CN105040567B - Interchange steel bridge and manufacture method thereof - Google Patents
Interchange steel bridge and manufacture method thereof Download PDFInfo
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- CN105040567B CN105040567B CN201510225435.0A CN201510225435A CN105040567B CN 105040567 B CN105040567 B CN 105040567B CN 201510225435 A CN201510225435 A CN 201510225435A CN 105040567 B CN105040567 B CN 105040567B
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Abstract
The invention relates to an interchange steel bridge, and particularly to the interchange steel bridge and a manufacture method thereof. The interchange steel bridge belongs to the field of steel structures. The interchange steel bridge comprises a base plate unit, baffle plate units, longitudinal web units, a top plate unit and a cantilever unit. The longitudinal web plates are arranged above the base plate unit. Each longitudinal web plate is internally provided with a baffle plate unit. The top plate unit is arranged above the baffle plate units and the longitudinal web units. One side of the top plate unit is provided with the cantilever unit. The manufacture method comprises the following steps of laying a supporting moulding bed, testing the moulding bed, forming the interchange steel bridge, splicing the baffle plate unit at a middle position, performing one-time splicing on the longitudinal web plate at the middle position, splicing the baffle plate units at sides, performing secondary splicing on the longitudinal web units at the sides, splicing the top plate unit, splicing the cantilever unit, and performing quality detection on a steel bridge box girder. The interchange steel bridge and the manufacture method thereof have advantages of compact structure, high splicing precision, effective splicing strength improvement, and effective line type improvement of the manufactured bridge.
Description
Technical field
The present invention relates to a kind of grade separation steel bridge, more particularly, to a kind of interchange steel bridge and preparation method thereof, belong to steel knot
Structure field.
Background technology
Steel bridge unit of the prior art cannot be produced by batch, and the highway steel bridge unit that each is produced has individual character
Difference, it is impossible to make multiple highway steel bridge units carry out good splicing, leads to the reduction of serviceability and security performance.
Content of the invention
The present invention mainly solves the deficiencies in the prior art, provides a kind of compact conformation, is entered by support jig
The precision molding of row steel bridge, meets a kind of interchange steel bridge of batch production requirements and preparation method thereof.
The above-mentioned technical problem of the present invention is mainly addressed by following technical proposals：
A kind of interchange steel bridge, including bottom board unit, separator unit, indulges web unit, top plate unit and chooses arm unit,
The top of described bottom board unit is provided with vertical web unit, is provided with separator unit in described vertical web unit, described dividing plate
The top of unit and vertical web unit is provided with top plate unit, and a side of described top plate unit is provided with chooses arm unit.
Preferably, described bottom board unit includes the base plate in dislocation splicing distribution, described base plate is provided with base plate I
Type stiffening rib；
Described vertical web unit includes equally distributed vertical web, and the bottom of described vertical web is connected to adjacent bottom plates
Between I type stiffening rib；
Described separator unit includes median septum and side partition, be provided between described vertical web uniform intervals distribution in every
Plate and side partition, described median septum is interspersed with side partition, and the median septum of cross direction profiles is in same linear distribution, horizontal
It is in same linear distribution to the side partition of distribution, the bottom of described median septum and side partition is respectively equipped with and is added with base plate I type
The dividing plate bottom increment of strength bar phase clamping positioning, described median septum is respectively equipped with dividing plate top increment with the top of side partition；
Described top plate unit includes the top board in dislocation splicing distribution, and the bottom of described top board is provided with and dividing plate top
The fixing top board fixing end of increment, vertical web top phase；
Described arm unit of choosing includes choosing arm plate, and described chooses the outer wall that arm plate is located at top plate unit, and described chooses arm plate
The top of top and top board be in that same horizontal line is distributed.
