CN101691787B - Converse construction process for middle-high steel structure building - Google Patents
Converse construction process for middle-high steel structure building Download PDFInfo
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- CN101691787B CN101691787B CN2009100755299A CN200910075529A CN101691787B CN 101691787 B CN101691787 B CN 101691787B CN 2009100755299 A CN2009100755299 A CN 2009100755299A CN 200910075529 A CN200910075529 A CN 200910075529A CN 101691787 B CN101691787 B CN 101691787B
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Abstract
The invention relates to a converse construction process for the middle-high steel structure building, belonging to the steel structure system construction field and aiming at solving the problems that the construction surfaces are less, the construction efficiency is low, the construction period is long and the manufacturing of the steel structure components can not meet the integral mounting quality standard requirements because the steel floorslabs and the steel structure frameworks are constructed synchronously during the construction of the prior steel structure building. The converse construction process for the middle-high steel structure building comprises the following steps: refining and enlarging the connection nodes of the steel structure frameworks; processing and assembling the steel structure components according to the enlarged construction drawing; transporting and stacking the steel structure components; mounting the steel structure frameworks; and moungin the steel floorslabs. Because the converse construction process of mouting the main structures of all the steel structure frameworks before the mouting the steel floorslabs is adopted, the steel structure frameworks and the steel floorslabs can be constructed on the same plane and can be constructed in a vertical and cross way without mutual influence, the construction speed can be accelerated, and the construction efficiency can be improved. The converse construction process is simple, convenient, economical, reasonable, safe and reliable, ensures high mounting precision and can be applied to the construction of various middle-high steel structure buildings.
Description
Technical field
The present invention relates to steel building system construction field, be specially the reverse construction technology of a kind of steel building on the middle and senior level.
Background technology
At present, most of middle-high buildings are mainly the conventional concrete structure, though concrete structure has the design and the construction experience of comparative maturity, it is bigger to conduct oneself with dignity, and infrastructure investment is than higher, and construction speed is slow, and the cycle is longer.In recent years, advantages such as along with social economy and development of productivity, steel building is few with its floor space, integrated cost is low, speed of application is fast, quality easily guarantees, environmental protection are developed rapidly, are widely used in factory building, the on the middle and senior level or heavy construction.The work progress of existing steel building is: one deck steel column is installed earlier, girder steel is installed again, finish the construction of first floor steel structure frame, carry out the construction of first floor steel floor on this basis, two layers of steel column and girder steel are installed then, finish the construction of carrying out second layer steel floor after the construction of second layer steel structure frame again, so move in circles to top layer, steel floor and steel structure frame are constructed synchronously, be Steel Structure Installation where, where profiled sheet is routed to, like this, must be on the basis of finishing first floor steel structure frame and steel floor, just can carry out the construction of the second layer, can't carry out crossed construction up and down, Shi Gong the scope of operation is few simultaneously, work efficiency is low, causes construction period longer.In addition, the construction steel structure plan that design institute goes out only provides the member specification to arrange, the joint structure block diagram, steel structure member is to carry out blanking processing according to the design drawing size when making, but when installing at the construction field (site), because various tie point kinds are more, annexation is complicated, and various node connecting portions are not marked in detail on the design drawing, so when causing steel structure member to install, dimensional errors is big, assembled on site is not in place, installation accuracy is low, makes the making of steel member can't satisfy the quality specifications requirement of integral installation.
Summary of the invention
The present invention adopts steel floor and the steel structure frame method of construction synchronously when having Construction of Steel Structure now in order to solve, have that the construction operation face is few, work efficiency is low, the cycle is long and the making of steel member can't be satisfied the problem that the quality specifications of integral installation requires, provide a kind of steel building on the middle and senior level reverse construction technology.
