How Digital Technology Achieves Precise Alignment of Double-Curved GRC Panels: Research on Key Technologies and Application Paths

Driven by the dual forces of contemporary architectural aesthetics and engineering precision, double-curved GRC panels, with their unique curved-surface expressiveness, have become the “form-making code” of landmark buildings, cultural venues, and other high-end projects. However, their complex double-curved geometry and demanding installation precision have long been core technical challenges for the industry. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group takes digital technology as its core driving force. Through the deep integration of parametric design, intelligent production, and precision construction, it has solved the technical problem of precise jointing of double-curved GRC panels, providing a systematic solution for the artistic expression of building envelopes.

Digital Design: The “Translator” Turning Double-Curved Forms from Concept into Reality

The precise jointing of double-curved GRC panels begins with millimeter-level digital design. Relying on its self-developed BIM + parametric design platform, Qinglong Group transforms architects’ abstract ideas into quantifiable digital models. Parametric models built with tools such as Rhino and Grasshopper allow real-time adjustment of the curvature radius, arc variation, and texture details of double-curved surfaces, creating a dynamic closed loop of “design–modify–optimize.” Taking a grand theater project as an example, its facade was assembled from 1,268 double-curved GRC panels. Through digital model rehearsal, node conflicts that could not be detected on conventional 2D drawings were avoided in advance, keeping design deviations within ±2mm and laying a data foundation for subsequent production and installation.

Intelligent Production: “Smart Manufacturing” for Industrial-Grade Precision

The results of digital design must be carried through precisely by an intelligent production system. At its production base in Nanning, Guangxi, Qinglong Group has introduced industrial-grade 3D scanning and CNC machining technology to achieve automated carving of molds for double-curved GRC panels. By importing digital models directly into CNC machines, mold machining precision reaches 0.1mm, ensuring that the curved geometry of every GRC panel is fully consistent with the design. Meanwhile, a “digital material formula management system” dynamically adjusts glass fiber content and concrete mix ratios according to the load-bearing characteristics of double-curved components, keeping the product’s flexural strength consistently above 20MPa to meet the structural load requirements of complex curved surfaces. In 2023, the double-curved GRC sunshading system Qinglong custom-made for a commercial complex achieved “zero-error” delivery of 3,000 special-shaped components through intelligent production, improving installation efficiency by 40%.

Precision Construction: “Millimeter-Level” Control of On-Site Installation

The on-site jointing of double-curved GRC panels is the ultimate test of engineering management capability. Qinglong Group innovatively adopts “3D laser scanning + modular installation” technology, performing a panoramic scan of the building structure before construction to generate a real-world point cloud model for comparison with the design model, correcting structural deviations in advance. During installation, BIM technology provides digital navigation for component positioning, and together with customized lifting fixtures and adjustable supports, ensures that the spatial position error of each GRC panel does not exceed 3mm. In a museum project, the Qinglong team completed the installation of an 1,800㎡ double-curved GRC curtain wall in just 45 days, achieving joint flatness at the industry-leading standard of 0.5mm/2m, perfectly presenting the building’s “flowing curves” design concept.

Full-Chain Collaboration: A Digital Closed Loop from Design to Maintenance

As a national high-tech enterprise integrating detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong Group applies digital technology throughout the entire life cycle of double-curved GRC panel applications. By establishing a “digital twin” system, design parameters, production data, and construction records are traceable throughout the process; in the after-sales stage, IoT sensors monitor the temperature deformation and stress state of GRC panels in real time, providing data support for later maintenance. This full-chain digital capability not only guarantees the precise jointing of double-curved GRC panels, but also maximizes project value from “design concept” to “long-term operation.”

From the double-curved GRC curtain wall of the Dongguan Women and Children’s Activity Center to the translucent concrete project at Century Plaza on Nanjing East Road, Qinglong Group uses digital technology as its brush to outline countless stunning curves on building envelopes. In the future, with the deep integration of AI algorithms and intelligent manufacturing, the application of double-curved GRC panels will break through even more form boundaries, and Qinglong will continue its mission of “creating beautiful architecture,” providing more imaginative material solutions for designers worldwide, so that every curved surface becomes a perfect symbiosis of technology and art.