A kind of preparation method of interchange steel bridge, is carried out according to the following steps：
（1）, the laying of support jig：
1st, figure is arranged according to grade separation steel bridge support jig, release projection line and the position line of support jig on the ground；
Support jig adjacent transverse centre of location line should control the model in ± 0.5mm along the longitudinal spacing deviation of grade separation steel bridge
In enclosing；
2nd, the ground line-transect setting moulding bed according to support jig, first arranges the base of support jig, for preventing support jig
The overall line style of moving influence grade separation steel bridge, base is connected using studs with ground；
3rd, support jig base setting and after the assay was approved, then by the centre of location line of the horizontal stroke on base, longitudinal beam
Migrate to the upper surface of base, then the projected boundary line according to centre of location line and support jig, longitudinally fixed successively along steel bridge
Position is horizontal, longitudinal beam, and adjusts centrage and be welded and fixed to after overlap, fixing after the center distance deviation of adjacent transverse beam must not
It is more than ± 1mm；
4th, after the completion of the transverse beam of support jig and longitudinal beam are laid on request, check whether firm it should be ensured that steel bridge is spelled
Will not be moved during dress；Then detection, the flatness of adjustment moulding bed panel supporting surface, flatness tolerance is little
In 5mm；
5th, support jig design drawing requires, and releases moulding bed panel position line in transverse beam, fixed with moulding bed panel
On the basis of bit line, set gradually moulding bed panel, panel takes CNC cutting, must add through accurate with bridge base plate contact surface
Work；
The setting of fetal membrane panel should meet claimed below：Laterally line is consistent with the bridge lateral gradient, is 2% horizontal wall inscription；Longitudinally
Line becomes bridge line style for steel bridge；After meeting the requirements, fixation is welded on crossbeam；
（2）, moulding bed detection：
After the completion of the support jig laying of grade separation steel bridge, carry out each observing and controlling point coordinates on moulding bed panel using total powerstation
Detection, and records measurement data, then will measure coordinate Value Data and import computer, show that steel bridge moulding bed arranges line style, and sets
The one-tenth bridge line style that meter requires is compared, and when there is deviation, local panel is adjusted, until completely the same satisfaction sets
Count into bridge line style to require；
（3）, grade separation steel bridge molding：
1st, bottom board unit is assembled：After support jig assembly, the base plate checking qualified is hung on support jig successively, determine over the ground
Sample datum line, and fixed using interim Karma or spot welding, to obtain good one-tenth bridge line style after being close to moulding bed panel；
2nd, mark centrage on each base plate, and mark base plate I type stiffening rib and web cell location on the basis of centrage
Line, lays base plate I type stiffening rib successively by benchmark line position and spot welding is fixed；
3rd, adopt CO2Gas shielded arc welding, welds to base plate I type stiffening rib, symmetrical welding from the middle to both ends, is welded to the bottom of from
Stop welding at plate I type stiffening rib termination 200mm, be completely cooled down to after room temperature after weld seam, between detection base plate I type stiffening rib
Away from, the perpendicularity with base plate, at separator unit, base plate I type stiffening rib detects falling into rate and should reaching 100%, if base plate I type of model
The spacing of stiffening rib is not met technical requirements and is then corrected using local heating mode, and it is 700 DEG C～800 that temperature is corrected in heating
℃；
4th, the splicing of bottom board unit adopts CO2Gas shielded arc welding or CO2Gas shielded arc welding bottoming, Lincoln weld filling and
Capping；
Base plate splices welding sequence：The longitudinal seam of first foot plate splicing, then weld horizontally-spliced weldering, postwelding repetition measurement base plate
The spacing of I type stiffening rib is it is ensured that the rate that falls into of detection model reaches 100%；
（4）, first assembled to the separator unit of interposition：
1st, the separator unit of steel bridge box beam has steel flanged beam and two kinds of open web type, and wherein median septum is open web type, and side partition is
Steel flanged beam；
It is located at middle separator unit to divide because beam section manufactures section, breaks it into two, as requested using facing before assembly
Separator unit is linked to be entirety by time-code plate；
2nd, separator unit is hung on assembled moulding bed, after the fixed position line to assembling, positioning welding is fixed, and separator unit should be the bottom of with
Slab element is adjacent to assembling；
For ensureing the positioning stability of rear bulkhead unit and the perpendicularity with bottom board unit, need to be in separator unit two after positioning
Side adds temporary support；
（5）, first once assembled to the vertical web of interposition：
1st, assembled moulding bed will be hung on successively positioned at middle vertical web, determine to assembling position line, reference edge during longitudinal register
Concordant with bottom edge, laterally hold out against with middle diaphragm plate, qualified rear positioning welding is fixed；
2nd, the separator unit weld seam of interposition is welded：First weldering separator unit and base plate weld seam, then weldering separator unit with
Vertical web weld seam, is welded to and stops welding from top 300mm；
3rd, indulge the welding of web weld seam：First weld vertical weld seam between web and base plate, then weld splicing welding joint between vertical web,
Weld vertical weld seam between web and middle diaphragm plate afterwards；
