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

Abstract

The invention discloses a beam lifting station suitable for changing the web of a steel box girder, comprising a main beam, a movable support, a fixed support, a sling, and a lifting mechanism. The lower end of the support is arranged to be slidingly supported on the pushing steel box girder, the main beam is arranged along the longitudinal direction of the bridge, the lateral width of the fixed support and the movable support can be adjusted, the spreader is connected by a lifting mechanism, and the lifting mechanism It is arranged to move longitudinally along the main beam. The invention also discloses a jacking process of the beam lifting station suitable for the change of the web of the steel box beam. According to the needs of the steel box girder assembling web and the pushing direction, the present invention designs the beam lifting station into various adjustable modes, so as to adapt to the changes in the width and position of the steel box girder web, and to adapt to the pushing requirements of the steel box girder in different directions. There is no need to repeatedly disassemble and assemble the beam-lifting station structure, and in the case of safety and efficiency, the structural function conversion can be carried out to ensure the construction needs.

Description

Beam-lifting station suitable for steel box girder web change and its jacking technique

technical field

The invention relates to the field of bridge construction equipment. More specifically, the present invention relates to a beam lifting station and its jacking process suitable for changing the web of a steel box girder.

Background technique

In bridge construction, beam lifting stations are widely used when large-section steel box girder members are lifted or installed as a whole. However, due to the different design structures of different large-segment box girders, especially when steel box girders with different cross-section types and stress characteristics are lifted at one location, the structural arrangement of the beam-lifting station and the force safety of the steel box girders are very important. There are certain requirements to meet the requirements of safe construction.

At the same time, during the jacking construction of the steel box girder bridge, for the girder station structure with the outriggers falling on the bridge deck, it is necessary to adapt to the change in the positional relationship between the girder station and the steel box girder during the jacking process, so as to avoid unfavorable stress patterns. impact to ensure structural safety.

The steel box girder beam lifting station usually used for jacking is often used in that one end of the outrigger falls on the steel box girder and the other end is fixed due to the wide width of the steel box girder. It needs to correspond to the position of the steel box girder web. When the width, position and pushing direction of the steel box girder web change, the previous structure is often no longer suitable for the lifting and pushing process. new demands.

SUMMARY OF THE INVENTION

One object of the present invention is to provide a beam lifting station and its jacking process suitable for the change of the web of the steel box girder. It adapts to the changes in the web width and position of the steel box girder, and adapts to the pushing requirements of the steel box girder in different directions, without the need to repeatedly disassemble and assemble the beam-lifting station structure.

In order to achieve these objects and other advantages according to the present invention, there is provided a beam lifting station suitable for changing the web of a steel box girder, comprising a main beam, a movable support, a fixed support, a spreader, and a lifting mechanism, the fixed support including upper and lower The two parts are detachably connected, the lower end of the fixed support is arranged to be detachably fixed on the temporary pier, the lower end of the movable support is arranged to be slidably supported on the pushing steel box girder, the main beam is arranged along the longitudinal direction of the bridge and two The ends are respectively connected to the upper ends of the fixed support and the movable support. The horizontal direction of the fixed support and the movable support includes a plurality of structural units that can be detachably combined so that the fixed support and the movable support can adjust the lateral width. connected, the lifting mechanism is arranged to move longitudinally along the main beam, and the spreader is used for lifting the steel box beam.

Preferably, the movable support includes a pair of movable legs, which are arranged at intervals along the lateral direction, and the pair of movable legs is connected by a connecting beam with an adjustable length, and the fixed support includes a pair of fixed legs that are spaced apart along the lateral direction. The upper part of a pair of fixed legs is also connected by connecting beams with adjustable lengths, the main beams are a pair and are arranged at intervals along the transverse direction, each pair of main beams includes a pair of longitudinal beams, and a pair of longitudinal beams pass through a plurality of transverse beams. The connection is integrated as a whole, and the two ends of each pair of main beams are respectively connected to a fixed leg and a movable leg in the same longitudinal direction.

