Parametric Structural Calculation of Shield Linings for Large-Diameter Tunnels Based on the Shell-Spring Model

摘要

Structural calculations are essential for segmental lining design, especially in shield tunnels with large diameters. Compared with the conventional 2D structural calculation models, the 3D shell-spring model can explicitly represent detailed structural features such as joints and shields. This study proposes a parametric shell-spring modeling method (PSSMM) that can realize segment typesetting, joint setting, and load arrangement in an automatic and intelligent manner for parametric structural calculation. The PSSMM is applied to a large-diameter tunnel design project for verification. The results show that the PSSMM is feasible for the structural calculation of shield tunnel linings and has advantages over existing methods in modeling efficiency and result visualization. Moreover, the PSSMM can effectively reflect the joint performance effect, which shows that the PSSMM can be adapted to advanced tunnel lining design.