CN108411795B - An a kind of Curved Continuous Beams Hanging Basket fast fallback method over long distances - Google Patents
An a kind of Curved Continuous Beams Hanging Basket fast fallback method over long distances Download PDFInfo
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- CN108411795B CN108411795B CN201810220215.2A CN201810220215A CN108411795B CN 108411795 B CN108411795 B CN 108411795B CN 201810220215 A CN201810220215 A CN 201810220215A CN 108411795 B CN108411795 B CN 108411795B
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- hanging basket
- rollback
- basket
- over long
- long distances
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
Abstract
The invention discloses a kind of Curved Continuous Beams Hanging Basket fast fallback methods over long distances, include the following steps: that S1 Hanging Basket rollback pre-structure is reinforced；S2 Hanging Basket bottom basket and template fall and fix；Hanging Basket rollback line adjustment fixed pulley is arranged in S3, arranges class curved path walking track and installation pulling equipment；S4 removes Hanging Basket after so that Hanging Basket is retracted to outside existing safety line using pulling equipment.The Curved Continuous Beams Hanging Basket of a structure fast fallback method over long distances, it is ensured that the fast and stable of Hanging Basket back off procedure, securely and reliably, meanwhile, reduce Hanging Basket in the traveling offset distance of curve beam body cross-sectional direction, in addition, also having effects of energy saving and emission reduction.
Description
Technical field
The present invention relates to Construction of continuous beam technical fields, and in particular to a kind of Curved Continuous Beams Hanging Basket is primary quick over long distances
Backing method.
Background technique
Hanging Basket rollback is the construction technology for being frequently necessary to encounter in Construction of continuous beam, is needed in recent years disposable quick over long distances
The case where moving back Hanging Basket is a lot of in engineering, and how the speed of Hanging Basket is moved back in quickening at double, reduces security risk, and it is few etc. to retreat the used time
It is everybody problem in the urgent need to address.Such as: it is 75+125 by Xiang Tan grand bridge 214#-217# continuous beam that my company undertakes the construction of
+ 75m rotator construction continuous beam, being located at sweep is 1200m, in the curve location of vector distance 26cm, and on across Shanghai elder brother's railway, Hunan
The station tracks such as steel industrial siding 5, are most one of the swivel continuous beams in across the railway station track in China.Swivel continuous beam is poured using Hanging Basket cantilever
Note, finally across closing up in swivel.After closing up for general building site beam, it can remove to unload in situ and hang, however, at this both wired upper
Have for Hanging Basket to return back to other than safe-guard line and just can be carried out dismounting work.Discovery is checked at scene, Hanging Basket need from 216# pier across
Middle position retreats to the segment 2#, to after outside existing railway coverage, just can be carried out dismounting, meanwhile, be limited by it is busy both
There is the influence of Shanghai elder brother's transportation route, not only traffic safety risk is high, but also the construction time that can be given is extremely limited, it is necessary to short-term
Interior disposable rollback is in place.Through network retrieval and market survey, had no on camber beam at home across busy transport multiply road length
Construction precedent apart from fast fallback Hanging Basket.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of Curved Continuous Beams Hanging Basket fast fallback method over long distances,
To ensure Hanging Basket back off procedure fast and stable, securely and reliably, meanwhile, Hanging Basket is reduced in the traveling of curve beam body cross-sectional direction
Offset distance, in addition, also having effects of energy saving and emission reduction.
The present invention is solved the above problems by following technological means: a kind of Curved Continuous Beams Hanging Basket is primary over long distances quickly to return
Annealing method includes the following steps:
S1 Hanging Basket rollback pre-structure is reinforced: increase vertical supporting steel member and longitudinal nose girder under main couple, by Hanging Basket by
Power system is converted into freely supported structure and is examined to calculate Hanging Basket reinforcement system by cantilever design, guarantees the stabilization that entire Hanging Basket system moves back
Row；
S2 Hanging Basket bottom basket and template fall and fix: as needed, by Hanging Basket bottom basket and template system whereabouts suitable distance,
After the completion of Hanging Basket bottom basket and template system fall, using chain block, sunpender or wirerope by side form and bed die system with hanging
Basket lower and upper cross-member, which is connected and fixed, forms an entirety；
Hanging Basket rollback line adjustment fixed pulley is arranged in S3, arranges class curved path walking track and installation pulling equipment；
S4 removes Hanging Basket after so that Hanging Basket is retracted to outside existing safety line using pulling equipment.
