CN103410081A - Steel box type composite beam forming method - Google Patents
Steel box type composite beam forming method Download PDFInfo
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- CN103410081A CN103410081A CN2013103706286A CN201310370628A CN103410081A CN 103410081 A CN103410081 A CN 103410081A CN 2013103706286 A CN2013103706286 A CN 2013103706286A CN 201310370628 A CN201310370628 A CN 201310370628A CN 103410081 A CN103410081 A CN 103410081A
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Abstract
Disclosed is a steel box type composite beam forming method. A split type processing method is utilized in a bottom box and a plug welding technology and an anti-deformation technology are utilized to effectively solve the problems of positioning of force transmission ribs, deformation of the bottom box and the like, and the prefabrication efficiency of steel-concrete composite bridges is improved by reasonably adjusting production processes. The adopted technical scheme of the steel box type composite beam forming method comprises utilizing steel plates as raw materials, leading the raw materials to be subjected to top plate forming, bottom box forming and wave plate forming, and performing assembling and welding to form a prefabricated steel box type composite beam. According to the steel box type composite beam forming method, assembly line production is utilized and large-scale processing and assembling of bottom boxes can be achieved in factories.
Description
Technical field
The present invention relates to a kind of processing method of box-beam structure, especially a kind of forming method that is applicable to industrialization processing, constitutionally stable assembled steel case composite beam.
Background technology
Concrete bridge is complied with the requirements of the times of eighties of last century, in bridge construction, play the important and pivotal role, met to a certain extent the demand of socio-economic development for means of transportation, improved living environment, promote economic liftoff, played critical effect.But the construction of concrete bridge exists many defects, wherein most important have 2 points:
1. the sand of its consumption, building stones, cement enormous amount, and a large amount of building wastes of the production of cement, aggregate and generation have been paid huge environmental protection cost;
2. the concrete bridge disease is multiple and concrete structure durability is poor.
Based on above-mentioned 2 reasons, start to allow the more concern of engineering circles than steel structure bridge, have more the steel-concrete combined structure bridge of economic advantages.In common concrete bridge, steel--mixed composite bridge has been given full play to the advantage separately of steel and concrete bi-material, have the characteristics such as good, the easy to control the quality system of stress performance, construction is convenient fast, durability is more guaranteed, and along with expanding economy, cost and concrete bridge more have comparativity.
In prior art, steel-mixed composite bridge plays the important and pivotal role in bridge construction, it as application number, is 200920282539.5 the disclosed steel web concrete of patent combined box beam, it comprises the casing that steel upper flange, concrete filled steel tube base plate, left and right Wavelike steel webplate form, and contains presstressed reinforcing steel in the concrete filled steel tube base plate.The upper flange of this steel-concrete combined structure bridge, the concrete filled steel tube base plate, left and right Wavelike steel webplates etc. are all prefabricated in factory, assembled, be conducive to realize the prefabricated of bridge member, batch production, standardized production, guarantee construction quality, and the superimposed compound beam of steel case is with the deadweight of bridge that has been used in combination decrease between Steel concrete, be no more than 40% of ordinary reinforced concrete bridge deadweight, this reduces 20%～30% than traditional Wavelike steel webplate bridge, engineering quantity and the scale of substructure have been reduced, reduced construction costs, improved anti-seismic performance.But because the concrete filled steel tube under casing is filling concrete, there is relative slippage in its structure being subject under load action, between the Intraabdominal concrete in case chamber and steel plate, thereby whole structural stability is had a negative impact, and causes a hidden trouble.
For solving the problems of the technologies described above, application number is that 201120053439.2 patent discloses a kind of for the superimposed joist steel box plate of steel case connector, it is provided with connector in inside, under casing abdominal cavity, described connector directly is placed under casing and connects upper and lower metal sheet, and described connector can adopt truss structure or net formula truss structure.But due under casing across footpath large (being generally 30m), highly be about 15cm, width is about 1 ~ 2m, how connector being fit in the long and narrow abdominal cavity of under casing, how can with the upper lower steel plate of under casing, being connected securely and how can preventing under casing causes due to continuous welding in process antiarch phenomenon etc. connector is stable, is technical problem urgently to be resolved hurrily in actual production technique.
Moreover, in the prefabricated process of steel-mixed combined bridge, restriction due to production equipment, working condition and production technology itself, the production efficiency of composite beam of causing being prefabricated in the factory can't be improved always, how can be when strengthening the composite beam capacity of resisting impact load, can further improve again the Prefabrication efficiency of composite beam to create larger economic benefit, be current composite beam precasting process and method technical problem urgently to be resolved hurrily.
