WO2023168902A1 - Machine d'érection de poutre principale de pont à double mode et procédé d'érection de poutre à portée variable - Google Patents

Machine d'érection de poutre principale de pont à double mode et procédé d'érection de poutre à portée variable Download PDF

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Publication number
WO2023168902A1
WO2023168902A1 PCT/CN2022/111493 CN2022111493W WO2023168902A1 WO 2023168902 A1 WO2023168902 A1 WO 2023168902A1 CN 2022111493 W CN2022111493 W CN 2022111493W WO 2023168902 A1 WO2023168902 A1 WO 2023168902A1
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WIPO (PCT)
Prior art keywords
assembly
machine arm
leg
machine
arm
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PCT/CN2022/111493
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English (en)
Chinese (zh)
Inventor
徐超
谢继伟
李珍西
李兴运
曹雄鹰
朱兵
孙凯
王俊杰
张颖晖
Original Assignee
中铁工程机械研究设计院有限公司
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Publication of WO2023168902A1 publication Critical patent/WO2023168902A1/fr

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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
    • E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
    • 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

Definitions

  • the present invention relates to the technical field of bridge construction, and specifically to a dual-mode bridge erecting machine and a variable-span girder erecting method.
  • the bridge erecting machine can continuously erect different types of bridges such as straight lines, diagonal lines, and curves. It can realize the full set of box girders to be dropped into place at one time. It can also meet the efficient erection of box girders with different spans on the same line and two lines with different spans.
  • the problem solved by the invention is: how to improve the span-changing operation efficiency of the bridge erecting machine.
  • the present invention provides a dual-mode bridge erecting machine, including:
  • a lifting assembly which is hung on the machine arm and is suitable for moving along the length direction of the machine arm;
  • a front auxiliary leg assembly which is detachably connected to the machine arm and is adapted to move along the length direction of the machine arm;
  • a front leg assembly which is connected to the lower end of the machine arm and is adapted to self-propelled along the length direction of the machine arm;
  • a middle support leg assembly is connected to the upper end of the machine arm and is adapted to move along the length direction of the machine arm driven by the lifting assembly to change the position of the middle support leg assembly. Describe the support position on the machine arm;
  • the front auxiliary leg assembly includes a front auxiliary leg, a first running mechanism and a longitudinal movement mechanism
  • the machine arm penetrates the front auxiliary leg and is detachably connected to the front auxiliary leg
  • the first running mechanism is arranged on the front auxiliary leg and is suitable for running on the upper end surface of the machine arm.
  • One end of the longitudinal movement mechanism is connected to the machine arm, and the other end is connected to the front auxiliary leg.
  • the legs are connected, and the longitudinal movement mechanism is used to drive the front auxiliary leg to move between the first support position and the second support position.
  • the front leg assembly includes a hanging wheel assembly, a supporting wheel assembly and a front leg that are connected in sequence from top to bottom
  • the machine arm includes a machine arm body and is provided on both sides of the bottom of the machine arm body
  • the lower ear beam the hanging wheel assembly is hung on the lower ear beam and is rollingly connected to the lower ear beam
  • the supporting wheel assembly is drivingly connected to the bottom of the machine arm body
  • the supporting wheel The assembly is used to drive the front leg assembly to self-propelled along the length direction of the machine arm.
  • the supporting wheel assembly includes a supporting wheel bracket connected to the front leg, a gear motor provided on the supporting wheel bracket, and a supporting wheel provided on the gear motor.
  • the hanging wheel assembly It includes a hanging wheel and a hanging wheel bracket.
  • the arm also includes a rack structure provided at the bottom of the arm body and arranged along the length direction of the arm body.
  • the gear motor is connected to the rack structure.
  • the supporting wheel is rollingly connected to the bottom of the machine arm body, the hanging wheel is suitable for running on the lower ear beam, the upper end and the lower end of the hanging wheel bracket are respectively connected with the hanging wheel and the Wheel bracket connection.
  • the front leg assembly further includes an anchor rod, one end of the anchor rod is connected to the front leg, and the other end is suitable for anchoring with the box girder when the front leg is supported on the bridge pier.
  • the middle support leg assembly includes a middle support leg and a suspension assembly.
  • the middle support leg encloses a channel structure for the passage of the lifting assembly and the box beam to be racked.
  • the suspension assembly It includes a hanging bracket and an oil cylinder latch assembly arranged on the hanging bracket. One end of the hanging bracket is hingedly connected to the middle leg, and the other end is rollingly connected to the upper end of the machine arm, and the hanging bracket The bracket is adapted to be connected or separated from the lifting assembly through the oil cylinder latch assembly.
  • the middle support leg includes a third upper beam, a third lower beam, an inner cylinder, an outer cylinder, a first cylinder latch assembly, a second cylinder latch assembly, a conversion sleeve and a third lifting cylinder.
  • the hanging bracket is hingedly connected to the third upper beam, the two ends of the third upper beam are connected to the inner column respectively, and the two ends of the third lower beam are connected to the outer column respectively, so
  • the outer cylinder is sleeved on the inner cylinder
  • the conversion sleeve is sleeved on the inner cylinder, and is connected to the inner cylinder through the first cylinder latch assembly.
  • the outer cylinder It is connected to the inner cylinder through the second cylinder latch assembly.
  • Both ends of the third lifting cylinder are connected to the conversion sleeve and the outer cylinder respectively, and are suitable for driving the inner cylinder.
  • the column expands and contracts relative to the outer column.
  • the rear outrigger assembly includes a rear outrigger, a folding mechanism and a second running mechanism.
  • One end of the rear outrigger is hinged to the tail end of the machine arm, and the other end is connected to the second running mechanism.
  • the second traveling mechanism is used to drive the rear outriggers to travel
  • the two ends of the folding mechanism are respectively connected to the rear outriggers and the machine arm, and are suitable for driving the rear outriggers to turn upward. fold.
  • the rear leg includes a fourth upper beam
  • the fourth upper beam includes an upper beam body and an L-shaped beam
  • the horizontal section of the L-shaped beam is connected to the upper beam body
  • the folding mechanism One end is hinged to the machine arm, and the other end is hinged to the vertical section of the L-shaped beam.
  • the present invention also provides a variable-span girder erecting method, which adopts the above-mentioned dual-mode bridge erecting machine, including a first girder erecting mode and a second girder erecting mode;
  • the first beam erection mode includes:
  • Step A The front outrigger assembly and the rear outrigger assembly of the dual-mode bridge erecting machine are supported, and the middle outrigger assembly of the dual-mode bridge erecting machine is locked on the first predetermined position corresponding to the 40m span on the machine arm.
