CN106223212B - A kind of reinforcement means by fired damage bridge - Google Patents
A kind of reinforcement means by fired damage bridge Download PDFInfo
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- CN106223212B CN106223212B CN201610654143.3A CN201610654143A CN106223212B CN 106223212 B CN106223212 B CN 106223212B CN 201610654143 A CN201610654143 A CN 201610654143A CN 106223212 B CN106223212 B CN 106223212B
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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
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The invention discloses a kind of reinforcement means by fired damage bridge, belong to construction method field.The hollow slab girder or T beams or small box girder of this method bridge fired damage, using artificial chisel except mode is cut to the concrete loosely peeled off below the hollow slab girder or T beams or small box girder of fired damage, beam slab following table surface concrete is rinsed well using giant；Steel plate or girder steel are lifted again, while pours high-strength binding material, and its damage location is strengthened.The reinforcement means of the present invention can greatly improve the vertical rigidity and globality of fired damage bridge, recover the operation bearing capacity of bridge as early as possible.Meanwhile unsupported reinforced construction method, both solved the problems, such as such bridge vertical rigidity and horizontal globality deficiency, solving again can not staking or the very high problem of staking cost below bridge.Meanwhile it is short, easy for construction to have the advantages that reinforcing process takes.
Description
Technical field
The invention belongs to construction method field, and in particular to a kind of reinforcement means by fired damage bridge.
Background technology
In recent years, Chinese Highway bridge construction develops rapidly, below the bridge of the highway bridge particularly combination area of city and country easily
Combustion things cause fire more due to influence factor, it is difficult to control, also gradually increasing by the number of fire.Fire not only causes
Serious economic loss, and the reinforced concrete structure of bridge fire physics and chemical action under, its intensity and springform
The mechanical properties such as amount will decline, and the adhesion strength between reinforcing bar and concrete is corresponding to be declined, and the section bearing capacity of bridge can also reduce,
Bridge security hidden danger is caused, and then influences highway operation safety.Therefore, it is necessary to quickly the degree of injury of bridge structure is made just
True judgement, and then scientific and reasonable restoring and fastening method is taken, recover to be open to traffic as early as possible, loss caused by fire is dropped to
It is minimum, it is current urgent problem." steel plate-Combined concrete reinforcement means experimental study and practical application of bridge " (Shi Xiong
It is big, 2012) a kind of bridge reinforcing method commonly used in the prior art that overdoes is disclosed, predominantly：To burning critical regions beam body
Using composite reinforcement, general area beam body uses affixing steel plate reinforcement.Using reinforcing bar by Interal fixation on cored slab, while
It is filled between cored slab and steel plate using air-free concrete.This method can actually play a part of reinforcing in theory, but
Be applicants have found that, in actual use, on the one hand because its steel plate only covers the bottom plate to overdo and part abdomen
Plate, therefore load can be concentrated on gradually at the unlapped web of steel plate during follow-up use, and the structure of the subregion is pacified
Cause a hidden trouble entirely；On the other hand, its steel plate is fixed using reinforcing bar implantation beam body, and this can weaken the bending rigidity of beam, is influenceed
Its bearing capacity.Meanwhile be filled using air-free concrete, its deficiency of adhesive property between original concrete, steel plate,
Easily lead to come off.Further, above-mentioned construction method needs to lay support, not only takes, and influences operation and is open to traffic speed,
Also it is not used to have the difficult area of the erection brackets such as current demand under bridge.Therefore, up for provide it is a kind of preferably by
The reinforcement means of fired damage bridge.
The content of the invention
It is an object of the invention to solve problems of the prior art, and provide a kind of by fired damage bridge
Reinforcement means, bridge can be made to recover to be open to traffic as early as possible in the case where ensureing bridge structure safe.
The technical solution adopted in the present invention is as follows：
By the reinforcement means of fired damage bridge, be directed to bridge fired damage part for hollow slab girder or T beams or
One of small box girder.The reinforcement means main purpose of the present invention is to improve bridge vertical rigidity and globality after reinforcing, reduces lotus
The difference of cross direction profiles ratio and design is carried, improves the bearing capacity of bridge.