The present invention adopts following technical scheme to realize: the reverse construction technology of steel building on the middle and senior level, may further comprise the steps: (1) is carried out refinement to the steel structure frame connected node and is enlarged design of node, specific practice is for carrying out 1: 1 drawing setting-out to steel structure frame connected node structure by flat, upright, section according to design size, then whole steel work is enlarged the detail drawing dimensioning, be depicted as the expansion construction drawing; (2) according to enlarging construction drawing processing assembling steel structure member, when wherein assembling the steel member, the level of steel column is put more energy into and the groove full penetration weld is adopted in the edge of a wing and the web welding of post, and bevel angle is used the gas cutting groove for 30 °～40 °; The H steel column adopts Lincoln weld on 45 ° of ship shape moulding beds; (3) transportation of steel structure member and stacking; (4) installation of steel structure frame: divide section drafting erection drawing by the construction plane form, lifting subregion precedence is: in the horizontal direction, in turn to expansion all around, take symmetry installation, symmetrical fixed form from central authorities simultaneously; In vertical direction, from the bottom to top, layering is installed, and according to the order lifting of secondary beam behind girder steel, the first girder behind the first steel column, finishes the construction of whole steel structure frame simultaneously; (5) installation of steel floor: profiled sheet is ridden on the girder steel by the peg shop, assembling reinforcement net then, fluid concrete again, according to this method each layer steel floor is constructed, sequence of construction is that one deck or which floor steel floor are carried out profiled sheet laying, assembling reinforcement simultaneously, cast compound steel floorslab concrete simultaneously earlier, treat that this layer concrete reaches initial set after, can be to the second layer and other layer steel floor fluid concrete.
Compare with existing technology, the present invention has carried out refinement to the raw steel structural design drawing and has enlarged the node Secondary Design, is depicted as the expansion construction drawing, carries out processing, the blanking of steel component according to this drawing, reaches the quality specifications requirement of structure manufacture and integral installation; Adopt advanced welding procedure, prevented that welding deformation from appearring in member, improve the installation accuracy of steel structure frame; Employing is under the prerequisite that guarantees space frame rigidity, whole steel frame (the posts of elder generation's installation, beam) after the agent structure, carry out the reverse construction method that each layer steel floor is installed again, sequence of construction is that one deck or which floor steel floor are carried out the profiled sheet laying simultaneously, assembling reinforcement, pour into a mould the compound steel floorslab concrete simultaneously earlier, after treating that this layer concrete reaches initial set, can be to the second layer and other layer steel floor fluid concrete, through construction verification repeatedly, the present invention pours into a mould the compound steel floorslab concrete earlier, on this basis, other layer is poured into a mould again, can guarantee the stability of general frame, when reducing pumping of concrete to the influence of general frame.In a word, job practices of the present invention can be constructed at grade, again can interchange operation, be independent of each other, and accelerated speed of application, improved work efficiency.In a word, technology of the present invention is simple, easy construction, economical rationality, safe and reliable, installation accuracy is high, speed of application is fast, this method is particularly useful for all kinds of multilayers, nine layers of following high-rise steel structure building.
Description of drawings
Fig. 1 is a steel structure member manufacture craft flow chart of the present invention
The specific embodiment
The reverse construction technology of steel construction on the middle and senior level may further comprise the steps:
One, the steel structure frame connected node is carried out refinement and enlarge design of node
1, uses the AUTOCAD2004 mapping software, the steel structure frame node structure is carried out drawing setting-out in 1: 1 by flat, upright, section, various node connecting portion nodes are studied in great detail according to design size.To former design plane, facade is that the unit has carried out enlarging design with the axis, and member is numbered;
2, utilizing the connection joints of steel structure software for calculation to carry out the connection Force Calculation of each class A of geometric unitA, is the graphic designs platform with the CAD mapping software, and complicated connected node and complex component are amplified sample, sets up the steel structure node picture library, realizes the graphical information microcomputerization;
3, various connected node kinds are more, and annexation is complicated, and common the solution linked up by proposition design scheme and designing institute, and the detail drawing of each member is selected and edit out, beam, post are connected carried out refinement expansion node Secondary Design;
4, whole steel work is enlarged the detail drawing dimensioning, be depicted as the expansion construction drawing, reach the quality specifications of structure manufacture and integral installation.