Preferably, the upper end of the movable support and the main beam are connected by two or one hinge supports, and the upper end of the fixed support and the main beam are connected by one or two hinge supports.

Preferably, the fixed outriggers include a transverse sliding boat, a distribution beam, a steel pipe column, a longitudinal sliding seat, a fixed frame, and a hinge support arranged in sequence from bottom to top, and the steel pipe columns are four and form a frame structure , the distribution beams are a pair arranged opposite to each other in the longitudinal direction, and the pair of distribution beams are respectively fixed and connected to the lower ends of two steel pipe columns in the same transverse direction, and a transverse skid is arranged under the distribution beams corresponding to the positions of each steel pipe column. In order to cooperate and slide with the track, the fixing frame is detachably connected to the top ends of the four steel pipe columns, the hinge support connects the main beam and the top end of the fixing frame, and the longitudinal sliding seat is hinged to the fixing frame. The bottom center of the frame, the connecting beam is connected to the fixing frame.

Preferably, the movable outriggers include a transverse sliding boat, a longitudinal sliding seat, a distribution beam, a steel pipe column, and a hinge support, which are arranged in sequence from bottom to top, and the steel pipe columns are four and constitute a frame structure. The distribution beams are a pair arranged opposite to each other in the longitudinal direction. The pair of distribution beams are respectively fixed and connected to the lower ends of the two steel pipe uprights in the same transverse direction. Two transverse sliding skids and two steel pipe uprights are respectively arranged under the distribution beams in the same transverse direction at the positions corresponding to the two steel pipe uprights. A longitudinal sliding seat, the hinge support connects the main beam and the top end of the steel pipe column.

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

Preferably, the lifting mechanism moves longitudinally along the main beam through a longitudinal positioning system, and the longitudinal positioning system includes a longitudinal moving rail, a positioning base, a connecting beam, a positioning reaction force seat and a positioning oil cylinder. The shifting rails are laid longitudinally on the main beam, the position-adjusting bases are a pair and are slidably arranged on the longitudinal shifting rails at intervals. On the main beam, the position adjustment oil cylinder body is fixed on the position adjustment reaction force seat, the position adjustment oil cylinder telescopic rod is connected to the position adjustment base, and the lifting mechanism is fixed on the position adjustment base.

Preferably, the spreader includes a connecting anchor head, a matching beam, and an ear plate, the connecting anchor head is connected with the lifting mechanism, the middle part of the matching beam and the connecting anchor head are connected by a pin, and the ear plates are in three groups and are arranged on the matching beams at intervals, and each group of ear plates is connected with the steel box beam by connecting pins.

Preferably, the fixed legs are anchored on the temporary pier through a temporary bearing and a finishing threaded steel, the temporary bearing is supported between the distribution beam and the upper surface of the temporary pier, and the finishing threaded steel is threaded. Connect the distribution beam to the temporary pier.

The invention also discloses a beam-lifting station jacking process suitable for the change of the web of the steel box girder, comprising the following steps:

Step 1: The side push of the movable outrigger is completed, and the locking of the fixed outrigger is released, that is, the temporary support and the finishing rebar are removed. The outriggers on both sides are stressed;

Step 2: The main beams, movable outriggers and fixed outriggers on the lateral sides of the beam-lifting station are moved laterally respectively. After the lateral movement meets the requirements of the steel box girder web, install temporary locking, fix each leg, and then install the connection beam connection Fixed outriggers or movable outriggers on both lateral sides;

Step 3: Convert the movable outrigger and the fixed outrigger hinge support under the main beam of the beam-lifting station to prepare for reversing, install the assembly platform on the movable outrigger side to the fixed outrigger side, and prepare for pushing;

Step 4: After the jacking preparation is completed, pass the pair of longitudinal beams of the jacking guide beam through the space inside the pair of fixed legs respectively, and then install the cross beam between the pair of main beams;

Step 5: Lay the sliding track on the longitudinal beam of the guide beam, the longitudinal sliding seat on the fixed outrigger is matched with the sliding track, remove the lower structure of the fixed outrigger, and install the steel box girder normally and push it forward.

