DOI: 10.11799/ce202502006
Rectification technology for quality defects in the construction of large-span,heavily loaded steel trusses
ZHANG Wei
WANG Ming
ZHANG Huaquan
Abstract：The large-span steel truss of Dongzhouyao Coal Mine clean energy transformation project has serious quality defects such as vertical deformation and displacement of large-span steel truss and horizontal deformation and displacement of steel frame support columns,due to the construction process and construction management errors,which directly affects the equipment installation and safe use.Aiming at the problem,we introduced the reverse loading of large-span steel trusses by post-tensioning folded prestressing high-strength steel cables with the symmetrical setting of steel wire cables on both sides,and at the same time,assisting a large crane to apply vertical upward tension in the middle of large-span steel trusses so that the vertical deformation of the trusses and horizontal deformation of the support columns can be returned to the deviation correction technology.This rectification technology not only eliminated the structural quality defects,but also showed high efficiency,low cost,without influencing the overall safety of the original design of the joist and the supporting frame columns,which is of high value of application and popularization.
Keywords：steel trussessteel frame structural support columnsquality defectsrectification technology
Publication Date：2025-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 38-43 )