The reinforcement means of hollow slab girder is：
1.1 remove deck paving, cut beam slab hinge and stitch and strengthened using bar planting；
1.2 use artificial chisel except mode is cut to the concrete loosely peeled off below the hollow slab girder of fired damage,
Beam panel surface concrete is cleaned using giant, and the reinforcing bar of corrosion is derusted, cleaned, then reinforcing bar is prevented
Rust processing；
Beam slab hinge seam both ends between 1.3 two bent caps erect hanging device, and lifting rope stitches lifting H profile steel beam or double by cutting with scissors
It is in place to spell channel-section steel, then connects connecting screw, two bar shaped catch are pasted on H profile steel beam or Two bors d's oeuveres channel-section steel top flange, are made
Accommodating cavity is formed between the edge of a wing, bar shaped catch and beam slab bottom surface with hinged seam；Meanwhile fixed at the hinge seam above bent cap
Steel plate.The steel plate plays a part of sealing hinge seam above bent cap, and it, which can be separately provided, to use the top flange of girder steel to prolong
Stretch realization；
1.4 pour high-strength binding material into beam slab hinge seam, high-strength binding material is filled up described accommodating cavity and hinge
Seam, beam slab and girder steel bonding is integral, play common stress deformation effect；
Exfoliation is repaired using polymer mending mortar at 1.5 other positions for being cut concrete；
The reinforcement means of T beams is：
2.1 use artificial chisel except mode is cut to the concrete loosely peeled off below the T beams of fired damage, using height
Pressure hydraulic giant is cleaned beam panel surface concrete, and the reinforcing bar of corrosion is derusted, cleaned, then reinforcing bar is made at antirust
Reason；
2.2 are punchinged in the wet seam crossing of floorings, and hanging device, the hole that lifting rope is dug out by wet seam crossing are erected above T beams
Hole lifting U-shaped steel plate hoop is in place, makes the whole bottom plate and web of U-shaped steel plate hoop covering T beams, then connects Screw arbor with nut at both-ends by U-shaped
Steel plate hoop is fixed on T beams；
2.3 expire high-strength binding material to pressure injection between T beams and U-shaped steel plate hoop, and T beams and the bonding of U-shaped steel plate hoop is integral,
Play common stress deformation effect；
Exfoliation is repaired using polymer mending mortar at 2.4 other positions for being cut concrete；
The reinforcement means of small box girder is：
3.1 use artificial chisel except mode is cut to the concrete loosely peeled off below the small box girder of fired damage, adopt
Beam panel surface concrete is cleaned with giant, and the reinforcing bar of corrosion is derusted, cleaned, then antirust is made to reinforcing bar
Processing；
3.2 are punchinged in the wet seam crossing of floorings, and hanging device is erected above small box girder, and lifting rope is dug out by wet seam crossing
Hole lifting U-shaped steel plate hoop it is in place, make U-shaped steel plate hoop covering small box girder whole bottom plate and web, then connect to draw spiral shell
U-shaped steel plate hoop is fixed on small box girder by bar；
3.3, to the full high-strength binding material of pressure injection between small box girder and U-shaped steel plate hoop, small box girder and U-shaped steel plate hoop are bonded
It is integral, play common stress deformation effect；
Exfoliation is repaired using polymer mending mortar at 3.4 other positions for being cut concrete.
Heretofore described U-shaped steel plate hoop refers to generally U-shaped or matrix the structure being welded with steel plate.
In above-mentioned reinforcing process, it is necessary first to which the concrete loosely peeled off below the hollow slab girder of fired damage is dug
Remove.If without cutting direct reparation, the part is come off during follow-up use, influence globality.Further,
The bottom plate and web that seam, T beams or small box girder are cut with scissors to beam slab carry out steel plate/strengthening of steel bridge, while irrigate the high-strength cohesive material such as MPC
Material, steel plate/girder steel, binding material and original beam body is formed an entirety, common stress deformation, prevent excessive load from gathering
A certain fragile position is combined in, causes potential safety hazard.Further, the construction in the present invention to hollow slab girder employs no support side
Formula, i.e., hanging device directly is set up at both ends, girder steel is hung to beam slab bottom, by cutting with scissors seam infusion and binding material thereto.Should
Method can greatly improve the construction convenience for having the unsuitable erection bracket area such as current demand under bridge.
Preferably, described high-strength binding material should meet to require as follows：1) it is not less than with Concrete Bond Strength
2.5Mpa；2) elastic model amount is more than 1000Mpa；3) after mixing and stirring, setting time is more than half an hour；4) bonding within 6 hours
Intensity is above standard the half of intensity.
