Influence and Optimization of Geometric Parameters for Small-Radius Curved Tunnel Based on Response Surface Method

Compared with straight tunnels, small-radius curved tunnels are more common and have complex influencing factors in urban underground traffic. Therefore, the seismic evaluation of is great significance for safe operation structures. This paper used numerical analysis response surface method to analyze influence buried depth, curve angle radius on a tunnel. For this purpose, seventeen three-dimensional (3D) models tunnel considering different geometric parameters established. In addition, optimal displacement acceleration studied by using multi-objective optimization design. The results show that depth has pronounced upon tunnel, whilst key affecting parameter configuration maximum within value domain.