  • the support position is retracted and vacated to complete the preparation for the crossing hole;
  • the front outrigger assembly and the rear outrigger assembly synchronously drive the machine arm to move longitudinally into place at one time, and after the middle outrigger assembly is in place Supported on the bridge deck, the front auxiliary leg assembly of the dual-mode bridge erecting machine moves to the bridge pier and is supported, and the lifting assembly of the dual-mode bridge erecting machine moves to the rear outrigger assembly. nearby;
  • the front leg assembly and the rear leg assembly support, and the lifting assembly drives the middle leg assembly to move from the first predetermined support position to a designated position.
  • the assembly is locked with the machine arm and retracts to fly into the air, completing the preparation for the crossing hole;
  • the front outrigger assembly and the rear outrigger assembly synchronously drive the machine arm to move longitudinally into place at one time, and the front auxiliary
  • the outrigger assembly and the middle outrigger assembly are supported in place, and the lifting assembly moves to the vicinity of the rear outrigger assembly;
  • Step B The front outrigger assembly contracts and rises into the air, and moves to the front pier for support;
  • Step C The lifting assembly moves to the vicinity of the front outrigger assembly, the rear outrigger assembly is folded upward into position, the change is completed across the through hole, and the beam is waiting for erection;
  • the second beam erection mode includes:
  • Step a Remove the front auxiliary leg assembly from the machine arm, which is supported by the front leg assembly and the rear leg assembly, and the lifting assembly drives the middle leg assembly. It travels to the second predetermined support position corresponding to the span of 32m. After the middle leg assembly is in place, it is locked with the machine arm and retracts to fly into the air, completing the preparation for changing the span through the hole;
  • Step b The front outrigger assembly and the rear outrigger assembly synchronously drive the machine arm to move longitudinally into position at one time. After the middle outrigger assembly is in place, it is supported on the bridge deck, and the lifting The assembly moves to the vicinity of the rear outrigger assembly;
  • Step c The front outrigger assembly contracts and rises into the air, and moves to the front pier for support;
  • step d the lifting assembly moves to the vicinity of the front outrigger assembly, the rear outrigger assembly is folded upward and in place, completing the cross-over hole, and waiting for the beam to be erected.
  • the dual-mode bridge erecting machine of the present invention can adopt different girder erecting modes according to the span change of the box girder to be erected in the erection line.
  • the span of the box girder to be erected in the erection line is between 20m and 40m
  • the front auxiliary outrigger assembly can be moved forward or backward to the corresponding pier for support to realize the erection of box girders with different spans, or the middle outrigger assembly can be driven to the designated position through the lifting assembly. (that is, the support position corresponding to the span of the box girder to be erected) to achieve the erection of box girder with different spans.
  • the third beam erecting mode can also adopt the second beam erecting mode described later, that is, by removing the front auxiliary outrigger assembly and driving the middle outrigger assembly from the first predetermined support corresponding to the 40m span through the lifting assembly. The position is walked to the second predetermined support position corresponding to the 32m span, and then the front leg assembly is moved forward to the corresponding pier for support to realize the erection of box girders with different spans and the bridge erection machine through holes and other working conditions.
  • the girder erection process It is simple and does not require structural disassembly and assembly of the arm of the dual-mode bridge erecting machine, which effectively improves the efficiency of the span-changing operation of the dual-mode bridge erecting machine.
  • both the front outrigger assembly and the rear outrigger assembly can be self-propelled, so that when the dual-mode bridge erecting machine is moving longitudinally through the hole, the front outrigger assembly and the rear outrigger assembly can simultaneously drive the entire machine for one-time longitudinal movement. By moving the through hole, there is no need to convert the support of each leg assembly, which improves the through hole efficiency of the entire machine.
  • Figure 1 is a schematic structural diagram of a dual-mode bridge erecting machine in an embodiment of the present invention
  • Figure 2 is a schematic structural diagram of the front auxiliary leg assembly in the embodiment of the present invention.
  • Figure 3 is a left structural schematic diagram of the front auxiliary leg assembly in the embodiment of the present invention.
  • Figure 4 is a schematic structural diagram of the front outrigger assembly in the embodiment of the present invention.
  • Figure 5 is a left structural schematic diagram of the front outrigger assembly in the embodiment of the present invention.
  • Figure 6 is a schematic structural diagram of the middle leg assembly in the embodiment of the present invention.
  • Figure 7 is a left structural schematic diagram of the middle leg assembly in the embodiment of the present invention.
  • Figure 8 is a schematic structural diagram of the rear outrigger assembly in the embodiment of the present invention.
  • Figure 9 is a left structural schematic diagram of the rear outrigger assembly in the embodiment of the present invention.
  • Figure 10 is a schematic structural diagram corresponding to completion of via hole preparation in step A1 of the variable span beam erecting method in the embodiment of the present invention.
  • Figure 11 is a schematic structural diagram corresponding to when the machine arm is longitudinally moved into position in step A1 of the variable span girder erecting method in the embodiment of the present invention
  • Figure 12 is a schematic structural diagram corresponding to step B1 in the variable span beam erecting method in the embodiment of the present invention.
  • Figure 13 is a schematic structural diagram corresponding to step C1 in the variable span beam erecting method in the embodiment of the present invention.
  • Figure 14 is a schematic structural diagram corresponding to completion of via hole preparation in step A2 of the variable span beam erecting method in the embodiment of the present invention.
  • Figure 15 is a schematic structural diagram corresponding to when the machine arm is longitudinally moved into position in step A2 of the variable span girder erecting method in the embodiment of the present invention
  • Figure 16 is a schematic structural diagram corresponding to step B2 in the variable span beam erecting method in the embodiment of the present invention.
  • Figure 17 is a schematic structural diagram corresponding to step C2 in the variable span beam erecting method in the embodiment of the present invention.
  • Figure 18 is a schematic structural diagram corresponding to step a in the variable span beam erecting method in the embodiment of the present invention.
  • Figure 19 is a schematic structural diagram corresponding to step b in the variable span beam erecting method in the embodiment of the present invention.
  • Figure 20 is a schematic structural diagram corresponding to step c in the variable span girder bridge erecting method in the embodiment of the present invention.
  • Figure 21 is a schematic structural diagram corresponding to step d in the variable span beam erecting method in the embodiment of the present invention.