The These parameters selection gist of high-strength binding material is described below.In the present invention, binding material role
Be divided into two aspects, when between improving different hollow slab girders, the globality structural strength of T beams or small box girder；Second, by Two bors d's oeuveres groove
Steel or H profile steel beam are bonded in hollow slab girder bottom and T beams or small box girder cladding plate side.1) general concrete breaking resistance is
2Mpa, therefore, Concrete Bond Strength should be not less than 2Mpa, are preferably not less than 2.5Mpa through overtesting, leave safety coefficient.When
When binding material meets that this is required, even if by too high load between different beam slabs, cutting with scissors the bonding at seam will not also break
Bad, opposite destruction occurs in beam slab concrete on the contrary.Therefore, it greatly improves the globality between beam slab.2) in addition,
Found through overtesting, when elastic model amount is more than 1000Mpa, girder steel flexural deformation can be coordinated, otherwise elastic model amount is too small
Girder steel possibly can not be pasted on beam slab, T beams or small box girder, caused both to be partially or wholly separated, can not be played raising beam body
The effect of rigidity.3) consider the needs of working procedure, the setting time after mix be not easy it is too short, otherwise can not be in casting process
In realize best bond performance.4) the problem of considering efficiency of construction, the adhesion strength within 6 hours should be above standard intensity
Half, otherwise long the time required to it, the operation for influenceing bridge is open to traffic.
Further, described high-strength binding material is epoxy resin mortar or MPC composites.Two kinds of materials can be preferable
Ground is applied to the reinforcing of bridge, and easy for construction.
Preferably, described Two bors d's oeuveres channel-section steel is welded into an entirety using two hot-rolled steel channels with upper lower steel plate, pass through
The beam slab hinge seam lower section that connecting screw is fixed between two bent caps, and the upper steel plate of Two bors d's oeuveres channel-section steel is extended over above bent cap
Hinge seam；Two bors d's oeuveres channel-section steel or H profile steel beam meet following condition：1) top flange width bonded with beam bottom plate is not less than 150mm, and height is not
Less than 150mm, thickness of slab is no less than 6mm；2) Q345 or Q235 steel is used；3) weathering steel, carbon steel and low-alloy high-strength are used
Steel；4) upper surface of girder steel top flange, factory's ball blast Sa2.5 levels, if scene finds to get rusty, manual ball blast is answered to St3.0 levels.Throw
The effect of ball is to increase the adhesion strength of binding material.
Further, when described Two bors d's oeuveres channel-section steel or H profile steel beam use carbon steel or Hi-Stren steel, except top flange
Outside, long-term effect anticorrosive coating all should be used, otherwise easily causes remainder corrosion, influences the rigidity of girder steel, ultimately result in bridge
Beam reinforcement performance is decayed.
Preferably, described connecting screw uses Ribbed Bar, reinforcing bar grade is not less than HRBF400, and bar diameter is not
Less than 16mm, spacing is not more than 0.5m.
Preferably, described U-shaped steel plate hoop meets following require：1) it is welded using steel plate, steel plate thickness is not small
In 6mm；2) Q345 or Q235 steel is used；Both 3) weathering steel, carbon steel or Hi-Stren steel can be used, after use
When, exposed face all should use long-acting type anticorrosive coating；4) meet and wrap up diaphragm outer surface at diaphragm after steel plate bending, and use anchor
Bolt is fixed；5) U-shaped steel plate hoop inner surface, factory's ball blast Sa2.5 levels, if scene finds to get rusty, manual ball blast is answered to St3.0 levels.
Preferably, described Screw arbor with nut at both-ends meets following require：Using Ribbed Bar, reinforcing bar grade is not less than
HRBF400, bar diameter are not less than 16mm, and spacing is 0.5m~1.0m.
Preferably, described U-shaped steel plate hoop by segmental hoisting it is in place after, then weld integral.The method is to be directed to U
Shape steel plate hoop weight is excessive, lifting is difficult situation and it is improved, U-shaped steel plate hoop can be split as suitably lifting some
Piece, then lift, be welded and fixed after finally in place successively.
Preferably, described U-shaped steel plate hoop extends to the top plate lower position of T beams or small box girder, and U-shaped steel plate hoop with
The full high-strength binding material of pressure injection between top plate.When burnt area is smaller, cause damage not serious on the top plate of T beams or small box girder
When, only the concrete of its loose peeling can be cut, finally exfoliation is repaiied with polymer mending mortar again
It is multiple.When top plate damage exceedes to a certain degree, then need to continue to extend by the U-shaped steel plate hoop for having covered web, further bag
Top plate bottom, then the full high-strength binding material of pressure injection are wrapped up in, improves globality.