（6）, be pointed to side again separator unit assembled：
Separator unit positioned at side is hung on assembled moulding bed successively and carries out determining spelling, laterally have 2% drain slope, and
Vertical with bottom board unit, the dividing plate top increment spacing of separator unit is corresponding with the U rib spacing of top plate unit；
（7）, be pointed to the secondary assembly of vertical web unit of side again：
1st, indulge the horizontal stroke of web unit, longitudinal register on the basis of the position line marking, and be close to vertical web unit, qualified after
Positioning welding is fixed；
2nd, the separator unit weld seam welding of opposite side：First weldering separator unit and base plate weld seam, then weld separator unit and indulge
Web unit weld seam, is welded to and stops welding from top 300mm；
3rd, the vertical web unit weld seam welding of opposite side：First weld vertical weld seam between web unit and base plate, then weld vertical abdomen
Splicing welding joint between Slab element, finally welds vertical weld seam between web unit and dividing plate；
（8）, top plate unit assembled：
1st, top plate unit assembling should meet horizontal 2% horizontal wall inscription of design and longitudinal steel bridge line style requires, during top plate unit assembling,
Some ballast blocks auxiliary can be made, so that top plate unit contacts and holds out against with diaphragm plate, web unit；
2nd, top plate unit weld seam welding：First weld internal weld seams, weld external splice weld seam afterwards.Carrying out internal weld seams welding
When, first weld seam between weldering top plate unit and vertical web unit, then weld seam between weldering top plate unit and separator unit；External splice
During weld seam welding, first weld longitudinal spliced weld seam, weld horizontally-spliced weld seam afterwards, postwelding carries out UT flaw detection on request；
（9）, to choose arm unit assembled：
Finally carry out choosing arm unit assembly, half-breadth and the 2% horizontal gradient, qualified rear welding are monitored using theodolite；
（10）, steel bridge box beam quality testing
Often directly on assembled moulding bed, carry out assembled quality examination after the completion of wheel steel bridge box beam integral assembly welding, should solve before inspection
Except the constraint to beam body for the moulding bed, box beam is made to be in free state；
The scope of examination includes：Bridge is longitudinally linear；Box beam longitudinal direction accumulation length；Distortion；Port match situation between sections；
1st, steel bridge overall wire type checking：
Line style detects：Bridge line style checks on the basis of the theoretical absolute altitude at longitudinal centre line, and each box beam two ends of detection are horizontal
Actual elevation value at dividing plate, checks the side sway of pre-splicing beam section centrage while checking linear；
Box beam distortion checks：It is by checking the left and right absolute altitude value at the diaphragm plate of each beam section two ends, judging the water of each beam section
Level state and distorting event.
2nd, between box beam port matching precision inspection：
Between box beam, port connection should check deck-molding at vertical web unit；Adjacent vertical web unit para-position deviation；Base plate is put down tiltedly
Docking corner deviation, edges of boards unfitness of butt joint, top board longitudinal rib unfitness of butt joint；
3rd, groove gap inspection：
The gap of steel box girder segment interface must strictly control, and excessive gap can increase welding contracted quantity, and gap
Too small easily cause weld seam melt impermeable.Therefore specify that reasonable groove gap is to ensure that a key factor of steel box-girder quality；
It is 6mm that this bridge gauge determines sections interface gaps minima, and its tolerance scope is 0-4mm, other that sections connects
Key element all must be launched with this；
For this reason, taking gap positioning process plate in overall package it is ensured that gap size, determine some at top, base plate
Individual gap anchor point, for clearance inspection；
If gap is less than setting, should be modified；After correction finishes, check whether the unfitness of butt joint of edges of boards is less than
1mm, finally by all data Ji Lu check tables.
The present invention provides a kind of interchange steel bridge and preparation method thereof, compact conformation, and splicing accuracy is high, and lifting is assembled strong
Degree, improves into bridge line style.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of base plate paving in the present invention；
Fig. 3 is the group welding structure schematic diagram of base plate I type stiffening rib in the present invention；
Fig. 4 is the structural representation being located at interposition separator unit in the present invention；
Fig. 5 is to be located at the structural representation that interposition indulges web unit in the present invention；
Fig. 6 is the structural representation being located at side separator unit in the present invention；
Fig. 7 is to be located at the structural representation that side indulges web unit in the present invention；
Fig. 8 is the structural representation of top board group weldering in the present invention.
Description of reference numerals：16th, horizontally-spliced weld seam；17th, longitudinal spliced weld seam.
Specific embodiment
Below by embodiment, and combine accompanying drawing, technical scheme is described in further detail.
Embodiment 1：As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, a kind of interchange steel bridge, including
Bottom board unit 1, separator unit 2, vertical web unit 3, top plate unit 4 and choose arm unit 5, the top of described bottom board unit 1 sets
There is vertical web unit 3, in described vertical web unit 3, be provided with separator unit 2, described separator unit 2 and vertical web unit 3
Top is provided with top plate unit 4, and a side of described top plate unit 4 is provided with chooses arm unit 5.