  • Machine arm 11. Machine arm body; 12. Upper ear beam; 13. Lower ear beam; 14. Rack structure;
  • Front auxiliary outrigger assembly 31. Front auxiliary outrigger; 311. First upper beam; 312. First column; 3121. Screw top; 313. First climbing cylinder; 314. First jacking cylinder; 315. Machine arm latch assembly; 32. First traveling mechanism; 33. Longitudinal shift mechanism;
  • FIG. 40 Front outrigger assembly; 41. Front outrigger; 411. Second upper beam; 412. Second column; 413. Second climbing cylinder; 414. Second jacking cylinder; 415. Cross beam latch assembly; 42 , supporting wheel assembly; 421. supporting wheel bracket; 422. gear motor; 423. supporting wheel; 43. hanging wheel assembly; 431. hanging wheel bracket; 432. hanging wheel; 44. anchor rod;
  • Middle support leg assembly 50.
  • Middle support leg assembly 51.
  • Middle support leg 511.
  • Third lower beam 513.
  • First column latch assembly; 516 the second cylinder latch assembly; 517, conversion sleeve; 518, third lifting cylinder; 52, hanging assembly; 521, hanging bracket; 522, roller;
  • Rear outrigger assembly 61. Rear outrigger; 611. Fourth upper beam; 6111. Upper beam body; 6112. L-shaped beam; 612. Fourth lower beam; 613. Fourth column; 614.
  • the Z-axis in the attached figure represents the vertical direction, that is, the up and down position, and the positive direction of the Z-axis (that is, the arrow of the Z-axis points) represents the upward direction, and the reverse direction of the Z-axis represents the downward direction;
  • the X-axis in the attached figure represents the horizontal direction. , and designated as the left and right positions, and the positive direction of the X-axis represents the left side, and the reverse direction of the The reverse direction represents the rear side; at the same time, it should be noted that the aforementioned Z-axis, Y-axis, and Orientation, construction and operation in a specific orientation and therefore should not be construed as limiting the invention.
  • an embodiment of the present invention provides a dual-mode bridge erecting machine, which includes: a machine arm 10; and a lifting assembly 20, which is hung on the machine arm 10 and is suitable for use along the length direction of the machine arm 10.
  • the front auxiliary leg assembly 30 is detachably connected to the machine arm 10 and is suitable for moving along the length direction of the machine arm 10
  • the front auxiliary leg assembly 40 is connected to the lower end of the machine arm 10 and is suitable for movement. It travels along the length direction of the machine arm 10
  • the middle leg assembly 50 is connected to the upper end of the machine arm 10 and is adapted to move along the length direction of the machine arm 10 driven by the lifting assembly 20 to change the center leg assembly 50.
  • the shaft is folded.
  • the length direction of the machine arm 10 refers to the Y-axis direction in FIG. 1
  • the width direction of the machine arm 10 refers to the X-axis direction in FIG. 2 .
  • the front auxiliary leg assembly 30, the front leg assembly 40, the middle leg assembly 50 and the rear leg assembly 60 are arranged on the machine arm 10 in sequence from front to back; and the front auxiliary leg assembly 30 can move longitudinally along the length direction of the machine arm 10 (that is, move along the Y-axis direction in the figure).
  • the front auxiliary leg assembly 30 moves longitudinally with the arm 10 and reaches the position, if the span of the hole is larger than the span of the last completed erection.
  • the span of the box girder for example, changes from 32m to 40m.
  • the pier is located in front of the front auxiliary leg assembly 30.
  • the front auxiliary leg assembly 30 can move forward to the position corresponding to the pier, and Locked with the machine arm 10, if the span of the hole is smaller than the span of the box girder that was erected last time, for example, the span is changed from 40m to 32m, at this time the bridge pier is located behind the front auxiliary outrigger assembly 30, and the front auxiliary outrigger assembly 30 can be moved to the position corresponding to the bridge pier by retreating and locked with the machine arm 10 .
  • the front outrigger assembly 40 can self-propelled along the machine arm 10. When the front outrigger assembly 40 and the machine arm 10 are locked, the front outrigger assembly 40 can drive the machine arm 10 to move longitudinally through the hole.
  • the middle outrigger assembly 50 can move longitudinally on the machine arm 10, and the rear outrigger assembly 60 can perform folding movements, and can travel by itself when supported on the bridge deck.
  • the rear leg assembly 60 can also drive the machine arm 10 to move longitudinally through the hole.
  • the self-propelled operation of the front outrigger assembly 40 or the rear outrigger assembly 60 means that the outrigger assembly is equipped with a driving mechanism (i.e., the traveling mechanism below). Under the driving action of the driving mechanism, the front outriggers The assembly 40 or the rear outrigger assembly 60 can walk along the machine arm 10 or the bridge deck on its own.
  • the front auxiliary support can be used to The leg assembly 30 moves forward or backward to the corresponding pier for support to realize the erection of box girders with different spans.
  • the lifting assembly 20 can be used to drive the middle outrigger assembly 50 to a designated position, and the middle outrigger can be The assembly 50 is locked with the machine arm 10, and then the front leg assembly 40 and the rear leg assembly 60 drive the machine arm 10 to longitudinally move through the hole into place at one time.
  • the front auxiliary leg assembly 30 also comes with the arm 10
  • the longitudinal movement is in place, and finally the front leg assembly 40 is moved forward to the corresponding bridge pier for support to realize the erection of box girders with different spans and the bridge erecting machine's through holes and other working conditions.
  • the aforementioned variable-span girder erecting process is the first girder erecting mode of the dual-mode bridge erecting machine.
  • the installation of the front auxiliary outrigger assembly 30 can be canceled when assembling the bridge erecting machine, that is, the front auxiliary outrigger assembly 30 can be removed from the machine arm 10 , and then drive the middle outrigger assembly 50 through the lifting assembly 20 to move from the first predetermined support position corresponding to the 40m span to the second predetermined support position corresponding to the 32m span, and make the middle outrigger assembly 50 and the machine arm 10 is locked, and then the front leg assembly 40 and the rear leg assembly 60 drive the machine arm 10 to longitudinally move through the hole into place at one time, and finally the front leg assembly 40 moves forward to the corresponding pier for support to achieve different spans Box girder erection and bridge erection machine drilling etc.
  • the first girder erecting mode of the dual-mode bridge erecting machine can also be used to erect the erection line with the span of the
  • the dual-mode bridge erecting machine in this embodiment can adopt different girder erecting modes according to the span change of the box girder to be erected in the erection line.
