CN114319145A - Bridge erecting method using bridge erecting machine - Google Patents
Bridge erecting method using bridge erecting machine Download PDFInfo
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- CN114319145A CN114319145A CN202111630210.5A CN202111630210A CN114319145A CN 114319145 A CN114319145 A CN 114319145A CN 202111630210 A CN202111630210 A CN 202111630210A CN 114319145 A CN114319145 A CN 114319145A
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- 238000009434 installation Methods 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 11
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- 230000032258 transport Effects 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 44
- 210000001364 upper extremity Anatomy 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 37
- 230000003014 reinforcing effect Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
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- 238000004873 anchoring Methods 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The application provides a bridge erecting method by using a bridge erecting machine, which comprises the following steps: (1) installing a bridge girder erection machine on the foundation beam; (2) the bridge girder erection machine passes through the hole and moves to a bridge position to be constructed, and the front end of the bridge girder erection machine is supported at a front span bridge pier; (3) the girder transporting flat car transports the girder segments to the tail part of the bridge girder erection machine, a hoisting crown block of the bridge girder erection machine is used for hoisting the girder segments to move forwards to the bridge site to be constructed, the aerial postures and the installation positions of the girder segments are adjusted, and the girder segments are lowered; (4) the bridge deck is conveyed to the tail part of the bridge girder erection machine by the girder transporting flat car, and the bridge deck is hoisted by a hoisting crown block of the bridge girder erection machine to be laid on the constructed steel girder segment; (5) and (5) repeating the steps (2) to (5) until the whole bridge is erected. The bridge erecting method solves the problem that the large-volume steel plate composite beam in the mountainous area cannot be erected, can realize sustainable construction of the steel beam sections and the bridge deck slab, and is high in construction efficiency.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to a bridge erecting method by using a bridge erecting machine.
Background
In the construction process of the traditional bridge, the traditional support is generally used for construction, and the construction is carried out in a cast-in-place construction mode, so that the construction period is long, the influence on traffic is large, the overall energy consumption is high, the manual workload on site is large, and the labor cost rises greatly; and the traditional bridge construction support supports cast-in-place potential safety hazard is large, and the influence on the environment and traffic of the city is large. Especially, in the construction in mountainous areas, the requirement on equipment is too high when large-scale equipment directly lifts the whole double-I-shaped steel concrete composite beam bridge under the influence of topographic conditions, and the equipment is difficult to reach a preset position. Meanwhile, the support method also faces extra-high supports and is restricted by large safety risk, so that the popularization of the double-I-steel plate concrete composite beam in the mountainous area is limited to a certain extent.
Disclosure of Invention
The application aims to provide a bridge erecting method using a bridge erecting machine, which solves the problem that a large-size steel plate composite beam in a mountainous area limited by terrain cannot be erected, reduces the use of large-scale equipment, fills the gap of erecting the whole I-shaped steel composite beam in the mountainous area, and has high construction efficiency.
In order to achieve the above object, the present application provides the following technical solutions:
a bridge erecting method by using a bridge erecting machine comprises the following steps:
(1) installing a bridge girder erection machine on the foundation beam;
(2) the bridge girder erection machine passes through the hole and moves to a bridge position to be constructed, and the front end of the bridge girder erection machine is supported at a front span bridge pier;
(3) the girder transporting flat car transports the girder segments to the tail part of the bridge girder erection machine, a hoisting crown block of the bridge girder erection machine is used for hoisting the girder segments to move forwards to the bridge site to be constructed, the aerial postures and the installation positions of the girder segments are adjusted, and the girder segments are lowered;
(4) the bridge deck is conveyed to the tail part of the bridge girder erection machine by the girder transporting flat car, and the bridge deck is hoisted by a hoisting crown block of the bridge girder erection machine to be laid on the constructed steel girder segment;
(5) and (5) repeating the steps (2) to (5) until the whole bridge is erected.
Further setting: the bridge erecting machine in the step (1) comprises the following steps:
a front bracket system, a middle support bracket system and a rear support bracket system of the bridge girder erection machine are sequentially arranged along the bridge direction;
main beams are arranged on the front support system, the middle support system and the rear support system;
a temporary bearing cross beam system is arranged between the middle support bracket system and the rear leg system of the main beam;
the main beam is provided with an overhead traveling crane moving beam extending along the transverse bridge direction, an overhead traveling crane traveling mechanism is arranged between the main beam and the overhead traveling crane moving beam, and the overhead traveling crane moving beam is provided with a hoisting overhead traveling crane;
a hydraulic system and an electrical system of the bridge erecting machine.
Further setting: the crane is characterized in that the main beam is provided with two crown block moving beams which are arranged side by side along the length direction of the main beam, and a hoisting crown block on the crown block moving beam can move along the length direction of the crown block moving beam.
Further setting: the hoisting crown blocks of the two crown block moving beams respectively hoist two ends of the steel beam segment, and the installation position of the steel beam segment is adjusted by changing the positions of the hoisting crown blocks on the crown block moving beams;
further setting: and respectively controlling the heights of the front support system and the rear support system according to the longitudinal slope designed by the bridge so as to adjust the aerial posture of the steel girder segment.
