CN212743146U - Large-diameter prestressed carbon fiber reinforced plastic cable anchorage - Google Patents
Large-diameter prestressed carbon fiber reinforced plastic cable anchorage Download PDFInfo
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- CN212743146U CN212743146U CN202020975704.1U CN202020975704U CN212743146U CN 212743146 U CN212743146 U CN 212743146U CN 202020975704 U CN202020975704 U CN 202020975704U CN 212743146 U CN212743146 U CN 212743146U
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- carbon fiber
- plastic cable
- steel pipe
- fiber reinforced
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Abstract
The utility model relates to a civil engineering technical field just discloses a major diameter prestressing force carbon fiber reinforced plastic cable ground tackle, including stretch-draw pull rod, stretch-draw connecting piece and hollow steel pipe, the inside internal thread that is provided with the step shaft form of stretch-draw connecting piece, stretch-draw pull rod outer wall bottom is provided with the external screw thread, stretch-draw pull rod and stretch-draw connecting piece threaded connection, hollow steel pipe outer wall and inner wall all are provided with the screw thread. The utility model discloses a squeeze into a steel nail and at the aluminium foil piece of its outer surface parcel one deck inside and outside surface sandblast at major diameter carbon fiber reinforced plastic cable tip center to increase its surface bond wrap-up force and frictional force. And expanded set cement mortar is poured between the steel sleeve and the large-diameter carbon fiber reinforced plastic cable to keep good adhesion between the steel pipe and the large-diameter carbon fiber reinforced plastic cable and ensure that the large-diameter carbon fiber reinforced plastic cable is not pulled out of the steel pipe to be adhered and damaged during tensioning.
Description
Technical Field
The utility model relates to a civil engineering technical field specifically is a major diameter prestressing force carbon fiber reinforced plastic cable ground tackle.
Background
The prestressed concrete structure is a structural form formed by taking concrete as a main body and configuring different forms of reinforcing steel bars and prestressed tendons, and is one of the most widely applied structural forms in the field of engineering construction in China. However, the concrete structure of the country of pre-application also has many problems during use, and the most prominent of them is the problem of durability. The traditional prestressed concrete structure is in an exposed environment for a long time, the high-strength prestressed steel bars are easy to corrode, and when a building is in an aggressive environment such as a harbor and a wharf, the corrosion problem of the prestressed steel bars is more serious. In recent years, a large number of engineering examples are available, which cause great reduction in the service performance and service life of buildings due to corrosion of prestressed reinforcements, and great economic loss is caused. In the last 30 years, research and engineering applications at home and abroad show that: the prestressed carbon fiber reinforced plastic Cable (CFRP) can well solve the problem of corrosion of prestressed tendons.
The FRP is suitable for being used as a prestressed tendon in a prestressed concrete structure because the FRP has the advantages of high tensile strength, good creep relaxation performance, good fatigue resistance and other excellent mechanical properties, low elastic modulus, strong corrosion resistance and the like. However, compared with steel, the transverse compressive strength and shear strength of FRP are lower, so that the FRP cannot be anchored by adopting a traditional anchoring mode, and aiming at the problem, special anchorage devices for FRP bars have been developed at home and abroad at present, and can prevent the FRP bars from being crushed transversely and damaged by shearing to a certain extent. However, these anchors are complicated in manufacturing process, require a long anchoring length, and are not suitable for large-diameter prestressed CFRP reinforcements, which results in limitations of application of the prestressed CFRP reinforcements in practical engineering.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a major diameter prestressing force carbon fiber reinforced plastic cable ground tackle.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a major diameter prestressing force carbon fiber reinforced plastic cable ground tackle, includes stretch-draw pull rod, stretch-draw connecting piece and hollow steel pipe, the inside internal thread that is provided with the step shaft form of stretch-draw connecting piece, stretch-draw pull rod outer wall bottom is provided with the external screw thread, stretch-draw pull rod and stretch-draw connecting piece threaded connection, hollow steel pipe outer wall and inner wall all are provided with the screw thread, hollow steel pipe both ends threaded connection has the pressurization plug and seals the plug respectively, the inside carbon fiber plastic cable that is provided with of hollow steel pipe, carbon fiber plastic cable top center embedding steel nail, it is provided with the quartzy mortar of inflation cement to fill between carbon fiber plastic cable and the hollow steel pipe inner wall, carbon fiber plastic cable bottom runs through the through-hole of sealing and seting up on the plug and extends to hollow steel.
