CN202099719U - Steel truss bridge - Google Patents

Steel truss bridge Download PDF

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Publication number
CN202099719U
CN202099719U CN 201120165721 CN201120165721U CN202099719U CN 202099719 U CN202099719 U CN 202099719U CN 201120165721 CN201120165721 CN 201120165721 CN 201120165721 U CN201120165721 U CN 201120165721U CN 202099719 U CN202099719 U CN 202099719U
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China
Prior art keywords
steel
chord
web
girder bridge
segmentation
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CN 201120165721
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Chinese (zh)
Inventor
钱志忠
顾晓付
马顺忠
苏中海
卢利杰
狄春良
李水明
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Jiangsu Huning Steel Mechanism Co Ltd
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Jiangsu Huning Steel Mechanism Co Ltd
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Priority to CN 201120165721 priority Critical patent/CN202099719U/en
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Abstract

The utility model discloses a steel truss bridge, which comprises a steel box girder bridge deck, a main joist and a steel frame. The main joist consists of two steel trusses, each steel truss comprises top booms, bottom booms and web members, two ends of each web member are respectively inserted in each top boom and each bottom boom and are connected with the top boom and the bottom boom via bolts, a sidewalk bracket is disposed on the outer side of each steel truss, the bottom booms are respectively connected with the steel box girder bridge deck and the sidewalk brackets in a bolted and welded connection mode, and the two steel trusses are connected together via the steel frame. The steel truss bridge completely meets design requirements, and stability and safety factor of the bridge can be improved.

Description

A kind of steel girder bridge
Technical field
The utility model relates to a kind of bridge, is a kind of steel girder bridge specifically.
Background technology
Canal, Hangzhoupro, capital is a gold navigation channel.One of Wuxi section leg that shipping is the busiest, frequency of freight is maximum, the shipping benefit is best completely especially.Wuxi section canal ship reached 1.97 hundred million tons through amount in 2010; Year volume of goods transported is equivalent to four or five single line Shanghai and Nanjing railways (Wuxi section); Five or six times of Shanghai and Nanjing speedway (Wuxi section) volume of goods transported become the economic lifeline waterborne that supports Wuxi urban construction and even Yangtze River Delta integrative development.
Main road, the Wuxi City Taihu Lake deficient bridge of gold, should be built across the bridge on the canal based on the particularity of this position then across being positioned on the section of Wuxi, canal, Hangzhoupro, capital, can not influence the normal navigation in navigation channel again; Through the relatively comprehensive and final steel girder bridge of confirming a lower support type steel truss girder+steel box-beam structure system of design of demonstration, this steel truss spanning directly is arranged as 55m+105m+55m=215m, and bridge floor is that two-way eight tracks, both sides are nonmotorized vehicle lane and sidewalk.Main truss is made up of two steel trusss, main truss centre distance 33m, and the centre is a steel box girder bridge face, wide 30m, the cantilever bracket of respectively choosing 5.9m in the outside of two main trusses supports nonmotorized vehicle lane and sidewalk, bridge floor overall width 46.0m.
If adopt traditional assembling process loaded down with trivial details; And at the scene during assembly unit setting accuracy be difficult to guarantee; If so can not satisfy the requirement of construction period far away, and in operating process, need the workpiece Left on/Left off have been increased security risk so again according to traditional assembling process.
The utility model content
Goal of the invention: in order in work progress, to reduce the influence to the navigation channel to the full extent, the purpose of the utility model is to provide a kind of rational in infrastructure, safe steel girder bridge.
Technical scheme: for realizing above-mentioned technical problem; The technical scheme that the utility model adopts is: a kind of steel girder bridge; The main truss and the steel door frame that comprise steel box girder bridge face, form by two steel trusss; Said steel truss comprises upper chord, lower chord and web member, and the two ends of said web member are inserted in respectively in upper chord, the lower chord and through bolt and connect; The outside at every steel truss is provided with sidewalk bracket; Said lower chord is connected with steel box girder bridge face, sidewalk bracket respectively through bolt weldering connected mode; Two steel trusss link together through steel door frame.Wherein the height of every steel truss adopts the second-degree parabola version, two end bay rises be 3m, in to stride rise be 10.5m, the high 17m in central bearing point place.
Said upper chord is divided into 24 segmentations, between segmentation and the segmentation through around full bolt be connected; Each segmentation is box section rod member with ribbing.
Said lower chord is divided into 23 segmentations, between segmentation and the segmentation through around full bolt be connected, each segmentation is the type of encorbelmenting box section rod member with ribbing.