The present invention includes at least the following beneficial effects:

The beam lifting station of the invention can adapt to the changes of the height and slope of the steel box girder during the jacking construction of the steel box girder, and can also adapt to the adverse effects of different web widths and changes of the web width of the steel box girder. Influenced by the change of the force system after the direction change, especially when the multi-joint variable web steel box girder is pushed in both directions, this design method can realize the hoisting operation of the beam-lifting station and the width of the beam-lifting station and the direction of the jacking at one point. The transformation construction does not require repeated disassembly and assembly, and the construction efficiency is high.

Other advantages, objects, and features of the present invention will appear in part from the description that follows, and in part will be appreciated by those skilled in the art from the study and practice of the invention.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the beam lifting station of the present invention;

Fig. 2 is the front view of the fixed outrigger of the present invention;

Fig. 3 is the side view when the fixed outrigger of the present invention is not reversed;

Figure 4 is a side view of the fixed outrigger of the present invention after reversing;

Fig. 5 is the front view of the movable outrigger of the present invention;

Fig. 6 is the side view when the movable outrigger of the present invention moves laterally;

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

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

Fig. 9 is the structural representation of the spreader of the present invention;

10 is a schematic structural diagram of the anchoring of the fixed outriggers of the present invention;

Figure 11 is a schematic diagram of the side pushing structure of the movable outrigger of the present invention;

Figure 12 is a schematic diagram of the side push structure of the fixed outrigger of the present invention;

13 is a schematic structural diagram of step one of the jacking process of the present invention;

14 is a schematic structural diagram of step three of the jacking process of the present invention;

15 is a schematic structural diagram of step four of the jacking process of the present invention;

FIG. 16 is a schematic structural diagram of step five of the jacking process of the present invention.

Description of reference numbers:

1. Fixed outriggers, 11. Transverse skid, 12. Distribution beam, 13. Steel pipe column, 14. Longitudinal sliding seat, 15. Fixed frame, 16. Hinged support, 17. Connecting beam, 18. Temporary support Block, 19. Finishing rolled rebar, 2. Active outriggers, 3. Main beam, 4. Steel box girder, 5. Temporary pier, 6. Lifting mechanism, 7. Sliding track, 8. Spreader, 81. Connection Anchor head, 82, matching beam, 83, lug plate, 9, longitudinal adjustment system, 91, longitudinal movement track, 92, adjustment base, 93, connecting beam, 94, adjustment reaction force seat, 95, adjustment oil cylinder .

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, The terms "landscape", "portrait", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", The orientation or positional relationship indicated by "inside" and "outside" is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated device or element must have The particular orientation, construction and operation in the particular orientation are therefore not to be construed as limitations of the invention.

As shown in FIG. 1 , the present invention provides a beam lifting station suitable for changing the web of a steel box girder. The lower end of the fixed support is arranged to be detachably fixed on the temporary pier 5, the lower end of the movable support is arranged to be slidably supported on the pushing steel box girder 4, and the main beam 3 is arranged along the longitudinal direction of the bridge and The two ends are respectively connected to the upper ends of the fixed support and the movable support. The horizontal direction of the fixed support and the movable support includes a plurality of detachable combinations of structural units, so that the fixed support and the movable support can adjust the lateral width. A lifting mechanism 6 is connected, the lifting mechanism 6 is arranged to move longitudinally along the main beam 3 , and the hoisting tool 8 is used for lifting the steel box beam 4 .

