CN108301328A - One kind getting higher change and indulges horizontal curve steel box girder construction method - Google Patents
One kind getting higher change and indulges horizontal curve steel box girder construction method Download PDFInfo
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- CN108301328A CN108301328A CN201810100707.8A CN201810100707A CN108301328A CN 108301328 A CN108301328 A CN 108301328A CN 201810100707 A CN201810100707 A CN 201810100707A CN 108301328 A CN108301328 A CN 108301328A
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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
Change is got higher the invention discloses one kind and indulging horizontal curve steel box girder construction method, including sets up temporary rest pier；Lift the crossbeam of C1-C4 bridge pier pier tops；Prefabricated steel box-girder；Prefabricated steel box-girder is transported with scalable flat car to building site, is turned over；Crossbeam carries out steel box-girder installation after installation is complete；Before steel box-girder installation, repetition measurement is carried out to the pier elevation of top surface, center line and across footpath of bearing, bridge pier and temporary rest pier；Using welding suspension centre lifting method；It is welded and fixed after lifting；After the welding for completing steel box-girder joints, with interim locator erecting bed splicing part wing plate, complete to weld stitching portion；Remove temporary rest pier；Pitch paying concrete mat formation face layer and complete bridge deck remainder work.The change that gets higher of the present invention indulges horizontal curve steel box girder construction method to have the advantages that technical feasibility, economical rationality, simple for process, easy to operate, construction safety, meets the developing direction of modern engineering technology, thus has larger promotion prospect.
Description
Technical field
It getting higher change the present invention relates to the technical field of buildings of municipal construction more particularly to one kind and indulges horizontal curve steel box-girder
Construction method.
Background technology
With the fast development of China's economic and transportation business, many urban municipal construction of China are to existing city
Bridge is transformed, to meet growth requirement.The displacement technique of the existing bridge in city is the new technology developed in recent years, is had
Short construction period, the features such as economic and practical, building energy consumption is low, urban ecological environment quality is ensured, for this purpose, obtaining more next
More it is widely applied.With the expansion of highway in China construction scale, crossings on different level construction during construction of the highway, across busy height
Fast construction of the highway situation is more and more, and various large spans, the bridge structure of large-tonnage are also come into being.Currently, compared with large span
Simply supported girder bridge mostly uses T section beam or box-girder, the former is referred to as T beams, and the latter is referred to as box beam.Box beam includes mixed
Solidifying soil box beam, steel box-girder and compound section steel box girder.Because the T beam bridge lateral stiffness of T beams composition is smaller, anti-twisting property is poor, and pacifies
Stability when dress is poor, is used when being not suitable for compared with large span.Simply supported girder bridge compared with large span generally uses box beam.Work as span
When larger, the weight of concrete box girder is very big, and difficulty is brought to pouring or setting up.Compound section steel box girder by lower part steel case and
Concrete slab on top flange plate is composed, and is connected by shear connector.It is strong that concrete anti-compression ability is utilized,
And the feature that steel tensile capacity is high, take full advantage of material property.The anti-twisting property of steel box-girder is strong, and erection construction is easy, and fits
It closes and is applied to highway and Urban Bridge.With the fast development of China's steel and iron industry and long strands, the number of steel structure bridge
Amount is also being continuously increased, and steel box girder span is big, service life is long, box section torsional rigidity is big, depth of section is small, whole
The good feature of body makes steel box girder be widely used in municipal administration and Design of Highway Bridge and building course, existing
Have become the first choice of large-span girder form.But there are no indulge horizontal curve steel box girder construction for getting higher change in the prior art
Method.
Invention content
Based on the above the deficiencies in the prior art, technical problem solved by the invention, which is to provide one kind, to be got higher change and indulges
Horizontal curve steel box girder construction method, this method technical feasibility, economical rationality, simple for process, easy to operate, construction safety.
It getting higher change in order to solve the above technical problem, the present invention provides one kind and indulges horizontal curve steel box girder construction method, wrap
Include following steps:
One, after bridge pier completion, temporary rest pier is set up, and the erection support on temporary rest pier, wherein bridge pier are four, point
It Wei not C1, C2, C3 and C4；
Two, the crossbeam for lifting C1-C4 bridge pier pier tops, is fixed temporarily；
Three, prefabricated steel box-girder, in 12 segment processing and fabricatings of factory point；
Four, prefabricated steel box-girder is transported with scalable flat car to building site, after turn, is lifted immediately to temporary rest pier pier top
On, and be fixed temporarily；
Five, crossbeam carries out steel box-girder installation, holder base plate is cleared up before in place after installation is complete；
Six, before steel box-girder installation, pier elevation of top surface, center line and the across footpath of bearing, bridge pier and temporary rest pier are answered
It surveys, error is installed again in tolerance；
Seven, using welding suspension centre lifting method, every steel box-girder selects 4 suspension centres, and lifting is located in top of bridge pier and interim
In pier top；
Eight, it is welded and fixed after lifting, 12 steel box-girders welding are integral, by first steel box-girder joints
It is adjusted to design requirement position, completes joints welding, residual correction section is in last welding；
Nine, it after the welding for completing steel box-girder joints, with interim locator erecting bed splicing part wing plate, completes
Stitching portion is welded, more case multicells are converted into single-box multi-cell；
Ten, temporary rest pier is removed；
11, in installing WELDING STUDS on the top plate of steel box-girder, area's anti-collision wall and flower trough, the areas Dai Tong are installed by pour concrete area
After reaching design strength, then steel fibre concrete area is poured into a mould, after concrete reaches design strength after steel fibre concrete area, steel fibre concrete area is installed
Anti-collision wall and flower trough, pitch paying concrete mat formation face layer and complete bridge deck remainder work.