The cross section of said web member is H shape.
Said steel box girder bridge face comprises top board, base plate, vertical web, diaphragm, stiffener; Top board end opening broad ways is distributed with many U-shaped ribs, and base plate upper edge width is distributed with many U-shaped ribs; Vertically web is arranged along the bridge deck width direction; Vertically web is provided with elongated horizontal stiffener; Diaphragm distributes along the bridge floor length direction, arranges one grade of horizontal stiffener, vertical stiffener and manhole on the diaphragm, and every grade of diaphragm is divided into five that differ in size through vertical web.
Said steel door frame comprises horizontal upper chord, middle web member, curved bottom chord, adopts bolt to connect between separately.
The preparation method of above-mentioned steel girder bridge, this method may further comprise the steps:
A) make steel truss: at first select steel according to designing requirement; Make upper chord and lower chord then respectively; During making; Upper chord and lower chord are carried out segmentation, and then are segmented into the unit with each and make separately respectively, each chord member all be according to by the plate unit in the processing sequence of closing up process;
B) drilling of the intersegmental bolt hole of branch: behind each sectional making of steel truss, the drilling of end elder generation is all adopted at both ends, the method for drilling behind the end, and first drilling one end adopts the draw point line, the drill jig location, magnetic drill press or radial drill overlap brill;
C) the preparatory assembly unit of steel truss: at first carry out the ground line, the assembly unit moulding bed; On moulding bed, wind up the successively then location of segmentation, the location of lower chord segmentation, the location of web member; Between each segmentation and between web member and upper chord, the lower chord junction plate is being installed all then; Behind the junction plate installation in position, in boring procedure, junction plate generation skew occurs, adopt magnetic drill press respectively with each 4-5 hole of bolt hole crowd preboring; Hole of every brill all adopts special pin bolt to fix, then adopt radial drill or magnetic drill press carry out around full position join brill;
D) make steel box girder bridge face: at first carry out the division of plate unit, and each plate unit is numbered respectively; That carries out each sections plate unit of steel case beam then respectively in advance closes up dress weldering for a short time, and qualified back is divided section on the overall package moulding bed, to adopt just to make the method round to close up dress in carrying out to weld;
E) each sections with steel box girder bridge face carries out preparatory assembly unit with corresponding lower chord respectively;
F) make steel door frame: at first carry out the integral installation weldering of steel door frame, adopt special tooling to carry out boring then, and carry out the integral body brill system in steel door frame end bolt hole with the cover of main couple.
In the step a), the material of said steel truss is carried out preliminary treatment, its process is: leveling → impeller blasting → spray paint → dry.Wherein the purpose of leveling is to eliminate the permanent set and the rolling internal stress of minimizing of steel plate, thereby can reduce the distortion in the manufacture process.
Beneficial effect: compared with prior art, the steel girder bridge of the utility model can adhere to specification fully, and structure is superior to structural bridges such as cable stayed bridge, suspension bridge; Can improve the stability and the safety factor of bridge; Adopt the described manufacturing approach of the utility model, the location is accurate, the risk in the time of reducing on-site consolidation, and can the reduction of erection time.
The steel girder bridge of the utility model can meet the requirement of design specifications fully; Can improve the stability and the safety factor of bridge; Especially at the scene in the work progress; Any falsework need be set in the river course, can reduce to the full extent can also its crudy be promoted to higher level the normally current influence of canal ship; Through adopting the manufacturing approach of the utility model, effectively guarantee its due crudy, the accuracy when guaranteeing on-the-spot the installation, the risk in the time of reducing on-the-spot the installation greatly simultaneously also can the reduction of erection time.
Description of drawings
Fig. 1 is the structural representation of the utility model steel girder bridge;
Fig. 2 is the structural representation that 1/2 steel truss segmentation is divided;
Fig. 3 is the wind up sketch map that is connected of segmentation and lower edge segmentation of steel truss;
Fig. 4 is the steel truss node enlarged drawing that winds up;
Fig. 5 is a steel truss lower-chord panel point enlarged drawing;
Fig. 6 is the structural representation of upper chord;
Fig. 7 is the structural representation of lower chord;
Fig. 8 is the structural representation of steel box girder bridge face.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done explanation further.
