Quality control in the installation process of steel structure workshop

Before the installation of the steel structure workshop, it is necessary to do a good job in the preliminary work. For example, before hoisting, the installer should retest the components, and the hoisting can only be carried out on the premise that the components are not deformed and the installation dimensions are correct. In addition, on the premise of confirming that the strength of the foundation concrete meets the specification requirements, the installer should also inspect the embedded bolts or cup openings of the steel column foundation. If deviations are found in the position and elevation of the foundation, the position must be recorded. In order to adjust the position of the steel column.

In order to improve the installation accuracy of the overall steel structure workshop, select the part of the factory building that has inter-column supports, tie rods and roof supports to be installed first. After the hoisting of this part of the steel column, the axis and elevation of the steel column must be re-measured first. After the deviation is corrected, the steel column is temporarily stabilized with the cable wind rope, and then the inter-column support, roof beam and inter-beam tie rod are installed. This is the so-called Rough installation.

Roof beams should be assembled on the ground before installation, and then hoisted after passing the measurement. After the beam is in place, it is connected with high-strength bolts, and other parts are fixed with corresponding bolts, but all kinds of bolts should not be locked. After each component is fixed, the axis and elevation of the steel column are retested and corrected again, that is, fine-tuned. The axis of the steel column should be retested from two directions. After the retest is qualified, the bolts of each part should be tightened in turn.

For high-strength bolts, the initial tightening should be carried out first, and the axis of the steel column should be dynamically tracked during the tightening process. If the axis changes beyond the allowable value, it should be adjusted immediately. The entire tightening process should be carried out simultaneously from the joints of beams and columns to the joints of supports and tie rods, using a symmetrical method for both ends of the same component, so as to reduce the cumulative error on one side. This ensures that the steel columns are installed correctly. If during this process, it is found that the installation part and the installed part do not match, the installed part cannot be adjusted, but the installation part should be adjusted or other remedial measures should be taken.

For example, if the steel beam and the steel column do not match, the steel column cannot be adjusted, only the steel beam can be adjusted. During the entire bent installation process, the correct installation of the steel column is a necessary condition for the correct installation of everything else.

During the installation process of the steel structure workshop, each independent bent part should form a stable structure as soon as possible. Through the above method, several other parts can be installed in turn, so that the whole factory building has a stable bent frame structure at intervals. In this way, the cumulative error generated during the installation of the whole factory building can be dispersed to each part, and the influence of natural conditions can also be avoided. Deform or fall off or even overturn the installed steel components.