CN106223212A - A kind of reinforcement means suffering fired damage bridge - Google Patents
A kind of reinforcement means suffering fired damage bridge Download PDFInfo
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- CN106223212A CN106223212A CN201610654143.3A CN201610654143A CN106223212A CN 106223212 A CN106223212 A CN 106223212A CN 201610654143 A CN201610654143 A CN 201610654143A CN 106223212 A CN106223212 A CN 106223212A
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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 suffering fired damage bridge, belong to construction method field.The hollow slab girder of the method bridge fired damage or T beam or small box girder, use artificial chisel to cut the concrete of loose peeling below the hollow slab girder of fired damage or T beam or small box girder except mode, use giant to be rinsed well by beam slab lower surface concrete；Lift steel plate or girder steel again, pour high-strength binding material simultaneously, its damage location is strengthened.The reinforcement means of the present invention can be greatly improved vertical rigidity and the globality of fired damage bridge, recovers the operation bearing capacity of bridge as early as possible.Meanwhile, unsupported reinforced construction method, both solved such bridge vertical rigidity and horizontal globality deficiency problem, solving again cannot staking or the highest problem of staking cost below bridge.Meanwhile, there is the advantages such as reinforcing the shortest, the easy construction of operation.
Description
Technical field
The invention belongs to construction method field, be specifically related to a kind of reinforcement means suffering 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 thing causes fire more due to influence factor, it is difficult to controls, also gradually increased by the number of times of fire.Fire not only causes
Serious economic loss, and the reinforced concrete structure of bridge is under the physics and chemical action of fire, its intensity and springform
The mechanical properties such as amount will go down, and adhesion strength between reinforcing bar to concrete is corresponding to be declined, and the section bearing capacity of bridge also can reduce,
Cause bridge security hidden danger, and then affect highway operation safety.Therefore, it is necessary to quickly the degree of injury of bridge structure is just made
True judgement, and then take scientific and reasonable restoring and fastening method, recovering as early as possible to be open to traffic, the loss caused by fire drops to
Minimum, it is current urgent problem." research of steel plate concrete composite reinforcement method test and practical application of bridge " (Shi Xiong
Big, 2012) disclose a kind of bridge reinforcing method that overdoes commonly used in the prior art, predominantly: to burning critical regions beam body
Using composite reinforcement, general area beam body uses affixing steel plate reinforcement.Utilize reinforcing bar by Interal fixation on cored slab, exist simultaneously
Air-free concrete is used to be filled with between cored slab and steel plate.The method can actually play the effect of reinforcing in theory, but
It is that applicant studies discovery, in actual use, on the one hand only covers the base plate overdoed and part abdomen due to its steel plate
Plate, during follow-up use, load can gradually concentrate at the unlapped web of steel plate, pacifies the structure of this subregion
Entirely cause a hidden trouble；On the other hand, its steel plate uses reinforcing bar to implant beam body and is fixed, and this can weaken the bending rigidity of beam, impact
Its bearing capacity.Meanwhile, using air-free concrete to be filled with, the adhesive property between itself and original concrete, steel plate is not enough,
Easily lead to come off.Further, above-mentioned construction method needs to lay support, the most time-consumingly, affects operation and is open to traffic speed,
Also the area having the erection bracket such as current demand difficult it is not used under bridge.Therefore, await providing one preferably to suffer
The reinforcement means of fired damage bridge.
Summary of the invention
It is an object of the invention to solve problems of the prior art, and a kind of fired damage bridge of suffering is provided
Reinforcement means, it is possible to make bridge recover as early as possible to be open to traffic in the case of ensureing bridge structure safe.
The technical solution adopted in the present invention is as follows:
Suffer the reinforcement means of fired damage bridge, be directed to bridge fired damage parts be hollow slab girder or T beam or
One of small box girder.The reinforcement means main purpose of the present invention is to improve the bridge vertical rigidity after reinforcing and globality, reduces lotus
Carry the difference of cross direction profiles ratio and design, improve the bearing capacity of bridge.
