CN110184945A - Four front leg strut systems and erection method for Bridge Erector - Google Patents
Four front leg strut systems and erection method for Bridge Erector Download PDFInfo
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- CN110184945A CN110184945A CN201910631858.0A CN201910631858A CN110184945A CN 110184945 A CN110184945 A CN 110184945A CN 201910631858 A CN201910631858 A CN 201910631858A CN 110184945 A CN110184945 A CN 110184945A
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- 210000001364 upper extremity Anatomy 0.000 title claims abstract description 188
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 239000000725 suspension Substances 0.000 claims description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 244000261422 Lysimachia clethroides Species 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 5
- 238000007596 consolidation process Methods 0.000 abstract description 3
- 239000004567 concrete Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention belongs to bridge erection technical fields, disclose a kind of four front leg struts and its erection method for Bridge Erector, and Bridge Erector includes girder, front leg strut crossbeam, and front leg strut crossbeam is arranged on girder and can be vertically moved on girder；It is characterized in that, four front leg strut systems include four front leg struts of a row, the lower end of front leg strut crossbeam is hingedly set, the column of each front leg strut can carry out the rotation of flexible and longitudinal direction in the height direction, make girder steel main longitudinal grider across front leg strut by way of alternately flexible front leg strut and longitudinally rotating, bridge formation function is set successively to set up left and right two width girder steel, to realize girder steel fast hoisting.It is constructed using the Bridge Erector in the present invention, additional stress is generated when avoiding installation after front beam, keep girder steel bridge completion state identical as design, reduce high altitude operation, front beam is installed in girder steel consolidation shed, and via hole of Bridge Erector can lift left and right two width girder steel simultaneously, construction speed is fast, highly-safe.
Description
Technical field
The present invention relates to bridge erection technical fields, and in particular to a kind of four front leg strut systems and frame for Bridge Erector
Equipment, method.
Background technique
Bridge Erector is applied to numerous bridge superstructures and constructs, and beam bridge is a kind of widely used structure type, master
Want component part: based on distinguishing from bottom to top, pier, precast beam and bridge floor.Bridge Erector is set in its building course
Standby, its function is exactly the precast beam poured to be lifted to installation site specified on pier.Further, since bridge is logical
Often it is made of multispan, and the lifting of precast beam can only carry out by cross, therefore, Bridge Erector is in addition to having the function of hoisting prefabricated beam
Can, it is also equipped with the ability walked forward, i.e., usually said across hole ability.Prestressed concrete beam or steel box-girder；By in field
With over-the-counter transport to lifting building site, corresponding hoisting machinery and hoisting are used according to the different situations at scene, girder steel is pressed
In the sequence lifting installation to the support of pier of design, finally according to design requirement, turn girder system at simply supported beam or through exertin system
It changes to form continuous beam.
Currently, front outrigger for bridge girder erection machine is often only there are two front leg strut, when Bridge Erector lifting operation, before front leg strut falls within bent cap
End, thus to concede space wait lift, fall beam, but front leg strut has one disadvantage in that, for front end beyond bent cap and front end closing
The lifting of girder steel whole hole be unable to satisfy lifting, the left and right width of Bridge Erector need is set up respectively, and construction speed is slow.
Therefore, this field needs a kind of next for four front leg strut systems of Bridge Erector, expanded letter Bridge Erector and erection method
It solves the above problems.
Summary of the invention
In order to solve the above problem in the prior art, the present invention provides a kind of four front leg struts for expanded letter Bridge Erector
System, Bridge Erector include girder, front leg strut crossbeam, and front leg strut crossbeam is arranged on girder and can carry out longitudinal shifting on girder
It is dynamic；It is characterized in that, four front leg strut systems include four front leg struts arranged side by side, the top of each front leg strut is and front leg strut
Crossbeam is hingedly arranged, and the column of each front leg strut can carry out flexible and longitudinal rotation in the height direction, by alternately flexible
Front leg strut and the mode longitudinally rotated make girder steel main longitudinal grider pass through front leg strut, and bridge formation function is made successively to set up left and right two width girder steel,
To realize girder steel fast hoisting.