Extremely shown in Figure 8 like Fig. 1; A kind of steel girder bridge; The main truss and the steel door frame 6 that comprise steel box girder bridge face 1, form by two steel trusss, the height of every steel truss adopts the second-degree parabola version, two end bay rises be 3m, in to stride rise be 10.5m, the high 17m in central bearing point place; Wherein steel truss comprises upper chord 2, lower chord 3 and web member 4, and the two ends of web member 4 are inserted in respectively in upper chord 2, the lower chord 3 and through bolt and connect; Be provided with sidewalk bracket 5 in the outside of every steel truss; Lower chord 3 is connected with steel box girder bridge face 1, sidewalk bracket 5 respectively through bolt weldering connected mode.Wherein steel door frame 6 comprises horizontal upper chord, middle web member, curved bottom chord, adopts bolt to connect between separately.
Steel truss lower chord 3 has all adopted welding integral node structure form with upper chord 2 each segmentation; The upper and lower chord member of steel truss adopts box-type section; Upper chord 2 cross sections are 2215X1200X (20~28) X (20~32), and lower chord 3 cross sections are 1500X1200X (20~36) X (20~32); Steel truss diagonal web member and perpendicular web member all adopt the welded H tee section, and sectional dimension is H1200X500X24X24, H1200X700X24X24, H1200X500X28X32, H1200X700X28X32, H1200X700X32X32, H1200X1100X32X40, H1200X760X32X32 etc.;
Upper chord 2 main employings box section rod member with ribbing, upper chord 2 has all adopted integral node plate structure with web member 4 links, and has adopted plug-type bolt method of attachment between web member 4 and upper chord 2 gusset plates; Segmentation in the upper chord 2 then is the form that has all adopted full bolt to connect all around with dividing intersegmental being connected; Compare with upper chord 2; Lower chord 3 structures connect relatively complicated; Gusset plate is identical with upper chord 2 with the connection of 4 of web members; Segmentation in the lower chord 3 also is the form that has all adopted full bolt to connect all around with dividing intersegmental being connected, but has increased the part of encorbelmenting that is connected with bridge floor in lower chord 3 both sides, promptly adopts the bolt welding manner to be connected with steel box girder bridge face 1 and bridge floor sidewalk bracket 5 respectively.
Steel box girder bridge face 1 length overall 215m, width is 30m, depth of section 2.21-2.45m, wherein top board is provided with 1.5% slope, heavily about 3580 tons.Steel box girder bridge face 1 mainly is formed by combining top board, base plate, vertical web, diaphragm, U-shaped rib, stiffener.The steel case back plate end opening broad ways 48 U-shaped ribs that distributed, U-shaped rib center are opened shelves and are of a size of 600-900 and do not wait; The base plate upper edge width 36 U-shaped ribs that distributed, U-shaped rib center are opened shelves and are of a size of 640-1075 and do not wait.Steel case beam has been arranged the elongated vertical web of fourth gear along the bridge deck width direction, and the centre is opened shelves and is of a size of 2.8m, and both sides are opened shelves and are of a size of 12.25m.Vertically be provided with five elongated horizontal stiffeners on the web, open shelves and be of a size of 400mm.Steel case beam is along the bridge floor length direction 84 grades of diaphragms that distributed; Diaphragm is opened grade size and is not waited by 2.3m-2.8m; One grade of horizontal stiffener, vertical stiffener and manhole etc. have also been arranged in addition on the diaphragm; Every grade of diaphragm is divided into five that differ in size by vertical web, and wherein grade size of opening of vertical stiffener is about 1.8m.
The preparation method of above-mentioned steel girder bridge is following:
The first step; Make steel truss: at first select steel according to designing requirement; Make upper chord 2 and lower chord 3 then respectively, during making, upper chord 2 and lower chord 3 are carried out segmentation; And then be segmented into the unit with each and make separately respectively, each chord member all be according to by the plate unit in the processing sequence of closing up process.In processing and making process, line all adopts draw point to rule, and guarantees the line precision of installation site; Adopt various frocks to guarantee the precision of assembling during assembling; Adopt the welding method in less heat input, symmetry, the branch to reduce welding deformation as much as possible during welding; Adopt hydraulic press or flame to correct during rectification; The method that adopts numerical control and drill jig cover to bore during boring is guaranteed the precision in high-strength bolt hole, sets up successive check, and elaborates, and improves the machining accuracy of single-piece, then on the preparatory assembly unit moulding bed of integral body, divides section to carry out preparatory assembly unit;
Upper chord 2 is divided into 24 segmentations, and wherein A1A2-A11A12 is symmetrical respectively makes each 1, and the middle part is segmented into A12A13, A13A12 ' and respectively makes 1.Lower chord 3 is divided into 23 segmentations, and wherein E0E1-E10E11 is symmetrical respectively makes each 1, and the middle part is segmented into E11E11 ' and makes 1.