Summary of the invention
The technical problem to be solved in the present invention is to provide the forming method of the box composite beam of a kind of steel, by under casing being adopted to split type processing, utilize plug welding technology and reversible deformation technology to efficiently solve the problems such as the location of power transmission muscle and under casing distortion, and, by rationally adjusting production process, improved the Prefabrication efficiency of steel-mixed combined bridge.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the forming method of the box composite beam of a kind of steel, described method be take steel plate as raw material respectively after roof formed, under casing moulding and wave plate forming, assembly welding forms the box composite beam of pre-manufactured steel, and key is: the concrete steps of described method comprise:
A, cut blank and carry out the blank pretreatment;
B, synchronous or asynchronous completing: under casing moulding, antinode sheet metal forming and roof formed;
C, along the axial bilateral symmetry of under casing, the antinode plate is set, the bottom of left and right sides antinode plate is parallel and with under casing, weld, top all symmetrical outward-dipping assembly to form cross section be the power transmission gusset pair of horn mouth formula;
D, form composite beam in the lifting of the right top of power transmission gusset welding top plate.
For strengthening the equal power effect of both sides antinode plate, and prevent that both sides antinode plate from can't bear the heavy load and produce deformation, in described step C, also be included in horizontally set strengthening gusset between the antinode plate of the left and right sides, the concrete steps of described step C comprise:
C1, at the assembly welding station, along the under casing parallel longitudinal, distribute and one group of external form of positioning welding is the strengthening gusset of bell mouth shape;
C2, the strengthening gusset bilateral symmetry the antinode plate is set, the inboard of antinode plate all with strengthening gusset positioning welding, allowance weld between antinode plate bottom and under casing, the strengthening gusset forms the horizontal dowel of both sides antinode plate, and it is the power transmission gusset pair of horn mouth formula that the antinode plate of both sides forms cross section by the strengthening gusset;
C3, at the automatic welding station, along the weld seam of antinode plate bottom, antinode plate and under casing are reinforced to welding and form integral structure.
Because the antinode plate is inclined between under casing and top board, in the situation that be subject to the greater impact load, for avoiding the antinode plate to can't bear the heavy load or distortion, by between the antinode plate of both sides, laterally connecting the strengthening gusset, strengthen location and the connection of both sides antinode plates, and made the power transmission of antinode plate more even, thereby made the load-bearing of under casing more even, avoid producing stress concentration point, extended the application life of compound bridge.
For saving production process, enhance productivity, in described step C1, at first strengthening gusset and under casing position spot welding, in step C2, at first at strengthening gusset one side tack-weld antinode plate, the strengthening gusset of repair welding simultaneously and under casing, and then opposite side antinode plate and strengthening gusset are positioned to spot welding, finally carry out step C3, namely at the automatic welding station, along the weld seam of antinode plate bottom, antinode plate and under casing are reinforced to welding formation integral structure.
Welding for convenience of top board and antinode plate, enhance productivity, when welding top plate, at first put top board and the overhead welding of antinode plate fixing, then by after beam body turning mechanism flip beam body, by automatic welding device, along top board, realize that with the weld seam welding between the antinode plate integral type is connected, realize that the concrete steps of described step D comprise:
D1, top board is lifted on to the right top of power transmission gusset;
D2, top board and antinode plate top are positioned to spot welding, top board and antinode plate and under casing assembly form preformed beam body;
D3, by preformed beam body, borrow the upset of group switching mechanism after, be transported to the automatic welding station, top board and antinode plate top are reinforced and weld the formation integral structure.
Because the strengthening gusset has only carried out tack-weld with both sides antinode plate in step C2, need to, after step D, carry out step e: will strengthen gusset and both sides antinode plate and top board and reinforce welding.Strengthen the middle cover of gusset and offer manhole, when alleviating the weight of beam body own, also facilitate artificial repair welding to strengthen gusset and antinode plate.
In compound bridge construction, due to the width of the top board width much larger than under casing, and convenient unification is carried out blank and is cut, therefore, top board need to carry out assembled and welding by least two daughter boards and form the monoblock plate body, based on this, in described step D1, top board is comprised of the daughter board of two block structure symmetries, respectively two daughter boards are lifted on to the right top of power transmission gusset, and between two daughter boards allowance weld, in step D2, two daughter boards position a postwelding with antinode plate top respectively, form integral structure along two daughter boards of weld seam assembly welding.
In described step B, the structure of under casing comprises oblate tubular steel casing, vertically is welded on the power transmission muscle between the upper and lower inner tubal wall of steel casing along the steel casing, and based on this, the concrete technology step of under casing moulding comprises:
B1, under casing base plate and under casing roof formed: will carry out pretreated plane under casing base plate blank through cold moudling crimping equipment, form the under casing base plate that bilateral symmetry is provided with circular-arc flange, and on the under casing top board blank of pretreated plane, form the under casing top board with the reserved plug welding through hole of plan weldering place of power transmission muscle;
B2, under casing base plate form micro-arch by tooling fixture limit shape location, along one group of power transmission muscle of under casing base plate parallel longitudinal welding;
B3, remove tooling fixture, and the above-mentioned under casing top board of processing through perforate transferred to under casing base plate top, and by power transmission muscle support limit between the circular-arc flange of under casing base plate both sides;
B4, the plug welding through hole of reserving on the under casing top board, position welding formation preformed under casing by under casing top board and power transmission muscle;
B5, the preformed under casing is formed to micro-arch by tooling fixture limit shape location, and the circular-arc flange of under casing base plate both sides and under casing top board are carried out to cut weldering formation under casing.
