CN114319145B - Bridge erection method using bridge girder erection machine - Google Patents
Bridge erection method using bridge girder erection machine Download PDFInfo
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- CN114319145B CN114319145B CN202111630210.5A CN202111630210A CN114319145B CN 114319145 B CN114319145 B CN 114319145B CN 202111630210 A CN202111630210 A CN 202111630210A CN 114319145 B CN114319145 B CN 114319145B
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- 229910000831 Steel Inorganic materials 0.000 abstract description 53
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Abstract
The application provides a bridge erection method by using a bridge girder erection machine, which comprises the following steps: (1) installing a bridge girder erection machine on a foundation beam; (2) The bridge girder erection machine passes through the hole and moves to the position of the bridge to be constructed, and the front end of the bridge girder erection machine is supported at the position of the front span bridge pier; (3) The girder transporting flat car transports the girder segments to the tail part of the bridge girder erection machine, the girder segments are hoisted by a hoisting crown block of the bridge girder erection machine to move forward to the position of the bridge to be constructed, the air posture and the installation position of the girder segments are adjusted, and the girder segments are lowered; (4) The girder transporting flat car transports the bridge deck plate to the tail part of the bridge girder erection machine, and the bridge deck plate is hoisted by using a hoisting crown block of the bridge girder erection machine to be paved on the constructed girder segment; (5) Repeating the steps (2) - (5) until the whole bridge frame is arranged. The bridge erection method solves the problem that the mountain area general steel plate composite beam cannot be erected, can realize sustainable construction of the steel beam sections and the bridge deck, and is high in construction efficiency.
Description
Technical Field
The application relates to the technical field of bridge construction, in particular to a bridge erection method by using a bridge girder erection machine.
Background
In the construction process of the traditional bridge, the traditional support is generally used for construction, and the construction is carried out by adopting 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 on-site manual work load is large, and the labor cost is high; and the traditional bridge construction support supports the cast-in-situ potential safety hazard greatly, and has great influence on the environment and traffic of cities. Especially in mountain construction, influenced by the topography condition, large-scale equipment directly lifts by crane whole double word steel concrete combination beam bridge to equipment itself requires too much, and the equipment is difficult to reach the preset position. Meanwhile, the support method faces the limitation of extra-high support and high safety risk, so that popularization of the double-I-steel plate concrete composite beam in the mountain area is limited to a certain extent.
Disclosure of Invention
The purpose of this application aims at providing a bridge erection method that utilizes the bridge crane, has solved the problem that the general volume steel sheet composite beam in mountain area that receives the topography restriction can't erect, has reduced the use of large-scale equipment, has filled the blank that the whole I-steel composite beam in mountain area erect, and the efficiency of construction is high.
In order to achieve the above object, the present application provides the following technical solutions:
a bridge erection method by using a bridge girder erection 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 the position of the bridge to be constructed, and the front end of the bridge girder erection machine is supported at the position of the front span bridge pier;
(3) The girder transporting flat car transports the girder segments to the tail part of the bridge girder erection machine, the girder segments are hoisted by a hoisting crown block of the bridge girder erection machine to move forward to the position of the bridge to be constructed, the air posture and the installation position of the girder segments are adjusted, and the girder segments are lowered;
(4) The girder transporting flat car transports the bridge deck plate to the tail part of the bridge girder erection machine, and the bridge deck plate is hoisted by using a hoisting crown block of the bridge girder erection machine to be paved on the constructed girder segment;
(5) Repeating the steps (2) - (5) until the whole bridge frame is arranged.
Further set up: the bridge girder erection machine installed in the step (1) comprises the following steps:
the front support system, the middle support system and the rear support system of the bridge girder erection machine are sequentially arranged along the forward bridge direction;
the front support system, the middle support system and the rear support system are provided with main beams;
a temporary bearing cross beam system is arranged between the middle support bracket system and the rear supporting leg system;
the main beam is provided with an overhead travelling crane moving beam extending along the transverse bridge direction, an overhead travelling crane travelling mechanism is arranged between the main beam and the overhead travelling crane moving beam, and a hoisting overhead travelling crane is arranged on the overhead travelling crane moving beam;
and installing a hydraulic system and an electric system of the bridge girder erection machine.
Further set up: 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 beams can move along the length direction of the crown block moving beams.
Further set up: the hoisting crown blocks of the two crown block moving beams respectively hoist two ends of the steel beam section, and the installation position of the steel beam section is adjusted by changing the position of the hoisting crown block on the crown block moving beam;
further set up: the heights of the front support system and the rear support system are respectively controlled according to the longitudinal slope of the bridge design so as to adjust the air posture of the steel beam section.
Further set up: 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 system lift the main girder upwards to separate the middle support system from the bridge deck;
the middle support bracket system moves to one end of the main beam, which is 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 deck;
the temporary bearing cross beam system moves to the middle part of the main beam and is supported on the bridge deck;
retracting the front support system and the rear support system to separate from the bridge deck, and driving the main beam to move forwards towards the bridge site to be constructed by utilizing a main beam longitudinal movement driving mechanism of the middle support system and a travelling mechanism of the temporary bearing cross beam system;
and stopping when the front end of the main beam moves to the position of the pier of the combined beam to be constructed, lowering the front support system to support the pier, and supporting the landing leg system on the bridge deck to complete the via hole of the bridge girder erection machine.
