CN114045743B - Carbon fiber prestress tendon T-shaped beam and preparation method thereof - Google Patents
Carbon fiber prestress tendon T-shaped beam and preparation method thereof Download PDFInfo
- Publication number
- CN114045743B CN114045743B CN202111374042.8A CN202111374042A CN114045743B CN 114045743 B CN114045743 B CN 114045743B CN 202111374042 A CN202111374042 A CN 202111374042A CN 114045743 B CN114045743 B CN 114045743B
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- carbon fiber
- tendon
- prestress
- tendons
- shaped beam
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Links
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 105
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 105
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 210000002435 tendon Anatomy 0.000 title claims abstract description 91
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 230000002787 reinforcement Effects 0.000 claims abstract description 46
- 238000003825 pressing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 11
- 238000010276 construction Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
- E01D2101/285—Composite prestressed concrete-metal
Abstract
The invention discloses a carbon fiber prestressed tendon T-shaped beam and a preparation method thereof, wherein the T-shaped beam comprises the following components: t beam reinforcement cage; the carbon fiber prestress tendons penetrate through the web steel reinforcement framework; and concrete is coated on the web steel reinforcement framework and the carbon fiber prestress tendons. The invention solves the problem that the durability and other performances of the traditional steel strand prestress T-shaped beam can not meet the long service life requirement of the bridge.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a carbon fiber prestressed tendon T-shaped beam and a preparation method thereof.
Background
The T-shaped beam of the reinforced concrete structure is divided into a precast beam and a cast-in-situ beam. The existing prestress T-shaped beam generally adopts steel strands as prestress tendons to apply prestress to the T-shaped beam. The durability and other performances of the traditional steel strand prestress T-shaped beam can not meet the requirement of long service life.
Disclosure of Invention
In order to overcome the defects existing in the prior art, the invention provides a carbon fiber prestressed tendon T-shaped beam and a preparation method thereof, so as to solve the problem that the durability and other performances of the traditional steel strand prestressed T-shaped beam cannot meet the requirements of long service life of a bridge.
In order to achieve the above purpose, the preparation method of the carbon fiber prestress tendon T-beam comprises the following steps:
respectively installing anchors at two ends of the carbon fiber prestress tendons;
stretching and straightening the carbon fiber prestress tendons provided with the anchors;
lifting the straightened carbon fiber prestress tendons to the upper part of a platform integrally, and suspending and erecting the two ends of the carbon fiber prestress tendons on the platform through temporary supports;
binding a web steel reinforcement cage of the T-shaped beam on the platform, so that the carbon fiber prestress rib bundles penetrate through the web steel reinforcement cage, and tying the middle parts of the carbon fiber prestress rib bundles to the bottom of the web steel reinforcement cage through a lower pressing frame;
after the web reinforcement cage is bound, fixing the carbon fiber prestress tendons on the web reinforcement cage;
and after the temporary support is removed, installing a T-shaped beam template and pouring the T-shaped beam.
Further, the step of stretching and straightening the carbon fiber prestressed tendons provided with the anchorage device comprises the following steps:
respectively installing tensioning tools on anchors at two ends of the carbon fiber prestressed tendon;
two ends of the carbon fiber prestress tendon are respectively provided with a winch, and a steel wire rope of the winch is connected with the tensioning tool;
and starting the winch to rewind the steel wire rope, so that the carbon fiber prestress tendon is tensioned.
Further, the temporary support includes:
the two upright posts are oppositely arranged and are vertically arranged at the end parts of the platform;
the cross beams are connected between the two upright posts, and the cross beams are arranged at intervals along the height direction of the upright posts;
and the locking ring is arranged on the cross beam, and the anchor is detachably penetrated in the locking ring.
Further, the pressing frame includes:
the web steel reinforcement cage comprises a plurality of longitudinal main reinforcements arranged in the same direction and a plurality of stirrups hooped on the longitudinal main reinforcements, wherein the stirrups are arranged at intervals along the length direction of the longitudinal main reinforcements, the longitudinal main reinforcements and the carbon fiber prestress tendons are arranged in the same direction, the pressure-bearing base is arranged on the inner side of the stirrups, and the pressure-bearing base is arranged between the bottom reinforcement sections of two adjacent stirrups and the longitudinal main reinforcements in a cushioning manner; and
and the pressing rod stretches over the carbon fiber prestress tendon and presses against the upper part of the carbon fiber prestress tendon, and two ends of the pressing rod are connected with the pressure-bearing base through the drawknot rods respectively.
