The Operating Principles of Tunnel Anchor Bolts and the Logic Behind Steel Selection
This article sets out the operating principles of four types of tunnel anchor bolts—suspension, composite beam, tension and compression arch—along with the rock mass conditions to which they are applicable, and explains that the strength and diameter of steels such as HRB400 and HRB500 should be selected accordingly to ensure that the anchor bolts are configured in accordance with mechanical requirements.