Be applied to steel reinforced concrete hybrid beam steel box girder of cable stayed bridge erection method
Technical field
The present invention relates to steel box beam erection field, be specifically related to one and be applicable to steel reinforced concrete hybrid beam steel box girder of cable stayed bridge erection method.
Background technology
Steel box girder of cable stayed bridge routine is set up generally two kinds: one is erection by protrusion, and main feature is steel case beam to be transported to bridge location by pioneer road (trestle), navigation channel (sea) etc. treat below, frame place, utilizes erection crane to promote piecemeal and set up into bridge; The method need to have existing communications and transportation under transport channel and the Long-term Effect bridge at bridge location place.Another kind is longitudinal incremental launching method, main feature is, in bridge one side (or both sides), incremental launching construction platform is set, and temporary rest pier, slideway, nose girder etc. are set, and relies on thrustor, single-point or multi-point pushing by beam body along bridge y direction progressively jacking put in place, suspension cable Cheng Qiao are installed; The method need arrange larger pushing tow job platform, needs ground transport passage, and temporary rest pier is limited across footpath, affects existing communications and transportation under bridge.
Above conventional construction method can not meet steel reinforced concrete hybrid beam steel box girder of cable stayed bridge under the ambient conditions such as ground transport inconvenience, existing communications and transportation is unaffected and set up requirement.Must look for another way, exploitation is on the steel box beam erection new method that environment relies on and impact is all less, to solve a construction environment restriction difficult problem complicated in steel box beam erection construction.
Summary of the invention
The object of the invention is the shortcoming in order to overcome above-mentioned background technology, a kind of steel reinforced concrete hybrid beam steel box girder of cable stayed bridge new method for erecting is provided, be applicable to the ambient conditions such as ground transport inconvenience, existing communications and transportation is unaffected, enrich steel box girder of cable stayed bridge erection construction method.
Technical scheme of the present invention is: one is applied to steel reinforced concrete hybrid beam steel box girder of cable stayed bridge erection method, comprises the following steps:
(1) carry out successively pile foundation, cushion cap, pier shaft, Sarasota, end bay concrete box girder and the construction of steel reinforced concrete adapter section, concrete box girder adopts cast-in-place support to construct, containing entirely girder pre-stressed;
(2) utilize construction bearing platform basis at bridge tail, installation can be promoted to steel case beam merogenesis the bale handle door frame of end bay concrete beam face, during this time by 1st~3 pairs of suspension cables are installed, and successively order by symmetrical stretch-draw;
(3) in concrete girder leans on, fill cantilever erections machine anchoring across end matching, synchronously lay fortune beam orbit at beam face, fortune beam dolly is installed;
(4) steel case beam is transported to lifting assigned address by ground beam transportation vehicle, utilizes bale handle door frame that steel case beam is promoted and along bridge to load-carrying vertical shift, steel case beam be held on beam face fortune beam dolly, and steel case beam is transported to cantilever erections machine inside by fortune beam dolly;
(5) cantilever erections machine hoists, and overhead traveling crane promotes steel case beam and load-carrying moves forward to front end, utilize rotary hanger by steel case beam half-twist aloft, the overhead traveling crane that hoists retreats, wire rope of sling is transferred, steel case beam is connected with existing steel case beam-ends mouth exact matching, in steel case beam splice girth welding process, carries out the corresponding suspension cable of this spliced girder section and install, after steel box beam Welding completes, symmetrical, synchronous tension suspension cable, complete this beam section construction;
(6) cantilever erections machine is removed rear anchor, hoist and move to cantilever erections machine tail end fixing after overhead traveling crane, cantilever erections machine is under hydraulic jack dynamic action, move forward to next sections steel box beam erection position anchoring along walking rails, complete during this time fortune beam trolley track spreading, next lifting of sections steel case beam and transport, repeat to set up operation;
(7) two sides repeat steel case beam and suspension cable installation as stated above, until full-bridge closure.
Described end bay concrete girder has been constructed in advance; In across steel case beam in the segmented making of ground processing space, steel case top surface of the beam arranges interim hanger, hanger mates design with bale handle door frame hoisting hanger and cantilever erections machine suspender, for lifting and double as anchor point after cantilever erections machine.