The reinforcement means of hollow slab girder is:
1.1 remove deck paving, cut beam slab hinge seam and use bar planting to strengthen；
1.2 use artificial chisel to cut the concrete of peeling loose below the hollow slab girder of fired damage except mode,
Use giant to be carried out by beam panel surface concrete, and the reinforcing bar of corrosion is eliminated rust, cleans, then reinforcing bar is prevented
Rust processes；
Article 1.3 two, the beam slab hinge seam two ends between bent cap erect hanging device, and lifting rope is by hinge seam lifting H profile steel beam or double
Spelling channel-section steel is in place, then connects screw rod, pastes two bar shaped catch, make on H profile steel beam or Two bors d's oeuveres channel-section steel top flange
The edge of a wing, bar shaped catch and with between the beam slab bottom surface of hinged seam formed accommodate cavity；Meanwhile, fix at the hinge seam above bent cap
Steel plate.This steel plate plays and seals the effect cutting with scissors seam above bent cap, and it can be separately provided and the top flange of girder steel can also be used to prolong
Stretch realization；
1.4 pour high-strength binding material in beam slab hinge seam, make high-strength binding material fill up described receiving cavity and hinge
Seam, is bonded into entirety by beam slab and girder steel, plays common stress deformation effect；
1.5 other by cut concrete position use polymer mending mortar exfoliation is repaired；
The reinforcement means of T beam is:
2.1 use artificial chisel to cut the concrete of loose peeling below the T beam of fired damage except mode, use height
Beam panel surface concrete is carried out by setting-out rifle, and the reinforcing bar of corrosion is eliminated rust, cleaned, then reinforcing bar is made antirust place
Reason；
2.2 punching at the wet seam crossing of floorings, erect hanging device, the hole that lifting rope is dug out by wet seam crossing above T beam
Hole lifting U-shaped steel plate hoop is in place, makes U-shaped steel plate hoop cover whole base plate and the web of T beam, then connects Screw arbor with nut at both-ends by U-shaped
Steel plate hoop is fixed on T beam；
T beam and U-shaped steel plate hoop, to the full high-strength binding material of pressure injection between T beam and U-shaped steel plate hoop, are bonded into entirety by 2.3,
Play common stress deformation effect；
2.4 other by cut concrete position use polymer mending mortar exfoliation is repaired；
The reinforcement means of small box girder is:
3.1 use artificial chisel to cut the concrete of peeling loose below the small box girder of fired damage except mode, adopt
With giant, beam panel surface concrete is carried out, and the reinforcing bar of corrosion is eliminated rust, cleans, then reinforcing bar is made antirust
Process；
3.2 punching at the wet seam crossing of floorings, erect hanging device above small box girder, and lifting rope is dug out by wet seam crossing
Hole lifting U-shaped steel plate hoop in place, make U-shaped steel plate hoop cover the whole base plate of small box girder and web, then connect drawing spiral shell
U-shaped steel plate hoop is fixed on small box girder by bar；
Small box girder and U-shaped steel plate hoop, to the full high-strength binding material of pressure injection between small box girder and U-shaped steel plate hoop, are bonded by 3.3
Integral, play common stress deformation effect；
3.4 other by cut concrete position use polymer mending mortar exfoliation is repaired.
Heretofore described U-shaped steel plate hoop refers to the structure with the generally U-shaped of Plate Welding or matrix.
In above-mentioned reinforcing process, it is necessary first to the concrete of peeling loose below the hollow slab girder of fired damage is dug
Remove.If not carrying out cutting directly reparation, easily making this part come off during follow-up use, affecting globality.Further,
Beam slab hinge seam, T beam or the base plate of small box girder and web carried out steel plate/strengthening of steel bridge, to irrigate the high-strength bonding materials such as MPC simultaneously
Material, makes steel plate/girder steel, binding material and original beam body form an entirety, common stress deformation, prevents excessive load from gathering
Combine in a certain fragile position, cause potential safety hazard.Further, in the present invention, construction to hollow slab girder have employed without support side
Formula, i.e. directly sets up hanging device, is winched to by girder steel bottom beam slab, stitch infusion and binding material wherein by hinge at two ends.Should
Method can be greatly improved the construction convenience having the unsuitable erection bracket areas such as current demand under bridge.
