CN107476195A - A kind of suspension bridge transports the fortune beam tackle system of stiff girder - Google Patents
A kind of suspension bridge transports the fortune beam tackle system of stiff girder Download PDFInfo
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- CN107476195A CN107476195A CN201710702095.5A CN201710702095A CN107476195A CN 107476195 A CN107476195 A CN 107476195A CN 201710702095 A CN201710702095 A CN 201710702095A CN 107476195 A CN107476195 A CN 107476195A
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- fortune beam
- outrigger
- suspension bridge
- rope
- stiff girder
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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
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses the fortune beam tackle system that a kind of suspension bridge transports stiff girder, including one group of both ends that some outriggers are hooked on along suspension bridge direction into horizontally arranged outrigger, by longeron being suspended on by hoist cable on main push-towing rope and outside stretching sling of suspension bridge face to be pulled in the fortune beam coaster into groove structure moved on outrigger by reciprocating-type tractor system.The characteristics of present invention economical good, large carrying capacity, transport capacity can be more than 400 tons, and traveling more smoothes out.
Description
Technical field
The invention belongs to suspension bridge construction equipment, and in particular to a kind of suspension bridge transports the fortune beam tackle system of stiff girder.
Background technology
At present, the known common method across the whole section steel truss stiff girder of the suspension bridge shoal position of rivers erection has stack
Bridge method, the method rail rope sliding method of whole section steel truss stiff girder is set up in the suspension bridge gamut across valley, and cable is carried and hung
The problem that machine load walking need to capture is also very big.Trestle method needs 2 rows to support stake and 2 rows to bear stiff girder and slide in the above
Beam, very big needed for steel and equipment, if meeting the high situation of riverbed basement rock intensity, the installation for supporting stake is difficult processing.Rail rope
Sliding method can effectively solve the problem that the installation question of 2 kinds of bridge type stiff girders of the above, but rail rope and its anchoring are costly, and stiff girder section
When section is heavier, beam car dipping and heaving is bigger.
The content of the invention
It is an object of the invention to provide the fortune beam cunning that the suspension bridge of a kind of good economy performance, large carrying capacity transports stiff girder
Car system.
Realize that the technical scheme that the object of the invention uses is as follows：
Suspension bridge provided by the invention transports the fortune beam tackle system of stiff girder, including one group be suspended on by hoist cable on main push-towing rope and
The both ends that some outriggers are hooked on along suspension bridge direction into horizontally arranged outrigger, by longeron stretched out outside sling of suspension bridge face
Portion is pulled in the fortune beam coaster into groove structure moved on outrigger by reciprocating-type tractor system.
The outrigger is fixed by a set of steel wire rope fixed system, and the both ends of outrigger are provided with plain-barreled roll device, the fortune beam
Coaster is supported on by its longeron on the plain-barreled roll device of 2~3 outrigger ends.
The steel wire rope fixed system includes connecting the upper edge of the outrigger end and guide line and the positioning of lower edge respectively
Rope, the end of the guide line are fixed on main push-towing rope by anchoringwire folder, and guide line is provided with guide line turning point gusset plate, leads
It is suspended in rope balancing weight on guide line turning point gusset plate；The end of the positioning rope is fixed on main push-towing rope by anchoringwire folder
On, positioning rope is provided with positioning rope turning point gusset plate, and positioning rope balancing weight is suspended on positioning rope turning point gusset plate.
The longeron bottom of the fortune beam coaster is provided with vertical roller bearing pair and is engaged with the guide line so that fortune beam is slided
Car moves under the guiding of guide line on outrigger.
The fortune beam coaster includes " C " shape hook truss of both sides, connects the tie-beam of two " C " shape hook truss bottoms, described
Longeron is connected with the top of each " C " shape hook truss, and the inner side of longeron is provided with main truss piece, and fortune beam coaster passes through main truss piece hook
Hang on the plain-barreled roll device of outrigger end.
The front and back end lower edge of the longeron is fabricated to the arc upwarped.
