Quality and safety of steel structure workshop installation

Steel structure workshop installation links more, the following focus on its steel column installation, steel beam installation, support installation, roof installation technical points are analyzed.

Draw the cross center line of the steel column base plate, and at the same time draw a 1m elevation line as a control line for center and elevation adjustment. Take the previously designed and processed retractable spindles, and connect the bolt holes of the column joint flange plate well, as the lifting point. In the process of lifting, the sleepers should be well padded based on the position of the root of the column to avoid contact between the bottom of the column and the ground, or to induce dragging. After the steel column is ready to be in place, the foundation bolts should be adjusted and tightened. During the installation of a single column, if no other member is attached, it is necessary to pull the cable and wind rope. In the process of hoisting one section in front of multiple columns, ensure that the next section is ready to be in place, adjusted and fastened properly. In addition, the contact surface between the multi-section column and the top tight surface should be controlled within the range of ≥70%, and the maximum clearance at the edge should be controlled within the range of ≤0.8mm.

For steel beams, the form of two-point binding and lifting is selected. If the space is limited, the method of combined lifting of primary and secondary beams can be implemented. In the connection process of beam to column and beam to beam, 30% ordinary bolts should be used for temporary connection. If a bolt is used on the left and right sides of the main beam, after the installation of one side of the secondary beam is complete, the installation of the other side of the secondary beam needs to be carried out, and ensure that the temporary installation bolt back to maintain parallel with the web of the main beam, so that the installation operation is more convenient to complete.

For steel structure installation process support installation, there are usually two types: one is vertical support, the other is horizontal support; Both supports stabilize the overall structure. Therefore, each layer of support should be installed before the installation of the column and beam of the previous layer to avoid missing installation. At the same time, the support should be installed on the ground after the completion of assembly, before the lifting operation, the installation direction of the support should be well controlled before lifting. In addition, after adjusting the beams, columns and supports, the high-strength bolts are further screwed.

Roof frame, the use of crawler crane (150T) into the installation, before the installation of the roof frame, it is necessary to pull the horizontal safety rope based on the upper and lower string position of the roof frame, so as to make the safety of the roof installation operation. In the process of roof truss lifting, a good quality hemp rope is tied based on the end to provide convenience for accurate placement. Because the roof span is large, taking into account the occurrence of lifting deformation to be effectively prevented and controlled, it is necessary to use 4 lifting points, lashing processing on the roof. In addition, due to the poor stability of the roof truss in the horizontal direction, before decoupling, it is necessary to take the wire rope to properly tighten the horizontal direction, so as to improve the stability of the roof truss in the horizontal direction.

Above all, realize that the steel structure installation construction needs to consider more factors, in the process of actual installation work, it is necessary to combine the actual situation of the project, the principle of adhering to the "specific circumstances, specific analysis", earnestly implement the installed steel column, steel beam, installation and technical key points, the installation of roof to ensure that the overall installation construction quality and safety of ascension, Further lay a solid foundation for the promotion of comprehensive benefit of steel structure installation and construction.