On the described segmented lifting upper beam of steel case beam, beam, transport beam, bridge location is set a roof beam in place, it is mainly completed by plant equipment such as bale handle door frame, fortune beam dolly and cantilever erections machines; Bale handle door frame is promoted to sections steel case beam on end bay beam face fortune beam dolly, fortune beam dolly by steel case beam in beam face is transported to across cantilever erections machine inside, cantilever erections machine completes steel box beam erection.
Described bale handle door frame, is made up of steel pipe support, longitudinal Bailey truss, horizontal Bailey truss, rail system, walking system, erecting equipment, electrical system and suspender; Described longitudinal Bailey truss is fixed on steel pipe support top, and rail system is fixed on longitudinal Bailey truss top; Described erecting equipment is fixed on horizontal Bailey truss middle part, and laterally walking system is installed at Bailey truss two ends; Described erecting equipment, under electric driving, utilizes suspender to promote steel case beam; Described walking system, under electric driving, can come and go operation in orbit; Described suspender arranges Telescopic steel wire thick stick, thereby adjustable steel case beam center of gravity is controlled lifting attitude.
Formed by main frame, the overhead traveling crane that hoists, rotary hanger, walking rails, traveling hydraulic jack, rear anchor and adjustable supports; Described main frame forms frame construction by bottom framework, vertical rod, girder, brace, connecting rod; Described adjustable supports is positioned at four jiaos of bottom frameworks, is supported on steel case beam face when the anchoring of cantilever erections machine, when the traveling of cantilever erections machine, packs up; Described walking rails and hydraulic jack are all arranged at bottom framework bottom, provide power, cantilever erections machine integral forward lead in orbit by hydraulic jack; Described rotary hanger carries electrical system and Telescopic steel wire thick stick, and suspender is connected with steel case beam hanger coupling, thereby Telescopic steel wire thick stick regulates steel case beam, center of gravity is controlled lifting attitude, and electrical system can drive steel case beam to do 360 ° and rotate freely; The described overhead traveling crane that hoists, under electrical system effect, vertically moves before and after on girder by overhead crane orbit, and the overhead traveling crane that hoists also arranges hydraulic jack, can transverse shifting; Described rear anchor mates design with steel case beam hanger, uses bearing pin to be connected with mounting rail section hanger, thus anchoring cantilever erections machine; Described walking rails is that sectional making, bolt connect, circulation peace is torn use open.
Described fortune beam dolly, is wheel-track type girder carrier, is made up of main spandrel girder, connecting rod, traveling wheels, electrical system, cable hank; Described main spandrel girder two ends utilize and are bolted to traveling wheels top, two main spandrel girders and two connecting rod composition rectangular frame structure, and main spandrel girder end face is consistent with steel case beam contact surface slope, after installation rubber pad, directly bears steel case beam weight; Described connecting rod two ends adopt bearing pin to be connected with main spandrel girder; Totally 4 of described traveling wheels, are arranged on beam face track; Running trolley is under electrical system drives, and traveling wheels come and go operation, the synchronous retractable cable of cable hank at beam face track; Beam face track is made up of rail and sleeper, is fixed on Liang Mianshang, and with the splicing of steel case beam, spreading is equipped with and adjusts joint.
The invention has the beneficial effects as follows: the present invention is not limited by traffic above-ground traffic condition, and the impact of existing environment is dropped to minimum degree, especially do not affect existing communications and transportation under bridge.The present invention breaks through routine, look for another way, the method that steel case beam adopts transport on the lifting of bridge tail, beam, bridge location to set up, technical scheme independence is strong, little to environmental disturbances, the expenses such as navigation channel transport, construction bridge of having saved drop into, and greatly reduce construction cost, when not being subject to communications and transportation restriction, not affecting it and normally move.
When the present invention relates to a kind of steel box beam erection new method, this field construction equipment is carried out innovative design, independent research and is applied to engineering reality, not only effectively solve a construction technology difficult problem, and economic and social benefit is obvious.The present invention has made up the deficiency of conventional construction method, has promoted steel box girder construction technical development, and its steel box beam erection method and construction equipment all have wide promotional value.