Beneficial effect
1st, transporting beam coaster, the mobile transport on outrigger is put more energy into girder segment by longeron, transports equivalent to one section movement of longeron of beam coaster
Track girder, have the plain-barreled roll device supporting on 2~3 pairs of outrigger both ends below longeron all the time, whole need not be laid using this mode
Track and erection crossbeam, fortune beam coaster need not climb during travelling, it is not necessary to powerful power, save the energy.
2nd, outrigger is used as supporter by the use of permanent hoist cable, it is not necessary to which other expend the support of huge supporting member such as trestle
Stake, hoist cable is tensile member, the problem of in the absence of strut buckling, is taken root on main push-towing rope, saving expense, stably, reliably.
3rd, outrigger both ends are stretched out outside hoist cable face, and plain-barreled roll device is placed on it, and special close to hoist cable, the mechanics of such outrigger
Property be that shearing is big, moment of flexure is small, it is only necessary in outrigger and hoist cable junction（That is both ends）The strong short beam of shear resistance is made, in outrigger
This conventional repeatable approved product connection both ends short beam utilized of middle part Bailey bracket, because moment of flexure is small, Bailey bracket dosage
It is few, and the crossbeam that trestle is used to lay track then needs a large amount of Bailey brackets.
The present invention sets up stiff girder using the above method and equipment, the characteristics of economical good, large carrying capacity, transport
Ability can be more than 400 tons, and traveling smoothes out very much, can all implement across valley, across the suspension bridges of rivers.
Technical scheme is further illustrated below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the schematic diagram in interim hoisting point position lifting stiff girder.
Fig. 2 is that stiff girder is placed on to the supratrochlear schematic diagram of fortune beam driven into.
Fig. 3 is to transport beam coaster to transport stiff girder to the schematic diagram of assembled position.
Fig. 4 is partial enlarged drawing at A in Fig. 3.
Fig. 5 is that deck unit erection gantry slings stiff girder and removes the schematic diagram of fortune beam coaster.
Fig. 6 is partial enlarged drawing at B in Fig. 5.
Fig. 7 is mounted in outrigger, fixed system, the schematic diagram of trailer system near bridge tower.
Fig. 8 is the schematic diagram of guide line in reciprocating-type tractor system and steel wire rope fixed system.
Fig. 9 is the schematic diagram for positioning rope in the present invention in steel wire rope fixed system.
Figure 10 is the schematic diagram of the remaining outrigger of installation after installation fortune beam coaster.
Figure 11 is the structural representation for transporting beam coaster.
Figure 12 is partial enlarged drawing at C in Figure 11.
Figure 13 is to transport the schematic diagram that beam coaster is oriented to.
In figure, 1. outriggers, 101. ends, 102. outrigger tie-beams, 2. plain-barreled roll devices, 3. anchoring cord clips, 4.
Guide line, 5. positioning ropes, 6. guide line steering node plates, 7. positioning rope steering node plates, 8. guide line balancing weights, 9.
Position rope balancing weight, 10. fortune beam coasters, 1001. " C " shape hook truss, 1002. longerons, 1003. longeron main truss pieces, 1004.
Tie-beam, 11. pull ropes, 12. fixed pulleys, 13. deck unit erection gantries, 1301. pull system, 1302. interim cord clips, 14. plus
Strength beam tackling system, 1401. interim cord clips, 1402. steel wire ropes, 1403. haulage cables, 1404. assembly pulleys, 1405.
Shoulder pole girder, 1406. hoisting wireropes, 15. main push-towing ropes, 16. hoist cables, 17. stiff girders, 18. bridge towers, 19. roller bearings, a. fortune
Beam ship.
Embodiment
As shown in figure 1, the fortune beam tackle system that the suspension bridge of the present invention transports stiff girder includes being fixed on two main push-towing ropes 15
The hoist cable 16 in sling of suspension bridge face is respectively constituted, one group is suspended on hoist cable 16 and outside the stretching sling of suspension bridge face of both ends temporarily
The outrigger 1 that is arranged along suspension bridge direction into horizontal parallel, some choose be hooked on by the longeron 1002 set along suspension bridge direction
The both ends 101 of beam 1 are pulled in the fortune beam coaster 10 into groove structure moved forward and backward on outrigger 1 by reciprocating-type tractor system.
