CN109702364A - A kind of ultra-wide steel box-girder transverse multi-section division assembling method - Google Patents
A kind of ultra-wide steel box-girder transverse multi-section division assembling method Download PDFInfo
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- CN109702364A CN109702364A CN201811603613.9A CN201811603613A CN109702364A CN 109702364 A CN109702364 A CN 109702364A CN 201811603613 A CN201811603613 A CN 201811603613A CN 109702364 A CN109702364 A CN 109702364A
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Abstract
The present invention relates to a kind of ultra-wide steel box-girder transverse multi-sections to divide assembling method, steel box-girder includes top plate and bottom plate, diaphragm plate, midfeather, web, tuyere unit, tuyere unit includes outboard partition, air duct is formed between the outboard partition and web, the ventilation opening being connected with air duct is provided on partition on the outside, ultra-wide steel box-girder transverse multi-section divides assembling method using the manufacture of multi-segmental continuous coupling and two processes of preassembling, and by the cooperation of assembled moulding bed and SURVEYING CONTROL NETWORK, to realize long line method assembly.The present invention has the advantages that using this section assembling method of the invention, using the manufacture of multi-segmental continuous coupling and two processes of preassembling, and pass through the cooperation of assembled moulding bed and SURVEYING CONTROL NETWORK, the linear production of assembled moulding bed and beam section assembly are all on the basis of the SURVEYING CONTROL NETWORK pre-set, ensure that steel box girder assembling is linear and interface precision, so as to control steel box-girder assembly precision well.
Description
Technical field
The present invention relates to steel box-girder field, in particular to a kind of ultra-wide steel box-girder transverse multi-section divides assembling method.
Background technique
Steel box-girder generally passes through all-welded mode by top plate and bottom plate, web and diaphragm plate, midfeather and ribbed stiffener etc.
It is formed by connecting.Wherein top plate is the cross bridge floor board being made of cover board and longitudinal stiffener.
The thickness of more typical each plate of steel box-girder can are as follows: cover sheet thickness 14mm, longitudinally U-shaped rib thickness 6mm, upper mouth width
320mm, lower mouth width 170mm, high 260mm, spacing 620mm；Bottom plate thickness 10mm, longitudinally U-shaped ribbed stiffener；Skew web plate thickness 14mm, in
Web thickness 9mm；Tabula plate spacing 4.0m, thickness 12mm；2~3.5m of deck-molding.
Ntitorque steel plate box-girder be in engineering frequently with structure type be research tabula plate spacing to simple under Concentrated load
The influence of branch steel box-girder distortion compares it under Concentrated load by the way that the simply supported steel box girder of different number diaphragm plate is arranged
Distortion effect and rigid torsion effect, obtain maximum distortion effect with the change curve of diaphragm plate quantity on box girder web top
End apply load, by distortion, rigid torsion, four kinds of operating conditions of symmetric curvature and eccentric load using load decomposition method into
Row calculates.
Existing a steel box-girder, width beam overall reach 40m, are limited by highway transportation condition, it is necessary to by steel box-girder transverse direction
Multiple segments are broken as, to achieve the purpose that convenient transportation.In this case, for the single segment of steel box-girder not at box-shaped, rigidity is small,
Deformation is not easy to control；And transverse and longitudinal has the multiple tracks butt weld such as top plate and bottom plate, web, diaphragm plate, midfeather, docks collar extension ruler
It is very little to require finely.
Summary of the invention
It divides and spells the technical problem to be solved in the present invention is to provide a kind of ultra-wide steel box-girder transverse multi-section that assembly precision is high
Dress method.