Second step, the preparatory assembly unit of steel truss: at first carry out the ground line, the assembly unit moulding bed; On moulding bed, wind up the successively then location of segmentation, the location of lower chord 3 segmentations, the location of web member 4; Between each segmentation and between web member 4 and upper chord 2, the lower chord 3 junction plate 7 is being installed all then; Behind junction plate 7 installation in position, in boring procedure, junction plate 7 generation skews occur, adopt magnetic drill press respectively with each 4-5 hole of bolt hole crowd preboring; Hole of every brill all adopts special pin bolt to fix, and then adopts radial drill or magnetic drill press to carry out full position and joins brill.
In the 3rd step, make steel box girder bridge face 1: at first carry out the division of plate unit, and each plate unit is numbered respectively; That carries out each sections plate unit of steel case beam then respectively in advance closes up dress weldering for a short time, and qualified back is divided section on the overall package moulding bed, to adopt just to make the method round to close up dress in carrying out to weld.
According to the on-site hoisting requirement, it is divided into 23 sections, be respectively sections A~sections L.Wherein sections A~sections K is 2 respectively, and sections L is 1, divides intersegmental top, base plate all to adopt welding, and U type rib on top, the base plate, vertically stiffener is mended section and connected through making embedding on the web, and vertically web connects and adopts bolt.
The numbering principle of each plate unit is: all sections plate unit are all with this sections beginning of letter, and bottom board unit is as the criterion with the bridge floor center line, and centerline unit board suffix is A0, therefrom are followed successively by A1~A6 left, therefrom are followed successively by B1~B6 to the right; The top board unit is as the criterion with the bridge floor center line, therefrom is followed successively by C1~C6 left, therefrom is followed successively by D1~D6 to the right; It is all identical that all sections push up, bottom board unit is divided the position.
In the 4th step, each sections of steel box girder bridge face 1 is carried out preparatory assembly unit with corresponding lower chord 3 respectively.
In the 5th step, make steel door frame: at first carry out the integral installation weldering of steel door frame 6, adopt special tooling to carry out boring then, and carry out the integral body brill system in steel door frame 6 end bolt holes with the cover of main couple.
In the utility model, the used steel material of steel truss is Q340QD, and the material of steel truss is carried out preliminary treatment, and its process is: leveling → impeller blasting → spray paint → dry.Can avoid occurring in the process edges of boards difference shadow like this to the crudy of member and the quality of connection of high-strength bolt, simultaneously, the planeness of steel plate face also can obtain strict control.The purpose of leveling is to eliminate the permanent set and the rolling internal stress of minimizing of steel plate, thereby can reduce the distortion in the manufacture process.Adopt the steel plate special pre-treatment production line that steel plate is eliminated rust, spray shop primer and oven dry guarantee that the rust cleaning quality of steel reaches the Sa2.5 level.
In order to guarantee that steel plate is out of shape in preprocessing process hoisting steel plate process, all adopt the magnetic force handling to send steel plate, avoid the lifting of tiger head card to make steel plate produce local plastic deformation.
Placing of manufacture craft surplus requires as follows:
1), upper and lower chord member intersegmental butt joint gap length of each minute differs in the deepen drawing, for ease of the processing and fabricating and the on-the-spot installation in workshop, it is adjusted into: upper chord 2 each overlap span unification are adjusted into 30mm; Lower chord 3 each overlap span unification are adjusted into 25mm, and during the adjustment of gap, gusset plate one side section length is constant, carries out corresponding increase and decrease in the butt end with it in the opposite side segmentation.
2), upper and lower chord member box-girder is benchmark with the knuckle point, two ends respectively place the 20mm surplus.
3), its height (internal arm is of a size of 1200mm) places 6mm and mills the limit surplus during upper and lower chord member box-girder internal partition blanking, width places 4mm and mills the limit surplus, machine mill behind the limit its dividing plate appearance and size should satisfy width+0.5~+ 1mm; Highly+2~+ 2.5mm.
4), the upper and lower panel of upper chord 2 each segmentation, the top panel of lower chord 3 each segmentation, its width when setting-out, blanking (width is the direction of 1200mm) all places 2mm welding allowance for shrinkage.
5), all sections tops of steel box girder bridge face 1, base plate are along the bridge deck width direction, both sides place the 30mm surplus respectively.