Further set up: in the forward moving process of the main beam, the overhead travelling crane moving beam on the main beam drives the lifting overhead travelling crane to move backwards relative to the main beam, so that no relative displacement exists between the overhead travelling crane moving beam, the lifting overhead travelling crane, the middle bracket system and the temporary bearing cross beam system.
Further set up: a rotary disk is arranged between the front supporting leg and the front base of the front support system, a connecting disk is arranged between the girder longitudinal movement driving mechanism of the middle support system and the bent beam, and the connecting disk and the bent beam can rotate relatively;
the method also comprises the step of adjusting the angle of the girder of the bridge girder erection machine:
separating the rear support leg system and the temporary bearing beam system from the bridge deck;
releasing the locking of the rotating disc of the front bracket system, so that the front supporting leg and the front base can rotate relatively;
unlocking the connecting disc of the middle support bracket system, so that the connecting disc and the bent beam can rotate relatively;
the transverse travelling 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 support bracket system;
and after the main beam rotates to a preset angle, the front bracket system and the middle bracket system are adjusted to be vertical to the main beam, and the rotating disc and the connecting disc are locked to finish the angle adjustment of the bridge girder erection machine.
Further set up: and the girder segments fall to a preset distance from the bottom of the girder, and then the girder falling speed is reduced.
Further set up: before the next steel beam segment is hoisted, the welding of the girth of the hoisted steel beam segment is required to be completed.
Compared with the prior art, the scheme of this application has following advantage:
1. in the bridge erection method utilizing the bridge girder erection machine, the construction efficiency of erection of the steel plate combined girder can be effectively improved, the construction resource allocation can be reduced, and the construction cost is reduced under the condition of ensuring the construction safety, quality and controllable progress. And adopt the erection method of this application bridge, need not to throw into in addition support, high mound longmen, large-scale hoisting equipment, need not level and harden the bridge along the line, can improve effectively because of the problem that the general volume steel sheet composite beam of mountain area limited by topography can't erect smoothly, the efficiency of construction is high.
2. In the bridge erection method using the bridge girder erection machine, bridge decks can be continuously erected after girder segments are erected, so that the construction period is greatly saved, the construction efficiency is improved, a set of bridge girder erection machine can be used for erecting girder segments and bridge decks, and the use of large-scale equipment is reduced.
Additional aspects and advantages of the 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 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, in which:
FIG. 1 is a schematic structural view of one embodiment of a bridge girder erection machine in the present application;
FIG. 2 is a schematic structural view of a front bracket system of the bridge girder erection machine;
FIG. 3 is a schematic view of the front frame system and pier anchoring of the bridge girder erection machine of the present application;
FIG. 4 is a schematic view of a pier reinforcement structure of the present application;
FIG. 5 is a schematic structural view of a center rest bracket system of the bridge girder erection machine;
FIG. 6 is an enlarged schematic view of portion A of FIG. 5;
FIG. 7 is a schematic view of the rear leg system of the bridge girder erection machine;
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 installation state of the bridge girder erection machine in the present application;
FIG. 9b is a schematic view of a bridge girder erection machine via hole in the present application;
FIG. 9c is a schematic view of a bridge girder segment hoisted by a girder erection machine in the present application;
fig. 9d is a schematic diagram of the bridge girder erection machine in the middle of the bridge.
In the figure, 1, a main beam; 2. a front support system; 21. a main girder joist; 22. a hydraulic jack; 23. a small lifting frame; 24. a telescoping tube; 25. a front leg; 251. an upper leg; 252. a lower leg; 26. a front base; 261. a support base; 2611. a top plate; 2612. a bottom plate; 2613. a connection part; 2614. stiffening ribs; 262. a limiting plate; 2621. reinforcing plates; 27. an upper cross beam; 28. a rotating disc; 3. a middle bracket system; 31. middle supporting leg joists; 32. a girder longitudinal movement driving mechanism; 321. a driving wheel box; 322. a driven wheel box; 323. a coupling assembly; 324. a driving motor; 325. a deflection wheel; 33. a transverse travelling mechanism; 331. a transverse traveling wheel box; 332. a middle leg rail; 34. a connecting disc; 341. positioning pin shafts; 4. a rear leg system; 41. a rear leg joist; 42. a rear leg; 43. rear leg hydraulic jack; 44. a small lifting frame; 45. 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 walking mechanism; 54. support legs; 541. an upper support tube; 542. a lower support column; 55. a support jack; 6. a lifting crown block; 7. a crown block moving beam; 71. crown block beam travelling mechanism; 1000. a bridge girder erection machine; 2000. bridge piers; 2001. a first reinforcing bar; 2002. stirrups; 2003. a second reinforcing bar; 2004. finish rolling deformed steel bars; 3000. a steel girder segment; 4000. a bridge deck; 5000. and (5) transporting the girder flatcar.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of illustrating the present application and are not to be construed as limiting the present application.
To the problem that the existing bridge girder erection machine is limited by the topography and causes that the construction difficulty is high and the general amount of steel plate composite girders cannot be erected smoothly, please refer to fig. 1 to 9d, the application provides a bridge girder erection machine 1000 and a bridge erection method using the bridge girder erection machine 1000, which do not need to put into a bracket, a high pier gantry and large hoisting equipment, do not need to level and harden the bridge along the line, have high construction efficiency, and can effectively ensure construction safety and quality.