Further, it in step S3, is adjusted using method in vector distance point and determines fixed pulley spacing.
Further, the detailed process for determining fixed pulley spacing is adjusted using method in vector distance point are as follows: retracting according to Hanging Basket
The offset distance of Cheng Zhongliang cross-sectional direction is less than the minimum safe distance between Hanging Basket and beam body flange plate, and is considering security risk
And in the case where taking satisfactory after correcting to delay and move back the Hanging Basket time, between the practical rollback route of setting Hanging Basket and theoretical rollback route
Safe difference, i.e., safe vector distance, be laid with for adjusting the linear fixed pulley of dilatory steel strand wires, between determining between fixed pulley
Away from calculating the vector distance between the practical rollback route of Hanging Basket and theoretical rollback route, the vector distance made to be less than safe vector distance.
Further, in step S3, pulling equipment includes drawing jack, steel strand wires and automatic continuous jacking pumping plant, described
Dilatory jack is fixedly mounted by counter-force seat.
Further, in step S4, the detailed process of Hanging Basket rollback is made using pulling equipment are as follows: Hanging Basket is mobile by two fulcrums
If dilatory jack is dilatory.
Further, more dilatory jack of fulcrum arranged in series are each drawn.
Further, in step S1, after anchor point unclamps after Hanging Basket, using cradle structure fulcrum is increased, increase stable structure.
Beneficial effects of the present invention:
1) technical application bridge prestress tensioning equipment theory of mechanics is laid with logical on the whole route that Hanging Basket retracts
Long walking rails, using jack, steel hinge line and pushing tow pumping plant, one-time continuous stretches rollback Hanging Basket, improves Hanging Basket rollback
Rate.
2) by increasing by two Pin main couple longitudinal direction of Hanging Basket cantilever end, vertical connecting rod and support construction, make Hanging Basket center of gravity
It moves back, becomes rock-steady structure after releasing anchoring, ensure that the stability that Hanging Basket retreats.
3) technology determines adjustment pulley room away from adjusting traction steel strand wires by fixed pulley is song using method in vector distance point
Line, to reduce Hanging Basket in the traveling offset distance of curve beam body cross-sectional direction, to be hung when guaranteeing that Hanging Basket retracts in curve beam section
The safety of extension system, the rapidity of rollback.
4) technology changes conventional separate unit jack pushing tow mode, using the 2 jack series connection of unilateral single steel strand
Automatic continuous jacking, the synchronous push of 2 steel strand wires, 4 jack, greatly accelerates Hanging Basket rollback speed, greatly reduces
To the existing influence across railway transportation efficiency, the risk to both wired traffic safeties is reduced.
5) this technique reduces the use durations of plant, and material therefor and equipment are that bridge construction scene is normal
See material and facility, can gather materials on the spot, has the effect of in energy-saving and emission-reduction certain.
Specific embodiment
Below with reference to embodiment, the present invention is described in detail, and the present invention provides a kind of Curved Continuous Beams Hanging Basket is long
Fast fallback method of distance, includes the following steps:
S1 Hanging Basket rollback pre-structure is reinforced: increase vertical supporting steel member and longitudinal nose girder under main couple, by Hanging Basket by
Power system is converted into freely supported structure and is examined to calculate Hanging Basket reinforcement system by cantilever design, guarantees the stabilization that entire Hanging Basket system moves back
It goes, after anchor point unclamps after Hanging Basket, using cradle structure fulcrum is increased, increases stable structure；By increasing by two Pin of Hanging Basket cantilever end
Main couple longitudinal direction, vertical connecting rod and support construction, move back Hanging Basket center of gravity, become rock-steady structure after releasing anchoring, guarantee
The stability that Hanging Basket retreats.
