CN107724258B - Prestressing force carbon fiber stretching device - Google Patents
Prestressing force carbon fiber stretching device Download PDFInfo
- Publication number
- CN107724258B CN107724258B CN201711174409.5A CN201711174409A CN107724258B CN 107724258 B CN107724258 B CN 107724258B CN 201711174409 A CN201711174409 A CN 201711174409A CN 107724258 B CN107724258 B CN 107724258B
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- Prior art keywords
- tensioning
- fixed
- screw rod
- anchor block
- base
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 30
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 30
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 230000000149 penetrating effect Effects 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims description 5
- 239000004567 concrete Substances 0.000 abstract description 13
- 238000009434 installation Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling 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
- E01D2101/266—Concrete reinforced with fibres other than steel or glass
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a prestress carbon fiber tensioning device which comprises a fixed end base, fixed end anchor blocks, a carbon fiber tensioning cable, a tensioning end anchor block and a tensioning end base, wherein the fixed end anchor blocks and the tensioning end anchor blocks are cylindrical and are respectively fixed at two ends of the tensioning cable; the tensioning end anchor block is connected with one end of a tensioning screw rod, and the other end of the tensioning screw rod penetrates through a tensioning end penetrating hole in the tensioning end base and then is connected to the jack. By adopting the technical scheme, the prestressed carbon fiber tensioning device has the advantages that the area of the groove formed in the concrete is smaller, the depth is shallower, the structural strength of the bridge deck concrete is less damaged, and the integral structural strength of the bridge is maintained as much as possible.
Description
Technical Field
The invention relates to a prestressed carbon fiber tensioning device, and belongs to the technical field of bridge concrete prestressed tensioning devices.
Background
At present, a prestressed reinforced concrete structure is mostly adopted in a bridge, a prestressed tension cable used in a bridge concrete structure reinforcement project is usually a rectangular thin plate (strip or belt) with the width of 100mm, 50mm or 20mm and the thickness of 1 mm-3 mm, and a pretensioning method or a post-tensioning method is conventionally used for applying the prestressed tension to the bridge. Because the rectangular carbon fiber sheet is easy to crack due to uneven stress when tension is applied, the reliability and the safety are poor when the two modes are implemented, the tension control stress can only exert 40-50% of the standard value of the material, the high-strength characteristic of the carbon fiber is not effectively exerted, and the efficiency of reinforcing and reinforcing the structure is low. After the tensile force is applied to the carbon fiber plate in the prior art, the carbon fiber plate and the concrete structural layer are bonded by adopting epoxy structural adhesive with the filling thickness of 10-60 mm (the two ends of the span thickness are thin), and the thick adhesive layer is not only unfavorable for structural stress transmission due to low elastic modulus of the epoxy structural adhesive, but also has high cost of the epoxy structural adhesive auxiliary material, is far higher than that of the carbon fiber main material, and seriously influences the popularization and application of the reinforcing technology due to the defect of poor cost performance. To this situation, a solution is proposed by those skilled in the art, namely, directly erect stiff end and stretch-draw end under the bridge to pull the carbon fiber sheet to be closely attached to the bridge deck, so that a groove for installing the stiff end base, the stretch-draw end base and the jack needs to be formed in the concrete lower end surface of the bridge deck, the grooving is more, and as the square stiff end base and the stretch-draw end base are also provided with the sliding groove, the sliding groove is internally provided with the anchor block capable of sliding in the sliding groove, the stretch-draw rope is fixedly installed on the anchor block, so that the area of the base is larger, the area of the formed groove is larger, the whole structural strength of the bridge is not easy to maintain, in addition, the installation accuracy requirement is higher in practical construction, the installation position error of the stiff end base and the stretch-draw end base easily causes the inconsistent direction of the stretch-draw force of the jack with the extending direction of the carbon fiber sheet, the carbon fiber sheet is damaged, and the structural strength is affected.
Disclosure of Invention
Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a prestressed carbon fiber tensioning device capable of reducing the area and depth of a groove formed in the surface of a concrete structure layer so as to maintain the structural strength of the entire bridge as much as possible.