In the above technical solution, as shown in FIG. 1 , the fixed support and the movable support connecting the main beam 3 constitute the structure of the whole beam lifting station. The reversing process is as follows: as shown in Figure 11, the steel box girder 4 is pushed on the movable support side. At this time, the fixed support is fixed on the temporary pier 5 and does not move to ensure the stability of the entire beam lifting station, and the movable support and the steel box girder 4 are maintained. For relative sliding, a track can be set on the steel box girder 4, and the lower end of the movable support slides in the track; as shown in Figure 12, the push direction is reversed, and the steel box girder 4 is pushed on the fixed support side. Partially dismantled, the lower part is dismantled, slide rails are set on the steel box girder 4, and the upper part of the fixed support slides on the steel box girder 4 to realize the push of the steel box girder 4. At this time, the movable support is fixedly supported on the steel box on beam 4. The change process of the 4-web of the steel box girder: the horizontal direction of the fixed support and the movable support includes multiple structural units, and they are detachably connected. According to the change of the 4-web of the steel box girder, dismantle redundant structural units or assemble more structural units to realize the beam lifting station Adapt to the change of 4 webs of steel box girder. The steel box girder 4 is connected to the beam lifting station by the hanger 8, and the steel box girder 4 is lifted by the lifting mechanism 6, and the lifting mechanism 6 can move longitudinally along the main beam 3, so as to realize the longitudinal walking alignment and pushing of the steel box beam 4 , and the lifting mechanism 6 includes a lifting jack system and a steel strand winding device to lift the steel box girder 4 as a whole. The lifting jack system is the power to lift the steel box girder 4 upward, and the steel strand winding device is to lift the The strands used in the jacking system are wound into coils to prevent disturbance or damage.

In another technical solution, as shown in Figures 2 to 7, the movable support includes a pair of movable legs 2, which are arranged at intervals along the lateral direction, and the pair of movable legs 2 are connected by a connecting beam 17 with an adjustable length, The fixed support includes a pair of fixed legs 1, which are arranged at intervals along the lateral direction. The upper part of the pair of fixed legs 1 is also connected by a connecting beam 17 with an adjustable length. The main beams 3 are a pair and are arranged at intervals along the lateral direction. Each pair of main beams 3 includes a pair of longitudinal beams, a pair of longitudinal beams are connected together by a plurality of transverse links, and the two ends of each pair of main beams 3 are respectively connected to a fixed leg 1 and a movable leg 2 in the same longitudinal direction. .

In the above technical solution, both the fixed support and the movable support include a pair of outriggers, and the pair of outriggers are connected by a connecting beam 17. The length of the connecting beam 17 is adjustable, that is, the distance between the pair of legs can be adjusted. Adjustment, that is, the width of the fixed support and the movable support can be adjusted to adapt to the change of the web of the steel box girder 4. The connecting beam 17 is detachably assembled from a plurality of structural units, and can be assembled into a suitable length according to the needs to meet the construction requirements. The main beam 3 mainly includes longitudinal beams and transverse links, the longitudinal beams mainly bear the hoisting load, and the transverse links mainly play a stabilizing role for the longitudinal beams.

In another technical solution, as shown in FIGS. 11 and 12 , the upper end of the movable support and the main beam 3 are connected by two or one hinge supports 16 , and the upper end of the fixed support is connected to the main beam 3 . The beams 3 are connected by one or two hinge supports 16 .

In the above technical solution, as shown in Figure 11, when the movable support side is pushed, in order to adapt to the change of the height difference and the longitudinal position between the movable support and the steel box girder 4 during the pushing process, the connection between the fixed support and the main beam 3 adopts 1 The hinge supports 16 are connected, that is, the fixed support and the main beam 3 are hinged and rotatable, and the movable support and the main beam 3 are hinged and non-rotatable by two hinge supports 16 . When the lifting direction of the beam lifting station needs to be changed, the fixed support and the movable support need to be reversed. As shown in FIG. 12 , at this time, the connection between the fixed support and the main beam 3 is connected by two hinge supports 16 , and the connection between the movable support and the main beam 3 is connected by two hinge supports 16 .