S2 Hanging Basket bottom basket and template fall and fix: as needed, by Hanging Basket bottom basket and template system whereabouts suitable distance,
After the completion of Hanging Basket bottom basket and template system fall, using chain block, sunpender or wirerope by side form and bed die system with hanging
Basket lower and upper cross-member, which is connected and fixed, forms an entirety；
Hanging Basket rollback line adjustment fixed pulley is arranged in S3, arranges class curved path walking track and installation pulling equipment；It adopts
It is adjusted with method in vector distance point and determines fixed pulley spacing, detailed process are as follows: according to Hanging Basket in back off procedure central sill cross-sectional direction
Offset distance be less than minimum safe distance between Hanging Basket and beam body flange plate, and considering security risk and taking satisfactory after correcting
Delay in the case where moving back the Hanging Basket time, the safe difference between the practical rollback route of setting Hanging Basket and theoretical rollback route is pacified
Full vector distance is laid with for adjusting the linear fixed pulley of dilatory steel strand wires, determines the spacing between fixed pulley, calculate Hanging Basket practical time
The vector distance between route and theoretical rollback route is moved back, the vector distance is made to be less than safe vector distance；Pulling equipment includes dilatory jack, steel
Twisted wire and automatic continuous jacking pumping plant, the dilatory jack are fixedly mounted by counter-force seat.It is determined and is adjusted using method in vector distance point
Whole pulley room is away from adjusting traction steel strand wires by fixed pulley is curve, to reduce Hanging Basket in curve beam body cross-sectional direction
Traveling offset distance, thus when guaranteeing that Hanging Basket retracts in curve beam section, the safety of hangar system, the rapidity of rollback.
S4 removes Hanging Basket after so that Hanging Basket is retracted to outside existing safety line using pulling equipment.Specifically, Hanging Basket it is mobile by
Two fulcrums set dilatory jack and draw, each dilatory more dilatory jack of fulcrum arranged in series.In the whole process that Hanging Basket retracts
Elongated walking rails are laid on route, using jack, steel hinge line and pushing tow pumping plant, one-time continuous stretches rollback Hanging Basket, improves
The rate that Hanging Basket retracts.In addition, conventional separate unit jack pushing tow mode is changed, it is very heavy using unilateral single steel strand 2
Top series connection automatic continuous jacking, the synchronous push of 2 steel strand wires, 4 jack greatly accelerate Hanging Basket rollback speed, greatly
Reduce the risk reduced to the existing influence across railway transportation efficiency to both wired traffic safeties.
To keep above-mentioned technical proposal clearer, Hanging Basket on the grand bridge 214#-217# continuous beam of Xiang Tan is described in detail below
Back off procedure.
Xiang Tan grand bridge 214#-217# continuous beam is 75+125+75m rotator construction continuous beam, is positioned at sweep
1200m, in the curve location of vector distance 26cm, and on the station tracks such as across Shanghai elder brother's railway, Hunan steel industrial siding 5, be across the railway station track in China
One of most swivel continuous beam, using Hanging Basket free cantilever casting, finally in swivel across closing up.After closing up for general building site beam,
It can remove to unload in situ and hang, only returning back to Hanging Basket other than safe-guard line just on both wired can be carried out dismounting work.It is existing
Discovery is checked in field, and Hanging Basket needs are retreated from 216# pier span centre position to from the segment 2#, after outside existing railway coverage, ability
It is removed, meanwhile, being limited by busy existing Shanghai elder brother transportation route influences, and not only traffic safety risk is high, but also can give
The construction time given is extremely limited, it is necessary to disposable in a short time to retract in place.