Described power transmission muscle is truss-like power transmission muscle, structure comprises: the upper reinforcing bar be arranged in parallel and lower reinforcing bar and be welded on reinforcing bar and lower reinforcing bar between the waveform spiral bar, upper reinforcing bar is connected with the plug welding of under casing top board, lower reinforcing bar is connected with the spot welding of under casing base plate, and described upper reinforcing bar and lower reinforcing bar all adopt square steel.Upper reinforcing bar, lower reinforcing bar adopt the square steel structure, and the contact area of the plane structure of square steel and base plate or top board is larger so on the one hand, are conducive to welding; Structure on the other hand can be overlapped on the edge of top board and bottom respectively on the plane of square steel, is conducive to realize location.
For convenience of the welding of under casing top board and under casing base plate, in step B2, the rim of the circular-arc flange of under casing base plate both sides all is overlapped on the power transmission muscle of respective side; In step B3, the rim of under casing top board both sides all is overlapped on the power transmission muscle of homonymy with the rim of the circular-arc flange of respective side; In step B5, the circular-arc flange of under casing base plate both sides and under casing top board are carried out to cut weldering formation integral type under casing on the power transmission muscle end face of respective side.
In described step B1, the radian of circular-arc flange is 170 ° ~ 190 °, and preferably radian is 180 °.
It is the straight flange that is parallel under casing base plate lower plane that the end of the circular-arc flange of described step B1 is provided with, and the width of this straight flange is 2 ~ 20mm.In the outside of semi arch, adopt the structure of straight flange, can be so that the fixedly welding of connector.
In described step B2 or B5, tooling fixture is the arch setting along the axial direction of under casing base plate, or adopts supported at three point spacing, and the two ends of under casing base plate are fixed, middlely by the jig higher than two ends jig 5 ~ 10mm, fixed by contour jig.
In described step C, the angle of inclination of antinode plate is: 13 ° ~ 23 °, and preferably 19 °.
In the manufacturing procedure of above-mentioned under casing, under casing being decomposed into under casing base plate, under casing top board and power transmission muscle processes respectively, last assembly welding together, not only realized the location of each parts, and shock-resistant ability strengthens, especially the straightway of base plate and semicircle segmental arc are by the block plate utilization technology moulding of colding pressing.
Described strengthening gusset is provided with two kinds of width, and narrow strengthening gusset is arranged between the crest of both sides antinode plate, and wide strengthening gusset is arranged between the trough of both sides antinode plate.
In described step B, the concrete technology step of antinode sheet metal forming comprises:
B11, pretreated ripple plate blank material form corrugated sheet by the punching press shaping equipment punching press;
B12, corrugated sheet vertically cut both sides by the Plasma cutting machine of following the tracks of with arc voltage along corrugated sheet, form upper and lower both sides with parallel domatic antinode plate.
The corrugated steel web plate composite box girder bridge is as steel--the innovation form of mixed composite bridge, and adopt the steel sheet that curves the setback shape to replace the concrete web, with concrete roof and under casing, form combined box beam system new structure.Take full advantage of shear behavior that Wavelike steel webplate is higher and bear the shearing in cross section, utilize concrete roof and under casing to bear the moment of flexure of the cross section overwhelming majority, utilize the Free Compression of corrugated sheet steel effectively to apply prestressing force.Have from heavy and light, materials'use efficiency is high, improves workability, normal usage energy and the long-term behaviour of structure, and the plurality of advantages such as good economy performance are in particular in:
(1) with corrugated sheet steel, make web, make the deadweight of case beam greatly reduce, approximately can alleviate 20%～30%, reduced engineering quantity and the scale of substructure, reduced construction costs, improved anti-seismic performance.
(2) because Wavelike steel webplate vertically is rugosity, thereby its longitudinal rigidity is lower, it to upper and lower wing plate concretely creep, the drying shrinkage deformation effect of contraction is less, avoided the transfer of prestressing force to web, increased substantially and applied prestressed efficiency.
(3) corrugated sheet steel has higher shearing resistance flexion capabilities, thereby available less thickness of slab meets larger shearing resistance demand, and without in length and breadth to putting more energy into, simplified the stiffening rib structure, and saved material.
(4) Wavelike steel webplate is produced in factory, has solved conventional concrete web construction very complicated, and large, the long in time limit shortcoming of assembled dismounting workload of the colligation of reinforcing bar and template, can accelerate speed of application, shortened the duration.
(5) improve shear resistance and the structure durability of web, effectively solve this Common Diseases of cracking of traditional prestressed concrete box-beam bridge web.
(6) Wavelike steel webplate makes bridge have stronger aesthetic feeling, and easy and environment coordination on every side is the bridge type selection preferably of mountain area, scenic spot.