In the above-mentioned optimal technical scheme for four front leg strut systems of expanded letter Bridge Erector, branch before each front leg strut is each
Leg column includes being equipped with telescopic column stem nested structure and jacking hydraulic cylinder, passes through branch before jacking hydraulic cylinder jacking post core adjustment
The height of leg；Telescopic column slides realization height by jacking hydraulic cylinder jacking column column core in column sleeve and adjusts, and is adjusted in place
After plug pin shaft fixed column core and column sleeve, make jack hydraulic cylinder be not subjected to load；The top of column sleeve and front leg strut crossbeam are hinged
Setting, one end of rotary hydraulic cylinder are connect with front leg strut crossbeam, and the other end of rotary hydraulic cylinder and the middle and upper part of column sleeve connect
Connect setting；
Longitudinal rotation is carried out in front leg strut, first makes the reduction of front leg strut height, front leg strut crossbeam is locked with girder, makes to revolve
Turn hydraulic cylinder, is able to carry out front leg strut and longitudinally rotates.
In the above-mentioned optimal technical scheme for four front leg strut systems of expanded letter Bridge Erector, each front leg strut further includes hinge
About collar and hinged set hydraulic cylinder are connect, hinged set is set in the outside of column sleeve, and hinged set can carry out up and down on column sleeve
It is mobile；Hinged set hydraulic cylinder one end is installed in hinged constraint and puts on, and the other end is installed on the outer wall of column sleeve, is cut with scissors by control
Female connector hydraulic cylinder locks hinged set to the hinge point of front leg strut, makes front leg strut not and can be carried out longitudinal rotation.
In the above-mentioned optimal technical scheme for four front leg strut systems of expanded letter Bridge Erector, girder is main forced section
Part, girder include multiple girder sections；By double-pin axis connection, the lower part of girder is provided with vertical for front leg strut adjacent girder section
To mobile long rails.
In the above-mentioned optimal technical scheme for four front leg strut systems of expanded letter Bridge Erector, before four front leg struts are first
Supporting leg, the second front leg strut, third front leg strut and the 4th front leg strut, four front leg struts in pairs, before the first front leg strut and second
Supporting leg is one group, and the first front leg strut is arranged in the outside of the second front leg strut, and third front leg strut and the 4th front leg strut are one group, the 4th
Front leg strut setting is arranged on the outside in third front leg strut.
In the above-mentioned optimal technical scheme for four front leg strut systems of expanded letter Bridge Erector, under the column core of front leg strut column
Portion is provided with multiple pin shaft holes, and pin shaft hole is arranged in a vertical direction, and column core and column sleeve are locked by pin shaft, to meet preceding branch
The bearing height of leg, which is adjusted, to be required, and after pin shaft is fixed, the telescopic hydraulic oil cylinder of front leg strut is made to be not subjected to load.
On the other hand, the present invention also provides a kind of expanded letter Bridge Erector, expanded letter Bridge Erector includes four above-mentioned front leg strut systems.
On the other hand, the present invention also provides a kind of erection method, Bridge Erector includes stringer purlin vehicle, fortune beam trolley and above-mentioned
Four foreleg systems, erection method the following steps are included:
Step S1, the longitudinal traversing work of preparation later in place of right width girder steel；
Step S2, girder steel is traversing, and at the second front leg strut of inside, the second front leg strut of inside is withdrawn, and girder steel is traversing to outside the
At one front leg strut；
Step S3, the second front leg strut of inside are transferred to working condition, and the first front leg strut of outside is withdrawn, and girder steel is laterally moved to specify
Position, girder steel are transferred to design height, and stringer splicing operation is completed；
Step S4 longitudinally lifts left width girder steel in place, at traversing to the corresponding inside third front leg strut of girder steel；
Step S5, girder steel it is traversing to corresponding inside third front leg strut at, inside third front leg strut withdraw；
Step S6, girder steel are traversing at the 4th front leg strut of outside；
Step S7, inside third front leg strut are transferred to working condition, and the 4th front leg strut of outside is withdrawn, and gooseneck moves on to design
Position, girder steel transfer to design height and complete stringer splicing operation.