6), the sections A~K length direction of steel box girder bridge face 1 all with the knuckle end for just holding, the other end places 30mm surplus (vertically web is identical with it), treats to cut behind the segmentation dress seam lattice.Steel box girder segment L length direction one is rectified and is done, and the other end places the 100mm surplus, and the scene is joined and cut.
7), during the diaphragm setting-out in the steel box girder bridge face 1, place 0.5 ‰ welding allowances for shrinkage along the bridge deck width direction, wherein the U-lag mouth is opened the corresponding amplification of shelves; In addition 1mm is respectively amplified in each U-shaped rib notch both sides, in order to the dress weldering.
8), the vertical web height direction in the steel box girder bridge face 1 places 2mm welding allowance for shrinkage.
In the utility model; The control of borehole accuracy: the manufacturing borehole accuracy of this special full bolt steel truss girder is the institute that guarantees the key of the stressed and whole one-tenth bridge of structural entity line style precision; The high-strength bolt hole method for drilling of box-girder end, steel purlin; No gusset plate one end employing high-precision numerical control machine is made special-purpose drill jig (bolt aperture and pitch-row Deviation Control are within 5) and is overlapped brill boring in advance; The other end and adjacent sectional are joined the method for brill and are processed, and segmentation is joined brill and must after branchs round assembling on the assembling moulding bed in advance is qualified, be carried out once full the position and join drilling bore hole.The integral body of carrying out bolt hole through special tooling between steel door frame 6 and the main couple is joined brill.
The machining control emphasis of steel box girder bridge face 1 is following:
When 1, the plate unit made, whole bed board adopted steel band to unify, install U-shaped rib (U type rib inside should be carried out application in advance), adopts model to detect simultaneously, and each plate unit, qualified back welds on special-purpose reversible deformation welding positioner respectively, guarantees its precision.
2, the integral smoothness of base plate and U rib are opened a grade size Control:
Grade size of opening for U-shaped rib between effective control base plate plate unit; In can adjacent two boards unit be spliced in advance before closing up, put certain welding contracted quantity and angular deformation in advance, to be welded also can grasp welding contraction and angular deformation amount actual between jigsaw after several; Then carry out assembly unit again; Longitudinal joint places by the actual welding amount of contraction between each plate unit, suitably corrects, thereby controls the planeness of opening grade size and plate face of base plate U-shaped rib.
3, the control of diaphragm unit precision:
Adopt digital controlling plasma to cut during the diaphragm blanking; The cutting back adopts special-purpose model to check; The welding method that adopts CO2 gas guarantor weldering to be equipped with little electric current, small voltage when stiffener and diaphragm welding is welded, and effectively reduces welding deformation, the quality of control diaphragm unit.
4, steel box girder bridge face 1 Angular Deformation Control:
The longitudinal seam welding meeting of top board unit causes certain Welding Angular Deformation; The solution of this Welding Angular Deformation is: on the basis of guaranteeing moulding bed making precision; On moulding bed, set up backing plate in addition in addition, produce a reversible deformation, to offset the distortion that the top board welding is caused.
5,1 fen intersegmental interface safeguard measure of steel box girder bridge face:
A), when steel box girder bridge face 1 is made, adopt several segmentations integral assembling together, assembling and welding all adopt identical method to carry out, and reserve one section at the segmentation interface in addition and do not weld, and treat that segment group to qualified laggard row welding, guarantees the concordant of the intersegmental butt joint of branch;
B), two segmentation interfaces one rectify and do, the other end places surplus joins and cuts, and guarantees the interface weld gap;
C), divide the bolt hole of intersegmental vertical web, just doing end boring in advance, the other end can be made qualified back in adjacent sectional and adopt on-the-spot junction plate 7 to join brill, guarantees the quality of web bolt.
6, the interface safeguard measure between steel box girder bridge face 1 and steel truss:
A), steel box girder bridge face 1 in dress weldering process, the both-side opening place suitably adds interim support and strengthens, guarantee with steel truss between be connected open a grade size;
B), steel box girder bridge face 1 both sides reserve to join and cut surplus, treat the casing welding, correct and cut after qualified again, guarantee the weld gap with the steel truss interface;
C), the diaphragm that is connected with steel truss of steel box girder bridge face 1, carry out location just during installation earlier, accurate location again when treating to piece together in advance; Welding then; Adopt on-the-spot junction plate 7 that its bolt hole is overlapped brill simultaneously, wherein steel truss junction plate 7 drilling, the also drilling in advance of on-the-spot junction plate 7; Bore behind the steel box girder bridge face 1 avris junction plate, with the precision that guarantees that diaphragm connects.