As Figure 1 and Figure 4, the outrigger 1 is connected by the end 101 of two truss structures and the outrigger at connection both ends 101
Connect beam 102 to be combined into, the end 101 of outrigger 1 is welded by shaped steel, and length is short, and middle outrigger tie-beam 102 is spliced by Bailey bracket
Into, account for outrigger 1 composition major part；The both ends 101 of outrigger 1 are equipped with plain-barreled roll device 2, and the installation site of plain-barreled roll device 2 is leaned on
Nearly hoist cable 16（Supporting-point）, reduce stiff girder 17 to greatest extent and transport the gravity of beam coaster 10 to moment of flexure caused by outrigger 1,
The bending resistance that so outrigger 1 need not be stronger, while the end 101 of outrigger 1 is welded by stronger form steel, can effectively bear lotus
Carry, and the end 101 of outrigger only accounts for the very little part of outrigger 1, above structure is for reducing the material usages of numerous outriggers 1 to closing weight
Will, Bailey bracket belongs to the approved product that bending resistance is strong, shear resistance is relatively weak, is well suited for largely reusing, avoid compared with
More disposable inputs；Outrigger 1 is fixed by a set of steel wire rope fixed system and hung from above in the anchoring cord clip 3 on main push-towing rope 15
On, the steel wire rope fixed system, as shown in Fig. 1, Fig. 6, Fig. 8, Fig. 9, including the anchor for being installed on two main push-towing ropes 15 is anchored at respectively
Gu two groups of guide lines 4 and positioning rope 5 on cord clip 3, every group of guide line 4 and positioning rope 5 connect an end on all outriggers 1 respectively
The upper edge in portion 101 and lower edge, guide line steering node is installed respectively on the guide line 4 and positioning rope 5 of anchoring cord clip 3 obliquely downward
Plate 6 and positioning rope steering node plate 7, distinguish hanging container formula on guide line steering node plate 6 and positioning rope steering node plate 7
Guide line balancing weight 8 and positioning rope balancing weight 9, toward balancing weight in the securable guide line 4 of water filling and position rope 5,3 times can be produced
The Horizontal Tension of balancing weight weight, with each row's outrigger 1 of fixation, the effect of steel wire rope fixed system is to prevent outrigger 1 from toppling, shaking
Dynamic and resistance fortune beam coaster 10 impact；
As shown in Fig. 1, Figure 11, Figure 12, overall fortune beam coaster 10 is in that upward aperture efficiency stiff girder 17 is wide into groove structure, fortune
Stiff girder 17 in beam coaster 10 can up be lifted with accessible；Transporting beam coaster 10 includes " C " shape hook truss 1001 of both sides, connects
The tie-beam 1004 of the bottom of two " C " shape hook truss 1001 is connect, the top of the longeron 1002 and each " C " shape hook truss 1001 connects
Integrally, the inner side of longeron 1002 is provided with main truss piece 1003, and fortune beam coaster 10 is hooked on the end of outrigger 1 by main truss piece 1003
On 101 plain-barreled roll device 2, the longeron 1002 of fortune beam coaster 10 crosses over 2 beam section sections of stiff girder 17, and fortune beam coaster 10 is by vertical
Beam 1002 is supported by 2~3 pairs of plain-barreled roll devices 2 all the time when being slided on plain-barreled roll device 2, need not whole laid rail using this mode
Road and erection crossbeam；Fortune beam coaster longeron main truss piece 1003 belongs to rigid track, is not run over like flexible rail rope, fortune beam coaster 10
It need not climb in journey, rise and fall small, it is not necessary to powerful traction power, save the energy, combine rigid track and flexible rail
The advantages of；The tie-beam 1004 of the lower end of " C " shape hook truss 1001 of connection fortune beam coaster both sides is spliced into using Bailey bracket, because
" C " shape hook 1001 shear resistances of truss are strong, and the gravity of stiff girder 17 is mainly applied to the bottom of " C " shape hook truss 1001 of fortune beam coaster
Portion, Bailey bracket are not subject to big load；The front and back end lower edge of longeron 1002 is fabricated to the arc upwarped, because hoist cable 16 is grown,
A small amount of elongation is had under load action, fortune beam coaster 10 can sink, the arc of the front and back end of fortune beam coaster longeron 1002
Shape section can be such that fortune beam coaster 10 smoothly transits on plain-barreled roll device 2.
