CN102182139B - Manufacturing method of three-crankcase steel connecting bridge - Google Patents
Manufacturing method of three-crankcase steel connecting bridge Download PDFInfo
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- CN102182139B CN102182139B CN 201110121211 CN201110121211A CN102182139B CN 102182139 B CN102182139 B CN 102182139B CN 201110121211 CN201110121211 CN 201110121211 CN 201110121211 A CN201110121211 A CN 201110121211A CN 102182139 B CN102182139 B CN 102182139B
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Abstract
The invention discloses a three-crankcase steel connecting bridge. The bridge consists of a top plate, a bottom plate, longitudinal web plates, a longitudinal stiffening plate, a transverse partition plate, an end cladding plate and bridge pier supports; the longitudinal web plates are fixed on the bottom plate, and the longitudinal stiffening plate is parallel to the longitudinal web plates and arranged between the longitudinal web plates; the transverse partition plate is arranged between the longitudinal web plates; the bridge pier supports are arranged at two ends of the bottom plate; and the top plate is covered on the longitudinal web plates and the longitudinal stiffening plate. The invention also discloses a manufacturing method of the three-crankcase steel connecting bridge. The three-crankcase steel connecting bridge has skilful structural design, unique shape, novel structure and smooth line type, and is light and attractive. According to the manufacturing method, a zone integrated assembly method is adopted in manufacture, and the integrated assembly is replaced by circular assembly, so the manufacturing quality is ensured, smooth field installation is ensured, and the field installation progress requirement can also be met.
Description
Technical field
The present invention relates to a kind of large-scale steel bridge, specifically is that a kind of distortion is big, the inner space is little, three bent box-shaped steel crossovers of complex structure and preparation method thereof.
Background technology
The international medium of phoenix is centered close to Beijing Chaoyang Park, is the media experience cabin of novel concept, and it has surmounted the relation that medium and spectators in the past exchange across screen, spectators is introduced the glamour of experiencing the phoenix medium in the middle of the open Moebius annular space.The international medium central steel of phoenix structure belongs to very large span spatial strcture, is about 130m, wide about 124m.The steel work awning is made up of bidirectional crossed girder construction and the vertical support system of enjoying a double blessing, and surface area is about 27500 square metres, and weight reaches about 5200 tons, and is two-layer inside and outside the branch.
The international medium central steel of phoenix crossover is peculiarly shaped, novel structure, line style are smooth, lightly attractive in appearance, both as the arc doorframe at thing gate, links to each other with the upper channel in two buildings, north and south simultaneously, combines highest quality together with whole roofing awning.
The maximum characteristics of steel crossover structure are " three songs " box structure forms.The one, cross section is the crescent of gradual change, and width highly is 0.9m by 6m ~ 11m variation, middle part, cross section; The 2nd, be the parabola arch along its length, the about 7m of middle part sagitta; The 3rd, the outside projection is respectively irregular arc in the bridge floor.
Along with the develop rapidly of China's steel work industry, peculiar, the novel engineering of various appearance is of common occurrence in recent years.Being the difficult point of fabrication and processing and hoisting and locating especially with the bending in various structures, appearance, is that the engineering of representative has: National Stadium, new airport, Kunming etc. with bending appearance wherein.With the steel crossover at the international medium of phoenix center and the contrast of road bridge, viaduct and bending component, can find out that the manufacture difficulty of steel crossover is far longer than steel bridge and the bending component in the Other Engineering.
Common road bridge, viaduct, cross section in echelon, camber line is milder along its length, encorbelmenting in both sides can back dress, the general broad ways of main body is split into two segmentations and get final product, permission does not then need segmentation like traffic condition, the box house space is big, is convenient to construct.Component specification: cross section becomes rectangle, and upper and lower panel bending trend is identical, and left side plate bending trend is close.Cross-sectional height is moderate, and width is bigger, and the two-port size is controlled in easy construction emphatically.The international medium central steel of phoenix crossover cross section becomes crescent and width constantly to change, and camber line is rapider along its length, and sagitta reaches 7 meters, does not encorbelment in the cross section, and base plate forms monoblock, and width need be divided into two to three segmentations.The box house space is narrow and small, construction inconvenience.Cross section becomes crescent, and top board becomes to be similar to helicoid, and base plate is three curved surfaces, little, the complex structure in inner space, and construction is inconvenient, the subsection that is split into, both sides or be interface all around, required precision is high, and difficulty of construction is big.