  • the span of the box girder to be erected in the erection line changes between 20m and 40m
  • the front auxiliary leg assembly 30 is moved forward or backward to the corresponding pier for support, the erection of box girders with different spans can be realized, or the middle leg assembly 50 can be driven by the lifting assembly 20 to move to a designated position. (that is, the support position corresponding to the span of the box girder to be erected) to achieve the erection of box girder with different spans.
  • the first beam erecting mode can also adopt the second beam erecting mode described later, that is, by removing the front auxiliary leg assembly 30 and driving the middle outrigger assembly 50 from the 40m span corresponding to the third beam erecting mode through the lifting assembly 20.
  • the first predetermined support position travels to the second predetermined support position corresponding to the span of 32m, and then the front leg assembly 40 moves forward to the corresponding pier for support to realize the erection of box girders with different spans and the bridge erection machine through-hole and other working conditions.
  • both the front outrigger assembly 40 and the rear outrigger assembly 60 can be self-propelled, so that when the dual-mode bridge erecting machine moves longitudinally through the hole, the front outrigger assembly 40 and the rear outrigger assembly 60 can simultaneously drive the entire bridge erecting machine.
  • the machine moves longitudinally through the hole at one time, without the need for conversion support of each leg assembly, which improves the hole through hole efficiency of the entire machine.
  • the dual-mode bridge erecting machine also includes a power chamber 70.
  • the power chamber 70 is placed at the tail of the machine arm 10 and is connected to the machine arm 10 through four pins.
  • a power device and a control device are placed in the power room 70. Provide power for the construction of dual-mode bridge erecting machines.
  • the machine arm 10 adopts a single box girder structure, which can be a whole box girder structure or a multi-segment box girder assembly structure.
  • the machine arm 10 adopts a multi-segment single box girder structure, and adjacent segments are connected by high-strength bolts. This not only facilitates transportation, but also effectively shortens the longitudinal distance of the entire machine, thereby It can better adapt to various narrow erection conditions and meet the needs of single and double line erection.
  • two track plates are respectively provided on the upper and lower end faces of the machine arm 10.
  • the track plate on the upper end face is symmetrically arranged with the track plate on the lower end face, and on the same end face, the two track plates are also symmetrically arranged. Therefore, by providing a track plate on the machine arm 10, the machine arm 10 forms a guide rail in the up and down direction, so that the machine arm 10 can be cooperatively connected with each leg assembly and the lifting assembly 20, so that the machine arm 10 can be lifted up and down. Slide on the machine arm 10.
  • the lifting assembly 20 includes a front lifting trolley 21 and a rear lifting trolley 22.
  • the front lifting trolley 21 and the rear lifting trolley 22 are movably arranged on the machine arm 10, and the front lifting trolley 21 or the rear lifting trolley 22
  • the lifting trolley 22 is adapted to be connected with the middle leg assembly 50 to drive the middle leg assembly 50 to move on the machine arm 10 .
  • the front auxiliary leg assembly 30 includes a front auxiliary leg 31 , a first running mechanism 32 and a longitudinal movement mechanism 33 .
  • the machine arm 10 penetrates the front auxiliary leg 31 and is connected with the front The auxiliary leg 31 is detachably connected.
  • the first running mechanism 32 is arranged on the front auxiliary leg 31 and is suitable for running on the upper end surface of the machine arm 10.
  • One end of the longitudinal movement mechanism 33 is connected to the machine arm 10, and the other end is connected to the front
  • the auxiliary legs 31 are connected, and the longitudinal movement mechanism 33 is used to drive the front auxiliary legs 31 to move between the first support position and the second support position.
  • the machine arm 10 passes through the front auxiliary leg 31 and is detachably connected to the front auxiliary leg 31 through a latch or the like.
  • the first traveling mechanism 32 is usually a running wheel
  • the longitudinal movement mechanism 33 is usually a longitudinal oil cylinder.
  • the longitudinal oil cylinder drives the traveling wheels to travel along the upper end surface of the machine arm 10 through telescopic motion.
  • the front auxiliary leg 31 is sleeved on the machine arm 10, so that the connection between the front auxiliary leg 31 and the machine arm 10 is more stable. ; Moreover, by arranging the longitudinal shift mechanism 33, one end of the longitudinal shift mechanism 33 is connected to the machine arm 10, and the other end is connected to the front auxiliary leg 31, so that the front auxiliary leg 31 can be driven by the longitudinal shift mechanism 33 in the first position. The movement between the support position and the second support position enables the front auxiliary leg assembly 30 to transition between the first support position and the second support position.
  • the front auxiliary leg 31 includes a first upper beam 311 , a first column 312 , a first climbing cylinder 313 , a first jacking cylinder 314 and an arm latch assembly 315 .
  • the first cylinder 312 has a door frame three-level telescopic structure.
  • the first running mechanism 32 is arranged on the first upper beam 311, and the first upper beam 311 and the first column 312 form a through cavity.
  • the machine arm 10 passes through the through cavity.
  • the top of the column 312 is detachably connected to the first upper beam 311 through a flange.
  • the bottom of the first column 312 is provided with a spiral top 3121 for supporting on the bridge pier or bridge deck, a first climbing cylinder 313 and a first jacking cylinder.
  • the oil cylinder 314 is provided on the first column 312 and is used to drive the first column 312 to telescope.
  • the arm latch assembly 315 is provided on the first column 312 and is suitable for connecting the front auxiliary leg 31 with the machine arm when extended. 10 is locked, and the front auxiliary leg 31 and the machine arm 10 are unlocked when retracted.
  • both ends of the longitudinal movement mechanism 33 are respectively connected to the first upper beam 311 and the machine arm 10 through pins.
  • the first running mechanism 32 of the running wheel is provided at both left and right ends of the first upper beam 311 and is located on the first the front and rear sides of the upper beam 311.
  • the first column 312 has a three-stage telescopic structure, including a first-stage column, a second-stage column and a third-stage column connected in sequence from top to bottom.
  • the two ends of the first climbing cylinder 313 are connected to the third-stage pole respectively.
  • the two different beams of the column are connected to realize the climbing of the column under no-load condition of the dual-mode bridge erecting machine.
  • the two ends of the first jacking cylinder 314 are respectively connected with the beam of the first-level column and the second-level column.
  • the cross beams are connected to realize the lifting and lowering of the entire first column 312 through telescopic movement.