Brief description of the drawings
Fig. 1 is integral arrangement structural representation of the present invention;
Fig. 2 is bale handle door frame side elevation structural representation;
Fig. 3 is the positive facade structural representation of bale handle door frame;
Fig. 4 is cantilever erections pusher side facade structures schematic diagram;
Fig. 5 is the positive facade structural representation of cantilever erections machine;
Fig. 6 is fortune beam dolly side elevation structural representation;
Fig. 7 is the positive facade structural representation of fortune beam dolly;
Fig. 8 is fortune beam dolly plane structure schematic diagram;
Fig. 9 is fortune beam dolly travelling wheel pair and beam face section structure schematic diagram;
Wherein: Z1, bale handle door frame, Z2, fortune beam dolly, Z3, cantilever erections machine, Z4, steel case beam, 1, pile foundation, 2, cushion cap, 3, pier shaft, 4, Sarasota, 5, end bay concrete box girder, 6, steel reinforced concrete adapter section, 7, hanger, 8, track, 9, suspension cable, 10, beam transportation vehicle, 11, steel pipe support, 12, longitudinally Bailey truss, 13, rail system, 14, walking system, 15, laterally Bailey truss, 16, erecting equipment, 17, suspender, 18, main frame, 19, overhead traveling crane hoists, 20, rotary hanger, 21, walking rails, 22, rear anchor, 23, overhead crane orbit, 24, overhead traveling crane hydraulic jack, 25, Telescopic steel wire thick stick, 26, spike, 27, traveling hydraulic jack, 28, main spandrel girder, 29, connecting rod, 30, traveling wheels, 31, electrical system, 32, cable hank.
Detailed description of the invention
The present invention is applied to case history, and a kind of new steel box beam erection method is provided, and by reference to the accompanying drawings the specific embodiment of the invention is illustrated as follows:
A, carry out pile foundation (1), cushion cap (2), pier shaft (3), Sarasota (4), end bay concrete box girder (5) and steel reinforced concrete adapter section (6) construction successively, concrete box girder (5) adopts cast-in-place support to construct;
B, utilize construction bearing platform (2) basis at bridge tail, installation can be promoted to steel case beam (Z4) merogenesis the bale handle door frame (Z1) of end bay concrete beam face, during this time by 1st~3 pairs of suspension cables (9) are installed, and successively order by symmetrical stretch-draw;
C, in concrete girder (5) leans on across end matching dress cantilever erections machines (Z3) anchoring, synchronously lay fortune beam orbit (8) at beam face, fortune beam dolly (Z2) be installed;
Steel case beam (Z4) is transported to lifting assigned address by D, ground beam transportation vehicle (10), utilize bale handle door frame (Z1) special hanger (17) by steel case beam (Z4) lifting and along bridge to load-carrying vertical shift, steel case beam (Z4) is held on to beam face fortune beam dolly (Z2) upper, steel case beam (Z4) is transported to cantilever erections machine (Z3) inside by fortune beam dolly (Z2);
E, cantilever erections machine (Z3) hoists, and overhead traveling crane (19) promotes steel case beam (Z4) and load-carrying moves forward to front end, utilize rotary hanger (20) by steel case beam (Z4) half-twist aloft, the overhead traveling crane (19) that hoists retreats, suspender (20) wire rope is transferred, steel case beam (Z4) is connected with existing steel case beam-ends mouth exact matching, in steel case beam (Z4) joint ring seam welding process, carrying out the corresponding suspension cable of this spliced girder section (9) installs, after steel box beam Welding completes, symmetrical, synchronous tension suspension cable (9), complete this beam section construction,
F, cantilever erections machine (Z3) are removed rear anchor (22), hoist and move to cantilever erections machine (Z3) tail end fixing after overhead traveling crane (19), cantilever erections machine (Z3) is under hydraulic jack (27) dynamic action, move forward to next sections steel box beam erection position anchoring along walking rails (23), complete during this time fortune beam trolley track spreading (8), next lifting of sections steel case beam and transport, repeat to set up operation;
G, two sides repeat steel case beam (Z4) and suspension cable (9) installation as stated above, until full-bridge closure;
H, dismounting beam face gadget, carry out suspension cable (9) Suo Li and adjust, until Suo Li and full-bridge line style meet design requirement, completes full-bridge construction.