The difficulty of this engineering also is:
1, the division of lifting segmentation
Nearly 300 tons of single seat steel crossover weight, the size of segmentation and form directly influence the processing and fabricating and the on-the-spot lifting of factory, and then influence the quality and the plan of whole engineering.Therefore, it is most important how to carry out rational segmentation, and this is first difficult point of steel crossover processing and fabricating;
2, the formulation of processing scheme
After single seat steel crossover carried out the segmentation division, how factory processed each segmentation; Steel crossover inner space is narrow and small, and which technological measure complex structure adopts guarantee the assembling and the welding of component, and this is second difficult point of steel crossover processing and fabricating;
3, the formulation of assembling scheme in advance
The steel crossover splits into some subsections, as adopts whole assembly in advance, then because sagitta is big; The assembly unit moulding bed is set up height; Cause the time of assembly unit longer, how to guarantee that each segmentation of steel crossover reaches whole preframed effect and don't influences the field erected duration, assembling scheme is the 3rd difficult point in advance.
Summary of the invention
Goal of the invention:, the invention provides that a kind of distortion is big, the inner space is little, three bent box-shaped steel crossovers of complex structure and preparation method thereof in order to solve the problems of the prior art.
Technical scheme: in order to realize above purpose, of the present invention a kind of three bent box-shaped steel crossovers are made up of top board, base plate, vertical web, vertical stiffener, lateral partitions, end wrapper sheet and bridge pier bearing pad; Vertically web is fixed on the base plate, and vertically stiffener is parallel with vertical web and be installed between vertical web; Lateral partitions is installed between vertical web; Bridge pier bearing pad is installed on the base plate two ends; Top board covers on vertical web and vertical stiffener; The end wrapper sheet is wrapped in the two ends of steel crossover; The cross section of said steel crossover is a crescent.
The invention also discloses the preparation method of above-mentioned three bent box-shaped steel crossovers, the concrete steps of this preparation method are following:
(a) at first according to the plan of three bent box-shaped steel crossovers; Create the CAD 3D three-dimensional model of three bent box-shaped steel crossovers; Convert the CAD three-dimensional model to the line mould then, again the line mould is resolved into: top board, base plate, vertical web, vertical stiffener, lateral partitions, end wrapper sheet and bridge pier bearing pad part;
(b) sized as requested: top board, base plate, vertically web, vertically stiffener, lateral partitions, end wrapper sheet and bridge pier bearing pad part; And the bridge pier bearing pad part is closed up dress weld, accomplish the bridge pier bearing pad of box;
(c) mark position baseline on ground, and make the assembling moulding bed;
(d) assembling moulding bed location is gone up in the top board lifting;
(e) on top board, mark lateral partitions, vertically the installation site line of web, vertical stiffener;
(f) vertical web, vertical stiffener being hung on assembling moulding bed tacking connects; Concrete grammar is: vertical web is hung on the assembling moulding bed position, during the location installation site line of vertical web center with the top board surface alignd, vertically the end of web and ground position baseline coincide simultaneously; Vertically web, vertical each part of stiffener are bent plate component; Its installation accuracy directly influences the installation of lateral partitions, base plate; Must guarantee vertical web, the vertically fairing of stiffener line style when therefore locating; The appearance of no flex point, obstinate shelves guarantees that web and top board are closely connected, and closely connected degree is less than 1mm; Vertically web, the vertically location employing plumb bob and the tape measure of stiffener vertical direction; When welding location back adopt " disperse, symmetry, evenly, reduce constraint (restraint) degree " principle weld, the CO2 gas shield is adopted in welding; Vertically marking the dividing plate framing line on the web then;
(g) lateral partitions is lifted the dress weldering of upper plate location; With cutting edge polishing light, remove the lateral partitions of cutting things such as slag, burr, hang on the assembling moulding bed and position; During the location alignd with the installation site line on top board surface and the dividing plate framing line on vertical web in lateral partitions thickness of slab center;
(h) the dress weldering of assembling moulding bed location is gone up in the base plate lifting;
(i) the dress weldering of assembling moulding bed location is gone up in the bridge pier bearing pad lifting;
(j) the dress weldering of assembling moulding bed location is gone up in wrapper sheet lifting in end, accomplish the making of steel crossover.
