While both steel and aluminum are used in the construction of tunnel lining trolleys, steel is generally considered more durable for this demanding application.
Differences between steel and aluminum tunnel lining trolleys
Steel:
Higher Strength and Stiffness: Steel possesses significantly higher tensile and yield strength compared to aluminum. This allows steel trolleys to withstand the substantial loads and pressures exerted by wet concrete during the lining process without excessive deformation or failure. The inherent stiffness of steel also contributes to maintaining the precise shape of the tunnel lining formwork.
Better Resistance to Abrasion and Impact: Tunnel construction environments are often abrasive, with exposure to concrete, rock, and other materials. Steel offers superior resistance to wear and tear from abrasion and impacts, prolonging the lifespan of the trolley.
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