Preferably, the outer wall of the aluminum foil is arranged by sand blasting.
Preferably, the outer wall of the hollow steel pipe is in threaded connection with a regular hexagon nut.
Preferably, the tension pull rod is made of high-strength steel.
Preferably, the distance between the inner wall of the hollow steel pipe and the outer wall of the carbon fiber plastic cable is 1-2 cm.
The utility model provides a major diameter prestressing force carbon fiber reinforced plastic cable ground tackle. The method has the following beneficial effects:
(1) the utility model discloses a squeeze into a steel nail and at the aluminium foil piece of its outer surface parcel one deck inside and outside surface sandblast at major diameter carbon fiber reinforced plastic cable tip center to increase its surface bond stress and frictional force. And expanded set cement mortar is poured between the steel sleeve and the large-diameter carbon fiber reinforced plastic cable to keep good adhesion between the steel pipe and the large-diameter carbon fiber reinforced plastic cable and ensure that the large-diameter carbon fiber reinforced plastic cable is not pulled out of the steel pipe to be adhered and damaged during tensioning.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the pressurizing plug of the present invention;
FIG. 3 is a schematic view of the structure of the sealing plug of the present invention;
fig. 4 is a cross-sectional view of the tension connector of the present invention.
In the figure: 1 pressurizing plug, 2 regular hexagon nuts, 3 hollow steel pipes, 4 aluminum foils, 5 steel nails, 6 carbon fiber plastic cables, 7 expanded cement mortar, 8 sealing plugs, 9 tensioning connectors and 10 tensioning pull rods.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-4, the utility model provides a technical solution: a large-diameter prestressed carbon fiber reinforced plastic cable anchorage device comprises a tension pull rod 10, a tension connecting piece 9 and a hollow steel pipe 3, wherein stepped shaft-shaped internal threads are arranged inside the tension connecting piece 9, external threads are arranged at the bottom of the outer wall of the tension pull rod 10, the tension pull rod 10 is made of high-strength steel, the tension pull rod 10 is in threaded connection with the tension connecting piece 9, threads are arranged on the outer wall and the inner wall of the hollow steel pipe 3, two ends of the hollow steel pipe 3 are respectively in threaded connection with a pressurizing plug 1 and a sealing plug 8, a carbon fiber plastic cable 6 is arranged inside the hollow steel pipe 3, the distance between the inner wall of the hollow steel pipe 3 and the outer wall of the carbon fiber plastic cable 6 is 1.5cm, a steel nail 5 is embedded in the center of the top end of the carbon fiber plastic cable 6 so as to increase the gripping force of the inner surface of the hollow steel pipe 3, so as to keep good adhesion between the hollow steel pipe 3 and the carbon fiber plastic cable 6 and ensure that the carbon fiber plastic cable 6 is not pulled out of the hollow steel pipe 3 to be adhered and damaged during tensioning. The bottom end of the carbon fiber plastic cable 6 penetrates through a through hole formed in the sealing plug 8 and extends to the lower portion of the hollow steel pipe 3, the outer wall of the carbon fiber plastic lock 6 is wrapped with an aluminum foil 4, the outer wall of the aluminum foil 4 is subjected to sand blasting, the surface friction force of the carbon fiber reinforced plastic cable 6 is increased, the outer wall of the hollow steel pipe 3 is in threaded connection with a regular hexagon nut 2, after the expansion set cement mortar 7 is filled, redundant air in the hollow steel pipe 3 is discharged through the through hole in the sealing plug 8 by screwing the pressurizing plug 1, after the operation is finished, one end of the anchorage device is placed into water and is heated and maintained for 48 hours and then taken out, and the other end is. And after maintenance is finished, tensioning equipment stretches the anchorage device through the tensioning connecting piece 9 and the tensioning pull rod 10. And after tensioning is finished, the steel wire is anchored by the regular hexagon nut 2.