  • the upper end of the first cylinder 312 is provided with a machine arm pin hole.
  • the first column 312 is configured as a door frame three-stage telescopic structure, and the first climbing cylinder 313 and the first jacking cylinder 314 jointly drive the first column 312 to telescope, so as to realize the front auxiliary support.
  • the telescopic function of the leg assembly 30 is simple in structure; at the same time, by setting the spiral top 3121 at the bottom of the first column 312, the lifting movement of the spiral top 3121 is used to eliminate the contact between the bottom of the front auxiliary leg 31 and the bridge pier or bridge deck. The small gap between them ensures that the front auxiliary legs 31 can be firmly supported on the bridge pier or the bridge deck.
  • the front leg assembly 40 includes a hanging wheel assembly 43 , a supporting wheel assembly 42 and a front leg 41 connected in sequence from top to bottom
  • the machine arm 10 includes the machine arm body 11 and lower ear beams 13 arranged on both sides of the bottom of the machine arm body 11.
  • the hanging wheel assembly 43 is hung on the lower ear beam 13 and is rollingly connected with the lower ear beam 13.
  • the supporting wheel assembly 42 is drivingly connected to the bottom of the machine arm body 11. And the supporting wheel assembly 42 is used to drive the front leg assembly 40 to move along the length direction of the machine arm 10 .
  • the arm 10 includes an arm body 11 , upper ear beams 12 disposed on both sides of the top of the arm body 11 , and lower ear beams 13 disposed on both sides of the bottom end of the arm body 11 .
  • the first column 312 passes through the machine.
  • the arm latch assembly 315 is connected or separated from the upper ear beam 12 , and the hanging wheel assembly 43 is hung on the lower ear beam 13 and is rollingly connected with the lower ear beam 13 .
  • the supporting wheel assembly 42 serves as a driving unit and is drivingly connected to the bottom of the machine arm body 11, and the front leg 41 and the hanging wheel assembly 43 are both connected to the supporting wheel assembly 42; when the front leg assembly 40 is in the air, Under the driving action of the supporting wheel assembly 42, the supporting wheel assembly 42 drives the front outrigger assembly 41 and the hanging wheel assembly 43 to self-propelled along the machine arm 10, thus realizing the front outrigger assembly 40 to self-propelled along the machine arm 10; the front outrigger assembly 40 When the assembly 40 is supported on the bridge deck or pier, under the driving action of the supporting wheel assembly 42, the front leg assembly 40 can drive the machine arm 10 to move longitudinally through the hole.
  • the supporting wheel assembly 42 includes a supporting wheel bracket 421 connected to the front leg 41, a gear motor 422 provided on the supporting wheel bracket 421, and a supporting wheel 423 provided on the gear motor 422,
  • the hanging wheel assembly 43 includes a hanging wheel bracket 431 and a hanging wheel 432.
  • the arm 10 also includes a rack structure 14 provided at the bottom of the arm body 11 and arranged along the length direction of the arm body 11. The gear motor 422 and the rack structure 14 is engaged, the supporting wheel 423 is rollingly connected to the bottom of the machine arm body 11, the hanging wheel 432 is suitable for running on the lower ear beam 13, and the upper and lower ends of the hanging wheel bracket 431 are connected with the hanging wheel 432 and the supporting wheel bracket 421 respectively.
  • the upper end of the hanging wheel bracket 431 is connected to the hanging wheel 432, the lower end of the hanging wheel bracket 431 is detachably connected to the supporting wheel bracket 421 through fasteners such as bolts, and the hanging wheel 432 is buckled on the lower ear beam 13, so that the lower end of the hanging wheel bracket 431 is detachably connected to the supporting wheel bracket 421.
  • the ear beam 13 serves as a track for the hanging wheel 432 to roll.
  • the rack structure 14 is located in the middle of the bottom of the arm body 11, and supporting wheels 423 are provided on the left and right sides of the rack structure 14.
  • the rack structure 14 extends from the front end to the rear end of the bottom of the arm body 11, so that The front leg assembly 40 can self-propelled between the front end and the rear end of the machine arm 10 .
  • the gear motor 422 refers to a motor whose output shaft is a gear shaft. The gear shaft of the gear motor 422 meshes with the rack structure 14 at the bottom of the arm body 11 .
  • the gear motor 422 serves as the driving unit of the front leg assembly 40 and meshes with the rack structure 14 at the bottom of the arm body 11.
  • the gear motor 422 rotates, the meshing effect between the gear shaft and the rack structure 14 down, causing a relative displacement between the front leg assembly 40 and the machine arm 10, so as to realize the self-propelled movement of the front leg assembly 40 along the machine arm 10, or the front leg assembly 40 drives the machine arm 10 to move longitudinally hole.
  • the supporting wheel 423 is rollingly connected to the bottom of the machine arm body 11 so that the supporting wheel assembly 42 rolls on the bottom of the machine arm body 11 when walking along the machine arm 10 , thereby reducing frictional resistance and ensuring that the front leg assembly 40 Smooth running also ensures smoothness when the front leg assembly 40 drives the machine arm 10 to move longitudinally through the hole.
  • the front leg 41 includes a second upper beam 411 , a second column 412 , a second climbing cylinder 413 , a second jacking cylinder 414 and a crossbeam latch assembly 415 .
  • the supporting wheel bracket 421 is connected to the second upper beam 411.
  • the second column 412 has a door frame three-stage telescopic structure.
  • the second climbing cylinder 413 and the second jacking cylinder 414 are arranged on the second column 412 and are used to drive the second column 412.
  • the beam latch assembly 415 is provided on the second column 412, and is adapted to lock the second column 412 with the second upper beam 411 when extended, and to lock the second column 412 with the second upper beam 411 when contracted. 411 unlocked.
  • the second column 412 has a door frame three-stage telescopic structure, and the two ends of the second climbing cylinder 413 are respectively connected to two different cross beams of the second column 412 to realize the dual-mode bridge erecting machine under no-load condition.
  • the two ends of the second lifting cylinder 414 are connected to the cross beam of the second column 412 and the second upper beam 411 respectively, and the entire second column 412 is raised and lowered through telescopic motion.
  • the front support legs are realized by arranging the second column 412 as a door frame three-stage telescopic structure, and driving the second column 412 to telescope through the second climbing cylinder 413 and the second jacking cylinder 414.
  • the telescopic function of the assembly 40 is simple in structure.