The bridge girder erection machine 1000 comprises a girder 1, a front support system 2, a middle support system 3, a rear support system 4, a temporary bearing beam system 5, a lifting crown block 6, a hydraulic system and an electric system, wherein the girder 1 extends along the forward bridge direction, two ends of the girder 1 in the longitudinal direction are respectively set to be 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 correspondingly arranged at the front end supporting point, the middle position and the rear end supporting point of the girder 1, the front support system 2 is used for adjusting the height of the front end supporting point of the girder 1, the rear support system 4 is used for adjusting the height of the rear end supporting point of the girder 1, the temporary bearing beam system 5 is arranged at one side of the girder 1 close to the rear end supporting point and between the middle support system 3 and the rear support system 4, and the crown block 6 is arranged on the girder 1 and can move along the longitudinal direction of the girder 1 so as to be used for lifting a construction profile.
The girder 1 comprises two groups of truss structures which are arranged in parallel, a connecting truss is arranged between the two groups of truss structures to connect the two groups of truss structures into a whole, the cross section of each group of truss structures is in an A-shaped arrangement, each group of truss structures adopts a sectional structure, and two adjacent sections of truss structures are connected through a pin shaft. Preferably, each section of truss structure of the embodiment is 12m long, and the truss structure of the application adopts a sectional mode, so that the truss structure can be split into multiple sections for transportation, the transportation is convenient, and the transportation cost is reduced.
In the present embodiment, the front end of the main beam 1 in the traveling direction is regarded as a front end support point, and the rear end thereof is regarded as a rear end support point of the main beam 1.
The front bracket 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 girder joist 21 is arranged at the top of the main girder 1 along the transverse bridge in an extending way and is simultaneously connected with two groups of truss structures of the main girder 1, and the hydraulic telescopic component is arranged between the main girder joist 21 and the front supporting leg 25 so as to adjust the distance between the two hydraulic telescopic components.
Specifically, the hydraulic telescopic assembly comprises a hydraulic jack 22, a small lifting frame 23 and a telescopic sleeve 24, wherein the tail end of a cylinder barrel of the hydraulic jack 22 is fixed with the main girder joist 21, and the extending end of a piston rod of the hydraulic jack 22 is hinged with the small lifting frame 23. The telescopic sleeve 24 comprises an outer pipe and an inner pipe which are sleeved with each other, the top end of the outer pipe is fixed with the main girder joist 21, the bottom end of the inner pipe is connected with the bottom end of the front supporting leg 25, and meanwhile, the small lifting frame 23 is fixed with the inner pipe. The hydraulic jack 22 drives the small lifting frame 23 and drives the telescopic sleeve 24 to stretch and retract, and the telescopic sleeve 24 plays a role in guiding and limiting the front supporting leg 25 and the movement relative to the main beam 1.
Preferably, the hydraulic telescopic assembly, the front leg 25 and the front base 26 in this embodiment are provided with two sets corresponding to two sets of truss structures, the telescopic tubes 24 of each set of hydraulic telescopic assembly are located at two sides of the truss structure, and two sides of the small lifting frame 23 are fixedly connected with the inner tubes of the telescopic tubes 24 at two sides of the truss structure. In addition, the two sets of hydraulic telescopic components and the front supporting legs 25 are connected through the upper cross beam 27, the bottom ends of the inner tubes of the telescopic sleeves 24 of the two sets of hydraulic telescopic components are regulated by the upper cross beam 27, and the top ends of the two sets of front supporting legs 25 are fixed with the upper cross beam 27 so as to ensure the telescopic synchronism of the two sets of front supporting legs 25.
The front support leg 25 includes an upper support leg 251 and a lower support leg 252 that are sleeved with each other, the top end of the upper support leg 251 is fixed with the upper cross beam 27, the bottom end of the lower support leg 252 is fixed with the front base 26, and a plurality of mounting holes arranged along the height direction are respectively provided on the upper support leg 251 and the lower support leg 252, so that pins can be inserted into the mounting holes of the upper support leg 251 and the lower support leg 252 to fix the upper support leg 251 and the lower support 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 the 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 base 261, and the limiting plate 262 is vertically welded to the bottom of the side of the support base 261 welded to the lower leg 252. Simultaneously, supporting seat 261 towards keeping away from supporting seat 261 with lower landing leg 252 welded one side extends, and the supporting seat 261 of this application inwards has prolonged length for conventional support, the pier stud built-in fitting of being convenient for with supporting seat 261 is connected fixedly, can improve the atress condition of preceding landing leg 25 system effectively, improves the stability that preceding landing leg 25 system is connected with the pier stud, then ensures the stability of this application bridge crane 1000 working process.
The supporting seat 261 includes a top plate 2611 and a bottom plate 2612 that are arranged in parallel up and down, and a connection portion 2613 that is arranged between the top plate 2611 and the bottom plate 2612, the connection portion 2613 includes a plurality of i-beams whose two ends are welded with the top plate 2611 and the bottom plate 2612 respectively, and the i-beams extend along the forward bridge direction. Meanwhile, stiffening ribs 2614 are further respectively arranged on two sides of the i-steel, the stiffening ribs 2614 are connected with the i-steel and the top plate 2611 and/or the bottom plate 2612 at the end sides of the i-steel, and the stiffening ribs 2614 are arranged in a plurality of 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, the top plate 2611 of the supporting seat 261 in this embodiment is made of a 40mm thick steel plate, the bottom plate 2612 is made of a 20mm thick steel plate, the i-beam is made of a 36B i-beam, and the top plate 2611 and the bottom plate 2612 are welded with flanges of the i-beam.
