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Circular Tunnel Steel Formwork is a tunnel-exclusive solution, made of Q355ND steel. It enables full-circle integral forming (diameter 3-10m), ensuring ±2mm roundness precision—critical for tunnel structural safety.?100kN/m2 earth-pressure resistance endures tunnel loads. 85µm hot-dip galvanizing resists humidity (2000h salt-spray). Modular assembly cuts time by 40%. 250+ reuses—ideal for highway, railway, and municipal tunnel projects!
link:https://www.flrsformwork.com/steel-formwork/tunnel-steel-formwork/circular-tunnel-steel-formwork.html
Circular Tunnel Steel Formwork