In another technical solution, as shown in FIGS. 2 to 4 , the fixed outriggers 1 include a transverse sliding skid 11 , a distribution beam 12 , a steel pipe column 13 , a longitudinal sliding seat 14 , and a fixed The frame 15, the hinge support 16, the steel pipe uprights 13 are four and form a frame structure, the distribution beams 12 are a pair arranged opposite to each other in the longitudinal direction, and the pair of distribution beams 12 are respectively fixed to connect two steel pipe uprights in the same horizontal direction 13. The lower end of the distribution beam 12 is provided with a traverse skid 11 at the position corresponding to each steel pipe column 13, which is arranged to cooperate with the track to slide, and the fixing frame 15 is detachably connected to the top of the four steel pipe columns 13. , the hinge support 16 connects the main beam 3 and the top of the fixing frame 15, the longitudinal sliding base 14 is fixed at the bottom center of the fixing frame 15, and the connecting beam 17 is connected to the fixing frame on rack 15.

In the above technical solution, when the width of the original web changes, by setting the traverse skid 11 at the lower ends of the fixed outrigger 1 and the movable outrigger 2, and laying tracks on the steel box beam 4, the traverse skid 11 is Sliding on the track realizes the overall width adjustment of the beam-lifting station, and at the same time changes the length of the connecting beam 17, and the overall structure of the beam-lifting station does not need to be disassembled and assembled repeatedly. The traverse skid 11 is mainly used for the overall adjustment of the side of the fixed outrigger 1 when the beam lifting station becomes wider. The distribution beam 12 is used to support the steel pipe column 13, and at the same time, it is fixedly connected by bolts equal to the temporary pier 5 to ensure the stable support of the fixed support. The steel pipe column 13 mainly bears the upper load. One hinge support 16 is provided for adapting to the change of the jacking height, and two hinge supports 16 are provided for changing the jacking direction and the legs are fixed. When reversing, remove the lower steel pipe column 13 and other structures, and retain the fixed frame 15 for support. The fixed frame 15 and the steel box girder 4 are provided with rails and longitudinal sliding seats, which can slide longitudinally. The longitudinal sliding seat is hinged and adaptable steel. When the box girder 4 is pushed, the slope changes to ensure uniform stress. When the original web position is changed from 1 to 2, the force conversion is performed by setting another slide rail at the new web position, and the spreader 8 is also provided with a distribution beam 12 to adapt to the change of the web width position.

In another technical solution, as shown in FIG. 5 and FIG. 6 , the movable outrigger 2 includes a transverse sliding skid 11, a longitudinal sliding seat 14, a distribution beam 12, a steel pipe column 13, The hinge support 16, the steel pipe uprights 13 are four and form a frame structure, the distribution beams 12 are a pair arranged opposite to each other in the longitudinal direction, and the pair of distribution beams 12 are respectively fixed and connected to the lower ends of the two steel pipe uprights 13 in the same horizontal direction, Two transverse sliding boats 11 and two longitudinal sliding seats 14 are respectively arranged under the distribution beam 12 in the same transverse direction at the positions corresponding to the two steel pipe uprights 13 , and the hinge supports 16 connect the main beam 3 and the The top end of the steel pipe column 13 .

In the above technical solution, the main structure of the movable outrigger 2 and the fixed outrigger 1 is the same, and the traverse skid 11 is mainly used for the overall adjustment of the side of the movable outrigger 2 when the beam lifting station becomes wider. The longitudinal sliding seat 14 is mainly used for longitudinal sliding during the pushing process, and the longitudinal sliding seat 14 and the distribution beam 12 are hinged to adapt to the influence of the 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. One hinge support 16 is arranged to adapt to the change of the jacking height after changing the pushing direction, and two hinge supports 16 are arranged for fixing the legs.

In another technical solution, the lower end of the movable outrigger 2 is slidably supported on the pushing steel box girder 4 through a sliding track 7, and the sliding track 7 is detachably connected to the steel box girder 4, and the The sliding track 7 is an assembled structure.