Owing to consider that steel crossover appearance and size is big, Heavy Weight according to the crane capacity of on-site hoisting equipment, is taken into account factors such as factory process and transportation simultaneously, after taking all factors into consideration single seat steel crossover is divided into multistage along its length and carries out sectional making among the present invention.Again because the installation of the scene of steel crossover is to be carried out to the centre by two ends; If adopt whole assembly unit in advance, then can't satisfy on-the-spot lifting plan, incur loss through delay the duration of engineering; Given this; Adopt when the steel crossover is made and divide the method for section integral assembling to carry out, after sectional making was accomplished, the overlapping preparatory assembly unit verification of integral body was carried out in three adjacent segmentations successively.Method with this assembly unit that circulates substitutes integral assembling, has both guaranteed the quality of making, and has also guaranteed on-the-spot smooth installation, also can satisfy on-the-spot installation progress requirement simultaneously.
Because dress weldering inner space is narrow and small, not easy to operate, during said sectional making, again the segmentation broad ways is divided into three each subsections, after each subsection completes, whole verification.
Among the present invention, the localization method of top board is in the said step (d): broad ways was divided into three parts when top board was made, and assembling moulding bed location is gone up in the top board lifting of three parts of segmentations, and the location of top board is a benchmark with the plate center, positions laterally successively; During the location with the top board outer edge to the flush with ground position baseline, top end and ground position baseline correspondence position coincide.Weld gap during the location between the segmentation top board need not deducted, and the zero clearance state connects, the adjustment compensation rate that this weld gap shrinks as welding, rectification; Require the fairing of line style and closely connected with the moulding bed face behind the top board location, closely connected degree is less than 1mm.
The fixed-position welding method of base plate is following in the step described in the present invention (h): the base plate broad ways is divided into both sides base plate and central floor panel; Assembling moulding bed location is gone up in base plate lifting in both sides, behind the location, carry out the welding of lateral partitions and both sides base plate; Because of the inner space less; When lateral partitions and the welding of both sides base plate,, carry out the welding of lateral partitions and both sides base plate through hand hole vertically offering hand hole on the web; After the welding hand hole is carried out shutoff, both sides base plate, lateral partitions, vertical web weld together and constitute two subsections; Then assembling moulding bed location is gone up in the central floor panel lifting; Behind the central floor panel location; The subsection of both sides is hung moulding bed, central floor panel and vertical web, lateral partitions are being welded subsection in the middle of constituting after welding is accomplished; At last the both sides subsection is lifted assembling moulding bed location once more, with both sides subsection and the whole verification of middle subsection.
Along its length the medial section of segmentation among the present invention, its link all places the 150mm surplus, and in addition, all section length Fang Jun place 1 ‰ welding allowances for shrinkage.The top board both lateral sides of each segmentation respectively places 30 mm surpluses, and the both sides base plate of base plate and the junction of central floor panel all place 50 mm surpluses, and the width of top board, base plate, and every grade of vertical web places the 1mm allowance for shrinkage.
Beneficial effect: advantage of the present invention is:
1, ingenious, peculiarly shaped, the novel structure of of the present invention three bent box-shaped steel crossover structure designs, line style are smooth, lightly attractive in appearance;
2, in the preparation method of of the present invention three bent box-shaped steel crossovers; Adopt during making and divide the method for section integral assembling to carry out; Method through the circulation assembly unit substitutes integral assembling; Both guarantee the quality of making, also guaranteed on-the-spot smooth installation, also can satisfy on-the-spot installation progress requirement simultaneously;
3, the preparation method of of the present invention three bent box-shaped steel crossovers adopts reasonably processing assembling welding sequence, makes in the whole three bent box-shaped steel crossover process distortion little, firm in structure, and quality is high.
Description of drawings
Fig. 1 is a moulded sketch map of the present invention.
Fig. 2 is the segmentation sketch map in the embodiment of the invention.
Fig. 3 is for vertically web, vertical stiffener, lateral partitions are positioned at the sketch map on the top board among the present invention.
Fig. 4 is the intermediate structure sketch map among the present invention.
