Steel structure construction has rate the characteristic with fast, cycle weak point, high intensity, but because,also be such characteristic, its construction process often easy oversight the quality problem of a few keys, bury next safe hidden trouble. Small today make up laid the manager worker worker with very rich experience of a work designedly, recorded him to give small compile point of saying a few control.
1. buries bolt beforehand
(1) in installation the waist before burying bolt beforehand has been familiar with blueprint first, make clear the design intent in the graph, should make installation pattern plate.
(2) will bury bolt to use installation pattern plate and fixed position of reinforcing steel bar to be in beforehand column advocate on muscle and pattern plate, assure to bury bolt not to suffer concrete to irrigate beforehand build an influence to produce displacement.
(3) must be control of the span between bolt, discretion inside permission error range; Make sure bolt silk is buckled irrigate in concrete when building, be not damaged.
(4) after the earth that finish builds construction, need to use altazimuth and sruveyor's level to undertake checking to the elevation of foundation bolt, axes, make good record, hand in below one working procedure to check and accept.
2. component is made
(5) the flow of the craft that make is commonly: Group of → of cut of → of makeup of → of the makings below lofting → establishs → to bury arc to solder → bore → assembles → correctional shape → of the makings below → riveting spare parts is made assemble → solders and solder examine component of → of outfit of → antirust processing, besmear, number is checked and accept leave factory. Want to capture crucial working procedure to undertake quality is controlled, the treatment device that if control the craft of crucial part, main component part, place,uses.
3. solders construction
(6) before applying solder, the attention should check the certificate of approval of welding rod, press the requirement of the manual to operate, the solderer must hold card mount guard.
(7) welding line surface does not have crackle or solder tumor absolutely, one, 2 class welding line must not have flaw of hole of stomatic, slag inclusion, arc; One class welding line does not bite the blemish such as not edge, full solder so that have; One, beard of 2 class welding line undertakes by the requirement nondestructive detects, want to check steel seal in formulary welding line and place.
(8) unqualified welding line does not get processing of do sth without authorization, according to after real problem revises craft, undertaking handling again, the time of welding line repair of same position shoulds not be more than 2 times.
4. component is installed
(9) the microscope before answering to be installed in component part its quality, when component part is out of shape and blemish exceeds limit, must not use before processing.
(10) whether does the mat iron that column motherboard should check to fall when installing steel column fill up solid, level up, prevent the foundation bolt below column motherboard to break firm.
(11) column of beard examination control is perpendicular, have without displacement, if this one problem discovers in installing a process, before the structure has not form stable system, should adopt temporarily timbering measure.
(12) when steel structure installation arrives between form voidance fixed unit, after checking and accept qualification, want to mix column motherboard in time the space of fundamental end face is used expand concrete is irrigated 2 times build close-grained.
(13) after full installation is finished, the verticality that should examine structure of steel structure main body and integral plane bend.
5. fastener joins
(14) the before machining quality and installation protection that notices face of attrition of excel in bolt, prevent pollution, rustily. Should undertake its undertake the face fights slippage coefficient to experiment chafing answering before installation, leave factory proof and lot number examination, the excel in bolt of fixed and draw-out different lot number does axial force test.
(15) freedom of requirement of excel in bolt wears installation, must not be beaten or reaming. Accordingly, definite moulding bed pattern should prepare to be out of shape in order to control its when the component that make, adopt practical fixed step not to produce dimension deformation in order to assure its when carry.
(16) board folded interface must is more than 75% , interface should level off, brim aperture must not be more than 0.8mm. Bolt of strict control excel in installs technology, include order of method, close to handling order, installation solid, Chu Ning, twist eventually undertake checking, wait to twisting the torsional spanner of bolt to should undertake demarcate. Twist eventually end should examination of one by one, pigheaded to owing, super- answer pigheadedly to undertake filling twisting or change.
6. divides rust, spray
(17) should ask to reach the different grade that divide rust to use the different method that divide rust according to blueprint (the steel structure that before specific means can be examined, releases is antirust article) .
