The welding deformation during the welding process of spherical cap structure is a very important guideline on the structural safety. 球冠结构在焊接过程中产生的焊接变形是关系到结构安全性能的重要指标。
The prestressing duct vacuum grouting workmanship is an effective measure for improving the safety and durability of the post-tensioning concrete structures. 预应力管道真空辅助压浆工艺是提高后张预应力混凝土结构安全度和耐久性的有效措施。