The limiting plate 262 is arranged on the bottom plate 2612 of the supporting seat 261 to play a role in positioning the connection position of the front supporting leg 25 and the pier column, and a stiffening plate 2621 is arranged between the limiting plate 262 and the bottom plate 2612 to improve the connection strength between the limiting plate 262 and the supporting seat 261.
A rotating disc 28 is further arranged between the front support leg 25 and the front base 26, so that the front support 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 rotating disk 28 may be locked by threaded fasteners.
The bridge girder erection machine 1000 of the application realizes through the anterior support system 2 of its front end girder 1 and pier stud fixed connection, just the structure of the hydraulic jack 22 that adopts in the anterior support system 2 can make bridge girder erection machine 1000 when going up and down the sloping bridge, and the height of landing leg 25 before convenient adjustment need not the conversion, can be adapted to the pier stud connection of not co-altitude, has improved the stability and the security of landing leg 25 before bridge girder erection machine 1000 greatly.
The middle support bracket system 3 is installed in the middle of the bridge girder erection machine 1000, and comprises a middle support bracket 31, a girder longitudinal movement driving mechanism 32 and a transverse traveling mechanism 33, wherein the girder longitudinal movement driving mechanism 32 is arranged at the bottom of the girder 1 to be used for driving the girder 1 to move along a longitudinal bridge, the girder longitudinal movement driving mechanism 32 and the transverse traveling mechanism 33 are respectively arranged at the upper side and the lower side of the middle support bracket 31, the transverse traveling mechanism 33 is hinged at the bottom of the middle support bracket 31, the transverse traveling mechanism 33 moves along a transverse bridge, and the purpose of adjusting the inclination of the middle support bracket 31 can be achieved by adjusting the transverse traveling distance of the transverse traveling mechanism 33 so as to meet the requirements of different oblique bridges to rotate corresponding angles and meet the use of oblique bridges.
In this embodiment, the middle supporting leg joist 31 is configured as a curved beam, two ends of the middle supporting leg joist 31 of the main beam longitudinal movement driving mechanism 32 are respectively provided with a group so as to be respectively and correspondingly arranged below the two groups of truss structures of the main beam 1, and meanwhile, two groups of the transverse travelling mechanisms 33 are respectively provided at two ends of the middle supporting leg joist 31, so that the angle of the middle supporting leg joist 31 can be adjusted by adjusting the positions of the two groups of transverse travelling mechanisms 33 relative to the middle supporting leg 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.
The girder 1 longitudinal moving mechanism 53 comprises a driving wheel box 321, a driven wheel box 322, a coupling assembly 323 and a driving motor 324, wherein the driving motor 324 is connected with the driving wheel box 321, the coupling assembly 323 is connected with the driving wheel box 321 and the driven wheel box 322, so that the driving wheel box 321 drives the driven wheel box 322 to rotate under the driving of the driving motor 324, and the driving wheel box 321 and the driven wheel box 322 are arranged on two sides of a truss structure of the girder 1 along the forward bridge direction and are used for lower structural members of the truss structure, and can be used for driving the girder 1 to move along the forward bridge direction. Specifically, the driving wheel box 321 includes a driving wheel box housing and a driving wheel rotationally disposed in the driving wheel box housing, the driven wheel box 322 includes a driven wheel box housing and a driven wheel rotationally disposed in the driven wheel box housing, and the coupling assembly 323 includes a rotating shaft connected with an axle center of the driving wheel and an axle center of the driven wheel.
Further, the top of the driving wheel box 321 and the driven wheel box 322 are respectively provided with a deflection wheel 325 which is abutted to the top of the truss structure lower part of the main beam 1, and the driving wheel box 321 and the driven wheel box 322 are connected with the deflection wheels 325 corresponding to the driving wheel box 321 and the driven wheel box through chains, so that an upper and lower full driving wheel can be formed, smooth running of the through holes in the front and the rear of the main beam 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 forward bridge direction, so that the problem that the main beam 1 is bitten in the front-rear running process of the main beam 1 is solved.
The connecting plate 34 is arranged between the girder 1 longitudinal moving mechanism and the bent beam, the connecting plate 34 is fixed on the bent beam through a positioning pin 341, the connecting plate 34 is connected with the bent beam through a positioning pin 341, and the connecting plate 34 can rotate relative to the bent beam when the positioning pin 341 is in an unlocked state. And flange blocks are symmetrically arranged on the connecting disc 34 along the radial direction of the connecting disc, the connecting disc 34 is detachably connected with the girder 1 longitudinal movement mechanism through the flange blocks, and the girder 1 longitudinal movement mechanism and a truss structure corresponding to the girder can rotate relative to the bent girder through the connecting disc 34.
The transverse traveling mechanism 33 comprises a transverse traveling wheel box connected with the middle supporting leg joist 31, the transverse traveling wheel box 331 comprises a wheel box shell and traveling wheels rotationally arranged in the wheel box shell, a middle supporting leg rail 332 extending along a transverse bridge is arranged below the transverse traveling wheel box 331, the traveling wheels of the transverse traveling wheel box 331 are in rolling fit with the middle supporting leg rail 332, and a traveling motor connected with the traveling wheels is arranged on the shell of the wheel box shell so as to drive the transverse traveling wheel box to move on the middle supporting leg rail 332 and drive the middle supporting leg joist 31 to move along the length direction of the middle supporting leg joist 31.