The reinforcement means of the present invention can greatly improve the vertical rigidity and globality of fired damage bridge, recover bridge as early as possible
The operation bearing capacity of beam.Meanwhile unsupported reinforced construction method, both solved such bridge vertical rigidity and horizontal globality
Insufficient problem, solving again can not staking or the very high problem of staking cost below bridge.Meanwhile taken with process is reinforced
The advantages that short, easy for construction.
Brief description of the drawings
Fig. 1 is by fired damage cored slab Scheme of Strengthening cross-sectional view in the present invention；
Fig. 2 in the present invention by fired damage cored slab Scheme of Strengthening elevation (dimensional units in figure：Centimetre)；
Fig. 3 is by fired damage T beam Scheme of Strengthening cross-sectional views in the present invention；
Fig. 4 is by fired damage small box girder Scheme of Strengthening cross-sectional view in the present invention；
Fig. 5 is by fired damage T beams (or small box girder) Scheme of Strengthening elevation (dimensional units in the present invention：Centimetre).
Embodiment
The present invention is further elaborated and illustrated with reference to the accompanying drawings and detailed description.In present embodiment
Provide a kind of preferably by the reinforcement means of fired damage bridge.But following each technical characteristics are not conflicting
Under the premise of, it can carry out respective combination.
In the present embodiment, bridge to be reinforced is that hollow slab girder or T beams or small box girder set up and formed.Bridge bottom is by fire
Burn, cause bottom plate or the web of T beams or small box girder, the bottom plate and top plate of hollow slab girder to receive different degrees of damage.Adopt
It is reinforced with the reinforcement means of the present invention, it is specific as follows：
1st, component damage degree is assessed
It is first according to《Fire-damaged building structure standard of perfection》Pertinent regulations by the every of concrete component is burnt to damaging
Wound is analyzed, and mainly includes the degree of injury of concrete material, the degree of injury of reinforcing bar and presstressed reinforcing steel mechanical property, reinforcing bar
With the degree of injury of Concrete Bond Strength etc., then it is inferred to element bearing capacity percent loss.The each structure of fire axle casing
The drag computational methods of part are identical with former design and calculation method, and simply material parameter is varied from, reinforcing bar and concrete strength
Reduce, the reduction of the element bearing capacity in turn resulted in.
2nd, the necessity that economic judgement is reinforced
After the theoretical analysis, if element bearing capacity have lost 20%~30%, this method can be used to carry out consolidation process；
If bearing capacity loss exceeds 30%, changing beam slab may be more economical reliable.
3rd, consolidation process
(1) hollow slab girder
1.1 remove deck paving, cut beam slab hinge and stitch and strengthened using bar planting；Increase bar planting to adapt to high-strength bonding
Material (uses MPC composites) in the present embodiment, prevent from ftractureing, and increases the synergy between veneer, and it is overall to improve bridge
Bearing capacity.
1.2 remove mode to being cut by the concrete loosely peeled off below fiery hollow slab girder using artificial chisel, using height
Pressure hydraulic giant is cleaned beam panel surface concrete, and the reinforcing bar of corrosion is derusted, cleaned, then reinforcing bar is made at antirust
Reason.
1.3 hollow slab girders hinge seam both ends erect hanging device, and lifting rope through after cutting with scissors seam, (also may be used by both ends lifting Two bors d's oeuveres channel-section steel
Using H profile steel beam) it is in place to hinge seam underface, connecting screw is then connected to Two bors d's oeuveres channel-section steel top flange through hinge seam, connected
One piece of upper steel plate is may pass through above screw rod, then tightens fixation with nut.Before the high-strength binding material poured is stable, even
Interim fixation can be played by connecing screw rod.In addition, it is necessary to paste two bar shaped catch on Two bors d's oeuveres channel-section steel top flange, catch can use
Rubber strip etc..Bar shaped catch is set in the same direction with Two bors d's oeuveres channel-section steel girder steel.Connecting screw position and height are adjusted, makes bar shaped catch top
Contact beam slab ground, form accommodating cavity between Two bors d's oeuveres channel-section steel top flange, bar shaped catch and beam slab bottom surface with hinged seam, can lead to
Cross hinge seam infusion and binding material into the cavity.Two bors d's oeuveres channel-section steel is mainly arranged at the hinge seam lower section between two bent caps, plays anti-
Curved effect.Stitch, found in practice of construction, gap is too small between bent cap and beam slab herein, it is difficult to set for the hinge above bent cap
Girder steel is put, and mainly plays shearing resistance effect, Hollow screws disclosure satisfy that bending resistance requirement due to being supported by bent cap herein.Therefore,
Construction method at this is that steel plate is hung between bent cap and Hollow screws, and steel plate bottom can be supported with backing plate, Ran Hougang
Plate is fixed by connecting screw.Steel plate top also can set two bar shaped catch as girder steel, be formed and girder steel top
The cavity that is connected of accommodating cavity, can integrated poured binding material in the lump.Steel plate can not also be used and is separately provided, and only be prolonged
Realize the Two bors d's oeuveres channel-section steel top flange stretched.Bridge hollow board structure after reinforcing is as shown in Fig. 1~2.