In above-mentioned B12, after punching press forms corrugated sheet, also need the end face at the upper and lower two ends of corrugated sheet is cut, this is because the antinode plate need to be inclined between top board and under casing, its upper and lower end face need to be mated respectively at top board and under casing, being convenient welding on the one hand, is to make three's combination form organic whole on the other hand.
The concrete technology step of described steps A comprises:
A1: coil of strip uncoiling, and smoothing;
A2: according to design size, the steel plate after smoothing is cut, form respectively top board blank, ripple plate blank material and under casing base plate blank and the under casing top board blank of composite beam;
A3: blank pretreatment: above-mentioned blank is delivered to pre-processing device, completes ball blast and spray paint;
A4: concentrate sub-material: will be delivered to respectively manufacturing procedure separately through pretreated blank.
The invention has the beneficial effects as follows: the present invention has realized prefabricated, batch production, the standardized production of bridge member, guarantee construction quality, developed a kind of light and be easy to transport the brand-new bridge construction of installation, realized long-distance transportation, quick-assembling is built, and stabilized structure is reliable, and life cycle is long, maintenance cost is low, rebuilds the high requirement of recovery value utilization rate.The present invention is innovation to some extent on the form of structure of traditional Wavelike steel webplate case beam, proposes the superimposed composite beam of steel box structure of a kind of novel assembling Wavelike steel webplate, and for reducing application maintenance costs and the number of times in steel work later stage, steel all adopt weathering steel.Given full play to mechanics and the workability advantage of Wavelike steel webplate box girder bridge, material property advantage, the batch production streamline of weathering steel are manufactured advantage etc., have great practicality and novelty.
The present invention uses weathering steel, and the advantage aspect workability, material usage is especially remarkable:
(1) the industrialization Prefabrication is carried out in centralized management in factory, can fully adopt the construction technology of advanced semi-automatic or automation, pipelining, to save the labour and to reduce labour intensity, improve workmanship and labor productivity, thereby reduce construction costs.
(2) manufacture of the superimposed compound beam of steel case is not subjected to seasonal effect, the upper and lower part structure can be constructed simultaneously, and a large amount of minimizing of its construction the uses of the interim members such as template, support, many loaded down with trivial details workflows have been avoided, saved the site operation expense, greatly accelerate the construction speed of bridge, every bridge block site operation cycle generally was no more than for 2 weeks, had solved the long problem of prior art structural bridge construction period.Due to the shortening of construction period, the economic benefit and the social benefit that indirectly produce be significant.
(3) the superimposed compound beam of steel case is with the deadweight of bridge that has been used in combination decrease between Steel concrete, be no more than 40% of ordinary reinforced concrete bridge deadweight, it is more remarkable that this reduces 20%～30% deadweight effect than traditional Wavelike steel webplate bridge, engineering quantity and the scale of substructure can have more been reduced, reduce construction costs, improved anti-seismic performance.
(4) the convenient and swift construction of the superimposed composite beam bridge of precast assembly steel case, be very effective for the current demand of the bridge of the utmost point in the short time, is conducive to improve the traffic congestion situation of city and road.
In addition, processing method under casing in the present invention is improved, be different from traditional under casing processing method, adopt the processing method of under casing in the present invention to have following beneficial effect: (1) adopt prefabricate method solved traditional under casing construction complicated, long in time limit, from great shortcoming, be conducive to realize automated production processing, reduction of erection time quality assurance; (2) adopt parts processing, Combination Welding localization method to realize being located by connecting of power transmission muscle and under casing base plate and under casing top board, the internal stress useful effect that makes under casing in whole casing, improved the stability of under casing structure; (3) in further improved plan, the straightway of under casing base plate and semicircle segmental arc, by the block plate utilization technology moulding of colding pressing, have improved the whole impact resistance of casing.
The accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the box composite beam of steel in the present invention;
Fig. 2 is the main TV structure schematic diagram of under casing in the present invention;
Fig. 3 is the amplification sectional structure schematic diagram at A place in Fig. 2;
Fig. 4 is the main TV structure schematic diagram of medium wave web of the present invention;
In accompanying drawing, 1 represents top board, and 2 represent the antinode plate, 3 represent under casing, 3A represents firm casing, and 3-1 represents the under casing top board, and 3-2 represents the under casing base plate, 3-2-1 represents circular-arc turn over time, 3-3 represents the power transmission muscle, and reinforcing bar in the 3-3-1 representative, 3-3-2 represent the waveform spiral bar, the lower reinforcing bar of 3-3-3 representative, 4 representative strengthening gussets.
The specific embodiment
The forming method of the box composite beam of a kind of steel, the structure of described composite beam comprises top board, antinode plate and under casing.The processing method of the box composite beam of described steel comprises that early stage, blank cut and pretreatment, the manufacturing procedure of under casing, the manufacturing procedure of antinode plate and the manufacturing procedure of top board, and the assembly welding operation.Concrete steps comprise:
A, by coil of strip uncoiling, smoothing, and cut into respectively isometric under casing base plate blank, under casing top board blank and the antinode plate blank material and the top board blank that are used to form under casing according to design size; Adopt uncoiler, levelling machine by coil of strip launch, thick school, smart school become the satisfactory steel plate of planeness, and is transported to the cutting station by the running roller conveying equipment, by the first slitting of plate shearing machine, horizontal cutting again, realizes cutting, the blanking of above-mentioned blank according to designing requirement.Under casing base plate and under casing top board equal in length, the width difference.Steel plate through cutting is transported to the pretreatment station through the running roller conveying equipment, through ball blast, spray paint, dried descale and process.This operation key is to utilize PLC to control the coupling of uncoiling, pretreated speed and conveying equipment transmission speed.