Described bottom board unit includes the base plate 6 in dislocation splicing distribution, and described base plate 6 is provided with base plate I type and puts more energy into
Bar 7；
Described vertical web unit includes equally distributed vertical web 8, and the bottom of described vertical web 8 is connected to adjacent bottom
Between plate I type stiffening rib 7；
Described separator unit includes median septum 9 and side partition 10, is provided with uniform intervals distribution between described vertical web 8
Median septum 9 and side partition 10, described median septum 9 is interspersed with side partition 10, and the median septum 9 of cross direction profiles is in always
Wire is distributed, and the side partition 10 of cross direction profiles is in same linear distribution, and the bottom of described median septum 9 and side partition 10 is respectively
It is provided with the dividing plate bottom increment 11 with base plate I type stiffening rib 7 phase clamping positioning, the top of described median septum 9 and side partition 10
It is respectively equipped with dividing plate top increment 12；
Described top plate unit includes the top board 13 in dislocation splicing distribution, and the bottom of described top board 13 is provided with and dividing plate
The fixing top board fixing end 14 of top increment 12, vertical web 8 top phase；
Described arm unit of choosing includes choosing arm plate 15, and described chooses the outer wall that arm plate 15 is located at top plate unit, and described chooses
The top of arm plate 15 is in that same horizontal line is distributed with the top of top board 13.
A kind of preparation method of interchange steel bridge, is carried out according to the following steps：
（1）, the laying of support jig：
1st, figure is arranged according to grade separation steel bridge support jig, release projection line and the position line of support jig on the ground；
Support jig adjacent transverse centre of location line should control the model in ± 0.5mm along the longitudinal spacing deviation of grade separation steel bridge
In enclosing；
2nd, the ground line-transect setting moulding bed according to support jig, first arranges the base of support jig, for preventing support jig
The overall line style of moving influence grade separation steel bridge, base is connected using studs with ground；
3rd, support jig base setting and after the assay was approved, then by the centre of location line of the horizontal stroke on base, longitudinal beam
Migrate to the upper surface of base, then the projected boundary line according to centre of location line and support jig, longitudinally fixed successively along steel bridge
Position is horizontal, longitudinal beam, and adjusts centrage and be welded and fixed to after overlap, fixing after the center distance deviation of adjacent transverse beam must not
It is more than ± 1mm；
4th, after the completion of the transverse beam of support jig and longitudinal beam are laid on request, check whether firm it should be ensured that steel bridge is spelled
Will not be moved during dress；Then detection, the flatness of adjustment moulding bed panel supporting surface, flatness tolerance is little
In 5mm；
5th, support jig design drawing requires, and releases moulding bed panel position line in transverse beam, fixed with moulding bed panel
On the basis of bit line, set gradually moulding bed panel, panel takes CNC cutting, must add through accurate with bridge base plate contact surface
Work；
The setting of fetal membrane panel should meet claimed below：Laterally line is consistent with the bridge lateral gradient, is 2% horizontal wall inscription；Longitudinally
Line becomes bridge line style for steel bridge；After meeting the requirements, fixation is welded on crossbeam；
（4）, moulding bed detection：
After the completion of the support jig laying of grade separation steel bridge, carry out each observing and controlling point coordinates on moulding bed panel using total powerstation
Detection, and records measurement data, then will measure coordinate Value Data and import computer, show that steel bridge moulding bed arranges line style, and sets
The one-tenth bridge line style that meter requires is compared, and when there is deviation, local panel is adjusted, until completely the same satisfaction sets
Count into bridge line style to require；
（5）, grade separation steel bridge molding：
1st, bottom board unit is assembled：After support jig assembly, the base plate checking qualified is hung on support jig successively, determine over the ground
Sample datum line, and fixed using interim Karma or spot welding, to obtain good one-tenth bridge line style after being close to moulding bed panel；
2nd, mark centrage on each base plate, and mark base plate I type stiffening rib and web cell location on the basis of centrage
Line, lays base plate I type stiffening rib successively by benchmark line position and spot welding is fixed；
3rd, adopt CO2Gas shielded arc welding, welds to base plate I type stiffening rib, symmetrical welding from the middle to both ends, is welded to the bottom of from
Stop welding at plate I type stiffening rib termination 200mm, be completely cooled down to after room temperature after weld seam, between detection base plate I type stiffening rib
Away from, the perpendicularity with base plate, at separator unit, base plate I type stiffening rib detects falling into rate and should reaching 100%, if base plate I type of model
The spacing of stiffening rib is not met technical requirements and is then corrected using local heating mode, and it is 700 DEG C～800 that temperature is corrected in heating
℃；
4th, the splicing of bottom board unit adopts CO2Gas shielded arc welding or CO2Gas shielded arc welding bottoming, Lincoln weld filling and
Capping；
Base plate splices welding sequence：The longitudinal seam of first foot plate splicing, then weld horizontally-spliced weldering, postwelding repetition measurement base plate
The spacing of I type stiffening rib is it is ensured that the rate that falls into of detection model reaches 100%；
