CN106192764A - A kind of pre-stress FRP concrete box type girder and production technology - Google Patents
A kind of pre-stress FRP concrete box type girder and production technology Download PDFInfo
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- CN106192764A CN106192764A CN201610703164.XA CN201610703164A CN106192764A CN 106192764 A CN106192764 A CN 106192764A CN 201610703164 A CN201610703164 A CN 201610703164A CN 106192764 A CN106192764 A CN 106192764A
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- frp
- concrete
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- type girder
- concrete box
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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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
- E01D19/00—Structural or constructional details of bridges
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
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Abstract
The invention discloses a kind of pre-stress FRP concrete box type girder and production technology, concrete box girder outside wall surface is provided with FRP outer tube, internal compressive region configures some FRP inner tubes, FRP internal tube fills core concrete, concrete box type girder tensile region is provided with some prestressing apparatus, is perfused with main body concrete inside concrete box type girder.The present invention is by being provided with FRP outer tube in the outside of coagulation box beam, ensure the globality of box beam and undertake Partial Shear, the core concrete of FRP internal tube bears pressure and controls the destruction of beam, the prestressing apparatus of tensile region bears pulling force, each several part cooperative cooperating, it is ensured that beam has good ultimate bearing capacity.Meanwhile, hollow chamber is set inside beam, alleviates deadweight and the cost of beam.In addition, due to prestressing apparatus and the use of FRP, the present invention possesses the ductility that normal usage energy is good, span ability is strong, endurance quality is superior and good, it is thus possible to promote FRP material application in civil engineering.
Description
Technical field
The present invention relates to the construction applications such as bridge, particularly to a kind of pre-stress FRP-concrete box type girder and production work
Skill.
Background technology
Concrete box type girder is because excellent performance, and form is graceful and is widely used in the infrastructure such as highway, railway.Pass
The concrete box type girder of system uses steel strand wires or reinforcing bar as tension part, and its structural behaviour depends on steel strand wires to a great extent
Or reinforcing bar.But when using in the environment of height corrosion, the steel strand wires of susceptibility-to-corrosion or reinforcing bar easily cause its performance because of corrosion
Substantially weaken, therefore need it is carried out complicated preservative treatment.If steel strand wires or reinforcing bar can not meet performance requirement because corroding
After, also needing it is replaced or box beam is carried out consolidation process, these maintenance measures are greatly increased the pipe of job facilities and support
Cost.
Fibre reinforced composites (FRP) are to have lightweight, the new material of the superior function such as high-strength, corrosion-resistant, the most extensively
General application structure field of reinforcement, is the most progressively applied in the construction of new structure.FRP material is applied to concrete box type girder
Build, it is possible to this is formed by the service life and the reduction pipe that are obviously improved job facilities.But, FRP material is bullet fragile material, its
Tension or stretching strain reach occur to rupture suddenly when its ultimate tensile strength or strain, and destructive process shows as the most crisp
Property, so that the destruction of common FRP-concrete box type girder is obvious fragility.In addition, common FRP-concrete
Beam rigidity is less, and span ability is the strongest, it is difficult to be applied to longspan structure system.
Summary of the invention
The main object of the present invention is to propose a kind of pre-stress FRP-concrete box type girder and production technology, it is intended to solve to pass
The problem that system Reinforcing Steel Bar In Reinforced Concrete Structure durability is not enough, span ability is not enough, common FRP muscle material ductility is poor, to promote
Enter FRP material range of application in civil engineering.
For achieving the above object, the present invention proposes a kind of pre-stress FRP-concrete box type girder, described pre-stress FRP-mixed
Solidifying soil box beam lateral surface is configured with FRP outer tube, and the internal compressive region configuration of described pre-stress FRP-concrete box type girder is some
FRP inner tube, the internal tensile region of described pre-stress FRP-concrete box type girder is provided with some prestressing apparatus, described FRP inner tube
Fill core concrete, in described FRP outer tube, pour main body concrete.