In order to achieve the above purpose, the prestress carbon fiber tensioning device comprises a fixed end base, fixed end anchor blocks, a carbon fiber tensioning cable, tensioning end anchor blocks and a tensioning end base, wherein the fixed end anchor blocks and the tensioning end anchor blocks are cylindrical and are respectively fixed at two ends of the tensioning cable; the fixed end anchor block is connected with one end of a fixed screw rod, and the other end of the fixed screw rod penetrates through a fixed end penetrating hole penetrating through the fixed end base and then is connected with a fixed nut in a threaded manner; the tensioning end anchor block is connected with one end of a tensioning screw rod, and the other end of the tensioning screw rod penetrates through a tensioning end penetrating hole on the tensioning end base and then is connected to the jack; a concave cavity is formed in the stretching end base, and the stretching screw rod penetrates through the concave cavity; the cavity is internally provided with a counterforce nut which can synchronously move along with the tensioning screw rod in the cavity when the jack pulls the tensioning screw rod and is used for being screwed to the side wall position of the cavity, which is close to one side of the tensioning end anchor block, so as to prevent the tensioning cable from shrinking; and the tensioning end base and the fixed end base are respectively provided with a plurality of through holes for fixing the tensioning end base and the fixed end base on a construction station through fixing bolts.
The concave cavity is arranged on one side face of the stretching end base and is positioned in the middle of the side face, and the stretching end penetrating hole is parallel to the side face.
A plurality of through holes formed in the tensioning end base are uniformly distributed on two sides of the tensioning screw; a plurality of through holes formed in the fixed end base are uniformly distributed on two sides of the fixed screw.
The through holes are long holes.
The fixed end anchor block is connected with the fixed screw rod through a fixed end sleeve, one end of the fixed end sleeve is connected with the fixed end anchor block in a threaded manner, and the other end of the fixed end sleeve is connected with the fixed screw rod in a threaded manner.
The tensioning end anchor block is connected with the tensioning screw rod through a tensioning end sleeve, one end of the tensioning end sleeve is connected with the tensioning end anchor block in a threaded mode, and the other end of the tensioning end sleeve is connected with the tensioning screw rod in a threaded mode.
The end part of the tension cable stretches into the fixed end clamping cavity of the coaxial line arranged on the fixed end anchor block and is clamped and fixed by the two fixed end clamping pieces.
The end part of the tension cable stretches into a coaxial tension end clamping cavity formed in the tension end anchor block and is clamped and fixed by two tension end clamping pieces.
The jack is a through jack, the tensioning screw rod passes through a through hole on the axis of the jack and then is connected with the tensioning nut in a threaded mode, and the tensioning nut is used for pushing the jack when the jack stretches so as to drive the tensioning screw rod to move.
By adopting the technical scheme, the prestressed carbon fiber tensioning device has the advantages that the fixed end base is separated from the cylindrical fixed end anchor block, and the tensioning end base is separated from the cylindrical tensioning end anchor block, so that the fixed end anchor block and the tensioning end anchor block are not required to be left on the fixed end base and the tensioning end base, and compared with the traditional tensioning device, the areas of the fixed end base and the tensioning end base are much smaller, so that the area of a groove formed in concrete is smaller, the depth is shallower, and the structural strength of bridge floor concrete is less damaged; simultaneously stretch-draw screw rod and fixing screw rod wear out the hole and stretch-draw end wear out the hole in clearance fit respectively, and the angle can receive the tension effect self-adjustment when stretching, still can guarantee stiff end anchor block, stretch-draw end anchor block, fixed end sleeve, stretch-draw end sleeve coaxial line when appearing the installation accuracy error to can avoid causing the damage to the carbon fiber sheet in stretch-draw process as far as possible.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in the figure, the embodiment provides a prestressed carbon fiber tensioning device, which comprises a fixed end base 11, a fixed end anchor block 12, a carbon fiber tensioning cable 3, a tensioning end anchor block 22 and a tensioning end base 21, wherein the fixed end anchor block 12 and the tensioning end anchor block 22 are cylindrical and are respectively fixed at two ends of the tensioning cable 3; the fixed end anchor block 12 is connected with one end of a fixed screw rod 13, and the other end of the fixed screw rod 13 passes through a fixed end penetrating hole 110 penetrating through the fixed end base 11 and is then screwed with a fixed nut 140; the stretching end anchor block 22 is connected with one end of a stretching screw 23, and the other end of the stretching screw 23 penetrates through a stretching end penetrating hole 210 on the stretching end base 21 and then is connected to the jack 4; a concave cavity 211 is formed in the stretching end base 21, and the stretching screw 23 penetrates through the concave cavity 211; a counter-force nut 240 is arranged in the cavity 211, the counter-force nut 240 can synchronously move along with the tensioning screw 23 in the cavity 211 when the tensioning screw 23 is pulled by the jack 4, and is used for being screwed to the side wall position of the cavity 211, which is close to the tensioning end anchor block 22, so as to prevent the tensioning cable 3 from shrinking when the jack 4 releases the stroke and after tensioning operation is finished; a plurality of through holes 100 are respectively formed in the tensioning end base 21 and the fixing end base 11 for fixing the tensioning end base 21 and the fixing end base 11 to a construction station, that is, a surface of a concrete structure layer, through fixing bolts (not shown), the fixing bolts are vertically fixed to the surface of the concrete structure layer during construction, then the through holes 100 of the tensioning end base 21 or the fixing end base 11 penetrate through the fixing bolts, and then the fixing bolt nuts 200 are screwed on the fixing bolts.