In the optimal technical scheme of above-mentioned erection method, stringer purlin vehicle includes the first stringer purlin vehicle and the second stringer purlin
Vehicle, fortune beam trolley include the first fortune beam trolley and the second fortune beam trolley.
In the optimal technical scheme of above-mentioned erection method, before " step S1 " further include:
First stringer purlin vehicle, the second stringer purlin vehicle run the preparation before doing good luck beam to the tail portion of Bridge Erector；
First fortune beam trolley and the second fortune beam trolley carry out fortune beam operation, when the preceding suspension centre of girder steel reaches the first stringer purlin vehicle
Underface after, the preceding suspension centre of girder steel is anchored on the suspender of the first stringer purlin vehicle and is promoted specified altitude assignment；
First stringer purlin vehicle and the first beam car cooperation fortune beam, when girder steel after suspension centre reach the second stringer purlin vehicle just under
The rear suspension centre of girder steel is anchored on the suspender of the second stringer purlin vehicle and promoted to specified altitude assignment by Fang Hou；
First stringer purlin Che Yunliang stops fortune beam when girder steel reaches front designated position.
It will be appreciated to those of skill in the art that in the preferred technical solution of the present invention, such as with existing Bridge Erector into
Row lifts length and is greater than the closed girder steel integral hoisting work of across footpath and front end, and front beam is then after necessary band steel girder erection completion
It is installed, is constructed using the Bridge Erector in the present invention, generated additional stress when avoiding installation after front beam, make girder steel
Bridge completion state is identical as design, and reduces high altitude operation, safer, and front beam is installed in girder steel consolidation shed, Bridge Erector
Via hole can lift left and right two width girder steel simultaneously, and construction speed is fast, highly-safe.
Detailed description of the invention
The preferred embodiment of the present invention described with reference to the accompanying drawings, in attached drawing:
Fig. 1 is the structural schematic diagram of the four front leg strut systems for Bridge Erector of the invention；
Fig. 2 is the main view of front leg strut of the invention；
Fig. 3 is the side view of front leg strut of the invention；
Fig. 4 is the flow chart of erection method of the invention；
Appended drawing reference: 1, front leg strut；101, column sleeve；102, column core；2, girder steel；3, front leg strut crossbeam；4, stringer purlin vehicle；5,
Hinged about collar；6, rotary hydraulic cylinder；7, about collar hydraulic cylinder；8, pin shaft；9, articulated shaft.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, term " in ", "upper", "lower", " cross ", the instructions such as "inner" side
To or the term of positional relationship be direction based on the figure or positional relationship, this is intended merely to facilitate description, rather than
Indication or suggestion described device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage
Solution is limitation of the present invention.In addition, term " first ", " second " are used for description purposes only, and it should not be understood as instruction or dark
Show relative importance.
In addition it is also necessary to explanation, in the description of the present invention unless specifically defined or limited otherwise, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.To those skilled in the art, above-mentioned term can be understood in the present invention as the case may be
In concrete meaning.
The existing front outrigger for bridge girder erection machine pointed out based on background technique is only there are two front leg strut, when Bridge Erector lifting operation,
Front leg strut falls within bent cap front end, so that space is conceded to fall beam to hoisting beam, but front leg strut has one disadvantage in that, and it is super for front end
The whole hole lifting of the closed girder steel of bent cap and front end out is unable to satisfy lifting, and Bridge Erector needs left and right width to set up respectively, and construction speed is slow
The problem of.Lifting length such as, which is carried out, with existing Bridge Erector is greater than the closed girder steel integral hoisting work of across footpath and front end, front beam
It must then be installed after band steel girder erection completion, be constructed using Bridge Erector in the present invention, pacified after avoiding front beam
Additional stress is generated when dress, keeps girder steel bridge completion state identical as design, and reduce high altitude operation, and safer, front beam is in steel
Beam consolidation shed is installed, via hole of Bridge Erector, can lift two width girder steels of left and right simultaneously, and construction speed is fast.