1.4 pour MPC composites into beam slab hinge seam, make that it fills up described accommodating cavity and hinge is stitched, by beam slab and
Girder steel bonding is integral, plays common stress deformation effect.
1.5 other positions for being cut concrete are repaired using polymer mending mortar to exfoliation, are had by specification
Close and require to perform.
1.6 rebuild deck paving.
The footing healths such as 1.7 deck pavings, hinge seam 24 days.
1.8 are open to traffic transportation monitoring with feeding back.
(2) T beams
2.1 remove mode to being cut by the concrete loosely peeled off below fiery T beams using artificial chisel, using giant
Beam panel surface concrete is cleaned, and the reinforcing bar of corrosion is derusted, cleaned, then antirust treatment is made to reinforcing bar.
2.2 are punchinged in the wet seam crossing of floorings, erect simple and easy hoisting equipment, and the hole that lifting rope is dug out by wet seam crossing is hung
It is in place to fill U-shaped steel plate hoop, then connects Screw arbor with nut at both-ends；Because U-shaped steel plate hoop weight is larger, integral hoisting is difficult, therefore passes through
Some pieces are divided into, after lifting is in place successively, then is welded integral.Further, since cored slab bottom plate also receives damage, because
This extends to U-shaped steel plate hoop the top plate lower position of T beams or small box girder, i.e., upper steel plate will be also fixed on bottom plate, then in U-shaped
Pressure injection expires high-strength binding material in the lump between steel plate hoop and top plate.
2.3, to full high-strength binding material MPC of pressure injection between T beams and U-shaped steel plate hoop etc., are bonded into T beams and U-shaped steel plate hoop
It is overall, play common stress deformation effect.
The concrete that 2.4 other positions are peeled off using high-strength fast cohesion compound mending mortar reparation, by the relevant requirement of specification
Perform.
2.5 repair the wet seam hole of floorings and deck paving；T girder constructions after reinforcing are as shown in Figures 3 and 5.
2.6 repair and footing health 24 days.
2.7 are open to traffic transportation monitoring with feeding back.
(3) small box girder
3.1 remove mode to being cut by the concrete loosely peeled off below fiery small box girder using artificial chisel, using high pressure
Hydraulic giant is cleaned beam panel surface concrete, and the reinforcing bar of corrosion is derusted, cleaned, then makees antirust treatment to reinforcing bar.
3.2 are punchinged in the wet seam crossing of floorings, and hanging device is erected above small box girder, and lifting rope is dug out by wet seam crossing
Hole lifting U-shaped steel plate hoop it is in place, make U-shaped steel plate hoop covering small box girder whole bottom plate and web, then connect to draw spiral shell
U-shaped steel plate hoop is fixed on small box girder by bar.
3.3 (can certainly use to the full high-strength binding material epoxy resin mortar of pressure injection between small box girder and U-shaped steel plate hoop
MPC), it is small box girder and the bonding of U-shaped steel plate hoop is integral, play common stress deformation effect.
The concrete that 3.4 other positions are peeled off using high-strength fast cohesion compound mending mortar reparation, by the relevant requirement of specification
Perform.
3.5 repair the wet seam hole of floorings and deck paving；Small box girder structure after reinforcing is as shown in Figures 4 and 5.
3.6 repair and footing health 24 days.
3.7 are open to traffic transportation monitoring with feeding back.