The middle support bracket system 3 of the application realizes that the bridge girder erection machine 1000 moves along the bridge to the through hole when the girder 1 longitudinally moves the mechanism, two traveling wheel boxes are arranged under two groups of truss structures of the girder 1, four-wheel drive of the middle support leg is realized, the bridge girder erection machine 1000 is in the through hole process, the longitudinal movement of the girder 1 is more stable, and the operation is safer and more reliable.
The rear supporting leg system 4 is installed at a rear end supporting point of the bridge girder erection machine 1000 and comprises a rear supporting leg supporting beam 41, a rear supporting leg 42, a rear supporting leg hydraulic jack 43, a small lifting frame 44, a bearing platform 45 and a lower support 46, wherein the rear supporting leg supporting beam 41 is arranged at the top of the main girder 1 and is connected with two groups of truss structures, the bottoms of the truss structures are connected with the bearing platform 45, the rear supporting leg 42 is in the form of a telescopic sleeve 24 and comprises an upper rear supporting leg 42 and a lower rear supporting leg 42 which are mutually sleeved, the top end of the upper rear supporting leg 42 is connected with the rear supporting leg supporting beam 41, the bottom end of the lower rear supporting leg 42 penetrates through the bearing platform 45 and is connected with the lower support 46, and the lower support 46 can be anchored on a bridge deck 4000 for fixing. The cylinder barrel tail end of the rear support leg hydraulic jack 43 is mounted at the top end of the truss mechanism through a jack saddle, the extending end of a piston rod of the cylinder barrel tail end is hinged with the small lifting frame 44, and the small lifting frame 44 is fixed with the lower rear support leg 42, so that the height of the rear support leg 42 is adjusted through the extension and retraction of the rear support leg hydraulic jack 43, and the purpose of adjusting the height of a rear end supporting point of the main beam 1 is achieved.
In addition, a temporary bearing beam system 5 is arranged between the middle support bracket system 3 and the rear support leg system 4, and the temporary bearing beam system 5 is movably assembled below the truss structure and can be used for sharing the pressure of the periphery formed by the rear support leg system 4 at the rear end of the girder 1 of the bridge girder erection machine 1000 in the process of passing holes and girder connection, so that the steel girder panel is prevented from being damaged to play a role in protection. The temporary bearing beam system 5 comprises an upper supporting beam 51 and a lower supporting beam 52, the upper supporting beam 51 is arranged at the bottom of the beam framework of the main beam 1, a traveling mechanism 53 is arranged between the upper supporting beam 51 and the truss structure, the traveling mechanism 53 comprises supporting wheels and a traveling driving motor, the supporting wheels are in rolling fit with rails arranged at the bottom of the truss framework of the main beam 1, and the traveling driving motor is connected with the supporting wheels and used for driving the supporting wheels to rotate. The telescopic support legs 54 are symmetrically arranged between the upper support beam 51 and the lower support beam 52 at intervals, the upper end and the lower end of the support legs 54 are respectively fixed with the upper support beam 51 and the lower support beam 52, the support legs 54 comprise an upper support tube 541 and a lower support column 542 which are mutually sleeved, a plurality of mounting holes are correspondingly formed in the upper support tube 541 and the lower support column 542, and the upper support tube 541 and the lower support column 542 can be fixed through the mounting holes of the upper support tube 541 and the lower support column 542 through pin shafts. A vertically arranged supporting jack 55 is further provided 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 by the supporting jack 55.
In addition, the top of girder 1 is equipped with along the horizontal bridge orientation extension and erects two sets of overhead traveling crane movable beam 7 at truss structure top, overhead traveling crane movable beam 7's both ends are equipped with overhead traveling crane beam running gear 71, overhead traveling crane movable beam 7 passes through overhead traveling crane beam running gear 71 movably assembles truss mechanism's top is realized through overhead traveling crane beam running gear 71 overhead traveling crane movable beam 7 is followed girder 1's lengthwise removes. A lifting crown block 6 is provided on the crown block moving beam 7, and a hoist is provided on the lifting crown block 6 to hoist the girder segment 3000 and the bridge deck 4000, thereby completing the longitudinal movement of the girder segment 3000 and the bridge deck 4000 and mounting in place. The movable pulley block is arranged below the winch, and the arrangement of the movable pulley block can play a role in saving power for the lifting operation of the winch.
The bridge girder erection machine 1000 of this application has been through optimizing self structure, has highly controlled bridge girder erection machine 1000 at reasonable within range to the girder 1 that adopts two truss structures can increase bridge girder erection machine 1000's width, is convenient for hoist and mount girder segment 3000 and decking 4000, and can adjust girder segment 3000 and decking 4000's mounted position, makes the girder steel of a large amount need not large-scale equipment and can accomplish the erection in the mountain area.
Therefore, in combination with the above, the present application further relates to a bridge erecting method using the bridge girder erection machine 1000 as described above, please combine fig. 9a to 9d, specifically including the following steps:
(1) The bridge girder erection machine 1000 is installed on a foundation beam or a bridge segment which has been constructed.
