CN108677758A - The antidumping anti-fall girder apparatus and its construction method that existing bridge is added - Google Patents
The antidumping anti-fall girder apparatus and its construction method that existing bridge is added Download PDFInfo
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- CN108677758A CN108677758A CN201810443730.7A CN201810443730A CN108677758A CN 108677758 A CN108677758 A CN 108677758A CN 201810443730 A CN201810443730 A CN 201810443730A CN 108677758 A CN108677758 A CN 108677758A
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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
Abstract
The antidumping anti-fall girder apparatus and its construction method added the invention discloses existing bridge; the structure includes the upper and lower girder falling being arranged on bent cap and box beam crossbeam; upper and lower girder falling is connected by steel strand wires connector; steel strand wires connector both ends are pierced by lower girder falling, upper girder falling respectively, and spring, baffle plate, fixing nut and protective cover is respectively set in both ends end.The present invention uses the antidumping anti-fall girder apparatus that above-mentioned technology obtains, when loaded vehicle leans on the outside of bridge when driving, steel strand wires passively tense stress on the inside of box beam, it is additionally provided the anchorage of a bridge, to reach the ability of enhancing bridge antidumping, improve the force-bearing situation of bridge, eliminate the security risk of existing highway bridge, its construction technology is easy to operate, worker is easy to grasp, speed of application is fast, and there is preferable economic benefit and social benefit, facilitate application, anti-fall girder apparatus construction is added especially suitable for camber beam, linear beam, profiled beam etc..
Description
Technical field
The invention belongs to technical field of building construction, and in particular to antidumping anti-fall girder apparatus that existing bridge is added and its
Construction method.
Background technology
It is in all parts of the country after reform and opening-up to have built a large amount of highway, Urban Bridge one by one, wherein being no lack of large bridge
Grade separation intercommunication.With the fast development of society and economic construction, vehicle carrying capacity, running speed quickly improve, to existing bridge
The grade separation bridge intercommunication that the bearing capacity of beam, resistance to capsizing propose severe challenge, especially Earlier designs is more severe.
The grade separation bridge intercommunication superstructure of Earlier designs uses cast-in-situ steel reinforced concrete camber beam, substructure base substantially
This uses the form of pier stud+bent cap, and bearing is arranged in bent cap top again.Due to being restricted by society at that time, economic condition, Earlier designs
Often turning radius is smaller for bridge intercommunication, and box beam line style curvature is larger, and one of main feature of such bridge, which is exactly that bridge is anti-, inclines
It is poor to cover ability, when loaded vehicle leans on the outside of bridge when driving, box beam seriously jeopardizes row there are seat empty and the security risk toppled
Vehicle safety.Occurs the news report toppled by resistance to capsizing deficiency in relation to bridge in relevant report.
Today of rapid economic development, vehicle carrying capacity significantly improve, and road loaded vehicle gradually increases, to the carrying energy of existing highway bridge
Power, resistance to capsizing propose severe challenge.In order to meet fast-developing transport need, this just needs to use a kind of good side
Method reinforces existing highway bridge resistance to capsizing, to reach the normal use and bridge structure safe that neither influence bridge, again
Enhance its safety and the requirement of durability.
Invention content
For the above-mentioned problems in the prior art, the purpose of the present invention is to provide the antidumpings that existing bridge is added
Anti-fall girder apparatus and its construction method.It can solve the construction of existing existing highway bridge various resistance to capsizings it is insufficient the problems such as, it is special
Not Shi Yongyu camber beam, linear beam, profiled beam etc. add anti-fall girder apparatus construction.
The antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that lower anti-including what is be arranged on bent cap
The upper girder falling for falling beam and being arranged on box beam crossbeam, the lower girder falling are connect with upper girder falling by steel strand wires connector,
Steel strand wires connector both ends are pierced by lower girder falling, upper girder falling respectively, and spring, baffle plate, solid is respectively set in both ends end
Determine nut and protective cover, spring is set between girder falling outer end face and baffle plate, and fixing nut is arranged outside baffle plate, is protected
Shield is connected on girder falling outer end face, and steel strand wires connector both ends are surrounded.
The antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that lower girder falling and upper anti-fall girder construction
It is identical, and the setting symmetrical above and below of opposite steel strand wires connector, girder falling includes pedestal and bracket, and the pedestal passes through bar planting screw rod
It is fixed on bent cap, on box beam crossbeam with bar planting nut, pedestal and bent cap, the contact surface fill concrete of box beam crossbeam；Bracket welds
Setting is connect in chassis outer side, and the above and below of bracket is equipped with for wearing the mounting hole for penetrating steel strand wires connector.
The antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that pedestal includes vertical steel plate and setting
Connecting plate between vertical steel plate and girder falling, vertical steel plate are fixed on bent cap, box beam by bar planting screw rod and bar planting nut
On crossbeam, connecting plate is welded to connect with vertical steel plate, shape between the contact surface of vertical steel plate, connecting plate and bent cap or box beam crossbeam
At cavity in fill concrete.
The antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that connecting plate is square structure or angular
Structure.
The antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that bracket is to be welded to connect shape by steel plate
At cube structure, be welded to connect with vertical steel plate, cubical upper steel plate, lower steel plate are correspondingly provided with penetrates steel strand wires for wearing
The mounting hole of connector is equipped with cushion pad between upper steel plate and spring.
The antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that be equipped on the inside of cubical upper steel plate
Two pieces of fixing steel plates, fixing steel plate are located at the both sides of mounting hole, and deflector is equipped with by bolt between two pieces of fixing steel plates, are biased to
Device is spliced by two blocks of wedge-shaped wood.
The antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that steel strand wires connector includes that steel twists
Line is arranged PE housings on steel strand wires, and steel strand wires both ends are equipped with anchoring cartridge, and fixing nut is connected on anchoring cartridge.
The construction method for the antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that including walking as follows
Suddenly：
1）Design drawing is familiar in preparation of construction, understands engineering construction environment, investigates bridge present situation situation, to live field
Ground is cleared up, and ground is hardened, and is checked that passed examination rear is thrown again comprehensively to material, the mechanical equipment etc. marched into the arena
Enter to use；
2）It is construction personnel's job platform to set up operating platform operating platform, for carrying out concrete surface treatment, bar planting, steel plate peace
The work such as welding equipment connects, concreting, the installation of steel strand wires connector, external surface of structural member anticorrosive coating, including operation at sea construction
Putting up platform and land operation operation platform are set up；
3）For steel planting according to design drawing, the construction technology of steel planting is as follows：Bar planting hole construction layout → drilling → concrete table
Surface treatment → duct cleaning → injecting glue → bar planting；
4）Steel plate making, installation and site welding
Bracket, the pedestal of anti-fall girder apparatus are all made of steel construction, and the size that steel plate is required according to design and construction drawing is in factory
Blanking makes processing, is transported to live fragment after processing is completed and is installed and carried out site welding, steel plate in-site installation uses hand
It draws the mode of cucurbit that steel plate is hung to precalculated position and is fixed temporarily, then carries out scene splicing welding procedure；Pedestal steel
Plate reserves grout hole and grout outlet needed for casting concrete close to bent cap, box beam crossbeam position, while to pedestal steel plate inside
Surface carries out cleaning and coarse processing, smears concrete interfacial agents, is effectively bonded after ensureing concrete placings；
5）Concrete placings, maintenance and test block indwelling pour into pea gravel concreten or grouting material using concrete delivery pipe from fill orifice,
Until concrete flows out through grout outlet, concrete vibrating is carried out using attached vibrator when grouting；Specification is pressed in casting process
It is required that indwelling test cube in the same condition and standard maintaining test block, covering moisture-keeping maintaining is carried out after pouring to concrete；
6）Steel strand wires connector, protective cover installation
When concrete strength meets code requirement, deflector, cushion pad, steel strand wires connector, spring, backstop are installed successively
Plate, fixing nut and protective cover；
7）Anti-fall girder apparatus anticorrosive coating according to anti-fall girder apparatus local environment, to anti-fall girder apparatus successively through surface cleaning at
Reason, derusting by sandblasting, surface roughness, priming paint, intermediate coat, finishing coat processing；
8）Job platform is removed after anti-fall girder apparatus anticorrosive coating completion and by examination, is removed to job platform.
The construction method for the antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that operation at sea is constructed
Platform includes pier stud in water, arc hoop plate and I-steel, and the arc hoop plate is two pieces, and arc hoop plate is matched with pier stud in water,
The welding of arc hoop plate both sides is equipped with side plate, and two pieces of arc hoop plate settings outside pier stud, are passed through by connection bolt on side plate in water
Connecting hole is fixedly connected, and several I-steel of interval welding setting, the upper and lower surface of I-steel are equipped with limited block, work on arc hoop plate
In word steel and water girder steel support, side plate and arc hoop plate are respectively equipped between pier stud, at I-steel and arc hoop plate connection inner corner trim
Junction is welded with stiffener.
The construction method for the antidumping anti-fall girder apparatus that the existing bridge is added, it is characterised in that the tool of steel planting
Body process is as follows：
It adds the measuring on bent cap and box beam crossbeam of anti-fall girder apparatus screw position according to quasi- and goes out girder falling Up/down base and bar planting
Hole site carries out Completion of Drilling Hole using impact drill, is required further according to design drawing and in-site measurement is combined to determine the lid that need to be cut
The concrete range of beam and box beam crossbeam manually cuts the surface layer mortar on concrete surface, keeps coarse aggregate exposed, then removes table with concrete wire brush
Face laitance rejects surface porosity object；Duct is cleared up again, is first cleared up with hard mane brush, most of dust in duct is removed,
It is blown into high pressure dry air again, blows away bottom hole dust, fragment and moisture；Anchoring adhesive is perfused by bottom hole to hole depth after the cleaning of duct
At 2/3；The dirts such as iron rust, the oil stain of bar planting screw surface are removed, bottom hole are slowly inserted to by the way of reverse rotation, aperture is full
The anchoring adhesive gone out is purged.