Two, according to enlarging construction drawing processing assembling steel structure member
1, steel structure manufacture method, as shown in Figure 1,
(1) feed intake: after finishing the shop detail drawing design work, the loss that calculates various materials, specification, the clean consumption of material according to the drawing material list proposes the material budget plan, and budget program can increase by 10% again by the required numerical value of actual amount and get the raw materials ready.
(2) raw material are corrected
1. surface quality of steel does not satisfy quality requirement, should correct.The rectification of steel and part should adopt purl machine or section-straightening machine to carry out, and carries out than steel plate also available pressure machine or flame heat.Structural carbon steel is lower than-16 ℃ in environment temperature, when low-alloy structural steel is being lower than-12 ℃, should not carry out gagging and cold bend(ing).
2. the steel surface after correcting, do not have tangible concave surface and damage, the surface scratch degree of depth must not be greater than 0.5mm, and should be greater than 1/2 of the negative allowable variation of this thickness of steel product.
(3) number material
1. check steel specification, material, lot number, and should remove surface of steel plate greasy dirt, earth and booty.
2. number welding allowance for shrinkage and the cutting of reserving during material, surpluses such as edge processing should meet allowable variation, and sheet material number material should number go out reference inspection line and rule hole line.Should indicate Part No., quantity, processing method etc. behind number material on part, and the material different according to part adopts different colours to mark.
(4) line
Utilize processing and fabricating figure, sample bar, model and invar tape to rule.Model can adopt the iron sheet of thickness 0.50～0.75mm or plastic plate to make, and the sample bar is generally made of iron sheet or band iron, when the more available wooden rule bar of length.Sample bar, model should indicate job number, figure number, Part No., quantity and processing limit, groove position, folding line and overbending direction, aperture and rolling circle radius etc.The model of making, screed bar should be confirmed each allowable variation+0.0mm of of model ,-0.5mm through checking.
(5) cutting stock
The cutting of steel comprises the method in elevated temperature heat sources such as gas cutting, plasma panel cutting, the method for mechanical forces such as the employing shearing that also has, cutting, frictional heat.Consider that the quality and the economy of cutting power, cutting accuracy, sectility face determine.It is accurate, straight that the cutting stock size must guarantee.
(6) edge, end processing and drilling
Edge processing and end method for processing mainly contain: shovel the limit, dig the limit, mill limit, carbon arc air gouging, gas cutting and beveling machine processing etc.Common method for drilling is as follows: mechanical punching; The gas perforate; The nestable brill drilling of drill jig and plate; Digital control hole drilling.Use sanding machine cleaning hole burr after the drilling, and must not damage mother metal.
2, steel member assembling
When 1. assembling the steel member, each parts should be qualified on inspection, joint face and should remove totally along the iron rust in the weld edge 50mm scope, burr, dirt.
2. reply parts material is corrected before the member assembling.
3. the level of post is put more energy into and the groove full penetration weld is adopted in the edge of a wing of post and web welding.In the 500mm scope, post frange plate and web attachment weld adopt the groove full penetration weld about flange of beam.Bevel angle is used the gas cutting groove for 30 °～40 °, regulates the built-up welding number of plies and weldering speed according to actual conditions.
4. assembling can be adopted tire anchor clamps method, and when assembling on platform, the plane difference of height of platform must not surpass 4mm.
5. the assembling of member should be according to form of structure, and factors such as welding method and welding sequence are determined rational assembling sequence.
6. the gap of part assembling must not should have the area more than 75% to be close to holding out against contact surface greater than 1.0mm except that technological requirement, checks that with the 0.3mm clearance gauge it fills in area must not be greater than 25%, and the maximal clearance, edge must not be greater than 0.8mm.Interface misalignment ± 5.0mm.