As shown in Fig. 1, Fig. 6, Fig. 8, the reciprocating-type tractor system that traction fortune beam coaster 10 moves forward and backward includes filling with traction
The pull rope 11 and fixed pulley 12 of connection are put, fixed pulley 12 is placed on guide line steering node plate 6, and pull rope 11 is around fixed sliding
Wheel 12 is rotarily formed closed loop, and draw-gear driving pull rope 11 can make fortune beam coaster 10 back and forth in 17 interim hoisting point position of stiff girder
Between 17 assembled position of stiff girder.Because the tractive force that traction fortune beam coaster 10 is put on pull rope 11 is less than guide line 4
Tensile force, the fixed pulley 12 for steering is arranged, and effectively make use of existing construction equipment.
As shown in Fig. 1, Fig. 6, Figure 10, Figure 13, guide line 4 also acts as the effect being oriented to fortune beam coaster 10.Slided in fortune beam
The bottom of longeron 1002 of car is provided with 3 pairs of vertical roller bearings 19, and guide line 4 passes through among each pair roller bearing 19（Referring to Figure 13）,
Guide line 4 after tensioning can form certain rigidity, and fortune beam coaster 10 will be oriented to by guide line 4 when travelling, and especially be filled in plain-barreled roll
2 near zones are put, the rigidity of guide line 4 is bigger, and fortune beam coaster 10 can be directed past plain-barreled roll device 2 well.
The present invention is used for the transport and assembly of stiffening girder of suspension bridge, as shown in Figure 1, Figure 7 shows, should also be in main push-towing rope 15 during construction
Upper suspension stiff girder tackling system 14, and installation can be moved along main push-towing rope 15 for lifting and transporting stiff girder to spelling on main push-towing rope 15
The deck unit erection gantry 13 of holding position.The stiff girder tackling system 14 includes the steel being fixed on by interim cord clip 1401 on main push-towing rope 15
Cord 1402, the top sheave group 1404 being connected with steel wire rope 1402, it is connected with top sheave group 1404 by haulage cable 1403
Lower sheave group 1404 ', the shoulder pole girder 1405, the hoisting wirerope that is located on shoulder pole girder 1405 that are connected with lower sheave group 1404 '
1406, haulage cable 601 is connected with the hoist engine at the top of bridge tower 18；The deck unit erection gantry 13 is by interim cord clip 1302 and drags
Pull system 1301 is fixed on main push-towing rope 3.Deck unit erection gantry 13 uses approved product, its act on be lifting fortune beam coaster 8 it is shipping plus
Strength girder segment 1, in order to which this section is installed.
For installation process of the present invention as shown in Fig. 1, Fig. 7-Figure 10, most of outrigger 1 can be transported to peace with fortune beam coaster 10
Holding position is installed, and first installs 3 groups of outriggers 1 at bridge tower 18, then installs the fixed system of outrigger 1：Anchor cord clip 3, guide line
Steering node plate 6 and positioning rope steering node plate 7, guide line 4 and positioning rope 5, guide line balancing weight 8 and positioning rope balancing weight 9,
Balancing weight is the water tank surrounded with steel plate, now only pours into 1/2 water, and installation fortune beam coaster 10 is installed by bridge tower 18
The pull rope 11 of good luck beam coaster 10, the 4th group of outrigger 1 is hung over into the front end of fortune beam coaster 10, driving transports beam coaster 10 towards span centre row
Sail, to the position of the 4th row's hoist cable 16, the 4th group of outrigger 1 is arranged on the 4th row's hoist cable 16, and so on, installs all outriggers
1, adjust the position of all outriggers 1, toward guide line balancing weight 8 and positioning rope balancing weight 9 in pour into remaining 1/2 water, it is complete
Into the tensioning of guide line 4, positioning rope 5, all outriggers 1 and guide line 4, positioning rope 5 are fastened.
