Difficulties and Coping Strategies in the Operation, Maintenance and Inspection of Double-Curved GRC Curtain Walls

**O&M and Inspection of Double-Curved GRC Curtain Walls: Solving Key Challenges with Qinglong's Full-Chain Solution to Safeguard Architectural Aesthetics**

As the "outer garment" of modern architecture, building curtain walls not only carry aesthetic expression but must also ensure safety and durability. Among them, double-curved GRC curtain walls, with their fluid curved surfaces and artistic expressiveness, have become a favored choice for landmark buildings. However, their complex structural forms and high-altitude working environments pose many challenges for later operation and maintenance. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on integrated practices from detailed design and manufacturing to after-sales maintenance, provides an in-depth analysis of the O&M challenges of double-curved GRC curtain walls and proposes systematic response strategies.

**I. Core Challenges in O&M and Inspection of Double-Curved GRC Curtain Walls**

The O&M and inspection of double-curved GRC curtain walls is essentially a dual safeguard for both "artistic form" and "engineering safety." The challenges mainly concentrate in the following three aspects:

**1. Inspection Blind Spots of Irregular Structures and Data Collection Difficulties** The complex forms of double-curved GRC curtain walls, such as surface curvature and folded-line transitions, make it difficult for traditional inspection tools to achieve full coverage. For example, conventional infrared detection or ultrasonic testing is easily affected by surface angles, resulting in data deviations. During high-altitude work, personnel cannot get close to certain concealed nodes, such as keel connections and embedded part anchorages, forming inspection "blind spots." In addition, the non-standardized nature of double-curved components means inspection data lack a unified comparison standard, increasing the difficulty of problem diagnosis.

**2. Material Performance Degradation and Environmental Adaptability Challenges** Although GRC materials feature light weight, high strength, and excellent weather resistance, long-term exposure to ultraviolet radiation, temperature variations, acid rain erosion, and other environmental factors may still cause surface cracking, fiber aging, coating peeling, and other problems. The uneven stress distribution of double-curved forms further aggravates localized material fatigue damage. For example, areas with small curvature radii (as small as ≤300mm in some projects) are prone to stress concentration caused by thermal expansion and contraction. If not detected in time, this may lead to component deformation or even detachment risks.

**3. Balancing High-Altitude Work Safety and O&M Costs** Double-curved GRC curtain walls are mostly applied to high-rise or super high-rise buildings. O&M and inspection rely on equipment such as gondolas and aerial work platforms, resulting in high operational risks and low efficiency. Meanwhile, replacement of irregular components requires custom production with long lead times, and the traditional maintenance model often "treats symptoms rather than root causes," lacking whole-life-cycle preventive maintenance plans, keeping O&M costs persistently high.

**II. Qinglong's Full-Chain Solutions: A Systematic Response from Design to Maintenance**

To address the above challenges, Qinglong Group, leveraging its full-chain advantages in "detailed design - manufacturing - construction and installation - after-sales maintenance," has built an O&M system featuring "prevention first, technology empowerment, and precise implementation":

**1. Digital O&M: 3D Scanning and BIM Technology to Solve Inspection Challenges** In the detailed design phase, Qinglong uses Rhino and Grasshopper parametric design along with BIM technology to establish digital twin models of double-curved GRC curtain walls, accurately recording the geometric parameters, installation positions, and stress distribution of each component. During the O&M phase, 3D laser scanning technology performs regular "health checks" on the curtain wall, comparing measured data with digital models to quickly locate anomalies such as deformation and displacement. For example, in a grand theater project, Qinglong, through overlay analysis of the BIM model and on-site scanning data, discovered in advance a component tilt caused by loose embedded parts, averting a potential safety hazard.

**2. Material Performance Monitoring: Whole-Life-Cycle Quality Traceability** All GRC components produced by Qinglong are embedded with RFID chips recording material mix ratios, production batches, installation times, and other information, enabling quality traceability. Meanwhile, sensors are embedded at key curtain wall positions to monitor data such as thermal deformation and vibration frequency in real time. Combined with the material aging simulation technology of Qinglong's laboratory, component performance degradation trends are predicted and targeted maintenance plans are formulated. For example, for projects in hot and humid regions, Qinglong regularly conducts weather resistance tests on GRC surface coatings and performs timely repairs or replacements to extend the curtain wall's service life.

**3. Preventive Maintenance: From "Passive Repair" to "Active Protection"** Relying on after-sales maintenance teams across the country, Qinglong has established a "regular inspection + emergency response" mechanism. Based on the characteristics of double-curved GRC curtain walls, differentiated inspection cycles are formulated: areas with complex curvature and stress concentration are inspected every six months, and conventional areas once a year. Meanwhile, drone aerial photography and high-definition imaging technology enable contactless preliminary screening, reducing high-altitude work risks. For material replacement, Qinglong, with production bases offering an annual capacity of 600,000 square meters, can quickly respond to customized needs and shorten repair cycles.

**III. Industry Practice: Lessons from Qinglong's Double-Curved GRC Curtain Wall O&M Cases**

In a cultural center project in Dongguan, the double-curved GRC curtain wall reached a height of 50 meters with complex curved forms. Through comparative analysis of the BIM model and on-site scanning data, the Qinglong team found that some components had undergone slight displacement due to long-term wind pressure loads. Subsequently, customized clamps were used for reinforcement and sealing strips were replaced, which not only resolved the safety hazard but also avoided large-scale demolition and reconstruction, saving more than 30% in O&M costs. This case validates the effectiveness of the full-chain O&M solution and reflects Qinglong's core advantages as a UHPC/GRC/GRG/GRP manufacturer in technical implementation and practical experience.

The O&M and inspection of double-curved GRC curtain walls is a comprehensive test of material performance, engineering technology, and management capabilities. Building on 28 years of industry experience, Qinglong Group carries the mission of "creating beautiful architecture" throughout the entire building life cycle through digital technology, material innovation, and systematic services. Going forward, Qinglong will continue to explore the synergistic application of GRC with UHPC, GRG, and other materials, providing designers and owners with safer, more durable, and more aesthetically valuable architectural decoration solutions, helping China's building curtain wall industry advance toward high-quality development.