CN113136810A - Bridge girder erection machine for integral erection construction of superstructure of long-span bridge and construction method - Google Patents
Bridge girder erection machine for integral erection construction of superstructure of long-span bridge and construction method Download PDFInfo
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- CN113136810A CN113136810A CN202110580076.6A CN202110580076A CN113136810A CN 113136810 A CN113136810 A CN 113136810A CN 202110580076 A CN202110580076 A CN 202110580076A CN 113136810 A CN113136810 A CN 113136810A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a bridge girder erection machine for overall erection construction of a superstructure of a long-span bridge and a construction method, wherein the bridge girder erection machine for overall erection construction of the superstructure of the long-span bridge comprises a main truss arranged in the longitudinal direction, a hoisting device in sliding connection with the upper end surface of the main truss, a front support fixedly arranged at the front end of the main truss in the longitudinal direction, and a support leg system in sliding connection with the main truss; the supporting leg system comprises a plurality of supporting legs, any supporting leg is of a telescopic structure and is provided with a driving device, and the driving device drives the supporting leg to slide on the main truss along the bridge erecting direction; and a plurality of support legs are alternately fixed to support the main truss, and driving devices on the fixed support legs drive the main truss to move for multiple spans along the bridge erection direction. The invention can realize the one-time erection of the multi-span steel beam, thereby not only improving the bridge erection efficacy, but also ensuring the stability of the bridge girder erection machine.
Description
Technical Field
The invention relates to the technical field of bridge construction. More particularly, the invention relates to a bridge girder erection machine for integral erection construction of a superstructure of a long-span bridge and a construction method.
Background
In recent years, national infrastructure and ecological civilization construction are synchronously promoted, and a bridge needs less land than a roadbed, so that the bridge is widely applied, the requirement on the floor area of a substructure of the bridge is further reduced, and the bridge is promoted to develop towards a large-span direction. In the long span bridge category, beam bridges are the more economical structural type. The beam bridge superstructure type can select prestressed concrete structure and steel-concrete composite beam structure, and has maximum span upper limit when aiming at prestressed concrete beam design, so the steel-concrete composite beam structure can be preferably selected as the beam bridge superstructure. The beam bridge construction process is a method for cast-in-place and bridging of a support frame, if a support frame method is adopted, foundation treatment is required, the engineering quantity of the support frame is large, the requirement for saving resources cannot be met, and the bridge erection machine method is an assembly process and meets the requirements for energy-saving, environment-friendly and green construction.
For a long-span bridge, a steel-concrete composite beam is adopted, the integral hoisting weight is large, and the requirement on the performance of a bridge girder erection machine is high. The bridge girder erection machine has higher functional cost for meeting the performance, so that the problem can be solved and the optimal functional value can be achieved by adopting a staged hoisting mode for the cross section. The conventional bridge girder erection machine can only meet the requirement of single-span erection, is not beneficial to promoting the construction speed of the engineering and realizes the quick construction of the bridge.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
In order to achieve these objects and other advantages in accordance with the present invention, there is provided a bridge girder erection machine for integral erection construction of a superstructure of a long span bridge, including a main truss disposed in a longitudinal direction, a hoisting device slidably coupled to an upper end surface of the main truss, and a front bracket fixedly disposed at a front end of the main truss in the longitudinal direction, and further including a leg system slidably coupled to the main truss;
the supporting leg system comprises a plurality of supporting legs, any supporting leg is of a telescopic structure and is provided with a driving device, and the driving device drives the supporting leg to slide on the main truss along the bridge erecting direction; and a plurality of support legs are alternately fixed to support the main truss, and driving devices on the fixed support legs drive the main truss to move along the bridge erection for multiple spans.
Preferably, any of the legs further comprises:
the supporting leg U beam is transversely arranged below the main truss in the bridge direction;
the pair of vertical legs are fixedly arranged at two ends of the supporting leg U beam, and two pulley blocks are arranged at the top end of each vertical leg at intervals up and down; the bottoms of the two sides of the main truss are provided with lower cross rods, and the top surface and the bottom surface of each lower cross rod are respectively provided with a sliding rail matched with the pulley block; the driving device is connected with any pulley block and drives the pulley block and the sliding rail to slide relatively;
the arbitrary small supporting leg is transversely arranged below the supporting leg U beam in the bridge direction and is hinged with the supporting leg U beam; optionally, a plurality of first oil cylinders are embedded in the bottom of the small support leg, and the telescopic ends of the first oil cylinders extend out of the bottom surface of the small support leg and are hinged with spherical hinge supports.
Preferably, it includes that the leg is erected with down to erect wantonly the leg, it erects the leg with down erect the leg and pass through rotatory round pin hub rotation and connect to erect the leg, erect down and be provided with the rotation motor on the leg, the rotation motor drive rotatory round pin hub rotates, drives down to erect the leg around it rotates to erect the leg.
Preferably, the leg system comprises four legs, and the four legs are a first middle leg, a second middle leg, a first rear leg and a second rear leg from front to back along the bridge erection direction; and a second oil cylinder is further arranged between any small supporting leg of the second middle supporting leg and the supporting leg U beam, the fixed end of the second oil cylinder is fixedly connected with the supporting leg U beam, and the telescopic end of the second oil cylinder is fixedly connected with the small supporting leg.
Preferably, the lifting device includes:
any truss hanging cross beam is transversely arranged above the main truss in the bridge direction and is in sliding connection with the upper end face of the main truss;
and a hoisting trolley is arranged above the truss hanging beam in a sliding manner, and can move along the axial direction of the truss hanging beam under the action of a driving motor.
Preferably, the apparatus further comprises a plurality of pulling devices, any of the pulling devices comprising:
the lifting cross beam is fixedly arranged below the main truss in the transverse bridge direction;
the lifting device comprises a lifting beam, a plurality of jacks, a lifting mechanism and a lifting mechanism, wherein any jack is vertically and fixedly arranged above the lifting beam; the telescopic end of any jack is fixedly connected with a lifting steel strand, and the other end of the lifting steel strand is fixedly connected with an erected steel beam;
and the jack lifts the lifting steel strand upwards to pre-tension the erected steel beam.
The invention also aims to provide a construction method of the bridge girder erection machine for integrally erecting and constructing the superstructure of the long-span bridge girder, which comprises the following steps: along the bridge erection direction, installation has been accomplished to N1 pier, N1 section girder steel, N2 pier, N2 section girder steel, N3 pier, N3 section girder steel, N4 pier, N5 pier, N6 pier, the fore-stock is located N5 pier mound top, first well landing leg with landing leg is located in the second the main truss is anterior, first back landing leg is located rear portion in the main truss, the second back landing leg is located the main truss afterbody, including following step:
s1, lifting the front supporting leg and the second rear supporting leg, wherein the second middle supporting leg and the first rear supporting leg are respectively supported on an N3 section steel beam and an N2 section steel beam, moving the lifting device to the tail of the main truss, and moving the main truss forwards until the front supporting leg is supported on the pier top of the N5 pier, so that a first hole passing hole is completed, namely, the main truss forwards travels for one step;
s2, lifting the second middle support leg, moving the first middle support leg and the second middle support leg above the pier of the N5, and dropping the second middle support leg to support the pier top of the pier of the N5; the second rear supporting leg is lowered to be supported on the N2 steel beams, and the first rear supporting leg is lifted; moving the first rear supporting leg forwards to the front end of the N3 sections of steel beams and then falling down to enable the first rear supporting leg to be supported on the N3 sections of steel beams;
s3, lifting the front support and the second rear support leg, moving the main truss forwards until the front support supports the pier top of the N6 pier, and dropping the second rear support leg to support the second rear support leg on the N3 section of steel beam to complete a second hole passing;
s4, hoisting N5 sections of steel beams to be installed by the hoisting device, moving the two girder hoisting cross beams forwards until the N5 sections of steel beams reach the upper part of a second hole, adjusting the positions of the hoisting trolleys on the girder hoisting cross beams to enable the sections of steel beams to be located above the designed positions, and dropping the N5 sections of steel beams to the pier tops of an N5 pier and an N6 pier; dropping the first middle supporting leg to be supported on the N5 steel beams, and retracting the second middle supporting leg; and installing the N4 sections of steel beams above the first hole in the same way to complete the erection of the two hole steel beams.
Preferably, the bridge deck is installed after the erection of the two-hole steel beam is completed, and the installation of the bridge deck specifically comprises the following steps:
s5, moving the two truss hanging cross beams to return to the tail parts of the main trusses, hoisting a bridge deck to be installed by using the hoisting device, moving the two truss hanging cross beams forwards until the bridge deck reaches the position above the N5 section of steel beam, and adjusting the position of the hoisting trolley on the truss hanging cross beams to enable the bridge deck to be located above the designed position;
s6, installing the lifting device at the position where the lifting force is needed, and applying the lifting force to the N5 steel beam; dropping the bridge deck to be mounted on the N5 sections of steel beams; loading the lifting force in the lifting device to the final design requirement; installing bridge decks on the N4 steel beams in the same manner;
s7, pouring wet joint concrete between the bridge decks, storing and standing the bridge girder erection machine during the period, and removing the lifting device after the poured concrete reaches the required strength;
and S8, repeating the steps S1-S7 until all the steel beams and the bridge deck are installed.
Preferably, the rotating pin shaft in each of the support legs is rotated to drive the lower vertical leg, the support leg U-beam and the pair of small support legs in each of the support legs to rotate together, so as to lift or fall each of the support legs.
Preferably, the first cylinder in each leg adjusts the length of each leg to achieve lifting or dropping of each leg.
The invention at least comprises the following beneficial effects:
1. in the bridge girder erection machine for integral erection construction of the superstructure of the long-span bridge, which is provided by the invention, the supporting leg system comprises a plurality of supporting legs, a main truss does not need to be supported by all the supporting legs when the main truss moves across the span, the main truss is supported by fixing part of the supporting legs alternately, meanwhile, the driving device on the supporting legs for supporting the main truss drives the main truss to move along the bridge erection direction for multiple spans, and then the steel girder is hoisted by the hoisting device, so that the multi-span steel girder can be erected at one time, the bridge girder erection effect is improved, and the stability of the bridge girder erection machine is also ensured.
2. In the bridge girder erection machine for integral erection construction of the superstructure of the long-span bridge provided by the invention, each supporting leg in the supporting leg system is provided with the rotary pin shaft and the rotary motor, and the main truss can be alternatively supported by retracting or falling down the rotary pin shaft and the rotary motor in the advancing process of the main truss.
3. In the bridge girder erection machine for integral erection construction of the superstructure of the long-span bridge, provided by the invention, the first oil cylinder is arranged on each supporting leg in the supporting leg system, and the distance between the bottom of the supporting leg and the pier top or the bridge floor can be adjusted through the first oil cylinder, so that the supporting leg is lifted or falls to alternate the main truss.
4. The bridge girder erection machine for integral erection construction of the superstructure of the long-span bridge provided by the invention is provided with the lifting device, so that an upward lifting force can be provided for the corresponding steel girder when a concrete panel is poured at the later stage, the steel girder can bear the load of the concrete panel, the erection performance requirement of the bridge girder erection machine can be reduced, and the steel consumption for design is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic side view of a bridge girder erection machine according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the leg according to the above embodiment of the present invention;
FIG. 3 is a schematic structural view of the second center leg according to the above embodiment of the present invention;
FIG. 4 is a schematic structural view of the vertical leg according to the above embodiment of the present invention;
fig. 5 is a schematic structural diagram of the hoisting device according to the above embodiment of the present invention;
FIG. 6 is a schematic structural view of the lifting device according to the above embodiment of the present invention;
fig. 7 is a schematic structural view illustrating the main girder travels one span according to the above embodiment of the present invention;
fig. 8 is a schematic structural view of the main truss traveling for two spans according to the above embodiment of the present invention;
fig. 9 to 10 are schematic structural views of the bridge girder erection machine during hoisting of the steel girder according to the above embodiment of the invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the present invention provides a bridge girder erection machine for overall erection construction of a superstructure of a long span bridge, which includes a main truss 1 arranged in a longitudinal direction, a hoisting device 4 slidably connected to an upper end surface of the main truss 1, a front support 2 fixedly arranged at a front end of the main truss 1 in the longitudinal direction, and a leg system 3 slidably connected to the main truss 1.
The supporting leg system 3 comprises a plurality of supporting legs, any supporting leg is of a telescopic structure and is provided with a driving device 302, and the driving device 302 drives the supporting leg to slide on the main truss 1 along the bridge erecting direction; a plurality of the supporting legs are alternately fixed to support the main truss 1, and the driving devices 302 on the fixed supporting legs drive the main truss 1 to travel for multiple spans along the bridge erecting direction.
In this solution, the driving device 302 on each leg adjusts the position of part of the legs in the leg system 3 on the main truss 1 and fixes it on the installed pier top or bridge floor, so that the fixed part of the legs can ensure the stability of the main truss 1. The driving means 302 of the fixed part of the legs are actuated to drive the main girder 1 to move forward in the bridge erecting direction until the front bracket 2 moves forward to reach the next pier top, and the front bracket 2 is fixed on the pier top to support the main girder 1. The front support 2 is formed by splicing a plurality of support sections and can adapt to the elevation changes of different erection areas. According to the stress condition of the main truss 1, adjusting the position of part of the support legs on the main truss 1 and re-determining the support legs needing to be fixed. And releasing the fixed connection of the front support 2, and moving the main truss 1 forwards until the front support 2 reaches the top of the next pier, so as to finish the two-span advancing. And fixing the front support 2 again, adjusting the supporting legs to be fixed, and ensuring the stability of the steel beam in the hoisting process. And then starting the hoisting device 4 to hoist the steel beams on the two spans in sequence, wherein the hoisting device 4 needs to move to the tail part of the main truss 1 before the main truss 1 crosses the span for the first time, and the steel beams to be installed are transported to the lower part of the hoisting device 4 by a beam transporting vehicle to feed the beams when the steel beams are hoisted.
In another embodiment, any of the legs further comprises:
the supporting leg U-shaped beam 304 is transversely arranged below the main truss 1 in the bridge direction;
the pair of vertical legs 303 are fixedly arranged at two ends of the supporting leg U beam 304, and two pulley blocks 301 are arranged at the top end of each vertical leg 303 at intervals up and down; the bottoms of the two sides of the main truss 1 are provided with lower cross rods, and the top surface and the bottom surface of each lower cross rod are respectively provided with a sliding rail matched with the pulley block 301; the driving device 302 is connected with any pulley block 301 and drives the pulley block 301 to slide relative to the sliding rail;
a pair of small legs 305, wherein any small leg 305 is transversely arranged below the leg U-shaped beam 304 in a bridging manner and is hinged with the leg U-shaped beam 304; a plurality of first oil cylinders 306 are embedded at the bottom of the small supporting leg 305, and the telescopic ends of the first oil cylinders 306 extend out of the bottom surface of the small supporting leg 305 and are hinged with a spherical hinge support 307.
In the technical scheme, the lower cross bar is arranged between two pulley blocks 301 which are arranged at an interval from top to bottom, when the support leg is fixed on the pier top or the bridge floor, the support leg is used for supporting the main truss 1, the roller set 301 which is positioned below is in contact with the slide rail on the bottom surface of the lower cross bar, and the driving device 302 on the support leg is started to drive the roller set 301 which is positioned below to roll so as to drive the main truss to move along the longitudinal bridge direction. When the support leg is not used as a supporting member, the support leg is equivalently suspended on the main truss 1, at this time, the pulley block 301 located above is in contact with the slide rail on the top surface of the lower cross bar, and the driving device 302 on the support leg is started to drive the roller block 301 located above to roll, so as to drive the support leg to move on the main truss 1 along the longitudinal bridge direction.
As shown in fig. 2, a plurality of first oil cylinders 306 are embedded in the bottom surface of any small leg 305, the first oil cylinders 306 are symmetrically arranged on two sides of the bottom surface of the small leg 305, and the first oil cylinders 306 are used for adjusting the length of the leg. When the supporting legs are used for supporting the main truss 1, the first oil cylinders 306 are jacked to enable the supporting legs to fall down to be fixedly connected with pier tops or bridge decks of piers; when the leg is not used as a support member, the fixed connection of the leg is released, and the first oil cylinder 306 retracts to lift the leg. The first oil cylinders 306 are arranged in a plurality, so that the length of the supporting leg can be adjusted adaptively according to the height change of a bridge erection area. Each telescopic end of the first oil cylinder 306 is hinged with a spherical hinge support 307, and the spherical hinge supports 307 can adapt to small-range inclination of a supporting position, so that the supporting of the supporting leg is more stable.
In another embodiment, any of the vertical legs 303 includes an upper vertical leg 3031 and a lower vertical leg 3034, the upper vertical leg 3031 and the lower vertical leg 3034 are rotatably connected by a rotating pin 3032, a rotating motor 3033 is provided on the lower vertical leg 3034, and the rotating motor 3033 drives the rotating pin 3032 to rotate so as to drive the lower vertical leg 3024 to rotate around the upper vertical leg 3031.
In this solution, as shown in fig. 4, when the outrigger is not needed to support the main truss 1, the lower vertical leg 3024 can be rotated around the upper vertical leg 3031 toward the main truss 1 by the rotating motor 3033 and the rotating pin 3032, and the outrigger U-beam 304 and the pair of small outriggers 305 are driven to rotate together to lift the outrigger; similarly, when the outrigger is used to support the main truss 1, the lower vertical leg 3024 may be rotated around the upper vertical leg 3031 in the direction of the deck by the rotating motor 3033 and the rotating pin 3032, and the outrigger U-beam 304 and the pair of small outriggers 305 may be rotated together to drop the outrigger.
In another embodiment, the leg system 3 comprises four legs, which are a first middle leg 31, a second middle leg 32, a first rear leg 33 and a second rear leg 34 from front to back along the bridge erecting direction; a second oil cylinder 308 is further arranged between any small supporting leg 305 of the second middle supporting leg 32 and the supporting leg U beam 304, a fixed end of the second oil cylinder is fixedly connected with the supporting leg U beam 304, and a telescopic end of the second oil cylinder is fixedly connected with the small supporting leg 305.
In this technical solution, as shown in fig. 3, considering that the second center leg 32 needs to be switched between two height conditions of a pier top and a bridge floor during the process of the bridge girder erection machine traveling across and hoisting a steel girder, the second oil cylinder 308 is added to the second center leg 32 to expand the length adjustment range of the second center leg 32. When the second middle support leg 32 falls on the bridge floor, the length of the second middle support leg can be finely adjusted through the first oil cylinder 306; when the second middle support leg 32 falls on the pier top of the pier, the second middle support leg 32 is lifted by the second oil cylinder 308 to be further extended, and the distance between the second middle support leg and the pier top of the pier is finely adjusted by the first oil cylinder 306.
In another embodiment, the lifting device 4 comprises:
any truss hanging cross beam 41 is transversely arranged above the main truss 1 in the bridge direction and is in sliding connection with the upper end face of the main truss 1;
a lifting trolley 43 is arranged above any truss girder 41 in a sliding manner, and the lifting trolley 43 can move along the axial direction of the truss girder 41 under the action of a driving motor 42.
In this technical solution, as shown in fig. 5, the hoisting device 4 is used for hoisting a steel beam to be installed, the two hoisting trolleys 43 on the two girder hoisting beams 41 respectively hoist two ends of the steel beam, and the two girder hoisting beams 41 drive the steel beam to move along the longitudinal bridge direction. The driving motor 42 drives the crane trolley 42 to move along the axial direction of the girder 41, that is, the crane trolley 43 adjusts the position of the steel girder in the transverse bridge direction. The girder 41 and the crane trolley 43 cooperate to move the steel girder above a design position.
In another embodiment, further comprising a plurality of pulling devices 5, any of said pulling devices 5 comprising:
a lifting cross beam 51 which is fixedly arranged below the main truss 1 in the transverse bridge direction;
a plurality of jacks 53, wherein any jack 53 is vertically and fixedly arranged above the lifting cross beam 51; a lifting steel strand 52 is fixedly connected with the telescopic end of any jack, and the other end of the lifting steel strand 52 is fixedly connected with an erected steel beam;
the jack 53 lifts the lifting steel strand 52 upward to pretension the erected steel beam.
In this technical scheme, when a concrete panel is poured, as shown in fig. 6, the lifting device 5 may be set up at a position where a lifting force needs to be provided, one end of the lifting steel strand 52 is fixedly connected to a corresponding steel beam, and the jack 53 lifts the other end of the lifting steel strand 52 upward, so as to provide an upward lifting force to the corresponding steel beam, so that the steel beam can bear the load of the concrete panel, thereby reducing the requirement on the erection performance of the bridge girder erection machine and avoiding an increase in steel consumption for improving the performance of the bridge girder erection machine.
A construction method of a bridge girder erection machine for integrally erecting and constructing a superstructure of a long-span bridge girder is disclosed, and comprises the following steps: along the bridge erection direction, installation has been accomplished to N1 pier, N1 section girder steel 5, N2 pier, N2 section girder steel 6, N3 pier, N3 section girder steel 7, N4 pier, N5 pier, N6 pier, fore-stock 2 is located N4 pier mound top, landing leg 31 in the first with landing leg 31 is located in the second 1 front portion of main truss, first back landing leg 33 is located rear portion in the main truss 1, landing leg 34 is located behind the second 1 afterbody of main truss, its characterized in that, includes following step:
s1, lifting the front leg 2 and the second rear leg 34, wherein the second middle leg 32 and the first rear leg 33 are supported on N3 steel beams 6 and N2 steel beams, respectively, moving the lifting device 4 to the tail of the main truss 1, advancing the main truss 1 until the front support 2 is supported on the top of the N5 pier, and completing a first hole passing, namely advancing for one span;
as shown in fig. 1, the fixed connection between the front bracket 2 and the pier top of the N4 pier is released, the fixed connection between the second rear leg 34 and the N2 steel beam 6 is released, and the second rear leg 34 is lifted. And fixedly connecting the second middle support leg 32 and the first rear support leg 33 with N3 sections of steel beams 7 and N2 sections of steel beams 6 respectively to support the main truss 1. And moving the lifting device 4 to the tail part of the main truss 1 to prepare for subsequent beam feeding. The main truss 1 is driven to advance forwards by the driving devices on the second middle leg 32 and the first rear leg 33 until the front support 2 is positioned on the top of the pier of the N5 pier. And fixedly connecting the front support 2 with the pier top of the N5 pier, wherein the main truss 1 travels for one span. It should be noted that the front support 2 is arranged at the foremost end of the main truss and is a rigid columnar structure formed by splicing a plurality of support sections, and lifting the front support 2 is to release the fixed connection between the front support and the pier top of the pier.
S2, lifting the second middle leg 32, moving the first middle leg 31 and the second middle leg 32 to be above the N5 pier, and dropping the second middle leg 32 to be supported on the N5 pier top; the second rear supporting leg 34 is lowered to be supported on the N2 steel beams 6, the first rear supporting leg 33 is lifted, the first rear supporting leg 33 is moved forwards to the front end of the N3 steel beam and then is lowered to be supported on the N3 steel beam 7;
as shown in fig. 7, the fixed connection between the second middle support leg 32 and the N3 steel beam 7 is firstly released, the driving devices on the first middle support leg and the second middle support leg 32 are started to move forward to the position above the pier top of the N5, and the second rear support leg is dropped to be fixedly connected with the pier top of the N5. The second rear leg 34 is dropped and fixedly connected to the N2 sections of steel beams 6. Lifting the first rear supporting leg 33, starting a driving device on the first rear supporting leg 33, moving the first rear supporting leg 33 to the front end of the steel beam 7 with the section N3 forward, and fixedly connecting the first rear supporting leg 33 with the steel beam 7 with the section N3.