Preferably, described prestressing apparatus includes FRP pipe, FRP rope and anchorage, and described FRP rope is managed through described FRP
In, FRP rope described in described anchorage stretch-draw is to apply inward pressure to described pre-stress FRP-concrete box type girder.
Preferably, described prestressing apparatus includes corrugated tube, FRP rope and anchorage, and described FRP rope is through described ripple
In pipe, FRP rope described in described anchorage stretch-draw is to apply inward pressure to described pre-stress FRP-concrete box type girder.
Preferably, it is perfused with special cement slurry in described prestressing apparatus.
Preferably, described special cement slurry contains cement, superplasticizer and blocker, described superplasticizer and described blocker
It is respectively the 3% of described cement constituent weight.
Preferably, described FRP outer tube can be the prefabricated outer tube of FRP material or cloth-like FRP material is wound in described concrete box
The outer tube that type beam sidewall surfaces is formed.
Preferably, described core concrete is self-compacting concrete, and described main body concrete can be normal concrete, high-strength
One of concrete, expansive concrete, self-compacting concrete, recovery aggregate concrete, flyash concrete, fiber concrete.
The present invention also proposes a kind of technique producing pre-stress FRP-concrete box type girder, comprises the following steps:
1) described core concrete is poured in described FRP inner tube, and carry out maintenance；
2) fixing prefabricated described FRP outer tube, and by prefabricated hollow chamber template, in be filled with described in core concrete
FRP inner tube and described FRP pipe or described corrugated tube are fixed in described FRP outer tube；
3) by one end sealing of described FRP outer tube, and from one end of the described non-sealing of FRP outer tube to pouring main body coagulation
Soil, and carry out maintenance；
4) after the intensity that described main body concrete reaches predetermined, described FRP rope is run through and penetrates described FRP pipe or ripple
Pipe, uses FRP rope described in described anchorage stretch-draw to impose prestressing force；
5) excise the part that described FRP rope exposes, use shrinkage-free cement mortar sealing off and covering anchorage, by described anchorage and described
After FRP rope wraps up comprehensively, the described prestressing apparatus after sealing off and covering anchorage is irrigated described special cement slurry, finally carries out certain time
Interior maintenance.
Technical scheme is by being provided with FRP outer tube in the outside of coagulation box beam, it is ensured that the entirety of box beam
Property also undertakes Partial Shear, and the core concrete of FRP internal tube bears pressure and controls the destruction of beam, the prestressing force of tensile region
Device bears pulling force, each several part cooperative cooperating, it is ensured that beam has good ultimate bearing capacity.In addition, due to prestressing force
Device and the use of FRP, the present invention possess normal usage can good, span ability is strong, endurance quality is superior and good prolongs
Property, it is thus possible to promote FRP material application in civil engineering.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to the structure shown in these accompanying drawings.
Fig. 1 is the axonometric drawing of one embodiment of the invention；
Fig. 2 is the viewgraph of cross-section of one embodiment of the invention；
Fig. 3 is the axonometric drawing of another embodiment of the present invention；
Fig. 4 is the viewgraph of cross-section of another embodiment of the present invention；
Fig. 5 is the internal structure schematic diagram of the prestressing apparatus of the present invention.
Drawing reference numeral illustrates:
| Label | Title | Label | Title |
| 1 | FRP outer tube | 6 | Prestressing apparatus |
| 2 | FRP inner tube | 61 | Anchorage |
| 3 | Main body concrete | 62 | FRP manages |
| 4 | Hollow chamber | 63 | Special cement slurry |
| 5 | Core concrete | 64 | FRP rope |
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, broadly falls into the scope of protection of the invention.
If it is to be appreciated that the embodiment of the present invention relates to directivity instruction (such as up, down, left, right, before and after ...),
Then directionality instruction be only used for explaining under a certain particular pose (as shown in drawings) relative position relation between each parts,
Motion conditions etc., if this particular pose changes, then directionality instruction changes the most therewith.