The cavity 211 is formed on one side surface 21a of the tensioning end base 21 and is located in the middle of the side surface 21a, and the tensioning end penetrating hole 210 is parallel to the side surface 21 a.
A plurality of through holes 100 formed in the tensioning end base 21 are uniformly distributed on two sides of the tensioning screw 23; a plurality of through holes 100 formed in the fixed end base 11 are uniformly distributed on two sides of the fixed screw 13.
The through hole 100 is a long hole for error adjustment.
The fixed end anchor block 12 is connected with the fixed screw 13 through a fixed end sleeve 14, one end of the fixed end sleeve 14 is in threaded connection with the fixed end anchor block 12, and the other end is in threaded connection with the fixed screw 13.
The tensioning end anchor block 22 is connected with the tensioning screw 23 through a tensioning end sleeve 24, one end of the tensioning end sleeve 24 is in threaded connection with the tensioning end anchor block 22, and the other end of the tensioning end sleeve is in threaded connection with the tensioning screw 23.
The end part of the tensioning cable 3 extends into a coaxial fixed end clamping cavity 120 formed on the fixed end anchor block 12 and is clamped and fixed by two fixed end clamping pieces 15; the end of the tensioning cable 3 extends into a coaxial tensioning end clamping cavity 220 formed in the tensioning end anchor block 22 and is clamped and fixed by two tensioning end clamping pieces 25.
The jack 4 is a through jack, the tensioning screw 23 passes through a through hole 41 on the axis of the jack 4 and then is connected with the tensioning nut 42 in a threaded manner, and the tensioning nut 42 is used for pushing the jack 4 when the jack 4 stretches so as to drive the tensioning screw 23 to move.
By adopting the technical scheme, the prestressed carbon fiber tensioning device has the advantages that the fixed end base is separated from the cylindrical fixed end anchor block, and the tensioning end base is separated from the cylindrical tensioning end anchor block, so that the fixed end anchor block and the tensioning end anchor block are not required to be left on the fixed end base and the tensioning end base, and compared with the traditional tensioning device, the areas of the fixed end base and the tensioning end base are much smaller, so that the area of a groove formed in concrete is smaller, the depth is shallower, and the structural strength of bridge floor concrete is less damaged; simultaneously stretch-draw screw rod and fixing screw rod wear out the hole and stretch-draw end wear out the hole in clearance fit respectively, and the angle can receive the tension effect self-adjustment when stretching, still can guarantee stiff end anchor block, stretch-draw end anchor block, fixed end sleeve, stretch-draw end sleeve coaxial line when appearing the installation accuracy error to can avoid causing the damage to the carbon fiber sheet in stretch-draw process as far as possible.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (6)
1. The utility model provides a prestressing force carbon fiber tensioning equipment which characterized in that: the device comprises a fixed end base, fixed end anchor blocks, a tensile cable of carbon fibers, a tensile end anchor block and a tensile end base, wherein the fixed end anchor blocks and the tensile end anchor blocks are cylindrical and are respectively fixed at two ends of the tensile cable; the fixed end anchor block is connected with one end of a fixed screw rod, and the other end of the fixed screw rod penetrates through a fixed end penetrating hole penetrating through the fixed end base and then is connected with a fixed nut in a threaded manner; the tensioning end anchor block is connected with one end of a tensioning screw rod, and the other end of the tensioning screw rod penetrates through a tensioning end penetrating hole on the tensioning end base and then is connected to the jack; a concave cavity is formed in the stretching end base, and the stretching screw rod penetrates through the concave cavity; the cavity is internally provided with a counterforce nut which can synchronously move along with the tensioning screw rod in the cavity when the jack pulls the tensioning screw rod and is used for being screwed to the side wall position of the cavity, which is close to one side of the tensioning end anchor block, so as to prevent the tensioning cable from shrinking; the tensioning end base and the fixed end base are respectively provided with a plurality of through holes for fixing the tensioning end base and the fixed end base on a construction station through fixing bolts; the concave cavity is formed in one side face of the stretching end base and is positioned in the middle of the side face, and the stretching end penetrating hole is parallel to the side face; a plurality of through holes formed in the tensioning end base are uniformly distributed on two sides of the tensioning screw; a plurality of through holes formed in the fixed end base are uniformly distributed on two sides of the fixed screw; the fixed end anchor block is connected with the fixed screw rod through a fixed end sleeve, one end of the fixed end sleeve is connected with the fixed end anchor block in a threaded manner, and the other end of the fixed end sleeve is connected with the fixed screw rod in a threaded manner.
