CN105040567B - Interchange steel bridge and manufacture method thereof - Google Patents

Interchange steel bridge and manufacture method thereof Download PDF

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Publication number
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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China
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unit
plate
welding
base plate
weld seam
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CN201510225435.0A
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CN105040567A (en
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周观根
刘贵旺
张润
陈志军
周爱民
游桂模
张珈铭
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浙江东南网架股份有限公司
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Publication of CN105040567A publication Critical patent/CN105040567A/en
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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

A kind of interchange steel bridge and preparation method thereof

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.
CN201510225435.0A 2015-05-06 2015-05-06 Interchange steel bridge and manufacture method thereof CN105040567B (en)

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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

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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
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