If it addition, the embodiment of the present invention relates to the description of " first ", " second " etc., then should " first ", " second " etc.
Description be only used for describing purpose, and it is not intended that instruction or imply its relative importance or implicit indicate indicated skill
The quantity of art feature.Thus, define " first ", the feature of " second " can express or implicitly include at least one this spy
Levy.It addition, the technical scheme between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
Enough be embodied as basis, when the combination of technical scheme occur conflicting maybe cannot realize time will be understood that the knot of this technical scheme
Close and do not exist, the most not within the protection domain of application claims.
The present invention proposes a kind of concrete box type girder.
Seeing Fig. 1 to Fig. 5, the pre-stress FRP of the present invention-concrete box type girder outer side surface is provided with FRP outer tube 1, in advance should
The internal pressurized side of power FRP-concrete box type girder is provided with some FRP inner tubes 2, and wherein FRP inner tube 2 is internal is filled with core coagulation
Soil 5；The internal tension side of pre-stress FRP-concrete box type girder is provided with some prestressing apparatus 6, additionally pre-stress FRP-coagulation
It is perfused with main body concrete 3 as agent structure implant inside soil box beam.
In the above embodiment of the present invention, prestressing apparatus 6 includes anchorage 61, FRP pipe 62 and FRP rope 64, wherein
FRP rope 64 can be that a plurality of FRP bar is wound composition, and FRP rope 64 is through in FRP pipe 62 in actual installation, and anchorage 61 is then
It is anchored on the two ends of FRP rope 64.After anchorage 61 is anchored in FRP rope 64, pre-stress FRP-concrete box type girder is imposed inside
Pressure, the prestressing apparatus 6 after anchoring is internal is perfused with special cement slurry 63, and this special cement slurry 63 contains cement, surpasses
Moulding agent and blocker, wherein superplasticizer and blocker are respectively the 3% of cement constituent weight.In the present embodiment, it is filled in FRP inner tube
Core concrete 5 in 2 is self-compacting concrete, and the main body concrete 3 being filled in FRP outer tube 1 can be normal concrete, height
One of reinforced concrete, expansive concrete, self-compacting concrete, recovery aggregate concrete, flyash concrete, fiber concrete.
In the above embodiment of the present invention, by being provided with FRP outer tube 1 in the outside of coagulation box beam, it is ensured that prestressing force
The globality of FRP-concrete box type girder also undertakes Partial Shear, and the core concrete 5 within FRP inner tube 2 bears pressure and controls
The destruction of beam processed, the prestressing apparatus 6 of tensile region bears pulling force, each several part cooperative cooperating, it is ensured that beam has the good limit and holds
Loading capability.The FRP rope 64 being wound around by use and formed is to replace steel strand wires or reinforcing bar, under reaching same load action,
Avoid because of steel strand wires or reinforcing bar is perishable and that the cause structural behaviour of concrete box type girder reduces, thus promote that FRP material exists
Application in civil engineering.
In another embodiment of the invention, prestressing apparatus 6 includes corrugated tube, FRP rope 64 and anchorage 61, FRP rope
64 through in corrugated tube, and anchorage 61 is anchored on the two ends of FRP rope 64 and imposes pre-stress FRP-concrete box type girder inwardly
Pressure.In the present embodiment, use corrugated tube to be fixed on the inside of pre-stress FRP-concrete box type girder in advance, pre-answering can be prevented
Power apparatus 6 prevents FRP rope 64 from sliding during reality anchors, thus improves the reliability of anchoring.
In one more embodiment of the present invention, being arranged at the FRP outer tube 1 outside concrete box type girder is cloth-like FRP material
It is wound in the outer tube that concrete box type girder sidewall surfaces is formed.When concrete box type girder is after pouring, can be used directly wet
Patch method, is wound and is pasted on the lateral wall of concrete box type girder by FRP cloth, thus in actual production, simplifies further
Technological process.