In order to solve the above technical problems, the technical solution of the present invention is as follows: a kind of ultra-wide steel box-girder transverse multi-section divides assembly
Method, steel box-girder include a top plate, the bottom plate for cooperating and being distributed up and down, are additionally provided between top plate and bottom plate several
Laterally and the diaphragm plate of column distribution and longitudinal and column distribution midfeather, and diaphragm plate and midfeather are in grid-like distribution,
The two sides of each diaphragm plate have a pair of of web, tuyere unit are additionally provided on the outside of web, tuyere unit includes lateral septal
Plate forms air duct between the outboard partition and web, be provided with the ventilation opening being connected with air duct on partition on the outside, wound
New point is: ultra-wide steel box-girder transverse multi-section divides assembling method using the manufacture of multi-segmental continuous coupling and two works of preassembling
Sequence, and by the cooperation of assembled moulding bed and SURVEYING CONTROL NETWORK, to realize long line method assembly.
Further, multi-segmental continuous coupling manufacturing process are as follows: firstly, by steel box-girder along being along the bridge divided into
Then several segments produce bottom plate, top plate, tabula needed for constituting each segment respectively further according to ready-portioned each segment
Plate, midfeather, web, outboard partition, and be end bay beam section for outermost two segments, by bottom plate, top plate, tabula
Plate, web, outboard partition composition, for each segment being located between two end bay beam-ends, then by bottom plate, top plate, diaphragm plate,
Midfeather composition；
The preassembling process are as follows: firstly, being successively laid with the bottom plate for constituting each segment in sequence on moulding bed, so
Afterwards, corresponding diaphragm plate, midfeather are erected respectively on each bottom plate, then assembles web, finally assembles top plate, is completed pre-splicing
Dress.
Further, in preassembling process, for two sides end bay beam section when assembling, need first to assemble outside
Partition, then web is assembled, finally assemble diaphragm plate.
Further, in preassembling process, for top plate first by technique requirement in two assembled tires before upper assembled moulding bed
Plate is combined on frame two-by-two, then carries out integral assembling, when assembling top, bottom plate plate or plate unit, laterally to indulge base on plate unit
Line is positioning datum, welding contracted quantity is reserved, with the adjacent U in template repetition measurement adjacent plate unit weld seam two sides with welding contracted quantity
The center of shape rib or rib of slab is away from longitudinal direction is on the basis of horizontal baseline, priority control reference edge edges of boards straightness and groove unfitness of butt joint, together
When the preset vertical reversible deformation when assembling positioning.
Further, the assembled moulding bed makees moulding bed spelling according to the given steel box-girder manufacturing line shape of design in production
Wiring shape, and consider that steel box-girder is shunk the deformation for being influenced and being occurred with gravity by welding, laterally it is arranged on appropriate in moulding bed
Camber, moulding bed basis must have enough bearing capacities, it is ensured that and sedimentation≤1mm in use, moulding bed will have enough rigidity,
It avoids deforming in use.
Further, when SURVEYING CONTROL NETWORK is arranged, firstly, beam section SURVEYING CONTROL NETWORK, measurement point base is arranged in consolidation shed
Plinth must be secured, guarantees sedimentation≤1mm, and at moulding bed both ends, elevation is arranged in setting Longitudinal Base mark tower and ground sample benchmark, surrounding
Datum mark, as steel box-girder geometric dimension positioning datum, the datum mark for constituting each coordinate system must not be less than 4, and periodically
It is detected, is converted by the SURVEYING CONTROL NETWORK coordinate system with site coordinate system is set up, pass through control top during assembled
The relativeness positioning assembling of plate, bottom plate, lower boom reference line and SURVEYING CONTROL NETWORK.
Further, under every round beam section after tire, Ying Chongxin detects assembled moulding bed on the basis of SURVEYING CONTROL NETWORK,
Detection record is carried out, the assembly of next one can be carried out after confirmation is qualified.