The processing under casing: the structure of under casing 3 comprises oblate tubular steel casing 3A, vertically is welded on the power transmission muscle 3-3 between the upper and lower inner tubal wall of steel casing 3A along steel casing 3A, and based on this, the procedure of processing of under casing 3 moulding comprises:
B1, under casing base plate 3-2 and under casing top board 3-1 moulding: will carry out pretreated plane under casing base plate blank through cold moudling crimping equipment, form the under casing base plate 3-2 that bilateral symmetry is provided with circular-arc flange 3-2-1, and on the under casing top board blank of pretreated plane, form under casing top board 3-1 with the reserved plug welding through hole of plan weldering place of power transmission muscle 2; Simultaneously, the power transmission muscle of the isometric and matched of assembly welding and under casing base plate 3, described power transmission muscle 3-3 is truss-like power transmission muscle, structure comprises: the upper reinforcing bar 3-2-1 be arranged in parallel and lower reinforcing bar 3-2-3 and be welded on reinforcing bar 3-2-1 and lower reinforcing bar 3-2-3 between waveform spiral bar 3-2-2, upper reinforcing bar 3-2-1 is connected with under casing top board 3-1 plug welding, lower reinforcing bar 3-2-3 is connected with under casing base plate 3-2 spot welding, and described upper reinforcing bar 3-2-1 and lower reinforcing bar 3-2-3 all adopt square steel.The radian of circular-arc flange 3-2-1 is 170 ° ~ 190 °, and preferably radian is 180 °; It is the straight flange that is parallel under casing base plate 3-2 lower plane that the end of circular-arc flange 3-2-1 is provided with, and the width of this straight flange is 2 ~ 20mm.
Pretreated flat under casing base plate blank directly is transported to the cold moudling operation by the running roller conveying equipment through the sub-material district, in this operation by the roll-in guiding mechanism, transmission limit, limit is by the both sides bending of under casing base plate blank, base plate blank both sides are cold-pressed into to the semicircle arcuation gradually, and the end of semi arch is also reserved tangent with semi arch, the prolongation straight flange that is parallel to the base plate lower plane, wide 2 ~ the 20mm of this straight flange, in the middle of forming, it is straightway, both sides are semi-circular segments, the semi-circular segments outside also is provided with the C type structure that 2 ~ 20mm extends the similar C shaped steel of straight flange, the diameter of semi arch is the height of under casing.
Pretreated under casing top board blank is transported to the sub-material district by the running roller conveying equipment and by lateral transfer, rolls bed and be delivered to buffer area, relend the hanging device that helps railcar or be arranged on buffer area top and transfer to the openings in the ceiling station, at this station, complete the skill through hole that goes into operation of top board blank by the plasma panel cutting holes machine, complete the processing of top board.The position of through hole is corresponding with the plan weld of power transmission muscle.
While assembly welding power transmission muscle, described power transmission muscle adopts various ways, as floor cellular type power transmission muscle, truss-like power transmission muscle, net formula truss-like power transmission muscle or weldering nail interconnection system power transmission muscle.No matter adopt the power transmission muscle of which kind of form, the principle of its fixing welding is similar, and the truss-like power transmission muscle of take in the present embodiment is the welding in the present invention of example explanation power transmission muscle.The structure of truss-like power transmission muscle comprises the undulatory indented bars that is processed between reinforcing bar and lower reinforcing bar and the upper reinforcing bar of welding and lower reinforcing bar, the preprocessing welding forms truss structure, described upper reinforcing bar, lower reinforcing bar adopt square steel, and indented bars adopts Ribbed Bar.Ribbed Bar is conducive to form to hold with concrete make a concerted effort, and upper reinforcing bar, lower reinforcing bar adopt square steel to be conducive on the one hand increase bonding area, are conducive on the other hand the location of under casing top board and under casing base plate.
B2, under casing base plate 3-2 axially form the arch position limiting structure by tooling fixture limit shape positioned edge, along one group of power transmission muscle 3-3 of under casing base plate 3-2 parallel longitudinal welding, the rim of the circular-arc flange 3-2-1 of under casing base plate 3-2 both sides all is overlapped on the power transmission muscle of respective side; Tooling fixture is the arch setting along the axial direction of under casing base plate 3-2, or adopts supported at three point spacing, and the two ends of under casing base plate 3-2 are fixed, middlely by the jig higher than two ends jig 5 ~ 10mm, fixed by contour jig.