As preferably, described high-strength binding material should meet following requirement: 1) 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, one be improve between different hollow slab girder, T beam or the globality structural strength of small box girder；Two is by Two bors d's oeuveres groove
Steel or H profile steel beam are bonded in bottom hollow slab girder and T beam or small box girder cladding plate side.1) general concrete breaking resistance is
2Mpa, therefore, Concrete Bond Strength should be not less than 2Mpa, is preferably not less than 2.5Mpa through overtesting, leaves safety coefficient.When
Binding material meet this when requiring, even if by too high load between different beam slab, the bonding at hinge seam also will not be broken
Bad, contrary destruction occurs on the contrary in beam slab concrete.Therefore, it greatly improves the globality between beam slab.2) it addition,
Finding through overtesting, when elastic model amount is more than 1000Mpa, can coordinate girder steel flexural deformation, otherwise elastic model amount is the least
Girder steel possibly cannot be pasted on beam slab, T beam or small box girder, causes both to be partially or wholly separated, it is impossible to play raising beam body
The effect of rigidity.3) in view of the needs of working procedure, the setting time after mix is difficult to too short, otherwise cannot be at casting process
In realize best bond performance.4) in view of the problem of efficiency of construction, the adhesion strength within 6 hours should be above standard intensity
Half, otherwise its required time is long, and the operation affecting bridge is open to traffic.
Further, described high-strength binding material is epoxy resin mortar or MPC composite.This bi-material can be preferable
Be applied to the reinforcing of bridge, and easy construction.
As preferably, described Two bors d's oeuveres channel-section steel uses two hot-rolled steel channels to become an entirety with upper and lower Plate Welding, passes through
Connect below the beam slab hinge seam that screw rod is fixed between two bent caps, and the upper steel plate of Two bors d's oeuveres channel-section steel extends over above bent cap
Hinge seam；Two bors d's oeuveres channel-section steel or H profile steel beam meet following condition: 1) with the top flange width of beam base plate bonding not less than 150mm, 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 level, if on-the-spot discovery is got rusty, should manual ball blast to St3.0 level.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
Outward, long-lasting anticorrosive coating all should be used, be otherwise easily caused remainder corrosion, affect the rigidity of girder steel, ultimately result in bridge
Beam reinforcement performance is decayed.
As preferably, described connection screw rod uses Ribbed Bar, and reinforcing bar grade is not less than HRBF400, and bar diameter is not
Less than 16mm, spacing is not more than 0.5m.
As preferably, described U-shaped steel plate hoop is satisfied to be required as follows: 1) using Plate Welding to form, steel plate thickness is the least
In 6mm；2) Q345 or Q235 steel is used；3) weathering steel, carbon steel or Hi-Stren steel can be used, both after using
Time, exposed face all should use long-acting type anticorrosive coating；(4) meet and at diaphragm, after steel plate bending, wrap up diaphragm outer surface, and use
Crab-bolt is fixed；(5) U-shaped steel plate hoop inner surface, factory's ball blast Sa2.5 level, if on-the-spot discovery is got rusty, should manual ball blast to St3.0
Level.
As preferably, described Screw arbor with nut at both-ends meets following requirement: using Ribbed Bar, reinforcing bar grade is not less than
HRBF400, bar diameter is not less than 16mm, and spacing is 0.5m～1.0m.
As preferably, described U-shaped steel plate hoop by segmental hoisting in place after, then be welded into entirety.The method is for U
Shape steel plate hoop weight is excessive, the situation of lifting difficulty and improve, can be split as U-shaped steel plate hoop suitably lifting is some
Sheet, lifts the most successively, the most in place after be welded and fixed.
As preferably, described U-shaped steel plate hoop extends to the top board lower position of T beam or small box girder, and U-shaped steel plate hoop with
The full high-strength binding material of pressure injection between top board.When burnt area is less, cause damage the most serious on the top board of T beam or small box girder
Time, only the concrete of its loose peeling can be cut, with polymer mending mortar, exfoliation be repaiied the most again
Multiple.When top board damage exceed to a certain degree time, then need by cover web U-shaped steel plate hoop continue extend, wrap further
Wrap up in top board bottom, the fuller high-strength binding material of pressure injection, improve globality.
The reinforcement means of the present invention can be greatly improved vertical rigidity and the globality of fired damage bridge, recovers 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
Not enough problem, solving again cannot staking or the highest problem of staking cost below bridge.Meanwhile, there is reinforcing operation time-consuming
The advantages such as short, easy construction.