Further, the steel box-girder need to control emphatically the following during assembly:
A) tabula plate spacing controls: locating piece is arranged on assembled moulding bed, it is ensured that diaphragm plate quick and precisely positions；
B) width controls: strict control top plate and bottom plate, lower edge block assembly center size are adjusted using welded gaps and are spelled
Plus-minus tolerance is filled, prevents from adding up to form biggish scale error, influences assembly, after the completion of assembly welding, required according to technique
Scribing line cutting, guarantees width dimensions；
C) verticality, rectangle control: web verticality, case mouth rectangle, lower edge block rectangle are priority control size, are spelled
Monitoring is paid attention to during dress；
D) top plate and bottom plate first two spell one connect width can preset appropriate reversible deformation, to guarantee flatness and U rib spacing；
E) precisely in place: should all to be positioned during assembled with reference edge, reference line, center line, and should be with other dimension correctings
Core guarantees that every step is assembled precisely in place；
F) steel box-girder totality linear measurement controls: after the completion of steel box girder segment is assembled, using total station in SURVEYING CONTROL NETWORK
Interior to carry out three-dimensional coordinate acquisition to monitoring point on steel box-girder, steel box-girder top plate, case mouth are equipped with measurement monitoring point；
G) longitudinal linear detection: the theoretical elevation of at longitudinal centre line and edge is subject in bridge linear inspection, measurement
Each beam section both ends monitoring point three-dimensional coordinate；
H) beam section distortion detection: by acquiring each beam section both ends monitoring point three-dimensional coordinate, judge the horizontality of each beam section
And distorting event；
I) steel box-girder beam length detects: on the basis of the horizontal baseline of each beam section, measuring the accumulation length of each beam section, determines subsequent beam
The compensation rate of section, is converted by coordinate system, compared with theoretical coordinate value, calculates deviation.
Further, for linear steel box-girder devious, really reflected by computer modeling the beam section with it is adjacent
The positional relationship of beam section carries out reset amendment to it in a computer, to obtain the beam section and the true interface of adjacent beam section
Characteristic, and then determine the true angle between beam section, and correct to it, it is restored to it when bridge location is set up and theoretical linear phase
Matching；The steel plate unfitness of butt joint and longitudinal stiffener merging precision for checking steel box-girder interface, to the portion required beyond acceptance criteria
Amendment is made in position, while determining that steel box-girder matches the surplus cutting data of cut end according to measurement controlling computer correction result, it is ensured that
Welded gaps of the steel box-girder when bridge location is set up are suitable, and welding quality is effectively ensured.
The present invention has the advantages that being manufactured using this section assembling method of the invention using multi-segmental continuous coupling
With two processes of preassembling, and by the cooperation of assembled moulding bed and SURVEYING CONTROL NETWORK, the linear production of assembled moulding bed and beam section are assembled
All on the basis of the SURVEYING CONTROL NETWORK pre-set, it is ensured that steel box girder assembling is linear and interface precision, so as to fine
Control steel box-girder assembly precision.
Plate is first combined on two spelling moulding beds by technique requirement before upper tire for top plate two-by-two, then carries out integral assembling,
The general assembly moulding bed time is occupied so as to reduce, shortens the general assembly period, while reducing transverse weld shrinkage.
After tire under every round beam section, Ying Chongxin detects moulding bed on the basis of SURVEYING CONTROL NETWORK, carries out detection
Record can carry out the assembly of next one after confirmation is qualified, good also for that can provide for whole assembly precision
Basis.
The preset vertical reversible deformation when assembling positioning guarantees plate flatness also for welding deformation is reduced.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1-Fig. 4 is the preassembling flow chart that ultra-wide steel box-girder transverse multi-section divides assembling method in the present invention.
Fig. 5 is the setting schematic diagram of assembled moulding bed side datum mark in the present invention.
Fig. 6 is steel box girder assembling reference line schematic diagram in the present invention.
Fig. 7 is steel box-girder test point schematic diagram in the present invention.
Fig. 8 is that steel box-girder shows shape deviation reparation schematic diagram in the present invention.
Specific embodiment
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among the embodiment described range.
