In the construction of steel structure project, problems and solutions are met. 1. The production and production of components. The plates used for portal steel frame are very thin, the thinnest can be used as 4mm.Cutting mode should be the first choice for cutting multi sheet metal, and flame cutting should be avoided.Because cutting with flame will cause great wave deformation on the edge of the plate.At present, most manufacturers of H-beam welding adopt automatic submerged arc welding or semi-automatic welding.If the control is not good, welding deformation should occur to make the component bend or twist.

    2Column base installation problem (1) embedded parts (anchor bolt) phenomenon: overall or layout deviation; elevation error; screw thread not taken protection measures.The bolt holes of the steel column base plate are not aligned directly, resulting in insufficient screw thread length.Measures: the steel structure construction unit shall cooperate with the civil construction unit to complete the work of embedded parts before concrete pouring and tamping.The relevant dimensions must be checked and fixed firmly.(2) The phenomenon that anchor bolt is not vertical: the levelness of frame column base plate is poor, the anchor bolt is not vertical, and the horizontal error of embedded anchor bolt after foundation construction is large.The columns are not in a straight line after installation, which makes the appearance of the house very ugly, brings errors to the steel column installation, affects the structural stress, and does not meet the requirements of construction acceptance specifications.Measures: for the installation of anchor bolt, the bottom plate shall be leveled with the lower adjusting bolt first, and then filled with non shrinkage mortar by secondary grouting. This method is used abroad.Therefore, during the construction of anchor bolt, reinforcement or angle steel can be used to fix the anchor bolt.The anchor bolt should be welded into a cage, the support should be improved, or some other effective measures should be taken to avoid the anchor bolt moving one position when pouring the foundation concrete.(3) The phenomenon of anchor bolt connection: the anchor bolt of column base is not tightened, the base plate is not welded with the bottom plate; some anchor bolts with 2-3 threads are not exposed.Measures: bolts and nuts shall be welded; outside chemical bolts, fireproof coating and heat insulation shall be thickened to prevent the anchoring performance from being affected in case of fire; foundation settlement observation data shall be supplemented.