By using above-mentioned technology, compared with prior art, the present invention has the advantages that：
The present invention utilizes the spiral shell of implantation by installing girder falling or more bracket in pier stud bent cap position and top box beam crossbeam position
The concrete steel plate of bar and filling makes girder falling pedestal and bracket form entirety with existing bent cap and box beam, and in upper and lower bracket
Between to the finished steel strand wires of drawing-in, and at both ends tighten steel strand wires with nut, when loaded vehicle on the outside of bridge when driving, in box beam
Side steel strand wires passively tense stress, are additionally provided the anchorage of a bridge, to reach the ability of enhancing bridge antidumping,
The force-bearing situation for improving bridge eliminates the security risk of existing highway bridge, construction technology is easy to operate, worker is easy to grasp,
Speed of application is fast, and has preferable economic benefit and social benefit, facilitates application, especially suitable for camber beam, straight line
Beam, profiled beam etc. add anti-fall girder apparatus construction.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the steel strand wires connecting-piece structure schematic diagram of the present invention；
Fig. 3 is the hoop plate cantilever beam structure schematic diagram of the present invention；
Fig. 4 is the vertical view of Fig. 3；
Fig. 5 is the A-A cross-sectional views in Fig. 4.
Specific implementation mode
Below in conjunction with Figure of description, the invention will be further described, but protection scope of the present invention is not limited in
This：
As shown in Figs. 1-2, the antidumping anti-fall girder apparatus that existing bridge of the invention is added, including under being arranged on bent cap 3
Girder falling and the upper girder falling being arranged on box beam crossbeam 1, the lower girder falling are connected with upper girder falling by steel strand wires connector 6
It connects, 6 both ends of steel strand wires connector are pierced by lower girder falling, upper girder falling respectively, and spring 9, backstop is respectively set in both ends end
Plate 10, fixing nut 11 and protective cover 12, spring 9 are set between girder falling outer end face and baffle plate 10, and fixing nut 11 is set
It sets outside baffle plate 10, protective cover 12 is connected on girder falling outer end face, and 9 both ends of steel strand wires connector are surrounded.
Lower girder falling is identical as upper anti-fall girder construction, and opposite 6 setting symmetrical above and below of steel strand wires connector, girder falling include
Pedestal 4 and bracket 5, the pedestal 4 are fixed on bent cap 3, on box beam crossbeam 1 by bar planting screw rod 2 and bar planting nut 13, pedestal 4
With bent cap 3, the contact surface fill concrete of box beam crossbeam 1；The welding setting of bracket 5 is on the outside of pedestal 4, and the above and below of bracket 5
Equipped with for wearing the mounting hole 503 for penetrating steel strand wires connector 6；The pedestal 4 includes vertical steel plate 401 and is arranged in vertical steel plate
Connecting plate 402 between 401 and girder falling, vertical steel plate 401 are fixed on bent cap 3, case by bar planting screw rod 2 and bar planting nut 13
On beam crossbeam 1, connecting plate 402 is welded to connect with vertical steel plate 401, and vertical steel plate 401, connecting plate 402 and bent cap 3 or box beam are horizontal
Fill concrete in the cavity formed between the contact surface of beam 1, the present invention in connecting plate 402 be square structure or angular structure,
Fixed with specific reference to the structure of bent cap 3, box beam crossbeam 1, such as 3 contact surface of bent cap of the present invention is plane, therefore in lower girder falling
Connecting plate 402 is square structure, and 1 contact surface of box beam crossbeam is inclined-plane, therefore the connecting plate 402 of both sides is three in upper girder falling
Angular structure.
As shown, the bracket 5 of the present invention is to be welded to connect the cube structure formed by steel plate, with vertical steel plate 401
It being welded to connect, cubical upper steel plate 501, lower steel plate 502 are correspondingly provided with for wearing the mounting hole 503 for penetrating steel strand wires connector 6,
Cushion pad 8 is equipped between upper steel plate 501 and spring 9；In order to improve its fastness and stability, and it is readily susceptible to installation steel strand wires and connects
Fitting 6, the present invention are equipped with two pieces of fixing steel plates 504 in 501 inside of upper steel plate, and fixing steel plate 504 is located at the two of mounting hole 503
Side, is equipped with deflector 7 between two pieces of fixing steel plates 504 by bolt, and deflector 7 is spliced by two blocks of wedge-shaped wood.
As shown in Fig. 2, the steel strand wires connector 6 of the present invention includes steel strand wires 602, PE housings are arranged on steel strand wires 602
603,602 both ends of steel strand wires are equipped with anchoring cartridge 601, and fixing nut 11 is connected on anchoring cartridge 601.