Embodiment as a preferred embodiment of the above technical solution, it is provided in an embodiment of the present invention to get higher change and indulge horizontal curve steel
Box girder construction method further comprises some or all of following technical characteristic：
Steel box-girder processing and fabricating in the step 3 includes：
(1) form of upside-down mounting is used, face carries out assembled on the basis of the top plate of steel box-girder, and when upside-down mounting ensures steel box-girder
Web and ground are vertical, and arch camber curve controlled arch camber is linear and adds millesimal welding deformation amount；
(2) every steel box girder assembling：
Step 1：Assembled moulding bed is set up；The cross fall of moulding bed：C1-C2 is gradient to 0% to extra curvature 2%； C2-C3
Into curve, 0% is gradient to 2%；C3-C4 is into curve 2%；
Step 2：The top plate of jointing steel box beam installs the inside diaphragm plate of steel box-girder after the assay was approved；
Step 3：The partition board of steel box-girder is installed；
Step 4：The steel structure model of steel box-girder is established using BIM technology, carries out node modeling and FEM calculation, knot
Structure overall deformation calculates and construction simulation analysis, and line style is adjusted when facilitating processing, adjusts the intermediate abdomen of installation steel box-girder after line style
Plate and intermediate internal partition；
Step 5：Two end webs of steel box-girder are installed；
Step 6：The bottom plate of steel box-girder is installed；
(3) prefabrication steel box-girder is transported after trying split lattice.
The structure of the temporary rest pier includes：
(1) temporary rest pier uses bracket assembled, form to use steel pipe truss structures；
(2) drawknot form uses 114 × 5mm of pipe；
(3) pedestal of temporary rest pier uses 4000 × 1600 × 30mm steel plates, and 8 28 Ribbed Bars of Φ is used in combination to fix,
The fixed position of 8 28 Ribbed Bars of Φ is evenly distributed in around steel plate；
(4) temporary rest pier top sets micromatic setting, and subsequent handling is facilitated to adjust joint location.
The step of turn of steel box-girder, includes in the step 4：
(1) every steel box-girder turns over step：Two cranes lift steel box-girder → mono- crane slowly loose hook, and another is hung
Vehicle hangs away steel box-girder → steel box-girder one end is put on sleeper, slowly puts down steel box-girder → two crane and links up with → two again
Crane lifts steel box-girder entrucking；
(2) crane center of gravity and to sling the suspension centre distance of steel box-girder be 7000mm, the elevation angle of suspension arm of crane is 72 °.
Further include measuring rate-determining steps：
(1) steel box-girder axial line control：The plane curve of steel box-girder is transitional surface camber line, and plane has size different at 25；
Construction simulation scheme is carried out with BIM technology；
Before steel box-girder lifting, axis and bridge center line are first released on bridge pier according to coordinate；Each line of check after having welded
And stamp ocean punching mark；
Steel box-girder lift it is in place when from bearing about 50mm when, accurate adjustment crossbeam allows steel box-girder center line and axis to correspond to bridge
Each line of pier；
The registration of each line is checked, and in bearing four sides installation limit code, slowly loose hook is in place for crane, in loose hook process
In pay attention to the offset of each line at any time；
(2) steel box-girder absolute altitude controls：Steel box-girder box height is from 1.38m to 2.0m；
According to table of altitude, the elevation of each fulcrum at each temporary rest pier is calculated with BIM technology；
Support plate is installed on temporary rest pier top according to each branch point height, each fulcrum is after installation is complete again with laser through big
Instrument checks elevation；
After steel box-girder lifting after box beam Primary Location, steel box-girder top plate elevation is checked with level meter, again if any deviation
Adjustment；
(3) steel box-girder center line, front and back position control
Steel box-girder center line is released on temporary rest pier, its center line is directed at when steel box-girder lifts positioning；
The longitudinal pitch size of transverse stiffener adjusts spacing on the basis of steel box-girder, and same section is wanted two panels steel box-girder same
When construct, to prevent " dislocation " of transverse stiffener.
