrete-filled steel tube | |
| CN101503881B (en) | Method for reinforcing underwater structure by fiber-reinforced composite material grid ribs | |
| CN110952996B (en) | Method and material for reinforcing electric power tunnel by fiber grid reinforced polymer mortar | |
| CN205877455U (en) | Prestressing force steel cylinder concrete pipe | |
| CN105650400B (en) | Method for reinforcing and reinforcement combining structure inside PCCP fracture of wires pipe | |
| CN206635632U (en) | A kind of FRP constraint concrete-filled steel tubular arch | |
| CN209323348U (en) | Hollow sandwich multi-cavity steel tube concrete component | |
| CN113718777A (en) | Mass concrete crack prevention construction method | |
| CN106352165B (en) | A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design | |
| CN106835936A (en) | A kind of FRP constraint concrete-filled steel tubular arch | |
| CN111502326A (en) | Rapid prestress FRP grid reinforcing method | |
| CN106287001B (en) | Penstock reinforcing bar composite concrete pipe and the pipeline and production method being made from it | |
| CN108824228A (en) | A kind of method of bamboo combined housing reinforced bridge pier | |
| CN208058251U (en) | A kind of gasbag-type ring orientation prestress bracing means in pipe | |
| CN206234492U (en) | A kind of PCCP pipes pre-stressed carbon fiber reinforcing structure design | |
| CN207348317U (en) | A kind of steel tube regeneration concrete column that rubber bound thin layer and built-in stiffener are set | |
| CN204571341U (en) | A kind of FRP pipe constraint cement-base composite material reinforces pillarwork | |
| CN208058252U (en) | Ring orientation prestress repairing and reinforcing system in a kind of pipe | |
| CN113338543B (en) | Prestressed anchoring system and anchoring method for FRP (fiber reinforced Plastic) rod | |
| CN113026796B (en) | Wind power generation tower foundation ring foundation reinforcing structure and method | |
| CN109373061A (en) | Prestressed concrete cylinder pipe end leakage preventing structure and its processing method | |
| CN210890420U (en) | Prestressed ultra-high performance concrete pressure pipe | |
| CN208857718U (en) | A kind of structure of bamboo combined housing reinforced bridge pier | |
| CN204059754U (en) | The concrete beam that a kind of FRP grid is reinforced |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |