CN112144403A - Beam lifting station suitable for steel box girder web plate change and pushing process thereof - Google Patents

Abstract

The invention discloses a girder lifting station suitable for steel box girder web plate change, which comprises a main girder, a movable support, a fixed support, a lifting appliance and a lifting mechanism, wherein the fixed support comprises two parts which are detachably connected up and down, the lower end of the movable support is arranged to be supported on a pushing steel box girder in a sliding manner, the main girder is arranged along the longitudinal direction of a bridge, the fixed support and the movable support can adjust the width in the transverse direction, the lifting appliance is connected through the lifting mechanism, and the lifting mechanism is arranged to move along the longitudinal direction of the main girder. The invention also discloses a pushing process of the girder lifting station suitable for the change of the web plate of the steel box girder. According to the invention, the girder lifting station is designed into various adjustable modes according to the requirements of assembling the web plate and pushing the steel box girder, so as to adapt to the width and position change of the web plate of the steel box girder and the pushing requirements of the steel box girder in different directions, and the structure of the girder lifting station is not required to be repeatedly disassembled and assembled, so that the structural function conversion is carried out under the conditions of safety and high efficiency, and the construction requirements are ensured.

Description

Beam lifting station suitable for steel box girder web plate change and pushing process thereof

Technical Field

The invention relates to the field of bridge construction equipment. More particularly, the present invention relates to a girder lifting station and a pushing process thereof suitable for steel box girder web change.

Background

In bridge construction, when a large-section steel box girder component is integrally lifted or installed, the girder lifting station is widely used. Due to the fact that the design structures of different large-section box girders are different, especially when steel box girders with different section types and stress characteristics are lifted at one position, the structural arrangement of a girder lifting station and the stress safety of the steel box girders have certain requirements so as to meet the requirements of safe construction.

Meanwhile, when the steel box girder bridge is pushed and constructed, the supporting legs fall on the girder lifting station structure on the bridge floor, and the position relation change between the girder lifting station and the steel box girder in the pushing process needs to be adapted, so that the influence of an adverse stress form is avoided, and the structure safety is ensured.

The steel box girder lifting station usually used for pushing adopts a mode that one end of a supporting leg falls on the steel box girder and the other end of the supporting leg is fixed due to the wide width of the steel box girder, and only adapts to pushing towards one direction, and the supporting leg of the lifting station needs to correspond to the position of a web plate of the steel box girder.

Disclosure of Invention

The invention aims to provide a girder lifting station suitable for steel box girder web plate change and a pushing process thereof.

To achieve these objects and other advantages and in accordance with the purpose of the invention, a girder station adapted for web change of a steel box girder comprises a main girder, a movable support, a fixed support, a lifting device and a lifting mechanism, wherein the fixed support comprises two parts detachably connected up and down, the lower end of the fixed support is detachably fixed on a temporary pier, the lower end of the movable support is slidably supported on a pushing steel box girder, the main girder is arranged along the longitudinal direction of the bridge, and both ends of the main girder are respectively connected to the upper ends of the fixed support and the movable support, the transverse direction of the fixed support and the movable support comprises a plurality of structural units which are detachably combined to enable the fixed support and the movable support to adjust the transverse width, the lifting device is connected through the lifting mechanism, the lifting mechanism is arranged to move longitudinally along the main girder, and the lifting device is used for lifting the steel box.

Preferably, the movable support comprises a pair of movable support legs which are arranged at a transverse interval, the pair of movable support legs are connected through a length-adjustable connection cross beam, the fixed support comprises a pair of fixed support legs which are arranged at a transverse interval, the upper parts of the pair of fixed support legs are also connected through a length-adjustable connection cross beam, the main beam is a pair of fixed support legs which are arranged at a transverse interval, each pair of main beams comprises a pair of longitudinal beams which are connected into a whole through a plurality of transverse connections, and the two ends of each pair of main beams are respectively and correspondingly connected with a fixed support leg and a movable support leg which are arranged at the same.

Preferably, the upper end of the movable support is connected with the main beam through two or one hinged support, and the upper end of the fixed support is connected with the main beam through one or two hinged supports.

Preferably, the fixed support legs comprise transverse sliding boats, distribution beams, steel pipe stand columns, longitudinal sliding seats, a fixed frame and hinged supports, the transverse sliding boats, the distribution beams, the steel pipe stand columns, the longitudinal sliding seats, the fixed frame and the hinged supports are sequentially arranged from bottom to top, the steel pipe stand columns are four and form a frame structure, the distribution beams are a pair of longitudinal opposite arrangement, the distribution beams are respectively and fixedly connected with the lower ends of the two steel pipe stand columns in the same transverse direction, the transverse sliding boats are arranged at positions, corresponding to the steel pipe stand columns, below the distribution beams and matched with the rails to slide, the fixed frame is detachably connected to the top ends of the four steel pipe stand columns, the hinged supports are connected with the top ends of the main beams and the fixed frame, the longitudinal sliding seats.

Preferably, the movable support legs comprise transverse sliding boats, longitudinal sliding seats, distribution beams, steel pipe stand columns and hinged supports which are sequentially arranged from bottom to top, the steel pipe stand columns are four and form a frame structure, the distribution beams are a pair of longitudinal opposite arrangement, the distribution beams are respectively and fixedly connected with the lower ends of the two steel pipe stand columns in the same transverse direction, the two transverse sliding boats and the two longitudinal sliding seats are respectively arranged at the positions, corresponding to the two steel pipe stand columns, below the distribution beams in the same transverse direction, and the hinged supports are connected with the main beams and the top ends of the steel pipe stand columns.

Preferably, the lower ends of the movable support legs are slidably supported on the pushing steel box girder through a sliding track, the sliding track is detachably connected with the steel box girder, and the sliding track is of an assembling structure.

Preferably, hoist mechanism is through vertical positioning system along girder longitudinal movement, vertical positioning system is including indulging moving track, positioning base, tie-beam, positioning counter-force seat and positioning hydro-cylinder, indulge move the track vertically lay in on the girder, the positioning base be a pair of and interval slide set up in indulge on moving the track, a pair of positioning base passes through the tie-beam and connects, positioning counter-force seat is fixed in on the girder, positioning hydro-cylinder body is fixed in on the positioning counter-force seat, positioning hydro-cylinder telescopic link is connected the positioning base, hoist mechanism is fixed in on the positioning base.

Preferably, the hoist is including connecting anchor head, cooperation roof beam, otic placode, it is connected with hoist mechanism to connect the anchor head, cooperation roof beam middle part with connect the anchor head through the round pin hub connection, the otic placode is 3 groups and the interval set up in on the cooperation roof beam, every group of otic placode passes through connecting pin hub connection with the steel box girder.

Preferably, the fixed support legs are anchored on the temporary piers through temporary supports and finish-rolled deformed steel bars, the temporary supports are supported between the distribution beam and the upper surfaces of the temporary piers, and the finish-rolled deformed steel bars are in threaded connection with the distribution beam and the temporary piers.

The invention also discloses a girder lifting station pushing process suitable for the change of the web plate of the steel box girder, which comprises the following steps of:

the method comprises the following steps: the movable supporting leg side pushing is completed, the locking of the fixed supporting leg is released, namely the temporary support and the finish rolling deformed steel bar are removed, meanwhile, the connection cross beams of the movable supporting leg and the fixed supporting leg are respectively removed, and the girder lifting station is converted into supporting leg stress on the two transverse sides;

step two: the main beams at the two transverse sides of the girder station, the movable supporting legs and the fixed supporting legs respectively move transversely, after the main beams move transversely to meet the requirements of a steel box girder web plate, temporary locking is installed, the supporting legs are fixed, and then the fixed supporting legs or the movable supporting legs which are connected with the transverse beams and are connected with the two transverse sides are installed;

step three: converting a movable support leg and a fixed support leg hinged support below a main beam of the lifting beam station, preparing for reversing, installing an assembling platform at the side of the movable support leg to the side of the fixed support leg, and preparing for pushing;

step four: after the pushing preparation is finished, a pair of longitudinal beams of the pushing guide beam respectively penetrate through the space inside the pair of fixed supporting legs, and then a cross beam between the pair of main beams is installed;

step five: and laying a sliding track on a longitudinal beam of the guide beam, matching a longitudinally-moving sliding seat on the fixed supporting leg on the sliding track, removing a lower structure of the fixed supporting leg, and normally installing and pushing the steel box beam forwards.

The invention at least comprises the following beneficial effects:

the girder lifting station can adapt to the change of the height and the gradient of the steel box girder when the steel box girder is subjected to pushing construction, can also adapt to the adverse effect of the change of different web widths and web widths of the steel box girder, and can simultaneously meet the influence of the change of a stress system after the change of different pushing directions, particularly the bidirectional pushing construction of the multi-variable web steel box girder.

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 view of the overall construction of a lifting station according to the present invention;

FIG. 2 is a front view of the fixed leg of the present invention;

FIG. 3 is a side view of the fixed leg of the present invention when not inverted;

FIG. 4 is a side view of the fixed leg of the present invention shown after reversing;

FIG. 5 is a front view of the movable leg of the present invention;

FIG. 6 is a side view of the movable leg of the present invention as it moves laterally;

FIG. 7 is a top view of the main beam of the present invention;

FIG. 8 is a schematic structural diagram of the vertical positioning system of the present invention;

fig. 9 is a schematic structural view of the spreader of the present invention;

FIG. 10 is a schematic view of the anchoring structure of the fixed leg of the present invention;

FIG. 11 is a schematic view of a side pushing structure of the movable leg of the present invention;

FIG. 12 is a schematic view of a fixed leg side pushing structure of the present invention;

FIG. 13 is a schematic structural view of a step of the pushing process of the present invention;

FIG. 14 is a schematic structural view of a third step of the pushing process of the present invention;

FIG. 15 is a schematic structural view of a fourth step of the incremental launching process of the present invention;

FIG. 16 is a schematic structural view of a fifth step of the pushing process of the present invention.

Description of reference numerals:

1. the device comprises fixed supporting legs, 11, a transverse sliding ship, 12, a distribution beam, 13, a steel pipe column, 14, a longitudinal sliding seat, 15, a fixed frame, 16, a hinged support, 17, a connection beam, 18, a temporary support, 19, finish rolling deformed steel bar, 2, a movable supporting leg, 3, a main beam, 4, a steel box girder, 5, a temporary pier, 6, a lifting mechanism, 7, a sliding rail, 8, a lifting appliance, 81, a connection anchor head, 82, a matching beam, 83, an ear plate, 9, a longitudinal positioning system, 91, a longitudinal sliding rail, 92, a positioning base, 93, a connecting beam, 94, a positioning counter-force base, 95 and a positioning oil cylinder.

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, the invention provides a girder lifting station suitable for steel box girder web plate change, which comprises a main girder 3, a movable support, a fixed support, a lifting appliance 8 and a lifting mechanism 6, wherein the fixed support comprises two parts which are detachably connected up and down, the lower end of the fixed support is detachably fixed on a temporary pier 5, the lower end of the movable support is arranged to be slidably supported on a pushing steel box girder 4, the main girder 3 is arranged along the longitudinal direction of a bridge, two ends of the main girder are respectively connected with the upper ends of the fixed support and the movable support, the fixed support and the movable support transversely comprise a plurality of structural units which are detachably combined to enable the fixed support and the movable support to adjust the transverse width, the lifting appliance 8 is connected through the lifting mechanism 6, the lifting mechanism 6 is arranged to move longitudinally along the main girder 3, and the lifting appliance 8 is used for lifting the steel box.

In the above technical solution, as shown in fig. 1, the fixed support and the movable support connecting main beam 3 constitute the structure of the whole girder station. The reversing process is as follows: as shown in fig. 11, the movable support side pushes the steel box girder 4, at this time, the fixed support is fixed on the temporary pier 5 and is not moved, so as to ensure the stability of the whole girder lifting station, the movable support and the steel box girder 4 keep relative sliding, a track can be arranged on the steel box girder 4, and the lower end of the movable support is matched with the track to slide; as shown in fig. 12, the pushing direction is reversed, the fixed support side pushes the steel box girder 4, the upper part and the lower part of the fixed support are disassembled, the lower part is disassembled, the steel box girder 4 is provided with a slide rail, the upper part of the fixed support is slidably positioned on the steel box girder 4, the pushing of the steel box girder 4 is realized, and at the moment, the movable support is fixedly supported on the steel box girder 4. The change process of the steel box girder 4 web plate is as follows: the fixed support and the movable support transversely comprise a plurality of structural units and are detachably connected, and according to the change of the web plate of the steel box girder 4, redundant structural units are detached or more structural units are assembled to realize the adaptation of the girder lifting station to the change of the web plate of the steel box girder 4. The steel box girder 4 is connected with the girder lifting station through the lifting appliance 8, the steel box girder 4 is lifted through the lifting mechanism 6, the lifting mechanism 6 can move longitudinally along the girder 3, the longitudinal walking contraposition pushing of the steel box girder 4 is realized, the lifting mechanism 6 comprises a lifting jack system and a steel strand winding device, the steel box girder 4 is integrally lifted, the lifting jack system is power for upwards lifting the steel box girder 4, and the steel strand winding device is used for winding steel strands used by the lifting jack system into a disc, so that the stirring or the damage is prevented.

In another technical solution, as shown in fig. 2 to 7, the movable support includes a pair of movable legs 2 disposed at a horizontal interval, the pair of movable legs 2 are connected by a length-adjustable connection cross beam 17, the fixed support includes a pair of fixed legs 1 disposed at a horizontal interval, the upper portions of the pair of fixed legs 1 are also connected by a length-adjustable connection cross beam 17, the main beams 3 are a pair and disposed at a horizontal interval, each pair of main beams 3 includes a pair of longitudinal beams, the pair of longitudinal beams are connected into a whole by a plurality of horizontal links, and two ends of each pair of main beams 3 are respectively and correspondingly connected with a same longitudinal fixed leg 1 and a movable leg 2.

In the above technical solution, the fixed support and the movable support both include a pair of legs, and the pair of legs are connected through the connection beam 17, and the length of the connection beam 17 is adjustable, that is, the distance between the pair of legs is adjustable, that is, the widths of the fixed support and the movable support are adjustable to adapt to the change of the web of the steel box girder 4. The connection beam 17 is formed by detachably assembling a plurality of structural units, and is assembled into a proper length according to the requirement so as to meet the construction requirement. The girder 3 mainly contains longeron and horizontal antithetical couplet, and the longeron mainly bears the hoist and mount load, and the horizontal antithetical couplet mainly plays firm effect to the longeron.

In another technical solution, as shown in fig. 11 and 12, the upper end of the movable support is connected with the main beam 3 through two or one hinge supports 16, and the upper end of the fixed support is connected with the main beam 3 through one or two hinge supports 16.

In the above technical solution, as shown in fig. 11, when the movable support pushes laterally, in order to adapt to the height difference and the change of the longitudinal position between the movable support and the steel box girder 4 during the pushing process, the joint of the fixed support and the main girder 3 is connected by 1 hinge support 16, which is hinged and rotatable between the fixed support and the main girder 3, and hinged and non-rotatable between the movable support and the main girder 3 by 2 hinge supports 16. When the beam lifting station needs to push the direction to be converted, the fixed support and the movable support need to be reversed, and at the moment, the hinged support 16 connected with the main beam 3 needs to be reversed. As shown in fig. 12, the joints of the fixed supports and the main beams 3 are connected by 2 hinge supports 16, and the joints of the movable supports and the main beams 3 are connected by 2 hinge supports 16.

In another technical solution, as shown in fig. 2 to 4, the fixed leg 1 includes a sideslip skimming boat 11, a distribution beam 12, a steel pipe column 13, a longitudinal slide 14, a fixed frame 15, and a hinged support 16, which are sequentially arranged from bottom to top, the steel tube upright columns 13 are four and form a frame structure, the distribution beams 12 are a pair which are oppositely arranged along the longitudinal direction, the pair of distribution beams 12 are respectively and fixedly connected with the lower ends of two steel tube upright columns 13 in the same transverse direction, a sideslip sliding boat 11 is arranged at the position corresponding to each steel pipe upright post 13 under the distribution beam 12, which is arranged to slide in cooperation with the track, the fixed frame 15 is detachably connected with the top ends of the four steel tube upright posts 13, the hinged support 16 is connected with the main beam 3 and the top end of the fixed frame 15, the longitudinal sliding seat 14 is fixed at the center of the bottom of the fixed frame 15, and the connection cross beam 17 is connected on the fixed frame 15.

In the technical scheme, when the width size of the original web changes, the transverse sliding boats 11 are arranged at the lower ends of the fixed supporting legs 1 and the movable supporting legs 2, the rails are laid on the steel box girders 4, the transverse sliding boats 11 slide on the rails to realize the whole widening adjustment of the girder station, meanwhile, the length of the connection beam 17 is changed, and the whole structure of the girder station does not need to be repeatedly disassembled and assembled. The sideslip skier 11 is mainly used for the integral adjustment of the side of the fixed leg 1 when the girder station is widened. The distribution beam 12 is used for supporting the steel pipe upright 13, and is fixedly connected with the temporary pier 5 through bolts, so that stable support of fixed support is guaranteed. The steel pipe column 13 mainly bears the upper load. The arrangement of 1 hinged support 16 is used for adapting to the variation of the pushing height, and the arrangement of 2 hinged supports 16 is used for changing the pushing direction and fixing the rear support legs. During reversing, structures such as the lower steel pipe upright column 13 are removed, the fixing frame 15 is reserved for supporting, a rail and a longitudinal sliding seat are arranged at the contact position of the fixing frame 15 and the steel box girder 4 and can longitudinally slide, the longitudinal sliding seat is hinged, the gradient changes when the adaptive steel box girder 4 pushes the steel box girder, and the stress uniformity is ensured. When the original web plate position is changed from 1 to 2, the other slide rails are arranged at the new web plate position for stress conversion, and meanwhile, the lifting appliance 8 is also provided with the distribution beam 12 to adapt to the change of the web plate width position.

In another technical scheme, as shown in fig. 5 and 6, the movable support leg 2 includes a transverse sliding boat 11, longitudinal sliding seats 14, distribution beams 12, steel pipe columns 13, and hinged supports 16, which are sequentially arranged from bottom to top, the steel pipe columns 13 are four and form a frame structure, the distribution beams 12 are a pair which are oppositely arranged along the longitudinal direction, the pair of distribution beams 12 are respectively and fixedly connected to the lower ends of the two steel pipe columns 13 in the same transverse direction, two transverse sliding boats 11 and two longitudinal sliding seats 14 are respectively arranged at positions corresponding to the two steel pipe columns 13 under the distribution beams 12 in the same transverse direction, and the hinged supports 16 connect the main beam 3 and the top ends of the steel pipe columns 13.

In the technical scheme, the main structures of the movable supporting legs 2 and the fixed supporting legs 1 are the same, and the sideslip sliding boat 11 is mainly used for integrally adjusting the sides of the movable supporting legs 2 when the girder station is widened. The longitudinal sliding base 14 is mainly used for longitudinal sliding in the pushing process, and the longitudinal sliding base 14 is hinged with the distribution beam 12 to adapt to the influence of angle change. The distribution beam 12 is used to support the steel pipe column 13. The steel pipe column 13 mainly bears the upper load. The support leg fixing device is characterized in that 1 hinged support 16 is arranged for adapting to the variation of the pushing height after the pushing direction is changed, and 2 hinged supports 16 are arranged for fixing the support legs.

In another technical scheme, the lower end of the movable supporting leg 2 is slidably supported on the pushing steel box girder 4 through a sliding rail 7, the sliding rail 7 is detachably connected with the steel box girder 4, and the sliding rail 7 is of an assembling structure.

In the technical scheme, the sliding rail 7 is laid on the steel box girder 4, so that the sliding rail and the steel box girder 4 can slide relatively in the pushing process. When the steel box girder 4 is pushed at the movable support side, the movable support and the sliding track 7 are arranged in a sliding manner, namely, the longitudinal sliding seat 14 is arranged on the sliding track 7 in a sliding manner; when the width of the web of the steel box girder 4 changes, the sliding tracks 7 are detached and transversely arranged, and the transverse sliding boat 11 is matched with the sliding tracks 7 to slide, so that the transverse movement of the movable support legs 2 is realized, and the width change of the web is adapted. After the fixed supporting side is reversed, the laying sliding rail 7 realizes longitudinal relative movement.

In another technical scheme, as shown in fig. 8, the lifting mechanism 6 longitudinally moves along the main beam 3 through a longitudinal positioning system 9, the longitudinal positioning system 9 includes a longitudinal moving rail 91, a positioning base 92, a connecting beam 93, a positioning counter-force seat 94 and a positioning oil cylinder 95, the longitudinal moving rail 91 is longitudinally laid on the main beam 3, the positioning base 92 is a pair and is arranged on the longitudinal moving rail 91 at intervals in a sliding manner, the pair of positioning bases 92 are connected through the connecting beam 93, the positioning counter-force seat 94 is fixed on the main beam 3, a cylinder body of the positioning oil cylinder 95 is fixed on the positioning counter-force seat 94, an expansion rod of the positioning oil cylinder 95 is connected with the positioning base 92, and the lifting mechanism 6 is fixed on the positioning base 92.

In the technical scheme, the longitudinal position of the steel box girder 4 is adjusted by the girder lifting station through the longitudinal position adjusting system 9 on the top surface of the main girder 3. The lifting mechanism 6 can be provided with a plurality of, the corresponding positioning bases 92 are also provided with a plurality of, the adjacent positioning bases 92 are connected into a whole through the connecting beam 93, the longitudinal moving rail 91 is installed and fixed above the main beam 3, and the positioning bases 92 and the positioning counter-force bases 94 can slide and position above the longitudinal moving rail 91 through the extension and retraction of the positioning oil cylinder 95 so as to meet the requirement of the longitudinal installation position of the steel box girder 4.

In another technical scheme, as shown in fig. 9, the lifting appliance 8 includes a connection anchor head 81, a matching beam 82, and ear plates 83, the connection anchor head 81 is connected with the lifting mechanism 6, the middle portion of the matching beam 82 is connected with the connection anchor head 81 through a pin, the ear plates 83 are 3 groups and are arranged on the matching beam 82 at intervals, and each group of ear plates 83 is connected with the steel box beam 4 through a connection pin.

In the above technical solution, the connection anchor head 81 is mainly connected with the lower clamping anchor of the lifting jack of the lifting mechanism 6. The connection anchor head 81 and the mating beam 82 are connected by an anchor head connection pin. The mating beam 82 has attachment lugs 83 grouped into 3 groups to accommodate attachment of the lugs 83 at a single location and 2 locations after web change, one location being attached to the lug 83 at the center and two locations being attached to the lugs 83 on either side. The box girder connecting pin shaft connects the whole lifting appliance 8 with the steel box girder 4.

In another technical solution, as shown in fig. 10, the fixed leg 1 is anchored to the temporary pier 5 by a temporary support 18 and finish-rolled deformed steel bar 19, the temporary support 18 is supported between the distribution beam 12 and the upper surface of the temporary pier 5, and the finish-rolled deformed steel bar 19 is screwed to connect the distribution beam 12 and the temporary pier 5.

In the technical scheme, the temporary support 18 and the finish-rolled deformed steel bar 19 act together to firmly lock the fixed supporting leg 1 of the lifting beam station and prevent the bottom position of the fixed supporting leg 1 from changing. And a limiting clamping plate can be arranged and matched with the transverse moving sliding boat 11 or the longitudinal moving sliding seat 14 at the bottom in shape, and the limiting clamping plate is clamped at two sides to limit the transverse moving sliding boat.