（4）, first assembled to the separator unit of interposition：
1st, the separator unit of steel bridge box beam has steel flanged beam and two kinds of open web type, and wherein median septum is open web type, and side partition is
Steel flanged beam；
It is located at middle separator unit to divide because beam section manufactures section, breaks it into two, as requested using facing before assembly
Separator unit is linked to be entirety by time-code plate；
2nd, separator unit is hung on assembled moulding bed, after the fixed position line to assembling, positioning welding is fixed, and separator unit should be the bottom of with
Slab element is adjacent to assembling；
For ensureing the positioning stability of rear bulkhead unit and the perpendicularity with bottom board unit, need to be in separator unit two after positioning
Side adds temporary support；
（5）, first once assembled to the vertical web of interposition：
1st, assembled moulding bed will be hung on successively positioned at middle vertical web, determine to assembling position line, reference edge during longitudinal register
Concordant with bottom edge, laterally hold out against with middle diaphragm plate, qualified rear positioning welding is fixed；
2nd, the separator unit weld seam of interposition is welded：First weldering separator unit and base plate weld seam, then weldering separator unit with
Vertical web weld seam, is welded to and stops welding from top 300mm；
3rd, indulge the welding of web weld seam：First weld vertical weld seam between web and base plate, then weld splicing welding joint between vertical web,
Weld vertical weld seam between web and middle diaphragm plate afterwards；
（6）, be pointed to side again separator unit assembled：
Separator unit positioned at side is hung on assembled moulding bed successively and carries out determining spelling, laterally have 2% drain slope, and
Vertical with bottom board unit, the dividing plate top increment spacing of separator unit is corresponding with the U rib spacing of top plate unit；
（7）, be pointed to the secondary assembly of vertical web unit of side again：
1st, indulge the horizontal stroke of web unit, longitudinal register on the basis of the position line marking, and be close to vertical web unit, qualified after
Positioning welding is fixed；
2nd, the separator unit weld seam welding of opposite side：First weldering separator unit and base plate weld seam, then weld separator unit and indulge
Web unit weld seam, is welded to and stops welding from top 300mm；
3rd, the vertical web unit weld seam welding of opposite side：First weld vertical weld seam between web unit and base plate, then weld vertical abdomen
Splicing welding joint between Slab element, finally welds vertical weld seam between web unit and dividing plate；
（8）, top plate unit assembled：
1st, top plate unit assembling should meet horizontal 2% horizontal wall inscription of design and longitudinal steel bridge line style requires, during top plate unit assembling,
Some ballast blocks auxiliary can be made, so that top plate unit contacts and holds out against with diaphragm plate, web unit；
2nd, top plate unit weld seam welding：First weld internal weld seams, weld external splice weld seam afterwards.Carrying out internal weld seams welding
When, first weld seam between weldering top plate unit and vertical web unit, then weld seam between weldering top plate unit and separator unit；External splice
During weld seam welding, first weld longitudinal spliced weld seam, weld horizontally-spliced weld seam afterwards, postwelding carries out UT flaw detection on request；
（9）, to choose arm unit assembled：
Finally carry out choosing arm unit assembly, half-breadth and the 2% horizontal gradient, qualified rear welding are monitored using theodolite；
（10）, steel bridge box beam quality testing：
Often directly on assembled moulding bed, carry out assembled quality examination after the completion of wheel steel bridge box beam integral assembly welding, should solve before inspection
Except the constraint to beam body for the moulding bed, box beam is made to be in free state；
The scope of examination includes：Bridge is longitudinally linear；Box beam longitudinal direction accumulation length；Distortion；Port match situation between sections；
1st, steel bridge overall wire type checking：
Line style detects：Bridge line style checks on the basis of the theoretical absolute altitude at longitudinal centre line, and each box beam two ends of detection are horizontal
Actual elevation value at dividing plate, checks the side sway of pre-splicing beam section centrage while checking linear；
Box beam distortion checks：It is by checking the left and right absolute altitude value at the diaphragm plate of each beam section two ends, judging the water of each beam section
Level state and distorting event.
2nd, between box beam port matching precision inspection：
Between box beam, port connection should check deck-molding at vertical web unit；Adjacent vertical web unit para-position deviation；Base plate is put down tiltedly
Docking corner deviation, edges of boards unfitness of butt joint, top board longitudinal rib unfitness of butt joint；
3rd, groove gap inspection：
The gap of steel box girder segment interface must strictly control, and excessive gap can increase welding contracted quantity, and gap
Too small easily cause weld seam melt impermeable.Therefore specify that reasonable groove gap is to ensure that a key factor of steel box-girder quality；
It is 6mm that this bridge gauge determines sections interface gaps minima, and its tolerance scope is 0-4mm, other that sections connects
Key element all must be launched with this；
For this reason, taking gap positioning process plate in overall package it is ensured that gap size, determine some at top, base plate
Individual gap anchor point, for clearance inspection；
If gap is less than setting, should be modified；After correction finishes, check whether the unfitness of butt joint of edges of boards is less than
1mm, finally by all data Ji Lu check tables.