Further setting: the via hole of the bridge girder erection machine in the step (2) comprises the following steps:
the front support system and the rear support leg system lift the main beam upwards to separate the middle support system from the bridge floor;
the middle support bracket system moves to one end of the main beam close to the front support bracket system, and the front support bracket system and the rear support leg system retract to enable the middle support bracket system to be supported on the bridge floor;
the temporary support system moves to the middle of the main beam and is supported on the bridge floor;
retracting the front support system and the rear support leg system to separate from the bridge floor, and driving the main beam to move forwards to the bridge position to be constructed by utilizing a main beam longitudinal movement driving mechanism of the middle support system and a travelling mechanism of the temporary support system;
and (3) moving the front end of the main beam to the position of the pier of the composite beam to be constructed, stopping, lowering the front support system to support the pier, and lowering the rear support system to support the bridge deck to complete the via hole of the bridge girder erection machine.
Further setting: in the process that the main beam moves forwards, the crown block moving beam on the main beam drives the hoisting crown block to move backwards relative to the main beam, so that relative displacement does not exist between the crown block moving beam and the hoisting crown block and between the middle support bracket system and the temporary bracket system.
Further setting: a rotary disc is arranged between a front supporting leg and a front base of the front support system, a connecting disc is arranged between a main beam longitudinal moving mechanism and a bent beam of the middle support system, and the connecting disc and the bent beam can rotate relatively;
still including the step of adjustment bridging machine girder angle:
separating the rear supporting leg system and the temporary bearing beam system from the bridge floor;
unlocking a rotating disk of the front support system to enable the front support leg and the front base to rotate relatively;
the locking of a connecting disc of the middle support bracket system is released, so that the connecting disc and the bent beam can rotate relatively;
the transverse traveling mechanism of the middle support bracket system drives the bent beam to move along the length direction of the bent beam so as to enable the main beam to rotate around the front bracket system;
after the main beam rotates to a preset angle, the front support system and the middle support system are adjusted to be perpendicular to the main beam, the rotating disc and the connecting disc are locked, and the adjustment of the angle of the bridge girder erection machine is completed.
Further setting: and reducing the beam falling speed after the steel beam segment falls to a preset distance from the bottom of the main beam.
Further setting: before hoisting the next steel beam segment, the welding of the circular seam of the hoisted steel beam segment needs to be completed.
Compared with the prior art, the scheme of the application has the following advantages:
1. according to the bridge erecting method using the bridge erecting machine, the construction efficiency of erecting the steel plate combination beam can be effectively improved, the construction resource allocation can be reduced, and meanwhile, the construction cost is reduced under the condition that the construction safety, quality and progress are controllable. By the adoption of the bridge erecting method, additional supports, high-pier gantry and large-scale hoisting equipment are not needed, leveling and hardening are not needed along the bridge, the problem that the large-volume steel plate composite beam in the mountainous area limited by the terrain cannot be erected smoothly can be effectively solved, and construction efficiency is high.
2. According to the bridge erecting method using the bridge erecting machine, the bridge deck can be erected continuously after the steel beam sections are erected, the construction period is greatly shortened, the construction efficiency is improved, one set of bridge erecting machine can be used for erecting the steel beam sections and the bridge deck, and the use of large-scale equipment is reduced.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of one embodiment of a bridge girder erection machine according to the present application;
FIG. 2 is a schematic structural view of a front mounting system of the bridge girder erection machine of the present application;
FIG. 3 is a schematic illustration of the front mount system of the bridge girder erection machine and pier anchoring according to the present application;
FIG. 4 is a schematic view of a pier reinforcement structure of the present application;
FIG. 5 is a schematic structural diagram of a middle support bracket system of the bridge girder erection machine according to the present application;
FIG. 6 is an enlarged view of portion A of FIG. 5;
FIG. 7 is a schematic structural view of a rear leg system of the bridge girder erection machine of the present application;
FIG. 8 is a schematic structural view of a temporary cross beam support system of the bridge girder erection machine of the present application;
FIG. 9a is a schematic view of the bridge girder erection machine in the present application in an installed state;
FIG. 9b is a schematic view of a bridge girder erection machine via in the present application;
FIG. 9c is a schematic view of the bridge girder segment hoisted by the bridge girder erection machine according to the present application;
fig. 9d is a schematic view of the bridge girder erection machine constructed in the middle of a bridge in the present application.
In the figure, 1, a main beam; 2. a front mount system; 21. a main beam joist; 22. a hydraulic jack; 23. a small lifting frame; 24. a telescopic sleeve; 25. a front leg; 251. an upper support leg; 252. a lower leg; 26. a front base; 261. a supporting seat; 2611. a top plate; 2612. a base plate; 2613. a connecting portion; 2614. a stiffening rib; 262. a limiting plate; 2621. adding a rib plate; 27. an upper cross beam; 28. rotating the disc; 3. a mid-cradle support system; 31. a middle support leg joist; 32. a main beam longitudinal movement driving mechanism; 321. a driving wheel box; 322. a driven wheel box; 323. a coupling assembly; 324. a drive motor; 325. a deflecting hanging wheel; 33. a transverse traveling mechanism; 331. a transverse traveling wheel box; 332. a middle leg rail; 34. a connecting disc; 341. connecting pins; 4. a rear leg system; 41. a rear leg joist; 42. a rear leg; 43. a rear support leg hydraulic jack; 44. a small lifting frame; 45. a bearing platform; 46. a lower support; 5. a temporary load-bearing beam system; 51. an upper support beam; 52. a lower support beam; 53. a traveling mechanism; 54. supporting legs; 541. an upper support tube; 542. a lower support pillar; 55. supporting the jack; 6. hoisting the overhead traveling crane; 7. a crown block moving beam; 71. a crown block beam traveling mechanism; 1000. a bridge girder erection machine; 2000. a bridge pier; 2001. a first reinforcing bar; 2002. hooping; 2003. a second reinforcing bar; 2004. finish rolling the deformed steel bar; 3000. a steel beam segment; 4000. a bridge deck; 5000. and (5) carrying the beam flatcar.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Aiming at the problems that the construction difficulty is large and a large-volume steel plate composite beam cannot be erected smoothly due to the fact that the existing bridge girder erection machine is limited by the terrain, please refer to fig. 1 to 9d, the application provides a bridge girder erection machine 1000 and a bridge girder erection method using the bridge girder erection machine 1000, and the bridge girder erection machine does not need to put in supports, high pier gates and large hoisting equipment, does not need to level and harden the bridge along the line, is high in construction efficiency, and can effectively guarantee construction safety and quality.