S3, lifting the front support frame 2 and the second rear support leg 34, moving the main truss 1 forward until the front support frame 2 supports the pier top of the N6 pier, and dropping the second rear support leg 34 to support the second rear support leg on the N3 section steel beam 7, thereby completing a second hole passing;
as shown in fig. 8, the fixed connection between the front bracket 2 and the pier top of the N5 pier is released, and the fixed connection between the second rear leg 34 and the N2 steel beam 6 is released. The main truss 1 is driven to advance forwards by the driving devices on the second middle leg 32 and the first rear leg 33 until the front support 2 is positioned on the top of the pier of the N6 pier. And fixedly connecting the front support 2 with the pier top of the N6 pier, dropping the second rear support leg 34 to fixedly connect the second rear support leg with the N3 section of steel beam 7, and enabling the main truss 1 to move forwards for one span to complete second hole passing.
S4, hoisting N5 sections of steel beams 8 to be installed by the hoisting device 4, moving two girder hoisting crossbeams 41 forwards until the N5 sections of steel beams 8 reach the upper part of a second hole, adjusting the positions of the hoisting trolleys 43 on the girder hoisting crossbeams 41 to enable the N5 sections of steel beams 8 to be located above the design positions, and dropping the N5 sections of steel beams 8 to the pier tops of the N5 piers and the N6 piers; lowering the first center leg 31 to be supported on the N5 steel beams 8, and lifting the second center leg 32; installing the N4 sections of steel beams 9 above the first hole in the same way to complete the erection of the two hole steel beams;
as shown in fig. 9, firstly, the N5 sections of steel beams 8 are transported to the lower part of the lifting device 4 by a beam transporting vehicle for beam feeding, the N5 sections of steel beams 8 are hoisted, the N5 sections of steel beams 8 are adjusted to the upper part of the design position by the matching of the truss crane beam 41 and the lifting trolley 43, and then the N5 sections of steel beams 8 are dropped to the pier tops of the N5 piers and the N6 piers; and dropping the first middle support leg 31 to be fixedly connected with the N5 steel beams 8. Lifting the second middle support leg 32 so that the second middle support leg does not interfere with the hoisting of the N4 steel beam 9; and returning the hoisting device 4 to the tail part of the main truss 1, and simultaneously transporting the N4 sections of steel beams 9 to the position below the hoisting device 4 by a beam transporting vehicle for beam feeding to hoist the N4 sections of steel beams 9. Similarly, the N4 steel girders 9 are adjusted to be above the design position by the truss crane beam 41 and the crane trolley 43, and then the N4 steel girders 9 are dropped to the pier tops of the N4 pier and the N5 pier, as shown in fig. 10, thereby completing the erection of the steel girders on two holes.
In another embodiment, the bridge deck is installed after the installation of all the steel beams is completed, and the installation of the bridge deck specifically comprises the following steps:
s5, moving the two girder crane crossbeams 41 to return to the tail of the main girder 1, using the hoisting device 4 to hoist the bridge deck to be installed, moving the two girder crane crossbeams 41 forward until the bridge deck reaches above the N5 section of steel beam 8, and adjusting the position of the crane trolley 43 on the girder crane crossbeams 41 to enable the bridge deck to be located above the design position;
s6, installing the lifting device 5 at a position where lifting force is needed, and applying the lifting force to the N5 steel beam 8; dropping the bridge deck to be mounted on the N5 sections of steel beams 8; then loading the lifting force in the lifting device 5 to the final design requirement; installing the bridge deck on the N4 steel beams 9 in the same way;
s7, pouring wet joint concrete between the bridge decks, storing and standing the bridge girder erection machine, and removing the lifting device 5 after the poured concrete reaches the required strength.
And S8, repeating the steps S1-S7 until all the steel beams and the bridge deck are installed.
In another embodiment, rotating the rotating pin 3032 in each leg causes the lower vertical leg 3034, the leg U-beam 304 and the pair of small legs 305 in each leg to rotate together, so as to lift or fall each leg. When the outrigger is not needed for supporting the main truss 1, the lower vertical leg 3024 can be rotated around the upper vertical leg 3031 towards the main truss 1 by the rotating motor 3033 and the rotating pin 3032, and the outrigger U-beam 304 and the pair of small outriggers 305 are driven to rotate together to lift the outrigger; similarly, when the outrigger is used to support the main truss 1, the lower vertical leg 3024 may be rotated around the upper vertical leg 3031 in the direction of the deck by the rotating motor 3033 and the rotating pin 3032, and the outrigger U-beam 304 and the pair of small outriggers 305 may be rotated together to drop the outrigger.