Specifically, as shown in Figures 1 to 3, four front leg struts, 1 system for expanded letter Bridge Erector of the invention, Bridge Erector include
Girder, front leg strut crossbeam 3, front leg strut crossbeam 3 are arranged on girder and can be vertically moved on girder；Four front leg strut systems
System includes four front leg struts 1 arranged side by side, and the top of each front leg strut 1 is hingedly set with front leg strut crossbeam 3 by articulated shaft 9
It sets, the column of each front leg strut 1 can carry out flexible and longitudinal rotation in the height direction, pass through alternately flexible 1 He of front leg strut
The mode longitudinally rotated makes girder steel main longitudinal grider pass through front leg strut 1, and bridge formation function is made successively to set up left and right two width girder steel, thus real
Existing 10 fast hoisting of girder steel.
Preferably, as shown in Figures 1 to 3, the column of each front leg strut 1 includes being equipped with telescopic column core 102 and column sleeve 101
Structure and jacking hydraulic cylinder, the height of front leg strut 1 is adjusted by jacking hydraulic cylinder jacking post core 102；The column of front leg strut 1 passes through
Jacking hydraulic cylinder jacking post core 102 slides realization height in column sleeve 101 and adjusts, and 8 fixed column core of pin shaft is plugged after being adjusted in place
102 with column sleeve 101, make jack hydraulic cylinder be not subjected to load；The top of column sleeve 101 and front leg strut crossbeam 3 are hingedly arranged, rotation
One end of hydraulic cylinder 6 is connect with front leg strut crossbeam 3, and the other end of rotary hydraulic cylinder 6 is connect with the middle and upper part of column sleeve 101 to be set
It sets；When front leg strut 1 carries out longitudinal rotate, reduce front leg strut 1 highly, front leg strut crossbeam 3 is locked with girder, makes to revolve
Turn the elongation of hydraulic cylinder 6, is able to carry out front leg strut 1 and longitudinally rotates.
Hinged about collar 5 moves up, and realizes the spin locking of front leg strut 1, and front leg strut 1 is vertical weight bearing situations at this time；Constraint
It covers hydraulic cylinder 6 to extend, hingedly about collar 5 moves down, and releases 1 spin locking of front leg strut.
Preferably, as shown in Figures 2 and 3, each front leg strut 1 further includes hinged about collar 5 and about collar hydraulic cylinder 6, is cut with scissors
Female connector is set in the outside of column sleeve 101, and hinged about collar 5 can move up and down on column sleeve 101；About collar is hydraulic
6 one end of oil cylinder is installed on hinged about collar 5, and the other end is installed on the outer wall of column sleeve 101, covers hydraulic oil by control constraints
Cylinder 6 locks hinged about collar 5 to the hinge point of front leg strut 1, makes front leg strut 1 not and can be carried out longitudinal rotation.
Preferably, girder is main stressed member, and girder includes multiple girder sections；Adjacent girder section is connected by double pin axle
It connects, the lower part of girder is provided with the long rails vertically moved for front leg strut 1.
Preferably, four front leg struts 1 are the first front leg strut, the second front leg strut, third front leg strut and the 4th front leg strut, four
In pairs, the first front leg strut and the second front leg strut are one group to front leg strut, and the outside of the second front leg strut is arranged in the first front leg strut,
Third front leg strut and the 4th front leg strut are one group, and the setting of the 4th front leg strut is arranged on the outside in third front leg strut.
Preferably, 102 lower part of column core of the column of front leg strut 1 is provided with multiple pin shaft holes, pin shaft hole cloth along the vertical direction
It sets, column core 102 and column sleeve 101 are locked by pin shaft 8, are adjusted requirement to meet the bearing height of front leg strut 1, are made front leg strut
1 jack-up hydraulic ram is not subjected to load.
On the other hand, the present invention also provides a kind of Bridge Erectors, including above-mentioned four front leg struts system.