Further, the pressure-bearing base includes:
two first cross bars, wherein two ends of each first cross bar are respectively placed at the bottom rib sections of two adjacent stirrups, and the two cross bars are arranged at two opposite ends of the bottom rib sections; and
the second cross bars are connected between the two first cross bars and are supported at the bottoms of the longitudinal main ribs.
Further, the carbon fiber prestress rib bundles comprise carbon fiber rib bundles and corrugated pipes sleeved outside the carbon fiber rib bundles.
The invention provides a carbon fiber prestress tendon T-shaped beam, which is characterized by comprising the following components:
web steel reinforcement cage;
the carbon fiber prestress tendons penetrate through the web steel reinforcement cage; and
and the concrete is coated on the web steel reinforcement cage and the carbon fiber prestress tendons.
The carbon fiber prestress tendon T-shaped beam and the preparation method thereof have the beneficial effects that the construction quality of the T-shaped beam is ensured, and meanwhile, the advantages of carbon fibers are ensured to be fully exerted. The carbon fiber is a light high-strength corrosion-resistant and fatigue-resistant material, and can solve the problems of easy corrosion and easy fatigue of steel. The carbon fiber prestress tendons are formed by assembling a plurality of carbon fiber tendons with an anchor in a factory in advance, are used in a full concrete structure, replace steel strands and are tensioned to apply prestress to a concrete member. According to the carbon fiber prestress tendon T-shaped beam and the preparation method thereof, the carbon fiber tendon is used for replacing a steel strand in the prestress concrete bridge, so that the service life of the steel bridge can be obviously prolonged, and the construction quality can be improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
FIG. 1 is a schematic diagram of a carbon fiber tendon T-beam in accordance with an embodiment of the present invention.
Fig. 2 is a schematic structural view of a temporary support according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a locking ring according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a pressing frame according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a tensioning tool according to an embodiment of the present invention.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 to 5, the present invention provides a carbon fiber tendon T-beam, comprising: web steel reinforcement cage, carbon fiber prestressing tendons 1 and concrete. The carbon fiber prestress tendons 1 are arranged in the web steel reinforcement cage in a penetrating mode. The concrete is coated on the web steel reinforcement cage and the carbon fiber prestress tendons 1.
Wherein, the web steel reinforcement cage includes many vertical main muscle 4 and multichannel stirrup 5. Specifically, a plurality of longitudinal main ribs 4 are arranged in the same direction. The multi-channel stirrup 5 is hooped outside the plurality of longitudinal main ribs 4. The plurality of stirrups 5 are arranged at intervals along the length direction of the longitudinal main reinforcement 4. The longitudinal main tendons 4 and the carbon fiber prestress tendons 1 are arranged in the same direction.
The carbon fiber prestress tendon 1 comprises a carbon fiber tendon 11 and a corrugated pipe 12 sleeved outside the carbon fiber tendon.
The carbon fiber prestress tendon T-shaped beam utilizes the carbon fiber prestress tendon to replace the steel strand of the traditional T-shaped beam.
The invention provides a preparation method of a carbon fiber prestressed tendon 1T-shaped beam, which comprises the following steps:
s1: and the two ends of the carbon fiber prestress tendons 1 are respectively provided with an anchor 2.
S2: and tensioning and straightening the carbon fiber prestressed tendons 1 provided with the anchorage devices 2.
Specifically, step S2 includes:
s21, respectively installing tensioning tools 8 on the anchors 2 at the two ends of the carbon fiber prestressed tendon 1.
As described with reference to fig. 5, a pull ring is formed at the top of the tensioning tool, a collar is formed at the bottom of the tensioning tool, and the collar is detachably sleeved outside the anchor.
S22, arranging windlass at two ends of the carbon fiber prestress tendon 1 respectively, and connecting a steel wire rope of the windlass with a tensioning tool.
One end of a steel wire rope of the winch is wound on a roller of the winch, the other end of the steel wire rope is connected with a drag hook, and the drag hook is hooked on a pull ring at the top of the tensioning tool 8.
S23, starting a winch to rewind the steel wire rope, so that the carbon fiber prestress tendon 1 is tightened.
The two windlass reversely pull the pull rings of the tensioning tool on the anchors at the two ends of the carbon fiber prestressed tendon through the steel wire rope, so that the carbon fiber prestressed tendon 1 is tensioned and straightened.
And after the carbon fiber prestress tendons are tensioned and straightened, removing the tensioning tool.
S3: and lifting the straightened carbon fiber prestress tendons 1 to the upper part of a platform 7 integrally, and suspending the two ends of the carbon fiber prestress tendons 1 on the platform 7 through temporary supports 3.
The platform is used for pouring the T-shaped beam. After the carbon fiber prestress tendons are straightened, the carbon fiber prestress tendons 1 are integrally lifted to the upper part of a platform 7, and temporary supports are respectively arranged at two ends of the platform.