The bridge erecting machine 1000 comprises a main beam 1, a front support system 2, a middle support system 3, a rear support system 4, a temporary bearing beam system 5, a hoisting crane 6, a hydraulic system and an electrical system, wherein the main beam 1 extends along the bridge direction, the two ends of the main beam 1 in the longitudinal direction are respectively set as a front end supporting point and a rear end supporting point, the front support system 2, the middle support system 3 and the rear support system 4 are respectively and correspondingly arranged at the front end supporting point, the middle position and the rear end supporting point of the main beam 1, the front support system 2 is used for adjusting the height of the front end supporting point of the main beam 1, the rear support system 4 is used for adjusting the height of the rear end supporting point of the main beam 1, the temporary bearing beam system 5 is arranged at one side of the main beam 1 close to the rear end supporting point and is arranged between the middle support system 3 and the rear support system 4, the hoisting crown block 6 is arranged on the main beam 1 and can move along the longitudinal direction of the main beam 1 so as to be used for hoisting the section bar for bridge construction.
The main beam 1 comprises two sets of truss structures arranged in parallel, the truss structures are connected in a connecting mode to form a whole, each set of truss structures are arranged in an A shape, each set of truss structures are arranged in a split mode, each truss structure is connected with the corresponding truss structure through a pin shaft, and each truss structure is connected with the corresponding truss structure through the corresponding truss structure. Preferably, each section of the truss structure of the embodiment is 12m long, and the truss structure of the embodiment adopts a section mode, so that the truss structure can be disassembled into a plurality of sections for transportation, the transportation is convenient, and the transportation cost is reduced.
In addition, in the present embodiment, the front end of the main beam 1 in the traveling direction is regarded as a front end supporting point, and the rear end thereof is regarded as a rear end supporting point of the main beam 1.
The front support system 2 is located at a front end supporting point of the main beam 1, and comprises a main beam joist 21, a hydraulic telescopic assembly, a front supporting leg 25 and a front base 26 which are sequentially arranged from top to bottom. The main beam joist 21 is arranged at the top of the main beam 1 in an extending manner along the transverse bridge direction and is simultaneously connected with two groups of truss structures of the main beam 1, and the hydraulic telescopic assembly is arranged between the main beam joist 21 and the front supporting leg 25 so as to adjust the distance between the main beam joist and the front supporting leg through the telescopic operation of the hydraulic telescopic assembly.
Specifically, the hydraulic telescopic assembly comprises a hydraulic jack 22, a small lifting frame 23 and a telescopic sleeve 24, the tail end of a cylinder barrel of the hydraulic jack 22 is fixed with the main beam supporting beam 21, and the extending end of a piston rod of the hydraulic jack 22 is hinged with the small lifting frame 23. The telescopic tube 24 comprises an outer tube and an inner tube which are sleeved with each other, the top end of the outer tube is fixed with the main beam joist 21, the bottom end of the inner tube is connected with the bottom end of the front supporting leg 25, and meanwhile, the small lifting frame 23 is fixed with the inner tube. The hydraulic jack 22 pushes the small lifting frame 23 and simultaneously drives the telescopic tube 24 to extend and retract, and the telescopic tube 24 plays a role in guiding and limiting the movement of the front support leg 25 and the main beam 1.
Preferably, the hydraulic telescopic assemblies, the front support legs 25 and the front base 26 in this embodiment are provided in two groups corresponding to the two groups of truss structures, the telescopic pipes 24 of each group of hydraulic telescopic assemblies are respectively provided at two sides of the truss structures, and two sides of the small lifting frame 23 are fixedly connected with the inner pipes of the telescopic pipes 24 at two sides of the truss structures. In addition, the two sets of hydraulic telescopic assemblies and the front support legs 25 are connected through an upper cross beam 27, the bottom ends of the inner pipes of the telescopic pipes 24 of the two sets of hydraulic telescopic assemblies are regulated by the upper cross beam 27, and the top ends of the two sets of front support legs 25 are fixed to the upper cross beam 27, so that the telescopic synchronism of the two sets of front support legs 25 is ensured.
The front supporting leg 25 comprises an upper supporting leg 251 and a lower supporting leg 252 which are sleeved with each other, the top end of the upper supporting leg 251 is fixed with the upper cross beam 27, the bottom end of the lower supporting leg 252 is fixed with the front base 26, and a plurality of mounting holes which are arranged along the height direction are formed in the upper supporting leg 251 and the lower supporting leg 252, so that pin shafts can be arranged in the mounting holes of the upper supporting leg 251 and the lower supporting leg 252 in a penetrating mode to fix the upper supporting leg 251 and the lower supporting leg 252.