Accompanying drawing explanation
Fig. 1 is to suffer fired damage cored slab Scheme of Strengthening cross-sectional view in the present invention；
Fig. 2 is to suffer fired damage cored slab Scheme of Strengthening elevation (in figure dimensional units: centimetre) in the present invention；
Fig. 3 is to suffer fired damage T beam Scheme of Strengthening cross-sectional view in the present invention；
Fig. 4 is to suffer fired damage small box girder Scheme of Strengthening cross-sectional view in the present invention；
Fig. 5 is to suffer fired damage T beam (or small box girder) Scheme of Strengthening elevation (dimensional units: centimetre) in the present invention.
Detailed description of the invention
With detailed description of the invention the present invention it is further elaborated below in conjunction with the accompanying drawings and illustrates.In this detailed description of the invention
Provide a kind of reinforcement means preferably suffering fired damage bridge.But each technical characteristic following is the most conflicting
Under premise, all can carry out respective combination.
In the present embodiment, bridge to be reinforced is hollow slab girder or T beam or small box girder sets up and forms.Bridge bottom suffers fire
Burn, cause the base plate of hollow slab girder or T beam or the web of small box girder, base plate and top board all to receive damage in various degree.Adopt
With the reinforcement means of the present invention, it is reinforced, specific as follows:
1, assessment component damage degree
It is first according to " fire-damaged building structure standard of perfection " pertinent regulations every damage to suffering to burn concrete component
Wound is analyzed, and mainly includes the degree of injury of concrete material, reinforcing bar and the degree of injury of presstressed reinforcing steel mechanical property, reinforcing bar
With the degree of injury etc. of Concrete Bond Strength, then infer element bearing capacity percent loss.Each structure of concrete on fire bridge
The drag computational methods of part are identical with original design computational methods, and simply material parameter is varied from, reinforcing bar and concrete strength
Reduce, the reduction of the element bearing capacity in turn resulted in.
2, 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 is beyond 30%, change beam slab possibility more economical reliably.
3, consolidation process
(1) hollow slab girder
1.1 remove deck paving, cut beam slab hinge seam and use bar planting to strengthen；Increase bar planting to adapt to high-strength bonding
Material (uses MPC composite) in the present embodiment, prevent cracking, increase the synergism between veneer, improve bridge overall
Bearing capacity.
1.2 use artificial chisel to cut by the concrete of loose peeling below fire hollow slab girder except mode, use height
Beam panel surface concrete is carried out by setting-out rifle, and the reinforcing bar of corrosion is eliminated rust, cleaned, then reinforcing bar is made antirust place
Reason.
1.3 hollow slab girder hinge seam two ends erect hanging device, and after lifting rope passes hinge seam, two ends lifting Two bors d's oeuveres channel-section steel (also may be used
Use H profile steel beam) in place to cutting with scissors immediately below seam, then connection screw rod is connected to Two bors d's oeuveres channel-section steel top flange through hinge seam, connects
The top of screw rod may pass through one piece of upper steel plate, then fixes with nut screwing clamping.Before the high-strength binding material poured is stable, even
Connect screw rod and can play interim fixation.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 arranged in the same direction with Two bors d's oeuveres channel-section steel girder steel.Adjust and connect screw position and height, make bar shaped catch top
Contact beam slab ground, Two bors d's oeuveres channel-section steel top flange, bar shaped catch and with between the beam slab bottom surface of hinged seam formed accommodate cavity, can lead to
Cross hinge seam infusion and binding material in this cavity.Below Two bors d's oeuveres channel-section steel principal set up hinge seam between two bent caps, play anti-
Curved effect.Stitching for the hinge above bent cap, find in practice of construction, between bent cap and beam slab, gap is too small herein, is difficult to set
Putting girder steel, and herein owing to being supported by bent cap, act primarily as shearing resistance effect, Hollow screws disclosure satisfy that bending resistance requirement.Therefore,
Construction method at this is, hangs in steel plate between bent cap and Hollow screws, and steel plate bottom can be supported with backing plate, then steel
Plate is fixed by connecting screw rod.Steel plate top also can arrange two bar shaped catch as girder steel, is formed and above girder steel
Accommodate the cavity that is connected of cavity, can the most integrated poured binding material.Steel plate can not also use and be separately provided, and only prolongs
The Two bors d's oeuveres channel-section steel top flange stretched realizes.Bridge hollow board structure after reinforcing is as shown in Fig. 1～2.