The tooling fixture of limit shape location is arch along the axial direction of under casing base plate.Concrete, the under casing base plate that is processed into the C type is rolled on bed by the driving that the vacuum cup crane is carried under casing assembly welding station, the lifting positioning tool of under casing floor below holds up base plate, described lifting positioning tool along the axial direction of base plate be middle part slightly protuberance wind up arc, the two ends of base plate by balancing weight press down, fixing; Then the lower reinforcing bar of welded truss formula power transmission muscle in axial direction on base plate, the solder joint of lower reinforcing bar is the wave trough position of indented bars, the straight flange overlapping edges of base plate, on the plane of upper liner plate, is convenient to location.After the lifting positioning tool that employing is winded up arc, the under casing welded is become wind up arc or tabular, avoid forming lower edge arc, improve the impact resistance of under casing.
The tooling fixture of limit shape location can also adopt supported at three point spacing, and namely the two ends of under casing base plate are fixed, middlely by the jig higher than two ends jig 5 ~ 10mm, fixed by contour jig.
Described power transmission muscle arranges 3 ~ 6 groups, in the parallel steel casing 3A that is distributed under casing.Wherein the power transmission muscle of both sides is symmetricly set on the junction of under casing base plate and under casing top board, and the edge of under casing base plate and under casing top board is overlapped on respectively on the plane of reinforcing bar, forms weld seam.
B3, remove tooling fixture, and the above-mentioned under casing top board 3-1 processed through perforate transferred to under casing base plate 3-2 top, and by power transmission muscle 3-3 support limit between the circular-arc flange 3-2-1 of under casing base plate 3-2 both sides; The rim of under casing top board 3-1 both sides all is overlapped on the power transmission muscle of homonymy with the rim of the circular-arc flange 3-2-1 of respective side.
B4, the plug welding through hole of reserving under casing top board 3-1, position welding formation preformed under casing by under casing top board 3-1 and power transmission muscle 3-3;
B5, the preformed under casing is axially formed to the arch position limiting structure by tooling fixture limit shape positioned edge, and the circular-arc flange 3-2-1 of under casing base plate 3-2 both sides and under casing top board 3-1 are carried out to cut weldering formation under casing 3; The circular-arc flange 3-2-1 of under casing base plate 3-2 both sides and under casing top board 3-1 are carried out to cut weldering formation integral type under casing 3 on the power transmission muscle end face of respective side; Tooling fixture is the arch setting along the axial direction of under casing base plate 3-2, or adopts supported at three point spacing, and the two ends of under casing base plate 3-2 are fixed, middlely by the jig higher than two ends jig 5 ~ 10mm, fixed by contour jig.
After completing the lower reinforcing bar positioning welding of under casing base plate and power transmission muscle, by the under casing top board by the top of the crane handling with vacuum cup to the under casing base plate, the dual-side of under casing top board is overlapped on reinforcing bar, and the position of opening on the under casing top board is corresponding with the crest location of indented bars.Edge between under casing base plate and under casing top board leaves the gap of 1 ~ 5mm, is convenient to form stable welded construction.
At first the welding of under casing top board and power transmission muscle completes the weld seam of both sides, then symmetry is welded to the inside successively.Adopting automatic submerged arc welding is adopted in the welding of under casing base plate and upper reinforcing bar.When under casing top board and the welding of power transmission muscle, also need to limit the fixing of shape positioning tool.
After completing the assembly welding of under casing, the lifting positioning tool descends, under casing drops down onto and drives that to roll bed upper, in driving, rolls under the effect of bed, under casing enters the assembly welding operation.
Now, antinode plate and top board be punch forming in another road manufacturing procedure respectively also, and wherein, the concrete operation of antinode sheet metal forming comprises:
B11, pretreated ripple plate blank material form corrugated sheet by the punching press shaping equipment punching press;
B12, corrugated sheet vertically cut both sides by the Plasma cutting machine of following the tracks of with arc voltage along corrugated sheet, form upper and lower both sides with parallel domatic antinode plate 2.
Top board can go out the wing structure in the both sides cold presswork according to the design needs, also can not process.
After the machine-shaping of antinode plate, by two be separately positioned between assembly welding station and ripple plate processing stations parallel tape transport to the assembly welding station, two parallel conveyer belts extend to the both sides of assembly welding station always.