As is known, the bridge girder erection machine 1000 is composed of a main girder 1, a front bracket system 2, a middle bracket system 3, a rear supporting leg system 4, a temporary bearing beam system 5, a crane crown block 6, a hydraulic system, an electric system and the like, so that the bridge girder erection machine 1000 can be transported to a construction site by an automobile, and can be unloaded and installed by utilizing the cooperation of an automobile crane.
The bridge girder erection machine 1000 sequentially sets a front bracket system 2, a middle bracket system 3 and a rear leg system 4 along the forward direction of a foundation beam or a bridge section which has been constructed, then installs the girder 1 on the front bracket system 2, the middle bracket system 3 and the rear leg system 4, and installs a temporary load-bearing cross beam system 5 between the middle bracket system 3 and the rear leg system 4 at the same time as the girder 1. Then, an overhead travelling crane moving beam 7 extending along the transverse bridge direction is mounted on the main beam 1, an overhead travelling crane beam travelling mechanism 71 is arranged between the overhead travelling crane moving beam 7 and the main beam 1 and is used for driving the overhead travelling crane moving beam 7 to move along the longitudinal direction of the main beam 1, the overhead travelling crane moving beam 7 is also provided with a lifting overhead travelling crane 6, and the lifting overhead travelling crane 6 can move along the longitudinal direction of the overhead travelling crane moving beam 7. Finally, the hydraulic system and the electrical system of the bridge girder erection machine 1000 are installed.
Preferably, two crown block moving beams 7 are arranged on the main beam 1 in the embodiment side by side along the longitudinal direction of the main beam, and the two hoisting crown blocks 6 on the crown block moving beams 7 can hoist two ends of the steel beam segment 3000 respectively, so as to improve the hoisting stability.
(2) The bridge girder erection machine 1000 is moved to the position of the bridge to be constructed, and the front end of the bridge girder erection machine is supported at the front span pier 2000.
When the bridge girder erection machine 1000 passes through the hole, the girder 1 is lifted upwards through the front support system 2 and the rear support leg system 4, the middle support system 3 is separated from the bridge deck, then the middle support system 3 moves to one end of the girder 1 close to the front support system 2, and the front support system 2 and the rear support leg system 4 retract to enable the middle support system 3 to be supported on the bridge deck. At the same time, the temporary load beam system 5 is moved to the middle of the main beam 1 and supported on the deck. The front support system 2 and the rear support system 4 are then retracted to disengage the two from the deck, and the girder 1 is pushed forward toward the bridge site to be constructed by the girder 1 longitudinal movement mechanism of the middle support system 3 and the traveling mechanism 53 of the temporary load-bearing cross beam system 5. In addition, in the process of forward movement of the main beam 1, the crown block moving beam 7 on the main beam 1 drives the lifting crown block 6 to move backward relative to the main beam 1, so that no relative displacement exists between the crown block moving beam 7 and the lifting crown block 6, the middle bracket system 3 and the temporary bearing cross beam system.
When the front end of the main beam 1 moves to the position of the combined beam pier 2000 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 stretches out and the front support leg 25 of the front support system is supported at the pier 2000, and simultaneously, the front base 26 is anchored with the pre-embedded finish rolling screw thread steel 2004 at the pier top of the pier 2000, so that the front support system 2 is fixedly connected with the pier 2000.
Further, the pier 2000 department of this application sets up pier reinforced structure, pier top reinforced structure includes the first reinforcing bar 2001 of being connected with the upper longitudinal reinforcement of pier top tie beam, the longitudinal reinforcement integrated into one piece in first reinforcing bar 2001 and the pier top tie beam. The first steel bar 2001 extends out of the pier 2000 and bends downwards, after the first steel bar 2001 bends downwards to a preset height, secondary bending is performed, the second bent first steel bar 2001 extends obliquely into the pier, and the preset heights of the primary bending point and the secondary bending point of the first steel bar 2001 are equal to the thickness of the pier cap, so that a closed structure is formed between the first steel bar 2001 and the pier. The first steel bar 2001 is also provided with stirrups 2002 connected with the bridge pier 2000 at a bending position, the stirrups 2002 form an expansion part at the pier top, the area of the expansion part is larger than the pier top area, and the first bending points of the first steel bar 2001 are uniformly distributed along the inner periphery of the stirrups 2002. Specifically, the maximum length of the enlarged portion along the length direction of the first reinforcement 2001 from the center of the pier column is the sum of the radius length of the pier column and a first preset length, and the first preset length is preferably 110mm; the maximum length of the expansion part along the center of the pier column 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 expansion part takes the center of the pier column as the center and extends along the 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 reinforcement 2001 is the pier stud radius length plus 110mm, and the length of the enlarged portion along the length direction perpendicular to the first reinforcement 2001 is the pier stud radius length plus 200mm. The expansion part is further provided with second reinforcing bars 2003 perpendicular to the first reinforcing bars 2001, the second reinforcing bars 2003 are arranged side by side along the length direction of the first direction, and the second reinforcing bars 2003 are uniformly arranged in the stirrups 2002.
This application is through setting up pier reinforced structure in mound top department, utilize first reinforcing bar 2001 and the stirrup 2002 that are connected with mound top tie beam form the extension at the mound top, and first reinforcing bar 2001 extends to outside the pier 2000 and the extension of buckling downwards, can effectively improve the anti split ability at pier 2000 edge, and the area of mound top is bigger can be replaced to the extension, broken and need set up supplementary mound under the not enough circumstances of mound top width and erect bridge crane 1000 for the form that the girder steel erect is bigger economic high-efficient, and the adaptability can strengthen.
