CN106544962A - The prestress reinforced construction method of xoncrete structure - Google Patents
The prestress reinforced construction method of xoncrete structure Download PDFInfo
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- CN106544962A CN106544962A CN201610963502.3A CN201610963502A CN106544962A CN 106544962 A CN106544962 A CN 106544962A CN 201610963502 A CN201610963502 A CN 201610963502A CN 106544962 A CN106544962 A CN 106544962A
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- reinforced
- pull bar
- xoncrete structure
- strut
- reel
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- 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
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to a kind of prestress reinforced construction method of xoncrete structure, the adjustment of the pull bar length by being fixed on xoncrete structure to be reinforced, promote two oblique struts to stretch；Strut end winds the CFRP cloth of anchoring on reel and under strut promotion constantly rolls tightly and elongate；CFRP cloth 5 is adjusted to bonding with tack coat invest concrete structural surface to be reinforced by elevation and subsidence regulating device；When tack coat reaches design cohesive force, CFRP cloth is cut off；Remove pull bar, strut, reel and elevation and subsidence regulating device.The method be capable of achieving CFRP cloth material to structure along different directions and position prestress anchoraging.
Description
Technical field
The present invention relates to the prestress anchoraging and tension technology in a kind of prestress reinforced construction method of xoncrete structure,
The specifically prestress strengthening method of xoncrete structure.
Background technology
With developing rapidly for China's traffic scale, in Bridges in Our Country, 70% or so concrete-bridge enters the excess of imports and bears
Lotus service phase, many bridges enter the maintenance and reinforcement phase, and the bridge being on active service in a large number soon also occurs in that damage, causes China
The appearance of the more reinforcing maintenance engineering of bridge, equally deposits in this phenomenon Tunnel Engineering in the wild even routine building engineering
.
Two at present common to the reinforcement means of concrete-bridge or works class reinforcing modes, one be using dead burning plate,
The passive force way of viscous carbon fiber board or fiber cloth is carried out；Two is to adopt prestressing force, and especially external prestressing technique is carried out
Active force mode is reinforced.According to the loading characteristic and degree of injury of structure, and the performance after reinforcing is required, using pre-
Stress is reinforced, and can recover or even can improve the bearing capacity of structure to a certain extent completely.And adopt dead burning plate and FRP plate or cloth
Mode, due to being occur to destroy or the remedial measure that carries out after rigidity changes in structure, thus in performance or
Carry force direction and cannot return to original design point.
The content of the invention
It is contemplated that overcoming the defect of prior art, there is provided a kind of prestress strengthening method of xoncrete structure, by
Self friction power of the CFRP cloth in winding process overcomes shear action of the intermediate plate anchoring to fiber, and FRP cloth is realized anchoring；Again
By the strut and Tiebar structure of integration, the parallel tensioning to cloth material is realized.Then it is pasted on and adds fixing structure surface, you can
Realize applying prestressing force effect to structure.
In order to solve above-mentioned technical problem, what the present invention was realized in：
A kind of prestress reinforced construction method of xoncrete structure, it is characterised in that it comprises the steps：
Step one：Drill on xoncrete structure to be reinforced；
Step 2：Pull bar is penetrated in above-mentioned hole, the upper and lower ends of the pull bar are provided with screw thread, and the top of pull bar is stretched out will
The xoncrete structure upper surface of reinforcing is in xoncrete structure to be reinforced and fixed, and the bottom of pull bar stretches out to be reinforced
Xoncrete structure lower surface, respectively by one end of hinge two struts of oblique connection, two struts lead to for the bottom both sides of pull bar
Cross down adjusting nut and be fixed on pull bar bottom；The xoncrete structure two ends bottom to be reinforced is respectively equipped with lift adjustment dress
Put, elevation and subsidence regulating device is provided between the xoncrete structure to be reinforced on reel, reel and its top space, two struts
The other end connect the center of two reels respectively；
Step 3：CFRP cloth is wound on reel；
Step 4：Adjusting yoke, promotes the oblique two piece strut being connected with pull bar to stretch, while driving two pole points
Portion under strut promotion is constantly stretched and is rolled tightly with the CFRP cloth that roll type is anchored；
Step 5：Tack coat is smeared in xoncrete structure lower surface to be reinforced；
Step 6：Elevation and subsidence regulating device is adjusted, the CFRP cloth after stretching is heightened makes which with xoncrete structure to be reinforced
The tack coat of lower surface is bonded together；
Step 7：After layer to be bonded reaches adhesion strength, CFRP cloth is cut off at reel and pull bar, strut, reel is removed
And elevation and subsidence regulating device.
The prestress reinforced construction method of described xoncrete structure, it is characterised in that：Xoncrete structure to be reinforced cuts
When face is low, the top of pull bar is stretched out xoncrete structure upper surface to be reinforced and is fixed by upper adjusting nut；To be reinforced is mixed
When Xtah Crude Clay structure is hollow-core construction, the top of pull bar is fixed in xoncrete structure to be reinforced and by upper adjusting nut；
When xoncrete structure section to be reinforced is thick, the top of pull bar is in xoncrete structure to be reinforced and by bar planting or anchoring
Bolt is fixed.
The prestress reinforced construction method of described xoncrete structure, it is characterised in that：The support of pull bar bottom both sides
Bar is arranged using asymmetric.
The invention has the beneficial effects as follows：The method be capable of achieving CFRP cloth material to structure along different directions and position prestressing force
Anchoring.By the frictional force transmission pulling force of itself between CFRP fibers, fastening destruction weakness is overcome；Make full use of the soft of CFRP cloth
Feature, realizes tensioning by the jacking of itself, so as to realize tensioning and sticking construction integrated construction, has both reduced construction work
Sequence, while saving conventional anchoring system, realizes economy efficiently construction method.
This method is applied to bridge, structure, the entirety of tunnel structure or local prestressed reinforcement.Using the anchoring of this patent
And method for stretching, with reference to corresponding jacking or tensioning process, the repairing and reinforcing to bridge and other xoncrete structures can be improved and imitated
Rate.
Description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is that schematic diagram is reinforced in the anchoring jacking tensioning of CFRP cloth.
Fig. 2 is Fig. 1 penetration tensioning schematic diagrames.
Fig. 3 is Fig. 1 intracavity tensioning schematic diagrames.
Fig. 4 is Fig. 1 anchoring type tensioning schematic diagrames.
Reference:Reinforced structure 1, pull bar 2, strut 3, reel 4, CFRP cloth 5, elevation and subsidence regulating device 6, tack coat 7,
Hinge 8, upper adjusting nut 9, lower adjusting nut 10, anchor bolt 11.Specific embodiment
As shown in Figure 1：
A kind of prestress reinforced construction method of xoncrete structure, it comprises the steps：
Step one：Drill on reinforced structure 1；
Step 2：Pull bar 2 is penetrated in above-mentioned hole, the upper and lower ends of the pull bar are provided with screw thread, and the top of pull bar is stretched out
Xoncrete structure upper surface to be reinforced is in xoncrete structure to be reinforced and fixed, and the bottom of pull bar is stretched out and will be reinforced
Xoncrete structure lower surface, the bottom both sides of pull bar are respectively by one end of two struts 3 of oblique connection of hinge 8, two supports
Bar is fixed on pull bar bottom by lower adjusting nut 10；The xoncrete structure two ends bottom to be reinforced is respectively equipped with rising-falling tone
Regulating device 6, elevation and subsidence regulating device is provided between the xoncrete structure to be reinforced on reel 4, reel and its top space, and two
The other end of root strut connects the center of two reels respectively；
Step 3：CFRP cloth 5 is wound on reel；
Step 4：Adjusting yoke, promotes the oblique two piece strut being connected with pull bar to stretch, while driving two pole points
Portion under strut promotion is constantly stretched and is rolled tightly with the CFRP cloth that roll type is anchored；
Step 5：Tack coat 7 is smeared in xoncrete structure lower surface to be reinforced；
Step 6：Elevation and subsidence regulating device is adjusted, the CFRP cloth after stretching is heightened makes which with xoncrete structure to be reinforced
The tack coat of lower surface is bonded together；
Step 7：After layer to be bonded reaches adhesion strength, CFRP cloth is cut off at reel and pull bar, strut, reel is removed
And elevation and subsidence regulating device.
Shorten the pulling force and strut component force balance feature for producing according to pull bar, arranged using asymmetric, and pull bar
Hinge-connection form is adopted with strut point of intersection, CFRP cloth and body structure surface position self adaptation is realized.
As shown in Figure 2：If 1 section of reinforced structure is low, using penetration tension structure, the top of pull bar is stretched out and will be added
1 upper surface of fixing structure is simultaneously fixed by upper adjusting nut 9；
As shown in Figure 3：If reinforced structure 1 is hollow-core construction, the bottom slab stress peace of such as box-shaped beam section, and tension
Entirely, intracavity can be adopted；Pull bar penetrates in the middle part of which from 1 bottom up of reinforced structure and is located in reinforced structure 1 and passes through
Upper adjusting nut 9 is fixed；
As shown in Figure 4：When xoncrete structure section to be reinforced is thick, the top of pull bar is located in reinforced structure 1 and leads to
Cross bar planting or anchor bolt 10 is fixed.
Anchor force is provided by the frictional force of CFRP cloth interlayer itself, pull bar bottom both sides difference is oblique to connect a strut,
According to strut and the motor-driven principle of connecting rod, the change of length of connecting rod, realize that strut tip spacing stretches, be inconjunction with strut end to roll up
The CFRP cloth of cartridge type anchoring is stretched and is rolled tightly, the spacing of CFRP and ruggedized construction after adjusting stretching, after stretching
CFRP cloth is pasted on reinforced structure, when layer to be bonded reaches design strength, is cut CFRP and release pole structure, that is, is realized
Prestressed reinforcement to structure.
Claims (3)
1. a kind of prestress reinforced construction method of xoncrete structure, it is characterised in that it comprises the steps：
Step one：Drill on xoncrete structure to be reinforced；
Step 2：Pull bar is penetrated in above-mentioned hole, the upper and lower ends of the pull bar are provided with screw thread, and the top of pull bar is stretched out and will be reinforced
Xoncrete structure upper surface or in xoncrete structure to be reinforced and fixed, coagulation to be reinforced is stretched out in the bottom of pull bar
Soil structure lower surface, the bottom both sides of pull bar pass through one end of hinge two struts of oblique connection respectively, under two struts pass through
Adjusting nut is fixed on pull bar bottom；The xoncrete structure two ends bottom to be reinforced is respectively equipped with elevation and subsidence regulating device, rises
Falling tone regulating device is provided between the xoncrete structure to be reinforced on reel, reel and its top space, two struts it is another
One end connects the center of two reels respectively；
Step 3：CFRP cloth is wound on reel；
Step 4：Adjusting yoke, promotes the oblique two piece strut that is connected with pull bar to stretch, at the same two strut ends of drive with
The CFRP cloth of roll type anchoring under strut promotion is constantly stretched and is rolled tightly；
Step 5：Tack coat is smeared in xoncrete structure lower surface to be reinforced；
Step 6：Elevation and subsidence regulating device is adjusted, the CFRP cloth after stretching is heightened makes which with xoncrete structure following table to be reinforced
The tack coat in face is bonded together；
Step 7：After layer to be bonded reaches adhesion strength, CFRP cloth is cut off at reel and pull bar, strut, reel and liter is removed
Falling tone regulating device.
2. the prestress reinforced construction method of xoncrete structure according to claim 1, it is characterised in that：To be reinforced is mixed
When Xtah Crude Clay structure section is low, the top of pull bar is stretched out xoncrete structure upper surface to be reinforced and is fixed by upper adjusting nut；
When xoncrete structure to be reinforced is hollow-core construction, the top of pull bar is in xoncrete structure to be reinforced and by upper regulation
Nut is fixed；When xoncrete structure section to be reinforced is thick, the top of pull bar is located in xoncrete structure to be reinforced and passes through
Bar planting or anchor bolt are fixed.
3. the prestress reinforced construction method of xoncrete structure according to claim 2, it is characterised in that：Under the pull bar
The strut of portion both sides is arranged using asymmetric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610963502.3A CN106544962B (en) | 2016-10-28 | 2016-10-28 | The prestress reinforced construction method of concrete structure |
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|---|---|---|---|
| CN201610963502.3A CN106544962B (en) | 2016-10-28 | 2016-10-28 | The prestress reinforced construction method of concrete structure |
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| CN106544962A true CN106544962A (en) | 2017-03-29 |
| CN106544962B CN106544962B (en) | 2018-07-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339457A (en) * | 2018-10-29 | 2019-02-15 | 东南大学 | It is a kind of to be displaced from constraint formula pre-stress FRP sheet material tensioning equipment and its implementation method |
| CN114135118A (en) * | 2021-12-09 | 2022-03-04 | 同济大学 | FRP prestress monitoring and adjusting device and method capable of realizing intelligent service |
| CN114809704A (en) * | 2022-05-24 | 2022-07-29 | 重庆达力索缆科技有限公司 | Tightening type external prestress CFRP material reinforcing system and construction method |
| CN114892549A (en) * | 2022-05-24 | 2022-08-12 | 重庆达力索缆科技有限公司 | Expansion filling type external prestress CFRP material reinforcing system and construction method thereof |
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| KR100981091B1 (en) * | 2009-10-23 | 2010-09-09 | 리플래시기술 주식회사 | Construction method for repairing/reinforcing concrete structure |
| CN105064224A (en) * | 2015-09-02 | 2015-11-18 | 山东大学 | Device and method for tensioning and reinforcing double layers of pre-stress carbon fiber sheet at same time |
| CN105507169A (en) * | 2016-01-16 | 2016-04-20 | 哈尔滨工业大学 | Tensioning and anchoring device for reinforcing reinforced concrete bridge through prestress FRP(fiber reinforced plastic) cloth and reinforcing method |
| CN205476522U (en) * | 2016-03-28 | 2016-08-17 | 中国电力工程顾问集团东北电力设计院有限公司 | From locking -type prestressing force carbon cloth tensioning equipment |
| CN105887702A (en) * | 2016-04-20 | 2016-08-24 | 武汉理工大学 | Method for reinforcing concrete beam by prestressed carbon fiber plate and steel-concrete |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100981091B1 (en) * | 2009-10-23 | 2010-09-09 | 리플래시기술 주식회사 | Construction method for repairing/reinforcing concrete structure |
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| CN105507169A (en) * | 2016-01-16 | 2016-04-20 | 哈尔滨工业大学 | Tensioning and anchoring device for reinforcing reinforced concrete bridge through prestress FRP(fiber reinforced plastic) cloth and reinforcing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339457A (en) * | 2018-10-29 | 2019-02-15 | 东南大学 | It is a kind of to be displaced from constraint formula pre-stress FRP sheet material tensioning equipment and its implementation method |
| CN114135118A (en) * | 2021-12-09 | 2022-03-04 | 同济大学 | FRP prestress monitoring and adjusting device and method capable of realizing intelligent service |
| CN114135118B (en) * | 2021-12-09 | 2022-08-09 | 同济大学 | FRP prestress monitoring and adjusting device and method capable of realizing intelligent service |
| CN114809704A (en) * | 2022-05-24 | 2022-07-29 | 重庆达力索缆科技有限公司 | Tightening type external prestress CFRP material reinforcing system and construction method |
| CN114892549A (en) * | 2022-05-24 | 2022-08-12 | 重庆达力索缆科技有限公司 | Expansion filling type external prestress CFRP material reinforcing system and construction method thereof |
| CN114809704B (en) * | 2022-05-24 | 2024-01-26 | 重庆达力索缆科技有限公司 | Tightening type external prestress CFRP material reinforcing system and construction method |
| CN114892549B (en) * | 2022-05-24 | 2024-05-14 | 重庆达力索缆科技有限公司 | Expansion filling type external prestress CFRP material reinforcing system and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN106544962B (en) | 2018-07-03 |
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