Steel box-girder includes a top plate, the bottom plate for cooperating and being distributed up and down, is additionally provided between top plate and bottom plate
Several transverse directions and the diaphragm plate of column distribution and longitudinal and column distribution midfeather, and diaphragm plate and midfeather are in grid-like point
Cloth has a pair of of web in the two sides of each diaphragm plate, tuyere unit is additionally provided on the outside of web, and tuyere unit includes outer
Side partition forms air duct between the outboard partition and web, be provided with the ventilation opening being connected with air duct on partition on the outside.
Ultra-wide steel box-girder transverse multi-section of the invention divides assembling method using the manufacture of multi-segmental continuous coupling and preassembling
Two processes, and by the cooperation of assembled moulding bed and SURVEYING CONTROL NETWORK, to realize long line method assembly.
It is linear that assembled moulding bed makees moulding bed assembly in production, according to the given steel box-girder manufacturing line shape of design, and considers
Steel box-girder is shunk the deformation for being influenced and being occurred with gravity by welding, and camber appropriate, moulding bed basis is laterally arranged in moulding bed
There must be enough bearing capacities, it is ensured that sedimentation≤1mm in use, moulding bed there will be enough rigidity, avoid using
It is deformed in journey.
In SURVEYING CONTROL NETWORK setting, firstly, beam section SURVEYING CONTROL NETWORK is arranged in consolidation shed, measurement point basis must jail
Gu guaranteeing sedimentation≤1mm, at moulding bed both ends, measurement of higher degree benchmark is arranged in setting Longitudinal Base mark tower and ground sample benchmark, surrounding
Point as shown in figure 5, the datum mark for constituting each coordinate system must not be less than 4, and is determined as steel box-girder geometric dimension positioning datum
Phase is detected, and is converted by the SURVEYING CONTROL NETWORK coordinate system with site coordinate system is set up, passes through control during assembled
The relativeness of top plate and bottom plate, lower boom reference line and SURVEYING CONTROL NETWORK positions assembling, as shown in Figure 6.
Multi-segmental continuous coupling manufacturing process are as follows: firstly, by steel box-girder along several segments are along the bridge divided into, then
Produce bottom plate, top plate, diaphragm plate, midfeather, abdomen needed for constituting each segment respectively further according to ready-portioned each segment
Plate, outboard partition, and be end bay beam section for outermost two segments, by bottom plate, top plate, diaphragm plate, web, lateral septal
Board group bottom plate, top plate, diaphragm plate, midfeather at for each segment being located between two end bay beam-ends, being then made of；
Preassembling process are as follows: firstly, being successively laid with the bottom plate for constituting each segment in sequence on moulding bed, such as Fig. 1
It is shown, then, erect corresponding diaphragm plate, midfeather respectively on each bottom plate, as shown in Fig. 2, web is assembled again, such as Fig. 3
It is shown, top plate is finally assembled, as shown in figure 4, completing preassembling, beam section preassembling is placed into after examining qualified and sanding, coating
It is to be shipped to deposit beam field.
In preassembling process, for two sides end bay beam section when assembling, need first to assemble outboard partition, then group
Web is filled, diaphragm plate is finally assembled.
In preassembling process, top plate is first spelled on two assembled moulding beds by technique requirement two-by-two before upper assembled moulding bed
At plate, then integral assembling is carried out, plate is first combined into two-by-two on two spelling moulding beds by technique requirement before upper tire for top plate, then
Integral assembling is carried out, the general assembly moulding bed time is occupied so as to reduce, shortens the general assembly period, while reducing transverse weld contraction
Amount.
When assembling top, bottom plate plate or plate unit, laterally to indulge baseline on plate unit as positioning datum, reserves welding and shrink
Amount, with the center of the adjacent U-shaped rib in template repetition measurement adjacent plate unit weld seam two sides or rib of slab with welding contracted quantity away from, it is longitudinal with
On the basis of horizontal baseline, priority control reference edge edges of boards straightness and groove unfitness of butt joint, and meanwhile it is preset vertical anti-when assembling positioning
Deformation guarantees plate flatness also for welding deformation is reduced, and reversible deformation is encircleed in advance to be completed in assembling, must not be in weld seam
Recur top reversible deformation after the completion of bottoming.