It is accurate that making through upper chord 2 segmentations specifies the location of the utility model steel girder bridge preparation method below.
Upper chord 2 each segmented structure are: comprise the casing that is formed by top panel, lower panel, left web, right web, front and back technology grid spacer; In casing, be provided with the multi-disc internal partition; All be welded with the stiffener that axially is provided with along each plate in the above on plate, lower panel, left web, the right web; On every internal partition, have and the corresponding groove in stiffener position, stiffener vertically inserts in the groove; Be drilled with the high-strength bolt hole in the end of left and right web.
Be segmented into the manufacturing approach that example is explained upper chord 2 with A1A2 in the upper chord 2, specific as follows:
1), the setting of surface based directrix and moulding bed:
The line of a, surface based directrix:
At first, mark center line, appearance profile line, the spacer lines of casing on the ground according to the actual projection size of chord member casing;
The making of b, special-purpose assembling moulding bed:
The setting of moulding bed template must guarantee that the location of member is convenient and safe reliable.Therefore special-purpose locating template need be set, the moulding bed template must adopt Numerical control cutting, to guarantee the assembling positioning accuracy of moulding bed;
Moulding bed height and levelness thereof must be controlled at ± 1mm in, carry out strictness control according to the data that packaging technology figure provides, moulding bed must can use after full-time inspector's acceptance(check).
2), the making of each plate:
The location of a, left web:
The web of splicing after qualified hung on the assembling moulding bed position, location leading web cross centre line must be rule in advance, as the benchmark of location;
During the location with himself center line to flush with ground centre of location line, control the goodness of fit of its end and ground location simultaneously, it is firm that meet the requirements back and moulding bed carry out spot welding;
The assembling of b, stiffener:
Stiffener is hung on the assembling moulding bed position, must strict its uniform angle of control during the location.
The welding of c, stiffener:
After stiffener and web location are qualified, carry out self check and examine mutually, confirm that the full-time inspector of correct back submission carries out an acceptance inspection; Can weld after qualified, when welding between stiffener and web, adopt the even numbers welder to carry out the symmetry welding; In order effectively to reduce the integral solder distortion, CO is adopted in welding 2Gas shiled weldering automatic vehicle welds, and to guarantee welding quality, postwelding carries out the cleaning and the defect detecting test of weld seam.
3), the line of internal partition position line:
After a, web location is qualified, mark the position location line of dividing plate and upper and lower panel, adopt the draw point line during line, delimited the accuracy of bit line to guarantee at the web inner surface;
B, line the time need be considered form of structure, suitably place the welding allowance for shrinkage, should carry out self check after the line and examine mutually, can use after correct, and the peripheral 30mm scope of institute's bit line of delimiting domestic demand is polished, and weld in order to the dress of each component.
4), the location of internal partition:
A, internal partition, the technology dividing plate of limit after qualified dug in machine hang on the assembling moulding bed and position, internal partition, technology dividing plate cross centre line must be rule in advance before the location, as the benchmark of location;
With its internal partition self center line alignment web centre of location line, control the goodness of fit of vertical both sides of its internal partition and web simultaneously when b, location, it is firm that meet the requirements back and web carry out spot welding;
Casing internal partition and technology dividing plate adopt the numerically-controlled precise cutting; It is flat to adopt level(l)ing machine to spoil before the blanking; Prevent the steel plate injustice and influence cut quality; Its width places 4mm and mills the limit surplus during dividing plate blanking, highly places 6mm and mills the limit surplus, and its dividing plate appearance and size should satisfy width+0.5-+1mm after the limit was milled in machine; Highly+2-+2.5mm.
5), the location of top panel:
A, will process top panel unit after qualified and hang on the assembling moulding bed and position, cross centre line must be rule in advance before the location, as the benchmark of horizontal location;
B, when location to flush with ground centre of location line, control the goodness of fit of its end and ground location with himself center line simultaneously, and it is firm that meet the requirements back and internal partition and web carry out spot welding.
6), the location of right web:
A, will process right web after qualified and hang on the assembling moulding bed and position, cross centre line must be rule in advance before the location, as the benchmark of location;
B, when location to flush with ground centre of location line, control the goodness of fit of its each end and ground location with himself center line simultaneously, and it is firm that meet the requirements back and internal partition and top panel carry out spot welding.