In another embodiment, the first cylinder 306 in each leg adjusts the length of each leg to achieve the lifting or lowering of each leg. When the supporting legs are used for supporting the main truss 1, the first oil cylinders 306 are jacked to enable the supporting legs to fall down to be fixedly connected with pier tops or bridge decks of piers; when the leg is not used as a support member, the fixed connection of the leg is released, and the first oil cylinder 306 retracts to lift the leg.
In the actual construction process, the rotating pin shaft or the first oil cylinder can be flexibly used for lifting or dropping the supporting legs according to specific conditions.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A bridge girder erection machine for integral erection construction of a superstructure of a long-span bridge comprises a main truss arranged in the longitudinal direction of the bridge, a hoisting device in sliding connection with the upper end surface of the main truss, and a front support fixedly arranged at the front end of the main truss in the longitudinal direction of the bridge, and is characterized by further comprising a support leg system in sliding connection with the main truss;
the supporting leg system comprises a plurality of supporting legs, any supporting leg is of a telescopic structure and is provided with a driving device, and the driving device drives the supporting leg to slide on the main truss along the bridge erecting direction; and a plurality of support legs are alternately fixed to support the main truss, and driving devices on the fixed support legs drive the main truss to move for multiple spans along the bridge erection direction.
2. The bridge girder erection machine for integral erection of a superstructure of a long span bridge of claim 1, wherein any of said legs further comprises:
the supporting leg U beam is transversely arranged below the main truss in the bridge direction;
the pair of vertical legs are fixedly arranged at two ends of the supporting leg U beam, and two pulley blocks are arranged at the top end of each vertical leg at intervals up and down; the bottoms of the two sides of the main truss are provided with lower cross rods, and the top surface and the bottom surface of each lower cross rod are respectively provided with a sliding rail matched with the pulley block; the driving device is connected with any pulley block and drives the pulley block and the sliding rail to slide relatively;
the arbitrary small supporting leg is transversely arranged below the supporting leg U beam in the bridge direction and is hinged with the supporting leg U beam; optionally, a plurality of first oil cylinders are embedded in the bottom of the small support leg, and the telescopic ends of the first oil cylinders extend out of the bottom surface of the small support leg and are hinged with spherical hinge supports.
3. The bridge girder erection machine for integral erection of the superstructure of a long-span bridge girder of claim 2, wherein any of the vertical legs comprises an upper vertical leg and a lower vertical leg, the upper vertical leg and the lower vertical leg are rotatably connected through a rotating pin shaft, and the lower vertical leg is provided with a rotating motor which drives the rotating pin shaft to rotate so as to drive the lower vertical leg to rotate around the upper vertical leg.
4. The bridge girder erection machine for integral erection of a superstructure of a long-span bridge as claimed in claim 3, wherein said leg system comprises four of said legs, which are a first middle leg, a second middle leg, a first rear leg and a second rear leg in sequence from front to rear in the bridge erection direction; and a second oil cylinder is further arranged between any small supporting leg of the second middle supporting leg and the supporting leg U beam, the fixed end of the second oil cylinder is fixedly connected with the supporting leg U beam, and the telescopic end of the second oil cylinder is fixedly connected with the small supporting leg.
5. The bridge girder erection machine for integral erection of a superstructure of a long span bridge girder of claim 1, wherein the hoisting means comprises:
any truss hanging cross beam is transversely arranged above the main truss in the bridge direction and is in sliding connection with the upper end face of the main truss;
and a hoisting trolley is arranged above the truss hanging beam in a sliding manner, and can move along the axial direction of the truss hanging beam under the action of a driving motor.
6. The bridge girder erection machine for integral erection of a superstructure of a long span bridge as claimed in claim 1, further comprising a plurality of pulling devices, any of said pulling devices comprising:
the lifting cross beam is fixedly arranged below the main truss in the transverse bridge direction;
the lifting device comprises a lifting beam, a plurality of jacks, a lifting mechanism and a lifting mechanism, wherein any jack is vertically and fixedly arranged above the lifting beam; the telescopic end of any jack is fixedly connected with a lifting steel strand, and the other end of the lifting steel strand is fixedly connected with an erected steel beam;
and the jack lifts the lifting steel strand upwards to pre-tension the erected steel beam.