As shown, the construction method for the antidumping anti-fall girder apparatus that the existing bridge of the present invention is added, including walk as follows
Suddenly：
1）Preparation of construction
A is familiar with design drawing and relevant document；Understand engineering construction environment, bridge present situation situation is investigated, to live field
Ground is cleared up, and ground is hardened, and is realized live " three supplies and one leveling "；
B works out existing bridge and adds antidumping anti-fall girder apparatus special construction plan, while relevant departments' examination ＆ approval being reported to confirm, and
And it carries out written safe practice according to the scheme finally confirmed and tells somebody what one's real intentions are；
C calculates engineering construction quantities, is preferentially purchased to the quasi- material to come into operation, to material, the mechanical equipment marched into the arena
It is equal to be checked comprehensively, it can come into operation after passed examination；
2）Set up operating platform
The main function of a operating platforms is：Predominantly construction personnel's job platform carries out concrete surface treatment on platform, plants
The work such as muscle, steel plate erecting and welding, concreting, steel strand wires installation, external surface of structural member anticorrosive coating.It can be according to live practical
And itself construction equipment, organization arrangement are set up in anti-fall girder apparatus position to be added using former bridge pier and cushion cap or present situation ground
Suitable operation platform, premised on ensureing structure safety;
B operation at sea operation platforms are set up
Its structure is as in Figure 3-5, and operation at sea operation platform is to add anti-fall girder apparatus quasi- using existing pier stud in water
The job platform that pier stud lower position is formed using Member Weldings such as steel plate, I-steel in water, the operation at sea operation platform
Including pier stud in water 14, arc hoop plate 16 and I-steel 18, the arc hoop plate 16 is two pieces, arc hoop plate 16 and pier stud in water
14 matchings, the welding of 16 both sides of arc hoop plate are equipped with side plate 19, and two blocks of arc hoop plates 16 are arranged outside pier stud 14 in water, by connection spiral shell
Bolt 20 is fixedly connected by the connecting hole on side plate 19, several I-steel 18 of interval welding setting, I-steel on arc hoop plate 16
18 upper and lower surfaces are equipped with limited block 15, in I-steel 18 and water between pier stud 14, I-steel 18 connect inner corner trim with arc hoop plate 16
Place is respectively equipped with girder steel support 17, and side plate 19 is welded with stiffener with 16 junction of arc hoop plate；
Platform member is transported to pier stud position using barge or steamer and carries out on-site consolidation by operation at sea operation platform, first aboard ship
Job platform is put up, chain block is then utilized to install assembled good hoop plate cantilever beam to pier stud, adjustment hoop plate cantilever
Beam position, tightens high-strength bolt, by two blocks of hoop plates and the secured banding of column；
C land operation operation platforms are set up
When ground construction regional space is influenced by factors such as traffic above-grounds, operation platform form can construct flat with operation at sea
Platform is identical, or using operating platform is arranged on bent cap, reduces the interference of anti-fall girder apparatus Construction on Ground traffic etc.；Work as land
Upper job execution place is spacious, and when conditions permit, construction operation platform, which can be used, to be set up the form of full hall scaffold and carry out, with drop
Low construction cost；
Full hall scaffold design and set up the scheme of having to comply with and《Construction fastener type steel pipe scaffold technical specification of security》
The requirement of the current specifications such as JGJ130；
3）Steel planting
Steel planting construction technology：Bar planting hole construction layout → drilling → concrete surface treatment → duct cleaning → injecting glue → bar planting.
Bar planting hole construction layout, according to it is quasi- add the measuring on bent cap and box beam crossbeam of anti-fall girder apparatus screw position go out it is anti-
Beam Up/down base and bar planting hole site are fallen, is then drilled.Bar planting drilling is buried using impact drilled as holes, hole depth with anchorage screw
If depth is identical, the big 2~3mm of aperture ratio anchorage screw, duct is answered straight.The hole when bar planting hole position encounters bent cap or box beam reinforcing bar
Position should be avoided, and after drilling, required according to design drawing and in-site measurement is combined to determine the bent cap that need to be cut and box beam
Crossbeam concrete range manually cuts the surface layer mortar on concrete surface, keeps coarse aggregate exposed, then removes surface laitance with concrete wire brush, picks
Except surface porosity object, finally surface dust is blown down with compressed air or clear water rinses, Corrosion Reinforcement is derusted using rust remover, corrosion
It is serious, reinforcement solutions are done to reinforcing bar by design requirement, both ends weld length is more than 5d, duct cleaning first with hard mane brush into
Row cleaning removes most of dust in duct, then is blown into high pressure dry air, blows away bottom hole dust, fragment and moisture, hole planted agent
Keep drying；Anchoring adhesive is perfused by bottom hole to hole depth 2/3 after the cleaning of duct, glue is full of entirely after being inserted into anchorage screw
Duct；Anchorage screw should inspect for acceptance to screw diameter, length etc. before being inserted into.Screw rod should remove screw surface before being inserted into
The dirts such as iron rust, oil stain are inserted into and are slowly inserted to bottom hole by the way of reversely rotating, and the anchoring adhesive that aperture is overfilled should carry out clearly
Remove, first removed, then cleaned with acetone with steel brush, and give wipe it is dry.
It should be conserved by code requirement after screw rod bar planting, resistance to plucking examination must be carried out by code requirement after maintenance
It tests, next procedure of being allowed for access after pass the test.
4）Steel plate making, installation and site welding
Anti-fall girder apparatus bracket, pedestal are all made of steel construction.The selection of anti-fall girder apparatus steel plate makes processing, processing in factory's blanking
Live fragment is transported to after the completion to be installed and carry out site welding；
The measure that steel plate processing and fabricating will be required in strict accordance with design and construction drawing is processed, and in the construction process will be through
Often whether sampling observation plate size meets the requirements, and prevents steel plate fabrication and installation from malfunctioning；
Live screw rod may be because evacuation bent cap and box beam crossbeam reinforcing bar, physical location and design be there are certain deviation, therefore steel plate
On bolt hole in factory process temporarily not construct, wait for steel plate installation before opened at the scene according to screw rod physical location
Hole.
The Q235 steel plates that newly-increased anti-fall girder apparatus steel plate is all made of 1cm~2cm thickness carry out site welding installation, each steel of component
It is I grades that connection, which uses electric arc welding, weld seam grade butt weld grade, between plate, and fillet weld or groove welding are II grade.Construction
Before should carry out qualification of welding procedure in advance.Its welding procedure and relevant parameter should be identical as employed in engineering actual fabrication.