The front base 26 is arranged at the bottom of the lower supporting leg 252, the front base 26 comprises a supporting seat 261 and a limiting plate 262, the supporting seat 261 is connected with a pier stud embedded part to realize the connection and fixation of the front supporting leg 25 and the pier stud, and the limiting plate 262 is arranged at the bottom of the supporting seat 261 to play a role in positioning. Specifically, the bottom of the lower leg 252 is welded to one side of the support seat 261, and the stopper plate 262 is vertically welded to the bottom of the side of the support seat 261 welded to the lower leg 252. Simultaneously, supporting seat 261 is kept away from supporting seat 261 with lower landing leg 252 welded one side extends, and the supporting seat 261 of this application has inwards prolonged length for conventional support, be convenient for pier stud built-in fitting with supporting seat 261 connects fixedly, can improve the atress condition of preceding landing leg 25 system effectively, improves the stability that preceding landing leg 25 system and pier stud are connected ensures then the stability of this application frame bridge crane 1000 working process.
The supporting seat 261 comprises a top plate 2611 and a bottom plate 2612 which are arranged in parallel up and down, and a connecting part 2613 arranged between the top plate 2611 and the bottom plate 2612, wherein the connecting part 2613 comprises a plurality of I-shaped steels, two ends of the I-shaped steels are respectively welded with the top plate 2611 and the bottom plate 2612, and the I-shaped steels extend along the bridge direction. Meanwhile, stiffening ribs 2614 are respectively arranged on two sides of the i-steel, the stiffening ribs 2614 are connected with the i-steel and a top plate 2611 and/or a bottom plate 2612 on the end side of the i-steel, and the stiffening ribs 2614 are arranged in a plurality at preset intervals along the length direction of the i-steel so as to achieve the effect of enhancing the structural stability of the supporting seat 261. Preferably, in this embodiment, the top plate 2611 of the supporting seat 261 is a 40mm thick steel plate, the bottom plate 2612 is a 20mm thick steel plate, the i-steel is a 36B i-steel, and both the top plate 2611 and the bottom plate 2612 are welded to the flange of the i-steel.
The limiting plate 262 is arranged on the bottom plate 2612 of the supporting seat 261 to position the connecting position of the front supporting leg 25 and the pier stud, and a reinforced plate 2621 is arranged between the limiting plate 262 and the bottom plate 2612 to improve the connecting strength between the limiting plate 262 and the supporting seat 261.
A rotating disk 28 is further arranged between the front leg 25 and the front base 26, so that the front leg 25 and the front base 26 can rotate relatively, and the subsequent angle adjustment of the main beam 1 can be realized. In addition, the rotary disk 28 may be locked by a threaded fastener.
The utility model provides a bridge crane 1000 realizes through the anterior mounting system 2 of its front end the fixed connection of girder 1 and pier stud, just the hydraulic jack 22's that adopts among the anterior mounting system 2 structure can make bridge crane 1000 when going up and down the slope bridge, landing leg 25's height before convenient the adjustment need not the conversion, can be adapted to not the pier stud connection of co-altitude, has improved the stability and the security of landing leg 25 before bridge crane 1000 greatly.
The middle support bracket system 3 is installed in the middle of the bridge erecting machine 1000, and includes a middle support leg joist 31, a main beam longitudinal movement driving mechanism 32 and a transverse traveling mechanism 33, the main beam longitudinal movement driving mechanism 32 is installed at the bottom of the main beam 1 for driving the main beam 1 to move along the longitudinal bridge direction, the main beam longitudinal movement driving mechanism 32 and the transverse traveling mechanism 33 are respectively installed at the upper and lower sides of the middle support leg joist 31, the transverse traveling mechanism 33 is hinged at the bottom of the middle support leg joist 31, the transverse traveling mechanism 33 moves along the transverse bridge direction, and the purpose of adjusting the inclination of the middle support leg joist 31 can be achieved by adjusting the transverse traveling distance of the transverse traveling mechanism 33, so as to satisfy the requirement that different skew bridges rotate corresponding angles, and satisfy the requirement of using an oblique bridge.
In this embodiment, the middle support joist 31 is a curved joist, the main beam longitudinal movement driving mechanism 32 is provided with a group of middle support joist 31 at each of two ends thereof, so as to be respectively and correspondingly provided below the two groups of truss structures of the main beam 1, and meanwhile, the transverse traveling mechanism 33 is provided with a group of middle support joist 31 at each of two ends thereof, so that the angle of the middle support joist 31 can be adjusted by adjusting the positions of the two groups of transverse traveling mechanisms 33 relative to the middle support joist 31. In addition, the effect of adjusting the transverse position of the bridge girder erection machine 1000 can be achieved by adjusting the synchronous transverse movement of the transverse traveling mechanism 33.
Further, the top of the driving wheel box 321 and the top of the driven wheel box 322 are both provided with a deflection wheel 325 abutted to the top of the lower structural member of the girder 1 truss structure, and the driving wheel box 321 and the driven wheel box 322 are connected with the corresponding deflection wheels 325 through chains, so that an upper and a lower full driving wheels can be formed, smooth running of the through holes in the front and the rear of the girder 1 is ensured, and the phenomenon of track clamping in the running process is reduced. In addition, auxiliary side wheels can be additionally arranged on the front side and the rear side of the driving wheel box 321 and the driven wheel box 322 along the bridge direction, so that the problem that the main beam 1 is bitten and rubbed in the front and rear running process of the main beam 1 is solved.
