CN210105377U - FRP (fiber reinforced Plastic) -expansion ECC (error correction code) composite pipe for prestress reinforcement of pressure steel pipe - Google Patents
FRP (fiber reinforced Plastic) -expansion ECC (error correction code) composite pipe for prestress reinforcement of pressure steel pipe Download PDFInfo
- Publication number
- CN210105377U CN210105377U CN201920903173.2U CN201920903173U CN210105377U CN 210105377 U CN210105377 U CN 210105377U CN 201920903173 U CN201920903173 U CN 201920903173U CN 210105377 U CN210105377 U CN 210105377U
- Authority
- CN
- China
- Prior art keywords
- fiber cloth
- steel
- steel ring
- steel pipe
- cloth layer
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 131
- 239000010959 steel Substances 0.000 title claims abstract description 131
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 230000002787 reinforcement Effects 0.000 title claims description 16
- 229920002430 Fibre-reinforced plastic Polymers 0.000 title description 9
- 239000011151 fibre-reinforced plastic Substances 0.000 title description 9
- 238000012937 correction Methods 0.000 title description 2
- 239000004744 fabric Substances 0.000 claims abstract description 84
- 239000000835 fiber Substances 0.000 claims abstract description 68
- 230000007547 defect Effects 0.000 claims abstract description 26
- 230000002950 deficient Effects 0.000 claims abstract description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 9
- 239000004917 carbon fiber Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920006327 polystyrene foam Polymers 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model discloses a FRP-inflation ECC composite pipe for pressure steel pipe prestressing force is consolidated, its surface that sets up at the defect steel pipe, include: the expansion ECC layer wraps the outer surface of the defective steel pipe; the fiber cloth layer is wrapped on the outer surface of the expansion ECC layer; the steel ring I is provided with a conical outer surface, is sleeved at two ends of the defect steel pipe respectively and is positioned between the fiber cloth layer and the defect steel pipe; the inner surface of the end part of the fiber cloth layer is sleeved on the steel ring I; the steel ring II is sleeved on the outer surface of the end part of the fiber cloth layer and corresponds to the position of the steel ring I, so that the fiber cloth layer is fixed between the steel ring I and the steel ring II; wherein, the upper end that is located the steel ring I of defect steel pipe one end is provided with axial upper portion preformed hole, and the lower extreme that is located the steel ring I of the defect steel pipe other end is provided with axial lower part preformed hole. The utility model provides a defect steel pipe cause the defect owing to corrode in the use, and need restore reinforced (rfd) problem again when in-service use.
Description
Technical Field
The utility model belongs to civil engineering FRP fibre cloth field especially relates to a FRP-expansion ECC composite pipe for pressure steel pipe prestressing force is consolidated.
Background
Fiber Reinforced Plastic (FRP) has the advantages of high tensile strength, light weight, corrosion resistance, thermal expansion coefficient close to that of concrete, and the like, has been widely accepted and applied in the field of civil engineering since the past and is gradually a research hotspot in the field. The fiber cloth has high strength, small density and thin thickness, the self weight and the section size of the reinforcing member are not increased basically, the fiber cloth is used for tensile, shearing and seismic reinforcement of the structural member, and the material and matched impregnating adhesive are used together to form a carbon fiber composite material which can form a complete carbon fiber cloth sheet reinforcing system with excellent performance. Since the air containing water and air and carbon dioxide contact with iron to generate chemical reaction, and the common iron containing carbon, carbon element and iron form countless galvanic cells on the surface of iron in the solution of water and carbon dioxide in air, the corrosion of steel pipe is accelerated, if the steel pipe is buried underground, the chemical element in soil also accelerates the corrosion of steel pipe, so the steel pipe will inevitably encounter the problem of corrosion and need to be reinforced in use. The traditional repairing method for the steel pipe comprises the following steps: welding and replacement have great influence on the normal use of the pipeline. Therefore, the steel pipe has a bottleneck in the case where reinforcement is required due to corrosion, and an apparatus for repairing and reinforcing the steel pipe is required to further develop the value of the steel pipe. The development of a safe, economic and practical repair reinforcing system is a precondition for researching steel pipe reinforcement and repair, and is one of the keys for marketing and applying the steel pipe reinforcement prestressed anchorage to actual structures.