7. A construction method of the bridge girder erection machine for integral erection construction of the superstructure of the long span bridge as claimed in any one of claims 1 to 6, at the initial working condition: along the bridge erection direction, installation has been accomplished to N1 pier, N1 section girder steel, N2 pier, N2 section girder steel, N3 pier, N3 section girder steel, N4 pier, N5 pier, N6 pier, the fore-stock is located N5 pier mound top, first well landing leg with landing leg is located in the second the main truss is anterior, first back landing leg is located rear portion in the main truss, the second back landing leg is located the main truss afterbody, its characterized in that includes following steps:
s1, lifting the front supporting leg and the second rear supporting leg, wherein the second middle supporting leg and the first rear supporting leg are respectively supported on an N3 section steel beam and an N2 section steel beam, moving the lifting device to the tail of the main truss, and moving the main truss forwards until the front supporting leg is supported on the pier top of the N5 pier, so that a first hole passing hole is completed, namely, the main truss forwards travels for one step;
s2, lifting the second middle support leg, moving the first middle support leg and the second middle support leg above the pier of the N5, and dropping the second middle support leg to support the pier top of the pier of the N5; the second rear supporting leg is lowered to be supported on the N2 steel beams, and the first rear supporting leg is lifted; moving the first rear supporting leg forwards to the front end of the N3 sections of steel beams and then falling down to enable the first rear supporting leg to be supported on the N3 sections of steel beams;
s3, lifting the front support and the second rear support leg, moving the main truss forwards until the front support supports the pier top of the N6 pier, and dropping the second rear support leg to support the second rear support leg on the N3 section of steel beam to complete a second hole passing;
s4, hoisting N5 sections of steel beams to be installed by the hoisting device, moving the two girder hoisting cross beams forwards until the N5 sections of steel beams reach the upper part of a second hole, adjusting the positions of the hoisting trolleys on the girder hoisting cross beams to enable the sections of steel beams to be located above the designed positions, and dropping the N5 sections of steel beams to the pier tops of an N5 pier and an N6 pier; dropping the first middle supporting leg to be supported on the N5 steel beams, and retracting the second middle supporting leg; and installing the N4 sections of steel beams above the first hole in the same way to complete the erection of the two hole steel beams.
8. The construction method of the bridge girder erection machine for the integral erection construction of the superstructure of the long span bridge girder of claim 7, wherein a bridge deck is installed after the erection of the two-hole steel girders is completed, and the installation of the bridge deck specifically comprises the following steps:
s5, moving the two truss hanging cross beams to return to the tail parts of the main trusses, hoisting a bridge deck to be installed by using the hoisting device, moving the two truss hanging cross beams forwards until the bridge deck reaches the position above the N5 section of steel beam, and adjusting the position of the hoisting trolley on the truss hanging cross beams to enable the bridge deck to be located above the designed position;
s6, installing the lifting device at the position where the lifting force is needed, and applying the lifting force to the N5 steel beam; dropping the bridge deck to be mounted on the N5 sections of steel beams; loading the lifting force in the lifting device to the final design requirement; installing bridge decks on the N4 steel beams in the same manner;
s7, pouring wet joint concrete between adjacent bridge decks, storing and standing the bridge girder erection machine during the period, and removing the lifting device after the poured concrete reaches the required strength;
and S8, repeating the steps S1-S7 until all the steel beams and the bridge deck are installed.
9. The construction method of the bridge girder erection machine for integral erection of the superstructure of the long span bridge as claimed in claim 7, wherein rotating the rotating pin shaft in each of the legs causes the lower vertical leg, the leg U-beam and a pair of the small legs in each of the legs to rotate together, thereby achieving the lifting or dropping of each of the legs.
10. The construction method of the bridge girder erection machine for construction of the whole superstructure of a long span bridge as claimed in claim 7, wherein said first cylinder in each of said legs adjusts the length of each of said legs to achieve lifting or dropping of each of said legs.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110580076.6A CN113136810A (en) | 2021-05-26 | 2021-05-26 | Bridge girder erection machine for integral erection construction of superstructure of long-span bridge and construction method |
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| CN202110580076.6A CN113136810A (en) | 2021-05-26 | 2021-05-26 | Bridge girder erection machine for integral erection construction of superstructure of long-span bridge and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802462A (en) * | 2021-09-28 | 2021-12-17 | 中交二航局第二工程有限公司 | Section-splicing bridge girder erection machine and front supporting leg for hoisting |
| CN113882286A (en) * | 2021-11-12 | 2022-01-04 | 中交二航局第二工程有限公司 | Bridge dismantling and building all-in-one machine and spanning method thereof, bridge dismantling method and new building method |
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2021
- 2021-05-26 CN CN202110580076.6A patent/CN113136810A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802462A (en) * | 2021-09-28 | 2021-12-17 | 中交二航局第二工程有限公司 | Section-splicing bridge girder erection machine and front supporting leg for hoisting |
| CN113802462B (en) * | 2021-09-28 | 2023-04-25 | 中交二航局第二工程有限公司 | Joint bridging machine and front lifting leg thereof |
| CN113882286A (en) * | 2021-11-12 | 2022-01-04 | 中交二航局第二工程有限公司 | Bridge dismantling and building all-in-one machine and spanning method thereof, bridge dismantling method and new building method |
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