The main beam 1 longitudinally moves the mechanism with set up connection pad 34 between the camber beam, connection pad 34 passes through connecting pin 341 and fixes on the camber beam, connection pad 34 with connect through the locating pin axle between the camber beam, when the non-locking state of locating pin axle, connection pad 34 can be relative the camber beam rotates. And, the flange blocks are symmetrically arranged on the connecting disc 34 along the radial direction, the connecting disc 34 is detachably connected with the main beam 1 longitudinal movement mechanism through the flange blocks, and the main beam 1 longitudinal movement mechanism and the corresponding truss structure can rotate relative to the bent beam through the connecting disc 34.
The utility model provides a well support braced system 3 passes through realize that bridge girder erection machine 1000's edge is in the same direction as the bridge and is removed to the via hole when girder 1 indulges the mechanism that moves goes on, all be provided with two walking wheel casees under two sets of truss structures of girder 1, realized the four-wheel drive of well landing leg for bridge girder erection machine 1000 is at the via hole in-process, girder 1's longitudinal movement is more steady, operates safe and reliable more.
In addition, a temporary bearing beam system 5 is arranged between the middle support bracket system 3 and the rear support leg system 4, the temporary bearing beam system 5 is movably assembled below the truss structure, and can be used for sharing the pressure around the rear support leg system 4 at the rear end of the main beam 1 of the bridge girder erection machine 1000 in the process of passing through and connecting the bridge girder, so that the steel girder panel is prevented from being damaged to play a role in protection. Interim bearing beam system 5 includes supporting beam 51 and lower supporting beam 52, it locates to go up supporting beam 51 the bottom of 1 crossbeam framework of girder, go up supporting beam 51 with be equipped with running gear 53 between the truss structure, running gear 53 includes supporting wheel and travel drive motor, the supporting wheel with locate the track roll-in cooperation of 1 truss mechanism bottom of girder, travel drive motor with the supporting wheel is connected and is used for driving its rotation. Go up telescopic supporting leg 54 that is equipped with the symmetry interval setting between supporting beam 51 and the lower supporting beam 52, the upper and lower both ends of supporting leg 54 are fixed with last supporting beam 51 and lower supporting beam 52 respectively, supporting leg 54 is including last supporting tube 541 and the lower support column 542 that cup joints each other, go up all to correspond on supporting tube 541 and the lower support column 542 and seted up a plurality of mounting holes, the accessible round pin axle passes go up the mounting hole of supporting tube 541 and lower support column 542 and realize fixing between them. A vertically arranged supporting jack 55 is further arranged between the upper supporting beam 51 and the lower supporting beam 52, and the distance between the upper supporting beam 51 and the lower supporting beam 52 is adjusted through the supporting jack 55.
In addition, the top of girder 1 is equipped with and erects at two sets along the cross bridge to extending the overhead traveling crane walking beam 7 at truss structure top, the both ends of overhead traveling crane walking beam 7 are equipped with overhead traveling crane beam running gear 71, overhead traveling crane walking beam 7 passes through the movably assembly of overhead traveling crane beam running gear 71 is in the top of truss mechanism, through overhead traveling crane beam running gear 71 realizes overhead traveling crane walking beam 7 is followed the lengthwise direction of girder 1 removes. A hoisting crown block 6 is arranged on the crown block moving beam 7, and a hoist is arranged on the hoisting crown block 6 to hoist the steel beam section 3000 and the bridge deck 4000, so that the longitudinal movement and the installation of the steel beam section 3000 and the bridge deck 4000 are completed. The movable pulley block is arranged below the winch and can save labor for the hoisting operation of the winch.
The bridge girder erection machine 1000 of this application is through optimizing self structure, with the altitude control of bridge girder erection machine 1000 in reasonable within range to girder 1 that adopts two truss structures can increase the width of bridge girder erection machine 1000, be convenient for hoist and mount girder segment 3000 and decking 4000, and can adjust girder segment 3000 and decking 4000's mounted position, make the girder steel of the big volume need not large-scale equipment and can accomplish the erection in the mountain area.
Therefore, in combination with the above, the present application also relates to a bridge erecting method using the bridge erecting machine 1000 described above, please refer to fig. 9a to 9d, which specifically includes the following steps:
(1) the bridge girder 1000 is installed on the foundation girder or the constructed bridge section.
As is known, the bridge girder erection machine 1000 is composed of a main girder 1, a front support system 2, a middle support system 3, a rear leg system 4, a temporary bearing cross beam system 5, a hoisting crown block 6, a hydraulic system, an electrical system and the like, so that the bridge girder erection machine 1000 can be transported to a construction site by an automobile for loading and unloading and installation by using the cooperation of a truck crane.
The bridge girder erection machine 1000 is characterized in that a front support system 2, a middle support system 3 and a rear leg system 4 are sequentially arranged along a foundation beam or a bridge section which is constructed, then a main girder 1 is installed on the front support system 2, the middle support system 3 and the rear leg system 4, and meanwhile a temporary bearing beam system 5 is installed between the middle support system 3 and the rear leg system 4 of the main girder 1. Next, an overhead traveling beam 7 extending along the cross bridge is installed on the main beam 1, an overhead traveling mechanism 71 is installed between the overhead traveling beam 7 and the main beam 1 to drive the overhead traveling beam 7 to move along the longitudinal direction of the main beam 1, the overhead traveling beam 7 is further provided with a hoisting overhead traveling crane 6, and the hoisting overhead traveling crane 6 can move along the longitudinal direction of the overhead traveling beam 7. And finally, installing a hydraulic system and an electric system of the bridge girder erection machine 1000.