2. The prestressed carbon fiber tensioning apparatus of claim 1, wherein: the through holes are long holes.
3. The prestressed carbon fiber tensioning apparatus of any of claims 1-2, wherein: the tensioning end anchor block is connected with the tensioning screw rod through a tensioning end sleeve, one end of the tensioning end sleeve is connected with the tensioning end anchor block in a threaded mode, and the other end of the tensioning end sleeve is connected with the tensioning screw rod in a threaded mode.
4. The prestressed carbon fiber tensioning apparatus of any of claims 1-2, wherein: the end part of the tension cable stretches into a coaxial clamping cavity formed in the fixed end anchor block and is clamped and fixed by the two fixed end clamping pieces.
5. The prestressed carbon fiber tensioning apparatus of any of claims 1-2, wherein: the end part of the tension cable stretches into a coaxial clamping cavity formed in the tension end anchor block and is clamped and fixed by the two tension end clamping pieces.
6. The prestressed carbon fiber tensioning apparatus of any of claims 1-2, wherein: the jack is a through jack, the tensioning screw rod passes through a through hole on the axis of the jack and then is connected with the tensioning nut in a threaded mode, and the tensioning nut is used for pushing the jack when the jack stretches so as to drive the tensioning screw rod to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711174409.5A CN107724258B (en) | 2017-11-22 | 2017-11-22 | Prestressing force carbon fiber stretching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711174409.5A CN107724258B (en) | 2017-11-22 | 2017-11-22 | Prestressing force carbon fiber stretching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107724258A CN107724258A (en) | 2018-02-23 |
| CN107724258B true CN107724258B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711174409.5A Active CN107724258B (en) | 2017-11-22 | 2017-11-22 | Prestressing force carbon fiber stretching device |
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| CN (1) | CN107724258B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425325A (en) * | 2018-04-04 | 2018-08-21 | 刘慧锦 | A kind of highway bridge prestress strengthening method |
| CN108908694B (en) * | 2018-06-29 | 2023-09-01 | 周兆弟 | Steel bar prestress tensioning machine |
| CN109026059A (en) * | 2018-07-25 | 2018-12-18 | 同济大学 | A kind of fixed end, pretightning force applying method and ring plate model |
| CN111188286B (en) * | 2020-01-13 | 2021-04-30 | 上海悍马建筑科技有限公司 | Method for disassembling bonded prestressed carbon fiber plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060126200A (en) * | 2005-06-03 | 2006-12-07 | 주식회사 엠텍 | Fiber composite panel with tension head and concrete twofold strengthening method by post-tensioning using it |
| CN106049300A (en) * | 2016-08-03 | 2016-10-26 | 深圳市威士邦建筑新材料科技有限公司 | Pull-type prestress carbon fiber bar tension device and construction method |
| CN107299725A (en) * | 2017-07-28 | 2017-10-27 | 东南大学 | A kind of prefabricated PC carbon fiber board tensioning rollering fastening system and its anchoring process |
| CN207597277U (en) * | 2017-11-22 | 2018-07-10 | 上海悍马建筑科技有限公司 | A kind of pre-stressed carbon fiber tensioning equipment |
-
2017
- 2017-11-22 CN CN201711174409.5A patent/CN107724258B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060126200A (en) * | 2005-06-03 | 2006-12-07 | 주식회사 엠텍 | Fiber composite panel with tension head and concrete twofold strengthening method by post-tensioning using it |
| CN106049300A (en) * | 2016-08-03 | 2016-10-26 | 深圳市威士邦建筑新材料科技有限公司 | Pull-type prestress carbon fiber bar tension device and construction method |
| CN107299725A (en) * | 2017-07-28 | 2017-10-27 | 东南大学 | A kind of prefabricated PC carbon fiber board tensioning rollering fastening system and its anchoring process |
| CN207597277U (en) * | 2017-11-22 | 2018-07-10 | 上海悍马建筑科技有限公司 | A kind of pre-stressed carbon fiber tensioning equipment |
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| Publication number | Publication date |
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| CN107724258A (en) | 2018-02-23 |
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