At the assembly welding station, along the axial bilateral symmetry of under casing 3, antinode plate 2 is set, the bottom of left and right sides antinode plate 2 is parallel and weld with under casing 3, top all symmetrical outward-dipping assembly formation cross section is the power transmission gusset pair of horn mouth formula, the angle of inclination of antinode plate 2 is: 13 ° ~ 23 °, preferably 19 °, and horizontally set is strengthened gusset 4 between the antinode plate 2 of the left and right sides, the strengthening gusset is provided with two kinds of width, narrow strengthening gusset is arranged between the crest of both sides antinode plate 2, wide strengthening gusset is arranged between the trough of both sides antinode plate 2, the procedure of processing of carrying out at the assembly welding station specifically comprises:
C1, at the assembly welding station, along under casing 3 parallel longitudinals, distribute and one group of external form of positioning welding is the strengthening gusset 4 of bell mouth shape, strengthening gusset 4 positions spot welding with under casing 3;
C2, the strengthening gusset 4 bilateral symmetry antinode plate 2 is set, the inboard of antinode plate 2 all with strengthening gusset 4 positioning weldings, allowance weld between antinode plate 2 bottoms and under casing 3, strengthening gusset 4 forms the horizontal dowel of both sides antinode plate 2, and it is the power transmission gusset pair of horn mouth formula that the antinode plate 2 of both sides forms cross section by strengthening gusset 4.At first at strengthening gusset 4 one side tack-weld antinode plates 2, the strengthening of repair welding simultaneously gusset 4 and under casing 3, then position spot welding by opposite side antinode plate 2 and strengthening gusset.
C3, at the automatic welding station, along the weld seam of antinode plate 2 bottoms, antinode plate 2 and under casing 3 are reinforced to welding formation integral structure.
D1, top board 1 is lifted on to the right top of power transmission gusset: top board 1 is comprised of the daughter board of two block structure symmetries, respectively two daughter boards is lifted on to the right top of power transmission gusset, and between two daughter boards allowance weld;
D2, top board 1 and antinode plate 2 tops are positioned to spot welding, top board 1 forms preformed beam bodies with antinode plate 2 and under casing 3 assembly, and two daughter boards position a postwelding with antinode plate 2 tops respectively, form integral structures along two daughter boards of weld seam assembly welding;
D3, by preformed beam body, borrow the upset of group switching mechanism after, be transported to the automatic welding station, top board 1 and antinode plate 2 tops are reinforced to welding formation integral structure.
E: will strengthen gusset 4 and reinforce welding with both sides antinode plate 2 and top board 1, and so far complete the processing of the box composite beam of steel.
The present invention adopts pipeline system production, in factory, realized large-scale processing and the assembling of the box composite beam of steel, and the quality that is conducive to the impact of shortening the duration of bridge construction and not being subjected to natural environment processing is secure, is conducive to accomplish scale production.
Claims (13)
1. the forming method of the box composite beam of steel, described method be take steel plate as raw material respectively after roof formed, under casing moulding and antinode sheet metal forming, assembly welding forms the box composite beam of pre-manufactured steel, it is characterized in that: the concrete steps of described method comprise:
A, cut blank and carry out the blank pretreatment;
B, synchronous or asynchronous completing: under casing (3) moulding, (2) moulding of antinode plate and roof formed;
C, along under casing (3) axially bilateral symmetry antinode plate (2) is set, the bottom of left and right sides antinode plate (2) is parallel and with under casing (3), weld, top all symmetrical outward-dipping assembly to form cross section be the power transmission gusset pair of horn mouth formula;
D, form composite beam in the lifting of the right top of power transmission gusset welding top plate.
2. the forming method of the box composite beam of a kind of steel according to claim 1 is characterized in that: in described step C, also be included in horizontally set strengthening gusset (4) between left and right sides antinode plate (2), the concrete steps of described step C comprise:
C1, at the assembly welding station, along under casing (3) parallel longitudinal, distribute and one group of external form of positioning welding is the strengthening gusset (4) of bell mouth shape;
C2, the strengthening gusset (4) bilateral symmetry antinode plate (2) is set, the inboard of antinode plate (2) all with strengthening gusset (4) positioning welding, allowance weld between antinode plate (2) bottom and under casing (3), strengthening gusset (4) forms the horizontal dowel of both sides antinode plates (2), and it is the power transmission gusset pair of horn mouth formula that the antinode plate (2) of both sides forms cross section by strengthening gusset (4);
C3, at the automatic welding station, along the weld seam of antinode plate (2) bottom, antinode plate (2) and under casing (3) are reinforced to welding formation integral structure.
3. the forming method of the box composite beam of a kind of steel according to claim 2, it is characterized in that: in described step C1, strengthen gusset (4) and position spot welding with under casing (3), in step C2, at first at strengthening gusset (4) one side tack-weld antinode plates (2), the strengthening gusset of repair welding simultaneously (4) and under casing (3), then position spot welding by opposite side antinode plate (2) and strengthening gusset.
4. the forming method of the box composite beam of a kind of steel according to claim 1, it is characterized in that: the concrete steps of described step D comprise:
D1, top board (1) is lifted on to the right top of power transmission gusset;
D2, top board (1) and antinode plate (2) top are positioned to spot welding, top board (1) forms preformed beam body with antinode plate (2) and under casing (3) assembly;
D3, by preformed beam body, borrow the upset of group switching mechanism after, be transported to the automatic welding station, top board (1) and antinode plate (2) top are reinforced to welding formation integral structure.
5. the forming method of the box composite beam of a kind of steel according to claim 2, is characterized in that: after step D, also comprise step e: will strengthen gusset (4) and reinforce welding with both sides antinode plates (2) and top board (1).