Fig. 5 is the end construction sketch map among the present invention.
The specific embodiment:
Below in conjunction with specific embodiment; Further illustrate the present invention; Should understand these embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims to the modification of the various equivalent form of values of the present invention and limit.
Embodiment
It is made up of top board 1, base plate 2, vertical web 3, vertical stiffener 4, lateral partitions 5, end wrapper sheet 6 and bridge pier bearing pad 7 like Fig. 1 described a kind of three bent box-shaped steel crossovers; Vertically web 3 is fixed on the base plate 2, and vertically stiffener 4 is parallel with vertical web and be installed between vertical web 3; Lateral partitions 5 is installed between vertical web 3; Bridge pier bearing pad 7 is installed on base plate 2 two ends; Top board 1 covers on vertical web 3 and vertical stiffener 4; End wrapper sheet 6 is wrapped in the two ends of steel crossover; The cross section of said steel crossover is a crescent.
When making in the present embodiment three bent box-shaped steel crossovers are divided into seven segmentations along its length, first segmentation 11, second segmentation 12, the 3rd segmentation 13, the 4th segmentation 14, the 5th segmentation 15, the 6th segmentation 16, the 7th segmentation 17; Then each segmentation broad ways is divided into three subsections.
Also disclose the preparation method of three bent box-shaped steel crossovers of above-mentioned segmentation in the present embodiment, concrete steps are following:
(1) at first according to the plan of three bent box-shaped steel crossovers; Create the CAD 3D three-dimensional model of three bent box-shaped steel crossovers; Convert the CAD three-dimensional model to the line mould then, again the line mould is resolved into: top board, base plate, vertical web, vertical stiffener, lateral partitions, end wrapper sheet and bridge pier bearing pad part;
(2) sized as requested: top board, base plate, vertically web, vertically stiffener, lateral partitions, end wrapper sheet and bridge pier bearing pad part; And the bridge pier bearing pad part is closed up dress weld, accomplish the bridge pier bearing pad of box;
(3) make second segmentation, the preparation method of the 3rd segmentation, the 4th segmentation, the 5th segmentation and the 6th segmentation is with second segmentation;
(4) make first segmentation, the preparation method of the 7th segmentation is with first segmentation;
(5) with first segmentation, second segmentation, the preparatory assembly unit of the 3rd segmentation; The 5th segmentation, the 6th segmentation and the preparatory assembly unit of the 7th segmentation; The 3rd segmentation, the 4th segmentation and the preparatory assembly unit of the 5th segmentation;
(6) in advance assembly unit qualified after, the on-the-spot welding of installing is mail in first segmentation to the, seven segmentations.
The preparation method of second segmentation is following in the present embodiment:
(A) mark position baseline on ground, and make the assembling moulding bed;
(B) assembling moulding bed location is gone up in the top board lifting;
(C) on top board, mark lateral partitions, vertically the installation site line of web, vertical stiffener;
(D) vertical web, vertical stiffener being hung on assembling moulding bed tacking connects; Adopt during welding " disperse, symmetry, evenly, reduce constraint (restraint) degree " principle weld, the CO2 gas shield is adopted in welding;
(E) lateral partitions is lifted the dress weldering of upper plate location;
(F) the dress weldering of assembling moulding bed location is gone up in the base plate lifting.
The preparation method of first segmentation reaches dress weldering bridge pier bearing pad and end wrapper sheet on the basis of the second sectional making method in the present embodiment, and concrete steps are:
(A) mark position baseline on ground, and make the assembling moulding bed;
(B) assembling moulding bed location is gone up in the top board lifting;
(C) on top board, mark lateral partitions, vertically the installation site line of web, vertical stiffener;
(D) vertical web, vertical stiffener being hung on assembling moulding bed tacking connects; Adopt during welding " disperse, symmetry, evenly, reduce constraint (restraint) degree " principle weld, the CO2 gas shield is adopted in welding;
(E) lateral partitions is lifted the dress weldering of upper plate location;
(F) the dress weldering of assembling moulding bed location is gone up in the base plate lifting;
(G) the dress weldering of assembling moulding bed location is gone up in the bridge pier bearing pad lifting; The column box steel member of said bridge pier bearing pad for surrounding by four blocks of plates;
(H) the dress weldering of assembling moulding bed location is gone up in wrapper sheet lifting in end, accomplish the making of steel crossover.
