Challenges and Response Strategies in Double-Curved GRC Curtain Wall O&M and Inspection

As modern architectural aesthetics continue to evolve, double-curved GRC curtain walls have become the preferred decorative solution for high-end projects such as landmark buildings and cultural venues, thanks to their unique curved forms and artistic expressiveness. However, their complex structural geometry and high-altitude working environments also pose numerous challenges for later operation, maintenance and inspection. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on the practice of hundreds of engineering projects, deeply analyzes the core difficulties in the operation, maintenance and inspection of double-curved GRC curtain walls and proposes systematic response strategies.

### I. Three Core Difficulties in the Operation, Maintenance and Inspection of Double-Curved GRC Curtain Walls

The "surface complexity," "high-altitude operation risks," and "material property requirements" of double-curved GRC curtain walls together constitute the main obstacles to maintenance and inspection. First, the non-standardized design of double-curved structures makes inspection paths difficult to plan; inspection platforms designed for traditional flat curtain walls often cannot adapt to the curvature of the surfaces, and some areas are even "inspection blind spots." Second, although GRC components weigh only 1/4 of natural stone, the anchoring systems installed at height are subject to long-term thermal stress and wind pressure loads, and may loosen or suffer fatigue damage, so inspection must balance safety and precision. In addition, the surface texture and color uniformity of GRC materials place extremely high demands on maintenance techniques—routine cleaning or repair can easily cause color differences or structural damage, affecting the overall aesthetics of the building. For more industry information: +WeChat qlfsbl123

### II. Full-Chain Technical Empowerment: Qinglong's Systematic Response Strategies

To address the above difficulties, Qinglong Group leverages its full-chain advantages of "detailed design - manufacturing - construction and installation - after-sales maintenance" to build an operation and maintenance solution featuring "prevention first, technology-driven, intelligent collaboration." At the design stage, BIM technology and parametric modeling are used to pre-plan inspection passages and load-bearing nodes, ensuring accessibility for later maintenance; in production, a mix of high-strength glass fiber and special cement is adopted to improve the crack resistance and durability of GRC components, reducing inspection frequency at the source. During construction, 3D laser scanning positioning technology is introduced to achieve an installation error of ≤2mm for double-curved components, laying a precise foundation for later maintenance.

### III. Intelligent O&M System: From "Passive Repair" to "Active Early Warning"

Qinglong has innovatively integrated IoT technology into curtain wall maintenance, developing a "GRC component health monitoring system." By implanting RFID chips and sensors at key anchoring points, data such as thermal deformation and stress changes are collected in real time, and combined with cloud platform analysis of component health status, early fault warning is achieved. For example, in a grand theater project, the monitoring system detected micro-cracks in some components caused by temperature differences; the maintenance team promptly reinforced them with Qinglong's special repair materials, preventing the problem from escalating. In addition, to tackle the cleaning challenges of double-curved surfaces, Qinglong has developed customized cleaning robots whose magnetic-adhesion travel mechanism adapts to surfaces of different curvatures, balancing cleaning efficiency with component protection.

### IV. Accumulated Industry Experience: Balancing Standardization and Customization

As a co-authoring unit of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong has transformed its 28 years of experience into standardized maintenance procedures covering key links such as component inspection, material replacement, and sealant maintenance. At the same time, customized inspection solutions are provided according to the double-curved features of different projects—for example, for super-large curved components, modular hoisting technology is used to achieve non-destructive replacement; for projects in coastal areas, salt-fog-resistant GRC formulations are selected and anti-corrosion coating maintenance is performed regularly. This "standard + customization" model ensures maintenance quality while improving service efficiency.

The operation, maintenance and inspection of double-curved GRC curtain walls is both a test of material performance and a challenge to technical integration capabilities. Guided by the mission of "creating beautiful architecture," Qinglong Group turns maintenance difficulties into quality-assurance advantages through technological innovation and full-chain services. In the future, as UHPC/GRC/GRG/GRP material technology continues to advance, Qinglong will further explore intelligent and green maintenance modes to safeguard the long-term safety and aesthetics of more landmark buildings. For more industry information: +WeChat qlfsbl123