7. H shaped steel adopts Lincoln weld on 45 ° of ship shape moulding beds, welding wire H08A, and solder flux 431, E43XX type welding rod is adopted in manual welding.
8. after the welding of H shaped steel,, use the flame straightening gradient with the distortion of edge of a wing arbor press RA.
9. H shaped steel finished product crop, milling machine tack.
10. H shaped steel, gusset plate drilling.
3, welding
1. check element size according to drawing, determine errorless after, assemble again.
2. in the line of the node place of beam, post, with the gusset plate location, check verticality with angle square again, check spacing dimension with invar tape, carry out spot welding, both sides are to spot welding, and every spot welding place is greater than 10mm.
3. after the single products assembling finishes, check each size, weld then.During welding, rule of thumb determine welding sequence, to reduce distortion.
4, steel member rectification, reconditioning
1. member welding back is with adding heat straightening amount of deflection, lateral bending and end plate warpage, and when adopting the distortion of flame straightening postwelding, the heating of same position should not surpass twice, and heating-up temperature must not surpass 900 ℃, should slowly cool off naturally after adding heat straightening.
2. repair weld defect, local solder joint, burr is polished.
3. the processing of rubbing surface
Anti-slip coefficient value after the high-strength bolt rubbing surface is handled should meet designing requirement (being generally 0.45～0.55).The processing of rubbing surface can be adopted methods such as sandblast, shot-peening, pickling, grinder buffing, generally should be undertaken by designing requirement, and unit in charge of construction can adopt suitable method to construct during the design no requirement (NR).When adopting grinder buffing to handle rubbing surface, the polishing scope should be less than 4 times of bolt aperture, and the polishing direction should be vertical with the member stress direction.The friction joint face of high-strength bolt must not application, after high-strength bolt installs, junction plate periphery seal should be carried out application again.
5, suspension column is made assembly unit and bolt weldering
According to the boring of ruling of junction plate relevant position, reconditioning burr then, spot welding is carried out in the position of accurately marking H shaped steel again, measures the verticality of all directions with angle square, the spot welding ribbed panel, again with steel ruler, angle square, check each size and weld after errorless.After treating that peg enters the scene, carry out the bolt weldering before the lifting on request.
6, rust cleaning, application, label.
Three, the transportation of steel structure member and stacking
(1) transportation of member
1. the member of shipping, single-piece surpass 3t's, should see that easily the position paints the sign of putting on weight and position of centre of gravity, so as not in loading, unloading car and lifting process damaged member; Piths such as gusset plate, high-strength bolt joint face will have suitable safeguard measure, and fragmentary parts etc. all will be used bolt and the fastening bunchy of iron wire or pack shipping by same classification.
Transportation 2. large-scale or heavy component should be worked out traffic program according to the performance of traffic route, haulage vehicle.In traffic program, to consider the stacking condition of hoisting engineering, the transportation order that construction period is worked out member emphatically.
3. during transport member, should select vehicle for use according to length, the weight section configuration of member; The length and the binding method of the fulcrum of member on haulage vehicle, two ends elongation all should guarantee that member does not produce permanent deformation, do not damage coating.The member lifting must be lifted by crane by the design suspension centre, must not be random.
4. the limit height 4.5m of highway transportation shipment, as need during by the tunnel, limit height 4m then, member grows vehicle body must not surpass 2m.
(2) stacking of member
1. member generally will be deposited in the stacking field and the on-the-spot stacking field of factory.Member is stacked should be smooth solid with raising, no puddle, ice sheet, and the smooth drying in ground, and answer draining unobstructed, and drainage is preferably arranged, the loop of vehicle turnover is arranged simultaneously.