Claims (1)
1. a kind of preparation method of interchange steel bridge, interchange steel bridge includes bottom board unit（1）, separator unit（2）, vertical abdomen
Slab element（3）, top plate unit（4）With choose arm unit（5）, described bottom board unit（1）Top be provided with vertical web unit（3）,
Described vertical web unit（3）In be provided with separator unit（2）, described separator unit（2）With vertical web unit（3）Top set
There is top plate unit（4）, described top plate unit（4）A side be provided with and choose arm unit（5）；
Described bottom board unit includes the base plate in dislocation splicing distribution（6）, described base plate（6）It is provided with base plate I type to put more energy into
Bar（7）；
Described vertical web unit includes equally distributed vertical web（8）, described vertical web（8）Bottom be connected to adjacent bottom
Plate I type stiffening rib（7）Between；
Described separator unit includes median septum（9）And side partition（10）, described vertical web（8）Between be provided with uniform intervals distribution
Median septum（9）And side partition（10）, described median septum（9）With side partition（10）Be interspersed, in cross direction profiles every
Plate（9）In same linear distribution, the side partition of cross direction profiles（10）In same linear distribution, described median septum（9）With
Side partition（10）Bottom be respectively equipped with and base plate I type stiffening rib（7）The dividing plate bottom increment of phase clamping positioning（11）, described
Median septum（9）With side partition（10）Top be respectively equipped with dividing plate top increment（12）；
Described top plate unit includes the top board in dislocation splicing distribution（13）, described top board（13）Bottom be provided with and dividing plate
Top increment（12）, vertical web（8）The fixing top board fixing end of top phase（14）；
Described arm unit of choosing includes choosing arm plate（15）, described chooses arm plate（15）It is located at the outer wall of top plate unit, described chooses
Arm plate（15）Top and top board（13）Top be in same horizontal line be distributed；
It is characterized in that carrying out according to the following steps：
（1）, the laying of support jig：
1st, figure is arranged according to grade separation steel bridge support jig, release projection line and the position line of support jig on the ground；
Support jig adjacent transverse centre of location line controls in the range of ± 0.5mm along the longitudinal spacing deviation of grade separation steel bridge；
2nd, the ground line-transect setting moulding bed according to support jig, first arranges the base of support jig, for preventing the movement of support jig
The overall line style of impact grade separation steel bridge, base is connected using studs with ground；
3rd, the base of support jig arranges and after the assay was approved, then transplants the centre of location line of the horizontal stroke on base, longitudinal beam
To the upper surface of base, the then projected boundary line according to centre of location line and support jig, along steel bridge longitudinally position successively horizontal,
Longitudinal beam, and adjust centrage and be welded and fixed to after overlap, fixing after the center distance deviation of adjacent transverse beam cannot be greater than
±1mm；
4th, after the completion of the transverse beam of support jig and longitudinal beam are laid on request, check whether firm it is ensured that assembling of steel bridge process
In will not be moved；Then detection, the flatness of adjustment moulding bed panel supporting surface, flatness tolerance is not more than 5mm；
5th, support jig design drawing requires, and releases moulding bed panel position line, with moulding bed panel position line in transverse beam
On the basis of, set gradually moulding bed panel, panel takes CNC cutting, must be through Precision Machining with bridge base plate contact surface；
The setting of moulding bed panel meets claimed below：Laterally line is consistent with the bridge lateral gradient, is 2% horizontal wall inscription；Longitudinal line is
Steel bridge becomes bridge line style；After meeting the requirements, fixation is welded on crossbeam；
（2）, moulding bed detection：
After the completion of the support jig laying of grade separation steel bridge, carry out the inspection of each observing and controlling point coordinates on moulding bed panel using total powerstation
Survey, and record measurement data, then will measure coordinate Value Data and import computer, draw steel bridge moulding bed setting line style, with design
The one-tenth bridge line style requiring is compared, and when there is deviation, local panel is adjusted, until completely the same meet design
Bridge line style is become to require；
（3）, grade separation steel bridge molding：
1st, bottom board unit is assembled：After support jig assembly, the base plate checking qualified is hung on support jig successively, fixed sample base over the ground
Directrix, and fixed using interim Karma or spot welding, to obtain good one-tenth bridge line style after being close to moulding bed panel；