Under every round beam section after tire, Ying Chongxin detects assembled moulding bed on the basis of SURVEYING CONTROL NETWORK, carries out detection
Record can carry out the assembly of next one after confirmation is qualified, in this manner also for can be whole assembling
Precision provides good basis.
Steel box-girder need to control emphatically the following during assembly:
1) tabula plate spacing controls: locating piece is arranged on assembled moulding bed, it is ensured that diaphragm plate quick and precisely positions.
2) width controls: strict control top plate and bottom plate, lower edge block assembly center size are adjusted using welded gaps and are spelled
Plus-minus tolerance is filled, prevents from adding up to form biggish scale error, influences assembly, after the completion of assembly welding, required according to technique
Scribing line cutting, guarantees width dimensions.
3) verticality, rectangle control: web verticality, case mouth rectangle, lower edge block rectangle are priority control size, are spelled
Monitoring is paid attention to during dress.
4) top plate and bottom plate first two spell one connect width can preset appropriate reversible deformation, to guarantee flatness and U rib spacing.
5) precisely in place: should all to be positioned during assembled with reference edge, reference line, center line, and should be with other dimension correctings
Core guarantees that every step is assembled precisely in place.
6) steel box-girder totality linear measurement controls: after the completion of steel box girder segment is assembled, using total station in SURVEYING CONTROL NETWORK
Interior to carry out three-dimensional coordinate acquisition to monitoring point on steel box-girder, steel box-girder top plate, case mouth are equipped with measurement monitoring point.
7) longitudinal linear detection: the theoretical elevation of at longitudinal centre line and edge is subject in bridge linear inspection, measurement
Each beam section both ends monitoring point three-dimensional coordinate, as shown in Figure 7.
8) beam section distortion detection: by acquiring each beam section both ends monitoring point three-dimensional coordinate, judge the horizontality of each beam section
And distorting event.
9) steel box-girder beam length detects: on the basis of the horizontal baseline of each beam section, measuring the accumulation length of each beam section, determines subsequent beam
The compensation rate of section, is converted by coordinate system, compared with theoretical coordinate value, calculates deviation.
Schematic diagram as shown in Figure 8 is really reflected it is found that for linear steel box-girder devious by computer modeling
The positional relationship of the beam section and adjacent beam section carries out reset amendment to it in a computer, to obtain the beam section and adjacent beams
The true interface features of section, and then determine the true angle between beam section, and correct to it, it is restored to it when bridge location is set up
Linear match with theoretical；The steel plate unfitness of butt joint and longitudinal stiffener merging precision for checking steel box-girder interface, to beyond examination
Amendment is made at the position of standard requirements, while determining that steel box-girder is cut with the surplus of cut end according to measurement controlling computer correction result
Cut data, it is ensured that welded gaps of the steel box-girder when bridge location is set up are suitable, and welding quality is effectively ensured.
In by the above process, it is also necessary to which the precision of manufacture tolerance and assembly to the steel box-girder of steel box-girder carries out
It examines, inspection preferably carries out under conditions of influence without sunshine, releases the interim connection between moulding bed, is in free state, and answer
There is detailed inspection record.
It is as follows that steel box-girder manufactures tolerance:
The tolerance of top plate length and floor length is controlled in ± 2mm, measurement method are as follows: with the inspection of beam section both ends
On the basis of line, length is measured using steel disk ruler, closes up segment length and is determined according to actual measured results.
Tolerance at beam section diaphragm plate is controlled in ± 4mm, for the permission at beam section end midfeather, web
Deviation is controlled in ± 2mm, measurement method are as follows: using steel disk ruler measurement height.