In addition, it should be noted that the front bracket system 2 requires the measurement of the discharge position at pier ejection and pre-embedding of the anchored finish rolled deformed steel 2004 and the widening support of the pier stud before erection. In addition, the bridge pier 2000 pre-embedded with the finish rolled deformed steel bars 2004 needs to release the front base 26 and the lower leg 252 of the front bracket system 2 in advance to anchor with the pier top before the bridge girder erection machine 1000 passes the hole, and then the lower leg 252 is connected with the upper leg 251 after passing the hole.
In another embodiment, the main beam 1 is installed in two sections, wherein the front section of the main beam 1 is provided with the front bracket system 2, and the rear supporting leg system 4 is installed on the rear section of the main beam 1, when the bridge girder erection machine 1000 is installed, the middle bracket system 3 and the temporary beam supporting system can be arranged at the end of the foundation beam or the bridge where construction is completed, then the front section of the main beam 1 on which the front bracket system 2 is installed is erected on the middle bracket system 3 and the temporary beam supporting system, and the front section of the main beam 1 is driven to move forward to the bridge pier 2000 of the bridge station to be constructed by using the driving mechanism of the middle bracket system 3 and the driving mechanism of the temporary beam supporting system, so that the front bracket system 2 is anchored with the bridge pier 2000. 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 a pin shaft.
(3) The girder segment 3000 is transported to the tail of the bridge girder erection machine 1000 by the girder transporting flat car 5000, the girder segment 3000 is hoisted by a bridge crane crown block of the bridge girder erection machine 1000 to move forward to a bridge position to be constructed, the aerial posture and the installation position of the girder segment 3000 are adjusted, and the girder segment 3000 is lowered.
Specifically, the aerial posture of the steel beam segment 3000 may be adjusted by controlling the heights of the front bracket system 2 and the rear leg system 4, respectively, according to the longitudinal slope of the bridge design; meanwhile, both ends of the steel beam segment 3000 are respectively hoisted by the hoisting crown blocks 6 of the two crown block moving beams 7, so that the installation position of the steel beam segment 3000 can be adjusted by changing the transverse position of the hoisting crown block 6 on the crown block moving beams 7.
In other embodiments, the steel beam segment 3000 is divided into multiple sections along the transverse bridge, and the installation of the same transverse bridge on the steel beam segment 3000 can also be performed by adjusting the beam position of the lifting crown block 6 on the crown block moving beam 7.
In addition, when the steel beam segment 3000 falls to a preset distance from the bottom of the main beam 1, the speed of falling the beam needs to be reduced, so that construction errors easily caused by too high speed are avoided, and a large potential safety hazard exists.
When the steel girder segment 3000 is lowered to the construction bridge site, the steel girder segment 3000 and the installed steel girder segment are welded by the girth joint, so that the construction safety of the subsequent erection of the via hole of the bridge girder erection machine 1000 is ensured.
(4) The traffic balance car carries the deck slab 4000 to the tail of the bridge girder erection machine 1000, and the deck slab 4000 is hoisted by the hoisting crown block 6 of the bridge girder erection machine 1000 to be laid on the constructed girder segment 3000.
The lifting crown block 6 of the bridge girder erection machine 1000 lifts the bridge deck 4000 on the girder transporting flat car 5000 to the construction bridge site to move slowly, a rotating mechanism is arranged on the lifting crown block 6, so that the lifting appliance is rotated by the rotating mechanism to adjust the aerial installation posture of the bridge deck 4000 in the process of lifting the bridge deck 4000, then the bridge deck 4000 slowly falls down and is 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, as more steel bars extend out of the bridge deck 4000, more shear nails are arranged on the shear groove steel bars and the steel beams, the position relationship between adjacent bridge deck 4000 needs to be noted during installation, and mutual collision is prevented. If the shear groove steel bar collides with the shear nails, the position of the bridge deck 4000 needs to be adjusted to ensure the installation positioning accuracy of the bridge deck 4000.
(5) Repeating the steps (2) - (4) until the whole bridge frame is arranged.
In addition, the bridge girder erection machine 1000 of the application can meet the construction requirement of the inclined bridge by adjusting the angle of the main girder 1 of the bridge girder erection machine 1000 for the inclined bridge, and specifically comprises the following steps:
firstly, the rear support leg system 4 and the temporary bearing beam system 5 are separated from the bridge deck, then the locking of the rotary disk 28 between the front support leg 25 and the front base 26 in the front support frame system 2 is released, the front support leg 25 and the front base 26 can rotate relatively, and meanwhile, the locking of the connecting disk 34 in the middle support frame system 3 which is in pin connection with the middle support leg joist 31 is released, so that the connecting disk 34 can rotate relatively to the middle support leg joist 31. Subsequently, 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 of the middle support leg joist, and at the moment, the girder 1 rotates around the front support bracket system 2, so that the angle of the girder 1 of the bridge girder erection machine 1000 is adjusted.
After the girder 1 rotates to a preset angle, the central axes of the front bracket system 2 and the middle bracket system 3 are adjusted to be parallel to the axis of the girder 1, and the rotating disk 28 and the connecting disk 34 are locked, so that the angle of the girder 1 of the bridge girder erection machine 1000 can be adjusted, and the construction of the girder segment 3000 of the inclined bridge can be correspondingly carried out.