1.4 pour MPC composite in beam slab hinge seam so that it is fill up described receiving cavity and hinge seam, by beam slab and
Girder steel is bonded into entirety, plays common stress deformation effect.
1.5 other by cut concrete position use polymer mending mortar exfoliation is repaired, have by specification
Close and require to perform.
1.6 rebuild deck paving.
The footing health preservings such as 1.7 deck pavings, hinge seam 24 days.
1.8 are open to traffic transportation monitoring and feed back.
(2) T beam
2.1 use artificial chisel to cut by the concrete of loose peeling below fire T beam except mode, use giant
Beam panel surface concrete is carried out, and the reinforcing bar of corrosion is eliminated rust, cleans, then reinforcing bar is made antirust treatment.
2.2 punching at 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 hangs
Dress U-shaped steel plate hoop is in place, then connects Screw arbor with nut at both-ends；Owing to U-shaped steel plate hoop weight is relatively big, integral hoisting difficulty, therefore pass through
Be divided into some pieces, lift successively in place after, then be welded into entirety.Further, since cored slab base plate also receives damage, because of
U-shaped steel plate hoop is extended to the top board lower position of T beam or small box girder by this, will also fix upper steel plate, then at U-shaped on base plate
Between steel plate hoop and top board, pressure injection expires high-strength binding material in the lump.
2.3, to the full high-strength binding material MPC of pressure injection between T beam and U-shaped steel plate hoop etc., are bonded into T beam and U-shaped steel plate hoop
Entirety, plays common stress deformation effect.
2.4 other positions use the concrete that high-strength fast cohesion compound mending mortar reparation is peeled off, by the relevant requirement of specification
Perform.
2.5 repair floorings wet seam hole and deck paving；T girder construction after reinforcing is as shown in Figures 3 and 5.
2.6 repair and footing health preserving 24 days.
2.7 are open to traffic transportation monitoring and feed back.
(2) small box girder
3.1 use artificial chisel to cut by the concrete of loose peeling below fire small box girder except mode, use high pressure
Beam panel surface concrete is carried out by hydraulic giant, and the reinforcing bar of corrosion is eliminated rust, cleaned, then reinforcing bar is made antirust treatment.
3.2 punching at the wet seam crossing of floorings, erect hanging device above small box girder, and lifting rope is dug out by wet seam crossing
Hole lifting U-shaped steel plate hoop in place, make U-shaped steel plate hoop cover the whole base plate of small box girder and web, then connect drawing 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), small box girder and U-shaped steel plate hoop are bonded into entirety, play common stress deformation effect.
3.4 other positions use the concrete that high-strength fast cohesion compound mending mortar reparation is peeled off, by the relevant requirement of specification
Perform.
3.5 repair floorings wet seam hole and deck paving；Small box girder structure after reinforcing is as shown in Figures 4 and 5.
3.6 repair and footing health preserving 24 days.
3.7 are open to traffic transportation monitoring and feed back.
In above-mentioned construction method, material and parameter for steel plate, binding material and connector have strict requirements,
Need to meet corresponding intensity.Specific as follows:
The requirement of Two bors d's oeuveres channel-section steel: (1) can use two hot-rolled steel channels to become an entirety with upper and lower Plate Welding；(2) combination
In cross section, top flange width is not less than 150mm, 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 use after both time, 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 level, if on-the-spot discovery is got rusty,
Should manual ball blast to St3.0 level.
Connect the requirement of screw rod: using Ribbed Bar, reinforcing bar grade is not less than HRBF400, bar diameter 16mm, and spacing is not
More than 0.5m.