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages which will be described later.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an FRP-expansion ECC composite pipe for pressure steel pipe prestress reinforcement, which is provided on an outer surface of a defective steel pipe, including:
the expansion ECC layer wraps the outer surface of the defective steel pipe;
the fiber cloth layer is wrapped on the outer surface of the expansion ECC layer;
the steel ring I is provided with a conical outer surface, is sleeved at two ends of the defect steel pipe respectively and is positioned between the fiber cloth layer and the defect steel pipe; the inner surface of the end part of the fiber cloth layer is sleeved on the steel ring I;
the steel ring II is sleeved on the outer surface of the end part of the fiber cloth layer and corresponds to the position of the steel ring I, so that the fiber cloth layer is fixed between the steel ring I and the steel ring II;
wherein, the upper end that is located the steel ring I of defect steel pipe one end is provided with axial upper portion preformed hole, and the lower extreme that is located the steel ring I of the defect steel pipe other end is provided with axial lower part preformed hole.
Preferably, the fiber cloth layer is any one of a bidirectional carbon fiber cloth layer, an aramid fiber cloth layer, a high-strength glass fiber cloth layer and a basalt fiber cloth layer.
Preferably, the fiber cloth layer is a multi-layer fiber cloth, and the multi-layer fiber cloth is formed by winding the fiber cloth for multiple times; epoxy resin glue is coated between each layer of the multi-layer fiber cloth, and the fiber cloth is completely soaked.
Preferably, the thickness of the bidirectional carbon fiber cloth is 0.12-0.15 mm.
Preferably, the steel ring I is formed by connecting two semicircular steel rings I with semi-conical outer surfaces through a clamping hoop; and the steel ring II is formed by connecting two semicircular steel rings II through a clamping hoop.
Preferably, the end of the conical surface of the steel ring I with the conical outer surface is provided with a plurality of axial branch pipes.
The utility model discloses at least, include following beneficial effect:
the utility model provides a steel pipe cause the defect because of corroding in the use, and need restore reinforced (rfd) problem again during practical application. When the prestressed anchorage device is produced in large batch, the steel ring I with the conical outer surface has good plasticity and low requirement on materials, and can be produced according to actual requirements. The FRP-expansion ECC composite pipe has simple structure, reasonable design and convenient implementation, and can be widely applied to engineering; the utility model discloses a FRP-inflation ECC composite pipe is the adhesive tape simultaneous action, and the encapsulating between fibre cloth and steel pipe for bond fibre cloth and steel pipe, use annular ground tackle anchor outside the sleeve for the bonding of fibre cloth and steel pipe is more firm, and is more favourable to the reinforcement restoration of steel pipe, adopts the inflation ECC layer can show the ultimate strength who improves FRP-inflation ECC composite pipe.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
FIG. 1 is a longitudinal cross-sectional view of the FRP-expanded ECC composite pipe of the present invention;
FIG. 2 is a top view of the FRP-expanded ECC composite pipe of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a left side view of the steel ring I with a tapered outer surface at the left end of FIG. 1;
FIG. 5 is a right side view of the steel ring I with a tapered outer surface at the right end of FIG. 1;
FIG. 6 is a detail of the left end of FIG. 1;
FIG. 7 is a left side view of FIG. 1;
FIG. 8 is a right side view of FIG. 1;
FIG. 9 is a detail view of the right end of FIG. 1;
FIG. 10 is a front view of steel ring I with a tapered outer surface;
FIG. 11 is a front view of steel ring II;
FIG. 12 is a longitudinal cross-sectional view of another FRP-expanded ECC composite pipe of the present invention;
fig. 13 is a front view of a steel ring i with a conical outer surface according to another structure of the present invention.
