Evaluation of the Ground Settlement in an Urban Area Resulting from a Small Curvature Tunneling Construction

The transportation system is one of the major infrastructures in urban areas, and it serves 56% world’s population. Nowadays, metro lines are developing fast areas. Due to restrictions fields, usually not planned straight, a curved line required connect stations different locations city. As result, small curvature tunnels commonly constructed tunneling construction city area may cause ground settlement, which sensitive surrounding buildings underground utilities. aim this study explore impact alignment on settlement. In paper, settlements induced by shield were evaluated using numerical analysis. A total six cases selected for results obtained from simulations compared with Peck’s equation. It observed that equation can be used estimation maximum However, both sides central axis tunnel asymmetrical, equation, provides symmetrical applicable case tunnels.