Welding operating personnel must have corresponding operating and be on duty qualification, and no job qualification certificate person must not execute welding procedure.Steel plate site welding
It is carried out as possible on ground, reduces the workload of overhead welding to the greatest extent, improve weldquality.Steel plate should be wanted after welding by specification
It asks and each weld seam is checked, underproof weld seam must be welded again, next procedure of being all allowed for access after qualification.
Steel plate is hung to precalculated position by the way of chain block and is fixed temporarily by steel plate in-site installation, then into
The splicing welding procedure of row scene.Consider adverse effect of the welding high temperature to anchoring adhesive, should be taken in Member Welding effective
Cooling measure, such as the towel that ice water impregnated is wrapped to the half of screw etc. being exposed.
Anti-fall girder apparatus pedestal steel plate should reserve the grout hole needed for casting concrete close to bent cap and box beam position and go out
Mouth is starched, while cleaning and coarse processing are carried out to pedestal steel plate inner surface, smears concrete interfacial agents, to ensure after concrete placings effectively
It bonds.
5) concrete placings, maintenance and test block indwelling
Concrete placings, maintenance and test block indwelling pour into pea gravel concreten or grouting material using concrete delivery pipe from fill orifice, directly
It is flowed out to concrete through grout outlet, concrete vibrating is carried out using attached vibrator when grouting；It is wanted by specification in casting process
Indwelling test cube in the same condition and standard maintaining test block are asked, covering moisture-keeping maintaining is carried out to concrete after pouring；The present invention is in adhesion type
Before vibrator operation, form vibrator should be carried out to check and examination is shaken, when installation, the position of vibrator bottom plate installation screw is answered
Correctly, foundation bolt installation skew should be prevented and keep casing impaired.Foundation bolt should fasten, and the tightness of each bolt answers one
It causes；When using more form vibrators simultaneously on an anti-fall girder apparatus, the frequency of each vibrator should be consistent, relatively
The vibrator in face answers staggered installation；When form vibrator is mounted on anti-fall girder apparatus, each time of vibration is not to be exceeded
1min, when concrete in mould bleeding flowing or at it is horizontal can failure of oscillation, must not again shake in concrete initial set state；
6）Steel strand wires, protective cover installation
The subsequent constructions such as anti-fall girder apparatus steel strand wires installation can be carried out when concrete strength meets code requirement,
Anti-fall girder apparatus is by pedestal 4, bracket 5, steel strand wires connector 6, deflector 7, cushion pad 8, spring 9, baffle plate 10, fixation
The compositions such as nut 11, protective cover 12, construction technology process：Deflector installation → cushion pad installation → steel strand wires, spring, backstop
Plate, nut installation → protective cover installation：
Deflector 7 is bolted on two pieces of fixing steel plates 504 of 501 inside of bracket upper steel plate, and anti-fall girder apparatus steel twists
Hot extrusion PE housings 603 after 602 finished product rope of line is wrapped using 1860 grades of 7 φ s15.2 soap-free emulsion polymeization epoxy spray steel strands, PE housings
603 outer diameter φ 65, Fracture Force 1860kN, steel strand wires nominal area 980mm2；
When steel strand wires device is installed, copes with 601 surface portion of anchoring cartridge up and down and coat the anti-corrosion grease that will not be flowed at 80 DEG C, steel
The installation of twisted wire 602 should be vertical, and steel strand wires position should be hit exactly in duct, and squeezes steel strand wires phenomenon without duct, installs spring successively
9, fixing nut 11 is tightened in baffle plate 10 according to design requirement, and keeping 602 both ends of steel strand wires, there are about the removable momentum of 200mm, peaces
Dustproof protecting cover 12 is filled, late maintaining need to every two years remove protective cover 12, check steel strand wires 602, spring 9, baffle plate 10, consolidate
Determine 11 surface stressing conditions of nut, when finding steel strand wires position offset, adjusts steel strand wires position and stressing conditions in time.
7）Anti-fall girder apparatus anticorrosive coating
According to anti-fall girder apparatus local environment, preservative treatment, including surface cleaning processing, sandblasting are carried out to anti-fall girder apparatus surface
Several procedures such as derusting, surface roughness, priming paint, intermediate coat, finishing coat.Anticorrosive paint is using the heavy antisepsis for being limited to 10 years anti-corrosion year
Lose paint spraying：
A surface cleanings：Clean steel member surface and oil contaminant with organic solvent or metal cleaner, obtain oil-free, it is anhydrous, without dirt,
No rust staining and without other clean surfaces including soluble-salt；
B derustings by sandblasting and rough surface：Derusting by sandblasting is carried out to steel member using sand-blasting machine, removes surface whole corrosion and welding slag
Deng sputtering object and former corrosion-inhibiting coating, it is Sa2.5 grades to obtain cleannes, and roughness is the surface of RZ40~80 μm；
C Seal treatments（Including priming paint, intermediate coat, finishing coat）：It is closed using brushing, roller coating or airless spraying method；
First of the closing in outer surface uses roller coating or brushing method application, remaining closing carries out closing painting using high pressure airless spraying apparatus
Dress, to keep the consistency of integral color；
The leading indicator of seal coat is thickness and adhesive force.Wherein first of seal coat thickness is relatively low, other each road closings
Design requirement should all be reached, checked using magnetic thickness tester；Seal coat adhesive force checked using cross-hatching, Ying Da
To at least 1 grade or more；For environment temperature preferably at 5~38 DEG C, relative humidity is not greater than 85% when application of the present invention, works as relative humidity
It should be painted in 4h when more than 75%.