Hanging Basket is Diamond-Shape Form Traveler, and diamond shape purlin piece is made of the square-section rod piece that the common hot-rolled steel channel of 40b forms, front beam
It is made of I 56b I-steel, basket forward and backward crossbeam in bottom is made of I 40b I-steel, and sunpender pricks screw-thread steel using the essence of Φ 32.It hangs
Before basket retracts, progress structural strengthening specifically increases vertical supporting steel member and longitudinal direction under the piece of two sides diamond shape purlin first
Hanging Basket stress system is converted into freely supported structure by cantilever design and examines calculation reinforcing Hanging Basket system, guarantees entire Hanging Basket system by nose girder
The stabilization row that system moves back.After closure segment pours completion demoulding, scene using chain block, sunpender etc. by side form and bed die system with
Diamond-Shape Form Traveler lower and upper cross-member, which is connected and fixed, forms an entirety.After Hanging Basket releases anchor system before retreating, the lotuses such as lower part template
It carries and is all transmitted on overhanging upper beam by screw-thread steel, need to examine and count whether the force-bearing situations such as portion's main couple, crossbeam meet in,
It cannot such as bear to need to take strengthening measure, be entrusted outer detection unit inspection to calculate and (be detailed in " newly-built Chang Zhu Tan inter-city passenger rail comprehensive III
Mark 216# pier Hanging Basket and retreat and remove inspection and calculate report "), hanging basket main truss, upper front beam amount of deflection, intensity are all satisfied requirement, but it is upper after
Only amount of deflection meets crossbeam, and brace maximum stress is more than allowable stress value, is unsatisfactory for code requirement, it is proposed that increases water at brace
Flat chord member.Scene, which is imagined, increases horizon bar in upper rear cross beam position, and horizon bar is spliced to form using 12, adopts between rod piece and rod piece
It is fully welded with fillet weld, weld bead height is not less than 8mm.After inspection calculates and increases horizon bar, rear cross beam maximum stress meets intensity and wants
It asks.
After being unclamped for anchor point after Hanging Basket, the problem of cradle structure torque is without safety stock, using increasing cradle structure branch
Point increases structural stability.Increase vertical supporting steel member and longitudinal nose girder under the piece of two sides diamond shape purlin, uses duplex between bilateral
Word steel is welded to connect, and is increased to reinforce between rod piece angle point and walking rails in every side and be connected with Double-layer two-splice I-steel, by Hanging Basket
Stress system is converted into freely supported structure by cantilever design, so that cradle structure torque is had safety stock during traveling, and be not required to
To increase the frictional force that counterweight increases suspended basket in anchor position after former to Hanging Basket, increase rod piece and only increase structural stability, be not necessarily to
Inspection is calculated.
After the completion of reinforcing, Hanging Basket bottom basket and template system are fallen 2.95m in two times, first time whereabouts 2.35m is exited
Both the segment 4# position falls 0.6m again after wired, is fixed side form and crossbeam using wirerope and chain block.216# pier span centre
Bottom elevation is 82.35m, and the segment 4#, the segment 4# lower section is in both wired outer, the segment bottom elevation 80.44m, 2# bottom elevation
79.86m.Hanging Basket bottom basket and bed die top surface absolute altitude are first dropped into 80.00m in span centre position before retracting, Hanging Basket is retreated to 4# and saved
Duan Shi, bed die and beam bottom headroom 0.44m, basket bottom absolute altitude in Hanging Basket bottom is 79.18m at this time.K4 line and Hunan steel industrial siding K5 carrier cable
Absolute altitude 77.101m, Hanging Basket bottom and carrier cable height difference 2.1m.Hanging Basket retreats to both wired outer rear (segment 4#) and again drops to bottom basket
Then 79.4m retreats Hanging Basket to the segment 2#, complete to retreat.
Adjustment fixed pulley spacing is determined using method in vector distance point, specifically, considers to be not provided with adjustment pulley, arrangement first
The case where rectilinear orbit, the Hanging Basket forward and backward crossbeam both sides that retract respectively have an essence to prick spiral shell mosquito steel as hanging basket bed die and side form
Supporting member, it is 15cm, walking rails route (i.e. Hanging Basket rollback route) at a distance from beam body flange plate that every essence, which pricks spiral shell mosquito steel,
The distance between Hanging Basket theory plan rollback route is vector distance.Hanging Basket arranges that rectilinear orbit retracts, Hanging Basket rollback route and extension
26cm vector distance is generated between basket theory plan rollback route, Hanging Basket side essence, which pricks spiral shell mosquito steel, will collide beam flange plate, and Hanging Basket has side
The security risk inclined, it is also possible to can not complete to retreat in limited construction skylight point, rest on Hanging Basket on both wired, to transport
Busy Shanghai elder brother line traffic safety makes a big impact.Therefore the curve element arrangement that track only presses beam is retreated, is to sum up analyzed, only
Arrangement adjustment fixed pulley can be considered, the case where design curve track out of shape.