The specific implementation mode is as follows:
the present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Fig. 1 to 11 show the utility model discloses a FRP-expansion ECC composite pipe for pressure steel pipe prestressing reinforcement, it sets up at the surface of defect steel pipe 1, include:
the expansion ECC layer 6 wraps the outer surface of the defective steel pipe 1;
the fiber cloth layer 2 wraps the outer surface of the expansion ECC layer 6;
the steel ring I7 is provided with a conical outer surface 71, is respectively sleeved at two ends of the defect steel pipe 1 and is positioned between the fiber cloth layer 2 and the defect steel pipe 8; the inner surface of the end part of the fiber cloth layer 2 is sleeved on the steel ring I7; the steel ring I is arranged under the fiber cloth layer in a cushioning mode, so that the function of fixing the fiber cloth layer composite pipeline can be achieved; the steel ring I with the conical outer surface is adopted, so that when the steel ring I is padded below the fiber cloth layer composite pipeline, the conical interface is favorable for inserting the steel ring I, and the fiber cloth layer composite pipeline and the steel ring I can be attached more closely;
the steel ring II 4 is sleeved on the outer surface of the end part of the fiber cloth layer 2 and corresponds to the position of the steel ring I7, so that the fiber cloth layer 2 is fixed between the steel ring I7 and the steel ring II 4;
wherein, the upper end that is located steel ring I7 of 1 one end of defect steel pipe is provided with axial upper portion preformed hole 3, and the lower extreme that is located steel ring I7 of the 1 other end of defect steel pipe is provided with axial lower part preformed hole 5.
In the technical scheme, the fiber cloth layer is fixed through the steel ring I and the steel ring II with the conical outer surfaces, the fiber cloth layer and the defect steel pipe are firmer and more beneficial to reinforcing the defect steel pipe, the expansion ECC layer has the function of regenerating and expanding between the fiber cloth layer and the defect steel pipe, stress is applied to the fiber cloth layer, inward pressure is generated on the defect steel pipe, and the ultimate strength of the FRP-expansion ECC composite pipe is improved; the fiber cloth layer is pasted, so that the effects of protecting steel and preventing corrosion can be achieved; further promote the application of the FRP fiber cloth in engineering.
In the above technical solution, the fiber cloth layer is any one of a bidirectional carbon fiber cloth layer, an aramid fiber cloth layer, a high-strength glass fiber cloth layer, and a basalt fiber cloth layer.
In the technical scheme, the fiber cloth layer is a plurality of layers of fiber cloth, and the plurality of layers of fiber cloth are formed by winding the fiber cloth for multiple times; the multilayer fiber cloth is at 0 degree and 45 degrees along the length direction of the fiber cloth according to the fiber yarns; epoxy resin glue is coated between each layer of the multi-layer fiber cloth, and the fiber cloth is completely soaked. By adopting the mode, the structure of the multilayer fiber cloth can better protect the steel pipe and prevent corrosion, and the ultimate strength of the FRP-expansion ECC composite pipe can be improved.
In the technical scheme, the thickness of the bidirectional carbon fiber cloth is 0.12-0.15 mm.
In the technical scheme, the steel ring I7 is formed by connecting two semicircular steel rings I72 with semi-conical outer surfaces through a clamping hoop; the steel ring II 4 is formed by connecting two semicircular steel rings II 41 through a hoop, and by adopting the mode and the hoop connection mode, the steel ring I7 and the steel ring II 4 can be fastened and disassembled, so that the formed FRP-expansion ECC composite pipe is firmly fixed and conveniently disassembled.
In the technical scheme, as shown in fig. 12 to 13, a plurality of axial branch pipes 73 are arranged at the end part of the conical surface of the steel ring I7 with the conical outer surface, and by adopting the mode, the plurality of branch pipes can be tightly filled by the expansion ECC in the construction process, so that the branch pipes can be tightly and fixedly connected with the expansion ECC, and the ultimate strength of the FRP-expansion ECC composite pipe is further improved.