In above-mentioned construction method, there are strict requirements for the material and parameter of steel plate, binding material and connector,
Need to meet corresponding intensity.It is specific as follows：
The requirement of Two bors d's oeuveres channel-section steel：(1) two hot-rolled steel channels can be used to be welded into an entirety with upper lower steel plate；(2) combine
Top flange width is not less than 150mm in section, and deck-molding is no less than 150mm, and thickness of slab is no less than 6mm；(3) Q345 and Q235 can be used
Steel, preferably Q235；(4) weathering steel, carbon steel and Hi-Stren steel can be used, when after use both when, in addition to top flange,
Long-acting type anticorrosive coating all should be used；(5) upper surface of girder steel top flange, factory's ball blast Sa2.5 levels, if scene finds to get rusty,
Manual ball blast is answered to St3.0 levels.
The requirement of connecting screw：Using Ribbed Bar, reinforcing bar grade is not less than HRBF400, and bar diameter 16mm, spacing is not
More than 0.5m.
The requirement of U-shaped steel plate hoop：(1) it is welded using steel plate, steel plate thickness is not less than 6mm；(2) can use Q345 and
Q235 steel, preferably Q235；(3) weathering steel, carbon steel and Hi-Stren steel can be used, when after use both when, exposed face
Long-acting type anticorrosive coating all should be used；(4) if full wafer u tie lifting weight is larger, sectional processing and fabricating, on-site hoisting is just
Welded behind position integral；(5) meet and wrap up diaphragm outer surface at diaphragm after steel plate bending, and fixed with crab-bolt；(6) U-shaped steel
Plate hoop inner surface, factory's ball blast Sa2.5 levels, if scene finds to get rusty, manual ball blast is answered to St3.0 levels.
The requirement of Screw arbor with nut at both-ends：Using Ribbed Bar, reinforcing bar grade is not less than HRBF400, and bar diameter is not less than 16mm,
Spacing is generally 0.5m~1.0m.
The requirement of high-strength binding material：(1) it is not less than 2.5Mpa with Concrete Bond Strength, and destroys and occur in concrete
It is interior；(2) elastic model amount is more than 1000Mpa；(3) after mixing and stirring, solidification practice is more than half an hour；Bonding within (4) 6 hours is strong
Spend the half for the intensity that is above standard；Such as：Epoxy resin mortar, MPC composites etc..
The performance parameter of above three part is also to realize the crucial Fundamentals for reinforcing axle casing globality, any one
The unqualified globality that may cause bridge of part is damaged or caused potential potential safety hazard.
After being repaired by the above method to bridge, fed back well being open to traffic in transportation monitoring process, bridge is whole
Body is enhanced, and is fully able to satisfaction and is open to traffic condition.
Embodiment described above is a kind of preferable scheme of the present invention, and so it is not intended to limiting the invention.Have
The those of ordinary skill of technical field is closed, without departing from the spirit and scope of the present invention, various changes can also be made
Change and modification.Therefore the technical scheme that all modes for taking equivalent substitution or equivalent transformation are obtained, the guarantor of the present invention is all fallen within
In the range of shield.
Claims (10)
1. a kind of reinforcement means by fired damage bridge, bridge fired damage part is hollow slab girder or T beams or small box girder；
It is characterized in that including：
The reinforcement means of hollow slab girder is：
1.1 remove deck paving, cut beam slab hinge and stitch and strengthened using bar planting；
1.2 use artificial chisel except mode is cut to the concrete loosely peeled off below the hollow slab girder of fired damage, use
Giant is cleaned beam panel surface concrete, and the reinforcing bar of corrosion is derusted, cleaned, then reinforcing bar is made at antirust
Reason；
Beam slab hinge seam both ends between 1.3 two bent caps erect hanging device, and lifting rope stitches lifting H profile steel beam or Two bors d's oeuveres groove by cutting with scissors
Steel is in place, then connecting screw, and two bar shaped catch are pasted on H profile steel beam or Two bors d's oeuveres channel-section steel top flange, make top flange, bar shaped
Accommodating cavity is formed between catch and beam slab bottom surface with hinged seam；Meanwhile fixation steel plate at the hinge seam above bent cap；
1.4 pour high-strength binding material into beam slab hinge seam, high-strength binding material is filled up described accommodating cavity and is cut with scissors and stitch, will
Beam slab and girder steel bonding are integral, play common stress deformation effect；
Exfoliation is repaired using polymer mending mortar at 1.5 other positions for being cut concrete；
The reinforcement means of T beams is：