2. member should be inserted perpendicular sign board by kind, model, erection sequence zoning.Member bottom cushion block will have enough bearing surfaces, does not allow cushion block that big settling amount is arranged, and the height of stacking should have basis, does not produce permanent deformation with nethermost member and is as the criterion, and must not arbitrarily pile height.The steel work product must not directly place on the ground, bed hedgehopping 200mm.When the member of same model stacked, the fulcrum of every layer of member will be on same vertical line.
3. in stacking, find to have the underproof member of distortion, then close inspection is corrected, and then stacks.Must not be deposited in underproof deformation element in the qualified member, otherwise can influence installation progress widely.
4. for stacking good member, send special messenger's summarized materials, set up the dynamic management of perfect entry and exit factory, forbid disorderly to turn over, disorderly move.Carry out due care to stacking good member simultaneously, avoid exposing to wind and rain, weather exposure.
5. dissimilar steel members generally are not deposited in together, and the steel member of same engineering answers classify and pile up at areal, is convenient to the entrucking shipping.
Four, the installation of steel structure frame
(1) member is checked and accepted, is corrected
Steel construction piece carries out detailed inspection by the professional quality testing staff to verticality, planeness, lateral bending degree, weld size, welding quality, physical dimension, high-strength bolt coupling and connecting hole diameter, position, the member numbering of member one by one after entering the erecting bed.Eject the installation axis (center line) of steel column, deform after the defective, correct and handle, handle and to install after qualified at once if find in transportation the steel member.
(2) stone bolt mounting process
For accurately placement and fixedly pre-embedded bolt, adopt the secondary casting method, use steel model method foot bolt regularly.
1. make two steel models identical earlier with the bottom plate of steel column foot specification, and mark cross axis (so that axis centering), with stone bolt all with upper and lower fixed by nut (temporary fixed to guarantee verticality) on the steel model, and check its verticality, put it into then on the axial location of mensuration, and adjust its scale error and absolute altitude according to orientation axis, treat that each spot size is qualified after, with the reinforcing bar of Φ 8 stone bolt is weldingly fixed on the basic main muscle.The bottom surface absolute altitude of steel model should be reserved and regulate the space than the low 50mm of actual steel column base plate absolute altitude, treat that the adjustment of steel column pin fixedly finishes after, again the space is tamped.
2. in order to guarantee the accuracy of pre-embedded anchoring bolts, prevent owing to placing of concrete causes change in location, also need before concrete initial set, earlier the steel model is carried out the levelness test, the model that does not meet levelness and axis tolerance is individually carried out the part adjust, and the controlling level error, axis based error must not be greater than 1mm.After treating concrete initial set, just unclamp the nut on the model, the steel model is taken out, the bolt part is protected.
3. after treating that all steel columns of the first floor, girder steel, inferior girder steel all install, overall dimensions is carried out complete detection and correction, and carry out secondary pouring with high strength microdilatancy pea gravel concreten interspacing in advance under the base plate of all steel columns.
(3) install and proofread and correct
1. erection sequence: divide section to draw erection drawing by the construction plane form, lifting subregion precedence is: in the horizontal direction, from central authorities in turn to around expansion, take simultaneously that symmetry is installed, symmetrical fixed form; In vertical direction, from the bottom to top, layering is installed, simultaneously according to girder steel behind the first steel column, the order lifting of secondary beam behind elder generation's girder, the workload that every workday is finished all can form a unit, constitute space frame,, improve wind resisting stability and safety to guarantee its rigidity, help lifting the control of precision, reduce accumulated error, finish the construction of whole steel structure frame, one deck steel column promptly is installed earlier, girder steel is installed on this basis, two layers various steel members are installed, and erection sequence is treated all girders of the second layer with first floor erection sequence, secondary beam, after installation and measurings such as stair are qualified, high-strength bolt is carried out end twists, girder to the first floor welds, and carries out the moment of torsion inspection within the 24h after high-strength bolt is twisted 1h eventually, and does detail record.By that analogy up to all installing.