  • the front leg 41 also includes a first traverse oil cylinder, and the second upper beam 411 is provided with a groove (not shown in the figure) for accommodating the first traverse oil cylinder.
  • the two ends of the first traverse oil cylinder are respectively connected with
  • the second upper crossbeam 411 is connected to the supporting wheel bracket 421, and the first traverse cylinder is adapted to drive the supporting wheel bracket 421 to move along the width direction of the machine arm 10 on the upper end surface of the second upper crossbeam 411.
  • the upper end of the second upper beam 411 is provided with a groove, and the first traverse oil cylinder is arranged in the groove; the lower end of the second upper beam 411 is connected or separated from the second column 412 through the beam latch assembly 415. .
  • the upper end of the second upper beam 411 is provided with a sliding surface. When the dual-mode bridge erecting machine is under heavy load (that is, when lifting the box girder), the sliding surface abuts the bottom of the supporting wheel bracket 421.
  • the first traversing oil cylinder drives the supporting wheel assembly 42 to slide along the width direction of the machine arm 10 on the sliding surface of the second upper beam 411, so that the front leg 41 is transverse relative to the supporting wheel assembly 42.
  • the dual-mode bridge erecting machine erects box girders on a curved route, it is convenient for the front supporting legs 41 to adjust their support positions on the bridge piers by moving left and right.
  • the upper end of the second upper beam 411 is provided with hanging ear structures on both front and rear sides
  • the supporting wheel bracket 421 of the supporting wheel assembly 42 is provided with a reverse buckle structure.
  • the reverse buckle structure is buckled on the hanging ear structure and connected with the hanging ears. Structural sliding connections. In this way, when the front leg 41 moves laterally relative to the supporting wheel assembly 42, the front supporting leg 41 is always hung on the supporting wheel bracket 421, ensuring the reliability of the sliding connection between the front supporting leg 41 and the supporting wheel assembly 42.
  • the front leg assembly 40 also includes an anchor rod 44 , one end of the anchor rod 44 is connected to the front leg 41 , and the other end is suitable for the front leg 41 to be supported on the pier. When anchored to the box beam.
  • the anchor rod 44 is first fixed to the box girder, and then the subsequent via hole process is performed.
  • one end of the anchor rod 44 is fixed on the front leg 41 through a pin, and the other end is anchored to the lifting hole on the box beam when the front leg 41 is supported on the pier. To improve the safety and efficiency of the whole machine when drilling holes.
  • the middle leg assembly 5 includes a middle leg 51 and a hanging assembly 52 .
  • the middle leg 51 encloses a passage for the lifting assembly 20 and the box beam to be racked to pass.
  • the hanging assembly 52 includes a hanging bracket 521 and an oil cylinder latch assembly arranged on the hanging bracket 521.
  • One end of the hanging bracket 521 is hinged with the middle leg 51, and the other end is rollingly connected with the upper end of the machine arm 10, and
  • the hanging bracket 521 is connected or separated from the lifting assembly 20 through the oil cylinder latch assembly.
  • the front lifting trolley 21 and the rear lifting trolley 22 are both hung at the lower end of the machine arm 10 , and the machine arm 10 is hung at the lower end of the hanging assembly 52 . Therefore, it is possible to avoid the front lifting trolley 21 and the rear lifting trolley 22 from interfering with the middle leg assembly 50 when sliding on the machine arm 10 .
  • the cylinder latch assembly on the suspension assembly 52 is aligned with the latch support on the front lifting trolley 21 or the rear lifting trolley 22.
  • the latch assembly works to extend into the latch support.
  • the front lifting trolley 21 or the rear lifting trolley 22 continues to move along the machine arm 10, it will drive the middle leg assembly 50 to move along the machine arm 10, thereby changing the center The position of the outrigger assembly 50 on the machine arm 10.
  • the lower end of the hanging bracket 521 has an open structure, and there are reverse buckle ear beams on both sides.
  • the hanging bracket 521 is connected to the upper ear beam 12 of the machine arm 10 through the reverse buckle ear beams.
  • the middle part of the hanging bracket 521 The upper and lower structures are connected through a circular barrel structure.
  • the lower end of the hanging bracket 521 is also provided with running wheels.
  • the running wheels enable the middle leg 51 to roll on the upper surface track of the machine arm 10.
  • the hanging bracket 521 is also provided with There are guide wheels that roll along the sides of the upper ear beam 12 of the machine arm 10 in the width direction.
  • the middle leg 51 includes a third upper beam 511 , a third lower beam 512 , an inner column 513 , an outer column 514 , a first column latch assembly 515 , a second The cylinder latch assembly 516, the conversion sleeve 517 and the third lifting cylinder 518.
  • the hanging bracket 521 is hinged with the third upper beam 511. Both ends of the third upper beam 511 are connected to the inner column 513 respectively.
  • the third lower beam 512 Both ends are connected to the outer cylinder 514 respectively.
  • the outer cylinder 514 is set on the inner cylinder 513.
  • the conversion sleeve 517 is set on the inner cylinder 513 and is connected to the inner cylinder 513 through the first cylinder latch assembly 515.
  • the outer cylinder 514 and the inner cylinder 513 are connected through the second cylinder latch assembly 516.
  • Both ends of the third lifting cylinder 518 are connected to the conversion sleeve 517 and the outer cylinder 514 respectively, and are suitable for driving the inner cylinder.
  • the body 513 expands and contracts relative to the outer cylinder 514 .
  • the third lower crossbeam 512 has a box-shaped structure and is provided with a cushioning box component at its bottom.
  • the third lower crossbeam 512 is supported on the bridge deck through the cushioning box component to prevent the bottom of the middle leg 51 from directly contacting the bridge.
  • the bridge deck is worn when it comes into contact.
  • the lower ends of the two outer cylinders 514 are respectively connected to both ends of the third lower beam 512 through flanges, and the outer cylinder 514 has a door-shaped structure, the inner cylinder 513 has a " ⁇ "-shaped structure, and both sides of the outer cylinder 514
  • the cylinder is a hollow structure for the inner cylinder 513 to expand and contract inside.
  • the outer cylinder 514 is provided with a pin hole, and the outer cylinder 514 is connected to the inner cylinder 513 through the second cylinder latch assembly 516. .
  • the third lifting cylinder 518 is arranged between the cylinders on both sides of the outer cylinder 514. One end of the third lifting cylinder 518 is hinged with the lower end of the outer cylinder 514, and the other end is hinged with the conversion sleeve 517.