The present invention also proposes a kind of technique producing concrete box type girder.
Before producing concrete box type girder, core concrete 5 is poured in FRP inner tube 2, wherein pour in FRP
The particle diameter of the aggregate in pipe 2 less than the internal diameter 1/4th of FRP inner tube 2, and should pour the concrete in FRP inner tube 2
It should be the concrete of self-compaction, maintenance in minimum 7 days after pouring, must be carried out, guaranteeing that FRP inner tube 2 concrete possesses one
Follow-up production can be carried out after determining intensity.
After core concrete 5 in FRP inner tube 2 possesses some strength, FRP outer tube 1 is fixed in advance, and by prefabricated
Hollow chamber template, in be filled with the FRP inner tube 2 of core concrete 5 and corrugated tube or FRP pipe 62 is fixed on outside FRP in advance
Correspondence position in pipe 1, during fixing in advance, can use concrete pad or use a small amount of cableway to carry out position
Put and determine, wherein hollow chamber template is positioned in concrete box type girder, in order in concrete box type girder, form hollow box
Room 4, thus alleviate the overall weight of concrete box type girder.
After the parts being arranged in FRP outer tube 1 determine relevant position, by one end sealing of FRP outer tube 1, and never seal
Solid one end in FRP outer tube 1, pour main body concrete, wherein main body concrete 3 can be selected for normal concrete, high-strength coagulation
One of soil, expansive concrete, self-compacting concrete, recovery aggregate concrete, flyash concrete, fiber concrete water
Build, then start maintenance in certain time.
After the intensity that main body concrete 3 reaches predetermined, FRP rope 64 is run through and penetrates in FRP pipe 62 or corrugated tube, at anchor
Before Gu, connect special union joint, to guarantee the seal of pipeline at FRP pipe 62 or corrugated tube.P-type extruding anchor is used during anchoring
Tool 61, installs profile wire lining ring and extruded sleeve in FRP rope 64 end, after utilizing special purpose extrusion press that extruded sleeve is squeezed through nib,
Make it produce plastic deformation and FRP rope 64 of holding with a firm grip, between extruded sleeve and FRP rope 64, there is no any space, form anchoring reliably.
When the strand quantity of a FRP rope 64 is more, monoblock billet is set when having any problem, billet can be divided into some pieces.Opening
Before drawing pre-stress FRP rope 64, check the intensity data of prestressed girder concrete test block, to guarantee that elastic modelling quantity reaches design and wants
Ask, before anchoring, must confirm whether concrete strength reaches stretch-draw requirement of strength, and check that template, with or without sinkage, finally makes
Stretch-draw is carried out with jack.
After stretch-draw, the part that excision FRP rope 64 exposes, use shrinkage-free cement mortar sealing off and covering anchorage, by anchorage 61 He
After FRP rope 64 wraps up comprehensively, the prestressing apparatus 6 after sealing off and covering anchorage is irrigated special cement slurry 63.Before mud jacking, duct and two ends
Airtight anchor cap must be used to seal, and without stone, sand and other foreign material in duct, it is ensured that duct is unimpeded, cleaning, dry and comfortable, the most clear
Grout hole on reason anchor plate, it is ensured that grout hole is unimpeded with duct to be connected, determines extraction vacuum end and grouting end, installs and draw
Pipe, ball valve and joint, and check its function, it is ensured that construction safety, smoothly.Wherein special cement slurry 63 contains cement, surpasses and mould
Agent and blocker, superplasticizer and blocker respectively account for the 3% of the cement constituent weight of special cement slurry 63, finally carry out a timing
Interior maintenance.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every at this
Under the inventive concept of invention, utilize the equivalent structure transformation that description of the invention and accompanying drawing content are made, or directly/indirectly use
The technical field relevant at other is included in the scope of patent protection of the present invention.