The tolerance of top plate width and baseplate width is controlled in ± 4mm, for the tolerance of outer width at tuyere
Control is in ± 2mm, measurement method are as follows: measures width in beam section two-port steel disk ruler.
The tolerance of cross-section face diagonal difference is controlled in≤4mm, measurement method are as follows: diagonal with the measurement of steel disk ruler
Line,
The tolerance of centerline deviation is controlled in≤2mm, measurement method are as follows: measured with ceiling hammer and laser.
The tolerance of two suspension centre transfers is controlled in ± 5mm, the tolerance control longitudinally displaced for two suspension centres
In ± 2mm, measurement method are as follows: use steel disk ruler and level measurement.
The tolerance of top plate length and floor length is controlled in ± 2mm, measurement method are as follows: with the inspection of beam section both ends
On the basis of line, length is measured using steel disk ruler, closes up segment length and is determined according to actual measured results.
For lower edge purlin away from the tolerance control longitudinally displaced with two lower-chord panel points in ± 2mm, measurement method are as follows: use steel
Disk ruler and level measurement.
The tolerance of side sway is controlled in f≤5.0mm, measurement method are as follows: use Steel Ruler after drawing steel wire.
The tolerance of quadrangle level height difference is controlled in ± 3mm, measurement method are as follows: measured with level.
The tolerance of 1/2 diagonal line difference is controlled in < 8mm, measurement method are as follows: the measurement of steel disk ruler.
For deck transverse slope tolerance control ± 0.1%, measurement method are as follows: measured with level.
The assembled required precision of steel box-girder examination:
The tolerance of beam section height is controlled in ± 2mm, the tolerance of beam section width is controlled in ± 5mm,
The tolerance control of suspension centre adjacent for two, lower-chord panel point advance is in ± 3mm, the method for inspection are as follows: is surveyed with steel disk ruler, horizontal ruler
Amount.
It is preassembling beam section quantity that the tolerance of preassembling length, which is controlled in 2*Nmm, N, measurement both ends beam section
Two anchor tie plate spacing, the method for inspection are as follows: use steel disk ruler, total station survey.
For be completed the tolerance control of the preassembling cumulative length length of preassembling beam section (cumulative) ±
15mm, the method for inspection are as follows: detected by calculating.
The tolerance of beam section misalignment (beam section center line and truss centerline deviation) is controlled in≤1mm,
The method of inspection are as follows: measured with laser.
The tolerance of longitudinal vertical curve (absolute altitude along bridge center line survey partition) is controlled in ± 3mm, the method for inspection
Are as follows: it is measured with level.
The tolerance of longitudinal rib straightness f (at beam section matched interfaces) is controlled in≤1.5mm, the method for inspection are as follows: use
Steel Ruler measurement.
The tolerance of side sway f is controlled in 3+0.1L, and any 20m surveys f < 6mm, the bridge floor line of centres in long and exists
Three sections of trial assembly length of deviation L (m) in plane, in terms of m, side sway≤5mm of single hop box beam, the method for inspection are as follows: use cord holder, steel
The measurement of silk thread (theodolite) Steel Ruler.
The tolerance of left and right branch point height difference (left and right difference of height) is controlled in≤3mm, the method for inspection are as follows: Steel Ruler
Measurement.
The tolerance of top plate quadrangle level height difference (left and right difference of height) is controlled in≤4mm, the method for inspection are as follows: use flat
Platform, level meter, Steel Ruler measurement.
The tolerance of distortion (every section is subject at two side partitions) is controlled and is no more than 1mm at every meter, and every section≤
8mm, the tolerance control of suspension centre adjacent for two, lower-chord panel point advance is in ± 3mm, the method for inspection are as follows: uses steel disk ruler, level
Ruler measurement.