The invention also provides a girder lifting station pushing process suitable for the change of the web plate of the steel box girder, which comprises the following steps as shown in figures 13 to 16:

the method comprises the following steps: the pushing of the side of the movable supporting leg 2 is completed, the locking of the fixed supporting leg 1 is released, namely the temporary support 18 and the finish rolling deformed steel bar 19 are removed, meanwhile, the connection cross beams 17 of the movable supporting leg 2 and the fixed supporting leg 1 are respectively removed, and the girder lifting station is converted into supporting leg stress at two transverse sides;

step two: the main beams 3, the movable supporting legs 2 and the fixed supporting legs 1 on the two transverse sides of the girder station respectively move transversely, after the main beams move transversely to meet the requirements of the web plate of the steel box girder 4, temporary locking is installed, the supporting legs are fixed, and then a connection cross beam 17 is installed to connect the fixed supporting legs 1 or the movable supporting legs 2 on the two transverse sides;

step three: a movable supporting leg 2 below a main beam 3 of the lifting beam station is converted with a hinged support 16 of a fixed supporting leg 1 to prepare for reversing, an assembling platform at the side of the movable supporting leg 2 is installed to the side of the fixed supporting leg 1, and pushing preparation is carried out;

step four: after the pushing preparation is finished, a pair of longitudinal beams of the pushing guide beam respectively penetrate through the space inside the pair of fixed supporting legs 1, and then a cross beam between the pair of main beams 3 is installed;

step five: and (3) paving a sliding rail 7 on a longitudinal beam of the guide beam, matching a longitudinal sliding seat 14 on the fixed supporting leg 1 on the sliding rail 7, removing a lower structure of the fixed supporting leg 1, and normally installing and pushing the steel box girder 4 forwards.

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 lifting beam station suitable for steel box girder web changes, a serial communication port, including girder, movable support, fixed stay, hoist mechanism, the fixed stay includes from top to bottom can dismantle the two parts of connection, the fixed stay lower extreme sets up to dismantle and is fixed in on the interim mound, the activity is supported the lower extreme and is set up to sliding support on pushing away the steel box girder, the girder along the vertical setting of bridge and both ends connect respectively in fixed stay and movable support upper end, the fixed stay transversely includes that a plurality of constitutional units can dismantle the combination so that fixed stay and movable support adjust horizontal width, the hoist passes through hoist mechanism and connects, hoist mechanism sets up to the edge girder longitudinal movement, the hoist is used for lifting by crane the steel box girder.

2. The girder station suitable for steel box girder web change of claim 1, wherein the movable support comprises a pair of movable legs arranged at intervals in the transverse direction, the pair of movable legs are connected through a length-adjustable connection cross beam, the fixed support comprises a pair of fixed legs arranged at intervals in the transverse direction, the upper parts of the pair of fixed legs are also connected through a length-adjustable connection cross beam, the girders are a pair and arranged at intervals in the transverse direction, each pair of girders comprises a pair of longitudinal girders, the pair of longitudinal girders are connected into a whole through a plurality of transverse connections, and two ends of each pair of girders are respectively and correspondingly connected with a fixed leg and a movable leg in the same longitudinal direction.

3. The girder station of claim 1, wherein the upper ends of the movable supports are connected to the main girder by two or more hinge supports, and the upper ends of the fixed supports are connected to the main girder by one or two hinge supports.

4. The girder station suitable for steel box girder web change of claim 2, wherein the fixed support legs comprise a transverse moving slide boat, a distribution beam, steel pipe columns, a longitudinal moving slide carriage, a fixed frame and a hinged support which are sequentially arranged from bottom to top, the steel pipe columns are four and form a frame structure, the distribution beam is a pair which is oppositely arranged along the longitudinal direction, the pair of distribution beams are respectively and fixedly connected with the lower ends of two steel pipe columns in the same transverse direction, the transverse moving slide boat is arranged at the position corresponding to each steel pipe column below the distribution beam and is arranged to slide in a matching manner with a track, the fixed frame is detachably connected with the top ends of the four steel pipe columns, the hinged support connects the main beam with the top end of the fixed frame, the longitudinal moving slide carriage is hinged with the center of the bottom of the fixed frame, and the connection beam is connected with the.