On the other hand, as shown in figure 4, the present invention also provides a kind of erection method, Bridge Erector includes stringer purlin vehicle 4, fortune
Beam trolley and four above-mentioned foreleg systems, erection method the following steps are included:
Step S1, the right longitudinal traversing work of preparation later in place of width girder steel 2；
Step S2, girder steel 2 is traversing, and at the second front leg strut of inside, the second front leg strut of inside is withdrawn, and girder steel 10 is traversing to outer
At the first front leg strut of side；
Step S3, the second front leg strut of inside are transferred to working condition, and the first front leg strut of outside is withdrawn, and girder steel 10 is laterally moved to refer to
Positioning is set, and stringer splicing operation is completed in the decentralization of girder steel 2 to design height；
Step S4, in place by the longitudinal lifting of left width girder steel 2, at traversing to the corresponding inside third front leg strut of girder steel 2；
Step S5, girder steel 2 it is traversing to corresponding inside third front leg strut at, inside third front leg strut withdraw；
Step S6, girder steel 2 are traversing at the 4th front leg strut of outside；
Step S7, inside third front leg strut are transferred to working condition, and the 4th front leg strut of outside is withdrawn, and steel 2 beams of cross, which move on to, to be set
Position is counted, stringer splicing operation is completed in the decentralization of girder steel 2 to design height.
Preferably, stringer purlin vehicle 4 includes the first stringer purlin vehicle and the second stringer purlin vehicle, and fortune beam trolley includes that the first fortune beam is small
Vehicle and the second fortune beam trolley.
Preferably, in above-mentioned erection method, before " step S1 " further include:
First stringer purlin vehicle, the second stringer purlin vehicle run the preparation before doing good luck fortune beam to the tail portion of Bridge Erector；
First fortune beam trolley and the second fortune beam trolley carry out fortune beam operation, when the preceding suspension centre of beam slab reaches the first stringer purlin vehicle
Underface after, the preceding suspension centre of beam slab is anchored on the suspender of the first stringer purlin vehicle and is promoted specified altitude assignment；
First stringer purlin vehicle and the first beam car cooperation fortune fortune beam, when the after suspension centre of beam slab reaches the second stringer purlin vehicle just
Behind lower section, the rear suspension centre of beam slab is anchored on the suspender of the second stringer purlin vehicle and promoted to specified altitude assignment；
First stringer purlin Che Yunyun beam stops fortune fortune beam when beam slab reaches front designated position.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (9)
1. a kind of four front leg strut systems for Bridge Erector, Bridge Erector includes girder, front leg strut crossbeam, and the setting of front leg strut crossbeam exists
It can be vertically moved on girder and on girder；It is characterized in that, four front leg strut systems include before four arranged side by side
Supporting leg, the top of each front leg strut are hingedly arranged with front leg strut crossbeam, and the column of each front leg strut can be in the height direction
Flexible and longitudinal rotation is carried out, makes girder steel main longitudinal grider across front leg strut by way of alternately flexible front leg strut and longitudinally rotating,
Bridge formation function is set successively to set up left and right two width girder steel, to realize girder steel fast hoisting.
2. the four front leg strut systems according to claim 1 for Bridge Erector, which is characterized in that each front leg strut includes setting
There are telescopic column stem nested structure and jack-up hydraulic ram, the height of front leg strut is adjusted by jacking hydraulic cylinder jacking post core；
Telescopic column slides realization height by the column core that jacking hydraulic cylinder jacks column in column sleeve and adjusts, and plugs pin after being adjusted in place
Axis fixed column core and column sleeve make jacking hydraulic cylinder be not subjected to load；The top of column sleeve is hingedly arranged with front leg strut crossbeam, rotation
One end of hydraulic cylinder is connect with front leg strut crossbeam, and the other end of rotary hydraulic cylinder and the middle and upper part of column sleeve connect and be arranged；
Longitudinal rotation is carried out in front leg strut, first makes the reduction of front leg strut height, front leg strut crossbeam is locked with girder, makes to rotate liquid
Compressing cylinder is able to carry out front leg strut and longitudinally rotates.