The utility model discloses a construction process for FRP-expansion ECC composite pipe that pressure steel pipe prestressing force was consolidated does: polishing the surface of the defective steel pipe smoothly, wiping the surface with alcohol, and then adhering the polystyrene foam to the surface of the defective steel pipe by using special glue for pearl wool; after the polystyrene foam is fixed, winding fiber cloth on the surface of the polystyrene foam, smearing epoxy resin in the winding process, completely soaking the fiber cloth, and then maintaining; forming a fiber cloth layer after the fiber cloth and the epoxy resin are solidified; then dissolving polystyrene foam between the fiber cloth layer and the surface of the defective steel pipe by using a mixed solvent of n-butyl acetate and xylene with the volume ratio of 1:2, and cleaning; sleeving a steel ring I with a conical outer surface between a fiber cloth layer and a defect steel pipe, enabling the conical outer surfaces of the steel ring I at two ends to be oppositely arranged, arranging an upper preformed hole at the topmost part, and arranging the upper preformed hole at the bottommost part through a lower preformed hole; sleeving a steel ring II on the outer surface of the end part of the fiber cloth layer and corresponding to the position of the steel ring I so as to fix the fiber cloth layer between the steel ring I and the steel ring II; injecting expansion ECC from the lower preformed hole, stopping injecting when the expansion ECC overflows from the upper preformed hole, blocking the lower preformed hole and the upper preformed hole, maintaining to form an expansion ECC layer, and obtaining the FRP-expansion ECC composite pipe for the prestress reinforcement of the pressure steel pipe; the adopted expansion ECC is a material commonly existing in the prior art, for example, the ECC adopted in the utility model-CN 201720727397.3 a steel bar reinforced ECC concrete combined T-shaped beam can be adopted; the ECC adopted in the FRP rib-steel bar composite reinforced ECC-concrete combined T-shaped beam of the utility model CN201820231906.8 is adopted; the ECC adopted in the reinforced concrete flexural member reinforced by the ECC and the carbon fiber cloth composite of the utility model CN201620364740.8 is adopted.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (6)
1. An FRP-expansion ECC composite pipe for prestress reinforcement of a pressure steel pipe, which is arranged on the outer surface of a defective steel pipe, is characterized by comprising:
the expansion ECC layer wraps the outer surface of the defective steel pipe;
the fiber cloth layer is wrapped on the outer surface of the expansion ECC layer;
the steel ring I is provided with a conical outer surface, is sleeved at two ends of the defect steel pipe respectively and is positioned between the fiber cloth layer and the defect steel pipe; the inner surface of the end part of the fiber cloth layer is sleeved on the steel ring I;
the steel ring II is sleeved on the outer surface of the end part of the fiber cloth layer and corresponds to the position of the steel ring I, so that the fiber cloth layer is fixed between the steel ring I and the steel ring II;
wherein, the upper end that is located the steel ring I of defect steel pipe one end is provided with axial upper portion preformed hole, and the lower extreme that is located the steel ring I of the defect steel pipe other end is provided with axial lower part preformed hole.
2. An FRP-expansion ECC composite pipe for prestress reinforcement of a penstock according to claim 1, wherein the fiber cloth layer is any one of a bidirectional carbon fiber cloth layer, an aramid fiber cloth layer, a high-strength glass fiber cloth layer and a basalt fiber cloth layer.
3. The FRP-expanded ECC composite pipe for prestress reinforcement of the penstock and the like according to claim 1, wherein the fiber cloth layer is a multi-layer fiber cloth formed by winding the fiber cloth for a plurality of times; epoxy resin glue is coated between each layer of the multi-layer fiber cloth, and the fiber cloth is completely soaked.
4. The FRP-expanded ECC composite pipe for prestress reinforcement of penstock according to claim 2, wherein the thickness of the bidirectional carbon fiber cloth is 0.12-0.15 mm.