7), the welding of internal framework:
After casing opposite side web and top panel and internal partition location are qualified; Carry out self check and examine mutually, confirm that correct back submits to full-time inspector to carry out an acceptance inspection, can weld after qualified; When welding between internal partition and casing face web; Adopt the even numbers welder to carry out the symmetry welding, in order effectively to reduce the integral solder distortion, CO is adopted in welding 2The gas shiled weldering, to guarantee welding quality, postwelding carries out the cleaning and the inspection of weld seam.
8), the location of lower panel:
A, will process lower panel unit after qualified and hang on the assembling moulding bed and position, cross centre line must be rule in advance before the location, as the benchmark of location;
B, when location to flush with ground centre of location line, control the goodness of fit of its each end and ground location with himself center line simultaneously, and it is firm that meet the requirements back and internal partition and web carry out spot welding.
9), measure, correct:
Can measure after casing welding inspection is qualified, correct; Because the casing accuracy of manufacture is had relatively high expectations; Then the casing after the welding should be placed at and carries out careful detection on the horizontal moulding bed, with the parallelism of plumb bob and each port of backguy method measurement casing and verticality, straightness accuracy etc., corrects for undesirable flame or the machinery of should adopting; Until meeting the assembly unit tolerance, the reference line of casing is then revised if any deviation.
10), the end machine is milled flat:
A, be the assembly precision and the field erected precision of guard box beam of control cabinet beam; The left and right both ends of the surface of case beam must be carried out the end face machine; The making ERROR CONTROL of member in minimum zone, is guaranteed the installation accuracy of total and the installation progress of on-the-spot steel work;
B, the machine of case beam-ends face adopt mechanical driver unit to carry out facing cut processing, and through the end face machine to the case beam, it is vertical each other with case beam axial line that case beam both ends of the surface are guaranteed.
11), reorientating of casing:
A, when location to flush with ground centre of location line, control the goodness of fit of its each end and ground location with himself center line simultaneously, and the laggard spot welding that meets the requirements is firm;
After b, casing location was qualified, the producer must adopt H shape steel to detect frock and shelves are left in web member 4 connecting portion inboards detect, and during detection frock is carried out slippage by the connectivity port to the U-shaped inboard, should repair if any deviation.
12), the line in end high-strength bolt hole:
The accurate line of port bolt hole is carried out by the full-time line personnel in metalworking workshop in a, qualified back, body location, adopts the draw point line during line, is delimited the accuracy of bit line to guarantee;
Must submit to full-time Quality Inspector to carry out an acceptance inspection after b, line are accomplished, the cover that qualified back adopts template to carry out bolt hole bores.
13), the boring in high-strength bolt hole:
The bushing plate after qualified hung on casing and positions with machine after the boring of a, datum hole was accomplished; During the location bushing plate cross centre line alignment casing is located cross hairs; Adopt jig to be fixed then; Then hole, in addition, after the first few hole drill is intact, can adopt the frock pin bolt to fix;
After b, employing frock bearing pin were fixed, visual actual conditions adopted magnetic drill press or radial drilling machine to hole, and bushing plate must regularly carry out the inspection of drill bushing diameter, changes during drill bushing diameter overgauge aperture 0.3mm.The length of screw portion superposes more than the gross thickness 5mm less than bushing plate and wallboards of box body in the frock pin bolt, and screw diameter is less than aperture 0.1mm.
14), integrality is checked and accepted:
A, flaw detection hang on moulding bed once more with casing after qualified and position, and with preceding identical, the levelness of moulding bed must be checked once more again, is that benchmark carries out with the casing center line still during the location, its method with before identical;
Behind b, the casing location, the producer carries out comprehensive and careful measurement to each port major control size of casing, overproof should the finishing, and qualified back is submitted to full-time inspector and management in the factory to carry out integrality and is checked and accepted.The method that adopts ground appearance method and total powerstation to combine during examination is carried out, effectively the quality of control member processing.
Be the welding requirements of casing below:
Welding finishes, and all weld seams must carry out visual inspection, and crackle must not be arranged, and incomplete fusion, slag inclusion, does not fill up arc crater and exceeds the defective of following table regulation.
Weld appearance quality specifications (mm)
Annotate: 10% of manual fillet weld total length allows h 1+ 3.0-1.0.
After visual inspection was qualified, the full penetration welding line between component should carry out nondestructive testing after 24 hours.Carry out ultrasonic testing/ ultrasonic examination, the internal soundness classification should meet the regulation of following table.Other technical requirements can be carried out by existing steel weld seam manual ultrasonic result of detection classification (GB11345).