5. The girder station suitable for steel box girder web plate change of claim 2, wherein the movable support legs comprise a traverse sliding boat, a longitudinal sliding seat, distribution beams, steel pipe columns and a hinge support which are sequentially arranged from bottom to top, the steel pipe columns are four and form a frame structure, the distribution beams are a pair which are oppositely arranged along the longitudinal direction, a pair of distribution beams are respectively and fixedly connected with the lower ends of the two steel pipe columns in the same transverse direction, two traverse sliding boats and two longitudinal sliding seats are respectively arranged at positions corresponding to the two steel pipe columns under the distribution beams in the same transverse direction, and the hinge support is connected with the top ends of the main beam and the steel pipe columns.

6. The girder station suitable for steel box girder web change of claim 2, wherein the lower end of the movable support leg is slidably supported on the pushing steel box girder through a sliding track, the sliding track is detachably connected with the steel box girder, and the sliding track is of an assembled structure.

7. The beam lifting station suitable for steel box girder web change of claim 1, wherein the lifting mechanism moves longitudinally along the main beam through a longitudinal positioning system, the longitudinal positioning system comprises a longitudinal moving rail, positioning bases, a connecting beam, positioning counter-force seats and positioning oil cylinders, the longitudinal moving rail is longitudinally laid on the main beam, the positioning bases are arranged on the longitudinal moving rail in a pair and are arranged on the longitudinal moving rail in a sliding mode at intervals, the positioning bases are connected through the connecting beam, the positioning counter-force seats are fixed on the main beam, the positioning oil cylinder bodies are fixed on the positioning counter-force seats, the positioning oil cylinder telescopic rods are connected with the positioning bases, and the lifting mechanism is fixed on the positioning bases.

8. The beam lifting station suitable for steel box girder web change of claim 1, wherein the lifting appliance comprises a connection anchor head, a matching beam and lug plates, the connection anchor head is connected with the lifting mechanism, the middle part of the matching beam is connected with the connection anchor head through a pin shaft, the lug plates are 3 groups and are arranged on the matching beam at intervals, and each group of lug plates is connected with the steel box girder through a connection pin shaft.

9. The girder station of claim 1, wherein the fixed legs are anchored to the temporary pier by a temporary support and finish-rolled deformed steel bar, the temporary support is supported between the distributor beam and an upper surface of the temporary pier, and the finish-rolled deformed steel bar is threadedly coupled between the distributor beam and the temporary pier.

10. A beam lifting station pushing process suitable for steel box girder web plate change is characterized by comprising the following steps:

the method comprises the following steps: the movable supporting leg side pushing is completed, the locking of the fixed supporting leg is released, namely the temporary support and the finish rolling deformed steel bar are removed, meanwhile, the connection cross beams of the movable supporting leg and the fixed supporting leg are respectively removed, and the girder lifting station is converted into supporting leg stress on the two transverse sides;

step two: the main beams at the two transverse sides of the girder station, the movable supporting legs and the fixed supporting legs respectively move transversely, after the main beams move transversely to meet the requirements of a steel box girder web plate, temporary locking is installed, the supporting legs are fixed, and then the fixed supporting legs or the movable supporting legs which are connected with the transverse beams and are connected with the two transverse sides are installed;

step three: converting a movable support leg and a fixed support leg hinged support below a main beam of the lifting beam station, preparing for reversing, installing an assembling platform at the side of the movable support leg to the side of the fixed support leg, and preparing for pushing;

step four: after the pushing preparation is finished, a pair of longitudinal beams of the pushing guide beam respectively penetrate through the space inside the pair of fixed supporting legs, and then a cross beam between the pair of main beams is installed;

step five: and laying a sliding track on a longitudinal beam of the guide beam, matching a longitudinally-moving sliding seat on the fixed supporting leg on the sliding track, removing a lower structure of the fixed supporting leg, and normally installing and pushing the steel box beam forwards.

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