Rail overall length is by many single straight rails, the similar curve track of composition.Method is for adjusting in vector distance point
The method of difference (claiming vector distance) between the whole practical rollback route of Hanging Basket and theoretical rollback route, makes Hanging Basket in back off procedure central sill
The offset distance of cross-sectional direction is less than the minimum safe distance 15cm between Hanging Basket and beam body flange plate；It is calculated through drawing, using fixed
When the dilatory steel hinge line of one of adjustment of the every 10m of pulley is linear, vector distance 10cm is adjusted together using the every 5m of fixed pulley and is drawn steel hinge line
When linear, vector distance 2.5cm, it is contemplated that Hanging Basket cannot be greater than 3cm in the upper deviation of practical back off procedure middle orbit, otherwise
Hanging Basket has the risk for deflecting away from rail, may cause security risk or needs that satisfactory after correcting is taken to delay and moves back the Hanging Basket time, institute
Every 5m is selected to adjust the linear scheme of dilatory steel hinge line together with method in vector distance point, vector distance adjusted is 2.5cm, is less than track
Traveling difference 3cm and flange plate safe distance 15cm guarantees that the traveling of Hanging Basket rollback is safe and smooth.
Arrange continuously dragging jack, Hanging Basket mobile frictional force: bed die and side form system gross weight 30t, Hanging Basket self weight 30t,
Gross weight N=60t.Startup power: steel friction coefficient μ takes 0.2, starts frictional force F=μ N=600 × 0.2=120KN；Sliding
Power: steel friction coefficient μ takes 0.15, starts frictional force F=μ N=600 × 0.15=90KN.It is moved according to the above Hanging Basket that calculates
The smallest startup power is moved greater than 120KN, could the dilatory movement of Hanging Basket, Hanging Basket movement stretch-draw jack is set by two fulcrums and dragged
It draws, so it is 60KN that jack lowest pull is drawn in everywhere, jack selects ZLD20 type stretch-draw jack, maximum stretching force
For 200KN, it can know that 2 ZLD20 type stretch-draw jacks can draw movable hanging basket from calculating, due to using continuously tensioning
Method avoids the compartment for moving back anchor, oil return, upper anchor, and everywhere draws jack and connected by 2 jack, thus realize
One tensioning, another is moved back anchor, oil return, upper anchor, toward the continual progress tensioning operation of complex Alternating.From the safety stock for moving back Hanging Basket
Consider, Hanging Basket anchor point is drawn in everywhere, increases by one of steel strand wires and 2 jack connect and draw Hanging Basket, Hanging Basket is made to retract
Process is safer, and in practice, Hanging Basket retracts dilatory jack everywhere by 4 ZLD20 type stretch-draw jack combination of two
It forms, point is drawn at two and configures 8 ZLD20 type stretch-draw jacks altogether.
After jack arranges, it is fixedly mounted by counter-force seat, counter-force seat basis utilizes anchor embedded hole after 0# block original Hanging Basket,
Steel locking steel plate is pricked using essence to be formed, and then welds counter-force seat on the steel plate.Finally install traction steel strand wires and jack etc.