Preferably, two crown block moving beams 7 arranged side by side along the longitudinal direction of the main beam 1 in this embodiment are arranged on the main beam 1, and the hoisting crown blocks 6 on the two crown block moving beams 7 can respectively hoist the two ends of the steel beam segment 3000, so as to improve the hoisting stability.
(2) The bridge girder erection machine 1000 is moved to the bridge site to be constructed through the hole, and the front end thereof is supported at the front span pier 2000.
When the bridge girder erection machine 1000 passes through a hole, the main girder 1 is lifted upwards through the front support system 2 and the rear support system 4, the middle support system 3 is separated from the bridge floor, then the middle support system 3 moves to one end of the main girder 1 close to the front support system 2, and the front support system 2 and the rear support system 4 retract to enable the middle support system 3 to be supported on the bridge floor. At the same time, the temporary load-bearing cross beam system 5 is moved to the middle of the main beam 1 and supported on the deck. And then retracting the front support system 2 and the rear support leg system 4 to separate the front support system and the rear support leg system from the bridge floor, and pushing the main beam 1 to move forwards to the bridge position to be constructed by using the main beam 1 longitudinal movement mechanism of the middle support system 3 and the walking mechanism 53 of the temporary bearing cross beam system 5. In the process that the main beam 1 moves forwards, the crown block moving beam 7 on the main beam 1 drives the hoisting crown block 6 to move backwards relative to the main beam 1, so that no relative displacement exists between the crown block moving beam 7 and the hoisting crown block 6 and between the middle support bracket system 3 and the temporary bracket system.
When the front end of the main beam 1 moves to the pier 2000 position of the composite beam to be constructed, the longitudinal moving mechanism and the traveling mechanism 53 of the main beam 1 can be stopped, then the front support system 2 extends to support the front support leg 25 at the pier 2000 position, and meanwhile, the front base 26 is anchored with the finish-rolled deformed steel bar 2004 pre-embedded at the pier top of the pier 2000, so that the front support system 2 is fixedly connected with the pier 2000.
Further, pier 2000 department of this application sets up pier reinforced structure, pier top reinforced structure include with the first reinforcing bar 2001 of the upper longitudinal reinforcement connection of pier top tie beam, longitudinal reinforcement integrated into one piece in first reinforcing bar 2001 and the pier top tie beam. The first reinforcing steel bar 2001 extends to the outside of the pier 2000 and is bent downwards for the first time, secondary bending is performed after the first reinforcing steel bar 2001 is bent downwards to a preset height, the first reinforcing steel bar 2001 after secondary bending obliquely extends into the pier, and the preset height of the primary bending point and the preset height of the secondary bending point of the first reinforcing steel bar 2001 are equal to the thickness of a pier cap, so that a closed structure is formed between the first reinforcing steel bar 2001 and the pier. The primary bending part of the first steel bar 2001 is further provided with a stirrup 2002 connected with a pier 2000, the stirrup 2002 forms an enlarged part on the pier top, the area of the enlarged part is larger than that of the pier top, and primary bending points of the first steel bar 2001 are uniformly distributed along the inner periphery of the stirrup 2002. Specifically, the maximum length of the enlarged portion from the center of the pier column along the length direction of the first steel bar 2001 is the sum of the radius length of the pier column and a first preset length, and the first preset length is preferably 110 mm; the maximum length of the enlarged portion from the center of the pier column along the direction perpendicular to the length direction of the first steel bar 2001 is the sum of the radius of the pier column and a second preset length, the second preset length is preferably 100mm, and the enlarged portion takes the center of the pier column as the center and extends along the directions of two sides perpendicular to the length direction of the first steel bar 2001. The length of the enlarged portion of the present application along the length direction of the first steel bar 2001 is the radius length of the pier column plus 110mm, and the length of the enlarged portion along the length direction perpendicular to the first steel bar 2001 is the radius length of the pier column plus 200 mm. The enlarged portion is further provided with a second reinforcing bar 2003 perpendicular to the first reinforcing bar 2001, a plurality of the second reinforcing bars 2003 are arranged side by side along a length direction of the first direction, and the plurality of the second reinforcing bars 2003 are uniformly arranged in the stirrup 2002.
This application is through setting up pier reinforced structure in mound top department, utilize first reinforcing bar 2001 and stirrup 2002 of being connected with mound top tie beam to form the enlargement portion at the mound top, and first reinforcing bar 2001 extends to pier 2000 outside and the downward buckling extends, can effectively improve the anti splitting ability at pier 2000 edge, and the enlargement portion can replace the area that supplementary mound comes bigger mound top, broken need set up supplementary mound and erect bridge crane 1000 under the not enough condition of mound top width, make the form that the girder steel erect great economy high-efficient, the adaptability can be strengthened.
In addition, it should be noted that the front bracket system 2 requires the finish-rolled deformed steel bar 2004 to be ejected out of the pier to measure the placement position and to be embedded with the anchorage in advance and a widening support means for the pier stud before erection. In addition, in the pier 2000 embedded with the finish-rolled deformed steel bar 2004, the front base 26 and the lower leg 252 of the front bracket system 2 need to be released in advance before the bridge girder erection machine 1000 passes through the hole to be anchored with the pier top, and the lower leg 252 needs to be connected with the upper leg 251 after the hole passes through the hole.
