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Engineered for underground environments, our ringlock scaffolding systems deliver unmatched stability, safety, and efficiency in tunnel construction projects worldwide.
A comprehensive look at the most trusted modular scaffolding system for underground infrastructure.
Ringlock scaffolding — also known as rosette scaffolding or modular ring-lock scaffolding — is a highly engineered temporary structure system widely adopted in complex construction environments. Its defining feature is the rosette node: a circular steel disc welded to the vertical standard at regular intervals, allowing up to eight horizontal or diagonal ledgers to connect simultaneously at any angle without the need for loose fittings or bolts.
In tunnel construction, this multi-directional connectivity is not merely a convenience — it is a critical engineering necessity. Tunnels present some of the most demanding spatial and structural challenges in civil engineering: curved profiles, confined cross-sections, heavy overhead loads from concrete formwork, and strict safety requirements for workers operating in enclosed underground environments. Ringlock scaffolding addresses all of these challenges with a system that is simultaneously flexible, fast to assemble, and structurally robust.
The ringlock system's ability to form curved and non-orthogonal geometries makes it uniquely suited for arched tunnel linings, cut-and-cover sections, and underground station vaults — environments where conventional tube-and-coupler or frame scaffolding simply cannot perform safely or efficiently.
The global scaffolding market was valued at approximately USD 58 billion in 2023 and is projected to exceed USD 80 billion by 2030, driven significantly by massive infrastructure investment in transportation tunnels, urban metro systems, highway underpasses, and hydropower tunnels. Ringlock scaffolding holds an increasingly dominant share of this market in the tunnel construction segment, displacing older systems such as traditional tube-and-coupler scaffolding and H-frame scaffolding.
In Asia-Pacific — particularly China, India, Southeast Asia, and Australia — tunnel construction activity has surged due to high-speed rail expansion, urban metro network development, and cross-mountain highway projects. China alone has over 20,000 km of railway tunnels in operation, with thousands more under construction. The Middle East's Vision 2030 infrastructure programs and Europe's ongoing TEN-T corridor development are further accelerating demand for advanced scaffolding systems capable of meeting modern safety and efficiency standards.
Manufacturers like Zhuozhan Group have positioned themselves at the forefront of this growth, supplying hot-dip galvanized ringlock scaffolding systems that comply with international standards including EN 12810/12811 and ISO 9001, and exporting to more than 30 countries across Asia, Europe, the Americas, and Africa.
The tunnel construction sector is evolving rapidly — and ringlock scaffolding is evolving with it.
Building Information Modeling (BIM) is transforming how tunnel scaffolding is designed. Engineers now pre-plan entire ringlock scaffold configurations in 3D digital environments before a single component reaches the site. This reduces material waste by up to 20%, shortens planning time, and eliminates on-site improvisation — critical in confined tunnel environments where errors are costly and dangerous.
The integration of electric scaffolding lift platforms with ringlock base structures is a major emerging trend. In long-span tunnels and large underground caverns, electric-powered working platforms mounted on ringlock frames allow workers to reach overhead surfaces safely and efficiently, dramatically cutting manual labor and improving productivity for concrete lining, MEP installation, and finishing works.
Tunnel environments are notoriously corrosive — high humidity, groundwater seepage, and chemical exposure from concrete and shotcrete attack unprotected steel rapidly. The industry is moving firmly toward hot-dip galvanized ringlock scaffolding as the baseline standard, offering 50+ years of corrosion protection and dramatically reducing lifecycle costs compared to painted or bare steel alternatives.
Sustainability mandates from governments and project owners are pushing contractors to adopt fully reusable modular scaffolding systems. Ringlock's standardized components can be reused hundreds of times across multiple projects, reducing embodied carbon, lowering per-project material costs, and contributing to green construction certifications such as LEED and BREEAM.
Major construction contractors increasingly source ringlock scaffolding directly from Chinese manufacturers to achieve cost efficiencies without compromising quality. China-based factories like Hebei Shuangyang Metal Structure supply certified, export-ready ringlock systems with full documentation, competitive lead times, and responsive technical support — making global procurement straightforward and reliable.
Regulatory bodies worldwide are tightening scaffolding safety standards for confined space and underground work. The ringlock system's inherent structural integrity — with load-rated rosette connections, standardized component tolerances, and no loose fittings — makes it the preferred choice for projects subject to rigorous third-party safety audits and compliance inspections.
Ringlock scaffolding adapts to the full spectrum of tunnel construction challenges across multiple industries.
In cut-and-cover metro construction and bored tunnel lining operations, ringlock scaffolding provides the formwork support structures needed to cast concrete tunnel linings to precise tolerances. The system's modular nature allows rapid reconfiguration as the work face advances, while the galvanized finish withstands the wet, chemical-laden underground environment. Multi-level working platforms enable simultaneous work on different tunnel sections, compressing project schedules significantly.
High-speed rail tunnels demand exceptional dimensional accuracy in their concrete linings. Ringlock scaffolding supports the heavy steel formwork travelers used to cast the secondary lining, bearing loads of several tonnes per square meter. The system's high-strength Q345 steel components and rigid rosette connections ensure zero deflection under these extreme loads, guaranteeing the geometric precision required for high-speed operations at 350+ km/h.
Large-diameter hydropower tunnels and underground powerhouse caverns require scaffolding systems that can span enormous cross-sections — sometimes exceeding 25 meters in height and 30 meters in width. Ringlock scaffolding's ability to create multi-story, heavily loaded access platforms makes it indispensable for concrete lining, equipment installation, and maintenance works in these massive underground spaces. Hot-dip galvanization is essential given the permanently wet conditions.