Referring to fig. 2 and 3, the temporary support 3 includes: two uprights 31 and a plurality of cross members 32. The two columns 31 are disposed opposite to each other. The upright posts 31 are erected at the ends of the platform 7. Each beam 32 is connected between two uprights 31. The plurality of cross members 32 are arranged at intervals in the height direction of the upright 31. A locking ring 33 is mounted on the cross beam 32. The anchor 2 is detachably threaded into the locking ring 33.
The carbon fiber prestress tendons are suspended above the platform through temporary supports at two ends of the platform.
S4: the web steel reinforcement cage of the T-shaped beam is bound on the platform 7, so that the carbon fiber prestress rib bundles 1 penetrate through the web steel reinforcement cage, and the middle parts of the carbon fiber prestress rib bundles 1 are tied at the bottom of the web steel reinforcement cage through the pressing frame.
And after the carbon fiber prestress tendons are suspended above the platform, binding web reinforcement cages of the T-shaped beams. In the process of binding the web reinforcement cage, a lower pressing frame is arranged in the web reinforcement cage, and the middle part of the carbon fiber prestress tendon of the lower pressing frame is installed with a preset fold line angle to be pressed down.
Specifically, the pressing frame 6 includes: a pressure-bearing base 61 and a pressure-bearing rod 62.
Wherein the pressure-bearing base 61 is arranged inside the stirrup 5. The bearing base 61 is arranged between the bottom bar sections of the two adjacent stirrups 5 and the longitudinal main bars 4. The pressing rod 62 is arranged above the carbon fiber tendon 1 in a crossing manner, and the pressing rod 62 presses against the upper part of the carbon fiber tendon 1. Both ends of the pressing rod 62 are connected to the pressure-bearing base 61 through tie rods 621, respectively.
As a preferred embodiment, the pressure-bearing base 61 includes: two first rails 611 and a second rail 612. The two ends of the first cross bar 611 rest on the bottom bar sections of the two adjacent stirrups 5 respectively. The two cross bars are arranged at the opposite ends of the bottom rib section. The second cross bar 612 is connected between the two first cross bars 611 and is supported at the bottoms of the plurality of longitudinal main bars 4.
The height of the lower pressing frame meets the linear requirement of the carbon fiber prestress tendon, and the carbon fiber prestress tendon is suspended and fixed.
The dead weight of the plurality of longitudinal main tendons is utilized to press down the carbon fiber prestress tendons, so that the carbon fiber prestress tendons are arranged in the web steel reinforcement cage according to a preset path, and the linearity of the carbon fiber prestress tendons is guaranteed to meet design requirements.
S5: after the web reinforcement cage is bound, the carbon fiber prestress tendons 1 are fixedly arranged on the web reinforcement cage.
After the web steel reinforcement cage is bound, the carbon fiber prestress tendons are fixed by welding thin steel bars on stirrups, one thin steel bar is arranged on each 0.8m of the straight line section of the carbon fiber prestress tendons, and one thin steel bar is arranged on each 0.4m of the curve section of the carbon fiber prestress tendons.
S6: and after the temporary support 3 is removed, installing a T-beam template and pouring the T-beam.
After the carbon fiber prestress tendons are fixed, the temporary support is disassembled, and templates and other matched equipment of the T-shaped beam are installed. And installing a flange reinforcement cage of the T-shaped beam and a template thereof. And finally, pouring concrete, curing, removing the mould and stretching the carbon fiber prestressed tendons.
The prestressed carbon fiber technology belongs to a novel structural material, and is rarely applied to new buildings although the prestressed carbon fiber technology is used for reinforcing and repairing the existing structure.