Pulling equipment.It is drawn using jack and dismantles Hanging Basket after Hanging Basket retracts to home.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (7)
1. a kind of Curved Continuous Beams Hanging Basket fast fallback method over long distances, which comprises the steps of:
S1 Hanging Basket rollback pre-structure is reinforced: increasing vertical supporting steel member and longitudinal nose girder under main couple, by Hanging Basket beaer
System is converted into freely supported structure and is examined to calculate Hanging Basket reinforcement system by cantilever design, guarantees the stabilization row that entire Hanging Basket system moves back；
S2 Hanging Basket bottom basket and template fall and fix: as needed, by Hanging Basket bottom basket and template system whereabouts suitable distance, wait hang
After the completion of basket bottom basket and template system fall, using chain block, sunpender or wirerope by side form and bed die system on Hanging Basket
Lower beam, which is connected and fixed, forms an entirety；
Hanging Basket rollback line adjustment fixed pulley is arranged in S3, arranges class curved path walking track and installation pulling equipment；
S4 removes Hanging Basket after so that Hanging Basket is retracted to outside existing safety line using pulling equipment.
2. a Curved Continuous Beams Hanging Basket according to claim 1 fast fallback method over long distances, which is characterized in that step
In S3, is adjusted using method in vector distance point and determine fixed pulley spacing.
3. a Curved Continuous Beams Hanging Basket according to claim 2 fast fallback method over long distances, which is characterized in that use
Method adjusts the detailed process for determining fixed pulley spacing in vector distance point are as follows: according to Hanging Basket in the inclined of back off procedure central sill cross-sectional direction
Away from the minimum safe distance being less than between Hanging Basket and beam body flange plate, and is considering security risk and satisfactory after correcting is taken to delay
In the case where moving back the Hanging Basket time, the safe difference between the practical rollback route of Hanging Basket and theoretical rollback route, i.e. safety arrow are set
Away from laying determines the spacing between fixed pulley, calculate the practical rollback line of Hanging Basket for adjusting the linear fixed pulley of dilatory steel strand wires
Vector distance between road and theoretical rollback route, makes the vector distance be less than safe vector distance.
4. a Curved Continuous Beams Hanging Basket according to claim 1 fast fallback method over long distances, which is characterized in that step
In S3, pulling equipment includes dilatory jack, steel strand wires and automatic continuous jacking pumping plant, and the dilatory jack passes through counter-force seat
It is fixedly mounted.
5. a Curved Continuous Beams Hanging Basket according to claim 4 fast fallback method over long distances, which is characterized in that step
In S4, the detailed process of Hanging Basket rollback is made using pulling equipment are as follows: Hanging Basket movement sets dilatory jack by two fulcrums and draws.
6. a Curved Continuous Beams Hanging Basket according to claim 5 fast fallback method over long distances, which is characterized in that each
Dilatory more dilatory jack of fulcrum arranged in series.
7. a Curved Continuous Beams Hanging Basket according to claim 1 fast fallback method over long distances, which is characterized in that step
In S1, after anchor point unclamps after Hanging Basket, using cradle structure fulcrum is increased, increase stable structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810220215.2A CN108411795B (en) | 2018-03-16 | 2018-03-16 | An a kind of Curved Continuous Beams Hanging Basket fast fallback method over long distances |
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| CN201810220215.2A CN108411795B (en) | 2018-03-16 | 2018-03-16 | An a kind of Curved Continuous Beams Hanging Basket fast fallback method over long distances |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008050907A (en) * | 2006-08-28 | 2008-03-06 | Yokogawa Bridge Holdings Corp | Bridge girder member erecting construction method and bridge girder member erecting device used therefor |
| CN101586330B (en) * | 2008-05-22 | 2011-01-26 | 中铁十一局集团第一工程有限公司 | Receding construction method of cradle of continuous girder bridge made of prestressing concrete |
| CN205399229U (en) * | 2016-03-11 | 2016-07-27 | 李涛 | Bridge triangle hanging basket |
| CN206070393U (en) * | 2016-09-20 | 2017-04-05 | 中交武汉港湾工程设计研究院有限公司 | A kind of asynchronous construction hanging basket of Wavelike steel webplate composite beam bridge |
| CN206625137U (en) * | 2017-03-16 | 2017-11-10 | 中铁十局集团第二工程有限公司 | The cast-in-place closure segment Hanging Basket of one kind swivel cantilever beam slides running gear |
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