In the above technical solution, by laying the sliding rail 7 on the steel box girder 4, during the pushing process, relative sliding with the steel box girder 4 is ensured. When the steel box girder 4 is pushed on the movable support side, the movable support and the sliding track 7 are relatively slidably arranged, that is, the longitudinal sliding seat 14 is slidably arranged on the sliding track 7; when the web width of the steel box girder 4 changes, The sliding track 7 is dismantled and arranged horizontally. At this time, the traverse skid 11 slides on the sliding track 7 to realize the lateral movement of the movable outriggers 2, thereby realizing the adaptation to the change of the width of the web. After the fixed support side is reversed, the sliding track 7 is laid to realize the relative movement in the longitudinal direction.

In another technical solution, as shown in FIG. 8 , the lifting mechanism 6 moves longitudinally along the main beam 3 through a longitudinal positioning system 9 , and the longitudinal positioning system 9 includes a longitudinal moving rail 91 , a positioning base 92 , The connecting beam 93, the position adjusting reaction force seat 94 and the position adjusting oil cylinder 95, the longitudinal movement rail 91 is longitudinally laid on the main beam 3, the position adjustment bases 92 are a pair and are slidably arranged on the longitudinal movement On the track 91 , a pair of position adjustment bases 92 are connected by connecting beams 93 , the position adjustment reaction force seat 94 is fixed on the main beam 3 , and the cylinder body of the position adjustment oil cylinder 95 is fixed on the position adjustment reaction force seat 94 The telescopic rod of the position adjusting oil cylinder 95 is connected to the position adjusting base 92 , and the lifting mechanism 6 is fixed on the position adjusting base 92 .

In the above technical solution, the beam lifting station adjusts the longitudinal position of the steel box beam 4 through the longitudinal positioning system 9 on the top surface of the main beam 3 . A plurality of lifting mechanisms 6 can be provided, and a plurality of corresponding positioning bases 92 can also be provided. Adjacent positioning bases 92 are connected together by connecting beams 93. Longitudinal shifting rails 91 are installed and fixed above the main beam 3. The expansion and contraction of the oil cylinder 95 , the position adjustment base 92 and the position adjustment reaction force seat 94 can be slid and adjusted above the longitudinal movement track 91 to meet the requirements of the longitudinal installation position of the steel box beam 4 .

In another technical solution, as shown in FIG. 9 , the spreader 8 includes a connecting anchor head 81 , a matching beam 82 and an ear plate 83 , the connecting anchor head 81 is connected to the lifting mechanism 6 , and the matching beam 82 The middle part is connected with the connecting anchor head 81 by pins, the ear plates 83 are arranged in three groups and are arranged on the matching beam 82 at intervals, and each group of ear plates 83 is connected with the steel box girder 4 by connecting pins.

In the above technical solution, the connecting anchor head 81 is mainly connected with the lower clamping anchor of the lifting jack of the lifting mechanism 6 . The connecting anchor head 81 and the matching beam 82 are connected by the connecting pin of the anchor head. There are connecting lugs 83 on the matching beam 82, which are divided into 3 groups. They are mainly adapted to the connection of a single position and two positions of the lugs 83 after the web is changed. When a single position is connected to the lug 83 in the middle, the two positions When connected to the two lugs 83 on both sides. The box girder connecting pin connects the entire spreader 8 to the steel box girder 4 .

In another technical solution, as shown in FIG. 10 , the fixed leg 1 is anchored on the temporary pier 5 through a temporary support 18 and a finishing threaded steel 19 , and the temporary support 18 is supported on the distribution beam Between 12 and the upper surface of the temporary pier 5 , the finish-rolled rebar 19 is threadedly connected to the distribution beam 12 and the temporary pier 5 .

In the above technical solution, the temporary support 18 and the finishing threaded steel 19 work together to lock the fixed legs 1 of the beam-lifting station firmly to prevent the bottom position of the fixed legs 1 from changing. A limit card plate can also be provided, which matches the shape of the lateral sliding boat 11 or the longitudinal sliding seat 14 at the bottom, and is clamped on both sides to limit the position.