2nd, mark centrage on each base plate, and mark base plate I type stiffening rib and web cell location line on the basis of centrage, press
Benchmark line position lays base plate I type stiffening rib successively and spot welding is fixed；
3rd, adopt CO2Gas shielded arc welding, welds to base plate I type stiffening rib, symmetrical welding from the middle to both ends, is welded to from base plate I type
Stop welding at the 200mm of stiffening rib termination, be completely cooled down to after room temperature after weld seam, the spacing of detection base plate I type stiffening rib, the bottom of with
The perpendicularity of plate, at separator unit, base plate I type stiffening rib detects that the rate that falls into of model reaches 100%, if base plate I type stiffening rib
Spacing is not met technical requirements and is then corrected using local heating mode, and heating is corrected temperature and is 700 DEG C～800 DEG C；
4th, the splicing of bottom board unit adopts CO2Gas shielded arc welding or CO2Gas shielded arc welding bottoming, Lincoln weld filling and capping；
Base plate splices welding sequence：The longitudinal seam of first foot plate splicing, then weld horizontally-spliced weldering, postwelding repetition measurement base plate I type
The spacing of stiffening rib is it is ensured that the rate that falls into of detection model reaches 100%；
（4）, first assembled to the separator unit of interposition：
1st, the separator unit of steel bridge box beam has steel flanged beam and two kinds of open web type, and wherein median septum is open web type, and side partition is real abdomen
Formula；
It is located at middle separator unit to divide because beam section manufactures section, breaks it into two, before assembly, utilize interim code as requested
Separator unit is linked to be entirety by plate；
2nd, separator unit is hung on assembled moulding bed, after the fixed position line to assembling, positioning welding is fixed, separator unit and bottom board unit
It is adjacent to assembling；
For ensureing the positioning stability of rear bulkhead unit and the perpendicularity with bottom board unit, need to add in separator unit both sides after positioning
Temporary support；
（5）, first once assembled to the vertical web of interposition：
1st, assembled moulding bed will be hung on successively positioned at middle vertical web, determine to assembling position line, reference edge and bottom during longitudinal register
Edges of boards edge is concordant, laterally holds out against with middle diaphragm plate, qualified rear positioning welding is fixed；
2nd, the separator unit weld seam of interposition is welded：First weldering separator unit and base plate weld seam, then weldering separator unit and vertical abdomen
Plate welding seams, are welded to and stop welding from top 300mm；
3rd, indulge the welding of web weld seam：First weld vertical weld seam between web and base plate, then weld splicing welding joint between vertical web, finally weld
Weld seam between vertical web and middle diaphragm plate；
（6）, be pointed to side again separator unit assembled：
Separator unit positioned at side is hung on assembled moulding bed successively and carries out determining spelling, laterally have 2% drain slope, and with bottom
Slab element is vertical, and the dividing plate top increment spacing of separator unit is corresponding with the U rib spacing of top plate unit；
（7）, be pointed to the secondary assembly of vertical web unit of side again：
1st, indulge the horizontal stroke of web unit, longitudinal register is on the basis of the position line marking, and be close to vertical web unit, qualified rear positioning
It is welded and fixed；
2nd, the separator unit weld seam welding of opposite side：First weldering separator unit and base plate weld seam, then weldering separator unit and vertical web
Unit weld seam, is welded to and stops welding from top 300mm；
3rd, the vertical web unit weld seam welding of opposite side：First weld vertical weld seam between web unit and base plate, then weld vertical web list
Splicing welding joint between unit, finally welds vertical weld seam between web unit and dividing plate；
（8）, top plate unit assembled：
1st, top plate unit assembling meets horizontal 2% horizontal wall inscription of design and longitudinal steel bridge line style requires, and during top plate unit assembling, makes one
A little ballast block auxiliary, so that top plate unit contacts and holds out against with diaphragm plate, web unit；
2nd, top plate unit weld seam welding：First weld internal weld seams, weld external splice weld seam afterwards, when carrying out internal weld seams welding, first
Weld seam between weldering top plate unit and vertical web unit, then weld seam between weldering top plate unit and separator unit；External splice weld seam
During welding, first weld longitudinal spliced weld seam, weld horizontally-spliced weld seam afterwards, postwelding carries out UT flaw detection on request；
（9）, to choose arm unit assembled：