6. the forming method of the box composite beam of a kind of steel according to claim 4, it is characterized in that: in described step D1, top board (1) is comprised of the daughter board of two block structure symmetries, respectively two daughter boards are lifted on to the right top of power transmission gusset, and between two daughter boards allowance weld, in step D2, two daughter boards position a postwelding with antinode plate (2) top respectively, form integral structure along two daughter boards of weld seam assembly welding.
7. the forming method of the box composite beam of a kind of steel according to claim 1, it is characterized in that: the structure of under casing in described step B (3) comprises oblate tubular steel casing (3A), vertically is welded on the power transmission muscle (3-3) between the upper and lower inner tubal wall of steel casing (3A) along steel casing (3A), based on this, the concrete technology step of under casing (3) moulding comprises:
B1, under casing base plate (3-2) and under casing top board (3-1) moulding: will carry out pretreated plane under casing base plate (3-2) blank through cold moudling crimping equipment, form the under casing base plate (3-2) that bilateral symmetry is provided with circular-arc flange (3-2-1), and on the under casing top board blank of pretreated plane, form under casing top board (3-1) with the reserved plug welding through hole of plan weldering place of power transmission muscle (2);
B2, under casing base plate (3-2) axially form the arch position limiting structure by tooling fixture limit shape positioned edge, along under casing base plate (3-2) parallel longitudinal welding one group of power transmission muscle (3-3);
B3, remove tooling fixture, and the above-mentioned under casing top board (3-1) of processing through perforate transferred to under casing base plate (3-2) top, and by power transmission muscle (3-3) support limit between the circular-arc flange (3-2-1) of under casing base plate (3-2) both sides;
B4, in the upper reserved plug welding through hole of under casing top board (3-1), under casing top board (3-1) and power transmission muscle (3-3) are positioned to welding and form the preformed under casing;
B5, the preformed under casing is axially formed to the arch position limiting structure by tooling fixture limit shape positioned edge, and the circular-arc flange (3-2-1) of under casing base plate (3-2) both sides and under casing top board (3-1) are carried out to the cut weldering form under casing (3).
8. the forming method of the box composite beam of a kind of steel according to claim 7, it is characterized in that: described power transmission muscle (3-3) is truss-like power transmission muscle, structure comprises: the upper reinforcing bar (3-2-1) be arranged in parallel and lower reinforcing bar (3-2-3) and be welded on reinforcing bar (3-2-1) and lower reinforcing bar (3-2-3) between waveform spiral bar (3-2-2), upper reinforcing bar (3-2-1) is connected with under casing top board (3-1) plug welding, lower reinforcing bar (3-2-3) is connected with under casing base plate (3-2) spot welding, and described upper reinforcing bar (3-2-1) all adopts square steel with lower reinforcing bar (3-2-3).
9. the forming method of the box composite beam of a kind of steel according to claim 7, it is characterized in that: in step B2, the rim of the circular-arc flange (3-2-1) of under casing base plate (3-2) both sides all is overlapped on the power transmission muscle of respective side; In step B3, the rim of under casing top board (3-1) both sides all is overlapped on the power transmission muscle of homonymy with the rim of the circular-arc flange (3-2-1) of respective side; In step B5, the circular-arc flange (3-2-1) of under casing base plate (3-2) both sides and under casing top board (3-1) are carried out to the cut weldering form integral type under casing (3) on the power transmission muscle end face of respective side.
10. the forming method of the box composite beam of a kind of steel according to claim 7, it is characterized in that: in described step B1, the radian of circular-arc flange (3-2-1) is 170 ° ~ 190 °; The end of circular-arc flange (3-2-1) is provided with the straight flange that is parallel under casing base plate (3-2) lower plane, and the width of this straight flange is 2 ~ 20mm; In described step C, the angle of inclination of antinode plate (2) is: 13 ° ~ 23 °.
11. the forming method of the box composite beam of a kind of steel according to claim 7, it is characterized in that: in described step B2 or B5, tooling fixture is the arch setting along the axial direction of under casing base plate (3-2), perhaps adopt supported at three point spacing, the two ends of under casing base plate (3-2) are fixed, middle by the jig higher than two ends jig 5 ~ 10mm, are fixed by contour jig.
12. the forming method of the box composite beam of a kind of steel according to claim 2, it is characterized in that: described strengthening gusset is provided with two kinds of width, narrow strengthening gusset is arranged between the crest of both sides antinode plates (2), and wide strengthening gusset is arranged between the trough of both sides antinode plates (2).
13. the forming method of the box composite beam of a kind of steel according to claim 1 is characterized in that: in described step B, the concrete technology step of antinode plate (2) moulding comprises:
B11, pretreated ripple plate blank material form corrugated sheet by the punching press shaping equipment punching press;
B12, corrugated sheet vertically cut both sides by the Plasma cutting machine of following the tracks of with arc voltage along corrugated sheet, form upper and lower both sides with parallel domatic antinode plate (2).
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| CN103758020A (en) * | 2013-12-25 | 2014-04-30 | 广西科技大学 | Preparation technology for corrugated steel web combined box girder |
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