The present invention is used to transport and assembly is put more energy into, and beam method is as follows：
First, as shown in figure 1, in the place that shoal outward transport beam ship a can drive into, interim suspension centre is set, lifts by crane and puts more energy into from ship a
Beam 17, the position for being set to closure segment is set up herein, and for the suspension bridge across valley, typically transport stiff girder from end of the bridge toward span centre
17；Some outriggers 1 arranged into horizontal parallel are hung by hoist cable 16 temporarily along stiff girder assembly direction on main push-towing rope 15, fortune beam is slided
Car 10 is hooked on outrigger 1 by the both ends 101 of longeron 1002 using some outriggers 1 as support, and being set on main push-towing rope 15 can edge
The deck unit erection gantry 13 that main push-towing rope 15 moves, while anchoring temporarily stiff girder tackling system 14 on the main push-towing rope 15 above interim suspension centre.
2nd, as shown in Figure 1 and Figure 2, the stiff girder 17 at interim suspension centre is lifted by crane by stiff girder tackling system 14；During lifting,
Hoisting wirerope 1406 on shoulder pole girder 1405 fixes stiff girder 17, and hoist engine drives haulage cable 1403 to lift lower sheave
Group 1404 ' and shoulder pole girder 1405, after stiff girder 17 is lifted into the height of fortune beam coaster 10 from ship a, fortune beam coaster 8 is past
The position of stiff girder 17 is driven under the traction of compound trailer system pull rope 11, transfers stiff girder 17, is fallen within fortune beam coaster
In 10.
3rd, as shown in Fig. 3, Fig. 5, stiff girder 17 is transported to assembled position by mobile fortune beam coaster 10 from interim hoisting point position
Put, accepted by deck unit erection gantry 13 and sling about 10cm below stiff girder 17 to installation site, fortune beam coaster 10 is removed, by this section
Outrigger 1 disassembled from hoist cable 16, fall on stiff girder 17, again lifted stiff girder 17, by the stiff girder 17 with dismounting
Hoist cable 16 after outrigger 1 is connected, then stiff girder 17 and the stiff girder set up are carried out into assembly, will by pulling system 1301
Deck unit erection gantry 13 is moved to the assembled position waiting of next beam section；
4th, repeat step two, three, one by one assembled complete stiff girder 17.
The inventive method good economy performance, strong adaptability, fortune beam process safety, steady, quick, sling length near bridge tower
Greatly, elongation is maximum, but is at most also no more than 10cm, i.e., fortune beam coaster is transporting the mesorelief of beam process not over 10cm, be compared with
Smoothly, be advantageous to improve fortune beam speed.The present invention is suitable for that stiff girder can not be transported to what vertical lifting under bridge was installed
Situation, such as the suspension bridge shoal position across rivers, across valley suspension bridge.
Claims (7)
1. a kind of suspension bridge transports the fortune beam tackle system of stiff girder, it is characterized in that being suspended on including one group by hoist cable on main push-towing rope
And stretch out outside sling of suspension bridge face along suspension bridge direction into horizontally arranged outrigger, the two of some outriggers are hooked on by longeron
End is pulled in the fortune beam coaster into groove structure moved on outrigger by reciprocating-type tractor system.
2. suspension bridge according to claim 1 transports the fortune beam tackle system of stiff girder, it is characterized in that the outrigger passes through
A set of steel wire rope fixed system is fixed, and the both ends of outrigger are provided with plain-barreled roll device, and the fortune beam coaster is supported on 2 by its longeron
On the plain-barreled roll device of~3 outrigger ends.
3. suspension bridge according to claim 2 transports the fortune beam tackle system of stiff girder, it is characterized in that the steel wire rope is consolidated
Determining system includes connecting the upper edge of the outrigger end and the guide line of lower edge and positioning rope respectively, and the end of the guide line leads to
Cross anchoringwire folder to be fixed on main push-towing rope, guide line is provided with guide line turning point gusset plate, and guide line balancing weight is suspended in guiding
On rope turning point gusset plate；The end of the positioning rope is fixed on main push-towing rope by anchoringwire folder, and positioning rope is provided with positioning rope
Turning point gusset plate, positioning rope balancing weight are suspended on positioning rope turning point gusset plate.
4. suspension bridge according to claim 3 transports the fortune beam tackle system of stiff girder, it is characterized in that the stiff girder rises
Crane system includes passing through the assembly pulley of interim cord clip and steel wire hang on main push-towing rope, and assembly pulley passes through shoulder pole girder and lifting steel wire
Rope lifting stiff girder, the haulage cable of hauling block group are connected with the hoist engine on bridge tower top.