The requirement of U-shaped steel plate hoop: (1) uses Plate Welding to form, and 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 use after both time, exposed face
Long-acting type anticorrosive coating all should be used；(4) if full wafer u tie lifting weight is relatively big, sectional processing and fabricating, on-site hoisting is just
Entirety it is welded into after Wei；(5) meet and at diaphragm, after steel plate bending, wrap up diaphragm outer surface, and fix by crab-bolt；(6) U-shaped steel
Plate hoop inner surface, factory's ball blast Sa2.5 level, if on-the-spot discovery is got rusty, should manual ball blast to St3.0 level.
The requirement of Screw arbor with nut at both-ends: using Ribbed Bar, reinforcing bar grade is not less than HRBF400, bar diameter is not less than 16mm,
Spacing is generally 0.5m～1.0m.
The requirement of high-strength binding material: (1) and Concrete Bond Strength are not less than 2.5Mpa, and destroy generation at concrete
In；(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 of the intensity that is above standard；Such as: epoxy resin mortar, MPC composite etc..
The performance parameter of above three parts is also the crucial Fundamentals realizing reinforcing axle casing globality, any one
Parts are defective all may be caused the globality of bridge impaired or cause potential potential safety hazard.
After being repaired bridge by said method, during the transportation monitoring that is open to traffic, feedback is good, and bridge is whole
Body is enhanced, and is fully able to meet the condition that is open to traffic.
Embodiment described above is the one preferably scheme of the present invention, and so it is not intended to limiting the invention.Have
Close the those of ordinary skill of technical field, without departing from the spirit and scope of the present invention, it is also possible to make various change
Change and modification.The technical scheme that the most all modes taking equivalent or equivalent transformation are obtained, all falls within the guarantor of the present invention
In the range of protecting.
Claims (10)
1. suffering a reinforcement means for fired damage bridge, bridge fired damage parts is hollow slab girder or T beam 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 seam and use bar planting to strengthen；
1.2 use artificial chisel to cut the concrete of peeling loose below the hollow slab girder of fired damage except mode, use
Beam panel surface concrete is carried out by giant, and the reinforcing bar of corrosion is eliminated rust, cleaned, then reinforcing bar is made antirust place
Reason；
Article 1.3 two, the beam slab hinge seam two ends between bent cap erect hanging device, and lifting rope is by hinge seam lifting H profile steel beam or Two bors d's oeuveres groove
Steel is in place, then connects screw rod, pastes two bar shaped catch, make top flange, bar shaped on H profile steel beam or Two bors d's oeuveres channel-section steel top flange
Catch and with between the beam slab bottom surface of hinged seam formed accommodate cavity；Meanwhile, fixation steel plate at the hinge seam above bent cap；
1.4 pour high-strength binding material in beam slab hinge seam, make high-strength binding material fill up described receiving cavity and hinge seam, will
Beam slab and girder steel are bonded into entirety, play common stress deformation effect；
1.5 other by cut concrete position use polymer mending mortar exfoliation is repaired；
The reinforcement means of T beam is:
2.1 use artificial chisel to cut the concrete of loose peeling below the T beam of fired damage except mode, use water under high pressure
Beam panel surface concrete is carried out by rifle, and the reinforcing bar of corrosion is eliminated rust, cleaned, then reinforcing bar is made antirust treatment；
2.2 punching at the wet seam crossing of floorings, erect hanging device above T beam, and the hole that lifting rope is dug out by wet seam crossing hangs
Dress U-shaped steel plate hoop is in place, makes U-shaped steel plate hoop cover whole base plate and the web of T beam, then connects Screw arbor with nut at both-ends by U-shaped steel plate
Hoop is fixed on T beam；
T beam and U-shaped steel plate hoop, to the full high-strength binding material of pressure injection between T beam and U-shaped steel plate hoop, are bonded into entirety, play by 2.3
Common stress deformation effect；
2.4 other by cut concrete position use polymer mending mortar exfoliation is repaired；
The reinforcement means of small box girder is:
3.1 use artificial chisel to cut the concrete of peeling loose below the small box girder of fired damage except mode, use height
Beam panel surface concrete is carried out by setting-out rifle, and the reinforcing bar of corrosion is eliminated rust, cleaned, then reinforcing bar is made antirust place
Reason；
3.2 punching at the wet seam crossing of floorings, erect hanging device, the hole that lifting rope is dug out by wet seam crossing above small box girder
Hole lifting U-shaped steel plate hoop is in place, makes U-shaped steel plate hoop cover whole base plate and the web of small box girder, then connects Screw arbor with nut at both-ends by U
Shape steel plate hoop is fixed on small box girder；
Small box girder and U-shaped steel plate hoop, to the full high-strength binding material of pressure injection between small box girder and U-shaped steel plate hoop, are bonded into whole by 3.3
Body, plays common stress deformation effect；
3.4 other by cut concrete position use polymer mending mortar exfoliation is repaired.