The tolerance of tuyere straightness is controlled in L/2000, and≤5mm, the method for inspection are as follows: use theodolite, steel plate
Ruler measurement.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation
It is merely illustrated the principles of the invention described in book, without departing from the spirit and scope of the present invention, the present invention also has
Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention
It is defined by the appending claims and its equivalent thereof.
Claims (9)
1. a kind of ultra-wide steel box-girder transverse multi-section divides assembling method, steel box-girder includes the top for cooperating and being distributed up and down
Plate, a bottom plate are additionally provided with the diaphragm plate of several transverse directions and column distribution and longitudinal and column distribution between top plate and bottom plate
Midfeather, and diaphragm plate and midfeather are in grid-like distribution, have a pair of of web in the two sides of each diaphragm plate, in the outer of web
Side is additionally provided with tuyere unit, and tuyere unit includes outboard partition, air duct is formed between the outboard partition and web, on the outside
The ventilation opening being connected with air duct is provided on partition, it is characterised in that: ultra-wide steel box-girder transverse multi-section divides assembling method and adopts
With multi-segmental continuous coupling manufacture with two processes of preassembling, and by the cooperation of assembled moulding bed and SURVEYING CONTROL NETWORK, thus real
Existing long line method is assembled.
2. ultra-wide steel box-girder transverse multi-section according to claim 1 divides assembling method, it is characterised in that:
Multi-segmental continuous coupling manufacturing process are as follows: firstly, by steel box-girder along several segments are along the bridge divided into, then
Produce bottom plate, top plate, diaphragm plate, midfeather, abdomen needed for constituting each segment respectively further according to ready-portioned each segment
Plate, outboard partition, and be end bay beam section for outermost two segments, by bottom plate, top plate, diaphragm plate, web, lateral septal
Board group bottom plate, top plate, diaphragm plate, midfeather at for each segment being located between two end bay beam-ends, being then made of；
The preassembling process are as follows: firstly, be successively laid with the bottom plate for constituting each segment in sequence on moulding bed, then,
It erects corresponding diaphragm plate, midfeather respectively on each bottom plate, then assembles web, finally assemble top plate, complete preassembling.
3. ultra-wide steel box-girder transverse multi-section according to claim 2 divides assembling method, it is characterised in that: in preassembling work
In sequence, need first to assemble outboard partition when assembling for the end bay beam section of two sides, then assemble web, finally assembling is horizontal
Partition.
4. ultra-wide steel box-girder transverse multi-section according to claim 2 divides assembling method, it is characterised in that: in preassembling work
In sequence, plate is first combined into two-by-two on two assembled moulding beds by technique requirement before upper assembled moulding bed for top plate, then carry out entirety
Assembly when assembling top, bottom plate plate or plate unit, laterally to indulge baseline on plate unit as positioning datum, reserves welding contracted quantity,
With the center of the adjacent U-shaped rib in template repetition measurement adjacent plate unit weld seam two sides or rib of slab with welding contracted quantity away from longitudinal with cross
On the basis of baseline, priority control reference edge edges of boards straightness and groove unfitness of butt joint, while the preset vertical contravariant when assembling positioning
Shape.
5. ultra-wide steel box-girder transverse multi-section according to claim 1 divides assembling method, it is characterised in that: the assembly tire
It is linear that frame makees moulding bed assembly in production, according to the given steel box-girder manufacturing line shape of design, and considers that steel box-girder is received by welding
Contracting and the influence of gravity and the deformation that occurs, are laterally arranged camber appropriate in moulding bed, moulding bed basis must have enough hold
Carry power, it is ensured that sedimentation≤1mm in use, moulding bed there will be enough rigidity, avoid deforming in use.