Aging highway tunnels worldwide require periodic structural rehabilitation — crack repair, re-lining, waterproofing, and MEP system upgrades. Ringlock scaffolding enables contractors to create safe, accessible working platforms inside operational or recently closed tunnels with minimal setup time. The system's low profile and flexible configuration allow traffic lanes to remain partially open during works, reducing economic disruption and project costs.
Industrial facilities, petrochemical plants, and mining operations rely on extensive underground tunnel networks for utilities, material transport, and personnel access. Ringlock scaffolding supports installation and maintenance of piping, cable trays, ventilation systems, and structural reinforcements within these tunnels. The system's rapid assembly and disassembly capability minimizes production downtime during planned maintenance shutdowns.
Immersed tube tunnels and bored subsea tunnels connecting islands, crossing harbors, or spanning river estuaries present extreme environmental challenges. Ringlock scaffolding's hot-dip galvanized finish provides the corrosion resistance needed in saline and high-humidity conditions. Specialized configurations support waterproofing membrane installation, joint sealing, and internal fitting-out works in these critical infrastructure assets.
The rosette (ringlock) node is engineered to transfer loads in multiple directions simultaneously. Each standard rosette node can accommodate ledger connections at 0°, 45°, 90°, and 135° — and any intermediate angle — allowing scaffolding to follow the curved geometry of tunnel profiles precisely. High-strength Q345 steel rosettes are tested to bear vertical loads exceeding 60 kN per standard, making them fully capable of supporting the heavy formwork systems used in tunnel concrete lining operations.
A manufacturing powerhouse delivering world-class ringlock scaffolding to global tunnel construction projects.
Integrating scientific research, manufacturing, and global trade to deliver superior scaffolding solutions.
Zhuozhan Group is a diversified and innovative enterprise that seamlessly integrates scientific research, manufacturing, and sales. With a robust portfolio of subsidiaries, including Laoting Zhuozhan International Trade Co., Ltd. and Hebei Shuangyang Metal Structure Co., Ltd., Zhuozhan Group has firmly established itself as a key player in the construction and manufacturing industries.
Founded in 2014, Hebei Shuangyang Metal Structure is a pivotal subsidiary that has rapidly advanced to the forefront of the industry, occupying a total area of 13,132.68 square meters, with a construction area of 7,124.58 square meters. The company operates with more than 500 skilled employees and is equipped with over 150 sets of advanced machinery and equipment. Over the years, Shuangyang has successfully secured 15 patents, demonstrating its strong commitment to innovation. The company's impressive production capabilities include an annual output of 300,000 tons of steel pipes, 1 million tons of scaffolding, and 400,000 tons of adjustable steel supports, making it a critical supplier to both domestic and international markets.
Four core pillars that make Zhuozhan Group the preferred supplier for tunnel construction scaffolding worldwide.
The ring lock scaffolding of Zhuozhan Industry has passed multiple international quality certifications (such as EN 12810/12811, ISO 9001). High-strength hot-dip galvanized steel, with strong corrosion resistance and a long service life. The nodes have strong rigidity and the overall structure is stable. Modular design, quick installation and convenient disassembly.
The Laoting Zhuozhan International Trade division plays a vital role in connecting Zhuozhan Group with global markets, focusing on providing customer-oriented solutions for a wide range of projects.
By understanding the unique needs of each client, the company crafts tailor-made solutions that help clients achieve greater success and sustainable growth.
Zhuozhan International Trade's customer-first approach, coupled with its expertise in logistics and timely delivery, has made it a trusted partner for many clients across Asia, Europe, the United States, and Africa.
Zhuozhan Group's products are widely recognized for their superior quality and reliability. With a strong presence across more than 30 provinces in China, the group collaborates with over 150 manufacturers, including several key enterprises in the industry. Its products are exported to a variety of global markets, including Asia, Europe, the United States, and Africa. The high quality of its products and services has earned the company significant recognition and a loyal customer base overseas.
In the past year, Zhuozhan Group achieved remarkable sales, surpassing 20 million US dollars, which reflects not only the competitiveness of its offerings but also its strong potential for future growth. With a strategic focus on continuous innovation, product excellence, and global expansion, Zhuozhan Group is well-positioned to maintain its leadership in the industry and contribute to the sustainable development of global construction infrastructure.
Every ringlock scaffolding component we manufacture meets the highest international standards for safety and durability.
The ring lock scaffolding of Zhuozhan Industry has passed multiple international quality certifications (such as EN 12810/12811, ISO 9001).
High-strength hot-dip galvanized steel, with strong corrosion resistance and a long service life — ideal for the harsh tunnel environment.
The nodes have strong rigidity and the overall structure is stable — critical for load-bearing formwork support in tunnel lining works.
Modular design, quick installation and convenient disassembly — maximizing productivity in time-critical tunnel construction schedules.
Our certifications demonstrate our unwavering commitment to quality, safety, and international compliance standards.
Explore our state-of-the-art manufacturing facility — where precision engineering meets large-scale production capability.
Through ongoing commitment to quality, technological advancement, and customer satisfaction, Zhuozhan Group remains dedicated to fostering cooperative growth with its partners, building stronger relationships, and achieving mutual success on the global stage. Contact us today for customized ringlock scaffolding solutions tailored to your tunnel construction project.
Explore our full range of scaffolding systems designed for diverse construction environments and project requirements.