3. the four front leg strut systems according to claim 1 for expanded letter Bridge Erector, which is characterized in that each front leg strut is also
Including hingedly about collar and hinged set hydraulic cylinder, hinged set is set in the outside of column sleeve, and hinged set can be enterprising in column sleeve
Row moves up and down；Hinged set hydraulic cylinder one end is installed in hinged constraint and puts on, and the other end is installed on the outer wall of column sleeve, is passed through
Control hinged set hydraulic cylinder locks hinged set to the hinge point of front leg strut, makes front leg strut not and can be carried out longitudinal rotation
Turn.
4. the four front leg strut systems according to claim 1 for Bridge Erector, which is characterized in that girder is main forced section
Part, girder include multiple girder sections；By double-pin axis connection, the lower part of girder is provided with vertical for front leg strut adjacent girder section
To mobile long rails.
5. the four front leg strut systems according to claim 1 for expanded letter Bridge Erector, which is characterized in that four front leg struts are
First front leg strut, the second front leg strut, third front leg strut and the 4th front leg strut, four front leg struts in pairs, the first front leg strut and
Second front leg strut is one group, and the outside of the second front leg strut is arranged in the first front leg strut, and third front leg strut and the 4th front leg strut are one
Group, the setting of the 4th front leg strut are arranged on the outside in third front leg strut.
6. the four front leg strut systems according to claim 1 for Bridge Erector, which is characterized in that the column core of front leg strut column
Lower part is provided with multiple pin shaft holes, and pin shaft hole is arranged in a vertical direction, and column core and column sleeve are locked by pin shaft, before meeting
The bearing height of supporting leg, which is adjusted, to be required, and after pin shaft fixes, the telescopic hydraulic oil cylinder of front leg strut is made to be not subjected to load.
7. a kind of erection method applied to the four foreleg system of Bridge Erector any in the claims 1 to 6, feature exist
In, erection method the following steps are included:
The longitudinal traversing work of preparation later in place of the right width girder steel of step S1.；
Step S2. girder steel is traversing, and at the second front leg strut of inside, the second front leg strut of inside is withdrawn, and girder steel is traversing to before outside first
At supporting leg；
The second front leg strut is transferred to working condition on the inside of step S3., and the first front leg strut of outside is withdrawn, and girder steel is laterally moved to specific bit
It sets, girder steel is transferred to design height, and stringer splicing operation is completed；
Step S4. longitudinally lifts left width girder steel in place, at traversing to the corresponding inside third front leg strut of girder steel；
At traversing to the corresponding inside third front leg strut of step S5. girder steel, inside third front leg strut is withdrawn；
Step S6. girder steel is traversing at the 4th front leg strut of outside；
Third front leg strut is transferred to working condition on the inside of step S7., and the 4th front leg strut of outside is withdrawn, and gooseneck moves on to design position
It sets, girder steel transfers to design height and completes stringer splicing operation.
8. the erection method of the four front leg strut systems according to claim 7 for expanded letter Bridge Erector, which is characterized in that vertical
Row purlin vehicle includes the first stringer purlin vehicle and the second stringer purlin vehicle, and fortune beam trolley includes the first fortune beam trolley and the second fortune beam trolley.
9. the erection method of the four front leg strut systems according to claim 7 for expanded letter Bridge Erector, which is characterized in that
Before " step S1 " further include:
First stringer purlin vehicle, the second stringer purlin vehicle run the preparation before doing good luck beam to the tail portion of Bridge Erector；
First fortune beam trolley and the second fortune beam trolley carry out fortune beam operation, when the preceding suspension centre of girder steel reaches the first stringer purlin vehicle just
Behind lower section, the preceding suspension centre of girder steel is anchored on the suspender of the first stringer purlin vehicle and is promoted specified altitude assignment；
First stringer purlin vehicle and the first beam car cooperation fortune beam, when the after suspension centre of girder steel reaches the underface of the second stringer purlin vehicle
Afterwards, the rear suspension centre of girder steel is anchored on the suspender of the second stringer purlin vehicle and promoted to specified altitude assignment；
First stringer purlin Che Yunliang stops fortune beam when girder steel reaches front designated position.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113265957A (en) * | 2021-05-11 | 2021-08-17 | 中铁二局集团有限公司 | Swivel hoisting method for I-shaped steel beam |
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