Railway Corporation Develops High-Strength Lattice Support Material for Tunnels in Collaboration with SMEs
[Asia Economy (Daejeon) Reporter Jeong Il-woong] The Korea Rail Network Authority announced on the 24th that it has completed the development of a ‘high-strength lattice support’ through a purchase-conditional new product development project with small and medium-sized enterprises.
The purchase-conditional new product development project is a research and development initiative in which the Ministry of SMEs and Startups and the Rail Network Authority support part of the development costs to localize or develop new products for key materials in the railway sector, and purchase a certain scale of products upon successful development.
It is evaluated that the high-strength lattice support developed through this project has further enhanced the safety and efficiency of tunnel excavation work.
Support materials are structures installed immediately after tunnel excavation to prevent tunnel collapse and are currently widely used.
Currently, ‘H-shaped steel supports’ are commonly used on site. However, there are field reports that during the spraying process of shotcrete, a cement mixture, detachment and falling off occur, and the heavy weight makes transportation and installation difficult.
In contrast, the ‘high-strength lattice support’ not only improves the shotcrete detachment issue but also secures both structural safety and construction efficiency with higher strength and reduced weight (10% reduction) compared to the existing H-shaped steel supports.
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Yang Geun-yul, Director of the Future Strategy Research Institute at the Rail Network Authority, said, “We plan to proactively apply the newly developed ‘high-strength lattice support’ from the design stage,” adding, “The Rail Network Authority will use this opportunity to further strengthen technological development cooperation with small and medium-sized enterprises and strive to improve railway construction technology.”
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