(18) before besmear brushs fire prevention or antirust paint, besmear brushed component part face must not have the foreign body such as solder broken bits, smeary, water and burr, besmear brushs number and ply to should accord with design requirement.
(19) besmear outfit material must have certificate of approval, besmear the construction unit that brushs fire retardant coating should pass approval of fire control department.
7. is other the problem that requires an attention
(20) if have gutter, department staff cannot design the place of clingy capital, can put in the likelihood that cannot install rainspout otherwise. The position that supports between staff of gutter rainspout, department and column additionally must reasonable design, come up against department staff easily otherwise or prop up between column.
(21) of position of bolt of a basket of flowers on gripper decorate should reasonable, do not want deviate girder, go to the lavatory as far as possible worker installation, go against safety otherwise. Also should consider the cloth set place that border opens additionally, when avoiding to decorating gripper, maintain with border fight.
(22) do not consider one-sidedly on the brace aperture of purlin " suffer play edge, press press side " wait an element a moment, hit fluctuation limit to be apart from the eyelet that differ to be installed very easily when installation instead.
(23) door window packet of horn board that wait cannot treat as the same, because panel cannot assure in construction,be located in the wave crest that presses template or trough.
(24) in project of large steel structure, deepen graph number to must consider production, deliver goods, of installation convenient.
(25) must understand Party A adequately to offer " the data such as load " each collaboration just wants to each doing his own job, do the work advanced side as far as possible, be succeeding activity begin ready-made.
(26) the position of bolt of reasonable arrangement excel in, should consider twist off implement the construction space that reachs torque spanner, because the space is too little,not be in when installation, bring about twist off implement reach torque spanner cannot perch, cause wintersweet head cannot to twist off or cannot screw bolt.
(27) excel in bolt joins board the bolt that should use fluctuation semmetry as far as possible according to actual condition decorates a method.
(28) if light steel structure has palisade brick wall, just must reach construction to just be communicated with construction ahead of schedule, had had sex.
(29) foundation bolt is commonly build unit construction installation by earth, steel structure manufacturer gives a picture, because this is before construction,had better have the technical put all one's card on the table of literal form.
(30) because after the intermediate Liang An that cross is installed, the join of the column that defy wind and girder falls flinch bigger, answer to use bedspring board as far as possible, if the bridge of frontispiece uses bolt and connection of the column that defy wind, can cause roofing rough.
(31) the detail drawing that the attention checks roofing purlin decorates graph and girder carefully, the circumstance with the purlin abhorrent amount that often the ability when undertaking checking construction discovers roofing purlin arranges graph and girder detail.
(32) the plan that some design units make is medium node board does not have costal region of put more energy into, bring about node board easily to be out of shape when follow-up solder.
(33) Liang Zhu becomes department rod when join board, outside becoming Kong Kuo, extend, because some places fasten the join on lever board too long, bring about a space too small, department staff is too senior put do not go in. Some bridge construction often is put in such problem.
(34) when making a form window, direction of window of front of costal region of purlin splint put more energy into, so when form window walks along this costal region board, do not go by. Use heavy head bolt as far as possible when the purlin that has a form window is installed additionally.
(35) doorway superstratum form window and go up casing distance is too close, did not consider the position of awning.
(36) it is good that Xiang Linlin falls to be apart from the brace between to was not decorated on window frame, brace termination and window frame conflict.
(37) the sort of armor plate and high strenth bolt as far as possible little, want to consider material experiment charge.
(38) purlin joins board do not design a square as far as possible, the workshop is assembled easily topsy-turvy.
(39) inside gutter does not do heat-insulation layer, indoor meeting forms a " Leng Qiao " , produce the phenomenon such as a water and knot dew. Answer to brush paint of the dew that prevent a knot in the besmear below gutter, or spray polyurethane heat-insulation layer, also can do processing of other heat preservation.
(40) roof boarding uses the flat that place core, if span is largish often meet inside half an year slack. Roof boarding is outer board have mark, the heat that because without the consideration its endure sun insolate,often relapses bilges cold shrink action.
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