In conclusion, the surface bond strength and friction force are increased by driving a steel nail into the center of the end part of the large-diameter carbon fiber reinforced plastic rope and wrapping the outer surface of the steel nail with a layer of aluminum foil with sand blasting on the inner surface and the outer surface. And expanded set cement mortar is poured between the steel sleeve and the large-diameter carbon fiber reinforced plastic cable to keep good adhesion between the steel pipe and the large-diameter carbon fiber reinforced plastic cable and ensure that the large-diameter carbon fiber reinforced plastic cable is not pulled out of the steel pipe to be adhered and damaged during tensioning.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a major diameter prestressing force carbon fiber reinforced plastic cable ground tackle, includes stretch-draw pull rod (10), stretch-draw connecting piece (9) and hollow steel pipe (3), its characterized in that: a stepped shaft-shaped internal thread is arranged inside the tensioning connecting piece (9), an external thread is arranged at the bottom of the outer wall of the tensioning pull rod (10), the tensioning pull rod (10) is in threaded connection with the tensioning connecting piece (9), the outer wall and the inner wall of the hollow steel pipe (3) are both provided with threads, the two ends of the hollow steel pipe (3) are respectively connected with a pressurizing plug (1) and a sealing plug (8) in a threaded manner, a carbon fiber plastic cable (6) is arranged inside the hollow steel pipe (3), a steel nail (5) is embedded in the center of the top end of the carbon fiber plastic cable (6), expanded cement quartz mortar (7) is filled between the carbon fiber plastic cable (6) and the inner wall of the hollow steel pipe (3), the bottom end of the carbon fiber plastic cable (6) penetrates through a through hole formed in the sealing plug (8) and extends to the position below the hollow steel pipe (3), and the outer wall of the carbon fiber plastic cable (6) is wrapped with an aluminum foil (4).
2. The large-diameter prestressed carbon fiber reinforced plastic cable anchor according to claim 1, wherein: the outer wall of the aluminum foil (4) is subjected to sand blasting.
3. The large-diameter prestressed carbon fiber reinforced plastic cable anchor according to claim 1, wherein: the outer wall of the hollow steel pipe (3) is in threaded connection with a regular hexagon nut (2).
4. The large-diameter prestressed carbon fiber reinforced plastic cable anchor according to claim 1, wherein: the tensioning pull rod (10) is made of high-strength steel.
5. The large-diameter prestressed carbon fiber reinforced plastic cable anchor according to claim 1, wherein: the distance between the inner wall of the hollow steel pipe (3) and the outer wall of the carbon fiber plastic cable (6) is 1-2 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020975704.1U CN212743146U (en) | 2020-06-02 | 2020-06-02 | Large-diameter prestressed carbon fiber reinforced plastic cable anchorage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020975704.1U CN212743146U (en) | 2020-06-02 | 2020-06-02 | Large-diameter prestressed carbon fiber reinforced plastic cable anchorage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212743146U true CN212743146U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020975704.1U Expired - Fee Related CN212743146U (en) | 2020-06-02 | 2020-06-02 | Large-diameter prestressed carbon fiber reinforced plastic cable anchorage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212743146U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352058A (en) * | 2021-12-30 | 2022-04-15 | 华润水泥(南宁)有限公司 | Building structure reinforced cement rope and reinforcing construction method thereof |
| CN115370073A (en) * | 2022-08-15 | 2022-11-22 | 中国建筑第八工程局有限公司 | Clamping piece-bonding combined type anchorage device for anchoring carbon fiber bars |
-
2020
- 2020-06-02 CN CN202020975704.1U patent/CN212743146U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352058A (en) * | 2021-12-30 | 2022-04-15 | 华润水泥(南宁)有限公司 | Building structure reinforced cement rope and reinforcing construction method thereof |
| CN115370073A (en) * | 2022-08-15 | 2022-11-22 | 中国建筑第八工程局有限公司 | Clamping piece-bonding combined type anchorage device for anchoring carbon fiber bars |
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| 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: 20210319 |
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| CF01 | Termination of patent right due to non-payment of annual fee |