The arrangement of every steel box-girder suspension centre includes in the step 7：
(1) steel box-girder most weighs 57 tons, is lifted by crane using 220 tons of loop wheel machine two-shippers, and 4 suspension centres, hoisting point position is arranged：Leave steel
2m at box beam outermost edge；
(2) position of centre of gravity of every steel box-girder is determined using BIM technology；
(3) for the center of gravity of steel box-girder on the vertical plane where the line at both ends lifting lug midpoint, error is no more than 10mm；
(4) lifting lug should penetrate, and weld bead height must not be less than 24mm；
(5) lifting lug must not be located in the top plate at the partition position of steel box-girder；
(6) lifting lug position sets stiffener reinforcing.
Steel box-girder in the step 8 be welded and fixed including：
(1) steel box-girder is connected using full weldering, longitudinal from span centre to both ends, is laterally symmetrically carried out from center line to both sides；
(2) top plate for first welding steel box-girder welds the bottom plate of steel box-girder, the web of rear steel box-girder again；
(3) top plate uses top plate following table face paste ceramic substrate, welder to be welded in cover top surface, and welding sequence is
It is welded from intermediate toward both sides；
(4) web welding using ceramic substrate is pasted outside the enclosure, and welder welds in babinet, welding sequence two
Welder is symmetrically welded；
(5) bottom plate uses bottom plate following table face paste ceramic substrate, and welder weld in babinet, welding sequence for from
It is intermediate to be welded toward both sides；
(6) control of welding joining temperature is at 20 DEG C ± 5 DEG C, and the time selects 3:00 AM at 9 points in the morning；
(7) temperature difference amendment, weld contraction amendment, the amendment of section mouth seam, capital spacing amendment are completed at same section.
By upper, the change that gets higher through the invention indulges horizontal curve steel box girder construction method to establish mathematics computing model, accurately
Calculate size, curvature and the angle of the broaden three-dimensional coordinate positioning and deformation allowance and steel member that get higher each position of structure
Degree, accurately calculates blanking compact dimensions and curvature, determines the center of gravity of steel box-girder, company of the center of gravity in both ends lifting lug center line
Line institute on the vertical plane, so that it is determined that the position of suspension centre.Realize Virtual Construction：Building course, virtual mould are executed on computers
Type can predict the potential problems such as the function of engineering project and constructability before actually building, including construction method
Experiment, construction simulation analysis and arrangement and method for construction optimization etc..In terms of the surrounding enviroment of construction site：To construction environment and engineering construction
Content carries out panorama achievement simulation, construction personnel can be allowed to understand project content design requirement deep, to be conducive to construct
It makes smooth advances.Effective combination of special profession and computer technology, such as accurate measuring apparatus instrument, advanced welding nothing
Effective combination with computer such as detection device, blanking processing numerical control device is damaged, calculating can be automatically analyzed, draw figure line and seat
Mark song line, output parameter and result.The change that gets higher of the present invention indulges horizontal curve steel box girder construction method to have technical feasibility, warp
Help reasonable, simple for process, easy to operate, construction safety the advantages of, meet the developing direction of modern engineering technology, thus have
Larger promotion prospect.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, and in order to allow the above and other objects, features and advantages of the present invention can
It is clearer and more comprehensible, below in conjunction with preferred embodiment, and coordinates attached drawing, detailed description are as follows.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make simply to the attached drawing of embodiment below
It introduces.
Fig. 1 be the present invention get higher the process flow chart for indulging horizontal curve steel box girder construction method.
Fig. 2 is that getting higher for the preferred embodiment of the present invention indulges cuing open for the steel box-girder in horizontal curve steel box girder construction method
Face figure.
Fig. 3 is that getting higher for the preferred embodiment of the present invention indulges dividing for the steel box-girder in horizontal curve steel box girder construction method
Duan Tu.
Fig. 4 a-4f are that the preferred embodiment of the present invention gets higher the steel box-girder indulged in horizontal curve steel box girder construction method
Procedure of processing figure.
Fig. 5 is that the preferred embodiment of the present invention gets higher the temporary rest pier knot indulged in horizontal curve steel box girder construction method
Composition.
Fig. 6 a-6g are that the preferred embodiment of the present invention gets higher the steel box-girder indulged in horizontal curve steel box girder construction method
Turn block diagram.
Fig. 7 is that the preferred embodiment of the present invention gets higher the steel box-girder suspension centre indulged in horizontal curve steel box girder construction method
Layout drawing.
Specific implementation mode
The specific implementation mode that the invention will now be described in detail with reference to the accompanying drawings, as part of this specification pass through
Embodiment illustrates that the principle of the present invention, other aspects of the present invention, feature and its advantage will become by the detailed description
It is very clear.In the attached drawing of institute's reference, same or analogous component carrys out table using identical drawing reference numeral in different figures
Show.
