What Are the Difficulties in Operation, Maintenance and Inspection of Double-Curved GRC Curtain Walls? O&M Challenges and Qinglong Group's Full-Cycle Management Solution

The operation and maintenance (O&M) of double-curved GRC curtain walls faces four prominent challenges: "difficulty in inspection and localization, difficulty in high-altitude work, difficulty in repair matching, and difficulty in cleaning and maintenance." Their complex spatial curved geometry poses severe challenges to traditional O&M methods. Based on more than 10 years of O&M management experience with double-curved curtain wall projects such as the Wuhan Han Show Theatre and Hainan International Convention and Exhibition Center, Qinglong Group has gained a deep understanding: curved surfaces render conventional inspection instruments (such as straightedge rulers) inapplicable; irregular panels lack standardized spare parts and must be custom-made after damage; curved surfaces cannot be cleaned with conventional gondolas, and water flow trajectories are difficult to control. In the O&M of the wave-shaped roof at the Hainan Convention and Exhibition Center, we innovatively introduced drones equipped with infrared thermal imagers to scan for leakage points, used BIM models to generate a "digital identity card" for each panel to achieve precise localization, and developed a profile-following cleaning robot, improving O&M efficiency by 50% and reducing costs by 30%. The O&M of double-curved curtain walls requires digital and intelligent means to solve the complexity of their physical geometry.

The Challenge of Precision in Inspection and Diagnosis

Cracks, hollowing, and leaks on double-curved surfaces are difficult to accurately locate and assess with the naked eye and simple tools. Qinglong Group's solution is to build a "digital twin O&M platform" that combines the as-built BIM model with IoT sensor and drone inspection data. By comparing deviations between the design model and actual conditions, problem panels can be precisely located. In the Nanning New Media Center project, this platform reduced fault localization time from an average of 2 days to 2 hours.

The Customization Challenge in Repair and Replacement

Almost every double-curved panel is unique; producing replacements after damage requires costly and time-consuming re-opening of molds. We adopt a "reserved spare panels + digital mold library" strategy. During the production stage, spare panels are manufactured at a certain ratio (typically 1-2%), and the digital molds of these panels are archived. Once replacement is needed, data can be quickly retrieved to start production. In a repair project in Shenzhen, it took only 15 days from order placement to replacement.

Operational Risks in High-Altitude Cleaning and Maintenance

Curved surface cleaning cannot be handled by ordinary gondolas in a one-size-fits-all manner, and manual cleaning is risky and inefficient. In partnership with universities, we developed a "self-adaptive curved surface cleaning robot" that can attach to the curtain wall surface and perform high-pressure water washing and scrubbing along preset paths. On large projects, its efficiency is 3-5 times that of manual cleaning, and it is safer.

Data Accumulation for Long-Term Performance Monitoring

To provide a basis for predictive maintenance, we embed sensors at key locations to monitor strain, temperature, humidity, and other data, analyzing the long-term performance evolution of double-curved panels under complex loading. These data are a valuable asset for optimizing future design and O&M plans.

The O&M of double-curved curtain walls has entered the era of "digital O&M and smart O&M." Through continuous innovation in technology and management, Qinglong Group transforms O&M challenges into opportunities for value creation, ensuring the lasting appeal of landmark buildings.