The present invention also provides a beam-lifting station jacking process suitable for changing the web of the steel box girder, as shown in Figures 13 to 16, including the following steps:

Step 1: The side push of the movable outrigger 2 is completed, and the locking of the fixed outrigger 1 is released, that is, the temporary support 18 and the finishing threaded steel 19 are removed, and the connecting beam 17 of the movable outrigger 2 and the fixed outrigger 1 is removed respectively. , convert the beam lifting station to the outriggers on both sides of the transverse direction;

Step 2: The main beam 3 on the lateral sides of the beam lifting station, the movable outrigger 2 and the fixed outrigger 1 are respectively moved laterally, and after the lateral movement meets the requirements of the web plate of the steel box girder 4, the temporary locking is installed, the legs are fixed, and then Install the connecting beam 17 to connect the fixed legs 1 or the movable legs 2 on both sides of the transverse direction;

Step 3: The movable outrigger 2 under the main beam 3 of the beam-lifting station and the hinged support 16 of the fixed outrigger 1 are converted to prepare for reversing. push preparation;

Step 4: After the jacking preparation is completed, pass the pair of longitudinal beams of the jacking guide beam through the space inside the pair of fixed legs 1 respectively, and then install the cross beam between the pair of main beams 3;

Step 5: Lay the sliding rail 7 on the longitudinal beam of the guide beam, the longitudinal sliding seat 14 on the fixed outrigger 1 is matched with the sliding rail 7, remove the lower structure of the fixed outrigger 1, and install the steel box beam 4 normally. Push forward.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the application listed in the description and the embodiment, and it can be applied to various fields suitable for the present invention. For those skilled in the art, it can be easily Therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (10)