Embodiment
The embodiment of the present invention, which is located at Guang Shen highways-, to be started main road grade separation and is located at Luogang District and Huangpu District intersection, wide deep
Highway is Class I highway, is in east-west, and it is city thoroughfare to start main road, is in south-north direction.Main road main line is started using high
Bridged crossing Guang Shen highways, the North connect with existing main road of starting, and the south connects with rich South Road.Wherein C ring roads are crossed over wide deep public
Road, using 49.293+55.5+44m steel box-girders (girder), the long 148.793m of bridge, the wide 10.2-12.1m of bridge (broadening), babinet is high
1.38-2.0m (is got higher), is divided into 12, the long 25.6m of maximum steel box-girder, width 5.04m, high 2m, weight 57.1t, C1-C4 crossbeams
In maximum steel using amount be 31.2t, the total steel amount 673.9t of C ring roads.The ring road variation in moulding is big, and plane curve is transitional surface arc
Line, facade curve are gradual change inclined-plane curve, and installation difficulty is big.
As shown in Fig. 1 to 7, the change that gets higher of the invention indulges horizontal curve steel box girder construction method to include the following steps:
One, after bridge pier completion, temporary rest pier is set up, and the erection support on temporary rest pier, wherein bridge pier are four, point
It Wei not C1, C2, C3 and C4.Wherein, temporary rest pier uses steel pipe truss structures, structure type to use 114 × 5mm of pipe, temporarily
The structure of buttress includes：
(1) temporary rest pier uses bracket assembled, form to use steel pipe truss structures；
(2) drawknot form uses 114 × 5mm of pipe；
(3) pedestal of temporary rest pier uses 4000 × 1600 × 30mm steel plates, and 8 28 Ribbed Bars of Φ is used in combination to fix,
The fixed position of 8 28 Ribbed Bars of Φ is evenly distributed in around steel plate；
(4) temporary rest pier top sets micromatic setting, and subsequent handling is facilitated to adjust joint location.
Two, the crossbeam for lifting C1-C4 bridge pier pier tops, is fixed temporarily.
Girder is divided into 6 sections of 12 constructions by three, prefabricated steel box-girder in 12 segment processing and fabricatings of factory point, construction,
To facilitate making, transport and installation, it is specifically shown in piecewise graph such as table 1：
Table 1
The selection of erection method：Steel box-girder sectional dimension be 1#, 2#, 3#, 4# (5100 × 2000 × 25000mm), 5#,
6#, 7#, 8# (5100-6050 × 2000 × 25000mm) and 9#, 10#, 11#, 12# (6050 × 2000 × 25000mm), in order to
Assembly is convenient and convenient for control, and using the form of upside-down mounting, face carries out assembled on the basis of top plate, and when upside-down mounting ensures web and ground
Face is vertical, and linear and add millesimal welding deformation amount in strict accordance with design arch camber curve controlled arch camber.
Assembled sequence is first to be laid with top plate 10, installs diaphragm plate inside box beam after the assay was approved, then installs partition board
20, after adjusting line style, web 30, last mounting base 40 are installed.As shown in Fig. 4 a to Fig. 4 f, Fig. 4 a are assembled moulding bed
It sets up, Fig. 4 b are assembled top plate, Fig. 4 c are installation partition board, Fig. 4 d are installation middle pectoral plate and intermediate internal partition, Fig. 4 e are installation
Two end webs, Fig. 4 f are mounting base.12 sheet bodies of segmentation of steel box-girder 6, the first round 1# and 2# when assembled, 3# and 4#, 5# and
Two sections of 6#, 7# and 8#, 9# and 10#, 11# and 12# progress integral manufacturings.
Typical beam section is assembled：The general process of assembling of steel bridge is now illustrated by taking the assembly of typical standard section as an example,
The assembled process that he is segmented is similar.
Wherein, steel box-girder processing and fabricating includes：
(1) form of upside-down mounting is used, face carries out assembled on the basis of the top plate 10 of steel box-girder, and when upside-down mounting ensures steel box-girder
Web 30 it is vertical with ground, arch camber curve controlled arch camber is linear and adds millesimal welding deformation amount；
(2) every steel box girder assembling：
Step 1：Assembled moulding bed is set up；The cross fall of moulding bed：C1-C2 is gradient to 0% to extra curvature 2%； C2-C3
Into curve, 0% is gradient to 2%；C3-C4 is into curve 2%.
Step 2：The top plate 10 of jointing steel box beam installs the inside diaphragm plate of steel box-girder after the assay was approved.
Step 3：The partition board 20 of steel box-girder is installed.
Step 4：The steel structure model of steel box-girder is established using BIM technology, carries out node modeling and FEM calculation, knot
Structure overall deformation calculates and construction simulation analysis, and line style is adjusted when facilitating processing, adjusts the intermediate abdomen of installation steel box-girder after line style
Plate 31 and intermediate internal partition.
All it is the concept for resting on AntoCAD two-dimensional loftings in the past for the construction of engineering project, intuitive rate is not high, with
The continuous development of BIM technology, three-dimensional concept is especially prominent in Municipal Industry, and BIM technology can be carried out according to project characteristic
Construction deployment and technical quality control formulate technical solution and confide a technological secret, difficult point details, steel knot in solution project
The accurate installation of structure, Project cooperation management and the problems such as site construction management.Project under construction in the present invention passes through to steel construction
The technological difficulties such as construction technology carry out BIM simulations.
Since the engineering steel construction of the present invention has the characteristics that the scale of construction is big, it is wide to announce, type is more, complicated, steel using amount
Up to 700t, complexity is connect with reinforced concrete bridge pier.Before formal construction, Deepen Design personnel utilize BIM technology, will own
Steel construction carries out setting-out simulation, in steel construction process segment, welding job.By linking up, having been formed closely with structure design teacher
Kind Deepen Design scheme instructs site operation.
Spatial model is established by professional softwares such as MST, XSTEEL, ANSYS, SAP, MIDAS, 3DMAX, carries out node
Modeling and FEM calculation, structure overall deformation calculates and construction simulation analysis.
The invention solves following two big priority and difficulties：
(1) control of center of gravity
The steel box-girder radian is big, and camber line is asymmetric camber line, and steel box-girder itself is the box beam of variable cross-section again, makes steel case
The extremely difficult decision of center of gravity and equalization point of beam, center of gravity use BIM technology, set the calculating that suspension centre can be just carried out after center of gravity.
(2) line type control of bridge
The bridge is also transitional surface camber line in facade and in-plane, makes bridge in addition to the features such as radian is big, variable cross-section
The control of whole line style be difficult to ensure.By the conflict of three-dimensional BIM models Feedback Design and construction accurately and in time, simultaneously
It again can be to intuitive perceptual knowledge there are one proposed bridges, to ensure that the alignment control of bridge.
Step 5：Two end webs 32 of steel box-girder are installed.
Step 6：The bottom plate 40 of steel box-girder is installed.
(3) prefabrication steel box-girder is transported after trying split lattice.
Four, prefabricated steel box-girder is transported with scalable flat car to building site, after turn, is lifted immediately to temporary rest pier pier top
On, and be fixed temporarily；Wherein, the step of turn of steel box-girder includes：
(1) every steel box-girder turns over step：Two cranes lift steel box-girder → mono- crane slowly loose hook, and another is hung
Vehicle hangs away steel box-girder → steel box-girder one end is put on sleeper, slowly puts down steel box-girder → two crane and links up with → two again
Crane lifts steel box-girder entrucking；
(2) crane center of gravity and to sling the suspension centre distance of steel box-girder be 7000mm, the elevation angle of suspension arm of crane is 72 °.
As shown in Fig. 6 a to 6g, two cranes have lifted girder steel in Fig. 6 b；A crane slowly loose hook, another in Fig. 6 c
Platform crane slings girder steel；Girder steel one end is put on sleeper in Fig. 6 d, slowly puts down girder steel；Two cranes are hung again in Fig. 6 e
Hook；Two cranes lift girder steel entrucking in Fig. 6 f；Two cranes lift girder steel entrucking in Fig. 6 g.
Steel box-girder makes in factory, needs to transport to scene, be turned over, and turns over place in 107 national highway of project management department south
It carries out in enclosure wall, after girder steel turns over, is turned around by existing track of changing its course starting main road, transport C ring roads erecting bed to.
Five, crossbeam carries out steel box-girder installation, holder base plate is cleared up before in place after installation is complete；
Six, before steel box-girder installation, pier elevation of top surface, center line and the across footpath of bearing, bridge pier and temporary rest pier are answered
It surveys, error is installed again in tolerance；
Seven, using welding suspension centre lifting method, every steel box-girder selects 4 suspension centres, and lifting is located in top of bridge pier and interim
In pier top；The arrangement of every steel box-girder suspension centre includes：
(1) steel box-girder most weighs 57 tons, is lifted by crane using 220 tons of loop wheel machine two-shippers, and 4 suspension centres, hoisting point position is arranged：Leave steel
2m at box beam outermost edge；
(2) position of centre of gravity of every steel box-girder is determined using BIM technology；
(3) for the center of gravity of steel box-girder on the vertical plane where the line at both ends lifting lug midpoint, error is no more than 10mm；
(4) lifting lug should penetrate, and weld bead height must not be less than 24mm；
(5) lifting lug must not be located in the top plate at the partition position of steel box-girder；
(6) lifting lug position sets stiffener reinforcing.
Eight, it is welded and fixed after lifting, 12 steel box-girders welding are integral, by first steel box-girder joints
It is adjusted to design requirement position, completes joints welding, residual correction section is in last welding；Wherein steel box-girder is welded and fixed
Including：
(1) steel box-girder is connected using full weldering, longitudinal from span centre to both ends, is laterally symmetrically carried out from center line to both sides；
(2) top plate for first welding steel box-girder welds the bottom plate of steel box-girder, the web of rear steel box-girder again；
(3) top plate uses top plate following table face paste ceramic substrate, welder to be welded in cover top surface, and welding sequence is
It is welded from intermediate toward both sides；
(4) web welding using ceramic substrate is pasted outside the enclosure, and welder welds in babinet, welding sequence two
Welder is symmetrically welded；
(5) bottom plate uses bottom plate following table face paste ceramic substrate, and welder weld in babinet, welding sequence for from
It is intermediate to be welded toward both sides；
(6) control of welding joining temperature is at 20 DEG C ± 5 DEG C, and the time selects 3:00 AM at 9 points in the morning；
(7) temperature difference amendment, weld contraction amendment, the amendment of section mouth seam, capital spacing amendment are completed at same section.
Nine, it after the welding for completing steel box-girder joints, with interim locator erecting bed splicing part wing plate, completes
Stitching portion is welded, more case multicells are converted into single-box multi-cell；
Ten, temporary rest pier is removed；
11, in installing WELDING STUDS on the top plate of steel box-girder, area's anti-collision wall and flower trough, the areas Dai Tong are installed by pour concrete area
After reaching design strength, then steel fibre concrete area is poured into a mould, after concrete reaches design strength after steel fibre concrete area, steel fibre concrete area is installed
Anti-collision wall and flower trough, pitch paying concrete mat formation face layer and complete bridge deck remainder work.
The present invention get higher change indulge horizontal curve steel box girder construction method further include measure rate-determining steps：
(1) steel box-girder axial line control：The plane curve of steel box-girder is transitional surface camber line, and plane has size different at 25；
Construction simulation scheme is carried out with BIM technology；
Before steel box-girder lifting, axis and bridge center line are first released on bridge pier according to coordinate；Each line of check after having welded
And stamp ocean punching mark；
Steel box-girder lift it is in place when from bearing about 50mm when, accurate adjustment crossbeam allows steel box-girder center line and axis to correspond to bridge
Each line of pier；
The registration of each line is checked, and in bearing four sides installation limit code, slowly loose hook is in place for crane, in loose hook process
In pay attention to the offset of each line at any time；
(2) steel box-girder absolute altitude controls：Steel box-girder box height is from 1.38m to 2.0m；
According to table of altitude, the elevation of each fulcrum at each temporary rest pier is calculated with BIM technology；
Support plate is installed on temporary rest pier top according to each branch point height, each fulcrum is after installation is complete again with laser through big
Instrument checks elevation；
After steel box-girder lifting after box beam Primary Location, steel box-girder top plate elevation is checked with level meter, again if any deviation
Adjustment；
(3) steel box-girder center line, front and back position control
Steel box-girder center line is released on temporary rest pier, its center line is directed at when steel box-girder lifts positioning；
The longitudinal pitch size of transverse stiffener adjusts spacing on the basis of steel box-girder, and same section is wanted two panels steel box-girder same
When construct, to prevent " dislocation " of transverse stiffener.
Steel box-girder segmentation in the present invention is divided into longest component and grows 25 meters, and 5.4 meters of width is 2 meters high, most weighs 57 tons.Fortune
It is defeated using scalable flat car transport, the influences such as gap bridge, limit for height, limit for width in fully considering transportational process, it is careful consideration and
Traffic program is worked out, the selection of circuit should be proved on the spot, and perform various safety measures, such as the fixation of segmentation, big part
Transport alert flag, support vehicles etc.；Over-size transport abides by the regulation of relevant functional departments of government.
Indulge horizontal curve steel box girder construction method advantage as follows in the change that gets higher of the present invention：
(1) mathematics computing model is established, accurately calculates to broaden and gets higher the three-dimensional coordinate positioning at each position of structure and reserved
The size of deflection and steel member, curvature and angle, accurately calculate blanking compact dimensions and curvature, determine steel case
The center of gravity of beam, center of gravity both ends lifting lug center line line institute on the vertical plane, so that it is determined that the position of suspension centre.
(2) Virtual Construction is realized：Building course is executed on computers, and dummy model can be before actually building to work
The potential problems such as journey item purpose function and constructability are predicted, including construction method experiment, construction simulation analysis and construction
Scheme optimization etc..In terms of the surrounding enviroment of construction site：Panorama achievement simulation is carried out to construction environment and engineering construction content, it can
It is deep to allow construction personnel to understand project content design requirement, it makes smooth advances to be conducive to construction.