In another embodiment, the main beam 1 is divided into a front section and a rear section for installation, wherein the front half section of the main beam 1 is provided with the front support system 2, and the rear support system 4 is installed at the rear half section of the main beam 1, so that when the bridge crane 1000 is installed, the middle support system 3 and the temporary cross beam support system can be firstly arranged, the middle support system 3 is arranged at the end part of the foundation beam or the bridge where construction is completed, then the front half section of the main beam 1 on which the front support system 2 is installed is erected on the middle support system 3 and the temporary cross beam support system, and the front half section of the main beam 1 is driven to move forwards to the pier 2000 of the bridge station to be constructed by using the main beam 1 longitudinal moving mechanism of the middle support system 3 and the driving mechanism of the temporary cross beam support system, so that the front support system 2 and the pier 2000 are anchored. And then, the rear half section of the main beam 1 is installed, and the front half section and the rear half section of the main beam 1 are connected and fixed through pin shafts.
(3) The girder steel segment 3000 is transported to the tail of the bridge girder erection machine 1000 by using the girder transporting flatcar 5000, the girder steel segment 3000 is hoisted by a bridge crane crown block of the bridge girder erection machine 1000 to move forward to a bridge site to be constructed, the aerial posture and the installation position of the girder steel segment 3000 are adjusted, and the girder steel segment 3000 is lowered.
Specifically, the aerial attitude of the steel beam section 3000 can be adjusted by respectively controlling the heights of the front support system 2 and the rear leg system 4 according to the longitudinal slope of the bridge design; meanwhile, the two ends of the steel beam segment 3000 are respectively hoisted by the hoisting crown blocks 6 of the two crown block transfer beams 7, so that the installation position of the steel beam segment 3000 can be adjusted by changing the transverse positions of the hoisting crown blocks 6 on the crown block transfer beams 7.
In other embodiments, the steel beam section 3000 is divided into multiple sections along the transverse bridge direction, and the steel beam section 3000 can be installed on the same transverse bridge direction by adjusting the position of the cross beam of the hoisting crane 6 on the crane moving beam 7.
In addition, the speed of falling the roof beam needs to be reduced when girder steel segment 3000 falls to the distance of presetting in 1 bottom of girder, avoids the too fast construction error that easily causes, has great potential safety hazard.
When girder segment 3000 is transferred to the construction bridge site, it is necessary to weld the circular seam of this girder segment 3000 and the installed girder segment, thereby ensuring the construction safety of the subsequent via hole erection of bridge girder erection machine 1000.
(4) The transportation-amount flatcar transports the bridge deck 4000 to the tail of the bridge girder erection machine 1000, and hoists the bridge deck 4000 using the hoisting crown block 6 of the bridge girder erection machine 1000 to be laid on the constructed steel girder segment 3000.
The hoisting crown block 6 of the bridge girder erection machine 1000 hoists the bridge deck 4000 on the girder transport flat car 5000 to slowly move to the construction bridge site, the hoisting crown block 6 is provided with a rotating mechanism so as to rotate a hoisting tool through the rotating mechanism in the process of hoisting the bridge deck 4000 to adjust the aerial installation posture of the bridge deck 4000, then slowly fall and are installed in place, and then the steps are repeated until the erection of the bridge deck 4000 is completed.
In the installation process of the bridge deck 4000, because the number of the shear nails on the overhanging reinforcing steel bars, the shear groove reinforcing steel bars and the steel beams on the bridge deck 4000 is large, the position relation between the adjacent bridge deck 4000 needs to be noticed during installation, and mutual conflict is prevented. If the shear groove steel bars conflict with the shear nails, the position of the bridge deck 4000 needs to be adjusted to ensure the mounting and positioning accuracy of the bridge deck 4000.
(5) And (5) repeating the steps (2) to (4) until the whole bridge is erected.
In addition, the bridge girder erection machine 1000 of this application still can satisfy the construction demand of oblique crossing bridge through 1 angle of main girder of adjustment bridge girder erection machine 1000 to oblique crossing bridge, specifically includes following step:
firstly, the rear supporting leg system 4 and the temporary bearing cross beam system 5 are separated from the bridge floor, then the locking of the rotating disk 28 between the front supporting leg 25 and the front base 26 in the front support system 2 is released, the front supporting leg 25 and the front base 26 can rotate relatively, and simultaneously the locking of the connecting disk 34 which is connected with the pin shaft of the middle supporting leg joist 31 in the middle support system 3 is released, so that the connecting disk 34 can rotate relative to the middle supporting leg joist 31. Then, the transverse traveling wheel box in the middle support bracket system 3 is driven to travel along the middle support leg rail 332, so that the transverse traveling mechanism 33 of the middle support bracket system 3 is utilized to drive the middle support leg joist 31 to move along the length direction thereof, and at the moment, the main girder 1 rotates around the front bracket system 2, so as to realize the angle adjustment of the main girder 1 of the bridge girder erection machine 1000.
After the main beam 1 rotates to a preset angle, the central axes of the front support system 2 and the middle support system 3 are adjusted to be parallel to the axis of the main beam 1, and the rotating disc 28 and the connecting disc 34 are locked, so that the angle of the main beam 1 of the bridge girder erection machine 1000 can be adjusted, and the construction of the steel beam section 3000 of the skew bridge can be correspondingly performed.