  • the conversion sleeve 517 is set on On the inner cylinder 513, and connected with the inner cylinder 513 through the first cylinder latch assembly 515.
  • the telescopic movement of the third lifting cylinder 518 can cause the conversion sleeve 517 to slide along the inner cylinder 513 to realize the climbing of the conversion sleeve 517.
  • the telescopic movement of the third lifting cylinder 518 can cause the inner cylinder 513 to slide within the outer cylinder 514, thereby realizing the lifting and lowering of the inner cylinder 513.
  • the middle leg assembly 50 can be raised and lowered.
  • the middle support leg 51 also includes a second traversing cylinder
  • the third upper crossbeam 511 includes a crossbeam body, a supporting longitudinal beam, and a load-sharing beam.
  • the two ends of the second traverse cylinder are connected to the crossbeam body and the load-sharing beam respectively.
  • the upper end of the load-sharing beam is hinged with the suspension assembly 52 through a ball joint structure, the lower end of the load-sharing beam is in contact with the upper end of the support longitudinal beam, and the second traverse cylinder is suitable for driving the load-sharing beam relative to the support longitudinal beam.
  • the beam body moves laterally.
  • the cross-beam body is two rows of variable-section cross-beams.
  • the ends and middle parts of the two rows of variable-section cross-beams are connected by supporting longitudinal beams.
  • the load-sharing beam is located above the supporting longitudinal beams and is in contact with the upper end surface of the supporting longitudinal beams.
  • the second traversing oil cylinder is arranged between two rows of variable cross-section beams, and one end of the second traversing oil cylinder is connected to the end of one of the variable cross-section beams, and the other end is connected to the load-sharing beam.
  • the second traverse cylinder is used to realize the traverse movement of the load-sharing beam relative to the beam body, so that when the dual-mode bridge erecting machine erects the box girder on the curved route, the middle leg 51 can adjust its position on the bridge deck by transversely moving left and right. support position.
  • the load-sharing beam is a two-half variable-section box structure.
  • the two half-variable-section box structures are connected by bolts.
  • the upper end of the hinge seat and the hanging bracket 521 is provided with a ball hinge, and a ball hinge is formed between the load-sharing beam and the hanging bracket 521 through the ball hinge seat and the ball hinge.
  • the rear leg assembly 60 includes a rear leg 61 , a folding mechanism 62 and a second running mechanism 63 .
  • One end of the rear leg 61 is hinged with the tail end of the machine arm 10 .
  • the other end is connected to the second running mechanism 63, which is used to drive the rear outrigger 61 to travel.
  • the two ends of the folding mechanism 62 are connected to the rear outrigger 61 and the machine arm 10 respectively, and are suitable for driving the rear outrigger 61. Fold upward.
  • the second running mechanism 63 includes two sets of running wheels, each set of running wheels has two tires, the upper end of the rear leg 61 is hinged with the tail end of the machine arm 10, and the lower end of the rear leg 61 is connected to the second running wheel.
  • the second running mechanism 63 is connected, and the second running mechanism 63 can drive the rear legs 61 to run on the bridge deck by themselves.
  • the folding mechanism 62 is usually a folding oil cylinder, and the two ends of the folding oil cylinder are connected to the rear leg 61 and the machine arm 10 respectively. In this way, the rear leg assembly 60 is folded through the expansion and contraction of the folding cylinder.
  • the rear leg 61 includes a fourth upper beam 611 .
  • the fourth upper beam 611 includes an upper beam body 6111 and an L-shaped beam 6112 .
  • the horizontal section of the L-shaped beam 6112 is connected to the upper beam 6112 .
  • the main body 6111 is connected, one end of the folding mechanism 62 is hinged with the machine arm 10 , and the other end is hinged with the vertical section of the L-shaped beam 6112 .
  • an L-shaped beam 6112 is provided on the upper beam body 6111, and the horizontal section of the L-shaped beam 6112 is connected to the upper beam body 6111, and the vertical section of the L-shaped beam 6112 is hinged with the folding mechanism 62.
  • the folding mechanism 62 performs telescopic movement, it can drive the L-shaped beam 6112 to rotate around the hinge axis, thereby driving the rear leg assembly 60 to fold.
  • the structure is simple and the folding efficiency is high.
  • the front end of the upper beam body 6111 is provided with a hinge support.
  • the fourth upper beam 611 and the machine arm 10 are hinged at the hinge support. In this way, the rear outrigger assembly 60 supports the connection with the machine arm 10 during walking.
  • the rear outrigger also includes a fourth lower beam 612 , a fourth column 613 and a fourth lifting cylinder 614 .
  • the upper beam body 6111 of the fourth upper beam 611 is hingedly connected to the tail of the machine arm 10 , the upper beam body 6111 and the fourth lower beam 612 are respectively connected to both ends of the fourth column 613, the second running mechanism 63 is connected to the fourth lower beam 612, and the two ends of the fourth lifting cylinder 614 are respectively connected to the upper beam body 6111 is connected to the fourth column 613.
  • both ends of the fourth lower beam 612 are connected to the running wheels of the second running mechanism 63 through pins, and the middle position of the fourth lower beam 612 is connected to the fourth column 613 through pins.
  • the fourth column 613 is the main telescopic mechanism of the rear leg 61.
  • One end of the fourth lifting cylinder 614 is connected to the cross beam of the fourth column 613, and the other end is connected to the fourth upper cross beam 611 through flange bolts. In this way, through The telescopic movement of the fourth lifting cylinder 614 can realize the lifting and lowering of the rear outrigger assembly 60 .
  • the box girder erection equipment when it is in use, it is usually combined with a beam transport vehicle to form a transport device.
  • the beam transport vehicle can be a single beam transport vehicle, and the position of the box girder is realized through two piggyback trucks.
  • the adjustment is convenient for the front lifting trolley 21 and the rear lifting trolley 22 to lift the box girder; it can also be a split-type beam transporting truck.
  • one of the front beam transporting vehicle and the rear beam transporting vehicle has its own powered wheel set and can walk independently; at the same time, the front beam transporting vehicle and the rear beam transporting vehicle are each equipped with a pack transport trolley.
  • the position of the box girder can be adjusted to facilitate the lifting of the box girder by the front lifting trolley 21 and the rear lifting trolley 22 .
  • the beam transport vehicle runs below the box girder erection equipment.
  • the beam transport vehicle can transport the beams forward synchronously through the front lifting trolley 21 and the pack beam trolley set on the beam transport vehicle, so that the box girder is moved forward.