(3) effective combination of special profession and computer technology, such as accurate measuring apparatus instrument, advanced welding
The effective combination of non-destructive detecting device, blanking processing numerical control device etc. with computer, calculating can be automatically analyzed, draw figure line and
Coordinate curve, output parameter and result.
The present invention has the advantages that technical feasibility, economical rationality, simple for process, easy to operate, construction safety, meets existing
For the developing direction of engineering technology, thus there is larger promotion prospect.
The above is the preferred embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, it is noted that for those skilled in the art, without departing from the principle of the present invention, may be used also
To make several improvement and variation, these are improved and variation is also considered as protection scope of the present invention.
Claims (7)
1. one kind getting higher change and indulges horizontal curve steel box girder construction method, it is characterised in that：Include the following steps:
One, after bridge pier completion, temporary rest pier is set up, and the erection support on temporary rest pier, wherein bridge pier are four, respectively
C1, C2, C3 and C4；
Two, the crossbeam for lifting C1-C4 bridge pier pier tops, is fixed temporarily；
Three, prefabricated steel box-girder, in 12 segment processing and fabricatings of factory point；
Four, prefabricated steel box-girder is transported with scalable flat car to building site, after turn, is lifted immediately to temporary rest pier pier top, and
It is fixed temporarily；
Five, crossbeam carries out steel box-girder installation, holder base plate is cleared up before in place after installation is complete；
Six, before steel box-girder installation, repetition measurement, error are carried out to the pier elevation of top surface, center line and across footpath of bearing, bridge pier and temporary rest pier
It is installed again in tolerance；
Seven, using welding suspension centre lifting method, every steel box-girder selects 4 suspension centres, lifting to be located in top of bridge pier and interim pier top
On；
Eight, it is welded and fixed after lifting, 12 steel box-girders welding are integral, first steel box-girder joints is adjusted to
Joints welding is completed in design requirement position, and residual correction section is in last welding；
Nine, it after the welding for completing steel box-girder joints, with interim locator erecting bed splicing part wing plate, completes to splicing
More case multicells are converted into single-box multi-cell by place's welding；
Ten, temporary rest pier is removed；
11, in installing WELDING STUDS on the top plate of steel box-girder, area's anti-collision wall and flower trough are installed by pour concrete area, and the areas Dai Tong reach
After design strength, then steel fibre concrete area is poured into a mould, after after steel fibre concrete area, concrete reaches design strength, the anticollision in installation steel fibre concrete area
Wall and flower trough, pitch paying concrete mat formation face layer and complete bridge deck remainder work.
2. getting higher change indulges horizontal curve steel box girder construction method as described in claim 1, it is characterised in that：In the step 3
Steel box-girder processing and fabricating include：
(1) use the form of upside-down mounting, face carries out assembled on the basis of the top plate of steel box-girder, when upside-down mounting ensure steel box-girder web and
Ground is vertical, and arch camber curve controlled arch camber is linear and adds millesimal welding deformation amount；
(2) every steel box girder assembling：
Step 1：Assembled moulding bed is set up；The cross fall of moulding bed：C1-C2 is gradient to 0% to extra curvature 2%；C2-C3 is to song
0% is gradient to 2% in line；C3-C4 is into curve 2%；
Step 2：The top plate of jointing steel box beam installs the inside diaphragm plate of steel box-girder after the assay was approved；
Step 3：The partition board of steel box-girder is installed；
Step 4：The steel structure model of steel box-girder is established using BIM technology, carries out node modeling and FEM calculation, structure are whole
Body deformation calculates and construction simulation analysis, adjusts line style when facilitating processing, adjust after line style the middle pectoral plate of installation steel box-girder and
Intermediate internal partition；
Step 5：Two end webs of steel box-girder are installed；
Step 6：The bottom plate of steel box-girder is installed；
(3) prefabrication steel box-girder is transported after trying split lattice.
3. getting higher change indulges horizontal curve steel box girder construction method as described in claim 1, it is characterised in that：The temporary rest pier
Structure include：
(1) temporary rest pier uses bracket assembled, form to use steel pipe truss structures；
(2) drawknot form uses 114 × 5mm of pipe；
(3) pedestal of temporary rest pier uses 4000 × 1600 × 30mm steel plates, is used in combination 8 28 Ribbed Bars of Φ to fix, 8 Φ
The fixed position of 28 Ribbed Bars is evenly distributed in around steel plate；
(4) temporary rest pier top sets micromatic setting, and subsequent handling is facilitated to adjust joint location.