Weld seam supersonic detection internal soundness grade
Weld seam supersonic detection scope and inspection level should meet the regulation of following table.
Weld seam supersonic detection scope and inspection level (mm)

Claims (7)

1. steel girder bridge; It is characterized in that; The main truss and the steel door frame (6) that comprise steel box girder bridge face (1), form by two steel trusss; Said steel truss comprises upper chord (2), lower chord (3) and web member (4), and the two ends of said web member (4) are inserted in respectively in upper chord (2), the lower chord (3) and through bolt and connect; Be provided with sidewalk bracket (5) in the outside of every steel truss; Said lower chord (3) is connected with steel box girder bridge face (1), sidewalk bracket (5) respectively through bolt weldering connected mode; Two steel trusss link together through steel door frame (6).
2. steel girder bridge according to claim 1 is characterized in that, said upper chord (2) is divided into 24 segmentations, between segmentation and the segmentation through around full bolt be connected; Each segmentation is box section rod member with ribbing.
3. steel girder bridge according to claim 1 is characterized in that, said lower chord (3) is divided into 23 segmentations, between segmentation and the segmentation through around full bolt be connected, each segmentation is the type of encorbelmenting box section rod member with ribbing.
4. steel girder bridge according to claim 1 is characterized in that, the cross section of said web member (4) is H shape.
5. steel girder bridge according to claim 1 is characterized in that, said steel box girder bridge face (1) comprises top board, base plate, vertical web, diaphragm, stiffener; Top board end opening broad ways is distributed with many U-shaped ribs, and base plate upper edge width is distributed with many U-shaped ribs; Vertically web is arranged along the bridge deck width direction; Vertically web is provided with elongated horizontal stiffener; Diaphragm distributes along the bridge floor length direction, arranges one grade of horizontal stiffener, vertical stiffener and manhole on the diaphragm, and every grade of diaphragm is divided into five that differ in size through vertical web.
6. steel girder bridge according to claim 5 is characterized in that, said steel box girder bridge face (1) is divided into 23 segmentations, and segmentation is adopted welding with dividing intersegmental top, base plate, vertically adopts bolt between web.
7. steel girder bridge according to claim 1 is characterized in that, said steel door frame (6) comprises horizontal upper chord, middle web member, curved bottom chord, adopts bolt to connect between separately.
CN 201120165721 2011-05-23 2011-05-23 Steel truss bridge Expired - Lifetime CN202099719U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102277825A (en) * 2011-05-23 2011-12-14 江苏沪宁钢机股份有限公司 Steel truss bridge and method for fabricating same
CN104328734A (en) * 2013-07-22 2015-02-04 中铁工程设计咨询集团有限公司 Multi-connection and multi-span continuous steel truss girder bridge and construction method thereof
CN107199437A (en) * 2016-03-16 2017-09-26 中铁十五局集团有限公司 A kind of steel anchor beam section preparation method
CN109175612A (en) * 2018-10-31 2019-01-11 山东临工工程机械有限公司 High-intensitive strength weld welding method
CN109208486A (en) * 2018-10-19 2019-01-15 江苏京沪重工有限公司 Joining section manufacturing process between a kind of Steel Bridge top plate
CN109811653A (en) * 2019-02-27 2019-05-28 中铁大桥勘测设计院集团有限公司 A kind of Multi-point supporting integrated deck system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102277825A (en) * 2011-05-23 2011-12-14 江苏沪宁钢机股份有限公司 Steel truss bridge and method for fabricating same
CN102277825B (en) * 2011-05-23 2014-02-26 江苏沪宁钢机股份有限公司 Steel truss bridge and method for fabricating same
CN104328734A (en) * 2013-07-22 2015-02-04 中铁工程设计咨询集团有限公司 Multi-connection and multi-span continuous steel truss girder bridge and construction method thereof
CN107199437A (en) * 2016-03-16 2017-09-26 中铁十五局集团有限公司 A kind of steel anchor beam section preparation method
CN107199437B (en) * 2016-03-16 2019-06-07 中铁十五局集团有限公司 A kind of steel anchor beam segment preparation method
CN109208486A (en) * 2018-10-19 2019-01-15 江苏京沪重工有限公司 Joining section manufacturing process between a kind of Steel Bridge top plate
CN109175612A (en) * 2018-10-31 2019-01-11 山东临工工程机械有限公司 High-intensitive strength weld welding method
CN109811653A (en) * 2019-02-27 2019-05-28 中铁大桥勘测设计院集团有限公司 A kind of Multi-point supporting integrated deck system

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