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 1, it is characterised in that described high-strength bonding material
Material should meet following requirement: 1) with Concrete Bond Strength not less than 2.5Mpa；2) elastic model amount is more than 1000Mpa；3) mix
With rear, setting time is more than half an hour；4) adhesion strength within 6 hours is above standard the half of intensity.
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 2, it is characterised in that described high-strength bonding material
Material is epoxy resin mortar or MPC composite.
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 1, it is characterised in that described Two bors d's oeuveres channel-section steel is adopted
Becoming an entirety with two hot-rolled steel channels with upper and lower Plate Welding, the beam slab being fixed between two bent caps by connecting screw rod cuts with scissors
Below seam, and the upper steel plate of Two bors d's oeuveres channel-section steel extends over the hinge seam above bent cap；Two bors d's oeuveres channel-section steel or H profile steel beam meet following bar
Part: 1) with the top flange width of beam base plate bonding not less than 150mm, high no less than 150mm, thickness of slab is no less than 6mm；2) use
Q345 or Q235 steel；3) weathering steel, carbon steel and Hi-Stren steel are used；4) upper surface of girder steel top flange, factory throws
Ball Sa2.5 level, if on-the-spot discovery is got rusty, should manual ball blast to St3.0 level.
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 4, 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-lasting anticorrosive coating all should be used.
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 1, it is characterised in that described connection screw rod is adopted
By 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.
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 1, it is characterised in that described U-shaped steel plate hoop
Meet and require as follows: 1) use Plate Welding to form, steel plate thickness is not less than 6mm；2) Q345 or Q235 steel is used；3) can use
Weathering steel, carbon steel or Hi-Stren steel, when use after both time, exposed face all should use long-acting type anticorrosive coating；(4)
Meet and at diaphragm, after steel plate bending, wrap up diaphragm outer surface, and fix by crab-bolt；(5) U-shaped steel plate hoop inner surface, factory's ball blast
Sa2.5 level, if on-the-spot discovery is got rusty, should manual ball blast to St3.0 level.
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 1, it is characterised in that described Screw arbor with nut at both-ends is full
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。
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 1, it is characterised in that described U-shaped steel plate hoop
By segmental hoisting in place after, then be welded into entirety.
Suffer the reinforcement means of fired damage bridge the most as claimed in claim 1, it is characterised in that described U-shaped steel plate hoop
Extend to the top board lower position of T beam or small box girder, and the full high-strength binding material of pressure injection between U-shaped steel plate hoop and top board.
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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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| CN106223212A true CN106223212A (en) | 2016-12-14 |
| CN106223212B CN106223212B (en) | 2017-12-15 |
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| CN106988203A (en) * | 2017-05-19 | 2017-07-28 | 重庆工商职业学院 | With the concrete hollow slab bridge for laterally strengthening bridge deck pavement |
| CN107620263A (en) * | 2017-10-26 | 2018-01-23 | 南京林业大学 | A kind of reinforcement means for strengthening bridge lateral contact |
| 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 |
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| CN109468965A (en) * | 2018-12-04 | 2019-03-15 | 浙江交通职业技术学院 | A kind of concrete-bridge bracing means and reinforcement means by Fire-damaged |
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN106223212B (en) | 2017-12-15 |
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Effective date of registration: 20190823 Address after: 315 000 No. 72 Songzhaoqiao Road, Ningbo City, Zhejiang Province Co-patentee after: Tibet Ganoderma Lucidum Construction Consulting Group Co., Ltd. Patentee after: NINGBO COMMUNICATIONS PLANNING INSTITUTE CO., LTD. Address before: 315 000 No. 72 Songzhaoqiao Road, Ningbo City, Zhejiang Province Patentee before: NINGBO COMMUNICATIONS PLANNING INSTITUTE CO., LTD. |