According to the bridge construction method using the bridge girder erection machine 1000, the construction efficiency of erection of the steel plate combination girder can be effectively improved, the construction resource allocation can be reduced, and meanwhile, the construction cost is reduced under the condition that the construction safety, quality and progress are controllable. By adopting the bridge girder erection machine 1000 and the construction method of the bridge, no additional bracket, high pier gantry and large-scale hoisting equipment are required to be input, leveling and hardening are not required to be carried out along the bridge, the problem that the large-volume steel plate composite beam in the mountainous area limited by the terrain cannot be erected smoothly can be effectively solved, and the construction efficiency is high.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A bridge erecting method by using a bridge erecting machine is characterized by comprising the following steps:
(1) installing a bridge girder erection machine on the foundation beam;
(2) the bridge girder erection machine passes through the hole and moves to a bridge position to be constructed, and the front end of the bridge girder erection machine is supported at a front span bridge pier;
(3) the girder transporting flat car transports the girder segments to the tail part of the bridge girder erection machine, a hoisting crown block of the bridge girder erection machine is used for hoisting the girder segments to move forwards to the bridge site to be constructed, the aerial postures and the installation positions of the girder segments are adjusted, and the girder segments are lowered;
(4) the bridge deck is conveyed to the tail part of the bridge girder erection machine by the girder transporting flat car, and the bridge deck is hoisted by a hoisting crown block of the bridge girder erection machine to be laid on the constructed steel girder segment;
(5) and (5) repeating the steps (2) to (5) until the whole bridge is erected.
2. A bridge erecting method for a bridge girder erection machine according to claim 1, wherein the step (1) of mounting a bridge girder erection machine comprises the steps of:
a front bracket system, a middle support bracket system and a rear support bracket system of the bridge girder erection machine are sequentially arranged along the bridge direction;
main beams are arranged on the front support system, the middle support system and the rear support system;
a temporary bearing cross beam system is arranged between the middle support bracket system and the rear leg system of the main beam;
the main beam is provided with an overhead traveling crane moving beam extending along the transverse bridge direction, an overhead traveling crane traveling mechanism is arranged between the main beam and the overhead traveling crane moving beam, and the overhead traveling crane moving beam is provided with a hoisting overhead traveling crane;
a hydraulic system and an electrical system of the bridge erecting machine.
3. A method for erecting a bridge of a bridge girder erection machine according to claim 2, wherein said main girder is provided with two said crown block traveling beams arranged side by side along a length direction thereof, and a hoisting crown block on said crown block traveling beam is movable along a length direction of said crown block traveling beam.
4. A bridge erecting method for a bridge girder erection machine according to claim 3, wherein the hoisting crown blocks of the two crown block traveling beams respectively hoist both ends of the steel girder segment, and the installation position of the steel girder segment is adjusted by changing the positions of the hoisting crown blocks on the crown block traveling beams.
5. A bridge erecting method for a bridge girder erection machine according to claim 2, wherein the heights of the front bracket system and the rear leg system are respectively controlled according to a longitudinal slope of a bridge design to adjust an air attitude of the steel girder segment.
6. The bridge erecting method of the bridge erecting machine according to claim 2, wherein the passing through hole of the bridge erecting machine of the step (2) comprises the following steps:
the front support system and the rear support leg system lift the main beam upwards to separate the middle support system from the bridge floor;
the middle support bracket system moves to one end of the main beam close to the front support bracket system, and the front support bracket system and the rear support leg system retract to enable the middle support bracket system to be supported on the bridge floor;
the temporary support system moves to the middle of the main beam and is supported on the bridge floor;
retracting the front support system and the rear support leg system to separate from the bridge floor, and driving the main beam to move forwards to the bridge position to be constructed by utilizing a main beam longitudinal movement driving mechanism of the middle support system and a travelling mechanism of the temporary support system;
and (3) moving the front end of the main beam to the position of the pier of the composite beam to be constructed, stopping, lowering the front support system to support the pier, and lowering the rear support system to support the bridge deck to complete the via hole of the bridge girder erection machine.
7. A bridge erecting method for a bridge girder erection machine according to claim 6, wherein during the forward movement of the main girder, the crown block moving beam on the main girder drives the hoisting crown block to move backward relative to the main girder, so that there is no relative displacement between the crown block moving beam and the hoisting crown block and the middle support bracket system and the temporary support bracket system.
8. The bridge erecting method of the bridge erecting machine according to claim 2, wherein a rotating disc is arranged between a front leg and a front base of the front support system, a connecting disc is arranged between a main beam longitudinal moving mechanism and a bent beam of the middle support system, and the connecting disc and the bent beam can rotate relatively;
still including the step of adjustment bridging machine girder angle:
separating the rear supporting leg system and the temporary bearing beam system from the bridge floor;
unlocking a rotating disk of the front support system to enable the front support leg and the front base to rotate relatively;
the locking of a connecting disc of the middle support bracket system is released, so that the connecting disc and the bent beam can rotate relatively;
the transverse traveling mechanism of the middle support bracket system drives the bent beam to move along the length direction of the bent beam so as to enable the main beam to rotate around the front bracket system;
after the main beam rotates to a preset angle, the front support system and the middle support system are adjusted to be perpendicular to the main beam, the rotating disc and the connecting disc are locked, and the adjustment of the angle of the bridge girder erection machine is completed.
9. A method for erecting a bridge of a bridge girder erection machine according to claim 1, wherein the speed of falling the girder segment is reduced after the girder segment is fallen a predetermined distance from the bottom of the girder.
10. A method for erecting a bridge of a bridge girder erection machine according to claim 1, wherein the welding of the circumferential seams of the erected girder segments is performed before the next girder segment is erected.
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| CN114319145B (en) | 2024-02-06 |
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