According to the carbon fiber prestress tendon T-shaped beam and the preparation method thereof, the construction quality of the T-shaped beam is ensured, and meanwhile, the advantages of carbon fibers are ensured to be fully exerted. The carbon fiber is a light high-strength corrosion-resistant and fatigue-resistant material, and can solve the problems of easy corrosion and easy fatigue of steel. The carbon fiber prestress tendons are formed by assembling a plurality of carbon fiber tendons with an anchor in a factory in advance, are used in a full concrete structure, replace steel strands and are tensioned to apply prestress to a concrete member. According to the carbon fiber prestress tendon T-shaped beam and the preparation method thereof, the carbon fiber tendon is used for replacing a steel strand in the prestress concrete bridge, so that the service life of the steel bridge can be obviously prolonged, and the local construction quality can be improved.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (3)
1. The preparation method of the carbon fiber prestress tendon T-shaped beam is characterized by comprising the following steps of:
respectively installing anchors at two ends of the carbon fiber prestress tendons;
stretching and straightening the carbon fiber prestress tendons provided with the anchors;
lifting the straightened carbon fiber prestress tendons to the upper part of a platform integrally, and suspending and erecting the two ends of the carbon fiber prestress tendons on the platform through temporary supports;
binding a web steel reinforcement cage of the T-shaped beam on the platform, so that the carbon fiber prestress rib bundles penetrate through the web steel reinforcement cage, and tying the middle parts of the carbon fiber prestress rib bundles to the bottom of the web steel reinforcement cage through a lower pressing frame;
after the web reinforcement cage is bound, fixing the carbon fiber prestress tendons on the web reinforcement cage;
after the temporary support is removed, installing a T-shaped beam template and pouring the T-shaped beam;
the temporary support includes: the two upright posts are oppositely arranged and are vertically arranged at the end parts of the platform; the cross beams are connected between the two upright posts, and the cross beams are arranged at intervals along the height direction of the upright posts; the locking ring is arranged on the cross beam, and the anchor is detachably penetrated in the locking ring;
the hold-down frame includes: the web steel reinforcement cage comprises a plurality of longitudinal main reinforcements arranged in the same direction and a plurality of stirrups hooped on the longitudinal main reinforcements, wherein the stirrups are arranged at intervals along the length direction of the longitudinal main reinforcements, the longitudinal main reinforcements and the carbon fiber prestress tendons are arranged in the same direction, the pressure-bearing base is arranged on the inner side of the stirrups, and the pressure-bearing base is arranged between the bottom reinforcement sections of two adjacent stirrups and the longitudinal main reinforcements in a cushioning manner; the pressing rod stretches over the carbon fiber prestress rib bundles and presses against the upper parts of the carbon fiber prestress rib bundles, and two ends of the pressing rod are connected with the pressure-bearing base through tie rods respectively;
the pressure-bearing base includes: two first cross bars, wherein two ends of each first cross bar are respectively placed at the bottom rib sections of two adjacent stirrups, and the two cross bars are arranged at two opposite ends of the bottom rib sections; and the second cross bars are connected between the two first cross bars and are supported at the bottoms of the longitudinal main ribs.
2. The method of making a carbon fiber tendon T-beam according to claim 1, wherein the step of tensioning and straightening the carbon fiber tendon with the anchor installed includes:
respectively installing tensioning tools on anchors at two ends of the carbon fiber prestressed tendon;
two ends of the carbon fiber prestress tendon are respectively provided with a winch, and a steel wire rope of the winch is connected with the tensioning tool;
and starting the winch to rewind the steel wire rope, so that the carbon fiber prestress tendon is tensioned.
3. The method of claim 1, wherein the carbon fiber tendon comprises a carbon fiber tendon and a bellows sleeved outside the carbon fiber tendon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111374042.8A CN114045743B (en) | 2021-11-19 | 2021-11-19 | Carbon fiber prestress tendon T-shaped beam and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111374042.8A CN114045743B (en) | 2021-11-19 | 2021-11-19 | Carbon fiber prestress tendon T-shaped beam and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114045743A CN114045743A (en) | 2022-02-15 |
| CN114045743B true CN114045743B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111374042.8A Active CN114045743B (en) | 2021-11-19 | 2021-11-19 | Carbon fiber prestress tendon T-shaped beam and preparation method thereof |
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| CN108842591A (en) * | 2018-06-29 | 2018-11-20 | 东南大学 | Configure the precast segment T beam bridge construction and construction method of internal external pre-stress bundle |
| CN111890549A (en) * | 2020-07-16 | 2020-11-06 | 河北建设集团股份有限公司 | Rack for binding prefabricated box girder bottom plate web steel reinforcement frameworks |
| CN112832512A (en) * | 2021-01-07 | 2021-05-25 | 中铁三局集团建筑安装工程有限公司 | Large-span slow-bonding prestressed reinforced concrete beam and construction method |
-
2021
- 2021-11-19 CN CN202111374042.8A patent/CN114045743B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040058542A (en) * | 2002-12-27 | 2004-07-05 | 노윤근 | Prestressed steel reinforced concrete beam and manufacturing method thereof |
| CN202247719U (en) * | 2011-08-31 | 2012-05-30 | 衡水长江预应力有限公司 | Corresponding corrugated pre-stressed anti-sedimentation culvert pipe for bridge |
| CN202596028U (en) * | 2012-03-19 | 2012-12-12 | 河南理工大学 | Carbon fiber pres-stressed reinforcing steel and high strength steel bar ultra-high toughness fiber reinforced cement-based composite beam structure |
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| CN114045743A (en) | 2022-02-15 |
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