4. getting higher change indulges horizontal curve steel box girder construction method as described in claim 1, it is characterised in that：In the step 4
The step of turn of steel box-girder includes：
(1) every steel box-girder turns over step：Two cranes lift steel box-girder → mono- crane, and slowly loose hook, another crane are hung away
Steel box-girder → steel box-girder one end is put on sleeper slowly puts down steel box-girder → two crane and links up with → two cranes again lifting
Steel box-girder entrucking；
(2) crane center of gravity and to sling the suspension centre distance of steel box-girder be 7000mm, the elevation angle of suspension arm of crane is 72 °.
5. getting higher change indulges horizontal curve steel box girder construction method as claimed in claim 2, it is characterised in that：Further include measuring control
Step processed：
(1) steel box-girder axial line control：The plane curve of steel box-girder is transitional surface camber line, and plane has size different at 25；
Construction simulation scheme is carried out with BIM technology；
Before steel box-girder lifting, axis and bridge center line are first released on bridge pier according to coordinate；Each line is checked after having welded and is beaten
Upper ocean punching mark；
Steel box-girder lift it is in place when from bearing about 50mm when, accurate adjustment crossbeam allows steel box-girder center line and axis to correspond to bridge pier
Each line；
The registration of each line is checked, and in bearing four sides installation limit code, slowly loose hook is in place for crane, during loose hook at any time
Pay attention to the offset of each line；
(2) steel box-girder absolute altitude controls：Steel box-girder box height is from 1.38m to 2.0m；
According to table of altitude, the elevation of each fulcrum at each temporary rest pier is calculated with BIM technology；
Support plate is installed on temporary rest pier top according to each branch point height, each fulcrum is checked again with laser through big instrument after installation is complete
Elevation；
After steel box-girder lifting after box beam Primary Location, steel box-girder top plate elevation is checked with level meter, is readjusted if any deviation；
(3) steel box-girder center line, front and back position control
Steel box-girder center line is released on temporary rest pier, its center line is directed at when steel box-girder lifts positioning；
The longitudinal pitch size of transverse stiffener adjusts spacing on the basis of steel box-girder, and same section is wanted two panels steel box-girder to apply simultaneously
Work, to prevent " dislocation " of transverse stiffener.
6. getting higher change indulges horizontal curve steel box girder construction method as described in claim 1, it is characterised in that：In the step 7
The arrangement of every steel box-girder suspension centre includes：
(1) steel box-girder most weighs 57 tons, is lifted by crane using 220 tons of loop wheel machine two-shippers, and 4 suspension centres, hoisting point position is arranged：Leave steel box-girder most
Outer edge 2m；
(2) position of centre of gravity of every steel box-girder is determined using BIM technology；
(3) for the center of gravity of steel box-girder on the vertical plane where the line at both ends lifting lug midpoint, error is no more than 10mm；
(4) lifting lug should penetrate, and weld bead height must not be less than 24mm；
(5) lifting lug must not be located in the top plate at the partition position of steel box-girder；
(6) lifting lug position sets stiffener reinforcing.
7. getting higher change indulges horizontal curve steel box girder construction method as described in claim 1, it is characterised in that：In the step 8
Steel box-girder be welded and fixed including：
(1) steel box-girder is connected using full weldering, longitudinal from span centre to both ends, is laterally symmetrically carried out from center line to both sides；
(2) top plate for first welding steel box-girder welds the bottom plate of steel box-girder, the web of rear steel box-girder again；
(3) top plate uses top plate following table face paste ceramic substrate, welder to be welded in cover top surface, and welding sequence is from centre
It is welded toward both sides；
(4) using ceramic substrate is pasted outside the enclosure, welder welds in babinet for web welding, and welding sequence is two Welders
People is symmetrically welded；
(5) bottom plate uses bottom plate following table face paste ceramic substrate, welder to be welded in babinet, and welding sequence is from intermediate past
It welds on both sides；
(6) control of welding joining temperature is at 20 DEG C ± 5 DEG C, and the time selects 3:00 AM at 9 points in the morning；
(7) temperature difference amendment, weld contraction amendment, the amendment of section mouth seam, capital spacing amendment are completed at same section.
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|---|---|---|---|
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| CN109594474A (en) * | 2018-10-29 | 2019-04-09 | 合肥市公路桥梁工程有限责任公司 | A kind of limited bracket construction method of Long span S-shaped steel box-girder |
| CN110205947A (en) * | 2019-07-06 | 2019-09-06 | 中铁二十五局集团第五工程有限公司 | A kind of overline bridge steel box girder construction method |
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| CN115162182A (en) * | 2022-07-20 | 2022-10-11 | 中国五冶集团有限公司 | Cantilever type steel box girder high-precision cable hoisting construction method |
| CN115930927A (en) * | 2023-03-09 | 2023-04-07 | 中铁六局集团天津铁路建设有限公司 | Concrete bridge linear control measuring device |
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Application publication date: 20180720 |