Described steel box beam erection method, is primarily characterized in that:
(1) end bay concrete girder (5) has been constructed in advance, in across steel case beam (Z4) in the segmented making of ground processing space, steel case beam (Z4) end face arranges interim hanger (7), hanger (7) mates design with bale handle door frame hoisting hanger (17) and cantilever erections machine suspender (20), for lifting and double as anchor point after cantilever erections machine;
(2) on the segmented lifting upper beam of steel case beam (Z4), beam, transport beam, bridge location is set a roof beam in place, it is mainly completed by bale handle door frame (Z1), fortune beam dolly (Z2) and the plant equipment such as cantilever erections machine (Z3).Bale handle door frame (Z1) is promoted to sections steel case beam (Z4) on end bay beam face fortune beam dolly (Z2), fortune beam dolly (Z2) by steel case beam (Z4) in beam face is transported to across cantilever erections machine (Z3) inside, cantilever erections machine (Z3) completes steel case beam (Z4) and sets up.
Described bale handle door frame (Z1), is characterized in that: be made up of steel pipe support (11), longitudinal Bailey truss (12), horizontal Bailey truss (15), rail system (13), walking system (14), erecting equipment (16), electrical system and suspender (17); Described longitudinal Bailey truss (12) is fixed on steel pipe support top, and rail system (13) is fixed on longitudinal Bailey truss (12) top; Described erecting equipment (16) is fixed on horizontal Bailey truss (15) middle part, and laterally walking system (14) is installed at Bailey truss (15) two ends; Described erecting equipment (16), under electric driving, utilizes suspender (17) to promote steel case beam (Z4); Described walking system (14), under electric driving, can come and go operation in orbit; Described suspender (17) arranges Telescopic steel wire thick stick, thereby adjustable steel case beam center of gravity is controlled lifting attitude.
Described cantilever erections machine (Z3), is characterized in that: be made up of main frame (18), the overhead traveling crane that hoists (19), rotary hanger (20), walking rails (21), traveling hydraulic jack (24), rear anchor (22) and adjustable supports (26); Described main frame (18) forms frame construction by bottom framework, vertical rod, girder, brace, connecting rod; Described adjustable supports (26) is positioned at four jiaos of bottom frameworks, is supported on steel case beam face when the anchoring of cantilever erections machine, when the traveling of cantilever erections machine, packs up; Described walking rails (21) and hydraulic jack (27) are all arranged at bottom framework bottom, provide power by hydraulic jack (27), and cantilever erections machine (Z3) is at the upper integral forward lead of track (21); Described rotary hanger (20) carries electrical system and Telescopic steel wire thick stick (25), suspender (20) is connected with steel case beam hanger (7) coupling, Telescopic steel wire thick stick (25) regulates steel case beam (Z4) thereby center of gravity is controlled lifting attitude, and electrical system can drive steel case beam (Z4) to do 360 ° and rotate freely; The described overhead traveling crane that hoists (19), under electrical system effect, vertically moves before and after on girder by overhead crane orbit (23), and the overhead traveling crane that hoists (19) also arranges hydraulic jack (24), can transverse shifting; Described rear anchor (19) mates design with steel case beam hanger (7), uses bearing pin to be connected with mounting rail section hanger, thus anchoring cantilever erections machine (Z3); Described walking rails (21) is that sectional making, bolt connect, circulation peace is torn use open.
Described fortune beam dolly (Z2), it is characterized in that: be wheel-track type girder carrier, formed by main spandrel girder (28), connecting rod (29), traveling wheels (30), electrical system (31), cable hank (32) etc.; Described main spandrel girder (28) two ends utilize and are bolted to traveling wheels (30) top, two main spandrel girders (28) and two connecting rods (29) composition rectangular frame structure, main spandrel girder (28) end face is consistent with steel case beam contact surface slope, after installation rubber pad, directly bears steel case beam weight; Described connecting rod (29) two ends adopt bearing pin to be connected with main spandrel girder (28); Totally 4 of described traveling wheels (30), are arranged on beam face track; Running trolley is under electrical system (30) drives, and traveling wheels (30) come and go operation at beam face track, the synchronous retractable cable of cable hank (32); Beam face track is made up of rail (8) and sleeper, is fixed on Liang Mianshang, and with the splicing of steel case beam, spreading is equipped with and adjusts joint.