Claims (8)
1. pre-stress FRP-concrete box type girder, it is characterised in that described pre-stress FRP-concrete box type girder lateral surface
Be configured with FRP outer tube, the FRP inner tube that the internal compressive region configuration of described pre-stress FRP-concrete box type girder is some, described pre-should
The internal tensile region of power FRP-concrete box type girder is provided with some prestressing apparatus, and described FRP inner tube fills core concrete, institute
Main body concrete is poured in stating FRP outer tube.
2. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that described prestressing apparatus includes
FRP pipe, FRP rope and anchorage, described FRP rope is interior through described FRP pipe, and described in described anchorage stretch-draw, FRP rope is with to described
Pre-stress FRP-concrete box type girder applies inward pressure.
3. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that described prestressing apparatus includes ripple
Stricture of vagina pipe, FRP rope and anchorage, described FRP rope is through in described corrugated tube, and described in described anchorage stretch-draw, FRP rope is with to described
Pre-stress FRP-concrete box type girder applies inward pressure.
4. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that perfusion in described prestressing apparatus
There is special cement slurry.
5. pre-stress FRP-concrete box type girder as claimed in claim 4, it is characterised in that described special cement slurry contains
Cement, superplasticizer and blocker, described superplasticizer and described blocker are respectively the 3% of described cement constituent weight.
6. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that described FRP outer tube can be FRP material
The prefabricated outer tube of matter or cloth-like FRP material are wound in the outer tube that described concrete box type girder sidewall surfaces is formed.
7. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that described core concrete is from close
Real concrete, described main body concrete can be normal concrete, high-strength concrete, expansive concrete, self-compacting concrete, recovery
One of aggregate concrete, flyash concrete, fiber concrete.
8. the technique producing pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that include with
Lower step:
1) described core concrete is poured in described FRP inner tube, and carry out maintenance；
2) fixing prefabricated described FRP outer tube, and by prefabricated hollow chamber template, in be filled with the described FRP of core concrete
Inner tube and described FRP pipe or described corrugated tube are fixed in described FRP outer tube；
3) by one end sealing of described FRP outer tube, and from one end of the described non-sealing of FRP outer tube to pouring main body concrete, and
Carry out maintenance；
4) after the intensity that described main body concrete reaches predetermined, described FRP rope is run through and penetrates described FRP pipe or corrugated tube,
Use FRP rope described in described anchorage stretch-draw to impose prestressing force；
5) excise the part that described FRP rope exposes, use shrinkage-free cement mortar sealing off and covering anchorage, by described anchorage and described FRP rope
Comprehensively after parcel, the described prestressing apparatus after sealing off and covering anchorage is irrigated described special cement slurry, finally carries out in certain time
Maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610703164.XA CN106192764A (en) | 2016-08-22 | 2016-08-22 | A kind of pre-stress FRP concrete box type girder and production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610703164.XA CN106192764A (en) | 2016-08-22 | 2016-08-22 | A kind of pre-stress FRP concrete box type girder and production technology |
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| CN106192764A true CN106192764A (en) | 2016-12-07 |
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| CN201610703164.XA Pending CN106192764A (en) | 2016-08-22 | 2016-08-22 | A kind of pre-stress FRP concrete box type girder and production technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057147A (en) * | 2018-08-31 | 2018-12-21 | 广东工业大学 | Prestressing force assembly concrete beam |
| CN114991385A (en) * | 2022-05-12 | 2022-09-02 | 暨南大学 | Full FRP pipe seawater sea sand concrete beam and construction method thereof |
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| CN206219985U (en) * | 2016-08-22 | 2017-06-06 | 广东工业大学 | A kind of pre-stress FRP concrete box type girder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057147A (en) * | 2018-08-31 | 2018-12-21 | 广东工业大学 | Prestressing force assembly concrete beam |
| CN114991385A (en) * | 2022-05-12 | 2022-09-02 | 暨南大学 | Full FRP pipe seawater sea sand concrete beam and construction method thereof |
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