Claims (5)
1. the preparation method of a bent box-shaped steel crossover is characterized in that: said three bent box-shaped steel crossovers are by top board (1), base plate (2), vertically web (3), vertically stiffener (4), lateral partitions (5), end wrapper sheet (6) and bridge pier bearing pad (7) formation; Vertically web (3) is fixed on the base plate (2), and vertically stiffener (4) is parallel with vertical web and be installed between vertical web (3); Lateral partitions (5) is installed between vertical web (3); Bridge pier bearing pad (7) is installed on base plate (2) two ends; Top board (1) covers on vertical web (3) and vertical stiffener (4); End wrapper sheet (6) is wrapped in the two ends of steel crossover; The cross section of said steel crossover is a crescent;
The concrete steps of this preparation method are following:
(a) at first according to the plan of three bent box-shaped steel crossovers; Create the CAD 3D three-dimensional model of three bent box-shaped steel crossovers; Convert the CAD three-dimensional model to the line mould then, again the line mould is resolved into: top board, base plate, vertical web, vertical stiffener, lateral partitions, end wrapper sheet and bridge pier bearing pad part;
(b) sized as requested: top board, base plate, vertically web, vertically stiffener, lateral partitions, end wrapper sheet and bridge pier bearing pad part; And the bridge pier bearing pad part is closed up dress weld, accomplish the bridge pier bearing pad of box;
(c) mark position baseline on ground, and make the assembling moulding bed;
(d) assembling moulding bed location is gone up in the top board lifting;
(e) on top board, mark lateral partitions, vertically the installation site line of web, vertical stiffener;
(f) vertical web, vertical stiffener being hung on assembling moulding bed tacking connects; Adopt during welding " disperse, symmetry, evenly, reduce constraint (restraint) degree " principle weld, the CO2 gas shield is adopted in welding;
(g) lateral partitions is lifted the dress weldering of upper plate location;
(h) the dress weldering of assembling moulding bed location is gone up in the base plate lifting;
(i) the dress weldering of assembling moulding bed location is gone up in the bridge pier bearing pad lifting;
(j) the dress weldering of assembling moulding bed location is gone up in wrapper sheet lifting in end, accomplish the making of steel crossover.
2. the preparation method of according to claim 1 a kind of three bent box-shaped steel crossovers; It is characterized in that: said three bent box-shaped steel crossovers are divided into multistage along its length when making and carry out sectional making; After sectional making was accomplished, the overlapping preparatory assembly unit verification of integral body was carried out in three adjacent segmentations successively.
3. the preparation method of according to claim 2 a kind of three bent box-shaped steel crossovers is characterized in that: during said sectional making, broad ways is divided into three each subsections, after each subsection completes, and whole verification.
4. the preparation method of according to claim 1 a kind of three bent box-shaped steel crossovers; It is characterized in that: the localization method of top board is in the said step (d): broad ways is divided into three parts during the making of top board; Assembling moulding bed location is gone up in three parts of segmentation top board liftings; The location of top board is a benchmark with the plate center, positions laterally successively; During the location with the top board outer edge to the flush with ground position baseline, top end and ground position baseline correspondence position coincide.
5. the preparation method of according to claim 1 a kind of three bent box-shaped steel crossovers; It is characterized in that: the fixed-position welding method of base plate is following in the said step (h): the base plate broad ways is divided into both sides base plate and central floor panel, assembling moulding bed location is gone up in base plate lifting in both sides, behind the location; Carry out the welding of lateral partitions and both sides base plate; During welding,, carry out the welding of lateral partitions and both sides base plate through hand hole vertically offering hand hole (8) on the web; After the welding hand hole is carried out shutoff, both sides base plate, lateral partitions, vertical web weld together and constitute two subsections; Then assembling moulding bed location is gone up in the central floor panel lifting; Behind the central floor panel location, the subsection of both sides is hung moulding bed, with central floor panel with vertically web, lateral partitions are being welded; Subsection in the middle of constituting after welding is accomplished; At last the both sides subsection is lifted assembling moulding bed location once more, with both sides subsection and middle subsection, whole verification.
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Cited By (1)
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| CN102182139A (en) | 2011-09-14 |
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