The bridge construction method of the bridge girder erection machine 1000 can effectively improve the construction efficiency of erection of the steel plate composite girder, reduce the configuration of construction resources, and reduce the construction cost under the condition of ensuring the construction safety, quality and controllable progress. And adopt the construction methods of bridge crane 1000 and bridge of this application, need not to throw into in addition support, high mound longmen, large-scale hoisting equipment, need not level and harden the bridge along the line, can improve effectively because of the problem that the general volume steel sheet composite beam of mountain area limited by topography can't erect smoothly, the efficiency of construction is high.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for a person skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (9)
1. A bridge erection method by using a bridge girder erection machine is characterized by comprising the following steps:
(1) The bridge girder erection machine is installed on a foundation girder, wherein a front support system, a middle support system and a rear support leg system of the bridge girder erection machine are sequentially arranged along the bridge direction, a main girder is installed on the front support system, the middle support system and the rear support leg system, a temporary bearing cross beam system is installed between the middle support system and the rear support leg system, a rotary disc is arranged between a front support leg and a front base of the front support system, a connecting disc is arranged between a main girder longitudinal movement driving mechanism of the middle support system and a bent beam, and the connecting disc and the bent beam can relatively rotate;
(2) The bridge girder erection machine passes through the hole and moves to the position of the bridge to be constructed, and the front end of the bridge girder erection machine is supported at the position of the front span bridge pier;
(3) The girder transporting flat car transports the girder segments to the tail part of the bridge girder erection machine, the girder segments are hoisted by a hoisting crown block of the bridge girder erection machine to move forward to the position of the bridge to be constructed, the air posture and the installation position of the girder segments are adjusted, and the girder segments are lowered;
(4) The girder transporting flat car transports the bridge deck plate to the tail part of the bridge girder erection machine, and the bridge deck plate is hoisted by using a hoisting crown block of the bridge girder erection machine to be paved on the constructed girder segment;
(5) Repeating the steps (2) - (5) until the whole bridge frame is arranged;
in addition, in the construction process, the method further comprises the step of adjusting the angle of the main beam of the bridge girder erection machine: separating the rear support leg system and the temporary bearing beam system from the bridge deck; releasing the locking of the rotating disc of the front bracket system, so that the front supporting leg and the front base can rotate relatively; unlocking the connecting disc of the middle support bracket system, so that the connecting disc and the bent beam can rotate relatively; the transverse travelling 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 support bracket system; and after the main beam rotates to a preset angle, the front bracket system and the middle bracket system are adjusted to be vertical to the main beam, and the rotating disc and the connecting disc are locked to finish the angle adjustment of the bridge girder erection machine.
2. The bridge erection method of the bridge girder erection machine according to claim 1, wherein the installing of the bridge girder erection machine in the step (1) further comprises the steps of:
the main beam is provided with an overhead travelling crane moving beam extending along the transverse bridge direction, an overhead travelling crane travelling mechanism is arranged between the main beam and the overhead travelling crane moving beam, and a hoisting overhead travelling crane is arranged on the overhead travelling crane moving beam;
and installing a hydraulic system and an electric system of the bridge girder erection machine.
3. The bridge erection method of the bridge girder erection machine according to claim 2, wherein the main girder is provided with two crown block moving beams arranged side by side along a length direction thereof, and a hoisting crown block on the crown block moving beam is movable along the length direction of the crown block moving beam.
4. A bridge erecting method of a bridge girder erection machine according to claim 3, wherein the hoisting crown blocks of the two crown block moving beams hoist both ends of the girder segments, respectively, and the installation position of the girder segments is adjusted by changing the position of the hoisting crown block on the crown block moving beam.
5. The bridge erecting method of the bridge girder erection machine according to claim 2, wherein the heights of the front bracket system and the rear leg system are controlled to adjust the aerial posture of the girder segment according to the longitudinal slope of the bridge design, respectively.
6. The bridge erection method of the bridge girder erection machine according to claim 2, wherein the via hole of the bridge girder erection machine of the step (2) comprises the steps of:
the front support system and the rear support system lift the main girder upwards to separate the middle support system from the bridge deck;
the middle support bracket system moves to one end of the main beam, which is 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 deck;
the temporary bearing cross beam system moves to the middle part of the main beam and is supported on the bridge deck;
retracting the front support system and the rear support system to separate from the bridge deck, and driving the main beam to move forwards towards the bridge site to be constructed by utilizing a main beam longitudinal movement driving mechanism of the middle support system and a travelling mechanism of the temporary bearing cross beam system;
and stopping when the front end of the main beam moves to the position of the pier of the combined beam to be constructed, lowering the front support system to support the pier, and supporting the landing leg system on the bridge deck to complete the via hole of the bridge girder erection machine.
7. The bridge erection method of the bridge girder erection machine according to claim 6, wherein in the process of forward movement of the girder, a crane travelling beam on the girder drives a lifting crane to move backward relative to the girder, so that no relative displacement exists between the crane travelling beam and the lifting crane, the middle bracket system and the temporary bearing cross beam system.
8. The bridge erection method of the bridge girder erection machine according to claim 1, wherein the girder segment is dropped to a preset distance from the bottom of the girder to reduce a girder dropping speed.
9. The bridge erection method of the bridge girder erection machine according to claim 1, wherein welding of the girth of the hoisted girder segment is completed before hoisting the next girder segment.
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