Finally carry out choosing arm unit assembly, half-breadth and the 2% horizontal gradient, qualified rear welding are monitored using theodolite；
（10）, steel bridge box beam quality testing：
Often directly assembled quality examination is carried out on assembled moulding bed after the completion of wheel steel bridge box beam integral assembly welding, before checking, release moulding bed
Constraint to beam body, makes box beam be in free state；
The scope of examination includes：Bridge is longitudinally linear；Box beam longitudinal direction accumulation length；Distortion；Port match situation between sections；
1st, steel bridge overall wire type checking：
Line style detects：Bridge line style checks on the basis of the theoretical absolute altitude at longitudinal centre line, detects each box beam two ends diaphragm plate
The actual elevation value at place, checks the side sway of pre-splicing beam section centrage while checking linear；
Box beam distortion checks：It is by checking the left and right absolute altitude value at the diaphragm plate of each beam section two ends, judging the horizontal of each beam section
State and distorting event；
2nd, between box beam port matching precision inspection：
Between box beam, port connects deck-molding at the vertical web unit of inspection；Adjacent vertical web unit para-position deviation；The flat bevelled halving of base plate turns
Angular displacement, edges of boards unfitness of butt joint, top board longitudinal rib unfitness of butt joint；
3rd, groove gap inspection：
The gap of steel box girder segment interface must strictly control, and excessive gap can increase welding contracted quantity, and gap is too small
Easily cause weld seam and melt impermeable, therefore specify that reasonable groove gap is to ensure that a key factor of steel box-girder quality；
It is 6mm that this bridge gauge determines sections interface gaps minima, and its tolerance scope is 0-4mm, other key elements that sections connects
All must be launched with this；
For this reason, taking gap positioning process plate in overall package it is ensured that gap size, at top, base plate, determine several
Gap anchor point, for clearance inspection；
If gap is less than setting, it is modified；After correction finishes, check whether the unfitness of butt joint of edges of boards is less than 1mm, finally
By in all data Ji Lu check tables.
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| CN107059626B (en) * | 2016-12-22 | 2019-12-31 | 浙江大学 | Rapid construction method for transverse block longitudinal segmentation of urban elevated steel box girder bridge |
| CN108842625A (en) * | 2018-06-28 | 2018-11-20 | 武船重型工程股份有限公司 | A kind of girder steel ballast and its installation method |
| CN109653098A (en) * | 2018-09-28 | 2019-04-19 | 江苏中铁山桥重工有限公司 | A kind of nothing left dimension box girder assembling method |
| CN109208486B (en) * | 2018-10-19 | 2020-09-01 | 江苏京沪重工有限公司 | Embedding and repairing segmented manufacturing process between steel bridge roof plates |
| CN110541349A (en) * | 2019-09-06 | 2019-12-06 | 中国五冶集团有限公司 | Space curved surface special-shaped steel box girder bridge section and accurate welding processing forming method thereof |
| CN110842384B (en) * | 2019-11-13 | 2021-10-12 | 重庆交通建设(集团)有限责任公司 | On-site connection process of steel box girder |
| CN112252187B (en) * | 2020-09-02 | 2022-08-16 | 中铁五局集团华南工程有限责任公司 | In-situ scattered assembling and hoisting method for steel box girder |
| CN112609574A (en) * | 2020-11-16 | 2021-04-06 | 中冶(上海)钢结构科技有限公司 | Construction method for temporarily fixing complex steel box girder with through-length stiffening rib at high altitude |
| CN112496590B (en) * | 2020-12-31 | 2022-05-31 | 江苏京沪重工有限公司 | Cantilever type steel box girder manufacturing process |
| CN113481835A (en) * | 2021-08-17 | 2021-10-08 | 江苏沪宁钢机股份有限公司 | Stable bridge tower pier based on complex pier beam and manufacturing process thereof |
| CN113565259B (en) * | 2021-08-18 | 2022-07-15 | 江苏京沪重工有限公司 | Machining process for cantilever section of steel box girder of circular arc cantilever landscape platform |
| CN115162182B (en) * | 2022-07-20 | 2023-09-15 | 中国五冶集团有限公司 | Cantilever type steel box girder high-precision cable hoisting construction method |
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| JP2007077658A (en) * | 2005-09-14 | 2007-03-29 | Sumitomo Mitsui Construction Co Ltd | Construction method for bridge girder |
| CN201648940U (en) * | 2010-04-14 | 2010-11-24 | 江苏中泰钢结构股份有限公司 | Middle block for overhead bridge steel box girder with heightening and twisted cross section |
| CN202380391U (en) * | 2011-11-26 | 2012-08-15 | 江苏中泰桥梁钢构股份有限公司 | Separation type intermediate crossbeam block structure for steel box girder |
| CN103422423B (en) * | 2012-05-19 | 2016-01-20 | 交通运输部公路科学研究所 | The quick spelling bridge of sectional type modularization |
| CN104060523B (en) * | 2014-05-23 | 2017-06-13 | 浙江东南网架股份有限公司 | A kind of ultra-large type bridge box beam component, jig frame special and its assemble method |
| CN204644850U (en) * | 2015-05-06 | 2015-09-16 | 浙江东南网架股份有限公司 | A kind of interchange steel bridge |
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