8）Job platform remove anti-fall girder apparatus anticorrosive coating complete and by examination after, you can carry out job platform tear open
It removes：
Operation at sea platform removal：The object on platform has first been cleared up before removing, has prevented from falling in removing；Remove using barge or
Steamer carries out, and hangs hoop plate cantilever beam using chain block, then unclamps high-strength bolt 20,16 cantilever beam of arc hoop plate is torn open
It hangs onto down and slowly and is steadily placed on ship；
Land operation platform removal：It is strictly removed by scheme and code requirement, the principle torn open afterwards is first taken according to sequence is set up
Successively removed.The object on platform has first been cleared up before removing, has prevented from falling in removing.The stand steel pipe of dismounting, fastener, top
Collet, template, lumps of wood etc. should all be stacked in category set, stack height and must not exceed specification permission height.
The basic principle of the present invention be the quasi- position implantation screw rod for adding anti-fall girder apparatus of existing bent cap and box beam crossbeam,
Girder falling pedestal steel plate is installed, and welds installation girder falling bracket；Then coagulation is filled in pedestal and bent cap, box beam contact surface
Soil makes anti-fall girder apparatus form whole common stress with existing bent cap and box beam；Then steel strand wires, cushion block, spring, spiral shell are installed
Mother, tightening nut makes steel strand wires nature stress.When there is loaded vehicle to be driven through on the outside of bridge, anti-fall girder apparatus steel on the inside of box beam
Twisted wire passively tenses stress, is additionally provided the anchorage of a bridge, can be very to reach the ability of enhancing bridge antidumping
The good security risk for eliminating existing highway bridge rollover, to extend the service life of bridge；And the reinforcing of the old bridge of the present invention changes
The expense of making is only 10%~20% of newly building bridge or so, under normal circumstances the reinforcing expense of bridge be about rebuild new bridge 20%~
30%, can be that country saves a large amount of fund with new bridge ratio is rebuild, economic results in society are very notable.
Application example
The maintenance engineerings such as repair and certain big bridge seat such as 11.1 certain overhead steel box-girder correction
The maintenance engineerings such as repair and the big bridge seat such as the overhead steel box-girder correction include the grade separation and the bridge two parts, this is vertical
Mainly construction content includes for friendship：To this it is overhead rectify a deviation across the section steel box-girder, and add steel lid beam in 36# and 38# piers,
Two sheet-type supports are increased separately on steel lid beam, rectifying by jack up is in place.It adds to resist respectively at 35# piers and 39# pier capping beams both ends and incline
Cover anti-fall girder apparatus.F-C paint coating decoration is carried out to three steel box girder bridge face anticollision steel guard rails and replaces 35# piers and 39# piers
Expansion joint rubber strip.
30 calendar day of engineering total lever factor, the overhead steel box-girder building rectification went into operation from May 3rd, 2012, and May 31 completed
All-work amount, 28 days actual construction times.
Improved bridge is overall beautiful generous, considerably increases bridge resistance to capsizing, extends bridge service life,
Construction quality meets the requirement of national associated acceptance solid specification, obtains the favorable comment of construction unit and supervisor.
11.2 Single column pier improvement project
Single column pier improvement project is to be transformed construction to certain overhead and certain two bridge block of grade separation part Single column pier.
Certain grade separation F1~F4（Span setting 24+24+22.7m）, F8~F11（Span setting 24+24+21m）, I5~I8
（Span setting 21.1+30.5+24.1m）Three ramp bridges are RC Continuous camber beam, and superstructure box beam is wide
7m, lower part bridge pier use the I shape piers with cap.After testing, each bridge pier bearing pad centre-to-centre spacing of three ramp bridge of grade separation is smaller, in mistake
It is difficult to meet antidumping requirement under big Under Eccentric Loading, needs to reinforce.
The grade separation（F1-F4, F8-F11, I5-I8 tri-）Vertical anti-fall girder apparatus is installed at the top of bent cap.Anti-fall girder apparatus
Each pier both sides are arranged in, at intermediate pier center, 1/4 Dun Chu of abutment pier.
80 calendar day of engineering total lever factor, the grade separation add anti-fall girder apparatus construction 30 calendar day of actual construction time.It is improved
Bridge is overall beautiful generous, considerably increases bridge resistance to capsizing, and quality meets the requirement of national associated acceptance solid specification, obtains
The favorable comment of construction unit and supervisor.
Claims (10)
1. the antidumping anti-fall girder apparatus that existing bridge is added, it is characterised in that including being arranged in bent cap（3）On lower girder falling
And it is arranged in box beam crossbeam（1）On upper girder falling, the lower girder falling and upper girder falling pass through steel strand wires connector（6）Even
It connects, steel strand wires connector（6）Both ends are pierced by lower girder falling, upper girder falling respectively, and spring is respectively set in both ends end（9）、
Baffle plate（10）, fixing nut（11）And protective cover（12）, spring（9）It is set to girder falling outer end face and baffle plate（10）It
Between, fixing nut（11）It is arranged in baffle plate（10）Outside, protective cover（12）It is connected on girder falling outer end face, steel strand wires is connected
Fitting（9）Both ends surround.