5. suspension bridge according to claim 4 transports the fortune beam tackle system of stiff girder, it is characterized in that the fortune beam coaster
Longeron bottom be provided with vertical roller bearing pair and be engaged with the guide line so that fortune beam coaster under the guiding of guide line
Moved on outrigger.
6. suspension bridge transports the fortune beam tackle system of stiff girder according to claim 1 or 5, it is characterized in that the fortune beam is slided
Car includes " C " shape hook truss of both sides, connects the tie-beam of two " C " shape hook truss bottoms, the longeron and each " C " shape hook purlin
The top of frame is connected, and the inner side of longeron is provided with main truss piece, and fortune beam coaster is hooked on the plain-barreled roll of outrigger end by main truss piece
On device.
7. suspension bridge according to claim 6 transports the fortune beam tackle system of stiff girder, it is characterized in that the longeron
Front and back end lower edge be fabricated to the arc upwarped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702095.5A CN107476195B (en) | 2017-08-16 | 2017-08-16 | Girder transporting pulley system for transporting stiffening girder by suspension bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702095.5A CN107476195B (en) | 2017-08-16 | 2017-08-16 | Girder transporting pulley system for transporting stiffening girder by suspension bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107476195A true CN107476195A (en) | 2017-12-15 |
| CN107476195B CN107476195B (en) | 2023-04-07 |
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ID=60600497
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710702095.5A Active CN107476195B (en) | 2017-08-16 | 2017-08-16 | Girder transporting pulley system for transporting stiffening girder by suspension bridge |
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| CN (1) | CN107476195B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625275A (en) * | 2018-05-09 | 2018-10-09 | 中交第公路工程局有限公司 | A kind of stiffening girder of suspension bridge section installation method |
| CN109137759A (en) * | 2018-09-29 | 2019-01-04 | 中铁第四勘察设计院集团有限公司 | A kind of prestressed concrete box girder precast segment cantilever assembling method and system |
| CN110844801A (en) * | 2019-11-12 | 2020-02-28 | 湖南路桥建设集团有限责任公司 | Split type cable carrying crane for erecting main beam of suspension bridge |
| CN111691305A (en) * | 2020-06-11 | 2020-09-22 | 中交二公局第二工程有限公司 | Method for installing main beam of suspension bridge |
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| CN105484162A (en) * | 2015-12-15 | 2016-04-13 | 中交一公局第三工程有限公司 | Device and method for secondary swing and shift of onshore stiffening beams for construction of suspension bridge |
| CN207227964U (en) * | 2017-08-16 | 2018-04-13 | 湖南路桥建设集团有限责任公司 | A kind of suspension bridge transports the fortune beam tackle system of stiff girder |
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| CN200967927Y (en) * | 2006-10-27 | 2007-10-31 | 湖南省交通厅 | Rope-suspension bridge multi-span ropeway girder conveyer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625275A (en) * | 2018-05-09 | 2018-10-09 | 中交第公路工程局有限公司 | A kind of stiffening girder of suspension bridge section installation method |
| CN109137759A (en) * | 2018-09-29 | 2019-01-04 | 中铁第四勘察设计院集团有限公司 | A kind of prestressed concrete box girder precast segment cantilever assembling method and system |
| CN109137759B (en) * | 2018-09-29 | 2023-12-19 | 中铁第四勘察设计院集团有限公司 | Precast cantilever assembling method and system for prestressed concrete box girder segment |
| CN110844801A (en) * | 2019-11-12 | 2020-02-28 | 湖南路桥建设集团有限责任公司 | Split type cable carrying crane for erecting main beam of suspension bridge |
| CN110844801B (en) * | 2019-11-12 | 2020-12-18 | 湖南路桥建设集团有限责任公司 | Split type cable carrying crane for erecting main beam of suspension bridge |
| CN111691305A (en) * | 2020-06-11 | 2020-09-22 | 中交二公局第二工程有限公司 | Method for installing main beam of suspension bridge |
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| CN107476195B (en) | 2023-04-07 |
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