2.1 use artificial chisel except mode is cut to the concrete loosely peeled off below the T beams of fired damage, using water under high pressure
Rifle is cleaned beam panel surface concrete, and the reinforcing bar of corrosion is derusted, cleaned, then makees antirust treatment to reinforcing bar；
2.2 are punchinged in the wet seam crossing of floorings, and hanging device is erected above T beams, and the hole that lifting rope is dug out by wet seam crossing is hung
Dress U-shaped steel plate hoop is in place, makes the whole bottom plate and web of U-shaped steel plate hoop covering T beams, then connects Screw arbor with nut at both-ends by U-shaped steel plate
Hoop is fixed on T beams；
2.3 expire high-strength binding material to pressure injection between T beams and U-shaped steel plate hoop, and T beams and the bonding of U-shaped steel plate hoop is integral, play
Common stress deformation effect；
Exfoliation is repaired using polymer mending mortar at 2.4 other positions for being cut concrete；
The reinforcement means of small box girder is：
3.1 use artificial chisel except mode is cut to the concrete loosely peeled off below the small box girder of fired damage, using height
Pressure hydraulic giant is cleaned beam panel surface concrete, and the reinforcing bar of corrosion is derusted, cleaned, then reinforcing bar is made at antirust
Reason；
3.2 are punchinged in the wet seam crossing of floorings, and hanging device, the hole that lifting rope is dug out by wet seam crossing are erected above small box girder
Hole lifting U-shaped steel plate hoop is in place, makes the whole bottom plate and web of U-shaped steel plate hoop covering small box girder, then connects Screw arbor with nut at both-ends by U
Shape steel plate hoop is fixed on small box girder；
3.3, to the full high-strength binding material of pressure injection between small box girder and U-shaped steel plate hoop, small box girder and U-shaped steel plate hoop are bonded into whole
Body, play common stress deformation effect；
Exfoliation is repaired using polymer mending mortar at 3.4 other positions for being cut concrete.
2. as claimed in claim 1 by the reinforcement means of fired damage bridge, it is characterised in that described high-strength cohesive material
Material should meet to require as follows：1）It is not less than 2.5Mpa with Concrete Bond Strength；2）Elastic model amount is more than 1000Mpa；3）Mix
With it is rear, setting time is more than half an hour；4）Adhesion strength within 6 hours is above standard the half of intensity.
3. as claimed in claim 2 by the reinforcement means of fired damage bridge, it is characterised in that described high-strength cohesive material
Expect for epoxy resin mortar or MPC composites.
4. as claimed in claim 1 by the reinforcement means of fired damage bridge, it is characterised in that described Two bors d's oeuveres channel-section steel is adopted
Be welded into an entirety with the upper lower steel plate of two hot-rolled steel channels and Two bors d's oeuveres channel-section steel, by connecting screw be fixed on two bent caps it
Between beam slab hinge seam lower section, and the upper steel plate of Two bors d's oeuveres channel-section steel extend over above bent cap hinge seam；Two bors d's oeuveres channel-section steel or H profile steel beam are expired
The following condition of foot：1）The top flange width bonded with beam bottom plate is not less than 150mm, and height is no less than 150mm, and thickness of slab is no less than 6mm；
2）Using Q345 or Q235 steel；3）Using weathering steel, carbon steel and Hi-Stren steel；4）The upper surface of girder steel top flange,
Factory's ball blast Sa2.5 levels, if scene finds to get rusty, manual ball blast is answered to St3.0 levels.
5. as claimed in claim 4 by the reinforcement means of fired damage bridge, it is characterised in that described Two bors d's oeuveres channel-section steel or
When H profile steel beam uses carbon steel or Hi-Stren steel, in addition to top flange, long-term effect anticorrosive coating all should be used.
6. as claimed in claim 1 by the reinforcement means of fired damage bridge, it is characterised in that described connecting screw is adopted
With Ribbed Bar, reinforcing bar grade is not less than HRBF400, and bar diameter is not less than 16mm, and spacing is not more than 0.5m.
7. as claimed in claim 1 by the reinforcement means of fired damage bridge, it is characterised in that described U-shaped steel plate hoop
Meet following require：1）It is welded using steel plate, steel plate thickness is not less than 6mm；2）Using Q345 or Q235 steel；3）It can use
Weathering steel, carbon steel or Hi-Stren steel, when after use both when, exposed face all should use long-acting type anticorrosive coating；4）
Meet and wrap up diaphragm outer surface at diaphragm after steel plate bending, and fixed with crab-bolt；5）U-shaped steel plate hoop inner surface, factory's ball blast
Sa2.5 levels, if scene finds to get rusty, manual ball blast is answered to St3.0 levels.
