Research on Construction Technology of GRC & GRG Composite Curtain Wall on Over-high Hyperboloid Steel Structure

In order to solve the problem that the installation of hyperboloid composite curtain wall system components is restricted by the site and cannot be lifted by heavy lifting equipment, a construction technology of hyperboloid steel structure exterior large GRC and GRG for composite curtain wall is carried out. The research objects GRC and GRG wall modeling are complete spatial curves, each plate exhibits a different curvature, by using BIM modeling and model data processing methods, the entire GRC, GRG board is reasonably cut, lofted, and overmolded. the embedding and welding of the steel plate keel of each unit group are precise calculated and positioned. Further by the using of the existing steel structure frame to set up as the hoisting frame and lifting hoist, the cut plate is hoisted in sections. The whole project construction process are involved with BIM modeling and strictly control on-site positioning and installation accuracy. The results show that the use of BIM modeling technology to assist on-site construction can ensure the accuracy of aluminum veneer installation, form a smooth spatial surface assembly effect, reduce the safety risk of the construction process of large GRC outer walls and GRG inner walls, optimize the construction process, and ensure the project quality, the economic and technical effects are remarkable.