2. the antidumping anti-fall girder apparatus that existing bridge according to claim 1 is added, it is characterised in that lower girder falling with
Upper anti-fall girder construction is identical, and opposite steel strand wires connector（6）Setting symmetrical above and below, girder falling include pedestal（4）And bracket
（5）, the pedestal（4）Pass through bar planting screw rod（2）With bar planting nut（13）It is fixed on bent cap（3）, box beam crossbeam（1）On, pedestal
（4）With bent cap（3）, box beam crossbeam（1）Contact surface fill concrete；Bracket（5）Welding is arranged in pedestal（4）Outside, and hold in the palm
Seat（5）Above and below be equipped with and for wearing penetrate steel strand wires connector（6）Mounting hole（503）.
3. the antidumping anti-fall girder apparatus that existing bridge according to claim 1 is added, it is characterised in that pedestal（4）Including
Vertical steel plate（401）And it is arranged in vertical steel plate（401）Connecting plate between girder falling（402）, vertical steel plate（401）Pass through
Bar planting screw rod（2）With bar planting nut（13）It is fixed on bent cap（3）, box beam crossbeam（1）On, connecting plate（402）With vertical steel plate
（401）It is welded to connect, vertical steel plate（401）, connecting plate（402）And bent cap（3）Or box beam crossbeam（1）Contact surface between formed
Cavity in fill concrete.
4. the antidumping anti-fall girder apparatus that existing bridge according to claim 3 is added, it is characterised in that connecting plate（402）
For square structure or angular structure.
5. the antidumping anti-fall girder apparatus that existing bridge according to claim 3 is added, it is characterised in that bracket（5）It serves as reasons
Steel plate is welded to connect the cube structure to be formed, with vertical steel plate（401）It is welded to connect, cubical upper steel plate（501）, lower steel
Plate（502）It is correspondingly provided with and penetrates steel strand wires connector for wearing（6）Mounting hole（503）, upper steel plate（501）With spring（9）Between
Equipped with cushion pad（8）.
6. the antidumping anti-fall girder apparatus that existing bridge according to claim 5 is added, it is characterised in that on cubical
Steel plate（501）Inside is equipped with two pieces of fixing steel plates（504）, fixing steel plate（504）Positioned at mounting hole（503）Both sides, two pieces are fixed
Position steel plate（504）Between by bolt be equipped with deflector（7）, deflector（7）It is spliced by two blocks of wedge-shaped wood.
7. the antidumping anti-fall girder apparatus added according to any existing bridges of claim 1-6, it is characterised in that steel twists
Wire connections（6）Including steel strand wires（602）, steel strand wires（602）On be arranged PE housings（603）, steel strand wires（602）Both ends are equipped with anchor
Gu set（601）, fixing nut（11）It is connected to anchoring cartridge（601）On.
8. a kind of construction method for the antidumping anti-fall girder apparatus that existing bridge according to claim 1 is added, feature
It is to include the following steps：
1）Design drawing is familiar in preparation of construction, understands engineering construction environment, investigates bridge present situation situation, to live field
Ground is cleared up, and ground is hardened, and is checked that passed examination rear is thrown again comprehensively to material, the mechanical equipment etc. marched into the arena
Enter to use；
2）It is construction personnel's job platform to set up operating platform operating platform, for carrying out concrete surface treatment, bar planting, steel plate peace
The work such as welding equipment connects, concreting, the installation of steel strand wires connector, external surface of structural member anticorrosive coating, including operation at sea construction
Putting up platform and land operation operation platform are set up；
3）For steel planting according to design drawing, the construction technology of steel planting is as follows：Bar planting hole construction layout → drilling → concrete table
Surface treatment → duct cleaning → injecting glue → bar planting；
4）Steel plate making, installation and site welding
Bracket, the pedestal of anti-fall girder apparatus are all made of steel construction, and the size that steel plate is required according to design and construction drawing is in factory
Blanking makes processing, is transported to live fragment after processing is completed and is installed and carried out site welding, steel plate in-site installation uses hand
It draws the mode of cucurbit that steel plate is hung to precalculated position and is fixed temporarily, then carries out scene splicing welding procedure；Pedestal steel
Plate is close to bent cap（3）, box beam crossbeam（1）The grout hole and grout outlet needed for casting concrete are reserved in position, while to pedestal steel
Plate inner surface carries out cleaning and coarse processing, smears concrete interfacial agents, is effectively bonded after ensureing concrete placings；
5）Concrete placings, maintenance and test block indwelling pour into pea gravel concreten or grouting material using concrete delivery pipe from fill orifice,
Until concrete flows out through grout outlet, concrete vibrating is carried out using attached vibrator when grouting；Specification is pressed in casting process
It is required that indwelling test cube in the same condition and standard maintaining test block, covering moisture-keeping maintaining is carried out after pouring to concrete；
6）Steel strand wires connector, protective cover installation
When concrete strength meets code requirement, deflector is installed successively（7）, cushion pad（8）, steel strand wires connector（6）, bullet
Spring（9）, baffle plate（10）, fixing nut（11）And protective cover（12）；
7）Anti-fall girder apparatus anticorrosive coating according to anti-fall girder apparatus local environment, to anti-fall girder apparatus successively through surface cleaning at
Reason, derusting by sandblasting, surface roughness, priming paint, intermediate coat, finishing coat processing；
8）Job platform is removed after anti-fall girder apparatus anticorrosive coating completion and by examination, is removed to job platform.
