Digital Technology Enables Precise Alignment of Double-Curved GRC Panels

Digital technology is the core means of solving the challenge of precisely aligning double-curved GRC panels. Through three major technology systems—3D scanning, BIM technology, and digital twin—Qinglong Group controls the installation accuracy of double-curved panels within ±2mm, achieving "millimeter-level" precise alignment.

3D scanning captures actual data. Laser scanners are used to obtain point cloud data of the base structure with an accuracy of ±1mm. In the hotel project in Algeria, Qinglong Group scanned the surface of the concrete structure to generate a high-precision 3D model; comparison with the design model revealed a maximum deviation of 35mm, enabling timely adjustment of panel dimensions to avoid on-site cutting. The scan data directly drives CNC machining centers to fabricate the panels, ensuring a perfect fit with the base structure.

BIM technology optimizes the alignment plan. Clash detection identifies design conflicts in advance, while virtual pre-assembly optimizes panel joint design. In the Shenzhen Yirui Biotechnology Building project, Qinglong Group digitally pre-assembled more than 2,000 double-curved panels using BIM models, identifying and resolving 136 alignment issues and avoiding on-site rework. Panel joint widths are precisely determined through thermal deformation calculations, ensuring both sealing effectiveness and the necessary deformation space.

Digital twin guides on-site installation. A unique QR code is generated for each panel; scanning it provides the installation position, angle, and connection method. Installers view the virtual model through AR devices to correct installation positions in real time. In key projects, Qinglong Group employs total station automatic tracking technology, achieving installation accuracy of ±1.5mm. This digital installation system has tripled the installation efficiency of complex double-curved panels and improved precision fivefold.