5. An FRP-expanded ECC composite pipe for prestress reinforcement of pressure steel pipe according to claim 1 wherein the steel ring I is composed of two semicircular steel rings I with semi-conical outer surface connected by a hoop; and the steel ring II is formed by connecting two semicircular steel rings II through a clamping hoop.
6. An FRP-expanded ECC composite pipe for prestressed reinforcement of steel penstocks as claimed in claim 1, characterized in that the end of the conical surface of the steel ring I with conical outer surface is provided with a plurality of axial branch pipes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018215751774 | 2018-09-27 | ||
| CN201821575177 | 2018-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210105377U true CN210105377U (en) | 2020-02-21 |
Family
ID=69565415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920903173.2U Expired - Fee Related CN210105377U (en) | 2018-09-27 | 2019-06-17 | FRP (fiber reinforced Plastic) -expansion ECC (error correction code) composite pipe for prestress reinforcement of pressure steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210105377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057395A (en) * | 2018-09-27 | 2018-12-21 | 西南科技大学 | FRP- for penstock prestressed reinforcement expands ECC multiple tube and its construction technology |
-
2019
- 2019-06-17 CN CN201920903173.2U patent/CN210105377U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057395A (en) * | 2018-09-27 | 2018-12-21 | 西南科技大学 | FRP- for penstock prestressed reinforcement expands ECC multiple tube and its construction technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101560816B (en) | FRP rib fibre cloth winding coaxial connection method | |
| US6878323B2 (en) | Method of manufacturing a stay-in-place form | |
| RU2706663C2 (en) | Composite system with unidirectional fibres for repair and reinforcement of structures | |
| US3340115A (en) | Method of making a reinforced composite concrete pipe | |
| CN1853847B (en) | Method for repairing and reinforcing weld seam defects | |
| WO2006034653A1 (en) | Carbon fiber composite for repairing and reinforcing pipelines having defects and the method of application | |
| WO2012029966A1 (en) | Steel structure reinforcement method and reinforcement body, and material for forming elastic layer for steel structure reinforcement | |
| WO2021032140A1 (en) | Pre-tightening force repairing method, repairing method involving combination of pre-tightening force and clamp, and repaired pipeline | |
| US20160178108A1 (en) | Repair and reinforcement of pressurized pipes | |
| CN105650400B (en) | Method for reinforcing and reinforcement combining structure inside PCCP fracture of wires pipe | |
| WO2002001020A1 (en) | Structure reinforcing method, structure-reinforcing reinforcing fiber yarn-containing material, reinforcing structure material and reinforced structure | |
| CN102936941A (en) | Composite pipe concrete composite structure | |
| USRE27061E (en) | Method of making a reinforced composite concrete pipe | |
| JP4035297B2 (en) | Reinforcing structure and reinforcing method for concrete structure | |
| CN110541417A (en) | Anchor cable of continuous basalt fiber composite reinforcement | |
| CN210105377U (en) | FRP (fiber reinforced Plastic) -expansion ECC (error correction code) composite pipe for prestress reinforcement of pressure steel pipe | |
| CN106835936A (en) | A kind of FRP constraint concrete-filled steel tubular arch | |
| CN101813227A (en) | Method for maintaining and reinforcing metallic tubular structure | |
| JP5645440B2 (en) | Structure reinforcement method | |
| JP2018109268A (en) | Method to reinforce concrete structure, concrete structure and flexible continuous fiber reinforcement material | |
| CN103243711A (en) | Composite pipe pile with inner ribs | |
| JP6830763B2 (en) | Seismic retrofitting material | |
| EP0912325B1 (en) | Fiber-reinforced resin pipe having improved impact resistance and production method | |
| CN109057395B (en) | FRP-expansion ECC composite pipe for prestress reinforcement of pressure steel pipe and construction process thereof | |
| CN205655031U (en) | Compound back lining integrated configuration of reinforcement prevention of seepage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |