CN106544962B - The prestress reinforced construction method of concrete structure - Google Patents
The prestress reinforced construction method of concrete structure Download PDFInfo
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- CN106544962B CN106544962B CN201610963502.3A CN201610963502A CN106544962B CN 106544962 B CN106544962 B CN 106544962B CN 201610963502 A CN201610963502 A CN 201610963502A CN 106544962 B CN106544962 B CN 106544962B
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- reinforced
- concrete structure
- pull rod
- 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 methods of concrete structure, by being fixed on the adjustment of the rod length on the concrete structure to be reinforced, push slanting two struts stretching, extension；The CFRP cloth that strut end winds anchoring on reel is constantly rolled tightly and is elongated under strut promotion；CFRP cloth 5 is adjusted to and adhesive layer is bonding invests the concrete structural surface to be reinforced by elevation and subsidence regulating device；When adhesive layer reaches design cohesive force, CFRP cloth is cut；Remove pull rod, strut, reel and elevation and subsidence regulating device.This method can realize CFRP cloth material to structure along different directions and the prestress anchoraging at position.
Description
Technical field
The present invention relates to the prestress anchoraging and tension technology in a kind of prestress reinforced construction method of concrete structure,
The specifically prestress strengthening method of concrete structure.
Background technology
With the rapid development of China's traffic scale, 70% or so concrete-bridge is born into the excess of imports in Bridges in Our Country
Lotus service phase, many bridges enter the maintenance and reinforcement phase, and damage also occurs in the bridge being largely on active service soon, leads to China
The appearance of the more reinforcing maintenance engineering of bridge, the Tunnel Engineering of this phenomenon in the wild are even equally deposited in routine building engineering
.
Two common to the reinforcement means of concrete-bridge or works at present class reinforcing modes, when using dead burning plate,
Viscous carbon fiber board or the passive force way of fiber cloth carry out；Second is that using prestressing force, especially external prestressing technique carries out
Active force mode is reinforced.Performance requirement according to the loading characteristic of structure and degree of injury and after reinforcing, using pre-
Stress is reinforced, and can restore even improve the bearing capacity of structure completely to a certain extent.And use dead burning plate and FRP plate or cloth
Mode, due to being the remedial measure that carries out after structure has occurred to destroy or rigidity changes, thus in performance or
Carrying force direction can not be restored to original design point.
Invention content
The defects of the present invention is directed to overcome the prior art, provides a kind of prestress strengthening method of concrete structure, by
The self friction power of CFRP cloth during the winding process overcomes intermediate plate anchoring that the shear action of fiber is realized and anchored to FRP cloth；Again
By integrated strut and Tiebar structure, the parallel tensioning to cloth material is realized.Then it is pasted on and adds fixing structure surface, you can
It realizes and prestressing force effect is applied to structure.
In order to solve the above-mentioned technical problem, the invention is realized in this way：
A kind of prestress reinforced construction method of concrete structure, it is characterised in that it includes the following steps：
Step 1：It drills on the concrete structure to be reinforced；
Step 2：Pull rod is penetrated in above-mentioned hole, the upper and lower ends of the pull rod are equipped with screw thread, and the top of pull rod is stretched out will
The concrete structure upper surface of reinforcing is in the concrete structure to be reinforced and fixed, and what is reinforced stretched out in the lower part of pull rod
Concrete structure lower surface, respectively by one end of hinge two struts of oblique connection, two struts lead to for the lower part both sides of pull rod
It crosses down adjusting nut and is fixed on pull rod lower part；The concrete structure both ends lower part to be reinforced is respectively equipped with lift adjustment dress
It puts, elevation and subsidence regulating device is equipped with reel, there is gap, two struts between reel and the concrete structure to be reinforced of upper part
The other end connect the centers of two reels respectively；
Step 3：CFRP cloth is wound on reel；
Step 4：Adjusting yoke pushes the slanting two struts stretching, extension being connected with pull rod, while drives two pole points
The CFRP cloth that portion is anchored with roll type is constantly stretched and is rolled tightly under strut promotion；
Step 5：Adhesive layer is smeared in the concrete structure lower surface to be reinforced；
Step 6：Elevation and subsidence regulating device is adjusted, the CFRP cloth height-regulating after stretching is made into itself and the concrete structure to be reinforced
The adhesive layer of lower surface is bonded together；
Step 7：After layer to be bonded reaches adhesion strength, CFRP cloth is cut at reel and removes pull rod, strut, reel
And elevation and subsidence regulating device.
The prestress reinforced construction method of the concrete structure, it is characterised in that：The concrete structure to be reinforced is cut
When face is low, the top of pull rod is stretched out the concrete structure upper surface to be reinforced and is fixed by upper adjusting nut；That to be reinforced is mixed
When Xtah Crude Clay structure is hollow-core construction, the top of pull rod is set in the concrete structure to be reinforced and is fixed by upper adjusting nut；
During the concrete structure section thickness to be reinforced, the top of pull rod is set in the concrete structure to be reinforced and passes through bar planting or anchoring
Bolt is fixed.
The prestress reinforced construction method of the concrete structure, it is characterised in that：The support of pull rod lower part both sides
Bar is arranged using asymmetric.
The beneficial effects of the invention are as follows：This method can realize CFRP cloth material to structure along different directions and the prestressing force at position
Anchoring.Pulling force is transmitted by the frictional force of itself between CFRP fibers, overcomes fastening destruction weakness；Make full use of the soft of CFRP cloth
Feature realizes tensioning by the jacking of itself, so as to fulfill tensioning and sticking construction integrated construction, had both reduced construction work
Sequence, while conventional anchoring system is saved, realize economy efficiently construction method.
This method is suitable for bridge, structure, the entirety of tunnel structure or local prestressed reinforcement.Utilize the anchoring of this patent
And method for stretching, with reference to corresponding jacking or tensioning process, the repairing and reinforcing effect to bridge and other concrete structures can be improved
Rate.
Description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 reinforces schematic diagram for 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 numeral:Reinforced structure 1, pull rod 2, strut 3, reel 4, CFRP cloth 5, elevation and subsidence regulating device 6, adhesive layer 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 concrete structure, it includes the following steps：
Step 1：It drills on reinforced structure 1；
Step 2：Pull rod 2 is penetrated in above-mentioned hole, the upper and lower ends of the pull rod are equipped with screw thread, and the top of pull rod is stretched out
The concrete structure upper surface or in the concrete structure to be reinforced and fixed to be reinforced, the lower part of pull rod are stretched out and to be reinforced
Concrete structure lower surface, the lower part both sides of pull rod pass through one end of two struts 3 of oblique connection of hinge 8, two supports respectively
Bar is fixed on pull rod lower part by lower adjusting nut 10；The concrete structure both ends lower part to be reinforced is respectively equipped with rising-falling tone
Regulating device 6, elevation and subsidence regulating device are equipped with reel 4, there is gap between reel and the concrete structure to be reinforced of upper part, 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 pushes the slanting two struts stretching, extension being connected with pull rod, while drives two pole points
The CFRP cloth that portion is anchored with roll type is constantly stretched and is rolled tightly under strut promotion；
Step 5：Adhesive layer 7 is smeared in the concrete structure lower surface to be reinforced；
Step 6：Elevation and subsidence regulating device is adjusted, the CFRP cloth height-regulating after stretching is made into itself and the concrete structure to be reinforced
The adhesive layer of lower surface is bonded together；
Step 7：After layer to be bonded reaches adhesion strength, CFRP cloth is cut at reel and removes pull rod, strut, reel
And elevation and subsidence regulating device.
The pulling force generated and strut component force balance feature are shortened according to pull rod, arranged using asymmetric, and pull rod
With strut point of intersection using hinge-connection form, realize that CFRP cloth and body structure surface position are adaptive.
As shown in Figure 2：If 1 section of reinforced structure is low, using penetration tension structure, the top of pull rod, which is stretched out, to 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, such as box-shaped beam section, and the bottom slab stress peace of tension
Entirely, intracavity can be used；Pull rod penetrates its middle part from 1 bottom of reinforced structure and is located in reinforced structure 1 and passes through upwards
Upper adjusting nut 9 is fixed；
As shown in Figure 4：During the concrete structure section thickness to be reinforced, the top of pull rod is set in reinforced structure 1 and leads to
It crosses bar planting or anchor bolt 10 is fixed.
Anchor force is provided by the frictional force of CFRP cloth interlayer itself, pull rod lower part 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 realizes the spacing stretching, extension of strut end, is inconjunction with strut end to roll up
The CFRP cloth of cartridge type anchoring is stretched and is rolled tightly, by adjusting the CFRP and the spacing of ruggedized construction after 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
To the prestressed reinforcement of structure.
Claims (3)
1. a kind of prestress reinforced construction method of concrete structure, which is characterized in that by CFRP cloth during the winding process
Self friction power overcomes intermediate plate anchoring that the shear action of fiber is realized and anchored to FRP cloth；Again by integrated strut and drawing
Rod structure realizes the parallel tensioning to cloth material；Then it is pasted on and adds fixing structure surface, you can realize and prestressing force is applied to structure
Effect；
It includes the following steps：
Step 1：It drills on the concrete structure to be reinforced；
Step 2：The design method of the integrated strut and Tiebar structure：
Pull rod is penetrated in above-mentioned hole, the upper and lower ends of the pull rod are equipped with screw thread, and the coagulation to be reinforced is stretched out on the top of pull rod
Soil structure upper surface is in the concrete structure to be reinforced and fixed, and the concrete structure to be reinforced is stretched out in the lower part of pull rod
Lower surface, respectively by one end of hinge two struts of oblique connection, two struts pass through lower adjusting spiral shell for the lower part both sides of pull rod
Mother is fixed on pull rod lower part；The concrete structure both ends lower part to be reinforced is respectively equipped with elevation and subsidence regulating device, lift adjustment
Device is equipped with reel, there is gap, the other end point of two struts between reel and the concrete structure to be reinforced of upper part
Not Lian Jie two reels center；
Step 3：CFRP cloth is wound on reel；
Step 4：Adjusting yoke, push be connected with pull rod slanting two struts stretching, extension, while drive two strut ends with
The CFRP cloth of roll type anchoring is constantly stretched and is rolled tightly under strut promotion；
Step 5：Adhesive layer is smeared in the concrete structure lower surface to be reinforced；
Step 6：Elevation and subsidence regulating device is adjusted, the CFRP cloth height-regulating after stretching is made into itself and the concrete structure following table to be reinforced
The adhesive layer in face is bonded together；
Step 7：After layer to be bonded reaches adhesion strength, CFRP cloth is cut at reel and removes pull rod, strut, reel and liter
Falling tone regulating device.
2. the prestress reinforced construction method of concrete structure according to claim 1, it is characterised in that：That to be reinforced is mixed
When Xtah Crude Clay structure section is low, the top of pull rod is stretched out the concrete structure upper surface to be reinforced and is fixed by upper adjusting nut；
When the concrete structure to be reinforced is hollow-core construction, the top of pull rod is set in the concrete structure to be reinforced and passes through upper adjusting
Nut is fixed；During the concrete structure section thickness to be reinforced, the top of pull rod is set in the concrete structure to be reinforced and passes through
Bar planting or anchor bolt are fixed.
3. the prestress reinforced construction method of concrete structure according to claim 2, it is characterised in that：Under the pull rod
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 CN106544962A (en) | 2017-03-29 |
| CN106544962B true CN106544962B (en) | 2018-07-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339457B (en) * | 2018-10-29 | 2020-11-03 | 东南大学 | Displacement self-restraint type prestress FRP sheet tensioning device and implementation method thereof |
| 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 |
| 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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| 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 |
-
2016
- 2016-10-28 CN CN201610963502.3A patent/CN106544962B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN106544962A (en) | 2017-03-29 |
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