6. ultra-wide steel box-girder transverse multi-section according to claim 1 divides assembling method, it is characterised in that: controlled in measurement
When net setting, firstly, beam section SURVEYING CONTROL NETWORK is arranged in consolidation shed, measurement point basis must be secured, guarantees sedimentation≤1mm,
Longitudinal Base mark tower and ground sample benchmark is arranged in moulding bed both ends, and measurement of higher degree datum mark is arranged in surrounding, as steel box-girder dimensioning
Very little positioning datum, the datum mark for constituting each coordinate system must not be less than 4, and are periodically detected, and sat by the SURVEYING CONTROL NETWORK
Mark system is converted with site coordinate system is set up, and is controlled during assembled by controlroof, bottom plate, lower boom reference line and measurement
The relativeness of system net positions assembling.
7. ultra-wide steel box-girder transverse multi-section according to claim 1 divides assembling method, it is characterised in that: every round beam section
After lower tire, Ying Chongxin detects assembled moulding bed on the basis of SURVEYING CONTROL NETWORK, carries out detection record, can after confirmation is qualified
Carry out the assembly of next one.
8. ultra-wide steel box-girder transverse multi-section according to claim 1 divides assembling method, it is characterised in that: the steel box-girder
During assembly, the following need to be controlled emphatically:
A) tabula plate spacing controls: locating piece is arranged on assembled moulding bed, it is ensured that diaphragm plate quick and precisely positions；
B) width controls: strict control top plate and bottom plate, lower edge block assembly center size, is adjusting assembly just using welded gaps
Negative common difference prevents from adding up to form biggish scale error, influences assembly, after the completion of assembly welding, requires to cross according to technique
Cutting guarantees width dimensions；
C) verticality, rectangle control: web verticality, case mouth rectangle, lower edge block rectangle are priority control size, assembled mistake
Monitoring is paid attention in journey；
D) top plate and bottom plate first two spell one connect width can preset appropriate reversible deformation, to guarantee flatness and U rib spacing；
E) precisely in place: should all be with reference edge, reference line, center line positioning during assembled, and should be protected with other dimensional checks
It is assembled precisely in place to demonstrate,prove every step；
F) steel box-girder totality linear measurement controls: right in SURVEYING CONTROL NETWORK using total station after the completion of steel box girder segment is assembled
Monitoring point carries out three-dimensional coordinate acquisition on steel box-girder, and steel box-girder top plate, case mouth are equipped with measurement monitoring point；
G) longitudinal linear detection: the theoretical elevation of at longitudinal centre line and edge is subject in bridge linear inspection, measures each beam
Section both ends monitoring point three-dimensional coordinate；
H) beam section distortion detection: by acquiring each beam section both ends monitoring point three-dimensional coordinate, judge the horizontality and torsion of each beam section
Bent situation；
I) steel box-girder beam length detects: on the basis of the horizontal baseline of each beam section, measuring the accumulation length of each beam section, determines subsequent beam section
Compensation rate is converted by coordinate system, compared with theoretical coordinate value, calculates deviation.
9. ultra-wide steel box-girder transverse multi-section according to claim 8 divides assembling method, it is characterised in that: have for linear
The steel box-girder of deviation really reflects the positional relationship of the beam section Yu adjacent beam section by computer modeling, right in a computer
It carries out reset amendment, to obtain the beam section and the true interface features of adjacent beam section, and then determines true between beam section
Angle, and correcting to it is restored to it when bridge location is set up and theory is linear matches；Check the steel plate of steel box-girder interface
Unfitness of butt joint and longitudinal stiffener merging precision are made amendment to the position required beyond acceptance criteria, while being controlled according to measurement
Computer correction result determines that steel box-girder matches the surplus cutting data of cut end, it is ensured that welded gaps of the steel box-girder when bridge location is set up
Properly, welding quality is effectively ensured.
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| CN114799621A (en) * | 2022-02-22 | 2022-07-29 | 中铁宝桥（扬州）有限公司 | Large bridge steel box girder block assembling and welding process |
| CN115070245A (en) * | 2022-06-23 | 2022-09-20 | 中铁山桥集团有限公司 | Manufacturing method of UHPC steel box composite beam |
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Application publication date: 20190503 |