2. the installation of steel column
The segmentation of A steel column is stacked situations such as place according to performance, tower crane to distance, road and the construction of each steel column of structural system, structural plan shape, tower crane, adopts the principle that adds long column as far as possible.Every joint steel column overwhelming majority all is equivalent to the height of two floors, between 7.2～7.6m, reduces on-the-spot number of connection and welding capacity usually, thereby improves installation rate and precision, reduces engineering cost, improves security reliability.
B is for the ease of adjusting the verticality of post, and several nuts (at least four) of screwing on earlier on pre-embedded bolt all are screwed to the contact base surface, and with after the level gauge levelling, begins to lift steel column (adopting automobile crane or pillar crane).
During C lifting steel column, (as thundery sky gas, must stop work) occurring in order to prevent contingency, is four cable ropes in the work of the upper end of post, can four direction temporary fixed, also can be used to adjust verticality.
The D measurement update
Behind the steel column hoisted in position, with nut that it is tentatively fixing, with plumb bob, steel ruler it is carried out initial adjustment then, make the center line and the axis based error of post meet design and code requirement, with two transits and level gauge steel column is carried out observing and controlling again, fine setting realizes (cable rope can suitably cooperate) by the nut of adjusting under the post footing piece.
Unclamp rope and again it is tested, after the correction, final grouting (fixedly cable rope) is carried out at position, base plate gap.
E steel column lengthening connects
Steel column is that segmentation is formed by connecting, and method of attachment is with high-strength bolt that web both sides clamping plate are fastening.When connecting, for avoiding causing the accumulated error of axis, must be noted that then the orientation axis of every segmented column all should directly be drawn from the Ground Control axis, to guarantee that whole post is in the allowable variation scope.And its axis and verticality are detected with two transits.After adjusting, connect and to carry out high-strength bolt and just twist, treat first space structures stress unit of this layer install and detect qualified after, it is stubborn that the steel column connecting bolt is carried out end, by that analogy up to all installing.
3. the installation of girder steel (primary and secondary crossbeam)
After four steel columns of first space-load unit install, but just main beam between the erection column and time crossbeam.
Being connected of A steel column and crossbeam is to belong to add the weld seam connection again after high-strength bolt connects, and before connection, must handle the attrition surface of junction.Attrition surface requires to reach smooth, dry, and must not there be iron scale, burr, crator, paint and greasy dirt in the surface.
B requires in hoisting process, and girder steel keeps level as far as possible, and suspension centre is calculated and tests.
C uses special-purpose pyramid type crowbar and interim bolt (standby) in installation process, insert in the screw at girder steel two ends with crowbar earlier, again interim bolt is screwed into, after treating that the adjustment of structure installation accuracy reaches standard code, again high-strength bolt is freely penetrated in the keyhole, do not allow to beat by force.If there are indivedual bolts freely not penetrate, then adopt reamer or file slightly to repair, the aperture after the finishing can not surpass 1.2 times of diameters of bolt, forbids to adopt flame cutting reaming.The direction that penetrates of high-strength bolt must be consistent, so that operation.
The erection sequence of D high-strength bolt is to carry out to the less direction of constraint with the bigger position of joint rigidity in principle, and it is to carrying out in proper order all around by bolt group center that high-strength bolt is tightened order; In order to guarantee that the high-strength bolt screw thread contacts with the screw thread of nut, the bolt screw thread should guarantee to expose nut and 2～3 buckle in addition; Stressed evenly for each high-strength bolt that makes the joint, fasteningly carry out at least at twice.Promptly be divided into and just twist and twist eventually, first screwing torque generally is controlled at about 50% of whole screwing torque.
4. welding
A beam, post are installed the construction of adopting manual electric arc welding, guarantee the Steel Structure Installation quality.Adopt during welding to be symmetrically welded and to increase reversible deformation and reserve distortion, reduce distortion and welding residual stress as far as possible, principle is to adopt symmetrical configuration, node symmetry, comprehensive being symmetrically welded.
B is in order to prevent the generation in crack, takes to weld measures such as interlayer temperature in preheating, after heat and the maintenance welding at different situations such as steel plate thickness, weather, wind-force.
The suitable continuous sequence of C multilayer welding, timely dress watch after each layer welding bead weld welds after the removal of defects again.Welding point requires the butt joint and the corner connection weld seam of penetration weld,
During the welding of D multilayer beam column, should weld top layer post and girder connection earlier according to installation situation, weld bottom post and girder connection again, the post and the girder connection of back weldering mid portion, when welding top layer post and girder connection, should the bigger position of the straight deviation of first welding column roof pendant, reduce the capital vertical missing to utilize welding after-contraction distortional stress to reach.Welding sequence should be from the jackshaft terminal to diffusion welding all around.
The E welding finishes, and the welder answers the slag on trimming surface and the splash of both sides, checks presentation quality, prints in weld seam position mark note after the passed examination, and performs the written information record, and the on-the-spot instrument of cleaning welding, article etc. shift next pad.
Five, the installation of steel floor
Basal plane adopts profiled sheet, specification is YX-76-344-688, thickness is 1mm, with special equipment (bolt welding machine) welding (penetrating weldering), the peg specification is Φ 16 * 110mm, spacing 400mm between profiled sheet and the girder steel, the indented bars of colligation Φ 14 in the profiled sheet groove, behind the two-layer 16 * 4mm cold-rolled torsion steel bar of surface layer colligation, between beam with the lumps of wood (150 * 60mm) and the bowl fastening type scaffold of 1.2m spacing completely support, completely pour into a mould the C30 concrete.According to this method each layer steel floor is constructed, sequence of construction is that one deck or which floor steel floor are carried out profiled sheet laying, assembling reinforcement simultaneously, pour into a mould the compound steel floorslab concrete simultaneously earlier, after treating that this layer concrete reaches initial set, can be to the second layer and other layer steel floor fluid concrete.Through practical proof, construction technology of the present invention has been successfully applied to Science ﹠ Technology Center building, Yuci City longitude and latitude manufacturing process base, Shanxi Province and new product test room engineering steel framed structure.
Claims (1)
1. reverse construction technology of steel building on the middle and senior level, may further comprise the steps: (1) is carried out refinement to the steel structure frame connected node and is enlarged design of node, specific practice is for carrying out 1: 1 drawing setting-out to steel structure frame connected node structure by flat, upright, section according to design size, then whole steel work is enlarged the detail drawing dimensioning, be depicted as the expansion construction drawing; (2) according to enlarging construction drawing processing assembling steel structure member; (3) transportation of steel structure member and stacking; (4) installation of steel structure frame: divide section drafting erection drawing by the construction plane form, lifting subregion precedence is: in the horizontal direction, in turn to expansion all around, take symmetry installation, symmetrical fixed form from central authorities simultaneously; In vertical direction, from the bottom to top, layering is installed, and according to the order lifting of secondary beam behind girder steel, the first girder behind the first steel column, finishes the construction of whole steel structure frame simultaneously; (5) installation of steel floor: profiled sheet is ridden on the girder steel by peg shop, assembling reinforcement net then, fluid concrete is constructed to each layer steel floor according to this method again;
It is characterized in that: in the step (2), during assembling steel member, the level of steel column is put more energy into and the groove full penetration weld is adopted in the edge of a wing and the web welding of post, and bevel angle is used the gas cutting groove for 30 °～40 °; The H steel column adopts Lincoln weld on 45 ° of ship shape moulding beds; In the step (5), the sequence of construction of steel floor is that one deck or which floor steel floor are carried out profiled sheet laying, assembling reinforcement simultaneously, cast compound steel floorslab concrete simultaneously earlier, treat that this layer concrete reaches initial set after, can be to the second layer and other layer steel floor fluid concrete.
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