  • the position of the lifting point is closer to the middle leg assembly 50.
  • a split-type beam transporting truck is used. After the front beam transporting truck and the rear beam transporting truck are brought together, the rear outrigger assembly 60 steps on the beam transporting truck, and the rear lifting trolley 22 takes out the beam, thereby completing the erection of the box girder.
  • Another embodiment of the present invention provides a variable-span girder erecting method, using the above-mentioned dual-mode bridge erecting machine, including a first girder erecting mode and a second girder erecting mode.
  • the dual-mode bridge erecting machine adopts the first girder erecting mode to perform variable-span girder erection operations.
  • the machine adopts the first girder erecting mode or the second girder erecting mode to perform variable-span girder erection operations;
  • the first beam mode includes:
  • Step A1 the front leg assembly 40 and the rear leg assembly 60 of the dual-mode bridge erecting machine are supported, and the middle leg assembly 50 of the dual-mode bridge erecting machine is locked on the first predetermined position corresponding to the 40m span on the arm 10
  • the support position is retracted and vacated to complete the preparation for the variable span hole.
  • the front outrigger assembly 40 and the rear outrigger assembly 60 synchronously drive the machine arm 10 to move longitudinally in place at one time, and the middle outrigger assembly 50 is supported on the bridge deck after being in place.
  • the front auxiliary leg assembly 30 of the dual-mode bridge erecting machine moves to the bridge pier and is supported, and the lifting assembly 20 of the dual-mode bridge erecting machine moves to the vicinity of the rear outrigger assembly 60;
  • Step B1 The front outrigger assembly 40 retracts and rises into the air, and walks to the front pier for support;
  • Step C1 The lifting assembly 20 moves to the vicinity of the front outrigger assembly 40, and the rear outrigger assembly 60 is folded upwards into place, completing the cross-over hole, and waiting for the beam to be erected;
  • the first beaming mode includes;
  • Step A2 The front outrigger assembly 40 and the rear outrigger assembly 60 are supported.
  • the lifting assembly 20 drives the middle outrigger assembly 50 to move from the first predetermined support position to the designated position.
  • the middle outrigger assembly 50 is connected to the machine.
  • the arm 10 is locked and retracted to fly into the air, completing the preparation for the cross-hole.
  • the front outrigger assembly 40 and the rear outrigger assembly 60 synchronously drive the machine arm 10 to move longitudinally in place at one time.
  • the front auxiliary outrigger assembly 30 and the middle outrigger assembly The rear support 50 is in place, and the lifting assembly 20 moves to the vicinity of the rear outrigger assembly 60;
  • Step B2 The front outrigger assembly 40 retracts and rises into the air, and walks to the front pier for support;
  • Step C2 The lifting assembly 20 moves to the vicinity of the front outrigger assembly 40, and the rear outrigger assembly 60 is folded upwards into place, completing the transition through the hole, and waiting for the beam to be erected.
  • the second girder mode includes:
  • Step a Remove the front auxiliary outrigger assembly 30 from the machine arm 10. Support the front outrigger assembly 40 and the rear outrigger assembly 60.
  • the lifting assembly 20 drives the middle outrigger assembly 50 to move to the 32m span.
  • the middle leg assembly 50 is locked with the machine arm 10 and retracted to fly into the air, completing preparations for changing across the hole;
  • Step b The front outrigger assembly 40 and the rear outrigger assembly 60 synchronously drive the machine arm 10 to move longitudinally in place at one time. After the middle outrigger assembly 50 is in place, it is supported on the bridge deck, and the lifting assembly 20 moves to the rear. Outrigger assembly around 60;
  • Step c The front outrigger assembly 40 retracts and rises into the air, and walks to the front pier for support;
  • Step d The lifting assembly 20 moves to the vicinity of the front outrigger assembly 40, and the rear outrigger assembly 60 is folded upwards into place, completing the change across the through hole, and waiting for the beam to be erected.
  • steps A1 to C1 are a case of the first girder erecting mode of the dual-mode bridge erecting machine.
  • the girder erecting process is shown in Figures 10 to 13.
  • Steps A2 to C2 are the conditions of the dual-mode bridge erecting machine.
  • the girder erection process is shown in Figure 14 to Figure 17.
  • Steps a to d are the second girder erecting mode of the dual-mode bridge erecting machine.
  • the specific girder erecting process is shown in Figures 18 to Figures. twenty one.
  • the beam erection process is: the beam transport vehicle feeds the beam to the position, and the front lifting trolley 21 takes the beam; the rear lifting trolley 22 moves to the beam removal position, the rear outrigger assembly 60 is supported on the beam transport vehicle, and the rear lifting trolley 21 22 takes out the beam; the front lifting trolley 21 and the rear lifting trolley 22 drop the beam synchronously, the rear outrigger assembly 60 contracts and folds upward, the beam transporting truck exits the dual-mode bridge erecting machine, and the beam erection is completed.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

La présente invention concerne une machine d'érection de poutre principale de pont à double mode et un procédé d'érection de poutre principale à portée variable. La machine d'érection de poutre principale de pont à double mode comprend : un bras de machine ; un ensemble de levage suspendu sur le bras de machine et approprié pour se déplacer dans le sens de la longueur du bras de machine ; un ensemble pied support auxiliaire avant relié de manière amovible au bras de machine et approprié pour se déplacer dans le sens de la longueur du bras de machine ; un ensemble pied support avant relié à l'extrémité inférieure du bras de machine et approprié pour une marche automatique dans le sens de la longueur du bras de machine ; un ensemble pied support intermédiaire relié à l'extrémité supérieure du bras de machine et approprié pour se déplacer dans le sens de la longueur du bras de machine sous le mécanisme d'entraînement de l'ensemble de levage, pour changer la position de support de l'ensemble pied support intermédiaire sur le bras de machine ; et un ensemble pied support arrière relié de manière articulée à l'extrémité arrière du bras de machine et approprié pour une marche automatique le long du tablier de pont et se pliant autour d'une tige de charnière lorsqu'il est supporté sur le tablier de pont. De cette manière, il n'est pas nécessaire de démonter et d'assembler le bras de machine pendant l'érection de poutre principale à profilé à portée variable, le processus est simple, et l'efficacité de fonctionnement à portée variable est améliorée.
PCT/CN2022/111493 2022-03-07 2022-08-10 Machine d'érection de poutre principale de pont à double mode et procédé d'érection de poutre à portée variable WO2023168902A1 (fr)

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