8. as claimed in claim 1 by the reinforcement means of fired damage bridge, it is characterised in that described Screw arbor with nut at both-ends is expired
Foot is following to be required：Using Ribbed Bar, reinforcing bar grade is not less than HRBF400, and bar diameter is not less than 16mm, spacing be 0.5m~
1.0m。
9. as claimed in claim 1 by the reinforcement means of fired damage bridge, it is characterised in that described U-shaped steel plate hoop
By segmental hoisting it is in place after, then weld integral.
10. as claimed in claim 1 by the reinforcement means of fired damage bridge, it is characterised in that described U-shaped steel plate hoop
Extend to the top plate lower position of T beams or small box girder, and the full high-strength binding material of pressure injection between U-shaped steel plate hoop and top plate.
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| CN201610654143.3A CN106223212B (en) | 2016-08-11 | 2016-08-11 | A kind of reinforcement means by fired damage bridge |
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| CN201610654143.3A CN106223212B (en) | 2016-08-11 | 2016-08-11 | A kind of reinforcement means by fired damage bridge |
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| CN106223212B true CN106223212B (en) | 2017-12-15 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988203B (en) * | 2017-05-19 | 2020-02-07 | 重庆工商职业学院 | Concrete hollow slab bridge with transversely reinforced bridge deck pavement layer |
| CN109594484A (en) * | 2017-09-30 | 2019-04-09 | 郑州市交通规划勘察设计研究院 | Bridge strengthening device, ruggedized construction, reinforced construction method and reinforcement and repair method |
| CN107620263B (en) * | 2017-10-26 | 2023-05-26 | 南京林业大学 | Reinforcing method for reinforcing bridge transverse connection |
| CN108547222A (en) * | 2018-04-24 | 2018-09-18 | 上海申继交通科技有限公司 | The reparation structure and its construction method of a kind of hollow slab girder bridge floor system damage |
| CN108755459A (en) * | 2018-08-10 | 2018-11-06 | 山东交通学院 | A kind of compound anti-bend reinforced construction of old Hollow Slab Beam Bridge steel wire rope MPC and construction method |
| CN109468965B (en) * | 2018-12-04 | 2024-05-17 | 浙江交通职业技术学院 | Concrete bridge reinforcing device and reinforcing method for fire damage |
| CN109989359A (en) * | 2019-03-08 | 2019-07-09 | 苏交科集团股份有限公司 | A kind of hollow slab girder reinforcement means and structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001064916A (en) * | 1999-08-31 | 2001-03-13 | Kyobashi Kogyo Kk | Reinforcement of bridge including joint |
| KR20050054406A (en) * | 2003-12-04 | 2005-06-10 | 이창남 | Strengthening method of continuous girder and beam applying post tensioning |
| CN203007819U (en) * | 2013-01-20 | 2013-06-19 | 青岛理工大学 | Assembled plate girder bridge hinge joint reinforcing opposite-pulling device |
| CN203361030U (en) * | 2013-06-25 | 2013-12-25 | 西安公路研究院 | Box beam or T-shaped beam reinforcing structure combining unbonded pre-stress and steel plate concrete |
| CN103898841A (en) * | 2014-04-23 | 2014-07-02 | 魏志新 | Hollow slab bridge reinforcing method |
| CN204023425U (en) * | 2014-09-25 | 2014-12-17 | 广东工业大学 | The U-shaped hoop reinforcing construction of T-shaped beam bridge steel plate |
-
2016
- 2016-08-11 CN CN201610654143.3A patent/CN106223212B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001064916A (en) * | 1999-08-31 | 2001-03-13 | Kyobashi Kogyo Kk | Reinforcement of bridge including joint |
| KR20050054406A (en) * | 2003-12-04 | 2005-06-10 | 이창남 | Strengthening method of continuous girder and beam applying post tensioning |
| CN203007819U (en) * | 2013-01-20 | 2013-06-19 | 青岛理工大学 | Assembled plate girder bridge hinge joint reinforcing opposite-pulling device |
| CN203361030U (en) * | 2013-06-25 | 2013-12-25 | 西安公路研究院 | Box beam or T-shaped beam reinforcing structure combining unbonded pre-stress and steel plate concrete |
| CN103898841A (en) * | 2014-04-23 | 2014-07-02 | 魏志新 | Hollow slab bridge reinforcing method |
| CN204023425U (en) * | 2014-09-25 | 2014-12-17 | 广东工业大学 | The U-shaped hoop reinforcing construction of T-shaped beam bridge steel plate |
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| CN106223212A (en) | 2016-12-14 |
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