9. the construction method for the antidumping anti-fall girder apparatus that existing bridge according to claim 8 is added, it is characterised in that
Operation at sea operation platform includes pier stud in water（14）, arc hoop plate（16）And I-steel（18）, the arc hoop plate（16）For
Two pieces, arc hoop plate（16）With pier stud in water（14）Matching, arc hoop plate（16）Both sides welding is equipped with side plate（19）, two pieces of arcs
Bind round plate（16）Pier stud in water is set（14）Outside, by connection bolt（20）Pass through side plate（19）On connecting hole be fixedly connected, arc
Shape hoop plate（16）Several I-steel are arranged in upper interval welding（18）, I-steel（18）Upper and lower surface is equipped with limited block（15）, I-shaped
Steel（18）With pier stud in water（14）Between, I-steel（18）With arc hoop plate（16）Girder steel support is respectively equipped at connection inner corner trim
（17）, side plate（19）With arc hoop plate（16）Junction is welded with stiffener.
10. the construction method for the antidumping anti-fall girder apparatus that existing bridge according to claim 8 is added, it is characterised in that
The detailed process of steel planting is as follows：
Anti-fall girder apparatus screw position is added in bent cap according to quasi-（3）And box beam crossbeam（1）Upper measuring goes out girder falling Up/down base
With bar planting hole site, Completion of Drilling Hole is carried out using impact drill, required further according to design drawing and in-site measurement determination is combined to need to dig
The bent cap removed（3）With box beam crossbeam（1）Concrete range, manually cut the surface layer mortar on concrete surface, keep coarse aggregate exposed, then use concrete
Wire brush removes surface laitance, rejects surface porosity object；Duct is cleared up again, is first cleared up with hard mane brush, duct is removed
Interior major part dust, then it is blown into high pressure dry air, blow away bottom hole dust, fragment and moisture；Duct cleaning after by anchoring adhesive by
Bottom hole is perfused to hole depth 2/3；Remove bar planting screw rod（2）The dirts such as iron rust, the oil stain on surface, it is slow by the way of reverse rotation
Slowly it is inserted to bottom hole, the anchoring adhesive that aperture is overfilled is purged.
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| CN109930493B (en) * | 2019-04-24 | 2024-01-23 | 中铁二十四局集团有限公司 | Auxiliary assembly device for bent cap and construction method thereof |
| CN109930493A (en) * | 2019-04-24 | 2019-06-25 | 中铁二十四局集团有限公司 | A kind of bent cap assembly auxiliary device and its construction method |
| CN110904819A (en) * | 2019-11-14 | 2020-03-24 | 天津市交通科学研究院 | Device for limiting transverse displacement of curved beam bridge and construction method thereof |
| CN111005308A (en) * | 2019-12-27 | 2020-04-14 | 浙江省交通规划设计研究院有限公司 | Single-column type bridge pier beam bridge and reinforcing and modifying method thereof |
| CN111188287A (en) * | 2020-01-14 | 2020-05-22 | 福建陆海工程勘察设计有限公司 | Combined method for efficiently repairing bridge support void |
| CN112663521A (en) * | 2021-01-12 | 2021-04-16 | 山西省交通科技研发有限公司 | Improvement and reconstruction method for transverse anti-overturning performance of bridge |
| CN112663521B (en) * | 2021-01-12 | 2022-09-23 | 山西省交通科技研发有限公司 | Improvement and reconstruction method for transverse anti-overturning performance of bridge |
| CN113136789B (en) * | 2021-05-06 | 2022-06-24 | 中国地震局工程力学研究所 | Rotary box girder anti-falling device |
| CN113136789A (en) * | 2021-05-06 | 2021-07-20 | 中国地震局工程力学研究所 | Rotary box girder anti-falling device |
| CN113737731A (en) * | 2021-10-08 | 2021-12-03 | 广州北环智能交通科技有限公司 | Pier steel jacket case anticollision structure |
| CN113944097A (en) * | 2021-10-26 | 2022-01-18 | 北京工业大学 | Friction energy consumption-self-reset beam falling prevention device |
| CN113914235A (en) * | 2021-11-23 | 2022-01-11 | 长安大学 | Transverse anti-overturning catastrophe reinforcement design method for single-column pier bridge |
| CN114382019A (en) * | 2021-12-30 | 2022-04-22 | 浙江正方交通建设有限公司 | Active service T-beam bridge comprehensive reinforcement structure and construction method |
| CN114657868A (en) * | 2022-04-17 | 2022-06-24 | 石家庄铁道大学 | Single-column pier bridge anti-overturning active adjusting device under adverse vehicle load effect |
| CN114657868B (en) * | 2022-04-17 | 2024-05-14 | 石家庄铁道大学 | Single-column pier bridge anti-overturning active adjusting device under adverse vehicle load effect |
| CN114737467A (en) * | 2022-05-20 | 2022-07-12 | 中亿丰建设集团股份有限公司 | Bridge anti-overturning device and construction method thereof |
| CN116879027A (en) * | 2023-09-07 | 2023-10-13 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | U-shaped beam falling prevention structure test method |
| CN116879027B (en) * | 2023-09-07 | 2023-12-05 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | U-shaped beam falling prevention structure test method |
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