1. The beam lifting station suitable for the change of the web of the steel box girder is characterized in that it includes a main beam, a movable support, a fixed support, a spreader, and a lifting mechanism, and the fixed support includes two parts that are detachably connected up and down, and the fixed support The lower end of the support is arranged to be detachably fixed on the temporary pier, the lower end of the movable support is arranged to be slidably supported on the pushing steel box girder, the main beam is arranged along the longitudinal direction of the bridge, and the two ends are respectively connected to the fixed support and the movable support. The upper end of the support is supported, and the lateral direction of the fixed support and the movable support includes a detachable combination of a plurality of structural units, so that the fixed support and the movable support can adjust the lateral width, and the sling is connected by a lifting mechanism, and the lifting mechanism is arranged along the The main beam moves longitudinally, and the spreader is used to lift the steel box beam. 2. The beam lifting station suitable for the change of the web of the steel box girder according to claim 1, wherein the movable support comprises a pair of movable legs, which are arranged at intervals along the transverse direction, and the pair of movable legs can pass through the length of the movable legs. The fixed support includes a pair of fixed legs, which are arranged at horizontal intervals, and the upper part of the pair of fixed legs is also connected by a length-adjustable connecting beam, and the main beams are a pair and are spaced horizontally. Each pair of main beams includes a pair of longitudinal beams, a pair of longitudinal beams are connected as a whole by a plurality of transverse links, and two ends of each pair of main beams are respectively connected to a fixed leg and a movable leg in the same longitudinal direction. 3. The beam-lifting station suitable for changing the web of a steel box girder according to claim 1, wherein the upper end of the movable support and the main beam are connected by two or one hinge support, and the fixed The upper end of the support and the main beam are connected by one or two hinge supports. 4. The beam lifting station suitable for the change of the web of the steel box girder according to claim 2, characterized in that the fixed outriggers comprise a transverse skid, a distribution beam, a steel pipe column, a longitudinally arranged from bottom to top The sliding seat, the fixing frame and the hinge support, the steel pipe columns are four and form a frame structure, the distribution beams are a pair arranged opposite to each other in the longitudinal direction, and the pair of distribution beams are respectively fixed and connected to the lower ends of the two steel pipe columns in the same horizontal direction. A traverse skid is arranged under the distribution beam at the position corresponding to each steel pipe column, which is set to cooperate with the track to slide, the fixing frame is detachably connected to the top of the four steel pipe columns, and the hinge support is connected to the The main beam and the top of the fixing frame, the longitudinal sliding seat is hinged to the bottom center of the fixing frame, and the connecting beam is connected to the fixing frame. 5. The beam lifting station suitable for the change of the web of the steel box girder according to claim 2, characterized in that, the movable outriggers comprise transverse sliding skids, longitudinal sliding blocks, distribution beams, Steel pipe uprights and hinge supports, the steel pipe uprights are four and form a frame structure, the distribution beams are a pair arranged opposite to each other in the longitudinal direction, and the pair of distribution beams are respectively fixed and connected to the lower ends of the two steel pipe uprights in the same horizontal direction. Two transverse sliding skids and two longitudinal sliding seats are respectively arranged under the distribution beam at the positions corresponding to the two steel pipe columns, and the hinge supports connect the main beam and the top ends of the steel pipe columns. 6 . The beam lifting station suitable for changing the web of steel box girder according to claim 2 , wherein the lower end of the movable outrigger is slidably supported on the pushing steel box girder through a sliding rail, and the sliding rail It is detachably connected with the steel box beam, and the sliding track is an assembled structure. 7. The beam lifting station suitable for the change of the web of the steel box girder according to claim 1, wherein the lifting mechanism moves longitudinally along the main beam through a longitudinal positioning system, and the longitudinal positioning system comprises a longitudinal movement rail , a position adjustment base, a connecting beam, a position adjustment reaction force seat and a position adjustment oil cylinder, the longitudinal movement rails are longitudinally laid on the main beam, and the position adjustment bases are a pair and are slidably arranged on the longitudinal movement rails at intervals On the upper side, a pair of position adjustment bases are connected by connecting beams, the position adjustment reaction force seat is fixed on the main beam, the position adjustment oil cylinder block is fixed on the position adjustment reaction force seat, and the position adjustment oil cylinder is telescopic The rod is connected to the position-adjusting base, and the lifting mechanism is fixed on the position-adjusting base. 8. The beam-lifting station suitable for changing the web of a steel box girder according to claim 1, wherein the spreader comprises a connecting anchor head, a matching beam, and an ear plate, and the connecting anchor head is connected with the lifting mechanism, The middle part of the matching beam and the connecting anchor head are connected by pins, the ear plates are arranged in three groups and are arranged on the matching beam at intervals, and each group of ear plates and the steel box beam are connected by connecting pins. 9. The beam lifting station suitable for the change of the steel box girder web according to claim 1, wherein the fixed legs are anchored on the temporary pier through a temporary bearing and a finishing threaded steel, and the temporary bearing is It is supported between the distribution beam and the upper surface of the temporary pier, and the finishing threaded steel is screwed to connect the distribution beam and the temporary pier. 10. Beam-lifting station jacking process suitable for steel box girder web changes, characterized in that it comprises the following steps: Step 1: The side push of the movable outrigger is completed, and the locking of the fixed outrigger is released, that is, the temporary support and the finishing rebar are removed. The outriggers on both sides are stressed; Step 2: The main beams, movable outriggers and fixed outriggers on the lateral sides of the beam-lifting station are moved laterally respectively. After the lateral movement meets the requirements of the steel box girder web, install temporary locking, fix each leg, and then install the connection beam connection Fixed outriggers or movable outriggers on both lateral sides; Step 3: Convert the movable outrigger and the fixed outrigger hinge support under the main beam of the beam-lifting station to prepare for reversing, install the assembly platform on the movable outrigger side to the fixed outrigger side, and prepare for pushing; Step 4: After the jacking preparation is completed, pass the pair of longitudinal beams of the jacking guide beam through the space inside the pair of fixed legs respectively, and then install the cross beam between the pair of main beams; Step 5: Lay the sliding track on the longitudinal beam of the guide beam, the longitudinal sliding seat on the fixed outrigger is matched with the sliding track, remove the lower structure of the fixed outrigger, and install the steel box girder normally and push it forward.

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